





























































   45 










   44 

















  148 







   34 


    3 
















  138 









   10 








    6 








    1 



    3 
    1 

    2 











    1 



































































    1 













    1 
  139 
    1 




  138 




  142 











   47 




   47 


   37 

   37 




   10 





   10 





    6 




    6 


    2 





    4 










    6 















    5 



   44 


    4 








    3 








    8 





    1 



    8 


    8 
    1 





















   29 


























































    1 



    1 
    1 




    1 





   90 











   63 


    3 
















   73 



   23 






   46 

   37 











   14 


    2 





   46 


   89 
   16 






   27 

















    4 







   10 




    3 


   53 







































    1 






















   26 

















   26 























































   19 



   16 
    3 



















   19 












    2 




    1 










    4 
    2 




    4 
    3 


    6 










    1 



   14 




    5 
    9 





















  208 









    1 

    9 

    1 


   64 

    2 






    1 

   15 






    1 

    1 

    1 





   71 

  101 






   17 










   18 








   15 























































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
// SPDX-License-Identifier: GPL-2.0-only
/*
 * vhost transport for vsock
 *
 * Copyright (C) 2013-2015 Red Hat, Inc.
 * Author: Asias He <asias@redhat.com>
 *         Stefan Hajnoczi <stefanha@redhat.com>
 */
#include <linux/miscdevice.h>
#include <linux/atomic.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/vmalloc.h>
#include <net/sock.h>
#include <linux/virtio_vsock.h>
#include <linux/vhost.h>
#include <linux/hashtable.h>

#include <net/af_vsock.h>
#include "vhost.h"

#define VHOST_VSOCK_DEFAULT_HOST_CID        2
/* Max number of bytes transferred before requeueing the job.
 * Using this limit prevents one virtqueue from starving others. */
#define VHOST_VSOCK_WEIGHT 0x80000
/* Max number of packets transferred before requeueing the job.
 * Using this limit prevents one virtqueue from starving others with
 * small pkts.
 */
#define VHOST_VSOCK_PKT_WEIGHT 256

enum {
        VHOST_VSOCK_FEATURES = VHOST_FEATURES |
                               (1ULL << VIRTIO_F_ACCESS_PLATFORM) |
                               (1ULL << VIRTIO_VSOCK_F_SEQPACKET)
};

enum {
        VHOST_VSOCK_BACKEND_FEATURES = (1ULL << VHOST_BACKEND_F_IOTLB_MSG_V2)
};

/* Used to track all the vhost_vsock instances on the system. */
static DEFINE_MUTEX(vhost_vsock_mutex);
static DEFINE_READ_MOSTLY_HASHTABLE(vhost_vsock_hash, 8);

struct vhost_vsock {
        struct vhost_dev dev;
        struct vhost_virtqueue vqs[2];

        /* Link to global vhost_vsock_hash, writes use vhost_vsock_mutex */
        struct hlist_node hash;

        struct vhost_work send_pkt_work;
        struct sk_buff_head send_pkt_queue; /* host->guest pending packets */

        atomic_t queued_replies;

        u32 guest_cid;
        bool seqpacket_allow;
};

static u32 vhost_transport_get_local_cid(void)
{
        return VHOST_VSOCK_DEFAULT_HOST_CID;
}

/* Callers that dereference the return value must hold vhost_vsock_mutex or the
 * RCU read lock.
 */
static struct vhost_vsock *vhost_vsock_get(u32 guest_cid)
{
        struct vhost_vsock *vsock;

        hash_for_each_possible_rcu(vhost_vsock_hash, vsock, hash, guest_cid) {
                u32 other_cid = vsock->guest_cid;

                /* Skip instances that have no CID yet */
                if (other_cid == 0)
                        continue;

                if (other_cid == guest_cid)
                        return vsock;

        }

        return NULL;
}

static void
vhost_transport_do_send_pkt(struct vhost_vsock *vsock,
                            struct vhost_virtqueue *vq)
{
        struct vhost_virtqueue *tx_vq = &vsock->vqs[VSOCK_VQ_TX];
        int pkts = 0, total_len = 0;
        bool added = false;
        bool restart_tx = false;

        mutex_lock(&vq->mutex);

        if (!vhost_vq_get_backend(vq))
                goto out;

        if (!vq_meta_prefetch(vq))
                goto out;

        /* Avoid further vmexits, we're already processing the virtqueue */
        vhost_disable_notify(&vsock->dev, vq);

        do {
                struct virtio_vsock_hdr *hdr;
                size_t iov_len, payload_len;
                struct iov_iter iov_iter;
                u32 flags_to_restore = 0;
                struct sk_buff *skb;
                unsigned out, in;
                size_t nbytes;
                u32 offset;
                int head;

                skb = virtio_vsock_skb_dequeue(&vsock->send_pkt_queue);

                if (!skb) {
                        vhost_enable_notify(&vsock->dev, vq);
                        break;
                }

                head = vhost_get_vq_desc(vq, vq->iov, ARRAY_SIZE(vq->iov),
                                         &out, &in, NULL, NULL);
                if (head < 0) {
                        virtio_vsock_skb_queue_head(&vsock->send_pkt_queue, skb);
                        break;
                }

                if (head == vq->num) {
                        virtio_vsock_skb_queue_head(&vsock->send_pkt_queue, skb);
                        /* We cannot finish yet if more buffers snuck in while
                         * re-enabling notify.
                         */
                        if (unlikely(vhost_enable_notify(&vsock->dev, vq))) {
                                vhost_disable_notify(&vsock->dev, vq);
                                continue;
                        }
                        break;
                }

                if (out) {
                        kfree_skb(skb);
                        vq_err(vq, "Expected 0 output buffers, got %u\n", out);
                        break;
                }

                iov_len = iov_length(&vq->iov[out], in);
                if (iov_len < sizeof(*hdr)) {
                        kfree_skb(skb);
                        vq_err(vq, "Buffer len [%zu] too small\n", iov_len);
                        break;
                }

                iov_iter_init(&iov_iter, ITER_DEST, &vq->iov[out], in, iov_len);
                offset = VIRTIO_VSOCK_SKB_CB(skb)->offset;
                payload_len = skb->len - offset;
                hdr = virtio_vsock_hdr(skb);

                /* If the packet is greater than the space available in the
                 * buffer, we split it using multiple buffers.
                 */
                if (payload_len > iov_len - sizeof(*hdr)) {
                        payload_len = iov_len - sizeof(*hdr);

                        /* As we are copying pieces of large packet's buffer to
                         * small rx buffers, headers of packets in rx queue are
                         * created dynamically and are initialized with header
                         * of current packet(except length). But in case of
                         * SOCK_SEQPACKET, we also must clear message delimeter
                         * bit (VIRTIO_VSOCK_SEQ_EOM) and MSG_EOR bit
                         * (VIRTIO_VSOCK_SEQ_EOR) if set. Otherwise,
                         * there will be sequence of packets with these
                         * bits set. After initialized header will be copied to
                         * rx buffer, these required bits will be restored.
                         */
                        if (le32_to_cpu(hdr->flags) & VIRTIO_VSOCK_SEQ_EOM) {
                                hdr->flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM);
                                flags_to_restore |= VIRTIO_VSOCK_SEQ_EOM;

                                if (le32_to_cpu(hdr->flags) & VIRTIO_VSOCK_SEQ_EOR) {
                                        hdr->flags &= ~cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
                                        flags_to_restore |= VIRTIO_VSOCK_SEQ_EOR;
                                }
                        }
                }

                /* Set the correct length in the header */
                hdr->len = cpu_to_le32(payload_len);

                nbytes = copy_to_iter(hdr, sizeof(*hdr), &iov_iter);
                if (nbytes != sizeof(*hdr)) {
                        kfree_skb(skb);
                        vq_err(vq, "Faulted on copying pkt hdr\n");
                        break;
                }

                if (skb_copy_datagram_iter(skb,
                                           offset,
                                           &iov_iter,
                                           payload_len)) {
                        kfree_skb(skb);
                        vq_err(vq, "Faulted on copying pkt buf\n");
                        break;
                }

                /* Deliver to monitoring devices all packets that we
                 * will transmit.
                 */
                virtio_transport_deliver_tap_pkt(skb);

                vhost_add_used(vq, head, sizeof(*hdr) + payload_len);
                added = true;

                VIRTIO_VSOCK_SKB_CB(skb)->offset += payload_len;
                total_len += payload_len;

                /* If we didn't send all the payload we can requeue the packet
                 * to send it with the next available buffer.
                 */
                if (VIRTIO_VSOCK_SKB_CB(skb)->offset < skb->len) {
                        hdr->flags |= cpu_to_le32(flags_to_restore);

                        /* We are queueing the same skb to handle
                         * the remaining bytes, and we want to deliver it
                         * to monitoring devices in the next iteration.
                         */
                        virtio_vsock_skb_clear_tap_delivered(skb);
                        virtio_vsock_skb_queue_head(&vsock->send_pkt_queue, skb);
                } else {
                        if (virtio_vsock_skb_reply(skb)) {
                                int val;

                                val = atomic_dec_return(&vsock->queued_replies);

                                /* Do we have resources to resume tx
                                 * processing?
                                 */
                                if (val + 1 == tx_vq->num)
                                        restart_tx = true;
                        }

                        consume_skb(skb);
                }
        } while(likely(!vhost_exceeds_weight(vq, ++pkts, total_len)));
        if (added)
                vhost_signal(&vsock->dev, vq);

out:
        mutex_unlock(&vq->mutex);

        if (restart_tx)
                vhost_poll_queue(&tx_vq->poll);
}

static void vhost_transport_send_pkt_work(struct vhost_work *work)
{
        struct vhost_virtqueue *vq;
        struct vhost_vsock *vsock;

        vsock = container_of(work, struct vhost_vsock, send_pkt_work);
        vq = &vsock->vqs[VSOCK_VQ_RX];

        vhost_transport_do_send_pkt(vsock, vq);
}

static int
vhost_transport_send_pkt(struct sk_buff *skb)
{
        struct virtio_vsock_hdr *hdr = virtio_vsock_hdr(skb);
        struct vhost_vsock *vsock;
        int len = skb->len;

        rcu_read_lock();

        /* Find the vhost_vsock according to guest context id  */
        vsock = vhost_vsock_get(le64_to_cpu(hdr->dst_cid));
        if (!vsock) {
                rcu_read_unlock();
                kfree_skb(skb);
                return -ENODEV;
        }

        if (virtio_vsock_skb_reply(skb))
                atomic_inc(&vsock->queued_replies);

        virtio_vsock_skb_queue_tail(&vsock->send_pkt_queue, skb);
        vhost_vq_work_queue(&vsock->vqs[VSOCK_VQ_RX], &vsock->send_pkt_work);

        rcu_read_unlock();
        return len;
}

static int
vhost_transport_cancel_pkt(struct vsock_sock *vsk)
{
        struct vhost_vsock *vsock;
        int cnt = 0;
        int ret = -ENODEV;

        rcu_read_lock();

        /* Find the vhost_vsock according to guest context id  */
        vsock = vhost_vsock_get(vsk->remote_addr.svm_cid);
        if (!vsock)
                goto out;

        cnt = virtio_transport_purge_skbs(vsk, &vsock->send_pkt_queue);

        if (cnt) {
                struct vhost_virtqueue *tx_vq = &vsock->vqs[VSOCK_VQ_TX];
                int new_cnt;

                new_cnt = atomic_sub_return(cnt, &vsock->queued_replies);
                if (new_cnt + cnt >= tx_vq->num && new_cnt < tx_vq->num)
                        vhost_poll_queue(&tx_vq->poll);
        }

        ret = 0;
out:
        rcu_read_unlock();
        return ret;
}

static struct sk_buff *
vhost_vsock_alloc_skb(struct vhost_virtqueue *vq,
                      unsigned int out, unsigned int in)
{
        struct virtio_vsock_hdr *hdr;
        struct iov_iter iov_iter;
        struct sk_buff *skb;
        size_t payload_len;
        size_t nbytes;
        size_t len;

        if (in != 0) {
                vq_err(vq, "Expected 0 input buffers, got %u\n", in);
                return NULL;
        }

        len = iov_length(vq->iov, out);

        /* len contains both payload and hdr */
        skb = virtio_vsock_alloc_skb(len, GFP_KERNEL);
        if (!skb)
                return NULL;

        iov_iter_init(&iov_iter, ITER_SOURCE, vq->iov, out, len);

        hdr = virtio_vsock_hdr(skb);
        nbytes = copy_from_iter(hdr, sizeof(*hdr), &iov_iter);
        if (nbytes != sizeof(*hdr)) {
                vq_err(vq, "Expected %zu bytes for pkt->hdr, got %zu bytes\n",
                       sizeof(*hdr), nbytes);
                kfree_skb(skb);
                return NULL;
        }

        payload_len = le32_to_cpu(hdr->len);

        /* No payload */
        if (!payload_len)
                return skb;

        /* The pkt is too big or the length in the header is invalid */
        if (payload_len > VIRTIO_VSOCK_MAX_PKT_BUF_SIZE ||
            payload_len + sizeof(*hdr) > len) {
                kfree_skb(skb);
                return NULL;
        }

        virtio_vsock_skb_rx_put(skb);

        nbytes = copy_from_iter(skb->data, payload_len, &iov_iter);
        if (nbytes != payload_len) {
                vq_err(vq, "Expected %zu byte payload, got %zu bytes\n",
                       payload_len, nbytes);
                kfree_skb(skb);
                return NULL;
        }

        return skb;
}

/* Is there space left for replies to rx packets? */
static bool vhost_vsock_more_replies(struct vhost_vsock *vsock)
{
        struct vhost_virtqueue *vq = &vsock->vqs[VSOCK_VQ_TX];
        int val;

        smp_rmb(); /* paired with atomic_inc() and atomic_dec_return() */
        val = atomic_read(&vsock->queued_replies);

        return val < vq->num;
}

static bool vhost_transport_msgzerocopy_allow(void)
{
        return true;
}

static bool vhost_transport_seqpacket_allow(u32 remote_cid);

static struct virtio_transport vhost_transport = {
        .transport = {
                .module                   = THIS_MODULE,

                .get_local_cid            = vhost_transport_get_local_cid,

                .init                     = virtio_transport_do_socket_init,
                .destruct                 = virtio_transport_destruct,
                .release                  = virtio_transport_release,
                .connect                  = virtio_transport_connect,
                .shutdown                 = virtio_transport_shutdown,
                .cancel_pkt               = vhost_transport_cancel_pkt,

                .dgram_enqueue            = virtio_transport_dgram_enqueue,
                .dgram_dequeue            = virtio_transport_dgram_dequeue,
                .dgram_bind               = virtio_transport_dgram_bind,
                .dgram_allow              = virtio_transport_dgram_allow,

                .stream_enqueue           = virtio_transport_stream_enqueue,
                .stream_dequeue           = virtio_transport_stream_dequeue,
                .stream_has_data          = virtio_transport_stream_has_data,
                .stream_has_space         = virtio_transport_stream_has_space,
                .stream_rcvhiwat          = virtio_transport_stream_rcvhiwat,
                .stream_is_active         = virtio_transport_stream_is_active,
                .stream_allow             = virtio_transport_stream_allow,

                .seqpacket_dequeue        = virtio_transport_seqpacket_dequeue,
                .seqpacket_enqueue        = virtio_transport_seqpacket_enqueue,
                .seqpacket_allow          = vhost_transport_seqpacket_allow,
                .seqpacket_has_data       = virtio_transport_seqpacket_has_data,

                .msgzerocopy_allow        = vhost_transport_msgzerocopy_allow,

                .notify_poll_in           = virtio_transport_notify_poll_in,
                .notify_poll_out          = virtio_transport_notify_poll_out,
                .notify_recv_init         = virtio_transport_notify_recv_init,
                .notify_recv_pre_block    = virtio_transport_notify_recv_pre_block,
                .notify_recv_pre_dequeue  = virtio_transport_notify_recv_pre_dequeue,
                .notify_recv_post_dequeue = virtio_transport_notify_recv_post_dequeue,
                .notify_send_init         = virtio_transport_notify_send_init,
                .notify_send_pre_block    = virtio_transport_notify_send_pre_block,
                .notify_send_pre_enqueue  = virtio_transport_notify_send_pre_enqueue,
                .notify_send_post_enqueue = virtio_transport_notify_send_post_enqueue,
                .notify_buffer_size       = virtio_transport_notify_buffer_size,
                .notify_set_rcvlowat      = virtio_transport_notify_set_rcvlowat,

                .read_skb = virtio_transport_read_skb,
        },

        .send_pkt = vhost_transport_send_pkt,
};

static bool vhost_transport_seqpacket_allow(u32 remote_cid)
{
        struct vhost_vsock *vsock;
        bool seqpacket_allow = false;

        rcu_read_lock();
        vsock = vhost_vsock_get(remote_cid);

        if (vsock)
                seqpacket_allow = vsock->seqpacket_allow;

        rcu_read_unlock();

        return seqpacket_allow;
}

static void vhost_vsock_handle_tx_kick(struct vhost_work *work)
{
        struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue,
                                                  poll.work);
        struct vhost_vsock *vsock = container_of(vq->dev, struct vhost_vsock,
                                                 dev);
        int head, pkts = 0, total_len = 0;
        unsigned int out, in;
        struct sk_buff *skb;
        bool added = false;

        mutex_lock(&vq->mutex);

        if (!vhost_vq_get_backend(vq))
                goto out;

        if (!vq_meta_prefetch(vq))
                goto out;

        vhost_disable_notify(&vsock->dev, vq);
        do {
                struct virtio_vsock_hdr *hdr;

                if (!vhost_vsock_more_replies(vsock)) {
                        /* Stop tx until the device processes already
                         * pending replies.  Leave tx virtqueue
                         * callbacks disabled.
                         */
                        goto no_more_replies;
                }

                head = vhost_get_vq_desc(vq, vq->iov, ARRAY_SIZE(vq->iov),
                                         &out, &in, NULL, NULL);
                if (head < 0)
                        break;

                if (head == vq->num) {
                        if (unlikely(vhost_enable_notify(&vsock->dev, vq))) {
                                vhost_disable_notify(&vsock->dev, vq);
                                continue;
                        }
                        break;
                }

                skb = vhost_vsock_alloc_skb(vq, out, in);
                if (!skb) {
                        vq_err(vq, "Faulted on pkt\n");
                        continue;
                }

                total_len += sizeof(*hdr) + skb->len;

                /* Deliver to monitoring devices all received packets */
                virtio_transport_deliver_tap_pkt(skb);

                hdr = virtio_vsock_hdr(skb);

                /* Only accept correctly addressed packets */
                if (le64_to_cpu(hdr->src_cid) == vsock->guest_cid &&
                    le64_to_cpu(hdr->dst_cid) ==
                    vhost_transport_get_local_cid())
                        virtio_transport_recv_pkt(&vhost_transport, skb);
                else
                        kfree_skb(skb);

                vhost_add_used(vq, head, 0);
                added = true;
        } while(likely(!vhost_exceeds_weight(vq, ++pkts, total_len)));

no_more_replies:
        if (added)
                vhost_signal(&vsock->dev, vq);

out:
        mutex_unlock(&vq->mutex);
}

static void vhost_vsock_handle_rx_kick(struct vhost_work *work)
{
        struct vhost_virtqueue *vq = container_of(work, struct vhost_virtqueue,
                                                poll.work);
        struct vhost_vsock *vsock = container_of(vq->dev, struct vhost_vsock,
                                                 dev);

        vhost_transport_do_send_pkt(vsock, vq);
}

static int vhost_vsock_start(struct vhost_vsock *vsock)
{
        struct vhost_virtqueue *vq;
        size_t i;
        int ret;

        mutex_lock(&vsock->dev.mutex);

        ret = vhost_dev_check_owner(&vsock->dev);
        if (ret)
                goto err;

        for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
                vq = &vsock->vqs[i];

                mutex_lock(&vq->mutex);

                if (!vhost_vq_access_ok(vq)) {
                        ret = -EFAULT;
                        goto err_vq;
                }

                if (!vhost_vq_get_backend(vq)) {
                        vhost_vq_set_backend(vq, vsock);
                        ret = vhost_vq_init_access(vq);
                        if (ret)
                                goto err_vq;
                }

                mutex_unlock(&vq->mutex);
        }

        /* Some packets may have been queued before the device was started,
         * let's kick the send worker to send them.
         */
        vhost_vq_work_queue(&vsock->vqs[VSOCK_VQ_RX], &vsock->send_pkt_work);

        mutex_unlock(&vsock->dev.mutex);
        return 0;

err_vq:
        vhost_vq_set_backend(vq, NULL);
        mutex_unlock(&vq->mutex);

        for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
                vq = &vsock->vqs[i];

                mutex_lock(&vq->mutex);
                vhost_vq_set_backend(vq, NULL);
                mutex_unlock(&vq->mutex);
        }
err:
        mutex_unlock(&vsock->dev.mutex);
        return ret;
}

static int vhost_vsock_stop(struct vhost_vsock *vsock, bool check_owner)
{
        size_t i;
        int ret = 0;

        mutex_lock(&vsock->dev.mutex);

        if (check_owner) {
                ret = vhost_dev_check_owner(&vsock->dev);
                if (ret)
                        goto err;
        }

        for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
                struct vhost_virtqueue *vq = &vsock->vqs[i];

                mutex_lock(&vq->mutex);
                vhost_vq_set_backend(vq, NULL);
                mutex_unlock(&vq->mutex);
        }

err:
        mutex_unlock(&vsock->dev.mutex);
        return ret;
}

static void vhost_vsock_free(struct vhost_vsock *vsock)
{
        kvfree(vsock);
}

static int vhost_vsock_dev_open(struct inode *inode, struct file *file)
{
        struct vhost_virtqueue **vqs;
        struct vhost_vsock *vsock;
        int ret;

        /* This struct is large and allocation could fail, fall back to vmalloc
         * if there is no other way.
         */
        vsock = kvmalloc(sizeof(*vsock), GFP_KERNEL | __GFP_RETRY_MAYFAIL);
        if (!vsock)
                return -ENOMEM;

        vqs = kmalloc_array(ARRAY_SIZE(vsock->vqs), sizeof(*vqs), GFP_KERNEL);
        if (!vqs) {
                ret = -ENOMEM;
                goto out;
        }

        vsock->guest_cid = 0; /* no CID assigned yet */
        vsock->seqpacket_allow = false;

        atomic_set(&vsock->queued_replies, 0);

        vqs[VSOCK_VQ_TX] = &vsock->vqs[VSOCK_VQ_TX];
        vqs[VSOCK_VQ_RX] = &vsock->vqs[VSOCK_VQ_RX];
        vsock->vqs[VSOCK_VQ_TX].handle_kick = vhost_vsock_handle_tx_kick;
        vsock->vqs[VSOCK_VQ_RX].handle_kick = vhost_vsock_handle_rx_kick;

        vhost_dev_init(&vsock->dev, vqs, ARRAY_SIZE(vsock->vqs),
                       UIO_MAXIOV, VHOST_VSOCK_PKT_WEIGHT,
                       VHOST_VSOCK_WEIGHT, true, NULL);

        file->private_data = vsock;
        skb_queue_head_init(&vsock->send_pkt_queue);
        vhost_work_init(&vsock->send_pkt_work, vhost_transport_send_pkt_work);
        return 0;

out:
        vhost_vsock_free(vsock);
        return ret;
}

static void vhost_vsock_flush(struct vhost_vsock *vsock)
{
        vhost_dev_flush(&vsock->dev);
}

static void vhost_vsock_reset_orphans(struct sock *sk)
{
        struct vsock_sock *vsk = vsock_sk(sk);

        /* vmci_transport.c doesn't take sk_lock here either.  At least we're
         * under vsock_table_lock so the sock cannot disappear while we're
         * executing.
         */

        /* If the peer is still valid, no need to reset connection */
        if (vhost_vsock_get(vsk->remote_addr.svm_cid))
                return;

        /* If the close timeout is pending, let it expire.  This avoids races
         * with the timeout callback.
         */
        if (vsk->close_work_scheduled)
                return;

        sock_set_flag(sk, SOCK_DONE);
        vsk->peer_shutdown = SHUTDOWN_MASK;
        sk->sk_state = SS_UNCONNECTED;
        sk->sk_err = ECONNRESET;
        sk_error_report(sk);
}

static int vhost_vsock_dev_release(struct inode *inode, struct file *file)
{
        struct vhost_vsock *vsock = file->private_data;

        mutex_lock(&vhost_vsock_mutex);
        if (vsock->guest_cid)
                hash_del_rcu(&vsock->hash);
        mutex_unlock(&vhost_vsock_mutex);

        /* Wait for other CPUs to finish using vsock */
        synchronize_rcu();

        /* Iterating over all connections for all CIDs to find orphans is
         * inefficient.  Room for improvement here. */
        vsock_for_each_connected_socket(&vhost_transport.transport,
                                        vhost_vsock_reset_orphans);

        /* Don't check the owner, because we are in the release path, so we
         * need to stop the vsock device in any case.
         * vhost_vsock_stop() can not fail in this case, so we don't need to
         * check the return code.
         */
        vhost_vsock_stop(vsock, false);
        vhost_vsock_flush(vsock);
        vhost_dev_stop(&vsock->dev);

        virtio_vsock_skb_queue_purge(&vsock->send_pkt_queue);

        vhost_dev_cleanup(&vsock->dev);
        kfree(vsock->dev.vqs);
        vhost_vsock_free(vsock);
        return 0;
}

static int vhost_vsock_set_cid(struct vhost_vsock *vsock, u64 guest_cid)
{
        struct vhost_vsock *other;

        /* Refuse reserved CIDs */
        if (guest_cid <= VMADDR_CID_HOST ||
            guest_cid == U32_MAX)
                return -EINVAL;

        /* 64-bit CIDs are not yet supported */
        if (guest_cid > U32_MAX)
                return -EINVAL;

        /* Refuse if CID is assigned to the guest->host transport (i.e. nested
         * VM), to make the loopback work.
         */
        if (vsock_find_cid(guest_cid))
                return -EADDRINUSE;

        /* Refuse if CID is already in use */
        mutex_lock(&vhost_vsock_mutex);
        other = vhost_vsock_get(guest_cid);
        if (other && other != vsock) {
                mutex_unlock(&vhost_vsock_mutex);
                return -EADDRINUSE;
        }

        if (vsock->guest_cid)
                hash_del_rcu(&vsock->hash);

        vsock->guest_cid = guest_cid;
        hash_add_rcu(vhost_vsock_hash, &vsock->hash, vsock->guest_cid);
        mutex_unlock(&vhost_vsock_mutex);

        return 0;
}

static int vhost_vsock_set_features(struct vhost_vsock *vsock, u64 features)
{
        struct vhost_virtqueue *vq;
        int i;

        if (features & ~VHOST_VSOCK_FEATURES)
                return -EOPNOTSUPP;

        mutex_lock(&vsock->dev.mutex);
        if ((features & (1 << VHOST_F_LOG_ALL)) &&
            !vhost_log_access_ok(&vsock->dev)) {
                goto err;
        }

        if ((features & (1ULL << VIRTIO_F_ACCESS_PLATFORM))) {
                if (vhost_init_device_iotlb(&vsock->dev))
                        goto err;
        }

        vsock->seqpacket_allow = features & (1ULL << VIRTIO_VSOCK_F_SEQPACKET);

        for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
                vq = &vsock->vqs[i];
                mutex_lock(&vq->mutex);
                vq->acked_features = features;
                mutex_unlock(&vq->mutex);
        }
        mutex_unlock(&vsock->dev.mutex);
        return 0;

err:
        mutex_unlock(&vsock->dev.mutex);
        return -EFAULT;
}

static long vhost_vsock_dev_ioctl(struct file *f, unsigned int ioctl,
                                  unsigned long arg)
{
        struct vhost_vsock *vsock = f->private_data;
        void __user *argp = (void __user *)arg;
        u64 guest_cid;
        u64 features;
        int start;
        int r;

        switch (ioctl) {
        case VHOST_VSOCK_SET_GUEST_CID:
                if (copy_from_user(&guest_cid, argp, sizeof(guest_cid)))
                        return -EFAULT;
                return vhost_vsock_set_cid(vsock, guest_cid);
        case VHOST_VSOCK_SET_RUNNING:
                if (copy_from_user(&start, argp, sizeof(start)))
                        return -EFAULT;
                if (start)
                        return vhost_vsock_start(vsock);
                else
                        return vhost_vsock_stop(vsock, true);
        case VHOST_GET_FEATURES:
                features = VHOST_VSOCK_FEATURES;
                if (copy_to_user(argp, &features, sizeof(features)))
                        return -EFAULT;
                return 0;
        case VHOST_SET_FEATURES:
                if (copy_from_user(&features, argp, sizeof(features)))
                        return -EFAULT;
                return vhost_vsock_set_features(vsock, features);
        case VHOST_GET_BACKEND_FEATURES:
                features = VHOST_VSOCK_BACKEND_FEATURES;
                if (copy_to_user(argp, &features, sizeof(features)))
                        return -EFAULT;
                return 0;
        case VHOST_SET_BACKEND_FEATURES:
                if (copy_from_user(&features, argp, sizeof(features)))
                        return -EFAULT;
                if (features & ~VHOST_VSOCK_BACKEND_FEATURES)
                        return -EOPNOTSUPP;
                vhost_set_backend_features(&vsock->dev, features);
                return 0;
        default:
                mutex_lock(&vsock->dev.mutex);
                r = vhost_dev_ioctl(&vsock->dev, ioctl, argp);
                if (r == -ENOIOCTLCMD)
                        r = vhost_vring_ioctl(&vsock->dev, ioctl, argp);
                else
                        vhost_vsock_flush(vsock);
                mutex_unlock(&vsock->dev.mutex);
                return r;
        }
}

static ssize_t vhost_vsock_chr_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
        struct file *file = iocb->ki_filp;
        struct vhost_vsock *vsock = file->private_data;
        struct vhost_dev *dev = &vsock->dev;
        int noblock = file->f_flags & O_NONBLOCK;

        return vhost_chr_read_iter(dev, to, noblock);
}

static ssize_t vhost_vsock_chr_write_iter(struct kiocb *iocb,
                                        struct iov_iter *from)
{
        struct file *file = iocb->ki_filp;
        struct vhost_vsock *vsock = file->private_data;
        struct vhost_dev *dev = &vsock->dev;

        return vhost_chr_write_iter(dev, from);
}

static __poll_t vhost_vsock_chr_poll(struct file *file, poll_table *wait)
{
        struct vhost_vsock *vsock = file->private_data;
        struct vhost_dev *dev = &vsock->dev;

        return vhost_chr_poll(file, dev, wait);
}

static const struct file_operations vhost_vsock_fops = {
        .owner          = THIS_MODULE,
        .open           = vhost_vsock_dev_open,
        .release        = vhost_vsock_dev_release,
        .llseek                = noop_llseek,
        .unlocked_ioctl = vhost_vsock_dev_ioctl,
        .compat_ioctl   = compat_ptr_ioctl,
        .read_iter      = vhost_vsock_chr_read_iter,
        .write_iter     = vhost_vsock_chr_write_iter,
        .poll           = vhost_vsock_chr_poll,
};

static struct miscdevice vhost_vsock_misc = {
        .minor = VHOST_VSOCK_MINOR,
        .name = "vhost-vsock",
        .fops = &vhost_vsock_fops,
};

static int __init vhost_vsock_init(void)
{
        int ret;

        ret = vsock_core_register(&vhost_transport.transport,
                                  VSOCK_TRANSPORT_F_H2G);
        if (ret < 0)
                return ret;

        ret = misc_register(&vhost_vsock_misc);
        if (ret) {
                vsock_core_unregister(&vhost_transport.transport);
                return ret;
        }

        return 0;
};

static void __exit vhost_vsock_exit(void)
{
        misc_deregister(&vhost_vsock_misc);
        vsock_core_unregister(&vhost_transport.transport);
};

module_init(vhost_vsock_init);
module_exit(vhost_vsock_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Asias He");
MODULE_DESCRIPTION("vhost transport for vsock ");
MODULE_ALIAS_MISCDEV(VHOST_VSOCK_MINOR);
MODULE_ALIAS("devname:vhost-vsock");

































    6 
    9 





    8 






   11 









   12 
















    2 
    1 

    1 









   13 




   13 









   11 








   12 




1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
 * Helper functions for BLAKE2b implementations.
 * Keep this in sync with the corresponding BLAKE2s header.
 */

#ifndef _CRYPTO_INTERNAL_BLAKE2B_H
#define _CRYPTO_INTERNAL_BLAKE2B_H

#include <crypto/blake2b.h>
#include <crypto/internal/hash.h>
#include <linux/string.h>

void blake2b_compress_generic(struct blake2b_state *state,
                              const u8 *block, size_t nblocks, u32 inc);

static inline void blake2b_set_lastblock(struct blake2b_state *state)
{
        state->f[0] = -1;
}

typedef void (*blake2b_compress_t)(struct blake2b_state *state,
                                   const u8 *block, size_t nblocks, u32 inc);

static inline void __blake2b_update(struct blake2b_state *state,
                                    const u8 *in, size_t inlen,
                                    blake2b_compress_t compress)
{
        const size_t fill = BLAKE2B_BLOCK_SIZE - state->buflen;

        if (unlikely(!inlen))
                return;
        if (inlen > fill) {
                memcpy(state->buf + state->buflen, in, fill);
                (*compress)(state, state->buf, 1, BLAKE2B_BLOCK_SIZE);
                state->buflen = 0;
                in += fill;
                inlen -= fill;
        }
        if (inlen > BLAKE2B_BLOCK_SIZE) {
                const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2B_BLOCK_SIZE);
                /* Hash one less (full) block than strictly possible */
                (*compress)(state, in, nblocks - 1, BLAKE2B_BLOCK_SIZE);
                in += BLAKE2B_BLOCK_SIZE * (nblocks - 1);
                inlen -= BLAKE2B_BLOCK_SIZE * (nblocks - 1);
        }
        memcpy(state->buf + state->buflen, in, inlen);
        state->buflen += inlen;
}

static inline void __blake2b_final(struct blake2b_state *state, u8 *out,
                                   blake2b_compress_t compress)
{
        int i;

        blake2b_set_lastblock(state);
        memset(state->buf + state->buflen, 0,
               BLAKE2B_BLOCK_SIZE - state->buflen); /* Padding */
        (*compress)(state, state->buf, 1, state->buflen);
        for (i = 0; i < ARRAY_SIZE(state->h); i++)
                __cpu_to_le64s(&state->h[i]);
        memcpy(out, state->h, state->outlen);
}

/* Helper functions for shash implementations of BLAKE2b */

struct blake2b_tfm_ctx {
        u8 key[BLAKE2B_KEY_SIZE];
        unsigned int keylen;
};

static inline int crypto_blake2b_setkey(struct crypto_shash *tfm,
                                        const u8 *key, unsigned int keylen)
{
        struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);

        if (keylen == 0 || keylen > BLAKE2B_KEY_SIZE)
                return -EINVAL;

        memcpy(tctx->key, key, keylen);
        tctx->keylen = keylen;

        return 0;
}

static inline int crypto_blake2b_init(struct shash_desc *desc)
{
        const struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
        struct blake2b_state *state = shash_desc_ctx(desc);
        unsigned int outlen = crypto_shash_digestsize(desc->tfm);

        __blake2b_init(state, outlen, tctx->key, tctx->keylen);
        return 0;
}

static inline int crypto_blake2b_update(struct shash_desc *desc,
                                        const u8 *in, unsigned int inlen,
                                        blake2b_compress_t compress)
{
        struct blake2b_state *state = shash_desc_ctx(desc);

        __blake2b_update(state, in, inlen, compress);
        return 0;
}

static inline int crypto_blake2b_final(struct shash_desc *desc, u8 *out,
                                       blake2b_compress_t compress)
{
        struct blake2b_state *state = shash_desc_ctx(desc);

        __blake2b_final(state, out, compress);
        return 0;
}

#endif /* _CRYPTO_INTERNAL_BLAKE2B_H */
































  390 




  386 














1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LINUX_COOKIE_H
#define __LINUX_COOKIE_H

#include <linux/atomic.h>
#include <linux/percpu.h>
#include <asm/local.h>

struct pcpu_gen_cookie {
        local_t nesting;
        u64 last;
} __aligned(16);

struct gen_cookie {
        struct pcpu_gen_cookie __percpu *local;
        atomic64_t forward_last ____cacheline_aligned_in_smp;
        atomic64_t reverse_last;
};

#define COOKIE_LOCAL_BATCH        4096

#define DEFINE_COOKIE(name)                                                \
        static DEFINE_PER_CPU(struct pcpu_gen_cookie, __##name);        \
        static struct gen_cookie name = {                                \
                .local                = &__##name,                                \
                .forward_last        = ATOMIC64_INIT(0),                        \
                .reverse_last        = ATOMIC64_INIT(0),                        \
        }

static __always_inline u64 gen_cookie_next(struct gen_cookie *gc)
{
        struct pcpu_gen_cookie *local = this_cpu_ptr(gc->local);
        u64 val;

        if (likely(local_inc_return(&local->nesting) == 1)) {
                val = local->last;
                if (__is_defined(CONFIG_SMP) &&
                    unlikely((val & (COOKIE_LOCAL_BATCH - 1)) == 0)) {
                        s64 next = atomic64_add_return(COOKIE_LOCAL_BATCH,
                                                       &gc->forward_last);
                        val = next - COOKIE_LOCAL_BATCH;
                }
                local->last = ++val;
        } else {
                val = atomic64_dec_return(&gc->reverse_last);
        }
        local_dec(&local->nesting);
        return val;
}

#endif /* __LINUX_COOKIE_H */
















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
/* SPDX-License-Identifier: GPL-2.0 */
/*
 *
 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
 *
 * on-disk ntfs structs
 */

// clang-format off
#ifndef _LINUX_NTFS3_NTFS_H
#define _LINUX_NTFS3_NTFS_H

#include <linux/blkdev.h>
#include <linux/build_bug.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/types.h>

#include "debug.h"

/* TODO: Check 4K MFT record and 512 bytes cluster. */

/* Check each run for marked clusters. */
#define NTFS3_CHECK_FREE_CLST

#define NTFS_NAME_LEN 255

/*
 * ntfs.sys used 500 maximum links on-disk struct allows up to 0xffff.
 * xfstest generic/041 creates 3003 hardlinks.
 */
#define NTFS_LINK_MAX 4000

/*
 * Activate to use 64 bit clusters instead of 32 bits in ntfs.sys.
 * Logical and virtual cluster number if needed, may be
 * redefined to use 64 bit value.
 */
//#define CONFIG_NTFS3_64BIT_CLUSTER

#define NTFS_LZNT_MAX_CLUSTER        4096
#define NTFS_LZNT_CUNIT                4
#define NTFS_LZNT_CLUSTERS        (1u<<NTFS_LZNT_CUNIT)

struct GUID {
        __le32 Data1;
        __le16 Data2;
        __le16 Data3;
        u8 Data4[8];
};

/*
 * This struct repeats layout of ATTR_FILE_NAME
 * at offset 0x40.
 * It used to store global constants NAME_MFT/NAME_MIRROR...
 * most constant names are shorter than 10.
 */
struct cpu_str {
        u8 len;
        u8 unused;
        u16 name[];
};

struct le_str {
        u8 len;
        u8 unused;
        __le16 name[];
};

static_assert(SECTOR_SHIFT == 9);

#ifdef CONFIG_NTFS3_64BIT_CLUSTER
typedef u64 CLST;
static_assert(sizeof(size_t) == 8);
#else
typedef u32 CLST;
#endif

#define SPARSE_LCN64   ((u64)-1)
#define SPARSE_LCN     ((CLST)-1)
#define RESIDENT_LCN   ((CLST)-2)
#define COMPRESSED_LCN ((CLST)-3)

enum RECORD_NUM {
        MFT_REC_MFT                = 0,
        MFT_REC_MIRR                = 1,
        MFT_REC_LOG                = 2,
        MFT_REC_VOL                = 3,
        MFT_REC_ATTR                = 4,
        MFT_REC_ROOT                = 5,
        MFT_REC_BITMAP                = 6,
        MFT_REC_BOOT                = 7,
        MFT_REC_BADCLUST        = 8,
        MFT_REC_SECURE                = 9,
        MFT_REC_UPCASE                = 10,
        MFT_REC_EXTEND                = 11,
        MFT_REC_RESERVED        = 12,
        MFT_REC_FREE                = 16,
        MFT_REC_USER                = 24,
};

enum ATTR_TYPE {
        ATTR_ZERO                = cpu_to_le32(0x00),
        ATTR_STD                = cpu_to_le32(0x10),
        ATTR_LIST                = cpu_to_le32(0x20),
        ATTR_NAME                = cpu_to_le32(0x30),
        ATTR_ID                        = cpu_to_le32(0x40),
        ATTR_SECURE                = cpu_to_le32(0x50),
        ATTR_LABEL                = cpu_to_le32(0x60),
        ATTR_VOL_INFO                = cpu_to_le32(0x70),
        ATTR_DATA                = cpu_to_le32(0x80),
        ATTR_ROOT                = cpu_to_le32(0x90),
        ATTR_ALLOC                = cpu_to_le32(0xA0),
        ATTR_BITMAP                = cpu_to_le32(0xB0),
        ATTR_REPARSE                = cpu_to_le32(0xC0),
        ATTR_EA_INFO                = cpu_to_le32(0xD0),
        ATTR_EA                        = cpu_to_le32(0xE0),
        ATTR_PROPERTYSET        = cpu_to_le32(0xF0),
        ATTR_LOGGED_UTILITY_STREAM = cpu_to_le32(0x100),
        ATTR_END                = cpu_to_le32(0xFFFFFFFF)
};

static_assert(sizeof(enum ATTR_TYPE) == 4);

enum FILE_ATTRIBUTE {
        FILE_ATTRIBUTE_READONLY                = cpu_to_le32(0x00000001),
        FILE_ATTRIBUTE_HIDDEN                = cpu_to_le32(0x00000002),
        FILE_ATTRIBUTE_SYSTEM                = cpu_to_le32(0x00000004),
        FILE_ATTRIBUTE_ARCHIVE                = cpu_to_le32(0x00000020),
        FILE_ATTRIBUTE_DEVICE                = cpu_to_le32(0x00000040),
        FILE_ATTRIBUTE_TEMPORARY        = cpu_to_le32(0x00000100),
        FILE_ATTRIBUTE_SPARSE_FILE        = cpu_to_le32(0x00000200),
        FILE_ATTRIBUTE_REPARSE_POINT        = cpu_to_le32(0x00000400),
        FILE_ATTRIBUTE_COMPRESSED        = cpu_to_le32(0x00000800),
        FILE_ATTRIBUTE_OFFLINE                = cpu_to_le32(0x00001000),
        FILE_ATTRIBUTE_NOT_CONTENT_INDEXED = cpu_to_le32(0x00002000),
        FILE_ATTRIBUTE_ENCRYPTED        = cpu_to_le32(0x00004000),
        FILE_ATTRIBUTE_VALID_FLAGS        = cpu_to_le32(0x00007fb7),
        FILE_ATTRIBUTE_DIRECTORY        = cpu_to_le32(0x10000000),
        FILE_ATTRIBUTE_INDEX                = cpu_to_le32(0x20000000)
};

static_assert(sizeof(enum FILE_ATTRIBUTE) == 4);

extern const struct cpu_str NAME_MFT;
extern const struct cpu_str NAME_MIRROR;
extern const struct cpu_str NAME_LOGFILE;
extern const struct cpu_str NAME_VOLUME;
extern const struct cpu_str NAME_ATTRDEF;
extern const struct cpu_str NAME_ROOT;
extern const struct cpu_str NAME_BITMAP;
extern const struct cpu_str NAME_BOOT;
extern const struct cpu_str NAME_BADCLUS;
extern const struct cpu_str NAME_QUOTA;
extern const struct cpu_str NAME_SECURE;
extern const struct cpu_str NAME_UPCASE;
extern const struct cpu_str NAME_EXTEND;
extern const struct cpu_str NAME_OBJID;
extern const struct cpu_str NAME_REPARSE;
extern const struct cpu_str NAME_USNJRNL;

extern const __le16 I30_NAME[4];
extern const __le16 SII_NAME[4];
extern const __le16 SDH_NAME[4];
extern const __le16 SO_NAME[2];
extern const __le16 SQ_NAME[2];
extern const __le16 SR_NAME[2];

extern const __le16 BAD_NAME[4];
extern const __le16 SDS_NAME[4];
extern const __le16 WOF_NAME[17];        /* WofCompressedData */

/* MFT record number structure. */
struct MFT_REF {
        __le32 low;        // The low part of the number.
        __le16 high;        // The high part of the number.
        __le16 seq;        // The sequence number of MFT record.
};

static_assert(sizeof(__le64) == sizeof(struct MFT_REF));

static inline CLST ino_get(const struct MFT_REF *ref)
{
#ifdef CONFIG_NTFS3_64BIT_CLUSTER
        return le32_to_cpu(ref->low) | ((u64)le16_to_cpu(ref->high) << 32);
#else
        return le32_to_cpu(ref->low);
#endif
}

struct NTFS_BOOT {
        u8 jump_code[3];        // 0x00: Jump to boot code.
        u8 system_id[8];        // 0x03: System ID, equals "NTFS    "

        // NOTE: This member is not aligned(!)
        // bytes_per_sector[0] must be 0.
        // bytes_per_sector[1] must be multiplied by 256.
        u8 bytes_per_sector[2];        // 0x0B: Bytes per sector.

        u8 sectors_per_clusters;// 0x0D: Sectors per cluster.
        u8 unused1[7];
        u8 media_type;                // 0x15: Media type (0xF8 - harddisk)
        u8 unused2[2];
        __le16 sct_per_track;        // 0x18: number of sectors per track.
        __le16 heads;                // 0x1A: number of heads per cylinder.
        __le32 hidden_sectors;        // 0x1C: number of 'hidden' sectors.
        u8 unused3[4];
        u8 bios_drive_num;        // 0x24: BIOS drive number =0x80.
        u8 unused4;
        u8 signature_ex;        // 0x26: Extended BOOT signature =0x80.
        u8 unused5;
        __le64 sectors_per_volume;// 0x28: Size of volume in sectors.
        __le64 mft_clst;        // 0x30: First cluster of $MFT
        __le64 mft2_clst;        // 0x38: First cluster of $MFTMirr
        s8 record_size;                // 0x40: Size of MFT record in clusters(sectors).
        u8 unused6[3];
        s8 index_size;                // 0x44: Size of INDX record in clusters(sectors).
        u8 unused7[3];
        __le64 serial_num;        // 0x48: Volume serial number
        __le32 check_sum;        // 0x50: Simple additive checksum of all
                                // of the u32's which precede the 'check_sum'.

        u8 boot_code[0x200 - 0x50 - 2 - 4]; // 0x54:
        u8 boot_magic[2];        // 0x1FE: Boot signature =0x55 + 0xAA
};

static_assert(sizeof(struct NTFS_BOOT) == 0x200);

enum NTFS_SIGNATURE {
        NTFS_FILE_SIGNATURE = cpu_to_le32(0x454C4946), // 'FILE'
        NTFS_INDX_SIGNATURE = cpu_to_le32(0x58444E49), // 'INDX'
        NTFS_CHKD_SIGNATURE = cpu_to_le32(0x444B4843), // 'CHKD'
        NTFS_RSTR_SIGNATURE = cpu_to_le32(0x52545352), // 'RSTR'
        NTFS_RCRD_SIGNATURE = cpu_to_le32(0x44524352), // 'RCRD'
        NTFS_BAAD_SIGNATURE = cpu_to_le32(0x44414142), // 'BAAD'
        NTFS_HOLE_SIGNATURE = cpu_to_le32(0x454C4F48), // 'HOLE'
        NTFS_FFFF_SIGNATURE = cpu_to_le32(0xffffffff),
};

static_assert(sizeof(enum NTFS_SIGNATURE) == 4);

/* MFT Record header structure. */
struct NTFS_RECORD_HEADER {
        /* Record magic number, equals 'FILE'/'INDX'/'RSTR'/'RCRD'. */
        enum NTFS_SIGNATURE sign; // 0x00:
        __le16 fix_off;                // 0x04:
        __le16 fix_num;                // 0x06:
        __le64 lsn;                // 0x08: Log file sequence number,
};

static_assert(sizeof(struct NTFS_RECORD_HEADER) == 0x10);

static inline int is_baad(const struct NTFS_RECORD_HEADER *hdr)
{
        return hdr->sign == NTFS_BAAD_SIGNATURE;
}

/* Possible bits in struct MFT_REC.flags. */
enum RECORD_FLAG {
        RECORD_FLAG_IN_USE        = cpu_to_le16(0x0001),
        RECORD_FLAG_DIR                = cpu_to_le16(0x0002),
        RECORD_FLAG_SYSTEM        = cpu_to_le16(0x0004),
        RECORD_FLAG_INDEX        = cpu_to_le16(0x0008),
};

/* MFT Record structure. */
struct MFT_REC {
        struct NTFS_RECORD_HEADER rhdr; // 'FILE'

        __le16 seq;                // 0x10: Sequence number for this record.
        __le16 hard_links;        // 0x12: The number of hard links to record.
        __le16 attr_off;        // 0x14: Offset to attributes.
        __le16 flags;                // 0x16: See RECORD_FLAG.
        __le32 used;                // 0x18: The size of used part.
        __le32 total;                // 0x1C: Total record size.

        struct MFT_REF parent_ref; // 0x20: Parent MFT record.
        __le16 next_attr_id;        // 0x28: The next attribute Id.

        __le16 res;                // 0x2A: High part of MFT record?
        __le32 mft_record;        // 0x2C: Current MFT record number.
        __le16 fixups[];        // 0x30:
};

#define MFTRECORD_FIXUP_OFFSET_1 offsetof(struct MFT_REC, res)
#define MFTRECORD_FIXUP_OFFSET_3 offsetof(struct MFT_REC, fixups)
/*
 * define MFTRECORD_FIXUP_OFFSET as MFTRECORD_FIXUP_OFFSET_3 (0x30)
 * to format new mft records with bigger header (as current ntfs.sys does)
 *
 * define MFTRECORD_FIXUP_OFFSET as MFTRECORD_FIXUP_OFFSET_1 (0x2A)
 * to format new mft records with smaller header (as old ntfs.sys did)
 * Both variants are valid.
 */
#define MFTRECORD_FIXUP_OFFSET  MFTRECORD_FIXUP_OFFSET_1

static_assert(MFTRECORD_FIXUP_OFFSET_1 == 0x2A);
static_assert(MFTRECORD_FIXUP_OFFSET_3 == 0x30);

static inline bool is_rec_base(const struct MFT_REC *rec)
{
        const struct MFT_REF *r = &rec->parent_ref;

        return !r->low && !r->high && !r->seq;
}

static inline bool is_mft_rec5(const struct MFT_REC *rec)
{
        return le16_to_cpu(rec->rhdr.fix_off) >=
               offsetof(struct MFT_REC, fixups);
}

static inline bool is_rec_inuse(const struct MFT_REC *rec)
{
        return rec->flags & RECORD_FLAG_IN_USE;
}

static inline bool clear_rec_inuse(struct MFT_REC *rec)
{
        return rec->flags &= ~RECORD_FLAG_IN_USE;
}

/* Possible values of ATTR_RESIDENT.flags */
#define RESIDENT_FLAG_INDEXED 0x01

struct ATTR_RESIDENT {
        __le32 data_size;        // 0x10: The size of data.
        __le16 data_off;        // 0x14: Offset to data.
        u8 flags;                // 0x16: Resident flags ( 1 - indexed ).
        u8 res;                        // 0x17:
}; // sizeof() = 0x18

struct ATTR_NONRESIDENT {
        __le64 svcn;                // 0x10: Starting VCN of this segment.
        __le64 evcn;                // 0x18: End VCN of this segment.
        __le16 run_off;                // 0x20: Offset to packed runs.
        // Unit of Compression size for this stream, expressed
        // as a log of the cluster size.
        //
        // 0 means file is not compressed
        // 1, 2, 3, and 4 are potentially legal values if the
        // stream is compressed, however the implementation
        // may only choose to use 4, or possibly 3.
        // Note that 4 means cluster size time 16.
        // If convenient the implementation may wish to accept a
        // reasonable range of legal values here (1-5?),
        // even if the implementation only generates
        // a smaller set of values itself.
        u8 c_unit;                // 0x22:
        u8 res1[5];                // 0x23:
        __le64 alloc_size;        // 0x28: The allocated size of attribute in bytes.
                                // (multiple of cluster size)
        __le64 data_size;        // 0x30: The size of attribute  in bytes <= alloc_size.
        __le64 valid_size;        // 0x38: The size of valid part in bytes <= data_size.
        __le64 total_size;        // 0x40: The sum of the allocated clusters for a file.
                                // (present only for the first segment (0 == vcn)
                                // of compressed attribute)

}; // sizeof()=0x40 or 0x48 (if compressed)

/* Possible values of ATTRIB.flags: */
#define ATTR_FLAG_COMPRESSED          cpu_to_le16(0x0001)
#define ATTR_FLAG_COMPRESSED_MASK cpu_to_le16(0x00FF)
#define ATTR_FLAG_ENCRYPTED          cpu_to_le16(0x4000)
#define ATTR_FLAG_SPARSED          cpu_to_le16(0x8000)

struct ATTRIB {
        enum ATTR_TYPE type;        // 0x00: The type of this attribute.
        __le32 size;                // 0x04: The size of this attribute.
        u8 non_res;                // 0x08: Is this attribute non-resident?
        u8 name_len;                // 0x09: This attribute name length.
        __le16 name_off;        // 0x0A: Offset to the attribute name.
        __le16 flags;                // 0x0C: See ATTR_FLAG_XXX.
        __le16 id;                // 0x0E: Unique id (per record).

        union {
                struct ATTR_RESIDENT res;     // 0x10
                struct ATTR_NONRESIDENT nres; // 0x10
        };
};

/* Define attribute sizes. */
#define SIZEOF_RESIDENT                        0x18
#define SIZEOF_NONRESIDENT_EX                0x48
#define SIZEOF_NONRESIDENT                0x40

#define SIZEOF_RESIDENT_LE                cpu_to_le16(0x18)
#define SIZEOF_NONRESIDENT_EX_LE        cpu_to_le16(0x48)
#define SIZEOF_NONRESIDENT_LE                cpu_to_le16(0x40)

static inline u64 attr_ondisk_size(const struct ATTRIB *attr)
{
        return attr->non_res ? ((attr->flags &
                                 (ATTR_FLAG_COMPRESSED | ATTR_FLAG_SPARSED)) ?
                                        le64_to_cpu(attr->nres.total_size) :
                                        le64_to_cpu(attr->nres.alloc_size))
                             : ALIGN(le32_to_cpu(attr->res.data_size), 8);
}

static inline u64 attr_size(const struct ATTRIB *attr)
{
        return attr->non_res ? le64_to_cpu(attr->nres.data_size) :
                               le32_to_cpu(attr->res.data_size);
}

static inline bool is_attr_encrypted(const struct ATTRIB *attr)
{
        return attr->flags & ATTR_FLAG_ENCRYPTED;
}

static inline bool is_attr_sparsed(const struct ATTRIB *attr)
{
        return attr->flags & ATTR_FLAG_SPARSED;
}

static inline bool is_attr_compressed(const struct ATTRIB *attr)
{
        return attr->flags & ATTR_FLAG_COMPRESSED;
}

static inline bool is_attr_ext(const struct ATTRIB *attr)
{
        return attr->flags & (ATTR_FLAG_SPARSED | ATTR_FLAG_COMPRESSED);
}

static inline bool is_attr_indexed(const struct ATTRIB *attr)
{
        return !attr->non_res && (attr->res.flags & RESIDENT_FLAG_INDEXED);
}

static inline __le16 const *attr_name(const struct ATTRIB *attr)
{
        return Add2Ptr(attr, le16_to_cpu(attr->name_off));
}

static inline u64 attr_svcn(const struct ATTRIB *attr)
{
        return attr->non_res ? le64_to_cpu(attr->nres.svcn) : 0;
}

static_assert(sizeof(struct ATTRIB) == 0x48);
static_assert(sizeof(((struct ATTRIB *)NULL)->res) == 0x08);
static_assert(sizeof(((struct ATTRIB *)NULL)->nres) == 0x38);

static inline void *resident_data_ex(const struct ATTRIB *attr, u32 datasize)
{
        u32 asize, rsize;
        u16 off;

        if (attr->non_res)
                return NULL;

        asize = le32_to_cpu(attr->size);
        off = le16_to_cpu(attr->res.data_off);

        if (asize < datasize + off)
                return NULL;

        rsize = le32_to_cpu(attr->res.data_size);
        if (rsize < datasize)
                return NULL;

        return Add2Ptr(attr, off);
}

static inline void *resident_data(const struct ATTRIB *attr)
{
        return Add2Ptr(attr, le16_to_cpu(attr->res.data_off));
}

static inline void *attr_run(const struct ATTRIB *attr)
{
        return Add2Ptr(attr, le16_to_cpu(attr->nres.run_off));
}

/* Standard information attribute (0x10). */
struct ATTR_STD_INFO {
        __le64 cr_time;                // 0x00: File creation file.
        __le64 m_time;                // 0x08: File modification time.
        __le64 c_time;                // 0x10: Last time any attribute was modified.
        __le64 a_time;                // 0x18: File last access time.
        enum FILE_ATTRIBUTE fa;        // 0x20: Standard DOS attributes & more.
        __le32 max_ver_num;        // 0x24: Maximum Number of Versions.
        __le32 ver_num;                // 0x28: Version Number.
        __le32 class_id;        // 0x2C: Class Id from bidirectional Class Id index.
};

static_assert(sizeof(struct ATTR_STD_INFO) == 0x30);

#define SECURITY_ID_INVALID 0x00000000
#define SECURITY_ID_FIRST 0x00000100

struct ATTR_STD_INFO5 {
        __le64 cr_time;                // 0x00: File creation file.
        __le64 m_time;                // 0x08: File modification time.
        __le64 c_time;                // 0x10: Last time any attribute was modified.
        __le64 a_time;                // 0x18: File last access time.
        enum FILE_ATTRIBUTE fa;        // 0x20: Standard DOS attributes & more.
        __le32 max_ver_num;        // 0x24: Maximum Number of Versions.
        __le32 ver_num;                // 0x28: Version Number.
        __le32 class_id;        // 0x2C: Class Id from bidirectional Class Id index.

        __le32 owner_id;        // 0x30: Owner Id of the user owning the file.
        __le32 security_id;        // 0x34: The Security Id is a key in the $SII Index and $SDS.
        __le64 quota_charge;        // 0x38:
        __le64 usn;                // 0x40: Last Update Sequence Number of the file. This is a direct
                                // index into the file $UsnJrnl. If zero, the USN Journal is
                                // disabled.
};

static_assert(sizeof(struct ATTR_STD_INFO5) == 0x48);

/* Attribute list entry structure (0x20) */
struct ATTR_LIST_ENTRY {
        enum ATTR_TYPE type;        // 0x00: The type of attribute.
        __le16 size;                // 0x04: The size of this record.
        u8 name_len;                // 0x06: The length of attribute name.
        u8 name_off;                // 0x07: The offset to attribute name.
        __le64 vcn;                // 0x08: Starting VCN of this attribute.
        struct MFT_REF ref;        // 0x10: MFT record number with attribute.
        __le16 id;                // 0x18: struct ATTRIB ID.
        __le16 name[];                // 0x1A: To get real name use name_off.

}; // sizeof(0x20)

static inline u32 le_size(u8 name_len)
{
        return ALIGN(offsetof(struct ATTR_LIST_ENTRY, name) +
                     name_len * sizeof(short), 8);
}

/* Returns 0 if 'attr' has the same type and name. */
static inline int le_cmp(const struct ATTR_LIST_ENTRY *le,
                         const struct ATTRIB *attr)
{
        return le->type != attr->type || le->name_len != attr->name_len ||
               (!le->name_len &&
                memcmp(Add2Ptr(le, le->name_off),
                       Add2Ptr(attr, le16_to_cpu(attr->name_off)),
                       le->name_len * sizeof(short)));
}

static inline __le16 const *le_name(const struct ATTR_LIST_ENTRY *le)
{
        return Add2Ptr(le, le->name_off);
}

/* File name types (the field type in struct ATTR_FILE_NAME). */
#define FILE_NAME_POSIX   0
#define FILE_NAME_UNICODE 1
#define FILE_NAME_DOS          2
#define FILE_NAME_UNICODE_AND_DOS (FILE_NAME_DOS | FILE_NAME_UNICODE)

/* Filename attribute structure (0x30). */
struct NTFS_DUP_INFO {
        __le64 cr_time;                // 0x00: File creation file.
        __le64 m_time;                // 0x08: File modification time.
        __le64 c_time;                // 0x10: Last time any attribute was modified.
        __le64 a_time;                // 0x18: File last access time.
        __le64 alloc_size;        // 0x20: Data attribute allocated size, multiple of cluster size.
        __le64 data_size;        // 0x28: Data attribute size <= Dataalloc_size.
        enum FILE_ATTRIBUTE fa;        // 0x30: Standard DOS attributes & more.
        __le16 ea_size;                // 0x34: Packed EAs.
        __le16 reparse;                // 0x36: Used by Reparse.

}; // 0x38

struct ATTR_FILE_NAME {
        struct MFT_REF home;        // 0x00: MFT record for directory.
        struct NTFS_DUP_INFO dup;// 0x08:
        u8 name_len;                // 0x40: File name length in words.
        u8 type;                // 0x41: File name type.
        __le16 name[];                // 0x42: File name.
};

static_assert(sizeof(((struct ATTR_FILE_NAME *)NULL)->dup) == 0x38);
static_assert(offsetof(struct ATTR_FILE_NAME, name) == 0x42);
#define SIZEOF_ATTRIBUTE_FILENAME     0x44
#define SIZEOF_ATTRIBUTE_FILENAME_MAX (0x42 + 255 * 2)

static inline struct ATTRIB *attr_from_name(struct ATTR_FILE_NAME *fname)
{
        return (struct ATTRIB *)((char *)fname - SIZEOF_RESIDENT);
}

static inline u16 fname_full_size(const struct ATTR_FILE_NAME *fname)
{
        /* Don't return struct_size(fname, name, fname->name_len); */
        return offsetof(struct ATTR_FILE_NAME, name) +
               fname->name_len * sizeof(short);
}

static inline u8 paired_name(u8 type)
{
        if (type == FILE_NAME_UNICODE)
                return FILE_NAME_DOS;
        if (type == FILE_NAME_DOS)
                return FILE_NAME_UNICODE;
        return FILE_NAME_POSIX;
}

/* Index entry defines ( the field flags in NtfsDirEntry ). */
#define NTFS_IE_HAS_SUBNODES        cpu_to_le16(1)
#define NTFS_IE_LAST                cpu_to_le16(2)

/* Directory entry structure. */
struct NTFS_DE {
        union {
                struct MFT_REF ref; // 0x00: MFT record number with this file.
                struct {
                        __le16 data_off;  // 0x00:
                        __le16 data_size; // 0x02:
                        __le32 res;          // 0x04: Must be 0.
                } view;
        };
        __le16 size;                // 0x08: The size of this entry.
        __le16 key_size;        // 0x0A: The size of File name length in bytes + 0x42.
        __le16 flags;                // 0x0C: Entry flags: NTFS_IE_XXX.
        __le16 res;                // 0x0E:

        // Here any indexed attribute can be placed.
        // One of them is:
        // struct ATTR_FILE_NAME AttrFileName;
        //

        // The last 8 bytes of this structure contains
        // the VBN of subnode.
        // !!! Note !!!
        // This field is presented only if (flags & NTFS_IE_HAS_SUBNODES)
        // __le64 vbn;
};

static_assert(sizeof(struct NTFS_DE) == 0x10);

static inline void de_set_vbn_le(struct NTFS_DE *e, __le64 vcn)
{
        __le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));

        *v = vcn;
}

static inline void de_set_vbn(struct NTFS_DE *e, CLST vcn)
{
        __le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));

        *v = cpu_to_le64(vcn);
}

static inline __le64 de_get_vbn_le(const struct NTFS_DE *e)
{
        return *(__le64 *)Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));
}

static inline CLST de_get_vbn(const struct NTFS_DE *e)
{
        __le64 *v = Add2Ptr(e, le16_to_cpu(e->size) - sizeof(__le64));

        return le64_to_cpu(*v);
}

static inline struct NTFS_DE *de_get_next(const struct NTFS_DE *e)
{
        return Add2Ptr(e, le16_to_cpu(e->size));
}

static inline struct ATTR_FILE_NAME *de_get_fname(const struct NTFS_DE *e)
{
        return le16_to_cpu(e->key_size) >= SIZEOF_ATTRIBUTE_FILENAME ?
                       Add2Ptr(e, sizeof(struct NTFS_DE)) :
                       NULL;
}

static inline bool de_is_last(const struct NTFS_DE *e)
{
        return e->flags & NTFS_IE_LAST;
}

static inline bool de_has_vcn(const struct NTFS_DE *e)
{
        return e->flags & NTFS_IE_HAS_SUBNODES;
}

static inline bool de_has_vcn_ex(const struct NTFS_DE *e)
{
        return (e->flags & NTFS_IE_HAS_SUBNODES) &&
               (u64)(-1) != *((u64 *)Add2Ptr(e, le16_to_cpu(e->size) -
                                                        sizeof(__le64)));
}

#define MAX_BYTES_PER_NAME_ENTRY \
        ALIGN(sizeof(struct NTFS_DE) + \
              offsetof(struct ATTR_FILE_NAME, name) + \
              NTFS_NAME_LEN * sizeof(short), 8)

#define NTFS_INDEX_HDR_HAS_SUBNODES cpu_to_le32(1)

struct INDEX_HDR {
        __le32 de_off;        // 0x00: The offset from the start of this structure
                        // to the first NTFS_DE.
        __le32 used;        // 0x04: The size of this structure plus all
                        // entries (quad-word aligned).
        __le32 total;        // 0x08: The allocated size of for this structure plus all entries.
        __le32 flags;        // 0x0C: 0x00 = Small directory, 0x01 = Large directory.

        //
        // de_off + used <= total
        //
};

static_assert(sizeof(struct INDEX_HDR) == 0x10);

static inline struct NTFS_DE *hdr_first_de(const struct INDEX_HDR *hdr)
{
        u32 de_off = le32_to_cpu(hdr->de_off);
        u32 used = le32_to_cpu(hdr->used);
        struct NTFS_DE *e;
        u16 esize;

        if (de_off >= used || de_off + sizeof(struct NTFS_DE) > used )
                return NULL;

        e = Add2Ptr(hdr, de_off);
        esize = le16_to_cpu(e->size);
        if (esize < sizeof(struct NTFS_DE) || de_off + esize > used)
                return NULL;

        return e;
}

static inline struct NTFS_DE *hdr_next_de(const struct INDEX_HDR *hdr,
                                          const struct NTFS_DE *e)
{
        size_t off = PtrOffset(hdr, e);
        u32 used = le32_to_cpu(hdr->used);
        u16 esize;

        if (off >= used)
                return NULL;

        esize = le16_to_cpu(e->size);

        if (esize < sizeof(struct NTFS_DE) ||
            off + esize + sizeof(struct NTFS_DE) > used)
                return NULL;

        return Add2Ptr(e, esize);
}

static inline bool hdr_has_subnode(const struct INDEX_HDR *hdr)
{
        return hdr->flags & NTFS_INDEX_HDR_HAS_SUBNODES;
}

struct INDEX_BUFFER {
        struct NTFS_RECORD_HEADER rhdr; // 'INDX'
        __le64 vbn; // 0x10: vcn if index >= cluster or vsn id index < cluster
        struct INDEX_HDR ihdr; // 0x18:
};

static_assert(sizeof(struct INDEX_BUFFER) == 0x28);

static inline bool ib_is_empty(const struct INDEX_BUFFER *ib)
{
        const struct NTFS_DE *first = hdr_first_de(&ib->ihdr);

        return !first || de_is_last(first);
}

static inline bool ib_is_leaf(const struct INDEX_BUFFER *ib)
{
        return !(ib->ihdr.flags & NTFS_INDEX_HDR_HAS_SUBNODES);
}

/* Index root structure ( 0x90 ). */
enum COLLATION_RULE {
        NTFS_COLLATION_TYPE_BINARY        = cpu_to_le32(0),
        // $I30
        NTFS_COLLATION_TYPE_FILENAME        = cpu_to_le32(0x01),
        // $SII of $Secure and $Q of Quota
        NTFS_COLLATION_TYPE_UINT        = cpu_to_le32(0x10),
        // $O of Quota
        NTFS_COLLATION_TYPE_SID                = cpu_to_le32(0x11),
        // $SDH of $Secure
        NTFS_COLLATION_TYPE_SECURITY_HASH = cpu_to_le32(0x12),
        // $O of ObjId and "$R" for Reparse
        NTFS_COLLATION_TYPE_UINTS        = cpu_to_le32(0x13)
};

static_assert(sizeof(enum COLLATION_RULE) == 4);

//
struct INDEX_ROOT {
        enum ATTR_TYPE type;        // 0x00: The type of attribute to index on.
        enum COLLATION_RULE rule; // 0x04: The rule.
        __le32 index_block_size;// 0x08: The size of index record.
        u8 index_block_clst;        // 0x0C: The number of clusters or sectors per index.
        u8 res[3];
        struct INDEX_HDR ihdr;        // 0x10:
};

static_assert(sizeof(struct INDEX_ROOT) == 0x20);
static_assert(offsetof(struct INDEX_ROOT, ihdr) == 0x10);

#define VOLUME_FLAG_DIRTY            cpu_to_le16(0x0001)
#define VOLUME_FLAG_RESIZE_LOG_FILE cpu_to_le16(0x0002)

struct VOLUME_INFO {
        __le64 res1;        // 0x00
        u8 major_ver;        // 0x08: NTFS major version number (before .)
        u8 minor_ver;        // 0x09: NTFS minor version number (after .)
        __le16 flags;        // 0x0A: Volume flags, see VOLUME_FLAG_XXX

}; // sizeof=0xC

#define SIZEOF_ATTRIBUTE_VOLUME_INFO 0xc

#define NTFS_LABEL_MAX_LENGTH                (0x100 / sizeof(short))
#define NTFS_ATTR_INDEXABLE                cpu_to_le32(0x00000002)
#define NTFS_ATTR_DUPALLOWED                cpu_to_le32(0x00000004)
#define NTFS_ATTR_MUST_BE_INDEXED        cpu_to_le32(0x00000010)
#define NTFS_ATTR_MUST_BE_NAMED                cpu_to_le32(0x00000020)
#define NTFS_ATTR_MUST_BE_RESIDENT        cpu_to_le32(0x00000040)
#define NTFS_ATTR_LOG_ALWAYS                cpu_to_le32(0x00000080)

/* $AttrDef file entry. */
struct ATTR_DEF_ENTRY {
        __le16 name[0x40];        // 0x00: Attr name.
        enum ATTR_TYPE type;        // 0x80: struct ATTRIB type.
        __le32 res;                // 0x84:
        enum COLLATION_RULE rule; // 0x88:
        __le32 flags;                // 0x8C: NTFS_ATTR_XXX (see above).
        __le64 min_sz;                // 0x90: Minimum attribute data size.
        __le64 max_sz;                // 0x98: Maximum attribute data size.
};

static_assert(sizeof(struct ATTR_DEF_ENTRY) == 0xa0);

/* Object ID (0x40) */
struct OBJECT_ID {
        struct GUID ObjId;        // 0x00: Unique Id assigned to file.

        // Birth Volume Id is the Object Id of the Volume on.
        // which the Object Id was allocated. It never changes.
        struct GUID BirthVolumeId; //0x10:

        // Birth Object Id is the first Object Id that was
        // ever assigned to this MFT Record. I.e. If the Object Id
        // is changed for some reason, this field will reflect the
        // original value of the Object Id.
        struct GUID BirthObjectId; // 0x20:

        // Domain Id is currently unused but it is intended to be
        // used in a network environment where the local machine is
        // part of a Windows 2000 Domain. This may be used in a Windows
        // 2000 Advanced Server managed domain.
        struct GUID DomainId;        // 0x30:
};

static_assert(sizeof(struct OBJECT_ID) == 0x40);

/* O Directory entry structure ( rule = 0x13 ) */
struct NTFS_DE_O {
        struct NTFS_DE de;
        struct GUID ObjId;        // 0x10: Unique Id assigned to file.
        struct MFT_REF ref;        // 0x20: MFT record number with this file.

        // Birth Volume Id is the Object Id of the Volume on
        // which the Object Id was allocated. It never changes.
        struct GUID BirthVolumeId; // 0x28:

        // Birth Object Id is the first Object Id that was
        // ever assigned to this MFT Record. I.e. If the Object Id
        // is changed for some reason, this field will reflect the
        // original value of the Object Id.
        // This field is valid if data_size == 0x48.
        struct GUID BirthObjectId; // 0x38:

        // Domain Id is currently unused but it is intended
        // to be used in a network environment where the local
        // machine is part of a Windows 2000 Domain. This may be
        // used in a Windows 2000 Advanced Server managed domain.
        struct GUID BirthDomainId; // 0x48:
};

static_assert(sizeof(struct NTFS_DE_O) == 0x58);

/* Q Directory entry structure ( rule = 0x11 ) */
struct NTFS_DE_Q {
        struct NTFS_DE de;
        __le32 owner_id;        // 0x10: Unique Id assigned to file

        /* here is 0x30 bytes of user quota. NOTE: 4 byte aligned! */
        __le32 Version;                // 0x14: 0x02
        __le32 Flags;                // 0x18: Quota flags, see above
        __le64 BytesUsed;        // 0x1C:
        __le64 ChangeTime;        // 0x24:
        __le64 WarningLimit;        // 0x28:
        __le64 HardLimit;        // 0x34:
        __le64 ExceededTime;        // 0x3C:

        // SID is placed here
}__packed; // sizeof() = 0x44

static_assert(sizeof(struct NTFS_DE_Q) == 0x44);

#define SecurityDescriptorsBlockSize 0x40000 // 256K
#define SecurityDescriptorMaxSize    0x20000 // 128K
#define Log2OfSecurityDescriptorsBlockSize 18

struct SECURITY_KEY {
        __le32 hash; //  Hash value for descriptor
        __le32 sec_id; //  Security Id (guaranteed unique)
};

/* Security descriptors (the content of $Secure::SDS data stream) */
struct SECURITY_HDR {
        struct SECURITY_KEY key;        // 0x00: Security Key.
        __le64 off;                        // 0x08: Offset of this entry in the file.
        __le32 size;                        // 0x10: Size of this entry, 8 byte aligned.
        /*
         * Security descriptor itself is placed here.
         * Total size is 16 byte aligned.
         */
} __packed;

static_assert(sizeof(struct SECURITY_HDR) == 0x14);

/* SII Directory entry structure */
struct NTFS_DE_SII {
        struct NTFS_DE de;
        __le32 sec_id;                        // 0x10: Key: sizeof(security_id) = wKeySize
        struct SECURITY_HDR sec_hdr;        // 0x14:
} __packed;

static_assert(offsetof(struct NTFS_DE_SII, sec_hdr) == 0x14);
static_assert(sizeof(struct NTFS_DE_SII) == 0x28);

/* SDH Directory entry structure */
struct NTFS_DE_SDH {
        struct NTFS_DE de;
        struct SECURITY_KEY key;        // 0x10: Key
        struct SECURITY_HDR sec_hdr;        // 0x18: Data
        __le16 magic[2];                // 0x2C: 0x00490049 "I I"
};

#define SIZEOF_SDH_DIRENTRY 0x30

struct REPARSE_KEY {
        __le32 ReparseTag;                // 0x00: Reparse Tag
        struct MFT_REF ref;                // 0x04: MFT record number with this file
}; // sizeof() = 0x0C

static_assert(offsetof(struct REPARSE_KEY, ref) == 0x04);
#define SIZEOF_REPARSE_KEY 0x0C

/* Reparse Directory entry structure */
struct NTFS_DE_R {
        struct NTFS_DE de;
        struct REPARSE_KEY key;                // 0x10: Reparse Key.
        u32 zero;                        // 0x1c:
}; // sizeof() = 0x20

static_assert(sizeof(struct NTFS_DE_R) == 0x20);

/* CompressReparseBuffer.WofVersion */
#define WOF_CURRENT_VERSION                cpu_to_le32(1)
/* CompressReparseBuffer.WofProvider */
#define WOF_PROVIDER_WIM                cpu_to_le32(1)
/* CompressReparseBuffer.WofProvider */
#define WOF_PROVIDER_SYSTEM                cpu_to_le32(2)
/* CompressReparseBuffer.ProviderVer */
#define WOF_PROVIDER_CURRENT_VERSION        cpu_to_le32(1)

#define WOF_COMPRESSION_XPRESS4K        cpu_to_le32(0) // 4k
#define WOF_COMPRESSION_LZX32K                cpu_to_le32(1) // 32k
#define WOF_COMPRESSION_XPRESS8K        cpu_to_le32(2) // 8k
#define WOF_COMPRESSION_XPRESS16K        cpu_to_le32(3) // 16k

/*
 * ATTR_REPARSE (0xC0)
 *
 * The reparse struct GUID structure is used by all 3rd party layered drivers to
 * store data in a reparse point. For non-Microsoft tags, The struct GUID field
 * cannot be GUID_NULL.
 * The constraints on reparse tags are defined below.
 * Microsoft tags can also be used with this format of the reparse point buffer.
 */
struct REPARSE_POINT {
        __le32 ReparseTag;        // 0x00:
        __le16 ReparseDataLength;// 0x04:
        __le16 Reserved;

        struct GUID Guid;        // 0x08:

        //
        // Here GenericReparseBuffer is placed
        //
};

static_assert(sizeof(struct REPARSE_POINT) == 0x18);

/*
 * The value of the following constant needs to satisfy the following
 * conditions:
 *  (1) Be at least as large as the largest of the reserved tags.
 *  (2) Be strictly smaller than all the tags in use.
 */
#define IO_REPARSE_TAG_RESERVED_RANGE                1

/*
 * The reparse tags are a ULONG. The 32 bits are laid out as follows:
 *
 *   3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
 *   1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
 *  +-+-+-+-+-----------------------+-------------------------------+
 *  |M|R|N|R|          Reserved bits     |            Reparse Tag Value            |
 *  +-+-+-+-+-----------------------+-------------------------------+
 *
 * M is the Microsoft bit. When set to 1, it denotes a tag owned by Microsoft.
 *   All ISVs must use a tag with a 0 in this position.
 *   Note: If a Microsoft tag is used by non-Microsoft software, the
 *   behavior is not defined.
 *
 * R is reserved.  Must be zero for non-Microsoft tags.
 *
 * N is name surrogate. When set to 1, the file represents another named
 *   entity in the system.
 *
 * The M and N bits are OR-able.
 * The following macros check for the M and N bit values:
 */

/*
 * Macro to determine whether a reparse point tag corresponds to a tag
 * owned by Microsoft.
 */
#define IsReparseTagMicrosoft(_tag)        (((_tag)&IO_REPARSE_TAG_MICROSOFT))

/* Macro to determine whether a reparse point tag is a name surrogate. */
#define IsReparseTagNameSurrogate(_tag)        (((_tag)&IO_REPARSE_TAG_NAME_SURROGATE))

/*
 * The following constant represents the bits that are valid to use in
 * reparse tags.
 */
#define IO_REPARSE_TAG_VALID_VALUES        0xF000FFFF

/*
 * Macro to determine whether a reparse tag is a valid tag.
 */
#define IsReparseTagValid(_tag)                                                       \
        (!((_tag) & ~IO_REPARSE_TAG_VALID_VALUES) &&                               \
         ((_tag) > IO_REPARSE_TAG_RESERVED_RANGE))

/* Microsoft tags for reparse points. */

enum IO_REPARSE_TAG {
        IO_REPARSE_TAG_SYMBOLIC_LINK        = cpu_to_le32(0),
        IO_REPARSE_TAG_NAME_SURROGATE        = cpu_to_le32(0x20000000),
        IO_REPARSE_TAG_MICROSOFT        = cpu_to_le32(0x80000000),
        IO_REPARSE_TAG_MOUNT_POINT        = cpu_to_le32(0xA0000003),
        IO_REPARSE_TAG_SYMLINK                = cpu_to_le32(0xA000000C),
        IO_REPARSE_TAG_HSM                = cpu_to_le32(0xC0000004),
        IO_REPARSE_TAG_SIS                = cpu_to_le32(0x80000007),
        IO_REPARSE_TAG_DEDUP                = cpu_to_le32(0x80000013),
        IO_REPARSE_TAG_COMPRESS                = cpu_to_le32(0x80000017),

        /*
         * The reparse tag 0x80000008 is reserved for Microsoft internal use.
         * May be published in the future.
         */

        /* Microsoft reparse tag reserved for DFS */
        IO_REPARSE_TAG_DFS        = cpu_to_le32(0x8000000A),

        /* Microsoft reparse tag reserved for the file system filter manager. */
        IO_REPARSE_TAG_FILTER_MANAGER        = cpu_to_le32(0x8000000B),

        /* Non-Microsoft tags for reparse points */

        /* Tag allocated to CONGRUENT, May 2000. Used by IFSTEST. */
        IO_REPARSE_TAG_IFSTEST_CONGRUENT = cpu_to_le32(0x00000009),

        /* Tag allocated to ARKIVIO. */
        IO_REPARSE_TAG_ARKIVIO        = cpu_to_le32(0x0000000C),

        /* Tag allocated to SOLUTIONSOFT. */
        IO_REPARSE_TAG_SOLUTIONSOFT        = cpu_to_le32(0x2000000D),

        /* Tag allocated to COMMVAULT. */
        IO_REPARSE_TAG_COMMVAULT        = cpu_to_le32(0x0000000E),

        /* OneDrive?? */
        IO_REPARSE_TAG_CLOUD        = cpu_to_le32(0x9000001A),
        IO_REPARSE_TAG_CLOUD_1        = cpu_to_le32(0x9000101A),
        IO_REPARSE_TAG_CLOUD_2        = cpu_to_le32(0x9000201A),
        IO_REPARSE_TAG_CLOUD_3        = cpu_to_le32(0x9000301A),
        IO_REPARSE_TAG_CLOUD_4        = cpu_to_le32(0x9000401A),
        IO_REPARSE_TAG_CLOUD_5        = cpu_to_le32(0x9000501A),
        IO_REPARSE_TAG_CLOUD_6        = cpu_to_le32(0x9000601A),
        IO_REPARSE_TAG_CLOUD_7        = cpu_to_le32(0x9000701A),
        IO_REPARSE_TAG_CLOUD_8        = cpu_to_le32(0x9000801A),
        IO_REPARSE_TAG_CLOUD_9        = cpu_to_le32(0x9000901A),
        IO_REPARSE_TAG_CLOUD_A        = cpu_to_le32(0x9000A01A),
        IO_REPARSE_TAG_CLOUD_B        = cpu_to_le32(0x9000B01A),
        IO_REPARSE_TAG_CLOUD_C        = cpu_to_le32(0x9000C01A),
        IO_REPARSE_TAG_CLOUD_D        = cpu_to_le32(0x9000D01A),
        IO_REPARSE_TAG_CLOUD_E        = cpu_to_le32(0x9000E01A),
        IO_REPARSE_TAG_CLOUD_F        = cpu_to_le32(0x9000F01A),

};

#define SYMLINK_FLAG_RELATIVE                1

/* Microsoft reparse buffer. (see DDK for details) */
struct REPARSE_DATA_BUFFER {
        __le32 ReparseTag;                // 0x00:
        __le16 ReparseDataLength;        // 0x04:
        __le16 Reserved;

        union {
                /* If ReparseTag == 0xA0000003 (IO_REPARSE_TAG_MOUNT_POINT) */
                struct {
                        __le16 SubstituteNameOffset; // 0x08
                        __le16 SubstituteNameLength; // 0x0A
                        __le16 PrintNameOffset;      // 0x0C
                        __le16 PrintNameLength;      // 0x0E
                        __le16 PathBuffer[];             // 0x10
                } MountPointReparseBuffer;

                /*
                 * If ReparseTag == 0xA000000C (IO_REPARSE_TAG_SYMLINK)
                 * https://msdn.microsoft.com/en-us/library/cc232006.aspx
                 */
                struct {
                        __le16 SubstituteNameOffset; // 0x08
                        __le16 SubstituteNameLength; // 0x0A
                        __le16 PrintNameOffset;      // 0x0C
                        __le16 PrintNameLength;      // 0x0E
                        // 0-absolute path 1- relative path, SYMLINK_FLAG_RELATIVE
                        __le32 Flags;                     // 0x10
                        __le16 PathBuffer[];             // 0x14
                } SymbolicLinkReparseBuffer;

                /* If ReparseTag == 0x80000017U */
                struct {
                        __le32 WofVersion;  // 0x08 == 1
                        /*
                         * 1 - WIM backing provider ("WIMBoot"),
                         * 2 - System compressed file provider
                         */
                        __le32 WofProvider; // 0x0C:
                        __le32 ProviderVer; // 0x10: == 1 WOF_FILE_PROVIDER_CURRENT_VERSION == 1
                        __le32 CompressionFormat; // 0x14: 0, 1, 2, 3. See WOF_COMPRESSION_XXX
                } CompressReparseBuffer;

                struct {
                        u8 DataBuffer[1];   // 0x08:
                } GenericReparseBuffer;
        };
};

/* ATTR_EA_INFO (0xD0) */

#define FILE_NEED_EA 0x80 // See ntifs.h
/*
 * FILE_NEED_EA, indicates that the file to which the EA belongs cannot be
 * interpreted without understanding the associated extended attributes.
 */
struct EA_INFO {
        __le16 size_pack;        // 0x00: Size of buffer to hold in packed form.
        __le16 count;                // 0x02: Count of EA's with FILE_NEED_EA bit set.
        __le32 size;                // 0x04: Size of buffer to hold in unpacked form.
};

static_assert(sizeof(struct EA_INFO) == 8);

/* ATTR_EA (0xE0) */
struct EA_FULL {
        __le32 size;                // 0x00: (not in packed)
        u8 flags;                // 0x04:
        u8 name_len;                // 0x05:
        __le16 elength;                // 0x06:
        u8 name[];                // 0x08:
};

static_assert(offsetof(struct EA_FULL, name) == 8);

#define ACL_REVISION        2
#define ACL_REVISION_DS 4

#define SE_SELF_RELATIVE cpu_to_le16(0x8000)

struct SECURITY_DESCRIPTOR_RELATIVE {
        u8 Revision;
        u8 Sbz1;
        __le16 Control;
        __le32 Owner;
        __le32 Group;
        __le32 Sacl;
        __le32 Dacl;
};
static_assert(sizeof(struct SECURITY_DESCRIPTOR_RELATIVE) == 0x14);

struct ACE_HEADER {
        u8 AceType;
        u8 AceFlags;
        __le16 AceSize;
};
static_assert(sizeof(struct ACE_HEADER) == 4);

struct ACL {
        u8 AclRevision;
        u8 Sbz1;
        __le16 AclSize;
        __le16 AceCount;
        __le16 Sbz2;
};
static_assert(sizeof(struct ACL) == 8);

struct SID {
        u8 Revision;
        u8 SubAuthorityCount;
        u8 IdentifierAuthority[6];
        __le32 SubAuthority[];
};
static_assert(offsetof(struct SID, SubAuthority) == 8);

#endif /* _LINUX_NTFS3_NTFS_H */
// clang-format on































































































































































































































































































































































































































































































































































































































































































































































































































 32366 






 32367 




































































  557 







  555 


























































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
// SPDX-License-Identifier: GPL-2.0-only
/* Common code for 32 and 64-bit NUMA */
#include <linux/acpi.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/of.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/memblock.h>
#include <linux/mmzone.h>
#include <linux/ctype.h>
#include <linux/nodemask.h>
#include <linux/sched.h>
#include <linux/topology.h>
#include <linux/sort.h>

#include <asm/e820/api.h>
#include <asm/proto.h>
#include <asm/dma.h>
#include <asm/amd_nb.h>

#include "numa_internal.h"

int numa_off;
nodemask_t numa_nodes_parsed __initdata;

struct pglist_data *node_data[MAX_NUMNODES] __read_mostly;
EXPORT_SYMBOL(node_data);

static struct numa_meminfo numa_meminfo __initdata_or_meminfo;
static struct numa_meminfo numa_reserved_meminfo __initdata_or_meminfo;

static int numa_distance_cnt;
static u8 *numa_distance;

static __init int numa_setup(char *opt)
{
        if (!opt)
                return -EINVAL;
        if (!strncmp(opt, "off", 3))
                numa_off = 1;
        if (!strncmp(opt, "fake=", 5))
                return numa_emu_cmdline(opt + 5);
        if (!strncmp(opt, "noacpi", 6))
                disable_srat();
        if (!strncmp(opt, "nohmat", 6))
                disable_hmat();
        return 0;
}
early_param("numa", numa_setup);

/*
 * apicid, cpu, node mappings
 */
s16 __apicid_to_node[MAX_LOCAL_APIC] = {
        [0 ... MAX_LOCAL_APIC-1] = NUMA_NO_NODE
};

int numa_cpu_node(int cpu)
{
        u32 apicid = early_per_cpu(x86_cpu_to_apicid, cpu);

        if (apicid != BAD_APICID)
                return __apicid_to_node[apicid];
        return NUMA_NO_NODE;
}

cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
EXPORT_SYMBOL(node_to_cpumask_map);

/*
 * Map cpu index to node index
 */
DEFINE_EARLY_PER_CPU(int, x86_cpu_to_node_map, NUMA_NO_NODE);
EXPORT_EARLY_PER_CPU_SYMBOL(x86_cpu_to_node_map);

void numa_set_node(int cpu, int node)
{
        int *cpu_to_node_map = early_per_cpu_ptr(x86_cpu_to_node_map);

        /* early setting, no percpu area yet */
        if (cpu_to_node_map) {
                cpu_to_node_map[cpu] = node;
                return;
        }

#ifdef CONFIG_DEBUG_PER_CPU_MAPS
        if (cpu >= nr_cpu_ids || !cpu_possible(cpu)) {
                printk(KERN_ERR "numa_set_node: invalid cpu# (%d)\n", cpu);
                dump_stack();
                return;
        }
#endif
        per_cpu(x86_cpu_to_node_map, cpu) = node;

        set_cpu_numa_node(cpu, node);
}

void numa_clear_node(int cpu)
{
        numa_set_node(cpu, NUMA_NO_NODE);
}

/*
 * Allocate node_to_cpumask_map based on number of available nodes
 * Requires node_possible_map to be valid.
 *
 * Note: cpumask_of_node() is not valid until after this is done.
 * (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
 */
void __init setup_node_to_cpumask_map(void)
{
        unsigned int node;

        /* setup nr_node_ids if not done yet */
        if (nr_node_ids == MAX_NUMNODES)
                setup_nr_node_ids();

        /* allocate the map */
        for (node = 0; node < nr_node_ids; node++)
                alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]);

        /* cpumask_of_node() will now work */
        pr_debug("Node to cpumask map for %u nodes\n", nr_node_ids);
}

static int __init numa_add_memblk_to(int nid, u64 start, u64 end,
                                     struct numa_meminfo *mi)
{
        /* ignore zero length blks */
        if (start == end)
                return 0;

        /* whine about and ignore invalid blks */
        if (start > end || nid < 0 || nid >= MAX_NUMNODES) {
                pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n",
                        nid, start, end - 1);
                return 0;
        }

        if (mi->nr_blks >= NR_NODE_MEMBLKS) {
                pr_err("too many memblk ranges\n");
                return -EINVAL;
        }

        mi->blk[mi->nr_blks].start = start;
        mi->blk[mi->nr_blks].end = end;
        mi->blk[mi->nr_blks].nid = nid;
        mi->nr_blks++;
        return 0;
}

/**
 * numa_remove_memblk_from - Remove one numa_memblk from a numa_meminfo
 * @idx: Index of memblk to remove
 * @mi: numa_meminfo to remove memblk from
 *
 * Remove @idx'th numa_memblk from @mi by shifting @mi->blk[] and
 * decrementing @mi->nr_blks.
 */
void __init numa_remove_memblk_from(int idx, struct numa_meminfo *mi)
{
        mi->nr_blks--;
        memmove(&mi->blk[idx], &mi->blk[idx + 1],
                (mi->nr_blks - idx) * sizeof(mi->blk[0]));
}

/**
 * numa_move_tail_memblk - Move a numa_memblk from one numa_meminfo to another
 * @dst: numa_meminfo to append block to
 * @idx: Index of memblk to remove
 * @src: numa_meminfo to remove memblk from
 */
static void __init numa_move_tail_memblk(struct numa_meminfo *dst, int idx,
                                         struct numa_meminfo *src)
{
        dst->blk[dst->nr_blks++] = src->blk[idx];
        numa_remove_memblk_from(idx, src);
}

/**
 * numa_add_memblk - Add one numa_memblk to numa_meminfo
 * @nid: NUMA node ID of the new memblk
 * @start: Start address of the new memblk
 * @end: End address of the new memblk
 *
 * Add a new memblk to the default numa_meminfo.
 *
 * RETURNS:
 * 0 on success, -errno on failure.
 */
int __init numa_add_memblk(int nid, u64 start, u64 end)
{
        return numa_add_memblk_to(nid, start, end, &numa_meminfo);
}

/* Allocate NODE_DATA for a node on the local memory */
static void __init alloc_node_data(int nid)
{
        const size_t nd_size = roundup(sizeof(pg_data_t), PAGE_SIZE);
        u64 nd_pa;
        void *nd;
        int tnid;

        /*
         * Allocate node data.  Try node-local memory and then any node.
         * Never allocate in DMA zone.
         */
        nd_pa = memblock_phys_alloc_try_nid(nd_size, SMP_CACHE_BYTES, nid);
        if (!nd_pa) {
                pr_err("Cannot find %zu bytes in any node (initial node: %d)\n",
                       nd_size, nid);
                return;
        }
        nd = __va(nd_pa);

        /* report and initialize */
        printk(KERN_INFO "NODE_DATA(%d) allocated [mem %#010Lx-%#010Lx]\n", nid,
               nd_pa, nd_pa + nd_size - 1);
        tnid = early_pfn_to_nid(nd_pa >> PAGE_SHIFT);
        if (tnid != nid)
                printk(KERN_INFO "    NODE_DATA(%d) on node %d\n", nid, tnid);

        node_data[nid] = nd;
        memset(NODE_DATA(nid), 0, sizeof(pg_data_t));

        node_set_online(nid);
}

/**
 * numa_cleanup_meminfo - Cleanup a numa_meminfo
 * @mi: numa_meminfo to clean up
 *
 * Sanitize @mi by merging and removing unnecessary memblks.  Also check for
 * conflicts and clear unused memblks.
 *
 * RETURNS:
 * 0 on success, -errno on failure.
 */
int __init numa_cleanup_meminfo(struct numa_meminfo *mi)
{
        const u64 low = 0;
        const u64 high = PFN_PHYS(max_pfn);
        int i, j, k;

        /* first, trim all entries */
        for (i = 0; i < mi->nr_blks; i++) {
                struct numa_memblk *bi = &mi->blk[i];

                /* move / save reserved memory ranges */
                if (!memblock_overlaps_region(&memblock.memory,
                                        bi->start, bi->end - bi->start)) {
                        numa_move_tail_memblk(&numa_reserved_meminfo, i--, mi);
                        continue;
                }

                /* make sure all non-reserved blocks are inside the limits */
                bi->start = max(bi->start, low);

                /* preserve info for non-RAM areas above 'max_pfn': */
                if (bi->end > high) {
                        numa_add_memblk_to(bi->nid, high, bi->end,
                                           &numa_reserved_meminfo);
                        bi->end = high;
                }

                /* and there's no empty block */
                if (bi->start >= bi->end)
                        numa_remove_memblk_from(i--, mi);
        }

        /* merge neighboring / overlapping entries */
        for (i = 0; i < mi->nr_blks; i++) {
                struct numa_memblk *bi = &mi->blk[i];

                for (j = i + 1; j < mi->nr_blks; j++) {
                        struct numa_memblk *bj = &mi->blk[j];
                        u64 start, end;

                        /*
                         * See whether there are overlapping blocks.  Whine
                         * about but allow overlaps of the same nid.  They
                         * will be merged below.
                         */
                        if (bi->end > bj->start && bi->start < bj->end) {
                                if (bi->nid != bj->nid) {
                                        pr_err("node %d [mem %#010Lx-%#010Lx] overlaps with node %d [mem %#010Lx-%#010Lx]\n",
                                               bi->nid, bi->start, bi->end - 1,
                                               bj->nid, bj->start, bj->end - 1);
                                        return -EINVAL;
                                }
                                pr_warn("Warning: node %d [mem %#010Lx-%#010Lx] overlaps with itself [mem %#010Lx-%#010Lx]\n",
                                        bi->nid, bi->start, bi->end - 1,
                                        bj->start, bj->end - 1);
                        }

                        /*
                         * Join together blocks on the same node, holes
                         * between which don't overlap with memory on other
                         * nodes.
                         */
                        if (bi->nid != bj->nid)
                                continue;
                        start = min(bi->start, bj->start);
                        end = max(bi->end, bj->end);
                        for (k = 0; k < mi->nr_blks; k++) {
                                struct numa_memblk *bk = &mi->blk[k];

                                if (bi->nid == bk->nid)
                                        continue;
                                if (start < bk->end && end > bk->start)
                                        break;
                        }
                        if (k < mi->nr_blks)
                                continue;
                        printk(KERN_INFO "NUMA: Node %d [mem %#010Lx-%#010Lx] + [mem %#010Lx-%#010Lx] -> [mem %#010Lx-%#010Lx]\n",
                               bi->nid, bi->start, bi->end - 1, bj->start,
                               bj->end - 1, start, end - 1);
                        bi->start = start;
                        bi->end = end;
                        numa_remove_memblk_from(j--, mi);
                }
        }

        /* clear unused ones */
        for (i = mi->nr_blks; i < ARRAY_SIZE(mi->blk); i++) {
                mi->blk[i].start = mi->blk[i].end = 0;
                mi->blk[i].nid = NUMA_NO_NODE;
        }

        return 0;
}

/*
 * Set nodes, which have memory in @mi, in *@nodemask.
 */
static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask,
                                              const struct numa_meminfo *mi)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(mi->blk); i++)
                if (mi->blk[i].start != mi->blk[i].end &&
                    mi->blk[i].nid != NUMA_NO_NODE)
                        node_set(mi->blk[i].nid, *nodemask);
}

/**
 * numa_reset_distance - Reset NUMA distance table
 *
 * The current table is freed.  The next numa_set_distance() call will
 * create a new one.
 */
void __init numa_reset_distance(void)
{
        size_t size = numa_distance_cnt * numa_distance_cnt * sizeof(numa_distance[0]);

        /* numa_distance could be 1LU marking allocation failure, test cnt */
        if (numa_distance_cnt)
                memblock_free(numa_distance, size);
        numa_distance_cnt = 0;
        numa_distance = NULL;        /* enable table creation */
}

static int __init numa_alloc_distance(void)
{
        nodemask_t nodes_parsed;
        size_t size;
        int i, j, cnt = 0;
        u64 phys;

        /* size the new table and allocate it */
        nodes_parsed = numa_nodes_parsed;
        numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo);

        for_each_node_mask(i, nodes_parsed)
                cnt = i;
        cnt++;
        size = cnt * cnt * sizeof(numa_distance[0]);

        phys = memblock_phys_alloc_range(size, PAGE_SIZE, 0,
                                         PFN_PHYS(max_pfn_mapped));
        if (!phys) {
                pr_warn("Warning: can't allocate distance table!\n");
                /* don't retry until explicitly reset */
                numa_distance = (void *)1LU;
                return -ENOMEM;
        }

        numa_distance = __va(phys);
        numa_distance_cnt = cnt;

        /* fill with the default distances */
        for (i = 0; i < cnt; i++)
                for (j = 0; j < cnt; j++)
                        numa_distance[i * cnt + j] = i == j ?
                                LOCAL_DISTANCE : REMOTE_DISTANCE;
        printk(KERN_DEBUG "NUMA: Initialized distance table, cnt=%d\n", cnt);

        return 0;
}

/**
 * numa_set_distance - Set NUMA distance from one NUMA to another
 * @from: the 'from' node to set distance
 * @to: the 'to'  node to set distance
 * @distance: NUMA distance
 *
 * Set the distance from node @from to @to to @distance.  If distance table
 * doesn't exist, one which is large enough to accommodate all the currently
 * known nodes will be created.
 *
 * If such table cannot be allocated, a warning is printed and further
 * calls are ignored until the distance table is reset with
 * numa_reset_distance().
 *
 * If @from or @to is higher than the highest known node or lower than zero
 * at the time of table creation or @distance doesn't make sense, the call
 * is ignored.
 * This is to allow simplification of specific NUMA config implementations.
 */
void __init numa_set_distance(int from, int to, int distance)
{
        if (!numa_distance && numa_alloc_distance() < 0)
                return;

        if (from >= numa_distance_cnt || to >= numa_distance_cnt ||
                        from < 0 || to < 0) {
                pr_warn_once("Warning: node ids are out of bound, from=%d to=%d distance=%d\n",
                             from, to, distance);
                return;
        }

        if ((u8)distance != distance ||
            (from == to && distance != LOCAL_DISTANCE)) {
                pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
                             from, to, distance);
                return;
        }

        numa_distance[from * numa_distance_cnt + to] = distance;
}

int __node_distance(int from, int to)
{
        if (from >= numa_distance_cnt || to >= numa_distance_cnt)
                return from == to ? LOCAL_DISTANCE : REMOTE_DISTANCE;
        return numa_distance[from * numa_distance_cnt + to];
}
EXPORT_SYMBOL(__node_distance);

/*
 * Mark all currently memblock-reserved physical memory (which covers the
 * kernel's own memory ranges) as hot-unswappable.
 */
static void __init numa_clear_kernel_node_hotplug(void)
{
        nodemask_t reserved_nodemask = NODE_MASK_NONE;
        struct memblock_region *mb_region;
        int i;

        /*
         * We have to do some preprocessing of memblock regions, to
         * make them suitable for reservation.
         *
         * At this time, all memory regions reserved by memblock are
         * used by the kernel, but those regions are not split up
         * along node boundaries yet, and don't necessarily have their
         * node ID set yet either.
         *
         * So iterate over all memory known to the x86 architecture,
         * and use those ranges to set the nid in memblock.reserved.
         * This will split up the memblock regions along node
         * boundaries and will set the node IDs as well.
         */
        for (i = 0; i < numa_meminfo.nr_blks; i++) {
                struct numa_memblk *mb = numa_meminfo.blk + i;
                int ret;

                ret = memblock_set_node(mb->start, mb->end - mb->start, &memblock.reserved, mb->nid);
                WARN_ON_ONCE(ret);
        }

        /*
         * Now go over all reserved memblock regions, to construct a
         * node mask of all kernel reserved memory areas.
         *
         * [ Note, when booting with mem=nn[kMG] or in a kdump kernel,
         *   numa_meminfo might not include all memblock.reserved
         *   memory ranges, because quirks such as trim_snb_memory()
         *   reserve specific pages for Sandy Bridge graphics. ]
         */
        for_each_reserved_mem_region(mb_region) {
                int nid = memblock_get_region_node(mb_region);

                if (nid != NUMA_NO_NODE)
                        node_set(nid, reserved_nodemask);
        }

        /*
         * Finally, clear the MEMBLOCK_HOTPLUG flag for all memory
         * belonging to the reserved node mask.
         *
         * Note that this will include memory regions that reside
         * on nodes that contain kernel memory - entire nodes
         * become hot-unpluggable:
         */
        for (i = 0; i < numa_meminfo.nr_blks; i++) {
                struct numa_memblk *mb = numa_meminfo.blk + i;

                if (!node_isset(mb->nid, reserved_nodemask))
                        continue;

                memblock_clear_hotplug(mb->start, mb->end - mb->start);
        }
}

static int __init numa_register_memblks(struct numa_meminfo *mi)
{
        int i, nid;

        /* Account for nodes with cpus and no memory */
        node_possible_map = numa_nodes_parsed;
        numa_nodemask_from_meminfo(&node_possible_map, mi);
        if (WARN_ON(nodes_empty(node_possible_map)))
                return -EINVAL;

        for (i = 0; i < mi->nr_blks; i++) {
                struct numa_memblk *mb = &mi->blk[i];
                memblock_set_node(mb->start, mb->end - mb->start,
                                  &memblock.memory, mb->nid);
        }

        /*
         * At very early time, the kernel have to use some memory such as
         * loading the kernel image. We cannot prevent this anyway. So any
         * node the kernel resides in should be un-hotpluggable.
         *
         * And when we come here, alloc node data won't fail.
         */
        numa_clear_kernel_node_hotplug();

        /*
         * If sections array is gonna be used for pfn -> nid mapping, check
         * whether its granularity is fine enough.
         */
        if (IS_ENABLED(NODE_NOT_IN_PAGE_FLAGS)) {
                unsigned long pfn_align = node_map_pfn_alignment();

                if (pfn_align && pfn_align < PAGES_PER_SECTION) {
                        pr_warn("Node alignment %LuMB < min %LuMB, rejecting NUMA config\n",
                                PFN_PHYS(pfn_align) >> 20,
                                PFN_PHYS(PAGES_PER_SECTION) >> 20);
                        return -EINVAL;
                }
        }

        if (!memblock_validate_numa_coverage(SZ_1M))
                return -EINVAL;

        /* Finally register nodes. */
        for_each_node_mask(nid, node_possible_map) {
                u64 start = PFN_PHYS(max_pfn);
                u64 end = 0;

                for (i = 0; i < mi->nr_blks; i++) {
                        if (nid != mi->blk[i].nid)
                                continue;
                        start = min(mi->blk[i].start, start);
                        end = max(mi->blk[i].end, end);
                }

                if (start >= end)
                        continue;

                alloc_node_data(nid);
        }

        /* Dump memblock with node info and return. */
        memblock_dump_all();
        return 0;
}

/*
 * There are unfortunately some poorly designed mainboards around that
 * only connect memory to a single CPU. This breaks the 1:1 cpu->node
 * mapping. To avoid this fill in the mapping for all possible CPUs,
 * as the number of CPUs is not known yet. We round robin the existing
 * nodes.
 */
static void __init numa_init_array(void)
{
        int rr, i;

        rr = first_node(node_online_map);
        for (i = 0; i < nr_cpu_ids; i++) {
                if (early_cpu_to_node(i) != NUMA_NO_NODE)
                        continue;
                numa_set_node(i, rr);
                rr = next_node_in(rr, node_online_map);
        }
}

static int __init numa_init(int (*init_func)(void))
{
        int i;
        int ret;

        for (i = 0; i < MAX_LOCAL_APIC; i++)
                set_apicid_to_node(i, NUMA_NO_NODE);

        nodes_clear(numa_nodes_parsed);
        nodes_clear(node_possible_map);
        nodes_clear(node_online_map);
        memset(&numa_meminfo, 0, sizeof(numa_meminfo));
        WARN_ON(memblock_set_node(0, ULLONG_MAX, &memblock.memory,
                                  NUMA_NO_NODE));
        WARN_ON(memblock_set_node(0, ULLONG_MAX, &memblock.reserved,
                                  NUMA_NO_NODE));
        /* In case that parsing SRAT failed. */
        WARN_ON(memblock_clear_hotplug(0, ULLONG_MAX));
        numa_reset_distance();

        ret = init_func();
        if (ret < 0)
                return ret;

        /*
         * We reset memblock back to the top-down direction
         * here because if we configured ACPI_NUMA, we have
         * parsed SRAT in init_func(). It is ok to have the
         * reset here even if we did't configure ACPI_NUMA
         * or acpi numa init fails and fallbacks to dummy
         * numa init.
         */
        memblock_set_bottom_up(false);

        ret = numa_cleanup_meminfo(&numa_meminfo);
        if (ret < 0)
                return ret;

        numa_emulation(&numa_meminfo, numa_distance_cnt);

        ret = numa_register_memblks(&numa_meminfo);
        if (ret < 0)
                return ret;

        for (i = 0; i < nr_cpu_ids; i++) {
                int nid = early_cpu_to_node(i);

                if (nid == NUMA_NO_NODE)
                        continue;
                if (!node_online(nid))
                        numa_clear_node(i);
        }
        numa_init_array();

        return 0;
}

/**
 * dummy_numa_init - Fallback dummy NUMA init
 *
 * Used if there's no underlying NUMA architecture, NUMA initialization
 * fails, or NUMA is disabled on the command line.
 *
 * Must online at least one node and add memory blocks that cover all
 * allowed memory.  This function must not fail.
 */
static int __init dummy_numa_init(void)
{
        printk(KERN_INFO "%s\n",
               numa_off ? "NUMA turned off" : "No NUMA configuration found");
        printk(KERN_INFO "Faking a node at [mem %#018Lx-%#018Lx]\n",
               0LLU, PFN_PHYS(max_pfn) - 1);

        node_set(0, numa_nodes_parsed);
        numa_add_memblk(0, 0, PFN_PHYS(max_pfn));

        return 0;
}

/**
 * x86_numa_init - Initialize NUMA
 *
 * Try each configured NUMA initialization method until one succeeds.  The
 * last fallback is dummy single node config encompassing whole memory and
 * never fails.
 */
void __init x86_numa_init(void)
{
        if (!numa_off) {
#ifdef CONFIG_ACPI_NUMA
                if (!numa_init(x86_acpi_numa_init))
                        return;
#endif
#ifdef CONFIG_AMD_NUMA
                if (!numa_init(amd_numa_init))
                        return;
#endif
                if (acpi_disabled && !numa_init(of_numa_init))
                        return;
        }

        numa_init(dummy_numa_init);
}


/*
 * A node may exist which has one or more Generic Initiators but no CPUs and no
 * memory.
 *
 * This function must be called after init_cpu_to_node(), to ensure that any
 * memoryless CPU nodes have already been brought online, and before the
 * node_data[nid] is needed for zone list setup in build_all_zonelists().
 *
 * When this function is called, any nodes containing either memory and/or CPUs
 * will already be online and there is no need to do anything extra, even if
 * they also contain one or more Generic Initiators.
 */
void __init init_gi_nodes(void)
{
        int nid;

        /*
         * Exclude this node from
         * bringup_nonboot_cpus
         *  cpu_up
         *   __try_online_node
         *    register_one_node
         * because node_subsys is not initialized yet.
         * TODO remove dependency on node_online
         */
        for_each_node_state(nid, N_GENERIC_INITIATOR)
                if (!node_online(nid))
                        node_set_online(nid);
}

/*
 * Setup early cpu_to_node.
 *
 * Populate cpu_to_node[] only if x86_cpu_to_apicid[],
 * and apicid_to_node[] tables have valid entries for a CPU.
 * This means we skip cpu_to_node[] initialisation for NUMA
 * emulation and faking node case (when running a kernel compiled
 * for NUMA on a non NUMA box), which is OK as cpu_to_node[]
 * is already initialized in a round robin manner at numa_init_array,
 * prior to this call, and this initialization is good enough
 * for the fake NUMA cases.
 *
 * Called before the per_cpu areas are setup.
 */
void __init init_cpu_to_node(void)
{
        int cpu;
        u32 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid);

        BUG_ON(cpu_to_apicid == NULL);

        for_each_possible_cpu(cpu) {
                int node = numa_cpu_node(cpu);

                if (node == NUMA_NO_NODE)
                        continue;

                /*
                 * Exclude this node from
                 * bringup_nonboot_cpus
                 *  cpu_up
                 *   __try_online_node
                 *    register_one_node
                 * because node_subsys is not initialized yet.
                 * TODO remove dependency on node_online
                 */
                if (!node_online(node))
                        node_set_online(node);

                numa_set_node(cpu, node);
        }
}

#ifndef CONFIG_DEBUG_PER_CPU_MAPS

# ifndef CONFIG_NUMA_EMU
void numa_add_cpu(int cpu)
{
        cpumask_set_cpu(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
}

void numa_remove_cpu(int cpu)
{
        cpumask_clear_cpu(cpu, node_to_cpumask_map[early_cpu_to_node(cpu)]);
}
# endif        /* !CONFIG_NUMA_EMU */

#else        /* !CONFIG_DEBUG_PER_CPU_MAPS */

int __cpu_to_node(int cpu)
{
        if (early_per_cpu_ptr(x86_cpu_to_node_map)) {
                printk(KERN_WARNING
                        "cpu_to_node(%d): usage too early!\n", cpu);
                dump_stack();
                return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
        }
        return per_cpu(x86_cpu_to_node_map, cpu);
}
EXPORT_SYMBOL(__cpu_to_node);

/*
 * Same function as cpu_to_node() but used if called before the
 * per_cpu areas are setup.
 */
int early_cpu_to_node(int cpu)
{
        if (early_per_cpu_ptr(x86_cpu_to_node_map))
                return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];

        if (!cpu_possible(cpu)) {
                printk(KERN_WARNING
                        "early_cpu_to_node(%d): no per_cpu area!\n", cpu);
                dump_stack();
                return NUMA_NO_NODE;
        }
        return per_cpu(x86_cpu_to_node_map, cpu);
}

void debug_cpumask_set_cpu(int cpu, int node, bool enable)
{
        struct cpumask *mask;

        if (node == NUMA_NO_NODE) {
                /* early_cpu_to_node() already emits a warning and trace */
                return;
        }
        mask = node_to_cpumask_map[node];
        if (!cpumask_available(mask)) {
                pr_err("node_to_cpumask_map[%i] NULL\n", node);
                dump_stack();
                return;
        }

        if (enable)
                cpumask_set_cpu(cpu, mask);
        else
                cpumask_clear_cpu(cpu, mask);

        printk(KERN_DEBUG "%s cpu %d node %d: mask now %*pbl\n",
                enable ? "numa_add_cpu" : "numa_remove_cpu",
                cpu, node, cpumask_pr_args(mask));
        return;
}

# ifndef CONFIG_NUMA_EMU
static void numa_set_cpumask(int cpu, bool enable)
{
        debug_cpumask_set_cpu(cpu, early_cpu_to_node(cpu), enable);
}

void numa_add_cpu(int cpu)
{
        numa_set_cpumask(cpu, true);
}

void numa_remove_cpu(int cpu)
{
        numa_set_cpumask(cpu, false);
}
# endif        /* !CONFIG_NUMA_EMU */

/*
 * Returns a pointer to the bitmask of CPUs on Node 'node'.
 */
const struct cpumask *cpumask_of_node(int node)
{
        if ((unsigned)node >= nr_node_ids) {
                printk(KERN_WARNING
                        "cpumask_of_node(%d): (unsigned)node >= nr_node_ids(%u)\n",
                        node, nr_node_ids);
                dump_stack();
                return cpu_none_mask;
        }
        if (!cpumask_available(node_to_cpumask_map[node])) {
                printk(KERN_WARNING
                        "cpumask_of_node(%d): no node_to_cpumask_map!\n",
                        node);
                dump_stack();
                return cpu_online_mask;
        }
        return node_to_cpumask_map[node];
}
EXPORT_SYMBOL(cpumask_of_node);

#endif        /* !CONFIG_DEBUG_PER_CPU_MAPS */

#ifdef CONFIG_NUMA_KEEP_MEMINFO
static int meminfo_to_nid(struct numa_meminfo *mi, u64 start)
{
        int i;

        for (i = 0; i < mi->nr_blks; i++)
                if (mi->blk[i].start <= start && mi->blk[i].end > start)
                        return mi->blk[i].nid;
        return NUMA_NO_NODE;
}

int phys_to_target_node(phys_addr_t start)
{
        int nid = meminfo_to_nid(&numa_meminfo, start);

        /*
         * Prefer online nodes, but if reserved memory might be
         * hot-added continue the search with reserved ranges.
         */
        if (nid != NUMA_NO_NODE)
                return nid;

        return meminfo_to_nid(&numa_reserved_meminfo, start);
}
EXPORT_SYMBOL_GPL(phys_to_target_node);

int memory_add_physaddr_to_nid(u64 start)
{
        int nid = meminfo_to_nid(&numa_meminfo, start);

        if (nid == NUMA_NO_NODE)
                nid = numa_meminfo.blk[0].nid;
        return nid;
}
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);

#endif

static int __init cmp_memblk(const void *a, const void *b)
{
        const struct numa_memblk *ma = *(const struct numa_memblk **)a;
        const struct numa_memblk *mb = *(const struct numa_memblk **)b;

        return (ma->start > mb->start) - (ma->start < mb->start);
}

static struct numa_memblk *numa_memblk_list[NR_NODE_MEMBLKS] __initdata;

/**
 * numa_fill_memblks - Fill gaps in numa_meminfo memblks
 * @start: address to begin fill
 * @end: address to end fill
 *
 * Find and extend numa_meminfo memblks to cover the physical
 * address range @start-@end
 *
 * RETURNS:
 * 0                  : Success
 * NUMA_NO_MEMBLK : No memblks exist in address range @start-@end
 */

int __init numa_fill_memblks(u64 start, u64 end)
{
        struct numa_memblk **blk = &numa_memblk_list[0];
        struct numa_meminfo *mi = &numa_meminfo;
        int count = 0;
        u64 prev_end;

        /*
         * Create a list of pointers to numa_meminfo memblks that
         * overlap start, end. The list is used to make in-place
         * changes that fill out the numa_meminfo memblks.
         */
        for (int i = 0; i < mi->nr_blks; i++) {
                struct numa_memblk *bi = &mi->blk[i];

                if (memblock_addrs_overlap(start, end - start, bi->start,
                                           bi->end - bi->start)) {
                        blk[count] = &mi->blk[i];
                        count++;
                }
        }
        if (!count)
                return NUMA_NO_MEMBLK;

        /* Sort the list of pointers in memblk->start order */
        sort(&blk[0], count, sizeof(blk[0]), cmp_memblk, NULL);

        /* Make sure the first/last memblks include start/end */
        blk[0]->start = min(blk[0]->start, start);
        blk[count - 1]->end = max(blk[count - 1]->end, end);

        /*
         * Fill any gaps by tracking the previous memblks
         * end address and backfilling to it if needed.
         */
        prev_end = blk[0]->end;
        for (int i = 1; i < count; i++) {
                struct numa_memblk *curr = blk[i];

                if (prev_end >= curr->start) {
                        if (prev_end < curr->end)
                                prev_end = curr->end;
                } else {
                        curr->start = prev_end;
                        prev_end = curr->end;
                }
        }
        return 0;
}




































































































    8 









    8 




    6 









    8 


    8 
























    8 









    8 







    8 
























































    7 







    7 


    7 





    6 




    7 






    7 




















    7 























    7 


    7 



























































































































































































































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
/*
 * Ext4 orphan inode handling
 */
#include <linux/fs.h>
#include <linux/quotaops.h>
#include <linux/buffer_head.h>

#include "ext4.h"
#include "ext4_jbd2.h"

static int ext4_orphan_file_add(handle_t *handle, struct inode *inode)
{
        int i, j, start;
        struct ext4_orphan_info *oi = &EXT4_SB(inode->i_sb)->s_orphan_info;
        int ret = 0;
        bool found = false;
        __le32 *bdata;
        int inodes_per_ob = ext4_inodes_per_orphan_block(inode->i_sb);
        int looped = 0;

        /*
         * Find block with free orphan entry. Use CPU number for a naive hash
         * for a search start in the orphan file
         */
        start = raw_smp_processor_id()*13 % oi->of_blocks;
        i = start;
        do {
                if (atomic_dec_if_positive(&oi->of_binfo[i].ob_free_entries)
                    >= 0) {
                        found = true;
                        break;
                }
                if (++i >= oi->of_blocks)
                        i = 0;
        } while (i != start);

        if (!found) {
                /*
                 * For now we don't grow or shrink orphan file. We just use
                 * whatever was allocated at mke2fs time. The additional
                 * credits we would have to reserve for each orphan inode
                 * operation just don't seem worth it.
                 */
                return -ENOSPC;
        }

        ret = ext4_journal_get_write_access(handle, inode->i_sb,
                                oi->of_binfo[i].ob_bh, EXT4_JTR_ORPHAN_FILE);
        if (ret) {
                atomic_inc(&oi->of_binfo[i].ob_free_entries);
                return ret;
        }

        bdata = (__le32 *)(oi->of_binfo[i].ob_bh->b_data);
        /* Find empty slot in a block */
        j = 0;
        do {
                if (looped) {
                        /*
                         * Did we walk through the block several times without
                         * finding free entry? It is theoretically possible
                         * if entries get constantly allocated and freed or
                         * if the block is corrupted. Avoid indefinite looping
                         * and bail. We'll use orphan list instead.
                         */
                        if (looped > 3) {
                                atomic_inc(&oi->of_binfo[i].ob_free_entries);
                                return -ENOSPC;
                        }
                        cond_resched();
                }
                while (bdata[j]) {
                        if (++j >= inodes_per_ob) {
                                j = 0;
                                looped++;
                        }
                }
        } while (cmpxchg(&bdata[j], (__le32)0, cpu_to_le32(inode->i_ino)) !=
                 (__le32)0);

        EXT4_I(inode)->i_orphan_idx = i * inodes_per_ob + j;
        ext4_set_inode_state(inode, EXT4_STATE_ORPHAN_FILE);

        return ext4_handle_dirty_metadata(handle, NULL, oi->of_binfo[i].ob_bh);
}

/*
 * ext4_orphan_add() links an unlinked or truncated inode into a list of
 * such inodes, starting at the superblock, in case we crash before the
 * file is closed/deleted, or in case the inode truncate spans multiple
 * transactions and the last transaction is not recovered after a crash.
 *
 * At filesystem recovery time, we walk this list deleting unlinked
 * inodes and truncating linked inodes in ext4_orphan_cleanup().
 *
 * Orphan list manipulation functions must be called under i_rwsem unless
 * we are just creating the inode or deleting it.
 */
int ext4_orphan_add(handle_t *handle, struct inode *inode)
{
        struct super_block *sb = inode->i_sb;
        struct ext4_sb_info *sbi = EXT4_SB(sb);
        struct ext4_iloc iloc;
        int err = 0, rc;
        bool dirty = false;

        if (!sbi->s_journal || is_bad_inode(inode))
                return 0;

        WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
                     !inode_is_locked(inode));
        /*
         * Inode orphaned in orphan file or in orphan list?
         */
        if (ext4_test_inode_state(inode, EXT4_STATE_ORPHAN_FILE) ||
            !list_empty(&EXT4_I(inode)->i_orphan))
                return 0;

        /*
         * Orphan handling is only valid for files with data blocks
         * being truncated, or files being unlinked. Note that we either
         * hold i_rwsem, or the inode can not be referenced from outside,
         * so i_nlink should not be bumped due to race
         */
        ASSERT((S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
                  S_ISLNK(inode->i_mode)) || inode->i_nlink == 0);

        if (sbi->s_orphan_info.of_blocks) {
                err = ext4_orphan_file_add(handle, inode);
                /*
                 * Fallback to normal orphan list of orphan file is
                 * out of space
                 */
                if (err != -ENOSPC)
                        return err;
        }

        BUFFER_TRACE(sbi->s_sbh, "get_write_access");
        err = ext4_journal_get_write_access(handle, sb, sbi->s_sbh,
                                            EXT4_JTR_NONE);
        if (err)
                goto out;

        err = ext4_reserve_inode_write(handle, inode, &iloc);
        if (err)
                goto out;

        mutex_lock(&sbi->s_orphan_lock);
        /*
         * Due to previous errors inode may be already a part of on-disk
         * orphan list. If so skip on-disk list modification.
         */
        if (!NEXT_ORPHAN(inode) || NEXT_ORPHAN(inode) >
            (le32_to_cpu(sbi->s_es->s_inodes_count))) {
                /* Insert this inode at the head of the on-disk orphan list */
                NEXT_ORPHAN(inode) = le32_to_cpu(sbi->s_es->s_last_orphan);
                lock_buffer(sbi->s_sbh);
                sbi->s_es->s_last_orphan = cpu_to_le32(inode->i_ino);
                ext4_superblock_csum_set(sb);
                unlock_buffer(sbi->s_sbh);
                dirty = true;
        }
        list_add(&EXT4_I(inode)->i_orphan, &sbi->s_orphan);
        mutex_unlock(&sbi->s_orphan_lock);

        if (dirty) {
                err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
                rc = ext4_mark_iloc_dirty(handle, inode, &iloc);
                if (!err)
                        err = rc;
                if (err) {
                        /*
                         * We have to remove inode from in-memory list if
                         * addition to on disk orphan list failed. Stray orphan
                         * list entries can cause panics at unmount time.
                         */
                        mutex_lock(&sbi->s_orphan_lock);
                        list_del_init(&EXT4_I(inode)->i_orphan);
                        mutex_unlock(&sbi->s_orphan_lock);
                }
        } else
                brelse(iloc.bh);

        ext4_debug("superblock will point to %lu\n", inode->i_ino);
        ext4_debug("orphan inode %lu will point to %d\n",
                        inode->i_ino, NEXT_ORPHAN(inode));
out:
        ext4_std_error(sb, err);
        return err;
}

static int ext4_orphan_file_del(handle_t *handle, struct inode *inode)
{
        struct ext4_orphan_info *oi = &EXT4_SB(inode->i_sb)->s_orphan_info;
        __le32 *bdata;
        int blk, off;
        int inodes_per_ob = ext4_inodes_per_orphan_block(inode->i_sb);
        int ret = 0;

        if (!handle)
                goto out;
        blk = EXT4_I(inode)->i_orphan_idx / inodes_per_ob;
        off = EXT4_I(inode)->i_orphan_idx % inodes_per_ob;
        if (WARN_ON_ONCE(blk >= oi->of_blocks))
                goto out;

        ret = ext4_journal_get_write_access(handle, inode->i_sb,
                                oi->of_binfo[blk].ob_bh, EXT4_JTR_ORPHAN_FILE);
        if (ret)
                goto out;

        bdata = (__le32 *)(oi->of_binfo[blk].ob_bh->b_data);
        bdata[off] = 0;
        atomic_inc(&oi->of_binfo[blk].ob_free_entries);
        ret = ext4_handle_dirty_metadata(handle, NULL, oi->of_binfo[blk].ob_bh);
out:
        ext4_clear_inode_state(inode, EXT4_STATE_ORPHAN_FILE);
        INIT_LIST_HEAD(&EXT4_I(inode)->i_orphan);

        return ret;
}

/*
 * ext4_orphan_del() removes an unlinked or truncated inode from the list
 * of such inodes stored on disk, because it is finally being cleaned up.
 */
int ext4_orphan_del(handle_t *handle, struct inode *inode)
{
        struct list_head *prev;
        struct ext4_inode_info *ei = EXT4_I(inode);
        struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
        __u32 ino_next;
        struct ext4_iloc iloc;
        int err = 0;

        if (!sbi->s_journal && !(sbi->s_mount_state & EXT4_ORPHAN_FS))
                return 0;

        WARN_ON_ONCE(!(inode->i_state & (I_NEW | I_FREEING)) &&
                     !inode_is_locked(inode));
        if (ext4_test_inode_state(inode, EXT4_STATE_ORPHAN_FILE))
                return ext4_orphan_file_del(handle, inode);

        /* Do this quick check before taking global s_orphan_lock. */
        if (list_empty(&ei->i_orphan))
                return 0;

        if (handle) {
                /* Grab inode buffer early before taking global s_orphan_lock */
                err = ext4_reserve_inode_write(handle, inode, &iloc);
        }

        mutex_lock(&sbi->s_orphan_lock);
        ext4_debug("remove inode %lu from orphan list\n", inode->i_ino);

        prev = ei->i_orphan.prev;
        list_del_init(&ei->i_orphan);

        /* If we're on an error path, we may not have a valid
         * transaction handle with which to update the orphan list on
         * disk, but we still need to remove the inode from the linked
         * list in memory. */
        if (!handle || err) {
                mutex_unlock(&sbi->s_orphan_lock);
                goto out_err;
        }

        ino_next = NEXT_ORPHAN(inode);
        if (prev == &sbi->s_orphan) {
                ext4_debug("superblock will point to %u\n", ino_next);
                BUFFER_TRACE(sbi->s_sbh, "get_write_access");
                err = ext4_journal_get_write_access(handle, inode->i_sb,
                                                    sbi->s_sbh, EXT4_JTR_NONE);
                if (err) {
                        mutex_unlock(&sbi->s_orphan_lock);
                        goto out_brelse;
                }
                lock_buffer(sbi->s_sbh);
                sbi->s_es->s_last_orphan = cpu_to_le32(ino_next);
                ext4_superblock_csum_set(inode->i_sb);
                unlock_buffer(sbi->s_sbh);
                mutex_unlock(&sbi->s_orphan_lock);
                err = ext4_handle_dirty_metadata(handle, NULL, sbi->s_sbh);
        } else {
                struct ext4_iloc iloc2;
                struct inode *i_prev =
                        &list_entry(prev, struct ext4_inode_info, i_orphan)->vfs_inode;

                ext4_debug("orphan inode %lu will point to %u\n",
                          i_prev->i_ino, ino_next);
                err = ext4_reserve_inode_write(handle, i_prev, &iloc2);
                if (err) {
                        mutex_unlock(&sbi->s_orphan_lock);
                        goto out_brelse;
                }
                NEXT_ORPHAN(i_prev) = ino_next;
                err = ext4_mark_iloc_dirty(handle, i_prev, &iloc2);
                mutex_unlock(&sbi->s_orphan_lock);
        }
        if (err)
                goto out_brelse;
        NEXT_ORPHAN(inode) = 0;
        err = ext4_mark_iloc_dirty(handle, inode, &iloc);
out_err:
        ext4_std_error(inode->i_sb, err);
        return err;

out_brelse:
        brelse(iloc.bh);
        goto out_err;
}

#ifdef CONFIG_QUOTA
static int ext4_quota_on_mount(struct super_block *sb, int type)
{
        return dquot_quota_on_mount(sb,
                rcu_dereference_protected(EXT4_SB(sb)->s_qf_names[type],
                                          lockdep_is_held(&sb->s_umount)),
                EXT4_SB(sb)->s_jquota_fmt, type);
}
#endif

static void ext4_process_orphan(struct inode *inode,
                                int *nr_truncates, int *nr_orphans)
{
        struct super_block *sb = inode->i_sb;
        int ret;

        dquot_initialize(inode);
        if (inode->i_nlink) {
                if (test_opt(sb, DEBUG))
                        ext4_msg(sb, KERN_DEBUG,
                                "%s: truncating inode %lu to %lld bytes",
                                __func__, inode->i_ino, inode->i_size);
                ext4_debug("truncating inode %lu to %lld bytes\n",
                           inode->i_ino, inode->i_size);
                inode_lock(inode);
                truncate_inode_pages(inode->i_mapping, inode->i_size);
                ret = ext4_truncate(inode);
                if (ret) {
                        /*
                         * We need to clean up the in-core orphan list
                         * manually if ext4_truncate() failed to get a
                         * transaction handle.
                         */
                        ext4_orphan_del(NULL, inode);
                        ext4_std_error(inode->i_sb, ret);
                }
                inode_unlock(inode);
                (*nr_truncates)++;
        } else {
                if (test_opt(sb, DEBUG))
                        ext4_msg(sb, KERN_DEBUG,
                                "%s: deleting unreferenced inode %lu",
                                __func__, inode->i_ino);
                ext4_debug("deleting unreferenced inode %lu\n",
                           inode->i_ino);
                (*nr_orphans)++;
        }
        iput(inode);  /* The delete magic happens here! */
}

/* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at
 * the superblock) which were deleted from all directories, but held open by
 * a process at the time of a crash.  We walk the list and try to delete these
 * inodes at recovery time (only with a read-write filesystem).
 *
 * In order to keep the orphan inode chain consistent during traversal (in
 * case of crash during recovery), we link each inode into the superblock
 * orphan list_head and handle it the same way as an inode deletion during
 * normal operation (which journals the operations for us).
 *
 * We only do an iget() and an iput() on each inode, which is very safe if we
 * accidentally point at an in-use or already deleted inode.  The worst that
 * can happen in this case is that we get a "bit already cleared" message from
 * ext4_free_inode().  The only reason we would point at a wrong inode is if
 * e2fsck was run on this filesystem, and it must have already done the orphan
 * inode cleanup for us, so we can safely abort without any further action.
 */
void ext4_orphan_cleanup(struct super_block *sb, struct ext4_super_block *es)
{
        unsigned int s_flags = sb->s_flags;
        int nr_orphans = 0, nr_truncates = 0;
        struct inode *inode;
        int i, j;
#ifdef CONFIG_QUOTA
        int quota_update = 0;
#endif
        __le32 *bdata;
        struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
        int inodes_per_ob = ext4_inodes_per_orphan_block(sb);

        if (!es->s_last_orphan && !oi->of_blocks) {
                ext4_debug("no orphan inodes to clean up\n");
                return;
        }

        if (bdev_read_only(sb->s_bdev)) {
                ext4_msg(sb, KERN_ERR, "write access "
                        "unavailable, skipping orphan cleanup");
                return;
        }

        /* Check if feature set would not allow a r/w mount */
        if (!ext4_feature_set_ok(sb, 0)) {
                ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to "
                         "unknown ROCOMPAT features");
                return;
        }

        if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
                /* don't clear list on RO mount w/ errors */
                if (es->s_last_orphan && !(s_flags & SB_RDONLY)) {
                        ext4_msg(sb, KERN_INFO, "Errors on filesystem, "
                                  "clearing orphan list.");
                        es->s_last_orphan = 0;
                }
                ext4_debug("Skipping orphan recovery on fs with errors.\n");
                return;
        }

        if (s_flags & SB_RDONLY) {
                ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs");
                sb->s_flags &= ~SB_RDONLY;
        }
#ifdef CONFIG_QUOTA
        /*
         * Turn on quotas which were not enabled for read-only mounts if
         * filesystem has quota feature, so that they are updated correctly.
         */
        if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) {
                int ret = ext4_enable_quotas(sb);

                if (!ret)
                        quota_update = 1;
                else
                        ext4_msg(sb, KERN_ERR,
                                "Cannot turn on quotas: error %d", ret);
        }

        /* Turn on journaled quotas used for old sytle */
        for (i = 0; i < EXT4_MAXQUOTAS; i++) {
                if (EXT4_SB(sb)->s_qf_names[i]) {
                        int ret = ext4_quota_on_mount(sb, i);

                        if (!ret)
                                quota_update = 1;
                        else
                                ext4_msg(sb, KERN_ERR,
                                        "Cannot turn on journaled "
                                        "quota: type %d: error %d", i, ret);
                }
        }
#endif

        while (es->s_last_orphan) {
                /*
                 * We may have encountered an error during cleanup; if
                 * so, skip the rest.
                 */
                if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
                        ext4_debug("Skipping orphan recovery on fs with errors.\n");
                        es->s_last_orphan = 0;
                        break;
                }

                inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan));
                if (IS_ERR(inode)) {
                        es->s_last_orphan = 0;
                        break;
                }

                list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan);
                ext4_process_orphan(inode, &nr_truncates, &nr_orphans);
        }

        for (i = 0; i < oi->of_blocks; i++) {
                bdata = (__le32 *)(oi->of_binfo[i].ob_bh->b_data);
                for (j = 0; j < inodes_per_ob; j++) {
                        if (!bdata[j])
                                continue;
                        inode = ext4_orphan_get(sb, le32_to_cpu(bdata[j]));
                        if (IS_ERR(inode))
                                continue;
                        ext4_set_inode_state(inode, EXT4_STATE_ORPHAN_FILE);
                        EXT4_I(inode)->i_orphan_idx = i * inodes_per_ob + j;
                        ext4_process_orphan(inode, &nr_truncates, &nr_orphans);
                }
        }

#define PLURAL(x) (x), ((x) == 1) ? "" : "s"

        if (nr_orphans)
                ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted",
                       PLURAL(nr_orphans));
        if (nr_truncates)
                ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up",
                       PLURAL(nr_truncates));
#ifdef CONFIG_QUOTA
        /* Turn off quotas if they were enabled for orphan cleanup */
        if (quota_update) {
                for (i = 0; i < EXT4_MAXQUOTAS; i++) {
                        if (sb_dqopt(sb)->files[i])
                                dquot_quota_off(sb, i);
                }
        }
#endif
        sb->s_flags = s_flags; /* Restore SB_RDONLY status */
}

void ext4_release_orphan_info(struct super_block *sb)
{
        int i;
        struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;

        if (!oi->of_blocks)
                return;
        for (i = 0; i < oi->of_blocks; i++)
                brelse(oi->of_binfo[i].ob_bh);
        kfree(oi->of_binfo);
}

static struct ext4_orphan_block_tail *ext4_orphan_block_tail(
                                                struct super_block *sb,
                                                struct buffer_head *bh)
{
        return (struct ext4_orphan_block_tail *)(bh->b_data + sb->s_blocksize -
                                sizeof(struct ext4_orphan_block_tail));
}

static int ext4_orphan_file_block_csum_verify(struct super_block *sb,
                                              struct buffer_head *bh)
{
        __u32 calculated;
        int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
        struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
        struct ext4_orphan_block_tail *ot;
        __le64 dsk_block_nr = cpu_to_le64(bh->b_blocknr);

        if (!ext4_has_metadata_csum(sb))
                return 1;

        ot = ext4_orphan_block_tail(sb, bh);
        calculated = ext4_chksum(EXT4_SB(sb), oi->of_csum_seed,
                                 (__u8 *)&dsk_block_nr, sizeof(dsk_block_nr));
        calculated = ext4_chksum(EXT4_SB(sb), calculated, (__u8 *)bh->b_data,
                                 inodes_per_ob * sizeof(__u32));
        return le32_to_cpu(ot->ob_checksum) == calculated;
}

/* This gets called only when checksumming is enabled */
void ext4_orphan_file_block_trigger(struct jbd2_buffer_trigger_type *triggers,
                                    struct buffer_head *bh,
                                    void *data, size_t size)
{
        struct super_block *sb = EXT4_TRIGGER(triggers)->sb;
        __u32 csum;
        int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
        struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
        struct ext4_orphan_block_tail *ot;
        __le64 dsk_block_nr = cpu_to_le64(bh->b_blocknr);

        csum = ext4_chksum(EXT4_SB(sb), oi->of_csum_seed,
                           (__u8 *)&dsk_block_nr, sizeof(dsk_block_nr));
        csum = ext4_chksum(EXT4_SB(sb), csum, (__u8 *)data,
                           inodes_per_ob * sizeof(__u32));
        ot = ext4_orphan_block_tail(sb, bh);
        ot->ob_checksum = cpu_to_le32(csum);
}

int ext4_init_orphan_info(struct super_block *sb)
{
        struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
        struct inode *inode;
        int i, j;
        int ret;
        int free;
        __le32 *bdata;
        int inodes_per_ob = ext4_inodes_per_orphan_block(sb);
        struct ext4_orphan_block_tail *ot;
        ino_t orphan_ino = le32_to_cpu(EXT4_SB(sb)->s_es->s_orphan_file_inum);

        if (!ext4_has_feature_orphan_file(sb))
                return 0;

        inode = ext4_iget(sb, orphan_ino, EXT4_IGET_SPECIAL);
        if (IS_ERR(inode)) {
                ext4_msg(sb, KERN_ERR, "get orphan inode failed");
                return PTR_ERR(inode);
        }
        oi->of_blocks = inode->i_size >> sb->s_blocksize_bits;
        oi->of_csum_seed = EXT4_I(inode)->i_csum_seed;
        oi->of_binfo = kmalloc(oi->of_blocks*sizeof(struct ext4_orphan_block),
                               GFP_KERNEL);
        if (!oi->of_binfo) {
                ret = -ENOMEM;
                goto out_put;
        }
        for (i = 0; i < oi->of_blocks; i++) {
                oi->of_binfo[i].ob_bh = ext4_bread(NULL, inode, i, 0);
                if (IS_ERR(oi->of_binfo[i].ob_bh)) {
                        ret = PTR_ERR(oi->of_binfo[i].ob_bh);
                        goto out_free;
                }
                if (!oi->of_binfo[i].ob_bh) {
                        ret = -EIO;
                        goto out_free;
                }
                ot = ext4_orphan_block_tail(sb, oi->of_binfo[i].ob_bh);
                if (le32_to_cpu(ot->ob_magic) != EXT4_ORPHAN_BLOCK_MAGIC) {
                        ext4_error(sb, "orphan file block %d: bad magic", i);
                        ret = -EIO;
                        goto out_free;
                }
                if (!ext4_orphan_file_block_csum_verify(sb,
                                                oi->of_binfo[i].ob_bh)) {
                        ext4_error(sb, "orphan file block %d: bad checksum", i);
                        ret = -EIO;
                        goto out_free;
                }
                bdata = (__le32 *)(oi->of_binfo[i].ob_bh->b_data);
                free = 0;
                for (j = 0; j < inodes_per_ob; j++)
                        if (bdata[j] == 0)
                                free++;
                atomic_set(&oi->of_binfo[i].ob_free_entries, free);
        }
        iput(inode);
        return 0;
out_free:
        for (i--; i >= 0; i--)
                brelse(oi->of_binfo[i].ob_bh);
        kfree(oi->of_binfo);
out_put:
        iput(inode);
        return ret;
}

int ext4_orphan_file_empty(struct super_block *sb)
{
        struct ext4_orphan_info *oi = &EXT4_SB(sb)->s_orphan_info;
        int i;
        int inodes_per_ob = ext4_inodes_per_orphan_block(sb);

        if (!ext4_has_feature_orphan_file(sb))
                return 1;
        for (i = 0; i < oi->of_blocks; i++)
                if (atomic_read(&oi->of_binfo[i].ob_free_entries) !=
                    inodes_per_ob)
                        return 0;
        return 1;
}























































    4 
































































































































































































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/fs/fat/misc.c
 *
 *  Written 1992,1993 by Werner Almesberger
 *  22/11/2000 - Fixed fat_date_unix2dos for dates earlier than 01/01/1980
 *                 and date_dos2unix for date==0 by Igor Zhbanov(bsg@uniyar.ac.ru)
 */

#include "fat.h"
#include <linux/iversion.h>

/*
 * fat_fs_error reports a file system problem that might indicate fa data
 * corruption/inconsistency. Depending on 'errors' mount option the
 * panic() is called, or error message is printed FAT and nothing is done,
 * or filesystem is remounted read-only (default behavior).
 * In case the file system is remounted read-only, it can be made writable
 * again by remounting it.
 */
void __fat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
{
        struct fat_mount_options *opts = &MSDOS_SB(sb)->options;
        va_list args;
        struct va_format vaf;

        if (report) {
                va_start(args, fmt);
                vaf.fmt = fmt;
                vaf.va = &args;
                fat_msg(sb, KERN_ERR, "error, %pV", &vaf);
                va_end(args);
        }

        if (opts->errors == FAT_ERRORS_PANIC)
                panic("FAT-fs (%s): fs panic from previous error\n", sb->s_id);
        else if (opts->errors == FAT_ERRORS_RO && !sb_rdonly(sb)) {
                sb->s_flags |= SB_RDONLY;
                fat_msg(sb, KERN_ERR, "Filesystem has been set read-only");
        }
}
EXPORT_SYMBOL_GPL(__fat_fs_error);

/**
 * _fat_msg() - Print a preformatted FAT message based on a superblock.
 * @sb: A pointer to a &struct super_block
 * @level: A Kernel printk level constant
 * @fmt: The printf-style format string to print.
 *
 * Everything that is not fat_fs_error() should be fat_msg().
 *
 * fat_msg() wraps _fat_msg() for printk indexing.
 */
void _fat_msg(struct super_block *sb, const char *level, const char *fmt, ...)
{
        struct va_format vaf;
        va_list args;

        va_start(args, fmt);
        vaf.fmt = fmt;
        vaf.va = &args;
        _printk(FAT_PRINTK_PREFIX "%pV\n", level, sb->s_id, &vaf);
        va_end(args);
}

/* Flushes the number of free clusters on FAT32 */
/* XXX: Need to write one per FSINFO block.  Currently only writes 1 */
int fat_clusters_flush(struct super_block *sb)
{
        struct msdos_sb_info *sbi = MSDOS_SB(sb);
        struct buffer_head *bh;
        struct fat_boot_fsinfo *fsinfo;

        if (!is_fat32(sbi))
                return 0;

        bh = sb_bread(sb, sbi->fsinfo_sector);
        if (bh == NULL) {
                fat_msg(sb, KERN_ERR, "bread failed in fat_clusters_flush");
                return -EIO;
        }

        fsinfo = (struct fat_boot_fsinfo *)bh->b_data;
        /* Sanity check */
        if (!IS_FSINFO(fsinfo)) {
                fat_msg(sb, KERN_ERR, "Invalid FSINFO signature: "
                       "0x%08x, 0x%08x (sector = %lu)",
                       le32_to_cpu(fsinfo->signature1),
                       le32_to_cpu(fsinfo->signature2),
                       sbi->fsinfo_sector);
        } else {
                if (sbi->free_clusters != -1)
                        fsinfo->free_clusters = cpu_to_le32(sbi->free_clusters);
                if (sbi->prev_free != -1)
                        fsinfo->next_cluster = cpu_to_le32(sbi->prev_free);
                mark_buffer_dirty(bh);
        }
        brelse(bh);

        return 0;
}

/*
 * fat_chain_add() adds a new cluster to the chain of clusters represented
 * by inode.
 */
int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster)
{
        struct super_block *sb = inode->i_sb;
        struct msdos_sb_info *sbi = MSDOS_SB(sb);
        int ret, new_fclus, last;

        /*
         * We must locate the last cluster of the file to add this new
         * one (new_dclus) to the end of the link list (the FAT).
         */
        last = new_fclus = 0;
        if (MSDOS_I(inode)->i_start) {
                int fclus, dclus;

                ret = fat_get_cluster(inode, FAT_ENT_EOF, &fclus, &dclus);
                if (ret < 0)
                        return ret;
                new_fclus = fclus + 1;
                last = dclus;
        }

        /* add new one to the last of the cluster chain */
        if (last) {
                struct fat_entry fatent;

                fatent_init(&fatent);
                ret = fat_ent_read(inode, &fatent, last);
                if (ret >= 0) {
                        int wait = inode_needs_sync(inode);
                        ret = fat_ent_write(inode, &fatent, new_dclus, wait);
                        fatent_brelse(&fatent);
                }
                if (ret < 0)
                        return ret;
                /*
                 * FIXME:Although we can add this cache, fat_cache_add() is
                 * assuming to be called after linear search with fat_cache_id.
                 */
//                fat_cache_add(inode, new_fclus, new_dclus);
        } else {
                MSDOS_I(inode)->i_start = new_dclus;
                MSDOS_I(inode)->i_logstart = new_dclus;
                /*
                 * Since generic_write_sync() synchronizes regular files later,
                 * we sync here only directories.
                 */
                if (S_ISDIR(inode->i_mode) && IS_DIRSYNC(inode)) {
                        ret = fat_sync_inode(inode);
                        if (ret)
                                return ret;
                } else
                        mark_inode_dirty(inode);
        }
        if (new_fclus != (inode->i_blocks >> (sbi->cluster_bits - 9))) {
                fat_fs_error(sb, "clusters badly computed (%d != %llu)",
                             new_fclus,
                             (llu)(inode->i_blocks >> (sbi->cluster_bits - 9)));
                fat_cache_inval_inode(inode);
        }
        inode->i_blocks += nr_cluster << (sbi->cluster_bits - 9);

        return 0;
}

/*
 * The epoch of FAT timestamp is 1980.
 *     :  bits :     value
 * date:  0 -  4: day        (1 -  31)
 * date:  5 -  8: month        (1 -  12)
 * date:  9 - 15: year        (0 - 127) from 1980
 * time:  0 -  4: sec        (0 -  29) 2sec counts
 * time:  5 - 10: min        (0 -  59)
 * time: 11 - 15: hour        (0 -  23)
 */
#define SECS_PER_MIN        60
#define SECS_PER_HOUR        (60 * 60)
#define SECS_PER_DAY        (SECS_PER_HOUR * 24)
/* days between 1.1.70 and 1.1.80 (2 leap days) */
#define DAYS_DELTA        (365 * 10 + 2)
/* 120 (2100 - 1980) isn't leap year */
#define YEAR_2100        120
#define IS_LEAP_YEAR(y)        (!((y) & 3) && (y) != YEAR_2100)

/* Linear day numbers of the respective 1sts in non-leap years. */
static long days_in_year[] = {
        /* Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec */
        0,   0,  31,  59,  90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0,
};

static inline int fat_tz_offset(const struct msdos_sb_info *sbi)
{
        return (sbi->options.tz_set ?
               -sbi->options.time_offset :
               sys_tz.tz_minuteswest) * SECS_PER_MIN;
}

/* Convert a FAT time/date pair to a UNIX date (seconds since 1 1 70). */
void fat_time_fat2unix(struct msdos_sb_info *sbi, struct timespec64 *ts,
                       __le16 __time, __le16 __date, u8 time_cs)
{
        u16 time = le16_to_cpu(__time), date = le16_to_cpu(__date);
        time64_t second;
        long day, leap_day, month, year;

        year  = date >> 9;
        month = max(1, (date >> 5) & 0xf);
        day   = max(1, date & 0x1f) - 1;

        leap_day = (year + 3) / 4;
        if (year > YEAR_2100)                /* 2100 isn't leap year */
                leap_day--;
        if (IS_LEAP_YEAR(year) && month > 2)
                leap_day++;

        second =  (time & 0x1f) << 1;
        second += ((time >> 5) & 0x3f) * SECS_PER_MIN;
        second += (time >> 11) * SECS_PER_HOUR;
        second += (time64_t)(year * 365 + leap_day
                   + days_in_year[month] + day
                   + DAYS_DELTA) * SECS_PER_DAY;

        second += fat_tz_offset(sbi);

        if (time_cs) {
                ts->tv_sec = second + (time_cs / 100);
                ts->tv_nsec = (time_cs % 100) * 10000000;
        } else {
                ts->tv_sec = second;
                ts->tv_nsec = 0;
        }
}

/* Export fat_time_fat2unix() for the fat_test KUnit tests. */
EXPORT_SYMBOL_GPL(fat_time_fat2unix);

/* Convert linear UNIX date to a FAT time/date pair. */
void fat_time_unix2fat(struct msdos_sb_info *sbi, struct timespec64 *ts,
                       __le16 *time, __le16 *date, u8 *time_cs)
{
        struct tm tm;
        time64_to_tm(ts->tv_sec, -fat_tz_offset(sbi), &tm);

        /*  FAT can only support year between 1980 to 2107 */
        if (tm.tm_year < 1980 - 1900) {
                *time = 0;
                *date = cpu_to_le16((0 << 9) | (1 << 5) | 1);
                if (time_cs)
                        *time_cs = 0;
                return;
        }
        if (tm.tm_year > 2107 - 1900) {
                *time = cpu_to_le16((23 << 11) | (59 << 5) | 29);
                *date = cpu_to_le16((127 << 9) | (12 << 5) | 31);
                if (time_cs)
                        *time_cs = 199;
                return;
        }

        /* from 1900 -> from 1980 */
        tm.tm_year -= 80;
        /* 0~11 -> 1~12 */
        tm.tm_mon++;
        /* 0~59 -> 0~29(2sec counts) */
        tm.tm_sec >>= 1;

        *time = cpu_to_le16(tm.tm_hour << 11 | tm.tm_min << 5 | tm.tm_sec);
        *date = cpu_to_le16(tm.tm_year << 9 | tm.tm_mon << 5 | tm.tm_mday);
        if (time_cs)
                *time_cs = (ts->tv_sec & 1) * 100 + ts->tv_nsec / 10000000;
}
EXPORT_SYMBOL_GPL(fat_time_unix2fat);

static inline struct timespec64 fat_timespec64_trunc_2secs(struct timespec64 ts)
{
        return (struct timespec64){ ts.tv_sec & ~1ULL, 0 };
}

/*
 * truncate atime to 24 hour granularity (00:00:00 in local timezone)
 */
struct timespec64 fat_truncate_atime(const struct msdos_sb_info *sbi,
                                     const struct timespec64 *ts)
{
        /* to localtime */
        time64_t seconds = ts->tv_sec - fat_tz_offset(sbi);
        s32 remainder;

        div_s64_rem(seconds, SECS_PER_DAY, &remainder);
        /* to day boundary, and back to unix time */
        seconds = seconds + fat_tz_offset(sbi) - remainder;

        return (struct timespec64){ seconds, 0 };
}

/*
 * truncate mtime to 2 second granularity
 */
struct timespec64 fat_truncate_mtime(const struct msdos_sb_info *sbi,
                                     const struct timespec64 *ts)
{
        return fat_timespec64_trunc_2secs(*ts);
}

/*
 * truncate the various times with appropriate granularity:
 *   all times in root node are always 0
 */
int fat_truncate_time(struct inode *inode, struct timespec64 *now, int flags)
{
        struct msdos_sb_info *sbi = MSDOS_SB(inode->i_sb);
        struct timespec64 ts;

        if (inode->i_ino == MSDOS_ROOT_INO)
                return 0;

        if (now == NULL) {
                now = &ts;
                ts = current_time(inode);
        }

        if (flags & S_ATIME)
                inode_set_atime_to_ts(inode, fat_truncate_atime(sbi, now));
        /*
         * ctime and mtime share the same on-disk field, and should be
         * identical in memory. all mtime updates will be applied to ctime,
         * but ctime updates are ignored.
         */
        if (flags & S_MTIME)
                inode_set_mtime_to_ts(inode,
                                      inode_set_ctime_to_ts(inode, fat_truncate_mtime(sbi, now)));

        return 0;
}
EXPORT_SYMBOL_GPL(fat_truncate_time);

int fat_update_time(struct inode *inode, int flags)
{
        int dirty_flags = 0;

        if (inode->i_ino == MSDOS_ROOT_INO)
                return 0;

        if (flags & (S_ATIME | S_CTIME | S_MTIME)) {
                fat_truncate_time(inode, NULL, flags);
                if (inode->i_sb->s_flags & SB_LAZYTIME)
                        dirty_flags |= I_DIRTY_TIME;
                else
                        dirty_flags |= I_DIRTY_SYNC;
        }

        __mark_inode_dirty(inode, dirty_flags);
        return 0;
}
EXPORT_SYMBOL_GPL(fat_update_time);

int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs)
{
        int i, err = 0;

        for (i = 0; i < nr_bhs; i++)
                write_dirty_buffer(bhs[i], 0);

        for (i = 0; i < nr_bhs; i++) {
                wait_on_buffer(bhs[i]);
                if (!err && !buffer_uptodate(bhs[i]))
                        err = -EIO;
        }
        return err;
}




















































































































































































































  107 











  107 

































































































































































  107 


























































































































  107 















  126 






  126 








  125 




























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































  128 



















  130 

  125 
   35 

















  130 

  130 



















































































































    2 




    1 





    2 
    2 









    1 



    2 






















































































































































































































































































































































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
// SPDX-License-Identifier: GPL-2.0-only
/*
 * v4l2-tpg-core.c - Test Pattern Generator
 *
 * Note: gen_twopix and tpg_gen_text are based on code from vivi.c. See the
 * vivi.c source for the copyright information of those functions.
 *
 * Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
 */

#include <linux/module.h>
#include <media/tpg/v4l2-tpg.h>

/* Must remain in sync with enum tpg_pattern */
const char * const tpg_pattern_strings[] = {
        "75% Colorbar",
        "100% Colorbar",
        "CSC Colorbar",
        "Horizontal 100% Colorbar",
        "100% Color Squares",
        "100% Black",
        "100% White",
        "100% Red",
        "100% Green",
        "100% Blue",
        "16x16 Checkers",
        "2x2 Checkers",
        "1x1 Checkers",
        "2x2 Red/Green Checkers",
        "1x1 Red/Green Checkers",
        "Alternating Hor Lines",
        "Alternating Vert Lines",
        "One Pixel Wide Cross",
        "Two Pixels Wide Cross",
        "Ten Pixels Wide Cross",
        "Gray Ramp",
        "Noise",
        NULL
};
EXPORT_SYMBOL_GPL(tpg_pattern_strings);

/* Must remain in sync with enum tpg_aspect */
const char * const tpg_aspect_strings[] = {
        "Source Width x Height",
        "4x3",
        "14x9",
        "16x9",
        "16x9 Anamorphic",
        NULL
};
EXPORT_SYMBOL_GPL(tpg_aspect_strings);

/*
 * Sine table: sin[0] = 127 * sin(-180 degrees)
 *             sin[128] = 127 * sin(0 degrees)
 *             sin[256] = 127 * sin(180 degrees)
 */
static const s8 sin[257] = {
           0,   -4,   -7,  -11,  -13,  -18,  -20,  -22,  -26,  -29,  -33,  -35,  -37,  -41,  -43,  -48,
         -50,  -52,  -56,  -58,  -62,  -63,  -65,  -69,  -71,  -75,  -76,  -78,  -82,  -83,  -87,  -88,
         -90,  -93,  -94,  -97,  -99, -101, -103, -104, -107, -108, -110, -111, -112, -114, -115, -117,
        -118, -119, -120, -121, -122, -123, -123, -124, -125, -125, -126, -126, -127, -127, -127, -127,
        -127, -127, -127, -127, -126, -126, -125, -125, -124, -124, -123, -122, -121, -120, -119, -118,
        -117, -116, -114, -113, -111, -110, -109, -107, -105, -103, -101, -100,  -97,  -96,  -93,  -91,
         -90,  -87,  -85,  -82,  -80,  -76,  -75,  -73,  -69,  -67,  -63,  -62,  -60,  -56,  -54,  -50,
         -48,  -46,  -41,  -39,  -35,  -33,  -31,  -26,  -24,  -20,  -18,  -15,  -11,   -9,   -4,   -2,
           0,    2,    4,    9,   11,   15,   18,   20,   24,   26,   31,   33,   35,   39,   41,   46,
          48,   50,   54,   56,   60,   62,   64,   67,   69,   73,   75,   76,   80,   82,   85,   87,
          90,   91,   93,   96,   97,  100,  101,  103,  105,  107,  109,  110,  111,  113,  114,  116,
         117,  118,  119,  120,  121,  122,  123,  124,  124,  125,  125,  126,  126,  127,  127,  127,
         127,  127,  127,  127,  127,  126,  126,  125,  125,  124,  123,  123,  122,  121,  120,  119,
         118,  117,  115,  114,  112,  111,  110,  108,  107,  104,  103,  101,   99,   97,   94,   93,
          90,   88,   87,   83,   82,   78,   76,   75,   71,   69,   65,   64,   62,   58,   56,   52,
          50,   48,   43,   41,   37,   35,   33,   29,   26,   22,   20,   18,   13,   11,    7,    4,
           0,
};

#define cos(idx) sin[((idx) + 64) % sizeof(sin)]

/* Global font descriptor */
static const u8 *font8x16;

void tpg_set_font(const u8 *f)
{
        font8x16 = f;
}
EXPORT_SYMBOL_GPL(tpg_set_font);

void tpg_init(struct tpg_data *tpg, unsigned w, unsigned h)
{
        memset(tpg, 0, sizeof(*tpg));
        tpg->scaled_width = tpg->src_width = w;
        tpg->src_height = tpg->buf_height = h;
        tpg->crop.width = tpg->compose.width = w;
        tpg->crop.height = tpg->compose.height = h;
        tpg->recalc_colors = true;
        tpg->recalc_square_border = true;
        tpg->brightness = 128;
        tpg->contrast = 128;
        tpg->saturation = 128;
        tpg->hue = 0;
        tpg->mv_hor_mode = TPG_MOVE_NONE;
        tpg->mv_vert_mode = TPG_MOVE_NONE;
        tpg->field = V4L2_FIELD_NONE;
        tpg_s_fourcc(tpg, V4L2_PIX_FMT_RGB24);
        tpg->colorspace = V4L2_COLORSPACE_SRGB;
        tpg->perc_fill = 100;
        tpg->hsv_enc = V4L2_HSV_ENC_180;
}
EXPORT_SYMBOL_GPL(tpg_init);

int tpg_alloc(struct tpg_data *tpg, unsigned max_w)
{
        unsigned pat;
        unsigned plane;
        int ret = 0;

        tpg->max_line_width = max_w;
        for (pat = 0; pat < TPG_MAX_PAT_LINES; pat++) {
                for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
                        unsigned pixelsz = plane ? 2 : 4;

                        tpg->lines[pat][plane] =
                                vzalloc(array3_size(max_w, 2, pixelsz));
                        if (!tpg->lines[pat][plane]) {
                                ret = -ENOMEM;
                                goto free_lines;
                        }
                        if (plane == 0)
                                continue;
                        tpg->downsampled_lines[pat][plane] =
                                vzalloc(array3_size(max_w, 2, pixelsz));
                        if (!tpg->downsampled_lines[pat][plane]) {
                                ret = -ENOMEM;
                                goto free_lines;
                        }
                }
        }
        for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
                unsigned pixelsz = plane ? 2 : 4;

                tpg->contrast_line[plane] =
                        vzalloc(array_size(pixelsz, max_w));
                if (!tpg->contrast_line[plane]) {
                        ret = -ENOMEM;
                        goto free_contrast_line;
                }
                tpg->black_line[plane] =
                        vzalloc(array_size(pixelsz, max_w));
                if (!tpg->black_line[plane]) {
                        ret = -ENOMEM;
                        goto free_contrast_line;
                }
                tpg->random_line[plane] =
                        vzalloc(array3_size(max_w, 2, pixelsz));
                if (!tpg->random_line[plane]) {
                        ret = -ENOMEM;
                        goto free_contrast_line;
                }
        }
        return 0;

free_contrast_line:
        for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
                vfree(tpg->contrast_line[plane]);
                vfree(tpg->black_line[plane]);
                vfree(tpg->random_line[plane]);
                tpg->contrast_line[plane] = NULL;
                tpg->black_line[plane] = NULL;
                tpg->random_line[plane] = NULL;
        }
free_lines:
        for (pat = 0; pat < TPG_MAX_PAT_LINES; pat++)
                for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
                        vfree(tpg->lines[pat][plane]);
                        tpg->lines[pat][plane] = NULL;
                        if (plane == 0)
                                continue;
                        vfree(tpg->downsampled_lines[pat][plane]);
                        tpg->downsampled_lines[pat][plane] = NULL;
                }
        return ret;
}
EXPORT_SYMBOL_GPL(tpg_alloc);

void tpg_free(struct tpg_data *tpg)
{
        unsigned pat;
        unsigned plane;

        for (pat = 0; pat < TPG_MAX_PAT_LINES; pat++)
                for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
                        vfree(tpg->lines[pat][plane]);
                        tpg->lines[pat][plane] = NULL;
                        if (plane == 0)
                                continue;
                        vfree(tpg->downsampled_lines[pat][plane]);
                        tpg->downsampled_lines[pat][plane] = NULL;
                }
        for (plane = 0; plane < TPG_MAX_PLANES; plane++) {
                vfree(tpg->contrast_line[plane]);
                vfree(tpg->black_line[plane]);
                vfree(tpg->random_line[plane]);
                tpg->contrast_line[plane] = NULL;
                tpg->black_line[plane] = NULL;
                tpg->random_line[plane] = NULL;
        }
}
EXPORT_SYMBOL_GPL(tpg_free);

bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
{
        tpg->fourcc = fourcc;
        tpg->planes = 1;
        tpg->buffers = 1;
        tpg->recalc_colors = true;
        tpg->interleaved = false;
        tpg->vdownsampling[0] = 1;
        tpg->hdownsampling[0] = 1;
        tpg->hmask[0] = ~0;
        tpg->hmask[1] = ~0;
        tpg->hmask[2] = ~0;

        switch (fourcc) {
        case V4L2_PIX_FMT_SBGGR8:
        case V4L2_PIX_FMT_SGBRG8:
        case V4L2_PIX_FMT_SGRBG8:
        case V4L2_PIX_FMT_SRGGB8:
        case V4L2_PIX_FMT_SBGGR10:
        case V4L2_PIX_FMT_SGBRG10:
        case V4L2_PIX_FMT_SGRBG10:
        case V4L2_PIX_FMT_SRGGB10:
        case V4L2_PIX_FMT_SBGGR12:
        case V4L2_PIX_FMT_SGBRG12:
        case V4L2_PIX_FMT_SGRBG12:
        case V4L2_PIX_FMT_SRGGB12:
        case V4L2_PIX_FMT_SBGGR16:
        case V4L2_PIX_FMT_SGBRG16:
        case V4L2_PIX_FMT_SGRBG16:
        case V4L2_PIX_FMT_SRGGB16:
                tpg->interleaved = true;
                tpg->vdownsampling[1] = 1;
                tpg->hdownsampling[1] = 1;
                tpg->planes = 2;
                fallthrough;
        case V4L2_PIX_FMT_RGB332:
        case V4L2_PIX_FMT_RGB565:
        case V4L2_PIX_FMT_RGB565X:
        case V4L2_PIX_FMT_RGB444:
        case V4L2_PIX_FMT_XRGB444:
        case V4L2_PIX_FMT_ARGB444:
        case V4L2_PIX_FMT_RGBX444:
        case V4L2_PIX_FMT_RGBA444:
        case V4L2_PIX_FMT_XBGR444:
        case V4L2_PIX_FMT_ABGR444:
        case V4L2_PIX_FMT_BGRX444:
        case V4L2_PIX_FMT_BGRA444:
        case V4L2_PIX_FMT_RGB555:
        case V4L2_PIX_FMT_XRGB555:
        case V4L2_PIX_FMT_ARGB555:
        case V4L2_PIX_FMT_RGBX555:
        case V4L2_PIX_FMT_RGBA555:
        case V4L2_PIX_FMT_XBGR555:
        case V4L2_PIX_FMT_ABGR555:
        case V4L2_PIX_FMT_BGRX555:
        case V4L2_PIX_FMT_BGRA555:
        case V4L2_PIX_FMT_RGB555X:
        case V4L2_PIX_FMT_XRGB555X:
        case V4L2_PIX_FMT_ARGB555X:
        case V4L2_PIX_FMT_BGR666:
        case V4L2_PIX_FMT_RGB24:
        case V4L2_PIX_FMT_BGR24:
        case V4L2_PIX_FMT_RGB32:
        case V4L2_PIX_FMT_BGR32:
        case V4L2_PIX_FMT_XRGB32:
        case V4L2_PIX_FMT_XBGR32:
        case V4L2_PIX_FMT_ARGB32:
        case V4L2_PIX_FMT_ABGR32:
        case V4L2_PIX_FMT_RGBX32:
        case V4L2_PIX_FMT_BGRX32:
        case V4L2_PIX_FMT_RGBA32:
        case V4L2_PIX_FMT_BGRA32:
                tpg->color_enc = TGP_COLOR_ENC_RGB;
                break;
        case V4L2_PIX_FMT_GREY:
        case V4L2_PIX_FMT_Y10:
        case V4L2_PIX_FMT_Y12:
        case V4L2_PIX_FMT_Y16:
        case V4L2_PIX_FMT_Y16_BE:
        case V4L2_PIX_FMT_Z16:
                tpg->color_enc = TGP_COLOR_ENC_LUMA;
                break;
        case V4L2_PIX_FMT_YUV444:
        case V4L2_PIX_FMT_YUV555:
        case V4L2_PIX_FMT_YUV565:
        case V4L2_PIX_FMT_YUV32:
        case V4L2_PIX_FMT_AYUV32:
        case V4L2_PIX_FMT_XYUV32:
        case V4L2_PIX_FMT_VUYA32:
        case V4L2_PIX_FMT_VUYX32:
        case V4L2_PIX_FMT_YUVA32:
        case V4L2_PIX_FMT_YUVX32:
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_YUV420M:
        case V4L2_PIX_FMT_YVU420M:
                tpg->buffers = 3;
                fallthrough;
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YVU420:
                tpg->vdownsampling[1] = 2;
                tpg->vdownsampling[2] = 2;
                tpg->hdownsampling[1] = 2;
                tpg->hdownsampling[2] = 2;
                tpg->planes = 3;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_YUV422M:
        case V4L2_PIX_FMT_YVU422M:
                tpg->buffers = 3;
                fallthrough;
        case V4L2_PIX_FMT_YUV422P:
                tpg->vdownsampling[1] = 1;
                tpg->vdownsampling[2] = 1;
                tpg->hdownsampling[1] = 2;
                tpg->hdownsampling[2] = 2;
                tpg->planes = 3;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_NV16M:
        case V4L2_PIX_FMT_NV61M:
                tpg->buffers = 2;
                fallthrough;
        case V4L2_PIX_FMT_NV16:
        case V4L2_PIX_FMT_NV61:
                tpg->vdownsampling[1] = 1;
                tpg->hdownsampling[1] = 1;
                tpg->hmask[1] = ~1;
                tpg->planes = 2;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_NV12M:
        case V4L2_PIX_FMT_NV21M:
                tpg->buffers = 2;
                fallthrough;
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_NV21:
                tpg->vdownsampling[1] = 2;
                tpg->hdownsampling[1] = 1;
                tpg->hmask[1] = ~1;
                tpg->planes = 2;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_YUV444M:
        case V4L2_PIX_FMT_YVU444M:
                tpg->buffers = 3;
                tpg->planes = 3;
                tpg->vdownsampling[1] = 1;
                tpg->vdownsampling[2] = 1;
                tpg->hdownsampling[1] = 1;
                tpg->hdownsampling[2] = 1;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_NV24:
        case V4L2_PIX_FMT_NV42:
                tpg->vdownsampling[1] = 1;
                tpg->hdownsampling[1] = 1;
                tpg->planes = 2;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_YUYV:
        case V4L2_PIX_FMT_UYVY:
        case V4L2_PIX_FMT_YVYU:
        case V4L2_PIX_FMT_VYUY:
                tpg->hmask[0] = ~1;
                tpg->color_enc = TGP_COLOR_ENC_YCBCR;
                break;
        case V4L2_PIX_FMT_HSV24:
        case V4L2_PIX_FMT_HSV32:
                tpg->color_enc = TGP_COLOR_ENC_HSV;
                break;
        default:
                return false;
        }

        switch (fourcc) {
        case V4L2_PIX_FMT_GREY:
        case V4L2_PIX_FMT_RGB332:
                tpg->twopixelsize[0] = 2;
                break;
        case V4L2_PIX_FMT_RGB565:
        case V4L2_PIX_FMT_RGB565X:
        case V4L2_PIX_FMT_RGB444:
        case V4L2_PIX_FMT_XRGB444:
        case V4L2_PIX_FMT_ARGB444:
        case V4L2_PIX_FMT_RGBX444:
        case V4L2_PIX_FMT_RGBA444:
        case V4L2_PIX_FMT_XBGR444:
        case V4L2_PIX_FMT_ABGR444:
        case V4L2_PIX_FMT_BGRX444:
        case V4L2_PIX_FMT_BGRA444:
        case V4L2_PIX_FMT_RGB555:
        case V4L2_PIX_FMT_XRGB555:
        case V4L2_PIX_FMT_ARGB555:
        case V4L2_PIX_FMT_RGBX555:
        case V4L2_PIX_FMT_RGBA555:
        case V4L2_PIX_FMT_XBGR555:
        case V4L2_PIX_FMT_ABGR555:
        case V4L2_PIX_FMT_BGRX555:
        case V4L2_PIX_FMT_BGRA555:
        case V4L2_PIX_FMT_RGB555X:
        case V4L2_PIX_FMT_XRGB555X:
        case V4L2_PIX_FMT_ARGB555X:
        case V4L2_PIX_FMT_YUYV:
        case V4L2_PIX_FMT_UYVY:
        case V4L2_PIX_FMT_YVYU:
        case V4L2_PIX_FMT_VYUY:
        case V4L2_PIX_FMT_YUV444:
        case V4L2_PIX_FMT_YUV555:
        case V4L2_PIX_FMT_YUV565:
        case V4L2_PIX_FMT_Y10:
        case V4L2_PIX_FMT_Y12:
        case V4L2_PIX_FMT_Y16:
        case V4L2_PIX_FMT_Y16_BE:
        case V4L2_PIX_FMT_Z16:
                tpg->twopixelsize[0] = 2 * 2;
                break;
        case V4L2_PIX_FMT_RGB24:
        case V4L2_PIX_FMT_BGR24:
        case V4L2_PIX_FMT_HSV24:
                tpg->twopixelsize[0] = 2 * 3;
                break;
        case V4L2_PIX_FMT_BGR666:
        case V4L2_PIX_FMT_RGB32:
        case V4L2_PIX_FMT_BGR32:
        case V4L2_PIX_FMT_XRGB32:
        case V4L2_PIX_FMT_XBGR32:
        case V4L2_PIX_FMT_ARGB32:
        case V4L2_PIX_FMT_ABGR32:
        case V4L2_PIX_FMT_RGBX32:
        case V4L2_PIX_FMT_BGRX32:
        case V4L2_PIX_FMT_RGBA32:
        case V4L2_PIX_FMT_BGRA32:
        case V4L2_PIX_FMT_YUV32:
        case V4L2_PIX_FMT_AYUV32:
        case V4L2_PIX_FMT_XYUV32:
        case V4L2_PIX_FMT_VUYA32:
        case V4L2_PIX_FMT_VUYX32:
        case V4L2_PIX_FMT_YUVA32:
        case V4L2_PIX_FMT_YUVX32:
        case V4L2_PIX_FMT_HSV32:
                tpg->twopixelsize[0] = 2 * 4;
                break;
        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_NV21:
        case V4L2_PIX_FMT_NV12M:
        case V4L2_PIX_FMT_NV21M:
        case V4L2_PIX_FMT_NV16:
        case V4L2_PIX_FMT_NV61:
        case V4L2_PIX_FMT_NV16M:
        case V4L2_PIX_FMT_NV61M:
        case V4L2_PIX_FMT_SBGGR8:
        case V4L2_PIX_FMT_SGBRG8:
        case V4L2_PIX_FMT_SGRBG8:
        case V4L2_PIX_FMT_SRGGB8:
                tpg->twopixelsize[0] = 2;
                tpg->twopixelsize[1] = 2;
                break;
        case V4L2_PIX_FMT_SRGGB10:
        case V4L2_PIX_FMT_SGRBG10:
        case V4L2_PIX_FMT_SGBRG10:
        case V4L2_PIX_FMT_SBGGR10:
        case V4L2_PIX_FMT_SRGGB12:
        case V4L2_PIX_FMT_SGRBG12:
        case V4L2_PIX_FMT_SGBRG12:
        case V4L2_PIX_FMT_SBGGR12:
        case V4L2_PIX_FMT_SRGGB16:
        case V4L2_PIX_FMT_SGRBG16:
        case V4L2_PIX_FMT_SGBRG16:
        case V4L2_PIX_FMT_SBGGR16:
                tpg->twopixelsize[0] = 4;
                tpg->twopixelsize[1] = 4;
                break;
        case V4L2_PIX_FMT_YUV444M:
        case V4L2_PIX_FMT_YVU444M:
        case V4L2_PIX_FMT_YUV422M:
        case V4L2_PIX_FMT_YVU422M:
        case V4L2_PIX_FMT_YUV422P:
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YVU420:
        case V4L2_PIX_FMT_YUV420M:
        case V4L2_PIX_FMT_YVU420M:
                tpg->twopixelsize[0] = 2;
                tpg->twopixelsize[1] = 2;
                tpg->twopixelsize[2] = 2;
                break;
        case V4L2_PIX_FMT_NV24:
        case V4L2_PIX_FMT_NV42:
                tpg->twopixelsize[0] = 2;
                tpg->twopixelsize[1] = 4;
                break;
        }
        return true;
}
EXPORT_SYMBOL_GPL(tpg_s_fourcc);

void tpg_s_crop_compose(struct tpg_data *tpg, const struct v4l2_rect *crop,
                const struct v4l2_rect *compose)
{
        tpg->crop = *crop;
        tpg->compose = *compose;
        tpg->scaled_width = (tpg->src_width * tpg->compose.width +
                                 tpg->crop.width - 1) / tpg->crop.width;
        tpg->scaled_width &= ~1;
        if (tpg->scaled_width > tpg->max_line_width)
                tpg->scaled_width = tpg->max_line_width;
        if (tpg->scaled_width < 2)
                tpg->scaled_width = 2;
        tpg->recalc_lines = true;
}
EXPORT_SYMBOL_GPL(tpg_s_crop_compose);

void tpg_reset_source(struct tpg_data *tpg, unsigned width, unsigned height,
                       u32 field)
{
        unsigned p;

        tpg->src_width = width;
        tpg->src_height = height;
        tpg->field = field;
        tpg->buf_height = height;
        if (V4L2_FIELD_HAS_T_OR_B(field))
                tpg->buf_height /= 2;
        tpg->scaled_width = width;
        tpg->crop.top = tpg->crop.left = 0;
        tpg->crop.width = width;
        tpg->crop.height = height;
        tpg->compose.top = tpg->compose.left = 0;
        tpg->compose.width = width;
        tpg->compose.height = tpg->buf_height;
        for (p = 0; p < tpg->planes; p++)
                tpg->bytesperline[p] = (width * tpg->twopixelsize[p]) /
                                       (2 * tpg->hdownsampling[p]);
        tpg->recalc_square_border = true;
}
EXPORT_SYMBOL_GPL(tpg_reset_source);

static enum tpg_color tpg_get_textbg_color(struct tpg_data *tpg)
{
        switch (tpg->pattern) {
        case TPG_PAT_BLACK:
                return TPG_COLOR_100_WHITE;
        case TPG_PAT_CSC_COLORBAR:
                return TPG_COLOR_CSC_BLACK;
        default:
                return TPG_COLOR_100_BLACK;
        }
}

static enum tpg_color tpg_get_textfg_color(struct tpg_data *tpg)
{
        switch (tpg->pattern) {
        case TPG_PAT_75_COLORBAR:
        case TPG_PAT_CSC_COLORBAR:
                return TPG_COLOR_CSC_WHITE;
        case TPG_PAT_BLACK:
                return TPG_COLOR_100_BLACK;
        default:
                return TPG_COLOR_100_WHITE;
        }
}

static inline int rec709_to_linear(int v)
{
        v = clamp(v, 0, 0xff0);
        return tpg_rec709_to_linear[v];
}

static inline int linear_to_rec709(int v)
{
        v = clamp(v, 0, 0xff0);
        return tpg_linear_to_rec709[v];
}

static void color_to_hsv(struct tpg_data *tpg, int r, int g, int b,
                           int *h, int *s, int *v)
{
        int max_rgb, min_rgb, diff_rgb;
        int aux;
        int third;
        int third_size;

        r >>= 4;
        g >>= 4;
        b >>= 4;

        /* Value */
        max_rgb = max3(r, g, b);
        *v = max_rgb;
        if (!max_rgb) {
                *h = 0;
                *s = 0;
                return;
        }

        /* Saturation */
        min_rgb = min3(r, g, b);
        diff_rgb = max_rgb - min_rgb;
        aux = 255 * diff_rgb;
        aux += max_rgb / 2;
        aux /= max_rgb;
        *s = aux;
        if (!aux) {
                *h = 0;
                return;
        }

        third_size = (tpg->real_hsv_enc == V4L2_HSV_ENC_180) ? 60 : 85;

        /* Hue */
        if (max_rgb == r) {
                aux =  g - b;
                third = 0;
        } else if (max_rgb == g) {
                aux =  b - r;
                third = third_size;
        } else {
                aux =  r - g;
                third = third_size * 2;
        }

        aux *= third_size / 2;
        aux += diff_rgb / 2;
        aux /= diff_rgb;
        aux += third;

        /* Clamp Hue */
        if (tpg->real_hsv_enc == V4L2_HSV_ENC_180) {
                if (aux < 0)
                        aux += 180;
                else if (aux > 180)
                        aux -= 180;
        } else {
                aux = aux & 0xff;
        }

        *h = aux;
}

static void rgb2ycbcr(const int m[3][3], int r, int g, int b,
                        int y_offset, int *y, int *cb, int *cr)
{
        *y  = ((m[0][0] * r + m[0][1] * g + m[0][2] * b) >> 16) + (y_offset << 4);
        *cb = ((m[1][0] * r + m[1][1] * g + m[1][2] * b) >> 16) + (128 << 4);
        *cr = ((m[2][0] * r + m[2][1] * g + m[2][2] * b) >> 16) + (128 << 4);
}

static void color_to_ycbcr(struct tpg_data *tpg, int r, int g, int b,
                           int *y, int *cb, int *cr)
{
#define COEFF(v, r) ((int)(0.5 + (v) * (r) * 256.0))

        static const int bt601[3][3] = {
                { COEFF(0.299, 219),   COEFF(0.587, 219),   COEFF(0.114, 219)   },
                { COEFF(-0.1687, 224), COEFF(-0.3313, 224), COEFF(0.5, 224)     },
                { COEFF(0.5, 224),     COEFF(-0.4187, 224), COEFF(-0.0813, 224) },
        };
        static const int bt601_full[3][3] = {
                { COEFF(0.299, 255),   COEFF(0.587, 255),   COEFF(0.114, 255)   },
                { COEFF(-0.1687, 255), COEFF(-0.3313, 255), COEFF(0.5, 255)     },
                { COEFF(0.5, 255),     COEFF(-0.4187, 255), COEFF(-0.0813, 255) },
        };
        static const int rec709[3][3] = {
                { COEFF(0.2126, 219),  COEFF(0.7152, 219),  COEFF(0.0722, 219)  },
                { COEFF(-0.1146, 224), COEFF(-0.3854, 224), COEFF(0.5, 224)     },
                { COEFF(0.5, 224),     COEFF(-0.4542, 224), COEFF(-0.0458, 224) },
        };
        static const int rec709_full[3][3] = {
                { COEFF(0.2126, 255),  COEFF(0.7152, 255),  COEFF(0.0722, 255)  },
                { COEFF(-0.1146, 255), COEFF(-0.3854, 255), COEFF(0.5, 255)     },
                { COEFF(0.5, 255),     COEFF(-0.4542, 255), COEFF(-0.0458, 255) },
        };
        static const int smpte240m[3][3] = {
                { COEFF(0.212, 219),  COEFF(0.701, 219),  COEFF(0.087, 219)  },
                { COEFF(-0.116, 224), COEFF(-0.384, 224), COEFF(0.5, 224)    },
                { COEFF(0.5, 224),    COEFF(-0.445, 224), COEFF(-0.055, 224) },
        };
        static const int smpte240m_full[3][3] = {
                { COEFF(0.212, 255),  COEFF(0.701, 255),  COEFF(0.087, 255)  },
                { COEFF(-0.116, 255), COEFF(-0.384, 255), COEFF(0.5, 255)    },
                { COEFF(0.5, 255),    COEFF(-0.445, 255), COEFF(-0.055, 255) },
        };
        static const int bt2020[3][3] = {
                { COEFF(0.2627, 219),  COEFF(0.6780, 219),  COEFF(0.0593, 219)  },
                { COEFF(-0.1396, 224), COEFF(-0.3604, 224), COEFF(0.5, 224)     },
                { COEFF(0.5, 224),     COEFF(-0.4598, 224), COEFF(-0.0402, 224) },
        };
        static const int bt2020_full[3][3] = {
                { COEFF(0.2627, 255),  COEFF(0.6780, 255),  COEFF(0.0593, 255)  },
                { COEFF(-0.1396, 255), COEFF(-0.3604, 255), COEFF(0.5, 255)     },
                { COEFF(0.5, 255),     COEFF(-0.4598, 255), COEFF(-0.0402, 255) },
        };
        static const int bt2020c[4] = {
                COEFF(1.0 / 1.9404, 224), COEFF(1.0 / 1.5816, 224),
                COEFF(1.0 / 1.7184, 224), COEFF(1.0 / 0.9936, 224),
        };
        static const int bt2020c_full[4] = {
                COEFF(1.0 / 1.9404, 255), COEFF(1.0 / 1.5816, 255),
                COEFF(1.0 / 1.7184, 255), COEFF(1.0 / 0.9936, 255),
        };

        bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
        unsigned y_offset = full ? 0 : 16;
        int lin_y, yc;

        switch (tpg->real_ycbcr_enc) {
        case V4L2_YCBCR_ENC_601:
                rgb2ycbcr(full ? bt601_full : bt601, r, g, b, y_offset, y, cb, cr);
                break;
        case V4L2_YCBCR_ENC_XV601:
                /* Ignore quantization range, there is only one possible
                 * Y'CbCr encoding. */
                rgb2ycbcr(bt601, r, g, b, 16, y, cb, cr);
                break;
        case V4L2_YCBCR_ENC_XV709:
                /* Ignore quantization range, there is only one possible
                 * Y'CbCr encoding. */
                rgb2ycbcr(rec709, r, g, b, 16, y, cb, cr);
                break;
        case V4L2_YCBCR_ENC_BT2020:
                rgb2ycbcr(full ? bt2020_full : bt2020, r, g, b, y_offset, y, cb, cr);
                break;
        case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
                lin_y = (COEFF(0.2627, 255) * rec709_to_linear(r) +
                         COEFF(0.6780, 255) * rec709_to_linear(g) +
                         COEFF(0.0593, 255) * rec709_to_linear(b)) >> 16;
                yc = linear_to_rec709(lin_y);
                *y = full ? yc : (yc * 219) / 255 + (16 << 4);
                if (b <= yc)
                        *cb = (((b - yc) * (full ? bt2020c_full[0] : bt2020c[0])) >> 16) + (128 << 4);
                else
                        *cb = (((b - yc) * (full ? bt2020c_full[1] : bt2020c[1])) >> 16) + (128 << 4);
                if (r <= yc)
                        *cr = (((r - yc) * (full ? bt2020c_full[2] : bt2020c[2])) >> 16) + (128 << 4);
                else
                        *cr = (((r - yc) * (full ? bt2020c_full[3] : bt2020c[3])) >> 16) + (128 << 4);
                break;
        case V4L2_YCBCR_ENC_SMPTE240M:
                rgb2ycbcr(full ? smpte240m_full : smpte240m, r, g, b, y_offset, y, cb, cr);
                break;
        case V4L2_YCBCR_ENC_709:
        default:
                rgb2ycbcr(full ? rec709_full : rec709, r, g, b, y_offset, y, cb, cr);
                break;
        }
}

static void ycbcr2rgb(const int m[3][3], int y, int cb, int cr,
                        int y_offset, int *r, int *g, int *b)
{
        y -= y_offset << 4;
        cb -= 128 << 4;
        cr -= 128 << 4;
        *r = m[0][0] * y + m[0][1] * cb + m[0][2] * cr;
        *g = m[1][0] * y + m[1][1] * cb + m[1][2] * cr;
        *b = m[2][0] * y + m[2][1] * cb + m[2][2] * cr;
        *r = clamp(*r >> 12, 0, 0xff0);
        *g = clamp(*g >> 12, 0, 0xff0);
        *b = clamp(*b >> 12, 0, 0xff0);
}

static void ycbcr_to_color(struct tpg_data *tpg, int y, int cb, int cr,
                           int *r, int *g, int *b)
{
#undef COEFF
#define COEFF(v, r) ((int)(0.5 + (v) * ((255.0 * 255.0 * 16.0) / (r))))
        static const int bt601[3][3] = {
                { COEFF(1, 219), COEFF(0, 224),       COEFF(1.4020, 224)  },
                { COEFF(1, 219), COEFF(-0.3441, 224), COEFF(-0.7141, 224) },
                { COEFF(1, 219), COEFF(1.7720, 224),  COEFF(0, 224)       },
        };
        static const int bt601_full[3][3] = {
                { COEFF(1, 255), COEFF(0, 255),       COEFF(1.4020, 255)  },
                { COEFF(1, 255), COEFF(-0.3441, 255), COEFF(-0.7141, 255) },
                { COEFF(1, 255), COEFF(1.7720, 255),  COEFF(0, 255)       },
        };
        static const int rec709[3][3] = {
                { COEFF(1, 219), COEFF(0, 224),       COEFF(1.5748, 224)  },
                { COEFF(1, 219), COEFF(-0.1873, 224), COEFF(-0.4681, 224) },
                { COEFF(1, 219), COEFF(1.8556, 224),  COEFF(0, 224)       },
        };
        static const int rec709_full[3][3] = {
                { COEFF(1, 255), COEFF(0, 255),       COEFF(1.5748, 255)  },
                { COEFF(1, 255), COEFF(-0.1873, 255), COEFF(-0.4681, 255) },
                { COEFF(1, 255), COEFF(1.8556, 255),  COEFF(0, 255)       },
        };
        static const int smpte240m[3][3] = {
                { COEFF(1, 219), COEFF(0, 224),       COEFF(1.5756, 224)  },
                { COEFF(1, 219), COEFF(-0.2253, 224), COEFF(-0.4767, 224) },
                { COEFF(1, 219), COEFF(1.8270, 224),  COEFF(0, 224)       },
        };
        static const int smpte240m_full[3][3] = {
                { COEFF(1, 255), COEFF(0, 255),       COEFF(1.5756, 255)  },
                { COEFF(1, 255), COEFF(-0.2253, 255), COEFF(-0.4767, 255) },
                { COEFF(1, 255), COEFF(1.8270, 255),  COEFF(0, 255)       },
        };
        static const int bt2020[3][3] = {
                { COEFF(1, 219), COEFF(0, 224),       COEFF(1.4746, 224)  },
                { COEFF(1, 219), COEFF(-0.1646, 224), COEFF(-0.5714, 224) },
                { COEFF(1, 219), COEFF(1.8814, 224),  COEFF(0, 224)       },
        };
        static const int bt2020_full[3][3] = {
                { COEFF(1, 255), COEFF(0, 255),       COEFF(1.4746, 255)  },
                { COEFF(1, 255), COEFF(-0.1646, 255), COEFF(-0.5714, 255) },
                { COEFF(1, 255), COEFF(1.8814, 255),  COEFF(0, 255)       },
        };
        static const int bt2020c[4] = {
                COEFF(1.9404, 224), COEFF(1.5816, 224),
                COEFF(1.7184, 224), COEFF(0.9936, 224),
        };
        static const int bt2020c_full[4] = {
                COEFF(1.9404, 255), COEFF(1.5816, 255),
                COEFF(1.7184, 255), COEFF(0.9936, 255),
        };

        bool full = tpg->real_quantization == V4L2_QUANTIZATION_FULL_RANGE;
        unsigned y_offset = full ? 0 : 16;
        int y_fac = full ? COEFF(1.0, 255) : COEFF(1.0, 219);
        int lin_r, lin_g, lin_b, lin_y;

        switch (tpg->real_ycbcr_enc) {
        case V4L2_YCBCR_ENC_601:
                ycbcr2rgb(full ? bt601_full : bt601, y, cb, cr, y_offset, r, g, b);
                break;
        case V4L2_YCBCR_ENC_XV601:
                /* Ignore quantization range, there is only one possible
                 * Y'CbCr encoding. */
                ycbcr2rgb(bt601, y, cb, cr, 16, r, g, b);
                break;
        case V4L2_YCBCR_ENC_XV709:
                /* Ignore quantization range, there is only one possible
                 * Y'CbCr encoding. */
                ycbcr2rgb(rec709, y, cb, cr, 16, r, g, b);
                break;
        case V4L2_YCBCR_ENC_BT2020:
                ycbcr2rgb(full ? bt2020_full : bt2020, y, cb, cr, y_offset, r, g, b);
                break;
        case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
                y -= full ? 0 : 16 << 4;
                cb -= 128 << 4;
                cr -= 128 << 4;

                if (cb <= 0)
                        *b = y_fac * y + (full ? bt2020c_full[0] : bt2020c[0]) * cb;
                else
                        *b = y_fac * y + (full ? bt2020c_full[1] : bt2020c[1]) * cb;
                *b = *b >> 12;
                if (cr <= 0)
                        *r = y_fac * y + (full ? bt2020c_full[2] : bt2020c[2]) * cr;
                else
                        *r = y_fac * y + (full ? bt2020c_full[3] : bt2020c[3]) * cr;
                *r = *r >> 12;
                lin_r = rec709_to_linear(*r);
                lin_b = rec709_to_linear(*b);
                lin_y = rec709_to_linear((y * 255) / (full ? 255 : 219));

                lin_g = COEFF(1.0 / 0.6780, 255) * lin_y -
                        COEFF(0.2627 / 0.6780, 255) * lin_r -
                        COEFF(0.0593 / 0.6780, 255) * lin_b;
                *g = linear_to_rec709(lin_g >> 12);
                break;
        case V4L2_YCBCR_ENC_SMPTE240M:
                ycbcr2rgb(full ? smpte240m_full : smpte240m, y, cb, cr, y_offset, r, g, b);
                break;
        case V4L2_YCBCR_ENC_709:
        default:
                ycbcr2rgb(full ? rec709_full : rec709, y, cb, cr, y_offset, r, g, b);
                break;
        }
}

/* precalculate color bar values to speed up rendering */
static void precalculate_color(struct tpg_data *tpg, int k)
{
        int col = k;
        int r = tpg_colors[col].r;
        int g = tpg_colors[col].g;
        int b = tpg_colors[col].b;
        int y, cb, cr;
        bool ycbcr_valid = false;

        if (k == TPG_COLOR_TEXTBG) {
                col = tpg_get_textbg_color(tpg);

                r = tpg_colors[col].r;
                g = tpg_colors[col].g;
                b = tpg_colors[col].b;
        } else if (k == TPG_COLOR_TEXTFG) {
                col = tpg_get_textfg_color(tpg);

                r = tpg_colors[col].r;
                g = tpg_colors[col].g;
                b = tpg_colors[col].b;
        } else if (tpg->pattern == TPG_PAT_NOISE) {
                r = g = b = get_random_u8();
        } else if (k == TPG_COLOR_RANDOM) {
                r = g = b = tpg->qual_offset + get_random_u32_below(196);
        } else if (k >= TPG_COLOR_RAMP) {
                r = g = b = k - TPG_COLOR_RAMP;
        }

        if (tpg->pattern == TPG_PAT_CSC_COLORBAR && col <= TPG_COLOR_CSC_BLACK) {
                r = tpg_csc_colors[tpg->colorspace][tpg->real_xfer_func][col].r;
                g = tpg_csc_colors[tpg->colorspace][tpg->real_xfer_func][col].g;
                b = tpg_csc_colors[tpg->colorspace][tpg->real_xfer_func][col].b;
        } else {
                r <<= 4;
                g <<= 4;
                b <<= 4;
        }

        if (tpg->qual == TPG_QUAL_GRAY ||
            tpg->color_enc ==  TGP_COLOR_ENC_LUMA) {
                /* Rec. 709 Luma function */
                /* (0.2126, 0.7152, 0.0722) * (255 * 256) */
                r = g = b = (13879 * r + 46688 * g + 4713 * b) >> 16;
        }

        /*
         * The assumption is that the RGB output is always full range,
         * so only if the rgb_range overrides the 'real' rgb range do
         * we need to convert the RGB values.
         *
         * Remember that r, g and b are still in the 0 - 0xff0 range.
         */
        if (tpg->real_rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
            tpg->rgb_range == V4L2_DV_RGB_RANGE_FULL &&
            tpg->color_enc == TGP_COLOR_ENC_RGB) {
                /*
                 * Convert from full range (which is what r, g and b are)
                 * to limited range (which is the 'real' RGB range), which
                 * is then interpreted as full range.
                 */
                r = (r * 219) / 255 + (16 << 4);
                g = (g * 219) / 255 + (16 << 4);
                b = (b * 219) / 255 + (16 << 4);
        } else if (tpg->real_rgb_range != V4L2_DV_RGB_RANGE_LIMITED &&
                   tpg->rgb_range == V4L2_DV_RGB_RANGE_LIMITED &&
                   tpg->color_enc == TGP_COLOR_ENC_RGB) {

                /*
                 * Clamp r, g and b to the limited range and convert to full
                 * range since that's what we deliver.
                 */
                r = clamp(r, 16 << 4, 235 << 4);
                g = clamp(g, 16 << 4, 235 << 4);
                b = clamp(b, 16 << 4, 235 << 4);
                r = (r - (16 << 4)) * 255 / 219;
                g = (g - (16 << 4)) * 255 / 219;
                b = (b - (16 << 4)) * 255 / 219;
        }

        if ((tpg->brightness != 128 || tpg->contrast != 128 ||
             tpg->saturation != 128 || tpg->hue) &&
            tpg->color_enc != TGP_COLOR_ENC_LUMA) {
                /* Implement these operations */
                int tmp_cb, tmp_cr;

                /* First convert to YCbCr */

                color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);

                y = (16 << 4) + ((y - (16 << 4)) * tpg->contrast) / 128;
                y += (tpg->brightness << 4) - (128 << 4);

                cb -= 128 << 4;
                cr -= 128 << 4;
                tmp_cb = (cb * cos(128 + tpg->hue)) / 127 + (cr * sin[128 + tpg->hue]) / 127;
                tmp_cr = (cr * cos(128 + tpg->hue)) / 127 - (cb * sin[128 + tpg->hue]) / 127;

                cb = (128 << 4) + (tmp_cb * tpg->contrast * tpg->saturation) / (128 * 128);
                cr = (128 << 4) + (tmp_cr * tpg->contrast * tpg->saturation) / (128 * 128);
                if (tpg->color_enc == TGP_COLOR_ENC_YCBCR)
                        ycbcr_valid = true;
                else
                        ycbcr_to_color(tpg, y, cb, cr, &r, &g, &b);
        } else if ((tpg->brightness != 128 || tpg->contrast != 128) &&
                   tpg->color_enc == TGP_COLOR_ENC_LUMA) {
                r = (16 << 4) + ((r - (16 << 4)) * tpg->contrast) / 128;
                r += (tpg->brightness << 4) - (128 << 4);
        }

        switch (tpg->color_enc) {
        case TGP_COLOR_ENC_HSV:
        {
                int h, s, v;

                color_to_hsv(tpg, r, g, b, &h, &s, &v);
                tpg->colors[k][0] = h;
                tpg->colors[k][1] = s;
                tpg->colors[k][2] = v;
                break;
        }
        case TGP_COLOR_ENC_YCBCR:
        {
                /* Convert to YCbCr */
                if (!ycbcr_valid)
                        color_to_ycbcr(tpg, r, g, b, &y, &cb, &cr);

                y >>= 4;
                cb >>= 4;
                cr >>= 4;
                /*
                 * XV601/709 use the header/footer margins to encode R', G'
                 * and B' values outside the range [0-1]. So do not clamp
                 * XV601/709 values.
                 */
                if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE &&
                    tpg->real_ycbcr_enc != V4L2_YCBCR_ENC_XV601 &&
                    tpg->real_ycbcr_enc != V4L2_YCBCR_ENC_XV709) {
                        y = clamp(y, 16, 235);
                        cb = clamp(cb, 16, 240);
                        cr = clamp(cr, 16, 240);
                } else {
                        y = clamp(y, 1, 254);
                        cb = clamp(cb, 1, 254);
                        cr = clamp(cr, 1, 254);
                }
                switch (tpg->fourcc) {
                case V4L2_PIX_FMT_YUV444:
                        y >>= 4;
                        cb >>= 4;
                        cr >>= 4;
                        break;
                case V4L2_PIX_FMT_YUV555:
                        y >>= 3;
                        cb >>= 3;
                        cr >>= 3;
                        break;
                case V4L2_PIX_FMT_YUV565:
                        y >>= 3;
                        cb >>= 2;
                        cr >>= 3;
                        break;
                }
                tpg->colors[k][0] = y;
                tpg->colors[k][1] = cb;
                tpg->colors[k][2] = cr;
                break;
        }
        case TGP_COLOR_ENC_LUMA:
        {
                tpg->colors[k][0] = r >> 4;
                break;
        }
        case TGP_COLOR_ENC_RGB:
        {
                if (tpg->real_quantization == V4L2_QUANTIZATION_LIM_RANGE) {
                        r = (r * 219) / 255 + (16 << 4);
                        g = (g * 219) / 255 + (16 << 4);
                        b = (b * 219) / 255 + (16 << 4);
                }
                switch (tpg->fourcc) {
                case V4L2_PIX_FMT_RGB332:
                        r >>= 9;
                        g >>= 9;
                        b >>= 10;
                        break;
                case V4L2_PIX_FMT_RGB565:
                case V4L2_PIX_FMT_RGB565X:
                        r >>= 7;
                        g >>= 6;
                        b >>= 7;
                        break;
                case V4L2_PIX_FMT_RGB444:
                case V4L2_PIX_FMT_XRGB444:
                case V4L2_PIX_FMT_ARGB444:
                case V4L2_PIX_FMT_RGBX444:
                case V4L2_PIX_FMT_RGBA444:
                case V4L2_PIX_FMT_XBGR444:
                case V4L2_PIX_FMT_ABGR444:
                case V4L2_PIX_FMT_BGRX444:
                case V4L2_PIX_FMT_BGRA444:
                        r >>= 8;
                        g >>= 8;
                        b >>= 8;
                        break;
                case V4L2_PIX_FMT_RGB555:
                case V4L2_PIX_FMT_XRGB555:
                case V4L2_PIX_FMT_ARGB555:
                case V4L2_PIX_FMT_RGBX555:
                case V4L2_PIX_FMT_RGBA555:
                case V4L2_PIX_FMT_XBGR555:
                case V4L2_PIX_FMT_ABGR555:
                case V4L2_PIX_FMT_BGRX555:
                case V4L2_PIX_FMT_BGRA555:
                case V4L2_PIX_FMT_RGB555X:
                case V4L2_PIX_FMT_XRGB555X:
                case V4L2_PIX_FMT_ARGB555X:
                        r >>= 7;
                        g >>= 7;
                        b >>= 7;
                        break;
                case V4L2_PIX_FMT_BGR666:
                        r >>= 6;
                        g >>= 6;
                        b >>= 6;
                        break;
                default:
                        r >>= 4;
                        g >>= 4;
                        b >>= 4;
                        break;
                }

                tpg->colors[k][0] = r;
                tpg->colors[k][1] = g;
                tpg->colors[k][2] = b;
                break;
        }
        }
}

static void tpg_precalculate_colors(struct tpg_data *tpg)
{
        int k;

        for (k = 0; k < TPG_COLOR_MAX; k++)
                precalculate_color(tpg, k);
}

/* 'odd' is true for pixels 1, 3, 5, etc. and false for pixels 0, 2, 4, etc. */
static void gen_twopix(struct tpg_data *tpg,
                u8 buf[TPG_MAX_PLANES][8], int color, bool odd)
{
        unsigned offset = odd * tpg->twopixelsize[0] / 2;
        u8 alpha = tpg->alpha_component;
        u8 r_y_h, g_u_s, b_v;

        if (tpg->alpha_red_only && color != TPG_COLOR_CSC_RED &&
                                   color != TPG_COLOR_100_RED &&
                                   color != TPG_COLOR_75_RED)
                alpha = 0;
        if (color == TPG_COLOR_RANDOM)
                precalculate_color(tpg, color);
        r_y_h = tpg->colors[color][0]; /* R or precalculated Y, H */
        g_u_s = tpg->colors[color][1]; /* G or precalculated U, V */
        b_v = tpg->colors[color][2]; /* B or precalculated V */

        switch (tpg->fourcc) {
        case V4L2_PIX_FMT_GREY:
                buf[0][offset] = r_y_h;
                break;
        case V4L2_PIX_FMT_Y10:
                buf[0][offset] = (r_y_h << 2) & 0xff;
                buf[0][offset+1] = r_y_h >> 6;
                break;
        case V4L2_PIX_FMT_Y12:
                buf[0][offset] = (r_y_h << 4) & 0xff;
                buf[0][offset+1] = r_y_h >> 4;
                break;
        case V4L2_PIX_FMT_Y16:
        case V4L2_PIX_FMT_Z16:
                /*
                 * Ideally both bytes should be set to r_y_h, but then you won't
                 * be able to detect endian problems. So keep it 0 except for
                 * the corner case where r_y_h is 0xff so white really will be
                 * white (0xffff).
                 */
                buf[0][offset] = r_y_h == 0xff ? r_y_h : 0;
                buf[0][offset+1] = r_y_h;
                break;
        case V4L2_PIX_FMT_Y16_BE:
                /* See comment for V4L2_PIX_FMT_Y16 above */
                buf[0][offset] = r_y_h;
                buf[0][offset+1] = r_y_h == 0xff ? r_y_h : 0;
                break;
        case V4L2_PIX_FMT_YUV422M:
        case V4L2_PIX_FMT_YUV422P:
        case V4L2_PIX_FMT_YUV420:
        case V4L2_PIX_FMT_YUV420M:
                buf[0][offset] = r_y_h;
                if (odd) {
                        buf[1][0] = (buf[1][0] + g_u_s) / 2;
                        buf[2][0] = (buf[2][0] + b_v) / 2;
                        buf[1][1] = buf[1][0];
                        buf[2][1] = buf[2][0];
                        break;
                }
                buf[1][0] = g_u_s;
                buf[2][0] = b_v;
                break;
        case V4L2_PIX_FMT_YVU422M:
        case V4L2_PIX_FMT_YVU420:
        case V4L2_PIX_FMT_YVU420M:
                buf[0][offset] = r_y_h;
                if (odd) {
                        buf[1][0] = (buf[1][0] + b_v) / 2;
                        buf[2][0] = (buf[2][0] + g_u_s) / 2;
                        buf[1][1] = buf[1][0];
                        buf[2][1] = buf[2][0];
                        break;
                }
                buf[1][0] = b_v;
                buf[2][0] = g_u_s;
                break;

        case V4L2_PIX_FMT_NV12:
        case V4L2_PIX_FMT_NV12M:
        case V4L2_PIX_FMT_NV16:
        case V4L2_PIX_FMT_NV16M:
                buf[0][offset] = r_y_h;
                if (odd) {
                        buf[1][0] = (buf[1][0] + g_u_s) / 2;
                        buf[1][1] = (buf[1][1] + b_v) / 2;
                        break;
                }
                buf[1][0] = g_u_s;
                buf[1][1] = b_v;
                break;
        case V4L2_PIX_FMT_NV21:
        case V4L2_PIX_FMT_NV21M:
        case V4L2_PIX_FMT_NV61:
        case V4L2_PIX_FMT_NV61M:
                buf[0][offset] = r_y_h;
                if (odd) {
                        buf[1][0] = (buf[1][0] + b_v) / 2;
                        buf[1][1] = (buf[1][1] + g_u_s) / 2;
                        break;
                }
                buf[1][0] = b_v;
                buf[1][1] = g_u_s;
                break;

        case V4L2_PIX_FMT_YUV444M:
                buf[0][offset] = r_y_h;
                buf[1][offset] = g_u_s;
                buf[2][offset] = b_v;
                break;

        case V4L2_PIX_FMT_YVU444M:
                buf[0][offset] = r_y_h;
                buf[1][offset] = b_v;
                buf[2][offset] = g_u_s;
                break;

        case V4L2_PIX_FMT_NV24:
                buf[0][offset] = r_y_h;
                buf[1][2 * offset] = g_u_s;
                buf[1][(2 * offset + 1) % 8] = b_v;
                break;

        case V4L2_PIX_FMT_NV42:
                buf[0][offset] = r_y_h;
                buf[1][2 * offset] = b_v;
                buf[1][(2 * offset + 1) % 8] = g_u_s;
                break;

        case V4L2_PIX_FMT_YUYV:
                buf[0][offset] = r_y_h;
                if (odd) {
                        buf[0][1] = (buf[0][1] + g_u_s) / 2;
                        buf[0][3] = (buf[0][3] + b_v) / 2;
                        break;
                }
                buf[0][1] = g_u_s;
                buf[0][3] = b_v;
                break;
        case V4L2_PIX_FMT_UYVY:
                buf[0][offset + 1] = r_y_h;
                if (odd) {
                        buf[0][0] = (buf[0][0] + g_u_s) / 2;
                        buf[0][2] = (buf[0][2] + b_v) / 2;
                        break;
                }
                buf[0][0] = g_u_s;
                buf[0][2] = b_v;
                break;
        case V4L2_PIX_FMT_YVYU:
                buf[0][offset] = r_y_h;
                if (odd) {
                        buf[0][1] = (buf[0][1] + b_v) / 2;
                        buf[0][3] = (buf[0][3] + g_u_s) / 2;
                        break;
                }
                buf[0][1] = b_v;
                buf[0][3] = g_u_s;
                break;
        case V4L2_PIX_FMT_VYUY:
                buf[0][offset + 1] = r_y_h;
                if (odd) {
                        buf[0][0] = (buf[0][0] + b_v) / 2;
                        buf[0][2] = (buf[0][2] + g_u_s) / 2;
                        break;
                }
                buf[0][0] = b_v;
                buf[0][2] = g_u_s;
                break;
        case V4L2_PIX_FMT_RGB332:
                buf[0][offset] = (r_y_h << 5) | (g_u_s << 2) | b_v;
                break;
        case V4L2_PIX_FMT_YUV565:
        case V4L2_PIX_FMT_RGB565:
                buf[0][offset] = (g_u_s << 5) | b_v;
                buf[0][offset + 1] = (r_y_h << 3) | (g_u_s >> 3);
                break;
        case V4L2_PIX_FMT_RGB565X:
                buf[0][offset] = (r_y_h << 3) | (g_u_s >> 3);
                buf[0][offset + 1] = (g_u_s << 5) | b_v;
                break;
        case V4L2_PIX_FMT_RGB444:
        case V4L2_PIX_FMT_XRGB444:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_YUV444:
        case V4L2_PIX_FMT_ARGB444:
                buf[0][offset] = (g_u_s << 4) | b_v;
                buf[0][offset + 1] = (alpha & 0xf0) | r_y_h;
                break;
        case V4L2_PIX_FMT_RGBX444:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_RGBA444:
                buf[0][offset] = (b_v << 4) | (alpha >> 4);
                buf[0][offset + 1] = (r_y_h << 4) | g_u_s;
                break;
        case V4L2_PIX_FMT_XBGR444:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_ABGR444:
                buf[0][offset] = (g_u_s << 4) | r_y_h;
                buf[0][offset + 1] = (alpha & 0xf0) | b_v;
                break;
        case V4L2_PIX_FMT_BGRX444:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_BGRA444:
                buf[0][offset] = (r_y_h << 4) | (alpha >> 4);
                buf[0][offset + 1] = (b_v << 4) | g_u_s;
                break;
        case V4L2_PIX_FMT_RGB555:
        case V4L2_PIX_FMT_XRGB555:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_YUV555:
        case V4L2_PIX_FMT_ARGB555:
                buf[0][offset] = (g_u_s << 5) | b_v;
                buf[0][offset + 1] = (alpha & 0x80) | (r_y_h << 2)
                                                    | (g_u_s >> 3);
                break;
        case V4L2_PIX_FMT_RGBX555:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_RGBA555:
                buf[0][offset] = (g_u_s << 6) | (b_v << 1) |
                                 ((alpha & 0x80) >> 7);
                buf[0][offset + 1] = (r_y_h << 3) | (g_u_s >> 2);
                break;
        case V4L2_PIX_FMT_XBGR555:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_ABGR555:
                buf[0][offset] = (g_u_s << 5) | r_y_h;
                buf[0][offset + 1] = (alpha & 0x80) | (b_v << 2)
                                                    | (g_u_s >> 3);
                break;
        case V4L2_PIX_FMT_BGRX555:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_BGRA555:
                buf[0][offset] = (g_u_s << 6) | (r_y_h << 1) |
                                 ((alpha & 0x80) >> 7);
                buf[0][offset + 1] = (b_v << 3) | (g_u_s >> 2);
                break;
        case V4L2_PIX_FMT_RGB555X:
        case V4L2_PIX_FMT_XRGB555X:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_ARGB555X:
                buf[0][offset] = (alpha & 0x80) | (r_y_h << 2) | (g_u_s >> 3);
                buf[0][offset + 1] = (g_u_s << 5) | b_v;
                break;
        case V4L2_PIX_FMT_RGB24:
        case V4L2_PIX_FMT_HSV24:
                buf[0][offset] = r_y_h;
                buf[0][offset + 1] = g_u_s;
                buf[0][offset + 2] = b_v;
                break;
        case V4L2_PIX_FMT_BGR24:
                buf[0][offset] = b_v;
                buf[0][offset + 1] = g_u_s;
                buf[0][offset + 2] = r_y_h;
                break;
        case V4L2_PIX_FMT_BGR666:
                buf[0][offset] = (b_v << 2) | (g_u_s >> 4);
                buf[0][offset + 1] = (g_u_s << 4) | (r_y_h >> 2);
                buf[0][offset + 2] = r_y_h << 6;
                buf[0][offset + 3] = 0;
                break;
        case V4L2_PIX_FMT_RGB32:
        case V4L2_PIX_FMT_XRGB32:
        case V4L2_PIX_FMT_HSV32:
        case V4L2_PIX_FMT_XYUV32:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_YUV32:
        case V4L2_PIX_FMT_ARGB32:
        case V4L2_PIX_FMT_AYUV32:
                buf[0][offset] = alpha;
                buf[0][offset + 1] = r_y_h;
                buf[0][offset + 2] = g_u_s;
                buf[0][offset + 3] = b_v;
                break;
        case V4L2_PIX_FMT_RGBX32:
        case V4L2_PIX_FMT_YUVX32:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_RGBA32:
        case V4L2_PIX_FMT_YUVA32:
                buf[0][offset] = r_y_h;
                buf[0][offset + 1] = g_u_s;
                buf[0][offset + 2] = b_v;
                buf[0][offset + 3] = alpha;
                break;
        case V4L2_PIX_FMT_BGR32:
        case V4L2_PIX_FMT_XBGR32:
        case V4L2_PIX_FMT_VUYX32:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_ABGR32:
        case V4L2_PIX_FMT_VUYA32:
                buf[0][offset] = b_v;
                buf[0][offset + 1] = g_u_s;
                buf[0][offset + 2] = r_y_h;
                buf[0][offset + 3] = alpha;
                break;
        case V4L2_PIX_FMT_BGRX32:
                alpha = 0;
                fallthrough;
        case V4L2_PIX_FMT_BGRA32:
                buf[0][offset] = alpha;
                buf[0][offset + 1] = b_v;
                buf[0][offset + 2] = g_u_s;
                buf[0][offset + 3] = r_y_h;
                break;
        case V4L2_PIX_FMT_SBGGR8:
                buf[0][offset] = odd ? g_u_s : b_v;
                buf[1][offset] = odd ? r_y_h : g_u_s;
                break;
        case V4L2_PIX_FMT_SGBRG8:
                buf[0][offset] = odd ? b_v : g_u_s;
                buf[1][offset] = odd ? g_u_s : r_y_h;
                break;
        case V4L2_PIX_FMT_SGRBG8:
                buf[0][offset] = odd ? r_y_h : g_u_s;
                buf[1][offset] = odd ? g_u_s : b_v;
                break;
        case V4L2_PIX_FMT_SRGGB8:
                buf[0][offset] = odd ? g_u_s : r_y_h;
                buf[1][offset] = odd ? b_v : g_u_s;
                break;
        case V4L2_PIX_FMT_SBGGR10:
                buf[0][offset] = odd ? g_u_s << 2 : b_v << 2;
                buf[0][offset + 1] = odd ? g_u_s >> 6 : b_v >> 6;
                buf[1][offset] = odd ? r_y_h << 2 : g_u_s << 2;
                buf[1][offset + 1] = odd ? r_y_h >> 6 : g_u_s >> 6;
                buf[0][offset] |= (buf[0][offset] >> 2) & 3;
                buf[1][offset] |= (buf[1][offset] >> 2) & 3;
                break;
        case V4L2_PIX_FMT_SGBRG10:
                buf[0][offset] = odd ? b_v << 2 : g_u_s << 2;
                buf[0][offset + 1] = odd ? b_v >> 6 : g_u_s >> 6;
                buf[1][offset] = odd ? g_u_s << 2 : r_y_h << 2;
                buf[1][offset + 1] = odd ? g_u_s >> 6 : r_y_h >> 6;
                buf[0][offset] |= (buf[0][offset] >> 2) & 3;
                buf[1][offset] |= (buf[1][offset] >> 2) & 3;
                break;
        case V4L2_PIX_FMT_SGRBG10:
                buf[0][offset] = odd ? r_y_h << 2 : g_u_s << 2;
                buf[0][offset + 1] = odd ? r_y_h >> 6 : g_u_s >> 6;
                buf[1][offset] = odd ? g_u_s << 2 : b_v << 2;
                buf[1][offset + 1] = odd ? g_u_s >> 6 : b_v >> 6;
                buf[0][offset] |= (buf[0][offset] >> 2) & 3;
                buf[1][offset] |= (buf[1][offset] >> 2) & 3;
                break;
        case V4L2_PIX_FMT_SRGGB10:
                buf[0][offset] = odd ? g_u_s << 2 : r_y_h << 2;
                buf[0][offset + 1] = odd ? g_u_s >> 6 : r_y_h >> 6;
                buf[1][offset] = odd ? b_v << 2 : g_u_s << 2;
                buf[1][offset + 1] = odd ? b_v >> 6 : g_u_s >> 6;
                buf[0][offset] |= (buf[0][offset] >> 2) & 3;
                buf[1][offset] |= (buf[1][offset] >> 2) & 3;
                break;
        case V4L2_PIX_FMT_SBGGR12:
                buf[0][offset] = odd ? g_u_s << 4 : b_v << 4;
                buf[0][offset + 1] = odd ? g_u_s >> 4 : b_v >> 4;
                buf[1][offset] = odd ? r_y_h << 4 : g_u_s << 4;
                buf[1][offset + 1] = odd ? r_y_h >> 4 : g_u_s >> 4;
                buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
                buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
                break;
        case V4L2_PIX_FMT_SGBRG12:
                buf[0][offset] = odd ? b_v << 4 : g_u_s << 4;
                buf[0][offset + 1] = odd ? b_v >> 4 : g_u_s >> 4;
                buf[1][offset] = odd ? g_u_s << 4 : r_y_h << 4;
                buf[1][offset + 1] = odd ? g_u_s >> 4 : r_y_h >> 4;
                buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
                buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
                break;
        case V4L2_PIX_FMT_SGRBG12:
                buf[0][offset] = odd ? r_y_h << 4 : g_u_s << 4;
                buf[0][offset + 1] = odd ? r_y_h >> 4 : g_u_s >> 4;
                buf[1][offset] = odd ? g_u_s << 4 : b_v << 4;
                buf[1][offset + 1] = odd ? g_u_s >> 4 : b_v >> 4;
                buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
                buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
                break;
        case V4L2_PIX_FMT_SRGGB12:
                buf[0][offset] = odd ? g_u_s << 4 : r_y_h << 4;
                buf[0][offset + 1] = odd ? g_u_s >> 4 : r_y_h >> 4;
                buf[1][offset] = odd ? b_v << 4 : g_u_s << 4;
                buf[1][offset + 1] = odd ? b_v >> 4 : g_u_s >> 4;
                buf[0][offset] |= (buf[0][offset] >> 4) & 0xf;
                buf[1][offset] |= (buf[1][offset] >> 4) & 0xf;
                break;
        case V4L2_PIX_FMT_SBGGR16:
                buf[0][offset] = buf[0][offset + 1] = odd ? g_u_s : b_v;
                buf[1][offset] = buf[1][offset + 1] = odd ? r_y_h : g_u_s;
                break;
        case V4L2_PIX_FMT_SGBRG16:
                buf[0][offset] = buf[0][offset + 1] = odd ? b_v : g_u_s;
                buf[1][offset] = buf[1][offset + 1] = odd ? g_u_s : r_y_h;
                break;
        case V4L2_PIX_FMT_SGRBG16:
                buf[0][offset] = buf[0][offset + 1] = odd ? r_y_h : g_u_s;
                buf[1][offset] = buf[1][offset + 1] = odd ? g_u_s : b_v;
                break;
        case V4L2_PIX_FMT_SRGGB16:
                buf[0][offset] = buf[0][offset + 1] = odd ? g_u_s : r_y_h;
                buf[1][offset] = buf[1][offset + 1] = odd ? b_v : g_u_s;
                break;
        }
}

unsigned tpg_g_interleaved_plane(const struct tpg_data *tpg, unsigned buf_line)
{
        switch (tpg->fourcc) {
        case V4L2_PIX_FMT_SBGGR8:
        case V4L2_PIX_FMT_SGBRG8:
        case V4L2_PIX_FMT_SGRBG8:
        case V4L2_PIX_FMT_SRGGB8:
        case V4L2_PIX_FMT_SBGGR10:
        case V4L2_PIX_FMT_SGBRG10:
        case V4L2_PIX_FMT_SGRBG10:
        case V4L2_PIX_FMT_SRGGB10:
        case V4L2_PIX_FMT_SBGGR12:
        case V4L2_PIX_FMT_SGBRG12:
        case V4L2_PIX_FMT_SGRBG12:
        case V4L2_PIX_FMT_SRGGB12:
        case V4L2_PIX_FMT_SBGGR16:
        case V4L2_PIX_FMT_SGBRG16:
        case V4L2_PIX_FMT_SGRBG16:
        case V4L2_PIX_FMT_SRGGB16:
                return buf_line & 1;
        default:
                return 0;
        }
}
EXPORT_SYMBOL_GPL(tpg_g_interleaved_plane);

/* Return how many pattern lines are used by the current pattern. */
static unsigned tpg_get_pat_lines(const struct tpg_data *tpg)
{
        switch (tpg->pattern) {
        case TPG_PAT_CHECKERS_16X16:
        case TPG_PAT_CHECKERS_2X2:
        case TPG_PAT_CHECKERS_1X1:
        case TPG_PAT_COLOR_CHECKERS_2X2:
        case TPG_PAT_COLOR_CHECKERS_1X1:
        case TPG_PAT_ALTERNATING_HLINES:
        case TPG_PAT_CROSS_1_PIXEL:
        case TPG_PAT_CROSS_2_PIXELS:
        case TPG_PAT_CROSS_10_PIXELS:
                return 2;
        case TPG_PAT_100_COLORSQUARES:
        case TPG_PAT_100_HCOLORBAR:
                return 8;
        default:
                return 1;
        }
}

/* Which pattern line should be used for the given frame line. */
static unsigned tpg_get_pat_line(const struct tpg_data *tpg, unsigned line)
{
        switch (tpg->pattern) {
        case TPG_PAT_CHECKERS_16X16:
                return (line >> 4) & 1;
        case TPG_PAT_CHECKERS_1X1:
        case TPG_PAT_COLOR_CHECKERS_1X1:
        case TPG_PAT_ALTERNATING_HLINES:
                return line & 1;
        case TPG_PAT_CHECKERS_2X2:
        case TPG_PAT_COLOR_CHECKERS_2X2:
                return (line & 2) >> 1;
        case TPG_PAT_100_COLORSQUARES:
        case TPG_PAT_100_HCOLORBAR:
                return (line * 8) / tpg->src_height;
        case TPG_PAT_CROSS_1_PIXEL:
                return line == tpg->src_height / 2;
        case TPG_PAT_CROSS_2_PIXELS:
                return (line + 1) / 2 == tpg->src_height / 4;
        case TPG_PAT_CROSS_10_PIXELS:
                return (line + 10) / 20 == tpg->src_height / 40;
        default:
                return 0;
        }
}

/*
 * Which color should be used for the given pattern line and X coordinate.
 * Note: x is in the range 0 to 2 * tpg->src_width.
 */
static enum tpg_color tpg_get_color(const struct tpg_data *tpg,
                                    unsigned pat_line, unsigned x)
{
        /* Maximum number of bars are TPG_COLOR_MAX - otherwise, the input print code
           should be modified */
        static const enum tpg_color bars[3][8] = {
                /* Standard ITU-R 75% color bar sequence */
                { TPG_COLOR_CSC_WHITE,   TPG_COLOR_75_YELLOW,
                  TPG_COLOR_75_CYAN,     TPG_COLOR_75_GREEN,
                  TPG_COLOR_75_MAGENTA,  TPG_COLOR_75_RED,
                  TPG_COLOR_75_BLUE,     TPG_COLOR_100_BLACK, },
                /* Standard ITU-R 100% color bar sequence */
                { TPG_COLOR_100_WHITE,   TPG_COLOR_100_YELLOW,
                  TPG_COLOR_100_CYAN,    TPG_COLOR_100_GREEN,
                  TPG_COLOR_100_MAGENTA, TPG_COLOR_100_RED,
                  TPG_COLOR_100_BLUE,    TPG_COLOR_100_BLACK, },
                /* Color bar sequence suitable to test CSC */
                { TPG_COLOR_CSC_WHITE,   TPG_COLOR_CSC_YELLOW,
                  TPG_COLOR_CSC_CYAN,    TPG_COLOR_CSC_GREEN,
                  TPG_COLOR_CSC_MAGENTA, TPG_COLOR_CSC_RED,
                  TPG_COLOR_CSC_BLUE,    TPG_COLOR_CSC_BLACK, },
        };

        switch (tpg->pattern) {
        case TPG_PAT_75_COLORBAR:
        case TPG_PAT_100_COLORBAR:
        case TPG_PAT_CSC_COLORBAR:
                return bars[tpg->pattern][((x * 8) / tpg->src_width) % 8];
        case TPG_PAT_100_COLORSQUARES:
                return bars[1][(pat_line + (x * 8) / tpg->src_width) % 8];
        case TPG_PAT_100_HCOLORBAR:
                return bars[1][pat_line];
        case TPG_PAT_BLACK:
                return TPG_COLOR_100_BLACK;
        case TPG_PAT_WHITE:
                return TPG_COLOR_100_WHITE;
        case TPG_PAT_RED:
                return TPG_COLOR_100_RED;
        case TPG_PAT_GREEN:
                return TPG_COLOR_100_GREEN;
        case TPG_PAT_BLUE:
                return TPG_COLOR_100_BLUE;
        case TPG_PAT_CHECKERS_16X16:
                return (((x >> 4) & 1) ^ (pat_line & 1)) ?
                        TPG_COLOR_100_BLACK : TPG_COLOR_100_WHITE;
        case TPG_PAT_CHECKERS_1X1:
                return ((x & 1) ^ (pat_line & 1)) ?
                        TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
        case TPG_PAT_COLOR_CHECKERS_1X1:
                return ((x & 1) ^ (pat_line & 1)) ?
                        TPG_COLOR_100_RED : TPG_COLOR_100_BLUE;
        case TPG_PAT_CHECKERS_2X2:
                return (((x >> 1) & 1) ^ (pat_line & 1)) ?
                        TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
        case TPG_PAT_COLOR_CHECKERS_2X2:
                return (((x >> 1) & 1) ^ (pat_line & 1)) ?
                        TPG_COLOR_100_RED : TPG_COLOR_100_BLUE;
        case TPG_PAT_ALTERNATING_HLINES:
                return pat_line ? TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
        case TPG_PAT_ALTERNATING_VLINES:
                return (x & 1) ? TPG_COLOR_100_WHITE : TPG_COLOR_100_BLACK;
        case TPG_PAT_CROSS_1_PIXEL:
                if (pat_line || (x % tpg->src_width) == tpg->src_width / 2)
                        return TPG_COLOR_100_BLACK;
                return TPG_COLOR_100_WHITE;
        case TPG_PAT_CROSS_2_PIXELS:
                if (pat_line || ((x % tpg->src_width) + 1) / 2 == tpg->src_width / 4)
                        return TPG_COLOR_100_BLACK;
                return TPG_COLOR_100_WHITE;
        case TPG_PAT_CROSS_10_PIXELS:
                if (pat_line || ((x % tpg->src_width) + 10) / 20 == tpg->src_width / 40)
                        return TPG_COLOR_100_BLACK;
                return TPG_COLOR_100_WHITE;
        case TPG_PAT_GRAY_RAMP:
                return TPG_COLOR_RAMP + ((x % tpg->src_width) * 256) / tpg->src_width;
        default:
                return TPG_COLOR_100_RED;
        }
}

/*
 * Given the pixel aspect ratio and video aspect ratio calculate the
 * coordinates of a centered square and the coordinates of the border of
 * the active video area. The coordinates are relative to the source
 * frame rectangle.
 */
static void tpg_calculate_square_border(struct tpg_data *tpg)
{
        unsigned w = tpg->src_width;
        unsigned h = tpg->src_height;
        unsigned sq_w, sq_h;

        sq_w = (w * 2 / 5) & ~1;
        if (((w - sq_w) / 2) & 1)
                sq_w += 2;
        sq_h = sq_w;
        tpg->square.width = sq_w;
        if (tpg->vid_aspect == TPG_VIDEO_ASPECT_16X9_ANAMORPHIC) {
                unsigned ana_sq_w = (sq_w / 4) * 3;

                if (((w - ana_sq_w) / 2) & 1)
                        ana_sq_w += 2;
                tpg->square.width = ana_sq_w;
        }
        tpg->square.left = (w - tpg->square.width) / 2;
        if (tpg->pix_aspect == TPG_PIXEL_ASPECT_NTSC)
                sq_h = sq_w * 10 / 11;
        else if (tpg->pix_aspect == TPG_PIXEL_ASPECT_PAL)
                sq_h = sq_w * 59 / 54;
        tpg->square.height = sq_h;
        tpg->square.top = (h - sq_h) / 2;
        tpg->border.left = 0;
        tpg->border.width = w;
        tpg->border.top = 0;
        tpg->border.height = h;
        switch (tpg->vid_aspect) {
        case TPG_VIDEO_ASPECT_4X3:
                if (tpg->pix_aspect)
                        return;
                if (3 * w >= 4 * h) {
                        tpg->border.width = ((4 * h) / 3) & ~1;
                        if (((w - tpg->border.width) / 2) & ~1)
                                tpg->border.width -= 2;
                        tpg->border.left = (w - tpg->border.width) / 2;
                        break;
                }
                tpg->border.height = ((3 * w) / 4) & ~1;
                tpg->border.top = (h - tpg->border.height) / 2;
                break;
        case TPG_VIDEO_ASPECT_14X9_CENTRE:
                if (tpg->pix_aspect) {
                        tpg->border.height = tpg->pix_aspect == TPG_PIXEL_ASPECT_NTSC ? 420 : 506;
                        tpg->border.top = (h - tpg->border.height) / 2;
                        break;
                }
                if (9 * w >= 14 * h) {
                        tpg->border.width = ((14 * h) / 9) & ~1;
                        if (((w - tpg->border.width) / 2) & ~1)
                                tpg->border.width -= 2;
                        tpg->border.left = (w - tpg->border.width) / 2;
                        break;
                }
                tpg->border.height = ((9 * w) / 14) & ~1;
                tpg->border.top = (h - tpg->border.height) / 2;
                break;
        case TPG_VIDEO_ASPECT_16X9_CENTRE:
                if (tpg->pix_aspect) {
                        tpg->border.height = tpg->pix_aspect == TPG_PIXEL_ASPECT_NTSC ? 368 : 442;
                        tpg->border.top = (h - tpg->border.height) / 2;
                        break;
                }
                if (9 * w >= 16 * h) {
                        tpg->border.width = ((16 * h) / 9) & ~1;
                        if (((w - tpg->border.width) / 2) & ~1)
                                tpg->border.width -= 2;
                        tpg->border.left = (w - tpg->border.width) / 2;
                        break;
                }
                tpg->border.height = ((9 * w) / 16) & ~1;
                tpg->border.top = (h - tpg->border.height) / 2;
                break;
        default:
                break;
        }
}

static void tpg_precalculate_line(struct tpg_data *tpg)
{
        enum tpg_color contrast;
        u8 pix[TPG_MAX_PLANES][8];
        unsigned pat;
        unsigned p;
        unsigned x;

        switch (tpg->pattern) {
        case TPG_PAT_GREEN:
                contrast = TPG_COLOR_100_RED;
                break;
        case TPG_PAT_CSC_COLORBAR:
                contrast = TPG_COLOR_CSC_GREEN;
                break;
        default:
                contrast = TPG_COLOR_100_GREEN;
                break;
        }

        for (pat = 0; pat < tpg_get_pat_lines(tpg); pat++) {
                /* Coarse scaling with Bresenham */
                unsigned int_part = tpg->src_width / tpg->scaled_width;
                unsigned fract_part = tpg->src_width % tpg->scaled_width;
                unsigned src_x = 0;
                unsigned error = 0;

                for (x = 0; x < tpg->scaled_width * 2; x += 2) {
                        unsigned real_x = src_x;
                        enum tpg_color color1, color2;

                        real_x = tpg->hflip ? tpg->src_width * 2 - real_x - 2 : real_x;
                        color1 = tpg_get_color(tpg, pat, real_x);

                        src_x += int_part;
                        error += fract_part;
                        if (error >= tpg->scaled_width) {
                                error -= tpg->scaled_width;
                                src_x++;
                        }

                        real_x = src_x;
                        real_x = tpg->hflip ? tpg->src_width * 2 - real_x - 2 : real_x;
                        color2 = tpg_get_color(tpg, pat, real_x);

                        src_x += int_part;
                        error += fract_part;
                        if (error >= tpg->scaled_width) {
                                error -= tpg->scaled_width;
                                src_x++;
                        }

                        gen_twopix(tpg, pix, tpg->hflip ? color2 : color1, 0);
                        gen_twopix(tpg, pix, tpg->hflip ? color1 : color2, 1);
                        for (p = 0; p < tpg->planes; p++) {
                                unsigned twopixsize = tpg->twopixelsize[p];
                                unsigned hdiv = tpg->hdownsampling[p];
                                u8 *pos = tpg->lines[pat][p] + tpg_hdiv(tpg, p, x);

                                memcpy(pos, pix[p], twopixsize / hdiv);
                        }
                }
        }

        if (tpg->vdownsampling[tpg->planes - 1] > 1) {
                unsigned pat_lines = tpg_get_pat_lines(tpg);

                for (pat = 0; pat < pat_lines; pat++) {
                        unsigned next_pat = (pat + 1) % pat_lines;

                        for (p = 1; p < tpg->planes; p++) {
                                unsigned w = tpg_hdiv(tpg, p, tpg->scaled_width * 2);
                                u8 *pos1 = tpg->lines[pat][p];
                                u8 *pos2 = tpg->lines[next_pat][p];
                                u8 *dest = tpg->downsampled_lines[pat][p];

                                for (x = 0; x < w; x++, pos1++, pos2++, dest++)
                                        *dest = ((u16)*pos1 + (u16)*pos2) / 2;
                        }
                }
        }

        gen_twopix(tpg, pix, contrast, 0);
        gen_twopix(tpg, pix, contrast, 1);
        for (p = 0; p < tpg->planes; p++) {
                unsigned twopixsize = tpg->twopixelsize[p];
                u8 *pos = tpg->contrast_line[p];

                for (x = 0; x < tpg->scaled_width; x += 2, pos += twopixsize)
                        memcpy(pos, pix[p], twopixsize);
        }

        gen_twopix(tpg, pix, TPG_COLOR_100_BLACK, 0);
        gen_twopix(tpg, pix, TPG_COLOR_100_BLACK, 1);
        for (p = 0; p < tpg->planes; p++) {
                unsigned twopixsize = tpg->twopixelsize[p];
                u8 *pos = tpg->black_line[p];

                for (x = 0; x < tpg->scaled_width; x += 2, pos += twopixsize)
                        memcpy(pos, pix[p], twopixsize);
        }

        for (x = 0; x < tpg->scaled_width * 2; x += 2) {
                gen_twopix(tpg, pix, TPG_COLOR_RANDOM, 0);
                gen_twopix(tpg, pix, TPG_COLOR_RANDOM, 1);
                for (p = 0; p < tpg->planes; p++) {
                        unsigned twopixsize = tpg->twopixelsize[p];
                        u8 *pos = tpg->random_line[p] + x * twopixsize / 2;

                        memcpy(pos, pix[p], twopixsize);
                }
        }

        gen_twopix(tpg, tpg->textbg, TPG_COLOR_TEXTBG, 0);
        gen_twopix(tpg, tpg->textbg, TPG_COLOR_TEXTBG, 1);
        gen_twopix(tpg, tpg->textfg, TPG_COLOR_TEXTFG, 0);
        gen_twopix(tpg, tpg->textfg, TPG_COLOR_TEXTFG, 1);
}

/* need this to do rgb24 rendering */
typedef struct { u16 __; u8 _; } __packed x24;

#define PRINTSTR(PIXTYPE) do {        \
        unsigned vdiv = tpg->vdownsampling[p]; \
        unsigned hdiv = tpg->hdownsampling[p]; \
        int line;        \
        PIXTYPE fg;        \
        PIXTYPE bg;        \
        memcpy(&fg, tpg->textfg[p], sizeof(PIXTYPE));        \
        memcpy(&bg, tpg->textbg[p], sizeof(PIXTYPE));        \
        \
        for (line = first; line < 16; line += vdiv * step) {        \
                int l = tpg->vflip ? 15 - line : line; \
                PIXTYPE *pos = (PIXTYPE *)(basep[p][(line / vdiv) & 1] + \
                               ((y * step + l) / (vdiv * div)) * tpg->bytesperline[p] + \
                               (x / hdiv) * sizeof(PIXTYPE));        \
                unsigned s;        \
        \
                for (s = 0; s < len; s++) {        \
                        u8 chr = font8x16[(u8)text[s] * 16 + line];        \
        \
                        if (hdiv == 2 && tpg->hflip) { \
                                pos[3] = (chr & (0x01 << 6) ? fg : bg);        \
                                pos[2] = (chr & (0x01 << 4) ? fg : bg);        \
                                pos[1] = (chr & (0x01 << 2) ? fg : bg);        \
                                pos[0] = (chr & (0x01 << 0) ? fg : bg);        \
                        } else if (hdiv == 2) { \
                                pos[0] = (chr & (0x01 << 7) ? fg : bg);        \
                                pos[1] = (chr & (0x01 << 5) ? fg : bg);        \
                                pos[2] = (chr & (0x01 << 3) ? fg : bg);        \
                                pos[3] = (chr & (0x01 << 1) ? fg : bg);        \
                        } else if (tpg->hflip) { \
                                pos[7] = (chr & (0x01 << 7) ? fg : bg);        \
                                pos[6] = (chr & (0x01 << 6) ? fg : bg);        \
                                pos[5] = (chr & (0x01 << 5) ? fg : bg);        \
                                pos[4] = (chr & (0x01 << 4) ? fg : bg);        \
                                pos[3] = (chr & (0x01 << 3) ? fg : bg);        \
                                pos[2] = (chr & (0x01 << 2) ? fg : bg);        \
                                pos[1] = (chr & (0x01 << 1) ? fg : bg);        \
                                pos[0] = (chr & (0x01 << 0) ? fg : bg);        \
                        } else { \
                                pos[0] = (chr & (0x01 << 7) ? fg : bg);        \
                                pos[1] = (chr & (0x01 << 6) ? fg : bg);        \
                                pos[2] = (chr & (0x01 << 5) ? fg : bg);        \
                                pos[3] = (chr & (0x01 << 4) ? fg : bg);        \
                                pos[4] = (chr & (0x01 << 3) ? fg : bg);        \
                                pos[5] = (chr & (0x01 << 2) ? fg : bg);        \
                                pos[6] = (chr & (0x01 << 1) ? fg : bg);        \
                                pos[7] = (chr & (0x01 << 0) ? fg : bg);        \
                        } \
        \
                        pos += (tpg->hflip ? -8 : 8) / (int)hdiv;        \
                }        \
        }        \
} while (0)

static noinline void tpg_print_str_2(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
                        unsigned p, unsigned first, unsigned div, unsigned step,
                        int y, int x, const char *text, unsigned len)
{
        PRINTSTR(u8);
}

static noinline void tpg_print_str_4(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
                        unsigned p, unsigned first, unsigned div, unsigned step,
                        int y, int x, const char *text, unsigned len)
{
        PRINTSTR(u16);
}

static noinline void tpg_print_str_6(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
                        unsigned p, unsigned first, unsigned div, unsigned step,
                        int y, int x, const char *text, unsigned len)
{
        PRINTSTR(x24);
}

static noinline void tpg_print_str_8(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
                        unsigned p, unsigned first, unsigned div, unsigned step,
                        int y, int x, const char *text, unsigned len)
{
        PRINTSTR(u32);
}

void tpg_gen_text(const struct tpg_data *tpg, u8 *basep[TPG_MAX_PLANES][2],
                  int y, int x, const char *text)
{
        unsigned step = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;
        unsigned div = step;
        unsigned first = 0;
        unsigned len;
        unsigned p;

        if (font8x16 == NULL || basep == NULL || text == NULL)
                return;

        len = strlen(text);

        /* Checks if it is possible to show string */
        if (y + 16 >= tpg->compose.height || x + 8 >= tpg->compose.width)
                return;

        if (len > (tpg->compose.width - x) / 8)
                len = (tpg->compose.width - x) / 8;
        if (tpg->vflip)
                y = tpg->compose.height - y - 16;
        if (tpg->hflip)
                x = tpg->compose.width - x - 8;
        y += tpg->compose.top;
        x += tpg->compose.left;
        if (tpg->field == V4L2_FIELD_BOTTOM)
                first = 1;
        else if (tpg->field == V4L2_FIELD_SEQ_TB || tpg->field == V4L2_FIELD_SEQ_BT)
                div = 2;

        for (p = 0; p < tpg->planes; p++) {
                /* Print text */
                switch (tpg->twopixelsize[p]) {
                case 2:
                        tpg_print_str_2(tpg, basep, p, first, div, step, y, x,
                                        text, len);
                        break;
                case 4:
                        tpg_print_str_4(tpg, basep, p, first, div, step, y, x,
                                        text, len);
                        break;
                case 6:
                        tpg_print_str_6(tpg, basep, p, first, div, step, y, x,
                                        text, len);
                        break;
                case 8:
                        tpg_print_str_8(tpg, basep, p, first, div, step, y, x,
                                        text, len);
                        break;
                }
        }
}
EXPORT_SYMBOL_GPL(tpg_gen_text);

const char *tpg_g_color_order(const struct tpg_data *tpg)
{
        switch (tpg->pattern) {
        case TPG_PAT_75_COLORBAR:
        case TPG_PAT_100_COLORBAR:
        case TPG_PAT_CSC_COLORBAR:
        case TPG_PAT_100_HCOLORBAR:
                return "White, yellow, cyan, green, magenta, red, blue, black";
        case TPG_PAT_BLACK:
                return "Black";
        case TPG_PAT_WHITE:
                return "White";
        case TPG_PAT_RED:
                return "Red";
        case TPG_PAT_GREEN:
                return "Green";
        case TPG_PAT_BLUE:
                return "Blue";
        default:
                return NULL;
        }
}
EXPORT_SYMBOL_GPL(tpg_g_color_order);

void tpg_update_mv_step(struct tpg_data *tpg)
{
        int factor = tpg->mv_hor_mode > TPG_MOVE_NONE ? -1 : 1;

        if (tpg->hflip)
                factor = -factor;
        switch (tpg->mv_hor_mode) {
        case TPG_MOVE_NEG_FAST:
        case TPG_MOVE_POS_FAST:
                tpg->mv_hor_step = ((tpg->src_width + 319) / 320) * 4;
                break;
        case TPG_MOVE_NEG:
        case TPG_MOVE_POS:
                tpg->mv_hor_step = ((tpg->src_width + 639) / 640) * 4;
                break;
        case TPG_MOVE_NEG_SLOW:
        case TPG_MOVE_POS_SLOW:
                tpg->mv_hor_step = 2;
                break;
        case TPG_MOVE_NONE:
                tpg->mv_hor_step = 0;
                break;
        }
        if (factor < 0)
                tpg->mv_hor_step = tpg->src_width - tpg->mv_hor_step;

        factor = tpg->mv_vert_mode > TPG_MOVE_NONE ? -1 : 1;
        switch (tpg->mv_vert_mode) {
        case TPG_MOVE_NEG_FAST:
        case TPG_MOVE_POS_FAST:
                tpg->mv_vert_step = ((tpg->src_width + 319) / 320) * 4;
                break;
        case TPG_MOVE_NEG:
        case TPG_MOVE_POS:
                tpg->mv_vert_step = ((tpg->src_width + 639) / 640) * 4;
                break;
        case TPG_MOVE_NEG_SLOW:
        case TPG_MOVE_POS_SLOW:
                tpg->mv_vert_step = 1;
                break;
        case TPG_MOVE_NONE:
                tpg->mv_vert_step = 0;
                break;
        }
        if (factor < 0)
                tpg->mv_vert_step = tpg->src_height - tpg->mv_vert_step;
}
EXPORT_SYMBOL_GPL(tpg_update_mv_step);

/* Map the line number relative to the crop rectangle to a frame line number */
static unsigned tpg_calc_frameline(const struct tpg_data *tpg, unsigned src_y,
                                    unsigned field)
{
        switch (field) {
        case V4L2_FIELD_TOP:
                return tpg->crop.top + src_y * 2;
        case V4L2_FIELD_BOTTOM:
                return tpg->crop.top + src_y * 2 + 1;
        default:
                return src_y + tpg->crop.top;
        }
}

/*
 * Map the line number relative to the compose rectangle to a destination
 * buffer line number.
 */
static unsigned tpg_calc_buffer_line(const struct tpg_data *tpg, unsigned y,
                                    unsigned field)
{
        y += tpg->compose.top;
        switch (field) {
        case V4L2_FIELD_SEQ_TB:
                if (y & 1)
                        return tpg->buf_height / 2 + y / 2;
                return y / 2;
        case V4L2_FIELD_SEQ_BT:
                if (y & 1)
                        return y / 2;
                return tpg->buf_height / 2 + y / 2;
        default:
                return y;
        }
}

static void tpg_recalc(struct tpg_data *tpg)
{
        if (tpg->recalc_colors) {
                tpg->recalc_colors = false;
                tpg->recalc_lines = true;
                tpg->real_xfer_func = tpg->xfer_func;
                tpg->real_ycbcr_enc = tpg->ycbcr_enc;
                tpg->real_hsv_enc = tpg->hsv_enc;
                tpg->real_quantization = tpg->quantization;

                if (tpg->xfer_func == V4L2_XFER_FUNC_DEFAULT)
                        tpg->real_xfer_func =
                                V4L2_MAP_XFER_FUNC_DEFAULT(tpg->colorspace);

                if (tpg->ycbcr_enc == V4L2_YCBCR_ENC_DEFAULT)
                        tpg->real_ycbcr_enc =
                                V4L2_MAP_YCBCR_ENC_DEFAULT(tpg->colorspace);

                if (tpg->quantization == V4L2_QUANTIZATION_DEFAULT)
                        tpg->real_quantization =
                                V4L2_MAP_QUANTIZATION_DEFAULT(
                                        tpg->color_enc != TGP_COLOR_ENC_YCBCR,
                                        tpg->colorspace, tpg->real_ycbcr_enc);

                tpg_precalculate_colors(tpg);
        }
        if (tpg->recalc_square_border) {
                tpg->recalc_square_border = false;
                tpg_calculate_square_border(tpg);
        }
        if (tpg->recalc_lines) {
                tpg->recalc_lines = false;
                tpg_precalculate_line(tpg);
        }
}

void tpg_calc_text_basep(struct tpg_data *tpg,
                u8 *basep[TPG_MAX_PLANES][2], unsigned p, u8 *vbuf)
{
        unsigned stride = tpg->bytesperline[p];
        unsigned h = tpg->buf_height;

        tpg_recalc(tpg);

        basep[p][0] = vbuf;
        basep[p][1] = vbuf;
        h /= tpg->vdownsampling[p];
        if (tpg->field == V4L2_FIELD_SEQ_TB)
                basep[p][1] += h * stride / 2;
        else if (tpg->field == V4L2_FIELD_SEQ_BT)
                basep[p][0] += h * stride / 2;
        if (p == 0 && tpg->interleaved)
                tpg_calc_text_basep(tpg, basep, 1, vbuf);
}
EXPORT_SYMBOL_GPL(tpg_calc_text_basep);

static int tpg_pattern_avg(const struct tpg_data *tpg,
                           unsigned pat1, unsigned pat2)
{
        unsigned pat_lines = tpg_get_pat_lines(tpg);

        if (pat1 == (pat2 + 1) % pat_lines)
                return pat2;
        if (pat2 == (pat1 + 1) % pat_lines)
                return pat1;
        return -1;
}

static const char *tpg_color_enc_str(enum tgp_color_enc
                                                 color_enc)
{
        switch (color_enc) {
        case TGP_COLOR_ENC_HSV:
                return "HSV";
        case TGP_COLOR_ENC_YCBCR:
                return "Y'CbCr";
        case TGP_COLOR_ENC_LUMA:
                return "Luma";
        case TGP_COLOR_ENC_RGB:
        default:
                return "R'G'B";

        }
}

void tpg_log_status(struct tpg_data *tpg)
{
        pr_info("tpg source WxH: %ux%u (%s)\n",
                tpg->src_width, tpg->src_height,
                tpg_color_enc_str(tpg->color_enc));
        pr_info("tpg field: %u\n", tpg->field);
        pr_info("tpg crop: %ux%u@%dx%d\n", tpg->crop.width, tpg->crop.height,
                        tpg->crop.left, tpg->crop.top);
        pr_info("tpg compose: %ux%u@%dx%d\n", tpg->compose.width, tpg->compose.height,
                        tpg->compose.left, tpg->compose.top);
        pr_info("tpg colorspace: %d\n", tpg->colorspace);
        pr_info("tpg transfer function: %d/%d\n", tpg->xfer_func, tpg->real_xfer_func);
        if (tpg->color_enc == TGP_COLOR_ENC_HSV)
                pr_info("tpg HSV encoding: %d/%d\n",
                        tpg->hsv_enc, tpg->real_hsv_enc);
        else if (tpg->color_enc == TGP_COLOR_ENC_YCBCR)
                pr_info("tpg Y'CbCr encoding: %d/%d\n",
                        tpg->ycbcr_enc, tpg->real_ycbcr_enc);
        pr_info("tpg quantization: %d/%d\n", tpg->quantization, tpg->real_quantization);
        pr_info("tpg RGB range: %d/%d\n", tpg->rgb_range, tpg->real_rgb_range);
}
EXPORT_SYMBOL_GPL(tpg_log_status);

/*
 * This struct contains common parameters used by both the drawing of the
 * test pattern and the drawing of the extras (borders, square, etc.)
 */
struct tpg_draw_params {
        /* common data */
        bool is_tv;
        bool is_60hz;
        unsigned twopixsize;
        unsigned img_width;
        unsigned stride;
        unsigned hmax;
        unsigned frame_line;
        unsigned frame_line_next;

        /* test pattern */
        unsigned mv_hor_old;
        unsigned mv_hor_new;
        unsigned mv_vert_old;
        unsigned mv_vert_new;

        /* extras */
        unsigned wss_width;
        unsigned wss_random_offset;
        unsigned sav_eav_f;
        unsigned left_pillar_width;
        unsigned right_pillar_start;
};

static void tpg_fill_params_pattern(const struct tpg_data *tpg, unsigned p,
                                    struct tpg_draw_params *params)
{
        params->mv_hor_old =
                tpg_hscale_div(tpg, p, tpg->mv_hor_count % tpg->src_width);
        params->mv_hor_new =
                tpg_hscale_div(tpg, p, (tpg->mv_hor_count + tpg->mv_hor_step) %
                               tpg->src_width);
        params->mv_vert_old = tpg->mv_vert_count % tpg->src_height;
        params->mv_vert_new =
                (tpg->mv_vert_count + tpg->mv_vert_step) % tpg->src_height;
}

static void tpg_fill_params_extras(const struct tpg_data *tpg,
                                   unsigned p,
                                   struct tpg_draw_params *params)
{
        unsigned left_pillar_width = 0;
        unsigned right_pillar_start = params->img_width;

        params->wss_width = tpg->crop.left < tpg->src_width / 2 ?
                tpg->src_width / 2 - tpg->crop.left : 0;
        if (params->wss_width > tpg->crop.width)
                params->wss_width = tpg->crop.width;
        params->wss_width = tpg_hscale_div(tpg, p, params->wss_width);
        params->wss_random_offset =
                params->twopixsize * get_random_u32_below(tpg->src_width / 2);

        if (tpg->crop.left < tpg->border.left) {
                left_pillar_width = tpg->border.left - tpg->crop.left;
                if (left_pillar_width > tpg->crop.width)
                        left_pillar_width = tpg->crop.width;
                left_pillar_width = tpg_hscale_div(tpg, p, left_pillar_width);
        }
        params->left_pillar_width = left_pillar_width;

        if (tpg->crop.left + tpg->crop.width >
            tpg->border.left + tpg->border.width) {
                right_pillar_start =
                        tpg->border.left + tpg->border.width - tpg->crop.left;
                right_pillar_start =
                        tpg_hscale_div(tpg, p, right_pillar_start);
                if (right_pillar_start > params->img_width)
                        right_pillar_start = params->img_width;
        }
        params->right_pillar_start = right_pillar_start;

        params->sav_eav_f = tpg->field ==
                        (params->is_60hz ? V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM);
}

static void tpg_fill_plane_extras(const struct tpg_data *tpg,
                                  const struct tpg_draw_params *params,
                                  unsigned p, unsigned h, u8 *vbuf)
{
        unsigned twopixsize = params->twopixsize;
        unsigned img_width = params->img_width;
        unsigned frame_line = params->frame_line;
        const struct v4l2_rect *sq = &tpg->square;
        const struct v4l2_rect *b = &tpg->border;
        const struct v4l2_rect *c = &tpg->crop;

        if (params->is_tv && !params->is_60hz &&
            frame_line == 0 && params->wss_width) {
                /*
                 * Replace the first half of the top line of a 50 Hz frame
                 * with random data to simulate a WSS signal.
                 */
                u8 *wss = tpg->random_line[p] + params->wss_random_offset;

                memcpy(vbuf, wss, params->wss_width);
        }

        if (tpg->show_border && frame_line >= b->top &&
            frame_line < b->top + b->height) {
                unsigned bottom = b->top + b->height - 1;
                unsigned left = params->left_pillar_width;
                unsigned right = params->right_pillar_start;

                if (frame_line == b->top || frame_line == b->top + 1 ||
                    frame_line == bottom || frame_line == bottom - 1) {
                        memcpy(vbuf + left, tpg->contrast_line[p],
                                        right - left);
                } else {
                        if (b->left >= c->left &&
                            b->left < c->left + c->width)
                                memcpy(vbuf + left,
                                        tpg->contrast_line[p], twopixsize);
                        if (b->left + b->width > c->left &&
                            b->left + b->width <= c->left + c->width)
                                memcpy(vbuf + right - twopixsize,
                                        tpg->contrast_line[p], twopixsize);
                }
        }
        if (tpg->qual != TPG_QUAL_NOISE && frame_line >= b->top &&
            frame_line < b->top + b->height) {
                memcpy(vbuf, tpg->black_line[p], params->left_pillar_width);
                memcpy(vbuf + params->right_pillar_start, tpg->black_line[p],
                       img_width - params->right_pillar_start);
        }
        if (tpg->show_square && frame_line >= sq->top &&
            frame_line < sq->top + sq->height &&
            sq->left < c->left + c->width &&
            sq->left + sq->width >= c->left) {
                unsigned left = sq->left;
                unsigned width = sq->width;

                if (c->left > left) {
                        width -= c->left - left;
                        left = c->left;
                }
                if (c->left + c->width < left + width)
                        width -= left + width - c->left - c->width;
                left -= c->left;
                left = tpg_hscale_div(tpg, p, left);
                width = tpg_hscale_div(tpg, p, width);
                memcpy(vbuf + left, tpg->contrast_line[p], width);
        }
        if (tpg->insert_sav) {
                unsigned offset = tpg_hdiv(tpg, p, tpg->compose.width / 3);
                u8 *p = vbuf + offset;
                unsigned vact = 0, hact = 0;

                p[0] = 0xff;
                p[1] = 0;
                p[2] = 0;
                p[3] = 0x80 | (params->sav_eav_f << 6) |
                        (vact << 5) | (hact << 4) |
                        ((hact ^ vact) << 3) |
                        ((hact ^ params->sav_eav_f) << 2) |
                        ((params->sav_eav_f ^ vact) << 1) |
                        (hact ^ vact ^ params->sav_eav_f);
        }
        if (tpg->insert_eav) {
                unsigned offset = tpg_hdiv(tpg, p, tpg->compose.width * 2 / 3);
                u8 *p = vbuf + offset;
                unsigned vact = 0, hact = 1;

                p[0] = 0xff;
                p[1] = 0;
                p[2] = 0;
                p[3] = 0x80 | (params->sav_eav_f << 6) |
                        (vact << 5) | (hact << 4) |
                        ((hact ^ vact) << 3) |
                        ((hact ^ params->sav_eav_f) << 2) |
                        ((params->sav_eav_f ^ vact) << 1) |
                        (hact ^ vact ^ params->sav_eav_f);
        }
        if (tpg->insert_hdmi_video_guard_band) {
                unsigned int i;

                switch (tpg->fourcc) {
                case V4L2_PIX_FMT_BGR24:
                case V4L2_PIX_FMT_RGB24:
                        for (i = 0; i < 3 * 4; i += 3) {
                                vbuf[i] = 0xab;
                                vbuf[i + 1] = 0x55;
                                vbuf[i + 2] = 0xab;
                        }
                        break;
                case V4L2_PIX_FMT_RGB32:
                case V4L2_PIX_FMT_ARGB32:
                case V4L2_PIX_FMT_XRGB32:
                case V4L2_PIX_FMT_BGRX32:
                case V4L2_PIX_FMT_BGRA32:
                        for (i = 0; i < 4 * 4; i += 4) {
                                vbuf[i] = 0x00;
                                vbuf[i + 1] = 0xab;
                                vbuf[i + 2] = 0x55;
                                vbuf[i + 3] = 0xab;
                        }
                        break;
                case V4L2_PIX_FMT_BGR32:
                case V4L2_PIX_FMT_XBGR32:
                case V4L2_PIX_FMT_ABGR32:
                case V4L2_PIX_FMT_RGBX32:
                case V4L2_PIX_FMT_RGBA32:
                        for (i = 0; i < 4 * 4; i += 4) {
                                vbuf[i] = 0xab;
                                vbuf[i + 1] = 0x55;
                                vbuf[i + 2] = 0xab;
                                vbuf[i + 3] = 0x00;
                        }
                        break;
                }
        }
}

static void tpg_fill_plane_pattern(const struct tpg_data *tpg,
                                   const struct tpg_draw_params *params,
                                   unsigned p, unsigned h, u8 *vbuf)
{
        unsigned twopixsize = params->twopixsize;
        unsigned img_width = params->img_width;
        unsigned mv_hor_old = params->mv_hor_old;
        unsigned mv_hor_new = params->mv_hor_new;
        unsigned mv_vert_old = params->mv_vert_old;
        unsigned mv_vert_new = params->mv_vert_new;
        unsigned frame_line = params->frame_line;
        unsigned frame_line_next = params->frame_line_next;
        unsigned line_offset = tpg_hscale_div(tpg, p, tpg->crop.left);
        bool even;
        bool fill_blank = false;
        unsigned pat_line_old;
        unsigned pat_line_new;
        u8 *linestart_older;
        u8 *linestart_newer;
        u8 *linestart_top;
        u8 *linestart_bottom;

        even = !(frame_line & 1);

        if (h >= params->hmax) {
                if (params->hmax == tpg->compose.height)
                        return;
                if (!tpg->perc_fill_blank)
                        return;
                fill_blank = true;
        }

        if (tpg->vflip) {
                frame_line = tpg->src_height - frame_line - 1;
                frame_line_next = tpg->src_height - frame_line_next - 1;
        }

        if (fill_blank) {
                linestart_older = tpg->contrast_line[p];
                linestart_newer = tpg->contrast_line[p];
        } else if (tpg->qual != TPG_QUAL_NOISE &&
                   (frame_line < tpg->border.top ||
                    frame_line >= tpg->border.top + tpg->border.height)) {
                linestart_older = tpg->black_line[p];
                linestart_newer = tpg->black_line[p];
        } else if (tpg->pattern == TPG_PAT_NOISE || tpg->qual == TPG_QUAL_NOISE) {
                linestart_older = tpg->random_line[p] +
                                  twopixsize * get_random_u32_below(tpg->src_width / 2);
                linestart_newer = tpg->random_line[p] +
                                  twopixsize * get_random_u32_below(tpg->src_width / 2);
        } else {
                unsigned frame_line_old =
                        (frame_line + mv_vert_old) % tpg->src_height;
                unsigned frame_line_new =
                        (frame_line + mv_vert_new) % tpg->src_height;
                unsigned pat_line_next_old;
                unsigned pat_line_next_new;

                pat_line_old = tpg_get_pat_line(tpg, frame_line_old);
                pat_line_new = tpg_get_pat_line(tpg, frame_line_new);
                linestart_older = tpg->lines[pat_line_old][p] + mv_hor_old;
                linestart_newer = tpg->lines[pat_line_new][p] + mv_hor_new;

                if (tpg->vdownsampling[p] > 1 && frame_line != frame_line_next) {
                        int avg_pat;

                        /*
                         * Now decide whether we need to use downsampled_lines[].
                         * That's necessary if the two lines use different patterns.
                         */
                        pat_line_next_old = tpg_get_pat_line(tpg,
                                        (frame_line_next + mv_vert_old) % tpg->src_height);
                        pat_line_next_new = tpg_get_pat_line(tpg,
                                        (frame_line_next + mv_vert_new) % tpg->src_height);

                        switch (tpg->field) {
                        case V4L2_FIELD_INTERLACED:
                        case V4L2_FIELD_INTERLACED_BT:
                        case V4L2_FIELD_INTERLACED_TB:
                                avg_pat = tpg_pattern_avg(tpg, pat_line_old, pat_line_new);
                                if (avg_pat < 0)
                                        break;
                                linestart_older = tpg->downsampled_lines[avg_pat][p] + mv_hor_old;
                                linestart_newer = linestart_older;
                                break;
                        case V4L2_FIELD_NONE:
                        case V4L2_FIELD_TOP:
                        case V4L2_FIELD_BOTTOM:
                        case V4L2_FIELD_SEQ_BT:
                        case V4L2_FIELD_SEQ_TB:
                                avg_pat = tpg_pattern_avg(tpg, pat_line_old, pat_line_next_old);
                                if (avg_pat >= 0)
                                        linestart_older = tpg->downsampled_lines[avg_pat][p] +
                                                mv_hor_old;
                                avg_pat = tpg_pattern_avg(tpg, pat_line_new, pat_line_next_new);
                                if (avg_pat >= 0)
                                        linestart_newer = tpg->downsampled_lines[avg_pat][p] +
                                                mv_hor_new;
                                break;
                        }
                }
                linestart_older += line_offset;
                linestart_newer += line_offset;
        }
        if (tpg->field_alternate) {
                linestart_top = linestart_bottom = linestart_older;
        } else if (params->is_60hz) {
                linestart_top = linestart_newer;
                linestart_bottom = linestart_older;
        } else {
                linestart_top = linestart_older;
                linestart_bottom = linestart_newer;
        }

        switch (tpg->field) {
        case V4L2_FIELD_INTERLACED:
        case V4L2_FIELD_INTERLACED_TB:
        case V4L2_FIELD_SEQ_TB:
        case V4L2_FIELD_SEQ_BT:
                if (even)
                        memcpy(vbuf, linestart_top, img_width);
                else
                        memcpy(vbuf, linestart_bottom, img_width);
                break;
        case V4L2_FIELD_INTERLACED_BT:
                if (even)
                        memcpy(vbuf, linestart_bottom, img_width);
                else
                        memcpy(vbuf, linestart_top, img_width);
                break;
        case V4L2_FIELD_TOP:
                memcpy(vbuf, linestart_top, img_width);
                break;
        case V4L2_FIELD_BOTTOM:
                memcpy(vbuf, linestart_bottom, img_width);
                break;
        case V4L2_FIELD_NONE:
        default:
                memcpy(vbuf, linestart_older, img_width);
                break;
        }
}

void tpg_fill_plane_buffer(struct tpg_data *tpg, v4l2_std_id std,
                           unsigned p, u8 *vbuf)
{
        struct tpg_draw_params params;
        unsigned factor = V4L2_FIELD_HAS_T_OR_B(tpg->field) ? 2 : 1;

        /* Coarse scaling with Bresenham */
        unsigned int_part = (tpg->crop.height / factor) / tpg->compose.height;
        unsigned fract_part = (tpg->crop.height / factor) % tpg->compose.height;
        unsigned src_y = 0;
        unsigned error = 0;
        unsigned h;

        tpg_recalc(tpg);

        params.is_tv = std;
        params.is_60hz = std & V4L2_STD_525_60;
        params.twopixsize = tpg->twopixelsize[p];
        params.img_width = tpg_hdiv(tpg, p, tpg->compose.width);
        params.stride = tpg->bytesperline[p];
        params.hmax = (tpg->compose.height * tpg->perc_fill) / 100;

        tpg_fill_params_pattern(tpg, p, &params);
        tpg_fill_params_extras(tpg, p, &params);

        vbuf += tpg_hdiv(tpg, p, tpg->compose.left);

        for (h = 0; h < tpg->compose.height; h++) {
                unsigned buf_line;

                params.frame_line = tpg_calc_frameline(tpg, src_y, tpg->field);
                params.frame_line_next = params.frame_line;
                buf_line = tpg_calc_buffer_line(tpg, h, tpg->field);
                src_y += int_part;
                error += fract_part;
                if (error >= tpg->compose.height) {
                        error -= tpg->compose.height;
                        src_y++;
                }

                /*
                 * For line-interleaved formats determine the 'plane'
                 * based on the buffer line.
                 */
                if (tpg_g_interleaved(tpg))
                        p = tpg_g_interleaved_plane(tpg, buf_line);

                if (tpg->vdownsampling[p] > 1) {
                        /*
                         * When doing vertical downsampling the field setting
                         * matters: for SEQ_BT/TB we downsample each field
                         * separately (i.e. lines 0+2 are combined, as are
                         * lines 1+3), for the other field settings we combine
                         * odd and even lines. Doing that for SEQ_BT/TB would
                         * be really weird.
                         */
                        if (tpg->field == V4L2_FIELD_SEQ_BT ||
                            tpg->field == V4L2_FIELD_SEQ_TB) {
                                unsigned next_src_y = src_y;

                                if ((h & 3) >= 2)
                                        continue;
                                next_src_y += int_part;
                                if (error + fract_part >= tpg->compose.height)
                                        next_src_y++;
                                params.frame_line_next =
                                        tpg_calc_frameline(tpg, next_src_y, tpg->field);
                        } else {
                                if (h & 1)
                                        continue;
                                params.frame_line_next =
                                        tpg_calc_frameline(tpg, src_y, tpg->field);
                        }

                        buf_line /= tpg->vdownsampling[p];
                }
                tpg_fill_plane_pattern(tpg, &params, p, h,
                                vbuf + buf_line * params.stride);
                tpg_fill_plane_extras(tpg, &params, p, h,
                                vbuf + buf_line * params.stride);
        }
}
EXPORT_SYMBOL_GPL(tpg_fill_plane_buffer);

void tpg_fillbuffer(struct tpg_data *tpg, v4l2_std_id std, unsigned p, u8 *vbuf)
{
        unsigned offset = 0;
        unsigned i;

        if (tpg->buffers > 1) {
                tpg_fill_plane_buffer(tpg, std, p, vbuf);
                return;
        }

        for (i = 0; i < tpg_g_planes(tpg); i++) {
                tpg_fill_plane_buffer(tpg, std, i, vbuf + offset);
                offset += tpg_calc_plane_size(tpg, i);
        }
}
EXPORT_SYMBOL_GPL(tpg_fillbuffer);

MODULE_DESCRIPTION("V4L2 Test Pattern Generator");
MODULE_AUTHOR("Hans Verkuil");
MODULE_LICENSE("GPL");






















































    2 










    1 


    1 





















































    1 


















































































































































































































































































   35 














    4 


















   39 

















   33 
    6 



   24 

   15 
   39 



   39 






   39 





   35 






    4 






    4 




    4 




























   39 












   39 




   39 





   39 


   39 




   15 

   24 






   23 
    7 
   11 

   39 



   27 


   12 

   33 




    6 

   24 



   15 

   39 











   39 








   38 




   39 














    2 
































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2005 Marc Kleine-Budde, Pengutronix
 * Copyright (C) 2006 Andrey Volkov, Varma Electronics
 * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
 * Copyright (C) 2021 Vincent Mailhol <mailhol.vincent@wanadoo.fr>
 */

#include <linux/can/dev.h>
#include <net/rtnetlink.h>

static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = {
        [IFLA_CAN_STATE] = { .type = NLA_U32 },
        [IFLA_CAN_CTRLMODE] = { .len = sizeof(struct can_ctrlmode) },
        [IFLA_CAN_RESTART_MS] = { .type = NLA_U32 },
        [IFLA_CAN_RESTART] = { .type = NLA_U32 },
        [IFLA_CAN_BITTIMING] = { .len = sizeof(struct can_bittiming) },
        [IFLA_CAN_BITTIMING_CONST] = { .len = sizeof(struct can_bittiming_const) },
        [IFLA_CAN_CLOCK] = { .len = sizeof(struct can_clock) },
        [IFLA_CAN_BERR_COUNTER] = { .len = sizeof(struct can_berr_counter) },
        [IFLA_CAN_DATA_BITTIMING] = { .len = sizeof(struct can_bittiming) },
        [IFLA_CAN_DATA_BITTIMING_CONST]        = { .len = sizeof(struct can_bittiming_const) },
        [IFLA_CAN_TERMINATION] = { .type = NLA_U16 },
        [IFLA_CAN_TDC] = { .type = NLA_NESTED },
        [IFLA_CAN_CTRLMODE_EXT] = { .type = NLA_NESTED },
};

static const struct nla_policy can_tdc_policy[IFLA_CAN_TDC_MAX + 1] = {
        [IFLA_CAN_TDC_TDCV_MIN] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCV_MAX] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCO_MIN] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCO_MAX] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCF_MIN] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCF_MAX] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCV] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCO] = { .type = NLA_U32 },
        [IFLA_CAN_TDC_TDCF] = { .type = NLA_U32 },
};

static int can_validate_bittiming(const struct can_bittiming *bt,
                                  struct netlink_ext_ack *extack)
{
        /* sample point is in one-tenth of a percent */
        if (bt->sample_point >= 1000) {
                NL_SET_ERR_MSG(extack, "sample point must be between 0 and 100%");

                return -EINVAL;
        }

        return 0;
}

static int can_validate(struct nlattr *tb[], struct nlattr *data[],
                        struct netlink_ext_ack *extack)
{
        bool is_can_fd = false;
        int err;

        /* Make sure that valid CAN FD configurations always consist of
         * - nominal/arbitration bittiming
         * - data bittiming
         * - control mode with CAN_CTRLMODE_FD set
         * - TDC parameters are coherent (details below)
         */

        if (!data)
                return 0;

        if (data[IFLA_CAN_BITTIMING]) {
                struct can_bittiming bt;

                memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
                err = can_validate_bittiming(&bt, extack);
                if (err)
                        return err;
        }

        if (data[IFLA_CAN_CTRLMODE]) {
                struct can_ctrlmode *cm = nla_data(data[IFLA_CAN_CTRLMODE]);
                u32 tdc_flags = cm->flags & CAN_CTRLMODE_TDC_MASK;

                is_can_fd = cm->flags & cm->mask & CAN_CTRLMODE_FD;

                /* CAN_CTRLMODE_TDC_{AUTO,MANUAL} are mutually exclusive */
                if (tdc_flags == CAN_CTRLMODE_TDC_MASK)
                        return -EOPNOTSUPP;
                /* If one of the CAN_CTRLMODE_TDC_* flag is set then
                 * TDC must be set and vice-versa
                 */
                if (!!tdc_flags != !!data[IFLA_CAN_TDC])
                        return -EOPNOTSUPP;
                /* If providing TDC parameters, at least TDCO is
                 * needed. TDCV is needed if and only if
                 * CAN_CTRLMODE_TDC_MANUAL is set
                 */
                if (data[IFLA_CAN_TDC]) {
                        struct nlattr *tb_tdc[IFLA_CAN_TDC_MAX + 1];

                        err = nla_parse_nested(tb_tdc, IFLA_CAN_TDC_MAX,
                                               data[IFLA_CAN_TDC],
                                               can_tdc_policy, extack);
                        if (err)
                                return err;

                        if (tb_tdc[IFLA_CAN_TDC_TDCV]) {
                                if (tdc_flags & CAN_CTRLMODE_TDC_AUTO)
                                        return -EOPNOTSUPP;
                        } else {
                                if (tdc_flags & CAN_CTRLMODE_TDC_MANUAL)
                                        return -EOPNOTSUPP;
                        }

                        if (!tb_tdc[IFLA_CAN_TDC_TDCO])
                                return -EOPNOTSUPP;
                }
        }

        if (is_can_fd) {
                if (!data[IFLA_CAN_BITTIMING] || !data[IFLA_CAN_DATA_BITTIMING])
                        return -EOPNOTSUPP;
        }

        if (data[IFLA_CAN_DATA_BITTIMING] || data[IFLA_CAN_TDC]) {
                if (!is_can_fd)
                        return -EOPNOTSUPP;
        }

        if (data[IFLA_CAN_DATA_BITTIMING]) {
                struct can_bittiming bt;

                memcpy(&bt, nla_data(data[IFLA_CAN_DATA_BITTIMING]), sizeof(bt));
                err = can_validate_bittiming(&bt, extack);
                if (err)
                        return err;
        }

        return 0;
}

static int can_tdc_changelink(struct can_priv *priv, const struct nlattr *nla,
                              struct netlink_ext_ack *extack)
{
        struct nlattr *tb_tdc[IFLA_CAN_TDC_MAX + 1];
        struct can_tdc tdc = { 0 };
        const struct can_tdc_const *tdc_const = priv->tdc_const;
        int err;

        if (!tdc_const || !can_tdc_is_enabled(priv))
                return -EOPNOTSUPP;

        err = nla_parse_nested(tb_tdc, IFLA_CAN_TDC_MAX, nla,
                               can_tdc_policy, extack);
        if (err)
                return err;

        if (tb_tdc[IFLA_CAN_TDC_TDCV]) {
                u32 tdcv = nla_get_u32(tb_tdc[IFLA_CAN_TDC_TDCV]);

                if (tdcv < tdc_const->tdcv_min || tdcv > tdc_const->tdcv_max)
                        return -EINVAL;

                tdc.tdcv = tdcv;
        }

        if (tb_tdc[IFLA_CAN_TDC_TDCO]) {
                u32 tdco = nla_get_u32(tb_tdc[IFLA_CAN_TDC_TDCO]);

                if (tdco < tdc_const->tdco_min || tdco > tdc_const->tdco_max)
                        return -EINVAL;

                tdc.tdco = tdco;
        }

        if (tb_tdc[IFLA_CAN_TDC_TDCF]) {
                u32 tdcf = nla_get_u32(tb_tdc[IFLA_CAN_TDC_TDCF]);

                if (tdcf < tdc_const->tdcf_min || tdcf > tdc_const->tdcf_max)
                        return -EINVAL;

                tdc.tdcf = tdcf;
        }

        priv->tdc = tdc;

        return 0;
}

static int can_changelink(struct net_device *dev, struct nlattr *tb[],
                          struct nlattr *data[],
                          struct netlink_ext_ack *extack)
{
        struct can_priv *priv = netdev_priv(dev);
        u32 tdc_mask = 0;
        int err;

        /* We need synchronization with dev->stop() */
        ASSERT_RTNL();

        if (data[IFLA_CAN_BITTIMING]) {
                struct can_bittiming bt;

                /* Do not allow changing bittiming while running */
                if (dev->flags & IFF_UP)
                        return -EBUSY;

                /* Calculate bittiming parameters based on
                 * bittiming_const if set, otherwise pass bitrate
                 * directly via do_set_bitrate(). Bail out if neither
                 * is given.
                 */
                if (!priv->bittiming_const && !priv->do_set_bittiming &&
                    !priv->bitrate_const)
                        return -EOPNOTSUPP;

                memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
                err = can_get_bittiming(dev, &bt,
                                        priv->bittiming_const,
                                        priv->bitrate_const,
                                        priv->bitrate_const_cnt,
                                        extack);
                if (err)
                        return err;

                if (priv->bitrate_max && bt.bitrate > priv->bitrate_max) {
                        NL_SET_ERR_MSG_FMT(extack,
                                           "arbitration bitrate %u bps surpasses transceiver capabilities of %u bps",
                                           bt.bitrate, priv->bitrate_max);
                        return -EINVAL;
                }

                memcpy(&priv->bittiming, &bt, sizeof(bt));

                if (priv->do_set_bittiming) {
                        /* Finally, set the bit-timing registers */
                        err = priv->do_set_bittiming(dev);
                        if (err)
                                return err;
                }
        }

        if (data[IFLA_CAN_CTRLMODE]) {
                struct can_ctrlmode *cm;
                u32 ctrlstatic;
                u32 maskedflags;

                /* Do not allow changing controller mode while running */
                if (dev->flags & IFF_UP)
                        return -EBUSY;
                cm = nla_data(data[IFLA_CAN_CTRLMODE]);
                ctrlstatic = can_get_static_ctrlmode(priv);
                maskedflags = cm->flags & cm->mask;

                /* check whether provided bits are allowed to be passed */
                if (maskedflags & ~(priv->ctrlmode_supported | ctrlstatic))
                        return -EOPNOTSUPP;

                /* do not check for static fd-non-iso if 'fd' is disabled */
                if (!(maskedflags & CAN_CTRLMODE_FD))
                        ctrlstatic &= ~CAN_CTRLMODE_FD_NON_ISO;

                /* make sure static options are provided by configuration */
                if ((maskedflags & ctrlstatic) != ctrlstatic)
                        return -EOPNOTSUPP;

                /* clear bits to be modified and copy the flag values */
                priv->ctrlmode &= ~cm->mask;
                priv->ctrlmode |= maskedflags;

                /* CAN_CTRLMODE_FD can only be set when driver supports FD */
                if (priv->ctrlmode & CAN_CTRLMODE_FD) {
                        dev->mtu = CANFD_MTU;
                } else {
                        dev->mtu = CAN_MTU;
                        memset(&priv->data_bittiming, 0,
                               sizeof(priv->data_bittiming));
                        priv->ctrlmode &= ~CAN_CTRLMODE_TDC_MASK;
                        memset(&priv->tdc, 0, sizeof(priv->tdc));
                }

                tdc_mask = cm->mask & CAN_CTRLMODE_TDC_MASK;
                /* CAN_CTRLMODE_TDC_{AUTO,MANUAL} are mutually
                 * exclusive: make sure to turn the other one off
                 */
                if (tdc_mask)
                        priv->ctrlmode &= cm->flags | ~CAN_CTRLMODE_TDC_MASK;
        }

        if (data[IFLA_CAN_RESTART_MS]) {
                /* Do not allow changing restart delay while running */
                if (dev->flags & IFF_UP)
                        return -EBUSY;
                priv->restart_ms = nla_get_u32(data[IFLA_CAN_RESTART_MS]);
        }

        if (data[IFLA_CAN_RESTART]) {
                /* Do not allow a restart while not running */
                if (!(dev->flags & IFF_UP))
                        return -EINVAL;
                err = can_restart_now(dev);
                if (err)
                        return err;
        }

        if (data[IFLA_CAN_DATA_BITTIMING]) {
                struct can_bittiming dbt;

                /* Do not allow changing bittiming while running */
                if (dev->flags & IFF_UP)
                        return -EBUSY;

                /* Calculate bittiming parameters based on
                 * data_bittiming_const if set, otherwise pass bitrate
                 * directly via do_set_bitrate(). Bail out if neither
                 * is given.
                 */
                if (!priv->data_bittiming_const && !priv->do_set_data_bittiming &&
                    !priv->data_bitrate_const)
                        return -EOPNOTSUPP;

                memcpy(&dbt, nla_data(data[IFLA_CAN_DATA_BITTIMING]),
                       sizeof(dbt));
                err = can_get_bittiming(dev, &dbt,
                                        priv->data_bittiming_const,
                                        priv->data_bitrate_const,
                                        priv->data_bitrate_const_cnt,
                                        extack);
                if (err)
                        return err;

                if (priv->bitrate_max && dbt.bitrate > priv->bitrate_max) {
                        NL_SET_ERR_MSG_FMT(extack,
                                           "CANFD data bitrate %u bps surpasses transceiver capabilities of %u bps",
                                           dbt.bitrate, priv->bitrate_max);
                        return -EINVAL;
                }

                memset(&priv->tdc, 0, sizeof(priv->tdc));
                if (data[IFLA_CAN_TDC]) {
                        /* TDC parameters are provided: use them */
                        err = can_tdc_changelink(priv, data[IFLA_CAN_TDC],
                                                 extack);
                        if (err) {
                                priv->ctrlmode &= ~CAN_CTRLMODE_TDC_MASK;
                                return err;
                        }
                } else if (!tdc_mask) {
                        /* Neither of TDC parameters nor TDC flags are
                         * provided: do calculation
                         */
                        can_calc_tdco(&priv->tdc, priv->tdc_const, &dbt,
                                      &priv->ctrlmode, priv->ctrlmode_supported);
                } /* else: both CAN_CTRLMODE_TDC_{AUTO,MANUAL} are explicitly
                   * turned off. TDC is disabled: do nothing
                   */

                memcpy(&priv->data_bittiming, &dbt, sizeof(dbt));

                if (priv->do_set_data_bittiming) {
                        /* Finally, set the bit-timing registers */
                        err = priv->do_set_data_bittiming(dev);
                        if (err)
                                return err;
                }
        }

        if (data[IFLA_CAN_TERMINATION]) {
                const u16 termval = nla_get_u16(data[IFLA_CAN_TERMINATION]);
                const unsigned int num_term = priv->termination_const_cnt;
                unsigned int i;

                if (!priv->do_set_termination)
                        return -EOPNOTSUPP;

                /* check whether given value is supported by the interface */
                for (i = 0; i < num_term; i++) {
                        if (termval == priv->termination_const[i])
                                break;
                }
                if (i >= num_term)
                        return -EINVAL;

                /* Finally, set the termination value */
                err = priv->do_set_termination(dev, termval);
                if (err)
                        return err;

                priv->termination = termval;
        }

        return 0;
}

static size_t can_tdc_get_size(const struct net_device *dev)
{
        struct can_priv *priv = netdev_priv(dev);
        size_t size;

        if (!priv->tdc_const)
                return 0;

        size = nla_total_size(0);                        /* nest IFLA_CAN_TDC */
        if (priv->ctrlmode_supported & CAN_CTRLMODE_TDC_MANUAL) {
                size += nla_total_size(sizeof(u32));        /* IFLA_CAN_TDCV_MIN */
                size += nla_total_size(sizeof(u32));        /* IFLA_CAN_TDCV_MAX */
        }
        size += nla_total_size(sizeof(u32));                /* IFLA_CAN_TDCO_MIN */
        size += nla_total_size(sizeof(u32));                /* IFLA_CAN_TDCO_MAX */
        if (priv->tdc_const->tdcf_max) {
                size += nla_total_size(sizeof(u32));        /* IFLA_CAN_TDCF_MIN */
                size += nla_total_size(sizeof(u32));        /* IFLA_CAN_TDCF_MAX */
        }

        if (can_tdc_is_enabled(priv)) {
                if (priv->ctrlmode & CAN_CTRLMODE_TDC_MANUAL ||
                    priv->do_get_auto_tdcv)
                        size += nla_total_size(sizeof(u32));        /* IFLA_CAN_TDCV */
                size += nla_total_size(sizeof(u32));                /* IFLA_CAN_TDCO */
                if (priv->tdc_const->tdcf_max)
                        size += nla_total_size(sizeof(u32));        /* IFLA_CAN_TDCF */
        }

        return size;
}

static size_t can_ctrlmode_ext_get_size(void)
{
        return nla_total_size(0) +                /* nest IFLA_CAN_CTRLMODE_EXT */
                nla_total_size(sizeof(u32));        /* IFLA_CAN_CTRLMODE_SUPPORTED */
}

static size_t can_get_size(const struct net_device *dev)
{
        struct can_priv *priv = netdev_priv(dev);
        size_t size = 0;

        if (priv->bittiming.bitrate)                                /* IFLA_CAN_BITTIMING */
                size += nla_total_size(sizeof(struct can_bittiming));
        if (priv->bittiming_const)                                /* IFLA_CAN_BITTIMING_CONST */
                size += nla_total_size(sizeof(struct can_bittiming_const));
        size += nla_total_size(sizeof(struct can_clock));        /* IFLA_CAN_CLOCK */
        size += nla_total_size(sizeof(u32));                        /* IFLA_CAN_STATE */
        size += nla_total_size(sizeof(struct can_ctrlmode));        /* IFLA_CAN_CTRLMODE */
        size += nla_total_size(sizeof(u32));                        /* IFLA_CAN_RESTART_MS */
        if (priv->do_get_berr_counter)                                /* IFLA_CAN_BERR_COUNTER */
                size += nla_total_size(sizeof(struct can_berr_counter));
        if (priv->data_bittiming.bitrate)                        /* IFLA_CAN_DATA_BITTIMING */
                size += nla_total_size(sizeof(struct can_bittiming));
        if (priv->data_bittiming_const)                                /* IFLA_CAN_DATA_BITTIMING_CONST */
                size += nla_total_size(sizeof(struct can_bittiming_const));
        if (priv->termination_const) {
                size += nla_total_size(sizeof(priv->termination));                /* IFLA_CAN_TERMINATION */
                size += nla_total_size(sizeof(*priv->termination_const) *        /* IFLA_CAN_TERMINATION_CONST */
                                       priv->termination_const_cnt);
        }
        if (priv->bitrate_const)                                /* IFLA_CAN_BITRATE_CONST */
                size += nla_total_size(sizeof(*priv->bitrate_const) *
                                       priv->bitrate_const_cnt);
        if (priv->data_bitrate_const)                                /* IFLA_CAN_DATA_BITRATE_CONST */
                size += nla_total_size(sizeof(*priv->data_bitrate_const) *
                                       priv->data_bitrate_const_cnt);
        size += sizeof(priv->bitrate_max);                        /* IFLA_CAN_BITRATE_MAX */
        size += can_tdc_get_size(dev);                                /* IFLA_CAN_TDC */
        size += can_ctrlmode_ext_get_size();                        /* IFLA_CAN_CTRLMODE_EXT */

        return size;
}

static int can_tdc_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
        struct nlattr *nest;
        struct can_priv *priv = netdev_priv(dev);
        struct can_tdc *tdc = &priv->tdc;
        const struct can_tdc_const *tdc_const = priv->tdc_const;

        if (!tdc_const)
                return 0;

        nest = nla_nest_start(skb, IFLA_CAN_TDC);
        if (!nest)
                return -EMSGSIZE;

        if (priv->ctrlmode_supported & CAN_CTRLMODE_TDC_MANUAL &&
            (nla_put_u32(skb, IFLA_CAN_TDC_TDCV_MIN, tdc_const->tdcv_min) ||
             nla_put_u32(skb, IFLA_CAN_TDC_TDCV_MAX, tdc_const->tdcv_max)))
                goto err_cancel;
        if (nla_put_u32(skb, IFLA_CAN_TDC_TDCO_MIN, tdc_const->tdco_min) ||
            nla_put_u32(skb, IFLA_CAN_TDC_TDCO_MAX, tdc_const->tdco_max))
                goto err_cancel;
        if (tdc_const->tdcf_max &&
            (nla_put_u32(skb, IFLA_CAN_TDC_TDCF_MIN, tdc_const->tdcf_min) ||
             nla_put_u32(skb, IFLA_CAN_TDC_TDCF_MAX, tdc_const->tdcf_max)))
                goto err_cancel;

        if (can_tdc_is_enabled(priv)) {
                u32 tdcv;
                int err = -EINVAL;

                if (priv->ctrlmode & CAN_CTRLMODE_TDC_MANUAL) {
                        tdcv = tdc->tdcv;
                        err = 0;
                } else if (priv->do_get_auto_tdcv) {
                        err = priv->do_get_auto_tdcv(dev, &tdcv);
                }
                if (!err && nla_put_u32(skb, IFLA_CAN_TDC_TDCV, tdcv))
                        goto err_cancel;
                if (nla_put_u32(skb, IFLA_CAN_TDC_TDCO, tdc->tdco))
                        goto err_cancel;
                if (tdc_const->tdcf_max &&
                    nla_put_u32(skb, IFLA_CAN_TDC_TDCF, tdc->tdcf))
                        goto err_cancel;
        }

        nla_nest_end(skb, nest);
        return 0;

err_cancel:
        nla_nest_cancel(skb, nest);
        return -EMSGSIZE;
}

static int can_ctrlmode_ext_fill_info(struct sk_buff *skb,
                                      const struct can_priv *priv)
{
        struct nlattr *nest;

        nest = nla_nest_start(skb, IFLA_CAN_CTRLMODE_EXT);
        if (!nest)
                return -EMSGSIZE;

        if (nla_put_u32(skb, IFLA_CAN_CTRLMODE_SUPPORTED,
                        priv->ctrlmode_supported)) {
                nla_nest_cancel(skb, nest);
                return -EMSGSIZE;
        }

        nla_nest_end(skb, nest);
        return 0;
}

static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
{
        struct can_priv *priv = netdev_priv(dev);
        struct can_ctrlmode cm = {.flags = priv->ctrlmode};
        struct can_berr_counter bec = { };
        enum can_state state = priv->state;

        if (priv->do_get_state)
                priv->do_get_state(dev, &state);

        if ((priv->bittiming.bitrate != CAN_BITRATE_UNSET &&
             priv->bittiming.bitrate != CAN_BITRATE_UNKNOWN &&
             nla_put(skb, IFLA_CAN_BITTIMING,
                     sizeof(priv->bittiming), &priv->bittiming)) ||

            (priv->bittiming_const &&
             nla_put(skb, IFLA_CAN_BITTIMING_CONST,
                     sizeof(*priv->bittiming_const), priv->bittiming_const)) ||

            nla_put(skb, IFLA_CAN_CLOCK, sizeof(priv->clock), &priv->clock) ||
            nla_put_u32(skb, IFLA_CAN_STATE, state) ||
            nla_put(skb, IFLA_CAN_CTRLMODE, sizeof(cm), &cm) ||
            nla_put_u32(skb, IFLA_CAN_RESTART_MS, priv->restart_ms) ||

            (priv->do_get_berr_counter &&
             !priv->do_get_berr_counter(dev, &bec) &&
             nla_put(skb, IFLA_CAN_BERR_COUNTER, sizeof(bec), &bec)) ||

            (priv->data_bittiming.bitrate &&
             nla_put(skb, IFLA_CAN_DATA_BITTIMING,
                     sizeof(priv->data_bittiming), &priv->data_bittiming)) ||

            (priv->data_bittiming_const &&
             nla_put(skb, IFLA_CAN_DATA_BITTIMING_CONST,
                     sizeof(*priv->data_bittiming_const),
                     priv->data_bittiming_const)) ||

            (priv->termination_const &&
             (nla_put_u16(skb, IFLA_CAN_TERMINATION, priv->termination) ||
              nla_put(skb, IFLA_CAN_TERMINATION_CONST,
                      sizeof(*priv->termination_const) *
                      priv->termination_const_cnt,
                      priv->termination_const))) ||

            (priv->bitrate_const &&
             nla_put(skb, IFLA_CAN_BITRATE_CONST,
                     sizeof(*priv->bitrate_const) *
                     priv->bitrate_const_cnt,
                     priv->bitrate_const)) ||

            (priv->data_bitrate_const &&
             nla_put(skb, IFLA_CAN_DATA_BITRATE_CONST,
                     sizeof(*priv->data_bitrate_const) *
                     priv->data_bitrate_const_cnt,
                     priv->data_bitrate_const)) ||

            (nla_put(skb, IFLA_CAN_BITRATE_MAX,
                     sizeof(priv->bitrate_max),
                     &priv->bitrate_max)) ||

            can_tdc_fill_info(skb, dev) ||

            can_ctrlmode_ext_fill_info(skb, priv)
            )

                return -EMSGSIZE;

        return 0;
}

static size_t can_get_xstats_size(const struct net_device *dev)
{
        return sizeof(struct can_device_stats);
}

static int can_fill_xstats(struct sk_buff *skb, const struct net_device *dev)
{
        struct can_priv *priv = netdev_priv(dev);

        if (nla_put(skb, IFLA_INFO_XSTATS,
                    sizeof(priv->can_stats), &priv->can_stats))
                goto nla_put_failure;
        return 0;

nla_put_failure:
        return -EMSGSIZE;
}

static int can_newlink(struct net *src_net, struct net_device *dev,
                       struct nlattr *tb[], struct nlattr *data[],
                       struct netlink_ext_ack *extack)
{
        return -EOPNOTSUPP;
}

static void can_dellink(struct net_device *dev, struct list_head *head)
{
}

struct rtnl_link_ops can_link_ops __read_mostly = {
        .kind                = "can",
        .netns_refund        = true,
        .maxtype        = IFLA_CAN_MAX,
        .policy                = can_policy,
        .setup                = can_setup,
        .validate        = can_validate,
        .newlink        = can_newlink,
        .changelink        = can_changelink,
        .dellink        = can_dellink,
        .get_size        = can_get_size,
        .fill_info        = can_fill_info,
        .get_xstats_size = can_get_xstats_size,
        .fill_xstats        = can_fill_xstats,
};

int can_netlink_register(void)
{
        return rtnl_link_register(&can_link_ops);
}

void can_netlink_unregister(void)
{
        rtnl_link_unregister(&can_link_ops);
}
































































































































































































































   32 

   84 

   19 




















































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef __SOUND_CONTROL_H
#define __SOUND_CONTROL_H

/*
 *  Header file for control interface
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 */

#include <linux/wait.h>
#include <linux/nospec.h>
#include <sound/asound.h>

#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)

struct snd_kcontrol;
typedef int (snd_kcontrol_info_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_info * uinfo);
typedef int (snd_kcontrol_get_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
typedef int (snd_kcontrol_put_t) (struct snd_kcontrol * kcontrol, struct snd_ctl_elem_value * ucontrol);
typedef int (snd_kcontrol_tlv_rw_t)(struct snd_kcontrol *kcontrol,
                                    int op_flag, /* SNDRV_CTL_TLV_OP_XXX */
                                    unsigned int size,
                                    unsigned int __user *tlv);

/* internal flag for skipping validations */
#ifdef CONFIG_SND_CTL_DEBUG
#define SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK        (1 << 24)
#define snd_ctl_skip_validation(info) \
        ((info)->access & SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK)
#else
#define SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK        0
#define snd_ctl_skip_validation(info)                true
#endif

/* kernel only - LED bits */
#define SNDRV_CTL_ELEM_ACCESS_LED_SHIFT                25
#define SNDRV_CTL_ELEM_ACCESS_LED_MASK                (7<<25) /* kernel three bits - LED group */
#define SNDRV_CTL_ELEM_ACCESS_SPK_LED                (1<<25) /* kernel speaker (output) LED flag */
#define SNDRV_CTL_ELEM_ACCESS_MIC_LED                (2<<25) /* kernel microphone (input) LED flag */

enum {
        SNDRV_CTL_TLV_OP_READ = 0,
        SNDRV_CTL_TLV_OP_WRITE = 1,
        SNDRV_CTL_TLV_OP_CMD = -1,
};

struct snd_kcontrol_new {
        snd_ctl_elem_iface_t iface;        /* interface identifier */
        unsigned int device;                /* device/client number */
        unsigned int subdevice;                /* subdevice (substream) number */
        const char *name;                /* ASCII name of item */
        unsigned int index;                /* index of item */
        unsigned int access;                /* access rights */
        unsigned int count;                /* count of same elements */
        snd_kcontrol_info_t *info;
        snd_kcontrol_get_t *get;
        snd_kcontrol_put_t *put;
        union {
                snd_kcontrol_tlv_rw_t *c;
                const unsigned int *p;
        } tlv;
        unsigned long private_value;
};

struct snd_kcontrol_volatile {
        struct snd_ctl_file *owner;        /* locked */
        unsigned int access;        /* access rights */
};

struct snd_kcontrol {
        struct list_head list;                /* list of controls */
        struct snd_ctl_elem_id id;
        unsigned int count;                /* count of same elements */
        snd_kcontrol_info_t *info;
        snd_kcontrol_get_t *get;
        snd_kcontrol_put_t *put;
        union {
                snd_kcontrol_tlv_rw_t *c;
                const unsigned int *p;
        } tlv;
        unsigned long private_value;
        void *private_data;
        void (*private_free)(struct snd_kcontrol *kcontrol);
        struct snd_kcontrol_volatile vd[];        /* volatile data */
};

#define snd_kcontrol(n) list_entry(n, struct snd_kcontrol, list)

struct snd_kctl_event {
        struct list_head list;        /* list of events */
        struct snd_ctl_elem_id id;
        unsigned int mask;
};

#define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)

struct pid;

enum {
        SND_CTL_SUBDEV_PCM,
        SND_CTL_SUBDEV_RAWMIDI,
        SND_CTL_SUBDEV_ITEMS,
};

struct snd_ctl_file {
        struct list_head list;                /* list of all control files */
        struct snd_card *card;
        struct pid *pid;
        int preferred_subdevice[SND_CTL_SUBDEV_ITEMS];
        wait_queue_head_t change_sleep;
        spinlock_t read_lock;
        struct snd_fasync *fasync;
        int subscribed;                        /* read interface is activated */
        struct list_head events;        /* waiting events for read */
};

struct snd_ctl_layer_ops {
        struct snd_ctl_layer_ops *next;
        const char *module_name;
        void (*lregister)(struct snd_card *card);
        void (*ldisconnect)(struct snd_card *card);
        void (*lnotify)(struct snd_card *card, unsigned int mask, struct snd_kcontrol *kctl, unsigned int ioff);
};

#define snd_ctl_file(n) list_entry(n, struct snd_ctl_file, list)

typedef int (*snd_kctl_ioctl_func_t) (struct snd_card * card,
                                      struct snd_ctl_file * control,
                                      unsigned int cmd, unsigned long arg);

void snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);
void snd_ctl_notify_one(struct snd_card * card, unsigned int mask, struct snd_kcontrol * kctl, unsigned int ioff);

struct snd_kcontrol *snd_ctl_new1(const struct snd_kcontrol_new * kcontrolnew, void * private_data);
void snd_ctl_free_one(struct snd_kcontrol * kcontrol);
int snd_ctl_add(struct snd_card * card, struct snd_kcontrol * kcontrol);
int snd_ctl_remove(struct snd_card * card, struct snd_kcontrol * kcontrol);
int snd_ctl_replace(struct snd_card *card, struct snd_kcontrol *kcontrol, bool add_on_replace);
int snd_ctl_remove_id(struct snd_card * card, struct snd_ctl_elem_id *id);
int snd_ctl_rename_id(struct snd_card * card, struct snd_ctl_elem_id *src_id, struct snd_ctl_elem_id *dst_id);
void snd_ctl_rename(struct snd_card *card, struct snd_kcontrol *kctl, const char *name);
int snd_ctl_activate_id(struct snd_card *card, struct snd_ctl_elem_id *id, int active);
struct snd_kcontrol *snd_ctl_find_numid_locked(struct snd_card *card, unsigned int numid);
struct snd_kcontrol *snd_ctl_find_numid(struct snd_card *card, unsigned int numid);
struct snd_kcontrol *snd_ctl_find_id_locked(struct snd_card *card, const struct snd_ctl_elem_id *id);
struct snd_kcontrol *snd_ctl_find_id(struct snd_card *card, const struct snd_ctl_elem_id *id);

/**
 * snd_ctl_find_id_mixer - find the control instance with the given name string
 * @card: the card instance
 * @name: the name string
 *
 * Finds the control instance with the given name and
 * @SNDRV_CTL_ELEM_IFACE_MIXER. Other fields are set to zero.
 *
 * This is merely a wrapper to snd_ctl_find_id().
 *
 * Return: The pointer of the instance if found, or %NULL if not.
 */
static inline struct snd_kcontrol *
snd_ctl_find_id_mixer(struct snd_card *card, const char *name)
{
        struct snd_ctl_elem_id id = {};

        id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
        strscpy(id.name, name, sizeof(id.name));
        return snd_ctl_find_id(card, &id);
}

/**
 * snd_ctl_find_id_mixer_locked - find the control instance with the given name string
 * @card: the card instance
 * @name: the name string
 *
 * Finds the control instance with the given name and
 * @SNDRV_CTL_ELEM_IFACE_MIXER. Other fields are set to zero.
 *
 * This is merely a wrapper to snd_ctl_find_id_locked().
 * The caller must down card->controls_rwsem before calling this function.
 *
 * Return: The pointer of the instance if found, or %NULL if not.
 */
static inline struct snd_kcontrol *
snd_ctl_find_id_mixer_locked(struct snd_card *card, const char *name)
{
        struct snd_ctl_elem_id id = {};

        id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
        strscpy(id.name, name, sizeof(id.name));
        return snd_ctl_find_id_locked(card, &id);
}

int snd_ctl_create(struct snd_card *card);

int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
#ifdef CONFIG_COMPAT
int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
#else
#define snd_ctl_register_ioctl_compat(fcn)
#define snd_ctl_unregister_ioctl_compat(fcn)
#endif

int snd_ctl_request_layer(const char *module_name);
void snd_ctl_register_layer(struct snd_ctl_layer_ops *lops);
void snd_ctl_disconnect_layer(struct snd_ctl_layer_ops *lops);

int snd_ctl_get_preferred_subdevice(struct snd_card *card, int type);

static inline unsigned int snd_ctl_get_ioffnum(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
{
        unsigned int ioff = id->numid - kctl->id.numid;
        return array_index_nospec(ioff, kctl->count);
}

static inline unsigned int snd_ctl_get_ioffidx(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
{
        unsigned int ioff = id->index - kctl->id.index;
        return array_index_nospec(ioff, kctl->count);
}

static inline unsigned int snd_ctl_get_ioff(struct snd_kcontrol *kctl, struct snd_ctl_elem_id *id)
{
        if (id->numid) {
                return snd_ctl_get_ioffnum(kctl, id);
        } else {
                return snd_ctl_get_ioffidx(kctl, id);
        }
}

static inline struct snd_ctl_elem_id *snd_ctl_build_ioff(struct snd_ctl_elem_id *dst_id,
                                                    struct snd_kcontrol *src_kctl,
                                                    unsigned int offset)
{
        *dst_id = src_kctl->id;
        dst_id->index += offset;
        dst_id->numid += offset;
        return dst_id;
}

/*
 * Frequently used control callbacks/helpers
 */
int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_info *uinfo);
int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
                                struct snd_ctl_elem_info *uinfo);
int snd_ctl_enum_info(struct snd_ctl_elem_info *info, unsigned int channels,
                      unsigned int items, const char *const names[]);

/*
 * virtual master control
 */
struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
                                                 const unsigned int *tlv);
int _snd_ctl_add_follower(struct snd_kcontrol *master,
                          struct snd_kcontrol *follower,
                          unsigned int flags);
/* optional flags for follower */
#define SND_CTL_FOLLOWER_NEED_UPDATE        (1 << 0)

/**
 * snd_ctl_add_follower - Add a virtual follower control
 * @master: vmaster element
 * @follower: follower element to add
 *
 * Add a virtual follower control to the given master element created via
 * snd_ctl_create_virtual_master() beforehand.
 *
 * All followers must be the same type (returning the same information
 * via info callback).  The function doesn't check it, so it's your
 * responsibility.
 *
 * Also, some additional limitations:
 * at most two channels,
 * logarithmic volume control (dB level) thus no linear volume,
 * master can only attenuate the volume without gain
 *
 * Return: Zero if successful or a negative error code.
 */
static inline int
snd_ctl_add_follower(struct snd_kcontrol *master, struct snd_kcontrol *follower)
{
        return _snd_ctl_add_follower(master, follower, 0);
}

int snd_ctl_add_followers(struct snd_card *card, struct snd_kcontrol *master,
                          const char * const *list);

/**
 * snd_ctl_add_follower_uncached - Add a virtual follower control
 * @master: vmaster element
 * @follower: follower element to add
 *
 * Add a virtual follower control to the given master.
 * Unlike snd_ctl_add_follower(), the element added via this function
 * is supposed to have volatile values, and get callback is called
 * at each time queried from the master.
 *
 * When the control peeks the hardware values directly and the value
 * can be changed by other means than the put callback of the element,
 * this function should be used to keep the value always up-to-date.
 *
 * Return: Zero if successful or a negative error code.
 */
static inline int
snd_ctl_add_follower_uncached(struct snd_kcontrol *master,
                              struct snd_kcontrol *follower)
{
        return _snd_ctl_add_follower(master, follower, SND_CTL_FOLLOWER_NEED_UPDATE);
}

int snd_ctl_add_vmaster_hook(struct snd_kcontrol *kctl,
                             void (*hook)(void *private_data, int),
                             void *private_data);
void snd_ctl_sync_vmaster(struct snd_kcontrol *kctl, bool hook_only);
#define snd_ctl_sync_vmaster_hook(kctl)        snd_ctl_sync_vmaster(kctl, true)
int snd_ctl_apply_vmaster_followers(struct snd_kcontrol *kctl,
                                    int (*func)(struct snd_kcontrol *vfollower,
                                                struct snd_kcontrol *follower,
                                                void *arg),
                                    void *arg);

/*
 * Control LED trigger layer
 */
#define SND_CTL_LAYER_MODULE_LED        "snd-ctl-led"

#if IS_MODULE(CONFIG_SND_CTL_LED)
static inline int snd_ctl_led_request(void) { return snd_ctl_request_layer(SND_CTL_LAYER_MODULE_LED); }
#else
static inline int snd_ctl_led_request(void) { return 0; }
#endif

/*
 * Helper functions for jack-detection controls
 */
struct snd_kcontrol *
snd_kctl_jack_new(const char *name, struct snd_card *card);
void snd_kctl_jack_report(struct snd_card *card,
                          struct snd_kcontrol *kctl, bool status);

#endif        /* __SOUND_CONTROL_H */

































 2720 

































































  757 







 2663 



   84 








  201 























































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * connection tracking event cache.
 */

#ifndef _NF_CONNTRACK_ECACHE_H
#define _NF_CONNTRACK_ECACHE_H
#include <net/netfilter/nf_conntrack.h>

#include <net/net_namespace.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_common.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <net/netfilter/nf_conntrack_extend.h>

enum nf_ct_ecache_state {
        NFCT_ECACHE_DESTROY_FAIL,        /* tried but failed to send destroy event */
        NFCT_ECACHE_DESTROY_SENT,        /* sent destroy event after failure */
};

struct nf_conntrack_ecache {
        unsigned long cache;                /* bitops want long */
        u16 ctmask;                        /* bitmask of ct events to be delivered */
        u16 expmask;                        /* bitmask of expect events to be delivered */
        u32 missed;                        /* missed events */
        u32 portid;                        /* netlink portid of destroyer */
};

static inline struct nf_conntrack_ecache *
nf_ct_ecache_find(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
        return nf_ct_ext_find(ct, NF_CT_EXT_ECACHE);
#else
        return NULL;
#endif
}

static inline bool nf_ct_ecache_exist(const struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
        return nf_ct_ext_exist(ct, NF_CT_EXT_ECACHE);
#else
        return false;
#endif
}

#ifdef CONFIG_NF_CONNTRACK_EVENTS

/* This structure is passed to event handler */
struct nf_ct_event {
        struct nf_conn *ct;
        u32 portid;
        int report;
};

struct nf_exp_event {
        struct nf_conntrack_expect *exp;
        u32 portid;
        int report;
};

struct nf_ct_event_notifier {
        int (*ct_event)(unsigned int events, const struct nf_ct_event *item);
        int (*exp_event)(unsigned int events, const struct nf_exp_event *item);
};

void nf_conntrack_register_notifier(struct net *net,
                                   const struct nf_ct_event_notifier *nb);
void nf_conntrack_unregister_notifier(struct net *net);

void nf_ct_deliver_cached_events(struct nf_conn *ct);
int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
                                  u32 portid, int report);

bool nf_ct_ecache_ext_add(struct nf_conn *ct, u16 ctmask, u16 expmask, gfp_t gfp);
#else

static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct)
{
}

static inline int nf_conntrack_eventmask_report(unsigned int eventmask,
                                                struct nf_conn *ct,
                                                u32 portid,
                                                int report)
{
        return 0;
}

static inline bool nf_ct_ecache_ext_add(struct nf_conn *ct, u16 ctmask, u16 expmask, gfp_t gfp)
{
        return false;
}
#endif

static inline void
nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
        struct net *net = nf_ct_net(ct);
        struct nf_conntrack_ecache *e;

        if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
                return;

        e = nf_ct_ecache_find(ct);
        if (e == NULL)
                return;

        set_bit(event, &e->cache);
#endif
}

static inline int
nf_conntrack_event_report(enum ip_conntrack_events event, struct nf_conn *ct,
                          u32 portid, int report)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
        if (nf_ct_ecache_exist(ct))
                return nf_conntrack_eventmask_report(1 << event, ct, portid, report);
#endif
        return 0;
}

static inline int
nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
        if (nf_ct_ecache_exist(ct))
                return nf_conntrack_eventmask_report(1 << event, ct, 0, 0);
#endif
        return 0;
}

#ifdef CONFIG_NF_CONNTRACK_EVENTS
void nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
                               struct nf_conntrack_expect *exp,
                               u32 portid, int report);

void nf_conntrack_ecache_work(struct net *net, enum nf_ct_ecache_state state);

void nf_conntrack_ecache_pernet_init(struct net *net);
void nf_conntrack_ecache_pernet_fini(struct net *net);

struct nf_conntrack_net_ecache *nf_conn_pernet_ecache(const struct net *net);

static inline bool nf_conntrack_ecache_dwork_pending(const struct net *net)
{
        return net->ct.ecache_dwork_pending;
}
#else /* CONFIG_NF_CONNTRACK_EVENTS */

static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
                                             struct nf_conntrack_expect *exp,
                                             u32 portid,
                                             int report)
{
}

static inline void nf_conntrack_ecache_work(struct net *net,
                                            enum nf_ct_ecache_state s)
{
}

static inline void nf_conntrack_ecache_pernet_init(struct net *net)
{
}

static inline void nf_conntrack_ecache_pernet_fini(struct net *net)
{
}
static inline bool nf_conntrack_ecache_dwork_pending(const struct net *net) { return false; }
#endif /* CONFIG_NF_CONNTRACK_EVENTS */
#endif /*_NF_CONNTRACK_ECACHE_H*/



































































   60 
   66 











1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
/* SPDX-License-Identifier: GPL-2.0-only */
/* Copyright (c) 2016 Facebook
 */
#ifndef __BPF_LRU_LIST_H_
#define __BPF_LRU_LIST_H_

#include <linux/cache.h>
#include <linux/list.h>
#include <linux/spinlock_types.h>

#define NR_BPF_LRU_LIST_T        (3)
#define NR_BPF_LRU_LIST_COUNT        (2)
#define NR_BPF_LRU_LOCAL_LIST_T (2)
#define BPF_LOCAL_LIST_T_OFFSET NR_BPF_LRU_LIST_T

enum bpf_lru_list_type {
        BPF_LRU_LIST_T_ACTIVE,
        BPF_LRU_LIST_T_INACTIVE,
        BPF_LRU_LIST_T_FREE,
        BPF_LRU_LOCAL_LIST_T_FREE,
        BPF_LRU_LOCAL_LIST_T_PENDING,
};

struct bpf_lru_node {
        struct list_head list;
        u16 cpu;
        u8 type;
        u8 ref;
};

struct bpf_lru_list {
        struct list_head lists[NR_BPF_LRU_LIST_T];
        unsigned int counts[NR_BPF_LRU_LIST_COUNT];
        /* The next inactive list rotation starts from here */
        struct list_head *next_inactive_rotation;

        raw_spinlock_t lock ____cacheline_aligned_in_smp;
};

struct bpf_lru_locallist {
        struct list_head lists[NR_BPF_LRU_LOCAL_LIST_T];
        u16 next_steal;
        raw_spinlock_t lock;
};

struct bpf_common_lru {
        struct bpf_lru_list lru_list;
        struct bpf_lru_locallist __percpu *local_list;
};

typedef bool (*del_from_htab_func)(void *arg, struct bpf_lru_node *node);

struct bpf_lru {
        union {
                struct bpf_common_lru common_lru;
                struct bpf_lru_list __percpu *percpu_lru;
        };
        del_from_htab_func del_from_htab;
        void *del_arg;
        unsigned int hash_offset;
        unsigned int nr_scans;
        bool percpu;
};

static inline void bpf_lru_node_set_ref(struct bpf_lru_node *node)
{
        if (!READ_ONCE(node->ref))
                WRITE_ONCE(node->ref, 1);
}

int bpf_lru_init(struct bpf_lru *lru, bool percpu, u32 hash_offset,
                 del_from_htab_func del_from_htab, void *delete_arg);
void bpf_lru_populate(struct bpf_lru *lru, void *buf, u32 node_offset,
                      u32 elem_size, u32 nr_elems);
void bpf_lru_destroy(struct bpf_lru *lru);
struct bpf_lru_node *bpf_lru_pop_free(struct bpf_lru *lru, u32 hash);
void bpf_lru_push_free(struct bpf_lru *lru, struct bpf_lru_node *node);

#endif















































   11 



































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PART_STAT_H
#define _LINUX_PART_STAT_H

#include <linux/blkdev.h>
#include <asm/local.h>

struct disk_stats {
        u64 nsecs[NR_STAT_GROUPS];
        unsigned long sectors[NR_STAT_GROUPS];
        unsigned long ios[NR_STAT_GROUPS];
        unsigned long merges[NR_STAT_GROUPS];
        unsigned long io_ticks;
        local_t in_flight[2];
};

/*
 * Macros to operate on percpu disk statistics:
 *
 * {disk|part|all}_stat_{add|sub|inc|dec}() modify the stat counters and should
 * be called between disk_stat_lock() and disk_stat_unlock().
 *
 * part_stat_read() can be called at any time.
 */
#define part_stat_lock()        preempt_disable()
#define part_stat_unlock()        preempt_enable()

#define part_stat_get_cpu(part, field, cpu)                                \
        (per_cpu_ptr((part)->bd_stats, (cpu))->field)

#define part_stat_get(part, field)                                        \
        part_stat_get_cpu(part, field, smp_processor_id())

#define part_stat_read(part, field)                                        \
({                                                                        \
        typeof((part)->bd_stats->field) res = 0;                        \
        unsigned int _cpu;                                                \
        for_each_possible_cpu(_cpu)                                        \
                res += per_cpu_ptr((part)->bd_stats, _cpu)->field; \
        res;                                                                \
})

static inline void part_stat_set_all(struct block_device *part, int value)
{
        int i;

        for_each_possible_cpu(i)
                memset(per_cpu_ptr(part->bd_stats, i), value,
                                sizeof(struct disk_stats));
}

#define part_stat_read_accum(part, field)                                \
        (part_stat_read(part, field[STAT_READ]) +                        \
         part_stat_read(part, field[STAT_WRITE]) +                        \
         part_stat_read(part, field[STAT_DISCARD]))

#define __part_stat_add(part, field, addnd)                                \
        __this_cpu_add((part)->bd_stats->field, addnd)

#define part_stat_add(part, field, addnd)        do {                        \
        __part_stat_add((part), field, addnd);                                \
        if (bdev_is_partition(part))                                        \
                __part_stat_add(bdev_whole(part), field, addnd);        \
} while (0)

#define part_stat_dec(part, field)                                        \
        part_stat_add(part, field, -1)
#define part_stat_inc(part, field)                                        \
        part_stat_add(part, field, 1)
#define part_stat_sub(part, field, subnd)                                \
        part_stat_add(part, field, -subnd)

#define part_stat_local_dec(part, field)                                \
        local_dec(&(part_stat_get(part, field)))
#define part_stat_local_inc(part, field)                                \
        local_inc(&(part_stat_get(part, field)))
#define part_stat_local_read(part, field)                                \
        local_read(&(part_stat_get(part, field)))
#define part_stat_local_read_cpu(part, field, cpu)                        \
        local_read(&(part_stat_get_cpu(part, field, cpu)))

#endif /* _LINUX_PART_STAT_H */













































    6 





    6 





    6 










    6 



    5 







    6 

    6 


    8 















    4 


    5 




    6 




    6 




    1 













    2 












    2 


    2 

    1 



    1 





1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/eventfd.h>
#include <linux/eventpoll.h>
#include <linux/io_uring.h>
#include <linux/io_uring_types.h>

#include "io-wq.h"
#include "eventfd.h"

struct io_ev_fd {
        struct eventfd_ctx        *cq_ev_fd;
        unsigned int                eventfd_async: 1;
        struct rcu_head                rcu;
        atomic_t                refs;
        atomic_t                ops;
};

enum {
        IO_EVENTFD_OP_SIGNAL_BIT,
};

static void io_eventfd_free(struct rcu_head *rcu)
{
        struct io_ev_fd *ev_fd = container_of(rcu, struct io_ev_fd, rcu);

        eventfd_ctx_put(ev_fd->cq_ev_fd);
        kfree(ev_fd);
}

static void io_eventfd_do_signal(struct rcu_head *rcu)
{
        struct io_ev_fd *ev_fd = container_of(rcu, struct io_ev_fd, rcu);

        eventfd_signal_mask(ev_fd->cq_ev_fd, EPOLL_URING_WAKE);

        if (atomic_dec_and_test(&ev_fd->refs))
                io_eventfd_free(rcu);
}

void io_eventfd_signal(struct io_ring_ctx *ctx)
{
        struct io_ev_fd *ev_fd = NULL;

        if (READ_ONCE(ctx->rings->cq_flags) & IORING_CQ_EVENTFD_DISABLED)
                return;

        guard(rcu)();

        /*
         * rcu_dereference ctx->io_ev_fd once and use it for both for checking
         * and eventfd_signal
         */
        ev_fd = rcu_dereference(ctx->io_ev_fd);

        /*
         * Check again if ev_fd exists incase an io_eventfd_unregister call
         * completed between the NULL check of ctx->io_ev_fd at the start of
         * the function and rcu_read_lock.
         */
        if (unlikely(!ev_fd))
                return;
        if (!atomic_inc_not_zero(&ev_fd->refs))
                return;
        if (ev_fd->eventfd_async && !io_wq_current_is_worker())
                goto out;

        if (likely(eventfd_signal_allowed())) {
                eventfd_signal_mask(ev_fd->cq_ev_fd, EPOLL_URING_WAKE);
        } else {
                if (!atomic_fetch_or(BIT(IO_EVENTFD_OP_SIGNAL_BIT), &ev_fd->ops)) {
                        call_rcu_hurry(&ev_fd->rcu, io_eventfd_do_signal);
                        return;
                }
        }
out:
        if (atomic_dec_and_test(&ev_fd->refs))
                call_rcu(&ev_fd->rcu, io_eventfd_free);
}

void io_eventfd_flush_signal(struct io_ring_ctx *ctx)
{
        bool skip;

        spin_lock(&ctx->completion_lock);

        /*
         * Eventfd should only get triggered when at least one event has been
         * posted. Some applications rely on the eventfd notification count
         * only changing IFF a new CQE has been added to the CQ ring. There's
         * no depedency on 1:1 relationship between how many times this
         * function is called (and hence the eventfd count) and number of CQEs
         * posted to the CQ ring.
         */
        skip = ctx->cached_cq_tail == ctx->evfd_last_cq_tail;
        ctx->evfd_last_cq_tail = ctx->cached_cq_tail;
        spin_unlock(&ctx->completion_lock);
        if (skip)
                return;

        io_eventfd_signal(ctx);
}

int io_eventfd_register(struct io_ring_ctx *ctx, void __user *arg,
                        unsigned int eventfd_async)
{
        struct io_ev_fd *ev_fd;
        __s32 __user *fds = arg;
        int fd;

        ev_fd = rcu_dereference_protected(ctx->io_ev_fd,
                                        lockdep_is_held(&ctx->uring_lock));
        if (ev_fd)
                return -EBUSY;

        if (copy_from_user(&fd, fds, sizeof(*fds)))
                return -EFAULT;

        ev_fd = kmalloc(sizeof(*ev_fd), GFP_KERNEL);
        if (!ev_fd)
                return -ENOMEM;

        ev_fd->cq_ev_fd = eventfd_ctx_fdget(fd);
        if (IS_ERR(ev_fd->cq_ev_fd)) {
                int ret = PTR_ERR(ev_fd->cq_ev_fd);
                kfree(ev_fd);
                return ret;
        }

        spin_lock(&ctx->completion_lock);
        ctx->evfd_last_cq_tail = ctx->cached_cq_tail;
        spin_unlock(&ctx->completion_lock);

        ev_fd->eventfd_async = eventfd_async;
        ctx->has_evfd = true;
        atomic_set(&ev_fd->refs, 1);
        atomic_set(&ev_fd->ops, 0);
        rcu_assign_pointer(ctx->io_ev_fd, ev_fd);
        return 0;
}

int io_eventfd_unregister(struct io_ring_ctx *ctx)
{
        struct io_ev_fd *ev_fd;

        ev_fd = rcu_dereference_protected(ctx->io_ev_fd,
                                        lockdep_is_held(&ctx->uring_lock));
        if (ev_fd) {
                ctx->has_evfd = false;
                rcu_assign_pointer(ctx->io_ev_fd, NULL);
                if (atomic_dec_and_test(&ev_fd->refs))
                        call_rcu(&ev_fd->rcu, io_eventfd_free);
                return 0;
        }

        return -ENXIO;
}































































  113 



  113 


















  257 



  257 





  251 


    9 





















   87 



   88 




















  276 







  277 









  276 





  275 














  257 


   88 











  277 






  124 











   95 
   49 






   70 
   91 









  265 















  263 


  263 





  265 











  265 
   14 






  262 
  109 






  264 
    1 






  265 





  265 
   14 















    2 




  106 


    1 


    3 


    2 



    6 



  110 


  110 



















  265 









  120 











  207 








  208 


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
/*
 *  linux/drivers/video/console/bitblit.c -- BitBlitting Operation
 *
 *  Originally from the 'accel_*' routines in drivers/video/console/fbcon.c
 *
 *      Copyright (C) 2004 Antonino Daplas <adaplas @pol.net>
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of this archive for
 *  more details.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <asm/types.h>
#include "fbcon.h"

/*
 * Accelerated handlers.
 */
static void update_attr(u8 *dst, u8 *src, int attribute,
                               struct vc_data *vc)
{
        int i, offset = (vc->vc_font.height < 10) ? 1 : 2;
        int width = DIV_ROUND_UP(vc->vc_font.width, 8);
        unsigned int cellsize = vc->vc_font.height * width;
        u8 c;

        offset = cellsize - (offset * width);
        for (i = 0; i < cellsize; i++) {
                c = src[i];
                if (attribute & FBCON_ATTRIBUTE_UNDERLINE && i >= offset)
                        c = 0xff;
                if (attribute & FBCON_ATTRIBUTE_BOLD)
                        c |= c >> 1;
                if (attribute & FBCON_ATTRIBUTE_REVERSE)
                        c = ~c;
                dst[i] = c;
        }
}

static void bit_bmove(struct vc_data *vc, struct fb_info *info, int sy,
                      int sx, int dy, int dx, int height, int width)
{
        struct fb_copyarea area;

        area.sx = sx * vc->vc_font.width;
        area.sy = sy * vc->vc_font.height;
        area.dx = dx * vc->vc_font.width;
        area.dy = dy * vc->vc_font.height;
        area.height = height * vc->vc_font.height;
        area.width = width * vc->vc_font.width;

        info->fbops->fb_copyarea(info, &area);
}

static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
                      int sx, int height, int width)
{
        int bgshift = (vc->vc_hi_font_mask) ? 13 : 12;
        struct fb_fillrect region;

        region.color = attr_bgcol_ec(bgshift, vc, info);
        region.dx = sx * vc->vc_font.width;
        region.dy = sy * vc->vc_font.height;
        region.width = width * vc->vc_font.width;
        region.height = height * vc->vc_font.height;
        region.rop = ROP_COPY;

        info->fbops->fb_fillrect(info, &region);
}

static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
                                     const u16 *s, u32 attr, u32 cnt,
                                     u32 d_pitch, u32 s_pitch, u32 cellsize,
                                     struct fb_image *image, u8 *buf, u8 *dst)
{
        u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
        u32 idx = vc->vc_font.width >> 3;
        u8 *src;

        while (cnt--) {
                src = vc->vc_font.data + (scr_readw(s++)&
                                          charmask)*cellsize;

                if (attr) {
                        update_attr(buf, src, attr, vc);
                        src = buf;
                }

                if (likely(idx == 1))
                        __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
                                                image->height);
                else
                        fb_pad_aligned_buffer(dst, d_pitch, src, idx,
                                              image->height);

                dst += s_pitch;
        }

        info->fbops->fb_imageblit(info, image);
}

static inline void bit_putcs_unaligned(struct vc_data *vc,
                                       struct fb_info *info, const u16 *s,
                                       u32 attr, u32 cnt, u32 d_pitch,
                                       u32 s_pitch, u32 cellsize,
                                       struct fb_image *image, u8 *buf,
                                       u8 *dst)
{
        u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
        u32 shift_low = 0, mod = vc->vc_font.width % 8;
        u32 shift_high = 8;
        u32 idx = vc->vc_font.width >> 3;
        u8 *src;

        while (cnt--) {
                src = vc->vc_font.data + (scr_readw(s++)&
                                          charmask)*cellsize;

                if (attr) {
                        update_attr(buf, src, attr, vc);
                        src = buf;
                }

                fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
                                        image->height, shift_high,
                                        shift_low, mod);
                shift_low += mod;
                dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
                shift_low &= 7;
                shift_high = 8 - shift_low;
        }

        info->fbops->fb_imageblit(info, image);

}

static void bit_putcs(struct vc_data *vc, struct fb_info *info,
                      const unsigned short *s, int count, int yy, int xx,
                      int fg, int bg)
{
        struct fb_image image;
        u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
        u32 cellsize = width * vc->vc_font.height;
        u32 maxcnt = info->pixmap.size/cellsize;
        u32 scan_align = info->pixmap.scan_align - 1;
        u32 buf_align = info->pixmap.buf_align - 1;
        u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
        u32 attribute = get_attribute(info, scr_readw(s));
        u8 *dst, *buf = NULL;

        image.fg_color = fg;
        image.bg_color = bg;
        image.dx = xx * vc->vc_font.width;
        image.dy = yy * vc->vc_font.height;
        image.height = vc->vc_font.height;
        image.depth = 1;

        if (attribute) {
                buf = kmalloc(cellsize, GFP_ATOMIC);
                if (!buf)
                        return;
        }

        while (count) {
                if (count > maxcnt)
                        cnt = maxcnt;
                else
                        cnt = count;

                image.width = vc->vc_font.width * cnt;
                pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
                pitch &= ~scan_align;
                size = pitch * image.height + buf_align;
                size &= ~buf_align;
                dst = fb_get_buffer_offset(info, &info->pixmap, size);
                image.data = dst;

                if (!mod)
                        bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
                                          width, cellsize, &image, buf, dst);
                else
                        bit_putcs_unaligned(vc, info, s, attribute, cnt,
                                            pitch, width, cellsize, &image,
                                            buf, dst);

                image.dx += cnt * vc->vc_font.width;
                count -= cnt;
                s += cnt;
        }

        /* buf is always NULL except when in monochrome mode, so in this case
           it's a gain to check buf against NULL even though kfree() handles
           NULL pointers just fine */
        if (unlikely(buf))
                kfree(buf);

}

static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
                              int color, int bottom_only)
{
        unsigned int cw = vc->vc_font.width;
        unsigned int ch = vc->vc_font.height;
        unsigned int rw = info->var.xres - (vc->vc_cols*cw);
        unsigned int bh = info->var.yres - (vc->vc_rows*ch);
        unsigned int rs = info->var.xres - rw;
        unsigned int bs = info->var.yres - bh;
        struct fb_fillrect region;

        region.color = color;
        region.rop = ROP_COPY;

        if ((int) rw > 0 && !bottom_only) {
                region.dx = info->var.xoffset + rs;
                region.dy = 0;
                region.width = rw;
                region.height = info->var.yres_virtual;
                info->fbops->fb_fillrect(info, &region);
        }

        if ((int) bh > 0) {
                region.dx = info->var.xoffset;
                region.dy = info->var.yoffset + bs;
                region.width = rs;
                region.height = bh;
                info->fbops->fb_fillrect(info, &region);
        }
}

static void bit_cursor(struct vc_data *vc, struct fb_info *info, bool enable,
                       int fg, int bg)
{
        struct fb_cursor cursor;
        struct fbcon_ops *ops = info->fbcon_par;
        unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
        int w = DIV_ROUND_UP(vc->vc_font.width, 8), c;
        int y = real_y(ops->p, vc->state.y);
        int attribute, use_sw = vc->vc_cursor_type & CUR_SW;
        int err = 1;
        char *src;

        cursor.set = 0;

        if (!vc->vc_font.data)
                return;

         c = scr_readw((u16 *) vc->vc_pos);
        attribute = get_attribute(info, c);
        src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));

        if (ops->cursor_state.image.data != src ||
            ops->cursor_reset) {
            ops->cursor_state.image.data = src;
            cursor.set |= FB_CUR_SETIMAGE;
        }

        if (attribute) {
                u8 *dst;

                dst = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
                if (!dst)
                        return;
                kfree(ops->cursor_data);
                ops->cursor_data = dst;
                update_attr(dst, src, attribute, vc);
                src = dst;
        }

        if (ops->cursor_state.image.fg_color != fg ||
            ops->cursor_state.image.bg_color != bg ||
            ops->cursor_reset) {
                ops->cursor_state.image.fg_color = fg;
                ops->cursor_state.image.bg_color = bg;
                cursor.set |= FB_CUR_SETCMAP;
        }

        if ((ops->cursor_state.image.dx != (vc->vc_font.width * vc->state.x)) ||
            (ops->cursor_state.image.dy != (vc->vc_font.height * y)) ||
            ops->cursor_reset) {
                ops->cursor_state.image.dx = vc->vc_font.width * vc->state.x;
                ops->cursor_state.image.dy = vc->vc_font.height * y;
                cursor.set |= FB_CUR_SETPOS;
        }

        if (ops->cursor_state.image.height != vc->vc_font.height ||
            ops->cursor_state.image.width != vc->vc_font.width ||
            ops->cursor_reset) {
                ops->cursor_state.image.height = vc->vc_font.height;
                ops->cursor_state.image.width = vc->vc_font.width;
                cursor.set |= FB_CUR_SETSIZE;
        }

        if (ops->cursor_state.hot.x || ops->cursor_state.hot.y ||
            ops->cursor_reset) {
                ops->cursor_state.hot.x = cursor.hot.y = 0;
                cursor.set |= FB_CUR_SETHOT;
        }

        if (cursor.set & FB_CUR_SETSIZE ||
            vc->vc_cursor_type != ops->p->cursor_shape ||
            ops->cursor_state.mask == NULL ||
            ops->cursor_reset) {
                char *mask = kmalloc_array(w, vc->vc_font.height, GFP_ATOMIC);
                int cur_height, size, i = 0;
                u8 msk = 0xff;

                if (!mask)
                        return;

                kfree(ops->cursor_state.mask);
                ops->cursor_state.mask = mask;

                ops->p->cursor_shape = vc->vc_cursor_type;
                cursor.set |= FB_CUR_SETSHAPE;

                switch (CUR_SIZE(ops->p->cursor_shape)) {
                case CUR_NONE:
                        cur_height = 0;
                        break;
                case CUR_UNDERLINE:
                        cur_height = (vc->vc_font.height < 10) ? 1 : 2;
                        break;
                case CUR_LOWER_THIRD:
                        cur_height = vc->vc_font.height/3;
                        break;
                case CUR_LOWER_HALF:
                        cur_height = vc->vc_font.height >> 1;
                        break;
                case CUR_TWO_THIRDS:
                        cur_height = (vc->vc_font.height << 1)/3;
                        break;
                case CUR_BLOCK:
                default:
                        cur_height = vc->vc_font.height;
                        break;
                }
                size = (vc->vc_font.height - cur_height) * w;
                while (size--)
                        mask[i++] = ~msk;
                size = cur_height * w;
                while (size--)
                        mask[i++] = msk;
        }

        ops->cursor_state.enable = enable && !use_sw;

        cursor.image.data = src;
        cursor.image.fg_color = ops->cursor_state.image.fg_color;
        cursor.image.bg_color = ops->cursor_state.image.bg_color;
        cursor.image.dx = ops->cursor_state.image.dx;
        cursor.image.dy = ops->cursor_state.image.dy;
        cursor.image.height = ops->cursor_state.image.height;
        cursor.image.width = ops->cursor_state.image.width;
        cursor.hot.x = ops->cursor_state.hot.x;
        cursor.hot.y = ops->cursor_state.hot.y;
        cursor.mask = ops->cursor_state.mask;
        cursor.enable = ops->cursor_state.enable;
        cursor.image.depth = 1;
        cursor.rop = ROP_XOR;

        if (info->fbops->fb_cursor)
                err = info->fbops->fb_cursor(info, &cursor);

        if (err)
                soft_cursor(info, &cursor);

        ops->cursor_reset = 0;
}

static int bit_update_start(struct fb_info *info)
{
        struct fbcon_ops *ops = info->fbcon_par;
        int err;

        err = fb_pan_display(info, &ops->var);
        ops->var.xoffset = info->var.xoffset;
        ops->var.yoffset = info->var.yoffset;
        ops->var.vmode = info->var.vmode;
        return err;
}

void fbcon_set_bitops(struct fbcon_ops *ops)
{
        ops->bmove = bit_bmove;
        ops->clear = bit_clear;
        ops->putcs = bit_putcs;
        ops->clear_margins = bit_clear_margins;
        ops->cursor = bit_cursor;
        ops->update_start = bit_update_start;
        ops->rotate_font = NULL;

        if (ops->rotate)
                fbcon_set_rotate(ops);
}


































    8 






































































































































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
 * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
 * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
 * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
 */
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/slab.h>
#include <net/ax25.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <linux/uaccess.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>

/*
 *        This routine purges all the queues of frames.
 */
void ax25_clear_queues(ax25_cb *ax25)
{
        skb_queue_purge(&ax25->write_queue);
        skb_queue_purge(&ax25->ack_queue);
        skb_queue_purge(&ax25->reseq_queue);
        skb_queue_purge(&ax25->frag_queue);
}

/*
 * This routine purges the input queue of those frames that have been
 * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
 * SDL diagram.
 */
void ax25_frames_acked(ax25_cb *ax25, unsigned short nr)
{
        struct sk_buff *skb;

        /*
         * Remove all the ack-ed frames from the ack queue.
         */
        if (ax25->va != nr) {
                while (skb_peek(&ax25->ack_queue) != NULL && ax25->va != nr) {
                        skb = skb_dequeue(&ax25->ack_queue);
                        kfree_skb(skb);
                        ax25->va = (ax25->va + 1) % ax25->modulus;
                }
        }
}

void ax25_requeue_frames(ax25_cb *ax25)
{
        struct sk_buff *skb;

        /*
         * Requeue all the un-ack-ed frames on the output queue to be picked
         * up by ax25_kick called from the timer. This arrangement handles the
         * possibility of an empty output queue.
         */
        while ((skb = skb_dequeue_tail(&ax25->ack_queue)) != NULL)
                skb_queue_head(&ax25->write_queue, skb);
}

/*
 *        Validate that the value of nr is between va and vs. Return true or
 *        false for testing.
 */
int ax25_validate_nr(ax25_cb *ax25, unsigned short nr)
{
        unsigned short vc = ax25->va;

        while (vc != ax25->vs) {
                if (nr == vc) return 1;
                vc = (vc + 1) % ax25->modulus;
        }

        if (nr == ax25->vs) return 1;

        return 0;
}

/*
 *        This routine is the centralised routine for parsing the control
 *        information for the different frame formats.
 */
int ax25_decode(ax25_cb *ax25, struct sk_buff *skb, int *ns, int *nr, int *pf)
{
        unsigned char *frame;
        int frametype = AX25_ILLEGAL;

        frame = skb->data;
        *ns = *nr = *pf = 0;

        if (ax25->modulus == AX25_MODULUS) {
                if ((frame[0] & AX25_S) == 0) {
                        frametype = AX25_I;                        /* I frame - carries NR/NS/PF */
                        *ns = (frame[0] >> 1) & 0x07;
                        *nr = (frame[0] >> 5) & 0x07;
                        *pf = frame[0] & AX25_PF;
                } else if ((frame[0] & AX25_U) == 1) {         /* S frame - take out PF/NR */
                        frametype = frame[0] & 0x0F;
                        *nr = (frame[0] >> 5) & 0x07;
                        *pf = frame[0] & AX25_PF;
                } else if ((frame[0] & AX25_U) == 3) {         /* U frame - take out PF */
                        frametype = frame[0] & ~AX25_PF;
                        *pf = frame[0] & AX25_PF;
                }
                skb_pull(skb, 1);
        } else {
                if ((frame[0] & AX25_S) == 0) {
                        frametype = AX25_I;                        /* I frame - carries NR/NS/PF */
                        *ns = (frame[0] >> 1) & 0x7F;
                        *nr = (frame[1] >> 1) & 0x7F;
                        *pf = frame[1] & AX25_EPF;
                        skb_pull(skb, 2);
                } else if ((frame[0] & AX25_U) == 1) {         /* S frame - take out PF/NR */
                        frametype = frame[0] & 0x0F;
                        *nr = (frame[1] >> 1) & 0x7F;
                        *pf = frame[1] & AX25_EPF;
                        skb_pull(skb, 2);
                } else if ((frame[0] & AX25_U) == 3) {         /* U frame - take out PF */
                        frametype = frame[0] & ~AX25_PF;
                        *pf = frame[0] & AX25_PF;
                        skb_pull(skb, 1);
                }
        }

        return frametype;
}

/*
 *        This routine is called when the HDLC layer internally  generates a
 *        command or  response  for  the remote machine ( eg. RR, UA etc. ).
 *        Only supervisory or unnumbered frames are processed.
 */
void ax25_send_control(ax25_cb *ax25, int frametype, int poll_bit, int type)
{
        struct sk_buff *skb;
        unsigned char  *dptr;

        if ((skb = alloc_skb(ax25->ax25_dev->dev->hard_header_len + 2, GFP_ATOMIC)) == NULL)
                return;

        skb_reserve(skb, ax25->ax25_dev->dev->hard_header_len);

        skb_reset_network_header(skb);

        /* Assume a response - address structure for DTE */
        if (ax25->modulus == AX25_MODULUS) {
                dptr = skb_put(skb, 1);
                *dptr = frametype;
                *dptr |= (poll_bit) ? AX25_PF : 0;
                if ((frametype & AX25_U) == AX25_S)                /* S frames carry NR */
                        *dptr |= (ax25->vr << 5);
        } else {
                if ((frametype & AX25_U) == AX25_U) {
                        dptr = skb_put(skb, 1);
                        *dptr = frametype;
                        *dptr |= (poll_bit) ? AX25_PF : 0;
                } else {
                        dptr = skb_put(skb, 2);
                        dptr[0] = frametype;
                        dptr[1] = (ax25->vr << 1);
                        dptr[1] |= (poll_bit) ? AX25_EPF : 0;
                }
        }

        ax25_transmit_buffer(ax25, skb, type);
}

/*
 *        Send a 'DM' to an unknown connection attempt, or an invalid caller.
 *
 *        Note: src here is the sender, thus it's the target of the DM
 */
void ax25_return_dm(struct net_device *dev, ax25_address *src, ax25_address *dest, ax25_digi *digi)
{
        struct sk_buff *skb;
        char *dptr;
        ax25_digi retdigi;

        if (dev == NULL)
                return;

        if ((skb = alloc_skb(dev->hard_header_len + 1, GFP_ATOMIC)) == NULL)
                return;        /* Next SABM will get DM'd */

        skb_reserve(skb, dev->hard_header_len);
        skb_reset_network_header(skb);

        ax25_digi_invert(digi, &retdigi);

        dptr = skb_put(skb, 1);

        *dptr = AX25_DM | AX25_PF;

        /*
         *        Do the address ourselves
         */
        dptr  = skb_push(skb, ax25_addr_size(digi));
        dptr += ax25_addr_build(dptr, dest, src, &retdigi, AX25_RESPONSE, AX25_MODULUS);

        ax25_queue_xmit(skb, dev);
}

/*
 *        Exponential backoff for AX.25
 */
void ax25_calculate_t1(ax25_cb *ax25)
{
        int n, t = 2;

        switch (ax25->backoff) {
        case 0:
                break;

        case 1:
                t += 2 * ax25->n2count;
                break;

        case 2:
                for (n = 0; n < ax25->n2count; n++)
                        t *= 2;
                if (t > 8) t = 8;
                break;
        }

        ax25->t1 = t * ax25->rtt;
}

/*
 *        Calculate the Round Trip Time
 */
void ax25_calculate_rtt(ax25_cb *ax25)
{
        if (ax25->backoff == 0)
                return;

        if (ax25_t1timer_running(ax25) && ax25->n2count == 0)
                ax25->rtt = (9 * ax25->rtt + ax25->t1 - ax25_display_timer(&ax25->t1timer)) / 10;

        if (ax25->rtt < AX25_T1CLAMPLO)
                ax25->rtt = AX25_T1CLAMPLO;

        if (ax25->rtt > AX25_T1CLAMPHI)
                ax25->rtt = AX25_T1CLAMPHI;
}

void ax25_disconnect(ax25_cb *ax25, int reason)
{
        ax25_clear_queues(ax25);

        if (reason == ENETUNREACH) {
                del_timer_sync(&ax25->timer);
                del_timer_sync(&ax25->t1timer);
                del_timer_sync(&ax25->t2timer);
                del_timer_sync(&ax25->t3timer);
                del_timer_sync(&ax25->idletimer);
        } else {
                if (ax25->sk && !sock_flag(ax25->sk, SOCK_DESTROY))
                        ax25_stop_heartbeat(ax25);
                ax25_stop_t1timer(ax25);
                ax25_stop_t2timer(ax25);
                ax25_stop_t3timer(ax25);
                ax25_stop_idletimer(ax25);
        }

        ax25->state = AX25_STATE_0;

        ax25_link_failed(ax25, reason);

        if (ax25->sk != NULL) {
                local_bh_disable();
                bh_lock_sock(ax25->sk);
                ax25->sk->sk_state     = TCP_CLOSE;
                ax25->sk->sk_err       = reason;
                ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
                if (!sock_flag(ax25->sk, SOCK_DEAD)) {
                        ax25->sk->sk_state_change(ax25->sk);
                        sock_set_flag(ax25->sk, SOCK_DEAD);
                }
                bh_unlock_sock(ax25->sk);
                local_bh_enable();
        }
}



































































   13 






    8 




















   27 
   24 



    4 


    3 

  338 






















 1378 





   21 




    7 





   36 

 1321 






  143 

















  526 








   63 

  619 

  468 






















  358 



  338 



    6 


  630 
  433 




    4 




  619 
  102 

























  681 
  684 





















 2330 












 2329 
 2326 






 2249 






  143 
  141 











 2328 









 2254 








  143 
















































    5 

















    5 
    5 
    5 
    4 
    1 







    5 

















  341 







    1 



  214 



    5 













  121 


    3 





  118 
















 1979 
    1 


   50 
    9 










 2026 


  968 
 1123 





   49 
 1980 


 2024 
 2024 
 2024 
 2028 










  604 



  604 
    1 


































  203 





  199 






    3 

    4 











    5 
    2 



    3 

    3 



    3 
    2 



    2 














  792 









  138 




  658 






  789 







  476 




  126 







   33 



    1 



   32 
















  795 



  796 




 2022 























   71 
    3 
   68 














  348 


  325 





    3 
   36 







1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
// SPDX-License-Identifier: GPL-2.0-or-later
/* Provide a way to create a superblock configuration context within the kernel
 * that allows a superblock to be set up prior to mounting.
 *
 * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/nsproxy.h>
#include <linux/slab.h>
#include <linux/magic.h>
#include <linux/security.h>
#include <linux/mnt_namespace.h>
#include <linux/pid_namespace.h>
#include <linux/user_namespace.h>
#include <net/net_namespace.h>
#include <asm/sections.h>
#include "mount.h"
#include "internal.h"

enum legacy_fs_param {
        LEGACY_FS_UNSET_PARAMS,
        LEGACY_FS_MONOLITHIC_PARAMS,
        LEGACY_FS_INDIVIDUAL_PARAMS,
};

struct legacy_fs_context {
        char                        *legacy_data;        /* Data page for legacy filesystems */
        size_t                        data_size;
        enum legacy_fs_param        param_type;
};

static int legacy_init_fs_context(struct fs_context *fc);

static const struct constant_table common_set_sb_flag[] = {
        { "dirsync",        SB_DIRSYNC },
        { "lazytime",        SB_LAZYTIME },
        { "mand",        SB_MANDLOCK },
        { "ro",                SB_RDONLY },
        { "sync",        SB_SYNCHRONOUS },
        { },
};

static const struct constant_table common_clear_sb_flag[] = {
        { "async",        SB_SYNCHRONOUS },
        { "nolazytime",        SB_LAZYTIME },
        { "nomand",        SB_MANDLOCK },
        { "rw",                SB_RDONLY },
        { },
};

/*
 * Check for a common mount option that manipulates s_flags.
 */
static int vfs_parse_sb_flag(struct fs_context *fc, const char *key)
{
        unsigned int token;

        token = lookup_constant(common_set_sb_flag, key, 0);
        if (token) {
                fc->sb_flags |= token;
                fc->sb_flags_mask |= token;
                return 0;
        }

        token = lookup_constant(common_clear_sb_flag, key, 0);
        if (token) {
                fc->sb_flags &= ~token;
                fc->sb_flags_mask |= token;
                return 0;
        }

        return -ENOPARAM;
}

/**
 * vfs_parse_fs_param_source - Handle setting "source" via parameter
 * @fc: The filesystem context to modify
 * @param: The parameter
 *
 * This is a simple helper for filesystems to verify that the "source" they
 * accept is sane.
 *
 * Returns 0 on success, -ENOPARAM if this is not  "source" parameter, and
 * -EINVAL otherwise. In the event of failure, supplementary error information
 *  is logged.
 */
int vfs_parse_fs_param_source(struct fs_context *fc, struct fs_parameter *param)
{
        if (strcmp(param->key, "source") != 0)
                return -ENOPARAM;

        if (param->type != fs_value_is_string)
                return invalf(fc, "Non-string source");

        if (fc->source)
                return invalf(fc, "Multiple sources");

        fc->source = param->string;
        param->string = NULL;
        return 0;
}
EXPORT_SYMBOL(vfs_parse_fs_param_source);

/**
 * vfs_parse_fs_param - Add a single parameter to a superblock config
 * @fc: The filesystem context to modify
 * @param: The parameter
 *
 * A single mount option in string form is applied to the filesystem context
 * being set up.  Certain standard options (for example "ro") are translated
 * into flag bits without going to the filesystem.  The active security module
 * is allowed to observe and poach options.  Any other options are passed over
 * to the filesystem to parse.
 *
 * This may be called multiple times for a context.
 *
 * Returns 0 on success and a negative error code on failure.  In the event of
 * failure, supplementary error information may have been set.
 */
int vfs_parse_fs_param(struct fs_context *fc, struct fs_parameter *param)
{
        int ret;

        if (!param->key)
                return invalf(fc, "Unnamed parameter\n");

        ret = vfs_parse_sb_flag(fc, param->key);
        if (ret != -ENOPARAM)
                return ret;

        ret = security_fs_context_parse_param(fc, param);
        if (ret != -ENOPARAM)
                /* Param belongs to the LSM or is disallowed by the LSM; so
                 * don't pass to the FS.
                 */
                return ret;

        if (fc->ops->parse_param) {
                ret = fc->ops->parse_param(fc, param);
                if (ret != -ENOPARAM)
                        return ret;
        }

        /* If the filesystem doesn't take any arguments, give it the
         * default handling of source.
         */
        ret = vfs_parse_fs_param_source(fc, param);
        if (ret != -ENOPARAM)
                return ret;

        return invalf(fc, "%s: Unknown parameter '%s'",
                      fc->fs_type->name, param->key);
}
EXPORT_SYMBOL(vfs_parse_fs_param);

/**
 * vfs_parse_fs_string - Convenience function to just parse a string.
 * @fc: Filesystem context.
 * @key: Parameter name.
 * @value: Default value.
 * @v_size: Maximum number of bytes in the value.
 */
int vfs_parse_fs_string(struct fs_context *fc, const char *key,
                        const char *value, size_t v_size)
{
        int ret;

        struct fs_parameter param = {
                .key        = key,
                .type        = fs_value_is_flag,
                .size        = v_size,
        };

        if (value) {
                param.string = kmemdup_nul(value, v_size, GFP_KERNEL);
                if (!param.string)
                        return -ENOMEM;
                param.type = fs_value_is_string;
        }

        ret = vfs_parse_fs_param(fc, &param);
        kfree(param.string);
        return ret;
}
EXPORT_SYMBOL(vfs_parse_fs_string);

/**
 * vfs_parse_monolithic_sep - Parse key[=val][,key[=val]]* mount data
 * @fc: The superblock configuration to fill in.
 * @data: The data to parse
 * @sep: callback for separating next option
 *
 * Parse a blob of data that's in key[=val][,key[=val]]* form with a custom
 * option separator callback.
 *
 * Returns 0 on success or the error returned by the ->parse_option() fs_context
 * operation on failure.
 */
int vfs_parse_monolithic_sep(struct fs_context *fc, void *data,
                             char *(*sep)(char **))
{
        char *options = data, *key;
        int ret = 0;

        if (!options)
                return 0;

        ret = security_sb_eat_lsm_opts(options, &fc->security);
        if (ret)
                return ret;

        while ((key = sep(&options)) != NULL) {
                if (*key) {
                        size_t v_len = 0;
                        char *value = strchr(key, '=');

                        if (value) {
                                if (value == key)
                                        continue;
                                *value++ = 0;
                                v_len = strlen(value);
                        }
                        ret = vfs_parse_fs_string(fc, key, value, v_len);
                        if (ret < 0)
                                break;
                }
        }

        return ret;
}
EXPORT_SYMBOL(vfs_parse_monolithic_sep);

static char *vfs_parse_comma_sep(char **s)
{
        return strsep(s, ",");
}

/**
 * generic_parse_monolithic - Parse key[=val][,key[=val]]* mount data
 * @fc: The superblock configuration to fill in.
 * @data: The data to parse
 *
 * Parse a blob of data that's in key[=val][,key[=val]]* form.  This can be
 * called from the ->monolithic_mount_data() fs_context operation.
 *
 * Returns 0 on success or the error returned by the ->parse_option() fs_context
 * operation on failure.
 */
int generic_parse_monolithic(struct fs_context *fc, void *data)
{
        return vfs_parse_monolithic_sep(fc, data, vfs_parse_comma_sep);
}
EXPORT_SYMBOL(generic_parse_monolithic);

/**
 * alloc_fs_context - Create a filesystem context.
 * @fs_type: The filesystem type.
 * @reference: The dentry from which this one derives (or NULL)
 * @sb_flags: Filesystem/superblock flags (SB_*)
 * @sb_flags_mask: Applicable members of @sb_flags
 * @purpose: The purpose that this configuration shall be used for.
 *
 * Open a filesystem and create a mount context.  The mount context is
 * initialised with the supplied flags and, if a submount/automount from
 * another superblock (referred to by @reference) is supplied, may have
 * parameters such as namespaces copied across from that superblock.
 */
static struct fs_context *alloc_fs_context(struct file_system_type *fs_type,
                                      struct dentry *reference,
                                      unsigned int sb_flags,
                                      unsigned int sb_flags_mask,
                                      enum fs_context_purpose purpose)
{
        int (*init_fs_context)(struct fs_context *);
        struct fs_context *fc;
        int ret = -ENOMEM;

        fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL_ACCOUNT);
        if (!fc)
                return ERR_PTR(-ENOMEM);

        fc->purpose        = purpose;
        fc->sb_flags        = sb_flags;
        fc->sb_flags_mask = sb_flags_mask;
        fc->fs_type        = get_filesystem(fs_type);
        fc->cred        = get_current_cred();
        fc->net_ns        = get_net(current->nsproxy->net_ns);
        fc->log.prefix        = fs_type->name;

        mutex_init(&fc->uapi_mutex);

        switch (purpose) {
        case FS_CONTEXT_FOR_MOUNT:
                fc->user_ns = get_user_ns(fc->cred->user_ns);
                break;
        case FS_CONTEXT_FOR_SUBMOUNT:
                fc->user_ns = get_user_ns(reference->d_sb->s_user_ns);
                break;
        case FS_CONTEXT_FOR_RECONFIGURE:
                atomic_inc(&reference->d_sb->s_active);
                fc->user_ns = get_user_ns(reference->d_sb->s_user_ns);
                fc->root = dget(reference);
                break;
        }

        /* TODO: Make all filesystems support this unconditionally */
        init_fs_context = fc->fs_type->init_fs_context;
        if (!init_fs_context)
                init_fs_context = legacy_init_fs_context;

        ret = init_fs_context(fc);
        if (ret < 0)
                goto err_fc;
        fc->need_free = true;
        return fc;

err_fc:
        put_fs_context(fc);
        return ERR_PTR(ret);
}

struct fs_context *fs_context_for_mount(struct file_system_type *fs_type,
                                        unsigned int sb_flags)
{
        return alloc_fs_context(fs_type, NULL, sb_flags, 0,
                                        FS_CONTEXT_FOR_MOUNT);
}
EXPORT_SYMBOL(fs_context_for_mount);

struct fs_context *fs_context_for_reconfigure(struct dentry *dentry,
                                        unsigned int sb_flags,
                                        unsigned int sb_flags_mask)
{
        return alloc_fs_context(dentry->d_sb->s_type, dentry, sb_flags,
                                sb_flags_mask, FS_CONTEXT_FOR_RECONFIGURE);
}
EXPORT_SYMBOL(fs_context_for_reconfigure);

/**
 * fs_context_for_submount: allocate a new fs_context for a submount
 * @type: file_system_type of the new context
 * @reference: reference dentry from which to copy relevant info
 *
 * Allocate a new fs_context suitable for a submount. This also ensures that
 * the fc->security object is inherited from @reference (if needed).
 */
struct fs_context *fs_context_for_submount(struct file_system_type *type,
                                           struct dentry *reference)
{
        struct fs_context *fc;
        int ret;

        fc = alloc_fs_context(type, reference, 0, 0, FS_CONTEXT_FOR_SUBMOUNT);
        if (IS_ERR(fc))
                return fc;

        ret = security_fs_context_submount(fc, reference->d_sb);
        if (ret) {
                put_fs_context(fc);
                return ERR_PTR(ret);
        }

        return fc;
}
EXPORT_SYMBOL(fs_context_for_submount);

void fc_drop_locked(struct fs_context *fc)
{
        struct super_block *sb = fc->root->d_sb;
        dput(fc->root);
        fc->root = NULL;
        deactivate_locked_super(sb);
}

static void legacy_fs_context_free(struct fs_context *fc);

/**
 * vfs_dup_fs_context - Duplicate a filesystem context.
 * @src_fc: The context to copy.
 */
struct fs_context *vfs_dup_fs_context(struct fs_context *src_fc)
{
        struct fs_context *fc;
        int ret;

        if (!src_fc->ops->dup)
                return ERR_PTR(-EOPNOTSUPP);

        fc = kmemdup(src_fc, sizeof(struct fs_context), GFP_KERNEL);
        if (!fc)
                return ERR_PTR(-ENOMEM);

        mutex_init(&fc->uapi_mutex);

        fc->fs_private        = NULL;
        fc->s_fs_info        = NULL;
        fc->source        = NULL;
        fc->security        = NULL;
        get_filesystem(fc->fs_type);
        get_net(fc->net_ns);
        get_user_ns(fc->user_ns);
        get_cred(fc->cred);
        if (fc->log.log)
                refcount_inc(&fc->log.log->usage);

        /* Can't call put until we've called ->dup */
        ret = fc->ops->dup(fc, src_fc);
        if (ret < 0)
                goto err_fc;

        ret = security_fs_context_dup(fc, src_fc);
        if (ret < 0)
                goto err_fc;
        return fc;

err_fc:
        put_fs_context(fc);
        return ERR_PTR(ret);
}
EXPORT_SYMBOL(vfs_dup_fs_context);

/**
 * logfc - Log a message to a filesystem context
 * @log: The filesystem context to log to, or NULL to use printk.
 * @prefix: A string to prefix the output with, or NULL.
 * @level: 'w' for a warning, 'e' for an error.  Anything else is a notice.
 * @fmt: The format of the buffer.
 */
void logfc(struct fc_log *log, const char *prefix, char level, const char *fmt, ...)
{
        va_list va;
        struct va_format vaf = {.fmt = fmt, .va = &va};

        va_start(va, fmt);
        if (!log) {
                switch (level) {
                case 'w':
                        printk(KERN_WARNING "%s%s%pV\n", prefix ? prefix : "",
                                                prefix ? ": " : "", &vaf);
                        break;
                case 'e':
                        printk(KERN_ERR "%s%s%pV\n", prefix ? prefix : "",
                                                prefix ? ": " : "", &vaf);
                        break;
                default:
                        printk(KERN_NOTICE "%s%s%pV\n", prefix ? prefix : "",
                                                prefix ? ": " : "", &vaf);
                        break;
                }
        } else {
                unsigned int logsize = ARRAY_SIZE(log->buffer);
                u8 index;
                char *q = kasprintf(GFP_KERNEL, "%c %s%s%pV\n", level,
                                                prefix ? prefix : "",
                                                prefix ? ": " : "", &vaf);

                index = log->head & (logsize - 1);
                BUILD_BUG_ON(sizeof(log->head) != sizeof(u8) ||
                             sizeof(log->tail) != sizeof(u8));
                if ((u8)(log->head - log->tail) == logsize) {
                        /* The buffer is full, discard the oldest message */
                        if (log->need_free & (1 << index))
                                kfree(log->buffer[index]);
                        log->tail++;
                }

                log->buffer[index] = q ? q : "OOM: Can't store error string";
                if (q)
                        log->need_free |= 1 << index;
                else
                        log->need_free &= ~(1 << index);
                log->head++;
        }
        va_end(va);
}
EXPORT_SYMBOL(logfc);

/*
 * Free a logging structure.
 */
static void put_fc_log(struct fs_context *fc)
{
        struct fc_log *log = fc->log.log;
        int i;

        if (log) {
                if (refcount_dec_and_test(&log->usage)) {
                        fc->log.log = NULL;
                        for (i = 0; i <= 7; i++)
                                if (log->need_free & (1 << i))
                                        kfree(log->buffer[i]);
                        kfree(log);
                }
        }
}

/**
 * put_fs_context - Dispose of a superblock configuration context.
 * @fc: The context to dispose of.
 */
void put_fs_context(struct fs_context *fc)
{
        struct super_block *sb;

        if (fc->root) {
                sb = fc->root->d_sb;
                dput(fc->root);
                fc->root = NULL;
                deactivate_super(sb);
        }

        if (fc->need_free && fc->ops && fc->ops->free)
                fc->ops->free(fc);

        security_free_mnt_opts(&fc->security);
        put_net(fc->net_ns);
        put_user_ns(fc->user_ns);
        put_cred(fc->cred);
        put_fc_log(fc);
        put_filesystem(fc->fs_type);
        kfree(fc->source);
        kfree(fc);
}
EXPORT_SYMBOL(put_fs_context);

/*
 * Free the config for a filesystem that doesn't support fs_context.
 */
static void legacy_fs_context_free(struct fs_context *fc)
{
        struct legacy_fs_context *ctx = fc->fs_private;

        if (ctx) {
                if (ctx->param_type == LEGACY_FS_INDIVIDUAL_PARAMS)
                        kfree(ctx->legacy_data);
                kfree(ctx);
        }
}

/*
 * Duplicate a legacy config.
 */
static int legacy_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
{
        struct legacy_fs_context *ctx;
        struct legacy_fs_context *src_ctx = src_fc->fs_private;

        ctx = kmemdup(src_ctx, sizeof(*src_ctx), GFP_KERNEL);
        if (!ctx)
                return -ENOMEM;

        if (ctx->param_type == LEGACY_FS_INDIVIDUAL_PARAMS) {
                ctx->legacy_data = kmemdup(src_ctx->legacy_data,
                                           src_ctx->data_size, GFP_KERNEL);
                if (!ctx->legacy_data) {
                        kfree(ctx);
                        return -ENOMEM;
                }
        }

        fc->fs_private = ctx;
        return 0;
}

/*
 * Add a parameter to a legacy config.  We build up a comma-separated list of
 * options.
 */
static int legacy_parse_param(struct fs_context *fc, struct fs_parameter *param)
{
        struct legacy_fs_context *ctx = fc->fs_private;
        unsigned int size = ctx->data_size;
        size_t len = 0;
        int ret;

        ret = vfs_parse_fs_param_source(fc, param);
        if (ret != -ENOPARAM)
                return ret;

        if (ctx->param_type == LEGACY_FS_MONOLITHIC_PARAMS)
                return invalf(fc, "VFS: Legacy: Can't mix monolithic and individual options");

        switch (param->type) {
        case fs_value_is_string:
                len = 1 + param->size;
                fallthrough;
        case fs_value_is_flag:
                len += strlen(param->key);
                break;
        default:
                return invalf(fc, "VFS: Legacy: Parameter type for '%s' not supported",
                              param->key);
        }

        if (size + len + 2 > PAGE_SIZE)
                return invalf(fc, "VFS: Legacy: Cumulative options too large");
        if (strchr(param->key, ',') ||
            (param->type == fs_value_is_string &&
             memchr(param->string, ',', param->size)))
                return invalf(fc, "VFS: Legacy: Option '%s' contained comma",
                              param->key);
        if (!ctx->legacy_data) {
                ctx->legacy_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
                if (!ctx->legacy_data)
                        return -ENOMEM;
        }

        if (size)
                ctx->legacy_data[size++] = ',';
        len = strlen(param->key);
        memcpy(ctx->legacy_data + size, param->key, len);
        size += len;
        if (param->type == fs_value_is_string) {
                ctx->legacy_data[size++] = '=';
                memcpy(ctx->legacy_data + size, param->string, param->size);
                size += param->size;
        }
        ctx->legacy_data[size] = '\0';
        ctx->data_size = size;
        ctx->param_type = LEGACY_FS_INDIVIDUAL_PARAMS;
        return 0;
}

/*
 * Add monolithic mount data.
 */
static int legacy_parse_monolithic(struct fs_context *fc, void *data)
{
        struct legacy_fs_context *ctx = fc->fs_private;

        if (ctx->param_type != LEGACY_FS_UNSET_PARAMS) {
                pr_warn("VFS: Can't mix monolithic and individual options\n");
                return -EINVAL;
        }

        ctx->legacy_data = data;
        ctx->param_type = LEGACY_FS_MONOLITHIC_PARAMS;
        if (!ctx->legacy_data)
                return 0;

        if (fc->fs_type->fs_flags & FS_BINARY_MOUNTDATA)
                return 0;
        return security_sb_eat_lsm_opts(ctx->legacy_data, &fc->security);
}

/*
 * Get a mountable root with the legacy mount command.
 */
static int legacy_get_tree(struct fs_context *fc)
{
        struct legacy_fs_context *ctx = fc->fs_private;
        struct super_block *sb;
        struct dentry *root;

        root = fc->fs_type->mount(fc->fs_type, fc->sb_flags,
                                      fc->source, ctx->legacy_data);
        if (IS_ERR(root))
                return PTR_ERR(root);

        sb = root->d_sb;
        BUG_ON(!sb);

        fc->root = root;
        return 0;
}

/*
 * Handle remount.
 */
static int legacy_reconfigure(struct fs_context *fc)
{
        struct legacy_fs_context *ctx = fc->fs_private;
        struct super_block *sb = fc->root->d_sb;

        if (!sb->s_op->remount_fs)
                return 0;

        return sb->s_op->remount_fs(sb, &fc->sb_flags,
                                    ctx ? ctx->legacy_data : NULL);
}

const struct fs_context_operations legacy_fs_context_ops = {
        .free                        = legacy_fs_context_free,
        .dup                        = legacy_fs_context_dup,
        .parse_param                = legacy_parse_param,
        .parse_monolithic        = legacy_parse_monolithic,
        .get_tree                = legacy_get_tree,
        .reconfigure                = legacy_reconfigure,
};

/*
 * Initialise a legacy context for a filesystem that doesn't support
 * fs_context.
 */
static int legacy_init_fs_context(struct fs_context *fc)
{
        fc->fs_private = kzalloc(sizeof(struct legacy_fs_context), GFP_KERNEL_ACCOUNT);
        if (!fc->fs_private)
                return -ENOMEM;
        fc->ops = &legacy_fs_context_ops;
        return 0;
}

int parse_monolithic_mount_data(struct fs_context *fc, void *data)
{
        int (*monolithic_mount_data)(struct fs_context *, void *);

        monolithic_mount_data = fc->ops->parse_monolithic;
        if (!monolithic_mount_data)
                monolithic_mount_data = generic_parse_monolithic;

        return monolithic_mount_data(fc, data);
}

/*
 * Clean up a context after performing an action on it and put it into a state
 * from where it can be used to reconfigure a superblock.
 *
 * Note that here we do only the parts that can't fail; the rest is in
 * finish_clean_context() below and in between those fs_context is marked
 * FS_CONTEXT_AWAITING_RECONF.  The reason for splitup is that after
 * successful mount or remount we need to report success to userland.
 * Trying to do full reinit (for the sake of possible subsequent remount)
 * and failing to allocate memory would've put us into a nasty situation.
 * So here we only discard the old state and reinitialization is left
 * until we actually try to reconfigure.
 */
void vfs_clean_context(struct fs_context *fc)
{
        if (fc->need_free && fc->ops && fc->ops->free)
                fc->ops->free(fc);
        fc->need_free = false;
        fc->fs_private = NULL;
        fc->s_fs_info = NULL;
        fc->sb_flags = 0;
        security_free_mnt_opts(&fc->security);
        kfree(fc->source);
        fc->source = NULL;
        fc->exclusive = false;

        fc->purpose = FS_CONTEXT_FOR_RECONFIGURE;
        fc->phase = FS_CONTEXT_AWAITING_RECONF;
}

int finish_clean_context(struct fs_context *fc)
{
        int error;

        if (fc->phase != FS_CONTEXT_AWAITING_RECONF)
                return 0;

        if (fc->fs_type->init_fs_context)
                error = fc->fs_type->init_fs_context(fc);
        else
                error = legacy_init_fs_context(fc);
        if (unlikely(error)) {
                fc->phase = FS_CONTEXT_FAILED;
                return error;
        }
        fc->need_free = true;
        fc->phase = FS_CONTEXT_RECONF_PARAMS;
        return 0;
}













































































   16 


   18 
    2 
   16 








   33 
   33 





   33 


   31 

    2 






    1 

    1 



    1 











    1 




   25 


   22 
   21 






    3 



   16 















































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/socket.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/udp.h>
#include <linux/icmpv6.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <net/fou.h>
#include <net/ip.h>
#include <net/ip6_tunnel.h>
#include <net/ip6_checksum.h>
#include <net/protocol.h>
#include <net/udp.h>
#include <net/udp_tunnel.h>

#if IS_ENABLED(CONFIG_IPV6_FOU_TUNNEL)

static void fou6_build_udp(struct sk_buff *skb, struct ip_tunnel_encap *e,
                           struct flowi6 *fl6, u8 *protocol, __be16 sport)
{
        struct udphdr *uh;

        skb_push(skb, sizeof(struct udphdr));
        skb_reset_transport_header(skb);

        uh = udp_hdr(skb);

        uh->dest = e->dport;
        uh->source = sport;
        uh->len = htons(skb->len);
        udp6_set_csum(!(e->flags & TUNNEL_ENCAP_FLAG_CSUM6), skb,
                      &fl6->saddr, &fl6->daddr, skb->len);

        *protocol = IPPROTO_UDP;
}

static int fou6_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
                             u8 *protocol, struct flowi6 *fl6)
{
        __be16 sport;
        int err;
        int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ?
                SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;

        err = __fou_build_header(skb, e, protocol, &sport, type);
        if (err)
                return err;

        fou6_build_udp(skb, e, fl6, protocol, sport);

        return 0;
}

static int gue6_build_header(struct sk_buff *skb, struct ip_tunnel_encap *e,
                             u8 *protocol, struct flowi6 *fl6)
{
        __be16 sport;
        int err;
        int type = e->flags & TUNNEL_ENCAP_FLAG_CSUM6 ?
                SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;

        err = __gue_build_header(skb, e, protocol, &sport, type);
        if (err)
                return err;

        fou6_build_udp(skb, e, fl6, protocol, sport);

        return 0;
}

static int gue6_err_proto_handler(int proto, struct sk_buff *skb,
                                  struct inet6_skb_parm *opt,
                                  u8 type, u8 code, int offset, __be32 info)
{
        const struct inet6_protocol *ipprot;

        ipprot = rcu_dereference(inet6_protos[proto]);
        if (ipprot && ipprot->err_handler) {
                if (!ipprot->err_handler(skb, opt, type, code, offset, info))
                        return 0;
        }

        return -ENOENT;
}

static int gue6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                    u8 type, u8 code, int offset, __be32 info)
{
        int transport_offset = skb_transport_offset(skb);
        struct guehdr *guehdr;
        size_t len, optlen;
        int ret;

        len = sizeof(struct udphdr) + sizeof(struct guehdr);
        if (!pskb_may_pull(skb, transport_offset + len))
                return -EINVAL;

        guehdr = (struct guehdr *)&udp_hdr(skb)[1];

        switch (guehdr->version) {
        case 0: /* Full GUE header present */
                break;
        case 1: {
                /* Direct encasulation of IPv4 or IPv6 */
                skb_set_transport_header(skb, -(int)sizeof(struct icmp6hdr));

                switch (((struct iphdr *)guehdr)->version) {
                case 4:
                        ret = gue6_err_proto_handler(IPPROTO_IPIP, skb, opt,
                                                     type, code, offset, info);
                        goto out;
                case 6:
                        ret = gue6_err_proto_handler(IPPROTO_IPV6, skb, opt,
                                                     type, code, offset, info);
                        goto out;
                default:
                        ret = -EOPNOTSUPP;
                        goto out;
                }
        }
        default: /* Undefined version */
                return -EOPNOTSUPP;
        }

        if (guehdr->control)
                return -ENOENT;

        optlen = guehdr->hlen << 2;

        if (!pskb_may_pull(skb, transport_offset + len + optlen))
                return -EINVAL;

        guehdr = (struct guehdr *)&udp_hdr(skb)[1];
        if (validate_gue_flags(guehdr, optlen))
                return -EINVAL;

        /* Handling exceptions for direct UDP encapsulation in GUE would lead to
         * recursion. Besides, this kind of encapsulation can't even be
         * configured currently. Discard this.
         */
        if (guehdr->proto_ctype == IPPROTO_UDP ||
            guehdr->proto_ctype == IPPROTO_UDPLITE)
                return -EOPNOTSUPP;

        skb_set_transport_header(skb, -(int)sizeof(struct icmp6hdr));
        ret = gue6_err_proto_handler(guehdr->proto_ctype, skb,
                                     opt, type, code, offset, info);

out:
        skb_set_transport_header(skb, transport_offset);
        return ret;
}


static const struct ip6_tnl_encap_ops fou_ip6tun_ops = {
        .encap_hlen = fou_encap_hlen,
        .build_header = fou6_build_header,
        .err_handler = gue6_err,
};

static const struct ip6_tnl_encap_ops gue_ip6tun_ops = {
        .encap_hlen = gue_encap_hlen,
        .build_header = gue6_build_header,
        .err_handler = gue6_err,
};

static int ip6_tnl_encap_add_fou_ops(void)
{
        int ret;

        ret = ip6_tnl_encap_add_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
        if (ret < 0) {
                pr_err("can't add fou6 ops\n");
                return ret;
        }

        ret = ip6_tnl_encap_add_ops(&gue_ip6tun_ops, TUNNEL_ENCAP_GUE);
        if (ret < 0) {
                pr_err("can't add gue6 ops\n");
                ip6_tnl_encap_del_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
                return ret;
        }

        return 0;
}

static void ip6_tnl_encap_del_fou_ops(void)
{
        ip6_tnl_encap_del_ops(&fou_ip6tun_ops, TUNNEL_ENCAP_FOU);
        ip6_tnl_encap_del_ops(&gue_ip6tun_ops, TUNNEL_ENCAP_GUE);
}

#else

static int ip6_tnl_encap_add_fou_ops(void)
{
        return 0;
}

static void ip6_tnl_encap_del_fou_ops(void)
{
}

#endif

static int __init fou6_init(void)
{
        int ret;

        ret = ip6_tnl_encap_add_fou_ops();

        return ret;
}

static void __exit fou6_fini(void)
{
        ip6_tnl_encap_del_fou_ops();
}

module_init(fou6_init);
module_exit(fou6_fini);
MODULE_AUTHOR("Tom Herbert <therbert@google.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Foo over UDP (IPv6)");














 15871 

























































 15872 







































































 15999 






 2132 






 2489 






































































  119 













 1952 






   69 






 2486 























  119 













 1952 






 2486 






   68 










1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM net

#if !defined(_TRACE_NET_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_NET_H

#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/tracepoint.h>

TRACE_EVENT(net_dev_start_xmit,

        TP_PROTO(const struct sk_buff *skb, const struct net_device *dev),

        TP_ARGS(skb, dev),

        TP_STRUCT__entry(
                __string(        name,                        dev->name        )
                __field(        u16,                        queue_mapping        )
                __field(        const void *,                skbaddr                )
                __field(        bool,                        vlan_tagged        )
                __field(        u16,                        vlan_proto        )
                __field(        u16,                        vlan_tci        )
                __field(        u16,                        protocol        )
                __field(        u8,                        ip_summed        )
                __field(        unsigned int,                len                )
                __field(        unsigned int,                data_len        )
                __field(        int,                        network_offset        )
                __field(        bool,                        transport_offset_valid)
                __field(        int,                        transport_offset)
                __field(        u8,                        tx_flags        )
                __field(        u16,                        gso_size        )
                __field(        u16,                        gso_segs        )
                __field(        u16,                        gso_type        )
        ),

        TP_fast_assign(
                __assign_str(name);
                __entry->queue_mapping = skb->queue_mapping;
                __entry->skbaddr = skb;
                __entry->vlan_tagged = skb_vlan_tag_present(skb);
                __entry->vlan_proto = ntohs(skb->vlan_proto);
                __entry->vlan_tci = skb_vlan_tag_get(skb);
                __entry->protocol = ntohs(skb->protocol);
                __entry->ip_summed = skb->ip_summed;
                __entry->len = skb->len;
                __entry->data_len = skb->data_len;
                __entry->network_offset = skb_network_offset(skb);
                __entry->transport_offset_valid =
                        skb_transport_header_was_set(skb);
                __entry->transport_offset = skb_transport_header_was_set(skb) ?
                        skb_transport_offset(skb) : 0;
                __entry->tx_flags = skb_shinfo(skb)->tx_flags;
                __entry->gso_size = skb_shinfo(skb)->gso_size;
                __entry->gso_segs = skb_shinfo(skb)->gso_segs;
                __entry->gso_type = skb_shinfo(skb)->gso_type;
        ),

        TP_printk("dev=%s queue_mapping=%u skbaddr=%p vlan_tagged=%d vlan_proto=0x%04x vlan_tci=0x%04x protocol=0x%04x ip_summed=%d len=%u data_len=%u network_offset=%d transport_offset_valid=%d transport_offset=%d tx_flags=%d gso_size=%d gso_segs=%d gso_type=%#x",
                  __get_str(name), __entry->queue_mapping, __entry->skbaddr,
                  __entry->vlan_tagged, __entry->vlan_proto, __entry->vlan_tci,
                  __entry->protocol, __entry->ip_summed, __entry->len,
                  __entry->data_len,
                  __entry->network_offset, __entry->transport_offset_valid,
                  __entry->transport_offset, __entry->tx_flags,
                  __entry->gso_size, __entry->gso_segs, __entry->gso_type)
);

TRACE_EVENT(net_dev_xmit,

        TP_PROTO(struct sk_buff *skb,
                 int rc,
                 struct net_device *dev,
                 unsigned int skb_len),

        TP_ARGS(skb, rc, dev, skb_len),

        TP_STRUCT__entry(
                __field(        void *,                skbaddr                )
                __field(        unsigned int,        len                )
                __field(        int,                rc                )
                __string(        name,                dev->name        )
        ),

        TP_fast_assign(
                __entry->skbaddr = skb;
                __entry->len = skb_len;
                __entry->rc = rc;
                __assign_str(name);
        ),

        TP_printk("dev=%s skbaddr=%p len=%u rc=%d",
                __get_str(name), __entry->skbaddr, __entry->len, __entry->rc)
);

TRACE_EVENT(net_dev_xmit_timeout,

        TP_PROTO(struct net_device *dev,
                 int queue_index),

        TP_ARGS(dev, queue_index),

        TP_STRUCT__entry(
                __string(        name,                dev->name        )
                __string(        driver,                netdev_drivername(dev))
                __field(        int,                queue_index        )
        ),

        TP_fast_assign(
                __assign_str(name);
                __assign_str(driver);
                __entry->queue_index = queue_index;
        ),

        TP_printk("dev=%s driver=%s queue=%d",
                __get_str(name), __get_str(driver), __entry->queue_index)
);

DECLARE_EVENT_CLASS(net_dev_template,

        TP_PROTO(struct sk_buff *skb),

        TP_ARGS(skb),

        TP_STRUCT__entry(
                __field(        void *,                skbaddr                )
                __field(        unsigned int,        len                )
                __string(        name,                skb->dev->name        )
        ),

        TP_fast_assign(
                __entry->skbaddr = skb;
                __entry->len = skb->len;
                __assign_str(name);
        ),

        TP_printk("dev=%s skbaddr=%p len=%u",
                __get_str(name), __entry->skbaddr, __entry->len)
)

DEFINE_EVENT(net_dev_template, net_dev_queue,

        TP_PROTO(struct sk_buff *skb),

        TP_ARGS(skb)
);

DEFINE_EVENT(net_dev_template, netif_receive_skb,

        TP_PROTO(struct sk_buff *skb),

        TP_ARGS(skb)
);

DEFINE_EVENT(net_dev_template, netif_rx,

        TP_PROTO(struct sk_buff *skb),

        TP_ARGS(skb)
);

DECLARE_EVENT_CLASS(net_dev_rx_verbose_template,

        TP_PROTO(const struct sk_buff *skb),

        TP_ARGS(skb),

        TP_STRUCT__entry(
                __string(        name,                        skb->dev->name        )
                __field(        unsigned int,                napi_id                )
                __field(        u16,                        queue_mapping        )
                __field(        const void *,                skbaddr                )
                __field(        bool,                        vlan_tagged        )
                __field(        u16,                        vlan_proto        )
                __field(        u16,                        vlan_tci        )
                __field(        u16,                        protocol        )
                __field(        u8,                        ip_summed        )
                __field(        u32,                        hash                )
                __field(        bool,                        l4_hash                )
                __field(        unsigned int,                len                )
                __field(        unsigned int,                data_len        )
                __field(        unsigned int,                truesize        )
                __field(        bool,                        mac_header_valid)
                __field(        int,                        mac_header        )
                __field(        unsigned char,                nr_frags        )
                __field(        u16,                        gso_size        )
                __field(        u16,                        gso_type        )
        ),

        TP_fast_assign(
                __assign_str(name);
#ifdef CONFIG_NET_RX_BUSY_POLL
                __entry->napi_id = skb->napi_id;
#else
                __entry->napi_id = 0;
#endif
                __entry->queue_mapping = skb->queue_mapping;
                __entry->skbaddr = skb;
                __entry->vlan_tagged = skb_vlan_tag_present(skb);
                __entry->vlan_proto = ntohs(skb->vlan_proto);
                __entry->vlan_tci = skb_vlan_tag_get(skb);
                __entry->protocol = ntohs(skb->protocol);
                __entry->ip_summed = skb->ip_summed;
                __entry->hash = skb->hash;
                __entry->l4_hash = skb->l4_hash;
                __entry->len = skb->len;
                __entry->data_len = skb->data_len;
                __entry->truesize = skb->truesize;
                __entry->mac_header_valid = skb_mac_header_was_set(skb);
                __entry->mac_header = skb_mac_header(skb) - skb->data;
                __entry->nr_frags = skb_shinfo(skb)->nr_frags;
                __entry->gso_size = skb_shinfo(skb)->gso_size;
                __entry->gso_type = skb_shinfo(skb)->gso_type;
        ),

        TP_printk("dev=%s napi_id=%#x queue_mapping=%u skbaddr=%p vlan_tagged=%d vlan_proto=0x%04x vlan_tci=0x%04x protocol=0x%04x ip_summed=%d hash=0x%08x l4_hash=%d len=%u data_len=%u truesize=%u mac_header_valid=%d mac_header=%d nr_frags=%d gso_size=%d gso_type=%#x",
                  __get_str(name), __entry->napi_id, __entry->queue_mapping,
                  __entry->skbaddr, __entry->vlan_tagged, __entry->vlan_proto,
                  __entry->vlan_tci, __entry->protocol, __entry->ip_summed,
                  __entry->hash, __entry->l4_hash, __entry->len,
                  __entry->data_len, __entry->truesize,
                  __entry->mac_header_valid, __entry->mac_header,
                  __entry->nr_frags, __entry->gso_size, __entry->gso_type)
);

DEFINE_EVENT(net_dev_rx_verbose_template, napi_gro_frags_entry,

        TP_PROTO(const struct sk_buff *skb),

        TP_ARGS(skb)
);

DEFINE_EVENT(net_dev_rx_verbose_template, napi_gro_receive_entry,

        TP_PROTO(const struct sk_buff *skb),

        TP_ARGS(skb)
);

DEFINE_EVENT(net_dev_rx_verbose_template, netif_receive_skb_entry,

        TP_PROTO(const struct sk_buff *skb),

        TP_ARGS(skb)
);

DEFINE_EVENT(net_dev_rx_verbose_template, netif_receive_skb_list_entry,

        TP_PROTO(const struct sk_buff *skb),

        TP_ARGS(skb)
);

DEFINE_EVENT(net_dev_rx_verbose_template, netif_rx_entry,

        TP_PROTO(const struct sk_buff *skb),

        TP_ARGS(skb)
);

DECLARE_EVENT_CLASS(net_dev_rx_exit_template,

        TP_PROTO(int ret),

        TP_ARGS(ret),

        TP_STRUCT__entry(
                __field(int,        ret)
        ),

        TP_fast_assign(
                __entry->ret = ret;
        ),

        TP_printk("ret=%d", __entry->ret)
);

DEFINE_EVENT(net_dev_rx_exit_template, napi_gro_frags_exit,

        TP_PROTO(int ret),

        TP_ARGS(ret)
);

DEFINE_EVENT(net_dev_rx_exit_template, napi_gro_receive_exit,

        TP_PROTO(int ret),

        TP_ARGS(ret)
);

DEFINE_EVENT(net_dev_rx_exit_template, netif_receive_skb_exit,

        TP_PROTO(int ret),

        TP_ARGS(ret)
);

DEFINE_EVENT(net_dev_rx_exit_template, netif_rx_exit,

        TP_PROTO(int ret),

        TP_ARGS(ret)
);

DEFINE_EVENT(net_dev_rx_exit_template, netif_receive_skb_list_exit,

        TP_PROTO(int ret),

        TP_ARGS(ret)
);

#endif /* _TRACE_NET_H */

/* This part must be outside protection */
#include <trace/define_trace.h>




































 27094 




 20154 
 1321 



1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_CONNTRACK_COMMON_H
#define _NF_CONNTRACK_COMMON_H

#include <linux/refcount.h>
#include <uapi/linux/netfilter/nf_conntrack_common.h>

struct ip_conntrack_stat {
        unsigned int found;
        unsigned int invalid;
        unsigned int insert;
        unsigned int insert_failed;
        unsigned int clash_resolve;
        unsigned int drop;
        unsigned int early_drop;
        unsigned int error;
        unsigned int expect_new;
        unsigned int expect_create;
        unsigned int expect_delete;
        unsigned int search_restart;
        unsigned int chaintoolong;
};

#define NFCT_INFOMASK        7UL
#define NFCT_PTRMASK        ~(NFCT_INFOMASK)

struct nf_conntrack {
        refcount_t use;
};

void nf_conntrack_destroy(struct nf_conntrack *nfct);

/* like nf_ct_put, but without module dependency on nf_conntrack */
static inline void nf_conntrack_put(struct nf_conntrack *nfct)
{
        if (nfct && refcount_dec_and_test(&nfct->use))
                nf_conntrack_destroy(nfct);
}
static inline void nf_conntrack_get(struct nf_conntrack *nfct)
{
        if (nfct)
                refcount_inc(&nfct->use);
}

#endif /* _NF_CONNTRACK_COMMON_H */




































































































































































































































   27 







   20 


   14 




   27 
   27 
   14 

   22 













   19 


   14 




   27 

   26 

   27 

   27 

   27 

   27 
   27 






  263 
  260 
  259 










   34 











    6 


   29 


   15 
   15 







   15 



   15 
   15 


   15 

   15 



   15 










    3 




    1 
    2 




    1 







    6 





    6 

    6 


    6 





   15 


    1 


   14 







    2 























    7 


    4 
    4 

    7 

    7 


















   12 



   89 


   12 

    4 




   12 



   12 
   12 


   12 

    1 


    1 

    2 

    1 
    1 



    3 






    2 


















   11 


   13 





   11 





   13 





















    4 









    4 
    4 

    2 






    4 


    4 























   11 



   11 



   11 



   11 



   11 
   11 





   11 















   17 




    3 




    1 











   11 
   11 



    4 
    3 





    9 
   13 







    1 




   12 












































































   89 






   89 















    8 

















    8 

    8 


    8 

    8 


    8 
    7 

    7 
    4 




























    6 





    6 

    5 
    5 
    1 





  229 




    1 

  199 

   35 







   35 






  156 



  190 


  226 
   28 




















1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
// SPDX-License-Identifier: GPL-2.0
/*
 * consolemap.c
 *
 * Mapping from internal code (such as Latin-1 or Unicode or IBM PC code)
 * to font positions.
 *
 * aeb, 950210
 *
 * Support for multiple unimaps by Jakub Jelinek <jj@ultra.linux.cz>, July 1998
 *
 * Fix bug in inverse translation. Stanislav Voronyi <stas@cnti.uanet.kharkov.ua>, Dec 1998
 *
 * In order to prevent the following circular lock dependency:
 *   &mm->mmap_lock --> cpu_hotplug.lock --> console_lock --> &mm->mmap_lock
 *
 * We cannot allow page fault to happen while holding the console_lock.
 * Therefore, all the userspace copy operations have to be done outside
 * the console_lock critical sections.
 *
 * As all the affected functions are all called directly from vt_ioctl(), we
 * can allocate some small buffers directly on stack without worrying about
 * stack overflow.
 */

#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/module.h>
#include <linux/kd.h>
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/uaccess.h>
#include <linux/console.h>
#include <linux/consolemap.h>
#include <linux/vt_kern.h>
#include <linux/string.h>

static unsigned short translations[][E_TABSZ] = {
  /* 8-bit Latin-1 mapped to Unicode -- trivial mapping */
  [LAT1_MAP] = {
    0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
    0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
    0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
    0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
    0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
    0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
    0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
    0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
    0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
    0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
    0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
    0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
    0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
    0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
    0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
    0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
    0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
    0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
    0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
    0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
  },
  /* VT100 graphics mapped to Unicode */
  [GRAF_MAP] = {
    0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
    0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
    0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
    0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x2192, 0x2190, 0x2191, 0x2193, 0x002f,
    0x2588, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x00a0,
    0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1,
    0x2591, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba,
    0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c,
    0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7, 0x007f,
    0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
    0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
    0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
    0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
    0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
    0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
    0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
    0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
    0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
    0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
    0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
    0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
    0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7,
    0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef,
    0x00f0, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
    0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x00fe, 0x00ff
  },
  /* IBM Codepage 437 mapped to Unicode */
  [IBMPC_MAP] = {
    0x0000, 0x263a, 0x263b, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
    0x25d8, 0x25cb, 0x25d9, 0x2642, 0x2640, 0x266a, 0x266b, 0x263c,
    0x25b6, 0x25c0, 0x2195, 0x203c, 0x00b6, 0x00a7, 0x25ac, 0x21a8,
    0x2191, 0x2193, 0x2192, 0x2190, 0x221f, 0x2194, 0x25b2, 0x25bc,
    0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
    0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
    0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
    0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
    0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
    0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
    0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
    0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
    0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
    0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
    0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
    0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
    0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
    0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
    0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
    0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
    0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
    0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
    0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
    0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
    0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
    0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
    0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
    0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
    0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
    0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
    0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
    0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
  },
  /* User mapping -- default to codes for direct font mapping */
  [USER_MAP] = {
    0xf000, 0xf001, 0xf002, 0xf003, 0xf004, 0xf005, 0xf006, 0xf007,
    0xf008, 0xf009, 0xf00a, 0xf00b, 0xf00c, 0xf00d, 0xf00e, 0xf00f,
    0xf010, 0xf011, 0xf012, 0xf013, 0xf014, 0xf015, 0xf016, 0xf017,
    0xf018, 0xf019, 0xf01a, 0xf01b, 0xf01c, 0xf01d, 0xf01e, 0xf01f,
    0xf020, 0xf021, 0xf022, 0xf023, 0xf024, 0xf025, 0xf026, 0xf027,
    0xf028, 0xf029, 0xf02a, 0xf02b, 0xf02c, 0xf02d, 0xf02e, 0xf02f,
    0xf030, 0xf031, 0xf032, 0xf033, 0xf034, 0xf035, 0xf036, 0xf037,
    0xf038, 0xf039, 0xf03a, 0xf03b, 0xf03c, 0xf03d, 0xf03e, 0xf03f,
    0xf040, 0xf041, 0xf042, 0xf043, 0xf044, 0xf045, 0xf046, 0xf047,
    0xf048, 0xf049, 0xf04a, 0xf04b, 0xf04c, 0xf04d, 0xf04e, 0xf04f,
    0xf050, 0xf051, 0xf052, 0xf053, 0xf054, 0xf055, 0xf056, 0xf057,
    0xf058, 0xf059, 0xf05a, 0xf05b, 0xf05c, 0xf05d, 0xf05e, 0xf05f,
    0xf060, 0xf061, 0xf062, 0xf063, 0xf064, 0xf065, 0xf066, 0xf067,
    0xf068, 0xf069, 0xf06a, 0xf06b, 0xf06c, 0xf06d, 0xf06e, 0xf06f,
    0xf070, 0xf071, 0xf072, 0xf073, 0xf074, 0xf075, 0xf076, 0xf077,
    0xf078, 0xf079, 0xf07a, 0xf07b, 0xf07c, 0xf07d, 0xf07e, 0xf07f,
    0xf080, 0xf081, 0xf082, 0xf083, 0xf084, 0xf085, 0xf086, 0xf087,
    0xf088, 0xf089, 0xf08a, 0xf08b, 0xf08c, 0xf08d, 0xf08e, 0xf08f,
    0xf090, 0xf091, 0xf092, 0xf093, 0xf094, 0xf095, 0xf096, 0xf097,
    0xf098, 0xf099, 0xf09a, 0xf09b, 0xf09c, 0xf09d, 0xf09e, 0xf09f,
    0xf0a0, 0xf0a1, 0xf0a2, 0xf0a3, 0xf0a4, 0xf0a5, 0xf0a6, 0xf0a7,
    0xf0a8, 0xf0a9, 0xf0aa, 0xf0ab, 0xf0ac, 0xf0ad, 0xf0ae, 0xf0af,
    0xf0b0, 0xf0b1, 0xf0b2, 0xf0b3, 0xf0b4, 0xf0b5, 0xf0b6, 0xf0b7,
    0xf0b8, 0xf0b9, 0xf0ba, 0xf0bb, 0xf0bc, 0xf0bd, 0xf0be, 0xf0bf,
    0xf0c0, 0xf0c1, 0xf0c2, 0xf0c3, 0xf0c4, 0xf0c5, 0xf0c6, 0xf0c7,
    0xf0c8, 0xf0c9, 0xf0ca, 0xf0cb, 0xf0cc, 0xf0cd, 0xf0ce, 0xf0cf,
    0xf0d0, 0xf0d1, 0xf0d2, 0xf0d3, 0xf0d4, 0xf0d5, 0xf0d6, 0xf0d7,
    0xf0d8, 0xf0d9, 0xf0da, 0xf0db, 0xf0dc, 0xf0dd, 0xf0de, 0xf0df,
    0xf0e0, 0xf0e1, 0xf0e2, 0xf0e3, 0xf0e4, 0xf0e5, 0xf0e6, 0xf0e7,
    0xf0e8, 0xf0e9, 0xf0ea, 0xf0eb, 0xf0ec, 0xf0ed, 0xf0ee, 0xf0ef,
    0xf0f0, 0xf0f1, 0xf0f2, 0xf0f3, 0xf0f4, 0xf0f5, 0xf0f6, 0xf0f7,
    0xf0f8, 0xf0f9, 0xf0fa, 0xf0fb, 0xf0fc, 0xf0fd, 0xf0fe, 0xf0ff
  }
};

/* The standard kernel character-to-font mappings are not invertible
   -- this is just a best effort. */

#define MAX_GLYPH 512                /* Max possible glyph value */

static enum translation_map inv_translate[MAX_NR_CONSOLES];

#define UNI_DIRS        32U
#define UNI_DIR_ROWS        32U
#define UNI_ROW_GLYPHS        64U

#define UNI_DIR_BITS                GENMASK(15, 11)
#define UNI_ROW_BITS                GENMASK(10,  6)
#define UNI_GLYPH_BITS                GENMASK( 5,  0)

#define UNI_DIR(uni)                FIELD_GET(UNI_DIR_BITS, (uni))
#define UNI_ROW(uni)                FIELD_GET(UNI_ROW_BITS, (uni))
#define UNI_GLYPH(uni)                FIELD_GET(UNI_GLYPH_BITS, (uni))

#define UNI(dir, row, glyph)        (FIELD_PREP(UNI_DIR_BITS, (dir)) | \
                                 FIELD_PREP(UNI_ROW_BITS, (row)) | \
                                 FIELD_PREP(UNI_GLYPH_BITS, (glyph)))

/**
 * struct uni_pagedict - unicode directory
 *
 * @uni_pgdir: 32*32*64 table with glyphs
 * @refcount: reference count of this structure
 * @sum: checksum
 * @inverse_translations: best-effort inverse mapping
 * @inverse_trans_unicode: best-effort inverse mapping to unicode
 */
struct uni_pagedict {
        u16                **uni_pgdir[UNI_DIRS];
        unsigned long        refcount;
        unsigned long        sum;
        unsigned char        *inverse_translations[LAST_MAP + 1];
        u16                *inverse_trans_unicode;
};

static struct uni_pagedict *dflt;

static void set_inverse_transl(struct vc_data *conp, struct uni_pagedict *dict,
               enum translation_map m)
{
        unsigned short *t = translations[m];
        unsigned char *inv;

        if (!dict)
                return;
        inv = dict->inverse_translations[m];

        if (!inv) {
                inv = dict->inverse_translations[m] = kmalloc(MAX_GLYPH,
                                GFP_KERNEL);
                if (!inv)
                        return;
        }
        memset(inv, 0, MAX_GLYPH);

        for (unsigned int ch = 0; ch < ARRAY_SIZE(translations[m]); ch++) {
                int glyph = conv_uni_to_pc(conp, t[ch]);
                if (glyph >= 0 && glyph < MAX_GLYPH && inv[glyph] < 32) {
                        /* prefer '-' above SHY etc. */
                        inv[glyph] = ch;
                }
        }
}

static void set_inverse_trans_unicode(struct uni_pagedict *dict)
{
        unsigned int d, r, g;
        u16 *inv;

        if (!dict)
                return;

        inv = dict->inverse_trans_unicode;
        if (!inv) {
                inv = dict->inverse_trans_unicode = kmalloc_array(MAX_GLYPH,
                                sizeof(*inv), GFP_KERNEL);
                if (!inv)
                        return;
        }
        memset(inv, 0, MAX_GLYPH * sizeof(*inv));

        for (d = 0; d < UNI_DIRS; d++) {
                u16 **dir = dict->uni_pgdir[d];
                if (!dir)
                        continue;
                for (r = 0; r < UNI_DIR_ROWS; r++) {
                        u16 *row = dir[r];
                        if (!row)
                                continue;
                        for (g = 0; g < UNI_ROW_GLYPHS; g++) {
                                u16 glyph = row[g];
                                if (glyph < MAX_GLYPH && inv[glyph] < 32)
                                        inv[glyph] = UNI(d, r, g);
                        }
                }
        }
}

unsigned short *set_translate(enum translation_map m, struct vc_data *vc)
{
        inv_translate[vc->vc_num] = m;
        return translations[m];
}

/*
 * Inverse translation is impossible for several reasons:
 * 1. The font<->character maps are not 1-1.
 * 2. The text may have been written while a different translation map
 *    was active.
 * Still, it is now possible to a certain extent to cut and paste non-ASCII.
 */
u16 inverse_translate(const struct vc_data *conp, u16 glyph, bool use_unicode)
{
        struct uni_pagedict *p;
        enum translation_map m;

        if (glyph >= MAX_GLYPH)
                return 0;

        p = *conp->uni_pagedict_loc;
        if (!p)
                return glyph;

        if (use_unicode) {
                if (!p->inverse_trans_unicode)
                        return glyph;

                return p->inverse_trans_unicode[glyph];
        }

        m = inv_translate[conp->vc_num];
        if (!p->inverse_translations[m])
                return glyph;

        return p->inverse_translations[m][glyph];
}
EXPORT_SYMBOL_GPL(inverse_translate);

static void update_user_maps(void)
{
        int i;
        struct uni_pagedict *p, *q = NULL;

        for (i = 0; i < MAX_NR_CONSOLES; i++) {
                if (!vc_cons_allocated(i))
                        continue;
                p = *vc_cons[i].d->uni_pagedict_loc;
                if (p && p != q) {
                        set_inverse_transl(vc_cons[i].d, p, USER_MAP);
                        set_inverse_trans_unicode(p);
                        q = p;
                }
        }
}

/*
 * Load customizable translation table
 * arg points to a 256 byte translation table.
 *
 * The "old" variants are for translation directly to font (using the
 * 0xf000-0xf0ff "transparent" Unicodes) whereas the "new" variants set
 * Unicodes explicitly.
 */
int con_set_trans_old(unsigned char __user * arg)
{
        unsigned short inbuf[E_TABSZ];
        unsigned int i;
        unsigned char ch;

        for (i = 0; i < ARRAY_SIZE(inbuf); i++) {
                if (get_user(ch, &arg[i]))
                        return -EFAULT;
                inbuf[i] = UNI_DIRECT_BASE | ch;
        }

        console_lock();
        memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
        update_user_maps();
        console_unlock();
        return 0;
}

int con_get_trans_old(unsigned char __user * arg)
{
        int i, ch;
        unsigned short *p = translations[USER_MAP];
        unsigned char outbuf[E_TABSZ];

        console_lock();
        for (i = 0; i < ARRAY_SIZE(outbuf); i++)
        {
                ch = conv_uni_to_pc(vc_cons[fg_console].d, p[i]);
                outbuf[i] = (ch & ~0xff) ? 0 : ch;
        }
        console_unlock();

        return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
}

int con_set_trans_new(ushort __user * arg)
{
        unsigned short inbuf[E_TABSZ];

        if (copy_from_user(inbuf, arg, sizeof(inbuf)))
                return -EFAULT;

        console_lock();
        memcpy(translations[USER_MAP], inbuf, sizeof(inbuf));
        update_user_maps();
        console_unlock();
        return 0;
}

int con_get_trans_new(ushort __user * arg)
{
        unsigned short outbuf[E_TABSZ];

        console_lock();
        memcpy(outbuf, translations[USER_MAP], sizeof(outbuf));
        console_unlock();

        return copy_to_user(arg, outbuf, sizeof(outbuf)) ? -EFAULT : 0;
}

/*
 * Unicode -> current font conversion
 *
 * A font has at most 512 chars, usually 256.
 * But one font position may represent several Unicode chars.
 * A hashtable is somewhat of a pain to deal with, so use a
 * "paged table" instead.  Simulation has shown the memory cost of
 * this 3-level paged table scheme to be comparable to a hash table.
 */

extern u8 dfont_unicount[];        /* Defined in console_defmap.c */
extern u16 dfont_unitable[];

static void con_release_unimap(struct uni_pagedict *dict)
{
        unsigned int d, r;

        if (dict == dflt)
                dflt = NULL;

        for (d = 0; d < UNI_DIRS; d++) {
                u16 **dir = dict->uni_pgdir[d];
                if (dir != NULL) {
                        for (r = 0; r < UNI_DIR_ROWS; r++)
                                kfree(dir[r]);
                        kfree(dir);
                }
                dict->uni_pgdir[d] = NULL;
        }

        for (r = 0; r < ARRAY_SIZE(dict->inverse_translations); r++) {
                kfree(dict->inverse_translations[r]);
                dict->inverse_translations[r] = NULL;
        }

        kfree(dict->inverse_trans_unicode);
        dict->inverse_trans_unicode = NULL;
}

/* Caller must hold the console lock */
void con_free_unimap(struct vc_data *vc)
{
        struct uni_pagedict *p;

        p = *vc->uni_pagedict_loc;
        if (!p)
                return;
        *vc->uni_pagedict_loc = NULL;
        if (--p->refcount)
                return;
        con_release_unimap(p);
        kfree(p);
}

static int con_unify_unimap(struct vc_data *conp, struct uni_pagedict *dict1)
{
        struct uni_pagedict *dict2;
        unsigned int cons, d, r;

        for (cons = 0; cons < MAX_NR_CONSOLES; cons++) {
                if (!vc_cons_allocated(cons))
                        continue;
                dict2 = *vc_cons[cons].d->uni_pagedict_loc;
                if (!dict2 || dict2 == dict1 || dict2->sum != dict1->sum)
                        continue;
                for (d = 0; d < UNI_DIRS; d++) {
                        u16 **dir1 = dict1->uni_pgdir[d];
                        u16 **dir2 = dict2->uni_pgdir[d];
                        if (!dir1 && !dir2)
                                continue;
                        if (!dir1 || !dir2)
                                break;
                        for (r = 0; r < UNI_DIR_ROWS; r++) {
                                if (!dir1[r] && !dir2[r])
                                        continue;
                                if (!dir1[r] || !dir2[r])
                                        break;
                                if (memcmp(dir1[r], dir2[r], UNI_ROW_GLYPHS *
                                                        sizeof(*dir1[r])))
                                        break;
                        }
                        if (r < UNI_DIR_ROWS)
                                break;
                }
                if (d == UNI_DIRS) {
                        dict2->refcount++;
                        *conp->uni_pagedict_loc = dict2;
                        con_release_unimap(dict1);
                        kfree(dict1);
                        return 1;
                }
        }
        return 0;
}

static int
con_insert_unipair(struct uni_pagedict *p, u_short unicode, u_short fontpos)
{
        u16 **dir, *row;
        unsigned int n;

        n = UNI_DIR(unicode);
        dir = p->uni_pgdir[n];
        if (!dir) {
                dir = p->uni_pgdir[n] = kcalloc(UNI_DIR_ROWS, sizeof(*dir),
                                GFP_KERNEL);
                if (!dir)
                        return -ENOMEM;
        }

        n = UNI_ROW(unicode);
        row = dir[n];
        if (!row) {
                row = dir[n] = kmalloc_array(UNI_ROW_GLYPHS, sizeof(*row),
                                GFP_KERNEL);
                if (!row)
                        return -ENOMEM;
                /* No glyphs for the characters (yet) */
                memset(row, 0xff, UNI_ROW_GLYPHS * sizeof(*row));
        }

        row[UNI_GLYPH(unicode)] = fontpos;

        p->sum += (fontpos << 20U) + unicode;

        return 0;
}

static int con_allocate_new(struct vc_data *vc)
{
        struct uni_pagedict *new, *old = *vc->uni_pagedict_loc;

        new = kzalloc(sizeof(*new), GFP_KERNEL);
        if (!new)
                return -ENOMEM;

        new->refcount = 1;
        *vc->uni_pagedict_loc = new;

        if (old)
                old->refcount--;

        return 0;
}

/* Caller must hold the lock */
static int con_do_clear_unimap(struct vc_data *vc)
{
        struct uni_pagedict *old = *vc->uni_pagedict_loc;

        if (!old || old->refcount > 1)
                return con_allocate_new(vc);

        old->sum = 0;
        con_release_unimap(old);

        return 0;
}

int con_clear_unimap(struct vc_data *vc)
{
        int ret;
        console_lock();
        ret = con_do_clear_unimap(vc);
        console_unlock();
        return ret;
}

static struct uni_pagedict *con_unshare_unimap(struct vc_data *vc,
                struct uni_pagedict *old)
{
        struct uni_pagedict *new;
        unsigned int d, r, g;
        int ret;
        u16 uni = 0;

        ret = con_allocate_new(vc);
        if (ret)
                return ERR_PTR(ret);

        new = *vc->uni_pagedict_loc;

        /*
         * uni_pgdir is a 32*32*64 table with rows allocated when its first
         * entry is added. The unicode value must still be incremented for
         * empty rows. We are copying entries from "old" to "new".
         */
        for (d = 0; d < UNI_DIRS; d++) {
                u16 **dir = old->uni_pgdir[d];
                if (!dir) {
                        /* Account for empty table */
                        uni += UNI_DIR_ROWS * UNI_ROW_GLYPHS;
                        continue;
                }

                for (r = 0; r < UNI_DIR_ROWS; r++) {
                        u16 *row = dir[r];
                        if (!row) {
                                /* Account for row of 64 empty entries */
                                uni += UNI_ROW_GLYPHS;
                                continue;
                        }

                        for (g = 0; g < UNI_ROW_GLYPHS; g++, uni++) {
                                if (row[g] == 0xffff)
                                        continue;
                                /*
                                 * Found one, copy entry for unicode uni with
                                 * fontpos value row[g].
                                 */
                                ret = con_insert_unipair(new, uni, row[g]);
                                if (ret) {
                                        old->refcount++;
                                        *vc->uni_pagedict_loc = old;
                                        con_release_unimap(new);
                                        kfree(new);
                                        return ERR_PTR(ret);
                                }
                        }
                }
        }

        return new;
}

int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
{
        int err = 0, err1;
        struct uni_pagedict *dict;
        struct unipair *unilist, *plist;

        if (!ct)
                return 0;

        unilist = vmemdup_array_user(list, ct, sizeof(*unilist));
        if (IS_ERR(unilist))
                return PTR_ERR(unilist);

        console_lock();

        /* Save original vc_unipagdir_loc in case we allocate a new one */
        dict = *vc->uni_pagedict_loc;
        if (!dict) {
                err = -EINVAL;
                goto out_unlock;
        }

        if (dict->refcount > 1) {
                dict = con_unshare_unimap(vc, dict);
                if (IS_ERR(dict)) {
                        err = PTR_ERR(dict);
                        goto out_unlock;
                }
        } else if (dict == dflt) {
                dflt = NULL;
        }

        /*
         * Insert user specified unicode pairs into new table.
         */
        for (plist = unilist; ct; ct--, plist++) {
                err1 = con_insert_unipair(dict, plist->unicode, plist->fontpos);
                if (err1)
                        err = err1;
        }

        /*
         * Merge with fontmaps of any other virtual consoles.
         */
        if (con_unify_unimap(vc, dict))
                goto out_unlock;

        for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++)
                set_inverse_transl(vc, dict, m);
        set_inverse_trans_unicode(dict);

out_unlock:
        console_unlock();
        kvfree(unilist);
        return err;
}

/**
 *        con_set_default_unimap        -        set default unicode map
 *        @vc: the console we are updating
 *
 *        Loads the unimap for the hardware font, as defined in uni_hash.tbl.
 *        The representation used was the most compact I could come up
 *        with.  This routine is executed at video setup, and when the
 *        PIO_FONTRESET ioctl is called.
 *
 *        The caller must hold the console lock
 */
int con_set_default_unimap(struct vc_data *vc)
{
        struct uni_pagedict *dict;
        unsigned int fontpos, count;
        int err = 0, err1;
        u16 *dfont;

        if (dflt) {
                dict = *vc->uni_pagedict_loc;
                if (dict == dflt)
                        return 0;

                dflt->refcount++;
                *vc->uni_pagedict_loc = dflt;
                if (dict && !--dict->refcount) {
                        con_release_unimap(dict);
                        kfree(dict);
                }
                return 0;
        }

        /* The default font is always 256 characters */

        err = con_do_clear_unimap(vc);
        if (err)
                return err;

        dict = *vc->uni_pagedict_loc;
        dfont = dfont_unitable;

        for (fontpos = 0; fontpos < 256U; fontpos++)
                for (count = dfont_unicount[fontpos]; count; count--) {
                        err1 = con_insert_unipair(dict, *(dfont++), fontpos);
                        if (err1)
                                err = err1;
                }

        if (con_unify_unimap(vc, dict)) {
                dflt = *vc->uni_pagedict_loc;
                return err;
        }

        for (enum translation_map m = FIRST_MAP; m <= LAST_MAP; m++)
                set_inverse_transl(vc, dict, m);
        set_inverse_trans_unicode(dict);
        dflt = dict;
        return err;
}
EXPORT_SYMBOL(con_set_default_unimap);

/**
 *        con_copy_unimap                -        copy unimap between two vts
 *        @dst_vc: target
 *        @src_vc: source
 *
 *        The caller must hold the console lock when invoking this method
 */
int con_copy_unimap(struct vc_data *dst_vc, struct vc_data *src_vc)
{
        struct uni_pagedict *src;

        if (!*src_vc->uni_pagedict_loc)
                return -EINVAL;
        if (*dst_vc->uni_pagedict_loc == *src_vc->uni_pagedict_loc)
                return 0;
        con_free_unimap(dst_vc);
        src = *src_vc->uni_pagedict_loc;
        src->refcount++;
        *dst_vc->uni_pagedict_loc = src;
        return 0;
}
EXPORT_SYMBOL(con_copy_unimap);

/*
 *        con_get_unimap                -        get the unicode map
 *
 *        Read the console unicode data for this console. Called from the ioctl
 *        handlers.
 */
int con_get_unimap(struct vc_data *vc, ushort ct, ushort __user *uct,
                struct unipair __user *list)
{
        ushort ect;
        struct uni_pagedict *dict;
        struct unipair *unilist;
        unsigned int d, r, g;
        int ret = 0;

        unilist = kvmalloc_array(ct, sizeof(*unilist), GFP_KERNEL);
        if (!unilist)
                return -ENOMEM;

        console_lock();

        ect = 0;
        dict = *vc->uni_pagedict_loc;
        if (!dict)
                goto unlock;

        for (d = 0; d < UNI_DIRS; d++) {
                u16 **dir = dict->uni_pgdir[d];
                if (!dir)
                        continue;

                for (r = 0; r < UNI_DIR_ROWS; r++) {
                        u16 *row = dir[r];
                        if (!row)
                                continue;

                        for (g = 0; g < UNI_ROW_GLYPHS; g++, row++) {
                                if (*row >= MAX_GLYPH)
                                        continue;
                                if (ect < ct) {
                                        unilist[ect].unicode = UNI(d, r, g);
                                        unilist[ect].fontpos = *row;
                                }
                                ect++;
                        }
                }
        }
unlock:
        console_unlock();
        if (copy_to_user(list, unilist, min(ect, ct) * sizeof(*unilist)))
                ret = -EFAULT;
        if (put_user(ect, uct))
                ret = -EFAULT;
        kvfree(unilist);
        return ret ? ret : (ect <= ct) ? 0 : -ENOMEM;
}

/*
 * Always use USER_MAP. These functions are used by the keyboard,
 * which shouldn't be affected by G0/G1 switching, etc.
 * If the user map still contains default values, i.e. the
 * direct-to-font mapping, then assume user is using Latin1.
 *
 * FIXME: at some point we need to decide if we want to lock the table
 * update element itself via the keyboard_event_lock for consistency with the
 * keyboard driver as well as the consoles
 */
/* may be called during an interrupt */
u32 conv_8bit_to_uni(unsigned char c)
{
        unsigned short uni = translations[USER_MAP][c];
        return uni == (0xf000 | c) ? c : uni;
}

int conv_uni_to_8bit(u32 uni)
{
        int c;
        for (c = 0; c < ARRAY_SIZE(translations[USER_MAP]); c++)
                if (translations[USER_MAP][c] == uni ||
                   (translations[USER_MAP][c] == (c | 0xf000) && uni == c))
                        return c;
        return -1;
}

int conv_uni_to_pc(struct vc_data *conp, long ucs)
{
        struct uni_pagedict *dict;
        u16 **dir, *row, glyph;

        /* Only 16-bit codes supported at this time */
        if (ucs > 0xffff)
                return -4;                /* Not found */
        else if (ucs < 0x20)
                return -1;                /* Not a printable character */
        else if (ucs == 0xfeff || (ucs >= 0x200b && ucs <= 0x200f))
                return -2;                        /* Zero-width space */
        /*
         * UNI_DIRECT_BASE indicates the start of the region in the User Zone
         * which always has a 1:1 mapping to the currently loaded font.  The
         * UNI_DIRECT_MASK indicates the bit span of the region.
         */
        else if ((ucs & ~UNI_DIRECT_MASK) == UNI_DIRECT_BASE)
                return ucs & UNI_DIRECT_MASK;

        dict = *conp->uni_pagedict_loc;
        if (!dict)
                return -3;

        dir = dict->uni_pgdir[UNI_DIR(ucs)];
        if (!dir)
                return -4;

        row = dir[UNI_ROW(ucs)];
        if (!row)
                return -4;

        glyph = row[UNI_GLYPH(ucs)];
        if (glyph >= MAX_GLYPH)
                return -4;

        return glyph;
}

/*
 * This is called at sys_setup time, after memory and the console are
 * initialized.  It must be possible to call kmalloc(..., GFP_KERNEL)
 * from this function, hence the call from sys_setup.
 */
void __init
console_map_init(void)
{
        int i;

        for (i = 0; i < MAX_NR_CONSOLES; i++)
                if (vc_cons_allocated(i) && !*vc_cons[i].d->uni_pagedict_loc)
                        con_set_default_unimap(vc_cons[i].d);
}




























    2 

    2 








    4 













    6 




    3 


    4 





    6 




    9 



    4 
    2 
    3 























































































    4 


    4 




    5 


    5 






    2 





    2 




















    3 




    5 







    5 












































































































































































    8 





























    8 



    8 



    8 




    8 





    7 
    1 













    4 







    4 













    8 











    1 


    7 


















    1 





















    3 




    3 

















































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
 */

#include "devl_internal.h"

static inline bool
devlink_rate_is_leaf(struct devlink_rate *devlink_rate)
{
        return devlink_rate->type == DEVLINK_RATE_TYPE_LEAF;
}

static inline bool
devlink_rate_is_node(struct devlink_rate *devlink_rate)
{
        return devlink_rate->type == DEVLINK_RATE_TYPE_NODE;
}

static struct devlink_rate *
devlink_rate_leaf_get_from_info(struct devlink *devlink, struct genl_info *info)
{
        struct devlink_rate *devlink_rate;
        struct devlink_port *devlink_port;

        devlink_port = devlink_port_get_from_attrs(devlink, info->attrs);
        if (IS_ERR(devlink_port))
                return ERR_CAST(devlink_port);
        devlink_rate = devlink_port->devlink_rate;
        return devlink_rate ?: ERR_PTR(-ENODEV);
}

static struct devlink_rate *
devlink_rate_node_get_by_name(struct devlink *devlink, const char *node_name)
{
        static struct devlink_rate *devlink_rate;

        list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
                if (devlink_rate_is_node(devlink_rate) &&
                    !strcmp(node_name, devlink_rate->name))
                        return devlink_rate;
        }
        return ERR_PTR(-ENODEV);
}

static struct devlink_rate *
devlink_rate_node_get_from_attrs(struct devlink *devlink, struct nlattr **attrs)
{
        const char *rate_node_name;
        size_t len;

        if (!attrs[DEVLINK_ATTR_RATE_NODE_NAME])
                return ERR_PTR(-EINVAL);
        rate_node_name = nla_data(attrs[DEVLINK_ATTR_RATE_NODE_NAME]);
        len = strlen(rate_node_name);
        /* Name cannot be empty or decimal number */
        if (!len || strspn(rate_node_name, "0123456789") == len)
                return ERR_PTR(-EINVAL);

        return devlink_rate_node_get_by_name(devlink, rate_node_name);
}

static struct devlink_rate *
devlink_rate_node_get_from_info(struct devlink *devlink, struct genl_info *info)
{
        return devlink_rate_node_get_from_attrs(devlink, info->attrs);
}

static struct devlink_rate *
devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info)
{
        struct nlattr **attrs = info->attrs;

        if (attrs[DEVLINK_ATTR_PORT_INDEX])
                return devlink_rate_leaf_get_from_info(devlink, info);
        else if (attrs[DEVLINK_ATTR_RATE_NODE_NAME])
                return devlink_rate_node_get_from_info(devlink, info);
        else
                return ERR_PTR(-EINVAL);
}

static int devlink_nl_rate_fill(struct sk_buff *msg,
                                struct devlink_rate *devlink_rate,
                                enum devlink_command cmd, u32 portid, u32 seq,
                                int flags, struct netlink_ext_ack *extack)
{
        struct devlink *devlink = devlink_rate->devlink;
        void *hdr;

        hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
        if (!hdr)
                return -EMSGSIZE;

        if (devlink_nl_put_handle(msg, devlink))
                goto nla_put_failure;

        if (nla_put_u16(msg, DEVLINK_ATTR_RATE_TYPE, devlink_rate->type))
                goto nla_put_failure;

        if (devlink_rate_is_leaf(devlink_rate)) {
                if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX,
                                devlink_rate->devlink_port->index))
                        goto nla_put_failure;
        } else if (devlink_rate_is_node(devlink_rate)) {
                if (nla_put_string(msg, DEVLINK_ATTR_RATE_NODE_NAME,
                                   devlink_rate->name))
                        goto nla_put_failure;
        }

        if (nla_put_u64_64bit(msg, DEVLINK_ATTR_RATE_TX_SHARE,
                              devlink_rate->tx_share, DEVLINK_ATTR_PAD))
                goto nla_put_failure;

        if (nla_put_u64_64bit(msg, DEVLINK_ATTR_RATE_TX_MAX,
                              devlink_rate->tx_max, DEVLINK_ATTR_PAD))
                goto nla_put_failure;

        if (nla_put_u32(msg, DEVLINK_ATTR_RATE_TX_PRIORITY,
                        devlink_rate->tx_priority))
                goto nla_put_failure;

        if (nla_put_u32(msg, DEVLINK_ATTR_RATE_TX_WEIGHT,
                        devlink_rate->tx_weight))
                goto nla_put_failure;

        if (devlink_rate->parent)
                if (nla_put_string(msg, DEVLINK_ATTR_RATE_PARENT_NODE_NAME,
                                   devlink_rate->parent->name))
                        goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return 0;

nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static void devlink_rate_notify(struct devlink_rate *devlink_rate,
                                enum devlink_command cmd)
{
        struct devlink *devlink = devlink_rate->devlink;
        struct sk_buff *msg;
        int err;

        WARN_ON(cmd != DEVLINK_CMD_RATE_NEW && cmd != DEVLINK_CMD_RATE_DEL);

        if (!devl_is_registered(devlink) || !devlink_nl_notify_need(devlink))
                return;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        err = devlink_nl_rate_fill(msg, devlink_rate, cmd, 0, 0, 0, NULL);
        if (err) {
                nlmsg_free(msg);
                return;
        }

        devlink_nl_notify_send(devlink, msg);
}

void devlink_rates_notify_register(struct devlink *devlink)
{
        struct devlink_rate *rate_node;

        list_for_each_entry(rate_node, &devlink->rate_list, list)
                devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW);
}

void devlink_rates_notify_unregister(struct devlink *devlink)
{
        struct devlink_rate *rate_node;

        list_for_each_entry_reverse(rate_node, &devlink->rate_list, list)
                devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_DEL);
}

static int
devlink_nl_rate_get_dump_one(struct sk_buff *msg, struct devlink *devlink,
                             struct netlink_callback *cb, int flags)
{
        struct devlink_nl_dump_state *state = devlink_dump_state(cb);
        struct devlink_rate *devlink_rate;
        int idx = 0;
        int err = 0;

        list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
                enum devlink_command cmd = DEVLINK_CMD_RATE_NEW;
                u32 id = NETLINK_CB(cb->skb).portid;

                if (idx < state->idx) {
                        idx++;
                        continue;
                }
                err = devlink_nl_rate_fill(msg, devlink_rate, cmd, id,
                                           cb->nlh->nlmsg_seq, flags, NULL);
                if (err) {
                        state->idx = idx;
                        break;
                }
                idx++;
        }

        return err;
}

int devlink_nl_rate_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
        return devlink_nl_dumpit(skb, cb, devlink_nl_rate_get_dump_one);
}

int devlink_nl_rate_get_doit(struct sk_buff *skb, struct genl_info *info)
{
        struct devlink *devlink = info->user_ptr[0];
        struct devlink_rate *devlink_rate;
        struct sk_buff *msg;
        int err;

        devlink_rate = devlink_rate_get_from_info(devlink, info);
        if (IS_ERR(devlink_rate))
                return PTR_ERR(devlink_rate);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        err = devlink_nl_rate_fill(msg, devlink_rate, DEVLINK_CMD_RATE_NEW,
                                   info->snd_portid, info->snd_seq, 0,
                                   info->extack);
        if (err) {
                nlmsg_free(msg);
                return err;
        }

        return genlmsg_reply(msg, info);
}

static bool
devlink_rate_is_parent_node(struct devlink_rate *devlink_rate,
                            struct devlink_rate *parent)
{
        while (parent) {
                if (parent == devlink_rate)
                        return true;
                parent = parent->parent;
        }
        return false;
}

static int
devlink_nl_rate_parent_node_set(struct devlink_rate *devlink_rate,
                                struct genl_info *info,
                                struct nlattr *nla_parent)
{
        struct devlink *devlink = devlink_rate->devlink;
        const char *parent_name = nla_data(nla_parent);
        const struct devlink_ops *ops = devlink->ops;
        size_t len = strlen(parent_name);
        struct devlink_rate *parent;
        int err = -EOPNOTSUPP;

        parent = devlink_rate->parent;

        if (parent && !len) {
                if (devlink_rate_is_leaf(devlink_rate))
                        err = ops->rate_leaf_parent_set(devlink_rate, NULL,
                                                        devlink_rate->priv, NULL,
                                                        info->extack);
                else if (devlink_rate_is_node(devlink_rate))
                        err = ops->rate_node_parent_set(devlink_rate, NULL,
                                                        devlink_rate->priv, NULL,
                                                        info->extack);
                if (err)
                        return err;

                refcount_dec(&parent->refcnt);
                devlink_rate->parent = NULL;
        } else if (len) {
                parent = devlink_rate_node_get_by_name(devlink, parent_name);
                if (IS_ERR(parent))
                        return -ENODEV;

                if (parent == devlink_rate) {
                        NL_SET_ERR_MSG(info->extack, "Parent to self is not allowed");
                        return -EINVAL;
                }

                if (devlink_rate_is_node(devlink_rate) &&
                    devlink_rate_is_parent_node(devlink_rate, parent->parent)) {
                        NL_SET_ERR_MSG(info->extack, "Node is already a parent of parent node.");
                        return -EEXIST;
                }

                if (devlink_rate_is_leaf(devlink_rate))
                        err = ops->rate_leaf_parent_set(devlink_rate, parent,
                                                        devlink_rate->priv, parent->priv,
                                                        info->extack);
                else if (devlink_rate_is_node(devlink_rate))
                        err = ops->rate_node_parent_set(devlink_rate, parent,
                                                        devlink_rate->priv, parent->priv,
                                                        info->extack);
                if (err)
                        return err;

                if (devlink_rate->parent)
                        /* we're reassigning to other parent in this case */
                        refcount_dec(&devlink_rate->parent->refcnt);

                refcount_inc(&parent->refcnt);
                devlink_rate->parent = parent;
        }

        return 0;
}

static int devlink_nl_rate_set(struct devlink_rate *devlink_rate,
                               const struct devlink_ops *ops,
                               struct genl_info *info)
{
        struct nlattr *nla_parent, **attrs = info->attrs;
        int err = -EOPNOTSUPP;
        u32 priority;
        u32 weight;
        u64 rate;

        if (attrs[DEVLINK_ATTR_RATE_TX_SHARE]) {
                rate = nla_get_u64(attrs[DEVLINK_ATTR_RATE_TX_SHARE]);
                if (devlink_rate_is_leaf(devlink_rate))
                        err = ops->rate_leaf_tx_share_set(devlink_rate, devlink_rate->priv,
                                                          rate, info->extack);
                else if (devlink_rate_is_node(devlink_rate))
                        err = ops->rate_node_tx_share_set(devlink_rate, devlink_rate->priv,
                                                          rate, info->extack);
                if (err)
                        return err;
                devlink_rate->tx_share = rate;
        }

        if (attrs[DEVLINK_ATTR_RATE_TX_MAX]) {
                rate = nla_get_u64(attrs[DEVLINK_ATTR_RATE_TX_MAX]);
                if (devlink_rate_is_leaf(devlink_rate))
                        err = ops->rate_leaf_tx_max_set(devlink_rate, devlink_rate->priv,
                                                        rate, info->extack);
                else if (devlink_rate_is_node(devlink_rate))
                        err = ops->rate_node_tx_max_set(devlink_rate, devlink_rate->priv,
                                                        rate, info->extack);
                if (err)
                        return err;
                devlink_rate->tx_max = rate;
        }

        if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY]) {
                priority = nla_get_u32(attrs[DEVLINK_ATTR_RATE_TX_PRIORITY]);
                if (devlink_rate_is_leaf(devlink_rate))
                        err = ops->rate_leaf_tx_priority_set(devlink_rate, devlink_rate->priv,
                                                             priority, info->extack);
                else if (devlink_rate_is_node(devlink_rate))
                        err = ops->rate_node_tx_priority_set(devlink_rate, devlink_rate->priv,
                                                             priority, info->extack);

                if (err)
                        return err;
                devlink_rate->tx_priority = priority;
        }

        if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT]) {
                weight = nla_get_u32(attrs[DEVLINK_ATTR_RATE_TX_WEIGHT]);
                if (devlink_rate_is_leaf(devlink_rate))
                        err = ops->rate_leaf_tx_weight_set(devlink_rate, devlink_rate->priv,
                                                           weight, info->extack);
                else if (devlink_rate_is_node(devlink_rate))
                        err = ops->rate_node_tx_weight_set(devlink_rate, devlink_rate->priv,
                                                           weight, info->extack);

                if (err)
                        return err;
                devlink_rate->tx_weight = weight;
        }

        nla_parent = attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME];
        if (nla_parent) {
                err = devlink_nl_rate_parent_node_set(devlink_rate, info,
                                                      nla_parent);
                if (err)
                        return err;
        }

        return 0;
}

static bool devlink_rate_set_ops_supported(const struct devlink_ops *ops,
                                           struct genl_info *info,
                                           enum devlink_rate_type type)
{
        struct nlattr **attrs = info->attrs;

        if (type == DEVLINK_RATE_TYPE_LEAF) {
                if (attrs[DEVLINK_ATTR_RATE_TX_SHARE] && !ops->rate_leaf_tx_share_set) {
                        NL_SET_ERR_MSG(info->extack, "TX share set isn't supported for the leafs");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_TX_MAX] && !ops->rate_leaf_tx_max_set) {
                        NL_SET_ERR_MSG(info->extack, "TX max set isn't supported for the leafs");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] &&
                    !ops->rate_leaf_parent_set) {
                        NL_SET_ERR_MSG(info->extack, "Parent set isn't supported for the leafs");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY] && !ops->rate_leaf_tx_priority_set) {
                        NL_SET_ERR_MSG_ATTR(info->extack,
                                            attrs[DEVLINK_ATTR_RATE_TX_PRIORITY],
                                            "TX priority set isn't supported for the leafs");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT] && !ops->rate_leaf_tx_weight_set) {
                        NL_SET_ERR_MSG_ATTR(info->extack,
                                            attrs[DEVLINK_ATTR_RATE_TX_WEIGHT],
                                            "TX weight set isn't supported for the leafs");
                        return false;
                }
        } else if (type == DEVLINK_RATE_TYPE_NODE) {
                if (attrs[DEVLINK_ATTR_RATE_TX_SHARE] && !ops->rate_node_tx_share_set) {
                        NL_SET_ERR_MSG(info->extack, "TX share set isn't supported for the nodes");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_TX_MAX] && !ops->rate_node_tx_max_set) {
                        NL_SET_ERR_MSG(info->extack, "TX max set isn't supported for the nodes");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_PARENT_NODE_NAME] &&
                    !ops->rate_node_parent_set) {
                        NL_SET_ERR_MSG(info->extack, "Parent set isn't supported for the nodes");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_TX_PRIORITY] && !ops->rate_node_tx_priority_set) {
                        NL_SET_ERR_MSG_ATTR(info->extack,
                                            attrs[DEVLINK_ATTR_RATE_TX_PRIORITY],
                                            "TX priority set isn't supported for the nodes");
                        return false;
                }
                if (attrs[DEVLINK_ATTR_RATE_TX_WEIGHT] && !ops->rate_node_tx_weight_set) {
                        NL_SET_ERR_MSG_ATTR(info->extack,
                                            attrs[DEVLINK_ATTR_RATE_TX_WEIGHT],
                                            "TX weight set isn't supported for the nodes");
                        return false;
                }
        } else {
                WARN(1, "Unknown type of rate object");
                return false;
        }

        return true;
}

int devlink_nl_rate_set_doit(struct sk_buff *skb, struct genl_info *info)
{
        struct devlink *devlink = info->user_ptr[0];
        struct devlink_rate *devlink_rate;
        const struct devlink_ops *ops;
        int err;

        devlink_rate = devlink_rate_get_from_info(devlink, info);
        if (IS_ERR(devlink_rate))
                return PTR_ERR(devlink_rate);

        ops = devlink->ops;
        if (!ops || !devlink_rate_set_ops_supported(ops, info, devlink_rate->type))
                return -EOPNOTSUPP;

        err = devlink_nl_rate_set(devlink_rate, ops, info);

        if (!err)
                devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW);
        return err;
}

int devlink_nl_rate_new_doit(struct sk_buff *skb, struct genl_info *info)
{
        struct devlink *devlink = info->user_ptr[0];
        struct devlink_rate *rate_node;
        const struct devlink_ops *ops;
        int err;

        ops = devlink->ops;
        if (!ops || !ops->rate_node_new || !ops->rate_node_del) {
                NL_SET_ERR_MSG(info->extack, "Rate nodes aren't supported");
                return -EOPNOTSUPP;
        }

        if (!devlink_rate_set_ops_supported(ops, info, DEVLINK_RATE_TYPE_NODE))
                return -EOPNOTSUPP;

        rate_node = devlink_rate_node_get_from_attrs(devlink, info->attrs);
        if (!IS_ERR(rate_node))
                return -EEXIST;
        else if (rate_node == ERR_PTR(-EINVAL))
                return -EINVAL;

        rate_node = kzalloc(sizeof(*rate_node), GFP_KERNEL);
        if (!rate_node)
                return -ENOMEM;

        rate_node->devlink = devlink;
        rate_node->type = DEVLINK_RATE_TYPE_NODE;
        rate_node->name = nla_strdup(info->attrs[DEVLINK_ATTR_RATE_NODE_NAME], GFP_KERNEL);
        if (!rate_node->name) {
                err = -ENOMEM;
                goto err_strdup;
        }

        err = ops->rate_node_new(rate_node, &rate_node->priv, info->extack);
        if (err)
                goto err_node_new;

        err = devlink_nl_rate_set(rate_node, ops, info);
        if (err)
                goto err_rate_set;

        refcount_set(&rate_node->refcnt, 1);
        list_add(&rate_node->list, &devlink->rate_list);
        devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW);
        return 0;

err_rate_set:
        ops->rate_node_del(rate_node, rate_node->priv, info->extack);
err_node_new:
        kfree(rate_node->name);
err_strdup:
        kfree(rate_node);
        return err;
}

int devlink_nl_rate_del_doit(struct sk_buff *skb, struct genl_info *info)
{
        struct devlink *devlink = info->user_ptr[0];
        struct devlink_rate *rate_node;
        int err;

        rate_node = devlink_rate_node_get_from_info(devlink, info);
        if (IS_ERR(rate_node))
                return PTR_ERR(rate_node);

        if (refcount_read(&rate_node->refcnt) > 1) {
                NL_SET_ERR_MSG(info->extack, "Node has children. Cannot delete node.");
                return -EBUSY;
        }

        devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_DEL);
        err = devlink->ops->rate_node_del(rate_node, rate_node->priv,
                                          info->extack);
        if (rate_node->parent)
                refcount_dec(&rate_node->parent->refcnt);
        list_del(&rate_node->list);
        kfree(rate_node->name);
        kfree(rate_node);
        return err;
}

int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
                             struct netlink_ext_ack *extack)
{
        struct devlink_rate *devlink_rate;

        list_for_each_entry(devlink_rate, &devlink->rate_list, list)
                if (devlink_rate_is_node(devlink_rate)) {
                        NL_SET_ERR_MSG(extack, "Rate node(s) exists.");
                        return -EBUSY;
                }
        return 0;
}

/**
 * devl_rate_node_create - create devlink rate node
 * @devlink: devlink instance
 * @priv: driver private data
 * @node_name: name of the resulting node
 * @parent: parent devlink_rate struct
 *
 * Create devlink rate object of type node
 */
struct devlink_rate *
devl_rate_node_create(struct devlink *devlink, void *priv, char *node_name,
                      struct devlink_rate *parent)
{
        struct devlink_rate *rate_node;

        rate_node = devlink_rate_node_get_by_name(devlink, node_name);
        if (!IS_ERR(rate_node))
                return ERR_PTR(-EEXIST);

        rate_node = kzalloc(sizeof(*rate_node), GFP_KERNEL);
        if (!rate_node)
                return ERR_PTR(-ENOMEM);

        if (parent) {
                rate_node->parent = parent;
                refcount_inc(&rate_node->parent->refcnt);
        }

        rate_node->type = DEVLINK_RATE_TYPE_NODE;
        rate_node->devlink = devlink;
        rate_node->priv = priv;

        rate_node->name = kstrdup(node_name, GFP_KERNEL);
        if (!rate_node->name) {
                kfree(rate_node);
                return ERR_PTR(-ENOMEM);
        }

        refcount_set(&rate_node->refcnt, 1);
        list_add(&rate_node->list, &devlink->rate_list);
        devlink_rate_notify(rate_node, DEVLINK_CMD_RATE_NEW);
        return rate_node;
}
EXPORT_SYMBOL_GPL(devl_rate_node_create);

/**
 * devl_rate_leaf_create - create devlink rate leaf
 * @devlink_port: devlink port object to create rate object on
 * @priv: driver private data
 * @parent: parent devlink_rate struct
 *
 * Create devlink rate object of type leaf on provided @devlink_port.
 */
int devl_rate_leaf_create(struct devlink_port *devlink_port, void *priv,
                          struct devlink_rate *parent)
{
        struct devlink *devlink = devlink_port->devlink;
        struct devlink_rate *devlink_rate;

        devl_assert_locked(devlink_port->devlink);

        if (WARN_ON(devlink_port->devlink_rate))
                return -EBUSY;

        devlink_rate = kzalloc(sizeof(*devlink_rate), GFP_KERNEL);
        if (!devlink_rate)
                return -ENOMEM;

        if (parent) {
                devlink_rate->parent = parent;
                refcount_inc(&devlink_rate->parent->refcnt);
        }

        devlink_rate->type = DEVLINK_RATE_TYPE_LEAF;
        devlink_rate->devlink = devlink;
        devlink_rate->devlink_port = devlink_port;
        devlink_rate->priv = priv;
        list_add_tail(&devlink_rate->list, &devlink->rate_list);
        devlink_port->devlink_rate = devlink_rate;
        devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_NEW);

        return 0;
}
EXPORT_SYMBOL_GPL(devl_rate_leaf_create);

/**
 * devl_rate_leaf_destroy - destroy devlink rate leaf
 *
 * @devlink_port: devlink port linked to the rate object
 *
 * Destroy the devlink rate object of type leaf on provided @devlink_port.
 */
void devl_rate_leaf_destroy(struct devlink_port *devlink_port)
{
        struct devlink_rate *devlink_rate = devlink_port->devlink_rate;

        devl_assert_locked(devlink_port->devlink);
        if (!devlink_rate)
                return;

        devlink_rate_notify(devlink_rate, DEVLINK_CMD_RATE_DEL);
        if (devlink_rate->parent)
                refcount_dec(&devlink_rate->parent->refcnt);
        list_del(&devlink_rate->list);
        devlink_port->devlink_rate = NULL;
        kfree(devlink_rate);
}
EXPORT_SYMBOL_GPL(devl_rate_leaf_destroy);

/**
 * devl_rate_nodes_destroy - destroy all devlink rate nodes on device
 * @devlink: devlink instance
 *
 * Unset parent for all rate objects and destroy all rate nodes
 * on specified device.
 */
void devl_rate_nodes_destroy(struct devlink *devlink)
{
        static struct devlink_rate *devlink_rate, *tmp;
        const struct devlink_ops *ops = devlink->ops;

        devl_assert_locked(devlink);

        list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
                if (!devlink_rate->parent)
                        continue;

                refcount_dec(&devlink_rate->parent->refcnt);
                if (devlink_rate_is_leaf(devlink_rate))
                        ops->rate_leaf_parent_set(devlink_rate, NULL, devlink_rate->priv,
                                                  NULL, NULL);
                else if (devlink_rate_is_node(devlink_rate))
                        ops->rate_node_parent_set(devlink_rate, NULL, devlink_rate->priv,
                                                  NULL, NULL);
        }
        list_for_each_entry_safe(devlink_rate, tmp, &devlink->rate_list, list) {
                if (devlink_rate_is_node(devlink_rate)) {
                        ops->rate_node_del(devlink_rate, devlink_rate->priv, NULL);
                        list_del(&devlink_rate->list);
                        kfree(devlink_rate->name);
                        kfree(devlink_rate);
                }
        }
}
EXPORT_SYMBOL_GPL(devl_rate_nodes_destroy);






































































































































































































































































































































































































 10981 




















 6055 
























 5507 
 11923 
 6055 
 10981 


















 2136 

 1722 




























































  188 


  407 


  407 

  403 














 11923 



















































































































































 9638 







 2113 




























 2478 
  271 









 2502 
    1 











  315 

 2262 
 2266 


































 6894 










   74 
 1017 




  436 










 1227 














  271 
























 4630 






















































































 7371 
  591 
 7637 




 7030 





 7023 
 7036 
 5829 
 5668 
 7027 































 12119 

 12147 




   15 
  141 


  174 




 11954 





 11957 
 11950 
    1 
 11978 
 11944 




































































































































































































































































































































































































































































































 2471 

 2333 






















   26 
 4609 





  353 
  365 
  297 












 4862 
 4606 


























  172 

  171 
























































































   36 



  524 

















    4 












   55 









  632 







  525 





  525 

  525 
  525 































































































































 2362 





 2356 





















































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* memcontrol.h - Memory Controller
 *
 * Copyright IBM Corporation, 2007
 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
 *
 * Copyright 2007 OpenVZ SWsoft Inc
 * Author: Pavel Emelianov <xemul@openvz.org>
 */

#ifndef _LINUX_MEMCONTROL_H
#define _LINUX_MEMCONTROL_H
#include <linux/cgroup.h>
#include <linux/vm_event_item.h>
#include <linux/hardirq.h>
#include <linux/jump_label.h>
#include <linux/kernel.h>
#include <linux/page_counter.h>
#include <linux/vmpressure.h>
#include <linux/eventfd.h>
#include <linux/mm.h>
#include <linux/vmstat.h>
#include <linux/writeback.h>
#include <linux/page-flags.h>
#include <linux/shrinker.h>

struct mem_cgroup;
struct obj_cgroup;
struct page;
struct mm_struct;
struct kmem_cache;

/* Cgroup-specific page state, on top of universal node page state */
enum memcg_stat_item {
        MEMCG_SWAP = NR_VM_NODE_STAT_ITEMS,
        MEMCG_SOCK,
        MEMCG_PERCPU_B,
        MEMCG_VMALLOC,
        MEMCG_KMEM,
        MEMCG_ZSWAP_B,
        MEMCG_ZSWAPPED,
        MEMCG_NR_STAT,
};

enum memcg_memory_event {
        MEMCG_LOW,
        MEMCG_HIGH,
        MEMCG_MAX,
        MEMCG_OOM,
        MEMCG_OOM_KILL,
        MEMCG_OOM_GROUP_KILL,
        MEMCG_SWAP_HIGH,
        MEMCG_SWAP_MAX,
        MEMCG_SWAP_FAIL,
        MEMCG_NR_MEMORY_EVENTS,
};

struct mem_cgroup_reclaim_cookie {
        pg_data_t *pgdat;
        unsigned int generation;
};

#ifdef CONFIG_MEMCG

#define MEM_CGROUP_ID_SHIFT        16

struct mem_cgroup_id {
        int id;
        refcount_t ref;
};

struct memcg_vmstats_percpu;
struct memcg_vmstats;
struct lruvec_stats_percpu;
struct lruvec_stats;

struct mem_cgroup_reclaim_iter {
        struct mem_cgroup *position;
        /* scan generation, increased every round-trip */
        unsigned int generation;
};

/*
 * per-node information in memory controller.
 */
struct mem_cgroup_per_node {
        /* Keep the read-only fields at the start */
        struct mem_cgroup        *memcg;                /* Back pointer, we cannot */
                                                /* use container_of           */

        struct lruvec_stats_percpu __percpu        *lruvec_stats_percpu;
        struct lruvec_stats                        *lruvec_stats;
        struct shrinker_info __rcu        *shrinker_info;

#ifdef CONFIG_MEMCG_V1
        /*
         * Memcg-v1 only stuff in middle as buffer between read mostly fields
         * and update often fields to avoid false sharing. If v1 stuff is
         * not present, an explicit padding is needed.
         */

        struct rb_node                tree_node;        /* RB tree node */
        unsigned long                usage_in_excess;/* Set to the value by which */
                                                /* the soft limit is exceeded*/
        bool                        on_tree;
#else
        CACHELINE_PADDING(_pad1_);
#endif

        /* Fields which get updated often at the end. */
        struct lruvec                lruvec;
        CACHELINE_PADDING(_pad2_);
        unsigned long                lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS];
        struct mem_cgroup_reclaim_iter        iter;
};

struct mem_cgroup_threshold {
        struct eventfd_ctx *eventfd;
        unsigned long threshold;
};

/* For threshold */
struct mem_cgroup_threshold_ary {
        /* An array index points to threshold just below or equal to usage. */
        int current_threshold;
        /* Size of entries[] */
        unsigned int size;
        /* Array of thresholds */
        struct mem_cgroup_threshold entries[] __counted_by(size);
};

struct mem_cgroup_thresholds {
        /* Primary thresholds array */
        struct mem_cgroup_threshold_ary *primary;
        /*
         * Spare threshold array.
         * This is needed to make mem_cgroup_unregister_event() "never fail".
         * It must be able to store at least primary->size - 1 entries.
         */
        struct mem_cgroup_threshold_ary *spare;
};

/*
 * Remember four most recent foreign writebacks with dirty pages in this
 * cgroup.  Inode sharing is expected to be uncommon and, even if we miss
 * one in a given round, we're likely to catch it later if it keeps
 * foreign-dirtying, so a fairly low count should be enough.
 *
 * See mem_cgroup_track_foreign_dirty_slowpath() for details.
 */
#define MEMCG_CGWB_FRN_CNT        4

struct memcg_cgwb_frn {
        u64 bdi_id;                        /* bdi->id of the foreign inode */
        int memcg_id;                        /* memcg->css.id of foreign inode */
        u64 at;                                /* jiffies_64 at the time of dirtying */
        struct wb_completion done;        /* tracks in-flight foreign writebacks */
};

/*
 * Bucket for arbitrarily byte-sized objects charged to a memory
 * cgroup. The bucket can be reparented in one piece when the cgroup
 * is destroyed, without having to round up the individual references
 * of all live memory objects in the wild.
 */
struct obj_cgroup {
        struct percpu_ref refcnt;
        struct mem_cgroup *memcg;
        atomic_t nr_charged_bytes;
        union {
                struct list_head list; /* protected by objcg_lock */
                struct rcu_head rcu;
        };
};

/*
 * The memory controller data structure. The memory controller controls both
 * page cache and RSS per cgroup. We would eventually like to provide
 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
 * to help the administrator determine what knobs to tune.
 */
struct mem_cgroup {
        struct cgroup_subsys_state css;

        /* Private memcg ID. Used to ID objects that outlive the cgroup */
        struct mem_cgroup_id id;

        /* Accounted resources */
        struct page_counter memory;                /* Both v1 & v2 */

        union {
                struct page_counter swap;        /* v2 only */
                struct page_counter memsw;        /* v1 only */
        };

        /* Range enforcement for interrupt charges */
        struct work_struct high_work;

#ifdef CONFIG_ZSWAP
        unsigned long zswap_max;

        /*
         * Prevent pages from this memcg from being written back from zswap to
         * swap, and from being swapped out on zswap store failures.
         */
        bool zswap_writeback;
#endif

        /* vmpressure notifications */
        struct vmpressure vmpressure;

        /*
         * Should the OOM killer kill all belonging tasks, had it kill one?
         */
        bool oom_group;

        int swappiness;

        /* memory.events and memory.events.local */
        struct cgroup_file events_file;
        struct cgroup_file events_local_file;

        /* handle for "memory.swap.events" */
        struct cgroup_file swap_events_file;

        /* memory.stat */
        struct memcg_vmstats        *vmstats;

        /* memory.events */
        atomic_long_t                memory_events[MEMCG_NR_MEMORY_EVENTS];
        atomic_long_t                memory_events_local[MEMCG_NR_MEMORY_EVENTS];

        /*
         * Hint of reclaim pressure for socket memroy management. Note
         * that this indicator should NOT be used in legacy cgroup mode
         * where socket memory is accounted/charged separately.
         */
        unsigned long                socket_pressure;

        int kmemcg_id;
        /*
         * memcg->objcg is wiped out as a part of the objcg repaprenting
         * process. memcg->orig_objcg preserves a pointer (and a reference)
         * to the original objcg until the end of live of memcg.
         */
        struct obj_cgroup __rcu        *objcg;
        struct obj_cgroup        *orig_objcg;
        /* list of inherited objcgs, protected by objcg_lock */
        struct list_head objcg_list;

        struct memcg_vmstats_percpu __percpu *vmstats_percpu;

#ifdef CONFIG_CGROUP_WRITEBACK
        struct list_head cgwb_list;
        struct wb_domain cgwb_domain;
        struct memcg_cgwb_frn cgwb_frn[MEMCG_CGWB_FRN_CNT];
#endif

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
        struct deferred_split deferred_split_queue;
#endif

#ifdef CONFIG_LRU_GEN_WALKS_MMU
        /* per-memcg mm_struct list */
        struct lru_gen_mm_list mm_list;
#endif

#ifdef CONFIG_MEMCG_V1
        /* Legacy consumer-oriented counters */
        struct page_counter kmem;                /* v1 only */
        struct page_counter tcpmem;                /* v1 only */

        unsigned long soft_limit;

        /* protected by memcg_oom_lock */
        bool oom_lock;
        int under_oom;

        /* OOM-Killer disable */
        int oom_kill_disable;

        /* protect arrays of thresholds */
        struct mutex thresholds_lock;

        /* thresholds for memory usage. RCU-protected */
        struct mem_cgroup_thresholds thresholds;

        /* thresholds for mem+swap usage. RCU-protected */
        struct mem_cgroup_thresholds memsw_thresholds;

        /* For oom notifier event fd */
        struct list_head oom_notify;

        /*
         * Should we move charges of a task when a task is moved into this
         * mem_cgroup ? And what type of charges should we move ?
         */
        unsigned long move_charge_at_immigrate;
        /* taken only while moving_account > 0 */
        spinlock_t move_lock;
        unsigned long move_lock_flags;

        /* Legacy tcp memory accounting */
        bool tcpmem_active;
        int tcpmem_pressure;

        /*
         * set > 0 if pages under this cgroup are moving to other cgroup.
         */
        atomic_t moving_account;
        struct task_struct *move_lock_task;

        /* List of events which userspace want to receive */
        struct list_head event_list;
        spinlock_t event_list_lock;
#endif /* CONFIG_MEMCG_V1 */

        struct mem_cgroup_per_node *nodeinfo[];
};

/*
 * size of first charge trial.
 * TODO: maybe necessary to use big numbers in big irons or dynamic based of the
 * workload.
 */
#define MEMCG_CHARGE_BATCH 64U

extern struct mem_cgroup *root_mem_cgroup;

enum page_memcg_data_flags {
        /* page->memcg_data is a pointer to an slabobj_ext vector */
        MEMCG_DATA_OBJEXTS = (1UL << 0),
        /* page has been accounted as a non-slab kernel page */
        MEMCG_DATA_KMEM = (1UL << 1),
        /* the next bit after the last actual flag */
        __NR_MEMCG_DATA_FLAGS  = (1UL << 2),
};

#define __FIRST_OBJEXT_FLAG        __NR_MEMCG_DATA_FLAGS

#else /* CONFIG_MEMCG */

#define __FIRST_OBJEXT_FLAG        (1UL << 0)

#endif /* CONFIG_MEMCG */

enum objext_flags {
        /* slabobj_ext vector failed to allocate */
        OBJEXTS_ALLOC_FAIL = __FIRST_OBJEXT_FLAG,
        /* the next bit after the last actual flag */
        __NR_OBJEXTS_FLAGS  = (__FIRST_OBJEXT_FLAG << 1),
};

#define OBJEXTS_FLAGS_MASK (__NR_OBJEXTS_FLAGS - 1)

#ifdef CONFIG_MEMCG

static inline bool folio_memcg_kmem(struct folio *folio);

/*
 * After the initialization objcg->memcg is always pointing at
 * a valid memcg, but can be atomically swapped to the parent memcg.
 *
 * The caller must ensure that the returned memcg won't be released:
 * e.g. acquire the rcu_read_lock or css_set_lock.
 */
static inline struct mem_cgroup *obj_cgroup_memcg(struct obj_cgroup *objcg)
{
        return READ_ONCE(objcg->memcg);
}

/*
 * __folio_memcg - Get the memory cgroup associated with a non-kmem folio
 * @folio: Pointer to the folio.
 *
 * Returns a pointer to the memory cgroup associated with the folio,
 * or NULL. This function assumes that the folio is known to have a
 * proper memory cgroup pointer. It's not safe to call this function
 * against some type of folios, e.g. slab folios or ex-slab folios or
 * kmem folios.
 */
static inline struct mem_cgroup *__folio_memcg(struct folio *folio)
{
        unsigned long memcg_data = folio->memcg_data;

        VM_BUG_ON_FOLIO(folio_test_slab(folio), folio);
        VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio);
        VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_KMEM, folio);

        return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK);
}

/*
 * __folio_objcg - get the object cgroup associated with a kmem folio.
 * @folio: Pointer to the folio.
 *
 * Returns a pointer to the object cgroup associated with the folio,
 * or NULL. This function assumes that the folio is known to have a
 * proper object cgroup pointer. It's not safe to call this function
 * against some type of folios, e.g. slab folios or ex-slab folios or
 * LRU folios.
 */
static inline struct obj_cgroup *__folio_objcg(struct folio *folio)
{
        unsigned long memcg_data = folio->memcg_data;

        VM_BUG_ON_FOLIO(folio_test_slab(folio), folio);
        VM_BUG_ON_FOLIO(memcg_data & MEMCG_DATA_OBJEXTS, folio);
        VM_BUG_ON_FOLIO(!(memcg_data & MEMCG_DATA_KMEM), folio);

        return (struct obj_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK);
}

/*
 * folio_memcg - Get the memory cgroup associated with a folio.
 * @folio: Pointer to the folio.
 *
 * Returns a pointer to the memory cgroup associated with the folio,
 * or NULL. This function assumes that the folio is known to have a
 * proper memory cgroup pointer. It's not safe to call this function
 * against some type of folios, e.g. slab folios or ex-slab folios.
 *
 * For a non-kmem folio any of the following ensures folio and memcg binding
 * stability:
 *
 * - the folio lock
 * - LRU isolation
 * - folio_memcg_lock()
 * - exclusive reference
 * - mem_cgroup_trylock_pages()
 *
 * For a kmem folio a caller should hold an rcu read lock to protect memcg
 * associated with a kmem folio from being released.
 */
static inline struct mem_cgroup *folio_memcg(struct folio *folio)
{
        if (folio_memcg_kmem(folio))
                return obj_cgroup_memcg(__folio_objcg(folio));
        return __folio_memcg(folio);
}

/**
 * folio_memcg_rcu - Locklessly get the memory cgroup associated with a folio.
 * @folio: Pointer to the folio.
 *
 * This function assumes that the folio is known to have a
 * proper memory cgroup pointer. It's not safe to call this function
 * against some type of folios, e.g. slab folios or ex-slab folios.
 *
 * Return: A pointer to the memory cgroup associated with the folio,
 * or NULL.
 */
static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio)
{
        unsigned long memcg_data = READ_ONCE(folio->memcg_data);

        VM_BUG_ON_FOLIO(folio_test_slab(folio), folio);
        WARN_ON_ONCE(!rcu_read_lock_held());

        if (memcg_data & MEMCG_DATA_KMEM) {
                struct obj_cgroup *objcg;

                objcg = (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK);
                return obj_cgroup_memcg(objcg);
        }

        return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK);
}

/*
 * folio_memcg_check - Get the memory cgroup associated with a folio.
 * @folio: Pointer to the folio.
 *
 * Returns a pointer to the memory cgroup associated with the folio,
 * or NULL. This function unlike folio_memcg() can take any folio
 * as an argument. It has to be used in cases when it's not known if a folio
 * has an associated memory cgroup pointer or an object cgroups vector or
 * an object cgroup.
 *
 * For a non-kmem folio any of the following ensures folio and memcg binding
 * stability:
 *
 * - the folio lock
 * - LRU isolation
 * - lock_folio_memcg()
 * - exclusive reference
 * - mem_cgroup_trylock_pages()
 *
 * For a kmem folio a caller should hold an rcu read lock to protect memcg
 * associated with a kmem folio from being released.
 */
static inline struct mem_cgroup *folio_memcg_check(struct folio *folio)
{
        /*
         * Because folio->memcg_data might be changed asynchronously
         * for slabs, READ_ONCE() should be used here.
         */
        unsigned long memcg_data = READ_ONCE(folio->memcg_data);

        if (memcg_data & MEMCG_DATA_OBJEXTS)
                return NULL;

        if (memcg_data & MEMCG_DATA_KMEM) {
                struct obj_cgroup *objcg;

                objcg = (void *)(memcg_data & ~OBJEXTS_FLAGS_MASK);
                return obj_cgroup_memcg(objcg);
        }

        return (struct mem_cgroup *)(memcg_data & ~OBJEXTS_FLAGS_MASK);
}

static inline struct mem_cgroup *page_memcg_check(struct page *page)
{
        if (PageTail(page))
                return NULL;
        return folio_memcg_check((struct folio *)page);
}

static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg)
{
        struct mem_cgroup *memcg;

        rcu_read_lock();
retry:
        memcg = obj_cgroup_memcg(objcg);
        if (unlikely(!css_tryget(&memcg->css)))
                goto retry;
        rcu_read_unlock();

        return memcg;
}

/*
 * folio_memcg_kmem - Check if the folio has the memcg_kmem flag set.
 * @folio: Pointer to the folio.
 *
 * Checks if the folio has MemcgKmem flag set. The caller must ensure
 * that the folio has an associated memory cgroup. It's not safe to call
 * this function against some types of folios, e.g. slab folios.
 */
static inline bool folio_memcg_kmem(struct folio *folio)
{
        VM_BUG_ON_PGFLAGS(PageTail(&folio->page), &folio->page);
        VM_BUG_ON_FOLIO(folio->memcg_data & MEMCG_DATA_OBJEXTS, folio);
        return folio->memcg_data & MEMCG_DATA_KMEM;
}

static inline bool PageMemcgKmem(struct page *page)
{
        return folio_memcg_kmem(page_folio(page));
}

static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
{
        return (memcg == root_mem_cgroup);
}

static inline bool mem_cgroup_disabled(void)
{
        return !cgroup_subsys_enabled(memory_cgrp_subsys);
}

static inline void mem_cgroup_protection(struct mem_cgroup *root,
                                         struct mem_cgroup *memcg,
                                         unsigned long *min,
                                         unsigned long *low)
{
        *min = *low = 0;

        if (mem_cgroup_disabled())
                return;

        /*
         * There is no reclaim protection applied to a targeted reclaim.
         * We are special casing this specific case here because
         * mem_cgroup_calculate_protection is not robust enough to keep
         * the protection invariant for calculated effective values for
         * parallel reclaimers with different reclaim target. This is
         * especially a problem for tail memcgs (as they have pages on LRU)
         * which would want to have effective values 0 for targeted reclaim
         * but a different value for external reclaim.
         *
         * Example
         * Let's have global and A's reclaim in parallel:
         *  |
         *  A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G)
         *  |\
         *  | C (low = 1G, usage = 2.5G)
         *  B (low = 1G, usage = 0.5G)
         *
         * For the global reclaim
         * A.elow = A.low
         * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow
         * C.elow = min(C.usage, C.low)
         *
         * With the effective values resetting we have A reclaim
         * A.elow = 0
         * B.elow = B.low
         * C.elow = C.low
         *
         * If the global reclaim races with A's reclaim then
         * B.elow = C.elow = 0 because children_low_usage > A.elow)
         * is possible and reclaiming B would be violating the protection.
         *
         */
        if (root == memcg)
                return;

        *min = READ_ONCE(memcg->memory.emin);
        *low = READ_ONCE(memcg->memory.elow);
}

void mem_cgroup_calculate_protection(struct mem_cgroup *root,
                                     struct mem_cgroup *memcg);

static inline bool mem_cgroup_unprotected(struct mem_cgroup *target,
                                          struct mem_cgroup *memcg)
{
        /*
         * The root memcg doesn't account charges, and doesn't support
         * protection. The target memcg's protection is ignored, see
         * mem_cgroup_calculate_protection() and mem_cgroup_protection()
         */
        return mem_cgroup_disabled() || mem_cgroup_is_root(memcg) ||
                memcg == target;
}

static inline bool mem_cgroup_below_low(struct mem_cgroup *target,
                                        struct mem_cgroup *memcg)
{
        if (mem_cgroup_unprotected(target, memcg))
                return false;

        return READ_ONCE(memcg->memory.elow) >=
                page_counter_read(&memcg->memory);
}

static inline bool mem_cgroup_below_min(struct mem_cgroup *target,
                                        struct mem_cgroup *memcg)
{
        if (mem_cgroup_unprotected(target, memcg))
                return false;

        return READ_ONCE(memcg->memory.emin) >=
                page_counter_read(&memcg->memory);
}

void mem_cgroup_commit_charge(struct folio *folio, struct mem_cgroup *memcg);

int __mem_cgroup_charge(struct folio *folio, struct mm_struct *mm, gfp_t gfp);

/**
 * mem_cgroup_charge - Charge a newly allocated folio to a cgroup.
 * @folio: Folio to charge.
 * @mm: mm context of the allocating task.
 * @gfp: Reclaim mode.
 *
 * Try to charge @folio to the memcg that @mm belongs to, reclaiming
 * pages according to @gfp if necessary.  If @mm is NULL, try to
 * charge to the active memcg.
 *
 * Do not use this for folios allocated for swapin.
 *
 * Return: 0 on success. Otherwise, an error code is returned.
 */
static inline int mem_cgroup_charge(struct folio *folio, struct mm_struct *mm,
                                    gfp_t gfp)
{
        if (mem_cgroup_disabled())
                return 0;
        return __mem_cgroup_charge(folio, mm, gfp);
}

int mem_cgroup_hugetlb_try_charge(struct mem_cgroup *memcg, gfp_t gfp,
                long nr_pages);

int mem_cgroup_swapin_charge_folio(struct folio *folio, struct mm_struct *mm,
                                  gfp_t gfp, swp_entry_t entry);
void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry);

void __mem_cgroup_uncharge(struct folio *folio);

/**
 * mem_cgroup_uncharge - Uncharge a folio.
 * @folio: Folio to uncharge.
 *
 * Uncharge a folio previously charged with mem_cgroup_charge().
 */
static inline void mem_cgroup_uncharge(struct folio *folio)
{
        if (mem_cgroup_disabled())
                return;
        __mem_cgroup_uncharge(folio);
}

void __mem_cgroup_uncharge_folios(struct folio_batch *folios);
static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios)
{
        if (mem_cgroup_disabled())
                return;
        __mem_cgroup_uncharge_folios(folios);
}

void mem_cgroup_cancel_charge(struct mem_cgroup *memcg, unsigned int nr_pages);
void mem_cgroup_replace_folio(struct folio *old, struct folio *new);
void mem_cgroup_migrate(struct folio *old, struct folio *new);

/**
 * mem_cgroup_lruvec - get the lru list vector for a memcg & node
 * @memcg: memcg of the wanted lruvec
 * @pgdat: pglist_data
 *
 * Returns the lru list vector holding pages for a given @memcg &
 * @pgdat combination. This can be the node lruvec, if the memory
 * controller is disabled.
 */
static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg,
                                               struct pglist_data *pgdat)
{
        struct mem_cgroup_per_node *mz;
        struct lruvec *lruvec;

        if (mem_cgroup_disabled()) {
                lruvec = &pgdat->__lruvec;
                goto out;
        }

        if (!memcg)
                memcg = root_mem_cgroup;

        mz = memcg->nodeinfo[pgdat->node_id];
        lruvec = &mz->lruvec;
out:
        /*
         * Since a node can be onlined after the mem_cgroup was created,
         * we have to be prepared to initialize lruvec->pgdat here;
         * and if offlined then reonlined, we need to reinitialize it.
         */
        if (unlikely(lruvec->pgdat != pgdat))
                lruvec->pgdat = pgdat;
        return lruvec;
}

/**
 * folio_lruvec - return lruvec for isolating/putting an LRU folio
 * @folio: Pointer to the folio.
 *
 * This function relies on folio->mem_cgroup being stable.
 */
static inline struct lruvec *folio_lruvec(struct folio *folio)
{
        struct mem_cgroup *memcg = folio_memcg(folio);

        VM_WARN_ON_ONCE_FOLIO(!memcg && !mem_cgroup_disabled(), folio);
        return mem_cgroup_lruvec(memcg, folio_pgdat(folio));
}

struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);

struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm);

struct mem_cgroup *get_mem_cgroup_from_current(void);

struct lruvec *folio_lruvec_lock(struct folio *folio);
struct lruvec *folio_lruvec_lock_irq(struct folio *folio);
struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio,
                                                unsigned long *flags);

#ifdef CONFIG_DEBUG_VM
void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio);
#else
static inline
void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio)
{
}
#endif

static inline
struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){
        return css ? container_of(css, struct mem_cgroup, css) : NULL;
}

static inline bool obj_cgroup_tryget(struct obj_cgroup *objcg)
{
        return percpu_ref_tryget(&objcg->refcnt);
}

static inline void obj_cgroup_get(struct obj_cgroup *objcg)
{
        percpu_ref_get(&objcg->refcnt);
}

static inline void obj_cgroup_get_many(struct obj_cgroup *objcg,
                                       unsigned long nr)
{
        percpu_ref_get_many(&objcg->refcnt, nr);
}

static inline void obj_cgroup_put(struct obj_cgroup *objcg)
{
        if (objcg)
                percpu_ref_put(&objcg->refcnt);
}

static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg)
{
        return !memcg || css_tryget(&memcg->css);
}

static inline bool mem_cgroup_tryget_online(struct mem_cgroup *memcg)
{
        return !memcg || css_tryget_online(&memcg->css);
}

static inline void mem_cgroup_put(struct mem_cgroup *memcg)
{
        if (memcg)
                css_put(&memcg->css);
}

#define mem_cgroup_from_counter(counter, member)        \
        container_of(counter, struct mem_cgroup, member)

struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
                                   struct mem_cgroup *,
                                   struct mem_cgroup_reclaim_cookie *);
void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
void mem_cgroup_scan_tasks(struct mem_cgroup *memcg,
                           int (*)(struct task_struct *, void *), void *arg);

static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
{
        if (mem_cgroup_disabled())
                return 0;

        return memcg->id.id;
}
struct mem_cgroup *mem_cgroup_from_id(unsigned short id);

#ifdef CONFIG_SHRINKER_DEBUG
static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg)
{
        return memcg ? cgroup_ino(memcg->css.cgroup) : 0;
}

struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino);
#endif

static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m)
{
        return mem_cgroup_from_css(seq_css(m));
}

static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
{
        struct mem_cgroup_per_node *mz;

        if (mem_cgroup_disabled())
                return NULL;

        mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
        return mz->memcg;
}

/**
 * parent_mem_cgroup - find the accounting parent of a memcg
 * @memcg: memcg whose parent to find
 *
 * Returns the parent memcg, or NULL if this is the root.
 */
static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
{
        return mem_cgroup_from_css(memcg->css.parent);
}

static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
                              struct mem_cgroup *root)
{
        if (root == memcg)
                return true;
        return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup);
}

static inline bool mm_match_cgroup(struct mm_struct *mm,
                                   struct mem_cgroup *memcg)
{
        struct mem_cgroup *task_memcg;
        bool match = false;

        rcu_read_lock();
        task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
        if (task_memcg)
                match = mem_cgroup_is_descendant(task_memcg, memcg);
        rcu_read_unlock();
        return match;
}

struct cgroup_subsys_state *mem_cgroup_css_from_folio(struct folio *folio);
ino_t page_cgroup_ino(struct page *page);

static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
{
        if (mem_cgroup_disabled())
                return true;
        return !!(memcg->css.flags & CSS_ONLINE);
}

void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
                int zid, int nr_pages);

static inline
unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec,
                enum lru_list lru, int zone_idx)
{
        struct mem_cgroup_per_node *mz;

        mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
        return READ_ONCE(mz->lru_zone_size[zone_idx][lru]);
}

void mem_cgroup_handle_over_high(gfp_t gfp_mask);

unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg);

unsigned long mem_cgroup_size(struct mem_cgroup *memcg);

void mem_cgroup_print_oom_context(struct mem_cgroup *memcg,
                                struct task_struct *p);

void mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg);

struct mem_cgroup *mem_cgroup_get_oom_group(struct task_struct *victim,
                                            struct mem_cgroup *oom_domain);
void mem_cgroup_print_oom_group(struct mem_cgroup *memcg);

void __mod_memcg_state(struct mem_cgroup *memcg, enum memcg_stat_item idx,
                       int val);

/* idx can be of type enum memcg_stat_item or node_stat_item */
static inline void mod_memcg_state(struct mem_cgroup *memcg,
                                   enum memcg_stat_item idx, int val)
{
        unsigned long flags;

        local_irq_save(flags);
        __mod_memcg_state(memcg, idx, val);
        local_irq_restore(flags);
}

static inline void mod_memcg_page_state(struct page *page,
                                        enum memcg_stat_item idx, int val)
{
        struct mem_cgroup *memcg;

        if (mem_cgroup_disabled())
                return;

        rcu_read_lock();
        memcg = folio_memcg(page_folio(page));
        if (memcg)
                mod_memcg_state(memcg, idx, val);
        rcu_read_unlock();
}

unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx);
unsigned long lruvec_page_state(struct lruvec *lruvec, enum node_stat_item idx);
unsigned long lruvec_page_state_local(struct lruvec *lruvec,
                                      enum node_stat_item idx);

void mem_cgroup_flush_stats(struct mem_cgroup *memcg);
void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg);

void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx, int val);

static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx,
                                         int val)
{
        unsigned long flags;

        local_irq_save(flags);
        __mod_lruvec_kmem_state(p, idx, val);
        local_irq_restore(flags);
}

void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx,
                          unsigned long count);

static inline void count_memcg_events(struct mem_cgroup *memcg,
                                      enum vm_event_item idx,
                                      unsigned long count)
{
        unsigned long flags;

        local_irq_save(flags);
        __count_memcg_events(memcg, idx, count);
        local_irq_restore(flags);
}

static inline void count_memcg_folio_events(struct folio *folio,
                enum vm_event_item idx, unsigned long nr)
{
        struct mem_cgroup *memcg = folio_memcg(folio);

        if (memcg)
                count_memcg_events(memcg, idx, nr);
}

static inline void count_memcg_event_mm(struct mm_struct *mm,
                                        enum vm_event_item idx)
{
        struct mem_cgroup *memcg;

        if (mem_cgroup_disabled())
                return;

        rcu_read_lock();
        memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
        if (likely(memcg))
                count_memcg_events(memcg, idx, 1);
        rcu_read_unlock();
}

static inline void memcg_memory_event(struct mem_cgroup *memcg,
                                      enum memcg_memory_event event)
{
        bool swap_event = event == MEMCG_SWAP_HIGH || event == MEMCG_SWAP_MAX ||
                          event == MEMCG_SWAP_FAIL;

        atomic_long_inc(&memcg->memory_events_local[event]);
        if (!swap_event)
                cgroup_file_notify(&memcg->events_local_file);

        do {
                atomic_long_inc(&memcg->memory_events[event]);
                if (swap_event)
                        cgroup_file_notify(&memcg->swap_events_file);
                else
                        cgroup_file_notify(&memcg->events_file);

                if (!cgroup_subsys_on_dfl(memory_cgrp_subsys))
                        break;
                if (cgrp_dfl_root.flags & CGRP_ROOT_MEMORY_LOCAL_EVENTS)
                        break;
        } while ((memcg = parent_mem_cgroup(memcg)) &&
                 !mem_cgroup_is_root(memcg));
}

static inline void memcg_memory_event_mm(struct mm_struct *mm,
                                         enum memcg_memory_event event)
{
        struct mem_cgroup *memcg;

        if (mem_cgroup_disabled())
                return;

        rcu_read_lock();
        memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
        if (likely(memcg))
                memcg_memory_event(memcg, event);
        rcu_read_unlock();
}

void split_page_memcg(struct page *head, int old_order, int new_order);

#else /* CONFIG_MEMCG */

#define MEM_CGROUP_ID_SHIFT        0

static inline struct mem_cgroup *folio_memcg(struct folio *folio)
{
        return NULL;
}

static inline struct mem_cgroup *folio_memcg_rcu(struct folio *folio)
{
        WARN_ON_ONCE(!rcu_read_lock_held());
        return NULL;
}

static inline struct mem_cgroup *folio_memcg_check(struct folio *folio)
{
        return NULL;
}

static inline struct mem_cgroup *page_memcg_check(struct page *page)
{
        return NULL;
}

static inline struct mem_cgroup *get_mem_cgroup_from_objcg(struct obj_cgroup *objcg)
{
        return NULL;
}

static inline bool folio_memcg_kmem(struct folio *folio)
{
        return false;
}

static inline bool PageMemcgKmem(struct page *page)
{
        return false;
}

static inline bool mem_cgroup_is_root(struct mem_cgroup *memcg)
{
        return true;
}

static inline bool mem_cgroup_disabled(void)
{
        return true;
}

static inline void memcg_memory_event(struct mem_cgroup *memcg,
                                      enum memcg_memory_event event)
{
}

static inline void memcg_memory_event_mm(struct mm_struct *mm,
                                         enum memcg_memory_event event)
{
}

static inline void mem_cgroup_protection(struct mem_cgroup *root,
                                         struct mem_cgroup *memcg,
                                         unsigned long *min,
                                         unsigned long *low)
{
        *min = *low = 0;
}

static inline void mem_cgroup_calculate_protection(struct mem_cgroup *root,
                                                   struct mem_cgroup *memcg)
{
}

static inline bool mem_cgroup_unprotected(struct mem_cgroup *target,
                                          struct mem_cgroup *memcg)
{
        return true;
}
static inline bool mem_cgroup_below_low(struct mem_cgroup *target,
                                        struct mem_cgroup *memcg)
{
        return false;
}

static inline bool mem_cgroup_below_min(struct mem_cgroup *target,
                                        struct mem_cgroup *memcg)
{
        return false;
}

static inline void mem_cgroup_commit_charge(struct folio *folio,
                struct mem_cgroup *memcg)
{
}

static inline int mem_cgroup_charge(struct folio *folio,
                struct mm_struct *mm, gfp_t gfp)
{
        return 0;
}

static inline int mem_cgroup_hugetlb_try_charge(struct mem_cgroup *memcg,
                gfp_t gfp, long nr_pages)
{
        return 0;
}

static inline int mem_cgroup_swapin_charge_folio(struct folio *folio,
                        struct mm_struct *mm, gfp_t gfp, swp_entry_t entry)
{
        return 0;
}

static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry)
{
}

static inline void mem_cgroup_uncharge(struct folio *folio)
{
}

static inline void mem_cgroup_uncharge_folios(struct folio_batch *folios)
{
}

static inline void mem_cgroup_cancel_charge(struct mem_cgroup *memcg,
                unsigned int nr_pages)
{
}

static inline void mem_cgroup_replace_folio(struct folio *old,
                struct folio *new)
{
}

static inline void mem_cgroup_migrate(struct folio *old, struct folio *new)
{
}

static inline struct lruvec *mem_cgroup_lruvec(struct mem_cgroup *memcg,
                                               struct pglist_data *pgdat)
{
        return &pgdat->__lruvec;
}

static inline struct lruvec *folio_lruvec(struct folio *folio)
{
        struct pglist_data *pgdat = folio_pgdat(folio);
        return &pgdat->__lruvec;
}

static inline
void lruvec_memcg_debug(struct lruvec *lruvec, struct folio *folio)
{
}

static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
{
        return NULL;
}

static inline bool mm_match_cgroup(struct mm_struct *mm,
                struct mem_cgroup *memcg)
{
        return true;
}

static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm)
{
        return NULL;
}

static inline struct mem_cgroup *get_mem_cgroup_from_current(void)
{
        return NULL;
}

static inline
struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css)
{
        return NULL;
}

static inline void obj_cgroup_put(struct obj_cgroup *objcg)
{
}

static inline bool mem_cgroup_tryget(struct mem_cgroup *memcg)
{
        return true;
}

static inline bool mem_cgroup_tryget_online(struct mem_cgroup *memcg)
{
        return true;
}

static inline void mem_cgroup_put(struct mem_cgroup *memcg)
{
}

static inline struct lruvec *folio_lruvec_lock(struct folio *folio)
{
        struct pglist_data *pgdat = folio_pgdat(folio);

        spin_lock(&pgdat->__lruvec.lru_lock);
        return &pgdat->__lruvec;
}

static inline struct lruvec *folio_lruvec_lock_irq(struct folio *folio)
{
        struct pglist_data *pgdat = folio_pgdat(folio);

        spin_lock_irq(&pgdat->__lruvec.lru_lock);
        return &pgdat->__lruvec;
}

static inline struct lruvec *folio_lruvec_lock_irqsave(struct folio *folio,
                unsigned long *flagsp)
{
        struct pglist_data *pgdat = folio_pgdat(folio);

        spin_lock_irqsave(&pgdat->__lruvec.lru_lock, *flagsp);
        return &pgdat->__lruvec;
}

static inline struct mem_cgroup *
mem_cgroup_iter(struct mem_cgroup *root,
                struct mem_cgroup *prev,
                struct mem_cgroup_reclaim_cookie *reclaim)
{
        return NULL;
}

static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
                                         struct mem_cgroup *prev)
{
}

static inline void mem_cgroup_scan_tasks(struct mem_cgroup *memcg,
                int (*fn)(struct task_struct *, void *), void *arg)
{
}

static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
{
        return 0;
}

static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
{
        WARN_ON_ONCE(id);
        /* XXX: This should always return root_mem_cgroup */
        return NULL;
}

#ifdef CONFIG_SHRINKER_DEBUG
static inline unsigned long mem_cgroup_ino(struct mem_cgroup *memcg)
{
        return 0;
}

static inline struct mem_cgroup *mem_cgroup_get_from_ino(unsigned long ino)
{
        return NULL;
}
#endif

static inline struct mem_cgroup *mem_cgroup_from_seq(struct seq_file *m)
{
        return NULL;
}

static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
{
        return NULL;
}

static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
{
        return true;
}

static inline
unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec,
                enum lru_list lru, int zone_idx)
{
        return 0;
}

static inline unsigned long mem_cgroup_get_max(struct mem_cgroup *memcg)
{
        return 0;
}

static inline unsigned long mem_cgroup_size(struct mem_cgroup *memcg)
{
        return 0;
}

static inline void
mem_cgroup_print_oom_context(struct mem_cgroup *memcg, struct task_struct *p)
{
}

static inline void
mem_cgroup_print_oom_meminfo(struct mem_cgroup *memcg)
{
}

static inline void mem_cgroup_handle_over_high(gfp_t gfp_mask)
{
}

static inline struct mem_cgroup *mem_cgroup_get_oom_group(
        struct task_struct *victim, struct mem_cgroup *oom_domain)
{
        return NULL;
}

static inline void mem_cgroup_print_oom_group(struct mem_cgroup *memcg)
{
}

static inline void __mod_memcg_state(struct mem_cgroup *memcg,
                                     enum memcg_stat_item idx,
                                     int nr)
{
}

static inline void mod_memcg_state(struct mem_cgroup *memcg,
                                   enum memcg_stat_item idx,
                                   int nr)
{
}

static inline void mod_memcg_page_state(struct page *page,
                                        enum memcg_stat_item idx, int val)
{
}

static inline unsigned long memcg_page_state(struct mem_cgroup *memcg, int idx)
{
        return 0;
}

static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
                                              enum node_stat_item idx)
{
        return node_page_state(lruvec_pgdat(lruvec), idx);
}

static inline unsigned long lruvec_page_state_local(struct lruvec *lruvec,
                                                    enum node_stat_item idx)
{
        return node_page_state(lruvec_pgdat(lruvec), idx);
}

static inline void mem_cgroup_flush_stats(struct mem_cgroup *memcg)
{
}

static inline void mem_cgroup_flush_stats_ratelimited(struct mem_cgroup *memcg)
{
}

static inline void __mod_lruvec_kmem_state(void *p, enum node_stat_item idx,
                                           int val)
{
        struct page *page = virt_to_head_page(p);

        __mod_node_page_state(page_pgdat(page), idx, val);
}

static inline void mod_lruvec_kmem_state(void *p, enum node_stat_item idx,
                                         int val)
{
        struct page *page = virt_to_head_page(p);

        mod_node_page_state(page_pgdat(page), idx, val);
}

static inline void count_memcg_events(struct mem_cgroup *memcg,
                                      enum vm_event_item idx,
                                      unsigned long count)
{
}

static inline void __count_memcg_events(struct mem_cgroup *memcg,
                                        enum vm_event_item idx,
                                        unsigned long count)
{
}

static inline void count_memcg_folio_events(struct folio *folio,
                enum vm_event_item idx, unsigned long nr)
{
}

static inline
void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)
{
}

static inline void split_page_memcg(struct page *head, int old_order, int new_order)
{
}
#endif /* CONFIG_MEMCG */

/*
 * Extended information for slab objects stored as an array in page->memcg_data
 * if MEMCG_DATA_OBJEXTS is set.
 */
struct slabobj_ext {
#ifdef CONFIG_MEMCG
        struct obj_cgroup *objcg;
#endif
#ifdef CONFIG_MEM_ALLOC_PROFILING
        union codetag_ref ref;
#endif
} __aligned(8);

static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
{
        __mod_lruvec_kmem_state(p, idx, 1);
}

static inline void __dec_lruvec_kmem_state(void *p, enum node_stat_item idx)
{
        __mod_lruvec_kmem_state(p, idx, -1);
}

static inline struct lruvec *parent_lruvec(struct lruvec *lruvec)
{
        struct mem_cgroup *memcg;

        memcg = lruvec_memcg(lruvec);
        if (!memcg)
                return NULL;
        memcg = parent_mem_cgroup(memcg);
        if (!memcg)
                return NULL;
        return mem_cgroup_lruvec(memcg, lruvec_pgdat(lruvec));
}

static inline void unlock_page_lruvec(struct lruvec *lruvec)
{
        spin_unlock(&lruvec->lru_lock);
}

static inline void unlock_page_lruvec_irq(struct lruvec *lruvec)
{
        spin_unlock_irq(&lruvec->lru_lock);
}

static inline void unlock_page_lruvec_irqrestore(struct lruvec *lruvec,
                unsigned long flags)
{
        spin_unlock_irqrestore(&lruvec->lru_lock, flags);
}

/* Test requires a stable folio->memcg binding, see folio_memcg() */
static inline bool folio_matches_lruvec(struct folio *folio,
                struct lruvec *lruvec)
{
        return lruvec_pgdat(lruvec) == folio_pgdat(folio) &&
               lruvec_memcg(lruvec) == folio_memcg(folio);
}

/* Don't lock again iff page's lruvec locked */
static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio,
                struct lruvec *locked_lruvec)
{
        if (locked_lruvec) {
                if (folio_matches_lruvec(folio, locked_lruvec))
                        return locked_lruvec;

                unlock_page_lruvec_irq(locked_lruvec);
        }

        return folio_lruvec_lock_irq(folio);
}

/* Don't lock again iff folio's lruvec locked */
static inline void folio_lruvec_relock_irqsave(struct folio *folio,
                struct lruvec **lruvecp, unsigned long *flags)
{
        if (*lruvecp) {
                if (folio_matches_lruvec(folio, *lruvecp))
                        return;

                unlock_page_lruvec_irqrestore(*lruvecp, *flags);
        }

        *lruvecp = folio_lruvec_lock_irqsave(folio, flags);
}

#ifdef CONFIG_CGROUP_WRITEBACK

struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
                         unsigned long *pheadroom, unsigned long *pdirty,
                         unsigned long *pwriteback);

void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio,
                                             struct bdi_writeback *wb);

static inline void mem_cgroup_track_foreign_dirty(struct folio *folio,
                                                  struct bdi_writeback *wb)
{
        struct mem_cgroup *memcg;

        if (mem_cgroup_disabled())
                return;

        memcg = folio_memcg(folio);
        if (unlikely(memcg && &memcg->css != wb->memcg_css))
                mem_cgroup_track_foreign_dirty_slowpath(folio, wb);
}

void mem_cgroup_flush_foreign(struct bdi_writeback *wb);

#else        /* CONFIG_CGROUP_WRITEBACK */

static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb)
{
        return NULL;
}

static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
                                       unsigned long *pfilepages,
                                       unsigned long *pheadroom,
                                       unsigned long *pdirty,
                                       unsigned long *pwriteback)
{
}

static inline void mem_cgroup_track_foreign_dirty(struct folio *folio,
                                                  struct bdi_writeback *wb)
{
}

static inline void mem_cgroup_flush_foreign(struct bdi_writeback *wb)
{
}

#endif        /* CONFIG_CGROUP_WRITEBACK */

struct sock;
bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
                             gfp_t gfp_mask);
void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
#ifdef CONFIG_MEMCG
extern struct static_key_false memcg_sockets_enabled_key;
#define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
void mem_cgroup_sk_alloc(struct sock *sk);
void mem_cgroup_sk_free(struct sock *sk);
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
#ifdef CONFIG_MEMCG_V1
        if (!cgroup_subsys_on_dfl(memory_cgrp_subsys))
                return !!memcg->tcpmem_pressure;
#endif /* CONFIG_MEMCG_V1 */
        do {
                if (time_before(jiffies, READ_ONCE(memcg->socket_pressure)))
                        return true;
        } while ((memcg = parent_mem_cgroup(memcg)));
        return false;
}

int alloc_shrinker_info(struct mem_cgroup *memcg);
void free_shrinker_info(struct mem_cgroup *memcg);
void set_shrinker_bit(struct mem_cgroup *memcg, int nid, int shrinker_id);
void reparent_shrinker_deferred(struct mem_cgroup *memcg);
#else
#define mem_cgroup_sockets_enabled 0
static inline void mem_cgroup_sk_alloc(struct sock *sk) { };
static inline void mem_cgroup_sk_free(struct sock *sk) { };
static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
{
        return false;
}

static inline void set_shrinker_bit(struct mem_cgroup *memcg,
                                    int nid, int shrinker_id)
{
}
#endif

#ifdef CONFIG_MEMCG
bool mem_cgroup_kmem_disabled(void);
int __memcg_kmem_charge_page(struct page *page, gfp_t gfp, int order);
void __memcg_kmem_uncharge_page(struct page *page, int order);

/*
 * The returned objcg pointer is safe to use without additional
 * protection within a scope. The scope is defined either by
 * the current task (similar to the "current" global variable)
 * or by set_active_memcg() pair.
 * Please, use obj_cgroup_get() to get a reference if the pointer
 * needs to be used outside of the local scope.
 */
struct obj_cgroup *current_obj_cgroup(void);
struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio);

static inline struct obj_cgroup *get_obj_cgroup_from_current(void)
{
        struct obj_cgroup *objcg = current_obj_cgroup();

        if (objcg)
                obj_cgroup_get(objcg);

        return objcg;
}

int obj_cgroup_charge(struct obj_cgroup *objcg, gfp_t gfp, size_t size);
void obj_cgroup_uncharge(struct obj_cgroup *objcg, size_t size);

extern struct static_key_false memcg_bpf_enabled_key;
static inline bool memcg_bpf_enabled(void)
{
        return static_branch_likely(&memcg_bpf_enabled_key);
}

extern struct static_key_false memcg_kmem_online_key;

static inline bool memcg_kmem_online(void)
{
        return static_branch_likely(&memcg_kmem_online_key);
}

static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp,
                                         int order)
{
        if (memcg_kmem_online())
                return __memcg_kmem_charge_page(page, gfp, order);
        return 0;
}

static inline void memcg_kmem_uncharge_page(struct page *page, int order)
{
        if (memcg_kmem_online())
                __memcg_kmem_uncharge_page(page, order);
}

/*
 * A helper for accessing memcg's kmem_id, used for getting
 * corresponding LRU lists.
 */
static inline int memcg_kmem_id(struct mem_cgroup *memcg)
{
        return memcg ? memcg->kmemcg_id : -1;
}

struct mem_cgroup *mem_cgroup_from_obj(void *p);
struct mem_cgroup *mem_cgroup_from_slab_obj(void *p);

static inline void count_objcg_event(struct obj_cgroup *objcg,
                                     enum vm_event_item idx)
{
        struct mem_cgroup *memcg;

        if (!memcg_kmem_online())
                return;

        rcu_read_lock();
        memcg = obj_cgroup_memcg(objcg);
        count_memcg_events(memcg, idx, 1);
        rcu_read_unlock();
}

#else
static inline bool mem_cgroup_kmem_disabled(void)
{
        return true;
}

static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp,
                                         int order)
{
        return 0;
}

static inline void memcg_kmem_uncharge_page(struct page *page, int order)
{
}

static inline int __memcg_kmem_charge_page(struct page *page, gfp_t gfp,
                                           int order)
{
        return 0;
}

static inline void __memcg_kmem_uncharge_page(struct page *page, int order)
{
}

static inline struct obj_cgroup *get_obj_cgroup_from_folio(struct folio *folio)
{
        return NULL;
}

static inline bool memcg_bpf_enabled(void)
{
        return false;
}

static inline bool memcg_kmem_online(void)
{
        return false;
}

static inline int memcg_kmem_id(struct mem_cgroup *memcg)
{
        return -1;
}

static inline struct mem_cgroup *mem_cgroup_from_obj(void *p)
{
        return NULL;
}

static inline struct mem_cgroup *mem_cgroup_from_slab_obj(void *p)
{
        return NULL;
}

static inline void count_objcg_event(struct obj_cgroup *objcg,
                                     enum vm_event_item idx)
{
}

#endif /* CONFIG_MEMCG */

#if defined(CONFIG_MEMCG) && defined(CONFIG_ZSWAP)
bool obj_cgroup_may_zswap(struct obj_cgroup *objcg);
void obj_cgroup_charge_zswap(struct obj_cgroup *objcg, size_t size);
void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg, size_t size);
bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg);
#else
static inline bool obj_cgroup_may_zswap(struct obj_cgroup *objcg)
{
        return true;
}
static inline void obj_cgroup_charge_zswap(struct obj_cgroup *objcg,
                                           size_t size)
{
}
static inline void obj_cgroup_uncharge_zswap(struct obj_cgroup *objcg,
                                             size_t size)
{
}
static inline bool mem_cgroup_zswap_writeback_enabled(struct mem_cgroup *memcg)
{
        /* if zswap is disabled, do not block pages going to the swapping device */
        return true;
}
#endif


/* Cgroup v1-related declarations */

#ifdef CONFIG_MEMCG_V1
unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order,
                                        gfp_t gfp_mask,
                                        unsigned long *total_scanned);

bool mem_cgroup_oom_synchronize(bool wait);

static inline bool task_in_memcg_oom(struct task_struct *p)
{
        return p->memcg_in_oom;
}

void folio_memcg_lock(struct folio *folio);
void folio_memcg_unlock(struct folio *folio);

/* try to stablize folio_memcg() for all the pages in a memcg */
static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg)
{
        rcu_read_lock();

        if (mem_cgroup_disabled() || !atomic_read(&memcg->moving_account))
                return true;

        rcu_read_unlock();
        return false;
}

static inline void mem_cgroup_unlock_pages(void)
{
        rcu_read_unlock();
}

static inline void mem_cgroup_enter_user_fault(void)
{
        WARN_ON(current->in_user_fault);
        current->in_user_fault = 1;
}

static inline void mem_cgroup_exit_user_fault(void)
{
        WARN_ON(!current->in_user_fault);
        current->in_user_fault = 0;
}

#else /* CONFIG_MEMCG_V1 */
static inline
unsigned long memcg1_soft_limit_reclaim(pg_data_t *pgdat, int order,
                                        gfp_t gfp_mask,
                                        unsigned long *total_scanned)
{
        return 0;
}

static inline void folio_memcg_lock(struct folio *folio)
{
}

static inline void folio_memcg_unlock(struct folio *folio)
{
}

static inline bool mem_cgroup_trylock_pages(struct mem_cgroup *memcg)
{
        /* to match folio_memcg_rcu() */
        rcu_read_lock();
        return true;
}

static inline void mem_cgroup_unlock_pages(void)
{
        rcu_read_unlock();
}

static inline bool task_in_memcg_oom(struct task_struct *p)
{
        return false;
}

static inline bool mem_cgroup_oom_synchronize(bool wait)
{
        return false;
}

static inline void mem_cgroup_enter_user_fault(void)
{
}

static inline void mem_cgroup_exit_user_fault(void)
{
}

#endif /* CONFIG_MEMCG_V1 */

#endif /* _LINUX_MEMCONTROL_H */








































































































































































































































































































    2 


















    2 








    1 
























































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
// SPDX-License-Identifier: GPL-2.0-or-later
/* XTS: as defined in IEEE1619/D16
 *        http://grouper.ieee.org/groups/1619/email/pdf00086.pdf
 *
 * Copyright (c) 2007 Rik Snel <rsnel@cube.dyndns.org>
 *
 * Based on ecb.c
 * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
 */
#include <crypto/internal/cipher.h>
#include <crypto/internal/skcipher.h>
#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>

#include <crypto/xts.h>
#include <crypto/b128ops.h>
#include <crypto/gf128mul.h>

struct xts_tfm_ctx {
        struct crypto_skcipher *child;
        struct crypto_cipher *tweak;
};

struct xts_instance_ctx {
        struct crypto_skcipher_spawn spawn;
        struct crypto_cipher_spawn tweak_spawn;
};

struct xts_request_ctx {
        le128 t;
        struct scatterlist *tail;
        struct scatterlist sg[2];
        struct skcipher_request subreq;
};

static int xts_setkey(struct crypto_skcipher *parent, const u8 *key,
                      unsigned int keylen)
{
        struct xts_tfm_ctx *ctx = crypto_skcipher_ctx(parent);
        struct crypto_skcipher *child;
        struct crypto_cipher *tweak;
        int err;

        err = xts_verify_key(parent, key, keylen);
        if (err)
                return err;

        keylen /= 2;

        /* we need two cipher instances: one to compute the initial 'tweak'
         * by encrypting the IV (usually the 'plain' iv) and the other
         * one to encrypt and decrypt the data */

        /* tweak cipher, uses Key2 i.e. the second half of *key */
        tweak = ctx->tweak;
        crypto_cipher_clear_flags(tweak, CRYPTO_TFM_REQ_MASK);
        crypto_cipher_set_flags(tweak, crypto_skcipher_get_flags(parent) &
                                       CRYPTO_TFM_REQ_MASK);
        err = crypto_cipher_setkey(tweak, key + keylen, keylen);
        if (err)
                return err;

        /* data cipher, uses Key1 i.e. the first half of *key */
        child = ctx->child;
        crypto_skcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK);
        crypto_skcipher_set_flags(child, crypto_skcipher_get_flags(parent) &
                                         CRYPTO_TFM_REQ_MASK);
        return crypto_skcipher_setkey(child, key, keylen);
}

/*
 * We compute the tweak masks twice (both before and after the ECB encryption or
 * decryption) to avoid having to allocate a temporary buffer and/or make
 * mutliple calls to the 'ecb(..)' instance, which usually would be slower than
 * just doing the gf128mul_x_ble() calls again.
 */
static int xts_xor_tweak(struct skcipher_request *req, bool second_pass,
                         bool enc)
{
        struct xts_request_ctx *rctx = skcipher_request_ctx(req);
        struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
        const bool cts = (req->cryptlen % XTS_BLOCK_SIZE);
        const int bs = XTS_BLOCK_SIZE;
        struct skcipher_walk w;
        le128 t = rctx->t;
        int err;

        if (second_pass) {
                req = &rctx->subreq;
                /* set to our TFM to enforce correct alignment: */
                skcipher_request_set_tfm(req, tfm);
        }
        err = skcipher_walk_virt(&w, req, false);

        while (w.nbytes) {
                unsigned int avail = w.nbytes;
                le128 *wsrc;
                le128 *wdst;

                wsrc = w.src.virt.addr;
                wdst = w.dst.virt.addr;

                do {
                        if (unlikely(cts) &&
                            w.total - w.nbytes + avail < 2 * XTS_BLOCK_SIZE) {
                                if (!enc) {
                                        if (second_pass)
                                                rctx->t = t;
                                        gf128mul_x_ble(&t, &t);
                                }
                                le128_xor(wdst, &t, wsrc);
                                if (enc && second_pass)
                                        gf128mul_x_ble(&rctx->t, &t);
                                skcipher_walk_done(&w, avail - bs);
                                return 0;
                        }

                        le128_xor(wdst++, &t, wsrc++);
                        gf128mul_x_ble(&t, &t);
                } while ((avail -= bs) >= bs);

                err = skcipher_walk_done(&w, avail);
        }

        return err;
}

static int xts_xor_tweak_pre(struct skcipher_request *req, bool enc)
{
        return xts_xor_tweak(req, false, enc);
}

static int xts_xor_tweak_post(struct skcipher_request *req, bool enc)
{
        return xts_xor_tweak(req, true, enc);
}

static void xts_cts_done(void *data, int err)
{
        struct skcipher_request *req = data;
        le128 b;

        if (!err) {
                struct xts_request_ctx *rctx = skcipher_request_ctx(req);

                scatterwalk_map_and_copy(&b, rctx->tail, 0, XTS_BLOCK_SIZE, 0);
                le128_xor(&b, &rctx->t, &b);
                scatterwalk_map_and_copy(&b, rctx->tail, 0, XTS_BLOCK_SIZE, 1);
        }

        skcipher_request_complete(req, err);
}

static int xts_cts_final(struct skcipher_request *req,
                         int (*crypt)(struct skcipher_request *req))
{
        const struct xts_tfm_ctx *ctx =
                crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
        int offset = req->cryptlen & ~(XTS_BLOCK_SIZE - 1);
        struct xts_request_ctx *rctx = skcipher_request_ctx(req);
        struct skcipher_request *subreq = &rctx->subreq;
        int tail = req->cryptlen % XTS_BLOCK_SIZE;
        le128 b[2];
        int err;

        rctx->tail = scatterwalk_ffwd(rctx->sg, req->dst,
                                      offset - XTS_BLOCK_SIZE);

        scatterwalk_map_and_copy(b, rctx->tail, 0, XTS_BLOCK_SIZE, 0);
        b[1] = b[0];
        scatterwalk_map_and_copy(b, req->src, offset, tail, 0);

        le128_xor(b, &rctx->t, b);

        scatterwalk_map_and_copy(b, rctx->tail, 0, XTS_BLOCK_SIZE + tail, 1);

        skcipher_request_set_tfm(subreq, ctx->child);
        skcipher_request_set_callback(subreq, req->base.flags, xts_cts_done,
                                      req);
        skcipher_request_set_crypt(subreq, rctx->tail, rctx->tail,
                                   XTS_BLOCK_SIZE, NULL);

        err = crypt(subreq);
        if (err)
                return err;

        scatterwalk_map_and_copy(b, rctx->tail, 0, XTS_BLOCK_SIZE, 0);
        le128_xor(b, &rctx->t, b);
        scatterwalk_map_and_copy(b, rctx->tail, 0, XTS_BLOCK_SIZE, 1);

        return 0;
}

static void xts_encrypt_done(void *data, int err)
{
        struct skcipher_request *req = data;

        if (!err) {
                struct xts_request_ctx *rctx = skcipher_request_ctx(req);

                rctx->subreq.base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
                err = xts_xor_tweak_post(req, true);

                if (!err && unlikely(req->cryptlen % XTS_BLOCK_SIZE)) {
                        err = xts_cts_final(req, crypto_skcipher_encrypt);
                        if (err == -EINPROGRESS || err == -EBUSY)
                                return;
                }
        }

        skcipher_request_complete(req, err);
}

static void xts_decrypt_done(void *data, int err)
{
        struct skcipher_request *req = data;

        if (!err) {
                struct xts_request_ctx *rctx = skcipher_request_ctx(req);

                rctx->subreq.base.flags &= CRYPTO_TFM_REQ_MAY_BACKLOG;
                err = xts_xor_tweak_post(req, false);

                if (!err && unlikely(req->cryptlen % XTS_BLOCK_SIZE)) {
                        err = xts_cts_final(req, crypto_skcipher_decrypt);
                        if (err == -EINPROGRESS || err == -EBUSY)
                                return;
                }
        }

        skcipher_request_complete(req, err);
}

static int xts_init_crypt(struct skcipher_request *req,
                          crypto_completion_t compl)
{
        const struct xts_tfm_ctx *ctx =
                crypto_skcipher_ctx(crypto_skcipher_reqtfm(req));
        struct xts_request_ctx *rctx = skcipher_request_ctx(req);
        struct skcipher_request *subreq = &rctx->subreq;

        if (req->cryptlen < XTS_BLOCK_SIZE)
                return -EINVAL;

        skcipher_request_set_tfm(subreq, ctx->child);
        skcipher_request_set_callback(subreq, req->base.flags, compl, req);
        skcipher_request_set_crypt(subreq, req->dst, req->dst,
                                   req->cryptlen & ~(XTS_BLOCK_SIZE - 1), NULL);

        /* calculate first value of T */
        crypto_cipher_encrypt_one(ctx->tweak, (u8 *)&rctx->t, req->iv);

        return 0;
}

static int xts_encrypt(struct skcipher_request *req)
{
        struct xts_request_ctx *rctx = skcipher_request_ctx(req);
        struct skcipher_request *subreq = &rctx->subreq;
        int err;

        err = xts_init_crypt(req, xts_encrypt_done) ?:
              xts_xor_tweak_pre(req, true) ?:
              crypto_skcipher_encrypt(subreq) ?:
              xts_xor_tweak_post(req, true);

        if (err || likely((req->cryptlen % XTS_BLOCK_SIZE) == 0))
                return err;

        return xts_cts_final(req, crypto_skcipher_encrypt);
}

static int xts_decrypt(struct skcipher_request *req)
{
        struct xts_request_ctx *rctx = skcipher_request_ctx(req);
        struct skcipher_request *subreq = &rctx->subreq;
        int err;

        err = xts_init_crypt(req, xts_decrypt_done) ?:
              xts_xor_tweak_pre(req, false) ?:
              crypto_skcipher_decrypt(subreq) ?:
              xts_xor_tweak_post(req, false);

        if (err || likely((req->cryptlen % XTS_BLOCK_SIZE) == 0))
                return err;

        return xts_cts_final(req, crypto_skcipher_decrypt);
}

static int xts_init_tfm(struct crypto_skcipher *tfm)
{
        struct skcipher_instance *inst = skcipher_alg_instance(tfm);
        struct xts_instance_ctx *ictx = skcipher_instance_ctx(inst);
        struct xts_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);
        struct crypto_skcipher *child;
        struct crypto_cipher *tweak;

        child = crypto_spawn_skcipher(&ictx->spawn);
        if (IS_ERR(child))
                return PTR_ERR(child);

        ctx->child = child;

        tweak = crypto_spawn_cipher(&ictx->tweak_spawn);
        if (IS_ERR(tweak)) {
                crypto_free_skcipher(ctx->child);
                return PTR_ERR(tweak);
        }

        ctx->tweak = tweak;

        crypto_skcipher_set_reqsize(tfm, crypto_skcipher_reqsize(child) +
                                         sizeof(struct xts_request_ctx));

        return 0;
}

static void xts_exit_tfm(struct crypto_skcipher *tfm)
{
        struct xts_tfm_ctx *ctx = crypto_skcipher_ctx(tfm);

        crypto_free_skcipher(ctx->child);
        crypto_free_cipher(ctx->tweak);
}

static void xts_free_instance(struct skcipher_instance *inst)
{
        struct xts_instance_ctx *ictx = skcipher_instance_ctx(inst);

        crypto_drop_skcipher(&ictx->spawn);
        crypto_drop_cipher(&ictx->tweak_spawn);
        kfree(inst);
}

static int xts_create(struct crypto_template *tmpl, struct rtattr **tb)
{
        struct skcipher_alg_common *alg;
        char name[CRYPTO_MAX_ALG_NAME];
        struct skcipher_instance *inst;
        struct xts_instance_ctx *ctx;
        const char *cipher_name;
        u32 mask;
        int err;

        err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER, &mask);
        if (err)
                return err;

        cipher_name = crypto_attr_alg_name(tb[1]);
        if (IS_ERR(cipher_name))
                return PTR_ERR(cipher_name);

        inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
        if (!inst)
                return -ENOMEM;

        ctx = skcipher_instance_ctx(inst);

        err = crypto_grab_skcipher(&ctx->spawn, skcipher_crypto_instance(inst),
                                   cipher_name, 0, mask);
        if (err == -ENOENT) {
                err = -ENAMETOOLONG;
                if (snprintf(name, CRYPTO_MAX_ALG_NAME, "ecb(%s)",
                             cipher_name) >= CRYPTO_MAX_ALG_NAME)
                        goto err_free_inst;

                err = crypto_grab_skcipher(&ctx->spawn,
                                           skcipher_crypto_instance(inst),
                                           name, 0, mask);
        }

        if (err)
                goto err_free_inst;

        alg = crypto_spawn_skcipher_alg_common(&ctx->spawn);

        err = -EINVAL;
        if (alg->base.cra_blocksize != XTS_BLOCK_SIZE)
                goto err_free_inst;

        if (alg->ivsize)
                goto err_free_inst;

        err = crypto_inst_setname(skcipher_crypto_instance(inst), "xts",
                                  &alg->base);
        if (err)
                goto err_free_inst;

        err = -EINVAL;
        cipher_name = alg->base.cra_name;

        /* Alas we screwed up the naming so we have to mangle the
         * cipher name.
         */
        if (!strncmp(cipher_name, "ecb(", 4)) {
                int len;

                len = strscpy(name, cipher_name + 4, sizeof(name));
                if (len < 2)
                        goto err_free_inst;

                if (name[len - 1] != ')')
                        goto err_free_inst;

                name[len - 1] = 0;

                if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
                             "xts(%s)", name) >= CRYPTO_MAX_ALG_NAME) {
                        err = -ENAMETOOLONG;
                        goto err_free_inst;
                }
        } else
                goto err_free_inst;

        err = crypto_grab_cipher(&ctx->tweak_spawn,
                                 skcipher_crypto_instance(inst), name, 0, mask);
        if (err)
                goto err_free_inst;

        inst->alg.base.cra_priority = alg->base.cra_priority;
        inst->alg.base.cra_blocksize = XTS_BLOCK_SIZE;
        inst->alg.base.cra_alignmask = alg->base.cra_alignmask |
                                       (__alignof__(u64) - 1);

        inst->alg.ivsize = XTS_BLOCK_SIZE;
        inst->alg.min_keysize = alg->min_keysize * 2;
        inst->alg.max_keysize = alg->max_keysize * 2;

        inst->alg.base.cra_ctxsize = sizeof(struct xts_tfm_ctx);

        inst->alg.init = xts_init_tfm;
        inst->alg.exit = xts_exit_tfm;

        inst->alg.setkey = xts_setkey;
        inst->alg.encrypt = xts_encrypt;
        inst->alg.decrypt = xts_decrypt;

        inst->free = xts_free_instance;

        err = skcipher_register_instance(tmpl, inst);
        if (err) {
err_free_inst:
                xts_free_instance(inst);
        }
        return err;
}

static struct crypto_template xts_tmpl = {
        .name = "xts",
        .create = xts_create,
        .module = THIS_MODULE,
};

static int __init xts_module_init(void)
{
        return crypto_register_template(&xts_tmpl);
}

static void __exit xts_module_exit(void)
{
        crypto_unregister_template(&xts_tmpl);
}

subsys_initcall(xts_module_init);
module_exit(xts_module_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("XTS block cipher mode");
MODULE_ALIAS_CRYPTO("xts");
MODULE_IMPORT_NS(CRYPTO_INTERNAL);
MODULE_SOFTDEP("pre: ecb");





































































































































































































































































































































   31 





   31 
   31 








   25 









   25 








































































































































































































































































































































































































































































































































    4 
    4 






    4 

    4 























































































































































































































































































   17 












    1 












    3 
    3 

    4 








    4 
    2 


    8 



    5 
    3 











   16 

   19 





    6 

    4 
















   35 




    1 


   34 



   30 




    3 





   25 














    8 





   30 





    3 












   30 


    1 
    1 



    2 
    2 



    2 






   14 
   16 


    2 
    1 

    3 








   44 











    1 



    1 
    4 



    2 











   36 














    1 










   35 









   31 



   31 

   31 





    5 

    1 
    4 





    9 




    5 
    4 









   24 








    6 







   24 


    8 





    4 




    6 






    6 





    8 



    8 








   24 
   24 












   25 












   25 









    1 



   24 






   24 















   24 






   25 


   25 




















   31 



   31 



   31 
   31 
   31 

























  136 


  136 
























































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* -
 * net/sched/act_ct.c  Connection Tracking action
 *
 * Authors:   Paul Blakey <paulb@mellanox.com>
 *            Yossi Kuperman <yossiku@mellanox.com>
 *            Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/pkt_cls.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/rhashtable.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/pkt_cls.h>
#include <net/act_api.h>
#include <net/ip.h>
#include <net/ipv6_frag.h>
#include <uapi/linux/tc_act/tc_ct.h>
#include <net/tc_act/tc_ct.h>
#include <net/tc_wrapper.h>

#include <net/netfilter/nf_flow_table.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
#include <net/netfilter/nf_conntrack_act_ct.h>
#include <net/netfilter/nf_conntrack_seqadj.h>
#include <uapi/linux/netfilter/nf_nat.h>

static struct workqueue_struct *act_ct_wq;
static struct rhashtable zones_ht;
static DEFINE_MUTEX(zones_mutex);

struct zones_ht_key {
        struct net *net;
        u16 zone;
        /* Note : pad[] must be the last field. */
        u8  pad[];
};

struct tcf_ct_flow_table {
        struct rhash_head node; /* In zones tables */

        struct rcu_work rwork;
        struct nf_flowtable nf_ft;
        refcount_t ref;
        struct zones_ht_key key;

        bool dying;
};

static const struct rhashtable_params zones_params = {
        .head_offset = offsetof(struct tcf_ct_flow_table, node),
        .key_offset = offsetof(struct tcf_ct_flow_table, key),
        .key_len = offsetof(struct zones_ht_key, pad),
        .automatic_shrinking = true,
};

static struct flow_action_entry *
tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action)
{
        int i = flow_action->num_entries++;

        return &flow_action->entries[i];
}

static void tcf_ct_add_mangle_action(struct flow_action *action,
                                     enum flow_action_mangle_base htype,
                                     u32 offset,
                                     u32 mask,
                                     u32 val)
{
        struct flow_action_entry *entry;

        entry = tcf_ct_flow_table_flow_action_get_next(action);
        entry->id = FLOW_ACTION_MANGLE;
        entry->mangle.htype = htype;
        entry->mangle.mask = ~mask;
        entry->mangle.offset = offset;
        entry->mangle.val = val;
}

/* The following nat helper functions check if the inverted reverse tuple
 * (target) is different then the current dir tuple - meaning nat for ports
 * and/or ip is needed, and add the relevant mangle actions.
 */
static void
tcf_ct_flow_table_add_action_nat_ipv4(const struct nf_conntrack_tuple *tuple,
                                      struct nf_conntrack_tuple target,
                                      struct flow_action *action)
{
        if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3)))
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4,
                                         offsetof(struct iphdr, saddr),
                                         0xFFFFFFFF,
                                         be32_to_cpu(target.src.u3.ip));
        if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3)))
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4,
                                         offsetof(struct iphdr, daddr),
                                         0xFFFFFFFF,
                                         be32_to_cpu(target.dst.u3.ip));
}

static void
tcf_ct_add_ipv6_addr_mangle_action(struct flow_action *action,
                                   union nf_inet_addr *addr,
                                   u32 offset)
{
        int i;

        for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i++)
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
                                         i * sizeof(u32) + offset,
                                         0xFFFFFFFF, be32_to_cpu(addr->ip6[i]));
}

static void
tcf_ct_flow_table_add_action_nat_ipv6(const struct nf_conntrack_tuple *tuple,
                                      struct nf_conntrack_tuple target,
                                      struct flow_action *action)
{
        if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3)))
                tcf_ct_add_ipv6_addr_mangle_action(action, &target.src.u3,
                                                   offsetof(struct ipv6hdr,
                                                            saddr));
        if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3)))
                tcf_ct_add_ipv6_addr_mangle_action(action, &target.dst.u3,
                                                   offsetof(struct ipv6hdr,
                                                            daddr));
}

static void
tcf_ct_flow_table_add_action_nat_tcp(const struct nf_conntrack_tuple *tuple,
                                     struct nf_conntrack_tuple target,
                                     struct flow_action *action)
{
        __be16 target_src = target.src.u.tcp.port;
        __be16 target_dst = target.dst.u.tcp.port;

        if (target_src != tuple->src.u.tcp.port)
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP,
                                         offsetof(struct tcphdr, source),
                                         0xFFFF, be16_to_cpu(target_src));
        if (target_dst != tuple->dst.u.tcp.port)
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP,
                                         offsetof(struct tcphdr, dest),
                                         0xFFFF, be16_to_cpu(target_dst));
}

static void
tcf_ct_flow_table_add_action_nat_udp(const struct nf_conntrack_tuple *tuple,
                                     struct nf_conntrack_tuple target,
                                     struct flow_action *action)
{
        __be16 target_src = target.src.u.udp.port;
        __be16 target_dst = target.dst.u.udp.port;

        if (target_src != tuple->src.u.udp.port)
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP,
                                         offsetof(struct udphdr, source),
                                         0xFFFF, be16_to_cpu(target_src));
        if (target_dst != tuple->dst.u.udp.port)
                tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP,
                                         offsetof(struct udphdr, dest),
                                         0xFFFF, be16_to_cpu(target_dst));
}

static void tcf_ct_flow_table_add_action_meta(struct nf_conn *ct,
                                              enum ip_conntrack_dir dir,
                                              enum ip_conntrack_info ctinfo,
                                              struct flow_action *action)
{
        struct nf_conn_labels *ct_labels;
        struct flow_action_entry *entry;
        u32 *act_ct_labels;

        entry = tcf_ct_flow_table_flow_action_get_next(action);
        entry->id = FLOW_ACTION_CT_METADATA;
#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
        entry->ct_metadata.mark = READ_ONCE(ct->mark);
#endif
        /* aligns with the CT reference on the SKB nf_ct_set */
        entry->ct_metadata.cookie = (unsigned long)ct | ctinfo;
        entry->ct_metadata.orig_dir = dir == IP_CT_DIR_ORIGINAL;

        act_ct_labels = entry->ct_metadata.labels;
        ct_labels = nf_ct_labels_find(ct);
        if (ct_labels)
                memcpy(act_ct_labels, ct_labels->bits, NF_CT_LABELS_MAX_SIZE);
        else
                memset(act_ct_labels, 0, NF_CT_LABELS_MAX_SIZE);
}

static int tcf_ct_flow_table_add_action_nat(struct net *net,
                                            struct nf_conn *ct,
                                            enum ip_conntrack_dir dir,
                                            struct flow_action *action)
{
        const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
        struct nf_conntrack_tuple target;

        if (!(ct->status & IPS_NAT_MASK))
                return 0;

        nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple);

        switch (tuple->src.l3num) {
        case NFPROTO_IPV4:
                tcf_ct_flow_table_add_action_nat_ipv4(tuple, target,
                                                      action);
                break;
        case NFPROTO_IPV6:
                tcf_ct_flow_table_add_action_nat_ipv6(tuple, target,
                                                      action);
                break;
        default:
                return -EOPNOTSUPP;
        }

        switch (nf_ct_protonum(ct)) {
        case IPPROTO_TCP:
                tcf_ct_flow_table_add_action_nat_tcp(tuple, target, action);
                break;
        case IPPROTO_UDP:
                tcf_ct_flow_table_add_action_nat_udp(tuple, target, action);
                break;
        default:
                return -EOPNOTSUPP;
        }

        return 0;
}

static int tcf_ct_flow_table_fill_actions(struct net *net,
                                          struct flow_offload *flow,
                                          enum flow_offload_tuple_dir tdir,
                                          struct nf_flow_rule *flow_rule)
{
        struct flow_action *action = &flow_rule->rule->action;
        int num_entries = action->num_entries;
        struct nf_conn *ct = flow->ct;
        enum ip_conntrack_info ctinfo;
        enum ip_conntrack_dir dir;
        int i, err;

        switch (tdir) {
        case FLOW_OFFLOAD_DIR_ORIGINAL:
                dir = IP_CT_DIR_ORIGINAL;
                ctinfo = test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
                        IP_CT_ESTABLISHED : IP_CT_NEW;
                if (ctinfo == IP_CT_ESTABLISHED)
                        set_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags);
                break;
        case FLOW_OFFLOAD_DIR_REPLY:
                dir = IP_CT_DIR_REPLY;
                ctinfo = IP_CT_ESTABLISHED_REPLY;
                break;
        default:
                return -EOPNOTSUPP;
        }

        err = tcf_ct_flow_table_add_action_nat(net, ct, dir, action);
        if (err)
                goto err_nat;

        tcf_ct_flow_table_add_action_meta(ct, dir, ctinfo, action);
        return 0;

err_nat:
        /* Clear filled actions */
        for (i = num_entries; i < action->num_entries; i++)
                memset(&action->entries[i], 0, sizeof(action->entries[i]));
        action->num_entries = num_entries;

        return err;
}

static bool tcf_ct_flow_is_outdated(const struct flow_offload *flow)
{
        return test_bit(IPS_SEEN_REPLY_BIT, &flow->ct->status) &&
               test_bit(IPS_HW_OFFLOAD_BIT, &flow->ct->status) &&
               !test_bit(NF_FLOW_HW_PENDING, &flow->flags) &&
               !test_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags);
}

static void tcf_ct_flow_table_get_ref(struct tcf_ct_flow_table *ct_ft);

static void tcf_ct_nf_get(struct nf_flowtable *ft)
{
        struct tcf_ct_flow_table *ct_ft =
                container_of(ft, struct tcf_ct_flow_table, nf_ft);

        tcf_ct_flow_table_get_ref(ct_ft);
}

static void tcf_ct_flow_table_put(struct tcf_ct_flow_table *ct_ft);

static void tcf_ct_nf_put(struct nf_flowtable *ft)
{
        struct tcf_ct_flow_table *ct_ft =
                container_of(ft, struct tcf_ct_flow_table, nf_ft);

        tcf_ct_flow_table_put(ct_ft);
}

static struct nf_flowtable_type flowtable_ct = {
        .gc                = tcf_ct_flow_is_outdated,
        .action                = tcf_ct_flow_table_fill_actions,
        .get                = tcf_ct_nf_get,
        .put                = tcf_ct_nf_put,
        .owner                = THIS_MODULE,
};

static int tcf_ct_flow_table_get(struct net *net, struct tcf_ct_params *params)
{
        struct zones_ht_key key = { .net = net, .zone = params->zone };
        struct tcf_ct_flow_table *ct_ft;
        int err = -ENOMEM;

        mutex_lock(&zones_mutex);
        ct_ft = rhashtable_lookup_fast(&zones_ht, &key, zones_params);
        if (ct_ft && refcount_inc_not_zero(&ct_ft->ref))
                goto out_unlock;

        ct_ft = kzalloc(sizeof(*ct_ft), GFP_KERNEL);
        if (!ct_ft)
                goto err_alloc;
        refcount_set(&ct_ft->ref, 1);

        ct_ft->key = key;
        err = rhashtable_insert_fast(&zones_ht, &ct_ft->node, zones_params);
        if (err)
                goto err_insert;

        ct_ft->nf_ft.type = &flowtable_ct;
        ct_ft->nf_ft.flags |= NF_FLOWTABLE_HW_OFFLOAD |
                              NF_FLOWTABLE_COUNTER;
        err = nf_flow_table_init(&ct_ft->nf_ft);
        if (err)
                goto err_init;
        write_pnet(&ct_ft->nf_ft.net, net);

        __module_get(THIS_MODULE);
out_unlock:
        params->ct_ft = ct_ft;
        params->nf_ft = &ct_ft->nf_ft;
        mutex_unlock(&zones_mutex);

        return 0;

err_init:
        rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
err_insert:
        kfree(ct_ft);
err_alloc:
        mutex_unlock(&zones_mutex);
        return err;
}

static void tcf_ct_flow_table_get_ref(struct tcf_ct_flow_table *ct_ft)
{
        refcount_inc(&ct_ft->ref);
}

static void tcf_ct_flow_table_cleanup_work(struct work_struct *work)
{
        struct tcf_ct_flow_table *ct_ft;
        struct flow_block *block;

        ct_ft = container_of(to_rcu_work(work), struct tcf_ct_flow_table,
                             rwork);
        nf_flow_table_free(&ct_ft->nf_ft);

        block = &ct_ft->nf_ft.flow_block;
        down_write(&ct_ft->nf_ft.flow_block_lock);
        WARN_ON(!list_empty(&block->cb_list));
        up_write(&ct_ft->nf_ft.flow_block_lock);
        kfree(ct_ft);

        module_put(THIS_MODULE);
}

static void tcf_ct_flow_table_put(struct tcf_ct_flow_table *ct_ft)
{
        if (refcount_dec_and_test(&ct_ft->ref)) {
                rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
                INIT_RCU_WORK(&ct_ft->rwork, tcf_ct_flow_table_cleanup_work);
                queue_rcu_work(act_ct_wq, &ct_ft->rwork);
        }
}

static void tcf_ct_flow_tc_ifidx(struct flow_offload *entry,
                                 struct nf_conn_act_ct_ext *act_ct_ext, u8 dir)
{
        entry->tuplehash[dir].tuple.xmit_type = FLOW_OFFLOAD_XMIT_TC;
        entry->tuplehash[dir].tuple.tc.iifidx = act_ct_ext->ifindex[dir];
}

static void tcf_ct_flow_ct_ext_ifidx_update(struct flow_offload *entry)
{
        struct nf_conn_act_ct_ext *act_ct_ext;

        act_ct_ext = nf_conn_act_ct_ext_find(entry->ct);
        if (act_ct_ext) {
                tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_ORIGINAL);
                tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_REPLY);
        }
}

static void tcf_ct_flow_table_add(struct tcf_ct_flow_table *ct_ft,
                                  struct nf_conn *ct,
                                  bool tcp, bool bidirectional)
{
        struct nf_conn_act_ct_ext *act_ct_ext;
        struct flow_offload *entry;
        int err;

        if (test_and_set_bit(IPS_OFFLOAD_BIT, &ct->status))
                return;

        entry = flow_offload_alloc(ct);
        if (!entry) {
                WARN_ON_ONCE(1);
                goto err_alloc;
        }

        if (tcp) {
                ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
                ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
        }
        if (bidirectional)
                __set_bit(NF_FLOW_HW_BIDIRECTIONAL, &entry->flags);

        act_ct_ext = nf_conn_act_ct_ext_find(ct);
        if (act_ct_ext) {
                tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_ORIGINAL);
                tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_REPLY);
        }

        err = flow_offload_add(&ct_ft->nf_ft, entry);
        if (err)
                goto err_add;

        return;

err_add:
        flow_offload_free(entry);
err_alloc:
        clear_bit(IPS_OFFLOAD_BIT, &ct->status);
}

static void tcf_ct_flow_table_process_conn(struct tcf_ct_flow_table *ct_ft,
                                           struct nf_conn *ct,
                                           enum ip_conntrack_info ctinfo)
{
        bool tcp = false, bidirectional = true;

        switch (nf_ct_protonum(ct)) {
        case IPPROTO_TCP:
                if ((ctinfo != IP_CT_ESTABLISHED &&
                     ctinfo != IP_CT_ESTABLISHED_REPLY) ||
                    !test_bit(IPS_ASSURED_BIT, &ct->status) ||
                    ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED)
                        return;

                tcp = true;
                break;
        case IPPROTO_UDP:
                if (!nf_ct_is_confirmed(ct))
                        return;
                if (!test_bit(IPS_ASSURED_BIT, &ct->status))
                        bidirectional = false;
                break;
#ifdef CONFIG_NF_CT_PROTO_GRE
        case IPPROTO_GRE: {
                struct nf_conntrack_tuple *tuple;

                if ((ctinfo != IP_CT_ESTABLISHED &&
                     ctinfo != IP_CT_ESTABLISHED_REPLY) ||
                    !test_bit(IPS_ASSURED_BIT, &ct->status) ||
                    ct->status & IPS_NAT_MASK)
                        return;

                tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
                /* No support for GRE v1 */
                if (tuple->src.u.gre.key || tuple->dst.u.gre.key)
                        return;
                break;
        }
#endif
        default:
                return;
        }

        if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) ||
            ct->status & IPS_SEQ_ADJUST)
                return;

        tcf_ct_flow_table_add(ct_ft, ct, tcp, bidirectional);
}

static bool
tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb,
                                  struct flow_offload_tuple *tuple,
                                  struct tcphdr **tcph)
{
        struct flow_ports *ports;
        unsigned int thoff;
        struct iphdr *iph;
        size_t hdrsize;
        u8 ipproto;

        if (!pskb_network_may_pull(skb, sizeof(*iph)))
                return false;

        iph = ip_hdr(skb);
        thoff = iph->ihl * 4;

        if (ip_is_fragment(iph) ||
            unlikely(thoff != sizeof(struct iphdr)))
                return false;

        ipproto = iph->protocol;
        switch (ipproto) {
        case IPPROTO_TCP:
                hdrsize = sizeof(struct tcphdr);
                break;
        case IPPROTO_UDP:
                hdrsize = sizeof(*ports);
                break;
#ifdef CONFIG_NF_CT_PROTO_GRE
        case IPPROTO_GRE:
                hdrsize = sizeof(struct gre_base_hdr);
                break;
#endif
        default:
                return false;
        }

        if (iph->ttl <= 1)
                return false;

        if (!pskb_network_may_pull(skb, thoff + hdrsize))
                return false;

        switch (ipproto) {
        case IPPROTO_TCP:
                *tcph = (void *)(skb_network_header(skb) + thoff);
                fallthrough;
        case IPPROTO_UDP:
                ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
                tuple->src_port = ports->source;
                tuple->dst_port = ports->dest;
                break;
        case IPPROTO_GRE: {
                struct gre_base_hdr *greh;

                greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
                if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
                        return false;
                break;
        }
        }

        iph = ip_hdr(skb);

        tuple->src_v4.s_addr = iph->saddr;
        tuple->dst_v4.s_addr = iph->daddr;
        tuple->l3proto = AF_INET;
        tuple->l4proto = ipproto;

        return true;
}

static bool
tcf_ct_flow_table_fill_tuple_ipv6(struct sk_buff *skb,
                                  struct flow_offload_tuple *tuple,
                                  struct tcphdr **tcph)
{
        struct flow_ports *ports;
        struct ipv6hdr *ip6h;
        unsigned int thoff;
        size_t hdrsize;
        u8 nexthdr;

        if (!pskb_network_may_pull(skb, sizeof(*ip6h)))
                return false;

        ip6h = ipv6_hdr(skb);
        thoff = sizeof(*ip6h);

        nexthdr = ip6h->nexthdr;
        switch (nexthdr) {
        case IPPROTO_TCP:
                hdrsize = sizeof(struct tcphdr);
                break;
        case IPPROTO_UDP:
                hdrsize = sizeof(*ports);
                break;
#ifdef CONFIG_NF_CT_PROTO_GRE
        case IPPROTO_GRE:
                hdrsize = sizeof(struct gre_base_hdr);
                break;
#endif
        default:
                return false;
        }

        if (ip6h->hop_limit <= 1)
                return false;

        if (!pskb_network_may_pull(skb, thoff + hdrsize))
                return false;

        switch (nexthdr) {
        case IPPROTO_TCP:
                *tcph = (void *)(skb_network_header(skb) + thoff);
                fallthrough;
        case IPPROTO_UDP:
                ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
                tuple->src_port = ports->source;
                tuple->dst_port = ports->dest;
                break;
        case IPPROTO_GRE: {
                struct gre_base_hdr *greh;

                greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
                if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
                        return false;
                break;
        }
        }

        ip6h = ipv6_hdr(skb);

        tuple->src_v6 = ip6h->saddr;
        tuple->dst_v6 = ip6h->daddr;
        tuple->l3proto = AF_INET6;
        tuple->l4proto = nexthdr;

        return true;
}

static bool tcf_ct_flow_table_lookup(struct tcf_ct_params *p,
                                     struct sk_buff *skb,
                                     u8 family)
{
        struct nf_flowtable *nf_ft = &p->ct_ft->nf_ft;
        struct flow_offload_tuple_rhash *tuplehash;
        struct flow_offload_tuple tuple = {};
        enum ip_conntrack_info ctinfo;
        struct tcphdr *tcph = NULL;
        bool force_refresh = false;
        struct flow_offload *flow;
        struct nf_conn *ct;
        u8 dir;

        switch (family) {
        case NFPROTO_IPV4:
                if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph))
                        return false;
                break;
        case NFPROTO_IPV6:
                if (!tcf_ct_flow_table_fill_tuple_ipv6(skb, &tuple, &tcph))
                        return false;
                break;
        default:
                return false;
        }

        tuplehash = flow_offload_lookup(nf_ft, &tuple);
        if (!tuplehash)
                return false;

        dir = tuplehash->tuple.dir;
        flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
        ct = flow->ct;

        if (dir == FLOW_OFFLOAD_DIR_REPLY &&
            !test_bit(NF_FLOW_HW_BIDIRECTIONAL, &flow->flags)) {
                /* Only offload reply direction after connection became
                 * assured.
                 */
                if (test_bit(IPS_ASSURED_BIT, &ct->status))
                        set_bit(NF_FLOW_HW_BIDIRECTIONAL, &flow->flags);
                else if (test_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags))
                        /* If flow_table flow has already been updated to the
                         * established state, then don't refresh.
                         */
                        return false;
                force_refresh = true;
        }

        if (tcph && (unlikely(tcph->fin || tcph->rst))) {
                flow_offload_teardown(flow);
                return false;
        }

        if (dir == FLOW_OFFLOAD_DIR_ORIGINAL)
                ctinfo = test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
                        IP_CT_ESTABLISHED : IP_CT_NEW;
        else
                ctinfo = IP_CT_ESTABLISHED_REPLY;

        nf_conn_act_ct_ext_fill(skb, ct, ctinfo);
        tcf_ct_flow_ct_ext_ifidx_update(flow);
        flow_offload_refresh(nf_ft, flow, force_refresh);
        if (!test_bit(IPS_ASSURED_BIT, &ct->status)) {
                /* Process this flow in SW to allow promoting to ASSURED */
                return false;
        }

        nf_conntrack_get(&ct->ct_general);
        nf_ct_set(skb, ct, ctinfo);
        if (nf_ft->flags & NF_FLOWTABLE_COUNTER)
                nf_ct_acct_update(ct, dir, skb->len);

        return true;
}

static int tcf_ct_flow_tables_init(void)
{
        return rhashtable_init(&zones_ht, &zones_params);
}

static void tcf_ct_flow_tables_uninit(void)
{
        rhashtable_destroy(&zones_ht);
}

static struct tc_action_ops act_ct_ops;

struct tc_ct_action_net {
        struct tc_action_net tn; /* Must be first */
};

/* Determine whether skb->_nfct is equal to the result of conntrack lookup. */
static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb,
                                   struct tcf_ct_params *p)
{
        enum ip_conntrack_info ctinfo;
        struct nf_conn *ct;

        ct = nf_ct_get(skb, &ctinfo);
        if (!ct)
                return false;
        if (!net_eq(net, read_pnet(&ct->ct_net)))
                goto drop_ct;
        if (nf_ct_zone(ct)->id != p->zone)
                goto drop_ct;
        if (p->helper) {
                struct nf_conn_help *help;

                help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
                if (help && rcu_access_pointer(help->helper) != p->helper)
                        goto drop_ct;
        }

        /* Force conntrack entry direction. */
        if ((p->ct_action & TCA_CT_ACT_FORCE) &&
            CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) {
                if (nf_ct_is_confirmed(ct))
                        nf_ct_kill(ct);

                goto drop_ct;
        }

        return true;

drop_ct:
        nf_ct_put(ct);
        nf_ct_set(skb, NULL, IP_CT_UNTRACKED);

        return false;
}

static u8 tcf_ct_skb_nf_family(struct sk_buff *skb)
{
        u8 family = NFPROTO_UNSPEC;

        switch (skb_protocol(skb, true)) {
        case htons(ETH_P_IP):
                family = NFPROTO_IPV4;
                break;
        case htons(ETH_P_IPV6):
                family = NFPROTO_IPV6;
                break;
        default:
                break;
        }

        return family;
}

static int tcf_ct_ipv4_is_fragment(struct sk_buff *skb, bool *frag)
{
        unsigned int len;

        len =  skb_network_offset(skb) + sizeof(struct iphdr);
        if (unlikely(skb->len < len))
                return -EINVAL;
        if (unlikely(!pskb_may_pull(skb, len)))
                return -ENOMEM;

        *frag = ip_is_fragment(ip_hdr(skb));
        return 0;
}

static int tcf_ct_ipv6_is_fragment(struct sk_buff *skb, bool *frag)
{
        unsigned int flags = 0, len, payload_ofs = 0;
        unsigned short frag_off;
        int nexthdr;

        len =  skb_network_offset(skb) + sizeof(struct ipv6hdr);
        if (unlikely(skb->len < len))
                return -EINVAL;
        if (unlikely(!pskb_may_pull(skb, len)))
                return -ENOMEM;

        nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags);
        if (unlikely(nexthdr < 0))
                return -EPROTO;

        *frag = flags & IP6_FH_F_FRAG;
        return 0;
}

static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb,
                                   u8 family, u16 zone, bool *defrag)
{
        enum ip_conntrack_info ctinfo;
        struct nf_conn *ct;
        int err = 0;
        bool frag;
        u8 proto;
        u16 mru;

        /* Previously seen (loopback)? Ignore. */
        ct = nf_ct_get(skb, &ctinfo);
        if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED)
                return 0;

        if (family == NFPROTO_IPV4)
                err = tcf_ct_ipv4_is_fragment(skb, &frag);
        else
                err = tcf_ct_ipv6_is_fragment(skb, &frag);
        if (err || !frag)
                return err;

        err = nf_ct_handle_fragments(net, skb, zone, family, &proto, &mru);
        if (err)
                return err;

        *defrag = true;
        tc_skb_cb(skb)->mru = mru;

        return 0;
}

static void tcf_ct_params_free(struct tcf_ct_params *params)
{
        if (params->helper) {
#if IS_ENABLED(CONFIG_NF_NAT)
                if (params->ct_action & TCA_CT_ACT_NAT)
                        nf_nat_helper_put(params->helper);
#endif
                nf_conntrack_helper_put(params->helper);
        }
        if (params->ct_ft)
                tcf_ct_flow_table_put(params->ct_ft);
        if (params->tmpl) {
                if (params->put_labels)
                        nf_connlabels_put(nf_ct_net(params->tmpl));

                nf_ct_put(params->tmpl);
        }

        kfree(params);
}

static void tcf_ct_params_free_rcu(struct rcu_head *head)
{
        struct tcf_ct_params *params;

        params = container_of(head, struct tcf_ct_params, rcu);
        tcf_ct_params_free(params);
}

static void tcf_ct_act_set_mark(struct nf_conn *ct, u32 mark, u32 mask)
{
#if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
        u32 new_mark;

        if (!mask)
                return;

        new_mark = mark | (READ_ONCE(ct->mark) & ~(mask));
        if (READ_ONCE(ct->mark) != new_mark) {
                WRITE_ONCE(ct->mark, new_mark);
                if (nf_ct_is_confirmed(ct))
                        nf_conntrack_event_cache(IPCT_MARK, ct);
        }
#endif
}

static void tcf_ct_act_set_labels(struct nf_conn *ct,
                                  u32 *labels,
                                  u32 *labels_m)
{
#if IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)
        size_t labels_sz = sizeof_field(struct tcf_ct_params, labels);

        if (!memchr_inv(labels_m, 0, labels_sz))
                return;

        nf_connlabels_replace(ct, labels, labels_m, 4);
#endif
}

static int tcf_ct_act_nat(struct sk_buff *skb,
                          struct nf_conn *ct,
                          enum ip_conntrack_info ctinfo,
                          int ct_action,
                          struct nf_nat_range2 *range,
                          bool commit)
{
#if IS_ENABLED(CONFIG_NF_NAT)
        int err, action = 0;

        if (!(ct_action & TCA_CT_ACT_NAT))
                return NF_ACCEPT;
        if (ct_action & TCA_CT_ACT_NAT_SRC)
                action |= BIT(NF_NAT_MANIP_SRC);
        if (ct_action & TCA_CT_ACT_NAT_DST)
                action |= BIT(NF_NAT_MANIP_DST);

        err = nf_ct_nat(skb, ct, ctinfo, &action, range, commit);
        if (err != NF_ACCEPT)
                return err & NF_VERDICT_MASK;

        if (action & BIT(NF_NAT_MANIP_SRC))
                tc_skb_cb(skb)->post_ct_snat = 1;
        if (action & BIT(NF_NAT_MANIP_DST))
                tc_skb_cb(skb)->post_ct_dnat = 1;

        return err;
#else
        return NF_ACCEPT;
#endif
}

TC_INDIRECT_SCOPE int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
                                 struct tcf_result *res)
{
        struct net *net = dev_net(skb->dev);
        enum ip_conntrack_info ctinfo;
        struct tcf_ct *c = to_ct(a);
        struct nf_conn *tmpl = NULL;
        struct nf_hook_state state;
        bool cached, commit, clear;
        int nh_ofs, err, retval;
        struct tcf_ct_params *p;
        bool add_helper = false;
        bool skip_add = false;
        bool defrag = false;
        struct nf_conn *ct;
        u8 family;

        p = rcu_dereference_bh(c->params);

        retval = READ_ONCE(c->tcf_action);
        commit = p->ct_action & TCA_CT_ACT_COMMIT;
        clear = p->ct_action & TCA_CT_ACT_CLEAR;
        tmpl = p->tmpl;

        tcf_lastuse_update(&c->tcf_tm);
        tcf_action_update_bstats(&c->common, skb);

        if (clear) {
                tc_skb_cb(skb)->post_ct = false;
                ct = nf_ct_get(skb, &ctinfo);
                if (ct) {
                        nf_ct_put(ct);
                        nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
                }

                goto out_clear;
        }

        family = tcf_ct_skb_nf_family(skb);
        if (family == NFPROTO_UNSPEC)
                goto drop;

        /* The conntrack module expects to be working at L3.
         * We also try to pull the IPv4/6 header to linear area
         */
        nh_ofs = skb_network_offset(skb);
        skb_pull_rcsum(skb, nh_ofs);
        err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag);
        if (err)
                goto out_frag;

        err = nf_ct_skb_network_trim(skb, family);
        if (err)
                goto drop;

        /* If we are recirculating packets to match on ct fields and
         * committing with a separate ct action, then we don't need to
         * actually run the packet through conntrack twice unless it's for a
         * different zone.
         */
        cached = tcf_ct_skb_nfct_cached(net, skb, p);
        if (!cached) {
                if (tcf_ct_flow_table_lookup(p, skb, family)) {
                        skip_add = true;
                        goto do_nat;
                }

                /* Associate skb with specified zone. */
                if (tmpl) {
                        nf_conntrack_put(skb_nfct(skb));
                        nf_conntrack_get(&tmpl->ct_general);
                        nf_ct_set(skb, tmpl, IP_CT_NEW);
                }

                state.hook = NF_INET_PRE_ROUTING;
                state.net = net;
                state.pf = family;
                err = nf_conntrack_in(skb, &state);
                if (err != NF_ACCEPT)
                        goto nf_error;
        }

do_nat:
        ct = nf_ct_get(skb, &ctinfo);
        if (!ct)
                goto out_push;
        nf_ct_deliver_cached_events(ct);
        nf_conn_act_ct_ext_fill(skb, ct, ctinfo);

        err = tcf_ct_act_nat(skb, ct, ctinfo, p->ct_action, &p->range, commit);
        if (err != NF_ACCEPT)
                goto nf_error;

        if (!nf_ct_is_confirmed(ct) && commit && p->helper && !nfct_help(ct)) {
                err = __nf_ct_try_assign_helper(ct, p->tmpl, GFP_ATOMIC);
                if (err)
                        goto drop;
                add_helper = true;
                if (p->ct_action & TCA_CT_ACT_NAT && !nfct_seqadj(ct)) {
                        if (!nfct_seqadj_ext_add(ct))
                                goto drop;
                }
        }

        if (nf_ct_is_confirmed(ct) ? ((!cached && !skip_add) || add_helper) : commit) {
                err = nf_ct_helper(skb, ct, ctinfo, family);
                if (err != NF_ACCEPT)
                        goto nf_error;
        }

        if (commit) {
                tcf_ct_act_set_mark(ct, p->mark, p->mark_mask);
                tcf_ct_act_set_labels(ct, p->labels, p->labels_mask);

                if (!nf_ct_is_confirmed(ct))
                        nf_conn_act_ct_ext_add(skb, ct, ctinfo);

                /* This will take care of sending queued events
                 * even if the connection is already confirmed.
                 */
                err = nf_conntrack_confirm(skb);
                if (err != NF_ACCEPT)
                        goto nf_error;

                /* The ct may be dropped if a clash has been resolved,
                 * so it's necessary to retrieve it from skb again to
                 * prevent UAF.
                 */
                ct = nf_ct_get(skb, &ctinfo);
                if (!ct)
                        skip_add = true;
        }

        if (!skip_add)
                tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo);

out_push:
        skb_push_rcsum(skb, nh_ofs);

        tc_skb_cb(skb)->post_ct = true;
        tc_skb_cb(skb)->zone = p->zone;
out_clear:
        if (defrag)
                qdisc_skb_cb(skb)->pkt_len = skb->len;
        return retval;

out_frag:
        if (err != -EINPROGRESS)
                tcf_action_inc_drop_qstats(&c->common);
        return TC_ACT_CONSUMED;

drop:
        tcf_action_inc_drop_qstats(&c->common);
        return TC_ACT_SHOT;

nf_error:
        /* some verdicts store extra data in upper bits, such
         * as errno or queue number.
         */
        switch (err & NF_VERDICT_MASK) {
        case NF_DROP:
                goto drop;
        case NF_STOLEN:
                tcf_action_inc_drop_qstats(&c->common);
                return TC_ACT_CONSUMED;
        default:
                DEBUG_NET_WARN_ON_ONCE(1);
                goto drop;
        }
}

static const struct nla_policy ct_policy[TCA_CT_MAX + 1] = {
        [TCA_CT_ACTION] = { .type = NLA_U16 },
        [TCA_CT_PARMS] = NLA_POLICY_EXACT_LEN(sizeof(struct tc_ct)),
        [TCA_CT_ZONE] = { .type = NLA_U16 },
        [TCA_CT_MARK] = { .type = NLA_U32 },
        [TCA_CT_MARK_MASK] = { .type = NLA_U32 },
        [TCA_CT_LABELS] = { .type = NLA_BINARY,
                            .len = 128 / BITS_PER_BYTE },
        [TCA_CT_LABELS_MASK] = { .type = NLA_BINARY,
                                 .len = 128 / BITS_PER_BYTE },
        [TCA_CT_NAT_IPV4_MIN] = { .type = NLA_U32 },
        [TCA_CT_NAT_IPV4_MAX] = { .type = NLA_U32 },
        [TCA_CT_NAT_IPV6_MIN] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)),
        [TCA_CT_NAT_IPV6_MAX] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)),
        [TCA_CT_NAT_PORT_MIN] = { .type = NLA_U16 },
        [TCA_CT_NAT_PORT_MAX] = { .type = NLA_U16 },
        [TCA_CT_HELPER_NAME] = { .type = NLA_STRING, .len = NF_CT_HELPER_NAME_LEN },
        [TCA_CT_HELPER_FAMILY] = { .type = NLA_U8 },
        [TCA_CT_HELPER_PROTO] = { .type = NLA_U8 },
};

static int tcf_ct_fill_params_nat(struct tcf_ct_params *p,
                                  struct tc_ct *parm,
                                  struct nlattr **tb,
                                  struct netlink_ext_ack *extack)
{
        struct nf_nat_range2 *range;

        if (!(p->ct_action & TCA_CT_ACT_NAT))
                return 0;

        if (!IS_ENABLED(CONFIG_NF_NAT)) {
                NL_SET_ERR_MSG_MOD(extack, "Netfilter nat isn't enabled in kernel");
                return -EOPNOTSUPP;
        }

        if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
                return 0;

        if ((p->ct_action & TCA_CT_ACT_NAT_SRC) &&
            (p->ct_action & TCA_CT_ACT_NAT_DST)) {
                NL_SET_ERR_MSG_MOD(extack, "dnat and snat can't be enabled at the same time");
                return -EOPNOTSUPP;
        }

        range = &p->range;
        if (tb[TCA_CT_NAT_IPV4_MIN]) {
                struct nlattr *max_attr = tb[TCA_CT_NAT_IPV4_MAX];

                p->ipv4_range = true;
                range->flags |= NF_NAT_RANGE_MAP_IPS;
                range->min_addr.ip =
                        nla_get_in_addr(tb[TCA_CT_NAT_IPV4_MIN]);

                range->max_addr.ip = max_attr ?
                                     nla_get_in_addr(max_attr) :
                                     range->min_addr.ip;
        } else if (tb[TCA_CT_NAT_IPV6_MIN]) {
                struct nlattr *max_attr = tb[TCA_CT_NAT_IPV6_MAX];

                p->ipv4_range = false;
                range->flags |= NF_NAT_RANGE_MAP_IPS;
                range->min_addr.in6 =
                        nla_get_in6_addr(tb[TCA_CT_NAT_IPV6_MIN]);

                range->max_addr.in6 = max_attr ?
                                      nla_get_in6_addr(max_attr) :
                                      range->min_addr.in6;
        }

        if (tb[TCA_CT_NAT_PORT_MIN]) {
                range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
                range->min_proto.all = nla_get_be16(tb[TCA_CT_NAT_PORT_MIN]);

                range->max_proto.all = tb[TCA_CT_NAT_PORT_MAX] ?
                                       nla_get_be16(tb[TCA_CT_NAT_PORT_MAX]) :
                                       range->min_proto.all;
        }

        return 0;
}

static void tcf_ct_set_key_val(struct nlattr **tb,
                               void *val, int val_type,
                               void *mask, int mask_type,
                               int len)
{
        if (!tb[val_type])
                return;
        nla_memcpy(val, tb[val_type], len);

        if (!mask)
                return;

        if (mask_type == TCA_CT_UNSPEC || !tb[mask_type])
                memset(mask, 0xff, len);
        else
                nla_memcpy(mask, tb[mask_type], len);
}

static int tcf_ct_fill_params(struct net *net,
                              struct tcf_ct_params *p,
                              struct tc_ct *parm,
                              struct nlattr **tb,
                              struct netlink_ext_ack *extack)
{
        struct nf_conntrack_zone zone;
        int err, family, proto, len;
        bool put_labels = false;
        struct nf_conn *tmpl;
        char *name;

        p->zone = NF_CT_DEFAULT_ZONE_ID;

        tcf_ct_set_key_val(tb,
                           &p->ct_action, TCA_CT_ACTION,
                           NULL, TCA_CT_UNSPEC,
                           sizeof(p->ct_action));

        if (p->ct_action & TCA_CT_ACT_CLEAR)
                return 0;

        err = tcf_ct_fill_params_nat(p, parm, tb, extack);
        if (err)
                return err;

        if (tb[TCA_CT_MARK]) {
                if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
                        NL_SET_ERR_MSG_MOD(extack, "Conntrack mark isn't enabled.");
                        return -EOPNOTSUPP;
                }
                tcf_ct_set_key_val(tb,
                                   &p->mark, TCA_CT_MARK,
                                   &p->mark_mask, TCA_CT_MARK_MASK,
                                   sizeof(p->mark));
        }

        if (tb[TCA_CT_LABELS]) {
                unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8;

                if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
                        NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled.");
                        return -EOPNOTSUPP;
                }

                if (nf_connlabels_get(net, n_bits - 1)) {
                        NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length");
                        return -EOPNOTSUPP;
                } else {
                        put_labels = true;
                }

                tcf_ct_set_key_val(tb,
                                   p->labels, TCA_CT_LABELS,
                                   p->labels_mask, TCA_CT_LABELS_MASK,
                                   sizeof(p->labels));
        }

        if (tb[TCA_CT_ZONE]) {
                if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
                        NL_SET_ERR_MSG_MOD(extack, "Conntrack zones isn't enabled.");
                        return -EOPNOTSUPP;
                }

                tcf_ct_set_key_val(tb,
                                   &p->zone, TCA_CT_ZONE,
                                   NULL, TCA_CT_UNSPEC,
                                   sizeof(p->zone));
        }

        nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0);
        tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL);
        if (!tmpl) {
                NL_SET_ERR_MSG_MOD(extack, "Failed to allocate conntrack template");
                return -ENOMEM;
        }
        p->tmpl = tmpl;
        if (tb[TCA_CT_HELPER_NAME]) {
                name = nla_data(tb[TCA_CT_HELPER_NAME]);
                len = nla_len(tb[TCA_CT_HELPER_NAME]);
                if (len > 16 || name[len - 1] != '\0') {
                        NL_SET_ERR_MSG_MOD(extack, "Failed to parse helper name.");
                        err = -EINVAL;
                        goto err;
                }
                family = tb[TCA_CT_HELPER_FAMILY] ? nla_get_u8(tb[TCA_CT_HELPER_FAMILY]) : AF_INET;
                proto = tb[TCA_CT_HELPER_PROTO] ? nla_get_u8(tb[TCA_CT_HELPER_PROTO]) : IPPROTO_TCP;
                err = nf_ct_add_helper(tmpl, name, family, proto,
                                       p->ct_action & TCA_CT_ACT_NAT, &p->helper);
                if (err) {
                        NL_SET_ERR_MSG_MOD(extack, "Failed to add helper");
                        goto err;
                }
        }

        p->put_labels = put_labels;

        if (p->ct_action & TCA_CT_ACT_COMMIT)
                __set_bit(IPS_CONFIRMED_BIT, &tmpl->status);
        return 0;
err:
        if (put_labels)
                nf_connlabels_put(net);

        nf_ct_put(p->tmpl);
        p->tmpl = NULL;
        return err;
}

static int tcf_ct_init(struct net *net, struct nlattr *nla,
                       struct nlattr *est, struct tc_action **a,
                       struct tcf_proto *tp, u32 flags,
                       struct netlink_ext_ack *extack)
{
        struct tc_action_net *tn = net_generic(net, act_ct_ops.net_id);
        bool bind = flags & TCA_ACT_FLAGS_BIND;
        struct tcf_ct_params *params = NULL;
        struct nlattr *tb[TCA_CT_MAX + 1];
        struct tcf_chain *goto_ch = NULL;
        struct tc_ct *parm;
        struct tcf_ct *c;
        int err, res = 0;
        u32 index;

        if (!nla) {
                NL_SET_ERR_MSG_MOD(extack, "Ct requires attributes to be passed");
                return -EINVAL;
        }

        err = nla_parse_nested(tb, TCA_CT_MAX, nla, ct_policy, extack);
        if (err < 0)
                return err;

        if (!tb[TCA_CT_PARMS]) {
                NL_SET_ERR_MSG_MOD(extack, "Missing required ct parameters");
                return -EINVAL;
        }
        parm = nla_data(tb[TCA_CT_PARMS]);
        index = parm->index;
        err = tcf_idr_check_alloc(tn, &index, a, bind);
        if (err < 0)
                return err;

        if (!err) {
                err = tcf_idr_create_from_flags(tn, index, est, a,
                                                &act_ct_ops, bind, flags);
                if (err) {
                        tcf_idr_cleanup(tn, index);
                        return err;
                }
                res = ACT_P_CREATED;
        } else {
                if (bind)
                        return ACT_P_BOUND;

                if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
                        tcf_idr_release(*a, bind);
                        return -EEXIST;
                }
        }
        err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
        if (err < 0)
                goto cleanup;

        c = to_ct(*a);

        params = kzalloc(sizeof(*params), GFP_KERNEL);
        if (unlikely(!params)) {
                err = -ENOMEM;
                goto cleanup;
        }

        err = tcf_ct_fill_params(net, params, parm, tb, extack);
        if (err)
                goto cleanup;

        err = tcf_ct_flow_table_get(net, params);
        if (err)
                goto cleanup;

        spin_lock_bh(&c->tcf_lock);
        goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
        params = rcu_replace_pointer(c->params, params,
                                     lockdep_is_held(&c->tcf_lock));
        spin_unlock_bh(&c->tcf_lock);

        if (goto_ch)
                tcf_chain_put_by_act(goto_ch);
        if (params)
                call_rcu(&params->rcu, tcf_ct_params_free_rcu);

        return res;

cleanup:
        if (goto_ch)
                tcf_chain_put_by_act(goto_ch);
        if (params)
                tcf_ct_params_free(params);
        tcf_idr_release(*a, bind);
        return err;
}

static void tcf_ct_cleanup(struct tc_action *a)
{
        struct tcf_ct_params *params;
        struct tcf_ct *c = to_ct(a);

        params = rcu_dereference_protected(c->params, 1);
        if (params)
                call_rcu(&params->rcu, tcf_ct_params_free_rcu);
}

static int tcf_ct_dump_key_val(struct sk_buff *skb,
                               void *val, int val_type,
                               void *mask, int mask_type,
                               int len)
{
        int err;

        if (mask && !memchr_inv(mask, 0, len))
                return 0;

        err = nla_put(skb, val_type, len, val);
        if (err)
                return err;

        if (mask_type != TCA_CT_UNSPEC) {
                err = nla_put(skb, mask_type, len, mask);
                if (err)
                        return err;
        }

        return 0;
}

static int tcf_ct_dump_nat(struct sk_buff *skb, struct tcf_ct_params *p)
{
        struct nf_nat_range2 *range = &p->range;

        if (!(p->ct_action & TCA_CT_ACT_NAT))
                return 0;

        if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
                return 0;

        if (range->flags & NF_NAT_RANGE_MAP_IPS) {
                if (p->ipv4_range) {
                        if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MIN,
                                            range->min_addr.ip))
                                return -1;
                        if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MAX,
                                            range->max_addr.ip))
                                return -1;
                } else {
                        if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MIN,
                                             &range->min_addr.in6))
                                return -1;
                        if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MAX,
                                             &range->max_addr.in6))
                                return -1;
                }
        }

        if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
                if (nla_put_be16(skb, TCA_CT_NAT_PORT_MIN,
                                 range->min_proto.all))
                        return -1;
                if (nla_put_be16(skb, TCA_CT_NAT_PORT_MAX,
                                 range->max_proto.all))
                        return -1;
        }

        return 0;
}

static int tcf_ct_dump_helper(struct sk_buff *skb, struct nf_conntrack_helper *helper)
{
        if (!helper)
                return 0;

        if (nla_put_string(skb, TCA_CT_HELPER_NAME, helper->name) ||
            nla_put_u8(skb, TCA_CT_HELPER_FAMILY, helper->tuple.src.l3num) ||
            nla_put_u8(skb, TCA_CT_HELPER_PROTO, helper->tuple.dst.protonum))
                return -1;

        return 0;
}

static inline int tcf_ct_dump(struct sk_buff *skb, struct tc_action *a,
                              int bind, int ref)
{
        unsigned char *b = skb_tail_pointer(skb);
        struct tcf_ct *c = to_ct(a);
        struct tcf_ct_params *p;

        struct tc_ct opt = {
                .index   = c->tcf_index,
                .refcnt  = refcount_read(&c->tcf_refcnt) - ref,
                .bindcnt = atomic_read(&c->tcf_bindcnt) - bind,
        };
        struct tcf_t t;

        spin_lock_bh(&c->tcf_lock);
        p = rcu_dereference_protected(c->params,
                                      lockdep_is_held(&c->tcf_lock));
        opt.action = c->tcf_action;

        if (tcf_ct_dump_key_val(skb,
                                &p->ct_action, TCA_CT_ACTION,
                                NULL, TCA_CT_UNSPEC,
                                sizeof(p->ct_action)))
                goto nla_put_failure;

        if (p->ct_action & TCA_CT_ACT_CLEAR)
                goto skip_dump;

        if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
            tcf_ct_dump_key_val(skb,
                                &p->mark, TCA_CT_MARK,
                                &p->mark_mask, TCA_CT_MARK_MASK,
                                sizeof(p->mark)))
                goto nla_put_failure;

        if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
            tcf_ct_dump_key_val(skb,
                                p->labels, TCA_CT_LABELS,
                                p->labels_mask, TCA_CT_LABELS_MASK,
                                sizeof(p->labels)))
                goto nla_put_failure;

        if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
            tcf_ct_dump_key_val(skb,
                                &p->zone, TCA_CT_ZONE,
                                NULL, TCA_CT_UNSPEC,
                                sizeof(p->zone)))
                goto nla_put_failure;

        if (tcf_ct_dump_nat(skb, p))
                goto nla_put_failure;

        if (tcf_ct_dump_helper(skb, p->helper))
                goto nla_put_failure;

skip_dump:
        if (nla_put(skb, TCA_CT_PARMS, sizeof(opt), &opt))
                goto nla_put_failure;

        tcf_tm_dump(&t, &c->tcf_tm);
        if (nla_put_64bit(skb, TCA_CT_TM, sizeof(t), &t, TCA_CT_PAD))
                goto nla_put_failure;
        spin_unlock_bh(&c->tcf_lock);

        return skb->len;
nla_put_failure:
        spin_unlock_bh(&c->tcf_lock);
        nlmsg_trim(skb, b);
        return -1;
}

static void tcf_stats_update(struct tc_action *a, u64 bytes, u64 packets,
                             u64 drops, u64 lastuse, bool hw)
{
        struct tcf_ct *c = to_ct(a);

        tcf_action_update_stats(a, bytes, packets, drops, hw);
        c->tcf_tm.lastuse = max_t(u64, c->tcf_tm.lastuse, lastuse);
}

static int tcf_ct_offload_act_setup(struct tc_action *act, void *entry_data,
                                    u32 *index_inc, bool bind,
                                    struct netlink_ext_ack *extack)
{
        if (bind) {
                struct flow_action_entry *entry = entry_data;

                if (tcf_ct_helper(act))
                        return -EOPNOTSUPP;

                entry->id = FLOW_ACTION_CT;
                entry->ct.action = tcf_ct_action(act);
                entry->ct.zone = tcf_ct_zone(act);
                entry->ct.flow_table = tcf_ct_ft(act);
                *index_inc = 1;
        } else {
                struct flow_offload_action *fl_action = entry_data;

                fl_action->id = FLOW_ACTION_CT;
        }

        return 0;
}

static struct tc_action_ops act_ct_ops = {
        .kind                =        "ct",
        .id                =        TCA_ID_CT,
        .owner                =        THIS_MODULE,
        .act                =        tcf_ct_act,
        .dump                =        tcf_ct_dump,
        .init                =        tcf_ct_init,
        .cleanup        =        tcf_ct_cleanup,
        .stats_update        =        tcf_stats_update,
        .offload_act_setup =        tcf_ct_offload_act_setup,
        .size                =        sizeof(struct tcf_ct),
};
MODULE_ALIAS_NET_ACT("ct");

static __net_init int ct_init_net(struct net *net)
{
        struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);

        return tc_action_net_init(net, &tn->tn, &act_ct_ops);
}

static void __net_exit ct_exit_net(struct list_head *net_list)
{
        tc_action_net_exit(net_list, act_ct_ops.net_id);
}

static struct pernet_operations ct_net_ops = {
        .init = ct_init_net,
        .exit_batch = ct_exit_net,
        .id   = &act_ct_ops.net_id,
        .size = sizeof(struct tc_ct_action_net),
};

static int __init ct_init_module(void)
{
        int err;

        act_ct_wq = alloc_ordered_workqueue("act_ct_workqueue", 0);
        if (!act_ct_wq)
                return -ENOMEM;

        err = tcf_ct_flow_tables_init();
        if (err)
                goto err_tbl_init;

        err = tcf_register_action(&act_ct_ops, &ct_net_ops);
        if (err)
                goto err_register;

        static_branch_inc(&tcf_frag_xmit_count);

        return 0;

err_register:
        tcf_ct_flow_tables_uninit();
err_tbl_init:
        destroy_workqueue(act_ct_wq);
        return err;
}

static void __exit ct_cleanup_module(void)
{
        static_branch_dec(&tcf_frag_xmit_count);
        tcf_unregister_action(&act_ct_ops, &ct_net_ops);
        tcf_ct_flow_tables_uninit();
        destroy_workqueue(act_ct_wq);
}

module_init(ct_init_module);
module_exit(ct_cleanup_module);
MODULE_AUTHOR("Paul Blakey <paulb@mellanox.com>");
MODULE_AUTHOR("Yossi Kuperman <yossiku@mellanox.com>");
MODULE_AUTHOR("Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>");
MODULE_DESCRIPTION("Connection tracking action");
MODULE_LICENSE("GPL v2");




















































































































































































    3 

    3 


















    3 






    3 













































    3 




    3 







    3 





















































































    6 























    6 
    6 

    3 

    3 










































    5 
    3 
    2 











    5 











    5 









    5 













    7 





















    1 
    1 











    5 






















    6 





    7 
























































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/fs/sysv/inode.c
 *
 *  minix/inode.c
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  xenix/inode.c
 *  Copyright (C) 1992  Doug Evans
 *
 *  coh/inode.c
 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
 *
 *  sysv/inode.c
 *  Copyright (C) 1993  Paul B. Monday
 *
 *  sysv/inode.c
 *  Copyright (C) 1993  Bruno Haible
 *  Copyright (C) 1997, 1998  Krzysztof G. Baranowski
 *
 *  This file contains code for read/parsing the superblock.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/buffer_head.h>
#include "sysv.h"

/*
 * The following functions try to recognize specific filesystems.
 *
 * We recognize:
 * - Xenix FS by its magic number.
 * - SystemV FS by its magic number.
 * - Coherent FS by its funny fname/fpack field.
 * - SCO AFS by s_nfree == 0xffff
 * - V7 FS has no distinguishing features.
 *
 * We discriminate among SystemV4 and SystemV2 FS by the assumption that
 * the time stamp is not < 01-01-1980.
 */

enum {
        JAN_1_1980 = (10*365 + 2) * 24 * 60 * 60
};

static void detected_xenix(struct sysv_sb_info *sbi, unsigned *max_links)
{
        struct buffer_head *bh1 = sbi->s_bh1;
        struct buffer_head *bh2 = sbi->s_bh2;
        struct xenix_super_block * sbd1;
        struct xenix_super_block * sbd2;

        if (bh1 != bh2)
                sbd1 = sbd2 = (struct xenix_super_block *) bh1->b_data;
        else {
                /* block size = 512, so bh1 != bh2 */
                sbd1 = (struct xenix_super_block *) bh1->b_data;
                sbd2 = (struct xenix_super_block *) (bh2->b_data - 512);
        }

        *max_links = XENIX_LINK_MAX;
        sbi->s_fic_size = XENIX_NICINOD;
        sbi->s_flc_size = XENIX_NICFREE;
        sbi->s_sbd1 = (char *)sbd1;
        sbi->s_sbd2 = (char *)sbd2;
        sbi->s_sb_fic_count = &sbd1->s_ninode;
        sbi->s_sb_fic_inodes = &sbd1->s_inode[0];
        sbi->s_sb_total_free_inodes = &sbd2->s_tinode;
        sbi->s_bcache_count = &sbd1->s_nfree;
        sbi->s_bcache = &sbd1->s_free[0];
        sbi->s_free_blocks = &sbd2->s_tfree;
        sbi->s_sb_time = &sbd2->s_time;
        sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd1->s_isize);
        sbi->s_nzones = fs32_to_cpu(sbi, sbd1->s_fsize);
}

static void detected_sysv4(struct sysv_sb_info *sbi, unsigned *max_links)
{
        struct sysv4_super_block * sbd;
        struct buffer_head *bh1 = sbi->s_bh1;
        struct buffer_head *bh2 = sbi->s_bh2;

        if (bh1 == bh2)
                sbd = (struct sysv4_super_block *) (bh1->b_data + BLOCK_SIZE/2);
        else
                sbd = (struct sysv4_super_block *) bh2->b_data;

        *max_links = SYSV_LINK_MAX;
        sbi->s_fic_size = SYSV_NICINOD;
        sbi->s_flc_size = SYSV_NICFREE;
        sbi->s_sbd1 = (char *)sbd;
        sbi->s_sbd2 = (char *)sbd;
        sbi->s_sb_fic_count = &sbd->s_ninode;
        sbi->s_sb_fic_inodes = &sbd->s_inode[0];
        sbi->s_sb_total_free_inodes = &sbd->s_tinode;
        sbi->s_bcache_count = &sbd->s_nfree;
        sbi->s_bcache = &sbd->s_free[0];
        sbi->s_free_blocks = &sbd->s_tfree;
        sbi->s_sb_time = &sbd->s_time;
        sbi->s_sb_state = &sbd->s_state;
        sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
        sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
}

static void detected_sysv2(struct sysv_sb_info *sbi, unsigned *max_links)
{
        struct sysv2_super_block *sbd;
        struct buffer_head *bh1 = sbi->s_bh1;
        struct buffer_head *bh2 = sbi->s_bh2;

        if (bh1 == bh2)
                sbd = (struct sysv2_super_block *) (bh1->b_data + BLOCK_SIZE/2);
        else
                sbd = (struct sysv2_super_block *) bh2->b_data;

        *max_links = SYSV_LINK_MAX;
        sbi->s_fic_size = SYSV_NICINOD;
        sbi->s_flc_size = SYSV_NICFREE;
        sbi->s_sbd1 = (char *)sbd;
        sbi->s_sbd2 = (char *)sbd;
        sbi->s_sb_fic_count = &sbd->s_ninode;
        sbi->s_sb_fic_inodes = &sbd->s_inode[0];
        sbi->s_sb_total_free_inodes = &sbd->s_tinode;
        sbi->s_bcache_count = &sbd->s_nfree;
        sbi->s_bcache = &sbd->s_free[0];
        sbi->s_free_blocks = &sbd->s_tfree;
        sbi->s_sb_time = &sbd->s_time;
        sbi->s_sb_state = &sbd->s_state;
        sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
        sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
}

static void detected_coherent(struct sysv_sb_info *sbi, unsigned *max_links)
{
        struct coh_super_block * sbd;
        struct buffer_head *bh1 = sbi->s_bh1;

        sbd = (struct coh_super_block *) bh1->b_data;

        *max_links = COH_LINK_MAX;
        sbi->s_fic_size = COH_NICINOD;
        sbi->s_flc_size = COH_NICFREE;
        sbi->s_sbd1 = (char *)sbd;
        sbi->s_sbd2 = (char *)sbd;
        sbi->s_sb_fic_count = &sbd->s_ninode;
        sbi->s_sb_fic_inodes = &sbd->s_inode[0];
        sbi->s_sb_total_free_inodes = &sbd->s_tinode;
        sbi->s_bcache_count = &sbd->s_nfree;
        sbi->s_bcache = &sbd->s_free[0];
        sbi->s_free_blocks = &sbd->s_tfree;
        sbi->s_sb_time = &sbd->s_time;
        sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
        sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
}

static void detected_v7(struct sysv_sb_info *sbi, unsigned *max_links)
{
        struct buffer_head *bh2 = sbi->s_bh2;
        struct v7_super_block *sbd = (struct v7_super_block *)bh2->b_data;

        *max_links = V7_LINK_MAX;
        sbi->s_fic_size = V7_NICINOD;
        sbi->s_flc_size = V7_NICFREE;
        sbi->s_sbd1 = (char *)sbd;
        sbi->s_sbd2 = (char *)sbd;
        sbi->s_sb_fic_count = &sbd->s_ninode;
        sbi->s_sb_fic_inodes = &sbd->s_inode[0];
        sbi->s_sb_total_free_inodes = &sbd->s_tinode;
        sbi->s_bcache_count = &sbd->s_nfree;
        sbi->s_bcache = &sbd->s_free[0];
        sbi->s_free_blocks = &sbd->s_tfree;
        sbi->s_sb_time = &sbd->s_time;
        sbi->s_firstdatazone = fs16_to_cpu(sbi, sbd->s_isize);
        sbi->s_nzones = fs32_to_cpu(sbi, sbd->s_fsize);
}

static int detect_xenix(struct sysv_sb_info *sbi, struct buffer_head *bh)
{
        struct xenix_super_block *sbd = (struct xenix_super_block *)bh->b_data;
        if (*(__le32 *)&sbd->s_magic == cpu_to_le32(0x2b5544))
                sbi->s_bytesex = BYTESEX_LE;
        else if (*(__be32 *)&sbd->s_magic == cpu_to_be32(0x2b5544))
                sbi->s_bytesex = BYTESEX_BE;
        else
                return 0;
        switch (fs32_to_cpu(sbi, sbd->s_type)) {
        case 1:
                sbi->s_type = FSTYPE_XENIX;
                return 1;
        case 2:
                sbi->s_type = FSTYPE_XENIX;
                return 2;
        default:
                return 0;
        }
}

static int detect_sysv(struct sysv_sb_info *sbi, struct buffer_head *bh)
{
        struct super_block *sb = sbi->s_sb;
        /* All relevant fields are at the same offsets in R2 and R4 */
        struct sysv4_super_block * sbd;
        u32 type;

        sbd = (struct sysv4_super_block *) (bh->b_data + BLOCK_SIZE/2);
        if (*(__le32 *)&sbd->s_magic == cpu_to_le32(0xfd187e20))
                sbi->s_bytesex = BYTESEX_LE;
        else if (*(__be32 *)&sbd->s_magic == cpu_to_be32(0xfd187e20))
                sbi->s_bytesex = BYTESEX_BE;
        else
                return 0;

        type = fs32_to_cpu(sbi, sbd->s_type);
 
         if (fs16_to_cpu(sbi, sbd->s_nfree) == 0xffff) {
                 sbi->s_type = FSTYPE_AFS;
                sbi->s_forced_ro = 1;
                 if (!sb_rdonly(sb)) {
                         printk("SysV FS: SCO EAFS on %s detected, " 
                                 "forcing read-only mode.\n", 
                                 sb->s_id);
                 }
                 return type;
         }
 
        if (fs32_to_cpu(sbi, sbd->s_time) < JAN_1_1980) {
                /* this is likely to happen on SystemV2 FS */
                if (type > 3 || type < 1)
                        return 0;
                sbi->s_type = FSTYPE_SYSV2;
                return type;
        }
        if ((type > 3 || type < 1) && (type > 0x30 || type < 0x10))
                return 0;

        /* On Interactive Unix (ISC) Version 4.0/3.x s_type field = 0x10,
           0x20 or 0x30 indicates that symbolic links and the 14-character
           filename limit is gone. Due to lack of information about this
           feature read-only mode seems to be a reasonable approach... -KGB */

        if (type >= 0x10) {
                printk("SysV FS: can't handle long file names on %s, "
                       "forcing read-only mode.\n", sb->s_id);
                sbi->s_forced_ro = 1;
        }

        sbi->s_type = FSTYPE_SYSV4;
        return type >= 0x10 ? type >> 4 : type;
}

static int detect_coherent(struct sysv_sb_info *sbi, struct buffer_head *bh)
{
        struct coh_super_block * sbd;

        sbd = (struct coh_super_block *) (bh->b_data + BLOCK_SIZE/2);
        if ((memcmp(sbd->s_fname,"noname",6) && memcmp(sbd->s_fname,"xxxxx ",6))
            || (memcmp(sbd->s_fpack,"nopack",6) && memcmp(sbd->s_fpack,"xxxxx\n",6)))
                return 0;
        sbi->s_bytesex = BYTESEX_PDP;
        sbi->s_type = FSTYPE_COH;
        return 1;
}

static int detect_sysv_odd(struct sysv_sb_info *sbi, struct buffer_head *bh)
{
        int size = detect_sysv(sbi, bh);

        return size>2 ? 0 : size;
}

static struct {
        int block;
        int (*test)(struct sysv_sb_info *, struct buffer_head *);
} flavours[] = {
        {1, detect_xenix},
        {0, detect_sysv},
        {0, detect_coherent},
        {9, detect_sysv_odd},
        {15,detect_sysv_odd},
        {18,detect_sysv},
};

static char *flavour_names[] = {
        [FSTYPE_XENIX]        = "Xenix",
        [FSTYPE_SYSV4]        = "SystemV",
        [FSTYPE_SYSV2]        = "SystemV Release 2",
        [FSTYPE_COH]        = "Coherent",
        [FSTYPE_V7]        = "V7",
        [FSTYPE_AFS]        = "AFS",
};

static void (*flavour_setup[])(struct sysv_sb_info *, unsigned *) = {
        [FSTYPE_XENIX]        = detected_xenix,
        [FSTYPE_SYSV4]        = detected_sysv4,
        [FSTYPE_SYSV2]        = detected_sysv2,
        [FSTYPE_COH]        = detected_coherent,
        [FSTYPE_V7]        = detected_v7,
        [FSTYPE_AFS]        = detected_sysv4,
};

static int complete_read_super(struct super_block *sb, int silent, int size)
{
        struct sysv_sb_info *sbi = SYSV_SB(sb);
        struct inode *root_inode;
        char *found = flavour_names[sbi->s_type];
        u_char n_bits = size+8;
        int bsize = 1 << n_bits;
        int bsize_4 = bsize >> 2;

        sbi->s_firstinodezone = 2;

        flavour_setup[sbi->s_type](sbi, &sb->s_max_links);
        if (sbi->s_firstdatazone < sbi->s_firstinodezone)
                return 0;

        sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone;
        sbi->s_inodes_per_block = bsize >> 6;
        sbi->s_inodes_per_block_1 = (bsize >> 6)-1;
        sbi->s_inodes_per_block_bits = n_bits-6;
        sbi->s_ind_per_block = bsize_4;
        sbi->s_ind_per_block_2 = bsize_4*bsize_4;
        sbi->s_toobig_block = 10 + bsize_4 * (1 + bsize_4 * (1 + bsize_4));
        sbi->s_ind_per_block_bits = n_bits-2;

        sbi->s_ninodes = (sbi->s_firstdatazone - sbi->s_firstinodezone)
                << sbi->s_inodes_per_block_bits;

        if (!silent)
                printk("VFS: Found a %s FS (block size = %ld) on device %s\n",
                       found, sb->s_blocksize, sb->s_id);

        sb->s_magic = SYSV_MAGIC_BASE + sbi->s_type;
        /* set up enough so that it can read an inode */
        sb->s_op = &sysv_sops;
        if (sbi->s_forced_ro)
                sb->s_flags |= SB_RDONLY;
        root_inode = sysv_iget(sb, SYSV_ROOT_INO);
        if (IS_ERR(root_inode)) {
                printk("SysV FS: get root inode failed\n");
                return 0;
        }
        sb->s_root = d_make_root(root_inode);
        if (!sb->s_root) {
                printk("SysV FS: get root dentry failed\n");
                return 0;
        }
        return 1;
}

static int sysv_fill_super(struct super_block *sb, void *data, int silent)
{
        struct buffer_head *bh1, *bh = NULL;
        struct sysv_sb_info *sbi;
        unsigned long blocknr;
        int size = 0, i;
        
        BUILD_BUG_ON(1024 != sizeof (struct xenix_super_block));
        BUILD_BUG_ON(512 != sizeof (struct sysv4_super_block));
        BUILD_BUG_ON(512 != sizeof (struct sysv2_super_block));
        BUILD_BUG_ON(500 != sizeof (struct coh_super_block));
        BUILD_BUG_ON(64 != sizeof (struct sysv_inode));

        sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
        if (!sbi)
                return -ENOMEM;

        sbi->s_sb = sb;
        sbi->s_block_base = 0;
        mutex_init(&sbi->s_lock);
        sb->s_fs_info = sbi;
        sb->s_time_min = 0;
        sb->s_time_max = U32_MAX;
        sb_set_blocksize(sb, BLOCK_SIZE);

        for (i = 0; i < ARRAY_SIZE(flavours) && !size; i++) {
                brelse(bh);
                bh = sb_bread(sb, flavours[i].block);
                if (!bh)
                        continue;
                size = flavours[i].test(SYSV_SB(sb), bh);
        }

        if (!size)
                goto Eunknown;

        switch (size) {
                case 1:
                        blocknr = bh->b_blocknr << 1;
                        brelse(bh);
                        sb_set_blocksize(sb, 512);
                        bh1 = sb_bread(sb, blocknr);
                        bh = sb_bread(sb, blocknr + 1);
                        break;
                case 2:
                        bh1 = bh;
                        break;
                case 3:
                        blocknr = bh->b_blocknr >> 1;
                        brelse(bh);
                        sb_set_blocksize(sb, 2048);
                        bh1 = bh = sb_bread(sb, blocknr);
                        break;
                default:
                        goto Ebadsize;
        }

        if (bh && bh1) {
                sbi->s_bh1 = bh1;
                sbi->s_bh2 = bh;
                if (complete_read_super(sb, silent, size))
                        return 0;
        }

        brelse(bh1);
        brelse(bh);
        sb_set_blocksize(sb, BLOCK_SIZE);
        printk("oldfs: cannot read superblock\n");
failed:
        kfree(sbi);
        return -EINVAL;

Eunknown:
        brelse(bh);
        if (!silent)
                printk("VFS: unable to find oldfs superblock on device %s\n",
                        sb->s_id);
        goto failed;
Ebadsize:
        brelse(bh);
        if (!silent)
                printk("VFS: oldfs: unsupported block size (%dKb)\n",
                        1<<(size-2));
        goto failed;
}

static int v7_sanity_check(struct super_block *sb, struct buffer_head *bh)
{
        struct v7_super_block *v7sb;
        struct sysv_inode *v7i;
        struct buffer_head *bh2;
        struct sysv_sb_info *sbi;

        sbi = sb->s_fs_info;

        /* plausibility check on superblock */
        v7sb = (struct v7_super_block *) bh->b_data;
        if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE ||
            fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD ||
            fs32_to_cpu(sbi, v7sb->s_fsize) > V7_MAXSIZE)
                return 0;

        /* plausibility check on root inode: it is a directory,
           with a nonzero size that is a multiple of 16 */
        bh2 = sb_bread(sb, 2);
        if (bh2 == NULL)
                return 0;

        v7i = (struct sysv_inode *)(bh2->b_data + 64);
        if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR ||
            (fs32_to_cpu(sbi, v7i->i_size) == 0) ||
            (fs32_to_cpu(sbi, v7i->i_size) & 017) ||
            (fs32_to_cpu(sbi, v7i->i_size) > V7_NFILES *
             sizeof(struct sysv_dir_entry))) {
                brelse(bh2);
                return 0;
        }

        brelse(bh2);
        return 1;
}

static int v7_fill_super(struct super_block *sb, void *data, int silent)
{
        struct sysv_sb_info *sbi;
        struct buffer_head *bh;

        BUILD_BUG_ON(sizeof(struct v7_super_block) != 440);
        BUILD_BUG_ON(sizeof(struct sysv_inode) != 64);

        sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
        if (!sbi)
                return -ENOMEM;

        sbi->s_sb = sb;
        sbi->s_block_base = 0;
        sbi->s_type = FSTYPE_V7;
        mutex_init(&sbi->s_lock);
        sb->s_fs_info = sbi;
        sb->s_time_min = 0;
        sb->s_time_max = U32_MAX;
        
        sb_set_blocksize(sb, 512);

        if ((bh = sb_bread(sb, 1)) == NULL) {
                if (!silent)
                        printk("VFS: unable to read V7 FS superblock on "
                               "device %s.\n", sb->s_id);
                goto failed;
        }

        /* Try PDP-11 UNIX */
        sbi->s_bytesex = BYTESEX_PDP;
        if (v7_sanity_check(sb, bh))
                goto detected;

        /* Try PC/IX, v7/x86 */
        sbi->s_bytesex = BYTESEX_LE;
        if (v7_sanity_check(sb, bh))
                goto detected;

        goto failed;

detected:
        sbi->s_bh1 = bh;
        sbi->s_bh2 = bh;
        if (complete_read_super(sb, silent, 1))
                return 0;

failed:
        printk(KERN_ERR "VFS: could not find a valid V7 on %s.\n",
                sb->s_id);
        brelse(bh);
        kfree(sbi);
        return -EINVAL;
}

/* Every kernel module contains stuff like this. */

static struct dentry *sysv_mount(struct file_system_type *fs_type,
        int flags, const char *dev_name, void *data)
{
        return mount_bdev(fs_type, flags, dev_name, data, sysv_fill_super);
}

static struct dentry *v7_mount(struct file_system_type *fs_type,
        int flags, const char *dev_name, void *data)
{
        return mount_bdev(fs_type, flags, dev_name, data, v7_fill_super);
}

static struct file_system_type sysv_fs_type = {
        .owner                = THIS_MODULE,
        .name                = "sysv",
        .mount                = sysv_mount,
        .kill_sb        = kill_block_super,
        .fs_flags        = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("sysv");

static struct file_system_type v7_fs_type = {
        .owner                = THIS_MODULE,
        .name                = "v7",
        .mount                = v7_mount,
        .kill_sb        = kill_block_super,
        .fs_flags        = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("v7");
MODULE_ALIAS("v7");

static int __init init_sysv_fs(void)
{
        int error;

        error = sysv_init_icache();
        if (error)
                goto out;
        error = register_filesystem(&sysv_fs_type);
        if (error)
                goto destroy_icache;
        error = register_filesystem(&v7_fs_type);
        if (error)
                goto unregister;
        return 0;

unregister:
        unregister_filesystem(&sysv_fs_type);
destroy_icache:
        sysv_destroy_icache();
out:
        return error;
}

static void __exit exit_sysv_fs(void)
{
        unregister_filesystem(&sysv_fs_type);
        unregister_filesystem(&v7_fs_type);
        sysv_destroy_icache();
}

module_init(init_sysv_fs)
module_exit(exit_sysv_fs)
MODULE_DESCRIPTION("SystemV Filesystem");
MODULE_LICENSE("GPL");





































































  983 







   13 


    5 
  962 
  949 
   17 






   10 

    4 
   11 




    5 





    9 


  958 

  959 


  934 


  955 


  625 
  621 




  618 
















  100 



  100 

    6 
   69 





   26 

   54 





    7 

   35 
   37 








   37 





   11 



    8 
    2 










   73 






   19 























   66 







    1 













    1 


    5 





   59 



   59 



   12 





   41 




   41 



   39 


    2 





    4 
    4 





















































































































































































































































































































































































































































































































































































































































































































   35 





   16 


   18 








   13 









   10 


   11 




















    1 









    4 





















































   61 






   61 









   61 



   61 


   61 


   14 





   14 

















   61 

































































   61 






















  163 












  164 
  163 
  164 
  163 
  164 
  164 
  164 
  164 
  163 
  164 
  163 























  173 









  188 


    2 












   87 




    3 






   68 
   16 


   65 
   20 

   14 
   71 

   40 
   45 



   78 
    5 



   49 
   37 

   63 
   22 

   77 










    6 

    1 

   75 
    8 






   17 
   10 



   24 
    3 



   13 
   14 

   20 
    7 




   23 
    4 


   21 
    6 

   21 
    6 

   22 









    4 

    1 





   99 









   27 

   73 




    4 




   72 
   20 
    4 





   14 

    8 
    4 




    1 
    3 




   12 
    2 



   44 
    2 











   17 







    4 













    3 




    1 


    2 


    1 










    2 

    8 



    5 

    3 





    3 

    3 
    3 



    3 


    2 

    1 










   26 
   25 

    8 






   20 





















    7 








    3 





   63 







   63 
   63 















   60 












   60 







   60 







   60 







   60 





   60 















   63 









    2 


   62 



   60 


   63 



















































   62 


   63 




















































































































































   61 





   61 












   61 







   61 








































   61 








   61 










   61 


















































































   63 







   62 
   63 
   63 
   63 
   63 
   63 
   63 
   63 
   63 
   62 
   63 
   63 
   63 
   63 
   63 
   63 
   63 
    1 
   62 
   63 
   63 
   63 
    1 

   62 


   63 


   62 


    1 
   62 
   62 

   63 

   63 
   63 
    1 

   62 


   63 
   63 




   63 

   63 



   63 

   63 

























































































































































































































































































































































   63 




















   63 































   63 


   63 


   63 


   62 


   63 


   63 



   63 












   63 









   63 





   62 

















   63 







   63 








   63 







   60 

















   61 









   61 



























   61 














   62 

   63 











   63 


















   63 



   63 






   63 




   63 







   63 

















   63 



   63 















   63 





   63 


















   63 






























































































































































































































































































   25 











   12 





   11 
    2 
   10 
    3 
    6 





    3 



    1 













   10 





    2 








    2 



    6 


    8 
    8 

    2 

    8 




































    7 











    3 





    1 















    1 


















































   32 








  215 





    3 






  212 

    1 









    5 

















   20 

    7 





   15 

    5 






    3 




  140 


   35 

    2 
    1 





   27 


   10 





   29 

    8 






    5 

    4 

  183 



  192 













   24 






   11 



  157 




















   31 






   29 

   15 





   14 







   27 


    2 


    1 


    1 













































    1 





    3 








    1 

    1 






   52 






















    4 



    4 
   45 







    2 
    6 




















    4 


   45 













    1 










































   15 
   30 




   31 









   15 





















    1 




    1 




   16 































   15 
    1 





   15 
    1 





   15 







    1 











   15 
    1 




   15 





    1 




   15 
    1 







   14 





    1 




   14 





    1 










    1 




   14 



















    7 
    1 
    7 
    1 
    7 
    1 
    7 
    1 
    7 
    1 
    7 
    1 
    7 
    1 
    7 
    1 


    5 
    3 



















   33 













   33 
   33 









   33 


   33 











  138 



  138 

  138 







  138 








  138 






    6 




  133 



    6 



  133 





  129 


   43 






   57 





   25 









    6 



  133 





  137 








































   18 



















   16 









    2 
    2 


   17 
   17 


    4 



   17 





   17 
    2 



   16 

























    1 














    1 

























    8 
    7 




    2 





  139 



  127 
    2 


   10 







  135 







    2 


    2 














  126 


    4 


    2 














    2 
    3 




    3 

    5 



    4 










  108 











    7 
  102 




  106 


    2 
















    7 



  100 



    6 




   14 




   99 
    5 

   14 



















    2 


    6 
   37 




   29 
   35 



   15 



   31 

   10 




    3 



    6 






   30 






    8 



   16 
    8 

   23 

    1 


























   24 



   45 







   45 






    8 



    1 























    7 







    2 




    1 







    1 





   23 

    8 


















   16 
    1 
















































    7 












    8 






    8 





    5 


    3 









    4 











    6 

















    6 




    1 





    5 
















   15 




   15 



    6 


    1 





    6 











    2 










    2 










    1 






















    1 






    1 





    1 


    1 















   43 





   43 



    4 



    2 






   28 

    9 







    1 



   27 









   28 





    1 









    8 
    1 






   23 





   22 



    7 





   12 

    4 





    8 



    4 








   10 



    4 




    8 




    8 

































    1 





    1 



































    1 





    1 























   13 



   11 



    9 


















   17 






    4 




    8 

































   70 



   70 












    3 








   16 
   19 









   21 







   21 








   21 



   21 


















   11 










   13 


















    6 





    3 





    2 
    1 














   94 










   94 







   49 


   49 




   49 




   49 



   19 







    4 






   17 



    2 


    3 





    1 

   57 
   23 



   23 



   52 
   24 







   31 
   38 






   44 


    6 


   40 
    7 





   38 

    3 
   38 

    4 





   30 





    7 



   18 



    1 














   15 

   15 






   14 
   15 

   14 

    2 







   12 
   13 

   12 

    6 







   11 
   11 

   11 

    1 







    2 


    8 



    8 



    7 



    1 



















































































































































    1 












   50 





   50 









   50 








   45 
    4 



   48 

    2 




   47 

    3 




   47 
    3 













    1 






    3 
    2 



    2 
    3 



   44 


   47 
    1 






   49 



















































































































































   28 


    4 
    3 
    1 
    3 
    2 
    3 
    1 
    3 
    1 









   28 







   28 


   28 


   27 
    1 

   28 


   28 


   28 


   28 









   28 















    4 
    4 



    4 













    1 






















    6 


























   26 

















   25 

    1 
   26 













   28 


   28 



   28 







   54 


   53 





   54 









   52 



    2 










    1 









    1 


















    1 






   47 





   48 








    2 





   46 



    3 


   43 
    1 







   43 













   42 


    1 














   38 







    4 









    3 





   29 




    2 




    2 






    1 



    1 






    1 










   27 



   30 




   28 


    1 








   28 







   28 







   28 







   28 










   28 















   27 
    1 

   28 









    2 
   26 





   26 







   50 










    2 


    2 






    2 






    1 


















































    2 

    2 

















   50 

























   35 











    4 























    3 
    2 











    5 













    5 


    5 



    5 























































































    5 


















    3 



    3 
























  124 
































  124 
  124 
  124 

  124 
    2 




  124 
    2 




  124 
  123 
  124 
  124 
  124 
  124 
  124 

  124 





  124 
  123 




  123 





  123 





  123 
    4 



  124 
    3 




  124 
  124 
  124 
  123 
  124 
  124 
  124 
  124 
  124 
  124 
  124 
  123 

    2 





  124 

  124 

  124 







  123 

  124 





  124 
  123 
  123 
  124 
  124 
  124 
  124 








    2 








  123 



















  124 
  124 
  124 
  123 


  124 
  124 







  124 




  123 




  123 




  124 
















    1 





    8 








    5 
















    3 

    3 




    1 






    3 












    2 









    1 








    1 















    1 





   19 




    1 



   15 
    3 





























    2 

    1 

    2 



   13 


   13 












    3 





    2 
    1 



    1 



    5 





    5 




























    5 












































   31 




   27 



    1 


    2 




    1 






    1 






    2 





   16 





   39 









    4 
    6 

    2 


    4 
    4 

    2 


    6 







   46 









    4 



   46 

    3 











   30 
    4 
   33 

    1 
   33 

    1 
   34 



















   34 



   33 









   50 


























   37 
















   36 
    1 

   37 


   35 

    2 



   36 

    1 



    1 





   36 



















   34 

    2 




   34 

    2 



   34 

    2 




    2 


   31 

    4 

   31 


    3 
    1 




   34 
    1 


   34 
    1 




   35 



   34 

    1 

   35 




   34 






   34 





    3 

   28 























   21 














    1 


    1 


    1 


   18 




   17 









   16 









   16 
    1 



    2 






   15 


   10 


    7 

   15 

    2 



   15 

    2 




   17 



   17 



   17 



















   17 



   16 
    1 




   16 

    1 

   16 

    1 

   17 




   16 





   16 




    2 


    2 







    1 




   11 






   12 






   12 






    3 


    3 






















































    2 














































    8 




    8 



    7 
    1 

    5 








    6 













    6 




    2 





    4 



    3 







    5 





    5 
































































    6 









    5 









    1 






























    1 


















    1 




















    3 





    1 


    1 








    1 






    3 





    1 


    1 








    1 






    1 










    1 






    2 










    1 







    1 





















    4 









    3 









    1 






























    9 





    9 









    6 

    3 
    7 

    2 
    7 

    2 
    8 

    1 



    5 
    3 
    6 

    3 

    7 
    2 








    5 


    1 











    6 



    3 



   14 














    7 





    5 


    3 


    8 


    1 
    1 














    3 





    1 









    1 






































































































































































   30 






















   30 

   30 


   30 


   29 


   30 

   30 

   30 

   30 


   30 



   29 


   30 


   30 


   30 


   30 



   29 



   30 


   30 


   30 



   30 

   30 


   29 


   30 

   30 


   30 


   30 






   26 


    1 





    3 




   29 



   29 



   28 


   29 



   29 

   29 

   29 

   29 

   29 


















    7 

    1 



    5 

    3 



    6 

    2 



    7 





    8 





    7 
    1 

    6 
    1 


    1 







    1 







    1 




















    7 




    8 







    8 















    7 



















    8 















    9 























    4 







    2 









    2 



    3 


    5 





    5 




    5 

















    3 






    3 




    3 








    1 













    3 




    3 

    1 


    3 
    3 





    3 

    3 







    1 








    3 























































   16 








    2 


    1 




    6 
    7 

    9 

    6 





   13 




















































   10 



    9 
    2 


    7 










    7 
    7 













































































    5 



    4 








    1 























   72 



   72 

   21 










   65 













   65 



   65 








   13 










   37 




   22 






















   11 
    5 
   13 

    2 
   12 

    1 
   11 

    1 
   10 

    1 
    9 

    1 
    8 

    1 
    8 


    6 

    2 
    5 




    3 


    5 












   52 



















    2 











   10 

   10 


   42 


   34 
   13 


   11 


   40 




    7 












   38 
    9 

   43 
    4 




    3 







    4 





    2 


    1 






   41 


   41 

   41 


   41 

   40 








    1 






   41 



   42 









   35 
    6 
    1 









   35 
    6 






   41 

   41 

   31 
    7 




    1 




    2 






    4 




   34 

    3 






    8 















    2 

   26 

    1 




   29 







    2 


   29 












    3 









    1 


    2 












































































































































































































































































































































































































































    1 







    1 












































    1 




    1 




















    2 











    2 













    2 





























































    1 










    1 

















































   74 


    1 



    1 






    4 


    2 










   33 

   33 













    4 











    4 



   33 













    2 




    2 






    1 


   30 




















































    6 


    2 











   22 








   20 
    2 

























    3 






    3 



    3 









    3 



    3 

    3 






    3 




    3 





    3 
    1 



    3 





    3 










    3 






    3 











    3 


























    3 











    3 


















   10 














    5 

















    3 




    5 
    3 

    3 


    3 












































    1 




    1 


    1 


    1 



    1 



    1 



    1 



    1 



    1 



    1 















    7 














    5 



















    2 
    2 





    1 





    1 

















   24 











    1 





    1 


    1 



    6 



   11 

    4 



    2 


    3 


    4 







    1 
    3 











    7 





    2 



    1 






    1 















    1 






















    1 













    1 











    5 

    5 




    1 










  104 













    4 
    3 

   97 

   95 
    1 






    3 
    4 


   95 







    1 







    6 
    1 

    3 



   98 


    3 




   95 

    5 

   93 







    1 


    3 


    2 


   93 
    2 

    1 







   89 
    2 














   91 












































    2 








    2 



    1 





    1 































































































































































































































































































    3 







    3 



    1 


    1 





    1 











    1 











    3 







    3 



    1 


    1 





    1 


























    4 








   12 


   12 

    9 










   44 









    2 





   42 

    1 



    1 





   13 




   35 


    7 





   39 
    2 




    5 


    1 



   35 






    3 




















   32 





    3 







   30 
    3 



   30 
    1 

    2 




   32 




   16 




   11 

    4 









   17 



    3 











   12 
    7 






    1 









    1 



    3 





    3 













    3 


    2 





































































































































































































































































   63 










    2 






    7 



   55 



   59 







   10 


   47 






   35 






    5 
   30 

    1 



   30 
    5 





    1 




   34 


   32 

    3 

   27 
    9 

   34 

    1 


    9 


   25 


    2 




   27 



    4 

    2 


   31 

    1 
    1 


   29 
    3 

   29 
    3 



   29 

    1 


    1 




   31 


   31 


   31 


   29 
    2 



   30 




    1 




   30 
    1 











   31 




















   31 



















   30 
    1 






   30 









   30 





    1 

   30 













    1 








    1 

































































    3 




    3 



    1 




    2 


    2 







    6 








    1 








    4 




    1 


    1 




    8 










    1 





    3 
    2 
    1 

    1 






    2 
    2 



    2 

    2 

    2 

    2 

    4 






    2 






    7 
















    5 
    2 


    1 
    2 



    3 

    1 
    3 








    2 






    1 






    2 



    2 



    2 






    7 













    2 
    1 
    1 
    1 








    1 

    1 
    2 

    2 







    4 









    2 






    2 




   14 

   15 








    3 













    2 




    5 


    5 







































    5 












    2 












    2 




   47 

   47 










   28 


   19 



   15 




    1 


    8 
    7 

   14 






















   14 















   93 












    1 





   92 





















   64 








   26 






   89 








   56 

    6 



   56 


   27 



   80 





    1 
    1 





   81 






   24 






   52 







   19 


   22 




   46 













    3 




    1 





    2 



















    1 



    3 







    1 











    1 


    1 
    1 





    1 
































    1 



























    2 


    1 


















































































    6 
    3 





    5 



    3 


    3 


    2 








    1 
















    1 







    1 














    1 






   23 





    2 





    1 


   10 






    2 


    8 



    5 
    2 





    3 






    6 






    4 


    2 



    1 







   97 










   67 


   30 



   26 






   70 
    5 



   67 






    2 



   65 


    3 



   59 

    8 




   64 
    2 



   27 



   39 


   57 





    1 


    3 







   18 




   19 


   10 




   13 






   16 


    1 


    1 



   17 






    1 















































































































































































    1 





    1 






















































































































































































































































    1 









    1 



























































































































































































































































    1 




    1 





































































































































    1 






    1 
















































   13 







    1 





    2 


    5 


    3 
    2 


    2 


    1 








    1 
    1 

    2 










    2 



    2 






    1 





    2 









    2 






















    1 
    1 


















    6 




    1 









    2 






    4 











    1 







    1 



















    1 



    1 











    1 





    1 





































    1 



    1 








































































    1 








    1 




































































































































































































































    1 




    1 

















    2 





    2 















































































































































































    5 
















    5 








    1 




    1 
















    1 






    1 































    1 



    1 
























    1 







   13 







    3 




    2 


    8 



    4 





    2 






    2 






    3 



    3 










    1 



    1 


    1 
























































   10 


    4 


















    2 




    2 













































   20 










   17 
    3 
























































































































    5 









    1 











    2 




    1 
    2 
    1 









    2 
    4 






    1 







    1 









































    3 





    2 





    1 




    1 








    1 














































    1 




    1 
























    1 









    1 






    1 



    1 





    1 































    1 





    1 



    1 











    1 




    1 




































   10 




















    2 
    1 

    3 



    3 





    7 




    3 













    7 

    7 


    1 
    6 





    1 










    1 




























































    1 




    1 



















    2 












    1 

    1 



    1 
































    1 






   12 

    1 

    1 






   10 
    2 




   10 




    2 



    9 




    1 



    7 
    2 




    7 
    2 




    7 
    2 




    7 












    2 










    6 








   18 


   18 







    1 





   17 










   17 


    5 

    2 





   14 








    4 







    1 















    1 

























































































    1 





    1 















    1 

    1 




    1 



























    1 
    1 






















    3 









    1 


    2 












































































    2 





    1 





    1 







    1 











    1 




    1 

















    1 





    1 



    1 











































































































 1119 














   76 
    6 



 1041 




   22 




  934 













  935 








  946 








  193 







  194 





 1096 
    4 






  152 
  954 



  169 
 1002 




  177 






 1098 
 1097 

  171 



  195 

  745 



  148 








 1000 
  163 






  938 








































    1 









    1 















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































   55 



   55 











   55 






  121 











  121 

















   79 









    2 










   77 






   79 



   79 




   79 
   79 
















   79 








   79 





   79 




































   77 












   77 





    5 






    5 












    5 



    5 
































    1 























    1 
















    1 











    1 




    1 
























    2 
















    2 




    2 



    2 























































    1 




























    1 


















    1 








    1 

















































































































































































































































































































































































































































































































































    4 









































    4 















    7 















    7 









    7 






















































    3 



    3 









    5 



    5 




















    2 




    2 











    2 






  119 








  120 













  120 
























































































































    2 
















    2 


    2 




    2 

    2 

    2 



    2 

















    6 







    3 


    3 














    6 





    6 
    6 


    6 

















    3 














    3 
























































































































































































































































































































































































   24 

















   24 









   24 






   24 























































   24 




   24 
   24 

   24 













































































































































































































    6 





    6 


    6 


































































































































































































































































  490 





  104 


  399 

  399 


  399 









  399 



    1 

  399 







  399 

    3 
    2 







  399 
































































































    9 

















    9 


































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
4921
4922
4923
4924
4925
4926
4927
4928
4929
4930
4931
4932
4933
4934
4935
4936
4937
4938
4939
4940
4941
4942
4943
4944
4945
4946
4947
4948
4949
4950
4951
4952
4953
4954
4955
4956
4957
4958
4959
4960
4961
4962
4963
4964
4965
4966
4967
4968
4969
4970
4971
4972
4973
4974
4975
4976
4977
4978
4979
4980
4981
4982
4983
4984
4985
4986
4987
4988
4989
4990
4991
4992
4993
4994
4995
4996
4997
4998
4999
5000
5001
5002
5003
5004
5005
5006
5007
5008
5009
5010
5011
5012
5013
5014
5015
5016
5017
5018
5019
5020
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
5082
5083
5084
5085
5086
5087
5088
5089
5090
5091
5092
5093
5094
5095
5096
5097
5098
5099
5100
5101
5102
5103
5104
5105
5106
5107
5108
5109
5110
5111
5112
5113
5114
5115
5116
5117
5118
5119
5120
5121
5122
5123
5124
5125
5126
5127
5128
5129
5130
5131
5132
5133
5134
5135
5136
5137
5138
5139
5140
5141
5142
5143
5144
5145
5146
5147
5148
5149
5150
5151
5152
5153
5154
5155
5156
5157
5158
5159
5160
5161
5162
5163
5164
5165
5166
5167
5168
5169
5170
5171
5172
5173
5174
5175
5176
5177
5178
5179
5180
5181
5182
5183
5184
5185
5186
5187
5188
5189
5190
5191
5192
5193
5194
5195
5196
5197
5198
5199
5200
5201
5202
5203
5204
5205
5206
5207
5208
5209
5210
5211
5212
5213
5214
5215
5216
5217
5218
5219
5220
5221
5222
5223
5224
5225
5226
5227
5228
5229
5230
5231
5232
5233
5234
5235
5236
5237
5238
5239
5240
5241
5242
5243
5244
5245
5246
5247
5248
5249
5250
5251
5252
5253
5254
5255
5256
5257
5258
5259
5260
5261
5262
5263
5264
5265
5266
5267
5268
5269
5270
5271
5272
5273
5274
5275
5276
5277
5278
5279
5280
5281
5282
5283
5284
5285
5286
5287
5288
5289
5290
5291
5292
5293
5294
5295
5296
5297
5298
5299
5300
5301
5302
5303
5304
5305
5306
5307
5308
5309
5310
5311
5312
5313
5314
5315
5316
5317
5318
5319
5320
5321
5322
5323
5324
5325
5326
5327
5328
5329
5330
5331
5332
5333
5334
5335
5336
5337
5338
5339
5340
5341
5342
5343
5344
5345
5346
5347
5348
5349
5350
5351
5352
5353
5354
5355
5356
5357
5358
5359
5360
5361
5362
5363
5364
5365
5366
5367
5368
5369
5370
5371
5372
5373
5374
5375
5376
5377
5378
5379
5380
5381
5382
5383
5384
5385
5386
5387
5388
5389
5390
5391
5392
5393
5394
5395
5396
5397
5398
5399
5400
5401
5402
5403
5404
5405
5406
5407
5408
5409
5410
5411
5412
5413
5414
5415
5416
5417
5418
5419
5420
5421
5422
5423
5424
5425
5426
5427
5428
5429
5430
5431
5432
5433
5434
5435
5436
5437
5438
5439
5440
5441
5442
5443
5444
5445
5446
5447
5448
5449
5450
5451
5452
5453
5454
5455
5456
5457
5458
5459
5460
5461
5462
5463
5464
5465
5466
5467
5468
5469
5470
5471
5472
5473
5474
5475
5476
5477
5478
5479
5480
5481
5482
5483
5484
5485
5486
5487
5488
5489
5490
5491
5492
5493
5494
5495
5496
5497
5498
5499
5500
5501
5502
5503
5504
5505
5506
5507
5508
5509
5510
5511
5512
5513
5514
5515
5516
5517
5518
5519
5520
5521
5522
5523
5524
5525
5526
5527
5528
5529
5530
5531
5532
5533
5534
5535
5536
5537
5538
5539
5540
5541
5542
5543
5544
5545
5546
5547
5548
5549
5550
5551
5552
5553
5554
5555
5556
5557
5558
5559
5560
5561
5562
5563
5564
5565
5566
5567
5568
5569
5570
5571
5572
5573
5574
5575
5576
5577
5578
5579
5580
5581
5582
5583
5584
5585
5586
5587
5588
5589
5590
5591
5592
5593
5594
5595
5596
5597
5598
5599
5600
5601
5602
5603
5604
5605
5606
5607
5608
5609
5610
5611
5612
5613
5614
5615
5616
5617
5618
5619
5620
5621
5622
5623
5624
5625
5626
5627
5628
5629
5630
5631
5632
5633
5634
5635
5636
5637
5638
5639
5640
5641
5642
5643
5644
5645
5646
5647
5648
5649
5650
5651
5652
5653
5654
5655
5656
5657
5658
5659
5660
5661
5662
5663
5664
5665
5666
5667
5668
5669
5670
5671
5672
5673
5674
5675
5676
5677
5678
5679
5680
5681
5682
5683
5684
5685
5686
5687
5688
5689
5690
5691
5692
5693
5694
5695
5696
5697
5698
5699
5700
5701
5702
5703
5704
5705
5706
5707
5708
5709
5710
5711
5712
5713
5714
5715
5716
5717
5718
5719
5720
5721
5722
5723
5724
5725
5726
5727
5728
5729
5730
5731
5732
5733
5734
5735
5736
5737
5738
5739
5740
5741
5742
5743
5744
5745
5746
5747
5748
5749
5750
5751
5752
5753
5754
5755
5756
5757
5758
5759
5760
5761
5762
5763
5764
5765
5766
5767
5768
5769
5770
5771
5772
5773
5774
5775
5776
5777
5778
5779
5780
5781
5782
5783
5784
5785
5786
5787
5788
5789
5790
5791
5792
5793
5794
5795
5796
5797
5798
5799
5800
5801
5802
5803
5804
5805
5806
5807
5808
5809
5810
5811
5812
5813
5814
5815
5816
5817
5818
5819
5820
5821
5822
5823
5824
5825
5826
5827
5828
5829
5830
5831
5832
5833
5834
5835
5836
5837
5838
5839
5840
5841
5842
5843
5844
5845
5846
5847
5848
5849
5850
5851
5852
5853
5854
5855
5856
5857
5858
5859
5860
5861
5862
5863
5864
5865
5866
5867
5868
5869
5870
5871
5872
5873
5874
5875
5876
5877
5878
5879
5880
5881
5882
5883
5884
5885
5886
5887
5888
5889
5890
5891
5892
5893
5894
5895
5896
5897
5898
5899
5900
5901
5902
5903
5904
5905
5906
5907
5908
5909
5910
5911
5912
5913
5914
5915
5916
5917
5918
5919
5920
5921
5922
5923
5924
5925
5926
5927
5928
5929
5930
5931
5932
5933
5934
5935
5936
5937
5938
5939
5940
5941
5942
5943
5944
5945
5946
5947
5948
5949
5950
5951
5952
5953
5954
5955
5956
5957
5958
5959
5960
5961
5962
5963
5964
5965
5966
5967
5968
5969
5970
5971
5972
5973
5974
5975
5976
5977
5978
5979
5980
5981
5982
5983
5984
5985
5986
5987
5988
5989
5990
5991
5992
5993
5994
5995
5996
5997
5998
5999
6000
6001
6002
6003
6004
6005
6006
6007
6008
6009
6010
6011
6012
6013
6014
6015
6016
6017
6018
6019
6020
6021
6022
6023
6024
6025
6026
6027
6028
6029
6030
6031
6032
6033
6034
6035
6036
6037
6038
6039
6040
6041
6042
6043
6044
6045
6046
6047
6048
6049
6050
6051
6052
6053
6054
6055
6056
6057
6058
6059
6060
6061
6062
6063
6064
6065
6066
6067
6068
6069
6070
6071
6072
6073
6074
6075
6076
6077
6078
6079
6080
6081
6082
6083
6084
6085
6086
6087
6088
6089
6090
6091
6092
6093
6094
6095
6096
6097
6098
6099
6100
6101
6102
6103
6104
6105
6106
6107
6108
6109
6110
6111
6112
6113
6114
6115
6116
6117
6118
6119
6120
6121
6122
6123
6124
6125
6126
6127
6128
6129
6130
6131
6132
6133
6134
6135
6136
6137
6138
6139
6140
6141
6142
6143
6144
6145
6146
6147
6148
6149
6150
6151
6152
6153
6154
6155
6156
6157
6158
6159
6160
6161
6162
6163
6164
6165
6166
6167
6168
6169
6170
6171
6172
6173
6174
6175
6176
6177
6178
6179
6180
6181
6182
6183
6184
6185
6186
6187
6188
6189
6190
6191
6192
6193
6194
6195
6196
6197
6198
6199
6200
6201
6202
6203
6204
6205
6206
6207
6208
6209
6210
6211
6212
6213
6214
6215
6216
6217
6218
6219
6220
6221
6222
6223
6224
6225
6226
6227
6228
6229
6230
6231
6232
6233
6234
6235
6236
6237
6238
6239
6240
6241
6242
6243
6244
6245
6246
6247
6248
6249
6250
6251
6252
6253
6254
6255
6256
6257
6258
6259
6260
6261
6262
6263
6264
6265
6266
6267
6268
6269
6270
6271
6272
6273
6274
6275
6276
6277
6278
6279
6280
6281
6282
6283
6284
6285
6286
6287
6288
6289
6290
6291
6292
6293
6294
6295
6296
6297
6298
6299
6300
6301
6302
6303
6304
6305
6306
6307
6308
6309
6310
6311
6312
6313
6314
6315
6316
6317
6318
6319
6320
6321
6322
6323
6324
6325
6326
6327
6328
6329
6330
6331
6332
6333
6334
6335
6336
6337
6338
6339
6340
6341
6342
6343
6344
6345
6346
6347
6348
6349
6350
6351
6352
6353
6354
6355
6356
6357
6358
6359
6360
6361
6362
6363
6364
6365
6366
6367
6368
6369
6370
6371
6372
6373
6374
6375
6376
6377
6378
6379
6380
6381
6382
6383
6384
6385
6386
6387
6388
6389
6390
6391
6392
6393
6394
6395
6396
6397
6398
6399
6400
6401
6402
6403
6404
6405
6406
6407
6408
6409
6410
6411
6412
6413
6414
6415
6416
6417
6418
6419
6420
6421
6422
6423
6424
6425
6426
6427
6428
6429
6430
6431
6432
6433
6434
6435
6436
6437
6438
6439
6440
6441
6442
6443
6444
6445
6446
6447
6448
6449
6450
6451
6452
6453
6454
6455
6456
6457
6458
6459
6460
6461
6462
6463
6464
6465
6466
6467
6468
6469
6470
6471
6472
6473
6474
6475
6476
6477
6478
6479
6480
6481
6482
6483
6484
6485
6486
6487
6488
6489
6490
6491
6492
6493
6494
6495
6496
6497
6498
6499
6500
6501
6502
6503
6504
6505
6506
6507
6508
6509
6510
6511
6512
6513
6514
6515
6516
6517
6518
6519
6520
6521
6522
6523
6524
6525
6526
6527
6528
6529
6530
6531
6532
6533
6534
6535
6536
6537
6538
6539
6540
6541
6542
6543
6544
6545
6546
6547
6548
6549
6550
6551
6552
6553
6554
6555
6556
6557
6558
6559
6560
6561
6562
6563
6564
6565
6566
6567
6568
6569
6570
6571
6572
6573
6574
6575
6576
6577
6578
6579
6580
6581
6582
6583
6584
6585
6586
6587
6588
6589
6590
6591
6592
6593
6594
6595
6596
6597
6598
6599
6600
6601
6602
6603
6604
6605
6606
6607
6608
6609
6610
6611
6612
6613
6614
6615
6616
6617
6618
6619
6620
6621
6622
6623
6624
6625
6626
6627
6628
6629
6630
6631
6632
6633
6634
6635
6636
6637
6638
6639
6640
6641
6642
6643
6644
6645
6646
6647
6648
6649
6650
6651
6652
6653
6654
6655
6656
6657
6658
6659
6660
6661
6662
6663
6664
6665
6666
6667
6668
6669
6670
6671
6672
6673
6674
6675
6676
6677
6678
6679
6680
6681
6682
6683
6684
6685
6686
6687
6688
6689
6690
6691
6692
6693
6694
6695
6696
6697
6698
6699
6700
6701
6702
6703
6704
6705
6706
6707
6708
6709
6710
6711
6712
6713
6714
6715
6716
6717
6718
6719
6720
6721
6722
6723
6724
6725
6726
6727
6728
6729
6730
6731
6732
6733
6734
6735
6736
6737
6738
6739
6740
6741
6742
6743
6744
6745
6746
6747
6748
6749
6750
6751
6752
6753
6754
6755
6756
6757
6758
6759
6760
6761
6762
6763
6764
6765
6766
6767
6768
6769
6770
6771
6772
6773
6774
6775
6776
6777
6778
6779
6780
6781
6782
6783
6784
6785
6786
6787
6788
6789
6790
6791
6792
6793
6794
6795
6796
6797
6798
6799
6800
6801
6802
6803
6804
6805
6806
6807
6808
6809
6810
6811
6812
6813
6814
6815
6816
6817
6818
6819
6820
6821
6822
6823
6824
6825
6826
6827
6828
6829
6830
6831
6832
6833
6834
6835
6836
6837
6838
6839
6840
6841
6842
6843
6844
6845
6846
6847
6848
6849
6850
6851
6852
6853
6854
6855
6856
6857
6858
6859
6860
6861
6862
6863
6864
6865
6866
6867
6868
6869
6870
6871
6872
6873
6874
6875
6876
6877
6878
6879
6880
6881
6882
6883
6884
6885
6886
6887
6888
6889
6890
6891
6892
6893
6894
6895
6896
6897
6898
6899
6900
6901
6902
6903
6904
6905
6906
6907
6908
6909
6910
6911
6912
6913
6914
6915
6916
6917
6918
6919
6920
6921
6922
6923
6924
6925
6926
6927
6928
6929
6930
6931
6932
6933
6934
6935
6936
6937
6938
6939
6940
6941
6942
6943
6944
6945
6946
6947
6948
6949
6950
6951
6952
6953
6954
6955
6956
6957
6958
6959
6960
6961
6962
6963
6964
6965
6966
6967
6968
6969
6970
6971
6972
6973
6974
6975
6976
6977
6978
6979
6980
6981
6982
6983
6984
6985
6986
6987
6988
6989
6990
6991
6992
6993
6994
6995
6996
6997
6998
6999
7000
7001
7002
7003
7004
7005
7006
7007
7008
7009
7010
7011
7012
7013
7014
7015
7016
7017
7018
7019
7020
7021
7022
7023
7024
7025
7026
7027
7028
7029
7030
7031
7032
7033
7034
7035
7036
7037
7038
7039
7040
7041
7042
7043
7044
7045
7046
7047
7048
7049
7050
7051
7052
7053
7054
7055
7056
7057
7058
7059
7060
7061
7062
7063
7064
7065
7066
7067
7068
7069
7070
7071
7072
7073
7074
7075
7076
7077
7078
7079
7080
7081
7082
7083
7084
7085
7086
7087
7088
7089
7090
7091
7092
7093
7094
7095
7096
7097
7098
7099
7100
7101
7102
7103
7104
7105
7106
7107
7108
7109
7110
7111
7112
7113
7114
7115
7116
7117
7118
7119
7120
7121
7122
7123
7124
7125
7126
7127
7128
7129
7130
7131
7132
7133
7134
7135
7136
7137
7138
7139
7140
7141
7142
7143
7144
7145
7146
7147
7148
7149
7150
7151
7152
7153
7154
7155
7156
7157
7158
7159
7160
7161
7162
7163
7164
7165
7166
7167
7168
7169
7170
7171
7172
7173
7174
7175
7176
7177
7178
7179
7180
7181
7182
7183
7184
7185
7186
7187
7188
7189
7190
7191
7192
7193
7194
7195
7196
7197
7198
7199
7200
7201
7202
7203
7204
7205
7206
7207
7208
7209
7210
7211
7212
7213
7214
7215
7216
7217
7218
7219
7220
7221
7222
7223
7224
7225
7226
7227
7228
7229
7230
7231
7232
7233
7234
7235
7236
7237
7238
7239
7240
7241
7242
7243
7244
7245
7246
7247
7248
7249
7250
7251
7252
7253
7254
7255
7256
7257
7258
7259
7260
7261
7262
7263
7264
7265
7266
7267
7268
7269
7270
7271
7272
7273
7274
7275
7276
7277
7278
7279
7280
7281
7282
7283
7284
7285
7286
7287
7288
7289
7290
7291
7292
7293
7294
7295
7296
7297
7298
7299
7300
7301
7302
7303
7304
7305
7306
7307
7308
7309
7310
7311
7312
7313
7314
7315
7316
7317
7318
7319
7320
7321
7322
7323
7324
7325
7326
7327
7328
7329
7330
7331
7332
7333
7334
7335
7336
7337
7338
7339
7340
7341
7342
7343
7344
7345
7346
7347
7348
7349
7350
7351
7352
7353
7354
7355
7356
7357
7358
7359
7360
7361
7362
7363
7364
7365
7366
7367
7368
7369
7370
7371
7372
7373
7374
7375
7376
7377
7378
7379
7380
7381
7382
7383
7384
7385
7386
7387
7388
7389
7390
7391
7392
7393
7394
7395
7396
7397
7398
7399
7400
7401
7402
7403
7404
7405
7406
7407
7408
7409
7410
7411
7412
7413
7414
7415
7416
7417
7418
7419
7420
7421
7422
7423
7424
7425
7426
7427
7428
7429
7430
7431
7432
7433
7434
7435
7436
7437
7438
7439
7440
7441
7442
7443
7444
7445
7446
7447
7448
7449
7450
7451
7452
7453
7454
7455
7456
7457
7458
7459
7460
7461
7462
7463
7464
7465
7466
7467
7468
7469
7470
7471
7472
7473
7474
7475
7476
7477
7478
7479
7480
7481
7482
7483
7484
7485
7486
7487
7488
7489
7490
7491
7492
7493
7494
7495
7496
7497
7498
7499
7500
7501
7502
7503
7504
7505
7506
7507
7508
7509
7510
7511
7512
7513
7514
7515
7516
7517
7518
7519
7520
7521
7522
7523
7524
7525
7526
7527
7528
7529
7530
7531
7532
7533
7534
7535
7536
7537
7538
7539
7540
7541
7542
7543
7544
7545
7546
7547
7548
7549
7550
7551
7552
7553
7554
7555
7556
7557
7558
7559
7560
7561
7562
7563
7564
7565
7566
7567
7568
7569
7570
7571
7572
7573
7574
7575
7576
7577
7578
7579
7580
7581
7582
7583
7584
7585
7586
7587
7588
7589
7590
7591
7592
7593
7594
7595
7596
7597
7598
7599
7600
7601
7602
7603
7604
7605
7606
7607
7608
7609
7610
7611
7612
7613
7614
7615
7616
7617
7618
7619
7620
7621
7622
7623
7624
7625
7626
7627
7628
7629
7630
7631
7632
7633
7634
7635
7636
7637
7638
7639
7640
7641
7642
7643
7644
7645
7646
7647
7648
7649
7650
7651
7652
7653
7654
7655
7656
7657
7658
7659
7660
7661
7662
7663
7664
7665
7666
7667
7668
7669
7670
7671
7672
7673
7674
7675
7676
7677
7678
7679
7680
7681
7682
7683
7684
7685
7686
7687
7688
7689
7690
7691
7692
7693
7694
7695
7696
7697
7698
7699
7700
7701
7702
7703
7704
7705
7706
7707
7708
7709
7710
7711
7712
7713
7714
7715
7716
7717
7718
7719
7720
7721
7722
7723
7724
7725
7726
7727
7728
7729
7730
7731
7732
7733
7734
7735
7736
7737
7738
7739
7740
7741
7742
7743
7744
7745
7746
7747
7748
7749
7750
7751
7752
7753
7754
7755
7756
7757
7758
7759
7760
7761
7762
7763
7764
7765
7766
7767
7768
7769
7770
7771
7772
7773
7774
7775
7776
7777
7778
7779
7780
7781
7782
7783
7784
7785
7786
7787
7788
7789
7790
7791
7792
7793
7794
7795
7796
7797
7798
7799
7800
7801
7802
7803
7804
7805
7806
7807
7808
7809
7810
7811
7812
7813
7814
7815
7816
7817
7818
7819
7820
7821
7822
7823
7824
7825
7826
7827
7828
7829
7830
7831
7832
7833
7834
7835
7836
7837
7838
7839
7840
7841
7842
7843
7844
7845
7846
7847
7848
7849
7850
7851
7852
7853
7854
7855
7856
7857
7858
7859
7860
7861
7862
7863
7864
7865
7866
7867
7868
7869
7870
7871
7872
7873
7874
7875
7876
7877
7878
7879
7880
7881
7882
7883
7884
7885
7886
7887
7888
7889
7890
7891
7892
7893
7894
7895
7896
7897
7898
7899
7900
7901
7902
7903
7904
7905
7906
7907
7908
7909
7910
7911
7912
7913
7914
7915
7916
7917
7918
7919
7920
7921
7922
7923
7924
7925
7926
7927
7928
7929
7930
7931
7932
7933
7934
7935
7936
7937
7938
7939
7940
7941
7942
7943
7944
7945
7946
7947
7948
7949
7950
7951
7952
7953
7954
7955
7956
7957
7958
7959
7960
7961
7962
7963
7964
7965
7966
7967
7968
7969
7970
7971
7972
7973
7974
7975
7976
7977
7978
7979
7980
7981
7982
7983
7984
7985
7986
7987
7988
7989
7990
7991
7992
7993
7994
7995
7996
7997
7998
7999
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009
8010
8011
8012
8013
8014
8015
8016
8017
8018
8019
8020
8021
8022
8023
8024
8025
8026
8027
8028
8029
8030
8031
8032
8033
8034
8035
8036
8037
8038
8039
8040
8041
8042
8043
8044
8045
8046
8047
8048
8049
8050
8051
8052
8053
8054
8055
8056
8057
8058
8059
8060
8061
8062
8063
8064
8065
8066
8067
8068
8069
8070
8071
8072
8073
8074
8075
8076
8077
8078
8079
8080
8081
8082
8083
8084
8085
8086
8087
8088
8089
8090
8091
8092
8093
8094
8095
8096
8097
8098
8099
8100
8101
8102
8103
8104
8105
8106
8107
8108
8109
8110
8111
8112
8113
8114
8115
8116
8117
8118
8119
8120
8121
8122
8123
8124
8125
8126
8127
8128
8129
8130
8131
8132
8133
8134
8135
8136
8137
8138
8139
8140
8141
8142
8143
8144
8145
8146
8147
8148
8149
8150
8151
8152
8153
8154
8155
8156
8157
8158
8159
8160
8161
8162
8163
8164
8165
8166
8167
8168
8169
8170
8171
8172
8173
8174
8175
8176
8177
8178
8179
8180
8181
8182
8183
8184
8185
8186
8187
8188
8189
8190
8191
8192
8193
8194
8195
8196
8197
8198
8199
8200
8201
8202
8203
8204
8205
8206
8207
8208
8209
8210
8211
8212
8213
8214
8215
8216
8217
8218
8219
8220
8221
8222
8223
8224
8225
8226
8227
8228
8229
8230
8231
8232
8233
8234
8235
8236
8237
8238
8239
8240
8241
8242
8243
8244
8245
8246
8247
8248
8249
8250
8251
8252
8253
8254
8255
8256
8257
8258
8259
8260
8261
8262
8263
8264
8265
8266
8267
8268
8269
8270
8271
8272
8273
8274
8275
8276
8277
8278
8279
8280
8281
8282
8283
8284
8285
8286
8287
8288
8289
8290
8291
8292
8293
8294
8295
8296
8297
8298
8299
8300
8301
8302
8303
8304
8305
8306
8307
8308
8309
8310
8311
8312
8313
8314
8315
8316
8317
8318
8319
8320
8321
8322
8323
8324
8325
8326
8327
8328
8329
8330
8331
8332
8333
8334
8335
8336
8337
8338
8339
8340
8341
8342
8343
8344
8345
8346
8347
8348
8349
8350
8351
8352
8353
8354
8355
8356
8357
8358
8359
8360
8361
8362
8363
8364
8365
8366
8367
8368
8369
8370
8371
8372
8373
8374
8375
8376
8377
8378
8379
8380
8381
8382
8383
8384
8385
8386
8387
8388
8389
8390
8391
8392
8393
8394
8395
8396
8397
8398
8399
8400
8401
8402
8403
8404
8405
8406
8407
8408
8409
8410
8411
8412
8413
8414
8415
8416
8417
8418
8419
8420
8421
8422
8423
8424
8425
8426
8427
8428
8429
8430
8431
8432
8433
8434
8435
8436
8437
8438
8439
8440
8441
8442
8443
8444
8445
8446
8447
8448
8449
8450
8451
8452
8453
8454
8455
8456
8457
8458
8459
8460
8461
8462
8463
8464
8465
8466
8467
8468
8469
8470
8471
8472
8473
8474
8475
8476
8477
8478
8479
8480
8481
8482
8483
8484
8485
8486
8487
8488
8489
8490
8491
8492
8493
8494
8495
8496
8497
8498
8499
8500
8501
8502
8503
8504
8505
8506
8507
8508
8509
8510
8511
8512
8513
8514
8515
8516
8517
8518
8519
8520
8521
8522
8523
8524
8525
8526
8527
8528
8529
8530
8531
8532
8533
8534
8535
8536
8537
8538
8539
8540
8541
8542
8543
8544
8545
8546
8547
8548
8549
8550
8551
8552
8553
8554
8555
8556
8557
8558
8559
8560
8561
8562
8563
8564
8565
8566
8567
8568
8569
8570
8571
8572
8573
8574
8575
8576
8577
8578
8579
8580
8581
8582
8583
8584
8585
8586
8587
8588
8589
8590
8591
8592
8593
8594
8595
8596
8597
8598
8599
8600
8601
8602
8603
8604
8605
8606
8607
8608
8609
8610
8611
8612
8613
8614
8615
8616
8617
8618
8619
8620
8621
8622
8623
8624
8625
8626
8627
8628
8629
8630
8631
8632
8633
8634
8635
8636
8637
8638
8639
8640
8641
8642
8643
8644
8645
8646
8647
8648
8649
8650
8651
8652
8653
8654
8655
8656
8657
8658
8659
8660
8661
8662
8663
8664
8665
8666
8667
8668
8669
8670
8671
8672
8673
8674
8675
8676
8677
8678
8679
8680
8681
8682
8683
8684
8685
8686
8687
8688
8689
8690
8691
8692
8693
8694
8695
8696
8697
8698
8699
8700
8701
8702
8703
8704
8705
8706
8707
8708
8709
8710
8711
8712
8713
8714
8715
8716
8717
8718
8719
8720
8721
8722
8723
8724
8725
8726
8727
8728
8729
8730
8731
8732
8733
8734
8735
8736
8737
8738
8739
8740
8741
8742
8743
8744
8745
8746
8747
8748
8749
8750
8751
8752
8753
8754
8755
8756
8757
8758
8759
8760
8761
8762
8763
8764
8765
8766
8767
8768
8769
8770
8771
8772
8773
8774
8775
8776
8777
8778
8779
8780
8781
8782
8783
8784
8785
8786
8787
8788
8789
8790
8791
8792
8793
8794
8795
8796
8797
8798
8799
8800
8801
8802
8803
8804
8805
8806
8807
8808
8809
8810
8811
8812
8813
8814
8815
8816
8817
8818
8819
8820
8821
8822
8823
8824
8825
8826
8827
8828
8829
8830
8831
8832
8833
8834
8835
8836
8837
8838
8839
8840
8841
8842
8843
8844
8845
8846
8847
8848
8849
8850
8851
8852
8853
8854
8855
8856
8857
8858
8859
8860
8861
8862
8863
8864
8865
8866
8867
8868
8869
8870
8871
8872
8873
8874
8875
8876
8877
8878
8879
8880
8881
8882
8883
8884
8885
8886
8887
8888
8889
8890
8891
8892
8893
8894
8895
8896
8897
8898
8899
8900
8901
8902
8903
8904
8905
8906
8907
8908
8909
8910
8911
8912
8913
8914
8915
8916
8917
8918
8919
8920
8921
8922
8923
8924
8925
8926
8927
8928
8929
8930
8931
8932
8933
8934
8935
8936
8937
8938
8939
8940
8941
8942
8943
8944
8945
8946
8947
8948
8949
8950
8951
8952
8953
8954
8955
8956
8957
8958
8959
8960
8961
8962
8963
8964
8965
8966
8967
8968
8969
8970
8971
8972
8973
8974
8975
8976
8977
8978
8979
8980
8981
8982
8983
8984
8985
8986
8987
8988
8989
8990
8991
8992
8993
8994
8995
8996
8997
8998
8999
9000
9001
9002
9003
9004
9005
9006
9007
9008
9009
9010
9011
9012
9013
9014
9015
9016
9017
9018
9019
9020
9021
9022
9023
9024
9025
9026
9027
9028
9029
9030
9031
9032
9033
9034
9035
9036
9037
9038
9039
9040
9041
9042
9043
9044
9045
9046
9047
9048
9049
9050
9051
9052
9053
9054
9055
9056
9057
9058
9059
9060
9061
9062
9063
9064
9065
9066
9067
9068
9069
9070
9071
9072
9073
9074
9075
9076
9077
9078
9079
9080
9081
9082
9083
9084
9085
9086
9087
9088
9089
9090
9091
9092
9093
9094
9095
9096
9097
9098
9099
9100
9101
9102
9103
9104
9105
9106
9107
9108
9109
9110
9111
9112
9113
9114
9115
9116
9117
9118
9119
9120
9121
9122
9123
9124
9125
9126
9127
9128
9129
9130
9131
9132
9133
9134
9135
9136
9137
9138
9139
9140
9141
9142
9143
9144
9145
9146
9147
9148
9149
9150
9151
9152
9153
9154
9155
9156
9157
9158
9159
9160
9161
9162
9163
9164
9165
9166
9167
9168
9169
9170
9171
9172
9173
9174
9175
9176
9177
9178
9179
9180
9181
9182
9183
9184
9185
9186
9187
9188
9189
9190
9191
9192
9193
9194
9195
9196
9197
9198
9199
9200
9201
9202
9203
9204
9205
9206
9207
9208
9209
9210
9211
9212
9213
9214
9215
9216
9217
9218
9219
9220
9221
9222
9223
9224
9225
9226
9227
9228
9229
9230
9231
9232
9233
9234
9235
9236
9237
9238
9239
9240
9241
9242
9243
9244
9245
9246
9247
9248
9249
9250
9251
9252
9253
9254
9255
9256
9257
9258
9259
9260
9261
9262
9263
9264
9265
9266
9267
9268
9269
9270
9271
9272
9273
9274
9275
9276
9277
9278
9279
9280
9281
9282
9283
9284
9285
9286
9287
9288
9289
9290
9291
9292
9293
9294
9295
9296
9297
9298
9299
9300
9301
9302
9303
9304
9305
9306
9307
9308
9309
9310
9311
9312
9313
9314
9315
9316
9317
9318
9319
9320
9321
9322
9323
9324
9325
9326
9327
9328
9329
9330
9331
9332
9333
9334
9335
9336
9337
9338
9339
9340
9341
9342
9343
9344
9345
9346
9347
9348
9349
9350
9351
9352
9353
9354
9355
9356
9357
9358
9359
9360
9361
9362
9363
9364
9365
9366
9367
9368
9369
9370
9371
9372
9373
9374
9375
9376
9377
9378
9379
9380
9381
9382
9383
9384
9385
9386
9387
9388
9389
9390
9391
9392
9393
9394
9395
9396
9397
9398
9399
9400
9401
9402
9403
9404
9405
9406
9407
9408
9409
9410
9411
9412
9413
9414
9415
9416
9417
9418
9419
9420
9421
9422
9423
9424
9425
9426
9427
9428
9429
9430
9431
9432
9433
9434
9435
9436
9437
9438
9439
9440
9441
9442
9443
9444
9445
9446
9447
9448
9449
9450
9451
9452
9453
9454
9455
9456
9457
9458
9459
9460
9461
9462
9463
9464
9465
9466
9467
9468
9469
9470
9471
9472
9473
9474
9475
9476
9477
9478
9479
9480
9481
9482
9483
9484
9485
9486
9487
9488
9489
9490
9491
9492
9493
9494
9495
9496
9497
9498
9499
9500
9501
9502
9503
9504
9505
9506
9507
9508
9509
9510
9511
9512
9513
9514
9515
9516
9517
9518
9519
9520
9521
9522
9523
9524
9525
9526
9527
9528
9529
9530
9531
9532
9533
9534
9535
9536
9537
9538
9539
9540
9541
9542
9543
9544
9545
9546
9547
9548
9549
9550
9551
9552
9553
9554
9555
9556
9557
9558
9559
9560
9561
9562
9563
9564
9565
9566
9567
9568
9569
9570
9571
9572
9573
9574
9575
9576
9577
9578
9579
9580
9581
9582
9583
9584
9585
9586
9587
9588
9589
9590
9591
9592
9593
9594
9595
9596
9597
9598
9599
9600
9601
9602
9603
9604
9605
9606
9607
9608
9609
9610
9611
9612
9613
9614
9615
9616
9617
9618
9619
9620
9621
9622
9623
9624
9625
9626
9627
9628
9629
9630
9631
9632
9633
9634
9635
9636
9637
9638
9639
9640
9641
9642
9643
9644
9645
9646
9647
9648
9649
9650
9651
9652
9653
9654
9655
9656
9657
9658
9659
9660
9661
9662
9663
9664
9665
9666
9667
9668
9669
9670
9671
9672
9673
9674
9675
9676
9677
9678
9679
9680
9681
9682
9683
9684
9685
9686
9687
9688
9689
9690
9691
9692
9693
9694
9695
9696
9697
9698
9699
9700
9701
9702
9703
9704
9705
9706
9707
9708
9709
9710
9711
9712
9713
9714
9715
9716
9717
9718
9719
9720
9721
9722
9723
9724
9725
9726
9727
9728
9729
9730
9731
9732
9733
9734
9735
9736
9737
9738
9739
9740
9741
9742
9743
9744
9745
9746
9747
9748
9749
9750
9751
9752
9753
9754
9755
9756
9757
9758
9759
9760
9761
9762
9763
9764
9765
9766
9767
9768
9769
9770
9771
9772
9773
9774
9775
9776
9777
9778
9779
9780
9781
9782
9783
9784
9785
9786
9787
9788
9789
9790
9791
9792
9793
9794
9795
9796
9797
9798
9799
9800
9801
9802
9803
9804
9805
9806
9807
9808
9809
9810
9811
9812
9813
9814
9815
9816
9817
9818
9819
9820
9821
9822
9823
9824
9825
9826
9827
9828
9829
9830
9831
9832
9833
9834
9835
9836
9837
9838
9839
9840
9841
9842
9843
9844
9845
9846
9847
9848
9849
9850
9851
9852
9853
9854
9855
9856
9857
9858
9859
9860
9861
9862
9863
9864
9865
9866
9867
9868
9869
9870
9871
9872
9873
9874
9875
9876
9877
9878
9879
9880
9881
9882
9883
9884
9885
9886
9887
9888
9889
9890
9891
9892
9893
9894
9895
9896
9897
9898
9899
9900
9901
9902
9903
9904
9905
9906
9907
9908
9909
9910
9911
9912
9913
9914
9915
9916
9917
9918
9919
9920
9921
9922
9923
9924
9925
9926
9927
9928
9929
9930
9931
9932
9933
9934
9935
9936
9937
9938
9939
9940
9941
9942
9943
9944
9945
9946
9947
9948
9949
9950
9951
9952
9953
9954
9955
9956
9957
9958
9959
9960
9961
9962
9963
9964
9965
9966
9967
9968
9969
9970
9971
9972
9973
9974
9975
9976
9977
9978
9979
9980
9981
9982
9983
9984
9985
9986
9987
9988
9989
9990
9991
9992
9993
9994
9995
9996
9997
9998
9999
10000
10001
10002
10003
10004
10005
10006
10007
10008
10009
10010
10011
10012
10013
10014
10015
10016
10017
10018
10019
10020
10021
10022
10023
10024
10025
10026
10027
10028
10029
10030
10031
10032
10033
10034
10035
10036
10037
10038
10039
10040
10041
10042
10043
10044
10045
10046
10047
10048
10049
10050
10051
10052
10053
10054
10055
10056
10057
10058
10059
10060
10061
10062
10063
10064
10065
10066
10067
10068
10069
10070
10071
10072
10073
10074
10075
10076
10077
10078
10079
10080
10081
10082
10083
10084
10085
10086
10087
10088
10089
10090
10091
10092
10093
10094
10095
10096
10097
10098
10099
10100
10101
10102
10103
10104
10105
10106
10107
10108
10109
10110
10111
10112
10113
10114
10115
10116
10117
10118
10119
10120
10121
10122
10123
10124
10125
10126
10127
10128
10129
10130
10131
10132
10133
10134
10135
10136
10137
10138
10139
10140
10141
10142
10143
10144
10145
10146
10147
10148
10149
10150
10151
10152
10153
10154
10155
10156
10157
10158
10159
10160
10161
10162
10163
10164
10165
10166
10167
10168
10169
10170
10171
10172
10173
10174
10175
10176
10177
10178
10179
10180
10181
10182
10183
10184
10185
10186
10187
10188
10189
10190
10191
10192
10193
10194
10195
10196
10197
10198
10199
10200
10201
10202
10203
10204
10205
10206
10207
10208
10209
10210
10211
10212
10213
10214
10215
10216
10217
10218
10219
10220
10221
10222
10223
10224
10225
10226
10227
10228
10229
10230
10231
10232
10233
10234
10235
10236
10237
10238
10239
10240
10241
10242
10243
10244
10245
10246
10247
10248
10249
10250
10251
10252
10253
10254
10255
10256
10257
10258
10259
10260
10261
10262
10263
10264
10265
10266
10267
10268
10269
10270
10271
10272
10273
10274
10275
10276
10277
10278
10279
10280
10281
10282
10283
10284
10285
10286
10287
10288
10289
10290
10291
10292
10293
10294
10295
10296
10297
10298
10299
10300
10301
10302
10303
10304
10305
10306
10307
10308
10309
10310
10311
10312
10313
10314
10315
10316
10317
10318
10319
10320
10321
10322
10323
10324
10325
10326
10327
10328
10329
10330
10331
10332
10333
10334
10335
10336
10337
10338
10339
10340
10341
10342
10343
10344
10345
10346
10347
10348
10349
10350
10351
10352
10353
10354
10355
10356
10357
10358
10359
10360
10361
10362
10363
10364
10365
10366
10367
10368
10369
10370
10371
10372
10373
10374
10375
10376
10377
10378
10379
10380
10381
10382
10383
10384
10385
10386
10387
10388
10389
10390
10391
10392
10393
10394
10395
10396
10397
10398
10399
10400
10401
10402
10403
10404
10405
10406
10407
10408
10409
10410
10411
10412
10413
10414
10415
10416
10417
10418
10419
10420
10421
10422
10423
10424
10425
10426
10427
10428
10429
10430
10431
10432
10433
10434
10435
10436
10437
10438
10439
10440
10441
10442
10443
10444
10445
10446
10447
10448
10449
10450
10451
10452
10453
10454
10455
10456
10457
10458
10459
10460
10461
10462
10463
10464
10465
10466
10467
10468
10469
10470
10471
10472
10473
10474
10475
10476
10477
10478
10479
10480
10481
10482
10483
10484
10485
10486
10487
10488
10489
10490
10491
10492
10493
10494
10495
10496
10497
10498
10499
10500
10501
10502
10503
10504
10505
10506
10507
10508
10509
10510
10511
10512
10513
10514
10515
10516
10517
10518
10519
10520
10521
10522
10523
10524
10525
10526
10527
10528
10529
10530
10531
10532
10533
10534
10535
10536
10537
10538
10539
10540
10541
10542
10543
10544
10545
10546
10547
10548
10549
10550
10551
10552
10553
10554
10555
10556
10557
10558
10559
10560
10561
10562
10563
10564
10565
10566
10567
10568
10569
10570
10571
10572
10573
10574
10575
10576
10577
10578
10579
10580
10581
10582
10583
10584
10585
10586
10587
10588
10589
10590
10591
10592
10593
10594
10595
10596
10597
10598
10599
10600
10601
10602
10603
10604
10605
10606
10607
10608
10609
10610
10611
10612
10613
10614
10615
10616
10617
10618
10619
10620
10621
10622
10623
10624
10625
10626
10627
10628
10629
10630
10631
10632
10633
10634
10635
10636
10637
10638
10639
10640
10641
10642
10643
10644
10645
10646
10647
10648
10649
10650
10651
10652
10653
10654
10655
10656
10657
10658
10659
10660
10661
10662
10663
10664
10665
10666
10667
10668
10669
10670
10671
10672
10673
10674
10675
10676
10677
10678
10679
10680
10681
10682
10683
10684
10685
10686
10687
10688
10689
10690
10691
10692
10693
10694
10695
10696
10697
10698
10699
10700
10701
10702
10703
10704
10705
10706
10707
10708
10709
10710
10711
10712
10713
10714
10715
10716
10717
10718
10719
10720
10721
10722
10723
10724
10725
10726
10727
10728
10729
10730
10731
10732
10733
10734
10735
10736
10737
10738
10739
10740
10741
10742
10743
10744
10745
10746
10747
10748
10749
10750
10751
10752
10753
10754
10755
10756
10757
10758
10759
10760
10761
10762
10763
10764
10765
10766
10767
10768
10769
10770
10771
10772
10773
10774
10775
10776
10777
10778
10779
10780
10781
10782
10783
10784
10785
10786
10787
10788
10789
10790
10791
10792
10793
10794
10795
10796
10797
10798
10799
10800
10801
10802
10803
10804
10805
10806
10807
10808
10809
10810
10811
10812
10813
10814
10815
10816
10817
10818
10819
10820
10821
10822
10823
10824
10825
10826
10827
10828
10829
10830
10831
10832
10833
10834
10835
10836
10837
10838
10839
10840
10841
10842
10843
10844
10845
10846
10847
10848
10849
10850
10851
10852
10853
10854
10855
10856
10857
10858
10859
10860
10861
10862
10863
10864
10865
10866
10867
10868
10869
10870
10871
10872
10873
10874
10875
10876
10877
10878
10879
10880
10881
10882
10883
10884
10885
10886
10887
10888
10889
10890
10891
10892
10893
10894
10895
10896
10897
10898
10899
10900
10901
10902
10903
10904
10905
10906
10907
10908
10909
10910
10911
10912
10913
10914
10915
10916
10917
10918
10919
10920
10921
10922
10923
10924
10925
10926
10927
10928
10929
10930
10931
10932
10933
10934
10935
10936
10937
10938
10939
10940
10941
10942
10943
10944
10945
10946
10947
10948
10949
10950
10951
10952
10953
10954
10955
10956
10957
10958
10959
10960
10961
10962
10963
10964
10965
10966
10967
10968
10969
10970
10971
10972
10973
10974
10975
10976
10977
10978
10979
10980
10981
10982
10983
10984
10985
10986
10987
10988
10989
10990
10991
10992
10993
10994
10995
10996
10997
10998
10999
11000
11001
11002
11003
11004
11005
11006
11007
11008
11009
11010
11011
11012
11013
11014
11015
11016
11017
11018
11019
11020
11021
11022
11023
11024
11025
11026
11027
11028
11029
11030
11031
11032
11033
11034
11035
11036
11037
11038
11039
11040
11041
11042
11043
11044
11045
11046
11047
11048
11049
11050
11051
11052
11053
11054
11055
11056
11057
11058
11059
11060
11061
11062
11063
11064
11065
11066
11067
11068
11069
11070
11071
11072
11073
11074
11075
11076
11077
11078
11079
11080
11081
11082
11083
11084
11085
11086
11087
11088
11089
11090
11091
11092
11093
11094
11095
11096
11097
11098
11099
11100
11101
11102
11103
11104
11105
11106
11107
11108
11109
11110
11111
11112
11113
11114
11115
11116
11117
11118
11119
11120
11121
11122
11123
11124
11125
11126
11127
11128
11129
11130
11131
11132
11133
11134
11135
11136
11137
11138
11139
11140
11141
11142
11143
11144
11145
11146
11147
11148
11149
11150
11151
11152
11153
11154
11155
11156
11157
11158
11159
11160
11161
11162
11163
11164
11165
11166
11167
11168
11169
11170
11171
11172
11173
11174
11175
11176
11177
11178
11179
11180
11181
11182
11183
11184
11185
11186
11187
11188
11189
11190
11191
11192
11193
11194
11195
11196
11197
11198
11199
11200
11201
11202
11203
11204
11205
11206
11207
11208
11209
11210
11211
11212
11213
11214
11215
11216
11217
11218
11219
11220
11221
11222
11223
11224
11225
11226
11227
11228
11229
11230
11231
11232
11233
11234
11235
11236
11237
11238
11239
11240
11241
11242
11243
11244
11245
11246
11247
11248
11249
11250
11251
11252
11253
11254
11255
11256
11257
11258
11259
11260
11261
11262
11263
11264
11265
11266
11267
11268
11269
11270
11271
11272
11273
11274
11275
11276
11277
11278
11279
11280
11281
11282
11283
11284
11285
11286
11287
11288
11289
11290
11291
11292
11293
11294
11295
11296
11297
11298
11299
11300
11301
11302
11303
11304
11305
11306
11307
11308
11309
11310
11311
11312
11313
11314
11315
11316
11317
11318
11319
11320
11321
11322
11323
11324
11325
11326
11327
11328
11329
11330
11331
11332
11333
11334
11335
11336
11337
11338
11339
11340
11341
11342
11343
11344
11345
11346
11347
11348
11349
11350
11351
11352
11353
11354
11355
11356
11357
11358
11359
11360
11361
11362
11363
11364
11365
11366
11367
11368
11369
11370
11371
11372
11373
11374
11375
11376
11377
11378
11379
11380
11381
11382
11383
11384
11385
11386
11387
11388
11389
11390
11391
11392
11393
11394
11395
11396
11397
11398
11399
11400
11401
11402
11403
11404
11405
11406
11407
11408
11409
11410
11411
11412
11413
11414
11415
11416
11417
11418
11419
11420
11421
11422
11423
11424
11425
11426
11427
11428
11429
11430
11431
11432
11433
11434
11435
11436
11437
11438
11439
11440
11441
11442
11443
11444
11445
11446
11447
11448
11449
11450
11451
11452
11453
11454
11455
11456
11457
11458
11459
11460
11461
11462
11463
11464
11465
11466
11467
11468
11469
11470
11471
11472
11473
11474
11475
11476
11477
11478
11479
11480
11481
11482
11483
11484
11485
11486
11487
11488
11489
11490
11491
11492
11493
11494
11495
11496
11497
11498
11499
11500
11501
11502
11503
11504
11505
11506
11507
11508
11509
11510
11511
11512
11513
11514
11515
11516
11517
11518
11519
11520
11521
11522
11523
11524
11525
11526
11527
11528
11529
11530
11531
11532
11533
11534
11535
11536
11537
11538
11539
11540
11541
11542
11543
11544
11545
11546
11547
11548
11549
11550
11551
11552
11553
11554
11555
11556
11557
11558
11559
11560
11561
11562
11563
11564
11565
11566
11567
11568
11569
11570
11571
11572
11573
11574
11575
11576
11577
11578
11579
11580
11581
11582
11583
11584
11585
11586
11587
11588
11589
11590
11591
11592
11593
11594
11595
11596
11597
11598
11599
11600
11601
11602
11603
11604
11605
11606
11607
11608
11609
11610
11611
11612
11613
11614
11615
11616
11617
11618
11619
11620
11621
11622
11623
11624
11625
11626
11627
11628
11629
11630
11631
11632
11633
11634
11635
11636
11637
11638
11639
11640
11641
11642
11643
11644
11645
11646
11647
11648
11649
11650
11651
11652
11653
11654
11655
11656
11657
11658
11659
11660
11661
11662
11663
11664
11665
11666
11667
11668
11669
11670
11671
11672
11673
11674
11675
11676
11677
11678
11679
11680
11681
11682
11683
11684
11685
11686
11687
11688
11689
11690
11691
11692
11693
11694
11695
11696
11697
11698
11699
11700
11701
11702
11703
11704
11705
11706
11707
11708
11709
11710
11711
11712
11713
11714
11715
11716
11717
11718
11719
11720
11721
11722
11723
11724
11725
11726
11727
11728
11729
11730
11731
11732
11733
11734
11735
11736
11737
11738
11739
11740
11741
11742
11743
11744
11745
11746
11747
11748
11749
11750
11751
11752
11753
11754
11755
11756
11757
11758
11759
11760
11761
11762
11763
11764
11765
11766
11767
11768
11769
11770
11771
11772
11773
11774
11775
11776
11777
11778
11779
11780
11781
11782
11783
11784
11785
11786
11787
11788
11789
11790
11791
11792
11793
11794
11795
11796
11797
11798
11799
11800
11801
11802
11803
11804
11805
11806
11807
11808
11809
11810
11811
11812
11813
11814
11815
11816
11817
11818
11819
11820
11821
11822
11823
11824
11825
11826
11827
11828
11829
11830
11831
11832
11833
11834
11835
11836
11837
11838
11839
11840
11841
11842
11843
11844
11845
11846
11847
11848
11849
11850
11851
11852
11853
11854
11855
11856
11857
11858
11859
11860
11861
11862
11863
11864
11865
11866
11867
11868
11869
11870
11871
11872
11873
11874
11875
11876
11877
11878
11879
11880
11881
11882
11883
11884
11885
11886
11887
11888
11889
11890
11891
11892
11893
11894
11895
11896
11897
11898
11899
11900
11901
11902
11903
11904
11905
11906
11907
11908
11909
11910
11911
11912
11913
11914
11915
11916
11917
11918
11919
11920
11921
11922
11923
11924
11925
11926
11927
11928
11929
11930
11931
11932
11933
11934
11935
11936
11937
11938
11939
11940
11941
11942
11943
11944
11945
11946
11947
11948
11949
11950
11951
11952
11953
11954
11955
11956
11957
11958
11959
11960
11961
11962
11963
11964
11965
11966
11967
11968
11969
11970
11971
11972
11973
11974
11975
11976
11977
11978
11979
11980
11981
11982
11983
11984
11985
11986
11987
11988
11989
11990
11991
11992
11993
11994
11995
11996
11997
11998
11999
12000
12001
12002
12003
12004
12005
12006
12007
12008
12009
12010
12011
12012
12013
12014
12015
12016
12017
12018
12019
12020
12021
12022
12023
12024
12025
12026
12027
12028
12029
12030
12031
12032
12033
12034
12035
12036
12037
12038
12039
12040
12041
12042
12043
12044
12045
12046
12047
12048
12049
12050
12051
12052
12053
12054
12055
12056
12057
12058
12059
12060
12061
12062
12063
12064
12065
12066
12067
12068
12069
12070
12071
12072
12073
12074
12075
12076
12077
12078
12079
12080
12081
12082
12083
12084
12085
12086
12087
12088
12089
12090
12091
12092
12093
12094
12095
12096
12097
12098
12099
12100
12101
12102
12103
12104
12105
12106
12107
12108
12109
12110
12111
12112
12113
12114
12115
12116
12117
12118
12119
12120
12121
12122
12123
12124
12125
12126
12127
12128
12129
12130
12131
12132
12133
12134
12135
12136
12137
12138
12139
12140
12141
12142
12143
12144
12145
12146
12147
12148
12149
12150
12151
12152
12153
12154
12155
12156
12157
12158
12159
12160
12161
12162
12163
12164
12165
12166
12167
12168
12169
12170
12171
12172
12173
12174
12175
12176
12177
12178
12179
12180
12181
12182
12183
12184
12185
12186
12187
12188
12189
12190
12191
12192
12193
12194
12195
12196
12197
12198
12199
12200
12201
12202
12203
12204
12205
12206
12207
12208
12209
12210
12211
12212
12213
12214
12215
12216
12217
12218
12219
12220
12221
12222
12223
12224
12225
12226
12227
12228
12229
12230
12231
12232
12233
12234
12235
12236
12237
12238
12239
12240
12241
12242
12243
12244
12245
12246
12247
12248
12249
12250
12251
12252
12253
12254
12255
12256
12257
12258
12259
12260
12261
12262
12263
12264
12265
12266
12267
12268
12269
12270
12271
12272
12273
12274
12275
12276
12277
12278
12279
12280
12281
12282
12283
12284
12285
12286
12287
12288
12289
12290
12291
12292
12293
12294
12295
12296
12297
12298
12299
12300
12301
12302
12303
12304
12305
12306
12307
12308
12309
12310
12311
12312
12313
12314
12315
12316
12317
12318
12319
12320
12321
12322
12323
12324
12325
12326
12327
12328
12329
12330
12331
12332
12333
12334
12335
12336
12337
12338
12339
12340
12341
12342
12343
12344
12345
12346
12347
12348
12349
12350
12351
12352
12353
12354
12355
12356
12357
12358
12359
12360
12361
12362
12363
12364
12365
12366
12367
12368
12369
12370
12371
12372
12373
12374
12375
12376
12377
12378
12379
12380
12381
12382
12383
12384
12385
12386
12387
12388
12389
12390
12391
12392
12393
12394
12395
12396
12397
12398
12399
12400
12401
12402
12403
12404
12405
12406
12407
12408
12409
12410
12411
12412
12413
12414
12415
12416
12417
12418
12419
12420
12421
12422
12423
12424
12425
12426
12427
12428
12429
12430
12431
12432
12433
12434
12435
12436
12437
12438
12439
12440
12441
12442
12443
12444
12445
12446
12447
12448
12449
12450
12451
12452
12453
12454
12455
12456
12457
12458
12459
12460
12461
12462
12463
12464
12465
12466
12467
12468
12469
12470
12471
12472
12473
12474
12475
12476
12477
12478
12479
12480
12481
12482
12483
12484
12485
12486
12487
12488
12489
12490
12491
12492
12493
12494
12495
12496
12497
12498
12499
12500
12501
12502
12503
12504
12505
12506
12507
12508
12509
12510
12511
12512
12513
12514
12515
12516
12517
12518
12519
12520
12521
12522
12523
12524
12525
12526
12527
12528
12529
12530
12531
12532
12533
12534
12535
12536
12537
12538
12539
12540
12541
12542
12543
12544
12545
12546
12547
12548
12549
12550
12551
12552
12553
12554
12555
12556
12557
12558
12559
12560
12561
12562
12563
12564
12565
12566
12567
12568
12569
12570
12571
12572
12573
12574
12575
12576
12577
12578
12579
12580
12581
12582
12583
12584
12585
12586
12587
12588
12589
12590
12591
12592
12593
12594
12595
12596
12597
12598
12599
12600
12601
12602
12603
12604
12605
12606
12607
12608
12609
12610
12611
12612
12613
12614
12615
12616
12617
12618
12619
12620
12621
12622
12623
12624
12625
12626
12627
12628
12629
12630
12631
12632
12633
12634
12635
12636
12637
12638
12639
12640
12641
12642
12643
12644
12645
12646
12647
12648
12649
12650
12651
12652
12653
12654
12655
12656
12657
12658
12659
12660
12661
12662
12663
12664
12665
12666
12667
12668
12669
12670
12671
12672
12673
12674
12675
12676
12677
12678
12679
12680
12681
12682
12683
12684
12685
12686
12687
12688
12689
12690
12691
12692
12693
12694
12695
12696
12697
12698
12699
12700
12701
12702
12703
12704
12705
12706
12707
12708
12709
12710
12711
12712
12713
12714
12715
12716
12717
12718
12719
12720
12721
12722
12723
12724
12725
12726
12727
12728
12729
12730
12731
12732
12733
12734
12735
12736
12737
12738
12739
12740
12741
12742
12743
12744
12745
12746
12747
12748
12749
12750
12751
12752
12753
12754
12755
12756
12757
12758
12759
12760
12761
12762
12763
12764
12765
12766
12767
12768
12769
12770
12771
12772
12773
12774
12775
12776
12777
12778
12779
12780
12781
12782
12783
12784
12785
12786
12787
12788
12789
12790
12791
12792
12793
12794
12795
12796
12797
12798
12799
12800
12801
12802
12803
12804
12805
12806
12807
12808
12809
12810
12811
12812
12813
12814
12815
12816
12817
12818
12819
12820
12821
12822
12823
12824
12825
12826
12827
12828
12829
12830
12831
12832
12833
12834
12835
12836
12837
12838
12839
12840
12841
12842
12843
12844
12845
12846
12847
12848
12849
12850
12851
12852
12853
12854
12855
12856
12857
12858
12859
12860
12861
12862
12863
12864
12865
12866
12867
12868
12869
12870
12871
12872
12873
12874
12875
12876
12877
12878
12879
12880
12881
12882
12883
12884
12885
12886
12887
12888
12889
12890
12891
12892
12893
12894
12895
12896
12897
12898
12899
12900
12901
12902
12903
12904
12905
12906
12907
12908
12909
12910
12911
12912
12913
12914
12915
12916
12917
12918
12919
12920
12921
12922
12923
12924
12925
12926
12927
12928
12929
12930
12931
12932
12933
12934
12935
12936
12937
12938
12939
12940
12941
12942
12943
12944
12945
12946
12947
12948
12949
12950
12951
12952
12953
12954
12955
12956
12957
12958
12959
12960
12961
12962
12963
12964
12965
12966
12967
12968
12969
12970
12971
12972
12973
12974
12975
12976
12977
12978
12979
12980
12981
12982
12983
12984
12985
12986
12987
12988
12989
12990
12991
12992
12993
12994
12995
12996
12997
12998
12999
13000
13001
13002
13003
13004
13005
13006
13007
13008
13009
13010
13011
13012
13013
13014
13015
13016
13017
13018
13019
13020
13021
13022
13023
13024
13025
13026
13027
13028
13029
13030
13031
13032
13033
13034
13035
13036
13037
13038
13039
13040
13041
13042
13043
13044
13045
13046
13047
13048
13049
13050
13051
13052
13053
13054
13055
13056
13057
13058
13059
13060
13061
13062
13063
13064
13065
13066
13067
13068
13069
13070
13071
13072
13073
13074
13075
13076
13077
13078
13079
13080
13081
13082
13083
13084
13085
13086
13087
13088
13089
13090
13091
13092
13093
13094
13095
13096
13097
13098
13099
13100
13101
13102
13103
13104
13105
13106
13107
13108
13109
13110
13111
13112
13113
13114
13115
13116
13117
13118
13119
13120
13121
13122
13123
13124
13125
13126
13127
13128
13129
13130
13131
13132
13133
13134
13135
13136
13137
13138
13139
13140
13141
13142
13143
13144
13145
13146
13147
13148
13149
13150
13151
13152
13153
13154
13155
13156
13157
13158
13159
13160
13161
13162
13163
13164
13165
13166
13167
13168
13169
13170
13171
13172
13173
13174
13175
13176
13177
13178
13179
13180
13181
13182
13183
13184
13185
13186
13187
13188
13189
13190
13191
13192
13193
13194
13195
13196
13197
13198
13199
13200
13201
13202
13203
13204
13205
13206
13207
13208
13209
13210
13211
13212
13213
13214
13215
13216
13217
13218
13219
13220
13221
13222
13223
13224
13225
13226
13227
13228
13229
13230
13231
13232
13233
13234
13235
13236
13237
13238
13239
13240
13241
13242
13243
13244
13245
13246
13247
13248
13249
13250
13251
13252
13253
13254
13255
13256
13257
13258
13259
13260
13261
13262
13263
13264
13265
13266
13267
13268
13269
13270
13271
13272
13273
13274
13275
13276
13277
13278
13279
13280
13281
13282
13283
13284
13285
13286
13287
13288
13289
13290
13291
13292
13293
13294
13295
13296
13297
13298
13299
13300
13301
13302
13303
13304
13305
13306
13307
13308
13309
13310
13311
13312
13313
13314
13315
13316
13317
13318
13319
13320
13321
13322
13323
13324
13325
13326
13327
13328
13329
13330
13331
13332
13333
13334
13335
13336
13337
13338
13339
13340
13341
13342
13343
13344
13345
13346
13347
13348
13349
13350
13351
13352
13353
13354
13355
13356
13357
13358
13359
13360
13361
13362
13363
13364
13365
13366
13367
13368
13369
13370
13371
13372
13373
13374
13375
13376
13377
13378
13379
13380
13381
13382
13383
13384
13385
13386
13387
13388
13389
13390
13391
13392
13393
13394
13395
13396
13397
13398
13399
13400
13401
13402
13403
13404
13405
13406
13407
13408
13409
13410
13411
13412
13413
13414
13415
13416
13417
13418
13419
13420
13421
13422
13423
13424
13425
13426
13427
13428
13429
13430
13431
13432
13433
13434
13435
13436
13437
13438
13439
13440
13441
13442
13443
13444
13445
13446
13447
13448
13449
13450
13451
13452
13453
13454
13455
13456
13457
13458
13459
13460
13461
13462
13463
13464
13465
13466
13467
13468
13469
13470
13471
13472
13473
13474
13475
13476
13477
13478
13479
13480
13481
13482
13483
13484
13485
13486
13487
13488
13489
13490
13491
13492
13493
13494
13495
13496
13497
13498
13499
13500
13501
13502
13503
13504
13505
13506
13507
13508
13509
13510
13511
13512
13513
13514
13515
13516
13517
13518
13519
13520
13521
13522
13523
13524
13525
13526
13527
13528
13529
13530
13531
13532
13533
13534
13535
13536
13537
13538
13539
13540
13541
13542
13543
13544
13545
13546
13547
13548
13549
13550
13551
13552
13553
13554
13555
13556
13557
13558
13559
13560
13561
13562
13563
13564
13565
13566
13567
13568
13569
13570
13571
13572
13573
13574
13575
13576
13577
13578
13579
13580
13581
13582
13583
13584
13585
13586
13587
13588
13589
13590
13591
13592
13593
13594
13595
13596
13597
13598
13599
13600
13601
13602
13603
13604
13605
13606
13607
13608
13609
13610
13611
13612
13613
13614
13615
13616
13617
13618
13619
13620
13621
13622
13623
13624
13625
13626
13627
13628
13629
13630
13631
13632
13633
13634
13635
13636
13637
13638
13639
13640
13641
13642
13643
13644
13645
13646
13647
13648
13649
13650
13651
13652
13653
13654
13655
13656
13657
13658
13659
13660
13661
13662
13663
13664
13665
13666
13667
13668
13669
13670
13671
13672
13673
13674
13675
13676
13677
13678
13679
13680
13681
13682
13683
13684
13685
13686
13687
13688
13689
13690
13691
13692
13693
13694
13695
13696
13697
13698
13699
13700
13701
13702
13703
13704
13705
13706
13707
13708
13709
13710
13711
13712
13713
13714
13715
13716
13717
13718
13719
13720
13721
13722
13723
13724
13725
13726
13727
13728
13729
13730
13731
13732
13733
13734
13735
13736
13737
13738
13739
13740
13741
13742
13743
13744
13745
13746
13747
13748
13749
13750
13751
13752
13753
13754
13755
13756
13757
13758
13759
13760
13761
13762
13763
13764
13765
13766
13767
13768
13769
13770
13771
13772
13773
13774
13775
13776
13777
13778
13779
13780
13781
13782
13783
13784
13785
13786
13787
13788
13789
13790
13791
13792
13793
13794
13795
13796
13797
13798
13799
13800
13801
13802
13803
13804
13805
13806
13807
13808
13809
13810
13811
13812
13813
13814
13815
13816
13817
13818
13819
13820
13821
13822
13823
13824
13825
13826
13827
13828
13829
13830
13831
13832
13833
13834
13835
13836
13837
13838
13839
13840
13841
13842
13843
13844
13845
13846
13847
13848
13849
13850
13851
13852
13853
13854
13855
13856
13857
13858
13859
13860
13861
13862
13863
13864
13865
13866
13867
13868
13869
13870
13871
13872
13873
13874
13875
13876
13877
13878
13879
13880
13881
13882
13883
13884
13885
13886
13887
13888
13889
13890
13891
13892
13893
13894
13895
13896
13897
13898
13899
13900
13901
13902
13903
13904
13905
13906
13907
13908
13909
13910
13911
13912
13913
13914
13915
13916
13917
13918
13919
13920
13921
13922
13923
13924
13925
13926
13927
13928
13929
13930
13931
13932
13933
13934
13935
13936
13937
13938
13939
13940
13941
13942
13943
13944
13945
13946
13947
13948
13949
13950
13951
13952
13953
13954
13955
13956
13957
13958
13959
13960
13961
13962
13963
13964
13965
13966
13967
13968
13969
13970
13971
13972
13973
13974
13975
13976
13977
13978
13979
13980
13981
13982
13983
13984
13985
13986
13987
13988
13989
13990
13991
13992
13993
13994
13995
13996
13997
13998
13999
14000
14001
14002
14003
14004
14005
14006
14007
14008
14009
14010
14011
14012
14013
14014
14015
14016
14017
14018
14019
14020
14021
14022
14023
14024
14025
14026
14027
14028
14029
14030
14031
14032
14033
14034
14035
14036
14037
14038
14039
14040
14041
14042
14043
14044
14045
14046
14047
14048
14049
14050
14051
14052
14053
14054
14055
14056
14057
14058
14059
14060
14061
14062
14063
14064
14065
14066
14067
14068
14069
14070
14071
14072
14073
14074
14075
14076
14077
14078
14079
14080
14081
14082
14083
14084
14085
14086
14087
14088
14089
14090
14091
14092
14093
14094
14095
14096
14097
14098
14099
14100
14101
14102
14103
14104
14105
14106
14107
14108
14109
14110
14111
14112
14113
14114
14115
14116
14117
14118
14119
14120
14121
14122
14123
14124
14125
14126
14127
14128
14129
14130
14131
14132
14133
14134
14135
14136
14137
14138
14139
14140
14141
14142
14143
14144
14145
14146
14147
14148
14149
14150
14151
14152
14153
14154
14155
14156
14157
14158
14159
14160
14161
14162
14163
14164
14165
14166
14167
14168
14169
14170
14171
14172
14173
14174
14175
14176
14177
14178
14179
14180
14181
14182
14183
14184
14185
14186
14187
14188
14189
14190
14191
14192
14193
14194
14195
14196
14197
14198
14199
14200
14201
14202
14203
14204
14205
14206
14207
14208
14209
14210
14211
14212
14213
14214
14215
14216
14217
14218
14219
14220
14221
14222
14223
14224
14225
14226
14227
14228
14229
14230
14231
14232
14233
14234
14235
14236
14237
14238
14239
14240
14241
14242
14243
14244
14245
14246
14247
14248
14249
14250
14251
14252
14253
14254
14255
14256
14257
14258
14259
14260
14261
14262
14263
14264
14265
14266
14267
14268
14269
14270
14271
14272
14273
14274
14275
14276
14277
14278
14279
14280
14281
14282
14283
14284
14285
14286
14287
14288
14289
14290
14291
14292
14293
14294
14295
14296
14297
14298
14299
14300
14301
14302
14303
14304
14305
14306
14307
14308
14309
14310
14311
14312
14313
14314
14315
14316
14317
14318
14319
14320
14321
14322
14323
14324
14325
14326
14327
14328
14329
14330
14331
14332
14333
14334
14335
14336
14337
14338
14339
14340
14341
14342
14343
14344
14345
14346
14347
14348
14349
14350
14351
14352
14353
14354
14355
14356
14357
14358
14359
14360
14361
14362
14363
14364
14365
14366
14367
14368
14369
14370
14371
14372
14373
14374
14375
14376
14377
14378
14379
14380
14381
14382
14383
14384
14385
14386
14387
14388
14389
14390
14391
14392
14393
14394
14395
14396
14397
14398
14399
14400
14401
14402
14403
14404
14405
14406
14407
14408
14409
14410
14411
14412
14413
14414
14415
14416
14417
14418
14419
14420
14421
14422
14423
14424
14425
14426
14427
14428
14429
14430
14431
14432
14433
14434
14435
14436
14437
14438
14439
14440
14441
14442
14443
14444
14445
14446
14447
14448
14449
14450
14451
14452
14453
14454
14455
14456
14457
14458
14459
14460
14461
14462
14463
14464
14465
14466
14467
14468
14469
14470
14471
14472
14473
14474
14475
14476
14477
14478
14479
14480
14481
14482
14483
14484
14485
14486
14487
14488
14489
14490
14491
14492
14493
14494
14495
14496
14497
14498
14499
14500
14501
14502
14503
14504
14505
14506
14507
14508
14509
14510
14511
14512
14513
14514
14515
14516
14517
14518
14519
14520
14521
14522
14523
14524
14525
14526
14527
14528
14529
14530
14531
14532
14533
14534
14535
14536
14537
14538
14539
14540
14541
14542
14543
14544
14545
14546
14547
14548
14549
14550
14551
14552
14553
14554
14555
14556
14557
14558
14559
14560
14561
14562
14563
14564
14565
14566
14567
14568
14569
14570
14571
14572
14573
14574
14575
14576
14577
14578
14579
14580
14581
14582
14583
14584
14585
14586
14587
14588
14589
14590
14591
14592
14593
14594
14595
14596
14597
14598
14599
14600
14601
14602
14603
14604
14605
14606
14607
14608
14609
14610
14611
14612
14613
14614
14615
14616
14617
14618
14619
14620
14621
14622
14623
14624
14625
14626
14627
14628
14629
14630
14631
14632
14633
14634
14635
14636
14637
14638
14639
14640
14641
14642
14643
14644
14645
14646
14647
14648
14649
14650
14651
14652
14653
14654
14655
14656
14657
14658
14659
14660
14661
14662
14663
14664
14665
14666
14667
14668
14669
14670
14671
14672
14673
14674
14675
14676
14677
14678
14679
14680
14681
14682
14683
14684
14685
14686
14687
14688
14689
14690
14691
14692
14693
14694
14695
14696
14697
14698
14699
14700
14701
14702
14703
14704
14705
14706
14707
14708
14709
14710
14711
14712
14713
14714
14715
14716
14717
14718
14719
14720
14721
14722
14723
14724
14725
14726
14727
14728
14729
14730
14731
14732
14733
14734
14735
14736
14737
14738
14739
14740
14741
14742
14743
14744
14745
14746
14747
14748
14749
14750
14751
14752
14753
14754
14755
14756
14757
14758
14759
14760
14761
14762
14763
14764
14765
14766
14767
14768
14769
14770
14771
14772
14773
14774
14775
14776
14777
14778
14779
14780
14781
14782
14783
14784
14785
14786
14787
14788
14789
14790
14791
14792
14793
14794
14795
14796
14797
14798
14799
14800
14801
14802
14803
14804
14805
14806
14807
14808
14809
14810
14811
14812
14813
14814
14815
14816
14817
14818
14819
14820
14821
14822
14823
14824
14825
14826
14827
14828
14829
14830
14831
14832
14833
14834
14835
14836
14837
14838
14839
14840
14841
14842
14843
14844
14845
14846
14847
14848
14849
14850
14851
14852
14853
14854
14855
14856
14857
14858
14859
14860
14861
14862
14863
14864
14865
14866
14867
14868
14869
14870
14871
14872
14873
14874
14875
14876
14877
14878
14879
14880
14881
14882
14883
14884
14885
14886
14887
14888
14889
14890
14891
14892
14893
14894
14895
14896
14897
14898
14899
14900
14901
14902
14903
14904
14905
14906
14907
14908
14909
14910
14911
14912
14913
14914
14915
14916
14917
14918
14919
14920
14921
14922
14923
14924
14925
14926
14927
14928
14929
14930
14931
14932
14933
14934
14935
14936
14937
14938
14939
14940
14941
14942
14943
14944
14945
14946
14947
14948
14949
14950
14951
14952
14953
14954
14955
14956
14957
14958
14959
14960
14961
14962
14963
14964
14965
14966
14967
14968
14969
14970
14971
14972
14973
14974
14975
14976
14977
14978
14979
14980
14981
14982
14983
14984
14985
14986
14987
14988
14989
14990
14991
14992
14993
14994
14995
14996
14997
14998
14999
15000
15001
15002
15003
15004
15005
15006
15007
15008
15009
15010
15011
15012
15013
15014
15015
15016
15017
15018
15019
15020
15021
15022
15023
15024
15025
15026
15027
15028
15029
15030
15031
15032
15033
15034
15035
15036
15037
15038
15039
15040
15041
15042
15043
15044
15045
15046
15047
15048
15049
15050
15051
15052
15053
15054
15055
15056
15057
15058
15059
15060
15061
15062
15063
15064
15065
15066
15067
15068
15069
15070
15071
15072
15073
15074
15075
15076
15077
15078
15079
15080
15081
15082
15083
15084
15085
15086
15087
15088
15089
15090
15091
15092
15093
15094
15095
15096
15097
15098
15099
15100
15101
15102
15103
15104
15105
15106
15107
15108
15109
15110
15111
15112
15113
15114
15115
15116
15117
15118
15119
15120
15121
15122
15123
15124
15125
15126
15127
15128
15129
15130
15131
15132
15133
15134
15135
15136
15137
15138
15139
15140
15141
15142
15143
15144
15145
15146
15147
15148
15149
15150
15151
15152
15153
15154
15155
15156
15157
15158
15159
15160
15161
15162
15163
15164
15165
15166
15167
15168
15169
15170
15171
15172
15173
15174
15175
15176
15177
15178
15179
15180
15181
15182
15183
15184
15185
15186
15187
15188
15189
15190
15191
15192
15193
15194
15195
15196
15197
15198
15199
15200
15201
15202
15203
15204
15205
15206
15207
15208
15209
15210
15211
15212
15213
15214
15215
15216
15217
15218
15219
15220
15221
15222
15223
15224
15225
15226
15227
15228
15229
15230
15231
15232
15233
15234
15235
15236
15237
15238
15239
15240
15241
15242
15243
15244
15245
15246
15247
15248
15249
15250
15251
15252
15253
15254
15255
15256
15257
15258
15259
15260
15261
15262
15263
15264
15265
15266
15267
15268
15269
15270
15271
15272
15273
15274
15275
15276
15277
15278
15279
15280
15281
15282
15283
15284
15285
15286
15287
15288
15289
15290
15291
15292
15293
15294
15295
15296
15297
15298
15299
15300
15301
15302
15303
15304
15305
15306
15307
15308
15309
15310
15311
15312
15313
15314
15315
15316
15317
15318
15319
15320
15321
15322
15323
15324
15325
15326
15327
15328
15329
15330
15331
15332
15333
15334
15335
15336
15337
15338
15339
15340
15341
15342
15343
15344
15345
15346
15347
15348
15349
15350
15351
15352
15353
15354
15355
15356
15357
15358
15359
15360
15361
15362
15363
15364
15365
15366
15367
15368
15369
15370
15371
15372
15373
15374
15375
15376
15377
15378
15379
15380
15381
15382
15383
15384
15385
15386
15387
15388
15389
15390
15391
15392
15393
15394
15395
15396
15397
15398
15399
15400
15401
15402
15403
15404
15405
15406
15407
15408
15409
15410
15411
15412
15413
15414
15415
15416
15417
15418
15419
15420
15421
15422
15423
15424
15425
15426
15427
15428
15429
15430
15431
15432
15433
15434
15435
15436
15437
15438
15439
15440
15441
15442
15443
15444
15445
15446
15447
15448
15449
15450
15451
15452
15453
15454
15455
15456
15457
15458
15459
15460
15461
15462
15463
15464
15465
15466
15467
15468
15469
15470
15471
15472
15473
15474
15475
15476
15477
15478
15479
15480
15481
15482
15483
15484
15485
15486
15487
15488
15489
15490
15491
15492
15493
15494
15495
15496
15497
15498
15499
15500
15501
15502
15503
15504
15505
15506
15507
15508
15509
15510
15511
15512
15513
15514
15515
15516
15517
15518
15519
15520
15521
15522
15523
15524
15525
15526
15527
15528
15529
15530
15531
15532
15533
15534
15535
15536
15537
15538
15539
15540
15541
15542
15543
15544
15545
15546
15547
15548
15549
15550
15551
15552
15553
15554
15555
15556
15557
15558
15559
15560
15561
15562
15563
15564
15565
15566
15567
15568
15569
15570
15571
15572
15573
15574
15575
15576
15577
15578
15579
15580
15581
15582
15583
15584
15585
15586
15587
15588
15589
15590
15591
15592
15593
15594
15595
15596
15597
15598
15599
15600
15601
15602
15603
15604
15605
15606
15607
15608
15609
15610
15611
15612
15613
15614
15615
15616
15617
15618
15619
15620
15621
15622
15623
15624
15625
15626
15627
15628
15629
15630
15631
15632
15633
15634
15635
15636
15637
15638
15639
15640
15641
15642
15643
15644
15645
15646
15647
15648
15649
15650
15651
15652
15653
15654
15655
15656
15657
15658
15659
15660
15661
15662
15663
15664
15665
15666
15667
15668
15669
15670
15671
15672
15673
15674
15675
15676
15677
15678
15679
15680
15681
15682
15683
15684
15685
15686
15687
15688
15689
15690
15691
15692
15693
15694
15695
15696
15697
15698
15699
15700
15701
15702
15703
15704
15705
15706
15707
15708
15709
15710
15711
15712
15713
15714
15715
15716
15717
15718
15719
15720
15721
15722
15723
15724
15725
15726
15727
15728
15729
15730
15731
15732
15733
15734
15735
15736
15737
15738
15739
15740
15741
15742
15743
15744
15745
15746
15747
15748
15749
15750
15751
15752
15753
15754
15755
15756
15757
15758
15759
15760
15761
15762
15763
15764
15765
15766
15767
15768
15769
15770
15771
15772
15773
15774
15775
15776
15777
15778
15779
15780
15781
15782
15783
15784
15785
15786
15787
15788
15789
15790
15791
15792
15793
15794
15795
15796
15797
15798
15799
15800
15801
15802
15803
15804
15805
15806
15807
15808
15809
15810
15811
15812
15813
15814
15815
15816
15817
15818
15819
15820
15821
15822
15823
15824
15825
15826
15827
15828
15829
15830
15831
15832
15833
15834
15835
15836
15837
15838
15839
15840
15841
15842
15843
15844
15845
15846
15847
15848
15849
15850
15851
15852
15853
15854
15855
15856
15857
15858
15859
15860
15861
15862
15863
15864
15865
15866
15867
15868
15869
15870
15871
15872
15873
15874
15875
15876
15877
15878
15879
15880
15881
15882
15883
15884
15885
15886
15887
15888
15889
15890
15891
15892
15893
15894
15895
15896
15897
15898
15899
15900
15901
15902
15903
15904
15905
15906
15907
15908
15909
15910
15911
15912
15913
15914
15915
15916
15917
15918
15919
15920
15921
15922
15923
15924
15925
15926
15927
15928
15929
15930
15931
15932
15933
15934
15935
15936
15937
15938
15939
15940
15941
15942
15943
15944
15945
15946
15947
15948
15949
15950
15951
15952
15953
15954
15955
15956
15957
15958
15959
15960
15961
15962
15963
15964
15965
15966
15967
15968
15969
15970
15971
15972
15973
15974
15975
15976
15977
15978
15979
15980
15981
15982
15983
15984
15985
15986
15987
15988
15989
15990
15991
15992
15993
15994
15995
15996
15997
15998
15999
16000
16001
16002
16003
16004
16005
16006
16007
16008
16009
16010
16011
16012
16013
16014
16015
16016
16017
16018
16019
16020
16021
16022
16023
16024
16025
16026
16027
16028
16029
16030
16031
16032
16033
16034
16035
16036
16037
16038
16039
16040
16041
16042
16043
16044
16045
16046
16047
16048
16049
16050
16051
16052
16053
16054
16055
16056
16057
16058
16059
16060
16061
16062
16063
16064
16065
16066
16067
16068
16069
16070
16071
16072
16073
16074
16075
16076
16077
16078
16079
16080
16081
16082
16083
16084
16085
16086
16087
16088
16089
16090
16091
16092
16093
16094
16095
16096
16097
16098
16099
16100
16101
16102
16103
16104
16105
16106
16107
16108
16109
16110
16111
16112
16113
16114
16115
16116
16117
16118
16119
16120
16121
16122
16123
16124
16125
16126
16127
16128
16129
16130
16131
16132
16133
16134
16135
16136
16137
16138
16139
16140
16141
16142
16143
16144
16145
16146
16147
16148
16149
16150
16151
16152
16153
16154
16155
16156
16157
16158
16159
16160
16161
16162
16163
16164
16165
16166
16167
16168
16169
16170
16171
16172
16173
16174
16175
16176
16177
16178
16179
16180
16181
16182
16183
16184
16185
16186
16187
16188
16189
16190
16191
16192
16193
16194
16195
16196
16197
16198
16199
16200
16201
16202
16203
16204
16205
16206
16207
16208
16209
16210
16211
16212
16213
16214
16215
16216
16217
16218
16219
16220
16221
16222
16223
16224
16225
16226
16227
16228
16229
16230
16231
16232
16233
16234
16235
16236
16237
16238
16239
16240
16241
16242
16243
16244
16245
16246
16247
16248
16249
16250
16251
16252
16253
16254
16255
16256
16257
16258
16259
16260
16261
16262
16263
16264
16265
16266
16267
16268
16269
16270
16271
16272
16273
16274
16275
16276
16277
16278
16279
16280
16281
16282
16283
16284
16285
16286
16287
16288
16289
16290
16291
16292
16293
16294
16295
16296
16297
16298
16299
16300
16301
16302
16303
16304
16305
16306
16307
16308
16309
16310
16311
16312
16313
16314
16315
16316
16317
16318
16319
16320
16321
16322
16323
16324
16325
16326
16327
16328
16329
16330
16331
16332
16333
16334
16335
16336
16337
16338
16339
16340
16341
16342
16343
16344
16345
16346
16347
16348
16349
16350
16351
16352
16353
16354
16355
16356
16357
16358
16359
16360
16361
16362
16363
16364
16365
16366
16367
16368
16369
16370
16371
16372
16373
16374
16375
16376
16377
16378
16379
16380
16381
16382
16383
16384
16385
16386
16387
16388
16389
16390
16391
16392
16393
16394
16395
16396
16397
16398
16399
16400
16401
16402
16403
16404
16405
16406
16407
16408
16409
16410
16411
16412
16413
16414
16415
16416
16417
16418
16419
16420
16421
16422
16423
16424
16425
16426
16427
16428
16429
16430
16431
16432
16433
16434
16435
16436
16437
16438
16439
16440
16441
16442
16443
16444
16445
16446
16447
16448
16449
16450
16451
16452
16453
16454
16455
16456
16457
16458
16459
16460
16461
16462
16463
16464
16465
16466
16467
16468
16469
16470
16471
16472
16473
16474
16475
16476
16477
16478
16479
16480
16481
16482
16483
16484
16485
16486
16487
16488
16489
16490
16491
16492
16493
16494
16495
16496
16497
16498
16499
16500
16501
16502
16503
16504
16505
16506
16507
16508
16509
16510
16511
16512
16513
16514
16515
16516
16517
16518
16519
16520
16521
16522
16523
16524
16525
16526
16527
16528
16529
16530
16531
16532
16533
16534
16535
16536
16537
16538
16539
16540
16541
16542
16543
16544
16545
16546
16547
16548
16549
16550
16551
16552
16553
16554
16555
16556
16557
16558
16559
16560
16561
16562
16563
16564
16565
16566
16567
16568
16569
16570
16571
16572
16573
16574
16575
16576
16577
16578
16579
16580
16581
16582
16583
16584
16585
16586
16587
16588
16589
16590
16591
16592
16593
16594
16595
16596
16597
16598
16599
16600
16601
16602
16603
16604
16605
16606
16607
16608
16609
16610
16611
16612
16613
16614
16615
16616
16617
16618
16619
16620
16621
16622
16623
16624
16625
16626
16627
16628
16629
16630
16631
16632
16633
16634
16635
16636
16637
16638
16639
16640
16641
16642
16643
16644
16645
16646
16647
16648
16649
16650
16651
16652
16653
16654
16655
16656
16657
16658
16659
16660
16661
16662
16663
16664
16665
16666
16667
16668
16669
16670
16671
16672
16673
16674
16675
16676
16677
16678
16679
16680
16681
16682
16683
16684
16685
16686
16687
16688
16689
16690
16691
16692
16693
16694
16695
16696
16697
16698
16699
16700
16701
16702
16703
16704
16705
16706
16707
16708
16709
16710
16711
16712
16713
16714
16715
16716
16717
16718
16719
16720
16721
16722
16723
16724
16725
16726
16727
16728
16729
16730
16731
16732
16733
16734
16735
16736
16737
16738
16739
16740
16741
16742
16743
16744
16745
16746
16747
16748
16749
16750
16751
16752
16753
16754
16755
16756
16757
16758
16759
16760
16761
16762
16763
16764
16765
16766
16767
16768
16769
16770
16771
16772
16773
16774
16775
16776
16777
16778
16779
16780
16781
16782
16783
16784
16785
16786
16787
16788
16789
16790
16791
16792
16793
16794
16795
16796
16797
16798
16799
16800
16801
16802
16803
16804
16805
16806
16807
16808
16809
16810
16811
16812
16813
16814
16815
16816
16817
16818
16819
16820
16821
16822
16823
16824
16825
16826
16827
16828
16829
16830
16831
16832
16833
16834
16835
16836
16837
16838
16839
16840
16841
16842
16843
16844
16845
16846
16847
16848
16849
16850
16851
16852
16853
16854
16855
16856
16857
16858
16859
16860
16861
16862
16863
16864
16865
16866
16867
16868
16869
16870
16871
16872
16873
16874
16875
16876
16877
16878
16879
16880
16881
16882
16883
16884
16885
16886
16887
16888
16889
16890
16891
16892
16893
16894
16895
16896
16897
16898
16899
16900
16901
16902
16903
16904
16905
16906
16907
16908
16909
16910
16911
16912
16913
16914
16915
16916
16917
16918
16919
16920
16921
16922
16923
16924
16925
16926
16927
16928
16929
16930
16931
16932
16933
16934
16935
16936
16937
16938
16939
16940
16941
16942
16943
16944
16945
16946
16947
16948
16949
16950
16951
16952
16953
16954
16955
16956
16957
16958
16959
16960
16961
16962
16963
16964
16965
16966
16967
16968
16969
16970
16971
16972
16973
16974
16975
16976
16977
16978
16979
16980
16981
16982
16983
16984
16985
16986
16987
16988
16989
16990
16991
16992
16993
16994
16995
16996
16997
16998
16999
17000
17001
17002
17003
17004
17005
17006
17007
17008
17009
17010
17011
17012
17013
17014
17015
17016
17017
17018
17019
17020
17021
17022
17023
17024
17025
17026
17027
17028
17029
17030
17031
17032
17033
17034
17035
17036
17037
17038
17039
17040
17041
17042
17043
17044
17045
17046
17047
17048
17049
17050
17051
17052
17053
17054
17055
17056
17057
17058
17059
17060
17061
17062
17063
17064
17065
17066
17067
17068
17069
17070
17071
17072
17073
17074
17075
17076
17077
17078
17079
17080
17081
17082
17083
17084
17085
17086
17087
17088
17089
17090
17091
17092
17093
17094
17095
17096
17097
17098
17099
17100
17101
17102
17103
17104
17105
17106
17107
17108
17109
17110
17111
17112
17113
17114
17115
17116
17117
17118
17119
17120
17121
17122
17123
17124
17125
17126
17127
17128
17129
17130
17131
17132
17133
17134
17135
17136
17137
17138
17139
17140
17141
17142
17143
17144
17145
17146
17147
17148
17149
17150
17151
17152
17153
17154
17155
17156
17157
17158
17159
17160
17161
17162
17163
17164
17165
17166
17167
17168
17169
17170
17171
17172
17173
17174
17175
17176
17177
17178
17179
17180
17181
17182
17183
17184
17185
17186
17187
17188
17189
17190
17191
17192
17193
17194
17195
17196
17197
17198
17199
17200
17201
17202
17203
17204
17205
17206
17207
17208
17209
17210
17211
17212
17213
17214
17215
17216
17217
17218
17219
17220
17221
17222
17223
17224
17225
17226
17227
17228
17229
17230
17231
17232
17233
17234
17235
17236
17237
17238
17239
17240
17241
17242
17243
17244
17245
17246
17247
17248
17249
17250
17251
17252
17253
17254
17255
17256
17257
17258
17259
17260
17261
17262
17263
17264
17265
17266
17267
17268
17269
17270
17271
17272
17273
17274
17275
17276
17277
17278
17279
17280
17281
17282
17283
17284
17285
17286
17287
17288
17289
17290
17291
17292
17293
17294
17295
17296
17297
17298
17299
17300
17301
17302
17303
17304
17305
17306
17307
17308
17309
17310
17311
17312
17313
17314
17315
17316
17317
17318
17319
17320
17321
17322
17323
17324
17325
17326
17327
17328
17329
17330
17331
17332
17333
17334
17335
17336
17337
17338
17339
17340
17341
17342
17343
17344
17345
17346
17347
17348
17349
17350
17351
17352
17353
17354
17355
17356
17357
17358
17359
17360
17361
17362
17363
17364
17365
17366
17367
17368
17369
17370
17371
17372
17373
17374
17375
17376
17377
17378
17379
17380
17381
17382
17383
17384
17385
17386
17387
17388
17389
17390
17391
17392
17393
17394
17395
17396
17397
17398
17399
17400
17401
17402
17403
17404
17405
17406
17407
17408
17409
17410
17411
17412
17413
17414
17415
17416
17417
17418
17419
17420
17421
17422
17423
17424
17425
17426
17427
17428
17429
17430
17431
17432
17433
17434
17435
17436
17437
17438
17439
17440
17441
17442
17443
17444
17445
17446
17447
17448
17449
17450
17451
17452
17453
17454
17455
17456
17457
17458
17459
17460
17461
17462
17463
17464
17465
17466
17467
17468
17469
17470
17471
17472
17473
17474
17475
17476
17477
17478
17479
17480
17481
17482
17483
17484
17485
17486
17487
17488
17489
17490
17491
17492
17493
17494
17495
17496
17497
17498
17499
17500
17501
17502
17503
17504
17505
17506
17507
17508
17509
17510
17511
17512
17513
17514
17515
17516
17517
17518
17519
17520
17521
17522
17523
17524
17525
17526
17527
17528
17529
17530
17531
17532
17533
17534
17535
17536
17537
17538
17539
17540
17541
17542
17543
17544
17545
17546
17547
17548
17549
17550
17551
17552
17553
17554
17555
17556
17557
17558
17559
17560
17561
17562
17563
17564
17565
17566
17567
17568
17569
17570
17571
17572
17573
17574
17575
17576
17577
17578
17579
17580
17581
17582
17583
17584
17585
17586
17587
17588
17589
17590
17591
17592
17593
17594
17595
17596
17597
17598
17599
17600
17601
17602
17603
17604
17605
17606
17607
17608
17609
17610
17611
17612
17613
17614
17615
17616
17617
17618
17619
17620
17621
17622
17623
17624
17625
17626
17627
17628
17629
17630
17631
17632
17633
17634
17635
17636
17637
17638
17639
17640
17641
17642
17643
17644
17645
17646
17647
17648
17649
17650
17651
17652
17653
17654
17655
17656
17657
17658
17659
17660
17661
17662
17663
17664
17665
17666
17667
17668
17669
17670
17671
17672
17673
17674
17675
17676
17677
17678
17679
17680
17681
17682
17683
17684
17685
17686
17687
17688
17689
17690
17691
17692
17693
17694
17695
17696
17697
17698
17699
17700
17701
17702
17703
17704
17705
17706
17707
17708
17709
17710
17711
17712
17713
17714
17715
17716
17717
17718
17719
17720
17721
17722
17723
17724
17725
17726
17727
17728
17729
17730
17731
17732
17733
17734
17735
17736
17737
17738
17739
17740
17741
17742
17743
17744
17745
17746
17747
17748
17749
17750
17751
17752
17753
17754
17755
17756
17757
17758
17759
17760
17761
17762
17763
17764
17765
17766
17767
17768
17769
17770
17771
17772
17773
17774
17775
17776
17777
17778
17779
17780
17781
17782
17783
17784
17785
17786
17787
17788
17789
17790
17791
17792
17793
17794
17795
17796
17797
17798
17799
17800
17801
17802
17803
17804
17805
17806
17807
17808
17809
17810
17811
17812
17813
17814
17815
17816
17817
17818
17819
17820
17821
17822
17823
17824
17825
17826
17827
17828
17829
17830
17831
17832
17833
17834
17835
17836
17837
17838
17839
17840
17841
17842
17843
17844
17845
17846
17847
17848
17849
17850
17851
17852
17853
17854
17855
17856
17857
17858
17859
17860
17861
17862
17863
17864
17865
17866
17867
17868
17869
17870
17871
17872
17873
17874
17875
17876
17877
17878
17879
17880
17881
17882
17883
17884
17885
17886
17887
17888
17889
17890
17891
17892
17893
17894
17895
17896
17897
17898
17899
17900
17901
17902
17903
17904
17905
17906
17907
17908
17909
17910
17911
17912
17913
17914
17915
17916
17917
17918
17919
17920
17921
17922
17923
17924
17925
17926
17927
17928
17929
17930
17931
17932
17933
17934
17935
17936
17937
17938
17939
17940
17941
17942
17943
17944
17945
17946
17947
17948
17949
17950
17951
17952
17953
17954
17955
17956
17957
17958
17959
17960
17961
17962
17963
17964
17965
17966
17967
17968
17969
17970
17971
17972
17973
17974
17975
17976
17977
17978
17979
17980
17981
17982
17983
17984
17985
17986
17987
17988
17989
17990
17991
17992
17993
17994
17995
17996
17997
17998
17999
18000
18001
18002
18003
18004
18005
18006
18007
18008
18009
18010
18011
18012
18013
18014
18015
18016
18017
18018
18019
18020
18021
18022
18023
18024
18025
18026
18027
18028
18029
18030
18031
18032
18033
18034
18035
18036
18037
18038
18039
18040
18041
18042
18043
18044
18045
18046
18047
18048
18049
18050
18051
18052
18053
18054
18055
18056
18057
18058
18059
18060
18061
18062
18063
18064
18065
18066
18067
18068
18069
18070
18071
18072
18073
18074
18075
18076
18077
18078
18079
18080
18081
18082
18083
18084
18085
18086
18087
18088
18089
18090
18091
18092
18093
18094
18095
18096
18097
18098
18099
18100
18101
18102
18103
18104
18105
18106
18107
18108
18109
18110
18111
18112
18113
18114
18115
18116
18117
18118
18119
18120
18121
18122
18123
18124
18125
18126
18127
18128
18129
18130
18131
18132
18133
18134
18135
18136
18137
18138
18139
18140
18141
18142
18143
18144
18145
18146
18147
18148
18149
18150
18151
18152
18153
18154
18155
18156
18157
18158
18159
18160
18161
18162
18163
18164
18165
18166
18167
18168
18169
18170
18171
18172
18173
18174
18175
18176
18177
18178
18179
18180
18181
18182
18183
18184
18185
18186
18187
18188
18189
18190
18191
18192
18193
18194
18195
18196
18197
18198
18199
18200
18201
18202
18203
18204
18205
18206
18207
18208
18209
18210
18211
18212
18213
18214
18215
18216
18217
18218
18219
18220
18221
18222
18223
18224
18225
18226
18227
18228
18229
18230
18231
18232
18233
18234
18235
18236
18237
18238
18239
18240
18241
18242
18243
18244
18245
18246
18247
18248
18249
18250
18251
18252
18253
18254
18255
18256
18257
18258
18259
18260
18261
18262
18263
18264
18265
18266
18267
18268
18269
18270
18271
18272
18273
18274
18275
18276
18277
18278
18279
18280
18281
18282
18283
18284
18285
18286
18287
18288
18289
18290
18291
18292
18293
18294
18295
18296
18297
18298
18299
18300
18301
18302
18303
18304
18305
18306
18307
18308
18309
18310
18311
18312
18313
18314
18315
18316
18317
18318
18319
18320
18321
18322
18323
18324
18325
18326
18327
18328
18329
18330
18331
18332
18333
18334
18335
18336
18337
18338
18339
18340
18341
18342
18343
18344
18345
18346
18347
18348
18349
18350
18351
18352
18353
18354
18355
18356
18357
18358
18359
18360
18361
18362
18363
18364
18365
18366
18367
18368
18369
18370
18371
18372
18373
18374
18375
18376
18377
18378
18379
18380
18381
18382
18383
18384
18385
18386
18387
18388
18389
18390
18391
18392
18393
18394
18395
18396
18397
18398
18399
18400
18401
18402
18403
18404
18405
18406
18407
18408
18409
18410
18411
18412
18413
18414
18415
18416
18417
18418
18419
18420
18421
18422
18423
18424
18425
18426
18427
18428
18429
18430
18431
18432
18433
18434
18435
18436
18437
18438
18439
18440
18441
18442
18443
18444
18445
18446
18447
18448
18449
18450
18451
18452
18453
18454
18455
18456
18457
18458
18459
18460
18461
18462
18463
18464
18465
18466
18467
18468
18469
18470
18471
18472
18473
18474
18475
18476
18477
18478
18479
18480
18481
18482
18483
18484
18485
18486
18487
18488
18489
18490
18491
18492
18493
18494
18495
18496
18497
18498
18499
18500
18501
18502
18503
18504
18505
18506
18507
18508
18509
18510
18511
18512
18513
18514
18515
18516
18517
18518
18519
18520
18521
18522
18523
18524
18525
18526
18527
18528
18529
18530
18531
18532
18533
18534
18535
18536
18537
18538
18539
18540
18541
18542
18543
18544
18545
18546
18547
18548
18549
18550
18551
18552
18553
18554
18555
18556
18557
18558
18559
18560
18561
18562
18563
18564
18565
18566
18567
18568
18569
18570
18571
18572
18573
18574
18575
18576
18577
18578
18579
18580
18581
18582
18583
18584
18585
18586
18587
18588
18589
18590
18591
18592
18593
18594
18595
18596
18597
18598
18599
18600
18601
18602
18603
18604
18605
18606
18607
18608
18609
18610
18611
18612
18613
18614
18615
18616
18617
18618
18619
18620
18621
18622
18623
18624
18625
18626
18627
18628
18629
18630
18631
18632
18633
18634
18635
18636
18637
18638
18639
18640
18641
18642
18643
18644
18645
18646
18647
18648
18649
18650
18651
18652
18653
18654
18655
18656
18657
18658
18659
18660
18661
18662
18663
18664
18665
18666
18667
18668
18669
18670
18671
18672
18673
18674
18675
18676
18677
18678
18679
18680
18681
18682
18683
18684
18685
18686
18687
18688
18689
18690
18691
18692
18693
18694
18695
18696
18697
18698
18699
18700
18701
18702
18703
18704
18705
18706
18707
18708
18709
18710
18711
18712
18713
18714
18715
18716
18717
18718
18719
18720
18721
18722
18723
18724
18725
18726
18727
18728
18729
18730
18731
18732
18733
18734
18735
18736
18737
18738
18739
18740
18741
18742
18743
18744
18745
18746
18747
18748
18749
18750
18751
18752
18753
18754
18755
18756
18757
18758
18759
18760
18761
18762
18763
18764
18765
18766
18767
18768
18769
18770
18771
18772
18773
18774
18775
18776
18777
18778
18779
18780
18781
18782
18783
18784
18785
18786
18787
18788
18789
18790
18791
18792
18793
18794
18795
18796
18797
18798
18799
18800
18801
18802
18803
18804
18805
18806
18807
18808
18809
18810
18811
18812
18813
18814
18815
18816
18817
18818
18819
18820
18821
18822
18823
18824
18825
18826
18827
18828
18829
18830
18831
18832
18833
18834
18835
18836
18837
18838
18839
18840
18841
18842
18843
18844
18845
18846
18847
18848
18849
18850
18851
18852
18853
18854
18855
18856
18857
18858
18859
18860
18861
18862
18863
18864
18865
18866
18867
18868
18869
18870
18871
18872
18873
18874
18875
18876
18877
18878
18879
18880
18881
18882
18883
18884
18885
18886
18887
18888
18889
18890
18891
18892
18893
18894
18895
18896
18897
18898
18899
18900
18901
18902
18903
18904
18905
18906
18907
18908
18909
18910
18911
18912
18913
18914
18915
18916
18917
18918
18919
18920
18921
18922
18923
18924
18925
18926
18927
18928
18929
18930
18931
18932
18933
18934
18935
18936
18937
18938
18939
18940
18941
18942
18943
18944
18945
18946
18947
18948
18949
18950
18951
18952
18953
18954
18955
18956
18957
18958
18959
18960
18961
18962
18963
18964
18965
18966
18967
18968
18969
18970
18971
18972
18973
18974
18975
18976
18977
18978
18979
18980
18981
18982
18983
18984
18985
18986
18987
18988
18989
18990
18991
18992
18993
18994
18995
18996
18997
18998
18999
19000
19001
19002
19003
19004
19005
19006
19007
19008
19009
19010
19011
19012
19013
19014
19015
19016
19017
19018
19019
19020
19021
19022
19023
19024
19025
19026
19027
19028
19029
19030
19031
19032
19033
19034
19035
19036
19037
19038
19039
19040
19041
19042
19043
19044
19045
19046
19047
19048
19049
19050
19051
19052
19053
19054
19055
19056
19057
19058
19059
19060
19061
19062
19063
19064
19065
19066
19067
19068
19069
19070
19071
19072
19073
19074
19075
19076
19077
19078
19079
19080
19081
19082
19083
19084
19085
19086
19087
19088
19089
19090
19091
19092
19093
19094
19095
19096
19097
19098
19099
19100
19101
19102
19103
19104
19105
19106
19107
19108
19109
19110
19111
19112
19113
19114
19115
19116
19117
19118
19119
19120
19121
19122
19123
19124
19125
19126
19127
19128
19129
19130
19131
19132
19133
19134
19135
19136
19137
19138
19139
19140
19141
19142
19143
19144
19145
19146
19147
19148
19149
19150
19151
19152
19153
19154
19155
19156
19157
19158
19159
19160
19161
19162
19163
19164
19165
19166
19167
19168
19169
19170
19171
19172
19173
19174
19175
19176
19177
19178
19179
19180
19181
19182
19183
19184
19185
19186
19187
19188
19189
19190
19191
19192
19193
19194
19195
19196
19197
19198
19199
19200
19201
19202
19203
19204
19205
19206
19207
19208
19209
19210
19211
19212
19213
19214
19215
19216
19217
19218
19219
19220
19221
19222
19223
19224
19225
19226
19227
19228
19229
19230
19231
19232
19233
19234
19235
19236
19237
19238
19239
19240
19241
19242
19243
19244
19245
19246
19247
19248
19249
19250
19251
19252
19253
19254
19255
19256
19257
19258
19259
19260
19261
19262
19263
19264
19265
19266
19267
19268
19269
19270
19271
19272
19273
19274
19275
19276
19277
19278
19279
19280
19281
19282
19283
19284
19285
19286
19287
19288
19289
19290
19291
19292
19293
19294
19295
19296
19297
19298
19299
19300
19301
19302
19303
19304
19305
19306
19307
19308
19309
19310
19311
19312
19313
19314
19315
19316
19317
19318
19319
19320
19321
19322
19323
19324
19325
19326
19327
19328
19329
19330
19331
19332
19333
19334
19335
19336
19337
19338
19339
19340
19341
19342
19343
19344
19345
19346
19347
19348
19349
19350
19351
19352
19353
19354
19355
19356
19357
19358
19359
19360
19361
19362
19363
19364
19365
19366
19367
19368
19369
19370
19371
19372
19373
19374
19375
19376
19377
19378
19379
19380
19381
19382
19383
19384
19385
19386
19387
19388
19389
19390
19391
19392
19393
19394
19395
19396
19397
19398
19399
19400
19401
19402
19403
19404
19405
19406
19407
19408
19409
19410
19411
19412
19413
19414
19415
19416
19417
19418
19419
19420
19421
19422
19423
19424
19425
19426
19427
19428
19429
19430
19431
19432
19433
19434
19435
19436
19437
19438
19439
19440
19441
19442
19443
19444
19445
19446
19447
19448
19449
19450
19451
19452
19453
19454
19455
19456
19457
19458
19459
19460
19461
19462
19463
19464
19465
19466
19467
19468
19469
19470
19471
19472
19473
19474
19475
19476
19477
19478
19479
19480
19481
19482
19483
19484
19485
19486
19487
19488
19489
19490
19491
19492
19493
19494
19495
19496
19497
19498
19499
19500
19501
19502
19503
19504
19505
19506
19507
19508
19509
19510
19511
19512
19513
19514
19515
19516
19517
19518
19519
19520
19521
19522
19523
19524
19525
19526
19527
19528
19529
19530
19531
19532
19533
19534
19535
19536
19537
19538
19539
19540
19541
19542
19543
19544
19545
19546
19547
19548
19549
19550
19551
19552
19553
19554
19555
19556
19557
19558
19559
19560
19561
19562
19563
19564
19565
19566
19567
19568
19569
19570
19571
19572
19573
19574
19575
19576
19577
19578
19579
19580
19581
19582
19583
19584
19585
19586
19587
19588
19589
19590
19591
19592
19593
19594
19595
19596
19597
19598
19599
19600
19601
19602
19603
19604
19605
19606
19607
19608
19609
19610
19611
19612
19613
19614
19615
19616
19617
19618
19619
19620
19621
19622
19623
19624
19625
19626
19627
19628
19629
19630
19631
19632
19633
19634
19635
19636
19637
19638
19639
19640
19641
19642
19643
19644
19645
19646
19647
19648
19649
19650
19651
19652
19653
19654
19655
19656
19657
19658
19659
19660
19661
19662
19663
19664
19665
19666
19667
19668
19669
19670
19671
19672
19673
19674
19675
19676
19677
19678
19679
19680
19681
19682
19683
19684
19685
19686
19687
19688
19689
19690
19691
19692
19693
19694
19695
19696
19697
19698
19699
19700
19701
19702
19703
19704
19705
19706
19707
19708
19709
19710
19711
19712
19713
19714
19715
19716
19717
19718
19719
19720
19721
19722
19723
19724
19725
19726
19727
19728
19729
19730
19731
19732
19733
19734
19735
19736
19737
19738
19739
19740
19741
19742
19743
19744
19745
19746
19747
19748
19749
19750
19751
19752
19753
19754
19755
19756
19757
19758
19759
19760
19761
19762
19763
19764
19765
19766
19767
19768
19769
19770
19771
19772
19773
19774
19775
19776
19777
19778
19779
19780
19781
19782
19783
19784
19785
19786
19787
19788
19789
19790
19791
19792
19793
19794
19795
19796
19797
19798
19799
19800
19801
19802
19803
19804
19805
19806
19807
19808
19809
19810
19811
19812
19813
19814
19815
19816
19817
19818
19819
19820
19821
19822
19823
19824
19825
19826
19827
19828
19829
19830
19831
19832
19833
19834
19835
19836
19837
19838
19839
19840
19841
19842
19843
19844
19845
19846
19847
19848
19849
19850
19851
19852
19853
19854
19855
19856
19857
19858
19859
19860
19861
19862
19863
19864
19865
19866
19867
19868
19869
19870
19871
19872
19873
19874
19875
19876
19877
19878
19879
19880
19881
19882
19883
19884
19885
19886
19887
19888
19889
19890
19891
19892
19893
19894
19895
19896
19897
19898
19899
19900
19901
19902
19903
19904
19905
19906
19907
19908
19909
19910
19911
19912
19913
19914
19915
19916
19917
19918
19919
19920
19921
19922
19923
19924
19925
19926
19927
19928
19929
19930
19931
19932
19933
19934
19935
19936
19937
19938
19939
19940
19941
19942
19943
19944
19945
19946
19947
19948
19949
19950
19951
19952
19953
19954
19955
19956
19957
19958
19959
19960
19961
19962
19963
19964
19965
19966
19967
19968
19969
19970
19971
19972
19973
19974
19975
19976
19977
19978
19979
19980
19981
19982
19983
19984
19985
19986
19987
19988
19989
19990
19991
19992
19993
19994
19995
19996
19997
19998
19999
20000
20001
20002
20003
20004
20005
20006
20007
20008
20009
20010
20011
20012
20013
20014
20015
20016
20017
20018
20019
20020
20021
20022
20023
20024
20025
20026
20027
20028
20029
20030
20031
20032
20033
20034
20035
20036
20037
20038
20039
20040
20041
20042
20043
20044
20045
20046
20047
20048
20049
20050
20051
20052
20053
20054
20055
20056
20057
20058
20059
20060
20061
20062
20063
20064
20065
20066
20067
20068
20069
20070
20071
20072
20073
20074
20075
20076
20077
20078
20079
20080
20081
20082
20083
20084
20085
20086
20087
20088
20089
20090
20091
20092
20093
20094
20095
20096
20097
20098
20099
20100
20101
20102
20103
20104
20105
20106
20107
20108
20109
20110
20111
20112
20113
20114
20115
20116
20117
20118
20119
20120
20121
20122
20123
20124
20125
20126
20127
20128
20129
20130
20131
20132
20133
20134
20135
20136
20137
20138
20139
20140
20141
20142
20143
20144
20145
20146
20147
20148
20149
20150
20151
20152
20153
20154
20155
20156
20157
20158
20159
20160
20161
20162
20163
20164
20165
20166
20167
20168
20169
20170
20171
20172
20173
20174
20175
20176
20177
20178
20179
20180
20181
20182
20183
20184
20185
20186
20187
20188
20189
20190
20191
20192
20193
20194
20195
20196
20197
20198
20199
20200
20201
20202
20203
20204
20205
20206
20207
20208
20209
20210
20211
20212
20213
20214
20215
20216
20217
20218
20219
20220
20221
20222
20223
20224
20225
20226
20227
20228
20229
20230
20231
20232
20233
20234
20235
20236
20237
20238
20239
20240
20241
20242
20243
20244
20245
20246
20247
20248
20249
20250
20251
20252
20253
20254
20255
20256
20257
20258
20259
20260
20261
20262
20263
20264
20265
20266
20267
20268
20269
20270
20271
20272
20273
20274
20275
20276
20277
20278
20279
20280
20281
20282
20283
20284
20285
20286
20287
20288
20289
20290
20291
20292
20293
20294
20295
20296
20297
20298
20299
20300
20301
20302
20303
20304
20305
20306
20307
20308
20309
20310
20311
20312
20313
20314
20315
20316
20317
20318
20319
20320
20321
20322
20323
20324
20325
20326
20327
20328
20329
20330
20331
20332
20333
20334
20335
20336
20337
20338
20339
20340
20341
20342
20343
20344
20345
20346
20347
20348
20349
20350
20351
20352
20353
20354
20355
20356
20357
20358
20359
20360
20361
20362
20363
20364
20365
20366
20367
20368
20369
20370
20371
20372
20373
20374
20375
20376
20377
20378
20379
20380
20381
20382
20383
20384
20385
20386
20387
20388
20389
20390
20391
20392
// SPDX-License-Identifier: GPL-2.0-only
/*
 * This is the new netlink-based wireless configuration interface.
 *
 * Copyright 2006-2010        Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2013-2014  Intel Mobile Communications GmbH
 * Copyright 2015-2017        Intel Deutschland GmbH
 * Copyright (C) 2018-2024 Intel Corporation
 */

#include <linux/if.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/if_ether.h>
#include <linux/ieee80211.h>
#include <linux/nl80211.h>
#include <linux/rtnetlink.h>
#include <linux/netlink.h>
#include <linux/nospec.h>
#include <linux/etherdevice.h>
#include <linux/if_vlan.h>
#include <net/net_namespace.h>
#include <net/genetlink.h>
#include <net/cfg80211.h>
#include <net/sock.h>
#include <net/inet_connection_sock.h>
#include "core.h"
#include "nl80211.h"
#include "reg.h"
#include "rdev-ops.h"

static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
                                   struct genl_info *info,
                                   struct cfg80211_crypto_settings *settings,
                                   int cipher_limit);

/* the netlink family */
static struct genl_family nl80211_fam;

/* multicast groups */
enum nl80211_multicast_groups {
        NL80211_MCGRP_CONFIG,
        NL80211_MCGRP_SCAN,
        NL80211_MCGRP_REGULATORY,
        NL80211_MCGRP_MLME,
        NL80211_MCGRP_VENDOR,
        NL80211_MCGRP_NAN,
        NL80211_MCGRP_TESTMODE /* keep last - ifdef! */
};

static const struct genl_multicast_group nl80211_mcgrps[] = {
        [NL80211_MCGRP_CONFIG] = { .name = NL80211_MULTICAST_GROUP_CONFIG },
        [NL80211_MCGRP_SCAN] = { .name = NL80211_MULTICAST_GROUP_SCAN },
        [NL80211_MCGRP_REGULATORY] = { .name = NL80211_MULTICAST_GROUP_REG },
        [NL80211_MCGRP_MLME] = { .name = NL80211_MULTICAST_GROUP_MLME },
        [NL80211_MCGRP_VENDOR] = { .name = NL80211_MULTICAST_GROUP_VENDOR },
        [NL80211_MCGRP_NAN] = { .name = NL80211_MULTICAST_GROUP_NAN },
#ifdef CONFIG_NL80211_TESTMODE
        [NL80211_MCGRP_TESTMODE] = { .name = NL80211_MULTICAST_GROUP_TESTMODE }
#endif
};

/* returns ERR_PTR values */
static struct wireless_dev *
__cfg80211_wdev_from_attrs(struct cfg80211_registered_device *rdev,
                           struct net *netns, struct nlattr **attrs)
{
        struct wireless_dev *result = NULL;
        bool have_ifidx = attrs[NL80211_ATTR_IFINDEX];
        bool have_wdev_id = attrs[NL80211_ATTR_WDEV];
        u64 wdev_id = 0;
        int wiphy_idx = -1;
        int ifidx = -1;

        if (!have_ifidx && !have_wdev_id)
                return ERR_PTR(-EINVAL);

        if (have_ifidx)
                ifidx = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);
        if (have_wdev_id) {
                wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
                wiphy_idx = wdev_id >> 32;
        }

        if (rdev) {
                struct wireless_dev *wdev;

                lockdep_assert_held(&rdev->wiphy.mtx);

                list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
                        if (have_ifidx && wdev->netdev &&
                            wdev->netdev->ifindex == ifidx) {
                                result = wdev;
                                break;
                        }
                        if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
                                result = wdev;
                                break;
                        }
                }

                return result ?: ERR_PTR(-ENODEV);
        }

        ASSERT_RTNL();

        for_each_rdev(rdev) {
                struct wireless_dev *wdev;

                if (wiphy_net(&rdev->wiphy) != netns)
                        continue;

                if (have_wdev_id && rdev->wiphy_idx != wiphy_idx)
                        continue;

                list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
                        if (have_ifidx && wdev->netdev &&
                            wdev->netdev->ifindex == ifidx) {
                                result = wdev;
                                break;
                        }
                        if (have_wdev_id && wdev->identifier == (u32)wdev_id) {
                                result = wdev;
                                break;
                        }
                }

                if (result)
                        break;
        }

        if (result)
                return result;
        return ERR_PTR(-ENODEV);
}

static struct cfg80211_registered_device *
__cfg80211_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
{
        struct cfg80211_registered_device *rdev = NULL, *tmp;
        struct net_device *netdev;

        ASSERT_RTNL();

        if (!attrs[NL80211_ATTR_WIPHY] &&
            !attrs[NL80211_ATTR_IFINDEX] &&
            !attrs[NL80211_ATTR_WDEV])
                return ERR_PTR(-EINVAL);

        if (attrs[NL80211_ATTR_WIPHY])
                rdev = cfg80211_rdev_by_wiphy_idx(
                                nla_get_u32(attrs[NL80211_ATTR_WIPHY]));

        if (attrs[NL80211_ATTR_WDEV]) {
                u64 wdev_id = nla_get_u64(attrs[NL80211_ATTR_WDEV]);
                struct wireless_dev *wdev;
                bool found = false;

                tmp = cfg80211_rdev_by_wiphy_idx(wdev_id >> 32);
                if (tmp) {
                        /* make sure wdev exists */
                        list_for_each_entry(wdev, &tmp->wiphy.wdev_list, list) {
                                if (wdev->identifier != (u32)wdev_id)
                                        continue;
                                found = true;
                                break;
                        }

                        if (!found)
                                tmp = NULL;

                        if (rdev && tmp != rdev)
                                return ERR_PTR(-EINVAL);
                        rdev = tmp;
                }
        }

        if (attrs[NL80211_ATTR_IFINDEX]) {
                int ifindex = nla_get_u32(attrs[NL80211_ATTR_IFINDEX]);

                netdev = __dev_get_by_index(netns, ifindex);
                if (netdev) {
                        if (netdev->ieee80211_ptr)
                                tmp = wiphy_to_rdev(
                                        netdev->ieee80211_ptr->wiphy);
                        else
                                tmp = NULL;

                        /* not wireless device -- return error */
                        if (!tmp)
                                return ERR_PTR(-EINVAL);

                        /* mismatch -- return error */
                        if (rdev && tmp != rdev)
                                return ERR_PTR(-EINVAL);

                        rdev = tmp;
                }
        }

        if (!rdev)
                return ERR_PTR(-ENODEV);

        if (netns != wiphy_net(&rdev->wiphy))
                return ERR_PTR(-ENODEV);

        return rdev;
}

/*
 * This function returns a pointer to the driver
 * that the genl_info item that is passed refers to.
 *
 * The result of this can be a PTR_ERR and hence must
 * be checked with IS_ERR() for errors.
 */
static struct cfg80211_registered_device *
cfg80211_get_dev_from_info(struct net *netns, struct genl_info *info)
{
        return __cfg80211_rdev_from_attrs(netns, info->attrs);
}

static int validate_beacon_head(const struct nlattr *attr,
                                struct netlink_ext_ack *extack)
{
        const u8 *data = nla_data(attr);
        unsigned int len = nla_len(attr);
        const struct element *elem;
        const struct ieee80211_mgmt *mgmt = (void *)data;
        unsigned int fixedlen, hdrlen;
        bool s1g_bcn;

        if (len < offsetofend(typeof(*mgmt), frame_control))
                goto err;

        s1g_bcn = ieee80211_is_s1g_beacon(mgmt->frame_control);
        if (s1g_bcn) {
                fixedlen = offsetof(struct ieee80211_ext,
                                    u.s1g_beacon.variable);
                hdrlen = offsetof(struct ieee80211_ext, u.s1g_beacon);
        } else {
                fixedlen = offsetof(struct ieee80211_mgmt,
                                    u.beacon.variable);
                hdrlen = offsetof(struct ieee80211_mgmt, u.beacon);
        }

        if (len < fixedlen)
                goto err;

        if (ieee80211_hdrlen(mgmt->frame_control) != hdrlen)
                goto err;

        data += fixedlen;
        len -= fixedlen;

        for_each_element(elem, data, len) {
                /* nothing */
        }

        if (for_each_element_completed(elem, data, len))
                return 0;

err:
        NL_SET_ERR_MSG_ATTR(extack, attr, "malformed beacon head");
        return -EINVAL;
}

static int validate_ie_attr(const struct nlattr *attr,
                            struct netlink_ext_ack *extack)
{
        const u8 *data = nla_data(attr);
        unsigned int len = nla_len(attr);
        const struct element *elem;

        for_each_element(elem, data, len) {
                /* nothing */
        }

        if (for_each_element_completed(elem, data, len))
                return 0;

        NL_SET_ERR_MSG_ATTR(extack, attr, "malformed information elements");
        return -EINVAL;
}

static int validate_he_capa(const struct nlattr *attr,
                            struct netlink_ext_ack *extack)
{
        if (!ieee80211_he_capa_size_ok(nla_data(attr), nla_len(attr)))
                return -EINVAL;

        return 0;
}

/* policy for the attributes */
static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR];

static const struct nla_policy
nl80211_ftm_responder_policy[NL80211_FTM_RESP_ATTR_MAX + 1] = {
        [NL80211_FTM_RESP_ATTR_ENABLED] = { .type = NLA_FLAG, },
        [NL80211_FTM_RESP_ATTR_LCI] = { .type = NLA_BINARY,
                                        .len = U8_MAX },
        [NL80211_FTM_RESP_ATTR_CIVICLOC] = { .type = NLA_BINARY,
                                             .len = U8_MAX },
};

static const struct nla_policy
nl80211_pmsr_ftm_req_attr_policy[NL80211_PMSR_FTM_REQ_ATTR_MAX + 1] = {
        [NL80211_PMSR_FTM_REQ_ATTR_ASAP] = { .type = NLA_FLAG },
        [NL80211_PMSR_FTM_REQ_ATTR_PREAMBLE] = { .type = NLA_U32 },
        [NL80211_PMSR_FTM_REQ_ATTR_NUM_BURSTS_EXP] =
                NLA_POLICY_MAX(NLA_U8, 15),
        [NL80211_PMSR_FTM_REQ_ATTR_BURST_PERIOD] = { .type = NLA_U16 },
        [NL80211_PMSR_FTM_REQ_ATTR_BURST_DURATION] =
                NLA_POLICY_MAX(NLA_U8, 15),
        [NL80211_PMSR_FTM_REQ_ATTR_FTMS_PER_BURST] = { .type = NLA_U8 },
        [NL80211_PMSR_FTM_REQ_ATTR_NUM_FTMR_RETRIES] = { .type = NLA_U8 },
        [NL80211_PMSR_FTM_REQ_ATTR_REQUEST_LCI] = { .type = NLA_FLAG },
        [NL80211_PMSR_FTM_REQ_ATTR_REQUEST_CIVICLOC] = { .type = NLA_FLAG },
        [NL80211_PMSR_FTM_REQ_ATTR_TRIGGER_BASED] = { .type = NLA_FLAG },
        [NL80211_PMSR_FTM_REQ_ATTR_NON_TRIGGER_BASED] = { .type = NLA_FLAG },
        [NL80211_PMSR_FTM_REQ_ATTR_LMR_FEEDBACK] = { .type = NLA_FLAG },
        [NL80211_PMSR_FTM_REQ_ATTR_BSS_COLOR] = { .type = NLA_U8 },
};

static const struct nla_policy
nl80211_pmsr_req_data_policy[NL80211_PMSR_TYPE_MAX + 1] = {
        [NL80211_PMSR_TYPE_FTM] =
                NLA_POLICY_NESTED(nl80211_pmsr_ftm_req_attr_policy),
};

static const struct nla_policy
nl80211_pmsr_req_attr_policy[NL80211_PMSR_REQ_ATTR_MAX + 1] = {
        [NL80211_PMSR_REQ_ATTR_DATA] =
                NLA_POLICY_NESTED(nl80211_pmsr_req_data_policy),
        [NL80211_PMSR_REQ_ATTR_GET_AP_TSF] = { .type = NLA_FLAG },
};

static const struct nla_policy
nl80211_pmsr_peer_attr_policy[NL80211_PMSR_PEER_ATTR_MAX + 1] = {
        [NL80211_PMSR_PEER_ATTR_ADDR] = NLA_POLICY_ETH_ADDR,
        [NL80211_PMSR_PEER_ATTR_CHAN] = NLA_POLICY_NESTED(nl80211_policy),
        [NL80211_PMSR_PEER_ATTR_REQ] =
                NLA_POLICY_NESTED(nl80211_pmsr_req_attr_policy),
        [NL80211_PMSR_PEER_ATTR_RESP] = { .type = NLA_REJECT },
};

static const struct nla_policy
nl80211_pmsr_attr_policy[NL80211_PMSR_ATTR_MAX + 1] = {
        [NL80211_PMSR_ATTR_MAX_PEERS] = { .type = NLA_REJECT },
        [NL80211_PMSR_ATTR_REPORT_AP_TSF] = { .type = NLA_REJECT },
        [NL80211_PMSR_ATTR_RANDOMIZE_MAC_ADDR] = { .type = NLA_REJECT },
        [NL80211_PMSR_ATTR_TYPE_CAPA] = { .type = NLA_REJECT },
        [NL80211_PMSR_ATTR_PEERS] =
                NLA_POLICY_NESTED_ARRAY(nl80211_pmsr_peer_attr_policy),
};

static const struct nla_policy
he_obss_pd_policy[NL80211_HE_OBSS_PD_ATTR_MAX + 1] = {
        [NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET] =
                NLA_POLICY_RANGE(NLA_U8, 1, 20),
        [NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET] =
                NLA_POLICY_RANGE(NLA_U8, 1, 20),
        [NL80211_HE_OBSS_PD_ATTR_NON_SRG_MAX_OFFSET] =
                NLA_POLICY_RANGE(NLA_U8, 1, 20),
        [NL80211_HE_OBSS_PD_ATTR_BSS_COLOR_BITMAP] =
                NLA_POLICY_EXACT_LEN(8),
        [NL80211_HE_OBSS_PD_ATTR_PARTIAL_BSSID_BITMAP] =
                NLA_POLICY_EXACT_LEN(8),
        [NL80211_HE_OBSS_PD_ATTR_SR_CTRL] = { .type = NLA_U8 },
};

static const struct nla_policy
he_bss_color_policy[NL80211_HE_BSS_COLOR_ATTR_MAX + 1] = {
        [NL80211_HE_BSS_COLOR_ATTR_COLOR] = NLA_POLICY_RANGE(NLA_U8, 1, 63),
        [NL80211_HE_BSS_COLOR_ATTR_DISABLED] = { .type = NLA_FLAG },
        [NL80211_HE_BSS_COLOR_ATTR_PARTIAL] = { .type = NLA_FLAG },
};

static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
        [NL80211_TXRATE_LEGACY] = { .type = NLA_BINARY,
                                    .len = NL80211_MAX_SUPP_RATES },
        [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
                                .len = NL80211_MAX_SUPP_HT_RATES },
        [NL80211_TXRATE_VHT] = NLA_POLICY_EXACT_LEN_WARN(sizeof(struct nl80211_txrate_vht)),
        [NL80211_TXRATE_GI] = { .type = NLA_U8 },
        [NL80211_TXRATE_HE] = NLA_POLICY_EXACT_LEN(sizeof(struct nl80211_txrate_he)),
        [NL80211_TXRATE_HE_GI] =  NLA_POLICY_RANGE(NLA_U8,
                                                   NL80211_RATE_INFO_HE_GI_0_8,
                                                   NL80211_RATE_INFO_HE_GI_3_2),
        [NL80211_TXRATE_HE_LTF] = NLA_POLICY_RANGE(NLA_U8,
                                                   NL80211_RATE_INFO_HE_1XLTF,
                                                   NL80211_RATE_INFO_HE_4XLTF),
};

static const struct nla_policy
nl80211_tid_config_attr_policy[NL80211_TID_CONFIG_ATTR_MAX + 1] = {
        [NL80211_TID_CONFIG_ATTR_VIF_SUPP] = { .type = NLA_U64 },
        [NL80211_TID_CONFIG_ATTR_PEER_SUPP] = { .type = NLA_U64 },
        [NL80211_TID_CONFIG_ATTR_OVERRIDE] = { .type = NLA_FLAG },
        [NL80211_TID_CONFIG_ATTR_TIDS] = NLA_POLICY_RANGE(NLA_U16, 1, 0xff),
        [NL80211_TID_CONFIG_ATTR_NOACK] =
                        NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
        [NL80211_TID_CONFIG_ATTR_RETRY_SHORT] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_TID_CONFIG_ATTR_RETRY_LONG] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_TID_CONFIG_ATTR_AMPDU_CTRL] =
                        NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
        [NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL] =
                        NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
        [NL80211_TID_CONFIG_ATTR_AMSDU_CTRL] =
                        NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
        [NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE] =
                        NLA_POLICY_MAX(NLA_U8, NL80211_TX_RATE_FIXED),
        [NL80211_TID_CONFIG_ATTR_TX_RATE] =
                        NLA_POLICY_NESTED(nl80211_txattr_policy),
};

static const struct nla_policy
nl80211_fils_discovery_policy[NL80211_FILS_DISCOVERY_ATTR_MAX + 1] = {
        [NL80211_FILS_DISCOVERY_ATTR_INT_MIN] = NLA_POLICY_MAX(NLA_U32, 10000),
        [NL80211_FILS_DISCOVERY_ATTR_INT_MAX] = NLA_POLICY_MAX(NLA_U32, 10000),
        [NL80211_FILS_DISCOVERY_ATTR_TMPL] =
                        NLA_POLICY_RANGE(NLA_BINARY,
                                         NL80211_FILS_DISCOVERY_TMPL_MIN_LEN,
                                         IEEE80211_MAX_DATA_LEN),
};

static const struct nla_policy
nl80211_unsol_bcast_probe_resp_policy[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_MAX + 1] = {
        [NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_INT] = NLA_POLICY_MAX(NLA_U32, 20),
        [NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_TMPL] = { .type = NLA_BINARY,
                                                       .len = IEEE80211_MAX_DATA_LEN }
};

static const struct nla_policy
sar_specs_policy[NL80211_SAR_ATTR_SPECS_MAX + 1] = {
        [NL80211_SAR_ATTR_SPECS_POWER] = { .type = NLA_S32 },
        [NL80211_SAR_ATTR_SPECS_RANGE_INDEX] = {.type = NLA_U32 },
};

static const struct nla_policy
sar_policy[NL80211_SAR_ATTR_MAX + 1] = {
        [NL80211_SAR_ATTR_TYPE] = NLA_POLICY_MAX(NLA_U32, NUM_NL80211_SAR_TYPE),
        [NL80211_SAR_ATTR_SPECS] = NLA_POLICY_NESTED_ARRAY(sar_specs_policy),
};

static const struct nla_policy
nl80211_mbssid_config_policy[NL80211_MBSSID_CONFIG_ATTR_MAX + 1] = {
        [NL80211_MBSSID_CONFIG_ATTR_MAX_INTERFACES] = NLA_POLICY_MIN(NLA_U8, 2),
        [NL80211_MBSSID_CONFIG_ATTR_MAX_EMA_PROFILE_PERIODICITY] =
                                                NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_MBSSID_CONFIG_ATTR_INDEX] = { .type = NLA_U8 },
        [NL80211_MBSSID_CONFIG_ATTR_TX_IFINDEX] = { .type = NLA_U32 },
        [NL80211_MBSSID_CONFIG_ATTR_EMA] = { .type = NLA_FLAG },
};

static const struct nla_policy
nl80211_sta_wme_policy[NL80211_STA_WME_MAX + 1] = {
        [NL80211_STA_WME_UAPSD_QUEUES] = { .type = NLA_U8 },
        [NL80211_STA_WME_MAX_SP] = { .type = NLA_U8 },
};

static const struct netlink_range_validation nl80211_punct_bitmap_range = {
        .min = 0,
        .max = 0xffff,
};

static const struct netlink_range_validation q_range = {
        .max = INT_MAX,
};

static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
        [0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD },
        [NL80211_ATTR_WIPHY] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
                                      .len = 20-1 },
        [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },

        [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_CHANNEL_TYPE] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_EDMG_CHANNELS] = NLA_POLICY_RANGE(NLA_U8,
                                                NL80211_EDMG_CHANNELS_MIN,
                                                NL80211_EDMG_CHANNELS_MAX),
        [NL80211_ATTR_WIPHY_EDMG_BW_CONFIG] = NLA_POLICY_RANGE(NLA_U8,
                                                NL80211_EDMG_BW_CONFIG_MIN,
                                                NL80211_EDMG_BW_CONFIG_MAX),

        [NL80211_ATTR_CHANNEL_WIDTH] = { .type = NLA_U32 },
        [NL80211_ATTR_CENTER_FREQ1] = { .type = NLA_U32 },
        [NL80211_ATTR_CENTER_FREQ1_OFFSET] = NLA_POLICY_RANGE(NLA_U32, 0, 999),
        [NL80211_ATTR_CENTER_FREQ2] = { .type = NLA_U32 },

        [NL80211_ATTR_WIPHY_RETRY_SHORT] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_ATTR_WIPHY_RETRY_LONG] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_ATTR_WIPHY_FRAG_THRESHOLD] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_RTS_THRESHOLD] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_COVERAGE_CLASS] = { .type = NLA_U8 },
        [NL80211_ATTR_WIPHY_DYN_ACK] = { .type = NLA_FLAG },

        [NL80211_ATTR_IFTYPE] = NLA_POLICY_MAX(NLA_U32, NL80211_IFTYPE_MAX),
        [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
        [NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },

        [NL80211_ATTR_MAC] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_ATTR_PREV_BSSID] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),

        [NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
        [NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,
                                    .len = WLAN_MAX_KEY_LEN },
        [NL80211_ATTR_KEY_IDX] = NLA_POLICY_MAX(NLA_U8, 7),
        [NL80211_ATTR_KEY_CIPHER] = { .type = NLA_U32 },
        [NL80211_ATTR_KEY_DEFAULT] = { .type = NLA_FLAG },
        [NL80211_ATTR_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
        [NL80211_ATTR_KEY_TYPE] =
                NLA_POLICY_MAX(NLA_U32, NUM_NL80211_KEYTYPES),

        [NL80211_ATTR_BEACON_INTERVAL] = { .type = NLA_U32 },
        [NL80211_ATTR_DTIM_PERIOD] = { .type = NLA_U32 },
        [NL80211_ATTR_BEACON_HEAD] =
                NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_beacon_head,
                                       IEEE80211_MAX_DATA_LEN),
        [NL80211_ATTR_BEACON_TAIL] =
                NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_ie_attr,
                                       IEEE80211_MAX_DATA_LEN),
        [NL80211_ATTR_STA_AID] =
                NLA_POLICY_RANGE(NLA_U16, 1, IEEE80211_MAX_AID),
        [NL80211_ATTR_STA_FLAGS] = { .type = NLA_NESTED },
        [NL80211_ATTR_STA_LISTEN_INTERVAL] = { .type = NLA_U16 },
        [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY,
                                               .len = NL80211_MAX_SUPP_RATES },
        [NL80211_ATTR_STA_PLINK_ACTION] =
                NLA_POLICY_MAX(NLA_U8, NUM_NL80211_PLINK_ACTIONS - 1),
        [NL80211_ATTR_STA_TX_POWER_SETTING] =
                NLA_POLICY_RANGE(NLA_U8,
                                 NL80211_TX_POWER_AUTOMATIC,
                                 NL80211_TX_POWER_FIXED),
        [NL80211_ATTR_STA_TX_POWER] = { .type = NLA_S16 },
        [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 },
        [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ },
        [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY,
                                   .len = IEEE80211_MAX_MESH_ID_LEN },
        [NL80211_ATTR_MPATH_NEXT_HOP] = NLA_POLICY_ETH_ADDR_COMPAT,

        /* allow 3 for NUL-termination, we used to declare this NLA_STRING */
        [NL80211_ATTR_REG_ALPHA2] = NLA_POLICY_RANGE(NLA_BINARY, 2, 3),
        [NL80211_ATTR_REG_RULES] = { .type = NLA_NESTED },

        [NL80211_ATTR_BSS_CTS_PROT] = { .type = NLA_U8 },
        [NL80211_ATTR_BSS_SHORT_PREAMBLE] = { .type = NLA_U8 },
        [NL80211_ATTR_BSS_SHORT_SLOT_TIME] = { .type = NLA_U8 },
        [NL80211_ATTR_BSS_BASIC_RATES] = { .type = NLA_BINARY,
                                           .len = NL80211_MAX_SUPP_RATES },
        [NL80211_ATTR_BSS_HT_OPMODE] = { .type = NLA_U16 },

        [NL80211_ATTR_MESH_CONFIG] = { .type = NLA_NESTED },
        [NL80211_ATTR_SUPPORT_MESH_AUTH] = { .type = NLA_FLAG },

        [NL80211_ATTR_HT_CAPABILITY] = NLA_POLICY_EXACT_LEN_WARN(NL80211_HT_CAPABILITY_LEN),

        [NL80211_ATTR_MGMT_SUBTYPE] = { .type = NLA_U8 },
        [NL80211_ATTR_IE] = NLA_POLICY_VALIDATE_FN(NLA_BINARY,
                                                   validate_ie_attr,
                                                   IEEE80211_MAX_DATA_LEN),
        [NL80211_ATTR_SCAN_FREQUENCIES] = { .type = NLA_NESTED },
        [NL80211_ATTR_SCAN_SSIDS] = { .type = NLA_NESTED },

        [NL80211_ATTR_SSID] = { .type = NLA_BINARY,
                                .len = IEEE80211_MAX_SSID_LEN },
        [NL80211_ATTR_AUTH_TYPE] = { .type = NLA_U32 },
        [NL80211_ATTR_REASON_CODE] = { .type = NLA_U16 },
        [NL80211_ATTR_FREQ_FIXED] = { .type = NLA_FLAG },
        [NL80211_ATTR_TIMED_OUT] = { .type = NLA_FLAG },
        [NL80211_ATTR_USE_MFP] = NLA_POLICY_RANGE(NLA_U32,
                                                  NL80211_MFP_NO,
                                                  NL80211_MFP_OPTIONAL),
        [NL80211_ATTR_STA_FLAGS2] =
                NLA_POLICY_EXACT_LEN_WARN(sizeof(struct nl80211_sta_flag_update)),
        [NL80211_ATTR_CONTROL_PORT] = { .type = NLA_FLAG },
        [NL80211_ATTR_CONTROL_PORT_ETHERTYPE] = { .type = NLA_U16 },
        [NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT] = { .type = NLA_FLAG },
        [NL80211_ATTR_CONTROL_PORT_OVER_NL80211] = { .type = NLA_FLAG },
        [NL80211_ATTR_PRIVACY] = { .type = NLA_FLAG },
        [NL80211_ATTR_STATUS_CODE] = { .type = NLA_U16 },
        [NL80211_ATTR_CIPHER_SUITE_GROUP] = { .type = NLA_U32 },
        [NL80211_ATTR_WPA_VERSIONS] =
                NLA_POLICY_RANGE(NLA_U32, 0,
                                 NL80211_WPA_VERSION_1 |
                                 NL80211_WPA_VERSION_2 |
                                 NL80211_WPA_VERSION_3),
        [NL80211_ATTR_PID] = { .type = NLA_U32 },
        [NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
        [NL80211_ATTR_PMKID] = NLA_POLICY_EXACT_LEN_WARN(WLAN_PMKID_LEN),
        [NL80211_ATTR_DURATION] = { .type = NLA_U32 },
        [NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
        [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
        [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
                                 .len = IEEE80211_MAX_DATA_LEN },
        [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
        [NL80211_ATTR_PS_STATE] = NLA_POLICY_RANGE(NLA_U32,
                                                   NL80211_PS_DISABLED,
                                                   NL80211_PS_ENABLED),
        [NL80211_ATTR_CQM] = { .type = NLA_NESTED, },
        [NL80211_ATTR_LOCAL_STATE_CHANGE] = { .type = NLA_FLAG },
        [NL80211_ATTR_AP_ISOLATE] = { .type = NLA_U8 },
        [NL80211_ATTR_WIPHY_TX_POWER_SETTING] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_TX_POWER_LEVEL] = { .type = NLA_U32 },
        [NL80211_ATTR_FRAME_TYPE] = { .type = NLA_U16 },
        [NL80211_ATTR_WIPHY_ANTENNA_TX] = { .type = NLA_U32 },
        [NL80211_ATTR_WIPHY_ANTENNA_RX] = { .type = NLA_U32 },
        [NL80211_ATTR_MCAST_RATE] = { .type = NLA_U32 },
        [NL80211_ATTR_OFFCHANNEL_TX_OK] = { .type = NLA_FLAG },
        [NL80211_ATTR_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
        [NL80211_ATTR_WOWLAN_TRIGGERS] = { .type = NLA_NESTED },
        [NL80211_ATTR_STA_PLINK_STATE] =
                NLA_POLICY_MAX(NLA_U8, NUM_NL80211_PLINK_STATES - 1),
        [NL80211_ATTR_MEASUREMENT_DURATION] = { .type = NLA_U16 },
        [NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY] = { .type = NLA_FLAG },
        [NL80211_ATTR_MESH_PEER_AID] =
                NLA_POLICY_RANGE(NLA_U16, 1, IEEE80211_MAX_AID),
        [NL80211_ATTR_SCHED_SCAN_INTERVAL] = { .type = NLA_U32 },
        [NL80211_ATTR_REKEY_DATA] = { .type = NLA_NESTED },
        [NL80211_ATTR_SCAN_SUPP_RATES] = { .type = NLA_NESTED },
        [NL80211_ATTR_HIDDEN_SSID] =
                NLA_POLICY_RANGE(NLA_U32,
                                 NL80211_HIDDEN_SSID_NOT_IN_USE,
                                 NL80211_HIDDEN_SSID_ZERO_CONTENTS),
        [NL80211_ATTR_IE_PROBE_RESP] =
                NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_ie_attr,
                                       IEEE80211_MAX_DATA_LEN),
        [NL80211_ATTR_IE_ASSOC_RESP] =
                NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_ie_attr,
                                       IEEE80211_MAX_DATA_LEN),
        [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
        [NL80211_ATTR_STA_WME] = NLA_POLICY_NESTED(nl80211_sta_wme_policy),
        [NL80211_ATTR_SCHED_SCAN_MATCH] = { .type = NLA_NESTED },
        [NL80211_ATTR_TX_NO_CCK_RATE] = { .type = NLA_FLAG },
        [NL80211_ATTR_TDLS_ACTION] = { .type = NLA_U8 },
        [NL80211_ATTR_TDLS_DIALOG_TOKEN] = { .type = NLA_U8 },
        [NL80211_ATTR_TDLS_OPERATION] = { .type = NLA_U8 },
        [NL80211_ATTR_TDLS_SUPPORT] = { .type = NLA_FLAG },
        [NL80211_ATTR_TDLS_EXTERNAL_SETUP] = { .type = NLA_FLAG },
        [NL80211_ATTR_TDLS_INITIATOR] = { .type = NLA_FLAG },
        [NL80211_ATTR_DONT_WAIT_FOR_ACK] = { .type = NLA_FLAG },
        [NL80211_ATTR_PROBE_RESP] = { .type = NLA_BINARY,
                                      .len = IEEE80211_MAX_DATA_LEN },
        [NL80211_ATTR_DFS_REGION] = { .type = NLA_U8 },
        [NL80211_ATTR_DISABLE_HT] = { .type = NLA_FLAG },
        [NL80211_ATTR_HT_CAPABILITY_MASK] = {
                .len = NL80211_HT_CAPABILITY_LEN
        },
        [NL80211_ATTR_NOACK_MAP] = { .type = NLA_U16 },
        [NL80211_ATTR_INACTIVITY_TIMEOUT] = { .type = NLA_U16 },
        [NL80211_ATTR_BG_SCAN_PERIOD] = { .type = NLA_U16 },
        [NL80211_ATTR_WDEV] = { .type = NLA_U64 },
        [NL80211_ATTR_USER_REG_HINT_TYPE] = { .type = NLA_U32 },

        /* need to include at least Auth Transaction and Status Code */
        [NL80211_ATTR_AUTH_DATA] = NLA_POLICY_MIN_LEN(4),

        [NL80211_ATTR_VHT_CAPABILITY] = NLA_POLICY_EXACT_LEN_WARN(NL80211_VHT_CAPABILITY_LEN),
        [NL80211_ATTR_SCAN_FLAGS] = { .type = NLA_U32 },
        [NL80211_ATTR_P2P_CTWINDOW] = NLA_POLICY_MAX(NLA_U8, 127),
        [NL80211_ATTR_P2P_OPPPS] = NLA_POLICY_MAX(NLA_U8, 1),
        [NL80211_ATTR_LOCAL_MESH_POWER_MODE] =
                NLA_POLICY_RANGE(NLA_U32,
                                 NL80211_MESH_POWER_UNKNOWN + 1,
                                 NL80211_MESH_POWER_MAX),
        [NL80211_ATTR_ACL_POLICY] = {. type = NLA_U32 },
        [NL80211_ATTR_MAC_ADDRS] = { .type = NLA_NESTED },
        [NL80211_ATTR_STA_CAPABILITY] = { .type = NLA_U16 },
        [NL80211_ATTR_STA_EXT_CAPABILITY] = { .type = NLA_BINARY, },
        [NL80211_ATTR_SPLIT_WIPHY_DUMP] = { .type = NLA_FLAG, },
        [NL80211_ATTR_DISABLE_VHT] = { .type = NLA_FLAG },
        [NL80211_ATTR_VHT_CAPABILITY_MASK] = {
                .len = NL80211_VHT_CAPABILITY_LEN,
        },
        [NL80211_ATTR_MDID] = { .type = NLA_U16 },
        [NL80211_ATTR_IE_RIC] = { .type = NLA_BINARY,
                                  .len = IEEE80211_MAX_DATA_LEN },
        [NL80211_ATTR_CRIT_PROT_ID] = { .type = NLA_U16 },
        [NL80211_ATTR_MAX_CRIT_PROT_DURATION] =
                NLA_POLICY_MAX(NLA_U16, NL80211_CRIT_PROTO_MAX_DURATION),
        [NL80211_ATTR_PEER_AID] =
                NLA_POLICY_RANGE(NLA_U16, 1, IEEE80211_MAX_AID),
        [NL80211_ATTR_CH_SWITCH_COUNT] = { .type = NLA_U32 },
        [NL80211_ATTR_CH_SWITCH_BLOCK_TX] = { .type = NLA_FLAG },
        [NL80211_ATTR_CSA_IES] = { .type = NLA_NESTED },
        [NL80211_ATTR_CNTDWN_OFFS_BEACON] = { .type = NLA_BINARY },
        [NL80211_ATTR_CNTDWN_OFFS_PRESP] = { .type = NLA_BINARY },
        [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = NLA_POLICY_MIN_LEN(2),
        /*
         * The value of the Length field of the Supported Operating
         * Classes element is between 2 and 253.
         */
        [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] =
                NLA_POLICY_RANGE(NLA_BINARY, 2, 253),
        [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
        [NL80211_ATTR_OPMODE_NOTIF] = { .type = NLA_U8 },
        [NL80211_ATTR_VENDOR_ID] = { .type = NLA_U32 },
        [NL80211_ATTR_VENDOR_SUBCMD] = { .type = NLA_U32 },
        [NL80211_ATTR_VENDOR_DATA] = { .type = NLA_BINARY },
        [NL80211_ATTR_QOS_MAP] = NLA_POLICY_RANGE(NLA_BINARY,
                                                  IEEE80211_QOS_MAP_LEN_MIN,
                                                  IEEE80211_QOS_MAP_LEN_MAX),
        [NL80211_ATTR_MAC_HINT] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },
        [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
        [NL80211_ATTR_SOCKET_OWNER] = { .type = NLA_FLAG },
        [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
        [NL80211_ATTR_USE_RRM] = { .type = NLA_FLAG },
        [NL80211_ATTR_TSID] = NLA_POLICY_MAX(NLA_U8, IEEE80211_NUM_TIDS - 1),
        [NL80211_ATTR_USER_PRIO] =
                NLA_POLICY_MAX(NLA_U8, IEEE80211_NUM_UPS - 1),
        [NL80211_ATTR_ADMITTED_TIME] = { .type = NLA_U16 },
        [NL80211_ATTR_SMPS_MODE] = { .type = NLA_U8 },
        [NL80211_ATTR_OPER_CLASS] = { .type = NLA_U8 },
        [NL80211_ATTR_MAC_MASK] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_ATTR_WIPHY_SELF_MANAGED_REG] = { .type = NLA_FLAG },
        [NL80211_ATTR_NETNS_FD] = { .type = NLA_U32 },
        [NL80211_ATTR_SCHED_SCAN_DELAY] = { .type = NLA_U32 },
        [NL80211_ATTR_REG_INDOOR] = { .type = NLA_FLAG },
        [NL80211_ATTR_PBSS] = { .type = NLA_FLAG },
        [NL80211_ATTR_BSS_SELECT] = { .type = NLA_NESTED },
        [NL80211_ATTR_STA_SUPPORT_P2P_PS] =
                NLA_POLICY_MAX(NLA_U8, NUM_NL80211_P2P_PS_STATUS - 1),
        [NL80211_ATTR_MU_MIMO_GROUP_DATA] = {
                .len = VHT_MUMIMO_GROUPS_DATA_LEN
        },
        [NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_ATTR_NAN_MASTER_PREF] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_ATTR_BANDS] = { .type = NLA_U32 },
        [NL80211_ATTR_NAN_FUNC] = { .type = NLA_NESTED },
        [NL80211_ATTR_FILS_KEK] = { .type = NLA_BINARY,
                                    .len = FILS_MAX_KEK_LEN },
        [NL80211_ATTR_FILS_NONCES] = NLA_POLICY_EXACT_LEN_WARN(2 * FILS_NONCE_LEN),
        [NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED] = { .type = NLA_FLAG, },
        [NL80211_ATTR_BSSID] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] = { .type = NLA_S8 },
        [NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST] = {
                .len = sizeof(struct nl80211_bss_select_rssi_adjust)
        },
        [NL80211_ATTR_TIMEOUT_REASON] = { .type = NLA_U32 },
        [NL80211_ATTR_FILS_ERP_USERNAME] = { .type = NLA_BINARY,
                                             .len = FILS_ERP_MAX_USERNAME_LEN },
        [NL80211_ATTR_FILS_ERP_REALM] = { .type = NLA_BINARY,
                                          .len = FILS_ERP_MAX_REALM_LEN },
        [NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] = { .type = NLA_U16 },
        [NL80211_ATTR_FILS_ERP_RRK] = { .type = NLA_BINARY,
                                        .len = FILS_ERP_MAX_RRK_LEN },
        [NL80211_ATTR_FILS_CACHE_ID] = NLA_POLICY_EXACT_LEN_WARN(2),
        [NL80211_ATTR_PMK] = { .type = NLA_BINARY, .len = PMK_MAX_LEN },
        [NL80211_ATTR_PMKR0_NAME] = NLA_POLICY_EXACT_LEN(WLAN_PMK_NAME_LEN),
        [NL80211_ATTR_SCHED_SCAN_MULTI] = { .type = NLA_FLAG },
        [NL80211_ATTR_EXTERNAL_AUTH_SUPPORT] = { .type = NLA_FLAG },

        [NL80211_ATTR_TXQ_LIMIT] = { .type = NLA_U32 },
        [NL80211_ATTR_TXQ_MEMORY_LIMIT] = { .type = NLA_U32 },
        [NL80211_ATTR_TXQ_QUANTUM] = NLA_POLICY_FULL_RANGE(NLA_U32, &q_range),
        [NL80211_ATTR_HE_CAPABILITY] =
                NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_he_capa,
                                       NL80211_HE_MAX_CAPABILITY_LEN),
        [NL80211_ATTR_FTM_RESPONDER] =
                NLA_POLICY_NESTED(nl80211_ftm_responder_policy),
        [NL80211_ATTR_TIMEOUT] = NLA_POLICY_MIN(NLA_U32, 1),
        [NL80211_ATTR_PEER_MEASUREMENTS] =
                NLA_POLICY_NESTED(nl80211_pmsr_attr_policy),
        [NL80211_ATTR_AIRTIME_WEIGHT] = NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_ATTR_SAE_PASSWORD] = { .type = NLA_BINARY,
                                        .len = SAE_PASSWORD_MAX_LEN },
        [NL80211_ATTR_TWT_RESPONDER] = { .type = NLA_FLAG },
        [NL80211_ATTR_HE_OBSS_PD] = NLA_POLICY_NESTED(he_obss_pd_policy),
        [NL80211_ATTR_VLAN_ID] = NLA_POLICY_RANGE(NLA_U16, 1, VLAN_N_VID - 2),
        [NL80211_ATTR_HE_BSS_COLOR] = NLA_POLICY_NESTED(he_bss_color_policy),
        [NL80211_ATTR_TID_CONFIG] =
                NLA_POLICY_NESTED_ARRAY(nl80211_tid_config_attr_policy),
        [NL80211_ATTR_CONTROL_PORT_NO_PREAUTH] = { .type = NLA_FLAG },
        [NL80211_ATTR_PMK_LIFETIME] = NLA_POLICY_MIN(NLA_U32, 1),
        [NL80211_ATTR_PMK_REAUTH_THRESHOLD] = NLA_POLICY_RANGE(NLA_U8, 1, 100),
        [NL80211_ATTR_RECEIVE_MULTICAST] = { .type = NLA_FLAG },
        [NL80211_ATTR_WIPHY_FREQ_OFFSET] = NLA_POLICY_RANGE(NLA_U32, 0, 999),
        [NL80211_ATTR_SCAN_FREQ_KHZ] = { .type = NLA_NESTED },
        [NL80211_ATTR_HE_6GHZ_CAPABILITY] =
                NLA_POLICY_EXACT_LEN(sizeof(struct ieee80211_he_6ghz_capa)),
        [NL80211_ATTR_FILS_DISCOVERY] =
                NLA_POLICY_NESTED(nl80211_fils_discovery_policy),
        [NL80211_ATTR_UNSOL_BCAST_PROBE_RESP] =
                NLA_POLICY_NESTED(nl80211_unsol_bcast_probe_resp_policy),
        [NL80211_ATTR_S1G_CAPABILITY] =
                NLA_POLICY_EXACT_LEN(IEEE80211_S1G_CAPABILITY_LEN),
        [NL80211_ATTR_S1G_CAPABILITY_MASK] =
                NLA_POLICY_EXACT_LEN(IEEE80211_S1G_CAPABILITY_LEN),
        [NL80211_ATTR_SAE_PWE] =
                NLA_POLICY_RANGE(NLA_U8, NL80211_SAE_PWE_HUNT_AND_PECK,
                                 NL80211_SAE_PWE_BOTH),
        [NL80211_ATTR_RECONNECT_REQUESTED] = { .type = NLA_REJECT },
        [NL80211_ATTR_SAR_SPEC] = NLA_POLICY_NESTED(sar_policy),
        [NL80211_ATTR_DISABLE_HE] = { .type = NLA_FLAG },
        [NL80211_ATTR_OBSS_COLOR_BITMAP] = { .type = NLA_U64 },
        [NL80211_ATTR_COLOR_CHANGE_COUNT] = { .type = NLA_U8 },
        [NL80211_ATTR_COLOR_CHANGE_COLOR] = { .type = NLA_U8 },
        [NL80211_ATTR_COLOR_CHANGE_ELEMS] = NLA_POLICY_NESTED(nl80211_policy),
        [NL80211_ATTR_MBSSID_CONFIG] =
                        NLA_POLICY_NESTED(nl80211_mbssid_config_policy),
        [NL80211_ATTR_MBSSID_ELEMS] = { .type = NLA_NESTED },
        [NL80211_ATTR_RADAR_BACKGROUND] = { .type = NLA_FLAG },
        [NL80211_ATTR_AP_SETTINGS_FLAGS] = { .type = NLA_U32 },
        [NL80211_ATTR_EHT_CAPABILITY] =
                NLA_POLICY_RANGE(NLA_BINARY,
                                 NL80211_EHT_MIN_CAPABILITY_LEN,
                                 NL80211_EHT_MAX_CAPABILITY_LEN),
        [NL80211_ATTR_DISABLE_EHT] = { .type = NLA_FLAG },
        [NL80211_ATTR_MLO_LINKS] =
                NLA_POLICY_NESTED_ARRAY(nl80211_policy),
        [NL80211_ATTR_MLO_LINK_ID] =
                NLA_POLICY_RANGE(NLA_U8, 0, IEEE80211_MLD_MAX_NUM_LINKS),
        [NL80211_ATTR_MLD_ADDR] = NLA_POLICY_EXACT_LEN(ETH_ALEN),
        [NL80211_ATTR_MLO_SUPPORT] = { .type = NLA_FLAG },
        [NL80211_ATTR_MAX_NUM_AKM_SUITES] = { .type = NLA_REJECT },
        [NL80211_ATTR_PUNCT_BITMAP] =
                NLA_POLICY_FULL_RANGE(NLA_U32, &nl80211_punct_bitmap_range),

        [NL80211_ATTR_MAX_HW_TIMESTAMP_PEERS] = { .type = NLA_U16 },
        [NL80211_ATTR_HW_TIMESTAMP_ENABLED] = { .type = NLA_FLAG },
        [NL80211_ATTR_EMA_RNR_ELEMS] = { .type = NLA_NESTED },
        [NL80211_ATTR_MLO_LINK_DISABLED] = { .type = NLA_FLAG },
        [NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA] = { .type = NLA_FLAG },
        [NL80211_ATTR_MLO_TTLM_DLINK] = NLA_POLICY_EXACT_LEN(sizeof(u16) * 8),
        [NL80211_ATTR_MLO_TTLM_ULINK] = NLA_POLICY_EXACT_LEN(sizeof(u16) * 8),
        [NL80211_ATTR_ASSOC_SPP_AMSDU] = { .type = NLA_FLAG },
};

/* policy for the key attributes */
static const struct nla_policy nl80211_key_policy[NL80211_KEY_MAX + 1] = {
        [NL80211_KEY_DATA] = { .type = NLA_BINARY, .len = WLAN_MAX_KEY_LEN },
        [NL80211_KEY_IDX] = { .type = NLA_U8 },
        [NL80211_KEY_CIPHER] = { .type = NLA_U32 },
        [NL80211_KEY_SEQ] = { .type = NLA_BINARY, .len = 16 },
        [NL80211_KEY_DEFAULT] = { .type = NLA_FLAG },
        [NL80211_KEY_DEFAULT_MGMT] = { .type = NLA_FLAG },
        [NL80211_KEY_TYPE] = NLA_POLICY_MAX(NLA_U32, NUM_NL80211_KEYTYPES - 1),
        [NL80211_KEY_DEFAULT_TYPES] = { .type = NLA_NESTED },
        [NL80211_KEY_MODE] = NLA_POLICY_RANGE(NLA_U8, 0, NL80211_KEY_SET_TX),
};

/* policy for the key default flags */
static const struct nla_policy
nl80211_key_default_policy[NUM_NL80211_KEY_DEFAULT_TYPES] = {
        [NL80211_KEY_DEFAULT_TYPE_UNICAST] = { .type = NLA_FLAG },
        [NL80211_KEY_DEFAULT_TYPE_MULTICAST] = { .type = NLA_FLAG },
};

#ifdef CONFIG_PM
/* policy for WoWLAN attributes */
static const struct nla_policy
nl80211_wowlan_policy[NUM_NL80211_WOWLAN_TRIG] = {
        [NL80211_WOWLAN_TRIG_ANY] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_DISCONNECT] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_MAGIC_PKT] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_PKT_PATTERN] = { .type = NLA_NESTED },
        [NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_RFKILL_RELEASE] = { .type = NLA_FLAG },
        [NL80211_WOWLAN_TRIG_TCP_CONNECTION] = { .type = NLA_NESTED },
        [NL80211_WOWLAN_TRIG_NET_DETECT] = { .type = NLA_NESTED },
};

static const struct nla_policy
nl80211_wowlan_tcp_policy[NUM_NL80211_WOWLAN_TCP] = {
        [NL80211_WOWLAN_TCP_SRC_IPV4] = { .type = NLA_U32 },
        [NL80211_WOWLAN_TCP_DST_IPV4] = { .type = NLA_U32 },
        [NL80211_WOWLAN_TCP_DST_MAC] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_WOWLAN_TCP_SRC_PORT] = { .type = NLA_U16 },
        [NL80211_WOWLAN_TCP_DST_PORT] = { .type = NLA_U16 },
        [NL80211_WOWLAN_TCP_DATA_PAYLOAD] = NLA_POLICY_MIN_LEN(1),
        [NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ] = {
                .len = sizeof(struct nl80211_wowlan_tcp_data_seq)
        },
        [NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN] = {
                .len = sizeof(struct nl80211_wowlan_tcp_data_token)
        },
        [NL80211_WOWLAN_TCP_DATA_INTERVAL] = { .type = NLA_U32 },
        [NL80211_WOWLAN_TCP_WAKE_PAYLOAD] = NLA_POLICY_MIN_LEN(1),
        [NL80211_WOWLAN_TCP_WAKE_MASK] = NLA_POLICY_MIN_LEN(1),
};
#endif /* CONFIG_PM */

/* policy for coalesce rule attributes */
static const struct nla_policy
nl80211_coalesce_policy[NUM_NL80211_ATTR_COALESCE_RULE] = {
        [NL80211_ATTR_COALESCE_RULE_DELAY] = { .type = NLA_U32 },
        [NL80211_ATTR_COALESCE_RULE_CONDITION] =
                NLA_POLICY_RANGE(NLA_U32,
                                 NL80211_COALESCE_CONDITION_MATCH,
                                 NL80211_COALESCE_CONDITION_NO_MATCH),
        [NL80211_ATTR_COALESCE_RULE_PKT_PATTERN] = { .type = NLA_NESTED },
};

/* policy for GTK rekey offload attributes */
static const struct nla_policy
nl80211_rekey_policy[NUM_NL80211_REKEY_DATA] = {
        [NL80211_REKEY_DATA_KEK] = {
                .type = NLA_BINARY,
                .len = NL80211_KEK_EXT_LEN
        },
        [NL80211_REKEY_DATA_KCK] = {
                .type = NLA_BINARY,
                .len = NL80211_KCK_EXT_LEN_32
        },
        [NL80211_REKEY_DATA_REPLAY_CTR] = NLA_POLICY_EXACT_LEN(NL80211_REPLAY_CTR_LEN),
        [NL80211_REKEY_DATA_AKM] = { .type = NLA_U32 },
};

static const struct nla_policy
nl80211_match_policy[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1] = {
        [NL80211_SCHED_SCAN_MATCH_ATTR_SSID] = { .type = NLA_BINARY,
                                                 .len = IEEE80211_MAX_SSID_LEN },
        [NL80211_SCHED_SCAN_MATCH_ATTR_BSSID] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_SCHED_SCAN_MATCH_ATTR_RSSI] = { .type = NLA_U32 },
};

static const struct nla_policy
nl80211_plan_policy[NL80211_SCHED_SCAN_PLAN_MAX + 1] = {
        [NL80211_SCHED_SCAN_PLAN_INTERVAL] = { .type = NLA_U32 },
        [NL80211_SCHED_SCAN_PLAN_ITERATIONS] = { .type = NLA_U32 },
};

static const struct nla_policy
nl80211_bss_select_policy[NL80211_BSS_SELECT_ATTR_MAX + 1] = {
        [NL80211_BSS_SELECT_ATTR_RSSI] = { .type = NLA_FLAG },
        [NL80211_BSS_SELECT_ATTR_BAND_PREF] = { .type = NLA_U32 },
        [NL80211_BSS_SELECT_ATTR_RSSI_ADJUST] = {
                .len = sizeof(struct nl80211_bss_select_rssi_adjust)
        },
};

/* policy for NAN function attributes */
static const struct nla_policy
nl80211_nan_func_policy[NL80211_NAN_FUNC_ATTR_MAX + 1] = {
        [NL80211_NAN_FUNC_TYPE] =
                NLA_POLICY_MAX(NLA_U8, NL80211_NAN_FUNC_MAX_TYPE),
        [NL80211_NAN_FUNC_SERVICE_ID] = {
                                    .len = NL80211_NAN_FUNC_SERVICE_ID_LEN },
        [NL80211_NAN_FUNC_PUBLISH_TYPE] = { .type = NLA_U8 },
        [NL80211_NAN_FUNC_PUBLISH_BCAST] = { .type = NLA_FLAG },
        [NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE] = { .type = NLA_FLAG },
        [NL80211_NAN_FUNC_FOLLOW_UP_ID] = { .type = NLA_U8 },
        [NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] = { .type = NLA_U8 },
        [NL80211_NAN_FUNC_FOLLOW_UP_DEST] = NLA_POLICY_EXACT_LEN_WARN(ETH_ALEN),
        [NL80211_NAN_FUNC_CLOSE_RANGE] = { .type = NLA_FLAG },
        [NL80211_NAN_FUNC_TTL] = { .type = NLA_U32 },
        [NL80211_NAN_FUNC_SERVICE_INFO] = { .type = NLA_BINARY,
                        .len = NL80211_NAN_FUNC_SERVICE_SPEC_INFO_MAX_LEN },
        [NL80211_NAN_FUNC_SRF] = { .type = NLA_NESTED },
        [NL80211_NAN_FUNC_RX_MATCH_FILTER] = { .type = NLA_NESTED },
        [NL80211_NAN_FUNC_TX_MATCH_FILTER] = { .type = NLA_NESTED },
        [NL80211_NAN_FUNC_INSTANCE_ID] = { .type = NLA_U8 },
        [NL80211_NAN_FUNC_TERM_REASON] = { .type = NLA_U8 },
};

/* policy for Service Response Filter attributes */
static const struct nla_policy
nl80211_nan_srf_policy[NL80211_NAN_SRF_ATTR_MAX + 1] = {
        [NL80211_NAN_SRF_INCLUDE] = { .type = NLA_FLAG },
        [NL80211_NAN_SRF_BF] = { .type = NLA_BINARY,
                                 .len =  NL80211_NAN_FUNC_SRF_MAX_LEN },
        [NL80211_NAN_SRF_BF_IDX] = { .type = NLA_U8 },
        [NL80211_NAN_SRF_MAC_ADDRS] = { .type = NLA_NESTED },
};

/* policy for packet pattern attributes */
static const struct nla_policy
nl80211_packet_pattern_policy[MAX_NL80211_PKTPAT + 1] = {
        [NL80211_PKTPAT_MASK] = { .type = NLA_BINARY, },
        [NL80211_PKTPAT_PATTERN] = { .type = NLA_BINARY, },
        [NL80211_PKTPAT_OFFSET] = { .type = NLA_U32 },
};

static int nl80211_prepare_wdev_dump(struct netlink_callback *cb,
                                     struct cfg80211_registered_device **rdev,
                                     struct wireless_dev **wdev,
                                     struct nlattr **attrbuf)
{
        int err;

        if (!cb->args[0]) {
                struct nlattr **attrbuf_free = NULL;

                if (!attrbuf) {
                        attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf),
                                          GFP_KERNEL);
                        if (!attrbuf)
                                return -ENOMEM;
                        attrbuf_free = attrbuf;
                }

                err = nlmsg_parse_deprecated(cb->nlh,
                                             GENL_HDRLEN + nl80211_fam.hdrsize,
                                             attrbuf, nl80211_fam.maxattr,
                                             nl80211_policy, NULL);
                if (err) {
                        kfree(attrbuf_free);
                        return err;
                }

                rtnl_lock();
                *wdev = __cfg80211_wdev_from_attrs(NULL, sock_net(cb->skb->sk),
                                                   attrbuf);
                kfree(attrbuf_free);
                if (IS_ERR(*wdev)) {
                        rtnl_unlock();
                        return PTR_ERR(*wdev);
                }
                *rdev = wiphy_to_rdev((*wdev)->wiphy);
                mutex_lock(&(*rdev)->wiphy.mtx);
                rtnl_unlock();
                /* 0 is the first index - add 1 to parse only once */
                cb->args[0] = (*rdev)->wiphy_idx + 1;
                cb->args[1] = (*wdev)->identifier;
        } else {
                /* subtract the 1 again here */
                struct wiphy *wiphy;
                struct wireless_dev *tmp;

                rtnl_lock();
                wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
                if (!wiphy) {
                        rtnl_unlock();
                        return -ENODEV;
                }
                *rdev = wiphy_to_rdev(wiphy);
                *wdev = NULL;

                list_for_each_entry(tmp, &(*rdev)->wiphy.wdev_list, list) {
                        if (tmp->identifier == cb->args[1]) {
                                *wdev = tmp;
                                break;
                        }
                }

                if (!*wdev) {
                        rtnl_unlock();
                        return -ENODEV;
                }
                mutex_lock(&(*rdev)->wiphy.mtx);
                rtnl_unlock();
        }

        return 0;
}

/* message building helper */
void *nl80211hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
                     int flags, u8 cmd)
{
        /* since there is no private header just add the generic one */
        return genlmsg_put(skb, portid, seq, &nl80211_fam, flags, cmd);
}

static int nl80211_msg_put_wmm_rules(struct sk_buff *msg,
                                     const struct ieee80211_reg_rule *rule)
{
        int j;
        struct nlattr *nl_wmm_rules =
                nla_nest_start_noflag(msg, NL80211_FREQUENCY_ATTR_WMM);

        if (!nl_wmm_rules)
                goto nla_put_failure;

        for (j = 0; j < IEEE80211_NUM_ACS; j++) {
                struct nlattr *nl_wmm_rule = nla_nest_start_noflag(msg, j);

                if (!nl_wmm_rule)
                        goto nla_put_failure;

                if (nla_put_u16(msg, NL80211_WMMR_CW_MIN,
                                rule->wmm_rule.client[j].cw_min) ||
                    nla_put_u16(msg, NL80211_WMMR_CW_MAX,
                                rule->wmm_rule.client[j].cw_max) ||
                    nla_put_u8(msg, NL80211_WMMR_AIFSN,
                               rule->wmm_rule.client[j].aifsn) ||
                    nla_put_u16(msg, NL80211_WMMR_TXOP,
                                rule->wmm_rule.client[j].cot))
                        goto nla_put_failure;

                nla_nest_end(msg, nl_wmm_rule);
        }
        nla_nest_end(msg, nl_wmm_rules);

        return 0;

nla_put_failure:
        return -ENOBUFS;
}

static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy,
                                   struct ieee80211_channel *chan,
                                   bool large)
{
        /* Some channels must be completely excluded from the
         * list to protect old user-space tools from breaking
         */
        if (!large && chan->flags &
            (IEEE80211_CHAN_NO_10MHZ | IEEE80211_CHAN_NO_20MHZ))
                return 0;
        if (!large && chan->freq_offset)
                return 0;

        if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_FREQ,
                        chan->center_freq))
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_OFFSET, chan->freq_offset))
                goto nla_put_failure;

        if ((chan->flags & IEEE80211_CHAN_PSD) &&
            nla_put_s8(msg, NL80211_FREQUENCY_ATTR_PSD, chan->psd))
                goto nla_put_failure;

        if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
            nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
                goto nla_put_failure;
        if (chan->flags & IEEE80211_CHAN_NO_IR) {
                if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_IR))
                        goto nla_put_failure;
                if (nla_put_flag(msg, __NL80211_FREQUENCY_ATTR_NO_IBSS))
                        goto nla_put_failure;
        }
        if (chan->flags & IEEE80211_CHAN_RADAR) {
                if (nla_put_flag(msg, NL80211_FREQUENCY_ATTR_RADAR))
                        goto nla_put_failure;
                if (large) {
                        u32 time;

                        time = elapsed_jiffies_msecs(chan->dfs_state_entered);

                        if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_STATE,
                                        chan->dfs_state))
                                goto nla_put_failure;
                        if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_DFS_TIME,
                                        time))
                                goto nla_put_failure;
                        if (nla_put_u32(msg,
                                        NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
                                        chan->dfs_cac_ms))
                                goto nla_put_failure;
                }
        }

        if (large) {
                if ((chan->flags & IEEE80211_CHAN_NO_HT40MINUS) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_MINUS))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_HT40PLUS) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HT40_PLUS))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_80MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_80MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_160MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_160MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_INDOOR_ONLY) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_INDOOR_ONLY))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_IR_CONCURRENT) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_IR_CONCURRENT))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_20MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_20MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_10MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_10MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_HE) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_HE))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_1MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_1MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_2MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_2MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_4MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_4MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_8MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_8MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_16MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_16MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_320MHZ) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_320MHZ))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_EHT) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_EHT))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_DFS_CONCURRENT) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DFS_CONCURRENT))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_6GHZ_VLP_CLIENT) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_6GHZ_VLP_CLIENT))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_NO_6GHZ_AFC_CLIENT))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_CAN_MONITOR) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_CAN_MONITOR))
                        goto nla_put_failure;
                if ((chan->flags & IEEE80211_CHAN_ALLOW_6GHZ_VLP_AP) &&
                    nla_put_flag(msg, NL80211_FREQUENCY_ATTR_ALLOW_6GHZ_VLP_AP))
                        goto nla_put_failure;
        }

        if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_MAX_TX_POWER,
                        DBM_TO_MBM(chan->max_power)))
                goto nla_put_failure;

        if (large) {
                const struct ieee80211_reg_rule *rule =
                        freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));

                if (!IS_ERR_OR_NULL(rule) && rule->has_wmm) {
                        if (nl80211_msg_put_wmm_rules(msg, rule))
                                goto nla_put_failure;
                }
        }

        return 0;

 nla_put_failure:
        return -ENOBUFS;
}

static bool nl80211_put_txq_stats(struct sk_buff *msg,
                                  struct cfg80211_txq_stats *txqstats,
                                  int attrtype)
{
        struct nlattr *txqattr;

#define PUT_TXQVAL_U32(attr, memb) do {                                          \
        if (txqstats->filled & BIT(NL80211_TXQ_STATS_ ## attr) &&          \
            nla_put_u32(msg, NL80211_TXQ_STATS_ ## attr, txqstats->memb)) \
                return false;                                                  \
        } while (0)

        txqattr = nla_nest_start_noflag(msg, attrtype);
        if (!txqattr)
                return false;

        PUT_TXQVAL_U32(BACKLOG_BYTES, backlog_bytes);
        PUT_TXQVAL_U32(BACKLOG_PACKETS, backlog_packets);
        PUT_TXQVAL_U32(FLOWS, flows);
        PUT_TXQVAL_U32(DROPS, drops);
        PUT_TXQVAL_U32(ECN_MARKS, ecn_marks);
        PUT_TXQVAL_U32(OVERLIMIT, overlimit);
        PUT_TXQVAL_U32(OVERMEMORY, overmemory);
        PUT_TXQVAL_U32(COLLISIONS, collisions);
        PUT_TXQVAL_U32(TX_BYTES, tx_bytes);
        PUT_TXQVAL_U32(TX_PACKETS, tx_packets);
        PUT_TXQVAL_U32(MAX_FLOWS, max_flows);
        nla_nest_end(msg, txqattr);

#undef PUT_TXQVAL_U32
        return true;
}

/* netlink command implementations */

/**
 * nl80211_link_id - return link ID
 * @attrs: attributes to look at
 *
 * Returns: the link ID or 0 if not given
 *
 * Note this function doesn't do any validation of the link
 * ID validity wrt. links that were actually added, so it must
 * be called only from ops with %NL80211_FLAG_MLO_VALID_LINK_ID
 * or if additional validation is done.
 */
static unsigned int nl80211_link_id(struct nlattr **attrs)
{
        struct nlattr *linkid = attrs[NL80211_ATTR_MLO_LINK_ID];

        if (!linkid)
                return 0;

        return nla_get_u8(linkid);
}

static int nl80211_link_id_or_invalid(struct nlattr **attrs)
{
        struct nlattr *linkid = attrs[NL80211_ATTR_MLO_LINK_ID];

        if (!linkid)
                return -1;

        return nla_get_u8(linkid);
}

struct key_parse {
        struct key_params p;
        int idx;
        int type;
        bool def, defmgmt, defbeacon;
        bool def_uni, def_multi;
};

static int nl80211_parse_key_new(struct genl_info *info, struct nlattr *key,
                                 struct key_parse *k)
{
        struct nlattr *tb[NL80211_KEY_MAX + 1];
        int err = nla_parse_nested_deprecated(tb, NL80211_KEY_MAX, key,
                                              nl80211_key_policy,
                                              info->extack);
        if (err)
                return err;

        k->def = !!tb[NL80211_KEY_DEFAULT];
        k->defmgmt = !!tb[NL80211_KEY_DEFAULT_MGMT];
        k->defbeacon = !!tb[NL80211_KEY_DEFAULT_BEACON];

        if (k->def) {
                k->def_uni = true;
                k->def_multi = true;
        }
        if (k->defmgmt || k->defbeacon)
                k->def_multi = true;

        if (tb[NL80211_KEY_IDX])
                k->idx = nla_get_u8(tb[NL80211_KEY_IDX]);

        if (tb[NL80211_KEY_DATA]) {
                k->p.key = nla_data(tb[NL80211_KEY_DATA]);
                k->p.key_len = nla_len(tb[NL80211_KEY_DATA]);
        }

        if (tb[NL80211_KEY_SEQ]) {
                k->p.seq = nla_data(tb[NL80211_KEY_SEQ]);
                k->p.seq_len = nla_len(tb[NL80211_KEY_SEQ]);
        }

        if (tb[NL80211_KEY_CIPHER])
                k->p.cipher = nla_get_u32(tb[NL80211_KEY_CIPHER]);

        if (tb[NL80211_KEY_TYPE])
                k->type = nla_get_u32(tb[NL80211_KEY_TYPE]);

        if (tb[NL80211_KEY_DEFAULT_TYPES]) {
                struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];

                err = nla_parse_nested_deprecated(kdt,
                                                  NUM_NL80211_KEY_DEFAULT_TYPES - 1,
                                                  tb[NL80211_KEY_DEFAULT_TYPES],
                                                  nl80211_key_default_policy,
                                                  info->extack);
                if (err)
                        return err;

                k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
                k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
        }

        if (tb[NL80211_KEY_MODE])
                k->p.mode = nla_get_u8(tb[NL80211_KEY_MODE]);

        return 0;
}

static int nl80211_parse_key_old(struct genl_info *info, struct key_parse *k)
{
        if (info->attrs[NL80211_ATTR_KEY_DATA]) {
                k->p.key = nla_data(info->attrs[NL80211_ATTR_KEY_DATA]);
                k->p.key_len = nla_len(info->attrs[NL80211_ATTR_KEY_DATA]);
        }

        if (info->attrs[NL80211_ATTR_KEY_SEQ]) {
                k->p.seq = nla_data(info->attrs[NL80211_ATTR_KEY_SEQ]);
                k->p.seq_len = nla_len(info->attrs[NL80211_ATTR_KEY_SEQ]);
        }

        if (info->attrs[NL80211_ATTR_KEY_IDX])
                k->idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);

        if (info->attrs[NL80211_ATTR_KEY_CIPHER])
                k->p.cipher = nla_get_u32(info->attrs[NL80211_ATTR_KEY_CIPHER]);

        k->def = !!info->attrs[NL80211_ATTR_KEY_DEFAULT];
        k->defmgmt = !!info->attrs[NL80211_ATTR_KEY_DEFAULT_MGMT];

        if (k->def) {
                k->def_uni = true;
                k->def_multi = true;
        }
        if (k->defmgmt)
                k->def_multi = true;

        if (info->attrs[NL80211_ATTR_KEY_TYPE])
                k->type = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);

        if (info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES]) {
                struct nlattr *kdt[NUM_NL80211_KEY_DEFAULT_TYPES];
                int err = nla_parse_nested_deprecated(kdt,
                                                      NUM_NL80211_KEY_DEFAULT_TYPES - 1,
                                                      info->attrs[NL80211_ATTR_KEY_DEFAULT_TYPES],
                                                      nl80211_key_default_policy,
                                                      info->extack);
                if (err)
                        return err;

                k->def_uni = kdt[NL80211_KEY_DEFAULT_TYPE_UNICAST];
                k->def_multi = kdt[NL80211_KEY_DEFAULT_TYPE_MULTICAST];
        }

        return 0;
}

static int nl80211_parse_key(struct genl_info *info, struct key_parse *k)
{
        int err;

        memset(k, 0, sizeof(*k));
        k->idx = -1;
        k->type = -1;

        if (info->attrs[NL80211_ATTR_KEY])
                err = nl80211_parse_key_new(info, info->attrs[NL80211_ATTR_KEY], k);
        else
                err = nl80211_parse_key_old(info, k);

        if (err)
                return err;

        if ((k->def ? 1 : 0) + (k->defmgmt ? 1 : 0) +
            (k->defbeacon ? 1 : 0) > 1) {
                GENL_SET_ERR_MSG(info,
                                 "key with multiple default flags is invalid");
                return -EINVAL;
        }

        if (k->defmgmt || k->defbeacon) {
                if (k->def_uni || !k->def_multi) {
                        GENL_SET_ERR_MSG(info,
                                         "defmgmt/defbeacon key must be mcast");
                        return -EINVAL;
                }
        }

        if (k->idx != -1) {
                if (k->defmgmt) {
                        if (k->idx < 4 || k->idx > 5) {
                                GENL_SET_ERR_MSG(info,
                                                 "defmgmt key idx not 4 or 5");
                                return -EINVAL;
                        }
                } else if (k->defbeacon) {
                        if (k->idx < 6 || k->idx > 7) {
                                GENL_SET_ERR_MSG(info,
                                                 "defbeacon key idx not 6 or 7");
                                return -EINVAL;
                        }
                } else if (k->def) {
                        if (k->idx < 0 || k->idx > 3) {
                                GENL_SET_ERR_MSG(info, "def key idx not 0-3");
                                return -EINVAL;
                        }
                } else {
                        if (k->idx < 0 || k->idx > 7) {
                                GENL_SET_ERR_MSG(info, "key idx not 0-7");
                                return -EINVAL;
                        }
                }
        }

        return 0;
}

static struct cfg80211_cached_keys *
nl80211_parse_connkeys(struct cfg80211_registered_device *rdev,
                       struct genl_info *info, bool *no_ht)
{
        struct nlattr *keys = info->attrs[NL80211_ATTR_KEYS];
        struct key_parse parse;
        struct nlattr *key;
        struct cfg80211_cached_keys *result;
        int rem, err, def = 0;
        bool have_key = false;

        nla_for_each_nested(key, keys, rem) {
                have_key = true;
                break;
        }

        if (!have_key)
                return NULL;

        result = kzalloc(sizeof(*result), GFP_KERNEL);
        if (!result)
                return ERR_PTR(-ENOMEM);

        result->def = -1;

        nla_for_each_nested(key, keys, rem) {
                memset(&parse, 0, sizeof(parse));
                parse.idx = -1;

                err = nl80211_parse_key_new(info, key, &parse);
                if (err)
                        goto error;
                err = -EINVAL;
                if (!parse.p.key)
                        goto error;
                if (parse.idx < 0 || parse.idx > 3) {
                        GENL_SET_ERR_MSG(info, "key index out of range [0-3]");
                        goto error;
                }
                if (parse.def) {
                        if (def) {
                                GENL_SET_ERR_MSG(info,
                                                 "only one key can be default");
                                goto error;
                        }
                        def = 1;
                        result->def = parse.idx;
                        if (!parse.def_uni || !parse.def_multi)
                                goto error;
                } else if (parse.defmgmt)
                        goto error;
                err = cfg80211_validate_key_settings(rdev, &parse.p,
                                                     parse.idx, false, NULL);
                if (err)
                        goto error;
                if (parse.p.cipher != WLAN_CIPHER_SUITE_WEP40 &&
                    parse.p.cipher != WLAN_CIPHER_SUITE_WEP104) {
                        GENL_SET_ERR_MSG(info, "connect key must be WEP");
                        err = -EINVAL;
                        goto error;
                }
                result->params[parse.idx].cipher = parse.p.cipher;
                result->params[parse.idx].key_len = parse.p.key_len;
                result->params[parse.idx].key = result->data[parse.idx];
                memcpy(result->data[parse.idx], parse.p.key, parse.p.key_len);

                /* must be WEP key if we got here */
                if (no_ht)
                        *no_ht = true;
        }

        if (result->def < 0) {
                err = -EINVAL;
                GENL_SET_ERR_MSG(info, "need a default/TX key");
                goto error;
        }

        return result;
 error:
        kfree(result);
        return ERR_PTR(err);
}

static int nl80211_key_allowed(struct wireless_dev *wdev)
{
        lockdep_assert_wiphy(wdev->wiphy);

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_P2P_GO:
        case NL80211_IFTYPE_MESH_POINT:
                break;
        case NL80211_IFTYPE_ADHOC:
                if (wdev->u.ibss.current_bss)
                        return 0;
                return -ENOLINK;
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                if (wdev->connected)
                        return 0;
                return -ENOLINK;
        case NL80211_IFTYPE_NAN:
                if (wiphy_ext_feature_isset(wdev->wiphy,
                                            NL80211_EXT_FEATURE_SECURE_NAN))
                        return 0;
                return -EINVAL;
        case NL80211_IFTYPE_UNSPECIFIED:
        case NL80211_IFTYPE_OCB:
        case NL80211_IFTYPE_MONITOR:
        case NL80211_IFTYPE_P2P_DEVICE:
        case NL80211_IFTYPE_WDS:
        case NUM_NL80211_IFTYPES:
                return -EINVAL;
        }

        return 0;
}

static struct ieee80211_channel *nl80211_get_valid_chan(struct wiphy *wiphy,
                                                        u32 freq)
{
        struct ieee80211_channel *chan;

        chan = ieee80211_get_channel_khz(wiphy, freq);
        if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
                return NULL;
        return chan;
}

static int nl80211_put_iftypes(struct sk_buff *msg, u32 attr, u16 ifmodes)
{
        struct nlattr *nl_modes = nla_nest_start_noflag(msg, attr);
        int i;

        if (!nl_modes)
                goto nla_put_failure;

        i = 0;
        while (ifmodes) {
                if ((ifmodes & 1) && nla_put_flag(msg, i))
                        goto nla_put_failure;
                ifmodes >>= 1;
                i++;
        }

        nla_nest_end(msg, nl_modes);
        return 0;

nla_put_failure:
        return -ENOBUFS;
}

static int nl80211_put_ifcomb_data(struct sk_buff *msg, bool large, int idx,
                                   const struct ieee80211_iface_combination *c,
                                   u16 nested)
{
        struct nlattr *nl_combi, *nl_limits;
        int i;

        nl_combi = nla_nest_start_noflag(msg, idx | nested);
        if (!nl_combi)
                goto nla_put_failure;

        nl_limits = nla_nest_start_noflag(msg, NL80211_IFACE_COMB_LIMITS |
                                               nested);
        if (!nl_limits)
                goto nla_put_failure;

        for (i = 0; i < c->n_limits; i++) {
                struct nlattr *nl_limit;

                nl_limit = nla_nest_start_noflag(msg, i + 1);
                if (!nl_limit)
                        goto nla_put_failure;
                if (nla_put_u32(msg, NL80211_IFACE_LIMIT_MAX, c->limits[i].max))
                        goto nla_put_failure;
                if (nl80211_put_iftypes(msg, NL80211_IFACE_LIMIT_TYPES,
                                        c->limits[i].types))
                        goto nla_put_failure;
                nla_nest_end(msg, nl_limit);
        }

        nla_nest_end(msg, nl_limits);

        if (c->beacon_int_infra_match &&
            nla_put_flag(msg, NL80211_IFACE_COMB_STA_AP_BI_MATCH))
                goto nla_put_failure;
        if (nla_put_u32(msg, NL80211_IFACE_COMB_NUM_CHANNELS,
                        c->num_different_channels) ||
            nla_put_u32(msg, NL80211_IFACE_COMB_MAXNUM,
                        c->max_interfaces))
                goto nla_put_failure;
        if (large &&
            (nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_WIDTHS,
                        c->radar_detect_widths) ||
             nla_put_u32(msg, NL80211_IFACE_COMB_RADAR_DETECT_REGIONS,
                        c->radar_detect_regions)))
                goto nla_put_failure;
        if (c->beacon_int_min_gcd &&
            nla_put_u32(msg, NL80211_IFACE_COMB_BI_MIN_GCD,
                        c->beacon_int_min_gcd))
                goto nla_put_failure;

        nla_nest_end(msg, nl_combi);

        return 0;
nla_put_failure:
        return -ENOBUFS;
}

static int nl80211_put_iface_combinations(struct wiphy *wiphy,
                                          struct sk_buff *msg,
                                          int attr, int radio,
                                          bool large, u16 nested)
{
        const struct ieee80211_iface_combination *c;
        struct nlattr *nl_combis;
        int i, n;

        nl_combis = nla_nest_start_noflag(msg, attr | nested);
        if (!nl_combis)
                goto nla_put_failure;

        if (radio >= 0) {
                c = wiphy->radio[0].iface_combinations;
                n = wiphy->radio[0].n_iface_combinations;
        } else {
                c = wiphy->iface_combinations;
                n = wiphy->n_iface_combinations;
        }
        for (i = 0; i < n; i++)
                if (nl80211_put_ifcomb_data(msg, large, i + 1, &c[i], nested))
                        goto nla_put_failure;

        nla_nest_end(msg, nl_combis);

        return 0;
nla_put_failure:
        return -ENOBUFS;
}

#ifdef CONFIG_PM
static int nl80211_send_wowlan_tcp_caps(struct cfg80211_registered_device *rdev,
                                        struct sk_buff *msg)
{
        const struct wiphy_wowlan_tcp_support *tcp = rdev->wiphy.wowlan->tcp;
        struct nlattr *nl_tcp;

        if (!tcp)
                return 0;

        nl_tcp = nla_nest_start_noflag(msg,
                                       NL80211_WOWLAN_TRIG_TCP_CONNECTION);
        if (!nl_tcp)
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
                        tcp->data_payload_max))
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
                        tcp->data_payload_max))
                return -ENOBUFS;

        if (tcp->seq && nla_put_flag(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ))
                return -ENOBUFS;

        if (tcp->tok && nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
                                sizeof(*tcp->tok), tcp->tok))
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
                        tcp->data_interval_max))
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
                        tcp->wake_payload_max))
                return -ENOBUFS;

        nla_nest_end(msg, nl_tcp);
        return 0;
}

static int nl80211_send_wowlan(struct sk_buff *msg,
                               struct cfg80211_registered_device *rdev,
                               bool large)
{
        struct nlattr *nl_wowlan;

        if (!rdev->wiphy.wowlan)
                return 0;

        nl_wowlan = nla_nest_start_noflag(msg,
                                          NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
        if (!nl_wowlan)
                return -ENOBUFS;

        if (((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_ANY) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_DISCONNECT) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
            ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE) &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
                return -ENOBUFS;

        if (rdev->wiphy.wowlan->n_patterns) {
                struct nl80211_pattern_support pat = {
                        .max_patterns = rdev->wiphy.wowlan->n_patterns,
                        .min_pattern_len = rdev->wiphy.wowlan->pattern_min_len,
                        .max_pattern_len = rdev->wiphy.wowlan->pattern_max_len,
                        .max_pkt_offset = rdev->wiphy.wowlan->max_pkt_offset,
                };

                if (nla_put(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
                            sizeof(pat), &pat))
                        return -ENOBUFS;
        }

        if ((rdev->wiphy.wowlan->flags & WIPHY_WOWLAN_NET_DETECT) &&
            nla_put_u32(msg, NL80211_WOWLAN_TRIG_NET_DETECT,
                        rdev->wiphy.wowlan->max_nd_match_sets))
                return -ENOBUFS;

        if (large && nl80211_send_wowlan_tcp_caps(rdev, msg))
                return -ENOBUFS;

        nla_nest_end(msg, nl_wowlan);

        return 0;
}
#endif

static int nl80211_send_coalesce(struct sk_buff *msg,
                                 struct cfg80211_registered_device *rdev)
{
        struct nl80211_coalesce_rule_support rule;

        if (!rdev->wiphy.coalesce)
                return 0;

        rule.max_rules = rdev->wiphy.coalesce->n_rules;
        rule.max_delay = rdev->wiphy.coalesce->max_delay;
        rule.pat.max_patterns = rdev->wiphy.coalesce->n_patterns;
        rule.pat.min_pattern_len = rdev->wiphy.coalesce->pattern_min_len;
        rule.pat.max_pattern_len = rdev->wiphy.coalesce->pattern_max_len;
        rule.pat.max_pkt_offset = rdev->wiphy.coalesce->max_pkt_offset;

        if (nla_put(msg, NL80211_ATTR_COALESCE_RULE, sizeof(rule), &rule))
                return -ENOBUFS;

        return 0;
}

static int
nl80211_send_iftype_data(struct sk_buff *msg,
                         const struct ieee80211_supported_band *sband,
                         const struct ieee80211_sband_iftype_data *iftdata)
{
        const struct ieee80211_sta_he_cap *he_cap = &iftdata->he_cap;
        const struct ieee80211_sta_eht_cap *eht_cap = &iftdata->eht_cap;

        if (nl80211_put_iftypes(msg, NL80211_BAND_IFTYPE_ATTR_IFTYPES,
                                iftdata->types_mask))
                return -ENOBUFS;

        if (he_cap->has_he) {
                if (nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_CAP_MAC,
                            sizeof(he_cap->he_cap_elem.mac_cap_info),
                            he_cap->he_cap_elem.mac_cap_info) ||
                    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_CAP_PHY,
                            sizeof(he_cap->he_cap_elem.phy_cap_info),
                            he_cap->he_cap_elem.phy_cap_info) ||
                    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_CAP_MCS_SET,
                            sizeof(he_cap->he_mcs_nss_supp),
                            &he_cap->he_mcs_nss_supp) ||
                    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_CAP_PPE,
                            sizeof(he_cap->ppe_thres), he_cap->ppe_thres))
                        return -ENOBUFS;
        }

        if (eht_cap->has_eht && he_cap->has_he) {
                u8 mcs_nss_size, ppe_thresh_size;
                u16 ppe_thres_hdr;
                bool is_ap;

                is_ap = iftdata->types_mask & BIT(NL80211_IFTYPE_AP) ||
                        iftdata->types_mask & BIT(NL80211_IFTYPE_P2P_GO);

                mcs_nss_size =
                        ieee80211_eht_mcs_nss_size(&he_cap->he_cap_elem,
                                                   &eht_cap->eht_cap_elem,
                                                   is_ap);

                ppe_thres_hdr = get_unaligned_le16(&eht_cap->eht_ppe_thres[0]);
                ppe_thresh_size =
                        ieee80211_eht_ppe_size(ppe_thres_hdr,
                                               eht_cap->eht_cap_elem.phy_cap_info);

                if (nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MAC,
                            sizeof(eht_cap->eht_cap_elem.mac_cap_info),
                            eht_cap->eht_cap_elem.mac_cap_info) ||
                    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PHY,
                            sizeof(eht_cap->eht_cap_elem.phy_cap_info),
                            eht_cap->eht_cap_elem.phy_cap_info) ||
                    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_MCS_SET,
                            mcs_nss_size, &eht_cap->eht_mcs_nss_supp) ||
                    nla_put(msg, NL80211_BAND_IFTYPE_ATTR_EHT_CAP_PPE,
                            ppe_thresh_size, eht_cap->eht_ppe_thres))
                        return -ENOBUFS;
        }

        if (sband->band == NL80211_BAND_6GHZ &&
            nla_put(msg, NL80211_BAND_IFTYPE_ATTR_HE_6GHZ_CAPA,
                    sizeof(iftdata->he_6ghz_capa),
                    &iftdata->he_6ghz_capa))
                return -ENOBUFS;

        if (iftdata->vendor_elems.data && iftdata->vendor_elems.len &&
            nla_put(msg, NL80211_BAND_IFTYPE_ATTR_VENDOR_ELEMS,
                    iftdata->vendor_elems.len, iftdata->vendor_elems.data))
                return -ENOBUFS;

        return 0;
}

static int nl80211_send_band_rateinfo(struct sk_buff *msg,
                                      struct ieee80211_supported_band *sband,
                                      bool large)
{
        struct nlattr *nl_rates, *nl_rate;
        struct ieee80211_rate *rate;
        int i;

        /* add HT info */
        if (sband->ht_cap.ht_supported &&
            (nla_put(msg, NL80211_BAND_ATTR_HT_MCS_SET,
                     sizeof(sband->ht_cap.mcs),
                     &sband->ht_cap.mcs) ||
             nla_put_u16(msg, NL80211_BAND_ATTR_HT_CAPA,
                         sband->ht_cap.cap) ||
             nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
                        sband->ht_cap.ampdu_factor) ||
             nla_put_u8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
                        sband->ht_cap.ampdu_density)))
                return -ENOBUFS;

        /* add VHT info */
        if (sband->vht_cap.vht_supported &&
            (nla_put(msg, NL80211_BAND_ATTR_VHT_MCS_SET,
                     sizeof(sband->vht_cap.vht_mcs),
                     &sband->vht_cap.vht_mcs) ||
             nla_put_u32(msg, NL80211_BAND_ATTR_VHT_CAPA,
                         sband->vht_cap.cap)))
                return -ENOBUFS;

        if (large && sband->n_iftype_data) {
                struct nlattr *nl_iftype_data =
                        nla_nest_start_noflag(msg,
                                              NL80211_BAND_ATTR_IFTYPE_DATA);
                const struct ieee80211_sband_iftype_data *iftd;
                int err;

                if (!nl_iftype_data)
                        return -ENOBUFS;

                for_each_sband_iftype_data(sband, i, iftd) {
                        struct nlattr *iftdata;

                        iftdata = nla_nest_start_noflag(msg, i + 1);
                        if (!iftdata)
                                return -ENOBUFS;

                        err = nl80211_send_iftype_data(msg, sband, iftd);
                        if (err)
                                return err;

                        nla_nest_end(msg, iftdata);
                }

                nla_nest_end(msg, nl_iftype_data);
        }

        /* add EDMG info */
        if (large && sband->edmg_cap.channels &&
            (nla_put_u8(msg, NL80211_BAND_ATTR_EDMG_CHANNELS,
                       sband->edmg_cap.channels) ||
            nla_put_u8(msg, NL80211_BAND_ATTR_EDMG_BW_CONFIG,
                       sband->edmg_cap.bw_config)))

                return -ENOBUFS;

        /* add bitrates */
        nl_rates = nla_nest_start_noflag(msg, NL80211_BAND_ATTR_RATES);
        if (!nl_rates)
                return -ENOBUFS;

        for (i = 0; i < sband->n_bitrates; i++) {
                nl_rate = nla_nest_start_noflag(msg, i);
                if (!nl_rate)
                        return -ENOBUFS;

                rate = &sband->bitrates[i];
                if (nla_put_u32(msg, NL80211_BITRATE_ATTR_RATE,
                                rate->bitrate))
                        return -ENOBUFS;
                if ((rate->flags & IEEE80211_RATE_SHORT_PREAMBLE) &&
                    nla_put_flag(msg,
                                 NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE))
                        return -ENOBUFS;

                nla_nest_end(msg, nl_rate);
        }

        nla_nest_end(msg, nl_rates);

        /* S1G capabilities */
        if (sband->band == NL80211_BAND_S1GHZ && sband->s1g_cap.s1g &&
            (nla_put(msg, NL80211_BAND_ATTR_S1G_CAPA,
                     sizeof(sband->s1g_cap.cap),
                     sband->s1g_cap.cap) ||
             nla_put(msg, NL80211_BAND_ATTR_S1G_MCS_NSS_SET,
                     sizeof(sband->s1g_cap.nss_mcs),
                     sband->s1g_cap.nss_mcs)))
                return -ENOBUFS;

        return 0;
}

static int
nl80211_send_mgmt_stypes(struct sk_buff *msg,
                         const struct ieee80211_txrx_stypes *mgmt_stypes)
{
        u16 stypes;
        struct nlattr *nl_ftypes, *nl_ifs;
        enum nl80211_iftype ift;
        int i;

        if (!mgmt_stypes)
                return 0;

        nl_ifs = nla_nest_start_noflag(msg, NL80211_ATTR_TX_FRAME_TYPES);
        if (!nl_ifs)
                return -ENOBUFS;

        for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
                nl_ftypes = nla_nest_start_noflag(msg, ift);
                if (!nl_ftypes)
                        return -ENOBUFS;
                i = 0;
                stypes = mgmt_stypes[ift].tx;
                while (stypes) {
                        if ((stypes & 1) &&
                            nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
                                        (i << 4) | IEEE80211_FTYPE_MGMT))
                                return -ENOBUFS;
                        stypes >>= 1;
                        i++;
                }
                nla_nest_end(msg, nl_ftypes);
        }

        nla_nest_end(msg, nl_ifs);

        nl_ifs = nla_nest_start_noflag(msg, NL80211_ATTR_RX_FRAME_TYPES);
        if (!nl_ifs)
                return -ENOBUFS;

        for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
                nl_ftypes = nla_nest_start_noflag(msg, ift);
                if (!nl_ftypes)
                        return -ENOBUFS;
                i = 0;
                stypes = mgmt_stypes[ift].rx;
                while (stypes) {
                        if ((stypes & 1) &&
                            nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE,
                                        (i << 4) | IEEE80211_FTYPE_MGMT))
                                return -ENOBUFS;
                        stypes >>= 1;
                        i++;
                }
                nla_nest_end(msg, nl_ftypes);
        }
        nla_nest_end(msg, nl_ifs);

        return 0;
}

#define CMD(op, n)                                                        \
         do {                                                                \
                if (rdev->ops->op) {                                        \
                        i++;                                                \
                        if (nla_put_u32(msg, i, NL80211_CMD_ ## n))         \
                                goto nla_put_failure;                        \
                }                                                        \
        } while (0)

static int nl80211_add_commands_unsplit(struct cfg80211_registered_device *rdev,
                                        struct sk_buff *msg)
{
        int i = 0;

        /*
         * do *NOT* add anything into this function, new things need to be
         * advertised only to new versions of userspace that can deal with
         * the split (and they can't possibly care about new features...
         */
        CMD(add_virtual_intf, NEW_INTERFACE);
        CMD(change_virtual_intf, SET_INTERFACE);
        CMD(add_key, NEW_KEY);
        CMD(start_ap, START_AP);
        CMD(add_station, NEW_STATION);
        CMD(add_mpath, NEW_MPATH);
        CMD(update_mesh_config, SET_MESH_CONFIG);
        CMD(change_bss, SET_BSS);
        CMD(auth, AUTHENTICATE);
        CMD(assoc, ASSOCIATE);
        CMD(deauth, DEAUTHENTICATE);
        CMD(disassoc, DISASSOCIATE);
        CMD(join_ibss, JOIN_IBSS);
        CMD(join_mesh, JOIN_MESH);
        CMD(set_pmksa, SET_PMKSA);
        CMD(del_pmksa, DEL_PMKSA);
        CMD(flush_pmksa, FLUSH_PMKSA);
        if (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL)
                CMD(remain_on_channel, REMAIN_ON_CHANNEL);
        CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
        CMD(mgmt_tx, FRAME);
        CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
        if (rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
                i++;
                if (nla_put_u32(msg, i, NL80211_CMD_SET_WIPHY_NETNS))
                        goto nla_put_failure;
        }
        if (rdev->ops->set_monitor_channel || rdev->ops->start_ap ||
            rdev->ops->join_mesh) {
                i++;
                if (nla_put_u32(msg, i, NL80211_CMD_SET_CHANNEL))
                        goto nla_put_failure;
        }
        if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) {
                CMD(tdls_mgmt, TDLS_MGMT);
                CMD(tdls_oper, TDLS_OPER);
        }
        if (rdev->wiphy.max_sched_scan_reqs)
                CMD(sched_scan_start, START_SCHED_SCAN);
        CMD(probe_client, PROBE_CLIENT);
        CMD(set_noack_map, SET_NOACK_MAP);
        if (rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS) {
                i++;
                if (nla_put_u32(msg, i, NL80211_CMD_REGISTER_BEACONS))
                        goto nla_put_failure;
        }
        CMD(start_p2p_device, START_P2P_DEVICE);
        CMD(set_mcast_rate, SET_MCAST_RATE);
#ifdef CONFIG_NL80211_TESTMODE
        CMD(testmode_cmd, TESTMODE);
#endif

        if (rdev->ops->connect || rdev->ops->auth) {
                i++;
                if (nla_put_u32(msg, i, NL80211_CMD_CONNECT))
                        goto nla_put_failure;
        }

        if (rdev->ops->disconnect || rdev->ops->deauth) {
                i++;
                if (nla_put_u32(msg, i, NL80211_CMD_DISCONNECT))
                        goto nla_put_failure;
        }

        return i;
 nla_put_failure:
        return -ENOBUFS;
}

static int
nl80211_send_pmsr_ftm_capa(const struct cfg80211_pmsr_capabilities *cap,
                           struct sk_buff *msg)
{
        struct nlattr *ftm;

        if (!cap->ftm.supported)
                return 0;

        ftm = nla_nest_start_noflag(msg, NL80211_PMSR_TYPE_FTM);
        if (!ftm)
                return -ENOBUFS;

        if (cap->ftm.asap && nla_put_flag(msg, NL80211_PMSR_FTM_CAPA_ATTR_ASAP))
                return -ENOBUFS;
        if (cap->ftm.non_asap &&
            nla_put_flag(msg, NL80211_PMSR_FTM_CAPA_ATTR_NON_ASAP))
                return -ENOBUFS;
        if (cap->ftm.request_lci &&
            nla_put_flag(msg, NL80211_PMSR_FTM_CAPA_ATTR_REQ_LCI))
                return -ENOBUFS;
        if (cap->ftm.request_civicloc &&
            nla_put_flag(msg, NL80211_PMSR_FTM_CAPA_ATTR_REQ_CIVICLOC))
                return -ENOBUFS;
        if (nla_put_u32(msg, NL80211_PMSR_FTM_CAPA_ATTR_PREAMBLES,
                        cap->ftm.preambles))
                return -ENOBUFS;
        if (nla_put_u32(msg, NL80211_PMSR_FTM_CAPA_ATTR_BANDWIDTHS,
                        cap->ftm.bandwidths))
                return -ENOBUFS;
        if (cap->ftm.max_bursts_exponent >= 0 &&
            nla_put_u32(msg, NL80211_PMSR_FTM_CAPA_ATTR_MAX_BURSTS_EXPONENT,
                        cap->ftm.max_bursts_exponent))
                return -ENOBUFS;
        if (cap->ftm.max_ftms_per_burst &&
            nla_put_u32(msg, NL80211_PMSR_FTM_CAPA_ATTR_MAX_FTMS_PER_BURST,
                        cap->ftm.max_ftms_per_burst))
                return -ENOBUFS;
        if (cap->ftm.trigger_based &&
            nla_put_flag(msg, NL80211_PMSR_FTM_CAPA_ATTR_TRIGGER_BASED))
                return -ENOBUFS;
        if (cap->ftm.non_trigger_based &&
            nla_put_flag(msg, NL80211_PMSR_FTM_CAPA_ATTR_NON_TRIGGER_BASED))
                return -ENOBUFS;

        nla_nest_end(msg, ftm);
        return 0;
}

static int nl80211_send_pmsr_capa(struct cfg80211_registered_device *rdev,
                                  struct sk_buff *msg)
{
        const struct cfg80211_pmsr_capabilities *cap = rdev->wiphy.pmsr_capa;
        struct nlattr *pmsr, *caps;

        if (!cap)
                return 0;

        /*
         * we don't need to clean up anything here since the caller
         * will genlmsg_cancel() if we fail
         */

        pmsr = nla_nest_start_noflag(msg, NL80211_ATTR_PEER_MEASUREMENTS);
        if (!pmsr)
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_PMSR_ATTR_MAX_PEERS, cap->max_peers))
                return -ENOBUFS;

        if (cap->report_ap_tsf &&
            nla_put_flag(msg, NL80211_PMSR_ATTR_REPORT_AP_TSF))
                return -ENOBUFS;

        if (cap->randomize_mac_addr &&
            nla_put_flag(msg, NL80211_PMSR_ATTR_RANDOMIZE_MAC_ADDR))
                return -ENOBUFS;

        caps = nla_nest_start_noflag(msg, NL80211_PMSR_ATTR_TYPE_CAPA);
        if (!caps)
                return -ENOBUFS;

        if (nl80211_send_pmsr_ftm_capa(cap, msg))
                return -ENOBUFS;

        nla_nest_end(msg, caps);
        nla_nest_end(msg, pmsr);

        return 0;
}

static int
nl80211_put_iftype_akm_suites(struct cfg80211_registered_device *rdev,
                              struct sk_buff *msg)
{
        int i;
        struct nlattr *nested, *nested_akms;
        const struct wiphy_iftype_akm_suites *iftype_akms;

        if (!rdev->wiphy.num_iftype_akm_suites ||
            !rdev->wiphy.iftype_akm_suites)
                return 0;

        nested = nla_nest_start(msg, NL80211_ATTR_IFTYPE_AKM_SUITES);
        if (!nested)
                return -ENOBUFS;

        for (i = 0; i < rdev->wiphy.num_iftype_akm_suites; i++) {
                nested_akms = nla_nest_start(msg, i + 1);
                if (!nested_akms)
                        return -ENOBUFS;

                iftype_akms = &rdev->wiphy.iftype_akm_suites[i];

                if (nl80211_put_iftypes(msg, NL80211_IFTYPE_AKM_ATTR_IFTYPES,
                                        iftype_akms->iftypes_mask))
                        return -ENOBUFS;

                if (nla_put(msg, NL80211_IFTYPE_AKM_ATTR_SUITES,
                            sizeof(u32) * iftype_akms->n_akm_suites,
                            iftype_akms->akm_suites)) {
                        return -ENOBUFS;
                }
                nla_nest_end(msg, nested_akms);
        }

        nla_nest_end(msg, nested);

        return 0;
}

static int
nl80211_put_tid_config_support(struct cfg80211_registered_device *rdev,
                               struct sk_buff *msg)
{
        struct nlattr *supp;

        if (!rdev->wiphy.tid_config_support.vif &&
            !rdev->wiphy.tid_config_support.peer)
                return 0;

        supp = nla_nest_start(msg, NL80211_ATTR_TID_CONFIG);
        if (!supp)
                return -ENOSPC;

        if (rdev->wiphy.tid_config_support.vif &&
            nla_put_u64_64bit(msg, NL80211_TID_CONFIG_ATTR_VIF_SUPP,
                              rdev->wiphy.tid_config_support.vif,
                              NL80211_TID_CONFIG_ATTR_PAD))
                goto fail;

        if (rdev->wiphy.tid_config_support.peer &&
            nla_put_u64_64bit(msg, NL80211_TID_CONFIG_ATTR_PEER_SUPP,
                              rdev->wiphy.tid_config_support.peer,
                              NL80211_TID_CONFIG_ATTR_PAD))
                goto fail;

        /* for now we just use the same value ... makes more sense */
        if (nla_put_u8(msg, NL80211_TID_CONFIG_ATTR_RETRY_SHORT,
                       rdev->wiphy.tid_config_support.max_retry))
                goto fail;
        if (nla_put_u8(msg, NL80211_TID_CONFIG_ATTR_RETRY_LONG,
                       rdev->wiphy.tid_config_support.max_retry))
                goto fail;

        nla_nest_end(msg, supp);

        return 0;
fail:
        nla_nest_cancel(msg, supp);
        return -ENOBUFS;
}

static int
nl80211_put_sar_specs(struct cfg80211_registered_device *rdev,
                      struct sk_buff *msg)
{
        struct nlattr *sar_capa, *specs, *sub_freq_range;
        u8 num_freq_ranges;
        int i;

        if (!rdev->wiphy.sar_capa)
                return 0;

        num_freq_ranges = rdev->wiphy.sar_capa->num_freq_ranges;

        sar_capa = nla_nest_start(msg, NL80211_ATTR_SAR_SPEC);
        if (!sar_capa)
                return -ENOSPC;

        if (nla_put_u32(msg, NL80211_SAR_ATTR_TYPE, rdev->wiphy.sar_capa->type))
                goto fail;

        specs = nla_nest_start(msg, NL80211_SAR_ATTR_SPECS);
        if (!specs)
                goto fail;

        /* report supported freq_ranges */
        for (i = 0; i < num_freq_ranges; i++) {
                sub_freq_range = nla_nest_start(msg, i + 1);
                if (!sub_freq_range)
                        goto fail;

                if (nla_put_u32(msg, NL80211_SAR_ATTR_SPECS_START_FREQ,
                                rdev->wiphy.sar_capa->freq_ranges[i].start_freq))
                        goto fail;

                if (nla_put_u32(msg, NL80211_SAR_ATTR_SPECS_END_FREQ,
                                rdev->wiphy.sar_capa->freq_ranges[i].end_freq))
                        goto fail;

                nla_nest_end(msg, sub_freq_range);
        }

        nla_nest_end(msg, specs);
        nla_nest_end(msg, sar_capa);

        return 0;
fail:
        nla_nest_cancel(msg, sar_capa);
        return -ENOBUFS;
}

static int nl80211_put_mbssid_support(struct wiphy *wiphy, struct sk_buff *msg)
{
        struct nlattr *config;

        if (!wiphy->mbssid_max_interfaces)
                return 0;

        config = nla_nest_start(msg, NL80211_ATTR_MBSSID_CONFIG);
        if (!config)
                return -ENOBUFS;

        if (nla_put_u8(msg, NL80211_MBSSID_CONFIG_ATTR_MAX_INTERFACES,
                       wiphy->mbssid_max_interfaces))
                goto fail;

        if (wiphy->ema_max_profile_periodicity &&
            nla_put_u8(msg,
                       NL80211_MBSSID_CONFIG_ATTR_MAX_EMA_PROFILE_PERIODICITY,
                       wiphy->ema_max_profile_periodicity))
                goto fail;

        nla_nest_end(msg, config);
        return 0;

fail:
        nla_nest_cancel(msg, config);
        return -ENOBUFS;
}

static int nl80211_put_radio(struct wiphy *wiphy, struct sk_buff *msg, int idx)
{
        const struct wiphy_radio *r = &wiphy->radio[idx];
        struct nlattr *radio, *freq;
        int i;

        radio = nla_nest_start(msg, idx);
        if (!radio)
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_WIPHY_RADIO_ATTR_INDEX, idx))
                goto nla_put_failure;

        for (i = 0; i < r->n_freq_range; i++) {
                const struct wiphy_radio_freq_range *range = &r->freq_range[i];

                freq = nla_nest_start(msg, NL80211_WIPHY_RADIO_ATTR_FREQ_RANGE);
                if (!freq)
                        goto nla_put_failure;

                if (nla_put_u32(msg, NL80211_WIPHY_RADIO_FREQ_ATTR_START,
                                range->start_freq) ||
                    nla_put_u32(msg, NL80211_WIPHY_RADIO_FREQ_ATTR_END,
                                range->end_freq))
                        goto nla_put_failure;

                nla_nest_end(msg, freq);
        }

        for (i = 0; i < r->n_iface_combinations; i++)
                if (nl80211_put_ifcomb_data(msg, true,
                                            NL80211_WIPHY_RADIO_ATTR_INTERFACE_COMBINATION,
                                            &r->iface_combinations[i],
                                            NLA_F_NESTED))
                        goto nla_put_failure;

        nla_nest_end(msg, radio);

        return 0;

nla_put_failure:
        return -ENOBUFS;
}

static int nl80211_put_radios(struct wiphy *wiphy, struct sk_buff *msg)
{
        struct nlattr *radios;
        int i;

        if (!wiphy->n_radio)
                return 0;

        radios = nla_nest_start(msg, NL80211_ATTR_WIPHY_RADIOS);
        if (!radios)
                return -ENOBUFS;

        for (i = 0; i < wiphy->n_radio; i++)
                if (nl80211_put_radio(wiphy, msg, i))
                        goto fail;

        nla_nest_end(msg, radios);

        if (nl80211_put_iface_combinations(wiphy, msg,
                                           NL80211_ATTR_WIPHY_INTERFACE_COMBINATIONS,
                                           -1, true, NLA_F_NESTED))
                return -ENOBUFS;

        return 0;

fail:
        nla_nest_cancel(msg, radios);
        return -ENOBUFS;
}

struct nl80211_dump_wiphy_state {
        s64 filter_wiphy;
        long start;
        long split_start, band_start, chan_start, capa_start;
        bool split;
};

static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
                              enum nl80211_commands cmd,
                              struct sk_buff *msg, u32 portid, u32 seq,
                              int flags, struct nl80211_dump_wiphy_state *state)
{
        void *hdr;
        struct nlattr *nl_bands, *nl_band;
        struct nlattr *nl_freqs, *nl_freq;
        struct nlattr *nl_cmds;
        enum nl80211_band band;
        struct ieee80211_channel *chan;
        int i;
        const struct ieee80211_txrx_stypes *mgmt_stypes =
                                rdev->wiphy.mgmt_stypes;
        u32 features;

        hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
        if (!hdr)
                return -ENOBUFS;

        if (WARN_ON(!state))
                return -EINVAL;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_string(msg, NL80211_ATTR_WIPHY_NAME,
                           wiphy_name(&rdev->wiphy)) ||
            nla_put_u32(msg, NL80211_ATTR_GENERATION,
                        cfg80211_rdev_list_generation))
                goto nla_put_failure;

        if (cmd != NL80211_CMD_NEW_WIPHY)
                goto finish;

        switch (state->split_start) {
        case 0:
                if (nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
                               rdev->wiphy.retry_short) ||
                    nla_put_u8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
                               rdev->wiphy.retry_long) ||
                    nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
                                rdev->wiphy.frag_threshold) ||
                    nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
                                rdev->wiphy.rts_threshold) ||
                    nla_put_u8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
                               rdev->wiphy.coverage_class) ||
                    nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
                               rdev->wiphy.max_scan_ssids) ||
                    nla_put_u8(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS,
                               rdev->wiphy.max_sched_scan_ssids) ||
                    nla_put_u16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
                                rdev->wiphy.max_scan_ie_len) ||
                    nla_put_u16(msg, NL80211_ATTR_MAX_SCHED_SCAN_IE_LEN,
                                rdev->wiphy.max_sched_scan_ie_len) ||
                    nla_put_u8(msg, NL80211_ATTR_MAX_MATCH_SETS,
                               rdev->wiphy.max_match_sets))
                        goto nla_put_failure;

                if ((rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN) &&
                    nla_put_flag(msg, NL80211_ATTR_SUPPORT_IBSS_RSN))
                        goto nla_put_failure;
                if ((rdev->wiphy.flags & WIPHY_FLAG_MESH_AUTH) &&
                    nla_put_flag(msg, NL80211_ATTR_SUPPORT_MESH_AUTH))
                        goto nla_put_failure;
                if ((rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) &&
                    nla_put_flag(msg, NL80211_ATTR_SUPPORT_AP_UAPSD))
                        goto nla_put_failure;
                if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
                    nla_put_flag(msg, NL80211_ATTR_ROAM_SUPPORT))
                        goto nla_put_failure;
                if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) &&
                    nla_put_flag(msg, NL80211_ATTR_TDLS_SUPPORT))
                        goto nla_put_failure;
                if ((rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP) &&
                    nla_put_flag(msg, NL80211_ATTR_TDLS_EXTERNAL_SETUP))
                        goto nla_put_failure;
                state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 1:
                if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
                            sizeof(u32) * rdev->wiphy.n_cipher_suites,
                            rdev->wiphy.cipher_suites))
                        goto nla_put_failure;

                if (nla_put_u8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
                               rdev->wiphy.max_num_pmkids))
                        goto nla_put_failure;

                if ((rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
                    nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE))
                        goto nla_put_failure;

                if (nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
                                rdev->wiphy.available_antennas_tx) ||
                    nla_put_u32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
                                rdev->wiphy.available_antennas_rx))
                        goto nla_put_failure;

                if ((rdev->wiphy.flags & WIPHY_FLAG_AP_PROBE_RESP_OFFLOAD) &&
                    nla_put_u32(msg, NL80211_ATTR_PROBE_RESP_OFFLOAD,
                                rdev->wiphy.probe_resp_offload))
                        goto nla_put_failure;

                if ((rdev->wiphy.available_antennas_tx ||
                     rdev->wiphy.available_antennas_rx) &&
                    rdev->ops->get_antenna) {
                        u32 tx_ant = 0, rx_ant = 0;
                        int res;

                        res = rdev_get_antenna(rdev, &tx_ant, &rx_ant);
                        if (!res) {
                                if (nla_put_u32(msg,
                                                NL80211_ATTR_WIPHY_ANTENNA_TX,
                                                tx_ant) ||
                                    nla_put_u32(msg,
                                                NL80211_ATTR_WIPHY_ANTENNA_RX,
                                                rx_ant))
                                        goto nla_put_failure;
                        }
                }

                state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 2:
                if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
                                        rdev->wiphy.interface_modes))
                                goto nla_put_failure;
                state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 3:
                nl_bands = nla_nest_start_noflag(msg,
                                                 NL80211_ATTR_WIPHY_BANDS);
                if (!nl_bands)
                        goto nla_put_failure;

                for (band = state->band_start;
                     band < (state->split ?
                                NUM_NL80211_BANDS :
                                NL80211_BAND_60GHZ + 1);
                     band++) {
                        struct ieee80211_supported_band *sband;

                        /* omit higher bands for ancient software */
                        if (band > NL80211_BAND_5GHZ && !state->split)
                                break;

                        sband = rdev->wiphy.bands[band];

                        if (!sband)
                                continue;

                        nl_band = nla_nest_start_noflag(msg, band);
                        if (!nl_band)
                                goto nla_put_failure;

                        switch (state->chan_start) {
                        case 0:
                                if (nl80211_send_band_rateinfo(msg, sband,
                                                               state->split))
                                        goto nla_put_failure;
                                state->chan_start++;
                                if (state->split)
                                        break;
                                fallthrough;
                        default:
                                /* add frequencies */
                                nl_freqs = nla_nest_start_noflag(msg,
                                                                 NL80211_BAND_ATTR_FREQS);
                                if (!nl_freqs)
                                        goto nla_put_failure;

                                for (i = state->chan_start - 1;
                                     i < sband->n_channels;
                                     i++) {
                                        nl_freq = nla_nest_start_noflag(msg,
                                                                        i);
                                        if (!nl_freq)
                                                goto nla_put_failure;

                                        chan = &sband->channels[i];

                                        if (nl80211_msg_put_channel(
                                                        msg, &rdev->wiphy, chan,
                                                        state->split))
                                                goto nla_put_failure;

                                        nla_nest_end(msg, nl_freq);
                                        if (state->split)
                                                break;
                                }
                                if (i < sband->n_channels)
                                        state->chan_start = i + 2;
                                else
                                        state->chan_start = 0;
                                nla_nest_end(msg, nl_freqs);
                        }

                        nla_nest_end(msg, nl_band);

                        if (state->split) {
                                /* start again here */
                                if (state->chan_start)
                                        band--;
                                break;
                        }
                }
                nla_nest_end(msg, nl_bands);

                if (band < NUM_NL80211_BANDS)
                        state->band_start = band + 1;
                else
                        state->band_start = 0;

                /* if bands & channels are done, continue outside */
                if (state->band_start == 0 && state->chan_start == 0)
                        state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 4:
                nl_cmds = nla_nest_start_noflag(msg,
                                                NL80211_ATTR_SUPPORTED_COMMANDS);
                if (!nl_cmds)
                        goto nla_put_failure;

                i = nl80211_add_commands_unsplit(rdev, msg);
                if (i < 0)
                        goto nla_put_failure;
                if (state->split) {
                        CMD(crit_proto_start, CRIT_PROTOCOL_START);
                        CMD(crit_proto_stop, CRIT_PROTOCOL_STOP);
                        if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH)
                                CMD(channel_switch, CHANNEL_SWITCH);
                        CMD(set_qos_map, SET_QOS_MAP);
                        if (rdev->wiphy.features &
                                        NL80211_FEATURE_SUPPORTS_WMM_ADMISSION)
                                CMD(add_tx_ts, ADD_TX_TS);
                        CMD(set_multicast_to_unicast, SET_MULTICAST_TO_UNICAST);
                        CMD(update_connect_params, UPDATE_CONNECT_PARAMS);
                        CMD(update_ft_ies, UPDATE_FT_IES);
                        if (rdev->wiphy.sar_capa)
                                CMD(set_sar_specs, SET_SAR_SPECS);
                }
#undef CMD

                nla_nest_end(msg, nl_cmds);
                state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 5:
                if (rdev->ops->remain_on_channel &&
                    (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
                    nla_put_u32(msg,
                                NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
                                rdev->wiphy.max_remain_on_channel_duration))
                        goto nla_put_failure;

                if ((rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX) &&
                    nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK))
                        goto nla_put_failure;

                state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 6:
#ifdef CONFIG_PM
                if (nl80211_send_wowlan(msg, rdev, state->split))
                        goto nla_put_failure;
                state->split_start++;
                if (state->split)
                        break;
#else
                state->split_start++;
#endif
                fallthrough;
        case 7:
                if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
                                        rdev->wiphy.software_iftypes))
                        goto nla_put_failure;

                if (nl80211_put_iface_combinations(&rdev->wiphy, msg,
                                                   NL80211_ATTR_INTERFACE_COMBINATIONS,
                                                   rdev->wiphy.n_radio ? 0 : -1,
                                                   state->split, 0))
                        goto nla_put_failure;

                state->split_start++;
                if (state->split)
                        break;
                fallthrough;
        case 8:
                if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
                    nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
                                rdev->wiphy.ap_sme_capa))
                        goto nla_put_failure;

                features = rdev->wiphy.features;
                /*
                 * We can only add the per-channel limit information if the
                 * dump is split, otherwise it makes it too big. Therefore
                 * only advertise it in that case.
                 */
                if (state->split)
                        features |= NL80211_FEATURE_ADVERTISE_CHAN_LIMITS;
                if (nla_put_u32(msg, NL80211_ATTR_FEATURE_FLAGS, features))
                        goto nla_put_failure;

                if (rdev->wiphy.ht_capa_mod_mask &&
                    nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK,
                            sizeof(*rdev->wiphy.ht_capa_mod_mask),
                            rdev->wiphy.ht_capa_mod_mask))
                        goto nla_put_failure;

                if (rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME &&
                    rdev->wiphy.max_acl_mac_addrs &&
                    nla_put_u32(msg, NL80211_ATTR_MAC_ACL_MAX,
                                rdev->wiphy.max_acl_mac_addrs))
                        goto nla_put_failure;

                /*
                 * Any information below this point is only available to
                 * applications that can deal with it being split. This
                 * helps ensure that newly added capabilities don't break
                 * older tools by overrunning their buffers.
                 *
                 * We still increment split_start so that in the split
                 * case we'll continue with more data in the next round,
                 * but break unconditionally so unsplit data stops here.
                 */
                if (state->split)
                        state->split_start++;
                else
                        state->split_start = 0;
                break;
        case 9:
                if (nl80211_send_mgmt_stypes(msg, mgmt_stypes))
                        goto nla_put_failure;

                if (nla_put_u32(msg, NL80211_ATTR_MAX_NUM_SCHED_SCAN_PLANS,
                                rdev->wiphy.max_sched_scan_plans) ||
                    nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_INTERVAL,
                                rdev->wiphy.max_sched_scan_plan_interval) ||
                    nla_put_u32(msg, NL80211_ATTR_MAX_SCAN_PLAN_ITERATIONS,
                                rdev->wiphy.max_sched_scan_plan_iterations))
                        goto nla_put_failure;

                if (rdev->wiphy.extended_capabilities &&
                    (nla_put(msg, NL80211_ATTR_EXT_CAPA,
                             rdev->wiphy.extended_capabilities_len,
                             rdev->wiphy.extended_capabilities) ||
                     nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
                             rdev->wiphy.extended_capabilities_len,
                             rdev->wiphy.extended_capabilities_mask)))
                        goto nla_put_failure;

                if (rdev->wiphy.vht_capa_mod_mask &&
                    nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK,
                            sizeof(*rdev->wiphy.vht_capa_mod_mask),
                            rdev->wiphy.vht_capa_mod_mask))
                        goto nla_put_failure;

                if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
                            rdev->wiphy.perm_addr))
                        goto nla_put_failure;

                if (!is_zero_ether_addr(rdev->wiphy.addr_mask) &&
                    nla_put(msg, NL80211_ATTR_MAC_MASK, ETH_ALEN,
                            rdev->wiphy.addr_mask))
                        goto nla_put_failure;

                if (rdev->wiphy.n_addresses > 1) {
                        void *attr;

                        attr = nla_nest_start(msg, NL80211_ATTR_MAC_ADDRS);
                        if (!attr)
                                goto nla_put_failure;

                        for (i = 0; i < rdev->wiphy.n_addresses; i++)
                                if (nla_put(msg, i + 1, ETH_ALEN,
                                            rdev->wiphy.addresses[i].addr))
                                        goto nla_put_failure;

                        nla_nest_end(msg, attr);
                }

                state->split_start++;
                break;
        case 10:
                if (nl80211_send_coalesce(msg, rdev))
                        goto nla_put_failure;

                if ((rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ) &&
                    (nla_put_flag(msg, NL80211_ATTR_SUPPORT_5_MHZ) ||
                     nla_put_flag(msg, NL80211_ATTR_SUPPORT_10_MHZ)))
                        goto nla_put_failure;

                if (rdev->wiphy.max_ap_assoc_sta &&
                    nla_put_u32(msg, NL80211_ATTR_MAX_AP_ASSOC_STA,
                                rdev->wiphy.max_ap_assoc_sta))
                        goto nla_put_failure;

                state->split_start++;
                break;
        case 11:
                if (rdev->wiphy.n_vendor_commands) {
                        const struct nl80211_vendor_cmd_info *info;
                        struct nlattr *nested;

                        nested = nla_nest_start_noflag(msg,
                                                       NL80211_ATTR_VENDOR_DATA);
                        if (!nested)
                                goto nla_put_failure;

                        for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
                                info = &rdev->wiphy.vendor_commands[i].info;
                                if (nla_put(msg, i + 1, sizeof(*info), info))
                                        goto nla_put_failure;
                        }
                        nla_nest_end(msg, nested);
                }

                if (rdev->wiphy.n_vendor_events) {
                        const struct nl80211_vendor_cmd_info *info;
                        struct nlattr *nested;

                        nested = nla_nest_start_noflag(msg,
                                                       NL80211_ATTR_VENDOR_EVENTS);
                        if (!nested)
                                goto nla_put_failure;

                        for (i = 0; i < rdev->wiphy.n_vendor_events; i++) {
                                info = &rdev->wiphy.vendor_events[i];
                                if (nla_put(msg, i + 1, sizeof(*info), info))
                                        goto nla_put_failure;
                        }
                        nla_nest_end(msg, nested);
                }
                state->split_start++;
                break;
        case 12:
                if (rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH &&
                    nla_put_u8(msg, NL80211_ATTR_MAX_CSA_COUNTERS,
                               rdev->wiphy.max_num_csa_counters))
                        goto nla_put_failure;

                if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
                    nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
                        goto nla_put_failure;

                if (rdev->wiphy.max_sched_scan_reqs &&
                    nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_MAX_REQS,
                                rdev->wiphy.max_sched_scan_reqs))
                        goto nla_put_failure;

                if (nla_put(msg, NL80211_ATTR_EXT_FEATURES,
                            sizeof(rdev->wiphy.ext_features),
                            rdev->wiphy.ext_features))
                        goto nla_put_failure;

                if (rdev->wiphy.bss_select_support) {
                        struct nlattr *nested;
                        u32 bss_select_support = rdev->wiphy.bss_select_support;

                        nested = nla_nest_start_noflag(msg,
                                                       NL80211_ATTR_BSS_SELECT);
                        if (!nested)
                                goto nla_put_failure;

                        i = 0;
                        while (bss_select_support) {
                                if ((bss_select_support & 1) &&
                                    nla_put_flag(msg, i))
                                        goto nla_put_failure;
                                i++;
                                bss_select_support >>= 1;
                        }
                        nla_nest_end(msg, nested);
                }

                state->split_start++;
                break;
        case 13:
                if (rdev->wiphy.num_iftype_ext_capab &&
                    rdev->wiphy.iftype_ext_capab) {
                        struct nlattr *nested_ext_capab, *nested;

                        nested = nla_nest_start_noflag(msg,
                                                       NL80211_ATTR_IFTYPE_EXT_CAPA);
                        if (!nested)
                                goto nla_put_failure;

                        for (i = state->capa_start;
                             i < rdev->wiphy.num_iftype_ext_capab; i++) {
                                const struct wiphy_iftype_ext_capab *capab;

                                capab = &rdev->wiphy.iftype_ext_capab[i];

                                nested_ext_capab = nla_nest_start_noflag(msg,
                                                                         i);
                                if (!nested_ext_capab ||
                                    nla_put_u32(msg, NL80211_ATTR_IFTYPE,
                                                capab->iftype) ||
                                    nla_put(msg, NL80211_ATTR_EXT_CAPA,
                                            capab->extended_capabilities_len,
                                            capab->extended_capabilities) ||
                                    nla_put(msg, NL80211_ATTR_EXT_CAPA_MASK,
                                            capab->extended_capabilities_len,
                                            capab->extended_capabilities_mask))
                                        goto nla_put_failure;

                                if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_MLO &&
                                    (nla_put_u16(msg,
                                                 NL80211_ATTR_EML_CAPABILITY,
                                                 capab->eml_capabilities) ||
                                     nla_put_u16(msg,
                                                 NL80211_ATTR_MLD_CAPA_AND_OPS,
                                                 capab->mld_capa_and_ops)))
                                        goto nla_put_failure;

                                nla_nest_end(msg, nested_ext_capab);
                                if (state->split)
                                        break;
                        }
                        nla_nest_end(msg, nested);
                        if (i < rdev->wiphy.num_iftype_ext_capab) {
                                state->capa_start = i + 1;
                                break;
                        }
                }

                if (nla_put_u32(msg, NL80211_ATTR_BANDS,
                                rdev->wiphy.nan_supported_bands))
                        goto nla_put_failure;

                if (wiphy_ext_feature_isset(&rdev->wiphy,
                                            NL80211_EXT_FEATURE_TXQS)) {
                        struct cfg80211_txq_stats txqstats = {};
                        int res;

                        res = rdev_get_txq_stats(rdev, NULL, &txqstats);
                        if (!res &&
                            !nl80211_put_txq_stats(msg, &txqstats,
                                                   NL80211_ATTR_TXQ_STATS))
                                goto nla_put_failure;

                        if (nla_put_u32(msg, NL80211_ATTR_TXQ_LIMIT,
                                        rdev->wiphy.txq_limit))
                                goto nla_put_failure;
                        if (nla_put_u32(msg, NL80211_ATTR_TXQ_MEMORY_LIMIT,
                                        rdev->wiphy.txq_memory_limit))
                                goto nla_put_failure;
                        if (nla_put_u32(msg, NL80211_ATTR_TXQ_QUANTUM,
                                        rdev->wiphy.txq_quantum))
                                goto nla_put_failure;
                }

                state->split_start++;
                break;
        case 14:
                if (nl80211_send_pmsr_capa(rdev, msg))
                        goto nla_put_failure;

                state->split_start++;
                break;
        case 15:
                if (rdev->wiphy.akm_suites &&
                    nla_put(msg, NL80211_ATTR_AKM_SUITES,
                            sizeof(u32) * rdev->wiphy.n_akm_suites,
                            rdev->wiphy.akm_suites))
                        goto nla_put_failure;

                if (nl80211_put_iftype_akm_suites(rdev, msg))
                        goto nla_put_failure;

                if (nl80211_put_tid_config_support(rdev, msg))
                        goto nla_put_failure;
                state->split_start++;
                break;
        case 16:
                if (nl80211_put_sar_specs(rdev, msg))
                        goto nla_put_failure;

                if (nl80211_put_mbssid_support(&rdev->wiphy, msg))
                        goto nla_put_failure;

                if (nla_put_u16(msg, NL80211_ATTR_MAX_NUM_AKM_SUITES,
                                rdev->wiphy.max_num_akm_suites))
                        goto nla_put_failure;

                if (rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_MLO)
                        nla_put_flag(msg, NL80211_ATTR_MLO_SUPPORT);

                if (rdev->wiphy.hw_timestamp_max_peers &&
                    nla_put_u16(msg, NL80211_ATTR_MAX_HW_TIMESTAMP_PEERS,
                                rdev->wiphy.hw_timestamp_max_peers))
                        goto nla_put_failure;

                state->split_start++;
                break;
        case 17:
                if (nl80211_put_radios(&rdev->wiphy, msg))
                        goto nla_put_failure;

                /* done */
                state->split_start = 0;
                break;
        }
 finish:
        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_dump_wiphy_parse(struct sk_buff *skb,
                                    struct netlink_callback *cb,
                                    struct nl80211_dump_wiphy_state *state)
{
        struct nlattr **tb = kcalloc(NUM_NL80211_ATTR, sizeof(*tb), GFP_KERNEL);
        int ret;

        if (!tb)
                return -ENOMEM;

        ret = nlmsg_parse_deprecated(cb->nlh,
                                     GENL_HDRLEN + nl80211_fam.hdrsize,
                                     tb, nl80211_fam.maxattr,
                                     nl80211_policy, NULL);
        /* ignore parse errors for backward compatibility */
        if (ret) {
                ret = 0;
                goto out;
        }

        state->split = tb[NL80211_ATTR_SPLIT_WIPHY_DUMP];
        if (tb[NL80211_ATTR_WIPHY])
                state->filter_wiphy = nla_get_u32(tb[NL80211_ATTR_WIPHY]);
        if (tb[NL80211_ATTR_WDEV])
                state->filter_wiphy = nla_get_u64(tb[NL80211_ATTR_WDEV]) >> 32;
        if (tb[NL80211_ATTR_IFINDEX]) {
                struct net_device *netdev;
                struct cfg80211_registered_device *rdev;
                int ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);

                netdev = __dev_get_by_index(sock_net(skb->sk), ifidx);
                if (!netdev) {
                        ret = -ENODEV;
                        goto out;
                }
                if (netdev->ieee80211_ptr) {
                        rdev = wiphy_to_rdev(
                                netdev->ieee80211_ptr->wiphy);
                        state->filter_wiphy = rdev->wiphy_idx;
                }
        }

        ret = 0;
out:
        kfree(tb);
        return ret;
}

static int nl80211_dump_wiphy(struct sk_buff *skb, struct netlink_callback *cb)
{
        int idx = 0, ret;
        struct nl80211_dump_wiphy_state *state = (void *)cb->args[0];
        struct cfg80211_registered_device *rdev;

        rtnl_lock();
        if (!state) {
                state = kzalloc(sizeof(*state), GFP_KERNEL);
                if (!state) {
                        rtnl_unlock();
                        return -ENOMEM;
                }
                state->filter_wiphy = -1;
                ret = nl80211_dump_wiphy_parse(skb, cb, state);
                if (ret) {
                        kfree(state);
                        rtnl_unlock();
                        return ret;
                }
                cb->args[0] = (long)state;
        }

        for_each_rdev(rdev) {
                if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
                        continue;
                if (++idx <= state->start)
                        continue;
                if (state->filter_wiphy != -1 &&
                    state->filter_wiphy != rdev->wiphy_idx)
                        continue;
                wiphy_lock(&rdev->wiphy);
                /* attempt to fit multiple wiphy data chunks into the skb */
                do {
                        ret = nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY,
                                                 skb,
                                                 NETLINK_CB(cb->skb).portid,
                                                 cb->nlh->nlmsg_seq,
                                                 NLM_F_MULTI, state);
                        if (ret < 0) {
                                /*
                                 * If sending the wiphy data didn't fit (ENOBUFS
                                 * or EMSGSIZE returned), this SKB is still
                                 * empty (so it's not too big because another
                                 * wiphy dataset is already in the skb) and
                                 * we've not tried to adjust the dump allocation
                                 * yet ... then adjust the alloc size to be
                                 * bigger, and return 1 but with the empty skb.
                                 * This results in an empty message being RX'ed
                                 * in userspace, but that is ignored.
                                 *
                                 * We can then retry with the larger buffer.
                                 */
                                if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
                                    !skb->len && !state->split &&
                                    cb->min_dump_alloc < 4096) {
                                        cb->min_dump_alloc = 4096;
                                        state->split_start = 0;
                                        wiphy_unlock(&rdev->wiphy);
                                        rtnl_unlock();
                                        return 1;
                                }
                                idx--;
                                break;
                        }
                } while (state->split_start > 0);
                wiphy_unlock(&rdev->wiphy);
                break;
        }
        rtnl_unlock();

        state->start = idx;

        return skb->len;
}

static int nl80211_dump_wiphy_done(struct netlink_callback *cb)
{
        kfree((void *)cb->args[0]);
        return 0;
}

static int nl80211_get_wiphy(struct sk_buff *skb, struct genl_info *info)
{
        struct sk_buff *msg;
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct nl80211_dump_wiphy_state state = {};

        msg = nlmsg_new(4096, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        if (nl80211_send_wiphy(rdev, NL80211_CMD_NEW_WIPHY, msg,
                               info->snd_portid, info->snd_seq, 0,
                               &state) < 0) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return genlmsg_reply(msg, info);
}

static const struct nla_policy txq_params_policy[NL80211_TXQ_ATTR_MAX + 1] = {
        [NL80211_TXQ_ATTR_QUEUE]                = { .type = NLA_U8 },
        [NL80211_TXQ_ATTR_TXOP]                        = { .type = NLA_U16 },
        [NL80211_TXQ_ATTR_CWMIN]                = { .type = NLA_U16 },
        [NL80211_TXQ_ATTR_CWMAX]                = { .type = NLA_U16 },
        [NL80211_TXQ_ATTR_AIFS]                        = { .type = NLA_U8 },
};

static int parse_txq_params(struct nlattr *tb[],
                            struct ieee80211_txq_params *txq_params)
{
        u8 ac;

        if (!tb[NL80211_TXQ_ATTR_AC] || !tb[NL80211_TXQ_ATTR_TXOP] ||
            !tb[NL80211_TXQ_ATTR_CWMIN] || !tb[NL80211_TXQ_ATTR_CWMAX] ||
            !tb[NL80211_TXQ_ATTR_AIFS])
                return -EINVAL;

        ac = nla_get_u8(tb[NL80211_TXQ_ATTR_AC]);
        txq_params->txop = nla_get_u16(tb[NL80211_TXQ_ATTR_TXOP]);
        txq_params->cwmin = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMIN]);
        txq_params->cwmax = nla_get_u16(tb[NL80211_TXQ_ATTR_CWMAX]);
        txq_params->aifs = nla_get_u8(tb[NL80211_TXQ_ATTR_AIFS]);

        if (ac >= NL80211_NUM_ACS)
                return -EINVAL;
        txq_params->ac = array_index_nospec(ac, NL80211_NUM_ACS);
        return 0;
}

static bool nl80211_can_set_dev_channel(struct wireless_dev *wdev)
{
        /*
         * You can only set the channel explicitly for some interfaces,
         * most have their channel managed via their respective
         * "establish a connection" command (connect, join, ...)
         *
         * For AP/GO and mesh mode, the channel can be set with the
         * channel userspace API, but is only stored and passed to the
         * low-level driver when the AP starts or the mesh is joined.
         * This is for backward compatibility, userspace can also give
         * the channel in the start-ap or join-mesh commands instead.
         *
         * Monitors are special as they are normally slaved to
         * whatever else is going on, so they have their own special
         * operation to set the monitor channel if possible.
         */
        return !wdev ||
                wdev->iftype == NL80211_IFTYPE_AP ||
                wdev->iftype == NL80211_IFTYPE_MESH_POINT ||
                wdev->iftype == NL80211_IFTYPE_MONITOR ||
                wdev->iftype == NL80211_IFTYPE_P2P_GO;
}

static int _nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
                                  struct genl_info *info, bool monitor,
                                  struct cfg80211_chan_def *chandef)
{
        struct netlink_ext_ack *extack = info->extack;
        struct nlattr **attrs = info->attrs;
        u32 control_freq;

        if (!attrs[NL80211_ATTR_WIPHY_FREQ]) {
                NL_SET_ERR_MSG_ATTR(extack, attrs[NL80211_ATTR_WIPHY_FREQ],
                                    "Frequency is missing");
                return -EINVAL;
        }

        control_freq = MHZ_TO_KHZ(
                        nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
        if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
                control_freq +=
                    nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);

        memset(chandef, 0, sizeof(*chandef));
        chandef->chan = ieee80211_get_channel_khz(&rdev->wiphy, control_freq);
        chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
        chandef->center_freq1 = KHZ_TO_MHZ(control_freq);
        chandef->freq1_offset = control_freq % 1000;
        chandef->center_freq2 = 0;

        if (!chandef->chan) {
                NL_SET_ERR_MSG_ATTR(extack, attrs[NL80211_ATTR_WIPHY_FREQ],
                                    "Unknown channel");
                return -EINVAL;
        }

        if (attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
                enum nl80211_channel_type chantype;

                chantype = nla_get_u32(attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);

                switch (chantype) {
                case NL80211_CHAN_NO_HT:
                case NL80211_CHAN_HT20:
                case NL80211_CHAN_HT40PLUS:
                case NL80211_CHAN_HT40MINUS:
                        cfg80211_chandef_create(chandef, chandef->chan,
                                                chantype);
                        /* user input for center_freq is incorrect */
                        if (attrs[NL80211_ATTR_CENTER_FREQ1] &&
                            chandef->center_freq1 != nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ1])) {
                                NL_SET_ERR_MSG_ATTR(extack,
                                                    attrs[NL80211_ATTR_CENTER_FREQ1],
                                                    "bad center frequency 1");
                                return -EINVAL;
                        }
                        /* center_freq2 must be zero */
                        if (attrs[NL80211_ATTR_CENTER_FREQ2] &&
                            nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ2])) {
                                NL_SET_ERR_MSG_ATTR(extack,
                                                    attrs[NL80211_ATTR_CENTER_FREQ2],
                                                    "center frequency 2 can't be used");
                                return -EINVAL;
                        }
                        break;
                default:
                        NL_SET_ERR_MSG_ATTR(extack,
                                            attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE],
                                            "invalid channel type");
                        return -EINVAL;
                }
        } else if (attrs[NL80211_ATTR_CHANNEL_WIDTH]) {
                chandef->width =
                        nla_get_u32(attrs[NL80211_ATTR_CHANNEL_WIDTH]);
                if (chandef->chan->band == NL80211_BAND_S1GHZ) {
                        /* User input error for channel width doesn't match channel  */
                        if (chandef->width != ieee80211_s1g_channel_width(chandef->chan)) {
                                NL_SET_ERR_MSG_ATTR(extack,
                                                    attrs[NL80211_ATTR_CHANNEL_WIDTH],
                                                    "bad channel width");
                                return -EINVAL;
                        }
                }
                if (attrs[NL80211_ATTR_CENTER_FREQ1]) {
                        chandef->center_freq1 =
                                nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ1]);
                        if (attrs[NL80211_ATTR_CENTER_FREQ1_OFFSET])
                                chandef->freq1_offset = nla_get_u32(
                                      attrs[NL80211_ATTR_CENTER_FREQ1_OFFSET]);
                        else
                                chandef->freq1_offset = 0;
                }
                if (attrs[NL80211_ATTR_CENTER_FREQ2])
                        chandef->center_freq2 =
                                nla_get_u32(attrs[NL80211_ATTR_CENTER_FREQ2]);
        }

        if (info->attrs[NL80211_ATTR_WIPHY_EDMG_CHANNELS]) {
                chandef->edmg.channels =
                      nla_get_u8(info->attrs[NL80211_ATTR_WIPHY_EDMG_CHANNELS]);

                if (info->attrs[NL80211_ATTR_WIPHY_EDMG_BW_CONFIG])
                        chandef->edmg.bw_config =
                     nla_get_u8(info->attrs[NL80211_ATTR_WIPHY_EDMG_BW_CONFIG]);
        } else {
                chandef->edmg.bw_config = 0;
                chandef->edmg.channels = 0;
        }

        if (info->attrs[NL80211_ATTR_PUNCT_BITMAP]) {
                chandef->punctured =
                        nla_get_u32(info->attrs[NL80211_ATTR_PUNCT_BITMAP]);

                if (chandef->punctured &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_PUNCT)) {
                        NL_SET_ERR_MSG(extack,
                                       "driver doesn't support puncturing");
                        return -EINVAL;
                }
        }

        if (!cfg80211_chandef_valid(chandef)) {
                NL_SET_ERR_MSG(extack, "invalid channel definition");
                return -EINVAL;
        }

        if (!_cfg80211_chandef_usable(&rdev->wiphy, chandef,
                                      IEEE80211_CHAN_DISABLED,
                                      monitor ? IEEE80211_CHAN_CAN_MONITOR : 0)) {
                NL_SET_ERR_MSG(extack, "(extension) channel is disabled");
                return -EINVAL;
        }

        if ((chandef->width == NL80211_CHAN_WIDTH_5 ||
             chandef->width == NL80211_CHAN_WIDTH_10) &&
            !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_5_10_MHZ)) {
                NL_SET_ERR_MSG(extack, "5/10 MHz not supported");
                return -EINVAL;
        }

        return 0;
}

int nl80211_parse_chandef(struct cfg80211_registered_device *rdev,
                          struct genl_info *info,
                          struct cfg80211_chan_def *chandef)
{
        return _nl80211_parse_chandef(rdev, info, false, chandef);
}

static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
                                 struct net_device *dev,
                                 struct genl_info *info,
                                 int _link_id)
{
        struct cfg80211_chan_def chandef;
        int result;
        enum nl80211_iftype iftype = NL80211_IFTYPE_MONITOR;
        struct wireless_dev *wdev = NULL;
        int link_id = _link_id;

        if (dev)
                wdev = dev->ieee80211_ptr;
        if (!nl80211_can_set_dev_channel(wdev))
                return -EOPNOTSUPP;
        if (wdev)
                iftype = wdev->iftype;

        if (link_id < 0) {
                if (wdev && wdev->valid_links)
                        return -EINVAL;
                link_id = 0;
        }

        result = _nl80211_parse_chandef(rdev, info,
                                        iftype == NL80211_IFTYPE_MONITOR,
                                        &chandef);
        if (result)
                return result;

        switch (iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
                if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
                                                   iftype))
                        return -EINVAL;
                if (wdev->links[link_id].ap.beacon_interval) {
                        struct ieee80211_channel *cur_chan;

                        if (!dev || !rdev->ops->set_ap_chanwidth ||
                            !(rdev->wiphy.features &
                              NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE))
                                return -EBUSY;

                        /* Only allow dynamic channel width changes */
                        cur_chan = wdev->links[link_id].ap.chandef.chan;
                        if (chandef.chan != cur_chan)
                                return -EBUSY;

                        /* only allow this for regular channel widths */
                        switch (wdev->links[link_id].ap.chandef.width) {
                        case NL80211_CHAN_WIDTH_20_NOHT:
                        case NL80211_CHAN_WIDTH_20:
                        case NL80211_CHAN_WIDTH_40:
                        case NL80211_CHAN_WIDTH_80:
                        case NL80211_CHAN_WIDTH_80P80:
                        case NL80211_CHAN_WIDTH_160:
                        case NL80211_CHAN_WIDTH_320:
                                break;
                        default:
                                return -EINVAL;
                        }

                        switch (chandef.width) {
                        case NL80211_CHAN_WIDTH_20_NOHT:
                        case NL80211_CHAN_WIDTH_20:
                        case NL80211_CHAN_WIDTH_40:
                        case NL80211_CHAN_WIDTH_80:
                        case NL80211_CHAN_WIDTH_80P80:
                        case NL80211_CHAN_WIDTH_160:
                        case NL80211_CHAN_WIDTH_320:
                                break;
                        default:
                                return -EINVAL;
                        }

                        result = rdev_set_ap_chanwidth(rdev, dev, link_id,
                                                       &chandef);
                        if (result)
                                return result;
                        wdev->links[link_id].ap.chandef = chandef;
                } else {
                        wdev->u.ap.preset_chandef = chandef;
                }
                return 0;
        case NL80211_IFTYPE_MESH_POINT:
                return cfg80211_set_mesh_channel(rdev, wdev, &chandef);
        case NL80211_IFTYPE_MONITOR:
                return cfg80211_set_monitor_channel(rdev, &chandef);
        default:
                break;
        }

        return -EINVAL;
}

static int nl80211_set_channel(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int link_id = nl80211_link_id_or_invalid(info->attrs);
        struct net_device *netdev = info->user_ptr[1];

        return __nl80211_set_channel(rdev, netdev, info, link_id);
}

static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = NULL;
        struct net_device *netdev = NULL;
        struct wireless_dev *wdev;
        int result = 0, rem_txq_params = 0;
        struct nlattr *nl_txq_params;
        u32 changed;
        u8 retry_short = 0, retry_long = 0;
        u32 frag_threshold = 0, rts_threshold = 0;
        u8 coverage_class = 0;
        u32 txq_limit = 0, txq_memory_limit = 0, txq_quantum = 0;

        rtnl_lock();
        /*
         * Try to find the wiphy and netdev. Normally this
         * function shouldn't need the netdev, but this is
         * done for backward compatibility -- previously
         * setting the channel was done per wiphy, but now
         * it is per netdev. Previous userland like hostapd
         * also passed a netdev to set_wiphy, so that it is
         * possible to let that go to the right netdev!
         */

        if (info->attrs[NL80211_ATTR_IFINDEX]) {
                int ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);

                netdev = __dev_get_by_index(genl_info_net(info), ifindex);
                if (netdev && netdev->ieee80211_ptr)
                        rdev = wiphy_to_rdev(netdev->ieee80211_ptr->wiphy);
                else
                        netdev = NULL;
        }

        if (!netdev) {
                rdev = __cfg80211_rdev_from_attrs(genl_info_net(info),
                                                  info->attrs);
                if (IS_ERR(rdev)) {
                        rtnl_unlock();
                        return PTR_ERR(rdev);
                }
                wdev = NULL;
                netdev = NULL;
                result = 0;
        } else
                wdev = netdev->ieee80211_ptr;

        wiphy_lock(&rdev->wiphy);

        /*
         * end workaround code, by now the rdev is available
         * and locked, and wdev may or may not be NULL.
         */

        if (info->attrs[NL80211_ATTR_WIPHY_NAME])
                result = cfg80211_dev_rename(
                        rdev, nla_data(info->attrs[NL80211_ATTR_WIPHY_NAME]));
        rtnl_unlock();

        if (result)
                goto out;

        if (info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS]) {
                struct ieee80211_txq_params txq_params;
                struct nlattr *tb[NL80211_TXQ_ATTR_MAX + 1];

                if (!rdev->ops->set_txq_params) {
                        result = -EOPNOTSUPP;
                        goto out;
                }

                if (!netdev) {
                        result = -EINVAL;
                        goto out;
                }

                if (netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
                    netdev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
                        result = -EINVAL;
                        goto out;
                }

                if (!netif_running(netdev)) {
                        result = -ENETDOWN;
                        goto out;
                }

                nla_for_each_nested(nl_txq_params,
                                    info->attrs[NL80211_ATTR_WIPHY_TXQ_PARAMS],
                                    rem_txq_params) {
                        result = nla_parse_nested_deprecated(tb,
                                                             NL80211_TXQ_ATTR_MAX,
                                                             nl_txq_params,
                                                             txq_params_policy,
                                                             info->extack);
                        if (result)
                                goto out;
                        result = parse_txq_params(tb, &txq_params);
                        if (result)
                                goto out;

                        txq_params.link_id =
                                nl80211_link_id_or_invalid(info->attrs);

                        if (txq_params.link_id >= 0 &&
                            !(netdev->ieee80211_ptr->valid_links &
                              BIT(txq_params.link_id)))
                                result = -ENOLINK;
                        else if (txq_params.link_id >= 0 &&
                                 !netdev->ieee80211_ptr->valid_links)
                                result = -EINVAL;
                        else
                                result = rdev_set_txq_params(rdev, netdev,
                                                             &txq_params);
                        if (result)
                                goto out;
                }
        }

        if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
                int link_id = nl80211_link_id_or_invalid(info->attrs);

                if (wdev) {
                        result = __nl80211_set_channel(
                                rdev,
                                nl80211_can_set_dev_channel(wdev) ? netdev : NULL,
                                info, link_id);
                } else {
                        result = __nl80211_set_channel(rdev, netdev, info, link_id);
                }

                if (result)
                        goto out;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_TX_POWER_SETTING]) {
                struct wireless_dev *txp_wdev = wdev;
                enum nl80211_tx_power_setting type;
                int idx, mbm = 0;

                if (!(rdev->wiphy.features & NL80211_FEATURE_VIF_TXPOWER))
                        txp_wdev = NULL;

                if (!rdev->ops->set_tx_power) {
                        result = -EOPNOTSUPP;
                        goto out;
                }

                idx = NL80211_ATTR_WIPHY_TX_POWER_SETTING;
                type = nla_get_u32(info->attrs[idx]);

                if (!info->attrs[NL80211_ATTR_WIPHY_TX_POWER_LEVEL] &&
                    (type != NL80211_TX_POWER_AUTOMATIC)) {
                        result = -EINVAL;
                        goto out;
                }

                if (type != NL80211_TX_POWER_AUTOMATIC) {
                        idx = NL80211_ATTR_WIPHY_TX_POWER_LEVEL;
                        mbm = nla_get_u32(info->attrs[idx]);
                }

                result = rdev_set_tx_power(rdev, txp_wdev, type, mbm);
                if (result)
                        goto out;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&
            info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]) {
                u32 tx_ant, rx_ant;

                if ((!rdev->wiphy.available_antennas_tx &&
                     !rdev->wiphy.available_antennas_rx) ||
                    !rdev->ops->set_antenna) {
                        result = -EOPNOTSUPP;
                        goto out;
                }

                tx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX]);
                rx_ant = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_ANTENNA_RX]);

                /* reject antenna configurations which don't match the
                 * available antenna masks, except for the "all" mask */
                if ((~tx_ant && (tx_ant & ~rdev->wiphy.available_antennas_tx)) ||
                    (~rx_ant && (rx_ant & ~rdev->wiphy.available_antennas_rx))) {
                        result = -EINVAL;
                        goto out;
                }

                tx_ant = tx_ant & rdev->wiphy.available_antennas_tx;
                rx_ant = rx_ant & rdev->wiphy.available_antennas_rx;

                result = rdev_set_antenna(rdev, tx_ant, rx_ant);
                if (result)
                        goto out;
        }

        changed = 0;

        if (info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]) {
                retry_short = nla_get_u8(
                        info->attrs[NL80211_ATTR_WIPHY_RETRY_SHORT]);

                changed |= WIPHY_PARAM_RETRY_SHORT;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]) {
                retry_long = nla_get_u8(
                        info->attrs[NL80211_ATTR_WIPHY_RETRY_LONG]);

                changed |= WIPHY_PARAM_RETRY_LONG;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]) {
                frag_threshold = nla_get_u32(
                        info->attrs[NL80211_ATTR_WIPHY_FRAG_THRESHOLD]);
                if (frag_threshold < 256) {
                        result = -EINVAL;
                        goto out;
                }

                if (frag_threshold != (u32) -1) {
                        /*
                         * Fragments (apart from the last one) are required to
                         * have even length. Make the fragmentation code
                         * simpler by stripping LSB should someone try to use
                         * odd threshold value.
                         */
                        frag_threshold &= ~0x1;
                }
                changed |= WIPHY_PARAM_FRAG_THRESHOLD;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]) {
                rts_threshold = nla_get_u32(
                        info->attrs[NL80211_ATTR_WIPHY_RTS_THRESHOLD]);
                changed |= WIPHY_PARAM_RTS_THRESHOLD;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]) {
                if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
                        result = -EINVAL;
                        goto out;
                }

                coverage_class = nla_get_u8(
                        info->attrs[NL80211_ATTR_WIPHY_COVERAGE_CLASS]);
                changed |= WIPHY_PARAM_COVERAGE_CLASS;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_DYN_ACK]) {
                if (!(rdev->wiphy.features & NL80211_FEATURE_ACKTO_ESTIMATION)) {
                        result = -EOPNOTSUPP;
                        goto out;
                }

                changed |= WIPHY_PARAM_DYN_ACK;
        }

        if (info->attrs[NL80211_ATTR_TXQ_LIMIT]) {
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_TXQS)) {
                        result = -EOPNOTSUPP;
                        goto out;
                }
                txq_limit = nla_get_u32(
                        info->attrs[NL80211_ATTR_TXQ_LIMIT]);
                changed |= WIPHY_PARAM_TXQ_LIMIT;
        }

        if (info->attrs[NL80211_ATTR_TXQ_MEMORY_LIMIT]) {
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_TXQS)) {
                        result = -EOPNOTSUPP;
                        goto out;
                }
                txq_memory_limit = nla_get_u32(
                        info->attrs[NL80211_ATTR_TXQ_MEMORY_LIMIT]);
                changed |= WIPHY_PARAM_TXQ_MEMORY_LIMIT;
        }

        if (info->attrs[NL80211_ATTR_TXQ_QUANTUM]) {
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_TXQS)) {
                        result = -EOPNOTSUPP;
                        goto out;
                }
                txq_quantum = nla_get_u32(
                        info->attrs[NL80211_ATTR_TXQ_QUANTUM]);
                changed |= WIPHY_PARAM_TXQ_QUANTUM;
        }

        if (changed) {
                u8 old_retry_short, old_retry_long;
                u32 old_frag_threshold, old_rts_threshold;
                u8 old_coverage_class;
                u32 old_txq_limit, old_txq_memory_limit, old_txq_quantum;

                if (!rdev->ops->set_wiphy_params) {
                        result = -EOPNOTSUPP;
                        goto out;
                }

                old_retry_short = rdev->wiphy.retry_short;
                old_retry_long = rdev->wiphy.retry_long;
                old_frag_threshold = rdev->wiphy.frag_threshold;
                old_rts_threshold = rdev->wiphy.rts_threshold;
                old_coverage_class = rdev->wiphy.coverage_class;
                old_txq_limit = rdev->wiphy.txq_limit;
                old_txq_memory_limit = rdev->wiphy.txq_memory_limit;
                old_txq_quantum = rdev->wiphy.txq_quantum;

                if (changed & WIPHY_PARAM_RETRY_SHORT)
                        rdev->wiphy.retry_short = retry_short;
                if (changed & WIPHY_PARAM_RETRY_LONG)
                        rdev->wiphy.retry_long = retry_long;
                if (changed & WIPHY_PARAM_FRAG_THRESHOLD)
                        rdev->wiphy.frag_threshold = frag_threshold;
                if (changed & WIPHY_PARAM_RTS_THRESHOLD)
                        rdev->wiphy.rts_threshold = rts_threshold;
                if (changed & WIPHY_PARAM_COVERAGE_CLASS)
                        rdev->wiphy.coverage_class = coverage_class;
                if (changed & WIPHY_PARAM_TXQ_LIMIT)
                        rdev->wiphy.txq_limit = txq_limit;
                if (changed & WIPHY_PARAM_TXQ_MEMORY_LIMIT)
                        rdev->wiphy.txq_memory_limit = txq_memory_limit;
                if (changed & WIPHY_PARAM_TXQ_QUANTUM)
                        rdev->wiphy.txq_quantum = txq_quantum;

                result = rdev_set_wiphy_params(rdev, changed);
                if (result) {
                        rdev->wiphy.retry_short = old_retry_short;
                        rdev->wiphy.retry_long = old_retry_long;
                        rdev->wiphy.frag_threshold = old_frag_threshold;
                        rdev->wiphy.rts_threshold = old_rts_threshold;
                        rdev->wiphy.coverage_class = old_coverage_class;
                        rdev->wiphy.txq_limit = old_txq_limit;
                        rdev->wiphy.txq_memory_limit = old_txq_memory_limit;
                        rdev->wiphy.txq_quantum = old_txq_quantum;
                        goto out;
                }
        }

        result = 0;

out:
        wiphy_unlock(&rdev->wiphy);
        return result;
}

int nl80211_send_chandef(struct sk_buff *msg, const struct cfg80211_chan_def *chandef)
{
        if (WARN_ON(!cfg80211_chandef_valid(chandef)))
                return -EINVAL;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
                        chandef->chan->center_freq))
                return -ENOBUFS;
        if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_OFFSET,
                        chandef->chan->freq_offset))
                return -ENOBUFS;
        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_20_NOHT:
        case NL80211_CHAN_WIDTH_20:
        case NL80211_CHAN_WIDTH_40:
                if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
                                cfg80211_get_chandef_type(chandef)))
                        return -ENOBUFS;
                break;
        default:
                break;
        }
        if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, chandef->width))
                return -ENOBUFS;
        if (nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1, chandef->center_freq1))
                return -ENOBUFS;
        if (chandef->center_freq2 &&
            nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2, chandef->center_freq2))
                return -ENOBUFS;
        if (chandef->punctured &&
            nla_put_u32(msg, NL80211_ATTR_PUNCT_BITMAP, chandef->punctured))
                return -ENOBUFS;

        return 0;
}
EXPORT_SYMBOL(nl80211_send_chandef);

static int nl80211_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
                              struct cfg80211_registered_device *rdev,
                              struct wireless_dev *wdev,
                              enum nl80211_commands cmd)
{
        struct net_device *dev = wdev->netdev;
        void *hdr;

        lockdep_assert_wiphy(&rdev->wiphy);

        WARN_ON(cmd != NL80211_CMD_NEW_INTERFACE &&
                cmd != NL80211_CMD_DEL_INTERFACE &&
                cmd != NL80211_CMD_SET_INTERFACE);

        hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
        if (!hdr)
                return -1;

        if (dev &&
            (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
             nla_put_string(msg, NL80211_ATTR_IFNAME, dev->name)))
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFTYPE, wdev->iftype) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, wdev_address(wdev)) ||
            nla_put_u32(msg, NL80211_ATTR_GENERATION,
                        rdev->devlist_generation ^
                        (cfg80211_rdev_list_generation << 2)) ||
            nla_put_u8(msg, NL80211_ATTR_4ADDR, wdev->use_4addr))
                goto nla_put_failure;

        if (rdev->ops->get_channel && !wdev->valid_links) {
                struct cfg80211_chan_def chandef = {};
                int ret;

                ret = rdev_get_channel(rdev, wdev, 0, &chandef);
                if (ret == 0 && nl80211_send_chandef(msg, &chandef))
                        goto nla_put_failure;
        }

        if (rdev->ops->get_tx_power) {
                int dbm, ret;

                ret = rdev_get_tx_power(rdev, wdev, &dbm);
                if (ret == 0 &&
                    nla_put_u32(msg, NL80211_ATTR_WIPHY_TX_POWER_LEVEL,
                                DBM_TO_MBM(dbm)))
                        goto nla_put_failure;
        }

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
                if (wdev->u.ap.ssid_len &&
                    nla_put(msg, NL80211_ATTR_SSID, wdev->u.ap.ssid_len,
                            wdev->u.ap.ssid))
                        goto nla_put_failure;
                break;
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                if (wdev->u.client.ssid_len &&
                    nla_put(msg, NL80211_ATTR_SSID, wdev->u.client.ssid_len,
                            wdev->u.client.ssid))
                        goto nla_put_failure;
                break;
        case NL80211_IFTYPE_ADHOC:
                if (wdev->u.ibss.ssid_len &&
                    nla_put(msg, NL80211_ATTR_SSID, wdev->u.ibss.ssid_len,
                            wdev->u.ibss.ssid))
                        goto nla_put_failure;
                break;
        default:
                /* nothing */
                break;
        }

        if (rdev->ops->get_txq_stats) {
                struct cfg80211_txq_stats txqstats = {};
                int ret = rdev_get_txq_stats(rdev, wdev, &txqstats);

                if (ret == 0 &&
                    !nl80211_put_txq_stats(msg, &txqstats,
                                           NL80211_ATTR_TXQ_STATS))
                        goto nla_put_failure;
        }

        if (wdev->valid_links) {
                unsigned int link_id;
                struct nlattr *links = nla_nest_start(msg,
                                                      NL80211_ATTR_MLO_LINKS);

                if (!links)
                        goto nla_put_failure;

                for_each_valid_link(wdev, link_id) {
                        struct nlattr *link = nla_nest_start(msg, link_id + 1);
                        struct cfg80211_chan_def chandef = {};
                        int ret;

                        if (!link)
                                goto nla_put_failure;

                        if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id))
                                goto nla_put_failure;
                        if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
                                    wdev->links[link_id].addr))
                                goto nla_put_failure;

                        ret = rdev_get_channel(rdev, wdev, link_id, &chandef);
                        if (ret == 0 && nl80211_send_chandef(msg, &chandef))
                                goto nla_put_failure;

                        nla_nest_end(msg, link);
                }

                nla_nest_end(msg, links);
        }

        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
{
        int wp_idx = 0;
        int if_idx = 0;
        int wp_start = cb->args[0];
        int if_start = cb->args[1];
        int filter_wiphy = -1;
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        int ret;

        rtnl_lock();
        if (!cb->args[2]) {
                struct nl80211_dump_wiphy_state state = {
                        .filter_wiphy = -1,
                };

                ret = nl80211_dump_wiphy_parse(skb, cb, &state);
                if (ret)
                        goto out_unlock;

                filter_wiphy = state.filter_wiphy;

                /*
                 * if filtering, set cb->args[2] to +1 since 0 is the default
                 * value needed to determine that parsing is necessary.
                 */
                if (filter_wiphy >= 0)
                        cb->args[2] = filter_wiphy + 1;
                else
                        cb->args[2] = -1;
        } else if (cb->args[2] > 0) {
                filter_wiphy = cb->args[2] - 1;
        }

        for_each_rdev(rdev) {
                if (!net_eq(wiphy_net(&rdev->wiphy), sock_net(skb->sk)))
                        continue;
                if (wp_idx < wp_start) {
                        wp_idx++;
                        continue;
                }

                if (filter_wiphy >= 0 && filter_wiphy != rdev->wiphy_idx)
                        continue;

                if_idx = 0;

                wiphy_lock(&rdev->wiphy);
                list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
                        if (if_idx < if_start) {
                                if_idx++;
                                continue;
                        }
                        if (nl80211_send_iface(skb, NETLINK_CB(cb->skb).portid,
                                               cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                               rdev, wdev,
                                               NL80211_CMD_NEW_INTERFACE) < 0) {
                                wiphy_unlock(&rdev->wiphy);
                                goto out;
                        }
                        if_idx++;
                }
                wiphy_unlock(&rdev->wiphy);

                if_start = 0;
                wp_idx++;
        }
 out:
        cb->args[0] = wp_idx;
        cb->args[1] = if_idx;

        ret = skb->len;
 out_unlock:
        rtnl_unlock();

        return ret;
}

static int nl80211_get_interface(struct sk_buff *skb, struct genl_info *info)
{
        struct sk_buff *msg;
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
                               rdev, wdev, NL80211_CMD_NEW_INTERFACE) < 0) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return genlmsg_reply(msg, info);
}

static const struct nla_policy mntr_flags_policy[NL80211_MNTR_FLAG_MAX + 1] = {
        [NL80211_MNTR_FLAG_FCSFAIL] = { .type = NLA_FLAG },
        [NL80211_MNTR_FLAG_PLCPFAIL] = { .type = NLA_FLAG },
        [NL80211_MNTR_FLAG_CONTROL] = { .type = NLA_FLAG },
        [NL80211_MNTR_FLAG_OTHER_BSS] = { .type = NLA_FLAG },
        [NL80211_MNTR_FLAG_COOK_FRAMES] = { .type = NLA_FLAG },
        [NL80211_MNTR_FLAG_ACTIVE] = { .type = NLA_FLAG },
};

static int parse_monitor_flags(struct nlattr *nla, u32 *mntrflags)
{
        struct nlattr *flags[NL80211_MNTR_FLAG_MAX + 1];
        int flag;

        *mntrflags = 0;

        if (!nla)
                return -EINVAL;

        if (nla_parse_nested_deprecated(flags, NL80211_MNTR_FLAG_MAX, nla, mntr_flags_policy, NULL))
                return -EINVAL;

        for (flag = 1; flag <= NL80211_MNTR_FLAG_MAX; flag++)
                if (flags[flag])
                        *mntrflags |= (1<<flag);

        *mntrflags |= MONITOR_FLAG_CHANGED;

        return 0;
}

static int nl80211_parse_mon_options(struct cfg80211_registered_device *rdev,
                                     enum nl80211_iftype type,
                                     struct genl_info *info,
                                     struct vif_params *params)
{
        bool change = false;
        int err;

        if (info->attrs[NL80211_ATTR_MNTR_FLAGS]) {
                if (type != NL80211_IFTYPE_MONITOR)
                        return -EINVAL;

                err = parse_monitor_flags(info->attrs[NL80211_ATTR_MNTR_FLAGS],
                                          &params->flags);
                if (err)
                        return err;

                change = true;
        }

        if (params->flags & MONITOR_FLAG_ACTIVE &&
            !(rdev->wiphy.features & NL80211_FEATURE_ACTIVE_MONITOR))
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]) {
                const u8 *mumimo_groups;
                u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;

                if (type != NL80211_IFTYPE_MONITOR)
                        return -EINVAL;

                if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
                        return -EOPNOTSUPP;

                mumimo_groups =
                        nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]);

                /* bits 0 and 63 are reserved and must be zero */
                if ((mumimo_groups[0] & BIT(0)) ||
                    (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(7)))
                        return -EINVAL;

                params->vht_mumimo_groups = mumimo_groups;
                change = true;
        }

        if (info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]) {
                u32 cap_flag = NL80211_EXT_FEATURE_MU_MIMO_AIR_SNIFFER;

                if (type != NL80211_IFTYPE_MONITOR)
                        return -EINVAL;

                if (!wiphy_ext_feature_isset(&rdev->wiphy, cap_flag))
                        return -EOPNOTSUPP;

                params->vht_mumimo_follow_addr =
                        nla_data(info->attrs[NL80211_ATTR_MU_MIMO_FOLLOW_MAC_ADDR]);
                change = true;
        }

        return change ? 1 : 0;
}

static int nl80211_valid_4addr(struct cfg80211_registered_device *rdev,
                               struct net_device *netdev, u8 use_4addr,
                               enum nl80211_iftype iftype)
{
        if (!use_4addr) {
                if (netdev && netif_is_bridge_port(netdev))
                        return -EBUSY;
                return 0;
        }

        switch (iftype) {
        case NL80211_IFTYPE_AP_VLAN:
                if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_AP)
                        return 0;
                break;
        case NL80211_IFTYPE_STATION:
                if (rdev->wiphy.flags & WIPHY_FLAG_4ADDR_STATION)
                        return 0;
                break;
        default:
                break;
        }

        return -EOPNOTSUPP;
}

static int nl80211_set_interface(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct vif_params params;
        int err;
        enum nl80211_iftype otype, ntype;
        struct net_device *dev = info->user_ptr[1];
        bool change = false;

        memset(&params, 0, sizeof(params));

        otype = ntype = dev->ieee80211_ptr->iftype;

        if (info->attrs[NL80211_ATTR_IFTYPE]) {
                ntype = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);
                if (otype != ntype)
                        change = true;
        }

        if (info->attrs[NL80211_ATTR_MESH_ID]) {
                struct wireless_dev *wdev = dev->ieee80211_ptr;

                if (ntype != NL80211_IFTYPE_MESH_POINT)
                        return -EINVAL;
                if (otype != NL80211_IFTYPE_MESH_POINT)
                        return -EINVAL;
                if (netif_running(dev))
                        return -EBUSY;

                wdev->u.mesh.id_up_len =
                        nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
                memcpy(wdev->u.mesh.id,
                       nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
                       wdev->u.mesh.id_up_len);
        }

        if (info->attrs[NL80211_ATTR_4ADDR]) {
                params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
                change = true;
                err = nl80211_valid_4addr(rdev, dev, params.use_4addr, ntype);
                if (err)
                        return err;
        } else {
                params.use_4addr = -1;
        }

        err = nl80211_parse_mon_options(rdev, ntype, info, &params);
        if (err < 0)
                return err;
        if (err > 0)
                change = true;

        if (change)
                err = cfg80211_change_iface(rdev, dev, ntype, &params);
        else
                err = 0;

        if (!err && params.use_4addr != -1)
                dev->ieee80211_ptr->use_4addr = params.use_4addr;

        if (change && !err) {
                struct wireless_dev *wdev = dev->ieee80211_ptr;

                nl80211_notify_iface(rdev, wdev, NL80211_CMD_SET_INTERFACE);
        }

        return err;
}

static int _nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct vif_params params;
        struct wireless_dev *wdev;
        struct sk_buff *msg;
        int err;
        enum nl80211_iftype type = NL80211_IFTYPE_UNSPECIFIED;

        memset(&params, 0, sizeof(params));

        if (!info->attrs[NL80211_ATTR_IFNAME])
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_IFTYPE])
                type = nla_get_u32(info->attrs[NL80211_ATTR_IFTYPE]);

        if (!rdev->ops->add_virtual_intf)
                return -EOPNOTSUPP;

        if ((type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN ||
             rdev->wiphy.features & NL80211_FEATURE_MAC_ON_CREATE) &&
            info->attrs[NL80211_ATTR_MAC]) {
                nla_memcpy(params.macaddr, info->attrs[NL80211_ATTR_MAC],
                           ETH_ALEN);
                if (!is_valid_ether_addr(params.macaddr))
                        return -EADDRNOTAVAIL;
        }

        if (info->attrs[NL80211_ATTR_4ADDR]) {
                params.use_4addr = !!nla_get_u8(info->attrs[NL80211_ATTR_4ADDR]);
                err = nl80211_valid_4addr(rdev, NULL, params.use_4addr, type);
                if (err)
                        return err;
        }

        if (!cfg80211_iftype_allowed(&rdev->wiphy, type, params.use_4addr, 0))
                return -EOPNOTSUPP;

        err = nl80211_parse_mon_options(rdev, type, info, &params);
        if (err < 0)
                return err;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        wdev = rdev_add_virtual_intf(rdev,
                                nla_data(info->attrs[NL80211_ATTR_IFNAME]),
                                NET_NAME_USER, type, &params);
        if (WARN_ON(!wdev)) {
                nlmsg_free(msg);
                return -EPROTO;
        } else if (IS_ERR(wdev)) {
                nlmsg_free(msg);
                return PTR_ERR(wdev);
        }

        if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
                wdev->owner_nlportid = info->snd_portid;

        switch (type) {
        case NL80211_IFTYPE_MESH_POINT:
                if (!info->attrs[NL80211_ATTR_MESH_ID])
                        break;
                wdev->u.mesh.id_up_len =
                        nla_len(info->attrs[NL80211_ATTR_MESH_ID]);
                memcpy(wdev->u.mesh.id,
                       nla_data(info->attrs[NL80211_ATTR_MESH_ID]),
                       wdev->u.mesh.id_up_len);
                break;
        case NL80211_IFTYPE_NAN:
        case NL80211_IFTYPE_P2P_DEVICE:
                /*
                 * P2P Device and NAN do not have a netdev, so don't go
                 * through the netdev notifier and must be added here
                 */
                cfg80211_init_wdev(wdev);
                cfg80211_register_wdev(rdev, wdev);
                break;
        default:
                break;
        }

        if (nl80211_send_iface(msg, info->snd_portid, info->snd_seq, 0,
                               rdev, wdev, NL80211_CMD_NEW_INTERFACE) < 0) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return genlmsg_reply(msg, info);
}

static int nl80211_new_interface(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int ret;

        /* to avoid failing a new interface creation due to pending removal */
        cfg80211_destroy_ifaces(rdev);

        wiphy_lock(&rdev->wiphy);
        ret = _nl80211_new_interface(skb, info);
        wiphy_unlock(&rdev->wiphy);

        return ret;
}

static int nl80211_del_interface(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];

        if (!rdev->ops->del_virtual_intf)
                return -EOPNOTSUPP;

        /*
         * We hold RTNL, so this is safe, without RTNL opencount cannot
         * reach 0, and thus the rdev cannot be deleted.
         *
         * We need to do it for the dev_close(), since that will call
         * the netdev notifiers, and we need to acquire the mutex there
         * but don't know if we get there from here or from some other
         * place (e.g. "ip link set ... down").
         */
        mutex_unlock(&rdev->wiphy.mtx);

        /*
         * If we remove a wireless device without a netdev then clear
         * user_ptr[1] so that nl80211_post_doit won't dereference it
         * to check if it needs to do dev_put(). Otherwise it crashes
         * since the wdev has been freed, unlike with a netdev where
         * we need the dev_put() for the netdev to really be freed.
         */
        if (!wdev->netdev)
                info->user_ptr[1] = NULL;
        else
                dev_close(wdev->netdev);

        mutex_lock(&rdev->wiphy.mtx);

        return cfg80211_remove_virtual_intf(rdev, wdev);
}

static int nl80211_set_noack_map(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        u16 noack_map;

        if (!info->attrs[NL80211_ATTR_NOACK_MAP])
                return -EINVAL;

        if (!rdev->ops->set_noack_map)
                return -EOPNOTSUPP;

        noack_map = nla_get_u16(info->attrs[NL80211_ATTR_NOACK_MAP]);

        return rdev_set_noack_map(rdev, dev, noack_map);
}

static int nl80211_validate_key_link_id(struct genl_info *info,
                                        struct wireless_dev *wdev,
                                        int link_id, bool pairwise)
{
        if (pairwise) {
                if (link_id != -1) {
                        GENL_SET_ERR_MSG(info,
                                         "link ID not allowed for pairwise key");
                        return -EINVAL;
                }

                return 0;
        }

        if (wdev->valid_links) {
                if (link_id == -1) {
                        GENL_SET_ERR_MSG(info,
                                         "link ID must for MLO group key");
                        return -EINVAL;
                }
                if (!(wdev->valid_links & BIT(link_id))) {
                        GENL_SET_ERR_MSG(info, "invalid link ID for MLO group key");
                        return -EINVAL;
                }
        } else if (link_id != -1) {
                GENL_SET_ERR_MSG(info, "link ID not allowed for non-MLO group key");
                return -EINVAL;
        }

        return 0;
}

struct get_key_cookie {
        struct sk_buff *msg;
        int error;
        int idx;
};

static void get_key_callback(void *c, struct key_params *params)
{
        struct nlattr *key;
        struct get_key_cookie *cookie = c;

        if ((params->seq &&
             nla_put(cookie->msg, NL80211_ATTR_KEY_SEQ,
                     params->seq_len, params->seq)) ||
            (params->cipher &&
             nla_put_u32(cookie->msg, NL80211_ATTR_KEY_CIPHER,
                         params->cipher)))
                goto nla_put_failure;

        key = nla_nest_start_noflag(cookie->msg, NL80211_ATTR_KEY);
        if (!key)
                goto nla_put_failure;

        if ((params->seq &&
             nla_put(cookie->msg, NL80211_KEY_SEQ,
                     params->seq_len, params->seq)) ||
            (params->cipher &&
             nla_put_u32(cookie->msg, NL80211_KEY_CIPHER,
                         params->cipher)))
                goto nla_put_failure;

        if (nla_put_u8(cookie->msg, NL80211_KEY_IDX, cookie->idx))
                goto nla_put_failure;

        nla_nest_end(cookie->msg, key);

        return;
 nla_put_failure:
        cookie->error = 1;
}

static int nl80211_get_key(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int err;
        struct net_device *dev = info->user_ptr[1];
        u8 key_idx = 0;
        const u8 *mac_addr = NULL;
        bool pairwise;
        struct get_key_cookie cookie = {
                .error = 0,
        };
        void *hdr;
        struct sk_buff *msg;
        bool bigtk_support = false;
        int link_id = nl80211_link_id_or_invalid(info->attrs);
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        if (wiphy_ext_feature_isset(&rdev->wiphy,
                                    NL80211_EXT_FEATURE_BEACON_PROTECTION))
                bigtk_support = true;

        if ((wdev->iftype == NL80211_IFTYPE_STATION ||
             wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
            wiphy_ext_feature_isset(&rdev->wiphy,
                                    NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT))
                bigtk_support = true;

        if (info->attrs[NL80211_ATTR_KEY_IDX]) {
                key_idx = nla_get_u8(info->attrs[NL80211_ATTR_KEY_IDX]);

                if (key_idx >= 6 && key_idx <= 7 && !bigtk_support) {
                        GENL_SET_ERR_MSG(info, "BIGTK not supported");
                        return -EINVAL;
                }
        }

        if (info->attrs[NL80211_ATTR_MAC])
                mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        pairwise = !!mac_addr;
        if (info->attrs[NL80211_ATTR_KEY_TYPE]) {
                u32 kt = nla_get_u32(info->attrs[NL80211_ATTR_KEY_TYPE]);

                if (kt != NL80211_KEYTYPE_GROUP &&
                    kt != NL80211_KEYTYPE_PAIRWISE)
                        return -EINVAL;
                pairwise = kt == NL80211_KEYTYPE_PAIRWISE;
        }

        if (!rdev->ops->get_key)
                return -EOPNOTSUPP;

        if (!pairwise && mac_addr && !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
                return -ENOENT;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_NEW_KEY);
        if (!hdr)
                goto nla_put_failure;

        cookie.msg = msg;
        cookie.idx = key_idx;

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
                goto nla_put_failure;
        if (mac_addr &&
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr))
                goto nla_put_failure;

        err = nl80211_validate_key_link_id(info, wdev, link_id, pairwise);
        if (err)
                goto free_msg;

        err = rdev_get_key(rdev, dev, link_id, key_idx, pairwise, mac_addr,
                           &cookie, get_key_callback);

        if (err)
                goto free_msg;

        if (cookie.error)
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

 nla_put_failure:
        err = -ENOBUFS;
 free_msg:
        nlmsg_free(msg);
        return err;
}

static int nl80211_set_key(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct key_parse key;
        int err;
        struct net_device *dev = info->user_ptr[1];
        int link_id = nl80211_link_id_or_invalid(info->attrs);
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        err = nl80211_parse_key(info, &key);
        if (err)
                return err;

        if (key.idx < 0)
                return -EINVAL;

        /* Only support setting default key and
         * Extended Key ID action NL80211_KEY_SET_TX.
         */
        if (!key.def && !key.defmgmt && !key.defbeacon &&
            !(key.p.mode == NL80211_KEY_SET_TX))
                return -EINVAL;

        if (key.def) {
                if (!rdev->ops->set_default_key)
                        return -EOPNOTSUPP;

                err = nl80211_key_allowed(wdev);
                if (err)
                        return err;

                err = nl80211_validate_key_link_id(info, wdev, link_id, false);
                if (err)
                        return err;

                err = rdev_set_default_key(rdev, dev, link_id, key.idx,
                                           key.def_uni, key.def_multi);

                if (err)
                        return err;

#ifdef CONFIG_CFG80211_WEXT
                wdev->wext.default_key = key.idx;
#endif
                return 0;
        } else if (key.defmgmt) {
                if (key.def_uni || !key.def_multi)
                        return -EINVAL;

                if (!rdev->ops->set_default_mgmt_key)
                        return -EOPNOTSUPP;

                err = nl80211_key_allowed(wdev);
                if (err)
                        return err;

                err = nl80211_validate_key_link_id(info, wdev, link_id, false);
                if (err)
                        return err;

                err = rdev_set_default_mgmt_key(rdev, dev, link_id, key.idx);
                if (err)
                        return err;

#ifdef CONFIG_CFG80211_WEXT
                wdev->wext.default_mgmt_key = key.idx;
#endif
                return 0;
        } else if (key.defbeacon) {
                if (key.def_uni || !key.def_multi)
                        return -EINVAL;

                if (!rdev->ops->set_default_beacon_key)
                        return -EOPNOTSUPP;

                err = nl80211_key_allowed(wdev);
                if (err)
                        return err;

                err = nl80211_validate_key_link_id(info, wdev, link_id, false);
                if (err)
                        return err;

                return rdev_set_default_beacon_key(rdev, dev, link_id, key.idx);
        } else if (key.p.mode == NL80211_KEY_SET_TX &&
                   wiphy_ext_feature_isset(&rdev->wiphy,
                                           NL80211_EXT_FEATURE_EXT_KEY_ID)) {
                u8 *mac_addr = NULL;

                if (info->attrs[NL80211_ATTR_MAC])
                        mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

                if (!mac_addr || key.idx < 0 || key.idx > 1)
                        return -EINVAL;

                err = nl80211_validate_key_link_id(info, wdev, link_id, true);
                if (err)
                        return err;

                return rdev_add_key(rdev, dev, link_id, key.idx,
                                    NL80211_KEYTYPE_PAIRWISE,
                                    mac_addr, &key.p);
        }

        return -EINVAL;
}

static int nl80211_new_key(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int err;
        struct net_device *dev = info->user_ptr[1];
        struct key_parse key;
        const u8 *mac_addr = NULL;
        int link_id = nl80211_link_id_or_invalid(info->attrs);
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        err = nl80211_parse_key(info, &key);
        if (err)
                return err;

        if (!key.p.key) {
                GENL_SET_ERR_MSG(info, "no key");
                return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_MAC])
                mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (key.type == -1) {
                if (mac_addr)
                        key.type = NL80211_KEYTYPE_PAIRWISE;
                else
                        key.type = NL80211_KEYTYPE_GROUP;
        }

        /* for now */
        if (key.type != NL80211_KEYTYPE_PAIRWISE &&
            key.type != NL80211_KEYTYPE_GROUP) {
                GENL_SET_ERR_MSG(info, "key type not pairwise or group");
                return -EINVAL;
        }

        if (key.type == NL80211_KEYTYPE_GROUP &&
            info->attrs[NL80211_ATTR_VLAN_ID])
                key.p.vlan_id = nla_get_u16(info->attrs[NL80211_ATTR_VLAN_ID]);

        if (!rdev->ops->add_key)
                return -EOPNOTSUPP;

        if (cfg80211_validate_key_settings(rdev, &key.p, key.idx,
                                           key.type == NL80211_KEYTYPE_PAIRWISE,
                                           mac_addr)) {
                GENL_SET_ERR_MSG(info, "key setting validation failed");
                return -EINVAL;
        }

        err = nl80211_key_allowed(wdev);
        if (err)
                GENL_SET_ERR_MSG(info, "key not allowed");

        if (!err)
                err = nl80211_validate_key_link_id(info, wdev, link_id,
                                key.type == NL80211_KEYTYPE_PAIRWISE);

        if (!err) {
                err = rdev_add_key(rdev, dev, link_id, key.idx,
                                   key.type == NL80211_KEYTYPE_PAIRWISE,
                                    mac_addr, &key.p);
                if (err)
                        GENL_SET_ERR_MSG(info, "key addition failed");
        }

        return err;
}

static int nl80211_del_key(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int err;
        struct net_device *dev = info->user_ptr[1];
        u8 *mac_addr = NULL;
        struct key_parse key;
        int link_id = nl80211_link_id_or_invalid(info->attrs);
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        err = nl80211_parse_key(info, &key);
        if (err)
                return err;

        if (info->attrs[NL80211_ATTR_MAC])
                mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (key.type == -1) {
                if (mac_addr)
                        key.type = NL80211_KEYTYPE_PAIRWISE;
                else
                        key.type = NL80211_KEYTYPE_GROUP;
        }

        /* for now */
        if (key.type != NL80211_KEYTYPE_PAIRWISE &&
            key.type != NL80211_KEYTYPE_GROUP)
                return -EINVAL;

        if (!cfg80211_valid_key_idx(rdev, key.idx,
                                    key.type == NL80211_KEYTYPE_PAIRWISE))
                return -EINVAL;

        if (!rdev->ops->del_key)
                return -EOPNOTSUPP;

        err = nl80211_key_allowed(wdev);

        if (key.type == NL80211_KEYTYPE_GROUP && mac_addr &&
            !(rdev->wiphy.flags & WIPHY_FLAG_IBSS_RSN))
                err = -ENOENT;

        if (!err)
                err = nl80211_validate_key_link_id(info, wdev, link_id,
                                key.type == NL80211_KEYTYPE_PAIRWISE);

        if (!err)
                err = rdev_del_key(rdev, dev, link_id, key.idx,
                                   key.type == NL80211_KEYTYPE_PAIRWISE,
                                   mac_addr);

#ifdef CONFIG_CFG80211_WEXT
        if (!err) {
                if (key.idx == wdev->wext.default_key)
                        wdev->wext.default_key = -1;
                else if (key.idx == wdev->wext.default_mgmt_key)
                        wdev->wext.default_mgmt_key = -1;
        }
#endif

        return err;
}

/* This function returns an error or the number of nested attributes */
static int validate_acl_mac_addrs(struct nlattr *nl_attr)
{
        struct nlattr *attr;
        int n_entries = 0, tmp;

        nla_for_each_nested(attr, nl_attr, tmp) {
                if (nla_len(attr) != ETH_ALEN)
                        return -EINVAL;

                n_entries++;
        }

        return n_entries;
}

/*
 * This function parses ACL information and allocates memory for ACL data.
 * On successful return, the calling function is responsible to free the
 * ACL buffer returned by this function.
 */
static struct cfg80211_acl_data *parse_acl_data(struct wiphy *wiphy,
                                                struct genl_info *info)
{
        enum nl80211_acl_policy acl_policy;
        struct nlattr *attr;
        struct cfg80211_acl_data *acl;
        int i = 0, n_entries, tmp;

        if (!wiphy->max_acl_mac_addrs)
                return ERR_PTR(-EOPNOTSUPP);

        if (!info->attrs[NL80211_ATTR_ACL_POLICY])
                return ERR_PTR(-EINVAL);

        acl_policy = nla_get_u32(info->attrs[NL80211_ATTR_ACL_POLICY]);
        if (acl_policy != NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED &&
            acl_policy != NL80211_ACL_POLICY_DENY_UNLESS_LISTED)
                return ERR_PTR(-EINVAL);

        if (!info->attrs[NL80211_ATTR_MAC_ADDRS])
                return ERR_PTR(-EINVAL);

        n_entries = validate_acl_mac_addrs(info->attrs[NL80211_ATTR_MAC_ADDRS]);
        if (n_entries < 0)
                return ERR_PTR(n_entries);

        if (n_entries > wiphy->max_acl_mac_addrs)
                return ERR_PTR(-EOPNOTSUPP);

        acl = kzalloc(struct_size(acl, mac_addrs, n_entries), GFP_KERNEL);
        if (!acl)
                return ERR_PTR(-ENOMEM);
        acl->n_acl_entries = n_entries;

        nla_for_each_nested(attr, info->attrs[NL80211_ATTR_MAC_ADDRS], tmp) {
                memcpy(acl->mac_addrs[i].addr, nla_data(attr), ETH_ALEN);
                i++;
        }
        acl->acl_policy = acl_policy;

        return acl;
}

static int nl80211_set_mac_acl(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_acl_data *acl;
        int err;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                return -EOPNOTSUPP;

        if (!dev->ieee80211_ptr->links[0].ap.beacon_interval)
                return -EINVAL;

        acl = parse_acl_data(&rdev->wiphy, info);
        if (IS_ERR(acl))
                return PTR_ERR(acl);

        err = rdev_set_mac_acl(rdev, dev, acl);

        kfree(acl);

        return err;
}

static u32 rateset_to_mask(struct ieee80211_supported_band *sband,
                           u8 *rates, u8 rates_len)
{
        u8 i;
        u32 mask = 0;

        for (i = 0; i < rates_len; i++) {
                int rate = (rates[i] & 0x7f) * 5;
                int ridx;

                for (ridx = 0; ridx < sband->n_bitrates; ridx++) {
                        struct ieee80211_rate *srate =
                                &sband->bitrates[ridx];
                        if (rate == srate->bitrate) {
                                mask |= 1 << ridx;
                                break;
                        }
                }
                if (ridx == sband->n_bitrates)
                        return 0; /* rate not found */
        }

        return mask;
}

static bool ht_rateset_to_mask(struct ieee80211_supported_band *sband,
                               u8 *rates, u8 rates_len,
                               u8 mcs[IEEE80211_HT_MCS_MASK_LEN])
{
        u8 i;

        memset(mcs, 0, IEEE80211_HT_MCS_MASK_LEN);

        for (i = 0; i < rates_len; i++) {
                int ridx, rbit;

                ridx = rates[i] / 8;
                rbit = BIT(rates[i] % 8);

                /* check validity */
                if ((ridx < 0) || (ridx >= IEEE80211_HT_MCS_MASK_LEN))
                        return false;

                /* check availability */
                ridx = array_index_nospec(ridx, IEEE80211_HT_MCS_MASK_LEN);
                if (sband->ht_cap.mcs.rx_mask[ridx] & rbit)
                        mcs[ridx] |= rbit;
                else
                        return false;
        }

        return true;
}

static u16 vht_mcs_map_to_mcs_mask(u8 vht_mcs_map)
{
        u16 mcs_mask = 0;

        switch (vht_mcs_map) {
        case IEEE80211_VHT_MCS_NOT_SUPPORTED:
                break;
        case IEEE80211_VHT_MCS_SUPPORT_0_7:
                mcs_mask = 0x00FF;
                break;
        case IEEE80211_VHT_MCS_SUPPORT_0_8:
                mcs_mask = 0x01FF;
                break;
        case IEEE80211_VHT_MCS_SUPPORT_0_9:
                mcs_mask = 0x03FF;
                break;
        default:
                break;
        }

        return mcs_mask;
}

static void vht_build_mcs_mask(u16 vht_mcs_map,
                               u16 vht_mcs_mask[NL80211_VHT_NSS_MAX])
{
        u8 nss;

        for (nss = 0; nss < NL80211_VHT_NSS_MAX; nss++) {
                vht_mcs_mask[nss] = vht_mcs_map_to_mcs_mask(vht_mcs_map & 0x03);
                vht_mcs_map >>= 2;
        }
}

static bool vht_set_mcs_mask(struct ieee80211_supported_band *sband,
                             struct nl80211_txrate_vht *txrate,
                             u16 mcs[NL80211_VHT_NSS_MAX])
{
        u16 tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
        u16 tx_mcs_mask[NL80211_VHT_NSS_MAX] = {};
        u8 i;

        if (!sband->vht_cap.vht_supported)
                return false;

        memset(mcs, 0, sizeof(u16) * NL80211_VHT_NSS_MAX);

        /* Build vht_mcs_mask from VHT capabilities */
        vht_build_mcs_mask(tx_mcs_map, tx_mcs_mask);

        for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
                if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
                        mcs[i] = txrate->mcs[i];
                else
                        return false;
        }

        return true;
}

static u16 he_mcs_map_to_mcs_mask(u8 he_mcs_map)
{
        switch (he_mcs_map) {
        case IEEE80211_HE_MCS_NOT_SUPPORTED:
                return 0;
        case IEEE80211_HE_MCS_SUPPORT_0_7:
                return 0x00FF;
        case IEEE80211_HE_MCS_SUPPORT_0_9:
                return 0x03FF;
        case IEEE80211_HE_MCS_SUPPORT_0_11:
                return 0xFFF;
        default:
                break;
        }
        return 0;
}

static void he_build_mcs_mask(u16 he_mcs_map,
                              u16 he_mcs_mask[NL80211_HE_NSS_MAX])
{
        u8 nss;

        for (nss = 0; nss < NL80211_HE_NSS_MAX; nss++) {
                he_mcs_mask[nss] = he_mcs_map_to_mcs_mask(he_mcs_map & 0x03);
                he_mcs_map >>= 2;
        }
}

static u16 he_get_txmcsmap(struct genl_info *info, unsigned int link_id,
                           const struct ieee80211_sta_he_cap *he_cap)
{
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_chan_def *chandef;
        __le16 tx_mcs;

        chandef = wdev_chandef(wdev, link_id);
        if (!chandef) {
                /*
                 * This is probably broken, but we never maintained
                 * a chandef in these cases, so it always was.
                 */
                return le16_to_cpu(he_cap->he_mcs_nss_supp.tx_mcs_80);
        }

        switch (chandef->width) {
        case NL80211_CHAN_WIDTH_80P80:
                tx_mcs = he_cap->he_mcs_nss_supp.tx_mcs_80p80;
                break;
        case NL80211_CHAN_WIDTH_160:
                tx_mcs = he_cap->he_mcs_nss_supp.tx_mcs_160;
                break;
        default:
                tx_mcs = he_cap->he_mcs_nss_supp.tx_mcs_80;
                break;
        }

        return le16_to_cpu(tx_mcs);
}

static bool he_set_mcs_mask(struct genl_info *info,
                            struct wireless_dev *wdev,
                            struct ieee80211_supported_band *sband,
                            struct nl80211_txrate_he *txrate,
                            u16 mcs[NL80211_HE_NSS_MAX],
                            unsigned int link_id)
{
        const struct ieee80211_sta_he_cap *he_cap;
        u16 tx_mcs_mask[NL80211_HE_NSS_MAX] = {};
        u16 tx_mcs_map = 0;
        u8 i;

        he_cap = ieee80211_get_he_iftype_cap(sband, wdev->iftype);
        if (!he_cap)
                return false;

        memset(mcs, 0, sizeof(u16) * NL80211_HE_NSS_MAX);

        tx_mcs_map = he_get_txmcsmap(info, link_id, he_cap);

        /* Build he_mcs_mask from HE capabilities */
        he_build_mcs_mask(tx_mcs_map, tx_mcs_mask);

        for (i = 0; i < NL80211_HE_NSS_MAX; i++) {
                if ((tx_mcs_mask[i] & txrate->mcs[i]) == txrate->mcs[i])
                        mcs[i] = txrate->mcs[i];
                else
                        return false;
        }

        return true;
}

static int nl80211_parse_tx_bitrate_mask(struct genl_info *info,
                                         struct nlattr *attrs[],
                                         enum nl80211_attrs attr,
                                         struct cfg80211_bitrate_mask *mask,
                                         struct net_device *dev,
                                         bool default_all_enabled,
                                         unsigned int link_id)
{
        struct nlattr *tb[NL80211_TXRATE_MAX + 1];
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        int rem, i;
        struct nlattr *tx_rates;
        struct ieee80211_supported_band *sband;
        u16 vht_tx_mcs_map, he_tx_mcs_map;

        memset(mask, 0, sizeof(*mask));
        /* Default to all rates enabled */
        for (i = 0; i < NUM_NL80211_BANDS; i++) {
                const struct ieee80211_sta_he_cap *he_cap;

                if (!default_all_enabled)
                        break;

                sband = rdev->wiphy.bands[i];

                if (!sband)
                        continue;

                mask->control[i].legacy = (1 << sband->n_bitrates) - 1;
                memcpy(mask->control[i].ht_mcs,
                       sband->ht_cap.mcs.rx_mask,
                       sizeof(mask->control[i].ht_mcs));

                if (sband->vht_cap.vht_supported) {
                        vht_tx_mcs_map = le16_to_cpu(sband->vht_cap.vht_mcs.tx_mcs_map);
                        vht_build_mcs_mask(vht_tx_mcs_map, mask->control[i].vht_mcs);
                }

                he_cap = ieee80211_get_he_iftype_cap(sband, wdev->iftype);
                if (!he_cap)
                        continue;

                he_tx_mcs_map = he_get_txmcsmap(info, link_id, he_cap);
                he_build_mcs_mask(he_tx_mcs_map, mask->control[i].he_mcs);

                mask->control[i].he_gi = 0xFF;
                mask->control[i].he_ltf = 0xFF;
        }

        /* if no rates are given set it back to the defaults */
        if (!attrs[attr])
                goto out;

        /* The nested attribute uses enum nl80211_band as the index. This maps
         * directly to the enum nl80211_band values used in cfg80211.
         */
        BUILD_BUG_ON(NL80211_MAX_SUPP_HT_RATES > IEEE80211_HT_MCS_MASK_LEN * 8);
        nla_for_each_nested(tx_rates, attrs[attr], rem) {
                enum nl80211_band band = nla_type(tx_rates);
                int err;

                if (band < 0 || band >= NUM_NL80211_BANDS)
                        return -EINVAL;
                sband = rdev->wiphy.bands[band];
                if (sband == NULL)
                        return -EINVAL;
                err = nla_parse_nested_deprecated(tb, NL80211_TXRATE_MAX,
                                                  tx_rates,
                                                  nl80211_txattr_policy,
                                                  info->extack);
                if (err)
                        return err;
                if (tb[NL80211_TXRATE_LEGACY]) {
                        mask->control[band].legacy = rateset_to_mask(
                                sband,
                                nla_data(tb[NL80211_TXRATE_LEGACY]),
                                nla_len(tb[NL80211_TXRATE_LEGACY]));
                        if ((mask->control[band].legacy == 0) &&
                            nla_len(tb[NL80211_TXRATE_LEGACY]))
                                return -EINVAL;
                }
                if (tb[NL80211_TXRATE_HT]) {
                        if (!ht_rateset_to_mask(
                                        sband,
                                        nla_data(tb[NL80211_TXRATE_HT]),
                                        nla_len(tb[NL80211_TXRATE_HT]),
                                        mask->control[band].ht_mcs))
                                return -EINVAL;
                }

                if (tb[NL80211_TXRATE_VHT]) {
                        if (!vht_set_mcs_mask(
                                        sband,
                                        nla_data(tb[NL80211_TXRATE_VHT]),
                                        mask->control[band].vht_mcs))
                                return -EINVAL;
                }

                if (tb[NL80211_TXRATE_GI]) {
                        mask->control[band].gi =
                                nla_get_u8(tb[NL80211_TXRATE_GI]);
                        if (mask->control[band].gi > NL80211_TXRATE_FORCE_LGI)
                                return -EINVAL;
                }
                if (tb[NL80211_TXRATE_HE] &&
                    !he_set_mcs_mask(info, wdev, sband,
                                     nla_data(tb[NL80211_TXRATE_HE]),
                                     mask->control[band].he_mcs,
                                     link_id))
                        return -EINVAL;

                if (tb[NL80211_TXRATE_HE_GI])
                        mask->control[band].he_gi =
                                nla_get_u8(tb[NL80211_TXRATE_HE_GI]);
                if (tb[NL80211_TXRATE_HE_LTF])
                        mask->control[band].he_ltf =
                                nla_get_u8(tb[NL80211_TXRATE_HE_LTF]);

                if (mask->control[band].legacy == 0) {
                        /* don't allow empty legacy rates if HT, VHT or HE
                         * are not even supported.
                         */
                        if (!(rdev->wiphy.bands[band]->ht_cap.ht_supported ||
                              rdev->wiphy.bands[band]->vht_cap.vht_supported ||
                              ieee80211_get_he_iftype_cap(sband, wdev->iftype)))
                                return -EINVAL;

                        for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++)
                                if (mask->control[band].ht_mcs[i])
                                        goto out;

                        for (i = 0; i < NL80211_VHT_NSS_MAX; i++)
                                if (mask->control[band].vht_mcs[i])
                                        goto out;

                        for (i = 0; i < NL80211_HE_NSS_MAX; i++)
                                if (mask->control[band].he_mcs[i])
                                        goto out;

                        /* legacy and mcs rates may not be both empty */
                        return -EINVAL;
                }
        }

out:
        return 0;
}

static int validate_beacon_tx_rate(struct cfg80211_registered_device *rdev,
                                   enum nl80211_band band,
                                   struct cfg80211_bitrate_mask *beacon_rate)
{
        u32 count_ht, count_vht, count_he, i;
        u32 rate = beacon_rate->control[band].legacy;

        /* Allow only one rate */
        if (hweight32(rate) > 1)
                return -EINVAL;

        count_ht = 0;
        for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
                if (hweight8(beacon_rate->control[band].ht_mcs[i]) > 1) {
                        return -EINVAL;
                } else if (beacon_rate->control[band].ht_mcs[i]) {
                        count_ht++;
                        if (count_ht > 1)
                                return -EINVAL;
                }
                if (count_ht && rate)
                        return -EINVAL;
        }

        count_vht = 0;
        for (i = 0; i < NL80211_VHT_NSS_MAX; i++) {
                if (hweight16(beacon_rate->control[band].vht_mcs[i]) > 1) {
                        return -EINVAL;
                } else if (beacon_rate->control[band].vht_mcs[i]) {
                        count_vht++;
                        if (count_vht > 1)
                                return -EINVAL;
                }
                if (count_vht && rate)
                        return -EINVAL;
        }

        count_he = 0;
        for (i = 0; i < NL80211_HE_NSS_MAX; i++) {
                if (hweight16(beacon_rate->control[band].he_mcs[i]) > 1) {
                        return -EINVAL;
                } else if (beacon_rate->control[band].he_mcs[i]) {
                        count_he++;
                        if (count_he > 1)
                                return -EINVAL;
                }
                if (count_he && rate)
                        return -EINVAL;
        }

        if ((count_ht && count_vht && count_he) ||
            (!rate && !count_ht && !count_vht && !count_he))
                return -EINVAL;

        if (rate &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_BEACON_RATE_LEGACY))
                return -EINVAL;
        if (count_ht &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_BEACON_RATE_HT))
                return -EINVAL;
        if (count_vht &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_BEACON_RATE_VHT))
                return -EINVAL;
        if (count_he &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_BEACON_RATE_HE))
                return -EINVAL;

        return 0;
}

static int nl80211_parse_mbssid_config(struct wiphy *wiphy,
                                       struct net_device *dev,
                                       struct nlattr *attrs,
                                       struct cfg80211_mbssid_config *config,
                                       u8 num_elems)
{
        struct nlattr *tb[NL80211_MBSSID_CONFIG_ATTR_MAX + 1];

        if (!wiphy->mbssid_max_interfaces)
                return -EOPNOTSUPP;

        if (nla_parse_nested(tb, NL80211_MBSSID_CONFIG_ATTR_MAX, attrs, NULL,
                             NULL) ||
            !tb[NL80211_MBSSID_CONFIG_ATTR_INDEX])
                return -EINVAL;

        config->ema = nla_get_flag(tb[NL80211_MBSSID_CONFIG_ATTR_EMA]);
        if (config->ema) {
                if (!wiphy->ema_max_profile_periodicity)
                        return -EOPNOTSUPP;

                if (num_elems > wiphy->ema_max_profile_periodicity)
                        return -EINVAL;
        }

        config->index = nla_get_u8(tb[NL80211_MBSSID_CONFIG_ATTR_INDEX]);
        if (config->index >= wiphy->mbssid_max_interfaces ||
            (!config->index && !num_elems))
                return -EINVAL;

        if (tb[NL80211_MBSSID_CONFIG_ATTR_TX_IFINDEX]) {
                u32 tx_ifindex =
                        nla_get_u32(tb[NL80211_MBSSID_CONFIG_ATTR_TX_IFINDEX]);

                if ((!config->index && tx_ifindex != dev->ifindex) ||
                    (config->index && tx_ifindex == dev->ifindex))
                        return -EINVAL;

                if (tx_ifindex != dev->ifindex) {
                        struct net_device *tx_netdev =
                                dev_get_by_index(wiphy_net(wiphy), tx_ifindex);

                        if (!tx_netdev || !tx_netdev->ieee80211_ptr ||
                            tx_netdev->ieee80211_ptr->wiphy != wiphy ||
                            tx_netdev->ieee80211_ptr->iftype !=
                                                        NL80211_IFTYPE_AP) {
                                dev_put(tx_netdev);
                                return -EINVAL;
                        }

                        config->tx_wdev = tx_netdev->ieee80211_ptr;
                } else {
                        config->tx_wdev = dev->ieee80211_ptr;
                }
        } else if (!config->index) {
                config->tx_wdev = dev->ieee80211_ptr;
        } else {
                return -EINVAL;
        }

        return 0;
}

static struct cfg80211_mbssid_elems *
nl80211_parse_mbssid_elems(struct wiphy *wiphy, struct nlattr *attrs)
{
        struct nlattr *nl_elems;
        struct cfg80211_mbssid_elems *elems;
        int rem_elems;
        u8 i = 0, num_elems = 0;

        if (!wiphy->mbssid_max_interfaces)
                return ERR_PTR(-EINVAL);

        nla_for_each_nested(nl_elems, attrs, rem_elems) {
                if (num_elems >= 255)
                        return ERR_PTR(-EINVAL);
                num_elems++;
        }

        elems = kzalloc(struct_size(elems, elem, num_elems), GFP_KERNEL);
        if (!elems)
                return ERR_PTR(-ENOMEM);
        elems->cnt = num_elems;

        nla_for_each_nested(nl_elems, attrs, rem_elems) {
                elems->elem[i].data = nla_data(nl_elems);
                elems->elem[i].len = nla_len(nl_elems);
                i++;
        }
        return elems;
}

static struct cfg80211_rnr_elems *
nl80211_parse_rnr_elems(struct wiphy *wiphy, struct nlattr *attrs,
                        struct netlink_ext_ack *extack)
{
        struct nlattr *nl_elems;
        struct cfg80211_rnr_elems *elems;
        int rem_elems;
        u8 i = 0, num_elems = 0;

        nla_for_each_nested(nl_elems, attrs, rem_elems) {
                int ret;

                ret = validate_ie_attr(nl_elems, extack);
                if (ret)
                        return ERR_PTR(ret);

                num_elems++;
        }

        elems = kzalloc(struct_size(elems, elem, num_elems), GFP_KERNEL);
        if (!elems)
                return ERR_PTR(-ENOMEM);
        elems->cnt = num_elems;

        nla_for_each_nested(nl_elems, attrs, rem_elems) {
                elems->elem[i].data = nla_data(nl_elems);
                elems->elem[i].len = nla_len(nl_elems);
                i++;
        }
        return elems;
}

static int nl80211_parse_he_bss_color(struct nlattr *attrs,
                                      struct cfg80211_he_bss_color *he_bss_color)
{
        struct nlattr *tb[NL80211_HE_BSS_COLOR_ATTR_MAX + 1];
        int err;

        err = nla_parse_nested(tb, NL80211_HE_BSS_COLOR_ATTR_MAX, attrs,
                               he_bss_color_policy, NULL);
        if (err)
                return err;

        if (!tb[NL80211_HE_BSS_COLOR_ATTR_COLOR])
                return -EINVAL;

        he_bss_color->color =
                nla_get_u8(tb[NL80211_HE_BSS_COLOR_ATTR_COLOR]);
        he_bss_color->enabled =
                !nla_get_flag(tb[NL80211_HE_BSS_COLOR_ATTR_DISABLED]);
        he_bss_color->partial =
                nla_get_flag(tb[NL80211_HE_BSS_COLOR_ATTR_PARTIAL]);

        return 0;
}

static int nl80211_parse_beacon(struct cfg80211_registered_device *rdev,
                                struct nlattr *attrs[],
                                struct cfg80211_beacon_data *bcn,
                                struct netlink_ext_ack *extack)
{
        bool haveinfo = false;
        int err;

        memset(bcn, 0, sizeof(*bcn));

        bcn->link_id = nl80211_link_id(attrs);

        if (attrs[NL80211_ATTR_BEACON_HEAD]) {
                bcn->head = nla_data(attrs[NL80211_ATTR_BEACON_HEAD]);
                bcn->head_len = nla_len(attrs[NL80211_ATTR_BEACON_HEAD]);
                if (!bcn->head_len)
                        return -EINVAL;
                haveinfo = true;
        }

        if (attrs[NL80211_ATTR_BEACON_TAIL]) {
                bcn->tail = nla_data(attrs[NL80211_ATTR_BEACON_TAIL]);
                bcn->tail_len = nla_len(attrs[NL80211_ATTR_BEACON_TAIL]);
                haveinfo = true;
        }

        if (!haveinfo)
                return -EINVAL;

        if (attrs[NL80211_ATTR_IE]) {
                bcn->beacon_ies = nla_data(attrs[NL80211_ATTR_IE]);
                bcn->beacon_ies_len = nla_len(attrs[NL80211_ATTR_IE]);
        }

        if (attrs[NL80211_ATTR_IE_PROBE_RESP]) {
                bcn->proberesp_ies =
                        nla_data(attrs[NL80211_ATTR_IE_PROBE_RESP]);
                bcn->proberesp_ies_len =
                        nla_len(attrs[NL80211_ATTR_IE_PROBE_RESP]);
        }

        if (attrs[NL80211_ATTR_IE_ASSOC_RESP]) {
                bcn->assocresp_ies =
                        nla_data(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
                bcn->assocresp_ies_len =
                        nla_len(attrs[NL80211_ATTR_IE_ASSOC_RESP]);
        }

        if (attrs[NL80211_ATTR_PROBE_RESP]) {
                bcn->probe_resp = nla_data(attrs[NL80211_ATTR_PROBE_RESP]);
                bcn->probe_resp_len = nla_len(attrs[NL80211_ATTR_PROBE_RESP]);
        }

        if (attrs[NL80211_ATTR_FTM_RESPONDER]) {
                struct nlattr *tb[NL80211_FTM_RESP_ATTR_MAX + 1];

                err = nla_parse_nested_deprecated(tb,
                                                  NL80211_FTM_RESP_ATTR_MAX,
                                                  attrs[NL80211_ATTR_FTM_RESPONDER],
                                                  NULL, NULL);
                if (err)
                        return err;

                if (tb[NL80211_FTM_RESP_ATTR_ENABLED] &&
                    wiphy_ext_feature_isset(&rdev->wiphy,
                                            NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
                        bcn->ftm_responder = 1;
                else
                        return -EOPNOTSUPP;

                if (tb[NL80211_FTM_RESP_ATTR_LCI]) {
                        bcn->lci = nla_data(tb[NL80211_FTM_RESP_ATTR_LCI]);
                        bcn->lci_len = nla_len(tb[NL80211_FTM_RESP_ATTR_LCI]);
                }

                if (tb[NL80211_FTM_RESP_ATTR_CIVICLOC]) {
                        bcn->civicloc = nla_data(tb[NL80211_FTM_RESP_ATTR_CIVICLOC]);
                        bcn->civicloc_len = nla_len(tb[NL80211_FTM_RESP_ATTR_CIVICLOC]);
                }
        } else {
                bcn->ftm_responder = -1;
        }

        if (attrs[NL80211_ATTR_HE_BSS_COLOR]) {
                err = nl80211_parse_he_bss_color(attrs[NL80211_ATTR_HE_BSS_COLOR],
                                                 &bcn->he_bss_color);
                if (err)
                        return err;
                bcn->he_bss_color_valid = true;
        }

        if (attrs[NL80211_ATTR_MBSSID_ELEMS]) {
                struct cfg80211_mbssid_elems *mbssid =
                        nl80211_parse_mbssid_elems(&rdev->wiphy,
                                                   attrs[NL80211_ATTR_MBSSID_ELEMS]);

                if (IS_ERR(mbssid))
                        return PTR_ERR(mbssid);

                bcn->mbssid_ies = mbssid;

                if (bcn->mbssid_ies && attrs[NL80211_ATTR_EMA_RNR_ELEMS]) {
                        struct cfg80211_rnr_elems *rnr =
                                nl80211_parse_rnr_elems(&rdev->wiphy,
                                                        attrs[NL80211_ATTR_EMA_RNR_ELEMS],
                                                        extack);

                        if (IS_ERR(rnr))
                                return PTR_ERR(rnr);

                        if (rnr && rnr->cnt < bcn->mbssid_ies->cnt)
                                return -EINVAL;

                        bcn->rnr_ies = rnr;
                }
        }

        return 0;
}

static int nl80211_parse_he_obss_pd(struct nlattr *attrs,
                                    struct ieee80211_he_obss_pd *he_obss_pd)
{
        struct nlattr *tb[NL80211_HE_OBSS_PD_ATTR_MAX + 1];
        int err;

        err = nla_parse_nested(tb, NL80211_HE_OBSS_PD_ATTR_MAX, attrs,
                               he_obss_pd_policy, NULL);
        if (err)
                return err;

        if (!tb[NL80211_HE_OBSS_PD_ATTR_SR_CTRL])
                return -EINVAL;

        he_obss_pd->sr_ctrl = nla_get_u8(tb[NL80211_HE_OBSS_PD_ATTR_SR_CTRL]);

        if (tb[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET])
                he_obss_pd->min_offset =
                        nla_get_u8(tb[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET]);
        if (tb[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET])
                he_obss_pd->max_offset =
                        nla_get_u8(tb[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET]);
        if (tb[NL80211_HE_OBSS_PD_ATTR_NON_SRG_MAX_OFFSET])
                he_obss_pd->non_srg_max_offset =
                        nla_get_u8(tb[NL80211_HE_OBSS_PD_ATTR_NON_SRG_MAX_OFFSET]);

        if (he_obss_pd->min_offset > he_obss_pd->max_offset)
                return -EINVAL;

        if (tb[NL80211_HE_OBSS_PD_ATTR_BSS_COLOR_BITMAP])
                memcpy(he_obss_pd->bss_color_bitmap,
                       nla_data(tb[NL80211_HE_OBSS_PD_ATTR_BSS_COLOR_BITMAP]),
                       sizeof(he_obss_pd->bss_color_bitmap));

        if (tb[NL80211_HE_OBSS_PD_ATTR_PARTIAL_BSSID_BITMAP])
                memcpy(he_obss_pd->partial_bssid_bitmap,
                       nla_data(tb[NL80211_HE_OBSS_PD_ATTR_PARTIAL_BSSID_BITMAP]),
                       sizeof(he_obss_pd->partial_bssid_bitmap));

        he_obss_pd->enable = true;

        return 0;
}

static int nl80211_parse_fils_discovery(struct cfg80211_registered_device *rdev,
                                        struct nlattr *attrs,
                                        struct cfg80211_fils_discovery *fd)
{
        struct nlattr *tb[NL80211_FILS_DISCOVERY_ATTR_MAX + 1];
        int ret;

        if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_FILS_DISCOVERY))
                return -EINVAL;

        ret = nla_parse_nested(tb, NL80211_FILS_DISCOVERY_ATTR_MAX, attrs,
                               NULL, NULL);
        if (ret)
                return ret;

        if (!tb[NL80211_FILS_DISCOVERY_ATTR_INT_MIN] &&
            !tb[NL80211_FILS_DISCOVERY_ATTR_INT_MAX] &&
            !tb[NL80211_FILS_DISCOVERY_ATTR_TMPL]) {
                fd->update = true;
                return 0;
        }

        if (!tb[NL80211_FILS_DISCOVERY_ATTR_INT_MIN] ||
            !tb[NL80211_FILS_DISCOVERY_ATTR_INT_MAX] ||
            !tb[NL80211_FILS_DISCOVERY_ATTR_TMPL])
                return -EINVAL;

        fd->tmpl_len = nla_len(tb[NL80211_FILS_DISCOVERY_ATTR_TMPL]);
        fd->tmpl = nla_data(tb[NL80211_FILS_DISCOVERY_ATTR_TMPL]);
        fd->min_interval = nla_get_u32(tb[NL80211_FILS_DISCOVERY_ATTR_INT_MIN]);
        fd->max_interval = nla_get_u32(tb[NL80211_FILS_DISCOVERY_ATTR_INT_MAX]);
        fd->update = true;
        return 0;
}

static int
nl80211_parse_unsol_bcast_probe_resp(struct cfg80211_registered_device *rdev,
                                     struct nlattr *attrs,
                                     struct cfg80211_unsol_bcast_probe_resp *presp)
{
        struct nlattr *tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_MAX + 1];
        int ret;

        if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_UNSOL_BCAST_PROBE_RESP))
                return -EINVAL;

        ret = nla_parse_nested(tb, NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_MAX,
                               attrs, NULL, NULL);
        if (ret)
                return ret;

        if (!tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_INT] &&
            !tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_TMPL]) {
                presp->update = true;
                return 0;
        }

        if (!tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_INT] ||
            !tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_TMPL])
                return -EINVAL;

        presp->tmpl = nla_data(tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_TMPL]);
        presp->tmpl_len = nla_len(tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_TMPL]);
        presp->interval = nla_get_u32(tb[NL80211_UNSOL_BCAST_PROBE_RESP_ATTR_INT]);
        presp->update = true;
        return 0;
}

static void nl80211_check_ap_rate_selectors(struct cfg80211_ap_settings *params,
                                            const struct element *rates)
{
        int i;

        if (!rates)
                return;

        for (i = 0; i < rates->datalen; i++) {
                if (rates->data[i] == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
                        params->ht_required = true;
                if (rates->data[i] == BSS_MEMBERSHIP_SELECTOR_VHT_PHY)
                        params->vht_required = true;
                if (rates->data[i] == BSS_MEMBERSHIP_SELECTOR_HE_PHY)
                        params->he_required = true;
                if (rates->data[i] == BSS_MEMBERSHIP_SELECTOR_SAE_H2E)
                        params->sae_h2e_required = true;
        }
}

/*
 * Since the nl80211 API didn't include, from the beginning, attributes about
 * HT/VHT requirements/capabilities, we parse them out of the IEs for the
 * benefit of drivers that rebuild IEs in the firmware.
 */
static int nl80211_calculate_ap_params(struct cfg80211_ap_settings *params)
{
        const struct cfg80211_beacon_data *bcn = &params->beacon;
        size_t ies_len = bcn->tail_len;
        const u8 *ies = bcn->tail;
        const struct element *rates;
        const struct element *cap;

        rates = cfg80211_find_elem(WLAN_EID_SUPP_RATES, ies, ies_len);
        nl80211_check_ap_rate_selectors(params, rates);

        rates = cfg80211_find_elem(WLAN_EID_EXT_SUPP_RATES, ies, ies_len);
        nl80211_check_ap_rate_selectors(params, rates);

        cap = cfg80211_find_elem(WLAN_EID_HT_CAPABILITY, ies, ies_len);
        if (cap && cap->datalen >= sizeof(*params->ht_cap))
                params->ht_cap = (void *)cap->data;
        cap = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, ies, ies_len);
        if (cap && cap->datalen >= sizeof(*params->vht_cap))
                params->vht_cap = (void *)cap->data;
        cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, ies, ies_len);
        if (cap && cap->datalen >= sizeof(*params->he_cap) + 1)
                params->he_cap = (void *)(cap->data + 1);
        cap = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ies, ies_len);
        if (cap && cap->datalen >= sizeof(*params->he_oper) + 1)
                params->he_oper = (void *)(cap->data + 1);
        cap = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_CAPABILITY, ies, ies_len);
        if (cap) {
                if (!cap->datalen)
                        return -EINVAL;
                params->eht_cap = (void *)(cap->data + 1);
                if (!ieee80211_eht_capa_size_ok((const u8 *)params->he_cap,
                                                (const u8 *)params->eht_cap,
                                                cap->datalen - 1, true))
                        return -EINVAL;
        }
        cap = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_OPERATION, ies, ies_len);
        if (cap) {
                if (!cap->datalen)
                        return -EINVAL;
                params->eht_oper = (void *)(cap->data + 1);
                if (!ieee80211_eht_oper_size_ok((const u8 *)params->eht_oper,
                                                cap->datalen - 1))
                        return -EINVAL;
        }
        return 0;
}

static bool nl80211_get_ap_channel(struct cfg80211_registered_device *rdev,
                                   struct cfg80211_ap_settings *params)
{
        struct wireless_dev *wdev;

        list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
                if (wdev->iftype != NL80211_IFTYPE_AP &&
                    wdev->iftype != NL80211_IFTYPE_P2P_GO)
                        continue;

                if (!wdev->u.ap.preset_chandef.chan)
                        continue;

                params->chandef = wdev->u.ap.preset_chandef;
                return true;
        }

        return false;
}

static bool nl80211_valid_auth_type(struct cfg80211_registered_device *rdev,
                                    enum nl80211_auth_type auth_type,
                                    enum nl80211_commands cmd)
{
        if (auth_type > NL80211_AUTHTYPE_MAX)
                return false;

        switch (cmd) {
        case NL80211_CMD_AUTHENTICATE:
                if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
                    auth_type == NL80211_AUTHTYPE_SAE)
                        return false;
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_FILS_STA) &&
                    (auth_type == NL80211_AUTHTYPE_FILS_SK ||
                     auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
                     auth_type == NL80211_AUTHTYPE_FILS_PK))
                        return false;
                return true;
        case NL80211_CMD_CONNECT:
                if (!(rdev->wiphy.features & NL80211_FEATURE_SAE) &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_SAE_OFFLOAD) &&
                    auth_type == NL80211_AUTHTYPE_SAE)
                        return false;

                /* FILS with SK PFS or PK not supported yet */
                if (auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
                    auth_type == NL80211_AUTHTYPE_FILS_PK)
                        return false;
                if (!wiphy_ext_feature_isset(
                            &rdev->wiphy,
                            NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
                    auth_type == NL80211_AUTHTYPE_FILS_SK)
                        return false;
                return true;
        case NL80211_CMD_START_AP:
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_SAE_OFFLOAD_AP) &&
                    auth_type == NL80211_AUTHTYPE_SAE)
                        return false;
                /* FILS not supported yet */
                if (auth_type == NL80211_AUTHTYPE_FILS_SK ||
                    auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
                    auth_type == NL80211_AUTHTYPE_FILS_PK)
                        return false;
                return true;
        default:
                return false;
        }
}

static void nl80211_send_ap_started(struct wireless_dev *wdev,
                                    unsigned int link_id)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_START_AP);
        if (!hdr)
                goto out;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            (wdev->u.ap.ssid_len &&
             nla_put(msg, NL80211_ATTR_SSID, wdev->u.ap.ssid_len,
                     wdev->u.ap.ssid)) ||
            (wdev->valid_links &&
             nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id)))
                goto out;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;
out:
        nlmsg_free(msg);
}

static int nl80211_validate_ap_phy_operation(struct cfg80211_ap_settings *params)
{
        struct ieee80211_channel *channel = params->chandef.chan;

        if ((params->he_cap ||  params->he_oper) &&
            (channel->flags & IEEE80211_CHAN_NO_HE))
                return -EOPNOTSUPP;

        if ((params->eht_cap || params->eht_oper) &&
            (channel->flags & IEEE80211_CHAN_NO_EHT))
                return -EOPNOTSUPP;

        return 0;
}

static int nl80211_start_ap(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_beaconing_check_config beacon_check = {};
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_ap_settings *params;
        int err;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                return -EOPNOTSUPP;

        if (!rdev->ops->start_ap)
                return -EOPNOTSUPP;

        if (wdev->cac_started)
                return -EBUSY;

        if (wdev->links[link_id].ap.beacon_interval)
                return -EALREADY;

        /* these are required for START_AP */
        if (!info->attrs[NL80211_ATTR_BEACON_INTERVAL] ||
            !info->attrs[NL80211_ATTR_DTIM_PERIOD] ||
            !info->attrs[NL80211_ATTR_BEACON_HEAD])
                return -EINVAL;

        params = kzalloc(sizeof(*params), GFP_KERNEL);
        if (!params)
                return -ENOMEM;

        err = nl80211_parse_beacon(rdev, info->attrs, &params->beacon,
                                   info->extack);
        if (err)
                goto out;

        params->beacon_interval =
                nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);
        params->dtim_period =
                nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);

        err = cfg80211_validate_beacon_int(rdev, dev->ieee80211_ptr->iftype,
                                           params->beacon_interval);
        if (err)
                goto out;

        /*
         * In theory, some of these attributes should be required here
         * but since they were not used when the command was originally
         * added, keep them optional for old user space programs to let
         * them continue to work with drivers that do not need the
         * additional information -- drivers must check!
         */
        if (info->attrs[NL80211_ATTR_SSID]) {
                params->ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
                params->ssid_len =
                        nla_len(info->attrs[NL80211_ATTR_SSID]);
                if (params->ssid_len == 0) {
                        err = -EINVAL;
                        goto out;
                }

                if (wdev->u.ap.ssid_len &&
                    (wdev->u.ap.ssid_len != params->ssid_len ||
                     memcmp(wdev->u.ap.ssid, params->ssid, params->ssid_len))) {
                        /* require identical SSID for MLO */
                        err = -EINVAL;
                        goto out;
                }
        } else if (wdev->valid_links) {
                /* require SSID for MLO */
                err = -EINVAL;
                goto out;
        }

        if (info->attrs[NL80211_ATTR_HIDDEN_SSID])
                params->hidden_ssid = nla_get_u32(
                        info->attrs[NL80211_ATTR_HIDDEN_SSID]);

        params->privacy = !!info->attrs[NL80211_ATTR_PRIVACY];

        if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
                params->auth_type = nla_get_u32(
                        info->attrs[NL80211_ATTR_AUTH_TYPE]);
                if (!nl80211_valid_auth_type(rdev, params->auth_type,
                                             NL80211_CMD_START_AP)) {
                        err = -EINVAL;
                        goto out;
                }
        } else
                params->auth_type = NL80211_AUTHTYPE_AUTOMATIC;

        err = nl80211_crypto_settings(rdev, info, &params->crypto,
                                      NL80211_MAX_NR_CIPHER_SUITES);
        if (err)
                goto out;

        if (info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]) {
                if (!(rdev->wiphy.features & NL80211_FEATURE_INACTIVITY_TIMER)) {
                        err = -EOPNOTSUPP;
                        goto out;
                }
                params->inactivity_timeout = nla_get_u16(
                        info->attrs[NL80211_ATTR_INACTIVITY_TIMEOUT]);
        }

        if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
                if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
                        err = -EINVAL;
                        goto out;
                }
                params->p2p_ctwindow =
                        nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
                if (params->p2p_ctwindow != 0 &&
                    !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)) {
                        err = -EINVAL;
                        goto out;
                }
        }

        if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
                u8 tmp;

                if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
                        err = -EINVAL;
                        goto out;
                }
                tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
                params->p2p_opp_ps = tmp;
                if (params->p2p_opp_ps != 0 &&
                    !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)) {
                        err = -EINVAL;
                        goto out;
                }
        }

        if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
                err = nl80211_parse_chandef(rdev, info, &params->chandef);
                if (err)
                        goto out;
        } else if (wdev->valid_links) {
                /* with MLD need to specify the channel configuration */
                err = -EINVAL;
                goto out;
        } else if (wdev->u.ap.preset_chandef.chan) {
                params->chandef = wdev->u.ap.preset_chandef;
        } else if (!nl80211_get_ap_channel(rdev, params)) {
                err = -EINVAL;
                goto out;
        }

        beacon_check.iftype = wdev->iftype;
        beacon_check.relax = true;
        beacon_check.reg_power =
                cfg80211_get_6ghz_power_type(params->beacon.tail,
                                             params->beacon.tail_len);
        if (!cfg80211_reg_check_beaconing(&rdev->wiphy, &params->chandef,
                                          &beacon_check)) {
                err = -EINVAL;
                goto out;
        }

        if (info->attrs[NL80211_ATTR_TX_RATES]) {
                err = nl80211_parse_tx_bitrate_mask(info, info->attrs,
                                                    NL80211_ATTR_TX_RATES,
                                                    &params->beacon_rate,
                                                    dev, false, link_id);
                if (err)
                        goto out;

                err = validate_beacon_tx_rate(rdev, params->chandef.chan->band,
                                              &params->beacon_rate);
                if (err)
                        goto out;
        }

        if (info->attrs[NL80211_ATTR_SMPS_MODE]) {
                params->smps_mode =
                        nla_get_u8(info->attrs[NL80211_ATTR_SMPS_MODE]);
                switch (params->smps_mode) {
                case NL80211_SMPS_OFF:
                        break;
                case NL80211_SMPS_STATIC:
                        if (!(rdev->wiphy.features &
                              NL80211_FEATURE_STATIC_SMPS)) {
                                err = -EINVAL;
                                goto out;
                        }
                        break;
                case NL80211_SMPS_DYNAMIC:
                        if (!(rdev->wiphy.features &
                              NL80211_FEATURE_DYNAMIC_SMPS)) {
                                err = -EINVAL;
                                goto out;
                        }
                        break;
                default:
                        err = -EINVAL;
                        goto out;
                }
        } else {
                params->smps_mode = NL80211_SMPS_OFF;
        }

        params->pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
        if (params->pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
                err = -EOPNOTSUPP;
                goto out;
        }

        if (info->attrs[NL80211_ATTR_ACL_POLICY]) {
                params->acl = parse_acl_data(&rdev->wiphy, info);
                if (IS_ERR(params->acl)) {
                        err = PTR_ERR(params->acl);
                        params->acl = NULL;
                        goto out;
                }
        }

        params->twt_responder =
                    nla_get_flag(info->attrs[NL80211_ATTR_TWT_RESPONDER]);

        if (info->attrs[NL80211_ATTR_HE_OBSS_PD]) {
                err = nl80211_parse_he_obss_pd(
                                        info->attrs[NL80211_ATTR_HE_OBSS_PD],
                                        &params->he_obss_pd);
                if (err)
                        goto out;
        }

        if (info->attrs[NL80211_ATTR_FILS_DISCOVERY]) {
                err = nl80211_parse_fils_discovery(rdev,
                                                   info->attrs[NL80211_ATTR_FILS_DISCOVERY],
                                                   &params->fils_discovery);
                if (err)
                        goto out;
        }

        if (info->attrs[NL80211_ATTR_UNSOL_BCAST_PROBE_RESP]) {
                err = nl80211_parse_unsol_bcast_probe_resp(
                        rdev, info->attrs[NL80211_ATTR_UNSOL_BCAST_PROBE_RESP],
                        &params->unsol_bcast_probe_resp);
                if (err)
                        goto out;
        }

        if (info->attrs[NL80211_ATTR_MBSSID_CONFIG]) {
                err = nl80211_parse_mbssid_config(&rdev->wiphy, dev,
                                                  info->attrs[NL80211_ATTR_MBSSID_CONFIG],
                                                  &params->mbssid_config,
                                                  params->beacon.mbssid_ies ?
                                                        params->beacon.mbssid_ies->cnt :
                                                        0);
                if (err)
                        goto out;
        }

        if (!params->mbssid_config.ema && params->beacon.rnr_ies) {
                err = -EINVAL;
                goto out;
        }

        err = nl80211_calculate_ap_params(params);
        if (err)
                goto out;

        err = nl80211_validate_ap_phy_operation(params);
        if (err)
                goto out;

        if (info->attrs[NL80211_ATTR_AP_SETTINGS_FLAGS])
                params->flags = nla_get_u32(
                        info->attrs[NL80211_ATTR_AP_SETTINGS_FLAGS]);
        else if (info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])
                params->flags |= NL80211_AP_SETTINGS_EXTERNAL_AUTH_SUPPORT;

        if (wdev->conn_owner_nlportid &&
            info->attrs[NL80211_ATTR_SOCKET_OWNER] &&
            wdev->conn_owner_nlportid != info->snd_portid) {
                err = -EINVAL;
                goto out;
        }

        /* FIXME: validate MLO/link-id against driver capabilities */

        err = rdev_start_ap(rdev, dev, params);
        if (!err) {
                wdev->links[link_id].ap.beacon_interval = params->beacon_interval;
                wdev->links[link_id].ap.chandef = params->chandef;
                wdev->u.ap.ssid_len = params->ssid_len;
                memcpy(wdev->u.ap.ssid, params->ssid,
                       params->ssid_len);

                if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
                        wdev->conn_owner_nlportid = info->snd_portid;

                nl80211_send_ap_started(wdev, link_id);
        }
out:
        kfree(params->acl);
        kfree(params->beacon.mbssid_ies);
        if (params->mbssid_config.tx_wdev &&
            params->mbssid_config.tx_wdev->netdev &&
            params->mbssid_config.tx_wdev->netdev != dev)
                dev_put(params->mbssid_config.tx_wdev->netdev);
        kfree(params->beacon.rnr_ies);
        kfree(params);

        return err;
}

static int nl80211_set_beacon(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_beaconing_check_config beacon_check = {};
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_ap_update *params;
        struct nlattr *attr;
        int err;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                return -EOPNOTSUPP;

        if (!rdev->ops->change_beacon)
                return -EOPNOTSUPP;

        if (!wdev->links[link_id].ap.beacon_interval)
                return -EINVAL;

        params = kzalloc(sizeof(*params), GFP_KERNEL);
        if (!params)
                return -ENOMEM;

        err = nl80211_parse_beacon(rdev, info->attrs, &params->beacon,
                                   info->extack);
        if (err)
                goto out;

        /* recheck beaconing is permitted with possibly changed power type */
        beacon_check.iftype = wdev->iftype;
        beacon_check.relax = true;
        beacon_check.reg_power =
                cfg80211_get_6ghz_power_type(params->beacon.tail,
                                             params->beacon.tail_len);
        if (!cfg80211_reg_check_beaconing(&rdev->wiphy,
                                          &wdev->links[link_id].ap.chandef,
                                          &beacon_check)) {
                err = -EINVAL;
                goto out;
        }

        attr = info->attrs[NL80211_ATTR_FILS_DISCOVERY];
        if (attr) {
                err = nl80211_parse_fils_discovery(rdev, attr,
                                                   &params->fils_discovery);
                if (err)
                        goto out;
        }

        attr = info->attrs[NL80211_ATTR_UNSOL_BCAST_PROBE_RESP];
        if (attr) {
                err = nl80211_parse_unsol_bcast_probe_resp(rdev, attr,
                                                           &params->unsol_bcast_probe_resp);
                if (err)
                        goto out;
        }

        err = rdev_change_beacon(rdev, dev, params);

out:
        kfree(params->beacon.mbssid_ies);
        kfree(params->beacon.rnr_ies);
        kfree(params);
        return err;
}

static int nl80211_stop_ap(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];

        return cfg80211_stop_ap(rdev, dev, link_id, false);
}

static const struct nla_policy sta_flags_policy[NL80211_STA_FLAG_MAX + 1] = {
        [NL80211_STA_FLAG_AUTHORIZED] = { .type = NLA_FLAG },
        [NL80211_STA_FLAG_SHORT_PREAMBLE] = { .type = NLA_FLAG },
        [NL80211_STA_FLAG_WME] = { .type = NLA_FLAG },
        [NL80211_STA_FLAG_MFP] = { .type = NLA_FLAG },
        [NL80211_STA_FLAG_AUTHENTICATED] = { .type = NLA_FLAG },
        [NL80211_STA_FLAG_TDLS_PEER] = { .type = NLA_FLAG },
};

static int parse_station_flags(struct genl_info *info,
                               enum nl80211_iftype iftype,
                               struct station_parameters *params)
{
        struct nlattr *flags[NL80211_STA_FLAG_MAX + 1];
        struct nlattr *nla;
        int flag;

        /*
         * Try parsing the new attribute first so userspace
         * can specify both for older kernels.
         */
        nla = info->attrs[NL80211_ATTR_STA_FLAGS2];
        if (nla) {
                struct nl80211_sta_flag_update *sta_flags;

                sta_flags = nla_data(nla);
                params->sta_flags_mask = sta_flags->mask;
                params->sta_flags_set = sta_flags->set;
                params->sta_flags_set &= params->sta_flags_mask;
                if ((params->sta_flags_mask |
                     params->sta_flags_set) & BIT(__NL80211_STA_FLAG_INVALID))
                        return -EINVAL;
                return 0;
        }

        /* if present, parse the old attribute */

        nla = info->attrs[NL80211_ATTR_STA_FLAGS];
        if (!nla)
                return 0;

        if (nla_parse_nested_deprecated(flags, NL80211_STA_FLAG_MAX, nla, sta_flags_policy, info->extack))
                return -EINVAL;

        /*
         * Only allow certain flags for interface types so that
         * other attributes are silently ignored. Remember that
         * this is backward compatibility code with old userspace
         * and shouldn't be hit in other cases anyway.
         */
        switch (iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_P2P_GO:
                params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
                                         BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
                                         BIT(NL80211_STA_FLAG_WME) |
                                         BIT(NL80211_STA_FLAG_MFP);
                break;
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_STATION:
                params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
                                         BIT(NL80211_STA_FLAG_TDLS_PEER);
                break;
        case NL80211_IFTYPE_MESH_POINT:
                params->sta_flags_mask = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
                                         BIT(NL80211_STA_FLAG_MFP) |
                                         BIT(NL80211_STA_FLAG_AUTHORIZED);
                break;
        default:
                return -EINVAL;
        }

        for (flag = 1; flag <= NL80211_STA_FLAG_MAX; flag++) {
                if (flags[flag]) {
                        params->sta_flags_set |= (1<<flag);

                        /* no longer support new API additions in old API */
                        if (flag > NL80211_STA_FLAG_MAX_OLD_API)
                                return -EINVAL;
                }
        }

        return 0;
}

bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info, int attr)
{
        struct nlattr *rate;
        u32 bitrate;
        u16 bitrate_compat;
        enum nl80211_rate_info rate_flg;

        rate = nla_nest_start_noflag(msg, attr);
        if (!rate)
                return false;

        /* cfg80211_calculate_bitrate will return 0 for mcs >= 32 */
        bitrate = cfg80211_calculate_bitrate(info);
        /* report 16-bit bitrate only if we can */
        bitrate_compat = bitrate < (1UL << 16) ? bitrate : 0;
        if (bitrate > 0 &&
            nla_put_u32(msg, NL80211_RATE_INFO_BITRATE32, bitrate))
                return false;
        if (bitrate_compat > 0 &&
            nla_put_u16(msg, NL80211_RATE_INFO_BITRATE, bitrate_compat))
                return false;

        switch (info->bw) {
        case RATE_INFO_BW_1:
                rate_flg = NL80211_RATE_INFO_1_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_2:
                rate_flg = NL80211_RATE_INFO_2_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_4:
                rate_flg = NL80211_RATE_INFO_4_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_5:
                rate_flg = NL80211_RATE_INFO_5_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_8:
                rate_flg = NL80211_RATE_INFO_8_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_10:
                rate_flg = NL80211_RATE_INFO_10_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_16:
                rate_flg = NL80211_RATE_INFO_16_MHZ_WIDTH;
                break;
        default:
                WARN_ON(1);
                fallthrough;
        case RATE_INFO_BW_20:
                rate_flg = 0;
                break;
        case RATE_INFO_BW_40:
                rate_flg = NL80211_RATE_INFO_40_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_80:
                rate_flg = NL80211_RATE_INFO_80_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_160:
                rate_flg = NL80211_RATE_INFO_160_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_HE_RU:
                rate_flg = 0;
                WARN_ON(!(info->flags & RATE_INFO_FLAGS_HE_MCS));
                break;
        case RATE_INFO_BW_320:
                rate_flg = NL80211_RATE_INFO_320_MHZ_WIDTH;
                break;
        case RATE_INFO_BW_EHT_RU:
                rate_flg = 0;
                WARN_ON(!(info->flags & RATE_INFO_FLAGS_EHT_MCS));
                break;
        }

        if (rate_flg && nla_put_flag(msg, rate_flg))
                return false;

        if (info->flags & RATE_INFO_FLAGS_MCS) {
                if (nla_put_u8(msg, NL80211_RATE_INFO_MCS, info->mcs))
                        return false;
                if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
                    nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
                        return false;
        } else if (info->flags & RATE_INFO_FLAGS_VHT_MCS) {
                if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_MCS, info->mcs))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_VHT_NSS, info->nss))
                        return false;
                if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
                    nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
                        return false;
        } else if (info->flags & RATE_INFO_FLAGS_HE_MCS) {
                if (nla_put_u8(msg, NL80211_RATE_INFO_HE_MCS, info->mcs))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_HE_NSS, info->nss))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_HE_GI, info->he_gi))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_HE_DCM, info->he_dcm))
                        return false;
                if (info->bw == RATE_INFO_BW_HE_RU &&
                    nla_put_u8(msg, NL80211_RATE_INFO_HE_RU_ALLOC,
                               info->he_ru_alloc))
                        return false;
        } else if (info->flags & RATE_INFO_FLAGS_S1G_MCS) {
                if (nla_put_u8(msg, NL80211_RATE_INFO_S1G_MCS, info->mcs))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_S1G_NSS, info->nss))
                        return false;
                if (info->flags & RATE_INFO_FLAGS_SHORT_GI &&
                    nla_put_flag(msg, NL80211_RATE_INFO_SHORT_GI))
                        return false;
        } else if (info->flags & RATE_INFO_FLAGS_EHT_MCS) {
                if (nla_put_u8(msg, NL80211_RATE_INFO_EHT_MCS, info->mcs))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_EHT_NSS, info->nss))
                        return false;
                if (nla_put_u8(msg, NL80211_RATE_INFO_EHT_GI, info->eht_gi))
                        return false;
                if (info->bw == RATE_INFO_BW_EHT_RU &&
                    nla_put_u8(msg, NL80211_RATE_INFO_EHT_RU_ALLOC,
                               info->eht_ru_alloc))
                        return false;
        }

        nla_nest_end(msg, rate);
        return true;
}

static bool nl80211_put_signal(struct sk_buff *msg, u8 mask, s8 *signal,
                               int id)
{
        void *attr;
        int i = 0;

        if (!mask)
                return true;

        attr = nla_nest_start_noflag(msg, id);
        if (!attr)
                return false;

        for (i = 0; i < IEEE80211_MAX_CHAINS; i++) {
                if (!(mask & BIT(i)))
                        continue;

                if (nla_put_u8(msg, i, signal[i]))
                        return false;
        }

        nla_nest_end(msg, attr);

        return true;
}

static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid,
                                u32 seq, int flags,
                                struct cfg80211_registered_device *rdev,
                                struct net_device *dev,
                                const u8 *mac_addr, struct station_info *sinfo)
{
        void *hdr;
        struct nlattr *sinfoattr, *bss_param;

        hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
        if (!hdr) {
                cfg80211_sinfo_release_content(sinfo);
                return -1;
        }

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
            nla_put_u32(msg, NL80211_ATTR_GENERATION, sinfo->generation))
                goto nla_put_failure;

        sinfoattr = nla_nest_start_noflag(msg, NL80211_ATTR_STA_INFO);
        if (!sinfoattr)
                goto nla_put_failure;

#define PUT_SINFO(attr, memb, type) do {                                \
        BUILD_BUG_ON(sizeof(type) == sizeof(u64));                        \
        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_ ## attr) &&        \
            nla_put_ ## type(msg, NL80211_STA_INFO_ ## attr,                \
                             sinfo->memb))                                \
                goto nla_put_failure;                                        \
        } while (0)
#define PUT_SINFO_U64(attr, memb) do {                                        \
        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_ ## attr) &&        \
            nla_put_u64_64bit(msg, NL80211_STA_INFO_ ## attr,                \
                              sinfo->memb, NL80211_STA_INFO_PAD))        \
                goto nla_put_failure;                                        \
        } while (0)

        PUT_SINFO(CONNECTED_TIME, connected_time, u32);
        PUT_SINFO(INACTIVE_TIME, inactive_time, u32);
        PUT_SINFO_U64(ASSOC_AT_BOOTTIME, assoc_at);

        if (sinfo->filled & (BIT_ULL(NL80211_STA_INFO_RX_BYTES) |
                             BIT_ULL(NL80211_STA_INFO_RX_BYTES64)) &&
            nla_put_u32(msg, NL80211_STA_INFO_RX_BYTES,
                        (u32)sinfo->rx_bytes))
                goto nla_put_failure;

        if (sinfo->filled & (BIT_ULL(NL80211_STA_INFO_TX_BYTES) |
                             BIT_ULL(NL80211_STA_INFO_TX_BYTES64)) &&
            nla_put_u32(msg, NL80211_STA_INFO_TX_BYTES,
                        (u32)sinfo->tx_bytes))
                goto nla_put_failure;

        PUT_SINFO_U64(RX_BYTES64, rx_bytes);
        PUT_SINFO_U64(TX_BYTES64, tx_bytes);
        PUT_SINFO(LLID, llid, u16);
        PUT_SINFO(PLID, plid, u16);
        PUT_SINFO(PLINK_STATE, plink_state, u8);
        PUT_SINFO_U64(RX_DURATION, rx_duration);
        PUT_SINFO_U64(TX_DURATION, tx_duration);

        if (wiphy_ext_feature_isset(&rdev->wiphy,
                                    NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
                PUT_SINFO(AIRTIME_WEIGHT, airtime_weight, u16);

        switch (rdev->wiphy.signal_type) {
        case CFG80211_SIGNAL_TYPE_MBM:
                PUT_SINFO(SIGNAL, signal, u8);
                PUT_SINFO(SIGNAL_AVG, signal_avg, u8);
                break;
        default:
                break;
        }
        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL)) {
                if (!nl80211_put_signal(msg, sinfo->chains,
                                        sinfo->chain_signal,
                                        NL80211_STA_INFO_CHAIN_SIGNAL))
                        goto nla_put_failure;
        }
        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL_AVG)) {
                if (!nl80211_put_signal(msg, sinfo->chains,
                                        sinfo->chain_signal_avg,
                                        NL80211_STA_INFO_CHAIN_SIGNAL_AVG))
                        goto nla_put_failure;
        }
        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_TX_BITRATE)) {
                if (!nl80211_put_sta_rate(msg, &sinfo->txrate,
                                          NL80211_STA_INFO_TX_BITRATE))
                        goto nla_put_failure;
        }
        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_RX_BITRATE)) {
                if (!nl80211_put_sta_rate(msg, &sinfo->rxrate,
                                          NL80211_STA_INFO_RX_BITRATE))
                        goto nla_put_failure;
        }

        PUT_SINFO(RX_PACKETS, rx_packets, u32);
        PUT_SINFO(TX_PACKETS, tx_packets, u32);
        PUT_SINFO(TX_RETRIES, tx_retries, u32);
        PUT_SINFO(TX_FAILED, tx_failed, u32);
        PUT_SINFO(EXPECTED_THROUGHPUT, expected_throughput, u32);
        PUT_SINFO(AIRTIME_LINK_METRIC, airtime_link_metric, u32);
        PUT_SINFO(BEACON_LOSS, beacon_loss_count, u32);
        PUT_SINFO(LOCAL_PM, local_pm, u32);
        PUT_SINFO(PEER_PM, peer_pm, u32);
        PUT_SINFO(NONPEER_PM, nonpeer_pm, u32);
        PUT_SINFO(CONNECTED_TO_GATE, connected_to_gate, u8);
        PUT_SINFO(CONNECTED_TO_AS, connected_to_as, u8);

        if (sinfo->filled & BIT_ULL(NL80211_STA_INFO_BSS_PARAM)) {
                bss_param = nla_nest_start_noflag(msg,
                                                  NL80211_STA_INFO_BSS_PARAM);
                if (!bss_param)
                        goto nla_put_failure;

                if (((sinfo->bss_param.flags & BSS_PARAM_FLAGS_CTS_PROT) &&
                     nla_put_flag(msg, NL80211_STA_BSS_PARAM_CTS_PROT)) ||
                    ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_PREAMBLE) &&
                     nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_PREAMBLE)) ||
                    ((sinfo->bss_param.flags & BSS_PARAM_FLAGS_SHORT_SLOT_TIME) &&
                     nla_put_flag(msg, NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME)) ||
                    nla_put_u8(msg, NL80211_STA_BSS_PARAM_DTIM_PERIOD,
                               sinfo->bss_param.dtim_period) ||
                    nla_put_u16(msg, NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
                                sinfo->bss_param.beacon_interval))
                        goto nla_put_failure;

                nla_nest_end(msg, bss_param);
        }
        if ((sinfo->filled & BIT_ULL(NL80211_STA_INFO_STA_FLAGS)) &&
            nla_put(msg, NL80211_STA_INFO_STA_FLAGS,
                    sizeof(struct nl80211_sta_flag_update),
                    &sinfo->sta_flags))
                goto nla_put_failure;

        PUT_SINFO_U64(T_OFFSET, t_offset);
        PUT_SINFO_U64(RX_DROP_MISC, rx_dropped_misc);
        PUT_SINFO_U64(BEACON_RX, rx_beacon);
        PUT_SINFO(BEACON_SIGNAL_AVG, rx_beacon_signal_avg, u8);
        PUT_SINFO(RX_MPDUS, rx_mpdu_count, u32);
        PUT_SINFO(FCS_ERROR_COUNT, fcs_err_count, u32);
        if (wiphy_ext_feature_isset(&rdev->wiphy,
                                    NL80211_EXT_FEATURE_ACK_SIGNAL_SUPPORT)) {
                PUT_SINFO(ACK_SIGNAL, ack_signal, u8);
                PUT_SINFO(ACK_SIGNAL_AVG, avg_ack_signal, s8);
        }

#undef PUT_SINFO
#undef PUT_SINFO_U64

        if (sinfo->pertid) {
                struct nlattr *tidsattr;
                int tid;

                tidsattr = nla_nest_start_noflag(msg,
                                                 NL80211_STA_INFO_TID_STATS);
                if (!tidsattr)
                        goto nla_put_failure;

                for (tid = 0; tid < IEEE80211_NUM_TIDS + 1; tid++) {
                        struct cfg80211_tid_stats *tidstats;
                        struct nlattr *tidattr;

                        tidstats = &sinfo->pertid[tid];

                        if (!tidstats->filled)
                                continue;

                        tidattr = nla_nest_start_noflag(msg, tid + 1);
                        if (!tidattr)
                                goto nla_put_failure;

#define PUT_TIDVAL_U64(attr, memb) do {                                        \
        if (tidstats->filled & BIT(NL80211_TID_STATS_ ## attr) &&        \
            nla_put_u64_64bit(msg, NL80211_TID_STATS_ ## attr,                \
                              tidstats->memb, NL80211_TID_STATS_PAD))        \
                goto nla_put_failure;                                        \
        } while (0)

                        PUT_TIDVAL_U64(RX_MSDU, rx_msdu);
                        PUT_TIDVAL_U64(TX_MSDU, tx_msdu);
                        PUT_TIDVAL_U64(TX_MSDU_RETRIES, tx_msdu_retries);
                        PUT_TIDVAL_U64(TX_MSDU_FAILED, tx_msdu_failed);

#undef PUT_TIDVAL_U64
                        if ((tidstats->filled &
                             BIT(NL80211_TID_STATS_TXQ_STATS)) &&
                            !nl80211_put_txq_stats(msg, &tidstats->txq_stats,
                                                   NL80211_TID_STATS_TXQ_STATS))
                                goto nla_put_failure;

                        nla_nest_end(msg, tidattr);
                }

                nla_nest_end(msg, tidsattr);
        }

        nla_nest_end(msg, sinfoattr);

        if (sinfo->assoc_req_ies_len &&
            nla_put(msg, NL80211_ATTR_IE, sinfo->assoc_req_ies_len,
                    sinfo->assoc_req_ies))
                goto nla_put_failure;

        if (sinfo->assoc_resp_ies_len &&
            nla_put(msg, NL80211_ATTR_RESP_IE, sinfo->assoc_resp_ies_len,
                    sinfo->assoc_resp_ies))
                goto nla_put_failure;

        if (sinfo->mlo_params_valid) {
                if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID,
                               sinfo->assoc_link_id))
                        goto nla_put_failure;

                if (!is_zero_ether_addr(sinfo->mld_addr) &&
                    nla_put(msg, NL80211_ATTR_MLD_ADDR, ETH_ALEN,
                            sinfo->mld_addr))
                        goto nla_put_failure;
        }

        cfg80211_sinfo_release_content(sinfo);
        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        cfg80211_sinfo_release_content(sinfo);
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_dump_station(struct sk_buff *skb,
                                struct netlink_callback *cb)
{
        struct station_info sinfo;
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        u8 mac_addr[ETH_ALEN];
        int sta_idx = cb->args[2];
        int err;

        err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
        if (err)
                return err;
        /* nl80211_prepare_wdev_dump acquired it in the successful case */
        __acquire(&rdev->wiphy.mtx);

        if (!wdev->netdev) {
                err = -EINVAL;
                goto out_err;
        }

        if (!rdev->ops->dump_station) {
                err = -EOPNOTSUPP;
                goto out_err;
        }

        while (1) {
                memset(&sinfo, 0, sizeof(sinfo));
                err = rdev_dump_station(rdev, wdev->netdev, sta_idx,
                                        mac_addr, &sinfo);
                if (err == -ENOENT)
                        break;
                if (err)
                        goto out_err;

                if (nl80211_send_station(skb, NL80211_CMD_NEW_STATION,
                                NETLINK_CB(cb->skb).portid,
                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                rdev, wdev->netdev, mac_addr,
                                &sinfo) < 0)
                        goto out;

                sta_idx++;
        }

 out:
        cb->args[2] = sta_idx;
        err = skb->len;
 out_err:
        wiphy_unlock(&rdev->wiphy);

        return err;
}

static int nl80211_get_station(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct station_info sinfo;
        struct sk_buff *msg;
        u8 *mac_addr = NULL;
        int err;

        memset(&sinfo, 0, sizeof(sinfo));

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (!rdev->ops->get_station)
                return -EOPNOTSUPP;

        err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
        if (err)
                return err;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg) {
                cfg80211_sinfo_release_content(&sinfo);
                return -ENOMEM;
        }

        if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION,
                                 info->snd_portid, info->snd_seq, 0,
                                 rdev, dev, mac_addr, &sinfo) < 0) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return genlmsg_reply(msg, info);
}

int cfg80211_check_station_change(struct wiphy *wiphy,
                                  struct station_parameters *params,
                                  enum cfg80211_station_type statype)
{
        if (params->listen_interval != -1 &&
            statype != CFG80211_STA_AP_CLIENT_UNASSOC)
                return -EINVAL;

        if (params->support_p2p_ps != -1 &&
            statype != CFG80211_STA_AP_CLIENT_UNASSOC)
                return -EINVAL;

        if (params->aid &&
            !(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) &&
            statype != CFG80211_STA_AP_CLIENT_UNASSOC)
                return -EINVAL;

        /* When you run into this, adjust the code below for the new flag */
        BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 8);

        switch (statype) {
        case CFG80211_STA_MESH_PEER_KERNEL:
        case CFG80211_STA_MESH_PEER_USER:
                /*
                 * No ignoring the TDLS flag here -- the userspace mesh
                 * code doesn't have the bug of including TDLS in the
                 * mask everywhere.
                 */
                if (params->sta_flags_mask &
                                ~(BIT(NL80211_STA_FLAG_AUTHENTICATED) |
                                  BIT(NL80211_STA_FLAG_MFP) |
                                  BIT(NL80211_STA_FLAG_AUTHORIZED)))
                        return -EINVAL;
                break;
        case CFG80211_STA_TDLS_PEER_SETUP:
        case CFG80211_STA_TDLS_PEER_ACTIVE:
                if (!(params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
                        return -EINVAL;
                /* ignore since it can't change */
                params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
                break;
        default:
                /* disallow mesh-specific things */
                if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION)
                        return -EINVAL;
                if (params->local_pm)
                        return -EINVAL;
                if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
                        return -EINVAL;
        }

        if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
            statype != CFG80211_STA_TDLS_PEER_ACTIVE) {
                /* TDLS can't be set, ... */
                if (params->sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER))
                        return -EINVAL;
                /*
                 * ... but don't bother the driver with it. This works around
                 * a hostapd/wpa_supplicant issue -- it always includes the
                 * TLDS_PEER flag in the mask even for AP mode.
                 */
                params->sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);
        }

        if (statype != CFG80211_STA_TDLS_PEER_SETUP &&
            statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
                /* reject other things that can't change */
                if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD)
                        return -EINVAL;
                if (params->sta_modify_mask & STATION_PARAM_APPLY_CAPABILITY)
                        return -EINVAL;
                if (params->link_sta_params.supported_rates)
                        return -EINVAL;
                if (params->ext_capab || params->link_sta_params.ht_capa ||
                    params->link_sta_params.vht_capa ||
                    params->link_sta_params.he_capa ||
                    params->link_sta_params.eht_capa)
                        return -EINVAL;
                if (params->sta_flags_mask & BIT(NL80211_STA_FLAG_SPP_AMSDU))
                        return -EINVAL;
        }

        if (statype != CFG80211_STA_AP_CLIENT &&
            statype != CFG80211_STA_AP_CLIENT_UNASSOC) {
                if (params->vlan)
                        return -EINVAL;
        }

        switch (statype) {
        case CFG80211_STA_AP_MLME_CLIENT:
                /* Use this only for authorizing/unauthorizing a station */
                if (!(params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED)))
                        return -EOPNOTSUPP;
                break;
        case CFG80211_STA_AP_CLIENT:
        case CFG80211_STA_AP_CLIENT_UNASSOC:
                /* accept only the listed bits */
                if (params->sta_flags_mask &
                                ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
                                  BIT(NL80211_STA_FLAG_AUTHENTICATED) |
                                  BIT(NL80211_STA_FLAG_ASSOCIATED) |
                                  BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
                                  BIT(NL80211_STA_FLAG_WME) |
                                  BIT(NL80211_STA_FLAG_MFP) |
                                  BIT(NL80211_STA_FLAG_SPP_AMSDU)))
                        return -EINVAL;

                /* but authenticated/associated only if driver handles it */
                if (!(wiphy->features & NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
                    params->sta_flags_mask &
                                (BIT(NL80211_STA_FLAG_AUTHENTICATED) |
                                 BIT(NL80211_STA_FLAG_ASSOCIATED)))
                        return -EINVAL;
                break;
        case CFG80211_STA_IBSS:
        case CFG80211_STA_AP_STA:
                /* reject any changes other than AUTHORIZED */
                if (params->sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED))
                        return -EINVAL;
                break;
        case CFG80211_STA_TDLS_PEER_SETUP:
                /* reject any changes other than AUTHORIZED or WME */
                if (params->sta_flags_mask & ~(BIT(NL80211_STA_FLAG_AUTHORIZED) |
                                               BIT(NL80211_STA_FLAG_WME)))
                        return -EINVAL;
                /* force (at least) rates when authorizing */
                if (params->sta_flags_set & BIT(NL80211_STA_FLAG_AUTHORIZED) &&
                    !params->link_sta_params.supported_rates)
                        return -EINVAL;
                break;
        case CFG80211_STA_TDLS_PEER_ACTIVE:
                /* reject any changes */
                return -EINVAL;
        case CFG80211_STA_MESH_PEER_KERNEL:
                if (params->sta_modify_mask & STATION_PARAM_APPLY_PLINK_STATE)
                        return -EINVAL;
                break;
        case CFG80211_STA_MESH_PEER_USER:
                if (params->plink_action != NL80211_PLINK_ACTION_NO_ACTION &&
                    params->plink_action != NL80211_PLINK_ACTION_BLOCK)
                        return -EINVAL;
                break;
        }

        /*
         * Older kernel versions ignored this attribute entirely, so don't
         * reject attempts to update it but mark it as unused instead so the
         * driver won't look at the data.
         */
        if (statype != CFG80211_STA_AP_CLIENT_UNASSOC &&
            statype != CFG80211_STA_TDLS_PEER_SETUP)
                params->link_sta_params.opmode_notif_used = false;

        return 0;
}
EXPORT_SYMBOL(cfg80211_check_station_change);

/*
 * Get vlan interface making sure it is running and on the right wiphy.
 */
static struct net_device *get_vlan(struct genl_info *info,
                                   struct cfg80211_registered_device *rdev)
{
        struct nlattr *vlanattr = info->attrs[NL80211_ATTR_STA_VLAN];
        struct net_device *v;
        int ret;

        if (!vlanattr)
                return NULL;

        v = dev_get_by_index(genl_info_net(info), nla_get_u32(vlanattr));
        if (!v)
                return ERR_PTR(-ENODEV);

        if (!v->ieee80211_ptr || v->ieee80211_ptr->wiphy != &rdev->wiphy) {
                ret = -EINVAL;
                goto error;
        }

        if (v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN &&
            v->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
            v->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO) {
                ret = -EINVAL;
                goto error;
        }

        if (!netif_running(v)) {
                ret = -ENETDOWN;
                goto error;
        }

        return v;
 error:
        dev_put(v);
        return ERR_PTR(ret);
}

static int nl80211_parse_sta_wme(struct genl_info *info,
                                 struct station_parameters *params)
{
        struct nlattr *tb[NL80211_STA_WME_MAX + 1];
        struct nlattr *nla;
        int err;

        /* parse WME attributes if present */
        if (!info->attrs[NL80211_ATTR_STA_WME])
                return 0;

        nla = info->attrs[NL80211_ATTR_STA_WME];
        err = nla_parse_nested_deprecated(tb, NL80211_STA_WME_MAX, nla,
                                          nl80211_sta_wme_policy,
                                          info->extack);
        if (err)
                return err;

        if (tb[NL80211_STA_WME_UAPSD_QUEUES])
                params->uapsd_queues = nla_get_u8(
                        tb[NL80211_STA_WME_UAPSD_QUEUES]);
        if (params->uapsd_queues & ~IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
                return -EINVAL;

        if (tb[NL80211_STA_WME_MAX_SP])
                params->max_sp = nla_get_u8(tb[NL80211_STA_WME_MAX_SP]);

        if (params->max_sp & ~IEEE80211_WMM_IE_STA_QOSINFO_SP_MASK)
                return -EINVAL;

        params->sta_modify_mask |= STATION_PARAM_APPLY_UAPSD;

        return 0;
}

static int nl80211_parse_sta_channel_info(struct genl_info *info,
                                      struct station_parameters *params)
{
        if (info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]) {
                params->supported_channels =
                     nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
                params->supported_channels_len =
                     nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_CHANNELS]);
                /*
                 * Need to include at least one (first channel, number of
                 * channels) tuple for each subband (checked in policy),
                 * and must have proper tuples for the rest of the data as well.
                 */
                if (params->supported_channels_len % 2)
                        return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]) {
                params->supported_oper_classes =
                 nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
                params->supported_oper_classes_len =
                  nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES]);
        }
        return 0;
}

static int nl80211_set_station_tdls(struct genl_info *info,
                                    struct station_parameters *params)
{
        int err;
        /* Dummy STA entry gets updated once the peer capabilities are known */
        if (info->attrs[NL80211_ATTR_PEER_AID])
                params->aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
        if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
                params->link_sta_params.ht_capa =
                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);
        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
                params->link_sta_params.vht_capa =
                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);
        if (info->attrs[NL80211_ATTR_HE_CAPABILITY]) {
                params->link_sta_params.he_capa =
                        nla_data(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
                params->link_sta_params.he_capa_len =
                        nla_len(info->attrs[NL80211_ATTR_HE_CAPABILITY]);

                if (info->attrs[NL80211_ATTR_EHT_CAPABILITY]) {
                        params->link_sta_params.eht_capa =
                                nla_data(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
                        params->link_sta_params.eht_capa_len =
                                nla_len(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);

                        if (!ieee80211_eht_capa_size_ok((const u8 *)params->link_sta_params.he_capa,
                                                        (const u8 *)params->link_sta_params.eht_capa,
                                                        params->link_sta_params.eht_capa_len,
                                                        false))
                                return -EINVAL;
                }
        }

        err = nl80211_parse_sta_channel_info(info, params);
        if (err)
                return err;

        return nl80211_parse_sta_wme(info, params);
}

static int nl80211_parse_sta_txpower_setting(struct genl_info *info,
                                             struct sta_txpwr *txpwr,
                                             bool *txpwr_set)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int idx;

        if (info->attrs[NL80211_ATTR_STA_TX_POWER_SETTING]) {
                if (!rdev->ops->set_tx_power ||
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                         NL80211_EXT_FEATURE_STA_TX_PWR))
                        return -EOPNOTSUPP;

                idx = NL80211_ATTR_STA_TX_POWER_SETTING;
                txpwr->type = nla_get_u8(info->attrs[idx]);

                if (txpwr->type == NL80211_TX_POWER_LIMITED) {
                        idx = NL80211_ATTR_STA_TX_POWER;

                        if (info->attrs[idx])
                                txpwr->power = nla_get_s16(info->attrs[idx]);
                        else
                                return -EINVAL;
                }

                *txpwr_set = true;
        } else {
                *txpwr_set = false;
        }

        return 0;
}

static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct station_parameters params;
        u8 *mac_addr;
        int err;

        memset(&params, 0, sizeof(params));

        if (!rdev->ops->change_station)
                return -EOPNOTSUPP;

        /*
         * AID and listen_interval properties can be set only for unassociated
         * station. Include these parameters here and will check them in
         * cfg80211_check_station_change().
         */
        if (info->attrs[NL80211_ATTR_STA_AID])
                params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);

        if (info->attrs[NL80211_ATTR_VLAN_ID])
                params.vlan_id = nla_get_u16(info->attrs[NL80211_ATTR_VLAN_ID]);

        if (info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
                params.listen_interval =
                     nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);
        else
                params.listen_interval = -1;

        if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS])
                params.support_p2p_ps =
                        nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
        else
                params.support_p2p_ps = -1;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        params.link_sta_params.link_id =
                nl80211_link_id_or_invalid(info->attrs);

        if (info->attrs[NL80211_ATTR_MLD_ADDR]) {
                /* If MLD_ADDR attribute is set then this is an MLD station
                 * and the MLD_ADDR attribute holds the MLD address and the
                 * MAC attribute holds for the LINK address.
                 * In that case, the link_id is also expected to be valid.
                 */
                if (params.link_sta_params.link_id < 0)
                        return -EINVAL;

                mac_addr = nla_data(info->attrs[NL80211_ATTR_MLD_ADDR]);
                params.link_sta_params.mld_mac = mac_addr;
                params.link_sta_params.link_mac =
                        nla_data(info->attrs[NL80211_ATTR_MAC]);
                if (!is_valid_ether_addr(params.link_sta_params.link_mac))
                        return -EINVAL;
        } else {
                mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
        }


        if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
                params.link_sta_params.supported_rates =
                        nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
                params.link_sta_params.supported_rates_len =
                        nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
        }

        if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
                params.capability =
                        nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
                params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
        }

        if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
                params.ext_capab =
                        nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
                params.ext_capab_len =
                        nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
        }

        if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
                params.plink_action =
                        nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

        if (info->attrs[NL80211_ATTR_STA_PLINK_STATE]) {
                params.plink_state =
                        nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_STATE]);
                if (info->attrs[NL80211_ATTR_MESH_PEER_AID])
                        params.peer_aid = nla_get_u16(
                                info->attrs[NL80211_ATTR_MESH_PEER_AID]);
                params.sta_modify_mask |= STATION_PARAM_APPLY_PLINK_STATE;
        }

        if (info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE])
                params.local_pm = nla_get_u32(
                        info->attrs[NL80211_ATTR_LOCAL_MESH_POWER_MODE]);

        if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
                params.link_sta_params.opmode_notif_used = true;
                params.link_sta_params.opmode_notif =
                        nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
        }

        if (info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY])
                params.link_sta_params.he_6ghz_capa =
                        nla_data(info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT])
                params.airtime_weight =
                        nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);

        if (params.airtime_weight &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
                return -EOPNOTSUPP;

        err = nl80211_parse_sta_txpower_setting(info,
                                                &params.link_sta_params.txpwr,
                                                &params.link_sta_params.txpwr_set);
        if (err)
                return err;

        /* Include parameters for TDLS peer (will check later) */
        err = nl80211_set_station_tdls(info, &params);
        if (err)
                return err;

        params.vlan = get_vlan(info, rdev);
        if (IS_ERR(params.vlan))
                return PTR_ERR(params.vlan);

        switch (dev->ieee80211_ptr->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_P2P_GO:
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_ADHOC:
        case NL80211_IFTYPE_MESH_POINT:
                break;
        default:
                err = -EOPNOTSUPP;
                goto out_put_vlan;
        }

        /* driver will call cfg80211_check_station_change() */
        err = rdev_change_station(rdev, dev, mac_addr, &params);

 out_put_vlan:
        dev_put(params.vlan);

        return err;
}

static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int err;
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct station_parameters params;
        u8 *mac_addr = NULL;
        u32 auth_assoc = BIT(NL80211_STA_FLAG_AUTHENTICATED) |
                         BIT(NL80211_STA_FLAG_ASSOCIATED);

        memset(&params, 0, sizeof(params));

        if (!rdev->ops->add_station)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_STA_AID] &&
            !info->attrs[NL80211_ATTR_PEER_AID])
                return -EINVAL;

        params.link_sta_params.link_id =
                nl80211_link_id_or_invalid(info->attrs);

        if (info->attrs[NL80211_ATTR_MLD_ADDR]) {
                mac_addr = nla_data(info->attrs[NL80211_ATTR_MLD_ADDR]);
                params.link_sta_params.mld_mac = mac_addr;
                params.link_sta_params.link_mac =
                        nla_data(info->attrs[NL80211_ATTR_MAC]);
                if (!is_valid_ether_addr(params.link_sta_params.link_mac))
                        return -EINVAL;
        } else {
                mac_addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
        }

        params.link_sta_params.supported_rates =
                nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
        params.link_sta_params.supported_rates_len =
                nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
        params.listen_interval =
                nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]);

        if (info->attrs[NL80211_ATTR_VLAN_ID])
                params.vlan_id = nla_get_u16(info->attrs[NL80211_ATTR_VLAN_ID]);

        if (info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]) {
                params.support_p2p_ps =
                        nla_get_u8(info->attrs[NL80211_ATTR_STA_SUPPORT_P2P_PS]);
        } else {
                /*
                 * if not specified, assume it's supported for P2P GO interface,
                 * and is NOT supported for AP interface
                 */
                params.support_p2p_ps =
                        dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO;
        }

        if (info->attrs[NL80211_ATTR_PEER_AID])
                params.aid = nla_get_u16(info->attrs[NL80211_ATTR_PEER_AID]);
        else
                params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]);

        if (info->attrs[NL80211_ATTR_STA_CAPABILITY]) {
                params.capability =
                        nla_get_u16(info->attrs[NL80211_ATTR_STA_CAPABILITY]);
                params.sta_modify_mask |= STATION_PARAM_APPLY_CAPABILITY;
        }

        if (info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]) {
                params.ext_capab =
                        nla_data(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
                params.ext_capab_len =
                        nla_len(info->attrs[NL80211_ATTR_STA_EXT_CAPABILITY]);
        }

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
                params.link_sta_params.ht_capa =
                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
                params.link_sta_params.vht_capa =
                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_HE_CAPABILITY]) {
                params.link_sta_params.he_capa =
                        nla_data(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
                params.link_sta_params.he_capa_len =
                        nla_len(info->attrs[NL80211_ATTR_HE_CAPABILITY]);

                if (info->attrs[NL80211_ATTR_EHT_CAPABILITY]) {
                        params.link_sta_params.eht_capa =
                                nla_data(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
                        params.link_sta_params.eht_capa_len =
                                nla_len(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);

                        if (!ieee80211_eht_capa_size_ok((const u8 *)params.link_sta_params.he_capa,
                                                        (const u8 *)params.link_sta_params.eht_capa,
                                                        params.link_sta_params.eht_capa_len,
                                                        false))
                                return -EINVAL;
                }
        }

        if (info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY])
                params.link_sta_params.he_6ghz_capa =
                        nla_data(info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
                params.link_sta_params.opmode_notif_used = true;
                params.link_sta_params.opmode_notif =
                        nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
        }

        if (info->attrs[NL80211_ATTR_STA_PLINK_ACTION])
                params.plink_action =
                        nla_get_u8(info->attrs[NL80211_ATTR_STA_PLINK_ACTION]);

        if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT])
                params.airtime_weight =
                        nla_get_u16(info->attrs[NL80211_ATTR_AIRTIME_WEIGHT]);

        if (params.airtime_weight &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_AIRTIME_FAIRNESS))
                return -EOPNOTSUPP;

        err = nl80211_parse_sta_txpower_setting(info,
                                                &params.link_sta_params.txpwr,
                                                &params.link_sta_params.txpwr_set);
        if (err)
                return err;

        err = nl80211_parse_sta_channel_info(info, &params);
        if (err)
                return err;

        err = nl80211_parse_sta_wme(info, &params);
        if (err)
                return err;

        if (parse_station_flags(info, dev->ieee80211_ptr->iftype, &params))
                return -EINVAL;

        /* HT/VHT requires QoS, but if we don't have that just ignore HT/VHT
         * as userspace might just pass through the capabilities from the IEs
         * directly, rather than enforcing this restriction and returning an
         * error in this case.
         */
        if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME))) {
                params.link_sta_params.ht_capa = NULL;
                params.link_sta_params.vht_capa = NULL;

                /* HE and EHT require WME */
                if (params.link_sta_params.he_capa_len ||
                    params.link_sta_params.he_6ghz_capa ||
                    params.link_sta_params.eht_capa_len)
                        return -EINVAL;
        }

        /* Ensure that HT/VHT capabilities are not set for 6 GHz HE STA */
        if (params.link_sta_params.he_6ghz_capa &&
            (params.link_sta_params.ht_capa || params.link_sta_params.vht_capa))
                return -EINVAL;

        /* When you run into this, adjust the code below for the new flag */
        BUILD_BUG_ON(NL80211_STA_FLAG_MAX != 8);

        switch (dev->ieee80211_ptr->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_P2P_GO:
                /* ignore WME attributes if iface/sta is not capable */
                if (!(rdev->wiphy.flags & WIPHY_FLAG_AP_UAPSD) ||
                    !(params.sta_flags_set & BIT(NL80211_STA_FLAG_WME)))
                        params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;

                /* TDLS peers cannot be added */
                if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
                    info->attrs[NL80211_ATTR_PEER_AID])
                        return -EINVAL;
                /* but don't bother the driver with it */
                params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_TDLS_PEER);

                /* allow authenticated/associated only if driver handles it */
                if (!(rdev->wiphy.features &
                                NL80211_FEATURE_FULL_AP_CLIENT_STATE) &&
                    params.sta_flags_mask & auth_assoc)
                        return -EINVAL;

                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT) &&
                    params.sta_flags_mask & BIT(NL80211_STA_FLAG_SPP_AMSDU))
                        return -EINVAL;

                /* Older userspace, or userspace wanting to be compatible with
                 * !NL80211_FEATURE_FULL_AP_CLIENT_STATE, will not set the auth
                 * and assoc flags in the mask, but assumes the station will be
                 * added as associated anyway since this was the required driver
                 * behaviour before NL80211_FEATURE_FULL_AP_CLIENT_STATE was
                 * introduced.
                 * In order to not bother drivers with this quirk in the API
                 * set the flags in both the mask and set for new stations in
                 * this case.
                 */
                if (!(params.sta_flags_mask & auth_assoc)) {
                        params.sta_flags_mask |= auth_assoc;
                        params.sta_flags_set |= auth_assoc;
                }

                /* must be last in here for error handling */
                params.vlan = get_vlan(info, rdev);
                if (IS_ERR(params.vlan))
                        return PTR_ERR(params.vlan);
                break;
        case NL80211_IFTYPE_MESH_POINT:
                /* ignore uAPSD data */
                params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;

                /* associated is disallowed */
                if (params.sta_flags_mask & BIT(NL80211_STA_FLAG_ASSOCIATED))
                        return -EINVAL;
                /* TDLS peers cannot be added */
                if ((params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)) ||
                    info->attrs[NL80211_ATTR_PEER_AID])
                        return -EINVAL;
                break;
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                /* ignore uAPSD data */
                params.sta_modify_mask &= ~STATION_PARAM_APPLY_UAPSD;

                /* these are disallowed */
                if (params.sta_flags_mask &
                                (BIT(NL80211_STA_FLAG_ASSOCIATED) |
                                 BIT(NL80211_STA_FLAG_AUTHENTICATED)))
                        return -EINVAL;
                /* Only TDLS peers can be added */
                if (!(params.sta_flags_set & BIT(NL80211_STA_FLAG_TDLS_PEER)))
                        return -EINVAL;
                /* Can only add if TDLS ... */
                if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS))
                        return -EOPNOTSUPP;
                /* ... with external setup is supported */
                if (!(rdev->wiphy.flags & WIPHY_FLAG_TDLS_EXTERNAL_SETUP))
                        return -EOPNOTSUPP;
                /*
                 * Older wpa_supplicant versions always mark the TDLS peer
                 * as authorized, but it shouldn't yet be.
                 */
                params.sta_flags_mask &= ~BIT(NL80211_STA_FLAG_AUTHORIZED);
                break;
        default:
                return -EOPNOTSUPP;
        }

        /* be aware of params.vlan when changing code here */

        if (wdev->valid_links) {
                if (params.link_sta_params.link_id < 0) {
                        err = -EINVAL;
                        goto out;
                }
                if (!(wdev->valid_links & BIT(params.link_sta_params.link_id))) {
                        err = -ENOLINK;
                        goto out;
                }
        } else {
                if (params.link_sta_params.link_id >= 0) {
                        err = -EINVAL;
                        goto out;
                }
        }
        err = rdev_add_station(rdev, dev, mac_addr, &params);
out:
        dev_put(params.vlan);
        return err;
}

static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct station_del_parameters params;
        int link_id = nl80211_link_id_or_invalid(info->attrs);

        memset(&params, 0, sizeof(params));

        if (info->attrs[NL80211_ATTR_MAC])
                params.mac = nla_data(info->attrs[NL80211_ATTR_MAC]);

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_MESH_POINT:
        case NL80211_IFTYPE_P2P_GO:
                /* always accept these */
                break;
        case NL80211_IFTYPE_ADHOC:
                /* conditionally accept */
                if (wiphy_ext_feature_isset(&rdev->wiphy,
                                            NL80211_EXT_FEATURE_DEL_IBSS_STA))
                        break;
                return -EINVAL;
        default:
                return -EINVAL;
        }

        if (!rdev->ops->del_station)
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_MGMT_SUBTYPE]) {
                params.subtype =
                        nla_get_u8(info->attrs[NL80211_ATTR_MGMT_SUBTYPE]);
                if (params.subtype != IEEE80211_STYPE_DISASSOC >> 4 &&
                    params.subtype != IEEE80211_STYPE_DEAUTH >> 4)
                        return -EINVAL;
        } else {
                /* Default to Deauthentication frame */
                params.subtype = IEEE80211_STYPE_DEAUTH >> 4;
        }

        if (info->attrs[NL80211_ATTR_REASON_CODE]) {
                params.reason_code =
                        nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
                if (params.reason_code == 0)
                        return -EINVAL; /* 0 is reserved */
        } else {
                /* Default to reason code 2 */
                params.reason_code = WLAN_REASON_PREV_AUTH_NOT_VALID;
        }

        /* Link ID not expected in case of non-ML operation */
        if (!wdev->valid_links && link_id != -1)
                return -EINVAL;

        /* If given, a valid link ID should be passed during MLO */
        if (wdev->valid_links && link_id >= 0 &&
            !(wdev->valid_links & BIT(link_id)))
                return -EINVAL;

        params.link_id = link_id;

        return rdev_del_station(rdev, dev, &params);
}

static int nl80211_send_mpath(struct sk_buff *msg, u32 portid, u32 seq,
                                int flags, struct net_device *dev,
                                u8 *dst, u8 *next_hop,
                                struct mpath_info *pinfo)
{
        void *hdr;
        struct nlattr *pinfoattr;

        hdr = nl80211hdr_put(msg, portid, seq, flags, NL80211_CMD_NEW_MPATH);
        if (!hdr)
                return -1;

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
            nla_put(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop) ||
            nla_put_u32(msg, NL80211_ATTR_GENERATION, pinfo->generation))
                goto nla_put_failure;

        pinfoattr = nla_nest_start_noflag(msg, NL80211_ATTR_MPATH_INFO);
        if (!pinfoattr)
                goto nla_put_failure;
        if ((pinfo->filled & MPATH_INFO_FRAME_QLEN) &&
            nla_put_u32(msg, NL80211_MPATH_INFO_FRAME_QLEN,
                        pinfo->frame_qlen))
                goto nla_put_failure;
        if (((pinfo->filled & MPATH_INFO_SN) &&
             nla_put_u32(msg, NL80211_MPATH_INFO_SN, pinfo->sn)) ||
            ((pinfo->filled & MPATH_INFO_METRIC) &&
             nla_put_u32(msg, NL80211_MPATH_INFO_METRIC,
                         pinfo->metric)) ||
            ((pinfo->filled & MPATH_INFO_EXPTIME) &&
             nla_put_u32(msg, NL80211_MPATH_INFO_EXPTIME,
                         pinfo->exptime)) ||
            ((pinfo->filled & MPATH_INFO_FLAGS) &&
             nla_put_u8(msg, NL80211_MPATH_INFO_FLAGS,
                        pinfo->flags)) ||
            ((pinfo->filled & MPATH_INFO_DISCOVERY_TIMEOUT) &&
             nla_put_u32(msg, NL80211_MPATH_INFO_DISCOVERY_TIMEOUT,
                         pinfo->discovery_timeout)) ||
            ((pinfo->filled & MPATH_INFO_DISCOVERY_RETRIES) &&
             nla_put_u8(msg, NL80211_MPATH_INFO_DISCOVERY_RETRIES,
                        pinfo->discovery_retries)) ||
            ((pinfo->filled & MPATH_INFO_HOP_COUNT) &&
             nla_put_u8(msg, NL80211_MPATH_INFO_HOP_COUNT,
                        pinfo->hop_count)) ||
            ((pinfo->filled & MPATH_INFO_PATH_CHANGE) &&
             nla_put_u32(msg, NL80211_MPATH_INFO_PATH_CHANGE,
                         pinfo->path_change_count)))
                goto nla_put_failure;

        nla_nest_end(msg, pinfoattr);

        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_dump_mpath(struct sk_buff *skb,
                              struct netlink_callback *cb)
{
        struct mpath_info pinfo;
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        u8 dst[ETH_ALEN];
        u8 next_hop[ETH_ALEN];
        int path_idx = cb->args[2];
        int err;

        err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
        if (err)
                return err;
        /* nl80211_prepare_wdev_dump acquired it in the successful case */
        __acquire(&rdev->wiphy.mtx);

        if (!rdev->ops->dump_mpath) {
                err = -EOPNOTSUPP;
                goto out_err;
        }

        if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
                err = -EOPNOTSUPP;
                goto out_err;
        }

        while (1) {
                err = rdev_dump_mpath(rdev, wdev->netdev, path_idx, dst,
                                      next_hop, &pinfo);
                if (err == -ENOENT)
                        break;
                if (err)
                        goto out_err;

                if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
                                       cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                       wdev->netdev, dst, next_hop,
                                       &pinfo) < 0)
                        goto out;

                path_idx++;
        }

 out:
        cb->args[2] = path_idx;
        err = skb->len;
 out_err:
        wiphy_unlock(&rdev->wiphy);
        return err;
}

static int nl80211_get_mpath(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int err;
        struct net_device *dev = info->user_ptr[1];
        struct mpath_info pinfo;
        struct sk_buff *msg;
        u8 *dst = NULL;
        u8 next_hop[ETH_ALEN];

        memset(&pinfo, 0, sizeof(pinfo));

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        dst = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (!rdev->ops->get_mpath)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        err = rdev_get_mpath(rdev, dev, dst, next_hop, &pinfo);
        if (err)
                return err;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
                                 dev, dst, next_hop, &pinfo) < 0) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return genlmsg_reply(msg, info);
}

static int nl80211_set_mpath(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        u8 *dst = NULL;
        u8 *next_hop = NULL;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
                return -EINVAL;

        dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
        next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);

        if (!rdev->ops->change_mpath)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        return rdev_change_mpath(rdev, dev, dst, next_hop);
}

static int nl80211_new_mpath(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        u8 *dst = NULL;
        u8 *next_hop = NULL;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_MPATH_NEXT_HOP])
                return -EINVAL;

        dst = nla_data(info->attrs[NL80211_ATTR_MAC]);
        next_hop = nla_data(info->attrs[NL80211_ATTR_MPATH_NEXT_HOP]);

        if (!rdev->ops->add_mpath)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        return rdev_add_mpath(rdev, dev, dst, next_hop);
}

static int nl80211_del_mpath(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        u8 *dst = NULL;

        if (info->attrs[NL80211_ATTR_MAC])
                dst = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (!rdev->ops->del_mpath)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        return rdev_del_mpath(rdev, dev, dst);
}

static int nl80211_get_mpp(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        int err;
        struct net_device *dev = info->user_ptr[1];
        struct mpath_info pinfo;
        struct sk_buff *msg;
        u8 *dst = NULL;
        u8 mpp[ETH_ALEN];

        memset(&pinfo, 0, sizeof(pinfo));

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        dst = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (!rdev->ops->get_mpp)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        err = rdev_get_mpp(rdev, dev, dst, mpp, &pinfo);
        if (err)
                return err;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        if (nl80211_send_mpath(msg, info->snd_portid, info->snd_seq, 0,
                               dev, dst, mpp, &pinfo) < 0) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return genlmsg_reply(msg, info);
}

static int nl80211_dump_mpp(struct sk_buff *skb,
                            struct netlink_callback *cb)
{
        struct mpath_info pinfo;
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        u8 dst[ETH_ALEN];
        u8 mpp[ETH_ALEN];
        int path_idx = cb->args[2];
        int err;

        err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, NULL);
        if (err)
                return err;
        /* nl80211_prepare_wdev_dump acquired it in the successful case */
        __acquire(&rdev->wiphy.mtx);

        if (!rdev->ops->dump_mpp) {
                err = -EOPNOTSUPP;
                goto out_err;
        }

        if (wdev->iftype != NL80211_IFTYPE_MESH_POINT) {
                err = -EOPNOTSUPP;
                goto out_err;
        }

        while (1) {
                err = rdev_dump_mpp(rdev, wdev->netdev, path_idx, dst,
                                    mpp, &pinfo);
                if (err == -ENOENT)
                        break;
                if (err)
                        goto out_err;

                if (nl80211_send_mpath(skb, NETLINK_CB(cb->skb).portid,
                                       cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                       wdev->netdev, dst, mpp,
                                       &pinfo) < 0)
                        goto out;

                path_idx++;
        }

 out:
        cb->args[2] = path_idx;
        err = skb->len;
 out_err:
        wiphy_unlock(&rdev->wiphy);
        return err;
}

static int nl80211_set_bss(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct bss_parameters params;

        memset(&params, 0, sizeof(params));
        params.link_id = nl80211_link_id_or_invalid(info->attrs);
        /* default to not changing parameters */
        params.use_cts_prot = -1;
        params.use_short_preamble = -1;
        params.use_short_slot_time = -1;
        params.ap_isolate = -1;
        params.ht_opmode = -1;
        params.p2p_ctwindow = -1;
        params.p2p_opp_ps = -1;

        if (info->attrs[NL80211_ATTR_BSS_CTS_PROT])
                params.use_cts_prot =
                    nla_get_u8(info->attrs[NL80211_ATTR_BSS_CTS_PROT]);
        if (info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE])
                params.use_short_preamble =
                    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_PREAMBLE]);
        if (info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME])
                params.use_short_slot_time =
                    nla_get_u8(info->attrs[NL80211_ATTR_BSS_SHORT_SLOT_TIME]);
        if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
                params.basic_rates =
                        nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
                params.basic_rates_len =
                        nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
        }
        if (info->attrs[NL80211_ATTR_AP_ISOLATE])
                params.ap_isolate = !!nla_get_u8(info->attrs[NL80211_ATTR_AP_ISOLATE]);
        if (info->attrs[NL80211_ATTR_BSS_HT_OPMODE])
                params.ht_opmode =
                        nla_get_u16(info->attrs[NL80211_ATTR_BSS_HT_OPMODE]);

        if (info->attrs[NL80211_ATTR_P2P_CTWINDOW]) {
                if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                        return -EINVAL;
                params.p2p_ctwindow =
                        nla_get_u8(info->attrs[NL80211_ATTR_P2P_CTWINDOW]);
                if (params.p2p_ctwindow != 0 &&
                    !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN))
                        return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_P2P_OPPPS]) {
                u8 tmp;

                if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                        return -EINVAL;
                tmp = nla_get_u8(info->attrs[NL80211_ATTR_P2P_OPPPS]);
                params.p2p_opp_ps = tmp;
                if (params.p2p_opp_ps &&
                    !(rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS))
                        return -EINVAL;
        }

        if (!rdev->ops->change_bss)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                return -EOPNOTSUPP;

        return rdev_change_bss(rdev, dev, &params);
}

static int nl80211_req_set_reg(struct sk_buff *skb, struct genl_info *info)
{
        char *data = NULL;
        bool is_indoor;
        enum nl80211_user_reg_hint_type user_reg_hint_type;
        u32 owner_nlportid;

        /*
         * You should only get this when cfg80211 hasn't yet initialized
         * completely when built-in to the kernel right between the time
         * window between nl80211_init() and regulatory_init(), if that is
         * even possible.
         */
        if (unlikely(!rcu_access_pointer(cfg80211_regdomain)))
                return -EINPROGRESS;

        if (info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE])
                user_reg_hint_type =
                  nla_get_u32(info->attrs[NL80211_ATTR_USER_REG_HINT_TYPE]);
        else
                user_reg_hint_type = NL80211_USER_REG_HINT_USER;

        switch (user_reg_hint_type) {
        case NL80211_USER_REG_HINT_USER:
        case NL80211_USER_REG_HINT_CELL_BASE:
                if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
                        return -EINVAL;

                data = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);
                return regulatory_hint_user(data, user_reg_hint_type);
        case NL80211_USER_REG_HINT_INDOOR:
                if (info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
                        owner_nlportid = info->snd_portid;
                        is_indoor = !!info->attrs[NL80211_ATTR_REG_INDOOR];
                } else {
                        owner_nlportid = 0;
                        is_indoor = true;
                }

                regulatory_hint_indoor(is_indoor, owner_nlportid);
                return 0;
        default:
                return -EINVAL;
        }
}

static int nl80211_reload_regdb(struct sk_buff *skb, struct genl_info *info)
{
        return reg_reload_regdb();
}

static int nl80211_get_mesh_config(struct sk_buff *skb,
                                   struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct mesh_config cur_params;
        int err = 0;
        void *hdr;
        struct nlattr *pinfoattr;
        struct sk_buff *msg;

        if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        if (!rdev->ops->get_mesh_config)
                return -EOPNOTSUPP;

        /* If not connected, get default parameters */
        if (!wdev->u.mesh.id_len)
                memcpy(&cur_params, &default_mesh_config, sizeof(cur_params));
        else
                err = rdev_get_mesh_config(rdev, dev, &cur_params);

        if (err)
                return err;

        /* Draw up a netlink message to send back */
        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;
        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_MESH_CONFIG);
        if (!hdr)
                goto out;
        pinfoattr = nla_nest_start_noflag(msg, NL80211_ATTR_MESH_CONFIG);
        if (!pinfoattr)
                goto nla_put_failure;
        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put_u16(msg, NL80211_MESHCONF_RETRY_TIMEOUT,
                        cur_params.dot11MeshRetryTimeout) ||
            nla_put_u16(msg, NL80211_MESHCONF_CONFIRM_TIMEOUT,
                        cur_params.dot11MeshConfirmTimeout) ||
            nla_put_u16(msg, NL80211_MESHCONF_HOLDING_TIMEOUT,
                        cur_params.dot11MeshHoldingTimeout) ||
            nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
                        cur_params.dot11MeshMaxPeerLinks) ||
            nla_put_u8(msg, NL80211_MESHCONF_MAX_RETRIES,
                       cur_params.dot11MeshMaxRetries) ||
            nla_put_u8(msg, NL80211_MESHCONF_TTL,
                       cur_params.dot11MeshTTL) ||
            nla_put_u8(msg, NL80211_MESHCONF_ELEMENT_TTL,
                       cur_params.element_ttl) ||
            nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
                       cur_params.auto_open_plinks) ||
            nla_put_u32(msg, NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
                        cur_params.dot11MeshNbrOffsetMaxNeighbor) ||
            nla_put_u8(msg, NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
                       cur_params.dot11MeshHWMPmaxPREQretries) ||
            nla_put_u32(msg, NL80211_MESHCONF_PATH_REFRESH_TIME,
                        cur_params.path_refresh_time) ||
            nla_put_u16(msg, NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
                        cur_params.min_discovery_timeout) ||
            nla_put_u32(msg, NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
                        cur_params.dot11MeshHWMPactivePathTimeout) ||
            nla_put_u16(msg, NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
                        cur_params.dot11MeshHWMPpreqMinInterval) ||
            nla_put_u16(msg, NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
                        cur_params.dot11MeshHWMPperrMinInterval) ||
            nla_put_u16(msg, NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
                        cur_params.dot11MeshHWMPnetDiameterTraversalTime) ||
            nla_put_u8(msg, NL80211_MESHCONF_HWMP_ROOTMODE,
                       cur_params.dot11MeshHWMPRootMode) ||
            nla_put_u16(msg, NL80211_MESHCONF_HWMP_RANN_INTERVAL,
                        cur_params.dot11MeshHWMPRannInterval) ||
            nla_put_u8(msg, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
                       cur_params.dot11MeshGateAnnouncementProtocol) ||
            nla_put_u8(msg, NL80211_MESHCONF_FORWARDING,
                       cur_params.dot11MeshForwarding) ||
            nla_put_s32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
                        cur_params.rssi_threshold) ||
            nla_put_u32(msg, NL80211_MESHCONF_HT_OPMODE,
                        cur_params.ht_opmode) ||
            nla_put_u32(msg, NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
                        cur_params.dot11MeshHWMPactivePathToRootTimeout) ||
            nla_put_u16(msg, NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
                        cur_params.dot11MeshHWMProotInterval) ||
            nla_put_u16(msg, NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
                        cur_params.dot11MeshHWMPconfirmationInterval) ||
            nla_put_u32(msg, NL80211_MESHCONF_POWER_MODE,
                        cur_params.power_mode) ||
            nla_put_u16(msg, NL80211_MESHCONF_AWAKE_WINDOW,
                        cur_params.dot11MeshAwakeWindowDuration) ||
            nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
                        cur_params.plink_timeout) ||
            nla_put_u8(msg, NL80211_MESHCONF_CONNECTED_TO_GATE,
                       cur_params.dot11MeshConnectedToMeshGate) ||
            nla_put_u8(msg, NL80211_MESHCONF_NOLEARN,
                       cur_params.dot11MeshNolearn) ||
            nla_put_u8(msg, NL80211_MESHCONF_CONNECTED_TO_AS,
                       cur_params.dot11MeshConnectedToAuthServer))
                goto nla_put_failure;
        nla_nest_end(msg, pinfoattr);
        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

 nla_put_failure:
 out:
        nlmsg_free(msg);
        return -ENOBUFS;
}

static const struct nla_policy
nl80211_meshconf_params_policy[NL80211_MESHCONF_ATTR_MAX+1] = {
        [NL80211_MESHCONF_RETRY_TIMEOUT] =
                NLA_POLICY_RANGE(NLA_U16, 1, 255),
        [NL80211_MESHCONF_CONFIRM_TIMEOUT] =
                NLA_POLICY_RANGE(NLA_U16, 1, 255),
        [NL80211_MESHCONF_HOLDING_TIMEOUT] =
                NLA_POLICY_RANGE(NLA_U16, 1, 255),
        [NL80211_MESHCONF_MAX_PEER_LINKS] =
                NLA_POLICY_RANGE(NLA_U16, 0, 255),
        [NL80211_MESHCONF_MAX_RETRIES] = NLA_POLICY_MAX(NLA_U8, 16),
        [NL80211_MESHCONF_TTL] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_MESHCONF_ELEMENT_TTL] = NLA_POLICY_MIN(NLA_U8, 1),
        [NL80211_MESHCONF_AUTO_OPEN_PLINKS] = NLA_POLICY_MAX(NLA_U8, 1),
        [NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR] =
                NLA_POLICY_RANGE(NLA_U32, 1, 255),
        [NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES] = { .type = NLA_U8 },
        [NL80211_MESHCONF_PATH_REFRESH_TIME] = { .type = NLA_U32 },
        [NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT] = NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT] = { .type = NLA_U32 },
        [NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL] =
                NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL] =
                NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME] =
                NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_HWMP_ROOTMODE] = NLA_POLICY_MAX(NLA_U8, 4),
        [NL80211_MESHCONF_HWMP_RANN_INTERVAL] =
                NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_GATE_ANNOUNCEMENTS] = NLA_POLICY_MAX(NLA_U8, 1),
        [NL80211_MESHCONF_FORWARDING] = NLA_POLICY_MAX(NLA_U8, 1),
        [NL80211_MESHCONF_RSSI_THRESHOLD] =
                NLA_POLICY_RANGE(NLA_S32, -255, 0),
        [NL80211_MESHCONF_HT_OPMODE] = { .type = NLA_U16 },
        [NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT] = { .type = NLA_U32 },
        [NL80211_MESHCONF_HWMP_ROOT_INTERVAL] =
                NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL] =
                NLA_POLICY_MIN(NLA_U16, 1),
        [NL80211_MESHCONF_POWER_MODE] =
                NLA_POLICY_RANGE(NLA_U32,
                                 NL80211_MESH_POWER_ACTIVE,
                                 NL80211_MESH_POWER_MAX),
        [NL80211_MESHCONF_AWAKE_WINDOW] = { .type = NLA_U16 },
        [NL80211_MESHCONF_PLINK_TIMEOUT] = { .type = NLA_U32 },
        [NL80211_MESHCONF_CONNECTED_TO_GATE] = NLA_POLICY_RANGE(NLA_U8, 0, 1),
        [NL80211_MESHCONF_NOLEARN] = NLA_POLICY_RANGE(NLA_U8, 0, 1),
        [NL80211_MESHCONF_CONNECTED_TO_AS] = NLA_POLICY_RANGE(NLA_U8, 0, 1),
};

static const struct nla_policy
        nl80211_mesh_setup_params_policy[NL80211_MESH_SETUP_ATTR_MAX+1] = {
        [NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC] = { .type = NLA_U8 },
        [NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL] = { .type = NLA_U8 },
        [NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC] = { .type = NLA_U8 },
        [NL80211_MESH_SETUP_USERSPACE_AUTH] = { .type = NLA_FLAG },
        [NL80211_MESH_SETUP_AUTH_PROTOCOL] = { .type = NLA_U8 },
        [NL80211_MESH_SETUP_USERSPACE_MPM] = { .type = NLA_FLAG },
        [NL80211_MESH_SETUP_IE] =
                NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_ie_attr,
                                       IEEE80211_MAX_DATA_LEN),
        [NL80211_MESH_SETUP_USERSPACE_AMPE] = { .type = NLA_FLAG },
};

static int nl80211_parse_mesh_config(struct genl_info *info,
                                     struct mesh_config *cfg,
                                     u32 *mask_out)
{
        struct nlattr *tb[NL80211_MESHCONF_ATTR_MAX + 1];
        u32 mask = 0;
        u16 ht_opmode;

#define FILL_IN_MESH_PARAM_IF_SET(tb, cfg, param, mask, attr, fn)        \
do {                                                                        \
        if (tb[attr]) {                                                        \
                cfg->param = fn(tb[attr]);                                \
                mask |= BIT((attr) - 1);                                \
        }                                                                \
} while (0)

        if (!info->attrs[NL80211_ATTR_MESH_CONFIG])
                return -EINVAL;
        if (nla_parse_nested_deprecated(tb, NL80211_MESHCONF_ATTR_MAX, info->attrs[NL80211_ATTR_MESH_CONFIG], nl80211_meshconf_params_policy, info->extack))
                return -EINVAL;

        /* This makes sure that there aren't more than 32 mesh config
         * parameters (otherwise our bitfield scheme would not work.) */
        BUILD_BUG_ON(NL80211_MESHCONF_ATTR_MAX > 32);

        /* Fill in the params struct */
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshRetryTimeout, mask,
                                  NL80211_MESHCONF_RETRY_TIMEOUT, nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConfirmTimeout, mask,
                                  NL80211_MESHCONF_CONFIRM_TIMEOUT,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHoldingTimeout, mask,
                                  NL80211_MESHCONF_HOLDING_TIMEOUT,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxPeerLinks, mask,
                                  NL80211_MESHCONF_MAX_PEER_LINKS,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshMaxRetries, mask,
                                  NL80211_MESHCONF_MAX_RETRIES, nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshTTL, mask,
                                  NL80211_MESHCONF_TTL, nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, element_ttl, mask,
                                  NL80211_MESHCONF_ELEMENT_TTL, nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, auto_open_plinks, mask,
                                  NL80211_MESHCONF_AUTO_OPEN_PLINKS,
                                  nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNbrOffsetMaxNeighbor,
                                  mask,
                                  NL80211_MESHCONF_SYNC_OFFSET_MAX_NEIGHBOR,
                                  nla_get_u32);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPmaxPREQretries, mask,
                                  NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES,
                                  nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, path_refresh_time, mask,
                                  NL80211_MESHCONF_PATH_REFRESH_TIME,
                                  nla_get_u32);
        if (mask & BIT(NL80211_MESHCONF_PATH_REFRESH_TIME) &&
            (cfg->path_refresh_time < 1 || cfg->path_refresh_time > 65535))
                return -EINVAL;
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, min_discovery_timeout, mask,
                                  NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPactivePathTimeout,
                                  mask,
                                  NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT,
                                  nla_get_u32);
        if (mask & BIT(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT) &&
            (cfg->dot11MeshHWMPactivePathTimeout < 1 ||
             cfg->dot11MeshHWMPactivePathTimeout > 65535))
                return -EINVAL;
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPpreqMinInterval, mask,
                                  NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPperrMinInterval, mask,
                                  NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
                                  dot11MeshHWMPnetDiameterTraversalTime, mask,
                                  NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRootMode, mask,
                                  NL80211_MESHCONF_HWMP_ROOTMODE, nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPRannInterval, mask,
                                  NL80211_MESHCONF_HWMP_RANN_INTERVAL,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshGateAnnouncementProtocol,
                                  mask, NL80211_MESHCONF_GATE_ANNOUNCEMENTS,
                                  nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshForwarding, mask,
                                  NL80211_MESHCONF_FORWARDING, nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, rssi_threshold, mask,
                                  NL80211_MESHCONF_RSSI_THRESHOLD,
                                  nla_get_s32);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConnectedToMeshGate, mask,
                                  NL80211_MESHCONF_CONNECTED_TO_GATE,
                                  nla_get_u8);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshConnectedToAuthServer, mask,
                                  NL80211_MESHCONF_CONNECTED_TO_AS,
                                  nla_get_u8);
        /*
         * Check HT operation mode based on
         * IEEE 802.11-2016 9.4.2.57 HT Operation element.
         */
        if (tb[NL80211_MESHCONF_HT_OPMODE]) {
                ht_opmode = nla_get_u16(tb[NL80211_MESHCONF_HT_OPMODE]);

                if (ht_opmode & ~(IEEE80211_HT_OP_MODE_PROTECTION |
                                  IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT |
                                  IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT))
                        return -EINVAL;

                /* NON_HT_STA bit is reserved, but some programs set it */
                ht_opmode &= ~IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT;

                cfg->ht_opmode = ht_opmode;
                mask |= (1 << (NL80211_MESHCONF_HT_OPMODE - 1));
        }
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg,
                                  dot11MeshHWMPactivePathToRootTimeout, mask,
                                  NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT,
                                  nla_get_u32);
        if (mask & BIT(NL80211_MESHCONF_HWMP_PATH_TO_ROOT_TIMEOUT) &&
            (cfg->dot11MeshHWMPactivePathToRootTimeout < 1 ||
             cfg->dot11MeshHWMPactivePathToRootTimeout > 65535))
                return -EINVAL;
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMProotInterval, mask,
                                  NL80211_MESHCONF_HWMP_ROOT_INTERVAL,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshHWMPconfirmationInterval,
                                  mask,
                                  NL80211_MESHCONF_HWMP_CONFIRMATION_INTERVAL,
                                  nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, power_mode, mask,
                                  NL80211_MESHCONF_POWER_MODE, nla_get_u32);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshAwakeWindowDuration, mask,
                                  NL80211_MESHCONF_AWAKE_WINDOW, nla_get_u16);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, plink_timeout, mask,
                                  NL80211_MESHCONF_PLINK_TIMEOUT, nla_get_u32);
        FILL_IN_MESH_PARAM_IF_SET(tb, cfg, dot11MeshNolearn, mask,
                                  NL80211_MESHCONF_NOLEARN, nla_get_u8);
        if (mask_out)
                *mask_out = mask;

        return 0;

#undef FILL_IN_MESH_PARAM_IF_SET
}

static int nl80211_parse_mesh_setup(struct genl_info *info,
                                     struct mesh_setup *setup)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct nlattr *tb[NL80211_MESH_SETUP_ATTR_MAX + 1];

        if (!info->attrs[NL80211_ATTR_MESH_SETUP])
                return -EINVAL;
        if (nla_parse_nested_deprecated(tb, NL80211_MESH_SETUP_ATTR_MAX, info->attrs[NL80211_ATTR_MESH_SETUP], nl80211_mesh_setup_params_policy, info->extack))
                return -EINVAL;

        if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])
                setup->sync_method =
                (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_SYNC])) ?
                 IEEE80211_SYNC_METHOD_VENDOR :
                 IEEE80211_SYNC_METHOD_NEIGHBOR_OFFSET;

        if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])
                setup->path_sel_proto =
                (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_PATH_SEL])) ?
                 IEEE80211_PATH_PROTOCOL_VENDOR :
                 IEEE80211_PATH_PROTOCOL_HWMP;

        if (tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])
                setup->path_metric =
                (nla_get_u8(tb[NL80211_MESH_SETUP_ENABLE_VENDOR_METRIC])) ?
                 IEEE80211_PATH_METRIC_VENDOR :
                 IEEE80211_PATH_METRIC_AIRTIME;

        if (tb[NL80211_MESH_SETUP_IE]) {
                struct nlattr *ieattr =
                        tb[NL80211_MESH_SETUP_IE];
                setup->ie = nla_data(ieattr);
                setup->ie_len = nla_len(ieattr);
        }
        if (tb[NL80211_MESH_SETUP_USERSPACE_MPM] &&
            !(rdev->wiphy.features & NL80211_FEATURE_USERSPACE_MPM))
                return -EINVAL;
        setup->user_mpm = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_MPM]);
        setup->is_authenticated = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AUTH]);
        setup->is_secure = nla_get_flag(tb[NL80211_MESH_SETUP_USERSPACE_AMPE]);
        if (setup->is_secure)
                setup->user_mpm = true;

        if (tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]) {
                if (!setup->user_mpm)
                        return -EINVAL;
                setup->auth_id =
                        nla_get_u8(tb[NL80211_MESH_SETUP_AUTH_PROTOCOL]);
        }

        return 0;
}

static int nl80211_update_mesh_config(struct sk_buff *skb,
                                      struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct mesh_config cfg = {};
        u32 mask;
        int err;

        if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        if (!rdev->ops->update_mesh_config)
                return -EOPNOTSUPP;

        err = nl80211_parse_mesh_config(info, &cfg, &mask);
        if (err)
                return err;

        if (!wdev->u.mesh.id_len)
                err = -ENOLINK;

        if (!err)
                err = rdev_update_mesh_config(rdev, dev, mask, &cfg);

        return err;
}

static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
                              struct sk_buff *msg)
{
        struct nlattr *nl_reg_rules;
        unsigned int i;

        if (nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, regdom->alpha2) ||
            (regdom->dfs_region &&
             nla_put_u8(msg, NL80211_ATTR_DFS_REGION, regdom->dfs_region)))
                goto nla_put_failure;

        nl_reg_rules = nla_nest_start_noflag(msg, NL80211_ATTR_REG_RULES);
        if (!nl_reg_rules)
                goto nla_put_failure;

        for (i = 0; i < regdom->n_reg_rules; i++) {
                struct nlattr *nl_reg_rule;
                const struct ieee80211_reg_rule *reg_rule;
                const struct ieee80211_freq_range *freq_range;
                const struct ieee80211_power_rule *power_rule;
                unsigned int max_bandwidth_khz;

                reg_rule = &regdom->reg_rules[i];
                freq_range = &reg_rule->freq_range;
                power_rule = &reg_rule->power_rule;

                nl_reg_rule = nla_nest_start_noflag(msg, i);
                if (!nl_reg_rule)
                        goto nla_put_failure;

                max_bandwidth_khz = freq_range->max_bandwidth_khz;
                if (!max_bandwidth_khz)
                        max_bandwidth_khz = reg_get_max_bandwidth(regdom,
                                                                  reg_rule);

                if (nla_put_u32(msg, NL80211_ATTR_REG_RULE_FLAGS,
                                reg_rule->flags) ||
                    nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_START,
                                freq_range->start_freq_khz) ||
                    nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_END,
                                freq_range->end_freq_khz) ||
                    nla_put_u32(msg, NL80211_ATTR_FREQ_RANGE_MAX_BW,
                                max_bandwidth_khz) ||
                    nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN,
                                power_rule->max_antenna_gain) ||
                    nla_put_u32(msg, NL80211_ATTR_POWER_RULE_MAX_EIRP,
                                power_rule->max_eirp) ||
                    nla_put_u32(msg, NL80211_ATTR_DFS_CAC_TIME,
                                reg_rule->dfs_cac_ms))
                        goto nla_put_failure;

                if ((reg_rule->flags & NL80211_RRF_PSD) &&
                    nla_put_s8(msg, NL80211_ATTR_POWER_RULE_PSD,
                               reg_rule->psd))
                        goto nla_put_failure;

                nla_nest_end(msg, nl_reg_rule);
        }

        nla_nest_end(msg, nl_reg_rules);
        return 0;

nla_put_failure:
        return -EMSGSIZE;
}

static int nl80211_get_reg_do(struct sk_buff *skb, struct genl_info *info)
{
        const struct ieee80211_regdomain *regdom = NULL;
        struct cfg80211_registered_device *rdev;
        struct wiphy *wiphy = NULL;
        struct sk_buff *msg;
        int err = -EMSGSIZE;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOBUFS;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_REG);
        if (!hdr)
                goto put_failure;

        rtnl_lock();

        if (info->attrs[NL80211_ATTR_WIPHY]) {
                bool self_managed;

                rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
                if (IS_ERR(rdev)) {
                        err = PTR_ERR(rdev);
                        goto nla_put_failure;
                }

                wiphy = &rdev->wiphy;
                self_managed = wiphy->regulatory_flags &
                               REGULATORY_WIPHY_SELF_MANAGED;

                rcu_read_lock();

                regdom = get_wiphy_regdom(wiphy);

                /* a self-managed-reg device must have a private regdom */
                if (WARN_ON(!regdom && self_managed)) {
                        err = -EINVAL;
                        goto nla_put_failure_rcu;
                }

                if (regdom &&
                    nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
                        goto nla_put_failure_rcu;
        } else {
                rcu_read_lock();
        }

        if (!wiphy && reg_last_request_cell_base() &&
            nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
                        NL80211_USER_REG_HINT_CELL_BASE))
                goto nla_put_failure_rcu;

        if (!regdom)
                regdom = rcu_dereference(cfg80211_regdomain);

        if (nl80211_put_regdom(regdom, msg))
                goto nla_put_failure_rcu;

        rcu_read_unlock();

        genlmsg_end(msg, hdr);
        rtnl_unlock();
        return genlmsg_reply(msg, info);

nla_put_failure_rcu:
        rcu_read_unlock();
nla_put_failure:
        rtnl_unlock();
put_failure:
        nlmsg_free(msg);
        return err;
}

static int nl80211_send_regdom(struct sk_buff *msg, struct netlink_callback *cb,
                               u32 seq, int flags, struct wiphy *wiphy,
                               const struct ieee80211_regdomain *regdom)
{
        void *hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
                                   NL80211_CMD_GET_REG);

        if (!hdr)
                return -1;

        genl_dump_check_consistent(cb, hdr);

        if (nl80211_put_regdom(regdom, msg))
                goto nla_put_failure;

        if (!wiphy && reg_last_request_cell_base() &&
            nla_put_u32(msg, NL80211_ATTR_USER_REG_HINT_TYPE,
                        NL80211_USER_REG_HINT_CELL_BASE))
                goto nla_put_failure;

        if (wiphy &&
            nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
                goto nla_put_failure;

        if (wiphy && wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
            nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return 0;

nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_get_reg_dump(struct sk_buff *skb,
                                struct netlink_callback *cb)
{
        const struct ieee80211_regdomain *regdom = NULL;
        struct cfg80211_registered_device *rdev;
        int err, reg_idx, start = cb->args[2];

        rcu_read_lock();

        if (cfg80211_regdomain && start == 0) {
                err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
                                          NLM_F_MULTI, NULL,
                                          rcu_dereference(cfg80211_regdomain));
                if (err < 0)
                        goto out_err;
        }

        /* the global regdom is idx 0 */
        reg_idx = 1;
        list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
                regdom = get_wiphy_regdom(&rdev->wiphy);
                if (!regdom)
                        continue;

                if (++reg_idx <= start)
                        continue;

                err = nl80211_send_regdom(skb, cb, cb->nlh->nlmsg_seq,
                                          NLM_F_MULTI, &rdev->wiphy, regdom);
                if (err < 0) {
                        reg_idx--;
                        break;
                }
        }

        cb->args[2] = reg_idx;
        err = skb->len;
out_err:
        rcu_read_unlock();
        return err;
}

#ifdef CONFIG_CFG80211_CRDA_SUPPORT
static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] = {
        [NL80211_ATTR_REG_RULE_FLAGS]                = { .type = NLA_U32 },
        [NL80211_ATTR_FREQ_RANGE_START]                = { .type = NLA_U32 },
        [NL80211_ATTR_FREQ_RANGE_END]                = { .type = NLA_U32 },
        [NL80211_ATTR_FREQ_RANGE_MAX_BW]        = { .type = NLA_U32 },
        [NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]        = { .type = NLA_U32 },
        [NL80211_ATTR_POWER_RULE_MAX_EIRP]        = { .type = NLA_U32 },
        [NL80211_ATTR_DFS_CAC_TIME]                = { .type = NLA_U32 },
};

static int parse_reg_rule(struct nlattr *tb[],
        struct ieee80211_reg_rule *reg_rule)
{
        struct ieee80211_freq_range *freq_range = &reg_rule->freq_range;
        struct ieee80211_power_rule *power_rule = &reg_rule->power_rule;

        if (!tb[NL80211_ATTR_REG_RULE_FLAGS])
                return -EINVAL;
        if (!tb[NL80211_ATTR_FREQ_RANGE_START])
                return -EINVAL;
        if (!tb[NL80211_ATTR_FREQ_RANGE_END])
                return -EINVAL;
        if (!tb[NL80211_ATTR_FREQ_RANGE_MAX_BW])
                return -EINVAL;
        if (!tb[NL80211_ATTR_POWER_RULE_MAX_EIRP])
                return -EINVAL;

        reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);

        freq_range->start_freq_khz =
                nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
        freq_range->end_freq_khz =
                nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_END]);
        freq_range->max_bandwidth_khz =
                nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_MAX_BW]);

        power_rule->max_eirp =
                nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_EIRP]);

        if (tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN])
                power_rule->max_antenna_gain =
                        nla_get_u32(tb[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN]);

        if (tb[NL80211_ATTR_DFS_CAC_TIME])
                reg_rule->dfs_cac_ms =
                        nla_get_u32(tb[NL80211_ATTR_DFS_CAC_TIME]);

        return 0;
}

static int nl80211_set_reg(struct sk_buff *skb, struct genl_info *info)
{
        struct nlattr *tb[NL80211_REG_RULE_ATTR_MAX + 1];
        struct nlattr *nl_reg_rule;
        char *alpha2;
        int rem_reg_rules, r;
        u32 num_rules = 0, rule_idx = 0;
        enum nl80211_dfs_regions dfs_region = NL80211_DFS_UNSET;
        struct ieee80211_regdomain *rd;

        if (!info->attrs[NL80211_ATTR_REG_ALPHA2])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_REG_RULES])
                return -EINVAL;

        alpha2 = nla_data(info->attrs[NL80211_ATTR_REG_ALPHA2]);

        if (info->attrs[NL80211_ATTR_DFS_REGION])
                dfs_region = nla_get_u8(info->attrs[NL80211_ATTR_DFS_REGION]);

        nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
                            rem_reg_rules) {
                num_rules++;
                if (num_rules > NL80211_MAX_SUPP_REG_RULES)
                        return -EINVAL;
        }

        rtnl_lock();
        if (!reg_is_valid_request(alpha2)) {
                r = -EINVAL;
                goto out;
        }

        rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
        if (!rd) {
                r = -ENOMEM;
                goto out;
        }

        rd->n_reg_rules = num_rules;
        rd->alpha2[0] = alpha2[0];
        rd->alpha2[1] = alpha2[1];

        /*
         * Disable DFS master mode if the DFS region was
         * not supported or known on this kernel.
         */
        if (reg_supported_dfs_region(dfs_region))
                rd->dfs_region = dfs_region;

        nla_for_each_nested(nl_reg_rule, info->attrs[NL80211_ATTR_REG_RULES],
                            rem_reg_rules) {
                r = nla_parse_nested_deprecated(tb, NL80211_REG_RULE_ATTR_MAX,
                                                nl_reg_rule, reg_rule_policy,
                                                info->extack);
                if (r)
                        goto bad_reg;
                r = parse_reg_rule(tb, &rd->reg_rules[rule_idx]);
                if (r)
                        goto bad_reg;

                rule_idx++;

                if (rule_idx > NL80211_MAX_SUPP_REG_RULES) {
                        r = -EINVAL;
                        goto bad_reg;
                }
        }

        r = set_regdom(rd, REGD_SOURCE_CRDA);
        /* set_regdom takes ownership of rd */
        rd = NULL;
 bad_reg:
        kfree(rd);
 out:
        rtnl_unlock();
        return r;
}
#endif /* CONFIG_CFG80211_CRDA_SUPPORT */

static int validate_scan_freqs(struct nlattr *freqs)
{
        struct nlattr *attr1, *attr2;
        int n_channels = 0, tmp1, tmp2;

        nla_for_each_nested(attr1, freqs, tmp1)
                if (nla_len(attr1) != sizeof(u32))
                        return 0;

        nla_for_each_nested(attr1, freqs, tmp1) {
                n_channels++;
                /*
                 * Some hardware has a limited channel list for
                 * scanning, and it is pretty much nonsensical
                 * to scan for a channel twice, so disallow that
                 * and don't require drivers to check that the
                 * channel list they get isn't longer than what
                 * they can scan, as long as they can scan all
                 * the channels they registered at once.
                 */
                nla_for_each_nested(attr2, freqs, tmp2)
                        if (attr1 != attr2 &&
                            nla_get_u32(attr1) == nla_get_u32(attr2))
                                return 0;
        }

        return n_channels;
}

static bool is_band_valid(struct wiphy *wiphy, enum nl80211_band b)
{
        return b < NUM_NL80211_BANDS && wiphy->bands[b];
}

static int parse_bss_select(struct nlattr *nla, struct wiphy *wiphy,
                            struct cfg80211_bss_selection *bss_select)
{
        struct nlattr *attr[NL80211_BSS_SELECT_ATTR_MAX + 1];
        struct nlattr *nest;
        int err;
        bool found = false;
        int i;

        /* only process one nested attribute */
        nest = nla_data(nla);
        if (!nla_ok(nest, nla_len(nest)))
                return -EINVAL;

        err = nla_parse_nested_deprecated(attr, NL80211_BSS_SELECT_ATTR_MAX,
                                          nest, nl80211_bss_select_policy,
                                          NULL);
        if (err)
                return err;

        /* only one attribute may be given */
        for (i = 0; i <= NL80211_BSS_SELECT_ATTR_MAX; i++) {
                if (attr[i]) {
                        if (found)
                                return -EINVAL;
                        found = true;
                }
        }

        bss_select->behaviour = __NL80211_BSS_SELECT_ATTR_INVALID;

        if (attr[NL80211_BSS_SELECT_ATTR_RSSI])
                bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI;

        if (attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]) {
                bss_select->behaviour = NL80211_BSS_SELECT_ATTR_BAND_PREF;
                bss_select->param.band_pref =
                        nla_get_u32(attr[NL80211_BSS_SELECT_ATTR_BAND_PREF]);
                if (!is_band_valid(wiphy, bss_select->param.band_pref))
                        return -EINVAL;
        }

        if (attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]) {
                struct nl80211_bss_select_rssi_adjust *adj_param;

                adj_param = nla_data(attr[NL80211_BSS_SELECT_ATTR_RSSI_ADJUST]);
                bss_select->behaviour = NL80211_BSS_SELECT_ATTR_RSSI_ADJUST;
                bss_select->param.adjust.band = adj_param->band;
                bss_select->param.adjust.delta = adj_param->delta;
                if (!is_band_valid(wiphy, bss_select->param.adjust.band))
                        return -EINVAL;
        }

        /* user-space did not provide behaviour attribute */
        if (bss_select->behaviour == __NL80211_BSS_SELECT_ATTR_INVALID)
                return -EINVAL;

        if (!(wiphy->bss_select_support & BIT(bss_select->behaviour)))
                return -EINVAL;

        return 0;
}

int nl80211_parse_random_mac(struct nlattr **attrs,
                             u8 *mac_addr, u8 *mac_addr_mask)
{
        int i;

        if (!attrs[NL80211_ATTR_MAC] && !attrs[NL80211_ATTR_MAC_MASK]) {
                eth_zero_addr(mac_addr);
                eth_zero_addr(mac_addr_mask);
                mac_addr[0] = 0x2;
                mac_addr_mask[0] = 0x3;

                return 0;
        }

        /* need both or none */
        if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_MAC_MASK])
                return -EINVAL;

        memcpy(mac_addr, nla_data(attrs[NL80211_ATTR_MAC]), ETH_ALEN);
        memcpy(mac_addr_mask, nla_data(attrs[NL80211_ATTR_MAC_MASK]), ETH_ALEN);

        /* don't allow or configure an mcast address */
        if (!is_multicast_ether_addr(mac_addr_mask) ||
            is_multicast_ether_addr(mac_addr))
                return -EINVAL;

        /*
         * allow users to pass a MAC address that has bits set outside
         * of the mask, but don't bother drivers with having to deal
         * with such bits
         */
        for (i = 0; i < ETH_ALEN; i++)
                mac_addr[i] &= mac_addr_mask[i];

        return 0;
}

static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev,
                                              struct ieee80211_channel *chan)
{
        unsigned int link_id;
        bool all_ok = true;

        lockdep_assert_wiphy(wdev->wiphy);

        if (!cfg80211_beaconing_iface_active(wdev))
                return true;

        /*
         * FIXME: check if we have a free HW resource/link for chan
         *
         * This, as well as the FIXME below, requires knowing the link
         * capabilities of the hardware.
         */

        /* we cannot leave radar channels */
        for_each_valid_link(wdev, link_id) {
                struct cfg80211_chan_def *chandef;

                chandef = wdev_chandef(wdev, link_id);
                if (!chandef || !chandef->chan)
                        continue;

                /*
                 * FIXME: don't require all_ok, but rather check only the
                 *          correct HW resource/link onto which 'chan' falls,
                 *          as only that link leaves the channel for doing
                 *          the off-channel operation.
                 */

                if (chandef->chan->flags & IEEE80211_CHAN_RADAR)
                        all_ok = false;
        }

        if (all_ok)
                return true;

        return regulatory_pre_cac_allowed(wdev->wiphy);
}

static bool nl80211_check_scan_feat(struct wiphy *wiphy, u32 flags, u32 flag,
                                    enum nl80211_ext_feature_index feat)
{
        if (!(flags & flag))
                return true;
        if (wiphy_ext_feature_isset(wiphy, feat))
                return true;
        return false;
}

static int
nl80211_check_scan_flags(struct wiphy *wiphy, struct wireless_dev *wdev,
                         void *request, struct nlattr **attrs,
                         bool is_sched_scan)
{
        u8 *mac_addr, *mac_addr_mask;
        u32 *flags;
        enum nl80211_feature_flags randomness_flag;

        if (!attrs[NL80211_ATTR_SCAN_FLAGS])
                return 0;

        if (is_sched_scan) {
                struct cfg80211_sched_scan_request *req = request;

                randomness_flag = wdev ?
                                  NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR :
                                  NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
                flags = &req->flags;
                mac_addr = req->mac_addr;
                mac_addr_mask = req->mac_addr_mask;
        } else {
                struct cfg80211_scan_request *req = request;

                randomness_flag = NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
                flags = &req->flags;
                mac_addr = req->mac_addr;
                mac_addr_mask = req->mac_addr_mask;
        }

        *flags = nla_get_u32(attrs[NL80211_ATTR_SCAN_FLAGS]);

        if (((*flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
             !(wiphy->features & NL80211_FEATURE_LOW_PRIORITY_SCAN)) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_LOW_SPAN,
                                     NL80211_EXT_FEATURE_LOW_SPAN_SCAN) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_LOW_POWER,
                                     NL80211_EXT_FEATURE_LOW_POWER_SCAN) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_HIGH_ACCURACY,
                                     NL80211_EXT_FEATURE_HIGH_ACCURACY_SCAN) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME,
                                     NL80211_EXT_FEATURE_FILS_MAX_CHANNEL_TIME) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP,
                                     NL80211_EXT_FEATURE_ACCEPT_BCAST_PROBE_RESP) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION,
                                     NL80211_EXT_FEATURE_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE,
                                     NL80211_EXT_FEATURE_OCE_PROBE_REQ_HIGH_TX_RATE) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_RANDOM_SN,
                                     NL80211_EXT_FEATURE_SCAN_RANDOM_SN) ||
            !nl80211_check_scan_feat(wiphy, *flags,
                                     NL80211_SCAN_FLAG_MIN_PREQ_CONTENT,
                                     NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT))
                return -EOPNOTSUPP;

        if (*flags & NL80211_SCAN_FLAG_RANDOM_ADDR) {
                int err;

                if (!(wiphy->features & randomness_flag) ||
                    (wdev && wdev->connected))
                        return -EOPNOTSUPP;

                err = nl80211_parse_random_mac(attrs, mac_addr, mac_addr_mask);
                if (err)
                        return err;
        }

        return 0;
}

static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        struct cfg80211_scan_request *request;
        struct nlattr *scan_freqs = NULL;
        bool scan_freqs_khz = false;
        struct nlattr *attr;
        struct wiphy *wiphy;
        int err, tmp, n_ssids = 0, n_channels, i;
        size_t ie_len, size;
        size_t ssids_offset, ie_offset;

        wiphy = &rdev->wiphy;

        if (wdev->iftype == NL80211_IFTYPE_NAN)
                return -EOPNOTSUPP;

        if (!rdev->ops->scan)
                return -EOPNOTSUPP;

        if (rdev->scan_req || rdev->scan_msg)
                return -EBUSY;

        if (info->attrs[NL80211_ATTR_SCAN_FREQ_KHZ]) {
                if (!wiphy_ext_feature_isset(wiphy,
                                             NL80211_EXT_FEATURE_SCAN_FREQ_KHZ))
                        return -EOPNOTSUPP;
                scan_freqs = info->attrs[NL80211_ATTR_SCAN_FREQ_KHZ];
                scan_freqs_khz = true;
        } else if (info->attrs[NL80211_ATTR_SCAN_FREQUENCIES])
                scan_freqs = info->attrs[NL80211_ATTR_SCAN_FREQUENCIES];

        if (scan_freqs) {
                n_channels = validate_scan_freqs(scan_freqs);
                if (!n_channels)
                        return -EINVAL;
        } else {
                n_channels = ieee80211_get_num_supported_channels(wiphy);
        }

        if (info->attrs[NL80211_ATTR_SCAN_SSIDS])
                nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp)
                        n_ssids++;

        if (n_ssids > wiphy->max_scan_ssids)
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_IE])
                ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        else
                ie_len = 0;

        if (ie_len > wiphy->max_scan_ie_len)
                return -EINVAL;

        size = struct_size(request, channels, n_channels);
        ssids_offset = size;
        size = size_add(size, array_size(sizeof(*request->ssids), n_ssids));
        ie_offset = size;
        size = size_add(size, ie_len);
        request = kzalloc(size, GFP_KERNEL);
        if (!request)
                return -ENOMEM;
        request->n_channels = n_channels;

        if (n_ssids)
                request->ssids = (void *)request + ssids_offset;
        request->n_ssids = n_ssids;
        if (ie_len)
                request->ie = (void *)request + ie_offset;

        i = 0;
        if (scan_freqs) {
                /* user specified, bail out if channel not found */
                nla_for_each_nested(attr, scan_freqs, tmp) {
                        struct ieee80211_channel *chan;
                        int freq = nla_get_u32(attr);

                        if (!scan_freqs_khz)
                                freq = MHZ_TO_KHZ(freq);

                        chan = ieee80211_get_channel_khz(wiphy, freq);
                        if (!chan) {
                                err = -EINVAL;
                                goto out_free;
                        }

                        /* ignore disabled channels */
                        if (chan->flags & IEEE80211_CHAN_DISABLED)
                                continue;

                        request->channels[i] = chan;
                        i++;
                }
        } else {
                enum nl80211_band band;

                /* all channels */
                for (band = 0; band < NUM_NL80211_BANDS; band++) {
                        int j;

                        if (!wiphy->bands[band])
                                continue;
                        for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
                                struct ieee80211_channel *chan;

                                chan = &wiphy->bands[band]->channels[j];

                                if (chan->flags & IEEE80211_CHAN_DISABLED)
                                        continue;

                                request->channels[i] = chan;
                                i++;
                        }
                }
        }

        if (!i) {
                err = -EINVAL;
                goto out_free;
        }

        request->n_channels = i;

        for (i = 0; i < request->n_channels; i++) {
                struct ieee80211_channel *chan = request->channels[i];

                /* if we can go off-channel to the target channel we're good */
                if (cfg80211_off_channel_oper_allowed(wdev, chan))
                        continue;

                if (!cfg80211_wdev_on_sub_chan(wdev, chan, true)) {
                        err = -EBUSY;
                        goto out_free;
                }
        }

        i = 0;
        if (n_ssids) {
                nla_for_each_nested(attr, info->attrs[NL80211_ATTR_SCAN_SSIDS], tmp) {
                        if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
                                err = -EINVAL;
                                goto out_free;
                        }
                        request->ssids[i].ssid_len = nla_len(attr);
                        memcpy(request->ssids[i].ssid, nla_data(attr), nla_len(attr));
                        i++;
                }
        }

        if (info->attrs[NL80211_ATTR_IE]) {
                request->ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
                memcpy((void *)request->ie,
                       nla_data(info->attrs[NL80211_ATTR_IE]),
                       request->ie_len);
        }

        for (i = 0; i < NUM_NL80211_BANDS; i++)
                if (wiphy->bands[i])
                        request->rates[i] =
                                (1 << wiphy->bands[i]->n_bitrates) - 1;

        if (info->attrs[NL80211_ATTR_SCAN_SUPP_RATES]) {
                nla_for_each_nested(attr,
                                    info->attrs[NL80211_ATTR_SCAN_SUPP_RATES],
                                    tmp) {
                        enum nl80211_band band = nla_type(attr);

                        if (band < 0 || band >= NUM_NL80211_BANDS) {
                                err = -EINVAL;
                                goto out_free;
                        }

                        if (!wiphy->bands[band])
                                continue;

                        err = ieee80211_get_ratemask(wiphy->bands[band],
                                                     nla_data(attr),
                                                     nla_len(attr),
                                                     &request->rates[band]);
                        if (err)
                                goto out_free;
                }
        }

        if (info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]) {
                request->duration =
                        nla_get_u16(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION]);
                request->duration_mandatory =
                        nla_get_flag(info->attrs[NL80211_ATTR_MEASUREMENT_DURATION_MANDATORY]);
        }

        err = nl80211_check_scan_flags(wiphy, wdev, request, info->attrs,
                                       false);
        if (err)
                goto out_free;

        request->no_cck =
                nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);

        /* Initial implementation used NL80211_ATTR_MAC to set the specific
         * BSSID to scan for. This was problematic because that same attribute
         * was already used for another purpose (local random MAC address). The
         * NL80211_ATTR_BSSID attribute was added to fix this. For backwards
         * compatibility with older userspace components, also use the
         * NL80211_ATTR_MAC value here if it can be determined to be used for
         * the specific BSSID use case instead of the random MAC address
         * (NL80211_ATTR_SCAN_FLAGS is used to enable random MAC address use).
         */
        if (info->attrs[NL80211_ATTR_BSSID])
                memcpy(request->bssid,
                       nla_data(info->attrs[NL80211_ATTR_BSSID]), ETH_ALEN);
        else if (!(request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR) &&
                 info->attrs[NL80211_ATTR_MAC])
                memcpy(request->bssid, nla_data(info->attrs[NL80211_ATTR_MAC]),
                       ETH_ALEN);
        else
                eth_broadcast_addr(request->bssid);

        request->tsf_report_link_id = nl80211_link_id_or_invalid(info->attrs);
        request->wdev = wdev;
        request->wiphy = &rdev->wiphy;
        request->scan_start = jiffies;

        rdev->scan_req = request;
        err = cfg80211_scan(rdev);

        if (err)
                goto out_free;

        nl80211_send_scan_start(rdev, wdev);
        dev_hold(wdev->netdev);

        return 0;

 out_free:
        rdev->scan_req = NULL;
        kfree(request);

        return err;
}

static int nl80211_abort_scan(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];

        if (!rdev->ops->abort_scan)
                return -EOPNOTSUPP;

        if (rdev->scan_msg)
                return 0;

        if (!rdev->scan_req)
                return -ENOENT;

        rdev_abort_scan(rdev, wdev);
        return 0;
}

static int
nl80211_parse_sched_scan_plans(struct wiphy *wiphy, int n_plans,
                               struct cfg80211_sched_scan_request *request,
                               struct nlattr **attrs)
{
        int tmp, err, i = 0;
        struct nlattr *attr;

        if (!attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
                u32 interval;

                /*
                 * If scan plans are not specified,
                 * %NL80211_ATTR_SCHED_SCAN_INTERVAL will be specified. In this
                 * case one scan plan will be set with the specified scan
                 * interval and infinite number of iterations.
                 */
                interval = nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL]);
                if (!interval)
                        return -EINVAL;

                request->scan_plans[0].interval =
                        DIV_ROUND_UP(interval, MSEC_PER_SEC);
                if (!request->scan_plans[0].interval)
                        return -EINVAL;

                if (request->scan_plans[0].interval >
                    wiphy->max_sched_scan_plan_interval)
                        request->scan_plans[0].interval =
                                wiphy->max_sched_scan_plan_interval;

                return 0;
        }

        nla_for_each_nested(attr, attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp) {
                struct nlattr *plan[NL80211_SCHED_SCAN_PLAN_MAX + 1];

                if (WARN_ON(i >= n_plans))
                        return -EINVAL;

                err = nla_parse_nested_deprecated(plan,
                                                  NL80211_SCHED_SCAN_PLAN_MAX,
                                                  attr, nl80211_plan_policy,
                                                  NULL);
                if (err)
                        return err;

                if (!plan[NL80211_SCHED_SCAN_PLAN_INTERVAL])
                        return -EINVAL;

                request->scan_plans[i].interval =
                        nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_INTERVAL]);
                if (!request->scan_plans[i].interval ||
                    request->scan_plans[i].interval >
                    wiphy->max_sched_scan_plan_interval)
                        return -EINVAL;

                if (plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]) {
                        request->scan_plans[i].iterations =
                                nla_get_u32(plan[NL80211_SCHED_SCAN_PLAN_ITERATIONS]);
                        if (!request->scan_plans[i].iterations ||
                            (request->scan_plans[i].iterations >
                             wiphy->max_sched_scan_plan_iterations))
                                return -EINVAL;
                } else if (i < n_plans - 1) {
                        /*
                         * All scan plans but the last one must specify
                         * a finite number of iterations
                         */
                        return -EINVAL;
                }

                i++;
        }

        /*
         * The last scan plan must not specify the number of
         * iterations, it is supposed to run infinitely
         */
        if (request->scan_plans[n_plans - 1].iterations)
                return  -EINVAL;

        return 0;
}

static struct cfg80211_sched_scan_request *
nl80211_parse_sched_scan(struct wiphy *wiphy, struct wireless_dev *wdev,
                         struct nlattr **attrs, int max_match_sets)
{
        struct cfg80211_sched_scan_request *request;
        struct nlattr *attr;
        int err, tmp, n_ssids = 0, n_match_sets = 0, n_channels, i, n_plans = 0;
        enum nl80211_band band;
        size_t ie_len, size;
        struct nlattr *tb[NL80211_SCHED_SCAN_MATCH_ATTR_MAX + 1];
        s32 default_match_rssi = NL80211_SCAN_RSSI_THOLD_OFF;

        if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
                n_channels = validate_scan_freqs(
                                attrs[NL80211_ATTR_SCAN_FREQUENCIES]);
                if (!n_channels)
                        return ERR_PTR(-EINVAL);
        } else {
                n_channels = ieee80211_get_num_supported_channels(wiphy);
        }

        if (attrs[NL80211_ATTR_SCAN_SSIDS])
                nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
                                    tmp)
                        n_ssids++;

        if (n_ssids > wiphy->max_sched_scan_ssids)
                return ERR_PTR(-EINVAL);

        /*
         * First, count the number of 'real' matchsets. Due to an issue with
         * the old implementation, matchsets containing only the RSSI attribute
         * (NL80211_SCHED_SCAN_MATCH_ATTR_RSSI) are considered as the 'default'
         * RSSI for all matchsets, rather than their own matchset for reporting
         * all APs with a strong RSSI. This is needed to be compatible with
         * older userspace that treated a matchset with only the RSSI as the
         * global RSSI for all other matchsets - if there are other matchsets.
         */
        if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
                nla_for_each_nested(attr,
                                    attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
                                    tmp) {
                        struct nlattr *rssi;

                        err = nla_parse_nested_deprecated(tb,
                                                          NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
                                                          attr,
                                                          nl80211_match_policy,
                                                          NULL);
                        if (err)
                                return ERR_PTR(err);

                        /* SSID and BSSID are mutually exclusive */
                        if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] &&
                            tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID])
                                return ERR_PTR(-EINVAL);

                        /* add other standalone attributes here */
                        if (tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID] ||
                            tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID]) {
                                n_match_sets++;
                                continue;
                        }
                        rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
                        if (rssi)
                                default_match_rssi = nla_get_s32(rssi);
                }
        }

        /* However, if there's no other matchset, add the RSSI one */
        if (!n_match_sets && default_match_rssi != NL80211_SCAN_RSSI_THOLD_OFF)
                n_match_sets = 1;

        if (n_match_sets > max_match_sets)
                return ERR_PTR(-EINVAL);

        if (attrs[NL80211_ATTR_IE])
                ie_len = nla_len(attrs[NL80211_ATTR_IE]);
        else
                ie_len = 0;

        if (ie_len > wiphy->max_sched_scan_ie_len)
                return ERR_PTR(-EINVAL);

        if (attrs[NL80211_ATTR_SCHED_SCAN_PLANS]) {
                /*
                 * NL80211_ATTR_SCHED_SCAN_INTERVAL must not be specified since
                 * each scan plan already specifies its own interval
                 */
                if (attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
                        return ERR_PTR(-EINVAL);

                nla_for_each_nested(attr,
                                    attrs[NL80211_ATTR_SCHED_SCAN_PLANS], tmp)
                        n_plans++;
        } else {
                /*
                 * The scan interval attribute is kept for backward
                 * compatibility. If no scan plans are specified and sched scan
                 * interval is specified, one scan plan will be set with this
                 * scan interval and infinite number of iterations.
                 */
                if (!attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
                        return ERR_PTR(-EINVAL);

                n_plans = 1;
        }

        if (!n_plans || n_plans > wiphy->max_sched_scan_plans)
                return ERR_PTR(-EINVAL);

        if (!wiphy_ext_feature_isset(
                    wiphy, NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI) &&
            (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI] ||
             attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]))
                return ERR_PTR(-EINVAL);

        size = struct_size(request, channels, n_channels);
        size = size_add(size, array_size(sizeof(*request->ssids), n_ssids));
        size = size_add(size, array_size(sizeof(*request->match_sets),
                                         n_match_sets));
        size = size_add(size, array_size(sizeof(*request->scan_plans),
                                         n_plans));
        size = size_add(size, ie_len);
        request = kzalloc(size, GFP_KERNEL);
        if (!request)
                return ERR_PTR(-ENOMEM);

        if (n_ssids)
                request->ssids = (void *)&request->channels[n_channels];
        request->n_ssids = n_ssids;
        if (ie_len) {
                if (n_ssids)
                        request->ie = (void *)(request->ssids + n_ssids);
                else
                        request->ie = (void *)(request->channels + n_channels);
        }

        if (n_match_sets) {
                if (request->ie)
                        request->match_sets = (void *)(request->ie + ie_len);
                else if (n_ssids)
                        request->match_sets =
                                (void *)(request->ssids + n_ssids);
                else
                        request->match_sets =
                                (void *)(request->channels + n_channels);
        }
        request->n_match_sets = n_match_sets;

        if (n_match_sets)
                request->scan_plans = (void *)(request->match_sets +
                                               n_match_sets);
        else if (request->ie)
                request->scan_plans = (void *)(request->ie + ie_len);
        else if (n_ssids)
                request->scan_plans = (void *)(request->ssids + n_ssids);
        else
                request->scan_plans = (void *)(request->channels + n_channels);

        request->n_scan_plans = n_plans;

        i = 0;
        if (attrs[NL80211_ATTR_SCAN_FREQUENCIES]) {
                /* user specified, bail out if channel not found */
                nla_for_each_nested(attr,
                                    attrs[NL80211_ATTR_SCAN_FREQUENCIES],
                                    tmp) {
                        struct ieee80211_channel *chan;

                        chan = ieee80211_get_channel(wiphy, nla_get_u32(attr));

                        if (!chan) {
                                err = -EINVAL;
                                goto out_free;
                        }

                        /* ignore disabled channels */
                        if (chan->flags & IEEE80211_CHAN_DISABLED)
                                continue;

                        request->channels[i] = chan;
                        i++;
                }
        } else {
                /* all channels */
                for (band = 0; band < NUM_NL80211_BANDS; band++) {
                        int j;

                        if (!wiphy->bands[band])
                                continue;
                        for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
                                struct ieee80211_channel *chan;

                                chan = &wiphy->bands[band]->channels[j];

                                if (chan->flags & IEEE80211_CHAN_DISABLED)
                                        continue;

                                request->channels[i] = chan;
                                i++;
                        }
                }
        }

        if (!i) {
                err = -EINVAL;
                goto out_free;
        }

        request->n_channels = i;

        i = 0;
        if (n_ssids) {
                nla_for_each_nested(attr, attrs[NL80211_ATTR_SCAN_SSIDS],
                                    tmp) {
                        if (nla_len(attr) > IEEE80211_MAX_SSID_LEN) {
                                err = -EINVAL;
                                goto out_free;
                        }
                        request->ssids[i].ssid_len = nla_len(attr);
                        memcpy(request->ssids[i].ssid, nla_data(attr),
                               nla_len(attr));
                        i++;
                }
        }

        i = 0;
        if (attrs[NL80211_ATTR_SCHED_SCAN_MATCH]) {
                nla_for_each_nested(attr,
                                    attrs[NL80211_ATTR_SCHED_SCAN_MATCH],
                                    tmp) {
                        struct nlattr *ssid, *bssid, *rssi;

                        err = nla_parse_nested_deprecated(tb,
                                                          NL80211_SCHED_SCAN_MATCH_ATTR_MAX,
                                                          attr,
                                                          nl80211_match_policy,
                                                          NULL);
                        if (err)
                                goto out_free;
                        ssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_SSID];
                        bssid = tb[NL80211_SCHED_SCAN_MATCH_ATTR_BSSID];

                        if (!ssid && !bssid) {
                                i++;
                                continue;
                        }

                        if (WARN_ON(i >= n_match_sets)) {
                                /* this indicates a programming error,
                                 * the loop above should have verified
                                 * things properly
                                 */
                                err = -EINVAL;
                                goto out_free;
                        }

                        if (ssid) {
                                memcpy(request->match_sets[i].ssid.ssid,
                                       nla_data(ssid), nla_len(ssid));
                                request->match_sets[i].ssid.ssid_len =
                                        nla_len(ssid);
                        }
                        if (bssid)
                                memcpy(request->match_sets[i].bssid,
                                       nla_data(bssid), ETH_ALEN);

                        /* special attribute - old implementation w/a */
                        request->match_sets[i].rssi_thold = default_match_rssi;
                        rssi = tb[NL80211_SCHED_SCAN_MATCH_ATTR_RSSI];
                        if (rssi)
                                request->match_sets[i].rssi_thold =
                                        nla_get_s32(rssi);
                        i++;
                }

                /* there was no other matchset, so the RSSI one is alone */
                if (i == 0 && n_match_sets)
                        request->match_sets[0].rssi_thold = default_match_rssi;

                request->min_rssi_thold = INT_MAX;
                for (i = 0; i < n_match_sets; i++)
                        request->min_rssi_thold =
                                min(request->match_sets[i].rssi_thold,
                                    request->min_rssi_thold);
        } else {
                request->min_rssi_thold = NL80211_SCAN_RSSI_THOLD_OFF;
        }

        if (ie_len) {
                request->ie_len = ie_len;
                memcpy((void *)request->ie,
                       nla_data(attrs[NL80211_ATTR_IE]),
                       request->ie_len);
        }

        err = nl80211_check_scan_flags(wiphy, wdev, request, attrs, true);
        if (err)
                goto out_free;

        if (attrs[NL80211_ATTR_SCHED_SCAN_DELAY])
                request->delay =
                        nla_get_u32(attrs[NL80211_ATTR_SCHED_SCAN_DELAY]);

        if (attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]) {
                request->relative_rssi = nla_get_s8(
                        attrs[NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI]);
                request->relative_rssi_set = true;
        }

        if (request->relative_rssi_set &&
            attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]) {
                struct nl80211_bss_select_rssi_adjust *rssi_adjust;

                rssi_adjust = nla_data(
                        attrs[NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST]);
                request->rssi_adjust.band = rssi_adjust->band;
                request->rssi_adjust.delta = rssi_adjust->delta;
                if (!is_band_valid(wiphy, request->rssi_adjust.band)) {
                        err = -EINVAL;
                        goto out_free;
                }
        }

        err = nl80211_parse_sched_scan_plans(wiphy, n_plans, request, attrs);
        if (err)
                goto out_free;

        request->scan_start = jiffies;

        return request;

out_free:
        kfree(request);
        return ERR_PTR(err);
}

static int nl80211_start_sched_scan(struct sk_buff *skb,
                                    struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_sched_scan_request *sched_scan_req;
        bool want_multi;
        int err;

        if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_start)
                return -EOPNOTSUPP;

        want_multi = info->attrs[NL80211_ATTR_SCHED_SCAN_MULTI];
        err = cfg80211_sched_scan_req_possible(rdev, want_multi);
        if (err)
                return err;

        sched_scan_req = nl80211_parse_sched_scan(&rdev->wiphy, wdev,
                                                  info->attrs,
                                                  rdev->wiphy.max_match_sets);

        err = PTR_ERR_OR_ZERO(sched_scan_req);
        if (err)
                goto out_err;

        /* leave request id zero for legacy request
         * or if driver does not support multi-scheduled scan
         */
        if (want_multi && rdev->wiphy.max_sched_scan_reqs > 1)
                sched_scan_req->reqid = cfg80211_assign_cookie(rdev);

        err = rdev_sched_scan_start(rdev, dev, sched_scan_req);
        if (err)
                goto out_free;

        sched_scan_req->dev = dev;
        sched_scan_req->wiphy = &rdev->wiphy;

        if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
                sched_scan_req->owner_nlportid = info->snd_portid;

        cfg80211_add_sched_scan_req(rdev, sched_scan_req);

        nl80211_send_sched_scan(sched_scan_req, NL80211_CMD_START_SCHED_SCAN);
        return 0;

out_free:
        kfree(sched_scan_req);
out_err:
        return err;
}

static int nl80211_stop_sched_scan(struct sk_buff *skb,
                                   struct genl_info *info)
{
        struct cfg80211_sched_scan_request *req;
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        u64 cookie;

        if (!rdev->wiphy.max_sched_scan_reqs || !rdev->ops->sched_scan_stop)
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_COOKIE]) {
                cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
                return __cfg80211_stop_sched_scan(rdev, cookie, false);
        }

        req = list_first_or_null_rcu(&rdev->sched_scan_req_list,
                                     struct cfg80211_sched_scan_request,
                                     list);
        if (!req || req->reqid ||
            (req->owner_nlportid &&
             req->owner_nlportid != info->snd_portid))
                return -ENOENT;

        return cfg80211_stop_sched_scan_req(rdev, req, false);
}

static int nl80211_start_radar_detection(struct sk_buff *skb,
                                         struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_chan_def chandef;
        enum nl80211_dfs_regions dfs_region;
        unsigned int cac_time_ms;
        int err = -EINVAL;

        flush_delayed_work(&rdev->dfs_update_channels_wk);

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
        case NL80211_IFTYPE_MESH_POINT:
        case NL80211_IFTYPE_ADHOC:
                break;
        default:
                /* caution - see cfg80211_beaconing_iface_active() below */
                return -EINVAL;
        }

        wiphy_lock(wiphy);

        dfs_region = reg_get_dfs_region(wiphy);
        if (dfs_region == NL80211_DFS_UNSET)
                goto unlock;

        err = nl80211_parse_chandef(rdev, info, &chandef);
        if (err)
                goto unlock;

        err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
        if (err < 0)
                goto unlock;

        if (err == 0) {
                err = -EINVAL;
                goto unlock;
        }

        if (!cfg80211_chandef_dfs_usable(wiphy, &chandef)) {
                err = -EINVAL;
                goto unlock;
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_RADAR_BACKGROUND])) {
                err = cfg80211_start_background_radar_detection(rdev, wdev,
                                                                &chandef);
                goto unlock;
        }

        if (cfg80211_beaconing_iface_active(wdev) || wdev->cac_started) {
                err = -EBUSY;
                goto unlock;
        }

        /* CAC start is offloaded to HW and can't be started manually */
        if (wiphy_ext_feature_isset(wiphy, NL80211_EXT_FEATURE_DFS_OFFLOAD)) {
                err = -EOPNOTSUPP;
                goto unlock;
        }

        if (!rdev->ops->start_radar_detection) {
                err = -EOPNOTSUPP;
                goto unlock;
        }

        cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, &chandef);
        if (WARN_ON(!cac_time_ms))
                cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;

        err = rdev_start_radar_detection(rdev, dev, &chandef, cac_time_ms);
        if (!err) {
                wdev->links[0].ap.chandef = chandef;
                wdev->cac_started = true;
                wdev->cac_start_time = jiffies;
                wdev->cac_time_ms = cac_time_ms;
        }
unlock:
        wiphy_unlock(wiphy);

        return err;
}

static int nl80211_notify_radar_detection(struct sk_buff *skb,
                                          struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_chan_def chandef;
        enum nl80211_dfs_regions dfs_region;
        int err;

        dfs_region = reg_get_dfs_region(wiphy);
        if (dfs_region == NL80211_DFS_UNSET) {
                GENL_SET_ERR_MSG(info,
                                 "DFS Region is not set. Unexpected Radar indication");
                return -EINVAL;
        }

        err = nl80211_parse_chandef(rdev, info, &chandef);
        if (err) {
                GENL_SET_ERR_MSG(info, "Unable to extract chandef info");
                return err;
        }

        err = cfg80211_chandef_dfs_required(wiphy, &chandef, wdev->iftype);
        if (err < 0) {
                GENL_SET_ERR_MSG(info, "chandef is invalid");
                return err;
        }

        if (err == 0) {
                GENL_SET_ERR_MSG(info,
                                 "Unexpected Radar indication for chandef/iftype");
                return -EINVAL;
        }

        /* Do not process this notification if radar is already detected
         * by kernel on this channel, and return success.
         */
        if (chandef.chan->dfs_state == NL80211_DFS_UNAVAILABLE)
                return 0;

        cfg80211_set_dfs_state(wiphy, &chandef, NL80211_DFS_UNAVAILABLE);

        cfg80211_sched_dfs_chan_update(rdev);

        rdev->radar_chandef = chandef;

        /* Propagate this notification to other radios as well */
        queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);

        return 0;
}

static int nl80211_parse_counter_offsets(struct cfg80211_registered_device *rdev,
                                         const u8 *data, size_t datalen,
                                         int first_count, struct nlattr *attr,
                                         const u16 **offsets, unsigned int *n_offsets)
{
        int i;

        *n_offsets = 0;

        if (!attr)
                return 0;

        if (!nla_len(attr) || (nla_len(attr) % sizeof(u16)))
                return -EINVAL;

        *n_offsets = nla_len(attr) / sizeof(u16);
        if (rdev->wiphy.max_num_csa_counters &&
            (*n_offsets > rdev->wiphy.max_num_csa_counters))
                return -EINVAL;

        *offsets = nla_data(attr);

        /* sanity checks - counters should fit and be the same */
        for (i = 0; i < *n_offsets; i++) {
                u16 offset = (*offsets)[i];

                if (offset >= datalen)
                        return -EINVAL;

                if (first_count != -1 && data[offset] != first_count)
                        return -EINVAL;
        }

        return 0;
}

static int nl80211_channel_switch(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_csa_settings params;
        struct nlattr **csa_attrs = NULL;
        int err;
        bool need_new_beacon = false;
        bool need_handle_dfs_flag = true;
        u32 cs_count;

        if (!rdev->ops->channel_switch ||
            !(rdev->wiphy.flags & WIPHY_FLAG_HAS_CHANNEL_SWITCH))
                return -EOPNOTSUPP;

        switch (dev->ieee80211_ptr->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
                need_new_beacon = true;
                /* For all modes except AP the handle_dfs flag needs to be
                 * supplied to tell the kernel that userspace will handle radar
                 * events when they happen. Otherwise a switch to a channel
                 * requiring DFS will be rejected.
                 */
                need_handle_dfs_flag = false;

                /* useless if AP is not running */
                if (!wdev->links[link_id].ap.beacon_interval)
                        return -ENOTCONN;
                break;
        case NL80211_IFTYPE_ADHOC:
                if (!wdev->u.ibss.ssid_len)
                        return -ENOTCONN;
                break;
        case NL80211_IFTYPE_MESH_POINT:
                if (!wdev->u.mesh.id_len)
                        return -ENOTCONN;
                break;
        default:
                return -EOPNOTSUPP;
        }

        memset(&params, 0, sizeof(params));
        params.beacon_csa.ftm_responder = -1;

        if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
            !info->attrs[NL80211_ATTR_CH_SWITCH_COUNT])
                return -EINVAL;

        /* only important for AP, IBSS and mesh create IEs internally */
        if (need_new_beacon && !info->attrs[NL80211_ATTR_CSA_IES])
                return -EINVAL;

        /* Even though the attribute is u32, the specification says
         * u8, so let's make sure we don't overflow.
         */
        cs_count = nla_get_u32(info->attrs[NL80211_ATTR_CH_SWITCH_COUNT]);
        if (cs_count > 255)
                return -EINVAL;

        params.count = cs_count;

        if (!need_new_beacon)
                goto skip_beacons;

        err = nl80211_parse_beacon(rdev, info->attrs, &params.beacon_after,
                                   info->extack);
        if (err)
                goto free;

        csa_attrs = kcalloc(NL80211_ATTR_MAX + 1, sizeof(*csa_attrs),
                            GFP_KERNEL);
        if (!csa_attrs) {
                err = -ENOMEM;
                goto free;
        }

        err = nla_parse_nested_deprecated(csa_attrs, NL80211_ATTR_MAX,
                                          info->attrs[NL80211_ATTR_CSA_IES],
                                          nl80211_policy, info->extack);
        if (err)
                goto free;

        err = nl80211_parse_beacon(rdev, csa_attrs, &params.beacon_csa,
                                   info->extack);
        if (err)
                goto free;

        if (!csa_attrs[NL80211_ATTR_CNTDWN_OFFS_BEACON]) {
                err = -EINVAL;
                goto free;
        }

        err = nl80211_parse_counter_offsets(rdev, params.beacon_csa.tail,
                                            params.beacon_csa.tail_len,
                                            params.count,
                                            csa_attrs[NL80211_ATTR_CNTDWN_OFFS_BEACON],
                                            &params.counter_offsets_beacon,
                                            &params.n_counter_offsets_beacon);
        if (err)
                goto free;

        err = nl80211_parse_counter_offsets(rdev, params.beacon_csa.probe_resp,
                                            params.beacon_csa.probe_resp_len,
                                            params.count,
                                            csa_attrs[NL80211_ATTR_CNTDWN_OFFS_PRESP],
                                            &params.counter_offsets_presp,
                                            &params.n_counter_offsets_presp);
        if (err)
                goto free;

skip_beacons:
        err = nl80211_parse_chandef(rdev, info, &params.chandef);
        if (err)
                goto free;

        if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &params.chandef,
                                           wdev->iftype)) {
                err = -EINVAL;
                goto free;
        }

        err = cfg80211_chandef_dfs_required(wdev->wiphy,
                                            &params.chandef,
                                            wdev->iftype);
        if (err < 0)
                goto free;

        if (err > 0) {
                params.radar_required = true;
                if (need_handle_dfs_flag &&
                    !nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS])) {
                        err = -EINVAL;
                        goto free;
                }
        }

        if (info->attrs[NL80211_ATTR_CH_SWITCH_BLOCK_TX])
                params.block_tx = true;

        params.link_id = link_id;
        err = rdev_channel_switch(rdev, dev, &params);

free:
        kfree(params.beacon_after.mbssid_ies);
        kfree(params.beacon_csa.mbssid_ies);
        kfree(params.beacon_after.rnr_ies);
        kfree(params.beacon_csa.rnr_ies);
        kfree(csa_attrs);
        return err;
}

static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
                            u32 seq, int flags,
                            struct cfg80211_registered_device *rdev,
                            struct wireless_dev *wdev,
                            struct cfg80211_internal_bss *intbss)
{
        struct cfg80211_bss *res = &intbss->pub;
        const struct cfg80211_bss_ies *ies;
        unsigned int link_id;
        void *hdr;
        struct nlattr *bss;

        lockdep_assert_wiphy(wdev->wiphy);

        hdr = nl80211hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
                             NL80211_CMD_NEW_SCAN_RESULTS);
        if (!hdr)
                return -1;

        genl_dump_check_consistent(cb, hdr);

        if (nla_put_u32(msg, NL80211_ATTR_GENERATION, rdev->bss_generation))
                goto nla_put_failure;
        if (wdev->netdev &&
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex))
                goto nla_put_failure;
        if (nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        bss = nla_nest_start_noflag(msg, NL80211_ATTR_BSS);
        if (!bss)
                goto nla_put_failure;
        if ((!is_zero_ether_addr(res->bssid) &&
             nla_put(msg, NL80211_BSS_BSSID, ETH_ALEN, res->bssid)))
                goto nla_put_failure;

        rcu_read_lock();
        /* indicate whether we have probe response data or not */
        if (rcu_access_pointer(res->proberesp_ies) &&
            nla_put_flag(msg, NL80211_BSS_PRESP_DATA))
                goto fail_unlock_rcu;

        /* this pointer prefers to be pointed to probe response data
         * but is always valid
         */
        ies = rcu_dereference(res->ies);
        if (ies) {
                if (nla_put_u64_64bit(msg, NL80211_BSS_TSF, ies->tsf,
                                      NL80211_BSS_PAD))
                        goto fail_unlock_rcu;
                if (ies->len && nla_put(msg, NL80211_BSS_INFORMATION_ELEMENTS,
                                        ies->len, ies->data))
                        goto fail_unlock_rcu;
        }

        /* and this pointer is always (unless driver didn't know) beacon data */
        ies = rcu_dereference(res->beacon_ies);
        if (ies && ies->from_beacon) {
                if (nla_put_u64_64bit(msg, NL80211_BSS_BEACON_TSF, ies->tsf,
                                      NL80211_BSS_PAD))
                        goto fail_unlock_rcu;
                if (ies->len && nla_put(msg, NL80211_BSS_BEACON_IES,
                                        ies->len, ies->data))
                        goto fail_unlock_rcu;
        }
        rcu_read_unlock();

        if (res->beacon_interval &&
            nla_put_u16(msg, NL80211_BSS_BEACON_INTERVAL, res->beacon_interval))
                goto nla_put_failure;
        if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||
            nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||
            nla_put_u32(msg, NL80211_BSS_FREQUENCY_OFFSET,
                        res->channel->freq_offset) ||
            nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,
                        jiffies_to_msecs(jiffies - intbss->ts)))
                goto nla_put_failure;

        if (intbss->parent_tsf &&
            (nla_put_u64_64bit(msg, NL80211_BSS_PARENT_TSF,
                               intbss->parent_tsf, NL80211_BSS_PAD) ||
             nla_put(msg, NL80211_BSS_PARENT_BSSID, ETH_ALEN,
                     intbss->parent_bssid)))
                goto nla_put_failure;

        if (intbss->ts_boottime &&
            nla_put_u64_64bit(msg, NL80211_BSS_LAST_SEEN_BOOTTIME,
                              intbss->ts_boottime, NL80211_BSS_PAD))
                goto nla_put_failure;

        if (!nl80211_put_signal(msg, intbss->pub.chains,
                                intbss->pub.chain_signal,
                                NL80211_BSS_CHAIN_SIGNAL))
                goto nla_put_failure;

        switch (rdev->wiphy.signal_type) {
        case CFG80211_SIGNAL_TYPE_MBM:
                if (nla_put_u32(msg, NL80211_BSS_SIGNAL_MBM, res->signal))
                        goto nla_put_failure;
                break;
        case CFG80211_SIGNAL_TYPE_UNSPEC:
                if (nla_put_u8(msg, NL80211_BSS_SIGNAL_UNSPEC, res->signal))
                        goto nla_put_failure;
                break;
        default:
                break;
        }

        switch (wdev->iftype) {
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_STATION:
                for_each_valid_link(wdev, link_id) {
                        if (intbss == wdev->links[link_id].client.current_bss &&
                            (nla_put_u32(msg, NL80211_BSS_STATUS,
                                         NL80211_BSS_STATUS_ASSOCIATED) ||
                             (wdev->valid_links &&
                              (nla_put_u8(msg, NL80211_BSS_MLO_LINK_ID,
                                          link_id) ||
                               nla_put(msg, NL80211_BSS_MLD_ADDR, ETH_ALEN,
                                       wdev->u.client.connected_addr)))))
                                goto nla_put_failure;
                }
                break;
        case NL80211_IFTYPE_ADHOC:
                if (intbss == wdev->u.ibss.current_bss &&
                    nla_put_u32(msg, NL80211_BSS_STATUS,
                                NL80211_BSS_STATUS_IBSS_JOINED))
                        goto nla_put_failure;
                break;
        default:
                break;
        }

        if (nla_put_u32(msg, NL80211_BSS_USE_FOR, res->use_for))
                goto nla_put_failure;

        if (res->cannot_use_reasons &&
            nla_put_u64_64bit(msg, NL80211_BSS_CANNOT_USE_REASONS,
                              res->cannot_use_reasons,
                              NL80211_BSS_PAD))
                goto nla_put_failure;

        nla_nest_end(msg, bss);

        genlmsg_end(msg, hdr);
        return 0;

 fail_unlock_rcu:
        rcu_read_unlock();
 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_dump_scan(struct sk_buff *skb, struct netlink_callback *cb)
{
        struct cfg80211_registered_device *rdev;
        struct cfg80211_internal_bss *scan;
        struct wireless_dev *wdev;
        struct nlattr **attrbuf;
        int start = cb->args[2], idx = 0;
        bool dump_include_use_data;
        int err;

        attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf), GFP_KERNEL);
        if (!attrbuf)
                return -ENOMEM;

        err = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, attrbuf);
        if (err) {
                kfree(attrbuf);
                return err;
        }
        /* nl80211_prepare_wdev_dump acquired it in the successful case */
        __acquire(&rdev->wiphy.mtx);

        dump_include_use_data =
                attrbuf[NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA];
        kfree(attrbuf);

        spin_lock_bh(&rdev->bss_lock);

        /*
         * dump_scan will be called multiple times to break up the scan results
         * into multiple messages.  It is unlikely that any more bss-es will be
         * expired after the first call, so only call only call this on the
         * first dump_scan invocation.
         */
        if (start == 0)
                cfg80211_bss_expire(rdev);

        cb->seq = rdev->bss_generation;

        list_for_each_entry(scan, &rdev->bss_list, list) {
                if (++idx <= start)
                        continue;
                if (!dump_include_use_data &&
                    !(scan->pub.use_for & NL80211_BSS_USE_FOR_NORMAL))
                        continue;
                if (nl80211_send_bss(skb, cb,
                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                rdev, wdev, scan) < 0) {
                        idx--;
                        break;
                }
        }

        spin_unlock_bh(&rdev->bss_lock);

        cb->args[2] = idx;
        wiphy_unlock(&rdev->wiphy);

        return skb->len;
}

static int nl80211_send_survey(struct sk_buff *msg, u32 portid, u32 seq,
                               int flags, struct net_device *dev,
                               bool allow_radio_stats,
                               struct survey_info *survey)
{
        void *hdr;
        struct nlattr *infoattr;

        /* skip radio stats if userspace didn't request them */
        if (!survey->channel && !allow_radio_stats)
                return 0;

        hdr = nl80211hdr_put(msg, portid, seq, flags,
                             NL80211_CMD_NEW_SURVEY_RESULTS);
        if (!hdr)
                return -ENOMEM;

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
                goto nla_put_failure;

        infoattr = nla_nest_start_noflag(msg, NL80211_ATTR_SURVEY_INFO);
        if (!infoattr)
                goto nla_put_failure;

        if (survey->channel &&
            nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY,
                        survey->channel->center_freq))
                goto nla_put_failure;

        if (survey->channel && survey->channel->freq_offset &&
            nla_put_u32(msg, NL80211_SURVEY_INFO_FREQUENCY_OFFSET,
                        survey->channel->freq_offset))
                goto nla_put_failure;

        if ((survey->filled & SURVEY_INFO_NOISE_DBM) &&
            nla_put_u8(msg, NL80211_SURVEY_INFO_NOISE, survey->noise))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_IN_USE) &&
            nla_put_flag(msg, NL80211_SURVEY_INFO_IN_USE))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME,
                        survey->time, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME_BUSY) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BUSY,
                              survey->time_busy, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME_EXT_BUSY) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_EXT_BUSY,
                              survey->time_ext_busy, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME_RX) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_RX,
                              survey->time_rx, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME_TX) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_TX,
                              survey->time_tx, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME_SCAN) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_SCAN,
                              survey->time_scan, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;
        if ((survey->filled & SURVEY_INFO_TIME_BSS_RX) &&
            nla_put_u64_64bit(msg, NL80211_SURVEY_INFO_TIME_BSS_RX,
                              survey->time_bss_rx, NL80211_SURVEY_INFO_PAD))
                goto nla_put_failure;

        nla_nest_end(msg, infoattr);

        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int nl80211_dump_survey(struct sk_buff *skb, struct netlink_callback *cb)
{
        struct nlattr **attrbuf;
        struct survey_info survey;
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        int survey_idx = cb->args[2];
        int res;
        bool radio_stats;

        attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf), GFP_KERNEL);
        if (!attrbuf)
                return -ENOMEM;

        res = nl80211_prepare_wdev_dump(cb, &rdev, &wdev, attrbuf);
        if (res) {
                kfree(attrbuf);
                return res;
        }
        /* nl80211_prepare_wdev_dump acquired it in the successful case */
        __acquire(&rdev->wiphy.mtx);

        /* prepare_wdev_dump parsed the attributes */
        radio_stats = attrbuf[NL80211_ATTR_SURVEY_RADIO_STATS];

        if (!wdev->netdev) {
                res = -EINVAL;
                goto out_err;
        }

        if (!rdev->ops->dump_survey) {
                res = -EOPNOTSUPP;
                goto out_err;
        }

        while (1) {
                res = rdev_dump_survey(rdev, wdev->netdev, survey_idx, &survey);
                if (res == -ENOENT)
                        break;
                if (res)
                        goto out_err;

                /* don't send disabled channels, but do send non-channel data */
                if (survey.channel &&
                    survey.channel->flags & IEEE80211_CHAN_DISABLED) {
                        survey_idx++;
                        continue;
                }

                if (nl80211_send_survey(skb,
                                NETLINK_CB(cb->skb).portid,
                                cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                wdev->netdev, radio_stats, &survey) < 0)
                        goto out;
                survey_idx++;
        }

 out:
        cb->args[2] = survey_idx;
        res = skb->len;
 out_err:
        kfree(attrbuf);
        wiphy_unlock(&rdev->wiphy);
        return res;
}

static int nl80211_authenticate(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct ieee80211_channel *chan;
        const u8 *bssid, *ssid;
        int err, ssid_len;
        enum nl80211_auth_type auth_type;
        struct key_parse key;
        bool local_state_change;
        struct cfg80211_auth_request req = {};
        u32 freq;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_AUTH_TYPE])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_SSID])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
                return -EINVAL;

        err = nl80211_parse_key(info, &key);
        if (err)
                return err;

        if (key.idx >= 0) {
                if (key.type != -1 && key.type != NL80211_KEYTYPE_GROUP)
                        return -EINVAL;
                if (!key.p.key || !key.p.key_len)
                        return -EINVAL;
                if ((key.p.cipher != WLAN_CIPHER_SUITE_WEP40 ||
                     key.p.key_len != WLAN_KEY_LEN_WEP40) &&
                    (key.p.cipher != WLAN_CIPHER_SUITE_WEP104 ||
                     key.p.key_len != WLAN_KEY_LEN_WEP104))
                        return -EINVAL;
                if (key.idx > 3)
                        return -EINVAL;
        } else {
                key.p.key_len = 0;
                key.p.key = NULL;
        }

        if (key.idx >= 0) {
                int i;
                bool ok = false;

                for (i = 0; i < rdev->wiphy.n_cipher_suites; i++) {
                        if (key.p.cipher == rdev->wiphy.cipher_suites[i]) {
                                ok = true;
                                break;
                        }
                }
                if (!ok)
                        return -EINVAL;
        }

        if (!rdev->ops->auth)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
        freq = MHZ_TO_KHZ(nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]));
        if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
                freq +=
                    nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);

        chan = nl80211_get_valid_chan(&rdev->wiphy, freq);
        if (!chan)
                return -EINVAL;

        ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
        ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

        if (info->attrs[NL80211_ATTR_IE]) {
                req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        }

        auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
        if (!nl80211_valid_auth_type(rdev, auth_type, NL80211_CMD_AUTHENTICATE))
                return -EINVAL;

        if ((auth_type == NL80211_AUTHTYPE_SAE ||
             auth_type == NL80211_AUTHTYPE_FILS_SK ||
             auth_type == NL80211_AUTHTYPE_FILS_SK_PFS ||
             auth_type == NL80211_AUTHTYPE_FILS_PK) &&
            !info->attrs[NL80211_ATTR_AUTH_DATA])
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_AUTH_DATA]) {
                if (auth_type != NL80211_AUTHTYPE_SAE &&
                    auth_type != NL80211_AUTHTYPE_FILS_SK &&
                    auth_type != NL80211_AUTHTYPE_FILS_SK_PFS &&
                    auth_type != NL80211_AUTHTYPE_FILS_PK)
                        return -EINVAL;
                req.auth_data = nla_data(info->attrs[NL80211_ATTR_AUTH_DATA]);
                req.auth_data_len = nla_len(info->attrs[NL80211_ATTR_AUTH_DATA]);
        }

        local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];

        /*
         * Since we no longer track auth state, ignore
         * requests to only change local state.
         */
        if (local_state_change)
                return 0;

        req.auth_type = auth_type;
        req.key = key.p.key;
        req.key_len = key.p.key_len;
        req.key_idx = key.idx;
        req.link_id = nl80211_link_id_or_invalid(info->attrs);
        if (req.link_id >= 0) {
                if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_MLO))
                        return -EINVAL;
                if (!info->attrs[NL80211_ATTR_MLD_ADDR])
                        return -EINVAL;
                req.ap_mld_addr = nla_data(info->attrs[NL80211_ATTR_MLD_ADDR]);
                if (!is_valid_ether_addr(req.ap_mld_addr))
                        return -EINVAL;
        }

        req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
                                   IEEE80211_BSS_TYPE_ESS,
                                   IEEE80211_PRIVACY_ANY);
        if (!req.bss)
                return -ENOENT;

        err = cfg80211_mlme_auth(rdev, dev, &req);

        cfg80211_put_bss(&rdev->wiphy, req.bss);

        return err;
}

static int validate_pae_over_nl80211(struct cfg80211_registered_device *rdev,
                                     struct genl_info *info)
{
        if (!info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
                GENL_SET_ERR_MSG(info, "SOCKET_OWNER not set");
                return -EINVAL;
        }

        if (!rdev->ops->tx_control_port ||
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211))
                return -EOPNOTSUPP;

        return 0;
}

static int nl80211_crypto_settings(struct cfg80211_registered_device *rdev,
                                   struct genl_info *info,
                                   struct cfg80211_crypto_settings *settings,
                                   int cipher_limit)
{
        memset(settings, 0, sizeof(*settings));

        settings->control_port = info->attrs[NL80211_ATTR_CONTROL_PORT];

        if (info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
                u16 proto;

                proto = nla_get_u16(
                        info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
                settings->control_port_ethertype = cpu_to_be16(proto);
                if (!(rdev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL) &&
                    proto != ETH_P_PAE)
                        return -EINVAL;
                if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT])
                        settings->control_port_no_encrypt = true;
        } else
                settings->control_port_ethertype = cpu_to_be16(ETH_P_PAE);

        if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
                int r = validate_pae_over_nl80211(rdev, info);

                if (r < 0)
                        return r;

                settings->control_port_over_nl80211 = true;

                if (info->attrs[NL80211_ATTR_CONTROL_PORT_NO_PREAUTH])
                        settings->control_port_no_preauth = true;
        }

        if (info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]) {
                void *data;
                int len, i;

                data = nla_data(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
                len = nla_len(info->attrs[NL80211_ATTR_CIPHER_SUITES_PAIRWISE]);
                settings->n_ciphers_pairwise = len / sizeof(u32);

                if (len % sizeof(u32))
                        return -EINVAL;

                if (settings->n_ciphers_pairwise > cipher_limit)
                        return -EINVAL;

                memcpy(settings->ciphers_pairwise, data, len);

                for (i = 0; i < settings->n_ciphers_pairwise; i++)
                        if (!cfg80211_supported_cipher_suite(
                                        &rdev->wiphy,
                                        settings->ciphers_pairwise[i]))
                                return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]) {
                settings->cipher_group =
                        nla_get_u32(info->attrs[NL80211_ATTR_CIPHER_SUITE_GROUP]);
                if (!cfg80211_supported_cipher_suite(&rdev->wiphy,
                                                     settings->cipher_group))
                        return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_WPA_VERSIONS])
                settings->wpa_versions =
                        nla_get_u32(info->attrs[NL80211_ATTR_WPA_VERSIONS]);

        if (info->attrs[NL80211_ATTR_AKM_SUITES]) {
                void *data;
                int len;

                data = nla_data(info->attrs[NL80211_ATTR_AKM_SUITES]);
                len = nla_len(info->attrs[NL80211_ATTR_AKM_SUITES]);
                settings->n_akm_suites = len / sizeof(u32);

                if (len % sizeof(u32))
                        return -EINVAL;

                if (settings->n_akm_suites > rdev->wiphy.max_num_akm_suites)
                        return -EINVAL;

                memcpy(settings->akm_suites, data, len);
        }

        if (info->attrs[NL80211_ATTR_PMK]) {
                if (nla_len(info->attrs[NL80211_ATTR_PMK]) != WLAN_PMK_LEN)
                        return -EINVAL;
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_PSK) &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_4WAY_HANDSHAKE_AP_PSK))
                        return -EINVAL;
                settings->psk = nla_data(info->attrs[NL80211_ATTR_PMK]);
        }

        if (info->attrs[NL80211_ATTR_SAE_PASSWORD]) {
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_SAE_OFFLOAD) &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_SAE_OFFLOAD_AP))
                        return -EINVAL;
                settings->sae_pwd =
                        nla_data(info->attrs[NL80211_ATTR_SAE_PASSWORD]);
                settings->sae_pwd_len =
                        nla_len(info->attrs[NL80211_ATTR_SAE_PASSWORD]);
        }

        if (info->attrs[NL80211_ATTR_SAE_PWE])
                settings->sae_pwe =
                        nla_get_u8(info->attrs[NL80211_ATTR_SAE_PWE]);
        else
                settings->sae_pwe = NL80211_SAE_PWE_UNSPECIFIED;

        return 0;
}

static struct cfg80211_bss *nl80211_assoc_bss(struct cfg80211_registered_device *rdev,
                                              const u8 *ssid, int ssid_len,
                                              struct nlattr **attrs,
                                              int assoc_link_id, int link_id)
{
        struct ieee80211_channel *chan;
        struct cfg80211_bss *bss;
        const u8 *bssid;
        u32 freq, use_for = 0;

        if (!attrs[NL80211_ATTR_MAC] || !attrs[NL80211_ATTR_WIPHY_FREQ])
                return ERR_PTR(-EINVAL);

        bssid = nla_data(attrs[NL80211_ATTR_MAC]);

        freq = MHZ_TO_KHZ(nla_get_u32(attrs[NL80211_ATTR_WIPHY_FREQ]));
        if (attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
                freq += nla_get_u32(attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);

        chan = nl80211_get_valid_chan(&rdev->wiphy, freq);
        if (!chan)
                return ERR_PTR(-EINVAL);

        if (assoc_link_id >= 0)
                use_for = NL80211_BSS_USE_FOR_MLD_LINK;
        if (assoc_link_id == link_id)
                use_for |= NL80211_BSS_USE_FOR_NORMAL;

        bss = __cfg80211_get_bss(&rdev->wiphy, chan, bssid,
                                 ssid, ssid_len,
                                 IEEE80211_BSS_TYPE_ESS,
                                 IEEE80211_PRIVACY_ANY,
                                 use_for);
        if (!bss)
                return ERR_PTR(-ENOENT);

        return bss;
}

static int nl80211_associate(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_assoc_request req = {};
        struct nlattr **attrs = NULL;
        const u8 *ap_addr, *ssid;
        unsigned int link_id;
        int err, ssid_len;

        if (dev->ieee80211_ptr->conn_owner_nlportid &&
            dev->ieee80211_ptr->conn_owner_nlportid != info->snd_portid)
                return -EPERM;

        if (!info->attrs[NL80211_ATTR_SSID])
                return -EINVAL;

        if (!rdev->ops->assoc)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
        ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

        if (info->attrs[NL80211_ATTR_IE]) {
                req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);

                if (cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
                                           req.ie, req.ie_len)) {
                        NL_SET_ERR_MSG_ATTR(info->extack,
                                            info->attrs[NL80211_ATTR_IE],
                                            "non-inheritance makes no sense");
                        return -EINVAL;
                }
        }

        if (info->attrs[NL80211_ATTR_USE_MFP]) {
                enum nl80211_mfp mfp =
                        nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
                if (mfp == NL80211_MFP_REQUIRED)
                        req.use_mfp = true;
                else if (mfp != NL80211_MFP_NO)
                        return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_PREV_BSSID])
                req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
                req.flags |= ASSOC_REQ_DISABLE_HT;

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
                memcpy(&req.ht_capa_mask,
                       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
                       sizeof(req.ht_capa_mask));

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
                if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
                        return -EINVAL;
                memcpy(&req.ht_capa,
                       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
                       sizeof(req.ht_capa));
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
                req.flags |= ASSOC_REQ_DISABLE_VHT;

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HE]))
                req.flags |= ASSOC_REQ_DISABLE_HE;

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_EHT]))
                req.flags |= ASSOC_REQ_DISABLE_EHT;

        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
                memcpy(&req.vht_capa_mask,
                       nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
                       sizeof(req.vht_capa_mask));

        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
                if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
                        return -EINVAL;
                memcpy(&req.vht_capa,
                       nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
                       sizeof(req.vht_capa));
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
                if (!((rdev->wiphy.features &
                        NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
                       (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_RRM))
                        return -EINVAL;
                req.flags |= ASSOC_REQ_USE_RRM;
        }

        if (info->attrs[NL80211_ATTR_FILS_KEK]) {
                req.fils_kek = nla_data(info->attrs[NL80211_ATTR_FILS_KEK]);
                req.fils_kek_len = nla_len(info->attrs[NL80211_ATTR_FILS_KEK]);
                if (!info->attrs[NL80211_ATTR_FILS_NONCES])
                        return -EINVAL;
                req.fils_nonces =
                        nla_data(info->attrs[NL80211_ATTR_FILS_NONCES]);
        }

        if (info->attrs[NL80211_ATTR_S1G_CAPABILITY_MASK]) {
                if (!info->attrs[NL80211_ATTR_S1G_CAPABILITY])
                        return -EINVAL;
                memcpy(&req.s1g_capa_mask,
                       nla_data(info->attrs[NL80211_ATTR_S1G_CAPABILITY_MASK]),
                       sizeof(req.s1g_capa_mask));
        }

        if (info->attrs[NL80211_ATTR_S1G_CAPABILITY]) {
                if (!info->attrs[NL80211_ATTR_S1G_CAPABILITY_MASK])
                        return -EINVAL;
                memcpy(&req.s1g_capa,
                       nla_data(info->attrs[NL80211_ATTR_S1G_CAPABILITY]),
                       sizeof(req.s1g_capa));
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_ASSOC_SPP_AMSDU])) {
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT)) {
                        GENL_SET_ERR_MSG(info, "SPP A-MSDUs not supported");
                        return -EINVAL;
                }
                req.flags |= ASSOC_REQ_SPP_AMSDU;
        }

        req.link_id = nl80211_link_id_or_invalid(info->attrs);

        if (info->attrs[NL80211_ATTR_MLO_LINKS]) {
                unsigned int attrsize = NUM_NL80211_ATTR * sizeof(*attrs);
                struct nlattr *link;
                int rem = 0;

                if (req.link_id < 0)
                        return -EINVAL;

                if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_MLO))
                        return -EINVAL;

                if (info->attrs[NL80211_ATTR_MAC] ||
                    info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
                    !info->attrs[NL80211_ATTR_MLD_ADDR])
                        return -EINVAL;

                req.ap_mld_addr = nla_data(info->attrs[NL80211_ATTR_MLD_ADDR]);
                ap_addr = req.ap_mld_addr;

                attrs = kzalloc(attrsize, GFP_KERNEL);
                if (!attrs)
                        return -ENOMEM;

                nla_for_each_nested(link,
                                    info->attrs[NL80211_ATTR_MLO_LINKS],
                                    rem) {
                        memset(attrs, 0, attrsize);

                        nla_parse_nested(attrs, NL80211_ATTR_MAX,
                                         link, NULL, NULL);

                        if (!attrs[NL80211_ATTR_MLO_LINK_ID]) {
                                err = -EINVAL;
                                NL_SET_BAD_ATTR(info->extack, link);
                                goto free;
                        }

                        link_id = nla_get_u8(attrs[NL80211_ATTR_MLO_LINK_ID]);
                        /* cannot use the same link ID again */
                        if (req.links[link_id].bss) {
                                err = -EINVAL;
                                NL_SET_BAD_ATTR(info->extack, link);
                                goto free;
                        }
                        req.links[link_id].bss =
                                nl80211_assoc_bss(rdev, ssid, ssid_len, attrs,
                                                  req.link_id, link_id);
                        if (IS_ERR(req.links[link_id].bss)) {
                                err = PTR_ERR(req.links[link_id].bss);
                                req.links[link_id].bss = NULL;
                                NL_SET_ERR_MSG_ATTR(info->extack,
                                                    link, "Error fetching BSS for link");
                                goto free;
                        }

                        if (attrs[NL80211_ATTR_IE]) {
                                req.links[link_id].elems =
                                        nla_data(attrs[NL80211_ATTR_IE]);
                                req.links[link_id].elems_len =
                                        nla_len(attrs[NL80211_ATTR_IE]);

                                if (cfg80211_find_elem(WLAN_EID_FRAGMENT,
                                                       req.links[link_id].elems,
                                                       req.links[link_id].elems_len)) {
                                        NL_SET_ERR_MSG_ATTR(info->extack,
                                                            attrs[NL80211_ATTR_IE],
                                                            "cannot deal with fragmentation");
                                        err = -EINVAL;
                                        goto free;
                                }

                                if (cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
                                                           req.links[link_id].elems,
                                                           req.links[link_id].elems_len)) {
                                        NL_SET_ERR_MSG_ATTR(info->extack,
                                                            attrs[NL80211_ATTR_IE],
                                                            "cannot deal with non-inheritance");
                                        err = -EINVAL;
                                        goto free;
                                }
                        }

                        req.links[link_id].disabled =
                                nla_get_flag(attrs[NL80211_ATTR_MLO_LINK_DISABLED]);
                }

                if (!req.links[req.link_id].bss) {
                        err = -EINVAL;
                        goto free;
                }

                if (req.links[req.link_id].elems_len) {
                        GENL_SET_ERR_MSG(info,
                                         "cannot have per-link elems on assoc link");
                        err = -EINVAL;
                        goto free;
                }

                if (req.links[req.link_id].disabled) {
                        GENL_SET_ERR_MSG(info,
                                         "cannot have assoc link disabled");
                        err = -EINVAL;
                        goto free;
                }

                kfree(attrs);
                attrs = NULL;
        } else {
                if (req.link_id >= 0)
                        return -EINVAL;

                req.bss = nl80211_assoc_bss(rdev, ssid, ssid_len, info->attrs,
                                            -1, -1);
                if (IS_ERR(req.bss))
                        return PTR_ERR(req.bss);
                ap_addr = req.bss->bssid;
        }

        err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);
        if (!err) {
                struct nlattr *link;
                int rem = 0;

                err = cfg80211_mlme_assoc(rdev, dev, &req,
                                          info->extack);

                if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
                        dev->ieee80211_ptr->conn_owner_nlportid =
                                info->snd_portid;
                        memcpy(dev->ieee80211_ptr->disconnect_bssid,
                               ap_addr, ETH_ALEN);
                }

                /* Report error from first problematic link */
                if (info->attrs[NL80211_ATTR_MLO_LINKS]) {
                        nla_for_each_nested(link,
                                            info->attrs[NL80211_ATTR_MLO_LINKS],
                                            rem) {
                                struct nlattr *link_id_attr =
                                        nla_find_nested(link, NL80211_ATTR_MLO_LINK_ID);

                                if (!link_id_attr)
                                        continue;

                                link_id = nla_get_u8(link_id_attr);

                                if (link_id == req.link_id)
                                        continue;

                                if (!req.links[link_id].error ||
                                    WARN_ON(req.links[link_id].error > 0))
                                        continue;

                                WARN_ON(err >= 0);

                                NL_SET_BAD_ATTR(info->extack, link);
                                err = req.links[link_id].error;
                                break;
                        }
                }
        }

free:
        for (link_id = 0; link_id < ARRAY_SIZE(req.links); link_id++)
                cfg80211_put_bss(&rdev->wiphy, req.links[link_id].bss);
        cfg80211_put_bss(&rdev->wiphy, req.bss);
        kfree(attrs);

        return err;
}

static int nl80211_deauthenticate(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        const u8 *ie = NULL, *bssid;
        int ie_len = 0;
        u16 reason_code;
        bool local_state_change;

        if (dev->ieee80211_ptr->conn_owner_nlportid &&
            dev->ieee80211_ptr->conn_owner_nlportid != info->snd_portid)
                return -EPERM;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_REASON_CODE])
                return -EINVAL;

        if (!rdev->ops->deauth)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);

        reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
        if (reason_code == 0) {
                /* Reason Code 0 is reserved */
                return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_IE]) {
                ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        }

        local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];

        return cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason_code,
                                    local_state_change);
}

static int nl80211_disassociate(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        const u8 *ie = NULL, *bssid;
        int ie_len = 0;
        u16 reason_code;
        bool local_state_change;

        if (dev->ieee80211_ptr->conn_owner_nlportid &&
            dev->ieee80211_ptr->conn_owner_nlportid != info->snd_portid)
                return -EPERM;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_REASON_CODE])
                return -EINVAL;

        if (!rdev->ops->disassoc)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);

        reason_code = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);
        if (reason_code == 0) {
                /* Reason Code 0 is reserved */
                return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_IE]) {
                ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        }

        local_state_change = !!info->attrs[NL80211_ATTR_LOCAL_STATE_CHANGE];

        return cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason_code,
                                      local_state_change);
}

static bool
nl80211_parse_mcast_rate(struct cfg80211_registered_device *rdev,
                         int mcast_rate[NUM_NL80211_BANDS],
                         int rateval)
{
        struct wiphy *wiphy = &rdev->wiphy;
        bool found = false;
        int band, i;

        for (band = 0; band < NUM_NL80211_BANDS; band++) {
                struct ieee80211_supported_band *sband;

                sband = wiphy->bands[band];
                if (!sband)
                        continue;

                for (i = 0; i < sband->n_bitrates; i++) {
                        if (sband->bitrates[i].bitrate == rateval) {
                                mcast_rate[band] = i + 1;
                                found = true;
                                break;
                        }
                }
        }

        return found;
}

static int nl80211_join_ibss(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_ibss_params ibss;
        struct wiphy *wiphy;
        struct cfg80211_cached_keys *connkeys = NULL;
        int err;

        memset(&ibss, 0, sizeof(ibss));

        if (!info->attrs[NL80211_ATTR_SSID] ||
            !nla_len(info->attrs[NL80211_ATTR_SSID]))
                return -EINVAL;

        ibss.beacon_interval = 100;

        if (info->attrs[NL80211_ATTR_BEACON_INTERVAL])
                ibss.beacon_interval =
                        nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);

        err = cfg80211_validate_beacon_int(rdev, NL80211_IFTYPE_ADHOC,
                                           ibss.beacon_interval);
        if (err)
                return err;

        if (!rdev->ops->join_ibss)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
                return -EOPNOTSUPP;

        wiphy = &rdev->wiphy;

        if (info->attrs[NL80211_ATTR_MAC]) {
                ibss.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);

                if (!is_valid_ether_addr(ibss.bssid))
                        return -EINVAL;
        }
        ibss.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
        ibss.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

        if (info->attrs[NL80211_ATTR_IE]) {
                ibss.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                ibss.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        }

        err = nl80211_parse_chandef(rdev, info, &ibss.chandef);
        if (err)
                return err;

        if (!cfg80211_reg_can_beacon(&rdev->wiphy, &ibss.chandef,
                                     NL80211_IFTYPE_ADHOC))
                return -EINVAL;

        switch (ibss.chandef.width) {
        case NL80211_CHAN_WIDTH_5:
        case NL80211_CHAN_WIDTH_10:
        case NL80211_CHAN_WIDTH_20_NOHT:
                break;
        case NL80211_CHAN_WIDTH_20:
        case NL80211_CHAN_WIDTH_40:
                if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
                        return -EINVAL;
                break;
        case NL80211_CHAN_WIDTH_80:
        case NL80211_CHAN_WIDTH_80P80:
        case NL80211_CHAN_WIDTH_160:
                if (!(rdev->wiphy.features & NL80211_FEATURE_HT_IBSS))
                        return -EINVAL;
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_VHT_IBSS))
                        return -EINVAL;
                break;
        case NL80211_CHAN_WIDTH_320:
                return -EINVAL;
        default:
                return -EINVAL;
        }

        ibss.channel_fixed = !!info->attrs[NL80211_ATTR_FREQ_FIXED];
        ibss.privacy = !!info->attrs[NL80211_ATTR_PRIVACY];

        if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
                u8 *rates =
                        nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
                int n_rates =
                        nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
                struct ieee80211_supported_band *sband =
                        wiphy->bands[ibss.chandef.chan->band];

                err = ieee80211_get_ratemask(sband, rates, n_rates,
                                             &ibss.basic_rates);
                if (err)
                        return err;
        }

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
                memcpy(&ibss.ht_capa_mask,
                       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
                       sizeof(ibss.ht_capa_mask));

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
                if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
                        return -EINVAL;
                memcpy(&ibss.ht_capa,
                       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
                       sizeof(ibss.ht_capa));
        }

        if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
            !nl80211_parse_mcast_rate(rdev, ibss.mcast_rate,
                        nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
                return -EINVAL;

        if (ibss.privacy && info->attrs[NL80211_ATTR_KEYS]) {
                bool no_ht = false;

                connkeys = nl80211_parse_connkeys(rdev, info, &no_ht);
                if (IS_ERR(connkeys))
                        return PTR_ERR(connkeys);

                if ((ibss.chandef.width != NL80211_CHAN_WIDTH_20_NOHT) &&
                    no_ht) {
                        kfree_sensitive(connkeys);
                        return -EINVAL;
                }
        }

        ibss.control_port =
                nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT]);

        if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
                int r = validate_pae_over_nl80211(rdev, info);

                if (r < 0) {
                        kfree_sensitive(connkeys);
                        return r;
                }

                ibss.control_port_over_nl80211 = true;
        }

        ibss.userspace_handles_dfs =
                nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);

        err = __cfg80211_join_ibss(rdev, dev, &ibss, connkeys);
        if (err)
                kfree_sensitive(connkeys);
        else if (info->attrs[NL80211_ATTR_SOCKET_OWNER])
                dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;

        return err;
}

static int nl80211_leave_ibss(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];

        if (!rdev->ops->leave_ibss)
                return -EOPNOTSUPP;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC)
                return -EOPNOTSUPP;

        return cfg80211_leave_ibss(rdev, dev, false);
}

static int nl80211_set_mcast_rate(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        int mcast_rate[NUM_NL80211_BANDS];
        u32 nla_rate;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_ADHOC &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_OCB)
                return -EOPNOTSUPP;

        if (!rdev->ops->set_mcast_rate)
                return -EOPNOTSUPP;

        memset(mcast_rate, 0, sizeof(mcast_rate));

        if (!info->attrs[NL80211_ATTR_MCAST_RATE])
                return -EINVAL;

        nla_rate = nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE]);
        if (!nl80211_parse_mcast_rate(rdev, mcast_rate, nla_rate))
                return -EINVAL;

        return rdev_set_mcast_rate(rdev, dev, mcast_rate);
}

static struct sk_buff *
__cfg80211_alloc_vendor_skb(struct cfg80211_registered_device *rdev,
                            struct wireless_dev *wdev, int approxlen,
                            u32 portid, u32 seq, enum nl80211_commands cmd,
                            enum nl80211_attrs attr,
                            const struct nl80211_vendor_cmd_info *info,
                            gfp_t gfp)
{
        struct sk_buff *skb;
        void *hdr;
        struct nlattr *data;

        skb = nlmsg_new(approxlen + 100, gfp);
        if (!skb)
                return NULL;

        hdr = nl80211hdr_put(skb, portid, seq, 0, cmd);
        if (!hdr) {
                kfree_skb(skb);
                return NULL;
        }

        if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
                goto nla_put_failure;

        if (info) {
                if (nla_put_u32(skb, NL80211_ATTR_VENDOR_ID,
                                info->vendor_id))
                        goto nla_put_failure;
                if (nla_put_u32(skb, NL80211_ATTR_VENDOR_SUBCMD,
                                info->subcmd))
                        goto nla_put_failure;
        }

        if (wdev) {
                if (nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
                                      wdev_id(wdev), NL80211_ATTR_PAD))
                        goto nla_put_failure;
                if (wdev->netdev &&
                    nla_put_u32(skb, NL80211_ATTR_IFINDEX,
                                wdev->netdev->ifindex))
                        goto nla_put_failure;
        }

        data = nla_nest_start_noflag(skb, attr);
        if (!data)
                goto nla_put_failure;

        ((void **)skb->cb)[0] = rdev;
        ((void **)skb->cb)[1] = hdr;
        ((void **)skb->cb)[2] = data;

        return skb;

 nla_put_failure:
        kfree_skb(skb);
        return NULL;
}

struct sk_buff *__cfg80211_alloc_event_skb(struct wiphy *wiphy,
                                           struct wireless_dev *wdev,
                                           enum nl80211_commands cmd,
                                           enum nl80211_attrs attr,
                                           unsigned int portid,
                                           int vendor_event_idx,
                                           int approxlen, gfp_t gfp)
{
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        const struct nl80211_vendor_cmd_info *info;

        switch (cmd) {
        case NL80211_CMD_TESTMODE:
                if (WARN_ON(vendor_event_idx != -1))
                        return NULL;
                info = NULL;
                break;
        case NL80211_CMD_VENDOR:
                if (WARN_ON(vendor_event_idx < 0 ||
                            vendor_event_idx >= wiphy->n_vendor_events))
                        return NULL;
                info = &wiphy->vendor_events[vendor_event_idx];
                break;
        default:
                WARN_ON(1);
                return NULL;
        }

        return __cfg80211_alloc_vendor_skb(rdev, wdev, approxlen, portid, 0,
                                           cmd, attr, info, gfp);
}
EXPORT_SYMBOL(__cfg80211_alloc_event_skb);

void __cfg80211_send_event_skb(struct sk_buff *skb, gfp_t gfp)
{
        struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
        void *hdr = ((void **)skb->cb)[1];
        struct nlmsghdr *nlhdr = nlmsg_hdr(skb);
        struct nlattr *data = ((void **)skb->cb)[2];
        enum nl80211_multicast_groups mcgrp = NL80211_MCGRP_TESTMODE;

        /* clear CB data for netlink core to own from now on */
        memset(skb->cb, 0, sizeof(skb->cb));

        nla_nest_end(skb, data);
        genlmsg_end(skb, hdr);

        if (nlhdr->nlmsg_pid) {
                genlmsg_unicast(wiphy_net(&rdev->wiphy), skb,
                                nlhdr->nlmsg_pid);
        } else {
                if (data->nla_type == NL80211_ATTR_VENDOR_DATA)
                        mcgrp = NL80211_MCGRP_VENDOR;

                genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
                                        skb, 0, mcgrp, gfp);
        }
}
EXPORT_SYMBOL(__cfg80211_send_event_skb);

#ifdef CONFIG_NL80211_TESTMODE
static int nl80211_testmode_do(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev;
        int err;

        lockdep_assert_held(&rdev->wiphy.mtx);

        wdev = __cfg80211_wdev_from_attrs(rdev, genl_info_net(info),
                                          info->attrs);

        if (!rdev->ops->testmode_cmd)
                return -EOPNOTSUPP;

        if (IS_ERR(wdev)) {
                err = PTR_ERR(wdev);
                if (err != -EINVAL)
                        return err;
                wdev = NULL;
        } else if (wdev->wiphy != &rdev->wiphy) {
                return -EINVAL;
        }

        if (!info->attrs[NL80211_ATTR_TESTDATA])
                return -EINVAL;

        rdev->cur_cmd_info = info;
        err = rdev_testmode_cmd(rdev, wdev,
                                nla_data(info->attrs[NL80211_ATTR_TESTDATA]),
                                nla_len(info->attrs[NL80211_ATTR_TESTDATA]));
        rdev->cur_cmd_info = NULL;

        return err;
}

static int nl80211_testmode_dump(struct sk_buff *skb,
                                 struct netlink_callback *cb)
{
        struct cfg80211_registered_device *rdev;
        struct nlattr **attrbuf = NULL;
        int err;
        long phy_idx;
        void *data = NULL;
        int data_len = 0;

        rtnl_lock();

        if (cb->args[0]) {
                /*
                 * 0 is a valid index, but not valid for args[0],
                 * so we need to offset by 1.
                 */
                phy_idx = cb->args[0] - 1;

                rdev = cfg80211_rdev_by_wiphy_idx(phy_idx);
                if (!rdev) {
                        err = -ENOENT;
                        goto out_err;
                }
        } else {
                attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf),
                                  GFP_KERNEL);
                if (!attrbuf) {
                        err = -ENOMEM;
                        goto out_err;
                }

                err = nlmsg_parse_deprecated(cb->nlh,
                                             GENL_HDRLEN + nl80211_fam.hdrsize,
                                             attrbuf, nl80211_fam.maxattr,
                                             nl80211_policy, NULL);
                if (err)
                        goto out_err;

                rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
                if (IS_ERR(rdev)) {
                        err = PTR_ERR(rdev);
                        goto out_err;
                }
                phy_idx = rdev->wiphy_idx;

                if (attrbuf[NL80211_ATTR_TESTDATA])
                        cb->args[1] = (long)attrbuf[NL80211_ATTR_TESTDATA];
        }

        if (cb->args[1]) {
                data = nla_data((void *)cb->args[1]);
                data_len = nla_len((void *)cb->args[1]);
        }

        if (!rdev->ops->testmode_dump) {
                err = -EOPNOTSUPP;
                goto out_err;
        }

        while (1) {
                void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
                                           cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                           NL80211_CMD_TESTMODE);
                struct nlattr *tmdata;

                if (!hdr)
                        break;

                if (nla_put_u32(skb, NL80211_ATTR_WIPHY, phy_idx)) {
                        genlmsg_cancel(skb, hdr);
                        break;
                }

                tmdata = nla_nest_start_noflag(skb, NL80211_ATTR_TESTDATA);
                if (!tmdata) {
                        genlmsg_cancel(skb, hdr);
                        break;
                }
                err = rdev_testmode_dump(rdev, skb, cb, data, data_len);
                nla_nest_end(skb, tmdata);

                if (err == -ENOBUFS || err == -ENOENT) {
                        genlmsg_cancel(skb, hdr);
                        break;
                } else if (err) {
                        genlmsg_cancel(skb, hdr);
                        goto out_err;
                }

                genlmsg_end(skb, hdr);
        }

        err = skb->len;
        /* see above */
        cb->args[0] = phy_idx + 1;
 out_err:
        kfree(attrbuf);
        rtnl_unlock();
        return err;
}
#endif

static int nl80211_connect(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_connect_params connect;
        struct wiphy *wiphy;
        struct cfg80211_cached_keys *connkeys = NULL;
        u32 freq = 0;
        int err;

        memset(&connect, 0, sizeof(connect));

        if (!info->attrs[NL80211_ATTR_SSID] ||
            !nla_len(info->attrs[NL80211_ATTR_SSID]))
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
                connect.auth_type =
                        nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
                if (!nl80211_valid_auth_type(rdev, connect.auth_type,
                                             NL80211_CMD_CONNECT))
                        return -EINVAL;
        } else
                connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;

        connect.privacy = info->attrs[NL80211_ATTR_PRIVACY];

        if (info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS] &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
                return -EINVAL;
        connect.want_1x = info->attrs[NL80211_ATTR_WANT_1X_4WAY_HS];

        err = nl80211_crypto_settings(rdev, info, &connect.crypto,
                                      NL80211_MAX_NR_CIPHER_SUITES);
        if (err)
                return err;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        wiphy = &rdev->wiphy;

        connect.bg_scan_period = -1;
        if (info->attrs[NL80211_ATTR_BG_SCAN_PERIOD] &&
                (wiphy->flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)) {
                connect.bg_scan_period =
                        nla_get_u16(info->attrs[NL80211_ATTR_BG_SCAN_PERIOD]);
        }

        if (info->attrs[NL80211_ATTR_MAC])
                connect.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
        else if (info->attrs[NL80211_ATTR_MAC_HINT])
                connect.bssid_hint =
                        nla_data(info->attrs[NL80211_ATTR_MAC_HINT]);
        connect.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
        connect.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);

        if (info->attrs[NL80211_ATTR_IE]) {
                connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        }

        if (info->attrs[NL80211_ATTR_USE_MFP]) {
                connect.mfp = nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);
                if (connect.mfp == NL80211_MFP_OPTIONAL &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_MFP_OPTIONAL))
                        return -EOPNOTSUPP;
        } else {
                connect.mfp = NL80211_MFP_NO;
        }

        if (info->attrs[NL80211_ATTR_PREV_BSSID])
                connect.prev_bssid =
                        nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);

        if (info->attrs[NL80211_ATTR_WIPHY_FREQ])
                freq = MHZ_TO_KHZ(nla_get_u32(
                                        info->attrs[NL80211_ATTR_WIPHY_FREQ]));
        if (info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET])
                freq +=
                    nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_OFFSET]);

        if (freq) {
                connect.channel = nl80211_get_valid_chan(wiphy, freq);
                if (!connect.channel)
                        return -EINVAL;
        } else if (info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]) {
                freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ_HINT]);
                freq = MHZ_TO_KHZ(freq);
                connect.channel_hint = nl80211_get_valid_chan(wiphy, freq);
                if (!connect.channel_hint)
                        return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_WIPHY_EDMG_CHANNELS]) {
                connect.edmg.channels =
                      nla_get_u8(info->attrs[NL80211_ATTR_WIPHY_EDMG_CHANNELS]);

                if (info->attrs[NL80211_ATTR_WIPHY_EDMG_BW_CONFIG])
                        connect.edmg.bw_config =
                                nla_get_u8(info->attrs[NL80211_ATTR_WIPHY_EDMG_BW_CONFIG]);
        }

        if (connect.privacy && info->attrs[NL80211_ATTR_KEYS]) {
                connkeys = nl80211_parse_connkeys(rdev, info, NULL);
                if (IS_ERR(connkeys))
                        return PTR_ERR(connkeys);
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))
                connect.flags |= ASSOC_REQ_DISABLE_HT;

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])
                memcpy(&connect.ht_capa_mask,
                       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),
                       sizeof(connect.ht_capa_mask));

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {
                if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]) {
                        kfree_sensitive(connkeys);
                        return -EINVAL;
                }
                memcpy(&connect.ht_capa,
                       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),
                       sizeof(connect.ht_capa));
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))
                connect.flags |= ASSOC_REQ_DISABLE_VHT;

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HE]))
                connect.flags |= ASSOC_REQ_DISABLE_HE;

        if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_EHT]))
                connect.flags |= ASSOC_REQ_DISABLE_EHT;

        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])
                memcpy(&connect.vht_capa_mask,
                       nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),
                       sizeof(connect.vht_capa_mask));

        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {
                if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]) {
                        kfree_sensitive(connkeys);
                        return -EINVAL;
                }
                memcpy(&connect.vht_capa,
                       nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),
                       sizeof(connect.vht_capa));
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_USE_RRM])) {
                if (!((rdev->wiphy.features &
                        NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES) &&
                       (rdev->wiphy.features & NL80211_FEATURE_QUIET)) &&
                    !wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_RRM)) {
                        kfree_sensitive(connkeys);
                        return -EINVAL;
                }
                connect.flags |= ASSOC_REQ_USE_RRM;
        }

        connect.pbss = nla_get_flag(info->attrs[NL80211_ATTR_PBSS]);
        if (connect.pbss && !rdev->wiphy.bands[NL80211_BAND_60GHZ]) {
                kfree_sensitive(connkeys);
                return -EOPNOTSUPP;
        }

        if (info->attrs[NL80211_ATTR_BSS_SELECT]) {
                /* bss selection makes no sense if bssid is set */
                if (connect.bssid) {
                        kfree_sensitive(connkeys);
                        return -EINVAL;
                }

                err = parse_bss_select(info->attrs[NL80211_ATTR_BSS_SELECT],
                                       wiphy, &connect.bss_select);
                if (err) {
                        kfree_sensitive(connkeys);
                        return err;
                }
        }

        if (wiphy_ext_feature_isset(&rdev->wiphy,
                                    NL80211_EXT_FEATURE_FILS_SK_OFFLOAD) &&
            info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] &&
            info->attrs[NL80211_ATTR_FILS_ERP_REALM] &&
            info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] &&
            info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
                connect.fils_erp_username =
                        nla_data(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
                connect.fils_erp_username_len =
                        nla_len(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
                connect.fils_erp_realm =
                        nla_data(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
                connect.fils_erp_realm_len =
                        nla_len(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
                connect.fils_erp_next_seq_num =
                        nla_get_u16(
                           info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM]);
                connect.fils_erp_rrk =
                        nla_data(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
                connect.fils_erp_rrk_len =
                        nla_len(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
        } else if (info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] ||
                   info->attrs[NL80211_ATTR_FILS_ERP_REALM] ||
                   info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] ||
                   info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
                kfree_sensitive(connkeys);
                return -EINVAL;
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_EXTERNAL_AUTH_SUPPORT])) {
                if (!info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
                        kfree_sensitive(connkeys);
                        GENL_SET_ERR_MSG(info,
                                         "external auth requires connection ownership");
                        return -EINVAL;
                }
                connect.flags |= CONNECT_REQ_EXTERNAL_AUTH_SUPPORT;
        }

        if (nla_get_flag(info->attrs[NL80211_ATTR_MLO_SUPPORT]))
                connect.flags |= CONNECT_REQ_MLO_SUPPORT;

        err = cfg80211_connect(rdev, dev, &connect, connkeys,
                               connect.prev_bssid);
        if (err)
                kfree_sensitive(connkeys);

        if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER]) {
                dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;
                if (connect.bssid)
                        memcpy(dev->ieee80211_ptr->disconnect_bssid,
                               connect.bssid, ETH_ALEN);
                else
                        eth_zero_addr(dev->ieee80211_ptr->disconnect_bssid);
        }

        return err;
}

static int nl80211_update_connect_params(struct sk_buff *skb,
                                         struct genl_info *info)
{
        struct cfg80211_connect_params connect = {};
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        bool fils_sk_offload;
        u32 auth_type;
        u32 changed = 0;

        if (!rdev->ops->update_connect_params)
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_IE]) {
                connect.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                connect.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
                changed |= UPDATE_ASSOC_IES;
        }

        fils_sk_offload = wiphy_ext_feature_isset(&rdev->wiphy,
                                                  NL80211_EXT_FEATURE_FILS_SK_OFFLOAD);

        /*
         * when driver supports fils-sk offload all attributes must be
         * provided. So the else covers "fils-sk-not-all" and
         * "no-fils-sk-any".
         */
        if (fils_sk_offload &&
            info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] &&
            info->attrs[NL80211_ATTR_FILS_ERP_REALM] &&
            info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] &&
            info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
                connect.fils_erp_username =
                        nla_data(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
                connect.fils_erp_username_len =
                        nla_len(info->attrs[NL80211_ATTR_FILS_ERP_USERNAME]);
                connect.fils_erp_realm =
                        nla_data(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
                connect.fils_erp_realm_len =
                        nla_len(info->attrs[NL80211_ATTR_FILS_ERP_REALM]);
                connect.fils_erp_next_seq_num =
                        nla_get_u16(
                           info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM]);
                connect.fils_erp_rrk =
                        nla_data(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
                connect.fils_erp_rrk_len =
                        nla_len(info->attrs[NL80211_ATTR_FILS_ERP_RRK]);
                changed |= UPDATE_FILS_ERP_INFO;
        } else if (info->attrs[NL80211_ATTR_FILS_ERP_USERNAME] ||
                   info->attrs[NL80211_ATTR_FILS_ERP_REALM] ||
                   info->attrs[NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM] ||
                   info->attrs[NL80211_ATTR_FILS_ERP_RRK]) {
                return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_AUTH_TYPE]) {
                auth_type = nla_get_u32(info->attrs[NL80211_ATTR_AUTH_TYPE]);
                if (!nl80211_valid_auth_type(rdev, auth_type,
                                             NL80211_CMD_CONNECT))
                        return -EINVAL;

                if (auth_type == NL80211_AUTHTYPE_FILS_SK &&
                    fils_sk_offload && !(changed & UPDATE_FILS_ERP_INFO))
                        return -EINVAL;

                connect.auth_type = auth_type;
                changed |= UPDATE_AUTH_TYPE;
        }

        if (!wdev->connected)
                return -ENOLINK;

        return rdev_update_connect_params(rdev, dev, &connect, changed);
}

static int nl80211_disconnect(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        u16 reason;

        if (dev->ieee80211_ptr->conn_owner_nlportid &&
            dev->ieee80211_ptr->conn_owner_nlportid != info->snd_portid)
                return -EPERM;

        if (!info->attrs[NL80211_ATTR_REASON_CODE])
                reason = WLAN_REASON_DEAUTH_LEAVING;
        else
                reason = nla_get_u16(info->attrs[NL80211_ATTR_REASON_CODE]);

        if (reason == 0)
                return -EINVAL;

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        return cfg80211_disconnect(rdev, dev, reason, true);
}

static int nl80211_wiphy_netns(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net *net;
        int err;

        if (info->attrs[NL80211_ATTR_PID]) {
                u32 pid = nla_get_u32(info->attrs[NL80211_ATTR_PID]);

                net = get_net_ns_by_pid(pid);
        } else if (info->attrs[NL80211_ATTR_NETNS_FD]) {
                u32 fd = nla_get_u32(info->attrs[NL80211_ATTR_NETNS_FD]);

                net = get_net_ns_by_fd(fd);
        } else {
                return -EINVAL;
        }

        if (IS_ERR(net))
                return PTR_ERR(net);

        err = 0;

        /* check if anything to do */
        if (!net_eq(wiphy_net(&rdev->wiphy), net))
                err = cfg80211_switch_netns(rdev, net);

        put_net(net);
        return err;
}

static int nl80211_set_pmksa(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_pmksa pmksa;
        bool ap_pmksa_caching_support = false;

        memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));

        ap_pmksa_caching_support = wiphy_ext_feature_isset(&rdev->wiphy,
                NL80211_EXT_FEATURE_AP_PMKSA_CACHING);

        if (!info->attrs[NL80211_ATTR_PMKID])
                return -EINVAL;

        pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);

        if (info->attrs[NL80211_ATTR_MAC]) {
                pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
        } else if (info->attrs[NL80211_ATTR_SSID] &&
                   info->attrs[NL80211_ATTR_FILS_CACHE_ID] &&
                   info->attrs[NL80211_ATTR_PMK]) {
                pmksa.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
                pmksa.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
                pmksa.cache_id = nla_data(info->attrs[NL80211_ATTR_FILS_CACHE_ID]);
        } else {
                return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_PMK]) {
                pmksa.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
                pmksa.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
        }

        if (info->attrs[NL80211_ATTR_PMK_LIFETIME])
                pmksa.pmk_lifetime =
                        nla_get_u32(info->attrs[NL80211_ATTR_PMK_LIFETIME]);

        if (info->attrs[NL80211_ATTR_PMK_REAUTH_THRESHOLD])
                pmksa.pmk_reauth_threshold =
                        nla_get_u8(info->attrs[NL80211_ATTR_PMK_REAUTH_THRESHOLD]);

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
            !((dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
               dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) &&
               ap_pmksa_caching_support))
                return -EOPNOTSUPP;

        if (!rdev->ops->set_pmksa)
                return -EOPNOTSUPP;

        return rdev_set_pmksa(rdev, dev, &pmksa);
}

static int nl80211_del_pmksa(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_pmksa pmksa;
        bool sae_offload_support = false;
        bool owe_offload_support = false;
        bool ap_pmksa_caching_support = false;

        memset(&pmksa, 0, sizeof(struct cfg80211_pmksa));

        sae_offload_support = wiphy_ext_feature_isset(&rdev->wiphy,
                NL80211_EXT_FEATURE_SAE_OFFLOAD);
        owe_offload_support = wiphy_ext_feature_isset(&rdev->wiphy,
                NL80211_EXT_FEATURE_OWE_OFFLOAD);
        ap_pmksa_caching_support = wiphy_ext_feature_isset(&rdev->wiphy,
                NL80211_EXT_FEATURE_AP_PMKSA_CACHING);

        if (info->attrs[NL80211_ATTR_PMKID])
                pmksa.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);

        if (info->attrs[NL80211_ATTR_MAC]) {
                pmksa.bssid = nla_data(info->attrs[NL80211_ATTR_MAC]);
        } else if (info->attrs[NL80211_ATTR_SSID]) {
                /* SSID based pmksa flush suppported only for FILS,
                 * OWE/SAE OFFLOAD cases
                 */
                if (info->attrs[NL80211_ATTR_FILS_CACHE_ID] &&
                    info->attrs[NL80211_ATTR_PMK]) {
                        pmksa.cache_id = nla_data(info->attrs[NL80211_ATTR_FILS_CACHE_ID]);
                } else if (!sae_offload_support && !owe_offload_support) {
                        return -EINVAL;
                }
                pmksa.ssid = nla_data(info->attrs[NL80211_ATTR_SSID]);
                pmksa.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
        } else {
                return -EINVAL;
        }

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT &&
            !((dev->ieee80211_ptr->iftype == NL80211_IFTYPE_AP ||
               dev->ieee80211_ptr->iftype == NL80211_IFTYPE_P2P_GO) &&
               ap_pmksa_caching_support))
                return -EOPNOTSUPP;

        if (!rdev->ops->del_pmksa)
                return -EOPNOTSUPP;

        return rdev_del_pmksa(rdev, dev, &pmksa);
}

static int nl80211_flush_pmksa(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];

        if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        if (!rdev->ops->flush_pmksa)
                return -EOPNOTSUPP;

        return rdev_flush_pmksa(rdev, dev);
}

static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        u8 action_code, dialog_token;
        u32 peer_capability = 0;
        u16 status_code;
        u8 *peer;
        int link_id;
        bool initiator;

        if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
            !rdev->ops->tdls_mgmt)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_TDLS_ACTION] ||
            !info->attrs[NL80211_ATTR_STATUS_CODE] ||
            !info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN] ||
            !info->attrs[NL80211_ATTR_IE] ||
            !info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        peer = nla_data(info->attrs[NL80211_ATTR_MAC]);
        action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);
        status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
        dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);
        initiator = nla_get_flag(info->attrs[NL80211_ATTR_TDLS_INITIATOR]);
        if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])
                peer_capability =
                        nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);
        link_id = nl80211_link_id_or_invalid(info->attrs);

        return rdev_tdls_mgmt(rdev, dev, peer, link_id, action_code,
                              dialog_token, status_code, peer_capability,
                              initiator,
                              nla_data(info->attrs[NL80211_ATTR_IE]),
                              nla_len(info->attrs[NL80211_ATTR_IE]));
}

static int nl80211_tdls_oper(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        enum nl80211_tdls_operation operation;
        u8 *peer;

        if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_TDLS) ||
            !rdev->ops->tdls_oper)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_TDLS_OPERATION] ||
            !info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        operation = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_OPERATION]);
        peer = nla_data(info->attrs[NL80211_ATTR_MAC]);

        return rdev_tdls_oper(rdev, dev, peer, operation);
}

static int nl80211_remain_on_channel(struct sk_buff *skb,
                                     struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct wireless_dev *wdev = info->user_ptr[1];
        struct cfg80211_chan_def chandef;
        struct sk_buff *msg;
        void *hdr;
        u64 cookie;
        u32 duration;
        int err;

        if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
            !info->attrs[NL80211_ATTR_DURATION])
                return -EINVAL;

        duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);

        if (!rdev->ops->remain_on_channel ||
            !(rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL))
                return -EOPNOTSUPP;

        /*
         * We should be on that channel for at least a minimum amount of
         * time (10ms) but no longer than the driver supports.
         */
        if (duration < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
            duration > rdev->wiphy.max_remain_on_channel_duration)
                return -EINVAL;

        err = nl80211_parse_chandef(rdev, info, &chandef);
        if (err)
                return err;

        if (!cfg80211_off_channel_oper_allowed(wdev, chandef.chan)) {
                const struct cfg80211_chan_def *oper_chandef, *compat_chandef;

                oper_chandef = wdev_chandef(wdev, link_id);

                if (WARN_ON(!oper_chandef)) {
                        /* cannot happen since we must beacon to get here */
                        WARN_ON(1);
                        return -EBUSY;
                }

                /* note: returns first one if identical chandefs */
                compat_chandef = cfg80211_chandef_compatible(&chandef,
                                                             oper_chandef);

                if (compat_chandef != &chandef)
                        return -EBUSY;
        }

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_REMAIN_ON_CHANNEL);
        if (!hdr) {
                err = -ENOBUFS;
                goto free_msg;
        }

        err = rdev_remain_on_channel(rdev, wdev, chandef.chan,
                                     duration, &cookie);

        if (err)
                goto free_msg;

        if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        return genlmsg_reply(msg, info);

 nla_put_failure:
        err = -ENOBUFS;
 free_msg:
        nlmsg_free(msg);
        return err;
}

static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
                                            struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        u64 cookie;

        if (!info->attrs[NL80211_ATTR_COOKIE])
                return -EINVAL;

        if (!rdev->ops->cancel_remain_on_channel)
                return -EOPNOTSUPP;

        cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);

        return rdev_cancel_remain_on_channel(rdev, wdev, cookie);
}

static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
                                       struct genl_info *info)
{
        struct cfg80211_bitrate_mask mask;
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        int err;

        if (!rdev->ops->set_bitrate_mask)
                return -EOPNOTSUPP;

        err = nl80211_parse_tx_bitrate_mask(info, info->attrs,
                                            NL80211_ATTR_TX_RATES, &mask,
                                            dev, true, link_id);
        if (err)
                return err;

        return rdev_set_bitrate_mask(rdev, dev, link_id, NULL, &mask);
}

static int nl80211_register_mgmt(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        u16 frame_type = IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION;

        if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_FRAME_TYPE])
                frame_type = nla_get_u16(info->attrs[NL80211_ATTR_FRAME_TYPE]);

        switch (wdev->iftype) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_ADHOC:
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_MESH_POINT:
        case NL80211_IFTYPE_P2P_GO:
        case NL80211_IFTYPE_P2P_DEVICE:
                break;
        case NL80211_IFTYPE_NAN:
                if (!wiphy_ext_feature_isset(wdev->wiphy,
                                             NL80211_EXT_FEATURE_SECURE_NAN))
                        return -EOPNOTSUPP;
                break;
        default:
                return -EOPNOTSUPP;
        }

        /* not much point in registering if we can't reply */
        if (!rdev->ops->mgmt_tx)
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_RECEIVE_MULTICAST] &&
            !wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_MULTICAST_REGISTRATIONS)) {
                GENL_SET_ERR_MSG(info,
                                 "multicast RX registrations are not supported");
                return -EOPNOTSUPP;
        }

        return cfg80211_mlme_register_mgmt(wdev, info->snd_portid, frame_type,
                                           nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
                                           nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]),
                                           info->attrs[NL80211_ATTR_RECEIVE_MULTICAST],
                                           info->extack);
}

static int nl80211_tx_mgmt(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        struct cfg80211_chan_def chandef;
        int err;
        void *hdr = NULL;
        u64 cookie;
        struct sk_buff *msg = NULL;
        struct cfg80211_mgmt_tx_params params = {
                .dont_wait_for_ack =
                        info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK],
        };

        if (!info->attrs[NL80211_ATTR_FRAME])
                return -EINVAL;

        if (!rdev->ops->mgmt_tx)
                return -EOPNOTSUPP;

        switch (wdev->iftype) {
        case NL80211_IFTYPE_P2P_DEVICE:
                if (!info->attrs[NL80211_ATTR_WIPHY_FREQ])
                        return -EINVAL;
                break;
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_ADHOC:
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_MESH_POINT:
        case NL80211_IFTYPE_P2P_GO:
                break;
        case NL80211_IFTYPE_NAN:
                if (!wiphy_ext_feature_isset(wdev->wiphy,
                                             NL80211_EXT_FEATURE_SECURE_NAN))
                        return -EOPNOTSUPP;
                break;
        default:
                return -EOPNOTSUPP;
        }

        if (info->attrs[NL80211_ATTR_DURATION]) {
                if (!(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
                        return -EINVAL;
                params.wait = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);

                /*
                 * We should wait on the channel for at least a minimum amount
                 * of time (10ms) but no longer than the driver supports.
                 */
                if (params.wait < NL80211_MIN_REMAIN_ON_CHANNEL_TIME ||
                    params.wait > rdev->wiphy.max_remain_on_channel_duration)
                        return -EINVAL;
        }

        params.offchan = info->attrs[NL80211_ATTR_OFFCHANNEL_TX_OK];

        if (params.offchan && !(rdev->wiphy.flags & WIPHY_FLAG_OFFCHAN_TX))
                return -EINVAL;

        params.no_cck = nla_get_flag(info->attrs[NL80211_ATTR_TX_NO_CCK_RATE]);

        /* get the channel if any has been specified, otherwise pass NULL to
         * the driver. The latter will use the current one
         */
        chandef.chan = NULL;
        if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
                err = nl80211_parse_chandef(rdev, info, &chandef);
                if (err)
                        return err;
        }

        if (!chandef.chan && params.offchan)
                return -EINVAL;

        if (params.offchan &&
            !cfg80211_off_channel_oper_allowed(wdev, chandef.chan))
                return -EBUSY;

        params.link_id = nl80211_link_id_or_invalid(info->attrs);
        /*
         * This now races due to the unlock, but we cannot check
         * the valid links for the _station_ anyway, so that's up
         * to the driver.
         */
        if (params.link_id >= 0 &&
            !(wdev->valid_links & BIT(params.link_id)))
                return -EINVAL;

        params.buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
        params.len = nla_len(info->attrs[NL80211_ATTR_FRAME]);

        err = nl80211_parse_counter_offsets(rdev, NULL, params.len, -1,
                                            info->attrs[NL80211_ATTR_CSA_C_OFFSETS_TX],
                                            &params.csa_offsets,
                                            &params.n_csa_offsets);
        if (err)
                return err;

        if (!params.dont_wait_for_ack) {
                msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
                if (!msg)
                        return -ENOMEM;

                hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                                     NL80211_CMD_FRAME);
                if (!hdr) {
                        err = -ENOBUFS;
                        goto free_msg;
                }
        }

        params.chan = chandef.chan;
        err = cfg80211_mlme_mgmt_tx(rdev, wdev, &params, &cookie);
        if (err)
                goto free_msg;

        if (msg) {
                if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
                                      NL80211_ATTR_PAD))
                        goto nla_put_failure;

                genlmsg_end(msg, hdr);
                return genlmsg_reply(msg, info);
        }

        return 0;

 nla_put_failure:
        err = -ENOBUFS;
 free_msg:
        nlmsg_free(msg);
        return err;
}

static int nl80211_tx_mgmt_cancel_wait(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        u64 cookie;

        if (!info->attrs[NL80211_ATTR_COOKIE])
                return -EINVAL;

        if (!rdev->ops->mgmt_tx_cancel_wait)
                return -EOPNOTSUPP;

        switch (wdev->iftype) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_ADHOC:
        case NL80211_IFTYPE_P2P_CLIENT:
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_AP_VLAN:
        case NL80211_IFTYPE_P2P_GO:
        case NL80211_IFTYPE_P2P_DEVICE:
                break;
        case NL80211_IFTYPE_NAN:
                if (!wiphy_ext_feature_isset(wdev->wiphy,
                                             NL80211_EXT_FEATURE_SECURE_NAN))
                        return -EOPNOTSUPP;
                break;
        default:
                return -EOPNOTSUPP;
        }

        cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);

        return rdev_mgmt_tx_cancel_wait(rdev, wdev, cookie);
}

static int nl80211_set_power_save(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev;
        struct net_device *dev = info->user_ptr[1];
        u8 ps_state;
        bool state;
        int err;

        if (!info->attrs[NL80211_ATTR_PS_STATE])
                return -EINVAL;

        ps_state = nla_get_u32(info->attrs[NL80211_ATTR_PS_STATE]);

        wdev = dev->ieee80211_ptr;

        if (!rdev->ops->set_power_mgmt)
                return -EOPNOTSUPP;

        state = (ps_state == NL80211_PS_ENABLED) ? true : false;

        if (state == wdev->ps)
                return 0;

        err = rdev_set_power_mgmt(rdev, dev, state, wdev->ps_timeout);
        if (!err)
                wdev->ps = state;
        return err;
}

static int nl80211_get_power_save(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        enum nl80211_ps_state ps_state;
        struct wireless_dev *wdev;
        struct net_device *dev = info->user_ptr[1];
        struct sk_buff *msg;
        void *hdr;
        int err;

        wdev = dev->ieee80211_ptr;

        if (!rdev->ops->set_power_mgmt)
                return -EOPNOTSUPP;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_POWER_SAVE);
        if (!hdr) {
                err = -ENOBUFS;
                goto free_msg;
        }

        if (wdev->ps)
                ps_state = NL80211_PS_ENABLED;
        else
                ps_state = NL80211_PS_DISABLED;

        if (nla_put_u32(msg, NL80211_ATTR_PS_STATE, ps_state))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

 nla_put_failure:
        err = -ENOBUFS;
 free_msg:
        nlmsg_free(msg);
        return err;
}

static const struct nla_policy
nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
        [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_BINARY },
        [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
        [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
        [NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
        [NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
        [NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
        [NL80211_ATTR_CQM_RSSI_LEVEL] = { .type = NLA_S32 },
};

static int nl80211_set_cqm_txe(struct genl_info *info,
                               u32 rate, u32 pkts, u32 intvl)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        if (rate > 100 || intvl > NL80211_CQM_TXE_MAX_INTVL)
                return -EINVAL;

        if (!rdev->ops->set_cqm_txe_config)
                return -EOPNOTSUPP;

        if (wdev->iftype != NL80211_IFTYPE_STATION &&
            wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        return rdev_set_cqm_txe_config(rdev, dev, rate, pkts, intvl);
}

static int cfg80211_cqm_rssi_update(struct cfg80211_registered_device *rdev,
                                    struct net_device *dev,
                                    struct cfg80211_cqm_config *cqm_config)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        s32 last, low, high;
        u32 hyst;
        int i, n, low_index;
        int err;

        /*
         * Obtain current RSSI value if possible, if not and no RSSI threshold
         * event has been received yet, we should receive an event after a
         * connection is established and enough beacons received to calculate
         * the average.
         */
        if (!cqm_config->last_rssi_event_value &&
            wdev->links[0].client.current_bss &&
            rdev->ops->get_station) {
                struct station_info sinfo = {};
                u8 *mac_addr;

                mac_addr = wdev->links[0].client.current_bss->pub.bssid;

                err = rdev_get_station(rdev, dev, mac_addr, &sinfo);
                if (err)
                        return err;

                cfg80211_sinfo_release_content(&sinfo);
                if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_BEACON_SIGNAL_AVG))
                        cqm_config->last_rssi_event_value =
                                (s8) sinfo.rx_beacon_signal_avg;
        }

        last = cqm_config->last_rssi_event_value;
        hyst = cqm_config->rssi_hyst;
        n = cqm_config->n_rssi_thresholds;

        for (i = 0; i < n; i++) {
                i = array_index_nospec(i, n);
                if (last < cqm_config->rssi_thresholds[i])
                        break;
        }

        low_index = i - 1;
        if (low_index >= 0) {
                low_index = array_index_nospec(low_index, n);
                low = cqm_config->rssi_thresholds[low_index] - hyst;
        } else {
                low = S32_MIN;
        }
        if (i < n) {
                i = array_index_nospec(i, n);
                high = cqm_config->rssi_thresholds[i] + hyst - 1;
        } else {
                high = S32_MAX;
        }

        return rdev_set_cqm_rssi_range_config(rdev, dev, low, high);
}

static int nl80211_set_cqm_rssi(struct genl_info *info,
                                const s32 *thresholds, int n_thresholds,
                                u32 hysteresis)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_cqm_config *cqm_config = NULL, *old;
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        s32 prev = S32_MIN;
        int i, err;

        /* Check all values negative and sorted */
        for (i = 0; i < n_thresholds; i++) {
                if (thresholds[i] > 0 || thresholds[i] <= prev)
                        return -EINVAL;

                prev = thresholds[i];
        }

        if (wdev->iftype != NL80211_IFTYPE_STATION &&
            wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        if (n_thresholds == 1 && thresholds[0] == 0) /* Disabling */
                n_thresholds = 0;

        old = wiphy_dereference(wdev->wiphy, wdev->cqm_config);

        /* if already disabled just succeed */
        if (!n_thresholds && !old)
                return 0;

        if (n_thresholds > 1) {
                if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                             NL80211_EXT_FEATURE_CQM_RSSI_LIST) ||
                    !rdev->ops->set_cqm_rssi_range_config)
                        return -EOPNOTSUPP;
        } else {
                if (!rdev->ops->set_cqm_rssi_config)
                        return -EOPNOTSUPP;
        }

        if (n_thresholds) {
                cqm_config = kzalloc(struct_size(cqm_config, rssi_thresholds,
                                                 n_thresholds),
                                     GFP_KERNEL);
                if (!cqm_config)
                        return -ENOMEM;

                cqm_config->rssi_hyst = hysteresis;
                cqm_config->n_rssi_thresholds = n_thresholds;
                memcpy(cqm_config->rssi_thresholds, thresholds,
                       flex_array_size(cqm_config, rssi_thresholds,
                                       n_thresholds));
                cqm_config->use_range_api = n_thresholds > 1 ||
                                            !rdev->ops->set_cqm_rssi_config;

                rcu_assign_pointer(wdev->cqm_config, cqm_config);

                if (cqm_config->use_range_api)
                        err = cfg80211_cqm_rssi_update(rdev, dev, cqm_config);
                else
                        err = rdev_set_cqm_rssi_config(rdev, dev,
                                                       thresholds[0],
                                                       hysteresis);
        } else {
                RCU_INIT_POINTER(wdev->cqm_config, NULL);
                /* if enabled as range also disable via range */
                if (old->use_range_api)
                        err = rdev_set_cqm_rssi_range_config(rdev, dev, 0, 0);
                else
                        err = rdev_set_cqm_rssi_config(rdev, dev, 0, 0);
        }

        if (err) {
                rcu_assign_pointer(wdev->cqm_config, old);
                kfree_rcu(cqm_config, rcu_head);
        } else {
                kfree_rcu(old, rcu_head);
        }

        return err;
}

static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
{
        struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
        struct nlattr *cqm;
        int err;

        cqm = info->attrs[NL80211_ATTR_CQM];
        if (!cqm)
                return -EINVAL;

        err = nla_parse_nested_deprecated(attrs, NL80211_ATTR_CQM_MAX, cqm,
                                          nl80211_attr_cqm_policy,
                                          info->extack);
        if (err)
                return err;

        if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
            attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
                const s32 *thresholds =
                        nla_data(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
                int len = nla_len(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
                u32 hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);

                if (len % 4)
                        return -EINVAL;

                return nl80211_set_cqm_rssi(info, thresholds, len / 4,
                                            hysteresis);
        }

        if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
            attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
            attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
                u32 rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
                u32 pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
                u32 intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);

                return nl80211_set_cqm_txe(info, rate, pkts, intvl);
        }

        return -EINVAL;
}

static int nl80211_join_ocb(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct ocb_setup setup = {};
        int err;

        err = nl80211_parse_chandef(rdev, info, &setup.chandef);
        if (err)
                return err;

        return cfg80211_join_ocb(rdev, dev, &setup);
}

static int nl80211_leave_ocb(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];

        return cfg80211_leave_ocb(rdev, dev);
}

static int nl80211_join_mesh(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct mesh_config cfg;
        struct mesh_setup setup;
        int err;

        /* start with default */
        memcpy(&cfg, &default_mesh_config, sizeof(cfg));
        memcpy(&setup, &default_mesh_setup, sizeof(setup));

        if (info->attrs[NL80211_ATTR_MESH_CONFIG]) {
                /* and parse parameters if given */
                err = nl80211_parse_mesh_config(info, &cfg, NULL);
                if (err)
                        return err;
        }

        if (!info->attrs[NL80211_ATTR_MESH_ID] ||
            !nla_len(info->attrs[NL80211_ATTR_MESH_ID]))
                return -EINVAL;

        setup.mesh_id = nla_data(info->attrs[NL80211_ATTR_MESH_ID]);
        setup.mesh_id_len = nla_len(info->attrs[NL80211_ATTR_MESH_ID]);

        if (info->attrs[NL80211_ATTR_MCAST_RATE] &&
            !nl80211_parse_mcast_rate(rdev, setup.mcast_rate,
                            nla_get_u32(info->attrs[NL80211_ATTR_MCAST_RATE])))
                        return -EINVAL;

        if (info->attrs[NL80211_ATTR_BEACON_INTERVAL]) {
                setup.beacon_interval =
                        nla_get_u32(info->attrs[NL80211_ATTR_BEACON_INTERVAL]);

                err = cfg80211_validate_beacon_int(rdev,
                                                   NL80211_IFTYPE_MESH_POINT,
                                                   setup.beacon_interval);
                if (err)
                        return err;
        }

        if (info->attrs[NL80211_ATTR_DTIM_PERIOD]) {
                setup.dtim_period =
                        nla_get_u32(info->attrs[NL80211_ATTR_DTIM_PERIOD]);
                if (setup.dtim_period < 1 || setup.dtim_period > 100)
                        return -EINVAL;
        }

        if (info->attrs[NL80211_ATTR_MESH_SETUP]) {
                /* parse additional setup parameters if given */
                err = nl80211_parse_mesh_setup(info, &setup);
                if (err)
                        return err;
        }

        if (setup.user_mpm)
                cfg.auto_open_plinks = false;

        if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
                err = nl80211_parse_chandef(rdev, info, &setup.chandef);
                if (err)
                        return err;
        } else {
                /* __cfg80211_join_mesh() will sort it out */
                setup.chandef.chan = NULL;
        }

        if (info->attrs[NL80211_ATTR_BSS_BASIC_RATES]) {
                u8 *rates = nla_data(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
                int n_rates =
                        nla_len(info->attrs[NL80211_ATTR_BSS_BASIC_RATES]);
                struct ieee80211_supported_band *sband;

                if (!setup.chandef.chan)
                        return -EINVAL;

                sband = rdev->wiphy.bands[setup.chandef.chan->band];

                err = ieee80211_get_ratemask(sband, rates, n_rates,
                                             &setup.basic_rates);
                if (err)
                        return err;
        }

        if (info->attrs[NL80211_ATTR_TX_RATES]) {
                err = nl80211_parse_tx_bitrate_mask(info, info->attrs,
                                                    NL80211_ATTR_TX_RATES,
                                                    &setup.beacon_rate,
                                                    dev, false, 0);
                if (err)
                        return err;

                if (!setup.chandef.chan)
                        return -EINVAL;

                err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band,
                                              &setup.beacon_rate);
                if (err)
                        return err;
        }

        setup.userspace_handles_dfs =
                nla_get_flag(info->attrs[NL80211_ATTR_HANDLE_DFS]);

        if (info->attrs[NL80211_ATTR_CONTROL_PORT_OVER_NL80211]) {
                int r = validate_pae_over_nl80211(rdev, info);

                if (r < 0)
                        return r;

                setup.control_port_over_nl80211 = true;
        }

        err = __cfg80211_join_mesh(rdev, dev, &setup, &cfg);
        if (!err && info->attrs[NL80211_ATTR_SOCKET_OWNER])
                dev->ieee80211_ptr->conn_owner_nlportid = info->snd_portid;

        return err;
}

static int nl80211_leave_mesh(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];

        return cfg80211_leave_mesh(rdev, dev);
}

#ifdef CONFIG_PM
static int nl80211_send_wowlan_patterns(struct sk_buff *msg,
                                        struct cfg80211_registered_device *rdev)
{
        struct cfg80211_wowlan *wowlan = rdev->wiphy.wowlan_config;
        struct nlattr *nl_pats, *nl_pat;
        int i, pat_len;

        if (!wowlan->n_patterns)
                return 0;

        nl_pats = nla_nest_start_noflag(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN);
        if (!nl_pats)
                return -ENOBUFS;

        for (i = 0; i < wowlan->n_patterns; i++) {
                nl_pat = nla_nest_start_noflag(msg, i + 1);
                if (!nl_pat)
                        return -ENOBUFS;
                pat_len = wowlan->patterns[i].pattern_len;
                if (nla_put(msg, NL80211_PKTPAT_MASK, DIV_ROUND_UP(pat_len, 8),
                            wowlan->patterns[i].mask) ||
                    nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
                            wowlan->patterns[i].pattern) ||
                    nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
                                wowlan->patterns[i].pkt_offset))
                        return -ENOBUFS;
                nla_nest_end(msg, nl_pat);
        }
        nla_nest_end(msg, nl_pats);

        return 0;
}

static int nl80211_send_wowlan_tcp(struct sk_buff *msg,
                                   struct cfg80211_wowlan_tcp *tcp)
{
        struct nlattr *nl_tcp;

        if (!tcp)
                return 0;

        nl_tcp = nla_nest_start_noflag(msg,
                                       NL80211_WOWLAN_TRIG_TCP_CONNECTION);
        if (!nl_tcp)
                return -ENOBUFS;

        if (nla_put_in_addr(msg, NL80211_WOWLAN_TCP_SRC_IPV4, tcp->src) ||
            nla_put_in_addr(msg, NL80211_WOWLAN_TCP_DST_IPV4, tcp->dst) ||
            nla_put(msg, NL80211_WOWLAN_TCP_DST_MAC, ETH_ALEN, tcp->dst_mac) ||
            nla_put_u16(msg, NL80211_WOWLAN_TCP_SRC_PORT, tcp->src_port) ||
            nla_put_u16(msg, NL80211_WOWLAN_TCP_DST_PORT, tcp->dst_port) ||
            nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD,
                    tcp->payload_len, tcp->payload) ||
            nla_put_u32(msg, NL80211_WOWLAN_TCP_DATA_INTERVAL,
                        tcp->data_interval) ||
            nla_put(msg, NL80211_WOWLAN_TCP_WAKE_PAYLOAD,
                    tcp->wake_len, tcp->wake_data) ||
            nla_put(msg, NL80211_WOWLAN_TCP_WAKE_MASK,
                    DIV_ROUND_UP(tcp->wake_len, 8), tcp->wake_mask))
                return -ENOBUFS;

        if (tcp->payload_seq.len &&
            nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ,
                    sizeof(tcp->payload_seq), &tcp->payload_seq))
                return -ENOBUFS;

        if (tcp->payload_tok.len &&
            nla_put(msg, NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN,
                    sizeof(tcp->payload_tok) + tcp->tokens_size,
                    &tcp->payload_tok))
                return -ENOBUFS;

        nla_nest_end(msg, nl_tcp);

        return 0;
}

static int nl80211_send_wowlan_nd(struct sk_buff *msg,
                                  struct cfg80211_sched_scan_request *req)
{
        struct nlattr *nd, *freqs, *matches, *match, *scan_plans, *scan_plan;
        int i;

        if (!req)
                return 0;

        nd = nla_nest_start_noflag(msg, NL80211_WOWLAN_TRIG_NET_DETECT);
        if (!nd)
                return -ENOBUFS;

        if (req->n_scan_plans == 1 &&
            nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_INTERVAL,
                        req->scan_plans[0].interval * 1000))
                return -ENOBUFS;

        if (nla_put_u32(msg, NL80211_ATTR_SCHED_SCAN_DELAY, req->delay))
                return -ENOBUFS;

        if (req->relative_rssi_set) {
                struct nl80211_bss_select_rssi_adjust rssi_adjust;

                if (nla_put_s8(msg, NL80211_ATTR_SCHED_SCAN_RELATIVE_RSSI,
                               req->relative_rssi))
                        return -ENOBUFS;

                rssi_adjust.band = req->rssi_adjust.band;
                rssi_adjust.delta = req->rssi_adjust.delta;
                if (nla_put(msg, NL80211_ATTR_SCHED_SCAN_RSSI_ADJUST,
                            sizeof(rssi_adjust), &rssi_adjust))
                        return -ENOBUFS;
        }

        freqs = nla_nest_start_noflag(msg, NL80211_ATTR_SCAN_FREQUENCIES);
        if (!freqs)
                return -ENOBUFS;

        for (i = 0; i < req->n_channels; i++) {
                if (nla_put_u32(msg, i, req->channels[i]->center_freq))
                        return -ENOBUFS;
        }

        nla_nest_end(msg, freqs);

        if (req->n_match_sets) {
                matches = nla_nest_start_noflag(msg,
                                                NL80211_ATTR_SCHED_SCAN_MATCH);
                if (!matches)
                        return -ENOBUFS;

                for (i = 0; i < req->n_match_sets; i++) {
                        match = nla_nest_start_noflag(msg, i);
                        if (!match)
                                return -ENOBUFS;

                        if (nla_put(msg, NL80211_SCHED_SCAN_MATCH_ATTR_SSID,
                                    req->match_sets[i].ssid.ssid_len,
                                    req->match_sets[i].ssid.ssid))
                                return -ENOBUFS;
                        nla_nest_end(msg, match);
                }
                nla_nest_end(msg, matches);
        }

        scan_plans = nla_nest_start_noflag(msg, NL80211_ATTR_SCHED_SCAN_PLANS);
        if (!scan_plans)
                return -ENOBUFS;

        for (i = 0; i < req->n_scan_plans; i++) {
                scan_plan = nla_nest_start_noflag(msg, i + 1);
                if (!scan_plan)
                        return -ENOBUFS;

                if (nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_INTERVAL,
                                req->scan_plans[i].interval) ||
                    (req->scan_plans[i].iterations &&
                     nla_put_u32(msg, NL80211_SCHED_SCAN_PLAN_ITERATIONS,
                                 req->scan_plans[i].iterations)))
                        return -ENOBUFS;
                nla_nest_end(msg, scan_plan);
        }
        nla_nest_end(msg, scan_plans);

        nla_nest_end(msg, nd);

        return 0;
}

static int nl80211_get_wowlan(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct sk_buff *msg;
        void *hdr;
        u32 size = NLMSG_DEFAULT_SIZE;

        if (!rdev->wiphy.wowlan)
                return -EOPNOTSUPP;

        if (rdev->wiphy.wowlan_config && rdev->wiphy.wowlan_config->tcp) {
                /* adjust size to have room for all the data */
                size += rdev->wiphy.wowlan_config->tcp->tokens_size +
                        rdev->wiphy.wowlan_config->tcp->payload_len +
                        rdev->wiphy.wowlan_config->tcp->wake_len +
                        rdev->wiphy.wowlan_config->tcp->wake_len / 8;
        }

        msg = nlmsg_new(size, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_WOWLAN);
        if (!hdr)
                goto nla_put_failure;

        if (rdev->wiphy.wowlan_config) {
                struct nlattr *nl_wowlan;

                nl_wowlan = nla_nest_start_noflag(msg,
                                                  NL80211_ATTR_WOWLAN_TRIGGERS);
                if (!nl_wowlan)
                        goto nla_put_failure;

                if ((rdev->wiphy.wowlan_config->any &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
                    (rdev->wiphy.wowlan_config->disconnect &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
                    (rdev->wiphy.wowlan_config->magic_pkt &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
                    (rdev->wiphy.wowlan_config->gtk_rekey_failure &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
                    (rdev->wiphy.wowlan_config->eap_identity_req &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
                    (rdev->wiphy.wowlan_config->four_way_handshake &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
                    (rdev->wiphy.wowlan_config->rfkill_release &&
                     nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE)))
                        goto nla_put_failure;

                if (nl80211_send_wowlan_patterns(msg, rdev))
                        goto nla_put_failure;

                if (nl80211_send_wowlan_tcp(msg,
                                            rdev->wiphy.wowlan_config->tcp))
                        goto nla_put_failure;

                if (nl80211_send_wowlan_nd(
                            msg,
                            rdev->wiphy.wowlan_config->nd_config))
                        goto nla_put_failure;

                nla_nest_end(msg, nl_wowlan);
        }

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}

static int nl80211_parse_wowlan_tcp(struct cfg80211_registered_device *rdev,
                                    struct nlattr *attr,
                                    struct cfg80211_wowlan *trig)
{
        struct nlattr *tb[NUM_NL80211_WOWLAN_TCP];
        struct cfg80211_wowlan_tcp *cfg;
        struct nl80211_wowlan_tcp_data_token *tok = NULL;
        struct nl80211_wowlan_tcp_data_seq *seq = NULL;
        u32 size;
        u32 data_size, wake_size, tokens_size = 0, wake_mask_size;
        int err, port;

        if (!rdev->wiphy.wowlan->tcp)
                return -EINVAL;

        err = nla_parse_nested_deprecated(tb, MAX_NL80211_WOWLAN_TCP, attr,
                                          nl80211_wowlan_tcp_policy, NULL);
        if (err)
                return err;

        if (!tb[NL80211_WOWLAN_TCP_SRC_IPV4] ||
            !tb[NL80211_WOWLAN_TCP_DST_IPV4] ||
            !tb[NL80211_WOWLAN_TCP_DST_MAC] ||
            !tb[NL80211_WOWLAN_TCP_DST_PORT] ||
            !tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD] ||
            !tb[NL80211_WOWLAN_TCP_DATA_INTERVAL] ||
            !tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD] ||
            !tb[NL80211_WOWLAN_TCP_WAKE_MASK])
                return -EINVAL;

        data_size = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]);
        if (data_size > rdev->wiphy.wowlan->tcp->data_payload_max)
                return -EINVAL;

        if (nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) >
                        rdev->wiphy.wowlan->tcp->data_interval_max ||
            nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]) == 0)
                return -EINVAL;

        wake_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]);
        if (wake_size > rdev->wiphy.wowlan->tcp->wake_payload_max)
                return -EINVAL;

        wake_mask_size = nla_len(tb[NL80211_WOWLAN_TCP_WAKE_MASK]);
        if (wake_mask_size != DIV_ROUND_UP(wake_size, 8))
                return -EINVAL;

        if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]) {
                u32 tokln = nla_len(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);

                tok = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_TOKEN]);
                tokens_size = tokln - sizeof(*tok);

                if (!tok->len || tokens_size % tok->len)
                        return -EINVAL;
                if (!rdev->wiphy.wowlan->tcp->tok)
                        return -EINVAL;
                if (tok->len > rdev->wiphy.wowlan->tcp->tok->max_len)
                        return -EINVAL;
                if (tok->len < rdev->wiphy.wowlan->tcp->tok->min_len)
                        return -EINVAL;
                if (tokens_size > rdev->wiphy.wowlan->tcp->tok->bufsize)
                        return -EINVAL;
                if (tok->offset + tok->len > data_size)
                        return -EINVAL;
        }

        if (tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]) {
                seq = nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD_SEQ]);
                if (!rdev->wiphy.wowlan->tcp->seq)
                        return -EINVAL;
                if (seq->len == 0 || seq->len > 4)
                        return -EINVAL;
                if (seq->len + seq->offset > data_size)
                        return -EINVAL;
        }

        size = sizeof(*cfg);
        size += data_size;
        size += wake_size + wake_mask_size;
        size += tokens_size;

        cfg = kzalloc(size, GFP_KERNEL);
        if (!cfg)
                return -ENOMEM;
        cfg->src = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_SRC_IPV4]);
        cfg->dst = nla_get_in_addr(tb[NL80211_WOWLAN_TCP_DST_IPV4]);
        memcpy(cfg->dst_mac, nla_data(tb[NL80211_WOWLAN_TCP_DST_MAC]),
               ETH_ALEN);
        if (tb[NL80211_WOWLAN_TCP_SRC_PORT])
                port = nla_get_u16(tb[NL80211_WOWLAN_TCP_SRC_PORT]);
        else
                port = 0;
#ifdef CONFIG_INET
        /* allocate a socket and port for it and use it */
        err = __sock_create(wiphy_net(&rdev->wiphy), PF_INET, SOCK_STREAM,
                            IPPROTO_TCP, &cfg->sock, 1);
        if (err) {
                kfree(cfg);
                return err;
        }
        if (inet_csk_get_port(cfg->sock->sk, port)) {
                sock_release(cfg->sock);
                kfree(cfg);
                return -EADDRINUSE;
        }
        cfg->src_port = inet_sk(cfg->sock->sk)->inet_num;
#else
        if (!port) {
                kfree(cfg);
                return -EINVAL;
        }
        cfg->src_port = port;
#endif

        cfg->dst_port = nla_get_u16(tb[NL80211_WOWLAN_TCP_DST_PORT]);
        cfg->payload_len = data_size;
        cfg->payload = (u8 *)cfg + sizeof(*cfg) + tokens_size;
        memcpy((void *)cfg->payload,
               nla_data(tb[NL80211_WOWLAN_TCP_DATA_PAYLOAD]),
               data_size);
        if (seq)
                cfg->payload_seq = *seq;
        cfg->data_interval = nla_get_u32(tb[NL80211_WOWLAN_TCP_DATA_INTERVAL]);
        cfg->wake_len = wake_size;
        cfg->wake_data = (u8 *)cfg + sizeof(*cfg) + tokens_size + data_size;
        memcpy((void *)cfg->wake_data,
               nla_data(tb[NL80211_WOWLAN_TCP_WAKE_PAYLOAD]),
               wake_size);
        cfg->wake_mask = (u8 *)cfg + sizeof(*cfg) + tokens_size +
                         data_size + wake_size;
        memcpy((void *)cfg->wake_mask,
               nla_data(tb[NL80211_WOWLAN_TCP_WAKE_MASK]),
               wake_mask_size);
        if (tok) {
                cfg->tokens_size = tokens_size;
                cfg->payload_tok = *tok;
                memcpy(cfg->payload_tok.token_stream, tok->token_stream,
                       tokens_size);
        }

        trig->tcp = cfg;

        return 0;
}

static int nl80211_parse_wowlan_nd(struct cfg80211_registered_device *rdev,
                                   const struct wiphy_wowlan_support *wowlan,
                                   struct nlattr *attr,
                                   struct cfg80211_wowlan *trig)
{
        struct nlattr **tb;
        int err;

        tb = kcalloc(NUM_NL80211_ATTR, sizeof(*tb), GFP_KERNEL);
        if (!tb)
                return -ENOMEM;

        if (!(wowlan->flags & WIPHY_WOWLAN_NET_DETECT)) {
                err = -EOPNOTSUPP;
                goto out;
        }

        err = nla_parse_nested_deprecated(tb, NL80211_ATTR_MAX, attr,
                                          nl80211_policy, NULL);
        if (err)
                goto out;

        trig->nd_config = nl80211_parse_sched_scan(&rdev->wiphy, NULL, tb,
                                                   wowlan->max_nd_match_sets);
        err = PTR_ERR_OR_ZERO(trig->nd_config);
        if (err)
                trig->nd_config = NULL;

out:
        kfree(tb);
        return err;
}

static int nl80211_set_wowlan(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct nlattr *tb[NUM_NL80211_WOWLAN_TRIG];
        struct cfg80211_wowlan new_triggers = {};
        struct cfg80211_wowlan *ntrig;
        const struct wiphy_wowlan_support *wowlan = rdev->wiphy.wowlan;
        int err, i;
        bool prev_enabled = rdev->wiphy.wowlan_config;
        bool regular = false;

        if (!wowlan)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS]) {
                cfg80211_rdev_free_wowlan(rdev);
                rdev->wiphy.wowlan_config = NULL;
                goto set_wakeup;
        }

        err = nla_parse_nested_deprecated(tb, MAX_NL80211_WOWLAN_TRIG,
                                          info->attrs[NL80211_ATTR_WOWLAN_TRIGGERS],
                                          nl80211_wowlan_policy, info->extack);
        if (err)
                return err;

        if (tb[NL80211_WOWLAN_TRIG_ANY]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_ANY))
                        return -EINVAL;
                new_triggers.any = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_DISCONNECT]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_DISCONNECT))
                        return -EINVAL;
                new_triggers.disconnect = true;
                regular = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_MAGIC_PKT]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_MAGIC_PKT))
                        return -EINVAL;
                new_triggers.magic_pkt = true;
                regular = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_SUPPORTED])
                return -EINVAL;

        if (tb[NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE))
                        return -EINVAL;
                new_triggers.gtk_rekey_failure = true;
                regular = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_EAP_IDENTITY_REQ))
                        return -EINVAL;
                new_triggers.eap_identity_req = true;
                regular = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_4WAY_HANDSHAKE))
                        return -EINVAL;
                new_triggers.four_way_handshake = true;
                regular = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_RFKILL_RELEASE]) {
                if (!(wowlan->flags & WIPHY_WOWLAN_RFKILL_RELEASE))
                        return -EINVAL;
                new_triggers.rfkill_release = true;
                regular = true;
        }

        if (tb[NL80211_WOWLAN_TRIG_PKT_PATTERN]) {
                struct nlattr *pat;
                int n_patterns = 0;
                int rem, pat_len, mask_len, pkt_offset;
                struct nlattr *pat_tb[NUM_NL80211_PKTPAT];

                regular = true;

                nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
                                    rem)
                        n_patterns++;
                if (n_patterns > wowlan->n_patterns)
                        return -EINVAL;

                new_triggers.patterns = kcalloc(n_patterns,
                                                sizeof(new_triggers.patterns[0]),
                                                GFP_KERNEL);
                if (!new_triggers.patterns)
                        return -ENOMEM;

                new_triggers.n_patterns = n_patterns;
                i = 0;

                nla_for_each_nested(pat, tb[NL80211_WOWLAN_TRIG_PKT_PATTERN],
                                    rem) {
                        u8 *mask_pat;

                        err = nla_parse_nested_deprecated(pat_tb,
                                                          MAX_NL80211_PKTPAT,
                                                          pat,
                                                          nl80211_packet_pattern_policy,
                                                          info->extack);
                        if (err)
                                goto error;

                        err = -EINVAL;
                        if (!pat_tb[NL80211_PKTPAT_MASK] ||
                            !pat_tb[NL80211_PKTPAT_PATTERN])
                                goto error;
                        pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
                        mask_len = DIV_ROUND_UP(pat_len, 8);
                        if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
                                goto error;
                        if (pat_len > wowlan->pattern_max_len ||
                            pat_len < wowlan->pattern_min_len)
                                goto error;

                        if (!pat_tb[NL80211_PKTPAT_OFFSET])
                                pkt_offset = 0;
                        else
                                pkt_offset = nla_get_u32(
                                        pat_tb[NL80211_PKTPAT_OFFSET]);
                        if (pkt_offset > wowlan->max_pkt_offset)
                                goto error;
                        new_triggers.patterns[i].pkt_offset = pkt_offset;

                        mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
                        if (!mask_pat) {
                                err = -ENOMEM;
                                goto error;
                        }
                        new_triggers.patterns[i].mask = mask_pat;
                        memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
                               mask_len);
                        mask_pat += mask_len;
                        new_triggers.patterns[i].pattern = mask_pat;
                        new_triggers.patterns[i].pattern_len = pat_len;
                        memcpy(mask_pat,
                               nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
                               pat_len);
                        i++;
                }
        }

        if (tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION]) {
                regular = true;
                err = nl80211_parse_wowlan_tcp(
                        rdev, tb[NL80211_WOWLAN_TRIG_TCP_CONNECTION],
                        &new_triggers);
                if (err)
                        goto error;
        }

        if (tb[NL80211_WOWLAN_TRIG_NET_DETECT]) {
                regular = true;
                err = nl80211_parse_wowlan_nd(
                        rdev, wowlan, tb[NL80211_WOWLAN_TRIG_NET_DETECT],
                        &new_triggers);
                if (err)
                        goto error;
        }

        /* The 'any' trigger means the device continues operating more or less
         * as in its normal operation mode and wakes up the host on most of the
         * normal interrupts (like packet RX, ...)
         * It therefore makes little sense to combine with the more constrained
         * wakeup trigger modes.
         */
        if (new_triggers.any && regular) {
                err = -EINVAL;
                goto error;
        }

        ntrig = kmemdup(&new_triggers, sizeof(new_triggers), GFP_KERNEL);
        if (!ntrig) {
                err = -ENOMEM;
                goto error;
        }
        cfg80211_rdev_free_wowlan(rdev);
        rdev->wiphy.wowlan_config = ntrig;

 set_wakeup:
        if (rdev->ops->set_wakeup &&
            prev_enabled != !!rdev->wiphy.wowlan_config)
                rdev_set_wakeup(rdev, rdev->wiphy.wowlan_config);

        return 0;
 error:
        for (i = 0; i < new_triggers.n_patterns; i++)
                kfree(new_triggers.patterns[i].mask);
        kfree(new_triggers.patterns);
        if (new_triggers.tcp && new_triggers.tcp->sock)
                sock_release(new_triggers.tcp->sock);
        kfree(new_triggers.tcp);
        kfree(new_triggers.nd_config);
        return err;
}
#endif

static int nl80211_send_coalesce_rules(struct sk_buff *msg,
                                       struct cfg80211_registered_device *rdev)
{
        struct nlattr *nl_pats, *nl_pat, *nl_rule, *nl_rules;
        int i, j, pat_len;
        struct cfg80211_coalesce_rules *rule;

        if (!rdev->coalesce->n_rules)
                return 0;

        nl_rules = nla_nest_start_noflag(msg, NL80211_ATTR_COALESCE_RULE);
        if (!nl_rules)
                return -ENOBUFS;

        for (i = 0; i < rdev->coalesce->n_rules; i++) {
                nl_rule = nla_nest_start_noflag(msg, i + 1);
                if (!nl_rule)
                        return -ENOBUFS;

                rule = &rdev->coalesce->rules[i];
                if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_DELAY,
                                rule->delay))
                        return -ENOBUFS;

                if (nla_put_u32(msg, NL80211_ATTR_COALESCE_RULE_CONDITION,
                                rule->condition))
                        return -ENOBUFS;

                nl_pats = nla_nest_start_noflag(msg,
                                                NL80211_ATTR_COALESCE_RULE_PKT_PATTERN);
                if (!nl_pats)
                        return -ENOBUFS;

                for (j = 0; j < rule->n_patterns; j++) {
                        nl_pat = nla_nest_start_noflag(msg, j + 1);
                        if (!nl_pat)
                                return -ENOBUFS;
                        pat_len = rule->patterns[j].pattern_len;
                        if (nla_put(msg, NL80211_PKTPAT_MASK,
                                    DIV_ROUND_UP(pat_len, 8),
                                    rule->patterns[j].mask) ||
                            nla_put(msg, NL80211_PKTPAT_PATTERN, pat_len,
                                    rule->patterns[j].pattern) ||
                            nla_put_u32(msg, NL80211_PKTPAT_OFFSET,
                                        rule->patterns[j].pkt_offset))
                                return -ENOBUFS;
                        nla_nest_end(msg, nl_pat);
                }
                nla_nest_end(msg, nl_pats);
                nla_nest_end(msg, nl_rule);
        }
        nla_nest_end(msg, nl_rules);

        return 0;
}

static int nl80211_get_coalesce(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct sk_buff *msg;
        void *hdr;

        if (!rdev->wiphy.coalesce)
                return -EOPNOTSUPP;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_COALESCE);
        if (!hdr)
                goto nla_put_failure;

        if (rdev->coalesce && nl80211_send_coalesce_rules(msg, rdev))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}

void cfg80211_free_coalesce(struct cfg80211_coalesce *coalesce)
{
        int i, j;
        struct cfg80211_coalesce_rules *rule;

        if (!coalesce)
                return;

        for (i = 0; i < coalesce->n_rules; i++) {
                rule = &coalesce->rules[i];
                if (!rule)
                        continue;
                for (j = 0; j < rule->n_patterns; j++)
                        kfree(rule->patterns[j].mask);
                kfree(rule->patterns);
        }
        kfree(coalesce);
}

static int nl80211_parse_coalesce_rule(struct cfg80211_registered_device *rdev,
                                       struct nlattr *rule,
                                       struct cfg80211_coalesce_rules *new_rule)
{
        int err, i;
        const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
        struct nlattr *tb[NUM_NL80211_ATTR_COALESCE_RULE], *pat;
        int rem, pat_len, mask_len, pkt_offset, n_patterns = 0;
        struct nlattr *pat_tb[NUM_NL80211_PKTPAT];

        err = nla_parse_nested_deprecated(tb, NL80211_ATTR_COALESCE_RULE_MAX,
                                          rule, nl80211_coalesce_policy, NULL);
        if (err)
                return err;

        if (tb[NL80211_ATTR_COALESCE_RULE_DELAY])
                new_rule->delay =
                        nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_DELAY]);
        if (new_rule->delay > coalesce->max_delay)
                return -EINVAL;

        if (tb[NL80211_ATTR_COALESCE_RULE_CONDITION])
                new_rule->condition =
                        nla_get_u32(tb[NL80211_ATTR_COALESCE_RULE_CONDITION]);

        if (!tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN])
                return -EINVAL;

        nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
                            rem)
                n_patterns++;
        if (n_patterns > coalesce->n_patterns)
                return -EINVAL;

        new_rule->patterns = kcalloc(n_patterns, sizeof(new_rule->patterns[0]),
                                     GFP_KERNEL);
        if (!new_rule->patterns)
                return -ENOMEM;

        new_rule->n_patterns = n_patterns;
        i = 0;

        nla_for_each_nested(pat, tb[NL80211_ATTR_COALESCE_RULE_PKT_PATTERN],
                            rem) {
                u8 *mask_pat;

                err = nla_parse_nested_deprecated(pat_tb, MAX_NL80211_PKTPAT,
                                                  pat,
                                                  nl80211_packet_pattern_policy,
                                                  NULL);
                if (err)
                        return err;

                if (!pat_tb[NL80211_PKTPAT_MASK] ||
                    !pat_tb[NL80211_PKTPAT_PATTERN])
                        return -EINVAL;
                pat_len = nla_len(pat_tb[NL80211_PKTPAT_PATTERN]);
                mask_len = DIV_ROUND_UP(pat_len, 8);
                if (nla_len(pat_tb[NL80211_PKTPAT_MASK]) != mask_len)
                        return -EINVAL;
                if (pat_len > coalesce->pattern_max_len ||
                    pat_len < coalesce->pattern_min_len)
                        return -EINVAL;

                if (!pat_tb[NL80211_PKTPAT_OFFSET])
                        pkt_offset = 0;
                else
                        pkt_offset = nla_get_u32(pat_tb[NL80211_PKTPAT_OFFSET]);
                if (pkt_offset > coalesce->max_pkt_offset)
                        return -EINVAL;
                new_rule->patterns[i].pkt_offset = pkt_offset;

                mask_pat = kmalloc(mask_len + pat_len, GFP_KERNEL);
                if (!mask_pat)
                        return -ENOMEM;

                new_rule->patterns[i].mask = mask_pat;
                memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_MASK]),
                       mask_len);

                mask_pat += mask_len;
                new_rule->patterns[i].pattern = mask_pat;
                new_rule->patterns[i].pattern_len = pat_len;
                memcpy(mask_pat, nla_data(pat_tb[NL80211_PKTPAT_PATTERN]),
                       pat_len);
                i++;
        }

        return 0;
}

static int nl80211_set_coalesce(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        const struct wiphy_coalesce_support *coalesce = rdev->wiphy.coalesce;
        struct cfg80211_coalesce *new_coalesce;
        int err, rem_rule, n_rules = 0, i;
        struct nlattr *rule;

        if (!rdev->wiphy.coalesce || !rdev->ops->set_coalesce)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_COALESCE_RULE]) {
                cfg80211_free_coalesce(rdev->coalesce);
                rdev->coalesce = NULL;
                rdev_set_coalesce(rdev, NULL);
                return 0;
        }

        nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
                            rem_rule)
                n_rules++;
        if (n_rules > coalesce->n_rules)
                return -EINVAL;

        new_coalesce = kzalloc(struct_size(new_coalesce, rules, n_rules),
                               GFP_KERNEL);
        if (!new_coalesce)
                return -ENOMEM;

        new_coalesce->n_rules = n_rules;
        i = 0;

        nla_for_each_nested(rule, info->attrs[NL80211_ATTR_COALESCE_RULE],
                            rem_rule) {
                err = nl80211_parse_coalesce_rule(rdev, rule,
                                                  &new_coalesce->rules[i]);
                if (err)
                        goto error;

                i++;
        }

        err = rdev_set_coalesce(rdev, new_coalesce);
        if (err)
                goto error;

        cfg80211_free_coalesce(rdev->coalesce);
        rdev->coalesce = new_coalesce;

        return 0;
error:
        cfg80211_free_coalesce(new_coalesce);

        return err;
}

static int nl80211_set_rekey_data(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct nlattr *tb[NUM_NL80211_REKEY_DATA];
        struct cfg80211_gtk_rekey_data rekey_data = {};
        int err;

        if (!info->attrs[NL80211_ATTR_REKEY_DATA])
                return -EINVAL;

        err = nla_parse_nested_deprecated(tb, MAX_NL80211_REKEY_DATA,
                                          info->attrs[NL80211_ATTR_REKEY_DATA],
                                          nl80211_rekey_policy, info->extack);
        if (err)
                return err;

        if (!tb[NL80211_REKEY_DATA_REPLAY_CTR] || !tb[NL80211_REKEY_DATA_KEK] ||
            !tb[NL80211_REKEY_DATA_KCK])
                return -EINVAL;
        if (nla_len(tb[NL80211_REKEY_DATA_KEK]) != NL80211_KEK_LEN &&
            !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK &&
              nla_len(tb[NL80211_REKEY_DATA_KEK]) == NL80211_KEK_EXT_LEN))
                return -ERANGE;
        if (nla_len(tb[NL80211_REKEY_DATA_KCK]) != NL80211_KCK_LEN &&
            !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK &&
              nla_len(tb[NL80211_REKEY_DATA_KCK]) == NL80211_KCK_EXT_LEN) &&
             !(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_EXT_KCK_32 &&
               nla_len(tb[NL80211_REKEY_DATA_KCK]) == NL80211_KCK_EXT_LEN_32))
                return -ERANGE;

        rekey_data.kek = nla_data(tb[NL80211_REKEY_DATA_KEK]);
        rekey_data.kck = nla_data(tb[NL80211_REKEY_DATA_KCK]);
        rekey_data.replay_ctr = nla_data(tb[NL80211_REKEY_DATA_REPLAY_CTR]);
        rekey_data.kek_len = nla_len(tb[NL80211_REKEY_DATA_KEK]);
        rekey_data.kck_len = nla_len(tb[NL80211_REKEY_DATA_KCK]);
        if (tb[NL80211_REKEY_DATA_AKM])
                rekey_data.akm = nla_get_u32(tb[NL80211_REKEY_DATA_AKM]);

        if (!wdev->connected)
                return -ENOTCONN;

        if (!rdev->ops->set_rekey_data)
                return -EOPNOTSUPP;

        return rdev_set_rekey_data(rdev, dev, &rekey_data);
}

static int nl80211_register_unexpected_frame(struct sk_buff *skb,
                                             struct genl_info *info)
{
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        if (wdev->iftype != NL80211_IFTYPE_AP &&
            wdev->iftype != NL80211_IFTYPE_P2P_GO)
                return -EINVAL;

        if (wdev->ap_unexpected_nlportid)
                return -EBUSY;

        wdev->ap_unexpected_nlportid = info->snd_portid;
        return 0;
}

static int nl80211_probe_client(struct sk_buff *skb,
                                struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct sk_buff *msg;
        void *hdr;
        const u8 *addr;
        u64 cookie;
        int err;

        if (wdev->iftype != NL80211_IFTYPE_AP &&
            wdev->iftype != NL80211_IFTYPE_P2P_GO)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!rdev->ops->probe_client)
                return -EOPNOTSUPP;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_PROBE_CLIENT);
        if (!hdr) {
                err = -ENOBUFS;
                goto free_msg;
        }

        addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        err = rdev_probe_client(rdev, dev, addr, &cookie);
        if (err)
                goto free_msg;

        if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        return genlmsg_reply(msg, info);

 nla_put_failure:
        err = -ENOBUFS;
 free_msg:
        nlmsg_free(msg);
        return err;
}

static int nl80211_register_beacons(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_beacon_registration *reg, *nreg;
        int rv;

        if (!(rdev->wiphy.flags & WIPHY_FLAG_REPORTS_OBSS))
                return -EOPNOTSUPP;

        nreg = kzalloc(sizeof(*nreg), GFP_KERNEL);
        if (!nreg)
                return -ENOMEM;

        /* First, check if already registered. */
        spin_lock_bh(&rdev->beacon_registrations_lock);
        list_for_each_entry(reg, &rdev->beacon_registrations, list) {
                if (reg->nlportid == info->snd_portid) {
                        rv = -EALREADY;
                        goto out_err;
                }
        }
        /* Add it to the list */
        nreg->nlportid = info->snd_portid;
        list_add(&nreg->list, &rdev->beacon_registrations);

        spin_unlock_bh(&rdev->beacon_registrations_lock);

        return 0;
out_err:
        spin_unlock_bh(&rdev->beacon_registrations_lock);
        kfree(nreg);
        return rv;
}

static int nl80211_start_p2p_device(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        int err;

        if (!rdev->ops->start_p2p_device)
                return -EOPNOTSUPP;

        if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
                return -EOPNOTSUPP;

        if (wdev_running(wdev))
                return 0;

        if (rfkill_blocked(rdev->wiphy.rfkill))
                return -ERFKILL;

        err = rdev_start_p2p_device(rdev, wdev);
        if (err)
                return err;

        wdev->is_running = true;
        rdev->opencount++;

        return 0;
}

static int nl80211_stop_p2p_device(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];

        if (wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)
                return -EOPNOTSUPP;

        if (!rdev->ops->stop_p2p_device)
                return -EOPNOTSUPP;

        cfg80211_stop_p2p_device(rdev, wdev);

        return 0;
}

static int nl80211_start_nan(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        struct cfg80211_nan_conf conf = {};
        int err;

        if (wdev->iftype != NL80211_IFTYPE_NAN)
                return -EOPNOTSUPP;

        if (wdev_running(wdev))
                return -EEXIST;

        if (rfkill_blocked(rdev->wiphy.rfkill))
                return -ERFKILL;

        if (!info->attrs[NL80211_ATTR_NAN_MASTER_PREF])
                return -EINVAL;

        conf.master_pref =
                nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);

        if (info->attrs[NL80211_ATTR_BANDS]) {
                u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);

                if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
                        return -EOPNOTSUPP;

                if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
                        return -EINVAL;

                conf.bands = bands;
        }

        err = rdev_start_nan(rdev, wdev, &conf);
        if (err)
                return err;

        wdev->is_running = true;
        rdev->opencount++;

        return 0;
}

static int nl80211_stop_nan(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];

        if (wdev->iftype != NL80211_IFTYPE_NAN)
                return -EOPNOTSUPP;

        cfg80211_stop_nan(rdev, wdev);

        return 0;
}

static int validate_nan_filter(struct nlattr *filter_attr)
{
        struct nlattr *attr;
        int len = 0, n_entries = 0, rem;

        nla_for_each_nested(attr, filter_attr, rem) {
                len += nla_len(attr);
                n_entries++;
        }

        if (len >= U8_MAX)
                return -EINVAL;

        return n_entries;
}

static int handle_nan_filter(struct nlattr *attr_filter,
                             struct cfg80211_nan_func *func,
                             bool tx)
{
        struct nlattr *attr;
        int n_entries, rem, i;
        struct cfg80211_nan_func_filter *filter;

        n_entries = validate_nan_filter(attr_filter);
        if (n_entries < 0)
                return n_entries;

        BUILD_BUG_ON(sizeof(*func->rx_filters) != sizeof(*func->tx_filters));

        filter = kcalloc(n_entries, sizeof(*func->rx_filters), GFP_KERNEL);
        if (!filter)
                return -ENOMEM;

        i = 0;
        nla_for_each_nested(attr, attr_filter, rem) {
                filter[i].filter = nla_memdup(attr, GFP_KERNEL);
                if (!filter[i].filter)
                        goto err;

                filter[i].len = nla_len(attr);
                i++;
        }
        if (tx) {
                func->num_tx_filters = n_entries;
                func->tx_filters = filter;
        } else {
                func->num_rx_filters = n_entries;
                func->rx_filters = filter;
        }

        return 0;

err:
        i = 0;
        nla_for_each_nested(attr, attr_filter, rem) {
                kfree(filter[i].filter);
                i++;
        }
        kfree(filter);
        return -ENOMEM;
}

static int nl80211_nan_add_func(struct sk_buff *skb,
                                struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        struct nlattr *tb[NUM_NL80211_NAN_FUNC_ATTR], *func_attr;
        struct cfg80211_nan_func *func;
        struct sk_buff *msg = NULL;
        void *hdr = NULL;
        int err = 0;

        if (wdev->iftype != NL80211_IFTYPE_NAN)
                return -EOPNOTSUPP;

        if (!wdev_running(wdev))
                return -ENOTCONN;

        if (!info->attrs[NL80211_ATTR_NAN_FUNC])
                return -EINVAL;

        err = nla_parse_nested_deprecated(tb, NL80211_NAN_FUNC_ATTR_MAX,
                                          info->attrs[NL80211_ATTR_NAN_FUNC],
                                          nl80211_nan_func_policy,
                                          info->extack);
        if (err)
                return err;

        func = kzalloc(sizeof(*func), GFP_KERNEL);
        if (!func)
                return -ENOMEM;

        func->cookie = cfg80211_assign_cookie(rdev);

        if (!tb[NL80211_NAN_FUNC_TYPE]) {
                err = -EINVAL;
                goto out;
        }


        func->type = nla_get_u8(tb[NL80211_NAN_FUNC_TYPE]);

        if (!tb[NL80211_NAN_FUNC_SERVICE_ID]) {
                err = -EINVAL;
                goto out;
        }

        memcpy(func->service_id, nla_data(tb[NL80211_NAN_FUNC_SERVICE_ID]),
               sizeof(func->service_id));

        func->close_range =
                nla_get_flag(tb[NL80211_NAN_FUNC_CLOSE_RANGE]);

        if (tb[NL80211_NAN_FUNC_SERVICE_INFO]) {
                func->serv_spec_info_len =
                        nla_len(tb[NL80211_NAN_FUNC_SERVICE_INFO]);
                func->serv_spec_info =
                        kmemdup(nla_data(tb[NL80211_NAN_FUNC_SERVICE_INFO]),
                                func->serv_spec_info_len,
                                GFP_KERNEL);
                if (!func->serv_spec_info) {
                        err = -ENOMEM;
                        goto out;
                }
        }

        if (tb[NL80211_NAN_FUNC_TTL])
                func->ttl = nla_get_u32(tb[NL80211_NAN_FUNC_TTL]);

        switch (func->type) {
        case NL80211_NAN_FUNC_PUBLISH:
                if (!tb[NL80211_NAN_FUNC_PUBLISH_TYPE]) {
                        err = -EINVAL;
                        goto out;
                }

                func->publish_type =
                        nla_get_u8(tb[NL80211_NAN_FUNC_PUBLISH_TYPE]);
                func->publish_bcast =
                        nla_get_flag(tb[NL80211_NAN_FUNC_PUBLISH_BCAST]);

                if ((!(func->publish_type & NL80211_NAN_SOLICITED_PUBLISH)) &&
                        func->publish_bcast) {
                        err = -EINVAL;
                        goto out;
                }
                break;
        case NL80211_NAN_FUNC_SUBSCRIBE:
                func->subscribe_active =
                        nla_get_flag(tb[NL80211_NAN_FUNC_SUBSCRIBE_ACTIVE]);
                break;
        case NL80211_NAN_FUNC_FOLLOW_UP:
                if (!tb[NL80211_NAN_FUNC_FOLLOW_UP_ID] ||
                    !tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID] ||
                    !tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]) {
                        err = -EINVAL;
                        goto out;
                }

                func->followup_id =
                        nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_ID]);
                func->followup_reqid =
                        nla_get_u8(tb[NL80211_NAN_FUNC_FOLLOW_UP_REQ_ID]);
                memcpy(func->followup_dest.addr,
                       nla_data(tb[NL80211_NAN_FUNC_FOLLOW_UP_DEST]),
                       sizeof(func->followup_dest.addr));
                if (func->ttl) {
                        err = -EINVAL;
                        goto out;
                }
                break;
        default:
                err = -EINVAL;
                goto out;
        }

        if (tb[NL80211_NAN_FUNC_SRF]) {
                struct nlattr *srf_tb[NUM_NL80211_NAN_SRF_ATTR];

                err = nla_parse_nested_deprecated(srf_tb,
                                                  NL80211_NAN_SRF_ATTR_MAX,
                                                  tb[NL80211_NAN_FUNC_SRF],
                                                  nl80211_nan_srf_policy,
                                                  info->extack);
                if (err)
                        goto out;

                func->srf_include =
                        nla_get_flag(srf_tb[NL80211_NAN_SRF_INCLUDE]);

                if (srf_tb[NL80211_NAN_SRF_BF]) {
                        if (srf_tb[NL80211_NAN_SRF_MAC_ADDRS] ||
                            !srf_tb[NL80211_NAN_SRF_BF_IDX]) {
                                err = -EINVAL;
                                goto out;
                        }

                        func->srf_bf_len =
                                nla_len(srf_tb[NL80211_NAN_SRF_BF]);
                        func->srf_bf =
                                kmemdup(nla_data(srf_tb[NL80211_NAN_SRF_BF]),
                                        func->srf_bf_len, GFP_KERNEL);
                        if (!func->srf_bf) {
                                err = -ENOMEM;
                                goto out;
                        }

                        func->srf_bf_idx =
                                nla_get_u8(srf_tb[NL80211_NAN_SRF_BF_IDX]);
                } else {
                        struct nlattr *attr, *mac_attr =
                                srf_tb[NL80211_NAN_SRF_MAC_ADDRS];
                        int n_entries, rem, i = 0;

                        if (!mac_attr) {
                                err = -EINVAL;
                                goto out;
                        }

                        n_entries = validate_acl_mac_addrs(mac_attr);
                        if (n_entries <= 0) {
                                err = -EINVAL;
                                goto out;
                        }

                        func->srf_num_macs = n_entries;
                        func->srf_macs =
                                kcalloc(n_entries, sizeof(*func->srf_macs),
                                        GFP_KERNEL);
                        if (!func->srf_macs) {
                                err = -ENOMEM;
                                goto out;
                        }

                        nla_for_each_nested(attr, mac_attr, rem)
                                memcpy(func->srf_macs[i++].addr, nla_data(attr),
                                       sizeof(*func->srf_macs));
                }
        }

        if (tb[NL80211_NAN_FUNC_TX_MATCH_FILTER]) {
                err = handle_nan_filter(tb[NL80211_NAN_FUNC_TX_MATCH_FILTER],
                                        func, true);
                if (err)
                        goto out;
        }

        if (tb[NL80211_NAN_FUNC_RX_MATCH_FILTER]) {
                err = handle_nan_filter(tb[NL80211_NAN_FUNC_RX_MATCH_FILTER],
                                        func, false);
                if (err)
                        goto out;
        }

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg) {
                err = -ENOMEM;
                goto out;
        }

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_ADD_NAN_FUNCTION);
        /* This can't really happen - we just allocated 4KB */
        if (WARN_ON(!hdr)) {
                err = -ENOMEM;
                goto out;
        }

        err = rdev_add_nan_func(rdev, wdev, func);
out:
        if (err < 0) {
                cfg80211_free_nan_func(func);
                nlmsg_free(msg);
                return err;
        }

        /* propagate the instance id and cookie to userspace  */
        if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, func->cookie,
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        func_attr = nla_nest_start_noflag(msg, NL80211_ATTR_NAN_FUNC);
        if (!func_attr)
                goto nla_put_failure;

        if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID,
                       func->instance_id))
                goto nla_put_failure;

        nla_nest_end(msg, func_attr);

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}

static int nl80211_nan_del_func(struct sk_buff *skb,
                               struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        u64 cookie;

        if (wdev->iftype != NL80211_IFTYPE_NAN)
                return -EOPNOTSUPP;

        if (!wdev_running(wdev))
                return -ENOTCONN;

        if (!info->attrs[NL80211_ATTR_COOKIE])
                return -EINVAL;

        cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);

        rdev_del_nan_func(rdev, wdev, cookie);

        return 0;
}

static int nl80211_nan_change_config(struct sk_buff *skb,
                                     struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        struct cfg80211_nan_conf conf = {};
        u32 changed = 0;

        if (wdev->iftype != NL80211_IFTYPE_NAN)
                return -EOPNOTSUPP;

        if (!wdev_running(wdev))
                return -ENOTCONN;

        if (info->attrs[NL80211_ATTR_NAN_MASTER_PREF]) {
                conf.master_pref =
                        nla_get_u8(info->attrs[NL80211_ATTR_NAN_MASTER_PREF]);
                if (conf.master_pref <= 1 || conf.master_pref == 255)
                        return -EINVAL;

                changed |= CFG80211_NAN_CONF_CHANGED_PREF;
        }

        if (info->attrs[NL80211_ATTR_BANDS]) {
                u32 bands = nla_get_u32(info->attrs[NL80211_ATTR_BANDS]);

                if (bands & ~(u32)wdev->wiphy->nan_supported_bands)
                        return -EOPNOTSUPP;

                if (bands && !(bands & BIT(NL80211_BAND_2GHZ)))
                        return -EINVAL;

                conf.bands = bands;
                changed |= CFG80211_NAN_CONF_CHANGED_BANDS;
        }

        if (!changed)
                return -EINVAL;

        return rdev_nan_change_conf(rdev, wdev, &conf, changed);
}

void cfg80211_nan_match(struct wireless_dev *wdev,
                        struct cfg80211_nan_match_params *match, gfp_t gfp)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct nlattr *match_attr, *local_func_attr, *peer_func_attr;
        struct sk_buff *msg;
        void *hdr;

        if (WARN_ON(!match->inst_id || !match->peer_inst_id || !match->addr))
                return;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NAN_MATCH);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                         wdev->netdev->ifindex)) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, match->cookie,
                              NL80211_ATTR_PAD) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, match->addr))
                goto nla_put_failure;

        match_attr = nla_nest_start_noflag(msg, NL80211_ATTR_NAN_MATCH);
        if (!match_attr)
                goto nla_put_failure;

        local_func_attr = nla_nest_start_noflag(msg,
                                                NL80211_NAN_MATCH_FUNC_LOCAL);
        if (!local_func_attr)
                goto nla_put_failure;

        if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->inst_id))
                goto nla_put_failure;

        nla_nest_end(msg, local_func_attr);

        peer_func_attr = nla_nest_start_noflag(msg,
                                               NL80211_NAN_MATCH_FUNC_PEER);
        if (!peer_func_attr)
                goto nla_put_failure;

        if (nla_put_u8(msg, NL80211_NAN_FUNC_TYPE, match->type) ||
            nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, match->peer_inst_id))
                goto nla_put_failure;

        if (match->info && match->info_len &&
            nla_put(msg, NL80211_NAN_FUNC_SERVICE_INFO, match->info_len,
                    match->info))
                goto nla_put_failure;

        nla_nest_end(msg, peer_func_attr);
        nla_nest_end(msg, match_attr);
        genlmsg_end(msg, hdr);

        if (!wdev->owner_nlportid)
                genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
                                        msg, 0, NL80211_MCGRP_NAN, gfp);
        else
                genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
                                wdev->owner_nlportid);

        return;

nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_nan_match);

void cfg80211_nan_func_terminated(struct wireless_dev *wdev,
                                  u8 inst_id,
                                  enum nl80211_nan_func_term_reason reason,
                                  u64 cookie, gfp_t gfp)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        struct nlattr *func_attr;
        void *hdr;

        if (WARN_ON(!inst_id))
                return;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_NAN_FUNCTION);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                         wdev->netdev->ifindex)) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        if (nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        func_attr = nla_nest_start_noflag(msg, NL80211_ATTR_NAN_FUNC);
        if (!func_attr)
                goto nla_put_failure;

        if (nla_put_u8(msg, NL80211_NAN_FUNC_INSTANCE_ID, inst_id) ||
            nla_put_u8(msg, NL80211_NAN_FUNC_TERM_REASON, reason))
                goto nla_put_failure;

        nla_nest_end(msg, func_attr);
        genlmsg_end(msg, hdr);

        if (!wdev->owner_nlportid)
                genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
                                        msg, 0, NL80211_MCGRP_NAN, gfp);
        else
                genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
                                wdev->owner_nlportid);

        return;

nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_nan_func_terminated);

static int nl80211_get_protocol_features(struct sk_buff *skb,
                                         struct genl_info *info)
{
        void *hdr;
        struct sk_buff *msg;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_PROTOCOL_FEATURES);
        if (!hdr)
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_PROTOCOL_FEATURES,
                        NL80211_PROTOCOL_FEATURE_SPLIT_WIPHY_DUMP))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

 nla_put_failure:
        kfree_skb(msg);
        return -ENOBUFS;
}

static int nl80211_update_ft_ies(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_update_ft_ies_params ft_params;
        struct net_device *dev = info->user_ptr[1];

        if (!rdev->ops->update_ft_ies)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MDID] ||
            !info->attrs[NL80211_ATTR_IE])
                return -EINVAL;

        memset(&ft_params, 0, sizeof(ft_params));
        ft_params.md = nla_get_u16(info->attrs[NL80211_ATTR_MDID]);
        ft_params.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
        ft_params.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);

        return rdev_update_ft_ies(rdev, dev, &ft_params);
}

static int nl80211_crit_protocol_start(struct sk_buff *skb,
                                       struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];
        enum nl80211_crit_proto_id proto = NL80211_CRIT_PROTO_UNSPEC;
        u16 duration;
        int ret;

        if (!rdev->ops->crit_proto_start)
                return -EOPNOTSUPP;

        if (WARN_ON(!rdev->ops->crit_proto_stop))
                return -EINVAL;

        if (rdev->crit_proto_nlportid)
                return -EBUSY;

        /* determine protocol if provided */
        if (info->attrs[NL80211_ATTR_CRIT_PROT_ID])
                proto = nla_get_u16(info->attrs[NL80211_ATTR_CRIT_PROT_ID]);

        if (proto >= NUM_NL80211_CRIT_PROTO)
                return -EINVAL;

        /* timeout must be provided */
        if (!info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION])
                return -EINVAL;

        duration =
                nla_get_u16(info->attrs[NL80211_ATTR_MAX_CRIT_PROT_DURATION]);

        ret = rdev_crit_proto_start(rdev, wdev, proto, duration);
        if (!ret)
                rdev->crit_proto_nlportid = info->snd_portid;

        return ret;
}

static int nl80211_crit_protocol_stop(struct sk_buff *skb,
                                      struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev = info->user_ptr[1];

        if (!rdev->ops->crit_proto_stop)
                return -EOPNOTSUPP;

        if (rdev->crit_proto_nlportid) {
                rdev->crit_proto_nlportid = 0;
                rdev_crit_proto_stop(rdev, wdev);
        }
        return 0;
}

static int nl80211_vendor_check_policy(const struct wiphy_vendor_command *vcmd,
                                       struct nlattr *attr,
                                       struct netlink_ext_ack *extack)
{
        if (vcmd->policy == VENDOR_CMD_RAW_DATA) {
                if (attr->nla_type & NLA_F_NESTED) {
                        NL_SET_ERR_MSG_ATTR(extack, attr,
                                            "unexpected nested data");
                        return -EINVAL;
                }

                return 0;
        }

        if (!(attr->nla_type & NLA_F_NESTED)) {
                NL_SET_ERR_MSG_ATTR(extack, attr, "expected nested data");
                return -EINVAL;
        }

        return nla_validate_nested(attr, vcmd->maxattr, vcmd->policy, extack);
}

static int nl80211_vendor_cmd(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct wireless_dev *wdev =
                __cfg80211_wdev_from_attrs(rdev, genl_info_net(info),
                                           info->attrs);
        int i, err;
        u32 vid, subcmd;

        if (!rdev->wiphy.vendor_commands)
                return -EOPNOTSUPP;

        if (IS_ERR(wdev)) {
                err = PTR_ERR(wdev);
                if (err != -EINVAL)
                        return err;
                wdev = NULL;
        } else if (wdev->wiphy != &rdev->wiphy) {
                return -EINVAL;
        }

        if (!info->attrs[NL80211_ATTR_VENDOR_ID] ||
            !info->attrs[NL80211_ATTR_VENDOR_SUBCMD])
                return -EINVAL;

        vid = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_ID]);
        subcmd = nla_get_u32(info->attrs[NL80211_ATTR_VENDOR_SUBCMD]);
        for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
                const struct wiphy_vendor_command *vcmd;
                void *data = NULL;
                int len = 0;

                vcmd = &rdev->wiphy.vendor_commands[i];

                if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
                        continue;

                if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
                                   WIPHY_VENDOR_CMD_NEED_NETDEV)) {
                        if (!wdev)
                                return -EINVAL;
                        if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
                            !wdev->netdev)
                                return -EINVAL;

                        if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
                                if (!wdev_running(wdev))
                                        return -ENETDOWN;
                        }
                } else {
                        wdev = NULL;
                }

                if (!vcmd->doit)
                        return -EOPNOTSUPP;

                if (info->attrs[NL80211_ATTR_VENDOR_DATA]) {
                        data = nla_data(info->attrs[NL80211_ATTR_VENDOR_DATA]);
                        len = nla_len(info->attrs[NL80211_ATTR_VENDOR_DATA]);

                        err = nl80211_vendor_check_policy(vcmd,
                                        info->attrs[NL80211_ATTR_VENDOR_DATA],
                                        info->extack);
                        if (err)
                                return err;
                }

                rdev->cur_cmd_info = info;
                err = vcmd->doit(&rdev->wiphy, wdev, data, len);
                rdev->cur_cmd_info = NULL;
                return err;
        }

        return -EOPNOTSUPP;
}

static int nl80211_prepare_vendor_dump(struct sk_buff *skb,
                                       struct netlink_callback *cb,
                                       struct cfg80211_registered_device **rdev,
                                       struct wireless_dev **wdev)
{
        struct nlattr **attrbuf;
        u32 vid, subcmd;
        unsigned int i;
        int vcmd_idx = -1;
        int err;
        void *data = NULL;
        unsigned int data_len = 0;

        if (cb->args[0]) {
                /* subtract the 1 again here */
                struct wiphy *wiphy = wiphy_idx_to_wiphy(cb->args[0] - 1);
                struct wireless_dev *tmp;

                if (!wiphy)
                        return -ENODEV;
                *rdev = wiphy_to_rdev(wiphy);
                *wdev = NULL;

                if (cb->args[1]) {
                        list_for_each_entry(tmp, &wiphy->wdev_list, list) {
                                if (tmp->identifier == cb->args[1] - 1) {
                                        *wdev = tmp;
                                        break;
                                }
                        }
                }

                /* keep rtnl locked in successful case */
                return 0;
        }

        attrbuf = kcalloc(NUM_NL80211_ATTR, sizeof(*attrbuf), GFP_KERNEL);
        if (!attrbuf)
                return -ENOMEM;

        err = nlmsg_parse_deprecated(cb->nlh,
                                     GENL_HDRLEN + nl80211_fam.hdrsize,
                                     attrbuf, nl80211_fam.maxattr,
                                     nl80211_policy, NULL);
        if (err)
                goto out;

        if (!attrbuf[NL80211_ATTR_VENDOR_ID] ||
            !attrbuf[NL80211_ATTR_VENDOR_SUBCMD]) {
                err = -EINVAL;
                goto out;
        }

        *wdev = __cfg80211_wdev_from_attrs(NULL, sock_net(skb->sk), attrbuf);
        if (IS_ERR(*wdev))
                *wdev = NULL;

        *rdev = __cfg80211_rdev_from_attrs(sock_net(skb->sk), attrbuf);
        if (IS_ERR(*rdev)) {
                err = PTR_ERR(*rdev);
                goto out;
        }

        vid = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_ID]);
        subcmd = nla_get_u32(attrbuf[NL80211_ATTR_VENDOR_SUBCMD]);

        for (i = 0; i < (*rdev)->wiphy.n_vendor_commands; i++) {
                const struct wiphy_vendor_command *vcmd;

                vcmd = &(*rdev)->wiphy.vendor_commands[i];

                if (vcmd->info.vendor_id != vid || vcmd->info.subcmd != subcmd)
                        continue;

                if (!vcmd->dumpit) {
                        err = -EOPNOTSUPP;
                        goto out;
                }

                vcmd_idx = i;
                break;
        }

        if (vcmd_idx < 0) {
                err = -EOPNOTSUPP;
                goto out;
        }

        if (attrbuf[NL80211_ATTR_VENDOR_DATA]) {
                data = nla_data(attrbuf[NL80211_ATTR_VENDOR_DATA]);
                data_len = nla_len(attrbuf[NL80211_ATTR_VENDOR_DATA]);

                err = nl80211_vendor_check_policy(
                                &(*rdev)->wiphy.vendor_commands[vcmd_idx],
                                attrbuf[NL80211_ATTR_VENDOR_DATA],
                                cb->extack);
                if (err)
                        goto out;
        }

        /* 0 is the first index - add 1 to parse only once */
        cb->args[0] = (*rdev)->wiphy_idx + 1;
        /* add 1 to know if it was NULL */
        cb->args[1] = *wdev ? (*wdev)->identifier + 1 : 0;
        cb->args[2] = vcmd_idx;
        cb->args[3] = (unsigned long)data;
        cb->args[4] = data_len;

        /* keep rtnl locked in successful case */
        err = 0;
out:
        kfree(attrbuf);
        return err;
}

static int nl80211_vendor_cmd_dump(struct sk_buff *skb,
                                   struct netlink_callback *cb)
{
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        unsigned int vcmd_idx;
        const struct wiphy_vendor_command *vcmd;
        void *data;
        int data_len;
        int err;
        struct nlattr *vendor_data;

        rtnl_lock();
        err = nl80211_prepare_vendor_dump(skb, cb, &rdev, &wdev);
        if (err)
                goto out;

        vcmd_idx = cb->args[2];
        data = (void *)cb->args[3];
        data_len = cb->args[4];
        vcmd = &rdev->wiphy.vendor_commands[vcmd_idx];

        if (vcmd->flags & (WIPHY_VENDOR_CMD_NEED_WDEV |
                           WIPHY_VENDOR_CMD_NEED_NETDEV)) {
                if (!wdev) {
                        err = -EINVAL;
                        goto out;
                }
                if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_NETDEV &&
                    !wdev->netdev) {
                        err = -EINVAL;
                        goto out;
                }

                if (vcmd->flags & WIPHY_VENDOR_CMD_NEED_RUNNING) {
                        if (!wdev_running(wdev)) {
                                err = -ENETDOWN;
                                goto out;
                        }
                }
        }

        while (1) {
                void *hdr = nl80211hdr_put(skb, NETLINK_CB(cb->skb).portid,
                                           cb->nlh->nlmsg_seq, NLM_F_MULTI,
                                           NL80211_CMD_VENDOR);
                if (!hdr)
                        break;

                if (nla_put_u32(skb, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
                    (wdev && nla_put_u64_64bit(skb, NL80211_ATTR_WDEV,
                                               wdev_id(wdev),
                                               NL80211_ATTR_PAD))) {
                        genlmsg_cancel(skb, hdr);
                        break;
                }

                vendor_data = nla_nest_start_noflag(skb,
                                                    NL80211_ATTR_VENDOR_DATA);
                if (!vendor_data) {
                        genlmsg_cancel(skb, hdr);
                        break;
                }

                err = vcmd->dumpit(&rdev->wiphy, wdev, skb, data, data_len,
                                   (unsigned long *)&cb->args[5]);
                nla_nest_end(skb, vendor_data);

                if (err == -ENOBUFS || err == -ENOENT) {
                        genlmsg_cancel(skb, hdr);
                        break;
                } else if (err <= 0) {
                        genlmsg_cancel(skb, hdr);
                        goto out;
                }

                genlmsg_end(skb, hdr);
        }

        err = skb->len;
 out:
        rtnl_unlock();
        return err;
}

struct sk_buff *__cfg80211_alloc_reply_skb(struct wiphy *wiphy,
                                           enum nl80211_commands cmd,
                                           enum nl80211_attrs attr,
                                           int approxlen)
{
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        if (WARN_ON(!rdev->cur_cmd_info))
                return NULL;

        return __cfg80211_alloc_vendor_skb(rdev, NULL, approxlen,
                                           rdev->cur_cmd_info->snd_portid,
                                           rdev->cur_cmd_info->snd_seq,
                                           cmd, attr, NULL, GFP_KERNEL);
}
EXPORT_SYMBOL(__cfg80211_alloc_reply_skb);

int cfg80211_vendor_cmd_reply(struct sk_buff *skb)
{
        struct cfg80211_registered_device *rdev = ((void **)skb->cb)[0];
        void *hdr = ((void **)skb->cb)[1];
        struct nlattr *data = ((void **)skb->cb)[2];

        /* clear CB data for netlink core to own from now on */
        memset(skb->cb, 0, sizeof(skb->cb));

        if (WARN_ON(!rdev->cur_cmd_info)) {
                kfree_skb(skb);
                return -EINVAL;
        }

        nla_nest_end(skb, data);
        genlmsg_end(skb, hdr);
        return genlmsg_reply(skb, rdev->cur_cmd_info);
}
EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_reply);

unsigned int cfg80211_vendor_cmd_get_sender(struct wiphy *wiphy)
{
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        if (WARN_ON(!rdev->cur_cmd_info))
                return 0;

        return rdev->cur_cmd_info->snd_portid;
}
EXPORT_SYMBOL_GPL(cfg80211_vendor_cmd_get_sender);

static int nl80211_set_qos_map(struct sk_buff *skb,
                               struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_qos_map *qos_map = NULL;
        struct net_device *dev = info->user_ptr[1];
        u8 *pos, len, num_des, des_len, des;
        int ret;

        if (!rdev->ops->set_qos_map)
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_QOS_MAP]) {
                pos = nla_data(info->attrs[NL80211_ATTR_QOS_MAP]);
                len = nla_len(info->attrs[NL80211_ATTR_QOS_MAP]);

                if (len % 2)
                        return -EINVAL;

                qos_map = kzalloc(sizeof(struct cfg80211_qos_map), GFP_KERNEL);
                if (!qos_map)
                        return -ENOMEM;

                num_des = (len - IEEE80211_QOS_MAP_LEN_MIN) >> 1;
                if (num_des) {
                        des_len = num_des *
                                sizeof(struct cfg80211_dscp_exception);
                        memcpy(qos_map->dscp_exception, pos, des_len);
                        qos_map->num_des = num_des;
                        for (des = 0; des < num_des; des++) {
                                if (qos_map->dscp_exception[des].up > 7) {
                                        kfree(qos_map);
                                        return -EINVAL;
                                }
                        }
                        pos += des_len;
                }
                memcpy(qos_map->up, pos, IEEE80211_QOS_MAP_LEN_MIN);
        }

        ret = nl80211_key_allowed(dev->ieee80211_ptr);
        if (!ret)
                ret = rdev_set_qos_map(rdev, dev, qos_map);

        kfree(qos_map);
        return ret;
}

static int nl80211_add_tx_ts(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        const u8 *peer;
        u8 tsid, up;
        u16 admitted_time = 0;

        if (!(rdev->wiphy.features & NL80211_FEATURE_SUPPORTS_WMM_ADMISSION))
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC] ||
            !info->attrs[NL80211_ATTR_USER_PRIO])
                return -EINVAL;

        tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
        up = nla_get_u8(info->attrs[NL80211_ATTR_USER_PRIO]);

        /* WMM uses TIDs 0-7 even for TSPEC */
        if (tsid >= IEEE80211_FIRST_TSPEC_TSID) {
                /* TODO: handle 802.11 TSPEC/admission control
                 * need more attributes for that (e.g. BA session requirement);
                 * change the WMM adminssion test above to allow both then
                 */
                return -EINVAL;
        }

        peer = nla_data(info->attrs[NL80211_ATTR_MAC]);

        if (info->attrs[NL80211_ATTR_ADMITTED_TIME]) {
                admitted_time =
                        nla_get_u16(info->attrs[NL80211_ATTR_ADMITTED_TIME]);
                if (!admitted_time)
                        return -EINVAL;
        }

        switch (wdev->iftype) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                if (wdev->connected)
                        break;
                return -ENOTCONN;
        default:
                return -EOPNOTSUPP;
        }

        return rdev_add_tx_ts(rdev, dev, tsid, peer, up, admitted_time);
}

static int nl80211_del_tx_ts(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        const u8 *peer;
        u8 tsid;

        if (!info->attrs[NL80211_ATTR_TSID] || !info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        tsid = nla_get_u8(info->attrs[NL80211_ATTR_TSID]);
        peer = nla_data(info->attrs[NL80211_ATTR_MAC]);

        return rdev_del_tx_ts(rdev, dev, tsid, peer);
}

static int nl80211_tdls_channel_switch(struct sk_buff *skb,
                                       struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_chan_def chandef = {};
        const u8 *addr;
        u8 oper_class;
        int err;

        if (!rdev->ops->tdls_channel_switch ||
            !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
                return -EOPNOTSUPP;

        switch (dev->ieee80211_ptr->iftype) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                break;
        default:
                return -EOPNOTSUPP;
        }

        if (!info->attrs[NL80211_ATTR_MAC] ||
            !info->attrs[NL80211_ATTR_OPER_CLASS])
                return -EINVAL;

        err = nl80211_parse_chandef(rdev, info, &chandef);
        if (err)
                return err;

        /*
         * Don't allow wide channels on the 2.4Ghz band, as per IEEE802.11-2012
         * section 10.22.6.2.1. Disallow 5/10Mhz channels as well for now, the
         * specification is not defined for them.
         */
        if (chandef.chan->band == NL80211_BAND_2GHZ &&
            chandef.width != NL80211_CHAN_WIDTH_20_NOHT &&
            chandef.width != NL80211_CHAN_WIDTH_20)
                return -EINVAL;

        /* we will be active on the TDLS link */
        if (!cfg80211_reg_can_beacon_relax(&rdev->wiphy, &chandef,
                                           wdev->iftype))
                return -EINVAL;

        /* don't allow switching to DFS channels */
        if (cfg80211_chandef_dfs_required(wdev->wiphy, &chandef, wdev->iftype))
                return -EINVAL;

        addr = nla_data(info->attrs[NL80211_ATTR_MAC]);
        oper_class = nla_get_u8(info->attrs[NL80211_ATTR_OPER_CLASS]);

        return rdev_tdls_channel_switch(rdev, dev, addr, oper_class, &chandef);
}

static int nl80211_tdls_cancel_channel_switch(struct sk_buff *skb,
                                              struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        const u8 *addr;

        if (!rdev->ops->tdls_channel_switch ||
            !rdev->ops->tdls_cancel_channel_switch ||
            !(rdev->wiphy.features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH))
                return -EOPNOTSUPP;

        switch (dev->ieee80211_ptr->iftype) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                break;
        default:
                return -EOPNOTSUPP;
        }

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        addr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        rdev_tdls_cancel_channel_switch(rdev, dev, addr);

        return 0;
}

static int nl80211_set_multicast_to_unicast(struct sk_buff *skb,
                                            struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        const struct nlattr *nla;
        bool enabled;

        if (!rdev->ops->set_multicast_to_unicast)
                return -EOPNOTSUPP;

        if (wdev->iftype != NL80211_IFTYPE_AP &&
            wdev->iftype != NL80211_IFTYPE_P2P_GO)
                return -EOPNOTSUPP;

        nla = info->attrs[NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED];
        enabled = nla_get_flag(nla);

        return rdev_set_multicast_to_unicast(rdev, dev, enabled);
}

static int nl80211_set_pmk(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_pmk_conf pmk_conf = {};

        if (wdev->iftype != NL80211_IFTYPE_STATION &&
            wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MAC] || !info->attrs[NL80211_ATTR_PMK])
                return -EINVAL;

        if (!wdev->connected)
                return -ENOTCONN;

        pmk_conf.aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
        if (memcmp(pmk_conf.aa, wdev->u.client.connected_addr, ETH_ALEN))
                return -EINVAL;

        pmk_conf.pmk = nla_data(info->attrs[NL80211_ATTR_PMK]);
        pmk_conf.pmk_len = nla_len(info->attrs[NL80211_ATTR_PMK]);
        if (pmk_conf.pmk_len != WLAN_PMK_LEN &&
            pmk_conf.pmk_len != WLAN_PMK_LEN_SUITE_B_192)
                return -EINVAL;

        if (info->attrs[NL80211_ATTR_PMKR0_NAME])
                pmk_conf.pmk_r0_name =
                        nla_data(info->attrs[NL80211_ATTR_PMKR0_NAME]);

        return rdev_set_pmk(rdev, dev, &pmk_conf);
}

static int nl80211_del_pmk(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        const u8 *aa;

        if (wdev->iftype != NL80211_IFTYPE_STATION &&
            wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X))
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        aa = nla_data(info->attrs[NL80211_ATTR_MAC]);
        return rdev_del_pmk(rdev, dev, aa);
}

static int nl80211_external_auth(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_external_auth_params params;

        if (!rdev->ops->external_auth)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_SSID] &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP &&
            dev->ieee80211_ptr->iftype != NL80211_IFTYPE_P2P_GO)
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_BSSID])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_STATUS_CODE])
                return -EINVAL;

        memset(&params, 0, sizeof(params));

        if (info->attrs[NL80211_ATTR_SSID]) {
                params.ssid.ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);
                if (params.ssid.ssid_len == 0)
                        return -EINVAL;
                memcpy(params.ssid.ssid,
                       nla_data(info->attrs[NL80211_ATTR_SSID]),
                       params.ssid.ssid_len);
        }

        memcpy(params.bssid, nla_data(info->attrs[NL80211_ATTR_BSSID]),
               ETH_ALEN);

        params.status = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);

        if (info->attrs[NL80211_ATTR_PMKID])
                params.pmkid = nla_data(info->attrs[NL80211_ATTR_PMKID]);

        return rdev_external_auth(rdev, dev, &params);
}

static int nl80211_tx_control_port(struct sk_buff *skb, struct genl_info *info)
{
        bool dont_wait_for_ack = info->attrs[NL80211_ATTR_DONT_WAIT_FOR_ACK];
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        const u8 *buf;
        size_t len;
        u8 *dest;
        u16 proto;
        bool noencrypt;
        u64 cookie = 0;
        int link_id;
        int err;

        if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211))
                return -EOPNOTSUPP;

        if (!rdev->ops->tx_control_port)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_FRAME] ||
            !info->attrs[NL80211_ATTR_MAC] ||
            !info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]) {
                GENL_SET_ERR_MSG(info, "Frame, MAC or ethertype missing");
                return -EINVAL;
        }

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
        case NL80211_IFTYPE_MESH_POINT:
                break;
        case NL80211_IFTYPE_ADHOC:
                if (wdev->u.ibss.current_bss)
                        break;
                return -ENOTCONN;
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                if (wdev->connected)
                        break;
                return -ENOTCONN;
        default:
                return -EOPNOTSUPP;
        }

        buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
        len = nla_len(info->attrs[NL80211_ATTR_FRAME]);
        dest = nla_data(info->attrs[NL80211_ATTR_MAC]);
        proto = nla_get_u16(info->attrs[NL80211_ATTR_CONTROL_PORT_ETHERTYPE]);
        noencrypt =
                nla_get_flag(info->attrs[NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT]);

        link_id = nl80211_link_id_or_invalid(info->attrs);

        err = rdev_tx_control_port(rdev, dev, buf, len,
                                   dest, cpu_to_be16(proto), noencrypt, link_id,
                                   dont_wait_for_ack ? NULL : &cookie);
        if (!err && !dont_wait_for_ack)
                nl_set_extack_cookie_u64(info->extack, cookie);
        return err;
}

static int nl80211_get_ftm_responder_stats(struct sk_buff *skb,
                                           struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_ftm_responder_stats ftm_stats = {};
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct sk_buff *msg;
        void *hdr;
        struct nlattr *ftm_stats_attr;
        int err;

        if (wdev->iftype != NL80211_IFTYPE_AP ||
            !wdev->links[link_id].ap.beacon_interval)
                return -EOPNOTSUPP;

        err = rdev_get_ftm_responder_stats(rdev, dev, &ftm_stats);
        if (err)
                return err;

        if (!ftm_stats.filled)
                return -ENODATA;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, info->snd_portid, info->snd_seq, 0,
                             NL80211_CMD_GET_FTM_RESPONDER_STATS);
        if (!hdr)
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
                goto nla_put_failure;

        ftm_stats_attr = nla_nest_start_noflag(msg,
                                               NL80211_ATTR_FTM_RESPONDER_STATS);
        if (!ftm_stats_attr)
                goto nla_put_failure;

#define SET_FTM(field, name, type)                                         \
        do { if ((ftm_stats.filled & BIT(NL80211_FTM_STATS_ ## name)) && \
            nla_put_ ## type(msg, NL80211_FTM_STATS_ ## name,                 \
                             ftm_stats.field))                                 \
                goto nla_put_failure; } while (0)
#define SET_FTM_U64(field, name)                                         \
        do { if ((ftm_stats.filled & BIT(NL80211_FTM_STATS_ ## name)) && \
            nla_put_u64_64bit(msg, NL80211_FTM_STATS_ ## name,                 \
                              ftm_stats.field, NL80211_FTM_STATS_PAD))         \
                goto nla_put_failure; } while (0)

        SET_FTM(success_num, SUCCESS_NUM, u32);
        SET_FTM(partial_num, PARTIAL_NUM, u32);
        SET_FTM(failed_num, FAILED_NUM, u32);
        SET_FTM(asap_num, ASAP_NUM, u32);
        SET_FTM(non_asap_num, NON_ASAP_NUM, u32);
        SET_FTM_U64(total_duration_ms, TOTAL_DURATION_MSEC);
        SET_FTM(unknown_triggers_num, UNKNOWN_TRIGGERS_NUM, u32);
        SET_FTM(reschedule_requests_num, RESCHEDULE_REQUESTS_NUM, u32);
        SET_FTM(out_of_window_triggers_num, OUT_OF_WINDOW_TRIGGERS_NUM, u32);
#undef SET_FTM

        nla_nest_end(msg, ftm_stats_attr);

        genlmsg_end(msg, hdr);
        return genlmsg_reply(msg, info);

nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}

static int nl80211_update_owe_info(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_update_owe_info owe_info;
        struct net_device *dev = info->user_ptr[1];

        if (!rdev->ops->update_owe_info)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_STATUS_CODE] ||
            !info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        memset(&owe_info, 0, sizeof(owe_info));
        owe_info.status = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);
        nla_memcpy(owe_info.peer, info->attrs[NL80211_ATTR_MAC], ETH_ALEN);

        if (info->attrs[NL80211_ATTR_IE]) {
                owe_info.ie = nla_data(info->attrs[NL80211_ATTR_IE]);
                owe_info.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);
        }

        return rdev_update_owe_info(rdev, dev, &owe_info);
}

static int nl80211_probe_mesh_link(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct station_info sinfo = {};
        const u8 *buf;
        size_t len;
        u8 *dest;
        int err;

        if (!rdev->ops->probe_mesh_link || !rdev->ops->get_station)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MAC] ||
            !info->attrs[NL80211_ATTR_FRAME]) {
                GENL_SET_ERR_MSG(info, "Frame or MAC missing");
                return -EINVAL;
        }

        if (wdev->iftype != NL80211_IFTYPE_MESH_POINT)
                return -EOPNOTSUPP;

        dest = nla_data(info->attrs[NL80211_ATTR_MAC]);
        buf = nla_data(info->attrs[NL80211_ATTR_FRAME]);
        len = nla_len(info->attrs[NL80211_ATTR_FRAME]);

        if (len < sizeof(struct ethhdr))
                return -EINVAL;

        if (!ether_addr_equal(buf, dest) || is_multicast_ether_addr(buf) ||
            !ether_addr_equal(buf + ETH_ALEN, dev->dev_addr))
                return -EINVAL;

        err = rdev_get_station(rdev, dev, dest, &sinfo);
        if (err)
                return err;

        cfg80211_sinfo_release_content(&sinfo);

        return rdev_probe_mesh_link(rdev, dev, dest, buf, len);
}

static int parse_tid_conf(struct cfg80211_registered_device *rdev,
                          struct nlattr *attrs[], struct net_device *dev,
                          struct cfg80211_tid_cfg *tid_conf,
                          struct genl_info *info, const u8 *peer,
                          unsigned int link_id)
{
        struct netlink_ext_ack *extack = info->extack;
        u64 mask;
        int err;

        if (!attrs[NL80211_TID_CONFIG_ATTR_TIDS])
                return -EINVAL;

        tid_conf->config_override =
                        nla_get_flag(attrs[NL80211_TID_CONFIG_ATTR_OVERRIDE]);
        tid_conf->tids = nla_get_u16(attrs[NL80211_TID_CONFIG_ATTR_TIDS]);

        if (tid_conf->config_override) {
                if (rdev->ops->reset_tid_config) {
                        err = rdev_reset_tid_config(rdev, dev, peer,
                                                    tid_conf->tids);
                        if (err)
                                return err;
                } else {
                        return -EINVAL;
                }
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_NOACK]) {
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_NOACK);
                tid_conf->noack =
                        nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_NOACK]);
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_RETRY_SHORT]) {
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_RETRY_SHORT);
                tid_conf->retry_short =
                        nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_RETRY_SHORT]);

                if (tid_conf->retry_short > rdev->wiphy.max_data_retry_count)
                        return -EINVAL;
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_RETRY_LONG]) {
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_RETRY_LONG);
                tid_conf->retry_long =
                        nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_RETRY_LONG]);

                if (tid_conf->retry_long > rdev->wiphy.max_data_retry_count)
                        return -EINVAL;
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_AMPDU_CTRL]) {
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_AMPDU_CTRL);
                tid_conf->ampdu =
                        nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_AMPDU_CTRL]);
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL]) {
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL);
                tid_conf->rtscts =
                        nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_RTSCTS_CTRL]);
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_AMSDU_CTRL]) {
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_AMSDU_CTRL);
                tid_conf->amsdu =
                        nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_AMSDU_CTRL]);
        }

        if (attrs[NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE]) {
                u32 idx = NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE, attr;

                tid_conf->txrate_type = nla_get_u8(attrs[idx]);

                if (tid_conf->txrate_type != NL80211_TX_RATE_AUTOMATIC) {
                        attr = NL80211_TID_CONFIG_ATTR_TX_RATE;
                        err = nl80211_parse_tx_bitrate_mask(info, attrs, attr,
                                                    &tid_conf->txrate_mask, dev,
                                                    true, link_id);
                        if (err)
                                return err;

                        tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_TX_RATE);
                }
                tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_TX_RATE_TYPE);
        }

        if (peer)
                mask = rdev->wiphy.tid_config_support.peer;
        else
                mask = rdev->wiphy.tid_config_support.vif;

        if (tid_conf->mask & ~mask) {
                NL_SET_ERR_MSG(extack, "unsupported TID configuration");
                return -EOPNOTSUPP;
        }

        return 0;
}

static int nl80211_set_tid_config(struct sk_buff *skb,
                                  struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct nlattr *attrs[NL80211_TID_CONFIG_ATTR_MAX + 1];
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_tid_config *tid_config;
        struct nlattr *tid;
        int conf_idx = 0, rem_conf;
        int ret = -EINVAL;
        u32 num_conf = 0;

        if (!info->attrs[NL80211_ATTR_TID_CONFIG])
                return -EINVAL;

        if (!rdev->ops->set_tid_config)
                return -EOPNOTSUPP;

        nla_for_each_nested(tid, info->attrs[NL80211_ATTR_TID_CONFIG],
                            rem_conf)
                num_conf++;

        tid_config = kzalloc(struct_size(tid_config, tid_conf, num_conf),
                             GFP_KERNEL);
        if (!tid_config)
                return -ENOMEM;

        tid_config->n_tid_conf = num_conf;

        if (info->attrs[NL80211_ATTR_MAC])
                tid_config->peer = nla_data(info->attrs[NL80211_ATTR_MAC]);

        nla_for_each_nested(tid, info->attrs[NL80211_ATTR_TID_CONFIG],
                            rem_conf) {
                ret = nla_parse_nested(attrs, NL80211_TID_CONFIG_ATTR_MAX,
                                       tid, NULL, NULL);

                if (ret)
                        goto bad_tid_conf;

                ret = parse_tid_conf(rdev, attrs, dev,
                                     &tid_config->tid_conf[conf_idx],
                                     info, tid_config->peer, link_id);
                if (ret)
                        goto bad_tid_conf;

                conf_idx++;
        }

        ret = rdev_set_tid_config(rdev, dev, tid_config);

bad_tid_conf:
        kfree(tid_config);
        return ret;
}

static int nl80211_color_change(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct cfg80211_color_change_settings params = {};
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct nlattr **tb;
        u16 offset;
        int err;

        if (!rdev->ops->color_change)
                return -EOPNOTSUPP;

        if (!wiphy_ext_feature_isset(&rdev->wiphy,
                                     NL80211_EXT_FEATURE_BSS_COLOR))
                return -EOPNOTSUPP;

        if (wdev->iftype != NL80211_IFTYPE_AP)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_COLOR_CHANGE_COUNT] ||
            !info->attrs[NL80211_ATTR_COLOR_CHANGE_COLOR] ||
            !info->attrs[NL80211_ATTR_COLOR_CHANGE_ELEMS])
                return -EINVAL;

        params.count = nla_get_u8(info->attrs[NL80211_ATTR_COLOR_CHANGE_COUNT]);
        params.color = nla_get_u8(info->attrs[NL80211_ATTR_COLOR_CHANGE_COLOR]);

        err = nl80211_parse_beacon(rdev, info->attrs, &params.beacon_next,
                                   info->extack);
        if (err)
                return err;

        tb = kcalloc(NL80211_ATTR_MAX + 1, sizeof(*tb), GFP_KERNEL);
        if (!tb)
                return -ENOMEM;

        err = nla_parse_nested(tb, NL80211_ATTR_MAX,
                               info->attrs[NL80211_ATTR_COLOR_CHANGE_ELEMS],
                               nl80211_policy, info->extack);
        if (err)
                goto out;

        err = nl80211_parse_beacon(rdev, tb, &params.beacon_color_change,
                                   info->extack);
        if (err)
                goto out;

        if (!tb[NL80211_ATTR_CNTDWN_OFFS_BEACON]) {
                err = -EINVAL;
                goto out;
        }

        if (nla_len(tb[NL80211_ATTR_CNTDWN_OFFS_BEACON]) != sizeof(u16)) {
                err = -EINVAL;
                goto out;
        }

        offset = nla_get_u16(tb[NL80211_ATTR_CNTDWN_OFFS_BEACON]);
        if (offset >= params.beacon_color_change.tail_len) {
                err = -EINVAL;
                goto out;
        }

        if (params.beacon_color_change.tail[offset] != params.count) {
                err = -EINVAL;
                goto out;
        }

        params.counter_offset_beacon = offset;

        if (tb[NL80211_ATTR_CNTDWN_OFFS_PRESP]) {
                if (nla_len(tb[NL80211_ATTR_CNTDWN_OFFS_PRESP]) !=
                    sizeof(u16)) {
                        err = -EINVAL;
                        goto out;
                }

                offset = nla_get_u16(tb[NL80211_ATTR_CNTDWN_OFFS_PRESP]);
                if (offset >= params.beacon_color_change.probe_resp_len) {
                        err = -EINVAL;
                        goto out;
                }

                if (params.beacon_color_change.probe_resp[offset] !=
                    params.count) {
                        err = -EINVAL;
                        goto out;
                }

                params.counter_offset_presp = offset;
        }

        params.link_id = nl80211_link_id(info->attrs);
        err = rdev_color_change(rdev, dev, &params);

out:
        kfree(params.beacon_next.mbssid_ies);
        kfree(params.beacon_color_change.mbssid_ies);
        kfree(params.beacon_next.rnr_ies);
        kfree(params.beacon_color_change.rnr_ies);
        kfree(tb);
        return err;
}

static int nl80211_set_fils_aad(struct sk_buff *skb,
                                struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_fils_aad fils_aad = {};
        u8 *nonces;

        if (!info->attrs[NL80211_ATTR_MAC] ||
            !info->attrs[NL80211_ATTR_FILS_KEK] ||
            !info->attrs[NL80211_ATTR_FILS_NONCES])
                return -EINVAL;

        fils_aad.macaddr = nla_data(info->attrs[NL80211_ATTR_MAC]);
        fils_aad.kek_len = nla_len(info->attrs[NL80211_ATTR_FILS_KEK]);
        fils_aad.kek = nla_data(info->attrs[NL80211_ATTR_FILS_KEK]);
        nonces = nla_data(info->attrs[NL80211_ATTR_FILS_NONCES]);
        fils_aad.snonce = nonces;
        fils_aad.anonce = nonces + FILS_NONCE_LEN;

        return rdev_set_fils_aad(rdev, dev, &fils_aad);
}

static int nl80211_add_link(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        int ret;

        if (!(wdev->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
                return -EINVAL;

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
                break;
        default:
                return -EINVAL;
        }

        if (!info->attrs[NL80211_ATTR_MAC] ||
            !is_valid_ether_addr(nla_data(info->attrs[NL80211_ATTR_MAC])))
                return -EINVAL;

        wdev->valid_links |= BIT(link_id);
        ether_addr_copy(wdev->links[link_id].addr,
                        nla_data(info->attrs[NL80211_ATTR_MAC]));

        ret = rdev_add_intf_link(rdev, wdev, link_id);
        if (ret) {
                wdev->valid_links &= ~BIT(link_id);
                eth_zero_addr(wdev->links[link_id].addr);
        }

        return ret;
}

static int nl80211_remove_link(struct sk_buff *skb, struct genl_info *info)
{
        unsigned int link_id = nl80211_link_id(info->attrs);
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        /* cannot remove if there's no link */
        if (!info->attrs[NL80211_ATTR_MLO_LINK_ID])
                return -EINVAL;

        switch (wdev->iftype) {
        case NL80211_IFTYPE_AP:
                break;
        default:
                return -EINVAL;
        }

        cfg80211_remove_link(wdev, link_id);

        return 0;
}

static int
nl80211_add_mod_link_station(struct sk_buff *skb, struct genl_info *info,
                             bool add)
{
        struct link_station_parameters params = {};
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        int err;

        if ((add && !rdev->ops->add_link_station) ||
            (!add && !rdev->ops->mod_link_station))
                return -EOPNOTSUPP;

        if (add && !info->attrs[NL80211_ATTR_MAC])
                return -EINVAL;

        if (!info->attrs[NL80211_ATTR_MLD_ADDR])
                return -EINVAL;

        if (add && !info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES])
                return -EINVAL;

        params.mld_mac = nla_data(info->attrs[NL80211_ATTR_MLD_ADDR]);

        if (info->attrs[NL80211_ATTR_MAC]) {
                params.link_mac = nla_data(info->attrs[NL80211_ATTR_MAC]);
                if (!is_valid_ether_addr(params.link_mac))
                        return -EINVAL;
        }

        if (!info->attrs[NL80211_ATTR_MLO_LINK_ID])
                return -EINVAL;

        params.link_id = nla_get_u8(info->attrs[NL80211_ATTR_MLO_LINK_ID]);

        if (info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]) {
                params.supported_rates =
                        nla_data(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
                params.supported_rates_len =
                        nla_len(info->attrs[NL80211_ATTR_STA_SUPPORTED_RATES]);
        }

        if (info->attrs[NL80211_ATTR_HT_CAPABILITY])
                params.ht_capa =
                        nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_VHT_CAPABILITY])
                params.vht_capa =
                        nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_HE_CAPABILITY]) {
                params.he_capa =
                        nla_data(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
                params.he_capa_len =
                        nla_len(info->attrs[NL80211_ATTR_HE_CAPABILITY]);

                if (info->attrs[NL80211_ATTR_EHT_CAPABILITY]) {
                        params.eht_capa =
                                nla_data(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);
                        params.eht_capa_len =
                                nla_len(info->attrs[NL80211_ATTR_EHT_CAPABILITY]);

                        if (!ieee80211_eht_capa_size_ok((const u8 *)params.he_capa,
                                                        (const u8 *)params.eht_capa,
                                                        params.eht_capa_len,
                                                        false))
                                return -EINVAL;
                }
        }

        if (info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY])
                params.he_6ghz_capa =
                        nla_data(info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY]);

        if (info->attrs[NL80211_ATTR_OPMODE_NOTIF]) {
                params.opmode_notif_used = true;
                params.opmode_notif =
                        nla_get_u8(info->attrs[NL80211_ATTR_OPMODE_NOTIF]);
        }

        err = nl80211_parse_sta_txpower_setting(info, &params.txpwr,
                                                &params.txpwr_set);
        if (err)
                return err;

        if (add)
                return rdev_add_link_station(rdev, dev, &params);

        return rdev_mod_link_station(rdev, dev, &params);
}

static int
nl80211_add_link_station(struct sk_buff *skb, struct genl_info *info)
{
        return nl80211_add_mod_link_station(skb, info, true);
}

static int
nl80211_modify_link_station(struct sk_buff *skb, struct genl_info *info)
{
        return nl80211_add_mod_link_station(skb, info, false);
}

static int
nl80211_remove_link_station(struct sk_buff *skb, struct genl_info *info)
{
        struct link_station_del_parameters params = {};
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];

        if (!rdev->ops->del_link_station)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MLD_ADDR] ||
            !info->attrs[NL80211_ATTR_MLO_LINK_ID])
                return -EINVAL;

        params.mld_mac = nla_data(info->attrs[NL80211_ATTR_MLD_ADDR]);
        params.link_id = nla_get_u8(info->attrs[NL80211_ATTR_MLO_LINK_ID]);

        return rdev_del_link_station(rdev, dev, &params);
}

static int nl80211_set_hw_timestamp(struct sk_buff *skb,
                                    struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct cfg80211_set_hw_timestamp hwts = {};

        if (!rdev->wiphy.hw_timestamp_max_peers)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_MAC] &&
            rdev->wiphy.hw_timestamp_max_peers != CFG80211_HW_TIMESTAMP_ALL_PEERS)
                return -EOPNOTSUPP;

        if (info->attrs[NL80211_ATTR_MAC])
                hwts.macaddr = nla_data(info->attrs[NL80211_ATTR_MAC]);

        hwts.enable =
                nla_get_flag(info->attrs[NL80211_ATTR_HW_TIMESTAMP_ENABLED]);

        return rdev_set_hw_timestamp(rdev, dev, &hwts);
}

static int
nl80211_set_ttlm(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_ttlm_params params = {};
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct net_device *dev = info->user_ptr[1];
        struct wireless_dev *wdev = dev->ieee80211_ptr;

        if (wdev->iftype != NL80211_IFTYPE_STATION &&
            wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
                return -EOPNOTSUPP;

        if (!wdev->connected)
                return -ENOLINK;

        if (!info->attrs[NL80211_ATTR_MLO_TTLM_DLINK] ||
            !info->attrs[NL80211_ATTR_MLO_TTLM_ULINK])
                return -EINVAL;

        nla_memcpy(params.dlink,
                   info->attrs[NL80211_ATTR_MLO_TTLM_DLINK],
                   sizeof(params.dlink));
        nla_memcpy(params.ulink,
                   info->attrs[NL80211_ATTR_MLO_TTLM_ULINK],
                   sizeof(params.ulink));

        return rdev_set_ttlm(rdev, dev, &params);
}

#define NL80211_FLAG_NEED_WIPHY                0x01
#define NL80211_FLAG_NEED_NETDEV        0x02
#define NL80211_FLAG_NEED_RTNL                0x04
#define NL80211_FLAG_CHECK_NETDEV_UP        0x08
#define NL80211_FLAG_NEED_NETDEV_UP        (NL80211_FLAG_NEED_NETDEV |\
                                         NL80211_FLAG_CHECK_NETDEV_UP)
#define NL80211_FLAG_NEED_WDEV                0x10
/* If a netdev is associated, it must be UP, P2P must be started */
#define NL80211_FLAG_NEED_WDEV_UP        (NL80211_FLAG_NEED_WDEV |\
                                         NL80211_FLAG_CHECK_NETDEV_UP)
#define NL80211_FLAG_CLEAR_SKB                0x20
#define NL80211_FLAG_NO_WIPHY_MTX        0x40
#define NL80211_FLAG_MLO_VALID_LINK_ID        0x80
#define NL80211_FLAG_MLO_UNSUPPORTED        0x100

#define INTERNAL_FLAG_SELECTORS(__sel)                        \
        SELECTOR(__sel, NONE, 0) /* must be first */        \
        SELECTOR(__sel, WIPHY,                                \
                 NL80211_FLAG_NEED_WIPHY)                \
        SELECTOR(__sel, WDEV,                                \
                 NL80211_FLAG_NEED_WDEV)                \
        SELECTOR(__sel, NETDEV,                                \
                 NL80211_FLAG_NEED_NETDEV)                \
        SELECTOR(__sel, NETDEV_LINK,                        \
                 NL80211_FLAG_NEED_NETDEV |                \
                 NL80211_FLAG_MLO_VALID_LINK_ID)        \
        SELECTOR(__sel, NETDEV_NO_MLO,                        \
                 NL80211_FLAG_NEED_NETDEV |                \
                 NL80211_FLAG_MLO_UNSUPPORTED)        \
        SELECTOR(__sel, WIPHY_RTNL,                        \
                 NL80211_FLAG_NEED_WIPHY |                \
                 NL80211_FLAG_NEED_RTNL)                \
        SELECTOR(__sel, WIPHY_RTNL_NOMTX,                \
                 NL80211_FLAG_NEED_WIPHY |                \
                 NL80211_FLAG_NEED_RTNL |                \
                 NL80211_FLAG_NO_WIPHY_MTX)                \
        SELECTOR(__sel, WDEV_RTNL,                        \
                 NL80211_FLAG_NEED_WDEV |                \
                 NL80211_FLAG_NEED_RTNL)                \
        SELECTOR(__sel, NETDEV_RTNL,                        \
                 NL80211_FLAG_NEED_NETDEV |                \
                 NL80211_FLAG_NEED_RTNL)                \
        SELECTOR(__sel, NETDEV_UP,                        \
                 NL80211_FLAG_NEED_NETDEV_UP)                \
        SELECTOR(__sel, NETDEV_UP_LINK,                        \
                 NL80211_FLAG_NEED_NETDEV_UP |                \
                 NL80211_FLAG_MLO_VALID_LINK_ID)        \
        SELECTOR(__sel, NETDEV_UP_NO_MLO,                \
                 NL80211_FLAG_NEED_NETDEV_UP |                \
                 NL80211_FLAG_MLO_UNSUPPORTED)                \
        SELECTOR(__sel, NETDEV_UP_NO_MLO_CLEAR,                \
                 NL80211_FLAG_NEED_NETDEV_UP |                \
                 NL80211_FLAG_CLEAR_SKB |                \
                 NL80211_FLAG_MLO_UNSUPPORTED)                \
        SELECTOR(__sel, NETDEV_UP_NOTMX,                \
                 NL80211_FLAG_NEED_NETDEV_UP |                \
                 NL80211_FLAG_NO_WIPHY_MTX)                \
        SELECTOR(__sel, NETDEV_UP_NOTMX_NOMLO,                \
                 NL80211_FLAG_NEED_NETDEV_UP |                \
                 NL80211_FLAG_NO_WIPHY_MTX |                \
                 NL80211_FLAG_MLO_UNSUPPORTED)                \
        SELECTOR(__sel, NETDEV_UP_CLEAR,                \
                 NL80211_FLAG_NEED_NETDEV_UP |                \
                 NL80211_FLAG_CLEAR_SKB)                \
        SELECTOR(__sel, WDEV_UP,                        \
                 NL80211_FLAG_NEED_WDEV_UP)                \
        SELECTOR(__sel, WDEV_UP_LINK,                        \
                 NL80211_FLAG_NEED_WDEV_UP |                \
                 NL80211_FLAG_MLO_VALID_LINK_ID)        \
        SELECTOR(__sel, WDEV_UP_RTNL,                        \
                 NL80211_FLAG_NEED_WDEV_UP |                \
                 NL80211_FLAG_NEED_RTNL)                \
        SELECTOR(__sel, WIPHY_CLEAR,                        \
                 NL80211_FLAG_NEED_WIPHY |                \
                 NL80211_FLAG_CLEAR_SKB)

enum nl80211_internal_flags_selector {
#define SELECTOR(_, name, value)        NL80211_IFL_SEL_##name,
        INTERNAL_FLAG_SELECTORS(_)
#undef SELECTOR
};

static u32 nl80211_internal_flags[] = {
#define SELECTOR(_, name, value)        [NL80211_IFL_SEL_##name] = value,
        INTERNAL_FLAG_SELECTORS(_)
#undef SELECTOR
};

static int nl80211_pre_doit(const struct genl_split_ops *ops,
                            struct sk_buff *skb,
                            struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = NULL;
        struct wireless_dev *wdev = NULL;
        struct net_device *dev = NULL;
        u32 internal_flags;
        int err;

        if (WARN_ON(ops->internal_flags >= ARRAY_SIZE(nl80211_internal_flags)))
                return -EINVAL;

        internal_flags = nl80211_internal_flags[ops->internal_flags];

        rtnl_lock();
        if (internal_flags & NL80211_FLAG_NEED_WIPHY) {
                rdev = cfg80211_get_dev_from_info(genl_info_net(info), info);
                if (IS_ERR(rdev)) {
                        err = PTR_ERR(rdev);
                        goto out_unlock;
                }
                info->user_ptr[0] = rdev;
        } else if (internal_flags & NL80211_FLAG_NEED_NETDEV ||
                   internal_flags & NL80211_FLAG_NEED_WDEV) {
                wdev = __cfg80211_wdev_from_attrs(NULL, genl_info_net(info),
                                                  info->attrs);
                if (IS_ERR(wdev)) {
                        err = PTR_ERR(wdev);
                        goto out_unlock;
                }

                dev = wdev->netdev;
                dev_hold(dev);
                rdev = wiphy_to_rdev(wdev->wiphy);

                if (internal_flags & NL80211_FLAG_NEED_NETDEV) {
                        if (!dev) {
                                err = -EINVAL;
                                goto out_unlock;
                        }

                        info->user_ptr[1] = dev;
                } else {
                        info->user_ptr[1] = wdev;
                }

                if (internal_flags & NL80211_FLAG_CHECK_NETDEV_UP &&
                    !wdev_running(wdev)) {
                        err = -ENETDOWN;
                        goto out_unlock;
                }

                info->user_ptr[0] = rdev;
        }

        if (internal_flags & NL80211_FLAG_MLO_VALID_LINK_ID) {
                struct nlattr *link_id = info->attrs[NL80211_ATTR_MLO_LINK_ID];

                if (!wdev) {
                        err = -EINVAL;
                        goto out_unlock;
                }

                /* MLO -> require valid link ID */
                if (wdev->valid_links &&
                    (!link_id ||
                     !(wdev->valid_links & BIT(nla_get_u8(link_id))))) {
                        err = -EINVAL;
                        goto out_unlock;
                }

                /* non-MLO -> no link ID attribute accepted */
                if (!wdev->valid_links && link_id) {
                        err = -EINVAL;
                        goto out_unlock;
                }
        }

        if (internal_flags & NL80211_FLAG_MLO_UNSUPPORTED) {
                if (info->attrs[NL80211_ATTR_MLO_LINK_ID] ||
                    (wdev && wdev->valid_links)) {
                        err = -EINVAL;
                        goto out_unlock;
                }
        }

        if (rdev && !(internal_flags & NL80211_FLAG_NO_WIPHY_MTX)) {
                wiphy_lock(&rdev->wiphy);
                /* we keep the mutex locked until post_doit */
                __release(&rdev->wiphy.mtx);
        }
        if (!(internal_flags & NL80211_FLAG_NEED_RTNL))
                rtnl_unlock();

        return 0;
out_unlock:
        rtnl_unlock();
        dev_put(dev);
        return err;
}

static void nl80211_post_doit(const struct genl_split_ops *ops,
                              struct sk_buff *skb,
                              struct genl_info *info)
{
        u32 internal_flags = nl80211_internal_flags[ops->internal_flags];

        if (info->user_ptr[1]) {
                if (internal_flags & NL80211_FLAG_NEED_WDEV) {
                        struct wireless_dev *wdev = info->user_ptr[1];

                        dev_put(wdev->netdev);
                } else {
                        dev_put(info->user_ptr[1]);
                }
        }

        if (info->user_ptr[0] &&
            !(internal_flags & NL80211_FLAG_NO_WIPHY_MTX)) {
                struct cfg80211_registered_device *rdev = info->user_ptr[0];

                /* we kept the mutex locked since pre_doit */
                __acquire(&rdev->wiphy.mtx);
                wiphy_unlock(&rdev->wiphy);
        }

        if (internal_flags & NL80211_FLAG_NEED_RTNL)
                rtnl_unlock();

        /* If needed, clear the netlink message payload from the SKB
         * as it might contain key data that shouldn't stick around on
         * the heap after the SKB is freed. The netlink message header
         * is still needed for further processing, so leave it intact.
         */
        if (internal_flags & NL80211_FLAG_CLEAR_SKB) {
                struct nlmsghdr *nlh = nlmsg_hdr(skb);

                memset(nlmsg_data(nlh), 0, nlmsg_len(nlh));
        }
}

static int nl80211_set_sar_sub_specs(struct cfg80211_registered_device *rdev,
                                     struct cfg80211_sar_specs *sar_specs,
                                     struct nlattr *spec[], int index)
{
        u32 range_index, i;

        if (!sar_specs || !spec)
                return -EINVAL;

        if (!spec[NL80211_SAR_ATTR_SPECS_POWER] ||
            !spec[NL80211_SAR_ATTR_SPECS_RANGE_INDEX])
                return -EINVAL;

        range_index = nla_get_u32(spec[NL80211_SAR_ATTR_SPECS_RANGE_INDEX]);

        /* check if range_index exceeds num_freq_ranges */
        if (range_index >= rdev->wiphy.sar_capa->num_freq_ranges)
                return -EINVAL;

        /* check if range_index duplicates */
        for (i = 0; i < index; i++) {
                if (sar_specs->sub_specs[i].freq_range_index == range_index)
                        return -EINVAL;
        }

        sar_specs->sub_specs[index].power =
                nla_get_s32(spec[NL80211_SAR_ATTR_SPECS_POWER]);

        sar_specs->sub_specs[index].freq_range_index = range_index;

        return 0;
}

static int nl80211_set_sar_specs(struct sk_buff *skb, struct genl_info *info)
{
        struct cfg80211_registered_device *rdev = info->user_ptr[0];
        struct nlattr *spec[NL80211_SAR_ATTR_SPECS_MAX + 1];
        struct nlattr *tb[NL80211_SAR_ATTR_MAX + 1];
        struct cfg80211_sar_specs *sar_spec;
        enum nl80211_sar_type type;
        struct nlattr *spec_list;
        u32 specs;
        int rem, err;

        if (!rdev->wiphy.sar_capa || !rdev->ops->set_sar_specs)
                return -EOPNOTSUPP;

        if (!info->attrs[NL80211_ATTR_SAR_SPEC])
                return -EINVAL;

        nla_parse_nested(tb, NL80211_SAR_ATTR_MAX,
                         info->attrs[NL80211_ATTR_SAR_SPEC],
                         NULL, NULL);

        if (!tb[NL80211_SAR_ATTR_TYPE] || !tb[NL80211_SAR_ATTR_SPECS])
                return -EINVAL;

        type = nla_get_u32(tb[NL80211_SAR_ATTR_TYPE]);
        if (type != rdev->wiphy.sar_capa->type)
                return -EINVAL;

        specs = 0;
        nla_for_each_nested(spec_list, tb[NL80211_SAR_ATTR_SPECS], rem)
                specs++;

        if (specs > rdev->wiphy.sar_capa->num_freq_ranges)
                return -EINVAL;

        sar_spec = kzalloc(struct_size(sar_spec, sub_specs, specs), GFP_KERNEL);
        if (!sar_spec)
                return -ENOMEM;

        sar_spec->type = type;
        specs = 0;
        nla_for_each_nested(spec_list, tb[NL80211_SAR_ATTR_SPECS], rem) {
                nla_parse_nested(spec, NL80211_SAR_ATTR_SPECS_MAX,
                                 spec_list, NULL, NULL);

                switch (type) {
                case NL80211_SAR_TYPE_POWER:
                        if (nl80211_set_sar_sub_specs(rdev, sar_spec,
                                                      spec, specs)) {
                                err = -EINVAL;
                                goto error;
                        }
                        break;
                default:
                        err = -EINVAL;
                        goto error;
                }
                specs++;
        }

        sar_spec->num_sub_specs = specs;

        rdev->cur_cmd_info = info;
        err = rdev_set_sar_specs(rdev, sar_spec);
        rdev->cur_cmd_info = NULL;
error:
        kfree(sar_spec);
        return err;
}

#define SELECTOR(__sel, name, value) \
        ((__sel) == (value)) ? NL80211_IFL_SEL_##name :
int __missing_selector(void);
#define IFLAGS(__val) INTERNAL_FLAG_SELECTORS(__val) __missing_selector()

static const struct genl_ops nl80211_ops[] = {
        {
                .cmd = NL80211_CMD_GET_WIPHY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_wiphy,
                .dumpit = nl80211_dump_wiphy,
                .done = nl80211_dump_wiphy_done,
                /* can be retrieved by unprivileged users */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
};

static const struct genl_small_ops nl80211_small_ops[] = {
        {
                .cmd = NL80211_CMD_SET_WIPHY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_wiphy,
                .flags = GENL_UNS_ADMIN_PERM,
        },
        {
                .cmd = NL80211_CMD_GET_INTERFACE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_interface,
                .dumpit = nl80211_dump_interface,
                /* can be retrieved by unprivileged users */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV),
        },
        {
                .cmd = NL80211_CMD_SET_INTERFACE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_interface,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_NEW_INTERFACE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_new_interface,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags =
                        IFLAGS(NL80211_FLAG_NEED_WIPHY |
                               NL80211_FLAG_NEED_RTNL |
                               /* we take the wiphy mutex later ourselves */
                               NL80211_FLAG_NO_WIPHY_MTX),
        },
        {
                .cmd = NL80211_CMD_DEL_INTERFACE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_interface,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_GET_KEY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_key,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_KEY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_key,
                .flags = GENL_UNS_ADMIN_PERM,
                /* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on key */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_NEW_KEY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_new_key,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_DEL_KEY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_key,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_BEACON,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .flags = GENL_UNS_ADMIN_PERM,
                .doit = nl80211_set_beacon,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_START_AP,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .flags = GENL_UNS_ADMIN_PERM,
                .doit = nl80211_start_ap,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_STOP_AP,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .flags = GENL_UNS_ADMIN_PERM,
                .doit = nl80211_stop_ap,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_GET_STATION,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_station,
                .dumpit = nl80211_dump_station,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_SET_STATION,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_station,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_NEW_STATION,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_new_station,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_DEL_STATION,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_station,
                .flags = GENL_UNS_ADMIN_PERM,
                /* cannot use NL80211_FLAG_MLO_VALID_LINK_ID, depends on
                 * whether MAC address is passed or not. If MAC address is
                 * passed, then even during MLO, link ID is not required.
                 */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_GET_MPATH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_mpath,
                .dumpit = nl80211_dump_mpath,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_GET_MPP,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_mpp,
                .dumpit = nl80211_dump_mpp,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_MPATH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_mpath,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_NEW_MPATH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_new_mpath,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_DEL_MPATH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_mpath,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_BSS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_bss,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_GET_REG,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_reg_do,
                .dumpit = nl80211_get_reg_dump,
                /* can be retrieved by unprivileged users */
        },
#ifdef CONFIG_CFG80211_CRDA_SUPPORT
        {
                .cmd = NL80211_CMD_SET_REG,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_reg,
                .flags = GENL_ADMIN_PERM,
        },
#endif
        {
                .cmd = NL80211_CMD_REQ_SET_REG,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_req_set_reg,
                .flags = GENL_ADMIN_PERM,
        },
        {
                .cmd = NL80211_CMD_RELOAD_REGDB,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_reload_regdb,
                .flags = GENL_ADMIN_PERM,
        },
        {
                .cmd = NL80211_CMD_GET_MESH_CONFIG,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_mesh_config,
                /* can be retrieved by unprivileged users */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_MESH_CONFIG,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_update_mesh_config,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_TRIGGER_SCAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_trigger_scan,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_ABORT_SCAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_abort_scan,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_GET_SCAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .dumpit = nl80211_dump_scan,
        },
        {
                .cmd = NL80211_CMD_START_SCHED_SCAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_start_sched_scan,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_STOP_SCHED_SCAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_stop_sched_scan,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_AUTHENTICATE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_authenticate,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_ASSOCIATE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_associate,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_DEAUTHENTICATE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_deauthenticate,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_DISASSOCIATE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_disassociate,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_JOIN_IBSS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_join_ibss,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_LEAVE_IBSS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_leave_ibss,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
#ifdef CONFIG_NL80211_TESTMODE
        {
                .cmd = NL80211_CMD_TESTMODE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_testmode_do,
                .dumpit = nl80211_testmode_dump,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
#endif
        {
                .cmd = NL80211_CMD_CONNECT,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_connect,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_UPDATE_CONNECT_PARAMS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_update_connect_params,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_DISCONNECT,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_disconnect,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_WIPHY_NETNS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_wiphy_netns,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
                                         NL80211_FLAG_NEED_RTNL |
                                         NL80211_FLAG_NO_WIPHY_MTX),
        },
        {
                .cmd = NL80211_CMD_GET_SURVEY,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .dumpit = nl80211_dump_survey,
        },
        {
                .cmd = NL80211_CMD_SET_PMKSA,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_pmksa,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_DEL_PMKSA,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_pmksa,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_FLUSH_PMKSA,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_flush_pmksa,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_remain_on_channel,
                .flags = GENL_UNS_ADMIN_PERM,
                /* FIXME: requiring a link ID here is probably not good */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_cancel_remain_on_channel,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_TX_BITRATE_MASK,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_tx_bitrate_mask,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_REGISTER_FRAME,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_register_mgmt,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV),
        },
        {
                .cmd = NL80211_CMD_FRAME,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tx_mgmt,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_FRAME_WAIT_CANCEL,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tx_mgmt_cancel_wait,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_POWER_SAVE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_power_save,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_GET_POWER_SAVE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_power_save,
                /* can be retrieved by unprivileged users */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_SET_CQM,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_cqm,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_SET_CHANNEL,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_channel,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_JOIN_MESH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_join_mesh,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_LEAVE_MESH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_leave_mesh,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_JOIN_OCB,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_join_ocb,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_LEAVE_OCB,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_leave_ocb,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
#ifdef CONFIG_PM
        {
                .cmd = NL80211_CMD_GET_WOWLAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_wowlan,
                /* can be retrieved by unprivileged users */
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
        {
                .cmd = NL80211_CMD_SET_WOWLAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_wowlan,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
#endif
        {
                .cmd = NL80211_CMD_SET_REKEY_OFFLOAD,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_rekey_data,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_TDLS_MGMT,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tdls_mgmt,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_TDLS_OPER,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tdls_oper,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_UNEXPECTED_FRAME,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_register_unexpected_frame,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_PROBE_CLIENT,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_probe_client,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_REGISTER_BEACONS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_register_beacons,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
        {
                .cmd = NL80211_CMD_SET_NOACK_MAP,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_noack_map,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_START_P2P_DEVICE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_start_p2p_device,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_STOP_P2P_DEVICE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_stop_p2p_device,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_START_NAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_start_nan,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_STOP_NAN,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_stop_nan,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_ADD_NAN_FUNCTION,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_nan_add_func,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_DEL_NAN_FUNCTION,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_nan_del_func,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_CHANGE_NAN_CONFIG,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_nan_change_config,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_MCAST_RATE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_mcast_rate,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_SET_MAC_ACL,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_mac_acl,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
                                         NL80211_FLAG_MLO_UNSUPPORTED),
        },
        {
                .cmd = NL80211_CMD_RADAR_DETECT,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_start_radar_detection,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_NO_WIPHY_MTX |
                                         NL80211_FLAG_MLO_UNSUPPORTED),
        },
        {
                .cmd = NL80211_CMD_GET_PROTOCOL_FEATURES,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_protocol_features,
        },
        {
                .cmd = NL80211_CMD_UPDATE_FT_IES,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_update_ft_ies,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_CRIT_PROTOCOL_START,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_crit_protocol_start,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_CRIT_PROTOCOL_STOP,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_crit_protocol_stop,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_GET_COALESCE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_coalesce,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
        {
                .cmd = NL80211_CMD_SET_COALESCE,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_coalesce,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY),
        },
        {
                .cmd = NL80211_CMD_CHANNEL_SWITCH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_channel_switch,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_VENDOR,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_vendor_cmd,
                .dumpit = nl80211_vendor_cmd_dump,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_SET_QOS_MAP,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_qos_map,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_ADD_TX_TS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_add_tx_ts,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_UNSUPPORTED),
        },
        {
                .cmd = NL80211_CMD_DEL_TX_TS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_tx_ts,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_TDLS_CHANNEL_SWITCH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tdls_channel_switch,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tdls_cancel_channel_switch,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_MULTICAST_TO_UNICAST,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_multicast_to_unicast,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV),
        },
        {
                .cmd = NL80211_CMD_SET_PMK,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_pmk,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_CLEAR_SKB),
        },
        {
                .cmd = NL80211_CMD_DEL_PMK,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_del_pmk,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_EXTERNAL_AUTH,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_external_auth,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_CONTROL_PORT_FRAME,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_tx_control_port,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_GET_FTM_RESPONDER_STATS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_get_ftm_responder_stats,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_PEER_MEASUREMENT_START,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_pmsr_start,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WDEV_UP),
        },
        {
                .cmd = NL80211_CMD_NOTIFY_RADAR,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_notify_radar_detection,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_UPDATE_OWE_INFO,
                .doit = nl80211_update_owe_info,
                .flags = GENL_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_PROBE_MESH_LINK,
                .doit = nl80211_probe_mesh_link,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_TID_CONFIG,
                .doit = nl80211_set_tid_config,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_SET_SAR_SPECS,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_sar_specs,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_WIPHY |
                                         NL80211_FLAG_NEED_RTNL),
        },
        {
                .cmd = NL80211_CMD_COLOR_CHANGE_REQUEST,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_color_change,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_SET_FILS_AAD,
                .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
                .doit = nl80211_set_fils_aad,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_ADD_LINK,
                .doit = nl80211_add_link,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_REMOVE_LINK,
                .doit = nl80211_remove_link,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_ADD_LINK_STA,
                .doit = nl80211_add_link_station,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_MODIFY_LINK_STA,
                .doit = nl80211_modify_link_station,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_REMOVE_LINK_STA,
                .doit = nl80211_remove_link_station,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP |
                                         NL80211_FLAG_MLO_VALID_LINK_ID),
        },
        {
                .cmd = NL80211_CMD_SET_HW_TIMESTAMP,
                .doit = nl80211_set_hw_timestamp,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
        {
                .cmd = NL80211_CMD_SET_TID_TO_LINK_MAPPING,
                .doit = nl80211_set_ttlm,
                .flags = GENL_UNS_ADMIN_PERM,
                .internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
        },
};

static struct genl_family nl80211_fam __ro_after_init = {
        .name = NL80211_GENL_NAME,        /* have users key off the name instead */
        .hdrsize = 0,                        /* no private header */
        .version = 1,                        /* no particular meaning now */
        .maxattr = NL80211_ATTR_MAX,
        .policy = nl80211_policy,
        .netnsok = true,
        .pre_doit = nl80211_pre_doit,
        .post_doit = nl80211_post_doit,
        .module = THIS_MODULE,
        .ops = nl80211_ops,
        .n_ops = ARRAY_SIZE(nl80211_ops),
        .small_ops = nl80211_small_ops,
        .n_small_ops = ARRAY_SIZE(nl80211_small_ops),
        .resv_start_op = NL80211_CMD_REMOVE_LINK_STA + 1,
        .mcgrps = nl80211_mcgrps,
        .n_mcgrps = ARRAY_SIZE(nl80211_mcgrps),
        .parallel_ops = true,
};

/* notification functions */

void nl80211_notify_wiphy(struct cfg80211_registered_device *rdev,
                          enum nl80211_commands cmd)
{
        struct sk_buff *msg;
        struct nl80211_dump_wiphy_state state = {};

        WARN_ON(cmd != NL80211_CMD_NEW_WIPHY &&
                cmd != NL80211_CMD_DEL_WIPHY);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        if (nl80211_send_wiphy(rdev, cmd, msg, 0, 0, 0, &state) < 0) {
                nlmsg_free(msg);
                return;
        }

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_CONFIG, GFP_KERNEL);
}

void nl80211_notify_iface(struct cfg80211_registered_device *rdev,
                                struct wireless_dev *wdev,
                                enum nl80211_commands cmd)
{
        struct sk_buff *msg;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        if (nl80211_send_iface(msg, 0, 0, 0, rdev, wdev, cmd) < 0) {
                nlmsg_free(msg);
                return;
        }

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_CONFIG, GFP_KERNEL);
}

static int nl80211_add_scan_req(struct sk_buff *msg,
                                struct cfg80211_registered_device *rdev)
{
        struct cfg80211_scan_request *req = rdev->scan_req;
        struct nlattr *nest;
        int i;
        struct cfg80211_scan_info *info;

        if (WARN_ON(!req))
                return 0;

        nest = nla_nest_start_noflag(msg, NL80211_ATTR_SCAN_SSIDS);
        if (!nest)
                goto nla_put_failure;
        for (i = 0; i < req->n_ssids; i++) {
                if (nla_put(msg, i, req->ssids[i].ssid_len, req->ssids[i].ssid))
                        goto nla_put_failure;
        }
        nla_nest_end(msg, nest);

        if (req->flags & NL80211_SCAN_FLAG_FREQ_KHZ) {
                nest = nla_nest_start(msg, NL80211_ATTR_SCAN_FREQ_KHZ);
                if (!nest)
                        goto nla_put_failure;
                for (i = 0; i < req->n_channels; i++) {
                        if (nla_put_u32(msg, i,
                                   ieee80211_channel_to_khz(req->channels[i])))
                                goto nla_put_failure;
                }
                nla_nest_end(msg, nest);
        } else {
                nest = nla_nest_start_noflag(msg,
                                             NL80211_ATTR_SCAN_FREQUENCIES);
                if (!nest)
                        goto nla_put_failure;
                for (i = 0; i < req->n_channels; i++) {
                        if (nla_put_u32(msg, i, req->channels[i]->center_freq))
                                goto nla_put_failure;
                }
                nla_nest_end(msg, nest);
        }

        if (req->ie &&
            nla_put(msg, NL80211_ATTR_IE, req->ie_len, req->ie))
                goto nla_put_failure;

        if (req->flags &&
            nla_put_u32(msg, NL80211_ATTR_SCAN_FLAGS, req->flags))
                goto nla_put_failure;

        info = rdev->int_scan_req ? &rdev->int_scan_req->info :
                &rdev->scan_req->info;
        if (info->scan_start_tsf &&
            (nla_put_u64_64bit(msg, NL80211_ATTR_SCAN_START_TIME_TSF,
                               info->scan_start_tsf, NL80211_BSS_PAD) ||
             nla_put(msg, NL80211_ATTR_SCAN_START_TIME_TSF_BSSID, ETH_ALEN,
                     info->tsf_bssid)))
                goto nla_put_failure;

        return 0;
 nla_put_failure:
        return -ENOBUFS;
}

static int nl80211_prep_scan_msg(struct sk_buff *msg,
                                 struct cfg80211_registered_device *rdev,
                                 struct wireless_dev *wdev,
                                 u32 portid, u32 seq, int flags,
                                 u32 cmd)
{
        void *hdr;

        hdr = nl80211hdr_put(msg, portid, seq, flags, cmd);
        if (!hdr)
                return -1;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                         wdev->netdev->ifindex)) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        /* ignore errors and send incomplete event anyway */
        nl80211_add_scan_req(msg, rdev);

        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

static int
nl80211_prep_sched_scan_msg(struct sk_buff *msg,
                            struct cfg80211_sched_scan_request *req, u32 cmd)
{
        void *hdr;

        hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
        if (!hdr)
                return -1;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY,
                        wiphy_to_rdev(req->wiphy)->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, req->dev->ifindex) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, req->reqid,
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        return 0;

 nla_put_failure:
        genlmsg_cancel(msg, hdr);
        return -EMSGSIZE;
}

void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
                             struct wireless_dev *wdev)
{
        struct sk_buff *msg;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
                                  NL80211_CMD_TRIGGER_SCAN) < 0) {
                nlmsg_free(msg);
                return;
        }

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_SCAN, GFP_KERNEL);
}

struct sk_buff *nl80211_build_scan_msg(struct cfg80211_registered_device *rdev,
                                       struct wireless_dev *wdev, bool aborted)
{
        struct sk_buff *msg;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return NULL;

        if (nl80211_prep_scan_msg(msg, rdev, wdev, 0, 0, 0,
                                  aborted ? NL80211_CMD_SCAN_ABORTED :
                                            NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
                nlmsg_free(msg);
                return NULL;
        }

        return msg;
}

/* send message created by nl80211_build_scan_msg() */
void nl80211_send_scan_msg(struct cfg80211_registered_device *rdev,
                           struct sk_buff *msg)
{
        if (!msg)
                return;

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_SCAN, GFP_KERNEL);
}

void nl80211_send_sched_scan(struct cfg80211_sched_scan_request *req, u32 cmd)
{
        struct sk_buff *msg;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        if (nl80211_prep_sched_scan_msg(msg, req, cmd) < 0) {
                nlmsg_free(msg);
                return;
        }

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(req->wiphy), msg, 0,
                                NL80211_MCGRP_SCAN, GFP_KERNEL);
}

static bool nl80211_reg_change_event_fill(struct sk_buff *msg,
                                          struct regulatory_request *request)
{
        /* Userspace can always count this one always being set */
        if (nla_put_u8(msg, NL80211_ATTR_REG_INITIATOR, request->initiator))
                goto nla_put_failure;

        if (request->alpha2[0] == '0' && request->alpha2[1] == '0') {
                if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
                               NL80211_REGDOM_TYPE_WORLD))
                        goto nla_put_failure;
        } else if (request->alpha2[0] == '9' && request->alpha2[1] == '9') {
                if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
                               NL80211_REGDOM_TYPE_CUSTOM_WORLD))
                        goto nla_put_failure;
        } else if ((request->alpha2[0] == '9' && request->alpha2[1] == '8') ||
                   request->intersect) {
                if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
                               NL80211_REGDOM_TYPE_INTERSECTION))
                        goto nla_put_failure;
        } else {
                if (nla_put_u8(msg, NL80211_ATTR_REG_TYPE,
                               NL80211_REGDOM_TYPE_COUNTRY) ||
                    nla_put_string(msg, NL80211_ATTR_REG_ALPHA2,
                                   request->alpha2))
                        goto nla_put_failure;
        }

        if (request->wiphy_idx != WIPHY_IDX_INVALID) {
                struct wiphy *wiphy = wiphy_idx_to_wiphy(request->wiphy_idx);

                if (wiphy &&
                    nla_put_u32(msg, NL80211_ATTR_WIPHY, request->wiphy_idx))
                        goto nla_put_failure;

                if (wiphy &&
                    wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
                    nla_put_flag(msg, NL80211_ATTR_WIPHY_SELF_MANAGED_REG))
                        goto nla_put_failure;
        }

        return true;

nla_put_failure:
        return false;
}

/*
 * This can happen on global regulatory changes or device specific settings
 * based on custom regulatory domains.
 */
void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
                                     struct regulatory_request *request)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, cmd_id);
        if (!hdr)
                goto nla_put_failure;

        if (!nl80211_reg_change_event_fill(msg, request))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        rcu_read_lock();
        genlmsg_multicast_allns(&nl80211_fam, msg, 0,
                                NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
        rcu_read_unlock();

        return;

nla_put_failure:
        nlmsg_free(msg);
}

struct nl80211_mlme_event {
        enum nl80211_commands cmd;
        const u8 *buf;
        size_t buf_len;
        int uapsd_queues;
        const u8 *req_ies;
        size_t req_ies_len;
        bool reconnect;
};

static void nl80211_send_mlme_event(struct cfg80211_registered_device *rdev,
                                    struct net_device *netdev,
                                    const struct nl80211_mlme_event *event,
                                    gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(100 + event->buf_len + event->req_ies_len, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, event->cmd);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_FRAME, event->buf_len, event->buf) ||
            (event->req_ies &&
             nla_put(msg, NL80211_ATTR_REQ_IE, event->req_ies_len,
                     event->req_ies)))
                goto nla_put_failure;

        if (event->reconnect &&
            nla_put_flag(msg, NL80211_ATTR_RECONNECT_REQUESTED))
                goto nla_put_failure;

        if (event->uapsd_queues >= 0) {
                struct nlattr *nla_wmm =
                        nla_nest_start_noflag(msg, NL80211_ATTR_STA_WME);
                if (!nla_wmm)
                        goto nla_put_failure;

                if (nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
                               event->uapsd_queues))
                        goto nla_put_failure;

                nla_nest_end(msg, nla_wmm);
        }

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void nl80211_send_rx_auth(struct cfg80211_registered_device *rdev,
                          struct net_device *netdev, const u8 *buf,
                          size_t len, gfp_t gfp)
{
        struct nl80211_mlme_event event = {
                .cmd = NL80211_CMD_AUTHENTICATE,
                .buf = buf,
                .buf_len = len,
                .uapsd_queues = -1,
        };

        nl80211_send_mlme_event(rdev, netdev, &event, gfp);
}

void nl80211_send_rx_assoc(struct cfg80211_registered_device *rdev,
                           struct net_device *netdev,
                           const struct cfg80211_rx_assoc_resp_data *data)
{
        struct nl80211_mlme_event event = {
                .cmd = NL80211_CMD_ASSOCIATE,
                .buf = data->buf,
                .buf_len = data->len,
                .uapsd_queues = data->uapsd_queues,
                .req_ies = data->req_ies,
                .req_ies_len = data->req_ies_len,
        };

        nl80211_send_mlme_event(rdev, netdev, &event, GFP_KERNEL);
}

void nl80211_send_deauth(struct cfg80211_registered_device *rdev,
                         struct net_device *netdev, const u8 *buf,
                         size_t len, bool reconnect, gfp_t gfp)
{
        struct nl80211_mlme_event event = {
                .cmd = NL80211_CMD_DEAUTHENTICATE,
                .buf = buf,
                .buf_len = len,
                .reconnect = reconnect,
                .uapsd_queues = -1,
        };

        nl80211_send_mlme_event(rdev, netdev, &event, gfp);
}

void nl80211_send_disassoc(struct cfg80211_registered_device *rdev,
                           struct net_device *netdev, const u8 *buf,
                           size_t len, bool reconnect, gfp_t gfp)
{
        struct nl80211_mlme_event event = {
                .cmd = NL80211_CMD_DISASSOCIATE,
                .buf = buf,
                .buf_len = len,
                .reconnect = reconnect,
                .uapsd_queues = -1,
        };

        nl80211_send_mlme_event(rdev, netdev, &event, gfp);
}

void cfg80211_rx_unprot_mlme_mgmt(struct net_device *dev, const u8 *buf,
                                  size_t len)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        const struct ieee80211_mgmt *mgmt = (void *)buf;
        struct nl80211_mlme_event event = {
                .buf = buf,
                .buf_len = len,
                .uapsd_queues = -1,
        };

        if (WARN_ON(len < 2))
                return;

        if (ieee80211_is_deauth(mgmt->frame_control)) {
                event.cmd = NL80211_CMD_UNPROT_DEAUTHENTICATE;
        } else if (ieee80211_is_disassoc(mgmt->frame_control)) {
                event.cmd = NL80211_CMD_UNPROT_DISASSOCIATE;
        } else if (ieee80211_is_beacon(mgmt->frame_control)) {
                if (wdev->unprot_beacon_reported &&
                    elapsed_jiffies_msecs(wdev->unprot_beacon_reported) < 10000)
                        return;
                event.cmd = NL80211_CMD_UNPROT_BEACON;
                wdev->unprot_beacon_reported = jiffies;
        } else {
                return;
        }

        trace_cfg80211_rx_unprot_mlme_mgmt(dev, buf, len);
        nl80211_send_mlme_event(rdev, dev, &event, GFP_ATOMIC);
}
EXPORT_SYMBOL(cfg80211_rx_unprot_mlme_mgmt);

static void nl80211_send_mlme_timeout(struct cfg80211_registered_device *rdev,
                                      struct net_device *netdev, int cmd,
                                      const u8 *addr, gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void nl80211_send_auth_timeout(struct cfg80211_registered_device *rdev,
                               struct net_device *netdev, const u8 *addr,
                               gfp_t gfp)
{
        nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_AUTHENTICATE,
                                  addr, gfp);
}

void nl80211_send_assoc_timeout(struct cfg80211_registered_device *rdev,
                                struct net_device *netdev, const u8 *addr,
                                gfp_t gfp)
{
        nl80211_send_mlme_timeout(rdev, netdev, NL80211_CMD_ASSOCIATE,
                                  addr, gfp);
}

void nl80211_send_connect_result(struct cfg80211_registered_device *rdev,
                                 struct net_device *netdev,
                                 struct cfg80211_connect_resp_params *cr,
                                 gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;
        unsigned int link;
        size_t link_info_size = 0;
        const u8 *connected_addr = cr->valid_links ?
                                   cr->ap_mld_addr : cr->links[0].bssid;

        if (cr->valid_links) {
                for_each_valid_link(cr, link) {
                        /* Nested attribute header */
                        link_info_size += NLA_HDRLEN;
                        /* Link ID */
                        link_info_size += nla_total_size(sizeof(u8));
                        link_info_size += cr->links[link].addr ?
                                          nla_total_size(ETH_ALEN) : 0;
                        link_info_size += (cr->links[link].bssid ||
                                           cr->links[link].bss) ?
                                          nla_total_size(ETH_ALEN) : 0;
                        link_info_size += nla_total_size(sizeof(u16));
                }
        }

        msg = nlmsg_new(100 + cr->req_ie_len + cr->resp_ie_len +
                        cr->fils.kek_len + cr->fils.pmk_len +
                        (cr->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size,
                        gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONNECT);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            (connected_addr &&
             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, connected_addr)) ||
            nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
                        cr->status < 0 ? WLAN_STATUS_UNSPECIFIED_FAILURE :
                        cr->status) ||
            (cr->status < 0 &&
             (nla_put_flag(msg, NL80211_ATTR_TIMED_OUT) ||
              nla_put_u32(msg, NL80211_ATTR_TIMEOUT_REASON,
                          cr->timeout_reason))) ||
            (cr->req_ie &&
             nla_put(msg, NL80211_ATTR_REQ_IE, cr->req_ie_len, cr->req_ie)) ||
            (cr->resp_ie &&
             nla_put(msg, NL80211_ATTR_RESP_IE, cr->resp_ie_len,
                     cr->resp_ie)) ||
            (cr->fils.update_erp_next_seq_num &&
             nla_put_u16(msg, NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM,
                         cr->fils.erp_next_seq_num)) ||
            (cr->status == WLAN_STATUS_SUCCESS &&
             ((cr->fils.kek &&
               nla_put(msg, NL80211_ATTR_FILS_KEK, cr->fils.kek_len,
                       cr->fils.kek)) ||
              (cr->fils.pmk &&
               nla_put(msg, NL80211_ATTR_PMK, cr->fils.pmk_len, cr->fils.pmk)) ||
              (cr->fils.pmkid &&
               nla_put(msg, NL80211_ATTR_PMKID, WLAN_PMKID_LEN, cr->fils.pmkid)))))
                goto nla_put_failure;

        if (cr->valid_links) {
                int i = 1;
                struct nlattr *nested;

                nested = nla_nest_start(msg, NL80211_ATTR_MLO_LINKS);
                if (!nested)
                        goto nla_put_failure;

                for_each_valid_link(cr, link) {
                        struct nlattr *nested_mlo_links;
                        const u8 *bssid = cr->links[link].bss ?
                                          cr->links[link].bss->bssid :
                                          cr->links[link].bssid;

                        nested_mlo_links = nla_nest_start(msg, i);
                        if (!nested_mlo_links)
                                goto nla_put_failure;

                        if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link) ||
                            (bssid &&
                             nla_put(msg, NL80211_ATTR_BSSID, ETH_ALEN, bssid)) ||
                            (cr->links[link].addr &&
                             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
                                     cr->links[link].addr)) ||
                            nla_put_u16(msg, NL80211_ATTR_STATUS_CODE,
                                        cr->links[link].status))
                                goto nla_put_failure;

                        nla_nest_end(msg, nested_mlo_links);
                        i++;
                }
                nla_nest_end(msg, nested);
        }

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void nl80211_send_roamed(struct cfg80211_registered_device *rdev,
                         struct net_device *netdev,
                         struct cfg80211_roam_info *info, gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;
        size_t link_info_size = 0;
        unsigned int link;
        const u8 *connected_addr = info->ap_mld_addr ?
                                   info->ap_mld_addr :
                                   (info->links[0].bss ?
                                    info->links[0].bss->bssid :
                                    info->links[0].bssid);

        if (info->valid_links) {
                for_each_valid_link(info, link) {
                        /* Nested attribute header */
                        link_info_size += NLA_HDRLEN;
                        /* Link ID */
                        link_info_size += nla_total_size(sizeof(u8));
                        link_info_size += info->links[link].addr ?
                                          nla_total_size(ETH_ALEN) : 0;
                        link_info_size += (info->links[link].bssid ||
                                           info->links[link].bss) ?
                                          nla_total_size(ETH_ALEN) : 0;
                }
        }

        msg = nlmsg_new(100 + info->req_ie_len + info->resp_ie_len +
                        info->fils.kek_len + info->fils.pmk_len +
                        (info->fils.pmkid ? WLAN_PMKID_LEN : 0) +
                        link_info_size, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ROAM);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, connected_addr) ||
            (info->req_ie &&
             nla_put(msg, NL80211_ATTR_REQ_IE, info->req_ie_len,
                     info->req_ie)) ||
            (info->resp_ie &&
             nla_put(msg, NL80211_ATTR_RESP_IE, info->resp_ie_len,
                     info->resp_ie)) ||
            (info->fils.update_erp_next_seq_num &&
             nla_put_u16(msg, NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM,
                         info->fils.erp_next_seq_num)) ||
            (info->fils.kek &&
             nla_put(msg, NL80211_ATTR_FILS_KEK, info->fils.kek_len,
                     info->fils.kek)) ||
            (info->fils.pmk &&
             nla_put(msg, NL80211_ATTR_PMK, info->fils.pmk_len, info->fils.pmk)) ||
            (info->fils.pmkid &&
             nla_put(msg, NL80211_ATTR_PMKID, WLAN_PMKID_LEN, info->fils.pmkid)))
                goto nla_put_failure;

        if (info->valid_links) {
                int i = 1;
                struct nlattr *nested;

                nested = nla_nest_start(msg, NL80211_ATTR_MLO_LINKS);
                if (!nested)
                        goto nla_put_failure;

                for_each_valid_link(info, link) {
                        struct nlattr *nested_mlo_links;
                        const u8 *bssid = info->links[link].bss ?
                                          info->links[link].bss->bssid :
                                          info->links[link].bssid;

                        nested_mlo_links = nla_nest_start(msg, i);
                        if (!nested_mlo_links)
                                goto nla_put_failure;

                        if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link) ||
                            (bssid &&
                             nla_put(msg, NL80211_ATTR_BSSID, ETH_ALEN, bssid)) ||
                            (info->links[link].addr &&
                             nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN,
                                     info->links[link].addr)))
                                goto nla_put_failure;

                        nla_nest_end(msg, nested_mlo_links);
                        i++;
                }
                nla_nest_end(msg, nested);
        }

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void nl80211_send_port_authorized(struct cfg80211_registered_device *rdev,
                                  struct net_device *netdev, const u8 *peer_addr,
                                  const u8 *td_bitmap, u8 td_bitmap_len)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PORT_AUTHORIZED);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer_addr))
                goto nla_put_failure;

        if ((td_bitmap_len > 0) && td_bitmap)
                if (nla_put(msg, NL80211_ATTR_TD_BITMAP,
                            td_bitmap_len, td_bitmap))
                        goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
                               struct net_device *netdev, u16 reason,
                               const u8 *ie, size_t ie_len, bool from_ap)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(100 + ie_len, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DISCONNECT);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            (reason &&
             nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason)) ||
            (from_ap &&
             nla_put_flag(msg, NL80211_ATTR_DISCONNECTED_BY_AP)) ||
            (ie && nla_put(msg, NL80211_ATTR_IE, ie_len, ie)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_links_removed(struct net_device *dev, u16 link_mask)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        struct nlattr *links;
        void *hdr;

        lockdep_assert_wiphy(wdev->wiphy);
        trace_cfg80211_links_removed(dev, link_mask);

        if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
                    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
                return;

        if (WARN_ON(!wdev->valid_links || !link_mask ||
                    (wdev->valid_links & link_mask) != link_mask ||
                    wdev->valid_links == link_mask))
                return;

        cfg80211_wdev_release_link_bsses(wdev, link_mask);
        wdev->valid_links &= ~link_mask;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_LINKS_REMOVED);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
                goto nla_put_failure;

        links = nla_nest_start(msg, NL80211_ATTR_MLO_LINKS);
        if (!links)
                goto nla_put_failure;

        while (link_mask) {
                struct nlattr *link;
                int link_id = __ffs(link_mask);

                link = nla_nest_start(msg, link_id + 1);
                if (!link)
                        goto nla_put_failure;

                if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id))
                        goto nla_put_failure;

                nla_nest_end(msg, link);
                link_mask &= ~(1 << link_id);
        }

        nla_nest_end(msg, links);

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_links_removed);

void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
                             struct net_device *netdev, const u8 *bssid,
                             gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_JOIN_IBSS);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_notify_new_peer_candidate(struct net_device *dev, const u8 *addr,
                                        const u8 *ie, u8 ie_len,
                                        int sig_dbm, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg;
        void *hdr;

        if (WARN_ON(wdev->iftype != NL80211_IFTYPE_MESH_POINT))
                return;

        trace_cfg80211_notify_new_peer_candidate(dev, addr);

        msg = nlmsg_new(100 + ie_len, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NEW_PEER_CANDIDATE);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            (ie_len && ie &&
             nla_put(msg, NL80211_ATTR_IE, ie_len, ie)) ||
            (sig_dbm &&
             nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_notify_new_peer_candidate);

void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
                                 struct net_device *netdev, const u8 *addr,
                                 enum nl80211_key_type key_type, int key_id,
                                 const u8 *tsc, gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_MICHAEL_MIC_FAILURE);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
            nla_put_u32(msg, NL80211_ATTR_KEY_TYPE, key_type) ||
            (key_id != -1 &&
             nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_id)) ||
            (tsc && nla_put(msg, NL80211_ATTR_KEY_SEQ, 6, tsc)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
                                    struct ieee80211_channel *channel_before,
                                    struct ieee80211_channel *channel_after)
{
        struct sk_buff *msg;
        void *hdr;
        struct nlattr *nl_freq;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        /*
         * Since we are applying the beacon hint to a wiphy we know its
         * wiphy_idx is valid
         */
        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy)))
                goto nla_put_failure;

        /* Before */
        nl_freq = nla_nest_start_noflag(msg, NL80211_ATTR_FREQ_BEFORE);
        if (!nl_freq)
                goto nla_put_failure;

        if (nl80211_msg_put_channel(msg, wiphy, channel_before, false))
                goto nla_put_failure;
        nla_nest_end(msg, nl_freq);

        /* After */
        nl_freq = nla_nest_start_noflag(msg, NL80211_ATTR_FREQ_AFTER);
        if (!nl_freq)
                goto nla_put_failure;

        if (nl80211_msg_put_channel(msg, wiphy, channel_after, false))
                goto nla_put_failure;
        nla_nest_end(msg, nl_freq);

        genlmsg_end(msg, hdr);

        rcu_read_lock();
        genlmsg_multicast_allns(&nl80211_fam, msg, 0,
                                NL80211_MCGRP_REGULATORY, GFP_ATOMIC);
        rcu_read_unlock();

        return;

nla_put_failure:
        nlmsg_free(msg);
}

static void nl80211_send_remain_on_chan_event(
        int cmd, struct cfg80211_registered_device *rdev,
        struct wireless_dev *wdev, u64 cookie,
        struct ieee80211_channel *chan,
        unsigned int duration, gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                         wdev->netdev->ifindex)) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
                        NL80211_CHAN_NO_HT) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL &&
            nla_put_u32(msg, NL80211_ATTR_DURATION, duration))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_assoc_comeback(struct net_device *netdev,
                             const u8 *ap_addr, u32 timeout)
{
        struct wireless_dev *wdev = netdev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        trace_cfg80211_assoc_comeback(wdev, ap_addr, timeout);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ASSOC_COMEBACK);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ap_addr) ||
            nla_put_u32(msg, NL80211_ATTR_TIMEOUT, timeout))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_assoc_comeback);

void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie,
                               struct ieee80211_channel *chan,
                               unsigned int duration, gfp_t gfp)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration);
        nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
                                          rdev, wdev, cookie, chan,
                                          duration, gfp);
}
EXPORT_SYMBOL(cfg80211_ready_on_channel);

void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie,
                                        struct ieee80211_channel *chan,
                                        gfp_t gfp)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan);
        nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
                                          rdev, wdev, cookie, chan, 0, gfp);
}
EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);

void cfg80211_tx_mgmt_expired(struct wireless_dev *wdev, u64 cookie,
                                        struct ieee80211_channel *chan,
                                        gfp_t gfp)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        trace_cfg80211_tx_mgmt_expired(wdev, cookie, chan);
        nl80211_send_remain_on_chan_event(NL80211_CMD_FRAME_WAIT_CANCEL,
                                          rdev, wdev, cookie, chan, 0, gfp);
}
EXPORT_SYMBOL(cfg80211_tx_mgmt_expired);

void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
                      struct station_info *sinfo, gfp_t gfp)
{
        struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;

        trace_cfg80211_new_sta(dev, mac_addr, sinfo);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        if (nl80211_send_station(msg, NL80211_CMD_NEW_STATION, 0, 0, 0,
                                 rdev, dev, mac_addr, sinfo) < 0) {
                nlmsg_free(msg);
                return;
        }

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
}
EXPORT_SYMBOL(cfg80211_new_sta);

void cfg80211_del_sta_sinfo(struct net_device *dev, const u8 *mac_addr,
                            struct station_info *sinfo, gfp_t gfp)
{
        struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        struct station_info empty_sinfo = {};

        if (!sinfo)
                sinfo = &empty_sinfo;

        trace_cfg80211_del_sta(dev, mac_addr);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg) {
                cfg80211_sinfo_release_content(sinfo);
                return;
        }

        if (nl80211_send_station(msg, NL80211_CMD_DEL_STATION, 0, 0, 0,
                                 rdev, dev, mac_addr, sinfo) < 0) {
                nlmsg_free(msg);
                return;
        }

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
}
EXPORT_SYMBOL(cfg80211_del_sta_sinfo);

void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
                          enum nl80211_connect_failed_reason reason,
                          gfp_t gfp)
{
        struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONN_FAILED);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac_addr) ||
            nla_put_u32(msg, NL80211_ATTR_CONN_FAILED_REASON, reason))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_conn_failed);

static bool __nl80211_unexpected_frame(struct net_device *dev, u8 cmd,
                                       const u8 *addr, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg;
        void *hdr;
        u32 nlportid = READ_ONCE(wdev->ap_unexpected_nlportid);

        if (!nlportid)
                return false;

        msg = nlmsg_new(100, gfp);
        if (!msg)
                return true;

        hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
        if (!hdr) {
                nlmsg_free(msg);
                return true;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
        return true;

 nla_put_failure:
        nlmsg_free(msg);
        return true;
}

bool cfg80211_rx_spurious_frame(struct net_device *dev,
                                const u8 *addr, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        bool ret;

        trace_cfg80211_rx_spurious_frame(dev, addr);

        if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
                    wdev->iftype != NL80211_IFTYPE_P2P_GO)) {
                trace_cfg80211_return_bool(false);
                return false;
        }
        ret = __nl80211_unexpected_frame(dev, NL80211_CMD_UNEXPECTED_FRAME,
                                         addr, gfp);
        trace_cfg80211_return_bool(ret);
        return ret;
}
EXPORT_SYMBOL(cfg80211_rx_spurious_frame);

bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev,
                                        const u8 *addr, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        bool ret;

        trace_cfg80211_rx_unexpected_4addr_frame(dev, addr);

        if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP &&
                    wdev->iftype != NL80211_IFTYPE_P2P_GO &&
                    wdev->iftype != NL80211_IFTYPE_AP_VLAN)) {
                trace_cfg80211_return_bool(false);
                return false;
        }
        ret = __nl80211_unexpected_frame(dev,
                                         NL80211_CMD_UNEXPECTED_4ADDR_FRAME,
                                         addr, gfp);
        trace_cfg80211_return_bool(ret);
        return ret;
}
EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);

int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
                      struct wireless_dev *wdev, u32 nlportid,
                      struct cfg80211_rx_info *info, gfp_t gfp)
{
        struct net_device *netdev = wdev->netdev;
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(100 + info->len, gfp);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
        if (!hdr) {
                nlmsg_free(msg);
                return -ENOMEM;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                        netdev->ifindex)) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            (info->have_link_id &&
             nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, info->link_id)) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, KHZ_TO_MHZ(info->freq)) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_OFFSET, info->freq % 1000) ||
            (info->sig_dbm &&
             nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, info->sig_dbm)) ||
            nla_put(msg, NL80211_ATTR_FRAME, info->len, info->buf) ||
            (info->flags &&
             nla_put_u32(msg, NL80211_ATTR_RXMGMT_FLAGS, info->flags)) ||
            (info->rx_tstamp && nla_put_u64_64bit(msg,
                                                  NL80211_ATTR_RX_HW_TIMESTAMP,
                                                  info->rx_tstamp,
                                                  NL80211_ATTR_PAD)) ||
            (info->ack_tstamp && nla_put_u64_64bit(msg,
                                                   NL80211_ATTR_TX_HW_TIMESTAMP,
                                                   info->ack_tstamp,
                                                   NL80211_ATTR_PAD)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);

 nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}

static void nl80211_frame_tx_status(struct wireless_dev *wdev,
                                    struct cfg80211_tx_status *status,
                                    gfp_t gfp, enum nl80211_commands command)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct net_device *netdev = wdev->netdev;
        struct sk_buff *msg;
        void *hdr;

        if (command == NL80211_CMD_FRAME_TX_STATUS)
                trace_cfg80211_mgmt_tx_status(wdev, status->cookie,
                                              status->ack);
        else
                trace_cfg80211_control_port_tx_status(wdev, status->cookie,
                                                      status->ack);

        msg = nlmsg_new(100 + status->len, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, command);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            (netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                   netdev->ifindex)) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            nla_put(msg, NL80211_ATTR_FRAME, status->len, status->buf) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, status->cookie,
                              NL80211_ATTR_PAD) ||
            (status->ack && nla_put_flag(msg, NL80211_ATTR_ACK)) ||
            (status->tx_tstamp &&
             nla_put_u64_64bit(msg, NL80211_ATTR_TX_HW_TIMESTAMP,
                               status->tx_tstamp, NL80211_ATTR_PAD)) ||
            (status->ack_tstamp &&
             nla_put_u64_64bit(msg, NL80211_ATTR_RX_HW_TIMESTAMP,
                               status->ack_tstamp, NL80211_ATTR_PAD)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_control_port_tx_status(struct wireless_dev *wdev, u64 cookie,
                                     const u8 *buf, size_t len, bool ack,
                                     gfp_t gfp)
{
        struct cfg80211_tx_status status = {
                .cookie = cookie,
                .buf = buf,
                .len = len,
                .ack = ack
        };

        nl80211_frame_tx_status(wdev, &status, gfp,
                                NL80211_CMD_CONTROL_PORT_FRAME_TX_STATUS);
}
EXPORT_SYMBOL(cfg80211_control_port_tx_status);

void cfg80211_mgmt_tx_status_ext(struct wireless_dev *wdev,
                                 struct cfg80211_tx_status *status, gfp_t gfp)
{
        nl80211_frame_tx_status(wdev, status, gfp, NL80211_CMD_FRAME_TX_STATUS);
}
EXPORT_SYMBOL(cfg80211_mgmt_tx_status_ext);

static int __nl80211_rx_control_port(struct net_device *dev,
                                     struct sk_buff *skb,
                                     bool unencrypted,
                                     int link_id,
                                     gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct ethhdr *ehdr = eth_hdr(skb);
        const u8 *addr = ehdr->h_source;
        u16 proto = be16_to_cpu(skb->protocol);
        struct sk_buff *msg;
        void *hdr;
        struct nlattr *frame;

        u32 nlportid = READ_ONCE(wdev->conn_owner_nlportid);

        if (!nlportid)
                return -ENOENT;

        msg = nlmsg_new(100 + skb->len, gfp);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CONTROL_PORT_FRAME);
        if (!hdr) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            nla_put_u16(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE, proto) ||
            (link_id >= 0 &&
             nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id)) ||
            (unencrypted && nla_put_flag(msg,
                                         NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT)))
                goto nla_put_failure;

        frame = nla_reserve(msg, NL80211_ATTR_FRAME, skb->len);
        if (!frame)
                goto nla_put_failure;

        skb_copy_bits(skb, 0, nla_data(frame), skb->len);
        genlmsg_end(msg, hdr);

        return genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);

 nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}

bool cfg80211_rx_control_port(struct net_device *dev, struct sk_buff *skb,
                              bool unencrypted, int link_id)
{
        int ret;

        trace_cfg80211_rx_control_port(dev, skb, unencrypted, link_id);
        ret = __nl80211_rx_control_port(dev, skb, unencrypted, link_id,
                                        GFP_ATOMIC);
        trace_cfg80211_return_bool(ret == 0);
        return ret == 0;
}
EXPORT_SYMBOL(cfg80211_rx_control_port);

static struct sk_buff *cfg80211_prepare_cqm(struct net_device *dev,
                                            const char *mac, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        void **cb;

        if (!msg)
                return NULL;

        cb = (void **)msg->cb;

        cb[0] = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
        if (!cb[0]) {
                nlmsg_free(msg);
                return NULL;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
                goto nla_put_failure;

        if (mac && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
                goto nla_put_failure;

        cb[1] = nla_nest_start_noflag(msg, NL80211_ATTR_CQM);
        if (!cb[1])
                goto nla_put_failure;

        cb[2] = rdev;

        return msg;
 nla_put_failure:
        nlmsg_free(msg);
        return NULL;
}

static void cfg80211_send_cqm(struct sk_buff *msg, gfp_t gfp)
{
        void **cb = (void **)msg->cb;
        struct cfg80211_registered_device *rdev = cb[2];

        nla_nest_end(msg, cb[1]);
        genlmsg_end(msg, cb[0]);

        memset(msg->cb, 0, sizeof(msg->cb));

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
}

void cfg80211_cqm_rssi_notify(struct net_device *dev,
                              enum nl80211_cqm_rssi_threshold_event rssi_event,
                              s32 rssi_level, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_cqm_config *cqm_config;

        trace_cfg80211_cqm_rssi_notify(dev, rssi_event, rssi_level);

        if (WARN_ON(rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW &&
                    rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH))
                return;

        rcu_read_lock();
        cqm_config = rcu_dereference(wdev->cqm_config);
        if (cqm_config) {
                cqm_config->last_rssi_event_value = rssi_level;
                cqm_config->last_rssi_event_type = rssi_event;
                wiphy_work_queue(wdev->wiphy, &wdev->cqm_rssi_work);
        }
        rcu_read_unlock();
}
EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);

void cfg80211_cqm_rssi_notify_work(struct wiphy *wiphy, struct wiphy_work *work)
{
        struct wireless_dev *wdev = container_of(work, struct wireless_dev,
                                                 cqm_rssi_work);
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        enum nl80211_cqm_rssi_threshold_event rssi_event;
        struct cfg80211_cqm_config *cqm_config;
        struct sk_buff *msg;
        s32 rssi_level;

        cqm_config = wiphy_dereference(wdev->wiphy, wdev->cqm_config);
        if (!cqm_config)
                return;

        if (cqm_config->use_range_api)
                cfg80211_cqm_rssi_update(rdev, wdev->netdev, cqm_config);

        rssi_level = cqm_config->last_rssi_event_value;
        rssi_event = cqm_config->last_rssi_event_type;

        msg = cfg80211_prepare_cqm(wdev->netdev, NULL, GFP_KERNEL);
        if (!msg)
                return;

        if (nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
                        rssi_event))
                goto nla_put_failure;

        if (rssi_level && nla_put_s32(msg, NL80211_ATTR_CQM_RSSI_LEVEL,
                                      rssi_level))
                goto nla_put_failure;

        cfg80211_send_cqm(msg, GFP_KERNEL);

        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_cqm_txe_notify(struct net_device *dev,
                             const u8 *peer, u32 num_packets,
                             u32 rate, u32 intvl, gfp_t gfp)
{
        struct sk_buff *msg;

        msg = cfg80211_prepare_cqm(dev, peer, gfp);
        if (!msg)
                return;

        if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
                goto nla_put_failure;

        cfg80211_send_cqm(msg, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_cqm_txe_notify);

void cfg80211_cqm_pktloss_notify(struct net_device *dev,
                                 const u8 *peer, u32 num_packets, gfp_t gfp)
{
        struct sk_buff *msg;

        trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets);

        msg = cfg80211_prepare_cqm(dev, peer, gfp);
        if (!msg)
                return;

        if (nla_put_u32(msg, NL80211_ATTR_CQM_PKT_LOSS_EVENT, num_packets))
                goto nla_put_failure;

        cfg80211_send_cqm(msg, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);

void cfg80211_cqm_beacon_loss_notify(struct net_device *dev, gfp_t gfp)
{
        struct sk_buff *msg;

        msg = cfg80211_prepare_cqm(dev, NULL, gfp);
        if (!msg)
                return;

        if (nla_put_flag(msg, NL80211_ATTR_CQM_BEACON_LOSS_EVENT))
                goto nla_put_failure;

        cfg80211_send_cqm(msg, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_cqm_beacon_loss_notify);

static void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
                                     struct net_device *netdev, const u8 *bssid,
                                     const u8 *replay_ctr, gfp_t gfp)
{
        struct sk_buff *msg;
        struct nlattr *rekey_attr;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_REKEY_OFFLOAD);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))
                goto nla_put_failure;

        rekey_attr = nla_nest_start_noflag(msg, NL80211_ATTR_REKEY_DATA);
        if (!rekey_attr)
                goto nla_put_failure;

        if (nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR,
                    NL80211_REPLAY_CTR_LEN, replay_ctr))
                goto nla_put_failure;

        nla_nest_end(msg, rekey_attr);

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
                               const u8 *replay_ctr, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        trace_cfg80211_gtk_rekey_notify(dev, bssid);
        nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp);
}
EXPORT_SYMBOL(cfg80211_gtk_rekey_notify);

static void
nl80211_pmksa_candidate_notify(struct cfg80211_registered_device *rdev,
                               struct net_device *netdev, int index,
                               const u8 *bssid, bool preauth, gfp_t gfp)
{
        struct sk_buff *msg;
        struct nlattr *attr;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PMKSA_CANDIDATE);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
                goto nla_put_failure;

        attr = nla_nest_start_noflag(msg, NL80211_ATTR_PMKSA_CANDIDATE);
        if (!attr)
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_PMKSA_CANDIDATE_INDEX, index) ||
            nla_put(msg, NL80211_PMKSA_CANDIDATE_BSSID, ETH_ALEN, bssid) ||
            (preauth &&
             nla_put_flag(msg, NL80211_PMKSA_CANDIDATE_PREAUTH)))
                goto nla_put_failure;

        nla_nest_end(msg, attr);

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index,
                                     const u8 *bssid, bool preauth, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth);
        nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp);
}
EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify);

static void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
                                     struct net_device *netdev,
                                     unsigned int link_id,
                                     struct cfg80211_chan_def *chandef,
                                     gfp_t gfp,
                                     enum nl80211_commands notif,
                                     u8 count, bool quiet)
{
        struct wireless_dev *wdev = netdev->ieee80211_ptr;
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, notif);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
                goto nla_put_failure;

        if (wdev->valid_links &&
            nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id))
                goto nla_put_failure;

        if (nl80211_send_chandef(msg, chandef))
                goto nla_put_failure;

        if (notif == NL80211_CMD_CH_SWITCH_STARTED_NOTIFY) {
                if (nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT, count))
                        goto nla_put_failure;
                if (quiet &&
                    nla_put_flag(msg, NL80211_ATTR_CH_SWITCH_BLOCK_TX))
                        goto nla_put_failure;
        }

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_ch_switch_notify(struct net_device *dev,
                               struct cfg80211_chan_def *chandef,
                               unsigned int link_id)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        lockdep_assert_wiphy(wdev->wiphy);
        WARN_INVALID_LINK_ID(wdev, link_id);

        trace_cfg80211_ch_switch_notify(dev, chandef, link_id);

        switch (wdev->iftype) {
        case NL80211_IFTYPE_STATION:
        case NL80211_IFTYPE_P2P_CLIENT:
                if (!WARN_ON(!wdev->links[link_id].client.current_bss))
                        cfg80211_update_assoc_bss_entry(wdev, link_id,
                                                        chandef->chan);
                break;
        case NL80211_IFTYPE_MESH_POINT:
                wdev->u.mesh.chandef = *chandef;
                wdev->u.mesh.preset_chandef = *chandef;
                break;
        case NL80211_IFTYPE_AP:
        case NL80211_IFTYPE_P2P_GO:
                wdev->links[link_id].ap.chandef = *chandef;
                break;
        case NL80211_IFTYPE_ADHOC:
                wdev->u.ibss.chandef = *chandef;
                break;
        default:
                WARN_ON(1);
                break;
        }

        cfg80211_schedule_channels_check(wdev);
        cfg80211_sched_dfs_chan_update(rdev);

        nl80211_ch_switch_notify(rdev, dev, link_id, chandef, GFP_KERNEL,
                                 NL80211_CMD_CH_SWITCH_NOTIFY, 0, false);
}
EXPORT_SYMBOL(cfg80211_ch_switch_notify);

void cfg80211_ch_switch_started_notify(struct net_device *dev,
                                       struct cfg80211_chan_def *chandef,
                                       unsigned int link_id, u8 count,
                                       bool quiet)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);

        lockdep_assert_wiphy(wdev->wiphy);
        WARN_INVALID_LINK_ID(wdev, link_id);

        trace_cfg80211_ch_switch_started_notify(dev, chandef, link_id);


        nl80211_ch_switch_notify(rdev, dev, link_id, chandef, GFP_KERNEL,
                                 NL80211_CMD_CH_SWITCH_STARTED_NOTIFY,
                                 count, quiet);
}
EXPORT_SYMBOL(cfg80211_ch_switch_started_notify);

int cfg80211_bss_color_notify(struct net_device *dev,
                              enum nl80211_commands cmd, u8 count,
                              u64 color_bitmap, u8 link_id)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        lockdep_assert_wiphy(wdev->wiphy);

        trace_cfg80211_bss_color_notify(dev, cmd, count, color_bitmap);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
        if (!hdr)
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
                goto nla_put_failure;

        if (wdev->valid_links &&
            nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id))
                goto nla_put_failure;

        if (cmd == NL80211_CMD_COLOR_CHANGE_STARTED &&
            nla_put_u32(msg, NL80211_ATTR_COLOR_CHANGE_COUNT, count))
                goto nla_put_failure;

        if (cmd == NL80211_CMD_OBSS_COLOR_COLLISION &&
            nla_put_u64_64bit(msg, NL80211_ATTR_OBSS_COLOR_BITMAP,
                              color_bitmap, NL80211_ATTR_PAD))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        return genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy),
                                       msg, 0, NL80211_MCGRP_MLME, GFP_KERNEL);

nla_put_failure:
        nlmsg_free(msg);
        return -EINVAL;
}
EXPORT_SYMBOL(cfg80211_bss_color_notify);

void
nl80211_radar_notify(struct cfg80211_registered_device *rdev,
                     const struct cfg80211_chan_def *chandef,
                     enum nl80211_radar_event event,
                     struct net_device *netdev, gfp_t gfp)
{
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_RADAR_DETECT);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
                goto nla_put_failure;

        /* NOP and radar events don't need a netdev parameter */
        if (netdev) {
                struct wireless_dev *wdev = netdev->ieee80211_ptr;

                if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
                    nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                                      NL80211_ATTR_PAD))
                        goto nla_put_failure;
        }

        if (nla_put_u32(msg, NL80211_ATTR_RADAR_EVENT, event))
                goto nla_put_failure;

        if (nl80211_send_chandef(msg, chandef))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}

void cfg80211_sta_opmode_change_notify(struct net_device *dev, const u8 *mac,
                                       struct sta_opmode_info *sta_opmode,
                                       gfp_t gfp)
{
        struct sk_buff *msg;
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        void *hdr;

        if (WARN_ON(!mac))
                return;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STA_OPMODE_CHANGED);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx))
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex))
                goto nla_put_failure;

        if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, mac))
                goto nla_put_failure;

        if ((sta_opmode->changed & STA_OPMODE_SMPS_MODE_CHANGED) &&
            nla_put_u8(msg, NL80211_ATTR_SMPS_MODE, sta_opmode->smps_mode))
                goto nla_put_failure;

        if ((sta_opmode->changed & STA_OPMODE_MAX_BW_CHANGED) &&
            nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, sta_opmode->bw))
                goto nla_put_failure;

        if ((sta_opmode->changed & STA_OPMODE_N_SS_CHANGED) &&
            nla_put_u8(msg, NL80211_ATTR_NSS, sta_opmode->rx_nss))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);

        return;

nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_sta_opmode_change_notify);

void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
                           u64 cookie, bool acked, s32 ack_signal,
                           bool is_valid_ack_signal, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg;
        void *hdr;

        trace_cfg80211_probe_status(dev, addr, cookie, acked);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);

        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_PROBE_CLIENT);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_COOKIE, cookie,
                              NL80211_ATTR_PAD) ||
            (acked && nla_put_flag(msg, NL80211_ATTR_ACK)) ||
            (is_valid_ack_signal && nla_put_s32(msg, NL80211_ATTR_ACK_SIGNAL,
                                                ack_signal)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_probe_status);

void cfg80211_report_obss_beacon_khz(struct wiphy *wiphy, const u8 *frame,
                                     size_t len, int freq, int sig_dbm)
{
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;
        struct cfg80211_beacon_registration *reg;

        trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);

        spin_lock_bh(&rdev->beacon_registrations_lock);
        list_for_each_entry(reg, &rdev->beacon_registrations, list) {
                msg = nlmsg_new(len + 100, GFP_ATOMIC);
                if (!msg) {
                        spin_unlock_bh(&rdev->beacon_registrations_lock);
                        return;
                }

                hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
                if (!hdr)
                        goto nla_put_failure;

                if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
                    (freq &&
                     (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
                                  KHZ_TO_MHZ(freq)) ||
                      nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_OFFSET,
                                  freq % 1000))) ||
                    (sig_dbm &&
                     nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
                    nla_put(msg, NL80211_ATTR_FRAME, len, frame))
                        goto nla_put_failure;

                genlmsg_end(msg, hdr);

                genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
        }
        spin_unlock_bh(&rdev->beacon_registrations_lock);
        return;

 nla_put_failure:
        spin_unlock_bh(&rdev->beacon_registrations_lock);
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_report_obss_beacon_khz);

#ifdef CONFIG_PM
static int cfg80211_net_detect_results(struct sk_buff *msg,
                                       struct cfg80211_wowlan_wakeup *wakeup)
{
        struct cfg80211_wowlan_nd_info *nd = wakeup->net_detect;
        struct nlattr *nl_results, *nl_match, *nl_freqs;
        int i, j;

        nl_results = nla_nest_start_noflag(msg,
                                           NL80211_WOWLAN_TRIG_NET_DETECT_RESULTS);
        if (!nl_results)
                return -EMSGSIZE;

        for (i = 0; i < nd->n_matches; i++) {
                struct cfg80211_wowlan_nd_match *match = nd->matches[i];

                nl_match = nla_nest_start_noflag(msg, i);
                if (!nl_match)
                        break;

                /* The SSID attribute is optional in nl80211, but for
                 * simplicity reasons it's always present in the
                 * cfg80211 structure.  If a driver can't pass the
                 * SSID, that needs to be changed.  A zero length SSID
                 * is still a valid SSID (wildcard), so it cannot be
                 * used for this purpose.
                 */
                if (nla_put(msg, NL80211_ATTR_SSID, match->ssid.ssid_len,
                            match->ssid.ssid)) {
                        nla_nest_cancel(msg, nl_match);
                        goto out;
                }

                if (match->n_channels) {
                        nl_freqs = nla_nest_start_noflag(msg,
                                                         NL80211_ATTR_SCAN_FREQUENCIES);
                        if (!nl_freqs) {
                                nla_nest_cancel(msg, nl_match);
                                goto out;
                        }

                        for (j = 0; j < match->n_channels; j++) {
                                if (nla_put_u32(msg, j, match->channels[j])) {
                                        nla_nest_cancel(msg, nl_freqs);
                                        nla_nest_cancel(msg, nl_match);
                                        goto out;
                                }
                        }

                        nla_nest_end(msg, nl_freqs);
                }

                nla_nest_end(msg, nl_match);
        }

out:
        nla_nest_end(msg, nl_results);
        return 0;
}

void cfg80211_report_wowlan_wakeup(struct wireless_dev *wdev,
                                   struct cfg80211_wowlan_wakeup *wakeup,
                                   gfp_t gfp)
{
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg;
        void *hdr;
        int size = 200;

        trace_cfg80211_report_wowlan_wakeup(wdev->wiphy, wdev, wakeup);

        if (wakeup)
                size += wakeup->packet_present_len;

        msg = nlmsg_new(size, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_SET_WOWLAN);
        if (!hdr)
                goto free_msg;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD))
                goto free_msg;

        if (wdev->netdev && nla_put_u32(msg, NL80211_ATTR_IFINDEX,
                                        wdev->netdev->ifindex))
                goto free_msg;

        if (wakeup) {
                struct nlattr *reasons;

                reasons = nla_nest_start_noflag(msg,
                                                NL80211_ATTR_WOWLAN_TRIGGERS);
                if (!reasons)
                        goto free_msg;

                if (wakeup->disconnect &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT))
                        goto free_msg;
                if (wakeup->magic_pkt &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT))
                        goto free_msg;
                if (wakeup->gtk_rekey_failure &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE))
                        goto free_msg;
                if (wakeup->eap_identity_req &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST))
                        goto free_msg;
                if (wakeup->four_way_handshake &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE))
                        goto free_msg;
                if (wakeup->rfkill_release &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))
                        goto free_msg;

                if (wakeup->pattern_idx >= 0 &&
                    nla_put_u32(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
                                wakeup->pattern_idx))
                        goto free_msg;

                if (wakeup->tcp_match &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_MATCH))
                        goto free_msg;

                if (wakeup->tcp_connlost &&
                    nla_put_flag(msg, NL80211_WOWLAN_TRIG_WAKEUP_TCP_CONNLOST))
                        goto free_msg;

                if (wakeup->tcp_nomoretokens &&
                    nla_put_flag(msg,
                                 NL80211_WOWLAN_TRIG_WAKEUP_TCP_NOMORETOKENS))
                        goto free_msg;

                if (wakeup->unprot_deauth_disassoc &&
                    nla_put_flag(msg,
                                 NL80211_WOWLAN_TRIG_UNPROTECTED_DEAUTH_DISASSOC))
                        goto free_msg;

                if (wakeup->packet) {
                        u32 pkt_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211;
                        u32 len_attr = NL80211_WOWLAN_TRIG_WAKEUP_PKT_80211_LEN;

                        if (!wakeup->packet_80211) {
                                pkt_attr =
                                        NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023;
                                len_attr =
                                        NL80211_WOWLAN_TRIG_WAKEUP_PKT_8023_LEN;
                        }

                        if (wakeup->packet_len &&
                            nla_put_u32(msg, len_attr, wakeup->packet_len))
                                goto free_msg;

                        if (nla_put(msg, pkt_attr, wakeup->packet_present_len,
                                    wakeup->packet))
                                goto free_msg;
                }

                if (wakeup->net_detect &&
                    cfg80211_net_detect_results(msg, wakeup))
                                goto free_msg;

                nla_nest_end(msg, reasons);
        }

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 free_msg:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_report_wowlan_wakeup);
#endif

void cfg80211_tdls_oper_request(struct net_device *dev, const u8 *peer,
                                enum nl80211_tdls_operation oper,
                                u16 reason_code, gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg;
        void *hdr;

        trace_cfg80211_tdls_oper_request(wdev->wiphy, dev, peer, oper,
                                         reason_code);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_TDLS_OPER);
        if (!hdr) {
                nlmsg_free(msg);
                return;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, oper) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer) ||
            (reason_code > 0 &&
             nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_tdls_oper_request);

static int nl80211_netlink_notify(struct notifier_block * nb,
                                  unsigned long state,
                                  void *_notify)
{
        struct netlink_notify *notify = _notify;
        struct cfg80211_registered_device *rdev;
        struct wireless_dev *wdev;
        struct cfg80211_beacon_registration *reg, *tmp;

        if (state != NETLINK_URELEASE || notify->protocol != NETLINK_GENERIC)
                return NOTIFY_DONE;

        rcu_read_lock();

        list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list) {
                struct cfg80211_sched_scan_request *sched_scan_req;

                list_for_each_entry_rcu(sched_scan_req,
                                        &rdev->sched_scan_req_list,
                                        list) {
                        if (sched_scan_req->owner_nlportid == notify->portid) {
                                sched_scan_req->nl_owner_dead = true;
                                wiphy_work_queue(&rdev->wiphy,
                                                 &rdev->sched_scan_stop_wk);
                        }
                }

                list_for_each_entry_rcu(wdev, &rdev->wiphy.wdev_list, list) {
                        cfg80211_mlme_unregister_socket(wdev, notify->portid);

                        if (wdev->owner_nlportid == notify->portid) {
                                wdev->nl_owner_dead = true;
                                schedule_work(&rdev->destroy_work);
                        } else if (wdev->conn_owner_nlportid == notify->portid) {
                                schedule_work(&wdev->disconnect_wk);
                        }

                        cfg80211_release_pmsr(wdev, notify->portid);
                }

                spin_lock_bh(&rdev->beacon_registrations_lock);
                list_for_each_entry_safe(reg, tmp, &rdev->beacon_registrations,
                                         list) {
                        if (reg->nlportid == notify->portid) {
                                list_del(&reg->list);
                                kfree(reg);
                                break;
                        }
                }
                spin_unlock_bh(&rdev->beacon_registrations_lock);
        }

        rcu_read_unlock();

        /*
         * It is possible that the user space process that is controlling the
         * indoor setting disappeared, so notify the regulatory core.
         */
        regulatory_netlink_notify(notify->portid);
        return NOTIFY_OK;
}

static struct notifier_block nl80211_netlink_notifier = {
        .notifier_call = nl80211_netlink_notify,
};

void cfg80211_ft_event(struct net_device *netdev,
                       struct cfg80211_ft_event_params *ft_event)
{
        struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        trace_cfg80211_ft_event(wiphy, netdev, ft_event);

        if (!ft_event->target_ap)
                return;

        msg = nlmsg_new(100 + ft_event->ies_len + ft_event->ric_ies_len,
                        GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FT_EVENT);
        if (!hdr)
                goto out;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, ft_event->target_ap))
                goto out;

        if (ft_event->ies &&
            nla_put(msg, NL80211_ATTR_IE, ft_event->ies_len, ft_event->ies))
                goto out;
        if (ft_event->ric_ies &&
            nla_put(msg, NL80211_ATTR_IE_RIC, ft_event->ric_ies_len,
                    ft_event->ric_ies))
                goto out;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;
 out:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_ft_event);

void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp)
{
        struct cfg80211_registered_device *rdev;
        struct sk_buff *msg;
        void *hdr;
        u32 nlportid;

        rdev = wiphy_to_rdev(wdev->wiphy);
        if (!rdev->crit_proto_nlportid)
                return;

        nlportid = rdev->crit_proto_nlportid;
        rdev->crit_proto_nlportid = 0;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_CRIT_PROTOCOL_STOP);
        if (!hdr)
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);

        genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlportid);
        return;

 nla_put_failure:
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_crit_proto_stopped);

void nl80211_send_ap_stopped(struct wireless_dev *wdev, unsigned int link_id)
{
        struct wiphy *wiphy = wdev->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_STOP_AP);
        if (!hdr)
                goto out;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, wdev->netdev->ifindex) ||
            nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
                              NL80211_ATTR_PAD) ||
            (wdev->valid_links &&
             nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id)))
                goto out;

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(wiphy), msg, 0,
                                NL80211_MCGRP_MLME, GFP_KERNEL);
        return;
 out:
        nlmsg_free(msg);
}

int cfg80211_external_auth_request(struct net_device *dev,
                                   struct cfg80211_external_auth_params *params,
                                   gfp_t gfp)
{
        struct wireless_dev *wdev = dev->ieee80211_ptr;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
        struct sk_buff *msg;
        void *hdr;

        if (!wdev->conn_owner_nlportid)
                return -EINVAL;

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return -ENOMEM;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_EXTERNAL_AUTH);
        if (!hdr)
                goto nla_put_failure;

        /* Some historical mistakes in drivers <-> userspace interface (notably
         * between drivers and wpa_supplicant) led to a big-endian conversion
         * being needed on NL80211_ATTR_AKM_SUITES _only_ when its value is
         * WLAN_AKM_SUITE_SAE. This is now fixed on userspace side, but for the
         * benefit of older wpa_supplicant versions, send this particular value
         * in big-endian. Note that newer wpa_supplicant will also detect this
         * particular value in big endian still, so it all continues to work.
         */
        if (params->key_mgmt_suite == WLAN_AKM_SUITE_SAE) {
                if (nla_put_be32(msg, NL80211_ATTR_AKM_SUITES,
                                 cpu_to_be32(WLAN_AKM_SUITE_SAE)))
                        goto nla_put_failure;
        } else {
                if (nla_put_u32(msg, NL80211_ATTR_AKM_SUITES,
                                params->key_mgmt_suite))
                        goto nla_put_failure;
        }

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, dev->ifindex) ||
            nla_put_u32(msg, NL80211_ATTR_EXTERNAL_AUTH_ACTION,
                        params->action) ||
            nla_put(msg, NL80211_ATTR_BSSID, ETH_ALEN, params->bssid) ||
            nla_put(msg, NL80211_ATTR_SSID, params->ssid.ssid_len,
                    params->ssid.ssid) ||
            (!is_zero_ether_addr(params->mld_addr) &&
             nla_put(msg, NL80211_ATTR_MLD_ADDR, ETH_ALEN, params->mld_addr)))
                goto nla_put_failure;

        genlmsg_end(msg, hdr);
        genlmsg_unicast(wiphy_net(&rdev->wiphy), msg,
                        wdev->conn_owner_nlportid);
        return 0;

 nla_put_failure:
        nlmsg_free(msg);
        return -ENOBUFS;
}
EXPORT_SYMBOL(cfg80211_external_auth_request);

void cfg80211_update_owe_info_event(struct net_device *netdev,
                                    struct cfg80211_update_owe_info *owe_info,
                                    gfp_t gfp)
{
        struct wiphy *wiphy = netdev->ieee80211_ptr->wiphy;
        struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
        struct sk_buff *msg;
        void *hdr;

        trace_cfg80211_update_owe_info_event(wiphy, netdev, owe_info);

        msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
        if (!msg)
                return;

        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_UPDATE_OWE_INFO);
        if (!hdr)
                goto nla_put_failure;

        if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, owe_info->peer))
                goto nla_put_failure;

        if (!owe_info->ie_len ||
            nla_put(msg, NL80211_ATTR_IE, owe_info->ie_len, owe_info->ie))
                goto nla_put_failure;

        if (owe_info->assoc_link_id != -1) {
                if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID,
                               owe_info->assoc_link_id))
                        goto nla_put_failure;

                if (!is_zero_ether_addr(owe_info->peer_mld_addr) &&
                    nla_put(msg, NL80211_ATTR_MLD_ADDR, ETH_ALEN,
                            owe_info->peer_mld_addr))
                        goto nla_put_failure;
        }

        genlmsg_end(msg, hdr);

        genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
                                NL80211_MCGRP_MLME, gfp);
        return;

nla_put_failure:
        genlmsg_cancel(msg, hdr);
        nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_update_owe_info_event);

void cfg80211_schedule_channels_check(struct wireless_dev *wdev)
{
        struct wiphy *wiphy = wdev->wiphy;

        /* Schedule channels check if NO_IR or DFS relaxations are supported */
        if (wdev->iftype == NL80211_IFTYPE_STATION &&
            (wiphy_ext_feature_isset(wiphy,
                                     NL80211_EXT_FEATURE_DFS_CONCURRENT) ||
            (IS_ENABLED(CONFIG_CFG80211_REG_RELAX_NO_IR) &&
             wiphy->regulatory_flags & REGULATORY_ENABLE_RELAX_NO_IR)))
                reg_check_channels();
}
EXPORT_SYMBOL(cfg80211_schedule_channels_check);

/* initialisation/exit functions */

int __init nl80211_init(void)
{
        int err;

        err = genl_register_family(&nl80211_fam);
        if (err)
                return err;

        err = netlink_register_notifier(&nl80211_netlink_notifier);
        if (err)
                goto err_out;

        return 0;
 err_out:
        genl_unregister_family(&nl80211_fam);
        return err;
}

void nl80211_exit(void)
{
        netlink_unregister_notifier(&nl80211_netlink_notifier);
        genl_unregister_family(&nl80211_fam);
}
















    2 







    2 
















































   13 






   13 





   13 






    2 
















































































































































































































































































































   14 









   14 











1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
// SPDX-License-Identifier: GPL-2.0

#include <linux/highmem.h>
#include <linux/module.h>
#include <linux/security.h>
#include <linux/slab.h>
#include <linux/types.h>

#include "sysfs.h"

/*
 * sysfs support for firmware loader
 */

void __fw_load_abort(struct fw_priv *fw_priv)
{
        /*
         * There is a small window in which user can write to 'loading'
         * between loading done/aborted and disappearance of 'loading'
         */
        if (fw_state_is_aborted(fw_priv) || fw_state_is_done(fw_priv))
                return;

        fw_state_aborted(fw_priv);
}

#ifdef CONFIG_FW_LOADER_USER_HELPER
static ssize_t timeout_show(const struct class *class, const struct class_attribute *attr,
                            char *buf)
{
        return sysfs_emit(buf, "%d\n", __firmware_loading_timeout());
}

/**
 * timeout_store() - set number of seconds to wait for firmware
 * @class: device class pointer
 * @attr: device attribute pointer
 * @buf: buffer to scan for timeout value
 * @count: number of bytes in @buf
 *
 *        Sets the number of seconds to wait for the firmware.  Once
 *        this expires an error will be returned to the driver and no
 *        firmware will be provided.
 *
 *        Note: zero means 'wait forever'.
 **/
static ssize_t timeout_store(const struct class *class, const struct class_attribute *attr,
                             const char *buf, size_t count)
{
        int tmp_loading_timeout = simple_strtol(buf, NULL, 10);

        if (tmp_loading_timeout < 0)
                tmp_loading_timeout = 0;

        __fw_fallback_set_timeout(tmp_loading_timeout);

        return count;
}
static CLASS_ATTR_RW(timeout);

static struct attribute *firmware_class_attrs[] = {
        &class_attr_timeout.attr,
        NULL,
};
ATTRIBUTE_GROUPS(firmware_class);

static int do_firmware_uevent(const struct fw_sysfs *fw_sysfs, struct kobj_uevent_env *env)
{
        if (add_uevent_var(env, "FIRMWARE=%s", fw_sysfs->fw_priv->fw_name))
                return -ENOMEM;
        if (add_uevent_var(env, "TIMEOUT=%i", __firmware_loading_timeout()))
                return -ENOMEM;
        if (add_uevent_var(env, "ASYNC=%d", fw_sysfs->nowait))
                return -ENOMEM;

        return 0;
}

static int firmware_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
        const struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
        int err = 0;

        mutex_lock(&fw_lock);
        if (fw_sysfs->fw_priv)
                err = do_firmware_uevent(fw_sysfs, env);
        mutex_unlock(&fw_lock);
        return err;
}
#endif /* CONFIG_FW_LOADER_USER_HELPER */

static void fw_dev_release(struct device *dev)
{
        struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);

        if (fw_sysfs->fw_upload_priv)
                fw_upload_free(fw_sysfs);

        kfree(fw_sysfs);
}

static struct class firmware_class = {
        .name                = "firmware",
#ifdef CONFIG_FW_LOADER_USER_HELPER
        .class_groups        = firmware_class_groups,
        .dev_uevent        = firmware_uevent,
#endif
        .dev_release        = fw_dev_release,
};

int register_sysfs_loader(void)
{
        int ret = class_register(&firmware_class);

        if (ret != 0)
                return ret;
        return register_firmware_config_sysctl();
}

void unregister_sysfs_loader(void)
{
        unregister_firmware_config_sysctl();
        class_unregister(&firmware_class);
}

static ssize_t firmware_loading_show(struct device *dev,
                                     struct device_attribute *attr, char *buf)
{
        struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
        int loading = 0;

        mutex_lock(&fw_lock);
        if (fw_sysfs->fw_priv)
                loading = fw_state_is_loading(fw_sysfs->fw_priv);
        mutex_unlock(&fw_lock);

        return sysfs_emit(buf, "%d\n", loading);
}

/**
 * firmware_loading_store() - set value in the 'loading' control file
 * @dev: device pointer
 * @attr: device attribute pointer
 * @buf: buffer to scan for loading control value
 * @count: number of bytes in @buf
 *
 *        The relevant values are:
 *
 *         1: Start a load, discarding any previous partial load.
 *         0: Conclude the load and hand the data to the driver code.
 *        -1: Conclude the load with an error and discard any written data.
 **/
static ssize_t firmware_loading_store(struct device *dev,
                                      struct device_attribute *attr,
                                      const char *buf, size_t count)
{
        struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
        struct fw_priv *fw_priv;
        ssize_t written = count;
        int loading = simple_strtol(buf, NULL, 10);

        mutex_lock(&fw_lock);
        fw_priv = fw_sysfs->fw_priv;
        if (fw_state_is_aborted(fw_priv) || fw_state_is_done(fw_priv))
                goto out;

        switch (loading) {
        case 1:
                /* discarding any previous partial load */
                fw_free_paged_buf(fw_priv);
                fw_state_start(fw_priv);
                break;
        case 0:
                if (fw_state_is_loading(fw_priv)) {
                        int rc;

                        /*
                         * Several loading requests may be pending on
                         * one same firmware buf, so let all requests
                         * see the mapped 'buf->data' once the loading
                         * is completed.
                         */
                        rc = fw_map_paged_buf(fw_priv);
                        if (rc)
                                dev_err(dev, "%s: map pages failed\n",
                                        __func__);
                        else
                                rc = security_kernel_post_load_data(fw_priv->data,
                                                                    fw_priv->size,
                                                                    LOADING_FIRMWARE,
                                                                    "blob");

                        /*
                         * Same logic as fw_load_abort, only the DONE bit
                         * is ignored and we set ABORT only on failure.
                         */
                        if (rc) {
                                fw_state_aborted(fw_priv);
                                written = rc;
                        } else {
                                fw_state_done(fw_priv);

                                /*
                                 * If this is a user-initiated firmware upload
                                 * then start the upload in a worker thread now.
                                 */
                                rc = fw_upload_start(fw_sysfs);
                                if (rc)
                                        written = rc;
                        }
                        break;
                }
                fallthrough;
        default:
                dev_err(dev, "%s: unexpected value (%d)\n", __func__, loading);
                fallthrough;
        case -1:
                fw_load_abort(fw_sysfs);
                if (fw_sysfs->fw_upload_priv)
                        fw_state_init(fw_sysfs->fw_priv);

                break;
        }
out:
        mutex_unlock(&fw_lock);
        return written;
}

DEVICE_ATTR(loading, 0644, firmware_loading_show, firmware_loading_store);

static void firmware_rw_data(struct fw_priv *fw_priv, char *buffer,
                             loff_t offset, size_t count, bool read)
{
        if (read)
                memcpy(buffer, fw_priv->data + offset, count);
        else
                memcpy(fw_priv->data + offset, buffer, count);
}

static void firmware_rw(struct fw_priv *fw_priv, char *buffer,
                        loff_t offset, size_t count, bool read)
{
        while (count) {
                int page_nr = offset >> PAGE_SHIFT;
                int page_ofs = offset & (PAGE_SIZE - 1);
                int page_cnt = min_t(size_t, PAGE_SIZE - page_ofs, count);

                if (read)
                        memcpy_from_page(buffer, fw_priv->pages[page_nr],
                                         page_ofs, page_cnt);
                else
                        memcpy_to_page(fw_priv->pages[page_nr], page_ofs,
                                       buffer, page_cnt);

                buffer += page_cnt;
                offset += page_cnt;
                count -= page_cnt;
        }
}

static ssize_t firmware_data_read(struct file *filp, struct kobject *kobj,
                                  struct bin_attribute *bin_attr,
                                  char *buffer, loff_t offset, size_t count)
{
        struct device *dev = kobj_to_dev(kobj);
        struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
        struct fw_priv *fw_priv;
        ssize_t ret_count;

        mutex_lock(&fw_lock);
        fw_priv = fw_sysfs->fw_priv;
        if (!fw_priv || fw_state_is_done(fw_priv)) {
                ret_count = -ENODEV;
                goto out;
        }
        if (offset > fw_priv->size) {
                ret_count = 0;
                goto out;
        }
        if (count > fw_priv->size - offset)
                count = fw_priv->size - offset;

        ret_count = count;

        if (fw_priv->data)
                firmware_rw_data(fw_priv, buffer, offset, count, true);
        else
                firmware_rw(fw_priv, buffer, offset, count, true);

out:
        mutex_unlock(&fw_lock);
        return ret_count;
}

static int fw_realloc_pages(struct fw_sysfs *fw_sysfs, int min_size)
{
        int err;

        err = fw_grow_paged_buf(fw_sysfs->fw_priv,
                                PAGE_ALIGN(min_size) >> PAGE_SHIFT);
        if (err)
                fw_load_abort(fw_sysfs);
        return err;
}

/**
 * firmware_data_write() - write method for firmware
 * @filp: open sysfs file
 * @kobj: kobject for the device
 * @bin_attr: bin_attr structure
 * @buffer: buffer being written
 * @offset: buffer offset for write in total data store area
 * @count: buffer size
 *
 *        Data written to the 'data' attribute will be later handed to
 *        the driver as a firmware image.
 **/
static ssize_t firmware_data_write(struct file *filp, struct kobject *kobj,
                                   struct bin_attribute *bin_attr,
                                   char *buffer, loff_t offset, size_t count)
{
        struct device *dev = kobj_to_dev(kobj);
        struct fw_sysfs *fw_sysfs = to_fw_sysfs(dev);
        struct fw_priv *fw_priv;
        ssize_t retval;

        if (!capable(CAP_SYS_RAWIO))
                return -EPERM;

        mutex_lock(&fw_lock);
        fw_priv = fw_sysfs->fw_priv;
        if (!fw_priv || fw_state_is_done(fw_priv)) {
                retval = -ENODEV;
                goto out;
        }

        if (fw_priv->data) {
                if (offset + count > fw_priv->allocated_size) {
                        retval = -ENOMEM;
                        goto out;
                }
                firmware_rw_data(fw_priv, buffer, offset, count, false);
                retval = count;
        } else {
                retval = fw_realloc_pages(fw_sysfs, offset + count);
                if (retval)
                        goto out;

                retval = count;
                firmware_rw(fw_priv, buffer, offset, count, false);
        }

        fw_priv->size = max_t(size_t, offset + count, fw_priv->size);
out:
        mutex_unlock(&fw_lock);
        return retval;
}

static struct bin_attribute firmware_attr_data = {
        .attr = { .name = "data", .mode = 0644 },
        .size = 0,
        .read = firmware_data_read,
        .write = firmware_data_write,
};

static struct attribute *fw_dev_attrs[] = {
        &dev_attr_loading.attr,
#ifdef CONFIG_FW_UPLOAD
        &dev_attr_cancel.attr,
        &dev_attr_status.attr,
        &dev_attr_error.attr,
        &dev_attr_remaining_size.attr,
#endif
        NULL
};

static struct bin_attribute *fw_dev_bin_attrs[] = {
        &firmware_attr_data,
        NULL
};

static const struct attribute_group fw_dev_attr_group = {
        .attrs = fw_dev_attrs,
        .bin_attrs = fw_dev_bin_attrs,
#ifdef CONFIG_FW_UPLOAD
        .is_visible = fw_upload_is_visible,
#endif
};

static const struct attribute_group *fw_dev_attr_groups[] = {
        &fw_dev_attr_group,
        NULL
};

struct fw_sysfs *
fw_create_instance(struct firmware *firmware, const char *fw_name,
                   struct device *device, u32 opt_flags)
{
        struct fw_sysfs *fw_sysfs;
        struct device *f_dev;

        fw_sysfs = kzalloc(sizeof(*fw_sysfs), GFP_KERNEL);
        if (!fw_sysfs) {
                fw_sysfs = ERR_PTR(-ENOMEM);
                goto exit;
        }

        fw_sysfs->nowait = !!(opt_flags & FW_OPT_NOWAIT);
        fw_sysfs->fw = firmware;
        f_dev = &fw_sysfs->dev;

        device_initialize(f_dev);
        dev_set_name(f_dev, "%s", fw_name);
        f_dev->parent = device;
        f_dev->class = &firmware_class;
        f_dev->groups = fw_dev_attr_groups;
exit:
        return fw_sysfs;
}





























   20 




   19 

   19 


    4 





    6 

    7 




   34 




    1 


    3 


   32 




   30 


    2 
    2 




   10 



   23 
   24 
   19 
    4 


   11 
   11 




   19 































   36 


    9 








   34 


   16 







   45 
    3 




   13 



   38 
   37 




   40 








   12 











    9 

   30 



   37 
   37 









1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2021 Cong Wang <cong.wang@bytedance.com> */

#include <linux/skmsg.h>
#include <linux/bpf.h>
#include <net/sock.h>
#include <net/af_unix.h>

#define unix_sk_has_data(__sk, __psock)                                        \
                ({        !skb_queue_empty(&__sk->sk_receive_queue) ||        \
                        !skb_queue_empty(&__psock->ingress_skb) ||        \
                        !list_empty(&__psock->ingress_msg);                \
                })

static int unix_msg_wait_data(struct sock *sk, struct sk_psock *psock,
                              long timeo)
{
        DEFINE_WAIT_FUNC(wait, woken_wake_function);
        struct unix_sock *u = unix_sk(sk);
        int ret = 0;

        if (sk->sk_shutdown & RCV_SHUTDOWN)
                return 1;

        if (!timeo)
                return ret;

        add_wait_queue(sk_sleep(sk), &wait);
        sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
        if (!unix_sk_has_data(sk, psock)) {
                mutex_unlock(&u->iolock);
                wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
                mutex_lock(&u->iolock);
                ret = unix_sk_has_data(sk, psock);
        }
        sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
        remove_wait_queue(sk_sleep(sk), &wait);
        return ret;
}

static int __unix_recvmsg(struct sock *sk, struct msghdr *msg,
                          size_t len, int flags)
{
        if (sk->sk_type == SOCK_DGRAM)
                return __unix_dgram_recvmsg(sk, msg, len, flags);
        else
                return __unix_stream_recvmsg(sk, msg, len, flags);
}

static int unix_bpf_recvmsg(struct sock *sk, struct msghdr *msg,
                            size_t len, int flags, int *addr_len)
{
        struct unix_sock *u = unix_sk(sk);
        struct sk_psock *psock;
        int copied;

        if (flags & MSG_OOB)
                return -EOPNOTSUPP;

        if (!len)
                return 0;

        psock = sk_psock_get(sk);
        if (unlikely(!psock))
                return __unix_recvmsg(sk, msg, len, flags);

        mutex_lock(&u->iolock);
        if (!skb_queue_empty(&sk->sk_receive_queue) &&
            sk_psock_queue_empty(psock)) {
                mutex_unlock(&u->iolock);
                sk_psock_put(sk, psock);
                return __unix_recvmsg(sk, msg, len, flags);
        }

msg_bytes_ready:
        copied = sk_msg_recvmsg(sk, psock, msg, len, flags);
        if (!copied) {
                long timeo;
                int data;

                timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
                data = unix_msg_wait_data(sk, psock, timeo);
                if (data) {
                        if (!sk_psock_queue_empty(psock))
                                goto msg_bytes_ready;
                        mutex_unlock(&u->iolock);
                        sk_psock_put(sk, psock);
                        return __unix_recvmsg(sk, msg, len, flags);
                }
                copied = -EAGAIN;
        }
        mutex_unlock(&u->iolock);
        sk_psock_put(sk, psock);
        return copied;
}

static struct proto *unix_dgram_prot_saved __read_mostly;
static DEFINE_SPINLOCK(unix_dgram_prot_lock);
static struct proto unix_dgram_bpf_prot;

static struct proto *unix_stream_prot_saved __read_mostly;
static DEFINE_SPINLOCK(unix_stream_prot_lock);
static struct proto unix_stream_bpf_prot;

static void unix_dgram_bpf_rebuild_protos(struct proto *prot, const struct proto *base)
{
        *prot        = *base;
        prot->close  = sock_map_close;
        prot->recvmsg = unix_bpf_recvmsg;
        prot->sock_is_readable = sk_msg_is_readable;
}

static void unix_stream_bpf_rebuild_protos(struct proto *prot,
                                           const struct proto *base)
{
        *prot        = *base;
        prot->close  = sock_map_close;
        prot->recvmsg = unix_bpf_recvmsg;
        prot->sock_is_readable = sk_msg_is_readable;
        prot->unhash  = sock_map_unhash;
}

static void unix_dgram_bpf_check_needs_rebuild(struct proto *ops)
{
        if (unlikely(ops != smp_load_acquire(&unix_dgram_prot_saved))) {
                spin_lock_bh(&unix_dgram_prot_lock);
                if (likely(ops != unix_dgram_prot_saved)) {
                        unix_dgram_bpf_rebuild_protos(&unix_dgram_bpf_prot, ops);
                        smp_store_release(&unix_dgram_prot_saved, ops);
                }
                spin_unlock_bh(&unix_dgram_prot_lock);
        }
}

static void unix_stream_bpf_check_needs_rebuild(struct proto *ops)
{
        if (unlikely(ops != smp_load_acquire(&unix_stream_prot_saved))) {
                spin_lock_bh(&unix_stream_prot_lock);
                if (likely(ops != unix_stream_prot_saved)) {
                        unix_stream_bpf_rebuild_protos(&unix_stream_bpf_prot, ops);
                        smp_store_release(&unix_stream_prot_saved, ops);
                }
                spin_unlock_bh(&unix_stream_prot_lock);
        }
}

int unix_dgram_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore)
{
        if (sk->sk_type != SOCK_DGRAM)
                return -EOPNOTSUPP;

        if (restore) {
                sk->sk_write_space = psock->saved_write_space;
                sock_replace_proto(sk, psock->sk_proto);
                return 0;
        }

        unix_dgram_bpf_check_needs_rebuild(psock->sk_proto);
        sock_replace_proto(sk, &unix_dgram_bpf_prot);
        return 0;
}

int unix_stream_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore)
{
        struct sock *sk_pair;

        /* Restore does not decrement the sk_pair reference yet because we must
         * keep the a reference to the socket until after an RCU grace period
         * and any pending sends have completed.
         */
        if (restore) {
                sk->sk_write_space = psock->saved_write_space;
                sock_replace_proto(sk, psock->sk_proto);
                return 0;
        }

        /* psock_update_sk_prot can be called multiple times if psock is
         * added to multiple maps and/or slots in the same map. There is
         * also an edge case where replacing a psock with itself can trigger
         * an extra psock_update_sk_prot during the insert process. So it
         * must be safe to do multiple calls. Here we need to ensure we don't
         * increment the refcnt through sock_hold many times. There will only
         * be a single matching destroy operation.
         */
        if (!psock->sk_pair) {
                sk_pair = unix_peer(sk);
                sock_hold(sk_pair);
                psock->sk_pair = sk_pair;
        }

        unix_stream_bpf_check_needs_rebuild(psock->sk_proto);
        sock_replace_proto(sk, &unix_stream_bpf_prot);
        return 0;
}

void __init unix_bpf_build_proto(void)
{
        unix_dgram_bpf_rebuild_protos(&unix_dgram_bpf_prot, &unix_dgram_proto);
        unix_stream_bpf_rebuild_protos(&unix_stream_bpf_prot, &unix_stream_proto);

}






































































































    6 






    6 





























































































































    8 






    4 





    2 













































































































    1 















































    1 





    2 







    2 

































































    8 






    8 

















    2 














































    1 
    5 













































































































    8 






























































































































































    6 






















































































    6 


































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
 */

#include <linux/fs.h>
#include <linux/module.h>
#include <linux/parser.h>
#include <linux/completion.h>
#include <linux/vfs.h>
#include <linux/quotaops.h>
#include <linux/mount.h>
#include <linux/moduleparam.h>
#include <linux/kthread.h>
#include <linux/posix_acl.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/seq_file.h>
#include <linux/blkdev.h>

#include "jfs_incore.h"
#include "jfs_filsys.h"
#include "jfs_inode.h"
#include "jfs_metapage.h"
#include "jfs_superblock.h"
#include "jfs_dmap.h"
#include "jfs_imap.h"
#include "jfs_acl.h"
#include "jfs_debug.h"
#include "jfs_xattr.h"
#include "jfs_dinode.h"

MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
MODULE_LICENSE("GPL");

static struct kmem_cache *jfs_inode_cachep;

static const struct super_operations jfs_super_operations;
static const struct export_operations jfs_export_operations;
static struct file_system_type jfs_fs_type;

#define MAX_COMMIT_THREADS 64
static int commit_threads;
module_param(commit_threads, int, 0);
MODULE_PARM_DESC(commit_threads, "Number of commit threads");

static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
struct task_struct *jfsIOthread;
struct task_struct *jfsSyncThread;

#ifdef CONFIG_JFS_DEBUG
int jfsloglevel = JFS_LOGLEVEL_WARN;
module_param(jfsloglevel, int, 0644);
MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
#endif

static void jfs_handle_error(struct super_block *sb)
{
        struct jfs_sb_info *sbi = JFS_SBI(sb);

        if (sb_rdonly(sb))
                return;

        updateSuper(sb, FM_DIRTY);

        if (sbi->flag & JFS_ERR_PANIC)
                panic("JFS (device %s): panic forced after error\n",
                        sb->s_id);
        else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
                jfs_err("ERROR: (device %s): remounting filesystem as read-only",
                        sb->s_id);
                sb->s_flags |= SB_RDONLY;
        }

        /* nothing is done for continue beyond marking the superblock dirty */
}

void jfs_error(struct super_block *sb, const char *fmt, ...)
{
        struct va_format vaf;
        va_list args;

        va_start(args, fmt);

        vaf.fmt = fmt;
        vaf.va = &args;

        pr_err("ERROR: (device %s): %ps: %pV\n",
               sb->s_id, __builtin_return_address(0), &vaf);

        va_end(args);

        jfs_handle_error(sb);
}

static struct inode *jfs_alloc_inode(struct super_block *sb)
{
        struct jfs_inode_info *jfs_inode;

        jfs_inode = alloc_inode_sb(sb, jfs_inode_cachep, GFP_NOFS);
        if (!jfs_inode)
                return NULL;
#ifdef CONFIG_QUOTA
        memset(&jfs_inode->i_dquot, 0, sizeof(jfs_inode->i_dquot));
#endif
        return &jfs_inode->vfs_inode;
}

static void jfs_free_inode(struct inode *inode)
{
        kmem_cache_free(jfs_inode_cachep, JFS_IP(inode));
}

static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
        struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
        s64 maxinodes;
        struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;

        jfs_info("In jfs_statfs");
        buf->f_type = JFS_SUPER_MAGIC;
        buf->f_bsize = sbi->bsize;
        buf->f_blocks = sbi->bmap->db_mapsize;
        buf->f_bfree = sbi->bmap->db_nfree;
        buf->f_bavail = sbi->bmap->db_nfree;
        /*
         * If we really return the number of allocated & free inodes, some
         * applications will fail because they won't see enough free inodes.
         * We'll try to calculate some guess as to how many inodes we can
         * really allocate
         *
         * buf->f_files = atomic_read(&imap->im_numinos);
         * buf->f_ffree = atomic_read(&imap->im_numfree);
         */
        maxinodes = min((s64) atomic_read(&imap->im_numinos) +
                        ((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
                         << L2INOSPEREXT), (s64) 0xffffffffLL);
        buf->f_files = maxinodes;
        buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
                                    atomic_read(&imap->im_numfree));
        buf->f_fsid.val[0] = crc32_le(0, (char *)&sbi->uuid,
                                      sizeof(sbi->uuid)/2);
        buf->f_fsid.val[1] = crc32_le(0,
                                      (char *)&sbi->uuid + sizeof(sbi->uuid)/2,
                                      sizeof(sbi->uuid)/2);

        buf->f_namelen = JFS_NAME_MAX;
        return 0;
}

#ifdef CONFIG_QUOTA
static int jfs_quota_off(struct super_block *sb, int type);
static int jfs_quota_on(struct super_block *sb, int type, int format_id,
                        const struct path *path);

static void jfs_quota_off_umount(struct super_block *sb)
{
        int type;

        for (type = 0; type < MAXQUOTAS; type++)
                jfs_quota_off(sb, type);
}

static const struct quotactl_ops jfs_quotactl_ops = {
        .quota_on        = jfs_quota_on,
        .quota_off        = jfs_quota_off,
        .quota_sync        = dquot_quota_sync,
        .get_state        = dquot_get_state,
        .set_info        = dquot_set_dqinfo,
        .get_dqblk        = dquot_get_dqblk,
        .set_dqblk        = dquot_set_dqblk,
        .get_nextdqblk        = dquot_get_next_dqblk,
};
#else
static inline void jfs_quota_off_umount(struct super_block *sb)
{
}
#endif

static void jfs_put_super(struct super_block *sb)
{
        struct jfs_sb_info *sbi = JFS_SBI(sb);
        int rc;

        jfs_info("In jfs_put_super");

        jfs_quota_off_umount(sb);

        rc = jfs_umount(sb);
        if (rc)
                jfs_err("jfs_umount failed with return code %d", rc);

        unload_nls(sbi->nls_tab);

        truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
        iput(sbi->direct_inode);

        kfree(sbi);
}

enum {
        Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
        Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
        Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask,
        Opt_discard, Opt_nodiscard, Opt_discard_minblk
};

static const match_table_t tokens = {
        {Opt_integrity, "integrity"},
        {Opt_nointegrity, "nointegrity"},
        {Opt_iocharset, "iocharset=%s"},
        {Opt_resize, "resize=%u"},
        {Opt_resize_nosize, "resize"},
        {Opt_errors, "errors=%s"},
        {Opt_ignore, "noquota"},
        {Opt_quota, "quota"},
        {Opt_usrquota, "usrquota"},
        {Opt_grpquota, "grpquota"},
        {Opt_uid, "uid=%u"},
        {Opt_gid, "gid=%u"},
        {Opt_umask, "umask=%u"},
        {Opt_discard, "discard"},
        {Opt_nodiscard, "nodiscard"},
        {Opt_discard_minblk, "discard=%u"},
        {Opt_err, NULL}
};

static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
                         int *flag)
{
        void *nls_map = (void *)-1;        /* -1: no change;  NULL: none */
        char *p;
        struct jfs_sb_info *sbi = JFS_SBI(sb);

        *newLVSize = 0;

        if (!options)
                return 1;

        while ((p = strsep(&options, ",")) != NULL) {
                substring_t args[MAX_OPT_ARGS];
                int token;
                if (!*p)
                        continue;

                token = match_token(p, tokens, args);
                switch (token) {
                case Opt_integrity:
                        *flag &= ~JFS_NOINTEGRITY;
                        break;
                case Opt_nointegrity:
                        *flag |= JFS_NOINTEGRITY;
                        break;
                case Opt_ignore:
                        /* Silently ignore the quota options */
                        /* Don't do anything ;-) */
                        break;
                case Opt_iocharset:
                        if (nls_map && nls_map != (void *) -1)
                                unload_nls(nls_map);
                        if (!strcmp(args[0].from, "none"))
                                nls_map = NULL;
                        else {
                                nls_map = load_nls(args[0].from);
                                if (!nls_map) {
                                        pr_err("JFS: charset not found\n");
                                        goto cleanup;
                                }
                        }
                        break;
                case Opt_resize:
                {
                        char *resize = args[0].from;
                        int rc = kstrtoll(resize, 0, newLVSize);

                        if (rc)
                                goto cleanup;
                        break;
                }
                case Opt_resize_nosize:
                {
                        *newLVSize = sb_bdev_nr_blocks(sb);
                        if (*newLVSize == 0)
                                pr_err("JFS: Cannot determine volume size\n");
                        break;
                }
                case Opt_errors:
                {
                        char *errors = args[0].from;
                        if (!errors || !*errors)
                                goto cleanup;
                        if (!strcmp(errors, "continue")) {
                                *flag &= ~JFS_ERR_REMOUNT_RO;
                                *flag &= ~JFS_ERR_PANIC;
                                *flag |= JFS_ERR_CONTINUE;
                        } else if (!strcmp(errors, "remount-ro")) {
                                *flag &= ~JFS_ERR_CONTINUE;
                                *flag &= ~JFS_ERR_PANIC;
                                *flag |= JFS_ERR_REMOUNT_RO;
                        } else if (!strcmp(errors, "panic")) {
                                *flag &= ~JFS_ERR_CONTINUE;
                                *flag &= ~JFS_ERR_REMOUNT_RO;
                                *flag |= JFS_ERR_PANIC;
                        } else {
                                pr_err("JFS: %s is an invalid error handler\n",
                                       errors);
                                goto cleanup;
                        }
                        break;
                }

#ifdef CONFIG_QUOTA
                case Opt_quota:
                case Opt_usrquota:
                        *flag |= JFS_USRQUOTA;
                        break;
                case Opt_grpquota:
                        *flag |= JFS_GRPQUOTA;
                        break;
#else
                case Opt_usrquota:
                case Opt_grpquota:
                case Opt_quota:
                        pr_err("JFS: quota operations not supported\n");
                        break;
#endif
                case Opt_uid:
                {
                        char *uid = args[0].from;
                        uid_t val;
                        int rc = kstrtouint(uid, 0, &val);

                        if (rc)
                                goto cleanup;
                        sbi->uid = make_kuid(current_user_ns(), val);
                        if (!uid_valid(sbi->uid))
                                goto cleanup;
                        break;
                }

                case Opt_gid:
                {
                        char *gid = args[0].from;
                        gid_t val;
                        int rc = kstrtouint(gid, 0, &val);

                        if (rc)
                                goto cleanup;
                        sbi->gid = make_kgid(current_user_ns(), val);
                        if (!gid_valid(sbi->gid))
                                goto cleanup;
                        break;
                }

                case Opt_umask:
                {
                        char *umask = args[0].from;
                        int rc = kstrtouint(umask, 8, &sbi->umask);

                        if (rc)
                                goto cleanup;
                        if (sbi->umask & ~0777) {
                                pr_err("JFS: Invalid value of umask\n");
                                goto cleanup;
                        }
                        break;
                }

                case Opt_discard:
                        /* if set to 1, even copying files will cause
                         * trimming :O
                         * -> user has more control over the online trimming
                         */
                        sbi->minblks_trim = 64;
                        if (bdev_max_discard_sectors(sb->s_bdev))
                                *flag |= JFS_DISCARD;
                        else
                                pr_err("JFS: discard option not supported on device\n");
                        break;

                case Opt_nodiscard:
                        *flag &= ~JFS_DISCARD;
                        break;

                case Opt_discard_minblk:
                {
                        char *minblks_trim = args[0].from;
                        int rc;
                        if (bdev_max_discard_sectors(sb->s_bdev)) {
                                *flag |= JFS_DISCARD;
                                rc = kstrtouint(minblks_trim, 0,
                                                &sbi->minblks_trim);
                                if (rc)
                                        goto cleanup;
                        } else
                                pr_err("JFS: discard option not supported on device\n");
                        break;
                }

                default:
                        printk("jfs: Unrecognized mount option \"%s\" or missing value\n",
                               p);
                        goto cleanup;
                }
        }

        if (nls_map != (void *) -1) {
                /* Discard old (if remount) */
                unload_nls(sbi->nls_tab);
                sbi->nls_tab = nls_map;
        }
        return 1;

cleanup:
        if (nls_map && nls_map != (void *) -1)
                unload_nls(nls_map);
        return 0;
}

static int jfs_remount(struct super_block *sb, int *flags, char *data)
{
        s64 newLVSize = 0;
        int rc = 0;
        int flag = JFS_SBI(sb)->flag;
        int ret;

        sync_filesystem(sb);
        if (!parse_options(data, sb, &newLVSize, &flag))
                return -EINVAL;

        if (newLVSize) {
                if (sb_rdonly(sb)) {
                        pr_err("JFS: resize requires volume to be mounted read-write\n");
                        return -EROFS;
                }
                rc = jfs_extendfs(sb, newLVSize, 0);
                if (rc)
                        return rc;
        }

        if (sb_rdonly(sb) && !(*flags & SB_RDONLY)) {
                /*
                 * Invalidate any previously read metadata.  fsck may have
                 * changed the on-disk data since we mounted r/o
                 */
                truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);

                JFS_SBI(sb)->flag = flag;
                ret = jfs_mount_rw(sb, 1);

                /* mark the fs r/w for quota activity */
                sb->s_flags &= ~SB_RDONLY;

                dquot_resume(sb, -1);
                return ret;
        }
        if (!sb_rdonly(sb) && (*flags & SB_RDONLY)) {
                rc = dquot_suspend(sb, -1);
                if (rc < 0)
                        return rc;
                rc = jfs_umount_rw(sb);
                JFS_SBI(sb)->flag = flag;
                return rc;
        }
        if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
                if (!sb_rdonly(sb)) {
                        rc = jfs_umount_rw(sb);
                        if (rc)
                                return rc;

                        JFS_SBI(sb)->flag = flag;
                        ret = jfs_mount_rw(sb, 1);
                        return ret;
                }
        JFS_SBI(sb)->flag = flag;

        return 0;
}

static int jfs_fill_super(struct super_block *sb, void *data, int silent)
{
        struct jfs_sb_info *sbi;
        struct inode *inode;
        int rc;
        s64 newLVSize = 0;
        int flag, ret = -EINVAL;

        jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);

        sbi = kzalloc(sizeof(struct jfs_sb_info), GFP_KERNEL);
        if (!sbi)
                return -ENOMEM;

        sb->s_fs_info = sbi;
        sb->s_max_links = JFS_LINK_MAX;
        sb->s_time_min = 0;
        sb->s_time_max = U32_MAX;
        sbi->sb = sb;
        sbi->uid = INVALID_UID;
        sbi->gid = INVALID_GID;
        sbi->umask = -1;

        /* initialize the mount flag and determine the default error handler */
        flag = JFS_ERR_REMOUNT_RO;

        if (!parse_options((char *) data, sb, &newLVSize, &flag))
                goto out_kfree;
        sbi->flag = flag;

#ifdef CONFIG_JFS_POSIX_ACL
        sb->s_flags |= SB_POSIXACL;
#endif

        if (newLVSize) {
                pr_err("resize option for remount only\n");
                goto out_kfree;
        }

        /*
         * Initialize blocksize to 4K.
         */
        sb_set_blocksize(sb, PSIZE);

        /*
         * Set method vectors.
         */
        sb->s_op = &jfs_super_operations;
        sb->s_export_op = &jfs_export_operations;
        sb->s_xattr = jfs_xattr_handlers;
#ifdef CONFIG_QUOTA
        sb->dq_op = &dquot_operations;
        sb->s_qcop = &jfs_quotactl_ops;
        sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP;
#endif

        /*
         * Initialize direct-mapping inode/address-space
         */
        inode = new_inode(sb);
        if (inode == NULL) {
                ret = -ENOMEM;
                goto out_unload;
        }
        inode->i_size = bdev_nr_bytes(sb->s_bdev);
        inode->i_mapping->a_ops = &jfs_metapage_aops;
        inode_fake_hash(inode);
        mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);

        sbi->direct_inode = inode;

        rc = jfs_mount(sb);
        if (rc) {
                if (!silent)
                        jfs_err("jfs_mount failed w/return code = %d", rc);
                goto out_mount_failed;
        }
        if (sb_rdonly(sb))
                sbi->log = NULL;
        else {
                rc = jfs_mount_rw(sb, 0);
                if (rc) {
                        if (!silent) {
                                jfs_err("jfs_mount_rw failed, return code = %d",
                                        rc);
                        }
                        goto out_no_rw;
                }
        }

        sb->s_magic = JFS_SUPER_MAGIC;

        if (sbi->mntflag & JFS_OS2)
                sb->s_d_op = &jfs_ci_dentry_operations;

        inode = jfs_iget(sb, ROOT_I);
        if (IS_ERR(inode)) {
                ret = PTR_ERR(inode);
                goto out_no_rw;
        }
        sb->s_root = d_make_root(inode);
        if (!sb->s_root)
                goto out_no_root;

        /* logical blocks are represented by 40 bits in pxd_t, etc.
         * and page cache is indexed by long
         */
        sb->s_maxbytes = min(((loff_t)sb->s_blocksize) << 40, MAX_LFS_FILESIZE);
        sb->s_time_gran = 1;
        return 0;

out_no_root:
        jfs_err("jfs_read_super: get root dentry failed");

out_no_rw:
        rc = jfs_umount(sb);
        if (rc)
                jfs_err("jfs_umount failed with return code %d", rc);
out_mount_failed:
        filemap_write_and_wait(sbi->direct_inode->i_mapping);
        truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
        make_bad_inode(sbi->direct_inode);
        iput(sbi->direct_inode);
        sbi->direct_inode = NULL;
out_unload:
        unload_nls(sbi->nls_tab);
out_kfree:
        kfree(sbi);
        return ret;
}

static int jfs_freeze(struct super_block *sb)
{
        struct jfs_sb_info *sbi = JFS_SBI(sb);
        struct jfs_log *log = sbi->log;
        int rc = 0;

        if (!sb_rdonly(sb)) {
                txQuiesce(sb);
                rc = lmLogShutdown(log);
                if (rc) {
                        jfs_error(sb, "lmLogShutdown failed\n");

                        /* let operations fail rather than hang */
                        txResume(sb);

                        return rc;
                }
                rc = updateSuper(sb, FM_CLEAN);
                if (rc) {
                        jfs_err("jfs_freeze: updateSuper failed");
                        /*
                         * Don't fail here. Everything succeeded except
                         * marking the superblock clean, so there's really
                         * no harm in leaving it frozen for now.
                         */
                }
        }
        return 0;
}

static int jfs_unfreeze(struct super_block *sb)
{
        struct jfs_sb_info *sbi = JFS_SBI(sb);
        struct jfs_log *log = sbi->log;
        int rc = 0;

        if (!sb_rdonly(sb)) {
                rc = updateSuper(sb, FM_MOUNT);
                if (rc) {
                        jfs_error(sb, "updateSuper failed\n");
                        goto out;
                }
                rc = lmLogInit(log);
                if (rc)
                        jfs_error(sb, "lmLogInit failed\n");
out:
                txResume(sb);
        }
        return rc;
}

static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
        int flags, const char *dev_name, void *data)
{
        return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super);
}

static int jfs_sync_fs(struct super_block *sb, int wait)
{
        struct jfs_log *log = JFS_SBI(sb)->log;

        /* log == NULL indicates read-only mount */
        if (log) {
                /*
                 * Write quota structures to quota file, sync_blockdev() will
                 * write them to disk later
                 */
                dquot_writeback_dquots(sb, -1);
                jfs_flush_journal(log, wait);
                jfs_syncpt(log, 0);
        }

        return 0;
}

static int jfs_show_options(struct seq_file *seq, struct dentry *root)
{
        struct jfs_sb_info *sbi = JFS_SBI(root->d_sb);

        if (uid_valid(sbi->uid))
                seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid));
        if (gid_valid(sbi->gid))
                seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid));
        if (sbi->umask != -1)
                seq_printf(seq, ",umask=%03o", sbi->umask);
        if (sbi->flag & JFS_NOINTEGRITY)
                seq_puts(seq, ",nointegrity");
        if (sbi->flag & JFS_DISCARD)
                seq_printf(seq, ",discard=%u", sbi->minblks_trim);
        if (sbi->nls_tab)
                seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset);
        if (sbi->flag & JFS_ERR_CONTINUE)
                seq_printf(seq, ",errors=continue");
        if (sbi->flag & JFS_ERR_PANIC)
                seq_printf(seq, ",errors=panic");

#ifdef CONFIG_QUOTA
        if (sbi->flag & JFS_USRQUOTA)
                seq_puts(seq, ",usrquota");

        if (sbi->flag & JFS_GRPQUOTA)
                seq_puts(seq, ",grpquota");
#endif

        return 0;
}

#ifdef CONFIG_QUOTA

/* Read data from quotafile - avoid pagecache and such because we cannot afford
 * acquiring the locks... As quota files are never truncated and quota code
 * itself serializes the operations (and no one else should touch the files)
 * we don't have to be afraid of races */
static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data,
                              size_t len, loff_t off)
{
        struct inode *inode = sb_dqopt(sb)->files[type];
        sector_t blk = off >> sb->s_blocksize_bits;
        int err = 0;
        int offset = off & (sb->s_blocksize - 1);
        int tocopy;
        size_t toread;
        struct buffer_head tmp_bh;
        struct buffer_head *bh;
        loff_t i_size = i_size_read(inode);

        if (off > i_size)
                return 0;
        if (off+len > i_size)
                len = i_size-off;
        toread = len;
        while (toread > 0) {
                tocopy = min_t(size_t, sb->s_blocksize - offset, toread);

                tmp_bh.b_state = 0;
                tmp_bh.b_size = i_blocksize(inode);
                err = jfs_get_block(inode, blk, &tmp_bh, 0);
                if (err)
                        return err;
                if (!buffer_mapped(&tmp_bh))        /* A hole? */
                        memset(data, 0, tocopy);
                else {
                        bh = sb_bread(sb, tmp_bh.b_blocknr);
                        if (!bh)
                                return -EIO;
                        memcpy(data, bh->b_data+offset, tocopy);
                        brelse(bh);
                }
                offset = 0;
                toread -= tocopy;
                data += tocopy;
                blk++;
        }
        return len;
}

/* Write to quotafile */
static ssize_t jfs_quota_write(struct super_block *sb, int type,
                               const char *data, size_t len, loff_t off)
{
        struct inode *inode = sb_dqopt(sb)->files[type];
        sector_t blk = off >> sb->s_blocksize_bits;
        int err = 0;
        int offset = off & (sb->s_blocksize - 1);
        int tocopy;
        size_t towrite = len;
        struct buffer_head tmp_bh;
        struct buffer_head *bh;

        inode_lock(inode);
        while (towrite > 0) {
                tocopy = min_t(size_t, sb->s_blocksize - offset, towrite);

                tmp_bh.b_state = 0;
                tmp_bh.b_size = i_blocksize(inode);
                err = jfs_get_block(inode, blk, &tmp_bh, 1);
                if (err)
                        goto out;
                if (offset || tocopy != sb->s_blocksize)
                        bh = sb_bread(sb, tmp_bh.b_blocknr);
                else
                        bh = sb_getblk(sb, tmp_bh.b_blocknr);
                if (!bh) {
                        err = -EIO;
                        goto out;
                }
                lock_buffer(bh);
                memcpy(bh->b_data+offset, data, tocopy);
                flush_dcache_page(bh->b_page);
                set_buffer_uptodate(bh);
                mark_buffer_dirty(bh);
                unlock_buffer(bh);
                brelse(bh);
                offset = 0;
                towrite -= tocopy;
                data += tocopy;
                blk++;
        }
out:
        if (len == towrite) {
                inode_unlock(inode);
                return err;
        }
        if (inode->i_size < off+len-towrite)
                i_size_write(inode, off+len-towrite);
        inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
        mark_inode_dirty(inode);
        inode_unlock(inode);
        return len - towrite;
}

static struct dquot __rcu **jfs_get_dquots(struct inode *inode)
{
        return JFS_IP(inode)->i_dquot;
}

static int jfs_quota_on(struct super_block *sb, int type, int format_id,
                        const struct path *path)
{
        int err;
        struct inode *inode;

        err = dquot_quota_on(sb, type, format_id, path);
        if (err)
                return err;

        inode = d_inode(path->dentry);
        inode_lock(inode);
        JFS_IP(inode)->mode2 |= JFS_NOATIME_FL | JFS_IMMUTABLE_FL;
        inode_set_flags(inode, S_NOATIME | S_IMMUTABLE,
                        S_NOATIME | S_IMMUTABLE);
        inode_unlock(inode);
        mark_inode_dirty(inode);

        return 0;
}

static int jfs_quota_off(struct super_block *sb, int type)
{
        struct inode *inode = sb_dqopt(sb)->files[type];
        int err;

        if (!inode || !igrab(inode))
                goto out;

        err = dquot_quota_off(sb, type);
        if (err)
                goto out_put;

        inode_lock(inode);
        JFS_IP(inode)->mode2 &= ~(JFS_NOATIME_FL | JFS_IMMUTABLE_FL);
        inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE);
        inode_unlock(inode);
        mark_inode_dirty(inode);
out_put:
        iput(inode);
        return err;
out:
        return dquot_quota_off(sb, type);
}
#endif

static const struct super_operations jfs_super_operations = {
        .alloc_inode        = jfs_alloc_inode,
        .free_inode        = jfs_free_inode,
        .dirty_inode        = jfs_dirty_inode,
        .write_inode        = jfs_write_inode,
        .evict_inode        = jfs_evict_inode,
        .put_super        = jfs_put_super,
        .sync_fs        = jfs_sync_fs,
        .freeze_fs        = jfs_freeze,
        .unfreeze_fs        = jfs_unfreeze,
        .statfs                = jfs_statfs,
        .remount_fs        = jfs_remount,
        .show_options        = jfs_show_options,
#ifdef CONFIG_QUOTA
        .quota_read        = jfs_quota_read,
        .quota_write        = jfs_quota_write,
        .get_dquots        = jfs_get_dquots,
#endif
};

static const struct export_operations jfs_export_operations = {
        .encode_fh        = generic_encode_ino32_fh,
        .fh_to_dentry        = jfs_fh_to_dentry,
        .fh_to_parent        = jfs_fh_to_parent,
        .get_parent        = jfs_get_parent,
};

static struct file_system_type jfs_fs_type = {
        .owner                = THIS_MODULE,
        .name                = "jfs",
        .mount                = jfs_do_mount,
        .kill_sb        = kill_block_super,
        .fs_flags        = FS_REQUIRES_DEV,
};
MODULE_ALIAS_FS("jfs");

static void init_once(void *foo)
{
        struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo;

        memset(jfs_ip, 0, sizeof(struct jfs_inode_info));
        INIT_LIST_HEAD(&jfs_ip->anon_inode_list);
        init_rwsem(&jfs_ip->rdwrlock);
        mutex_init(&jfs_ip->commit_mutex);
        init_rwsem(&jfs_ip->xattr_sem);
        spin_lock_init(&jfs_ip->ag_lock);
        jfs_ip->active_ag = -1;
        inode_init_once(&jfs_ip->vfs_inode);
}

static int __init init_jfs_fs(void)
{
        int i;
        int rc;

        jfs_inode_cachep =
            kmem_cache_create_usercopy("jfs_ip", sizeof(struct jfs_inode_info),
                        0, SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT,
                        offsetof(struct jfs_inode_info, i_inline_all),
                        sizeof_field(struct jfs_inode_info, i_inline_all),
                        init_once);
        if (jfs_inode_cachep == NULL)
                return -ENOMEM;

        /*
         * Metapage initialization
         */
        rc = metapage_init();
        if (rc) {
                jfs_err("metapage_init failed w/rc = %d", rc);
                goto free_slab;
        }

        /*
         * Transaction Manager initialization
         */
        rc = txInit();
        if (rc) {
                jfs_err("txInit failed w/rc = %d", rc);
                goto free_metapage;
        }

        /*
         * I/O completion thread (endio)
         */
        jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO");
        if (IS_ERR(jfsIOthread)) {
                rc = PTR_ERR(jfsIOthread);
                jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
                goto end_txmngr;
        }

        if (commit_threads < 1)
                commit_threads = num_online_cpus();
        if (commit_threads > MAX_COMMIT_THREADS)
                commit_threads = MAX_COMMIT_THREADS;

        for (i = 0; i < commit_threads; i++) {
                jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL,
                                                 "jfsCommit");
                if (IS_ERR(jfsCommitThread[i])) {
                        rc = PTR_ERR(jfsCommitThread[i]);
                        jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
                        commit_threads = i;
                        goto kill_committask;
                }
        }

        jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync");
        if (IS_ERR(jfsSyncThread)) {
                rc = PTR_ERR(jfsSyncThread);
                jfs_err("init_jfs_fs: fork failed w/rc = %d", rc);
                goto kill_committask;
        }

#ifdef PROC_FS_JFS
        jfs_proc_init();
#endif

        rc = register_filesystem(&jfs_fs_type);
        if (!rc)
                return 0;

#ifdef PROC_FS_JFS
        jfs_proc_clean();
#endif
        kthread_stop(jfsSyncThread);
kill_committask:
        for (i = 0; i < commit_threads; i++)
                kthread_stop(jfsCommitThread[i]);
        kthread_stop(jfsIOthread);
end_txmngr:
        txExit();
free_metapage:
        metapage_exit();
free_slab:
        kmem_cache_destroy(jfs_inode_cachep);
        return rc;
}

static void __exit exit_jfs_fs(void)
{
        int i;

        jfs_info("exit_jfs_fs called");

        txExit();
        metapage_exit();

        kthread_stop(jfsIOthread);
        for (i = 0; i < commit_threads; i++)
                kthread_stop(jfsCommitThread[i]);
        kthread_stop(jfsSyncThread);
#ifdef PROC_FS_JFS
        jfs_proc_clean();
#endif
        unregister_filesystem(&jfs_fs_type);

        /*
         * Make sure all delayed rcu free inodes are flushed before we
         * destroy cache.
         */
        rcu_barrier();
        kmem_cache_destroy(jfs_inode_cachep);
}

module_init(init_jfs_fs)
module_exit(exit_jfs_fs)






























































    3 


























































































    3 





























    3 































    3 

    3 






    3 





    3 














































    3 












































    3 



    3 
    3 
















    3 











    3 


    3 


    3 





















    3 

























































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
// SPDX-License-Identifier: GPL-2.0-only
/*
 * drivers/mfd/mfd-core.c
 *
 * core MFD support
 * Copyright (c) 2006 Ian Molton
 * Copyright (c) 2007,2008 Dmitry Baryshkov
 */

#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/list.h>
#include <linux/property.h>
#include <linux/mfd/core.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/regulator/consumer.h>

static LIST_HEAD(mfd_of_node_list);

struct mfd_of_node_entry {
        struct list_head list;
        struct device *dev;
        struct device_node *np;
};

static const struct device_type mfd_dev_type = {
        .name        = "mfd_device",
};

#if IS_ENABLED(CONFIG_ACPI)
struct match_ids_walk_data {
        struct acpi_device_id *ids;
        struct acpi_device *adev;
};

static int match_device_ids(struct acpi_device *adev, void *data)
{
        struct match_ids_walk_data *wd = data;

        if (!acpi_match_device_ids(adev, wd->ids)) {
                wd->adev = adev;
                return 1;
        }

        return 0;
}

static void mfd_acpi_add_device(const struct mfd_cell *cell,
                                struct platform_device *pdev)
{
        const struct mfd_cell_acpi_match *match = cell->acpi_match;
        struct acpi_device *adev = NULL;
        struct acpi_device *parent;

        parent = ACPI_COMPANION(pdev->dev.parent);
        if (!parent)
                return;

        /*
         * MFD child device gets its ACPI handle either from the ACPI device
         * directly under the parent that matches the either _HID or _CID, or
         * _ADR or it will use the parent handle if is no ID is given.
         *
         * Note that use of _ADR is a grey area in the ACPI specification,
         * though at least Intel Galileo Gen 2 is using it to distinguish
         * the children devices.
         */
        if (match) {
                if (match->pnpid) {
                        struct acpi_device_id ids[2] = {};
                        struct match_ids_walk_data wd = {
                                .adev = NULL,
                                .ids = ids,
                        };

                        strscpy(ids[0].id, match->pnpid, sizeof(ids[0].id));
                        acpi_dev_for_each_child(parent, match_device_ids, &wd);
                        adev = wd.adev;
                } else {
                        adev = acpi_find_child_device(parent, match->adr, false);
                }
        }

        device_set_node(&pdev->dev, acpi_fwnode_handle(adev ?: parent));
}
#else
static inline void mfd_acpi_add_device(const struct mfd_cell *cell,
                                       struct platform_device *pdev)
{
}
#endif

static int mfd_match_of_node_to_dev(struct platform_device *pdev,
                                    struct device_node *np,
                                    const struct mfd_cell *cell)
{
#if IS_ENABLED(CONFIG_OF)
        struct mfd_of_node_entry *of_entry;
        u64 of_node_addr;

        /* Skip if OF node has previously been allocated to a device */
        list_for_each_entry(of_entry, &mfd_of_node_list, list)
                if (of_entry->np == np)
                        return -EAGAIN;

        if (!cell->use_of_reg)
                /* No of_reg defined - allocate first free compatible match */
                goto allocate_of_node;

        /* We only care about each node's first defined address */
        if (of_property_read_reg(np, 0, &of_node_addr, NULL))
                /* OF node does not contatin a 'reg' property to match to */
                return -EAGAIN;

        if (cell->of_reg != of_node_addr)
                /* No match */
                return -EAGAIN;

allocate_of_node:
        of_entry = kzalloc(sizeof(*of_entry), GFP_KERNEL);
        if (!of_entry)
                return -ENOMEM;

        of_entry->dev = &pdev->dev;
        of_entry->np = np;
        list_add_tail(&of_entry->list, &mfd_of_node_list);

        device_set_node(&pdev->dev, of_fwnode_handle(np));
#endif
        return 0;
}

static int mfd_add_device(struct device *parent, int id,
                          const struct mfd_cell *cell,
                          struct resource *mem_base,
                          int irq_base, struct irq_domain *domain)
{
        struct resource *res;
        struct platform_device *pdev;
        struct device_node *np = NULL;
        struct mfd_of_node_entry *of_entry, *tmp;
        bool disabled = false;
        int ret = -ENOMEM;
        int platform_id;
        int r;

        if (id == PLATFORM_DEVID_AUTO)
                platform_id = id;
        else
                platform_id = id + cell->id;

        pdev = platform_device_alloc(cell->name, platform_id);
        if (!pdev)
                goto fail_alloc;

        pdev->mfd_cell = kmemdup(cell, sizeof(*cell), GFP_KERNEL);
        if (!pdev->mfd_cell)
                goto fail_device;

        res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
        if (!res)
                goto fail_device;

        pdev->dev.parent = parent;
        pdev->dev.type = &mfd_dev_type;
        pdev->dev.dma_mask = parent->dma_mask;
        pdev->dev.dma_parms = parent->dma_parms;
        pdev->dev.coherent_dma_mask = parent->coherent_dma_mask;

        ret = regulator_bulk_register_supply_alias(
                        &pdev->dev, cell->parent_supplies,
                        parent, cell->parent_supplies,
                        cell->num_parent_supplies);
        if (ret < 0)
                goto fail_res;

        if (IS_ENABLED(CONFIG_OF) && parent->of_node && cell->of_compatible) {
                for_each_child_of_node(parent->of_node, np) {
                        if (of_device_is_compatible(np, cell->of_compatible)) {
                                /* Skip 'disabled' devices */
                                if (!of_device_is_available(np)) {
                                        disabled = true;
                                        continue;
                                }

                                ret = mfd_match_of_node_to_dev(pdev, np, cell);
                                if (ret == -EAGAIN)
                                        continue;
                                of_node_put(np);
                                if (ret)
                                        goto fail_alias;

                                goto match;
                        }
                }

                if (disabled) {
                        /* Ignore 'disabled' devices error free */
                        ret = 0;
                        goto fail_alias;
                }

match:
                if (!pdev->dev.of_node)
                        pr_warn("%s: Failed to locate of_node [id: %d]\n",
                                cell->name, platform_id);
        }

        mfd_acpi_add_device(cell, pdev);

        if (cell->pdata_size) {
                ret = platform_device_add_data(pdev,
                                        cell->platform_data, cell->pdata_size);
                if (ret)
                        goto fail_of_entry;
        }

        if (cell->swnode) {
                ret = device_add_software_node(&pdev->dev, cell->swnode);
                if (ret)
                        goto fail_of_entry;
        }

        for (r = 0; r < cell->num_resources; r++) {
                res[r].name = cell->resources[r].name;
                res[r].flags = cell->resources[r].flags;

                /* Find out base to use */
                if ((cell->resources[r].flags & IORESOURCE_MEM) && mem_base) {
                        res[r].parent = mem_base;
                        res[r].start = mem_base->start +
                                cell->resources[r].start;
                        res[r].end = mem_base->start +
                                cell->resources[r].end;
                } else if (cell->resources[r].flags & IORESOURCE_IRQ) {
                        if (domain) {
                                /* Unable to create mappings for IRQ ranges. */
                                WARN_ON(cell->resources[r].start !=
                                        cell->resources[r].end);
                                res[r].start = res[r].end = irq_create_mapping(
                                        domain, cell->resources[r].start);
                        } else {
                                res[r].start = irq_base +
                                        cell->resources[r].start;
                                res[r].end   = irq_base +
                                        cell->resources[r].end;
                        }
                } else {
                        res[r].parent = cell->resources[r].parent;
                        res[r].start = cell->resources[r].start;
                        res[r].end   = cell->resources[r].end;
                }

                if (!cell->ignore_resource_conflicts) {
                        if (has_acpi_companion(&pdev->dev)) {
                                ret = acpi_check_resource_conflict(&res[r]);
                                if (ret)
                                        goto fail_res_conflict;
                        }
                }
        }

        ret = platform_device_add_resources(pdev, res, cell->num_resources);
        if (ret)
                goto fail_res_conflict;

        ret = platform_device_add(pdev);
        if (ret)
                goto fail_res_conflict;

        if (cell->pm_runtime_no_callbacks)
                pm_runtime_no_callbacks(&pdev->dev);

        kfree(res);

        return 0;

fail_res_conflict:
        if (cell->swnode)
                device_remove_software_node(&pdev->dev);
fail_of_entry:
        list_for_each_entry_safe(of_entry, tmp, &mfd_of_node_list, list)
                if (of_entry->dev == &pdev->dev) {
                        list_del(&of_entry->list);
                        kfree(of_entry);
                }
fail_alias:
        regulator_bulk_unregister_supply_alias(&pdev->dev,
                                               cell->parent_supplies,
                                               cell->num_parent_supplies);
fail_res:
        kfree(res);
fail_device:
        platform_device_put(pdev);
fail_alloc:
        return ret;
}

/**
 * mfd_add_devices - register child devices
 *
 * @parent:        Pointer to parent device.
 * @id:                Can be PLATFORM_DEVID_AUTO to let the Platform API take care
 *                of device numbering, or will be added to a device's cell_id.
 * @cells:        Array of (struct mfd_cell)s describing child devices.
 * @n_devs:        Number of child devices to register.
 * @mem_base:        Parent register range resource for child devices.
 * @irq_base:        Base of the range of virtual interrupt numbers allocated for
 *                this MFD device. Unused if @domain is specified.
 * @domain:        Interrupt domain to create mappings for hardware interrupts.
 */
int mfd_add_devices(struct device *parent, int id,
                    const struct mfd_cell *cells, int n_devs,
                    struct resource *mem_base,
                    int irq_base, struct irq_domain *domain)
{
        int i;
        int ret;

        for (i = 0; i < n_devs; i++) {
                ret = mfd_add_device(parent, id, cells + i, mem_base,
                                     irq_base, domain);
                if (ret)
                        goto fail;
        }

        return 0;

fail:
        if (i)
                mfd_remove_devices(parent);

        return ret;
}
EXPORT_SYMBOL(mfd_add_devices);

static int mfd_remove_devices_fn(struct device *dev, void *data)
{
        struct platform_device *pdev;
        const struct mfd_cell *cell;
        struct mfd_of_node_entry *of_entry, *tmp;
        int *level = data;

        if (dev->type != &mfd_dev_type)
                return 0;

        pdev = to_platform_device(dev);
        cell = mfd_get_cell(pdev);

        if (level && cell->level > *level)
                return 0;

        if (cell->swnode)
                device_remove_software_node(&pdev->dev);

        list_for_each_entry_safe(of_entry, tmp, &mfd_of_node_list, list)
                if (of_entry->dev == &pdev->dev) {
                        list_del(&of_entry->list);
                        kfree(of_entry);
                }

        regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
                                               cell->num_parent_supplies);

        platform_device_unregister(pdev);
        return 0;
}

void mfd_remove_devices_late(struct device *parent)
{
        int level = MFD_DEP_LEVEL_HIGH;

        device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
}
EXPORT_SYMBOL(mfd_remove_devices_late);

void mfd_remove_devices(struct device *parent)
{
        int level = MFD_DEP_LEVEL_NORMAL;

        device_for_each_child_reverse(parent, &level, mfd_remove_devices_fn);
}
EXPORT_SYMBOL(mfd_remove_devices);

static void devm_mfd_dev_release(struct device *dev, void *res)
{
        mfd_remove_devices(dev);
}

/**
 * devm_mfd_add_devices - Resource managed version of mfd_add_devices()
 *
 * Returns 0 on success or an appropriate negative error number on failure.
 * All child-devices of the MFD will automatically be removed when it gets
 * unbinded.
 *
 * @dev:        Pointer to parent device.
 * @id:                Can be PLATFORM_DEVID_AUTO to let the Platform API take care
 *                of device numbering, or will be added to a device's cell_id.
 * @cells:        Array of (struct mfd_cell)s describing child devices.
 * @n_devs:        Number of child devices to register.
 * @mem_base:        Parent register range resource for child devices.
 * @irq_base:        Base of the range of virtual interrupt numbers allocated for
 *                this MFD device. Unused if @domain is specified.
 * @domain:        Interrupt domain to create mappings for hardware interrupts.
 */
int devm_mfd_add_devices(struct device *dev, int id,
                         const struct mfd_cell *cells, int n_devs,
                         struct resource *mem_base,
                         int irq_base, struct irq_domain *domain)
{
        struct device **ptr;
        int ret;

        ptr = devres_alloc(devm_mfd_dev_release, sizeof(*ptr), GFP_KERNEL);
        if (!ptr)
                return -ENOMEM;

        ret = mfd_add_devices(dev, id, cells, n_devs, mem_base,
                              irq_base, domain);
        if (ret < 0) {
                devres_free(ptr);
                return ret;
        }

        *ptr = dev;
        devres_add(dev, ptr);

        return ret;
}
EXPORT_SYMBOL(devm_mfd_add_devices);

MODULE_DESCRIPTION("Core MFD support");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ian Molton, Dmitry Baryshkov");










































































































































 3219 













 3200 




















 3201 










 3221 



 3220 



1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
// SPDX-License-Identifier: GPL-2.0
/*
 * drivers/usb/core/endpoint.c
 *
 * (C) Copyright 2002,2004,2006 Greg Kroah-Hartman
 * (C) Copyright 2002,2004 IBM Corp.
 * (C) Copyright 2006 Novell Inc.
 *
 * Released under the GPLv2 only.
 *
 * Endpoint sysfs stuff
 */

#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include "usb.h"

struct ep_device {
        struct usb_endpoint_descriptor *desc;
        struct usb_device *udev;
        struct device dev;
};
#define to_ep_device(_dev) \
        container_of(_dev, struct ep_device, dev)

struct ep_attribute {
        struct attribute attr;
        ssize_t (*show)(struct usb_device *,
                        struct usb_endpoint_descriptor *, char *);
};
#define to_ep_attribute(_attr) \
        container_of(_attr, struct ep_attribute, attr)

#define usb_ep_attr(field, format_string)                        \
static ssize_t field##_show(struct device *dev,                        \
                               struct device_attribute *attr,        \
                               char *buf)                        \
{                                                                \
        struct ep_device *ep = to_ep_device(dev);                \
        return sprintf(buf, format_string, ep->desc->field);        \
}                                                                \
static DEVICE_ATTR_RO(field)

usb_ep_attr(bLength, "%02x\n");
usb_ep_attr(bEndpointAddress, "%02x\n");
usb_ep_attr(bmAttributes, "%02x\n");
usb_ep_attr(bInterval, "%02x\n");

static ssize_t wMaxPacketSize_show(struct device *dev,
                                   struct device_attribute *attr, char *buf)
{
        struct ep_device *ep = to_ep_device(dev);
        return sprintf(buf, "%04x\n", usb_endpoint_maxp(ep->desc));
}
static DEVICE_ATTR_RO(wMaxPacketSize);

static ssize_t type_show(struct device *dev, struct device_attribute *attr,
                         char *buf)
{
        struct ep_device *ep = to_ep_device(dev);
        char *type = "unknown";

        switch (usb_endpoint_type(ep->desc)) {
        case USB_ENDPOINT_XFER_CONTROL:
                type = "Control";
                break;
        case USB_ENDPOINT_XFER_ISOC:
                type = "Isoc";
                break;
        case USB_ENDPOINT_XFER_BULK:
                type = "Bulk";
                break;
        case USB_ENDPOINT_XFER_INT:
                type = "Interrupt";
                break;
        }
        return sprintf(buf, "%s\n", type);
}
static DEVICE_ATTR_RO(type);

static ssize_t interval_show(struct device *dev, struct device_attribute *attr,
                             char *buf)
{
        struct ep_device *ep = to_ep_device(dev);
        unsigned int interval;
        char unit;

        interval = usb_decode_interval(ep->desc, ep->udev->speed);
        if (interval % 1000) {
                unit = 'u';
        } else {
                unit = 'm';
                interval /= 1000;
        }

        return sprintf(buf, "%d%cs\n", interval, unit);
}
static DEVICE_ATTR_RO(interval);

static ssize_t direction_show(struct device *dev, struct device_attribute *attr,
                              char *buf)
{
        struct ep_device *ep = to_ep_device(dev);
        char *direction;

        if (usb_endpoint_xfer_control(ep->desc))
                direction = "both";
        else if (usb_endpoint_dir_in(ep->desc))
                direction = "in";
        else
                direction = "out";
        return sprintf(buf, "%s\n", direction);
}
static DEVICE_ATTR_RO(direction);

static struct attribute *ep_dev_attrs[] = {
        &dev_attr_bLength.attr,
        &dev_attr_bEndpointAddress.attr,
        &dev_attr_bmAttributes.attr,
        &dev_attr_bInterval.attr,
        &dev_attr_wMaxPacketSize.attr,
        &dev_attr_interval.attr,
        &dev_attr_type.attr,
        &dev_attr_direction.attr,
        NULL,
};
static const struct attribute_group ep_dev_attr_grp = {
        .attrs = ep_dev_attrs,
};
static const struct attribute_group *ep_dev_groups[] = {
        &ep_dev_attr_grp,
        NULL
};

static void ep_device_release(struct device *dev)
{
        struct ep_device *ep_dev = to_ep_device(dev);

        kfree(ep_dev);
}

const struct device_type usb_ep_device_type = {
        .name =                "usb_endpoint",
        .release = ep_device_release,
};

int usb_create_ep_devs(struct device *parent,
                        struct usb_host_endpoint *endpoint,
                        struct usb_device *udev)
{
        struct ep_device *ep_dev;
        int retval;

        ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
        if (!ep_dev) {
                retval = -ENOMEM;
                goto exit;
        }

        ep_dev->desc = &endpoint->desc;
        ep_dev->udev = udev;
        ep_dev->dev.groups = ep_dev_groups;
        ep_dev->dev.type = &usb_ep_device_type;
        ep_dev->dev.parent = parent;
        dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress);

        retval = device_register(&ep_dev->dev);
        if (retval)
                goto error_register;

        device_enable_async_suspend(&ep_dev->dev);
        endpoint->ep_dev = ep_dev;
        return retval;

error_register:
        put_device(&ep_dev->dev);
exit:
        return retval;
}

void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
{
        struct ep_device *ep_dev = endpoint->ep_dev;

        if (ep_dev) {
                device_unregister(&ep_dev->dev);
                endpoint->ep_dev = NULL;
        }
}







































  105 
























































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Common values for AES algorithms
 */

#ifndef _CRYPTO_AES_H
#define _CRYPTO_AES_H

#include <linux/types.h>
#include <linux/crypto.h>

#define AES_MIN_KEY_SIZE        16
#define AES_MAX_KEY_SIZE        32
#define AES_KEYSIZE_128                16
#define AES_KEYSIZE_192                24
#define AES_KEYSIZE_256                32
#define AES_BLOCK_SIZE                16
#define AES_MAX_KEYLENGTH        (15 * 16)
#define AES_MAX_KEYLENGTH_U32        (AES_MAX_KEYLENGTH / sizeof(u32))

/*
 * Please ensure that the first two fields are 16-byte aligned
 * relative to the start of the structure, i.e., don't move them!
 */
struct crypto_aes_ctx {
        u32 key_enc[AES_MAX_KEYLENGTH_U32];
        u32 key_dec[AES_MAX_KEYLENGTH_U32];
        u32 key_length;
};

extern const u32 crypto_ft_tab[4][256] ____cacheline_aligned;
extern const u32 crypto_it_tab[4][256] ____cacheline_aligned;

/*
 * validate key length for AES algorithms
 */
static inline int aes_check_keylen(unsigned int keylen)
{
        switch (keylen) {
        case AES_KEYSIZE_128:
        case AES_KEYSIZE_192:
        case AES_KEYSIZE_256:
                break;
        default:
                return -EINVAL;
        }

        return 0;
}

int crypto_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
                unsigned int key_len);

/**
 * aes_expandkey - Expands the AES key as described in FIPS-197
 * @ctx:        The location where the computed key will be stored.
 * @in_key:        The supplied key.
 * @key_len:        The length of the supplied key.
 *
 * Returns 0 on success. The function fails only if an invalid key size (or
 * pointer) is supplied.
 * The expanded key size is 240 bytes (max of 14 rounds with a unique 16 bytes
 * key schedule plus a 16 bytes key which is used before the first round).
 * The decryption key is prepared for the "Equivalent Inverse Cipher" as
 * described in FIPS-197. The first slot (16 bytes) of each key (enc or dec) is
 * for the initial combination, the second slot for the first round and so on.
 */
int aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
                  unsigned int key_len);

/**
 * aes_encrypt - Encrypt a single AES block
 * @ctx:        Context struct containing the key schedule
 * @out:        Buffer to store the ciphertext
 * @in:                Buffer containing the plaintext
 */
void aes_encrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in);

/**
 * aes_decrypt - Decrypt a single AES block
 * @ctx:        Context struct containing the key schedule
 * @out:        Buffer to store the plaintext
 * @in:                Buffer containing the ciphertext
 */
void aes_decrypt(const struct crypto_aes_ctx *ctx, u8 *out, const u8 *in);

extern const u8 crypto_aes_sbox[];
extern const u8 crypto_aes_inv_sbox[];

void aescfb_encrypt(const struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src,
                    int len, const u8 iv[AES_BLOCK_SIZE]);
void aescfb_decrypt(const struct crypto_aes_ctx *ctx, u8 *dst, const u8 *src,
                    int len, const u8 iv[AES_BLOCK_SIZE]);

#endif





















 5146 





  227 















    8 
































    6 














  144 



  137 


    8 


    8 

    8 
    8 




    3 











   61 


    1 





   60 






   60 
    3 


   47 














    6 







    6 






  321 



   14 










  306 



























 7139 

 7137 











 6905 





   68 






  263 
    6 






  215 

   79 
























  116 

  116 








  107 
   10 



    1 


  114 







  117 
  117 


  117 
  117 







  116 
    3 





   88 


   36 



   34 
































  243 



  210 
   54 
    3 

   51 




  243 



  243 


  243 



   20 



  119 



  117 




  243 



  241 
  242 
  241 









  242 





















  243 

  243 


  243 







  243 






    4 
   63 



  195 




















  243 

  243 

  242 

























  552 

  554 









  187 
  437 





  118 
   27 



  509 















  552 
  502 
  503 
  322 


   10 
  274 


  284 
  245 
   78 









  102 






  242 

   73 

  187 



  243 

  188 

   68 







  243 
  243 


  206 


  243 



  243 





















1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
 */

#include <linux/dcache.h>
#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/srcu.h>

#include <linux/fsnotify_backend.h>
#include "fsnotify.h"

/*
 * Clear all of the marks on an inode when it is being evicted from core
 */
void __fsnotify_inode_delete(struct inode *inode)
{
        fsnotify_clear_marks_by_inode(inode);
}
EXPORT_SYMBOL_GPL(__fsnotify_inode_delete);

void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
{
        fsnotify_clear_marks_by_mount(mnt);
}

/**
 * fsnotify_unmount_inodes - an sb is unmounting.  handle any watched inodes.
 * @sb: superblock being unmounted.
 *
 * Called during unmount with no locks held, so needs to be safe against
 * concurrent modifiers. We temporarily drop sb->s_inode_list_lock and CAN block.
 */
static void fsnotify_unmount_inodes(struct super_block *sb)
{
        struct inode *inode, *iput_inode = NULL;

        spin_lock(&sb->s_inode_list_lock);
        list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
                /*
                 * We cannot __iget() an inode in state I_FREEING,
                 * I_WILL_FREE, or I_NEW which is fine because by that point
                 * the inode cannot have any associated watches.
                 */
                spin_lock(&inode->i_lock);
                if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) {
                        spin_unlock(&inode->i_lock);
                        continue;
                }

                /*
                 * If i_count is zero, the inode cannot have any watches and
                 * doing an __iget/iput with SB_ACTIVE clear would actually
                 * evict all inodes with zero i_count from icache which is
                 * unnecessarily violent and may in fact be illegal to do.
                 * However, we should have been called /after/ evict_inodes
                 * removed all zero refcount inodes, in any case.  Test to
                 * be sure.
                 */
                if (!atomic_read(&inode->i_count)) {
                        spin_unlock(&inode->i_lock);
                        continue;
                }

                __iget(inode);
                spin_unlock(&inode->i_lock);
                spin_unlock(&sb->s_inode_list_lock);

                iput(iput_inode);

                /* for each watch, send FS_UNMOUNT and then remove it */
                fsnotify_inode(inode, FS_UNMOUNT);

                fsnotify_inode_delete(inode);

                iput_inode = inode;

                cond_resched();
                spin_lock(&sb->s_inode_list_lock);
        }
        spin_unlock(&sb->s_inode_list_lock);

        iput(iput_inode);
}

void fsnotify_sb_delete(struct super_block *sb)
{
        struct fsnotify_sb_info *sbinfo = fsnotify_sb_info(sb);

        /* Were any marks ever added to any object on this sb? */
        if (!sbinfo)
                return;

        fsnotify_unmount_inodes(sb);
        fsnotify_clear_marks_by_sb(sb);
        /* Wait for outstanding object references from connectors */
        wait_var_event(fsnotify_sb_watched_objects(sb),
                       !atomic_long_read(fsnotify_sb_watched_objects(sb)));
        WARN_ON(fsnotify_sb_has_priority_watchers(sb, FSNOTIFY_PRIO_CONTENT));
        WARN_ON(fsnotify_sb_has_priority_watchers(sb,
                                                  FSNOTIFY_PRIO_PRE_CONTENT));
}

void fsnotify_sb_free(struct super_block *sb)
{
        kfree(sb->s_fsnotify_info);
}

/*
 * Given an inode, first check if we care what happens to our children.  Inotify
 * and dnotify both tell their parents about events.  If we care about any event
 * on a child we run all of our children and set a dentry flag saying that the
 * parent cares.  Thus when an event happens on a child it can quickly tell
 * if there is a need to find a parent and send the event to the parent.
 */
void fsnotify_set_children_dentry_flags(struct inode *inode)
{
        struct dentry *alias;

        if (!S_ISDIR(inode->i_mode))
                return;

        spin_lock(&inode->i_lock);
        /* run all of the dentries associated with this inode.  Since this is a
         * directory, there damn well better only be one item on this list */
        hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {
                struct dentry *child;

                /* run all of the children of the original inode and fix their
                 * d_flags to indicate parental interest (their parent is the
                 * original inode) */
                spin_lock(&alias->d_lock);
                hlist_for_each_entry(child, &alias->d_children, d_sib) {
                        if (!child->d_inode)
                                continue;

                        spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
                        child->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
                        spin_unlock(&child->d_lock);
                }
                spin_unlock(&alias->d_lock);
        }
        spin_unlock(&inode->i_lock);
}

/*
 * Lazily clear false positive PARENT_WATCHED flag for child whose parent had
 * stopped watching children.
 */
static void fsnotify_clear_child_dentry_flag(struct inode *pinode,
                                             struct dentry *dentry)
{
        spin_lock(&dentry->d_lock);
        /*
         * d_lock is a sufficient barrier to prevent observing a non-watched
         * parent state from before the fsnotify_set_children_dentry_flags()
         * or fsnotify_update_flags() call that had set PARENT_WATCHED.
         */
        if (!fsnotify_inode_watches_children(pinode))
                dentry->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;
        spin_unlock(&dentry->d_lock);
}

/* Are inode/sb/mount interested in parent and name info with this event? */
static bool fsnotify_event_needs_parent(struct inode *inode, __u32 mnt_mask,
                                        __u32 mask)
{
        __u32 marks_mask = 0;

        /* We only send parent/name to inode/sb/mount for events on non-dir */
        if (mask & FS_ISDIR)
                return false;

        /*
         * All events that are possible on child can also may be reported with
         * parent/name info to inode/sb/mount.  Otherwise, a watching parent
         * could result in events reported with unexpected name info to sb/mount.
         */
        BUILD_BUG_ON(FS_EVENTS_POSS_ON_CHILD & ~FS_EVENTS_POSS_TO_PARENT);

        /* Did either inode/sb/mount subscribe for events with parent/name? */
        marks_mask |= fsnotify_parent_needed_mask(inode->i_fsnotify_mask);
        marks_mask |= fsnotify_parent_needed_mask(inode->i_sb->s_fsnotify_mask);
        marks_mask |= fsnotify_parent_needed_mask(mnt_mask);

        /* Did they subscribe for this event with parent/name info? */
        return mask & marks_mask;
}

/* Are there any inode/mount/sb objects that are interested in this event? */
static inline bool fsnotify_object_watched(struct inode *inode, __u32 mnt_mask,
                                           __u32 mask)
{
        __u32 marks_mask = inode->i_fsnotify_mask | mnt_mask |
                           inode->i_sb->s_fsnotify_mask;

        return mask & marks_mask & ALL_FSNOTIFY_EVENTS;
}

/*
 * Notify this dentry's parent about a child's events with child name info
 * if parent is watching or if inode/sb/mount are interested in events with
 * parent and name info.
 *
 * Notify only the child without name info if parent is not watching and
 * inode/sb/mount are not interested in events with parent and name info.
 */
int __fsnotify_parent(struct dentry *dentry, __u32 mask, const void *data,
                      int data_type)
{
        const struct path *path = fsnotify_data_path(data, data_type);
        __u32 mnt_mask = path ? real_mount(path->mnt)->mnt_fsnotify_mask : 0;
        struct inode *inode = d_inode(dentry);
        struct dentry *parent;
        bool parent_watched = dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED;
        bool parent_needed, parent_interested;
        __u32 p_mask;
        struct inode *p_inode = NULL;
        struct name_snapshot name;
        struct qstr *file_name = NULL;
        int ret = 0;

        /* Optimize the likely case of nobody watching this path */
        if (likely(!parent_watched &&
                   !fsnotify_object_watched(inode, mnt_mask, mask)))
                return 0;

        parent = NULL;
        parent_needed = fsnotify_event_needs_parent(inode, mnt_mask, mask);
        if (!parent_watched && !parent_needed)
                goto notify;

        /* Does parent inode care about events on children? */
        parent = dget_parent(dentry);
        p_inode = parent->d_inode;
        p_mask = fsnotify_inode_watches_children(p_inode);
        if (unlikely(parent_watched && !p_mask))
                fsnotify_clear_child_dentry_flag(p_inode, dentry);

        /*
         * Include parent/name in notification either if some notification
         * groups require parent info or the parent is interested in this event.
         */
        parent_interested = mask & p_mask & ALL_FSNOTIFY_EVENTS;
        if (parent_needed || parent_interested) {
                /* When notifying parent, child should be passed as data */
                WARN_ON_ONCE(inode != fsnotify_data_inode(data, data_type));

                /* Notify both parent and child with child name info */
                take_dentry_name_snapshot(&name, dentry);
                file_name = &name.name;
                if (parent_interested)
                        mask |= FS_EVENT_ON_CHILD;
        }

notify:
        ret = fsnotify(mask, data, data_type, p_inode, file_name, inode, 0);

        if (file_name)
                release_dentry_name_snapshot(&name);
        dput(parent);

        return ret;
}
EXPORT_SYMBOL_GPL(__fsnotify_parent);

static int fsnotify_handle_inode_event(struct fsnotify_group *group,
                                       struct fsnotify_mark *inode_mark,
                                       u32 mask, const void *data, int data_type,
                                       struct inode *dir, const struct qstr *name,
                                       u32 cookie)
{
        const struct path *path = fsnotify_data_path(data, data_type);
        struct inode *inode = fsnotify_data_inode(data, data_type);
        const struct fsnotify_ops *ops = group->ops;

        if (WARN_ON_ONCE(!ops->handle_inode_event))
                return 0;

        if (WARN_ON_ONCE(!inode && !dir))
                return 0;

        if ((inode_mark->flags & FSNOTIFY_MARK_FLAG_EXCL_UNLINK) &&
            path && d_unlinked(path->dentry))
                return 0;

        /* Check interest of this mark in case event was sent with two marks */
        if (!(mask & inode_mark->mask & ALL_FSNOTIFY_EVENTS))
                return 0;

        return ops->handle_inode_event(inode_mark, mask, inode, dir, name, cookie);
}

static int fsnotify_handle_event(struct fsnotify_group *group, __u32 mask,
                                 const void *data, int data_type,
                                 struct inode *dir, const struct qstr *name,
                                 u32 cookie, struct fsnotify_iter_info *iter_info)
{
        struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
        struct fsnotify_mark *parent_mark = fsnotify_iter_parent_mark(iter_info);
        int ret;

        if (WARN_ON_ONCE(fsnotify_iter_sb_mark(iter_info)) ||
            WARN_ON_ONCE(fsnotify_iter_vfsmount_mark(iter_info)))
                return 0;

        /*
         * For FS_RENAME, 'dir' is old dir and 'data' is new dentry.
         * The only ->handle_inode_event() backend that supports FS_RENAME is
         * dnotify, where it means file was renamed within same parent.
         */
        if (mask & FS_RENAME) {
                struct dentry *moved = fsnotify_data_dentry(data, data_type);

                if (dir != moved->d_parent->d_inode)
                        return 0;
        }

        if (parent_mark) {
                ret = fsnotify_handle_inode_event(group, parent_mark, mask,
                                                  data, data_type, dir, name, 0);
                if (ret)
                        return ret;
        }

        if (!inode_mark)
                return 0;

        if (mask & FS_EVENT_ON_CHILD) {
                /*
                 * Some events can be sent on both parent dir and child marks
                 * (e.g. FS_ATTRIB).  If both parent dir and child are
                 * watching, report the event once to parent dir with name (if
                 * interested) and once to child without name (if interested).
                 * The child watcher is expecting an event without a file name
                 * and without the FS_EVENT_ON_CHILD flag.
                 */
                mask &= ~FS_EVENT_ON_CHILD;
                dir = NULL;
                name = NULL;
        }

        return fsnotify_handle_inode_event(group, inode_mark, mask, data, data_type,
                                           dir, name, cookie);
}

static int send_to_group(__u32 mask, const void *data, int data_type,
                         struct inode *dir, const struct qstr *file_name,
                         u32 cookie, struct fsnotify_iter_info *iter_info)
{
        struct fsnotify_group *group = NULL;
        __u32 test_mask = (mask & ALL_FSNOTIFY_EVENTS);
        __u32 marks_mask = 0;
        __u32 marks_ignore_mask = 0;
        bool is_dir = mask & FS_ISDIR;
        struct fsnotify_mark *mark;
        int type;

        if (!iter_info->report_mask)
                return 0;

        /* clear ignored on inode modification */
        if (mask & FS_MODIFY) {
                fsnotify_foreach_iter_mark_type(iter_info, mark, type) {
                        if (!(mark->flags &
                              FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
                                mark->ignore_mask = 0;
                }
        }

        /* Are any of the group marks interested in this event? */
        fsnotify_foreach_iter_mark_type(iter_info, mark, type) {
                group = mark->group;
                marks_mask |= mark->mask;
                marks_ignore_mask |=
                        fsnotify_effective_ignore_mask(mark, is_dir, type);
        }

        pr_debug("%s: group=%p mask=%x marks_mask=%x marks_ignore_mask=%x data=%p data_type=%d dir=%p cookie=%d\n",
                 __func__, group, mask, marks_mask, marks_ignore_mask,
                 data, data_type, dir, cookie);

        if (!(test_mask & marks_mask & ~marks_ignore_mask))
                return 0;

        if (group->ops->handle_event) {
                return group->ops->handle_event(group, mask, data, data_type, dir,
                                                file_name, cookie, iter_info);
        }

        return fsnotify_handle_event(group, mask, data, data_type, dir,
                                     file_name, cookie, iter_info);
}

static struct fsnotify_mark *fsnotify_first_mark(struct fsnotify_mark_connector **connp)
{
        struct fsnotify_mark_connector *conn;
        struct hlist_node *node = NULL;

        conn = srcu_dereference(*connp, &fsnotify_mark_srcu);
        if (conn)
                node = srcu_dereference(conn->list.first, &fsnotify_mark_srcu);

        return hlist_entry_safe(node, struct fsnotify_mark, obj_list);
}

static struct fsnotify_mark *fsnotify_next_mark(struct fsnotify_mark *mark)
{
        struct hlist_node *node = NULL;

        if (mark)
                node = srcu_dereference(mark->obj_list.next,
                                        &fsnotify_mark_srcu);

        return hlist_entry_safe(node, struct fsnotify_mark, obj_list);
}

/*
 * iter_info is a multi head priority queue of marks.
 * Pick a subset of marks from queue heads, all with the same group
 * and set the report_mask to a subset of the selected marks.
 * Returns false if there are no more groups to iterate.
 */
static bool fsnotify_iter_select_report_types(
                struct fsnotify_iter_info *iter_info)
{
        struct fsnotify_group *max_prio_group = NULL;
        struct fsnotify_mark *mark;
        int type;

        /* Choose max prio group among groups of all queue heads */
        fsnotify_foreach_iter_type(type) {
                mark = iter_info->marks[type];
                if (mark &&
                    fsnotify_compare_groups(max_prio_group, mark->group) > 0)
                        max_prio_group = mark->group;
        }

        if (!max_prio_group)
                return false;

        /* Set the report mask for marks from same group as max prio group */
        iter_info->current_group = max_prio_group;
        iter_info->report_mask = 0;
        fsnotify_foreach_iter_type(type) {
                mark = iter_info->marks[type];
                if (mark && mark->group == iter_info->current_group) {
                        /*
                         * FSNOTIFY_ITER_TYPE_PARENT indicates that this inode
                         * is watching children and interested in this event,
                         * which is an event possible on child.
                         * But is *this mark* watching children?
                         */
                        if (type == FSNOTIFY_ITER_TYPE_PARENT &&
                            !(mark->mask & FS_EVENT_ON_CHILD) &&
                            !(fsnotify_ignore_mask(mark) & FS_EVENT_ON_CHILD))
                                continue;

                        fsnotify_iter_set_report_type(iter_info, type);
                }
        }

        return true;
}

/*
 * Pop from iter_info multi head queue, the marks that belong to the group of
 * current iteration step.
 */
static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
{
        struct fsnotify_mark *mark;
        int type;

        /*
         * We cannot use fsnotify_foreach_iter_mark_type() here because we
         * may need to advance a mark of type X that belongs to current_group
         * but was not selected for reporting.
         */
        fsnotify_foreach_iter_type(type) {
                mark = iter_info->marks[type];
                if (mark && mark->group == iter_info->current_group)
                        iter_info->marks[type] =
                                fsnotify_next_mark(iter_info->marks[type]);
        }
}

/*
 * fsnotify - This is the main call to fsnotify.
 *
 * The VFS calls into hook specific functions in linux/fsnotify.h.
 * Those functions then in turn call here.  Here will call out to all of the
 * registered fsnotify_group.  Those groups can then use the notification event
 * in whatever means they feel necessary.
 *
 * @mask:        event type and flags
 * @data:        object that event happened on
 * @data_type:        type of object for fanotify_data_XXX() accessors
 * @dir:        optional directory associated with event -
 *                if @file_name is not NULL, this is the directory that
 *                @file_name is relative to
 * @file_name:        optional file name associated with event
 * @inode:        optional inode associated with event -
 *                If @dir and @inode are both non-NULL, event may be
 *                reported to both.
 * @cookie:        inotify rename cookie
 */
int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
             const struct qstr *file_name, struct inode *inode, u32 cookie)
{
        const struct path *path = fsnotify_data_path(data, data_type);
        struct super_block *sb = fsnotify_data_sb(data, data_type);
        struct fsnotify_sb_info *sbinfo = fsnotify_sb_info(sb);
        struct fsnotify_iter_info iter_info = {};
        struct mount *mnt = NULL;
        struct inode *inode2 = NULL;
        struct dentry *moved;
        int inode2_type;
        int ret = 0;
        __u32 test_mask, marks_mask;

        if (path)
                mnt = real_mount(path->mnt);

        if (!inode) {
                /* Dirent event - report on TYPE_INODE to dir */
                inode = dir;
                /* For FS_RENAME, inode is old_dir and inode2 is new_dir */
                if (mask & FS_RENAME) {
                        moved = fsnotify_data_dentry(data, data_type);
                        inode2 = moved->d_parent->d_inode;
                        inode2_type = FSNOTIFY_ITER_TYPE_INODE2;
                }
        } else if (mask & FS_EVENT_ON_CHILD) {
                /*
                 * Event on child - report on TYPE_PARENT to dir if it is
                 * watching children and on TYPE_INODE to child.
                 */
                inode2 = dir;
                inode2_type = FSNOTIFY_ITER_TYPE_PARENT;
        }

        /*
         * Optimization: srcu_read_lock() has a memory barrier which can
         * be expensive.  It protects walking the *_fsnotify_marks lists.
         * However, if we do not walk the lists, we do not have to do
         * SRCU because we have no references to any objects and do not
         * need SRCU to keep them "alive".
         */
        if ((!sbinfo || !sbinfo->sb_marks) &&
            (!mnt || !mnt->mnt_fsnotify_marks) &&
            (!inode || !inode->i_fsnotify_marks) &&
            (!inode2 || !inode2->i_fsnotify_marks))
                return 0;

        marks_mask = sb->s_fsnotify_mask;
        if (mnt)
                marks_mask |= mnt->mnt_fsnotify_mask;
        if (inode)
                marks_mask |= inode->i_fsnotify_mask;
        if (inode2)
                marks_mask |= inode2->i_fsnotify_mask;


        /*
         * If this is a modify event we may need to clear some ignore masks.
         * In that case, the object with ignore masks will have the FS_MODIFY
         * event in its mask.
         * Otherwise, return if none of the marks care about this type of event.
         */
        test_mask = (mask & ALL_FSNOTIFY_EVENTS);
        if (!(test_mask & marks_mask))
                return 0;

        iter_info.srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);

        if (sbinfo) {
                iter_info.marks[FSNOTIFY_ITER_TYPE_SB] =
                        fsnotify_first_mark(&sbinfo->sb_marks);
        }
        if (mnt) {
                iter_info.marks[FSNOTIFY_ITER_TYPE_VFSMOUNT] =
                        fsnotify_first_mark(&mnt->mnt_fsnotify_marks);
        }
        if (inode) {
                iter_info.marks[FSNOTIFY_ITER_TYPE_INODE] =
                        fsnotify_first_mark(&inode->i_fsnotify_marks);
        }
        if (inode2) {
                iter_info.marks[inode2_type] =
                        fsnotify_first_mark(&inode2->i_fsnotify_marks);
        }

        /*
         * We need to merge inode/vfsmount/sb mark lists so that e.g. inode mark
         * ignore masks are properly reflected for mount/sb mark notifications.
         * That's why this traversal is so complicated...
         */
        while (fsnotify_iter_select_report_types(&iter_info)) {
                ret = send_to_group(mask, data, data_type, dir, file_name,
                                    cookie, &iter_info);

                if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS))
                        goto out;

                fsnotify_iter_next(&iter_info);
        }
        ret = 0;
out:
        srcu_read_unlock(&fsnotify_mark_srcu, iter_info.srcu_idx);

        return ret;
}
EXPORT_SYMBOL_GPL(fsnotify);

static __init int fsnotify_init(void)
{
        int ret;

        BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_BITS) != 23);

        ret = init_srcu_struct(&fsnotify_mark_srcu);
        if (ret)
                panic("initializing fsnotify_mark_srcu");

        fsnotify_mark_connector_cachep = KMEM_CACHE(fsnotify_mark_connector,
                                                    SLAB_PANIC);

        return 0;
}
core_initcall(fsnotify_init);





































































































































































































































































































































































   12 





   11 











    1 






































   11 





   11 





















































    1 





    1 


    1 



    1 












































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2001 Jean-Fredric Clere, Nikolas Zimmermann, Georg Acher
 *                      Mark Cave-Ayland, Carlo E Prelz, Dick Streefland
 * Copyright (c) 2002, 2003 Tuukka Toivonen
 * Copyright (c) 2008 Erik Andrén
 * Copyright (c) 2008 Chia-I Wu
 *
 * P/N 861037:      Sensor HDCS1000        ASIC STV0600
 * P/N 861050-0010: Sensor HDCS1000        ASIC STV0600
 * P/N 861050-0020: Sensor Photobit PB100  ASIC STV0600-1 - QuickCam Express
 * P/N 861055:      Sensor ST VV6410       ASIC STV0610   - LEGO cam
 * P/N 861075-0040: Sensor HDCS1000        ASIC
 * P/N 961179-0700: Sensor ST VV6410       ASIC STV0602   - Dexxa WebCam USB
 * P/N 861040-0000: Sensor ST VV6410       ASIC STV0610   - QuickCam Web
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include "stv06xx_hdcs.h"

static struct v4l2_pix_format hdcs1x00_mode[] = {
        {
                HDCS_1X00_DEF_WIDTH,
                HDCS_1X00_DEF_HEIGHT,
                V4L2_PIX_FMT_SGRBG8,
                V4L2_FIELD_NONE,
                .sizeimage =
                        HDCS_1X00_DEF_WIDTH * HDCS_1X00_DEF_HEIGHT,
                .bytesperline = HDCS_1X00_DEF_WIDTH,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 1
        }
};

static struct v4l2_pix_format hdcs1020_mode[] = {
        {
                HDCS_1020_DEF_WIDTH,
                HDCS_1020_DEF_HEIGHT,
                V4L2_PIX_FMT_SGRBG8,
                V4L2_FIELD_NONE,
                .sizeimage =
                        HDCS_1020_DEF_WIDTH * HDCS_1020_DEF_HEIGHT,
                .bytesperline = HDCS_1020_DEF_WIDTH,
                .colorspace = V4L2_COLORSPACE_SRGB,
                .priv = 1
        }
};

enum hdcs_power_state {
        HDCS_STATE_SLEEP,
        HDCS_STATE_IDLE,
        HDCS_STATE_RUN
};

/* no lock? */
struct hdcs {
        enum hdcs_power_state state;
        int w, h;

        /* visible area of the sensor array */
        struct {
                int left, top;
                int width, height;
                int border;
        } array;

        struct {
                /* Column timing overhead */
                u8 cto;
                /* Column processing overhead */
                u8 cpo;
                /* Row sample period constant */
                u16 rs;
                /* Exposure reset duration */
                u16 er;
        } exp;

        int psmp;
};

static int hdcs_reg_write_seq(struct sd *sd, u8 reg, u8 *vals, u8 len)
{
        u8 regs[I2C_MAX_BYTES * 2];
        int i;

        if (unlikely((len <= 0) || (len >= I2C_MAX_BYTES) ||
                     (reg + len > 0xff)))
                return -EINVAL;

        for (i = 0; i < len; i++) {
                regs[2 * i] = reg;
                regs[2 * i + 1] = vals[i];
                /* All addresses are shifted left one bit
                 * as bit 0 toggles r/w */
                reg += 2;
        }

        return stv06xx_write_sensor_bytes(sd, regs, len);
}

static int hdcs_set_state(struct sd *sd, enum hdcs_power_state state)
{
        struct hdcs *hdcs = sd->sensor_priv;
        u8 val;
        int ret;

        if (hdcs->state == state)
                return 0;

        /* we need to go idle before running or sleeping */
        if (hdcs->state != HDCS_STATE_IDLE) {
                ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
                if (ret)
                        return ret;
        }

        hdcs->state = HDCS_STATE_IDLE;

        if (state == HDCS_STATE_IDLE)
                return 0;

        switch (state) {
        case HDCS_STATE_SLEEP:
                val = HDCS_SLEEP_MODE;
                break;

        case HDCS_STATE_RUN:
                val = HDCS_RUN_ENABLE;
                break;

        default:
                return -EINVAL;
        }

        ret = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), val);

        /* Update the state if the write succeeded */
        if (!ret)
                hdcs->state = state;

        return ret;
}

static int hdcs_reset(struct sd *sd)
{
        struct hdcs *hdcs = sd->sensor_priv;
        int err;

        err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 1);
        if (err < 0)
                return err;

        err = stv06xx_write_sensor(sd, HDCS_REG_CONTROL(sd), 0);
        if (err < 0)
                hdcs->state = HDCS_STATE_IDLE;

        return err;
}

static int hdcs_set_exposure(struct gspca_dev *gspca_dev, __s32 val)
{
        struct sd *sd = (struct sd *) gspca_dev;
        struct hdcs *hdcs = sd->sensor_priv;
        int rowexp, srowexp;
        int max_srowexp;
        /* Column time period */
        int ct;
        /* Column processing period */
        int cp;
        /* Row processing period */
        int rp;
        /* Minimum number of column timing periods
           within the column processing period */
        int mnct;
        int cycles, err;
        u8 exp[14];

        cycles = val * HDCS_CLK_FREQ_MHZ * 257;

        ct = hdcs->exp.cto + hdcs->psmp + (HDCS_ADC_START_SIG_DUR + 2);
        cp = hdcs->exp.cto + (hdcs->w * ct / 2);

        /* the cycles one row takes */
        rp = hdcs->exp.rs + cp;

        rowexp = cycles / rp;

        /* the remaining cycles */
        cycles -= rowexp * rp;

        /* calculate sub-row exposure */
        if (IS_1020(sd)) {
                /* see HDCS-1020 datasheet 3.5.6.4, p. 63 */
                srowexp = hdcs->w - (cycles + hdcs->exp.er + 13) / ct;

                mnct = (hdcs->exp.er + 12 + ct - 1) / ct;
                max_srowexp = hdcs->w - mnct;
        } else {
                /* see HDCS-1000 datasheet 3.4.5.5, p. 61 */
                srowexp = cp - hdcs->exp.er - 6 - cycles;

                mnct = (hdcs->exp.er + 5 + ct - 1) / ct;
                max_srowexp = cp - mnct * ct - 1;
        }

        if (srowexp < 0)
                srowexp = 0;
        else if (srowexp > max_srowexp)
                srowexp = max_srowexp;

        if (IS_1020(sd)) {
                exp[0] = HDCS20_CONTROL;
                exp[1] = 0x00;                /* Stop streaming */
                exp[2] = HDCS_ROWEXPL;
                exp[3] = rowexp & 0xff;
                exp[4] = HDCS_ROWEXPH;
                exp[5] = rowexp >> 8;
                exp[6] = HDCS20_SROWEXP;
                exp[7] = (srowexp >> 2) & 0xff;
                exp[8] = HDCS20_ERROR;
                exp[9] = 0x10;                /* Clear exposure error flag*/
                exp[10] = HDCS20_CONTROL;
                exp[11] = 0x04;                /* Restart streaming */
                err = stv06xx_write_sensor_bytes(sd, exp, 6);
        } else {
                exp[0] = HDCS00_CONTROL;
                exp[1] = 0x00;         /* Stop streaming */
                exp[2] = HDCS_ROWEXPL;
                exp[3] = rowexp & 0xff;
                exp[4] = HDCS_ROWEXPH;
                exp[5] = rowexp >> 8;
                exp[6] = HDCS00_SROWEXPL;
                exp[7] = srowexp & 0xff;
                exp[8] = HDCS00_SROWEXPH;
                exp[9] = srowexp >> 8;
                exp[10] = HDCS_STATUS;
                exp[11] = 0x10;         /* Clear exposure error flag*/
                exp[12] = HDCS00_CONTROL;
                exp[13] = 0x04;         /* Restart streaming */
                err = stv06xx_write_sensor_bytes(sd, exp, 7);
                if (err < 0)
                        return err;
        }
        gspca_dbg(gspca_dev, D_CONF, "Writing exposure %d, rowexp %d, srowexp %d\n",
                  val, rowexp, srowexp);
        return err;
}

static int hdcs_set_gains(struct sd *sd, u8 g)
{
        int err;
        u8 gains[4];

        /* the voltage gain Av = (1 + 19 * val / 127) * (1 + bit7) */
        if (g > 127)
                g = 0x80 | (g / 2);

        gains[0] = g;
        gains[1] = g;
        gains[2] = g;
        gains[3] = g;

        err = hdcs_reg_write_seq(sd, HDCS_ERECPGA, gains, 4);
        return err;
}

static int hdcs_set_gain(struct gspca_dev *gspca_dev, __s32 val)
{
        gspca_dbg(gspca_dev, D_CONF, "Writing gain %d\n", val);
        return hdcs_set_gains((struct sd *) gspca_dev,
                               val & 0xff);
}

static int hdcs_set_size(struct sd *sd,
                unsigned int width, unsigned int height)
{
        struct hdcs *hdcs = sd->sensor_priv;
        u8 win[4];
        unsigned int x, y;
        int err;

        /* must be multiple of 4 */
        width = (width + 3) & ~0x3;
        height = (height + 3) & ~0x3;

        if (width > hdcs->array.width)
                width = hdcs->array.width;

        if (IS_1020(sd)) {
                /* the borders are also invalid */
                if (height + 2 * hdcs->array.border + HDCS_1020_BOTTOM_Y_SKIP
                                  > hdcs->array.height)
                        height = hdcs->array.height - 2 * hdcs->array.border -
                                HDCS_1020_BOTTOM_Y_SKIP;

                y = (hdcs->array.height - HDCS_1020_BOTTOM_Y_SKIP - height) / 2
                                + hdcs->array.top;
        } else {
                if (height > hdcs->array.height)
                        height = hdcs->array.height;

                y = hdcs->array.top + (hdcs->array.height - height) / 2;
        }

        x = hdcs->array.left + (hdcs->array.width - width) / 2;

        win[0] = y / 4;
        win[1] = x / 4;
        win[2] = (y + height) / 4 - 1;
        win[3] = (x + width) / 4 - 1;

        err = hdcs_reg_write_seq(sd, HDCS_FWROW, win, 4);
        if (err < 0)
                return err;

        /* Update the current width and height */
        hdcs->w = width;
        hdcs->h = height;
        return err;
}

static int hdcs_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct gspca_dev *gspca_dev =
                container_of(ctrl->handler, struct gspca_dev, ctrl_handler);
        int err = -EINVAL;

        switch (ctrl->id) {
        case V4L2_CID_GAIN:
                err = hdcs_set_gain(gspca_dev, ctrl->val);
                break;
        case V4L2_CID_EXPOSURE:
                err = hdcs_set_exposure(gspca_dev, ctrl->val);
                break;
        }
        return err;
}

static const struct v4l2_ctrl_ops hdcs_ctrl_ops = {
        .s_ctrl = hdcs_s_ctrl,
};

static int hdcs_init_controls(struct sd *sd)
{
        struct v4l2_ctrl_handler *hdl = &sd->gspca_dev.ctrl_handler;

        v4l2_ctrl_handler_init(hdl, 2);
        v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops,
                        V4L2_CID_EXPOSURE, 0, 0xff, 1, HDCS_DEFAULT_EXPOSURE);
        v4l2_ctrl_new_std(hdl, &hdcs_ctrl_ops,
                        V4L2_CID_GAIN, 0, 0xff, 1, HDCS_DEFAULT_GAIN);
        return hdl->error;
}

static int hdcs_probe_1x00(struct sd *sd)
{
        struct hdcs *hdcs;
        u16 sensor;
        int ret;

        ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
        if (ret < 0 || sensor != 0x08)
                return -ENODEV;

        pr_info("HDCS-1000/1100 sensor detected\n");

        sd->gspca_dev.cam.cam_mode = hdcs1x00_mode;
        sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1x00_mode);

        hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
        if (!hdcs)
                return -ENOMEM;

        hdcs->array.left = 8;
        hdcs->array.top = 8;
        hdcs->array.width = HDCS_1X00_DEF_WIDTH;
        hdcs->array.height = HDCS_1X00_DEF_HEIGHT;
        hdcs->array.border = 4;

        hdcs->exp.cto = 4;
        hdcs->exp.cpo = 2;
        hdcs->exp.rs = 186;
        hdcs->exp.er = 100;

        /*
         * Frame rate on HDCS-1000 with STV600 depends on PSMP:
         *  4 = doesn't work at all
         *  5 = 7.8 fps,
         *  6 = 6.9 fps,
         *  8 = 6.3 fps,
         * 10 = 5.5 fps,
         * 15 = 4.4 fps,
         * 31 = 2.8 fps
         *
         * Frame rate on HDCS-1000 with STV602 depends on PSMP:
         * 15 = doesn't work at all
         * 18 = doesn't work at all
         * 19 = 7.3 fps
         * 20 = 7.4 fps
         * 21 = 7.4 fps
         * 22 = 7.4 fps
         * 24 = 6.3 fps
         * 30 = 5.4 fps
         */
        hdcs->psmp = (sd->bridge == BRIDGE_STV602) ? 20 : 5;

        sd->sensor_priv = hdcs;

        return 0;
}

static int hdcs_probe_1020(struct sd *sd)
{
        struct hdcs *hdcs;
        u16 sensor;
        int ret;

        ret = stv06xx_read_sensor(sd, HDCS_IDENT, &sensor);
        if (ret < 0 || sensor != 0x10)
                return -ENODEV;

        pr_info("HDCS-1020 sensor detected\n");

        sd->gspca_dev.cam.cam_mode = hdcs1020_mode;
        sd->gspca_dev.cam.nmodes = ARRAY_SIZE(hdcs1020_mode);

        hdcs = kmalloc(sizeof(struct hdcs), GFP_KERNEL);
        if (!hdcs)
                return -ENOMEM;

        /*
         * From Andrey's test image: looks like HDCS-1020 upper-left
         * visible pixel is at 24,8 (y maybe even smaller?) and lower-right
         * visible pixel at 375,299 (x maybe even larger?)
         */
        hdcs->array.left = 24;
        hdcs->array.top  = 4;
        hdcs->array.width = HDCS_1020_DEF_WIDTH;
        hdcs->array.height = 304;
        hdcs->array.border = 4;

        hdcs->psmp = 6;

        hdcs->exp.cto = 3;
        hdcs->exp.cpo = 3;
        hdcs->exp.rs = 155;
        hdcs->exp.er = 96;

        sd->sensor_priv = hdcs;

        return 0;
}

static int hdcs_start(struct sd *sd)
{
        struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;

        gspca_dbg(gspca_dev, D_STREAM, "Starting stream\n");

        return hdcs_set_state(sd, HDCS_STATE_RUN);
}

static int hdcs_stop(struct sd *sd)
{
        struct gspca_dev *gspca_dev = (struct gspca_dev *)sd;

        gspca_dbg(gspca_dev, D_STREAM, "Halting stream\n");

        return hdcs_set_state(sd, HDCS_STATE_SLEEP);
}

static int hdcs_init(struct sd *sd)
{
        struct hdcs *hdcs = sd->sensor_priv;
        int i, err = 0;

        /* Set the STV0602AA in STV0600 emulation mode */
        if (sd->bridge == BRIDGE_STV602)
                stv06xx_write_bridge(sd, STV_STV0600_EMULATION, 1);

        /* Execute the bridge init */
        for (i = 0; i < ARRAY_SIZE(stv_bridge_init) && !err; i++) {
                err = stv06xx_write_bridge(sd, stv_bridge_init[i][0],
                                           stv_bridge_init[i][1]);
        }
        if (err < 0)
                return err;

        /* sensor soft reset */
        hdcs_reset(sd);

        /* Execute the sensor init */
        for (i = 0; i < ARRAY_SIZE(stv_sensor_init) && !err; i++) {
                err = stv06xx_write_sensor(sd, stv_sensor_init[i][0],
                                             stv_sensor_init[i][1]);
        }
        if (err < 0)
                return err;

        /* Enable continuous frame capture, bit 2: stop when frame complete */
        err = stv06xx_write_sensor(sd, HDCS_REG_CONFIG(sd), BIT(3));
        if (err < 0)
                return err;

        /* Set PGA sample duration
        (was 0x7E for the STV602, but caused slow framerate with HDCS-1020) */
        if (IS_1020(sd))
                err = stv06xx_write_sensor(sd, HDCS_TCTRL,
                                (HDCS_ADC_START_SIG_DUR << 6) | hdcs->psmp);
        else
                err = stv06xx_write_sensor(sd, HDCS_TCTRL,
                                (HDCS_ADC_START_SIG_DUR << 5) | hdcs->psmp);
        if (err < 0)
                return err;

        return hdcs_set_size(sd, hdcs->array.width, hdcs->array.height);
}

static int hdcs_dump(struct sd *sd)
{
        u16 reg, val;

        pr_info("Dumping sensor registers:\n");

        for (reg = HDCS_IDENT; reg <= HDCS_ROWEXPH; reg++) {
                stv06xx_read_sensor(sd, reg, &val);
                pr_info("reg 0x%02x = 0x%02x\n", reg, val);
        }
        return 0;
}

























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































   10 










   10 


    1 

    1 


    2 




    2 

    4 


    3 



    1 




























































































































































































































































































































































































































































 2324 


 2325 

  412 




























1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2008-2011, Intel Corporation.
 *
 * Description: Data Center Bridging netlink interface
 * Author: Lucy Liu <lucy.liu@intel.com>
 */

#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/slab.h>
#include <net/netlink.h>
#include <net/rtnetlink.h>
#include <linux/dcbnl.h>
#include <net/dcbevent.h>
#include <linux/rtnetlink.h>
#include <linux/init.h>
#include <net/sock.h>

/* Data Center Bridging (DCB) is a collection of Ethernet enhancements
 * intended to allow network traffic with differing requirements
 * (highly reliable, no drops vs. best effort vs. low latency) to operate
 * and co-exist on Ethernet.  Current DCB features are:
 *
 * Enhanced Transmission Selection (aka Priority Grouping [PG]) - provides a
 *   framework for assigning bandwidth guarantees to traffic classes.
 *
 * Priority-based Flow Control (PFC) - provides a flow control mechanism which
 *   can work independently for each 802.1p priority.
 *
 * Congestion Notification - provides a mechanism for end-to-end congestion
 *   control for protocols which do not have built-in congestion management.
 *
 * More information about the emerging standards for these Ethernet features
 * can be found at: http://www.ieee802.org/1/pages/dcbridges.html
 *
 * This file implements an rtnetlink interface to allow configuration of DCB
 * features for capable devices.
 */

/**************** DCB attribute policies *************************************/

/* DCB netlink attributes policy */
static const struct nla_policy dcbnl_rtnl_policy[DCB_ATTR_MAX + 1] = {
        [DCB_ATTR_IFNAME]      = {.type = NLA_NUL_STRING, .len = IFNAMSIZ - 1},
        [DCB_ATTR_STATE]       = {.type = NLA_U8},
        [DCB_ATTR_PFC_CFG]     = {.type = NLA_NESTED},
        [DCB_ATTR_PG_CFG]      = {.type = NLA_NESTED},
        [DCB_ATTR_SET_ALL]     = {.type = NLA_U8},
        [DCB_ATTR_PERM_HWADDR] = {.type = NLA_FLAG},
        [DCB_ATTR_CAP]         = {.type = NLA_NESTED},
        [DCB_ATTR_PFC_STATE]   = {.type = NLA_U8},
        [DCB_ATTR_BCN]         = {.type = NLA_NESTED},
        [DCB_ATTR_APP]         = {.type = NLA_NESTED},
        [DCB_ATTR_IEEE]               = {.type = NLA_NESTED},
        [DCB_ATTR_DCBX]        = {.type = NLA_U8},
        [DCB_ATTR_FEATCFG]     = {.type = NLA_NESTED},
};

/* DCB priority flow control to User Priority nested attributes */
static const struct nla_policy dcbnl_pfc_up_nest[DCB_PFC_UP_ATTR_MAX + 1] = {
        [DCB_PFC_UP_ATTR_0]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_1]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_2]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_3]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_4]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_5]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_6]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_7]   = {.type = NLA_U8},
        [DCB_PFC_UP_ATTR_ALL] = {.type = NLA_FLAG},
};

/* DCB priority grouping nested attributes */
static const struct nla_policy dcbnl_pg_nest[DCB_PG_ATTR_MAX + 1] = {
        [DCB_PG_ATTR_TC_0]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_1]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_2]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_3]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_4]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_5]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_6]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_7]      = {.type = NLA_NESTED},
        [DCB_PG_ATTR_TC_ALL]    = {.type = NLA_NESTED},
        [DCB_PG_ATTR_BW_ID_0]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_1]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_2]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_3]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_4]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_5]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_6]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_7]   = {.type = NLA_U8},
        [DCB_PG_ATTR_BW_ID_ALL] = {.type = NLA_FLAG},
};

/* DCB traffic class nested attributes. */
static const struct nla_policy dcbnl_tc_param_nest[DCB_TC_ATTR_PARAM_MAX + 1] = {
        [DCB_TC_ATTR_PARAM_PGID]            = {.type = NLA_U8},
        [DCB_TC_ATTR_PARAM_UP_MAPPING]      = {.type = NLA_U8},
        [DCB_TC_ATTR_PARAM_STRICT_PRIO]     = {.type = NLA_U8},
        [DCB_TC_ATTR_PARAM_BW_PCT]          = {.type = NLA_U8},
        [DCB_TC_ATTR_PARAM_ALL]             = {.type = NLA_FLAG},
};

/* DCB capabilities nested attributes. */
static const struct nla_policy dcbnl_cap_nest[DCB_CAP_ATTR_MAX + 1] = {
        [DCB_CAP_ATTR_ALL]     = {.type = NLA_FLAG},
        [DCB_CAP_ATTR_PG]      = {.type = NLA_U8},
        [DCB_CAP_ATTR_PFC]     = {.type = NLA_U8},
        [DCB_CAP_ATTR_UP2TC]   = {.type = NLA_U8},
        [DCB_CAP_ATTR_PG_TCS]  = {.type = NLA_U8},
        [DCB_CAP_ATTR_PFC_TCS] = {.type = NLA_U8},
        [DCB_CAP_ATTR_GSP]     = {.type = NLA_U8},
        [DCB_CAP_ATTR_BCN]     = {.type = NLA_U8},
        [DCB_CAP_ATTR_DCBX]    = {.type = NLA_U8},
};

/* DCB capabilities nested attributes. */
static const struct nla_policy dcbnl_numtcs_nest[DCB_NUMTCS_ATTR_MAX + 1] = {
        [DCB_NUMTCS_ATTR_ALL]     = {.type = NLA_FLAG},
        [DCB_NUMTCS_ATTR_PG]      = {.type = NLA_U8},
        [DCB_NUMTCS_ATTR_PFC]     = {.type = NLA_U8},
};

/* DCB BCN nested attributes. */
static const struct nla_policy dcbnl_bcn_nest[DCB_BCN_ATTR_MAX + 1] = {
        [DCB_BCN_ATTR_RP_0]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_1]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_2]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_3]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_4]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_5]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_6]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_7]         = {.type = NLA_U8},
        [DCB_BCN_ATTR_RP_ALL]       = {.type = NLA_FLAG},
        [DCB_BCN_ATTR_BCNA_0]       = {.type = NLA_U32},
        [DCB_BCN_ATTR_BCNA_1]       = {.type = NLA_U32},
        [DCB_BCN_ATTR_ALPHA]        = {.type = NLA_U32},
        [DCB_BCN_ATTR_BETA]         = {.type = NLA_U32},
        [DCB_BCN_ATTR_GD]           = {.type = NLA_U32},
        [DCB_BCN_ATTR_GI]           = {.type = NLA_U32},
        [DCB_BCN_ATTR_TMAX]         = {.type = NLA_U32},
        [DCB_BCN_ATTR_TD]           = {.type = NLA_U32},
        [DCB_BCN_ATTR_RMIN]         = {.type = NLA_U32},
        [DCB_BCN_ATTR_W]            = {.type = NLA_U32},
        [DCB_BCN_ATTR_RD]           = {.type = NLA_U32},
        [DCB_BCN_ATTR_RU]           = {.type = NLA_U32},
        [DCB_BCN_ATTR_WRTT]         = {.type = NLA_U32},
        [DCB_BCN_ATTR_RI]           = {.type = NLA_U32},
        [DCB_BCN_ATTR_C]            = {.type = NLA_U32},
        [DCB_BCN_ATTR_ALL]          = {.type = NLA_FLAG},
};

/* DCB APP nested attributes. */
static const struct nla_policy dcbnl_app_nest[DCB_APP_ATTR_MAX + 1] = {
        [DCB_APP_ATTR_IDTYPE]       = {.type = NLA_U8},
        [DCB_APP_ATTR_ID]           = {.type = NLA_U16},
        [DCB_APP_ATTR_PRIORITY]     = {.type = NLA_U8},
};

/* IEEE 802.1Qaz nested attributes. */
static const struct nla_policy dcbnl_ieee_policy[DCB_ATTR_IEEE_MAX + 1] = {
        [DCB_ATTR_IEEE_ETS]            = {.len = sizeof(struct ieee_ets)},
        [DCB_ATTR_IEEE_PFC]            = {.len = sizeof(struct ieee_pfc)},
        [DCB_ATTR_IEEE_APP_TABLE]   = {.type = NLA_NESTED},
        [DCB_ATTR_IEEE_MAXRATE]   = {.len = sizeof(struct ieee_maxrate)},
        [DCB_ATTR_IEEE_QCN]         = {.len = sizeof(struct ieee_qcn)},
        [DCB_ATTR_IEEE_QCN_STATS]   = {.len = sizeof(struct ieee_qcn_stats)},
        [DCB_ATTR_DCB_BUFFER]       = {.len = sizeof(struct dcbnl_buffer)},
        [DCB_ATTR_DCB_APP_TRUST_TABLE] = {.type = NLA_NESTED},
};

/* DCB number of traffic classes nested attributes. */
static const struct nla_policy dcbnl_featcfg_nest[DCB_FEATCFG_ATTR_MAX + 1] = {
        [DCB_FEATCFG_ATTR_ALL]      = {.type = NLA_FLAG},
        [DCB_FEATCFG_ATTR_PG]       = {.type = NLA_U8},
        [DCB_FEATCFG_ATTR_PFC]      = {.type = NLA_U8},
        [DCB_FEATCFG_ATTR_APP]      = {.type = NLA_U8},
};

static LIST_HEAD(dcb_app_list);
static LIST_HEAD(dcb_rewr_list);
static DEFINE_SPINLOCK(dcb_lock);

static enum ieee_attrs_app dcbnl_app_attr_type_get(u8 selector)
{
        switch (selector) {
        case IEEE_8021QAZ_APP_SEL_ETHERTYPE:
        case IEEE_8021QAZ_APP_SEL_STREAM:
        case IEEE_8021QAZ_APP_SEL_DGRAM:
        case IEEE_8021QAZ_APP_SEL_ANY:
        case IEEE_8021QAZ_APP_SEL_DSCP:
                return DCB_ATTR_IEEE_APP;
        case DCB_APP_SEL_PCP:
                return DCB_ATTR_DCB_APP;
        default:
                return DCB_ATTR_IEEE_APP_UNSPEC;
        }
}

static bool dcbnl_app_attr_type_validate(enum ieee_attrs_app type)
{
        switch (type) {
        case DCB_ATTR_IEEE_APP:
        case DCB_ATTR_DCB_APP:
                return true;
        default:
                return false;
        }
}

static bool dcbnl_app_selector_validate(enum ieee_attrs_app type, u8 selector)
{
        return dcbnl_app_attr_type_get(selector) == type;
}

static struct sk_buff *dcbnl_newmsg(int type, u8 cmd, u32 port, u32 seq,
                                    u32 flags, struct nlmsghdr **nlhp)
{
        struct sk_buff *skb;
        struct dcbmsg *dcb;
        struct nlmsghdr *nlh;

        skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
        if (!skb)
                return NULL;

        nlh = nlmsg_put(skb, port, seq, type, sizeof(*dcb), flags);
        BUG_ON(!nlh);

        dcb = nlmsg_data(nlh);
        dcb->dcb_family = AF_UNSPEC;
        dcb->cmd = cmd;
        dcb->dcb_pad = 0;

        if (nlhp)
                *nlhp = nlh;

        return skb;
}

static int dcbnl_getstate(struct net_device *netdev, struct nlmsghdr *nlh,
                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        /* if (!tb[DCB_ATTR_STATE] || !netdev->dcbnl_ops->getstate) */
        if (!netdev->dcbnl_ops->getstate)
                return -EOPNOTSUPP;

        return nla_put_u8(skb, DCB_ATTR_STATE,
                          netdev->dcbnl_ops->getstate(netdev));
}

static int dcbnl_getpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1], *nest;
        u8 value;
        int ret;
        int i;
        int getall = 0;

        if (!tb[DCB_ATTR_PFC_CFG])
                return -EINVAL;

        if (!netdev->dcbnl_ops->getpfccfg)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
                                          tb[DCB_ATTR_PFC_CFG],
                                          dcbnl_pfc_up_nest, NULL);
        if (ret)
                return ret;

        nest = nla_nest_start_noflag(skb, DCB_ATTR_PFC_CFG);
        if (!nest)
                return -EMSGSIZE;

        if (data[DCB_PFC_UP_ATTR_ALL])
                getall = 1;

        for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
                if (!getall && !data[i])
                        continue;

                netdev->dcbnl_ops->getpfccfg(netdev, i - DCB_PFC_UP_ATTR_0,
                                             &value);
                ret = nla_put_u8(skb, i, value);
                if (ret) {
                        nla_nest_cancel(skb, nest);
                        return ret;
                }
        }
        nla_nest_end(skb, nest);

        return 0;
}

static int dcbnl_getperm_hwaddr(struct net_device *netdev, struct nlmsghdr *nlh,
                                u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        u8 perm_addr[MAX_ADDR_LEN];

        if (!netdev->dcbnl_ops->getpermhwaddr)
                return -EOPNOTSUPP;

        memset(perm_addr, 0, sizeof(perm_addr));
        netdev->dcbnl_ops->getpermhwaddr(netdev, perm_addr);

        return nla_put(skb, DCB_ATTR_PERM_HWADDR, sizeof(perm_addr), perm_addr);
}

static int dcbnl_getcap(struct net_device *netdev, struct nlmsghdr *nlh,
                        u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        struct nlattr *data[DCB_CAP_ATTR_MAX + 1], *nest;
        u8 value;
        int ret;
        int i;
        int getall = 0;

        if (!tb[DCB_ATTR_CAP])
                return -EINVAL;

        if (!netdev->dcbnl_ops->getcap)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(data, DCB_CAP_ATTR_MAX,
                                          tb[DCB_ATTR_CAP], dcbnl_cap_nest,
                                          NULL);
        if (ret)
                return ret;

        nest = nla_nest_start_noflag(skb, DCB_ATTR_CAP);
        if (!nest)
                return -EMSGSIZE;

        if (data[DCB_CAP_ATTR_ALL])
                getall = 1;

        for (i = DCB_CAP_ATTR_ALL+1; i <= DCB_CAP_ATTR_MAX; i++) {
                if (!getall && !data[i])
                        continue;

                if (!netdev->dcbnl_ops->getcap(netdev, i, &value)) {
                        ret = nla_put_u8(skb, i, value);
                        if (ret) {
                                nla_nest_cancel(skb, nest);
                                return ret;
                        }
                }
        }
        nla_nest_end(skb, nest);

        return 0;
}

static int dcbnl_getnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1], *nest;
        u8 value;
        int ret;
        int i;
        int getall = 0;

        if (!tb[DCB_ATTR_NUMTCS])
                return -EINVAL;

        if (!netdev->dcbnl_ops->getnumtcs)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
                                          tb[DCB_ATTR_NUMTCS],
                                          dcbnl_numtcs_nest, NULL);
        if (ret)
                return ret;

        nest = nla_nest_start_noflag(skb, DCB_ATTR_NUMTCS);
        if (!nest)
                return -EMSGSIZE;

        if (data[DCB_NUMTCS_ATTR_ALL])
                getall = 1;

        for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
                if (!getall && !data[i])
                        continue;

                ret = netdev->dcbnl_ops->getnumtcs(netdev, i, &value);
                if (!ret) {
                        ret = nla_put_u8(skb, i, value);
                        if (ret) {
                                nla_nest_cancel(skb, nest);
                                return ret;
                        }
                } else
                        return -EINVAL;
        }
        nla_nest_end(skb, nest);

        return 0;
}

static int dcbnl_setnumtcs(struct net_device *netdev, struct nlmsghdr *nlh,
                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        struct nlattr *data[DCB_NUMTCS_ATTR_MAX + 1];
        int ret;
        u8 value;
        int i;

        if (!tb[DCB_ATTR_NUMTCS])
                return -EINVAL;

        if (!netdev->dcbnl_ops->setnumtcs)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(data, DCB_NUMTCS_ATTR_MAX,
                                          tb[DCB_ATTR_NUMTCS],
                                          dcbnl_numtcs_nest, NULL);
        if (ret)
                return ret;

        for (i = DCB_NUMTCS_ATTR_ALL+1; i <= DCB_NUMTCS_ATTR_MAX; i++) {
                if (data[i] == NULL)
                        continue;

                value = nla_get_u8(data[i]);

                ret = netdev->dcbnl_ops->setnumtcs(netdev, i, value);
                if (ret)
                        break;
        }

        return nla_put_u8(skb, DCB_ATTR_NUMTCS, !!ret);
}

static int dcbnl_getpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        if (!netdev->dcbnl_ops->getpfcstate)
                return -EOPNOTSUPP;

        return nla_put_u8(skb, DCB_ATTR_PFC_STATE,
                          netdev->dcbnl_ops->getpfcstate(netdev));
}

static int dcbnl_setpfcstate(struct net_device *netdev, struct nlmsghdr *nlh,
                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        u8 value;

        if (!tb[DCB_ATTR_PFC_STATE])
                return -EINVAL;

        if (!netdev->dcbnl_ops->setpfcstate)
                return -EOPNOTSUPP;

        value = nla_get_u8(tb[DCB_ATTR_PFC_STATE]);

        netdev->dcbnl_ops->setpfcstate(netdev, value);

        return nla_put_u8(skb, DCB_ATTR_PFC_STATE, 0);
}

static int dcbnl_getapp(struct net_device *netdev, struct nlmsghdr *nlh,
                        u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        struct nlattr *app_nest;
        struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];
        u16 id;
        u8 up, idtype;
        int ret;

        if (!tb[DCB_ATTR_APP])
                return -EINVAL;

        ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
                                          tb[DCB_ATTR_APP], dcbnl_app_nest,
                                          NULL);
        if (ret)
                return ret;

        /* all must be non-null */
        if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
            (!app_tb[DCB_APP_ATTR_ID]))
                return -EINVAL;

        /* either by eth type or by socket number */
        idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
        if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
            (idtype != DCB_APP_IDTYPE_PORTNUM))
                return -EINVAL;

        id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);

        if (netdev->dcbnl_ops->getapp) {
                ret = netdev->dcbnl_ops->getapp(netdev, idtype, id);
                if (ret < 0)
                        return ret;
                else
                        up = ret;
        } else {
                struct dcb_app app = {
                                        .selector = idtype,
                                        .protocol = id,
                                     };
                up = dcb_getapp(netdev, &app);
        }

        app_nest = nla_nest_start_noflag(skb, DCB_ATTR_APP);
        if (!app_nest)
                return -EMSGSIZE;

        ret = nla_put_u8(skb, DCB_APP_ATTR_IDTYPE, idtype);
        if (ret)
                goto out_cancel;

        ret = nla_put_u16(skb, DCB_APP_ATTR_ID, id);
        if (ret)
                goto out_cancel;

        ret = nla_put_u8(skb, DCB_APP_ATTR_PRIORITY, up);
        if (ret)
                goto out_cancel;

        nla_nest_end(skb, app_nest);

        return 0;

out_cancel:
        nla_nest_cancel(skb, app_nest);
        return ret;
}

static int dcbnl_setapp(struct net_device *netdev, struct nlmsghdr *nlh,
                        u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        int ret;
        u16 id;
        u8 up, idtype;
        struct nlattr *app_tb[DCB_APP_ATTR_MAX + 1];

        if (!tb[DCB_ATTR_APP])
                return -EINVAL;

        ret = nla_parse_nested_deprecated(app_tb, DCB_APP_ATTR_MAX,
                                          tb[DCB_ATTR_APP], dcbnl_app_nest,
                                          NULL);
        if (ret)
                return ret;

        /* all must be non-null */
        if ((!app_tb[DCB_APP_ATTR_IDTYPE]) ||
            (!app_tb[DCB_APP_ATTR_ID]) ||
            (!app_tb[DCB_APP_ATTR_PRIORITY]))
                return -EINVAL;

        /* either by eth type or by socket number */
        idtype = nla_get_u8(app_tb[DCB_APP_ATTR_IDTYPE]);
        if ((idtype != DCB_APP_IDTYPE_ETHTYPE) &&
            (idtype != DCB_APP_IDTYPE_PORTNUM))
                return -EINVAL;

        id = nla_get_u16(app_tb[DCB_APP_ATTR_ID]);
        up = nla_get_u8(app_tb[DCB_APP_ATTR_PRIORITY]);

        if (netdev->dcbnl_ops->setapp) {
                ret = netdev->dcbnl_ops->setapp(netdev, idtype, id, up);
                if (ret < 0)
                        return ret;
        } else {
                struct dcb_app app;
                app.selector = idtype;
                app.protocol = id;
                app.priority = up;
                ret = dcb_setapp(netdev, &app);
        }

        ret = nla_put_u8(skb, DCB_ATTR_APP, ret);
        dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SAPP, seq, 0);

        return ret;
}

static int __dcbnl_pg_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
                             struct nlattr **tb, struct sk_buff *skb, int dir)
{
        struct nlattr *pg_nest, *param_nest, *data;
        struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
        struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
        u8 prio, pgid, tc_pct, up_map;
        int ret;
        int getall = 0;
        int i;

        if (!tb[DCB_ATTR_PG_CFG])
                return -EINVAL;

        if (!netdev->dcbnl_ops->getpgtccfgtx ||
            !netdev->dcbnl_ops->getpgtccfgrx ||
            !netdev->dcbnl_ops->getpgbwgcfgtx ||
            !netdev->dcbnl_ops->getpgbwgcfgrx)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
                                          tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
                                          NULL);
        if (ret)
                return ret;

        pg_nest = nla_nest_start_noflag(skb, DCB_ATTR_PG_CFG);
        if (!pg_nest)
                return -EMSGSIZE;

        if (pg_tb[DCB_PG_ATTR_TC_ALL])
                getall = 1;

        for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
                if (!getall && !pg_tb[i])
                        continue;

                if (pg_tb[DCB_PG_ATTR_TC_ALL])
                        data = pg_tb[DCB_PG_ATTR_TC_ALL];
                else
                        data = pg_tb[i];
                ret = nla_parse_nested_deprecated(param_tb,
                                                  DCB_TC_ATTR_PARAM_MAX, data,
                                                  dcbnl_tc_param_nest, NULL);
                if (ret)
                        goto err_pg;

                param_nest = nla_nest_start_noflag(skb, i);
                if (!param_nest)
                        goto err_pg;

                pgid = DCB_ATTR_VALUE_UNDEFINED;
                prio = DCB_ATTR_VALUE_UNDEFINED;
                tc_pct = DCB_ATTR_VALUE_UNDEFINED;
                up_map = DCB_ATTR_VALUE_UNDEFINED;

                if (dir) {
                        /* Rx */
                        netdev->dcbnl_ops->getpgtccfgrx(netdev,
                                                i - DCB_PG_ATTR_TC_0, &prio,
                                                &pgid, &tc_pct, &up_map);
                } else {
                        /* Tx */
                        netdev->dcbnl_ops->getpgtccfgtx(netdev,
                                                i - DCB_PG_ATTR_TC_0, &prio,
                                                &pgid, &tc_pct, &up_map);
                }

                if (param_tb[DCB_TC_ATTR_PARAM_PGID] ||
                    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
                        ret = nla_put_u8(skb,
                                         DCB_TC_ATTR_PARAM_PGID, pgid);
                        if (ret)
                                goto err_param;
                }
                if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING] ||
                    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
                        ret = nla_put_u8(skb,
                                         DCB_TC_ATTR_PARAM_UP_MAPPING, up_map);
                        if (ret)
                                goto err_param;
                }
                if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO] ||
                    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
                        ret = nla_put_u8(skb,
                                         DCB_TC_ATTR_PARAM_STRICT_PRIO, prio);
                        if (ret)
                                goto err_param;
                }
                if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT] ||
                    param_tb[DCB_TC_ATTR_PARAM_ALL]) {
                        ret = nla_put_u8(skb, DCB_TC_ATTR_PARAM_BW_PCT,
                                         tc_pct);
                        if (ret)
                                goto err_param;
                }
                nla_nest_end(skb, param_nest);
        }

        if (pg_tb[DCB_PG_ATTR_BW_ID_ALL])
                getall = 1;
        else
                getall = 0;

        for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
                if (!getall && !pg_tb[i])
                        continue;

                tc_pct = DCB_ATTR_VALUE_UNDEFINED;

                if (dir) {
                        /* Rx */
                        netdev->dcbnl_ops->getpgbwgcfgrx(netdev,
                                        i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
                } else {
                        /* Tx */
                        netdev->dcbnl_ops->getpgbwgcfgtx(netdev,
                                        i - DCB_PG_ATTR_BW_ID_0, &tc_pct);
                }
                ret = nla_put_u8(skb, i, tc_pct);
                if (ret)
                        goto err_pg;
        }

        nla_nest_end(skb, pg_nest);

        return 0;

err_param:
        nla_nest_cancel(skb, param_nest);
err_pg:
        nla_nest_cancel(skb, pg_nest);

        return -EMSGSIZE;
}

static int dcbnl_pgtx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 0);
}

static int dcbnl_pgrx_getcfg(struct net_device *netdev, struct nlmsghdr *nlh,
                             u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        return __dcbnl_pg_getcfg(netdev, nlh, tb, skb, 1);
}

static int dcbnl_setstate(struct net_device *netdev, struct nlmsghdr *nlh,
                          u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        u8 value;

        if (!tb[DCB_ATTR_STATE])
                return -EINVAL;

        if (!netdev->dcbnl_ops->setstate)
                return -EOPNOTSUPP;

        value = nla_get_u8(tb[DCB_ATTR_STATE]);

        return nla_put_u8(skb, DCB_ATTR_STATE,
                          netdev->dcbnl_ops->setstate(netdev, value));
}

static int dcbnl_setpfccfg(struct net_device *netdev, struct nlmsghdr *nlh,
                           u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        struct nlattr *data[DCB_PFC_UP_ATTR_MAX + 1];
        int i;
        int ret;
        u8 value;

        if (!tb[DCB_ATTR_PFC_CFG])
                return -EINVAL;

        if (!netdev->dcbnl_ops->setpfccfg)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(data, DCB_PFC_UP_ATTR_MAX,
                                          tb[DCB_ATTR_PFC_CFG],
                                          dcbnl_pfc_up_nest, NULL);
        if (ret)
                return ret;

        for (i = DCB_PFC_UP_ATTR_0; i <= DCB_PFC_UP_ATTR_7; i++) {
                if (data[i] == NULL)
                        continue;
                value = nla_get_u8(data[i]);
                netdev->dcbnl_ops->setpfccfg(netdev,
                        data[i]->nla_type - DCB_PFC_UP_ATTR_0, value);
        }

        return nla_put_u8(skb, DCB_ATTR_PFC_CFG, 0);
}

static int dcbnl_setall(struct net_device *netdev, struct nlmsghdr *nlh,
                        u32 seq, struct nlattr **tb, struct sk_buff *skb)
{
        int ret;

        if (!tb[DCB_ATTR_SET_ALL])
                return -EINVAL;

        if (!netdev->dcbnl_ops->setall)
                return -EOPNOTSUPP;

        ret = nla_put_u8(skb, DCB_ATTR_SET_ALL,
                         netdev->dcbnl_ops->setall(netdev));
        dcbnl_cee_notify(netdev, RTM_SETDCB, DCB_CMD_SET_ALL, seq, 0);

        return ret;
}

static int __dcbnl_pg_setcfg(struct net_device *netdev, struct nlmsghdr *nlh,
                             u32 seq, struct nlattr **tb, struct sk_buff *skb,
                             int dir)
{
        struct nlattr *pg_tb[DCB_PG_ATTR_MAX + 1];
        struct nlattr *param_tb[DCB_TC_ATTR_PARAM_MAX + 1];
        int ret;
        int i;
        u8 pgid;
        u8 up_map;
        u8 prio;
        u8 tc_pct;

        if (!tb[DCB_ATTR_PG_CFG])
                return -EINVAL;

        if (!netdev->dcbnl_ops->setpgtccfgtx ||
            !netdev->dcbnl_ops->setpgtccfgrx ||
            !netdev->dcbnl_ops->setpgbwgcfgtx ||
            !netdev->dcbnl_ops->setpgbwgcfgrx)
                return -EOPNOTSUPP;

        ret = nla_parse_nested_deprecated(pg_tb, DCB_PG_ATTR_MAX,
                                          tb[DCB_ATTR_PG_CFG], dcbnl_pg_nest,
                                          NULL);
        if (ret)
                return ret;

        for (i = DCB_PG_ATTR_TC_0; i <= DCB_PG_ATTR_TC_7; i++) {
                if (!pg_tb[i])
                        continue;

                ret = nla_parse_nested_deprecated(param_tb,
                                                  DCB_TC_ATTR_PARAM_MAX,
                                                  pg_tb[i],
                                                  dcbnl_tc_param_nest, NULL);
                if (ret)
                        return ret;

                pgid = DCB_ATTR_VALUE_UNDEFINED;
                prio = DCB_ATTR_VALUE_UNDEFINED;
                tc_pct = DCB_ATTR_VALUE_UNDEFINED;
                up_map = DCB_ATTR_VALUE_UNDEFINED;

                if (param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO])
                        prio =
                            nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_STRICT_PRIO]);

                if (param_tb[DCB_TC_ATTR_PARAM_PGID])
                        pgid = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_PGID]);

                if (param_tb[DCB_TC_ATTR_PARAM_BW_PCT])
                        tc_pct = nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_BW_PCT]);

                if (param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING])
                        up_map =
                             nla_get_u8(param_tb[DCB_TC_ATTR_PARAM_UP_MAPPING]);

                /* dir: Tx = 0, Rx = 1 */
                if (dir) {
                        /* Rx */
                        netdev->dcbnl_ops->setpgtccfgrx(netdev,
                                i - DCB_PG_ATTR_TC_0,
                                prio, pgid, tc_pct, up_map);
                } else {
                        /* Tx */
                        netdev->dcbnl_ops->setpgtccfgtx(netdev,
                                i - DCB_PG_ATTR_TC_0,
                                prio, pgid, tc_pct, up_map);
                }
        }

        for (i = DCB_PG_ATTR_BW_ID_0; i <= DCB_PG_ATTR_BW_ID_7; i++) {
                if (!pg_tb[i])
                        continue;

                tc_pct = nla_get_u8(pg_tb[i]);

                /* dir: Tx = 0, Rx = 1 */
                if (dir) {
                        /* Rx */
                        netdev->dcbnl_ops->setpgbwgcfgrx(netdev,
                                         i - DCB_PG_ATTR_BW_ID_0, tc_pct);
                } else {
                        /* Tx */
                        netdev->dcbnl_ops