| 5 1 3 10 9 1 10 5 5 5 5 5 1 5 5 5 2 1 2 4 3 4 3 3 1 2 2 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 | // SPDX-License-Identifier: GPL-2.0-only /* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@netfilter.org> */ /* Kernel module implementing an IP set type: the hash:ip,port type */ #include <linux/jhash.h> #include <linux/module.h> #include <linux/ip.h> #include <linux/skbuff.h> #include <linux/errno.h> #include <linux/random.h> #include <net/ip.h> #include <net/ipv6.h> #include <net/netlink.h> #include <net/tcp.h> #include <linux/netfilter.h> #include <linux/netfilter/ipset/pfxlen.h> #include <linux/netfilter/ipset/ip_set.h> #include <linux/netfilter/ipset/ip_set_getport.h> #include <linux/netfilter/ipset/ip_set_hash.h> #define IPSET_TYPE_REV_MIN 0 /* 1 SCTP and UDPLITE support added */ /* 2 Counters support added */ /* 3 Comments support added */ /* 4 Forceadd support added */ /* 5 skbinfo support added */ /* 6 bucketsize, initval support added */ #define IPSET_TYPE_REV_MAX 7 /* bitmask support added */ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@netfilter.org>"); IP_SET_MODULE_DESC("hash:ip,port", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX); MODULE_ALIAS("ip_set_hash:ip,port"); /* Type specific function prefix */ #define HTYPE hash_ipport #define IP_SET_HASH_WITH_NETMASK #define IP_SET_HASH_WITH_BITMASK /* IPv4 variant */ /* Member elements */ struct hash_ipport4_elem { __be32 ip; __be16 port; u8 proto; u8 padding; }; /* Common functions */ static bool hash_ipport4_data_equal(const struct hash_ipport4_elem *ip1, const struct hash_ipport4_elem *ip2, u32 *multi) { return ip1->ip == ip2->ip && ip1->port == ip2->port && ip1->proto == ip2->proto; } static bool hash_ipport4_data_list(struct sk_buff *skb, const struct hash_ipport4_elem *data) { if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) || nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto)) goto nla_put_failure; return false; nla_put_failure: return true; } static void hash_ipport4_data_next(struct hash_ipport4_elem *next, const struct hash_ipport4_elem *d) { next->ip = d->ip; next->port = d->port; } #define MTYPE hash_ipport4 #define HOST_MASK 32 #include "ip_set_hash_gen.h" static int hash_ipport4_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, enum ipset_adt adt, struct ip_set_adt_opt *opt) { ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_ipport4_elem e = { .ip = 0 }; struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); const struct MTYPE *h = set->data; if (!ip_set_get_ip4_port(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.port, &e.proto)) return -EINVAL; ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip); e.ip &= h->bitmask.ip; if (e.ip == 0) return -EINVAL; return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags); } static int hash_ipport4_uadt(struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) { struct hash_ipport4 *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_ipport4_elem e = { .ip = 0 }; struct ip_set_ext ext = IP_SET_INIT_UEXT(set); u32 ip, ip_to = 0, p = 0, port, port_to, i = 0; bool with_ports = false; int ret; if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); if (unlikely(!tb[IPSET_ATTR_IP] || !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) || !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO))) return -IPSET_ERR_PROTOCOL; ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip); if (ret) return ret; ret = ip_set_get_extensions(set, tb, &ext); if (ret) return ret; e.ip &= h->bitmask.ip; if (e.ip == 0) return -EINVAL; e.port = nla_get_be16(tb[IPSET_ATTR_PORT]); if (tb[IPSET_ATTR_PROTO]) { e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]); with_ports = ip_set_proto_with_ports(e.proto); if (e.proto == 0) return -IPSET_ERR_INVALID_PROTO; } else { return -IPSET_ERR_MISSING_PROTO; } if (!(with_ports || e.proto == IPPROTO_ICMP)) e.port = 0; if (adt == IPSET_TEST || !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR] || tb[IPSET_ATTR_PORT_TO])) { ret = adtfn(set, &e, &ext, &ext, flags); return ip_set_eexist(ret, flags) ? 0 : ret; } ip_to = ip = ntohl(e.ip); if (tb[IPSET_ATTR_IP_TO]) { ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to); if (ret) return ret; if (ip > ip_to) swap(ip, ip_to); } else if (tb[IPSET_ATTR_CIDR]) { u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); if (!cidr || cidr > HOST_MASK) return -IPSET_ERR_INVALID_CIDR; ip_set_mask_from_to(ip, ip_to, cidr); } port_to = port = ntohs(e.port); if (with_ports && tb[IPSET_ATTR_PORT_TO]) { port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); if (port > port_to) swap(port, port_to); } if (retried) ip = ntohl(h->next.ip); for (; ip <= ip_to; ip++) { p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port) : port; for (; p <= port_to; p++, i++) { e.ip = htonl(ip); e.port = htons(p); if (i > IPSET_MAX_RANGE) { hash_ipport4_data_next(&h->next, &e); return -ERANGE; } ret = adtfn(set, &e, &ext, &ext, flags); if (ret && !ip_set_eexist(ret, flags)) return ret; ret = 0; } } return ret; } /* IPv6 variant */ struct hash_ipport6_elem { union nf_inet_addr ip; __be16 port; u8 proto; u8 padding; }; /* Common functions */ static bool hash_ipport6_data_equal(const struct hash_ipport6_elem *ip1, const struct hash_ipport6_elem *ip2, u32 *multi) { return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) && ip1->port == ip2->port && ip1->proto == ip2->proto; } static bool hash_ipport6_data_list(struct sk_buff *skb, const struct hash_ipport6_elem *data) { if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) || nla_put_net16(skb, IPSET_ATTR_PORT, data->port) || nla_put_u8(skb, IPSET_ATTR_PROTO, data->proto)) goto nla_put_failure; return false; nla_put_failure: return true; } static void hash_ipport6_data_next(struct hash_ipport6_elem *next, const struct hash_ipport6_elem *d) { next->port = d->port; } #undef MTYPE #undef HOST_MASK #define MTYPE hash_ipport6 #define HOST_MASK 128 #define IP_SET_EMIT_CREATE #include "ip_set_hash_gen.h" static int hash_ipport6_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, enum ipset_adt adt, struct ip_set_adt_opt *opt) { ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_ipport6_elem e = { .ip = { .all = { 0 } } }; struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); const struct MTYPE *h = set->data; if (!ip_set_get_ip6_port(skb, opt->flags & IPSET_DIM_TWO_SRC, &e.port, &e.proto)) return -EINVAL; ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6); nf_inet_addr_mask_inplace(&e.ip, &h->bitmask); if (ipv6_addr_any(&e.ip.in6)) return -EINVAL; return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags); } static int hash_ipport6_uadt(struct ip_set *set, struct nlattr *tb[], enum ipset_adt adt, u32 *lineno, u32 flags, bool retried) { const struct hash_ipport6 *h = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct hash_ipport6_elem e = { .ip = { .all = { 0 } } }; struct ip_set_ext ext = IP_SET_INIT_UEXT(set); u32 port, port_to; bool with_ports = false; int ret; if (tb[IPSET_ATTR_LINENO]) *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]); if (unlikely(!tb[IPSET_ATTR_IP] || !ip_set_attr_netorder(tb, IPSET_ATTR_PORT) || !ip_set_optattr_netorder(tb, IPSET_ATTR_PORT_TO))) return -IPSET_ERR_PROTOCOL; if (unlikely(tb[IPSET_ATTR_IP_TO])) return -IPSET_ERR_HASH_RANGE_UNSUPPORTED; if (unlikely(tb[IPSET_ATTR_CIDR])) { u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]); if (cidr != HOST_MASK) return -IPSET_ERR_INVALID_CIDR; } ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip); if (ret) return ret; ret = ip_set_get_extensions(set, tb, &ext); if (ret) return ret; nf_inet_addr_mask_inplace(&e.ip, &h->bitmask); if (ipv6_addr_any(&e.ip.in6)) return -EINVAL; e.port = nla_get_be16(tb[IPSET_ATTR_PORT]); if (tb[IPSET_ATTR_PROTO]) { e.proto = nla_get_u8(tb[IPSET_ATTR_PROTO]); with_ports = ip_set_proto_with_ports(e.proto); if (e.proto == 0) return -IPSET_ERR_INVALID_PROTO; } else { return -IPSET_ERR_MISSING_PROTO; } if (!(with_ports || e.proto == IPPROTO_ICMPV6)) e.port = 0; if (adt == IPSET_TEST || !with_ports || !tb[IPSET_ATTR_PORT_TO]) { ret = adtfn(set, &e, &ext, &ext, flags); return ip_set_eexist(ret, flags) ? 0 : ret; } port = ntohs(e.port); port_to = ip_set_get_h16(tb[IPSET_ATTR_PORT_TO]); if (port > port_to) swap(port, port_to); if (retried) port = ntohs(h->next.port); for (; port <= port_to; port++) { e.port = htons(port); ret = adtfn(set, &e, &ext, &ext, flags); if (ret && !ip_set_eexist(ret, flags)) return ret; ret = 0; } return ret; } static struct ip_set_type hash_ipport_type __read_mostly = { .name = "hash:ip,port", .protocol = IPSET_PROTOCOL, .features = IPSET_TYPE_IP | IPSET_TYPE_PORT, .dimension = IPSET_DIM_TWO, .family = NFPROTO_UNSPEC, .revision_min = IPSET_TYPE_REV_MIN, .revision_max = IPSET_TYPE_REV_MAX, .create_flags[IPSET_TYPE_REV_MAX] = IPSET_CREATE_FLAG_BUCKETSIZE, .create = hash_ipport_create, .create_policy = { [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 }, [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 }, [IPSET_ATTR_INITVAL] = { .type = NLA_U32 }, [IPSET_ATTR_BUCKETSIZE] = { .type = NLA_U8 }, [IPSET_ATTR_RESIZE] = { .type = NLA_U8 }, [IPSET_ATTR_PROTO] = { .type = NLA_U8 }, [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, [IPSET_ATTR_NETMASK] = { .type = NLA_U8 }, [IPSET_ATTR_BITMASK] = { .type = NLA_NESTED }, }, .adt_policy = { [IPSET_ATTR_IP] = { .type = NLA_NESTED }, [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED }, [IPSET_ATTR_PORT] = { .type = NLA_U16 }, [IPSET_ATTR_PORT_TO] = { .type = NLA_U16 }, [IPSET_ATTR_CIDR] = { .type = NLA_U8 }, [IPSET_ATTR_PROTO] = { .type = NLA_U8 }, [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 }, [IPSET_ATTR_LINENO] = { .type = NLA_U32 }, [IPSET_ATTR_BYTES] = { .type = NLA_U64 }, [IPSET_ATTR_PACKETS] = { .type = NLA_U64 }, [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING, .len = IPSET_MAX_COMMENT_SIZE }, [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 }, [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 }, [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 }, }, .me = THIS_MODULE, }; static int __init hash_ipport_init(void) { return ip_set_type_register(&hash_ipport_type); } static void __exit hash_ipport_fini(void) { rcu_barrier(); ip_set_type_unregister(&hash_ipport_type); } module_init(hash_ipport_init); module_exit(hash_ipport_fini); |
| 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 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* Fallback per-CPU frame pointer holder * * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ #ifndef _ASM_GENERIC_IRQ_REGS_H #define _ASM_GENERIC_IRQ_REGS_H #include <linux/percpu.h> /* * Per-cpu current frame pointer - the location of the last exception frame on * the stack */ DECLARE_PER_CPU(struct pt_regs *, __irq_regs); static inline struct pt_regs *get_irq_regs(void) { return __this_cpu_read(__irq_regs); } static inline struct pt_regs *set_irq_regs(struct pt_regs *new_regs) { struct pt_regs *old_regs; old_regs = __this_cpu_read(__irq_regs); __this_cpu_write(__irq_regs, new_regs); return old_regs; } #endif /* _ASM_GENERIC_IRQ_REGS_H */ |
| 3375 396 3361 2478 3380 45 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 | // SPDX-License-Identifier: GPL-2.0 OR MIT /* * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. * * This is an implementation of the BLAKE2s hash and PRF functions. * * Information: https://blake2.net/ * */ #include <crypto/blake2s.h> #include <linux/bug.h> #include <linux/export.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/string.h> #include <linux/types.h> static const u8 blake2s_sigma[10][16] = { { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 }, { 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }, { 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 }, { 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 }, { 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 }, { 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 }, { 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 }, { 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 }, { 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 }, { 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 }, }; static inline void blake2s_increment_counter(struct blake2s_state *state, const u32 inc) { state->t[0] += inc; state->t[1] += (state->t[0] < inc); } static void __maybe_unused blake2s_compress_generic(struct blake2s_state *state, const u8 *block, size_t nblocks, const u32 inc) { u32 m[16]; u32 v[16]; int i; WARN_ON(IS_ENABLED(DEBUG) && (nblocks > 1 && inc != BLAKE2S_BLOCK_SIZE)); while (nblocks > 0) { blake2s_increment_counter(state, inc); memcpy(m, block, BLAKE2S_BLOCK_SIZE); le32_to_cpu_array(m, ARRAY_SIZE(m)); memcpy(v, state->h, 32); v[ 8] = BLAKE2S_IV0; v[ 9] = BLAKE2S_IV1; v[10] = BLAKE2S_IV2; v[11] = BLAKE2S_IV3; v[12] = BLAKE2S_IV4 ^ state->t[0]; v[13] = BLAKE2S_IV5 ^ state->t[1]; v[14] = BLAKE2S_IV6 ^ state->f[0]; v[15] = BLAKE2S_IV7 ^ state->f[1]; #define G(r, i, a, b, c, d) do { \ a += b + m[blake2s_sigma[r][2 * i + 0]]; \ d = ror32(d ^ a, 16); \ c += d; \ b = ror32(b ^ c, 12); \ a += b + m[blake2s_sigma[r][2 * i + 1]]; \ d = ror32(d ^ a, 8); \ c += d; \ b = ror32(b ^ c, 7); \ } while (0) #define ROUND(r) do { \ G(r, 0, v[0], v[ 4], v[ 8], v[12]); \ G(r, 1, v[1], v[ 5], v[ 9], v[13]); \ G(r, 2, v[2], v[ 6], v[10], v[14]); \ G(r, 3, v[3], v[ 7], v[11], v[15]); \ G(r, 4, v[0], v[ 5], v[10], v[15]); \ G(r, 5, v[1], v[ 6], v[11], v[12]); \ G(r, 6, v[2], v[ 7], v[ 8], v[13]); \ G(r, 7, v[3], v[ 4], v[ 9], v[14]); \ } while (0) ROUND(0); ROUND(1); ROUND(2); ROUND(3); ROUND(4); ROUND(5); ROUND(6); ROUND(7); ROUND(8); ROUND(9); #undef G #undef ROUND for (i = 0; i < 8; ++i) state->h[i] ^= v[i] ^ v[i + 8]; block += BLAKE2S_BLOCK_SIZE; --nblocks; } } #ifdef CONFIG_CRYPTO_LIB_BLAKE2S_ARCH #include "blake2s.h" /* $(SRCARCH)/blake2s.h */ #else #define blake2s_compress blake2s_compress_generic #endif static inline void blake2s_set_lastblock(struct blake2s_state *state) { state->f[0] = -1; } void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen) { const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen; if (unlikely(!inlen)) return; if (inlen > fill) { memcpy(state->buf + state->buflen, in, fill); blake2s_compress(state, state->buf, 1, BLAKE2S_BLOCK_SIZE); state->buflen = 0; in += fill; inlen -= fill; } if (inlen > BLAKE2S_BLOCK_SIZE) { const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE); blake2s_compress(state, in, nblocks - 1, BLAKE2S_BLOCK_SIZE); in += BLAKE2S_BLOCK_SIZE * (nblocks - 1); inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1); } memcpy(state->buf + state->buflen, in, inlen); state->buflen += inlen; } EXPORT_SYMBOL(blake2s_update); void blake2s_final(struct blake2s_state *state, u8 *out) { WARN_ON(IS_ENABLED(DEBUG) && !out); blake2s_set_lastblock(state); memset(state->buf + state->buflen, 0, BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */ blake2s_compress(state, state->buf, 1, state->buflen); cpu_to_le32_array(state->h, ARRAY_SIZE(state->h)); memcpy(out, state->h, state->outlen); memzero_explicit(state, sizeof(*state)); } EXPORT_SYMBOL(blake2s_final); #ifdef blake2s_mod_init_arch static int __init blake2s_mod_init(void) { blake2s_mod_init_arch(); return 0; } subsys_initcall(blake2s_mod_init); #endif MODULE_DESCRIPTION("BLAKE2s hash function"); MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>"); |
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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 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. */ #include "xfs.h" #include "xfs_fs.h" #include "xfs_shared.h" #include "xfs_format.h" #include "xfs_log_format.h" #include "xfs_trans_resv.h" #include "xfs_bit.h" #include "xfs_mount.h" #include "xfs_trans.h" #include "xfs_trans_priv.h" #include "xfs_buf_item.h" #include "xfs_inode.h" #include "xfs_inode_item.h" #include "xfs_quota.h" #include "xfs_dquot_item.h" #include "xfs_dquot.h" #include "xfs_trace.h" #include "xfs_log.h" #include "xfs_log_priv.h" #include "xfs_error.h" struct kmem_cache *xfs_buf_item_cache; static inline struct xfs_buf_log_item *BUF_ITEM(struct xfs_log_item *lip) { return container_of(lip, struct xfs_buf_log_item, bli_item); } static void xfs_buf_item_get_format( struct xfs_buf_log_item *bip, int count) { ASSERT(bip->bli_formats == NULL); bip->bli_format_count = count; if (count == 1) { bip->bli_formats = &bip->__bli_format; return; } bip->bli_formats = kzalloc(count * sizeof(struct xfs_buf_log_format), GFP_KERNEL | __GFP_NOFAIL); } static void xfs_buf_item_free_format( struct xfs_buf_log_item *bip) { if (bip->bli_formats != &bip->__bli_format) { kfree(bip->bli_formats); bip->bli_formats = NULL; } } static void xfs_buf_item_free( struct xfs_buf_log_item *bip) { xfs_buf_item_free_format(bip); kvfree(bip->bli_item.li_lv_shadow); kmem_cache_free(xfs_buf_item_cache, bip); } /* * xfs_buf_item_relse() is called when the buf log item is no longer needed. */ static void xfs_buf_item_relse( struct xfs_buf_log_item *bip) { struct xfs_buf *bp = bip->bli_buf; trace_xfs_buf_item_relse(bp, _RET_IP_); ASSERT(!test_bit(XFS_LI_IN_AIL, &bip->bli_item.li_flags)); ASSERT(atomic_read(&bip->bli_refcount) == 0); bp->b_log_item = NULL; xfs_buf_rele(bp); xfs_buf_item_free(bip); } /* Is this log iovec plausibly large enough to contain the buffer log format? */ bool xfs_buf_log_check_iovec( struct kvec *iovec) { struct xfs_buf_log_format *blfp = iovec->iov_base; char *bmp_end; char *item_end; if (offsetof(struct xfs_buf_log_format, blf_data_map) > iovec->iov_len) return false; item_end = (char *)iovec->iov_base + iovec->iov_len; bmp_end = (char *)&blfp->blf_data_map[blfp->blf_map_size]; return bmp_end <= item_end; } static inline int xfs_buf_log_format_size( struct xfs_buf_log_format *blfp) { return offsetof(struct xfs_buf_log_format, blf_data_map) + (blfp->blf_map_size * sizeof(blfp->blf_data_map[0])); } /* * Return the number of log iovecs and space needed to log the given buf log * item segment. * * It calculates this as 1 iovec for the buf log format structure and 1 for each * stretch of non-contiguous chunks to be logged. Contiguous chunks are logged * in a single iovec. */ STATIC void xfs_buf_item_size_segment( struct xfs_buf_log_item *bip, struct xfs_buf_log_format *blfp, uint offset, int *nvecs, int *nbytes) { int first_bit; int nbits; first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, 0); if (first_bit == -1) return; (*nvecs)++; *nbytes += xfs_buf_log_format_size(blfp); do { nbits = xfs_contig_bits(blfp->blf_data_map, blfp->blf_map_size, first_bit); ASSERT(nbits > 0); (*nvecs)++; *nbytes += nbits * XFS_BLF_CHUNK; /* * This takes the bit number to start looking from and * returns the next set bit from there. It returns -1 * if there are no more bits set or the start bit is * beyond the end of the bitmap. */ first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, (uint)first_bit + nbits + 1); } while (first_bit != -1); return; } /* * Compute the worst case log item overhead for an invalidated buffer with the * given map count and block size. */ unsigned int xfs_buf_inval_log_space( unsigned int map_count, unsigned int blocksize) { unsigned int chunks = DIV_ROUND_UP(blocksize, XFS_BLF_CHUNK); unsigned int bitmap_size = DIV_ROUND_UP(chunks, NBWORD); unsigned int ret = offsetof(struct xfs_buf_log_format, blf_data_map) + (bitmap_size * sizeof_field(struct xfs_buf_log_format, blf_data_map[0])); return ret * map_count; } /* * Return the number of log iovecs and space needed to log the given buf log * item. * * Discontiguous buffers need a format structure per region that is being * logged. This makes the changes in the buffer appear to log recovery as though * they came from separate buffers, just like would occur if multiple buffers * were used instead of a single discontiguous buffer. This enables * discontiguous buffers to be in-memory constructs, completely transparent to * what ends up on disk. * * If the XFS_BLI_STALE flag has been set, then log nothing but the buf log * format structures. If the item has previously been logged and has dirty * regions, we do not relog them in stale buffers. This has the effect of * reducing the size of the relogged item by the amount of dirty data tracked * by the log item. This can result in the committing transaction reducing the * amount of space being consumed by the CIL. */ STATIC void xfs_buf_item_size( struct xfs_log_item *lip, int *nvecs, int *nbytes) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; int i; int bytes; uint offset = 0; ASSERT(atomic_read(&bip->bli_refcount) > 0); if (bip->bli_flags & XFS_BLI_STALE) { /* * The buffer is stale, so all we need to log is the buf log * format structure with the cancel flag in it as we are never * going to replay the changes tracked in the log item. */ trace_xfs_buf_item_size_stale(bip); ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL); *nvecs += bip->bli_format_count; for (i = 0; i < bip->bli_format_count; i++) { *nbytes += xfs_buf_log_format_size(&bip->bli_formats[i]); } return; } ASSERT(bip->bli_flags & XFS_BLI_LOGGED); if (bip->bli_flags & XFS_BLI_ORDERED) { /* * The buffer has been logged just to order it. It is not being * included in the transaction commit, so no vectors are used at * all. */ trace_xfs_buf_item_size_ordered(bip); *nvecs = XFS_LOG_VEC_ORDERED; return; } /* * The vector count is based on the number of buffer vectors we have * dirty bits in. This will only be greater than one when we have a * compound buffer with more than one segment dirty. Hence for compound * buffers we need to track which segment the dirty bits correspond to, * and when we move from one segment to the next increment the vector * count for the extra buf log format structure that will need to be * written. */ bytes = 0; for (i = 0; i < bip->bli_format_count; i++) { xfs_buf_item_size_segment(bip, &bip->bli_formats[i], offset, nvecs, &bytes); offset += BBTOB(bp->b_maps[i].bm_len); } /* * Round up the buffer size required to minimise the number of memory * allocations that need to be done as this item grows when relogged by * repeated modifications. */ *nbytes = round_up(bytes, 512); trace_xfs_buf_item_size(bip); } static inline void xfs_buf_item_copy_iovec( struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, struct xfs_buf *bp, uint offset, int first_bit, uint nbits) { offset += first_bit * XFS_BLF_CHUNK; xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_BCHUNK, xfs_buf_offset(bp, offset), nbits * XFS_BLF_CHUNK); } static void xfs_buf_item_format_segment( struct xfs_buf_log_item *bip, struct xfs_log_vec *lv, struct xfs_log_iovec **vecp, uint offset, struct xfs_buf_log_format *blfp) { struct xfs_buf *bp = bip->bli_buf; uint base_size; int first_bit; uint nbits; /* copy the flags across from the base format item */ blfp->blf_flags = bip->__bli_format.blf_flags; /* * Base size is the actual size of the ondisk structure - it reflects * the actual size of the dirty bitmap rather than the size of the in * memory structure. */ base_size = xfs_buf_log_format_size(blfp); first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, 0); if (!(bip->bli_flags & XFS_BLI_STALE) && first_bit == -1) { /* * If the map is not be dirty in the transaction, mark * the size as zero and do not advance the vector pointer. */ return; } blfp = xlog_copy_iovec(lv, vecp, XLOG_REG_TYPE_BFORMAT, blfp, base_size); blfp->blf_size = 1; if (bip->bli_flags & XFS_BLI_STALE) { /* * The buffer is stale, so all we need to log * is the buf log format structure with the * cancel flag in it. */ trace_xfs_buf_item_format_stale(bip); ASSERT(blfp->blf_flags & XFS_BLF_CANCEL); return; } /* * Fill in an iovec for each set of contiguous chunks. */ do { ASSERT(first_bit >= 0); nbits = xfs_contig_bits(blfp->blf_data_map, blfp->blf_map_size, first_bit); ASSERT(nbits > 0); xfs_buf_item_copy_iovec(lv, vecp, bp, offset, first_bit, nbits); blfp->blf_size++; /* * This takes the bit number to start looking from and * returns the next set bit from there. It returns -1 * if there are no more bits set or the start bit is * beyond the end of the bitmap. */ first_bit = xfs_next_bit(blfp->blf_data_map, blfp->blf_map_size, (uint)first_bit + nbits + 1); } while (first_bit != -1); return; } /* * This is called to fill in the vector of log iovecs for the * given log buf item. It fills the first entry with a buf log * format structure, and the rest point to contiguous chunks * within the buffer. */ STATIC void xfs_buf_item_format( struct xfs_log_item *lip, struct xfs_log_vec *lv) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; struct xfs_log_iovec *vecp = NULL; uint offset = 0; int i; ASSERT(atomic_read(&bip->bli_refcount) > 0); ASSERT((bip->bli_flags & XFS_BLI_LOGGED) || (bip->bli_flags & XFS_BLI_STALE)); ASSERT((bip->bli_flags & XFS_BLI_STALE) || (xfs_blft_from_flags(&bip->__bli_format) > XFS_BLFT_UNKNOWN_BUF && xfs_blft_from_flags(&bip->__bli_format) < XFS_BLFT_MAX_BUF)); ASSERT(!(bip->bli_flags & XFS_BLI_ORDERED) || (bip->bli_flags & XFS_BLI_STALE)); /* * If it is an inode buffer, transfer the in-memory state to the * format flags and clear the in-memory state. * * For buffer based inode allocation, we do not transfer * this state if the inode buffer allocation has not yet been committed * to the log as setting the XFS_BLI_INODE_BUF flag will prevent * correct replay of the inode allocation. * * For icreate item based inode allocation, the buffers aren't written * to the journal during allocation, and hence we should always tag the * buffer as an inode buffer so that the correct unlinked list replay * occurs during recovery. */ if (bip->bli_flags & XFS_BLI_INODE_BUF) { if (xfs_has_v3inodes(lip->li_log->l_mp) || !((bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF) && xfs_log_item_in_current_chkpt(lip))) bip->__bli_format.blf_flags |= XFS_BLF_INODE_BUF; bip->bli_flags &= ~XFS_BLI_INODE_BUF; } for (i = 0; i < bip->bli_format_count; i++) { xfs_buf_item_format_segment(bip, lv, &vecp, offset, &bip->bli_formats[i]); offset += BBTOB(bp->b_maps[i].bm_len); } /* * Check to make sure everything is consistent. */ trace_xfs_buf_item_format(bip); } /* * This is called to pin the buffer associated with the buf log item in memory * so it cannot be written out. * * We take a reference to the buffer log item here so that the BLI life cycle * extends at least until the buffer is unpinned via xfs_buf_item_unpin() and * inserted into the AIL. * * We also need to take a reference to the buffer itself as the BLI unpin * processing requires accessing the buffer after the BLI has dropped the final * BLI reference. See xfs_buf_item_unpin() for an explanation. * If unpins race to drop the final BLI reference and only the * BLI owns a reference to the buffer, then the loser of the race can have the * buffer fgreed from under it (e.g. on shutdown). Taking a buffer reference per * pin count ensures the life cycle of the buffer extends for as * long as we hold the buffer pin reference in xfs_buf_item_unpin(). */ STATIC void xfs_buf_item_pin( struct xfs_log_item *lip) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); ASSERT(atomic_read(&bip->bli_refcount) > 0); ASSERT((bip->bli_flags & XFS_BLI_LOGGED) || (bip->bli_flags & XFS_BLI_ORDERED) || (bip->bli_flags & XFS_BLI_STALE)); trace_xfs_buf_item_pin(bip); xfs_buf_hold(bip->bli_buf); atomic_inc(&bip->bli_refcount); atomic_inc(&bip->bli_buf->b_pin_count); } /* * For a stale BLI, process all the necessary completions that must be * performed when the final BLI reference goes away. The buffer will be * referenced and locked here - we return to the caller with the buffer still * referenced and locked for them to finalise processing of the buffer. */ static void xfs_buf_item_finish_stale( struct xfs_buf_log_item *bip) { struct xfs_buf *bp = bip->bli_buf; struct xfs_log_item *lip = &bip->bli_item; ASSERT(bip->bli_flags & XFS_BLI_STALE); ASSERT(xfs_buf_islocked(bp)); ASSERT(bp->b_flags & XBF_STALE); ASSERT(bip->__bli_format.blf_flags & XFS_BLF_CANCEL); ASSERT(list_empty(&lip->li_trans)); ASSERT(!bp->b_transp); if (bip->bli_flags & XFS_BLI_STALE_INODE) { xfs_buf_item_done(bp); xfs_buf_inode_iodone(bp); ASSERT(list_empty(&bp->b_li_list)); return; } /* * We may or may not be on the AIL here, xfs_trans_ail_delete() will do * the right thing regardless of the situation in which we are called. */ xfs_trans_ail_delete(lip, SHUTDOWN_LOG_IO_ERROR); xfs_buf_item_relse(bip); ASSERT(bp->b_log_item == NULL); } /* * This is called to unpin the buffer associated with the buf log item which was * previously pinned with a call to xfs_buf_item_pin(). We enter this function * with a buffer pin count, a buffer reference and a BLI reference. * * We must drop the BLI reference before we unpin the buffer because the AIL * doesn't acquire a BLI reference whenever it accesses it. Therefore if the * refcount drops to zero, the bli could still be AIL resident and the buffer * submitted for I/O at any point before we return. This can result in IO * completion freeing the buffer while we are still trying to access it here. * This race condition can also occur in shutdown situations where we abort and * unpin buffers from contexts other that journal IO completion. * * Hence we have to hold a buffer reference per pin count to ensure that the * buffer cannot be freed until we have finished processing the unpin operation. * The reference is taken in xfs_buf_item_pin(), and we must hold it until we * are done processing the buffer state. In the case of an abort (remove = * true) then we re-use the current pin reference as the IO reference we hand * off to IO failure handling. */ STATIC void xfs_buf_item_unpin( struct xfs_log_item *lip, int remove) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; int stale = bip->bli_flags & XFS_BLI_STALE; int freed; ASSERT(bp->b_log_item == bip); ASSERT(atomic_read(&bip->bli_refcount) > 0); trace_xfs_buf_item_unpin(bip); freed = atomic_dec_and_test(&bip->bli_refcount); if (atomic_dec_and_test(&bp->b_pin_count)) wake_up_all(&bp->b_waiters); /* * Nothing to do but drop the buffer pin reference if the BLI is * still active. */ if (!freed) { xfs_buf_rele(bp); return; } if (stale) { trace_xfs_buf_item_unpin_stale(bip); /* * The buffer has been locked and referenced since it was marked * stale so we own both lock and reference exclusively here. We * do not need the pin reference any more, so drop it now so * that we only have one reference to drop once item completion * processing is complete. */ xfs_buf_rele(bp); xfs_buf_item_finish_stale(bip); xfs_buf_relse(bp); return; } if (remove) { /* * We need to simulate an async IO failures here to ensure that * the correct error completion is run on this buffer. This * requires a reference to the buffer and for the buffer to be * locked. We can safely pass ownership of the pin reference to * the IO to ensure that nothing can free the buffer while we * wait for the lock and then run the IO failure completion. */ xfs_buf_lock(bp); bp->b_flags |= XBF_ASYNC; xfs_buf_ioend_fail(bp); return; } /* * BLI has no more active references - it will be moved to the AIL to * manage the remaining BLI/buffer life cycle. There is nothing left for * us to do here so drop the pin reference to the buffer. */ xfs_buf_rele(bp); } STATIC uint xfs_buf_item_push( struct xfs_log_item *lip, struct list_head *buffer_list) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; uint rval = XFS_ITEM_SUCCESS; if (xfs_buf_ispinned(bp)) return XFS_ITEM_PINNED; if (!xfs_buf_trylock(bp)) { /* * If we have just raced with a buffer being pinned and it has * been marked stale, we could end up stalling until someone else * issues a log force to unpin the stale buffer. Check for the * race condition here so xfsaild recognizes the buffer is pinned * and queues a log force to move it along. */ if (xfs_buf_ispinned(bp)) return XFS_ITEM_PINNED; return XFS_ITEM_LOCKED; } ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); trace_xfs_buf_item_push(bip); /* has a previous flush failed due to IO errors? */ if (bp->b_flags & XBF_WRITE_FAIL) { xfs_buf_alert_ratelimited(bp, "XFS: Failing async write", "Failing async write on buffer block 0x%llx. Retrying async write.", (long long)xfs_buf_daddr(bp)); } if (!xfs_buf_delwri_queue(bp, buffer_list)) rval = XFS_ITEM_FLUSHING; xfs_buf_unlock(bp); return rval; } /* * Drop the buffer log item refcount and take appropriate action. This helper * determines whether the bli must be freed or not, since a decrement to zero * does not necessarily mean the bli is unused. */ void xfs_buf_item_put( struct xfs_buf_log_item *bip) { ASSERT(xfs_buf_islocked(bip->bli_buf)); /* drop the bli ref and return if it wasn't the last one */ if (!atomic_dec_and_test(&bip->bli_refcount)) return; /* If the BLI is in the AIL, then it is still dirty and in use */ if (test_bit(XFS_LI_IN_AIL, &bip->bli_item.li_flags)) { ASSERT(bip->bli_flags & XFS_BLI_DIRTY); return; } /* * In shutdown conditions, we can be asked to free a dirty BLI that * isn't in the AIL. This can occur due to a checkpoint aborting a BLI * instead of inserting it into the AIL at checkpoint IO completion. If * there's another bli reference (e.g. a btree cursor holds a clean * reference) and it is released via xfs_trans_brelse(), we can get here * with that aborted, dirty BLI. In this case, it is safe to free the * dirty BLI immediately, as it is not in the AIL and there are no * other references to it. * * We should never get here with a stale BLI via that path as * xfs_trans_brelse() specifically holds onto stale buffers rather than * releasing them. */ ASSERT(!(bip->bli_flags & XFS_BLI_DIRTY) || test_bit(XFS_LI_ABORTED, &bip->bli_item.li_flags)); ASSERT(!(bip->bli_flags & XFS_BLI_STALE)); xfs_buf_item_relse(bip); } /* * Release the buffer associated with the buf log item. If there is no dirty * logged data associated with the buffer recorded in the buf log item, then * free the buf log item and remove the reference to it in the buffer. * * This call ignores the recursion count. It is only called when the buffer * should REALLY be unlocked, regardless of the recursion count. * * We unconditionally drop the transaction's reference to the log item. If the * item was logged, then another reference was taken when it was pinned, so we * can safely drop the transaction reference now. This also allows us to avoid * potential races with the unpin code freeing the bli by not referencing the * bli after we've dropped the reference count. * * If the XFS_BLI_HOLD flag is set in the buf log item, then free the log item * if necessary but do not unlock the buffer. This is for support of * xfs_trans_bhold(). Make sure the XFS_BLI_HOLD field is cleared if we don't * free the item. * * If the XFS_BLI_STALE flag is set, the last reference to the BLI *must* * perform a completion abort of any objects attached to the buffer for IO * tracking purposes. This generally only happens in shutdown situations, * normally xfs_buf_item_unpin() will drop the last BLI reference and perform * completion processing. However, because transaction completion can race with * checkpoint completion during a shutdown, this release context may end up * being the last active reference to the BLI and so needs to perform this * cleanup. */ STATIC void xfs_buf_item_release( struct xfs_log_item *lip) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; bool hold = bip->bli_flags & XFS_BLI_HOLD; bool stale = bip->bli_flags & XFS_BLI_STALE; bool aborted = test_bit(XFS_LI_ABORTED, &lip->li_flags); bool dirty = bip->bli_flags & XFS_BLI_DIRTY; #if defined(DEBUG) || defined(XFS_WARN) bool ordered = bip->bli_flags & XFS_BLI_ORDERED; #endif trace_xfs_buf_item_release(bip); ASSERT(xfs_buf_islocked(bp)); /* * The bli dirty state should match whether the blf has logged segments * except for ordered buffers, where only the bli should be dirty. */ ASSERT((!ordered && dirty == xfs_buf_item_dirty_format(bip)) || (ordered && dirty && !xfs_buf_item_dirty_format(bip))); ASSERT(!stale || (bip->__bli_format.blf_flags & XFS_BLF_CANCEL)); /* * Clear the buffer's association with this transaction and * per-transaction state from the bli, which has been copied above. */ bp->b_transp = NULL; bip->bli_flags &= ~(XFS_BLI_LOGGED | XFS_BLI_HOLD | XFS_BLI_ORDERED); /* If there are other references, then we have nothing to do. */ if (!atomic_dec_and_test(&bip->bli_refcount)) goto out_release; /* * Stale buffer completion frees the BLI, unlocks and releases the * buffer. Neither the BLI or buffer are safe to reference after this * call, so there's nothing more we need to do here. * * If we get here with a stale buffer and references to the BLI remain, * we must not unlock the buffer as the last BLI reference owns lock * context, not us. */ if (stale) { xfs_buf_item_finish_stale(bip); xfs_buf_relse(bp); ASSERT(!hold); return; } /* * Dirty or clean, aborted items are done and need to be removed from * the AIL and released. This frees the BLI, but leaves the buffer * locked and referenced. */ if (aborted || xlog_is_shutdown(lip->li_log)) { ASSERT(list_empty(&bip->bli_buf->b_li_list)); xfs_buf_item_done(bp); goto out_release; } /* * Clean, unreferenced BLIs can be immediately freed, leaving the buffer * locked and referenced. * * Dirty, unreferenced BLIs *must* be in the AIL awaiting writeback. */ if (!dirty) xfs_buf_item_relse(bip); else ASSERT(test_bit(XFS_LI_IN_AIL, &lip->li_flags)); /* Not safe to reference the BLI from here */ out_release: /* * If we get here with a stale buffer, we must not unlock the * buffer as the last BLI reference owns lock context, not us. */ if (stale || hold) return; xfs_buf_relse(bp); } STATIC void xfs_buf_item_committing( struct xfs_log_item *lip, xfs_csn_t seq) { return xfs_buf_item_release(lip); } /* * This is called to find out where the oldest active copy of the * buf log item in the on disk log resides now that the last log * write of it completed at the given lsn. * We always re-log all the dirty data in a buffer, so usually the * latest copy in the on disk log is the only one that matters. For * those cases we simply return the given lsn. * * The one exception to this is for buffers full of newly allocated * inodes. These buffers are only relogged with the XFS_BLI_INODE_BUF * flag set, indicating that only the di_next_unlinked fields from the * inodes in the buffers will be replayed during recovery. If the * original newly allocated inode images have not yet been flushed * when the buffer is so relogged, then we need to make sure that we * keep the old images in the 'active' portion of the log. We do this * by returning the original lsn of that transaction here rather than * the current one. */ STATIC xfs_lsn_t xfs_buf_item_committed( struct xfs_log_item *lip, xfs_lsn_t lsn) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); trace_xfs_buf_item_committed(bip); if ((bip->bli_flags & XFS_BLI_INODE_ALLOC_BUF) && lip->li_lsn != 0) return lip->li_lsn; return lsn; } #ifdef DEBUG_EXPENSIVE static int xfs_buf_item_precommit( struct xfs_trans *tp, struct xfs_log_item *lip) { struct xfs_buf_log_item *bip = BUF_ITEM(lip); struct xfs_buf *bp = bip->bli_buf; struct xfs_mount *mp = bp->b_mount; xfs_failaddr_t fa; if (!bp->b_ops || !bp->b_ops->verify_struct) return 0; if (bip->bli_flags & XFS_BLI_STALE) return 0; fa = bp->b_ops->verify_struct(bp); if (fa) { xfs_buf_verifier_error(bp, -EFSCORRUPTED, bp->b_ops->name, bp->b_addr, BBTOB(bp->b_length), fa); xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); ASSERT(fa == NULL); } return 0; } #else # define xfs_buf_item_precommit NULL #endif static const struct xfs_item_ops xfs_buf_item_ops = { .iop_size = xfs_buf_item_size, .iop_precommit = xfs_buf_item_precommit, .iop_format = xfs_buf_item_format, .iop_pin = xfs_buf_item_pin, .iop_unpin = xfs_buf_item_unpin, .iop_release = xfs_buf_item_release, .iop_committing = xfs_buf_item_committing, .iop_committed = xfs_buf_item_committed, .iop_push = xfs_buf_item_push, }; /* * Allocate a new buf log item to go with the given buffer. * Set the buffer's b_log_item field to point to the new * buf log item. */ int xfs_buf_item_init( struct xfs_buf *bp, struct xfs_mount *mp) { struct xfs_buf_log_item *bip = bp->b_log_item; int chunks; int map_size; int i; /* * Check to see if there is already a buf log item for * this buffer. If we do already have one, there is * nothing to do here so return. */ ASSERT(bp->b_mount == mp); if (bip) { ASSERT(bip->bli_item.li_type == XFS_LI_BUF); ASSERT(!bp->b_transp); ASSERT(bip->bli_buf == bp); return 0; } bip = kmem_cache_zalloc(xfs_buf_item_cache, GFP_KERNEL | __GFP_NOFAIL); xfs_log_item_init(mp, &bip->bli_item, XFS_LI_BUF, &xfs_buf_item_ops); bip->bli_buf = bp; /* * chunks is the number of XFS_BLF_CHUNK size pieces the buffer * can be divided into. Make sure not to truncate any pieces. * map_size is the size of the bitmap needed to describe the * chunks of the buffer. * * Discontiguous buffer support follows the layout of the underlying * buffer. This makes the implementation as simple as possible. */ xfs_buf_item_get_format(bip, bp->b_map_count); for (i = 0; i < bip->bli_format_count; i++) { chunks = DIV_ROUND_UP(BBTOB(bp->b_maps[i].bm_len), XFS_BLF_CHUNK); map_size = DIV_ROUND_UP(chunks, NBWORD); if (map_size > XFS_BLF_DATAMAP_SIZE) { kmem_cache_free(xfs_buf_item_cache, bip); xfs_err(mp, "buffer item dirty bitmap (%u uints) too small to reflect %u bytes!", map_size, BBTOB(bp->b_maps[i].bm_len)); return -EFSCORRUPTED; } bip->bli_formats[i].blf_type = XFS_LI_BUF; bip->bli_formats[i].blf_blkno = bp->b_maps[i].bm_bn; bip->bli_formats[i].blf_len = bp->b_maps[i].bm_len; bip->bli_formats[i].blf_map_size = map_size; } bp->b_log_item = bip; xfs_buf_hold(bp); return 0; } /* * Mark bytes first through last inclusive as dirty in the buf * item's bitmap. */ static void xfs_buf_item_log_segment( uint first, uint last, uint *map) { uint first_bit; uint last_bit; uint bits_to_set; uint bits_set; uint word_num; uint *wordp; uint bit; uint end_bit; uint mask; ASSERT(first < XFS_BLF_DATAMAP_SIZE * XFS_BLF_CHUNK * NBWORD); ASSERT(last < XFS_BLF_DATAMAP_SIZE * XFS_BLF_CHUNK * NBWORD); /* * Convert byte offsets to bit numbers. */ first_bit = first >> XFS_BLF_SHIFT; last_bit = last >> XFS_BLF_SHIFT; /* * Calculate the total number of bits to be set. */ bits_to_set = last_bit - first_bit + 1; /* * Get a pointer to the first word in the bitmap * to set a bit in. */ word_num = first_bit >> BIT_TO_WORD_SHIFT; wordp = &map[word_num]; /* * Calculate the starting bit in the first word. */ bit = first_bit & (uint)(NBWORD - 1); /* * First set any bits in the first word of our range. * If it starts at bit 0 of the word, it will be * set below rather than here. That is what the variable * bit tells us. The variable bits_set tracks the number * of bits that have been set so far. End_bit is the number * of the last bit to be set in this word plus one. */ if (bit) { end_bit = min(bit + bits_to_set, (uint)NBWORD); mask = ((1U << (end_bit - bit)) - 1) << bit; *wordp |= mask; wordp++; bits_set = end_bit - bit; } else { bits_set = 0; } /* * Now set bits a whole word at a time that are between * first_bit and last_bit. */ while ((bits_to_set - bits_set) >= NBWORD) { *wordp = 0xffffffff; bits_set += NBWORD; wordp++; } /* * Finally, set any bits left to be set in one last partial word. */ end_bit = bits_to_set - bits_set; if (end_bit) { mask = (1U << end_bit) - 1; *wordp |= mask; } } /* * Mark bytes first through last inclusive as dirty in the buf * item's bitmap. */ void xfs_buf_item_log( struct xfs_buf_log_item *bip, uint first, uint last) { int i; uint start; uint end; struct xfs_buf *bp = bip->bli_buf; /* * walk each buffer segment and mark them dirty appropriately. */ start = 0; for (i = 0; i < bip->bli_format_count; i++) { if (start > last) break; end = start + BBTOB(bp->b_maps[i].bm_len) - 1; /* skip to the map that includes the first byte to log */ if (first > end) { start += BBTOB(bp->b_maps[i].bm_len); continue; } /* * Trim the range to this segment and mark it in the bitmap. * Note that we must convert buffer offsets to segment relative * offsets (e.g., the first byte of each segment is byte 0 of * that segment). */ if (first < start) first = start; if (end > last) end = last; xfs_buf_item_log_segment(first - start, end - start, &bip->bli_formats[i].blf_data_map[0]); start += BBTOB(bp->b_maps[i].bm_len); } } /* * Return true if the buffer has any ranges logged/dirtied by a transaction, * false otherwise. */ bool xfs_buf_item_dirty_format( struct xfs_buf_log_item *bip) { int i; for (i = 0; i < bip->bli_format_count; i++) { if (!xfs_bitmap_empty(bip->bli_formats[i].blf_data_map, bip->bli_formats[i].blf_map_size)) return true; } return false; } void xfs_buf_item_done( struct xfs_buf *bp) { /* * If we are forcibly shutting down, this may well be off the AIL * already. That's because we simulate the log-committed callbacks to * unpin these buffers. Or we may never have put this item on AIL * because of the transaction was aborted forcibly. * xfs_trans_ail_delete() takes care of these. * * Either way, AIL is useless if we're forcing a shutdown. * * Note that log recovery writes might have buffer items that are not on * the AIL even when the file system is not shut down. */ xfs_trans_ail_delete(&bp->b_log_item->bli_item, (bp->b_flags & _XBF_LOGRECOVERY) ? 0 : SHUTDOWN_CORRUPT_INCORE); xfs_buf_item_relse(bp->b_log_item); } |
| 142 18 170 1 171 8 8 8 8 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 | /* 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 <linux/device.h> #include <linux/etherdevice.h> #include <linux/mutex.h> #include <linux/netdevice.h> #include <linux/notifier.h> #include <linux/types.h> #include <linux/workqueue.h> #include <linux/xarray.h> #include <net/devlink.h> #include <net/net_namespace.h> #include <net/rtnetlink.h> #include <rdma/ib_verbs.h> #include "netlink_gen.h" struct devlink_rel; #define DEVLINK_REGISTERED XA_MARK_1 #define DEVLINK_RELOAD_STATS_ARRAY_SIZE \ (__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX) struct devlink_dev_stats { u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE]; }; struct devlink { u32 index; struct xarray ports; struct list_head rate_list; struct list_head sb_list; struct list_head dpipe_table_list; struct list_head resource_list; struct xarray params; struct list_head region_list; struct list_head reporter_list; struct devlink_dpipe_headers *dpipe_headers; struct list_head trap_list; struct list_head trap_group_list; struct list_head trap_policer_list; struct list_head linecard_list; const struct devlink_ops *ops; struct xarray snapshot_ids; struct devlink_dev_stats stats; struct device *dev; possible_net_t _net; /* Serializes access to devlink instance specific objects such as * port, sb, dpipe, resource, params, region, traps and more. */ struct mutex lock; struct lock_class_key lock_key; u8 reload_failed:1; refcount_t refcount; struct rcu_work rwork; struct devlink_rel *rel; struct xarray nested_rels; char priv[] __aligned(NETDEV_ALIGN); }; extern struct xarray devlinks; extern struct genl_family devlink_nl_family; /* devlink instances are open to the access from the user space after * devlink_register() call. Such logical barrier allows us to have certain * expectations related to locking. * * Before *_register() - we are in initialization stage and no parallel * access possible to the devlink instance. All drivers perform that phase * by implicitly holding device_lock. * * After *_register() - users and driver can access devlink instance at * the same time. */ #define ASSERT_DEVLINK_REGISTERED(d) \ WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) #define ASSERT_DEVLINK_NOT_REGISTERED(d) \ WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED)) /* Iterate over devlink pointers which were possible to get reference to. * devlink_put() needs to be called for each iterated devlink pointer * in loop body in order to release the reference. */ #define devlinks_xa_for_each_registered_get(net, index, devlink) \ for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++) struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp); static inline bool __devl_is_registered(struct devlink *devlink) { return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED); } static inline bool devl_is_registered(struct devlink *devlink) { devl_assert_locked(devlink); return __devl_is_registered(devlink); } static inline void devl_dev_lock(struct devlink *devlink, bool dev_lock) { if (dev_lock) device_lock(devlink->dev); devl_lock(devlink); } static inline void devl_dev_unlock(struct devlink *devlink, bool dev_lock) { devl_unlock(devlink); if (dev_lock) device_unlock(devlink->dev); } typedef void devlink_rel_notify_cb_t(struct devlink *devlink, u32 obj_index); typedef void devlink_rel_cleanup_cb_t(struct devlink *devlink, u32 obj_index, u32 rel_index); void devlink_rel_nested_in_clear(u32 rel_index); int devlink_rel_nested_in_add(u32 *rel_index, u32 devlink_index, u32 obj_index, devlink_rel_notify_cb_t *notify_cb, devlink_rel_cleanup_cb_t *cleanup_cb, struct devlink *devlink); void devlink_rel_nested_in_notify(struct devlink *devlink); int devlink_rel_devlink_handle_put(struct sk_buff *msg, struct devlink *devlink, u32 rel_index, int attrtype, bool *msg_updated); /* Netlink */ enum devlink_multicast_groups { DEVLINK_MCGRP_CONFIG, }; /* state held across netlink dumps */ struct devlink_nl_dump_state { unsigned long instance; int idx; union { /* DEVLINK_CMD_REGION_READ */ struct { u64 start_offset; }; /* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */ struct { u64 dump_ts; }; }; }; typedef int devlink_nl_dump_one_func_t(struct sk_buff *msg, struct devlink *devlink, struct netlink_callback *cb, int flags); struct devlink * devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs, bool dev_lock); int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb, devlink_nl_dump_one_func_t *dump_one); static inline struct devlink_nl_dump_state * devlink_dump_state(struct netlink_callback *cb) { NL_ASSERT_CTX_FITS(struct devlink_nl_dump_state); return (struct devlink_nl_dump_state *)cb->ctx; } static inline int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink) { if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name)) return -EMSGSIZE; if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev))) return -EMSGSIZE; return 0; } static inline int devlink_nl_put_u64(struct sk_buff *msg, int attrtype, u64 val) { return nla_put_u64_64bit(msg, attrtype, val, DEVLINK_ATTR_PAD); } int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net, struct devlink *devlink, int attrtype); int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info); static inline bool devlink_nl_notify_need(struct devlink *devlink) { return genl_has_listeners(&devlink_nl_family, devlink_net(devlink), DEVLINK_MCGRP_CONFIG); } struct devlink_obj_desc { struct rcu_head rcu; const char *bus_name; const char *dev_name; unsigned int port_index; bool port_index_valid; long data[]; }; static inline void devlink_nl_obj_desc_init(struct devlink_obj_desc *desc, struct devlink *devlink) { memset(desc, 0, sizeof(*desc)); desc->bus_name = devlink->dev->bus->name; desc->dev_name = dev_name(devlink->dev); } static inline void devlink_nl_obj_desc_port_set(struct devlink_obj_desc *desc, struct devlink_port *devlink_port) { desc->port_index = devlink_port->index; desc->port_index_valid = true; } int devlink_nl_notify_filter(struct sock *dsk, struct sk_buff *skb, void *data); static inline void devlink_nl_notify_send_desc(struct devlink *devlink, struct sk_buff *msg, struct devlink_obj_desc *desc) { genlmsg_multicast_netns_filtered(&devlink_nl_family, devlink_net(devlink), msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL, devlink_nl_notify_filter, desc); } static inline void devlink_nl_notify_send(struct devlink *devlink, struct sk_buff *msg) { struct devlink_obj_desc desc; devlink_nl_obj_desc_init(&desc, devlink); devlink_nl_notify_send_desc(devlink, msg, &desc); } /* Notify */ void devlink_notify_register(struct devlink *devlink); void devlink_notify_unregister(struct devlink *devlink); void devlink_ports_notify_register(struct devlink *devlink); void devlink_ports_notify_unregister(struct devlink *devlink); void devlink_params_notify_register(struct devlink *devlink); void devlink_params_notify_unregister(struct devlink *devlink); void devlink_regions_notify_register(struct devlink *devlink); void devlink_regions_notify_unregister(struct devlink *devlink); void devlink_trap_policers_notify_register(struct devlink *devlink); void devlink_trap_policers_notify_unregister(struct devlink *devlink); void devlink_trap_groups_notify_register(struct devlink *devlink); void devlink_trap_groups_notify_unregister(struct devlink *devlink); void devlink_traps_notify_register(struct devlink *devlink); void devlink_traps_notify_unregister(struct devlink *devlink); void devlink_rates_notify_register(struct devlink *devlink); void devlink_rates_notify_unregister(struct devlink *devlink); void devlink_linecards_notify_register(struct devlink *devlink); void devlink_linecards_notify_unregister(struct devlink *devlink); /* Ports */ #define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \ WARN_ON_ONCE(!(devlink_port)->initialized) struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, unsigned int port_index); int devlink_port_netdevice_event(struct notifier_block *nb, unsigned long event, void *ptr); struct devlink_port * devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info); struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, struct nlattr **attrs); /* Reload */ bool devlink_reload_actions_valid(const struct devlink_ops *ops); int devlink_reload(struct devlink *devlink, struct net *dest_net, enum devlink_reload_action action, enum devlink_reload_limit limit, u32 *actions_performed, struct netlink_ext_ack *extack); static inline bool devlink_reload_supported(const struct devlink_ops *ops) { return ops->reload_down && ops->reload_up; } /* Params */ void devlink_params_driverinit_load_new(struct devlink *devlink); /* Resources */ struct devlink_resource; int devlink_resources_validate(struct devlink *devlink, struct devlink_resource *resource, struct genl_info *info); /* Rates */ int devlink_rate_nodes_check(struct devlink *devlink, u16 mode, struct netlink_ext_ack *extack); /* Linecards */ unsigned int devlink_linecard_index(struct devlink_linecard *linecard); |
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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 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All of * them return 0 On success and 1 otherwise. * * Copyright (c) 1997 by Procom Technology, Inc. * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> * * This program can be redistributed or modified under the terms of the * GNU General Public License as published by the Free Software Foundation. * This program is distributed without any warranty or implied warranty * of merchantability or fitness for a particular purpose. * * See the GNU General Public License for more details. */ #include <linux/netdevice.h> #include <linux/slab.h> #include <net/llc_conn.h> #include <net/llc_sap.h> #include <net/sock.h> #include <net/llc_c_ev.h> #include <net/llc_c_ac.h> #include <net/llc_c_st.h> #include <net/llc_pdu.h> #include <net/llc.h> static int llc_conn_ac_inc_vs_by_1(struct sock *sk, struct sk_buff *skb); static void llc_process_tmr_ev(struct sock *sk, struct sk_buff *skb); static int llc_conn_ac_data_confirm(struct sock *sk, struct sk_buff *ev); static int llc_conn_ac_inc_npta_value(struct sock *sk, struct sk_buff *skb); static int llc_conn_ac_send_rr_rsp_f_set_ackpf(struct sock *sk, struct sk_buff *skb); static int llc_conn_ac_set_p_flag_1(struct sock *sk, struct sk_buff *skb); #define INCORRECT 0 int llc_conn_ac_clear_remote_busy(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (llc->remote_busy_flag) { u8 nr; struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); llc->remote_busy_flag = 0; timer_delete(&llc->busy_state_timer.timer); nr = LLC_I_GET_NR(pdu); llc_conn_resend_i_pdu_as_cmd(sk, nr, 0); } return 0; } int llc_conn_ac_conn_ind(struct sock *sk, struct sk_buff *skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); ev->ind_prim = LLC_CONN_PRIM; return 0; } int llc_conn_ac_conn_confirm(struct sock *sk, struct sk_buff *skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); ev->cfm_prim = LLC_CONN_PRIM; return 0; } static int llc_conn_ac_data_confirm(struct sock *sk, struct sk_buff *skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); ev->cfm_prim = LLC_DATA_PRIM; return 0; } int llc_conn_ac_data_ind(struct sock *sk, struct sk_buff *skb) { llc_conn_rtn_pdu(sk, skb); return 0; } int llc_conn_ac_disc_ind(struct sock *sk, struct sk_buff *skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); u8 reason = 0; int rc = 0; if (ev->type == LLC_CONN_EV_TYPE_PDU) { struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); if (LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) && LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_DM) reason = LLC_DISC_REASON_RX_DM_RSP_PDU; else if (LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_U(pdu) && LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_DISC) reason = LLC_DISC_REASON_RX_DISC_CMD_PDU; } else if (ev->type == LLC_CONN_EV_TYPE_ACK_TMR) reason = LLC_DISC_REASON_ACK_TMR_EXP; else rc = -EINVAL; if (!rc) { ev->reason = reason; ev->ind_prim = LLC_DISC_PRIM; } return rc; } int llc_conn_ac_disc_confirm(struct sock *sk, struct sk_buff *skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); ev->reason = ev->status; ev->cfm_prim = LLC_DISC_PRIM; return 0; } int llc_conn_ac_rst_ind(struct sock *sk, struct sk_buff *skb) { u8 reason = 0; int rc = 1; struct llc_conn_state_ev *ev = llc_conn_ev(skb); struct llc_pdu_un *pdu = llc_pdu_un_hdr(skb); struct llc_sock *llc = llc_sk(sk); switch (ev->type) { case LLC_CONN_EV_TYPE_PDU: if (LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_U(pdu) && LLC_U_PDU_RSP(pdu) == LLC_2_PDU_RSP_FRMR) { reason = LLC_RESET_REASON_LOCAL; rc = 0; } else if (LLC_PDU_IS_CMD(pdu) && LLC_PDU_TYPE_IS_U(pdu) && LLC_U_PDU_CMD(pdu) == LLC_2_PDU_CMD_SABME) { reason = LLC_RESET_REASON_REMOTE; rc = 0; } break; case LLC_CONN_EV_TYPE_ACK_TMR: case LLC_CONN_EV_TYPE_P_TMR: case LLC_CONN_EV_TYPE_REJ_TMR: case LLC_CONN_EV_TYPE_BUSY_TMR: if (llc->retry_count > llc->n2) { reason = LLC_RESET_REASON_LOCAL; rc = 0; } break; } if (!rc) { ev->reason = reason; ev->ind_prim = LLC_RESET_PRIM; } return rc; } int llc_conn_ac_rst_confirm(struct sock *sk, struct sk_buff *skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); ev->reason = 0; ev->cfm_prim = LLC_RESET_PRIM; return 0; } int llc_conn_ac_clear_remote_busy_if_f_eq_1(struct sock *sk, struct sk_buff *skb) { struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); if (LLC_PDU_IS_RSP(pdu) && LLC_PDU_TYPE_IS_I(pdu) && LLC_I_PF_IS_1(pdu) && llc_sk(sk)->ack_pf) llc_conn_ac_clear_remote_busy(sk, skb); return 0; } int llc_conn_ac_stop_rej_tmr_if_data_flag_eq_2(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (llc->data_flag == 2) timer_delete(&llc->rej_sent_timer.timer); return 0; } int llc_conn_ac_send_disc_cmd_p_set_x(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_disc_cmd(nskb, 1); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); llc_conn_ac_set_p_flag_1(sk, skb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_dm_rsp_f_set_p(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0); if (nskb) { struct llc_sap *sap = llc->sap; u8 f_bit; llc_pdu_decode_pf_bit(skb, &f_bit); llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_dm_rsp(nskb, f_bit); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_dm_rsp_f_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_dm_rsp(nskb, 1); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_frmr_rsp_f_set_x(struct sock *sk, struct sk_buff *skb) { u8 f_bit; int rc = -ENOBUFS; struct sk_buff *nskb; struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); struct llc_sock *llc = llc_sk(sk); llc->rx_pdu_hdr = *((u32 *)pdu); if (LLC_PDU_IS_CMD(pdu)) llc_pdu_decode_pf_bit(skb, &f_bit); else f_bit = 0; nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, sizeof(struct llc_frmr_info)); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_frmr_rsp(nskb, pdu, f_bit, llc->vS, llc->vR, INCORRECT); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_resend_frmr_rsp_f_set_0(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, sizeof(struct llc_frmr_info)); if (nskb) { struct llc_sap *sap = llc->sap; struct llc_pdu_sn *pdu = (struct llc_pdu_sn *)&llc->rx_pdu_hdr; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_frmr_rsp(nskb, pdu, 0, llc->vS, llc->vR, INCORRECT); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_resend_frmr_rsp_f_set_p(struct sock *sk, struct sk_buff *skb) { u8 f_bit; int rc = -ENOBUFS; struct sk_buff *nskb; struct llc_sock *llc = llc_sk(sk); llc_pdu_decode_pf_bit(skb, &f_bit); nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, sizeof(struct llc_frmr_info)); if (nskb) { struct llc_sap *sap = llc->sap; struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_frmr_rsp(nskb, pdu, f_bit, llc->vS, llc->vR, INCORRECT); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_i_cmd_p_set_1(struct sock *sk, struct sk_buff *skb) { int rc; struct llc_sock *llc = llc_sk(sk); struct llc_sap *sap = llc->sap; llc_pdu_header_init(skb, LLC_PDU_TYPE_I, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_i_cmd(skb, 1, llc->vS, llc->vR); rc = llc_mac_hdr_init(skb, llc->dev->dev_addr, llc->daddr.mac); if (likely(!rc)) { skb_get(skb); llc_conn_send_pdu(sk, skb); llc_conn_ac_inc_vs_by_1(sk, skb); } return rc; } static int llc_conn_ac_send_i_cmd_p_set_0(struct sock *sk, struct sk_buff *skb) { int rc; struct llc_sock *llc = llc_sk(sk); struct llc_sap *sap = llc->sap; llc_pdu_header_init(skb, LLC_PDU_TYPE_I, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_i_cmd(skb, 0, llc->vS, llc->vR); rc = llc_mac_hdr_init(skb, llc->dev->dev_addr, llc->daddr.mac); if (likely(!rc)) { skb_get(skb); llc_conn_send_pdu(sk, skb); llc_conn_ac_inc_vs_by_1(sk, skb); } return rc; } int llc_conn_ac_send_i_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { int rc; struct llc_sock *llc = llc_sk(sk); struct llc_sap *sap = llc->sap; llc_pdu_header_init(skb, LLC_PDU_TYPE_I, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_i_cmd(skb, 0, llc->vS, llc->vR); rc = llc_mac_hdr_init(skb, llc->dev->dev_addr, llc->daddr.mac); if (likely(!rc)) { skb_get(skb); llc_conn_send_pdu(sk, skb); llc_conn_ac_inc_vs_by_1(sk, skb); } return 0; } int llc_conn_ac_resend_i_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); u8 nr = LLC_I_GET_NR(pdu); llc_conn_resend_i_pdu_as_cmd(sk, nr, 0); return 0; } int llc_conn_ac_resend_i_xxx_x_set_0_or_send_rr(struct sock *sk, struct sk_buff *skb) { u8 nr; struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rr_rsp(nskb, 0, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (likely(!rc)) llc_conn_send_pdu(sk, nskb); else kfree_skb(skb); } if (rc) { nr = LLC_I_GET_NR(pdu); rc = 0; llc_conn_resend_i_pdu_as_cmd(sk, nr, 0); } return rc; } int llc_conn_ac_resend_i_rsp_f_set_1(struct sock *sk, struct sk_buff *skb) { struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); u8 nr = LLC_I_GET_NR(pdu); llc_conn_resend_i_pdu_as_rsp(sk, nr, 1); return 0; } int llc_conn_ac_send_rej_cmd_p_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_rej_cmd(nskb, 1, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rej_rsp_f_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rej_rsp(nskb, 1, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rej_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rej_rsp(nskb, 0, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rnr_cmd_p_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_rnr_cmd(nskb, 1, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rnr_rsp_f_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rnr_rsp(nskb, 1, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rnr_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rnr_rsp(nskb, 0, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_set_remote_busy(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (!llc->remote_busy_flag) { llc->remote_busy_flag = 1; mod_timer(&llc->busy_state_timer.timer, jiffies + llc->busy_state_timer.expire); } return 0; } int llc_conn_ac_opt_send_rnr_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rnr_rsp(nskb, 0, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rr_cmd_p_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_rr_cmd(nskb, 1, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rr_rsp_f_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; u8 f_bit = 1; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rr_rsp(nskb, f_bit, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_ack_rsp_f_set_1(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rr_rsp(nskb, 1, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_rr_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rr_rsp(nskb, 0, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_ack_xxx_x_set_0(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rr_rsp(nskb, 0, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } void llc_conn_set_p_flag(struct sock *sk, u8 value) { int state_changed = llc_sk(sk)->p_flag && !value; llc_sk(sk)->p_flag = value; if (state_changed) sk->sk_state_change(sk); } int llc_conn_ac_send_sabme_cmd_p_set_x(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0); if (nskb) { struct llc_sap *sap = llc->sap; const u8 *dmac = llc->daddr.mac; if (llc->dev->flags & IFF_LOOPBACK) dmac = llc->dev->dev_addr; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_CMD); llc_pdu_init_as_sabme_cmd(nskb, 1); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, dmac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); llc_conn_set_p_flag(sk, 1); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_send_ua_rsp_f_set_p(struct sock *sk, struct sk_buff *skb) { u8 f_bit; int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_U, 0); llc_pdu_decode_pf_bit(skb, &f_bit); if (nskb) { struct llc_sap *sap = llc->sap; nskb->dev = llc->dev; llc_pdu_header_init(nskb, LLC_PDU_TYPE_U, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_ua_rsp(nskb, f_bit); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } int llc_conn_ac_set_s_flag_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->s_flag = 0; return 0; } int llc_conn_ac_set_s_flag_1(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->s_flag = 1; return 0; } int llc_conn_ac_start_p_timer(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); llc_conn_set_p_flag(sk, 1); mod_timer(&llc->pf_cycle_timer.timer, jiffies + llc->pf_cycle_timer.expire); return 0; } /** * llc_conn_ac_send_ack_if_needed - check if ack is needed * @sk: current connection structure * @skb: current event * * Checks number of received PDUs which have not been acknowledged, yet, * If number of them reaches to "npta"(Number of PDUs To Acknowledge) then * sends an RR response as acknowledgement for them. Returns 0 for * success, 1 otherwise. */ int llc_conn_ac_send_ack_if_needed(struct sock *sk, struct sk_buff *skb) { u8 pf_bit; struct llc_sock *llc = llc_sk(sk); llc_pdu_decode_pf_bit(skb, &pf_bit); llc->ack_pf |= pf_bit & 1; if (!llc->ack_must_be_send) { llc->first_pdu_Ns = llc->vR; llc->ack_must_be_send = 1; llc->ack_pf = pf_bit & 1; } if (((llc->vR - llc->first_pdu_Ns + 1 + LLC_2_SEQ_NBR_MODULO) % LLC_2_SEQ_NBR_MODULO) >= llc->npta) { llc_conn_ac_send_rr_rsp_f_set_ackpf(sk, skb); llc->ack_must_be_send = 0; llc->ack_pf = 0; llc_conn_ac_inc_npta_value(sk, skb); } return 0; } /** * llc_conn_ac_rst_sendack_flag - resets ack_must_be_send flag * @sk: current connection structure * @skb: current event * * This action resets ack_must_be_send flag of given connection, this flag * indicates if there is any PDU which has not been acknowledged yet. * Returns 0 for success, 1 otherwise. */ int llc_conn_ac_rst_sendack_flag(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->ack_must_be_send = llc_sk(sk)->ack_pf = 0; return 0; } /** * llc_conn_ac_send_i_rsp_f_set_ackpf - acknowledge received PDUs * @sk: current connection structure * @skb: current event * * Sends an I response PDU with f-bit set to ack_pf flag as acknowledge to * all received PDUs which have not been acknowledged, yet. ack_pf flag is * set to one if one PDU with p-bit set to one is received. Returns 0 for * success, 1 otherwise. */ static int llc_conn_ac_send_i_rsp_f_set_ackpf(struct sock *sk, struct sk_buff *skb) { int rc; struct llc_sock *llc = llc_sk(sk); struct llc_sap *sap = llc->sap; llc_pdu_header_init(skb, LLC_PDU_TYPE_I, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_i_cmd(skb, llc->ack_pf, llc->vS, llc->vR); rc = llc_mac_hdr_init(skb, llc->dev->dev_addr, llc->daddr.mac); if (likely(!rc)) { skb_get(skb); llc_conn_send_pdu(sk, skb); llc_conn_ac_inc_vs_by_1(sk, skb); } return rc; } /** * llc_conn_ac_send_i_as_ack - sends an I-format PDU to acknowledge rx PDUs * @sk: current connection structure. * @skb: current event. * * This action sends an I-format PDU as acknowledge to received PDUs which * have not been acknowledged, yet, if there is any. By using of this * action number of acknowledgements decreases, this technic is called * piggy backing. Returns 0 for success, 1 otherwise. */ int llc_conn_ac_send_i_as_ack(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); int ret; if (llc->ack_must_be_send) { ret = llc_conn_ac_send_i_rsp_f_set_ackpf(sk, skb); llc->ack_must_be_send = 0 ; llc->ack_pf = 0; } else { ret = llc_conn_ac_send_i_cmd_p_set_0(sk, skb); } return ret; } /** * llc_conn_ac_send_rr_rsp_f_set_ackpf - ack all rx PDUs not yet acked * @sk: current connection structure. * @skb: current event. * * This action sends an RR response with f-bit set to ack_pf flag as * acknowledge to all received PDUs which have not been acknowledged, yet, * if there is any. ack_pf flag indicates if a PDU has been received with * p-bit set to one. Returns 0 for success, 1 otherwise. */ static int llc_conn_ac_send_rr_rsp_f_set_ackpf(struct sock *sk, struct sk_buff *skb) { int rc = -ENOBUFS; struct llc_sock *llc = llc_sk(sk); struct sk_buff *nskb = llc_alloc_frame(sk, llc->dev, LLC_PDU_TYPE_S, 0); if (nskb) { struct llc_sap *sap = llc->sap; llc_pdu_header_init(nskb, LLC_PDU_TYPE_S, sap->laddr.lsap, llc->daddr.lsap, LLC_PDU_RSP); llc_pdu_init_as_rr_rsp(nskb, llc->ack_pf, llc->vR); rc = llc_mac_hdr_init(nskb, llc->dev->dev_addr, llc->daddr.mac); if (unlikely(rc)) goto free; llc_conn_send_pdu(sk, nskb); } out: return rc; free: kfree_skb(nskb); goto out; } /** * llc_conn_ac_inc_npta_value - tries to make value of npta greater * @sk: current connection structure. * @skb: current event. * * After "inc_cntr" times calling of this action, "npta" increase by one. * this action tries to make vale of "npta" greater as possible; number of * acknowledgements decreases by increasing of "npta". Returns 0 for * success, 1 otherwise. */ static int llc_conn_ac_inc_npta_value(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (!llc->inc_cntr) { llc->dec_step = 0; llc->dec_cntr = llc->inc_cntr = 2; ++llc->npta; if (llc->npta > (u8) ~LLC_2_SEQ_NBR_MODULO) llc->npta = (u8) ~LLC_2_SEQ_NBR_MODULO; } else --llc->inc_cntr; return 0; } /** * llc_conn_ac_adjust_npta_by_rr - decreases "npta" by one * @sk: current connection structure. * @skb: current event. * * After receiving "dec_cntr" times RR command, this action decreases * "npta" by one. Returns 0 for success, 1 otherwise. */ int llc_conn_ac_adjust_npta_by_rr(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (!llc->connect_step && !llc->remote_busy_flag) { if (!llc->dec_step) { if (!llc->dec_cntr) { llc->inc_cntr = llc->dec_cntr = 2; if (llc->npta > 0) llc->npta = llc->npta - 1; } else llc->dec_cntr -=1; } } else llc->connect_step = 0 ; return 0; } /** * llc_conn_ac_adjust_npta_by_rnr - decreases "npta" by one * @sk: current connection structure. * @skb: current event. * * After receiving "dec_cntr" times RNR command, this action decreases * "npta" by one. Returns 0 for success, 1 otherwise. */ int llc_conn_ac_adjust_npta_by_rnr(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (llc->remote_busy_flag) if (!llc->dec_step) { if (!llc->dec_cntr) { llc->inc_cntr = llc->dec_cntr = 2; if (llc->npta > 0) --llc->npta; } else --llc->dec_cntr; } return 0; } /** * llc_conn_ac_dec_tx_win_size - decreases tx window size * @sk: current connection structure. * @skb: current event. * * After receiving of a REJ command or response, transmit window size is * decreased by number of PDUs which are outstanding yet. Returns 0 for * success, 1 otherwise. */ int llc_conn_ac_dec_tx_win_size(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); u8 unacked_pdu = skb_queue_len(&llc->pdu_unack_q); if (llc->k - unacked_pdu < 1) llc->k = 1; else llc->k -= unacked_pdu; return 0; } /** * llc_conn_ac_inc_tx_win_size - tx window size is inc by 1 * @sk: current connection structure. * @skb: current event. * * After receiving an RR response with f-bit set to one, transmit window * size is increased by one. Returns 0 for success, 1 otherwise. */ int llc_conn_ac_inc_tx_win_size(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); llc->k += 1; if (llc->k > (u8) ~LLC_2_SEQ_NBR_MODULO) llc->k = (u8) ~LLC_2_SEQ_NBR_MODULO; return 0; } int llc_conn_ac_stop_all_timers(struct sock *sk, struct sk_buff *skb) { llc_sk_stop_all_timers(sk, false); return 0; } int llc_conn_ac_stop_other_timers(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); timer_delete(&llc->rej_sent_timer.timer); timer_delete(&llc->pf_cycle_timer.timer); timer_delete(&llc->busy_state_timer.timer); llc->ack_must_be_send = 0; llc->ack_pf = 0; return 0; } int llc_conn_ac_start_ack_timer(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); mod_timer(&llc->ack_timer.timer, jiffies + llc->ack_timer.expire); return 0; } int llc_conn_ac_start_rej_timer(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); mod_timer(&llc->rej_sent_timer.timer, jiffies + llc->rej_sent_timer.expire); return 0; } int llc_conn_ac_start_ack_tmr_if_not_running(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); if (!timer_pending(&llc->ack_timer.timer)) mod_timer(&llc->ack_timer.timer, jiffies + llc->ack_timer.expire); return 0; } int llc_conn_ac_stop_ack_timer(struct sock *sk, struct sk_buff *skb) { timer_delete(&llc_sk(sk)->ack_timer.timer); return 0; } int llc_conn_ac_stop_p_timer(struct sock *sk, struct sk_buff *skb) { struct llc_sock *llc = llc_sk(sk); timer_delete(&llc->pf_cycle_timer.timer); llc_conn_set_p_flag(sk, 0); return 0; } int llc_conn_ac_stop_rej_timer(struct sock *sk, struct sk_buff *skb) { timer_delete(&llc_sk(sk)->rej_sent_timer.timer); return 0; } int llc_conn_ac_upd_nr_received(struct sock *sk, struct sk_buff *skb) { int acked; u16 unacked = 0; struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); struct llc_sock *llc = llc_sk(sk); llc->last_nr = PDU_SUPV_GET_Nr(pdu); acked = llc_conn_remove_acked_pdus(sk, llc->last_nr, &unacked); /* On loopback we don't queue I frames in unack_pdu_q queue. */ if (acked > 0 || (llc->dev->flags & IFF_LOOPBACK)) { llc->retry_count = 0; timer_delete(&llc->ack_timer.timer); if (llc->failed_data_req) { /* already, we did not accept data from upper layer * (tx_window full or unacceptable state). Now, we * can send data and must inform to upper layer. */ llc->failed_data_req = 0; llc_conn_ac_data_confirm(sk, skb); } if (unacked) mod_timer(&llc->ack_timer.timer, jiffies + llc->ack_timer.expire); } else if (llc->failed_data_req) { u8 f_bit; llc_pdu_decode_pf_bit(skb, &f_bit); if (f_bit == 1) { llc->failed_data_req = 0; llc_conn_ac_data_confirm(sk, skb); } } return 0; } int llc_conn_ac_upd_p_flag(struct sock *sk, struct sk_buff *skb) { struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); if (LLC_PDU_IS_RSP(pdu)) { u8 f_bit; llc_pdu_decode_pf_bit(skb, &f_bit); if (f_bit) { llc_conn_set_p_flag(sk, 0); llc_conn_ac_stop_p_timer(sk, skb); } } return 0; } int llc_conn_ac_set_data_flag_2(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->data_flag = 2; return 0; } int llc_conn_ac_set_data_flag_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->data_flag = 0; return 0; } int llc_conn_ac_set_data_flag_1(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->data_flag = 1; return 0; } int llc_conn_ac_set_data_flag_1_if_data_flag_eq_0(struct sock *sk, struct sk_buff *skb) { if (!llc_sk(sk)->data_flag) llc_sk(sk)->data_flag = 1; return 0; } int llc_conn_ac_set_p_flag_0(struct sock *sk, struct sk_buff *skb) { llc_conn_set_p_flag(sk, 0); return 0; } static int llc_conn_ac_set_p_flag_1(struct sock *sk, struct sk_buff *skb) { llc_conn_set_p_flag(sk, 1); return 0; } int llc_conn_ac_set_remote_busy_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->remote_busy_flag = 0; return 0; } int llc_conn_ac_set_cause_flag_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->cause_flag = 0; return 0; } int llc_conn_ac_set_cause_flag_1(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->cause_flag = 1; return 0; } int llc_conn_ac_set_retry_cnt_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->retry_count = 0; return 0; } int llc_conn_ac_inc_retry_cnt_by_1(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->retry_count++; return 0; } int llc_conn_ac_set_vr_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->vR = 0; return 0; } int llc_conn_ac_inc_vr_by_1(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->vR = PDU_GET_NEXT_Vr(llc_sk(sk)->vR); return 0; } int llc_conn_ac_set_vs_0(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->vS = 0; return 0; } int llc_conn_ac_set_vs_nr(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->vS = llc_sk(sk)->last_nr; return 0; } static int llc_conn_ac_inc_vs_by_1(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->vS = (llc_sk(sk)->vS + 1) % LLC_2_SEQ_NBR_MODULO; return 0; } static void llc_conn_tmr_common_cb(struct sock *sk, u8 type) { struct sk_buff *skb = alloc_skb(0, GFP_ATOMIC); bh_lock_sock(sk); if (skb) { struct llc_conn_state_ev *ev = llc_conn_ev(skb); skb_set_owner_r(skb, sk); ev->type = type; llc_process_tmr_ev(sk, skb); } bh_unlock_sock(sk); } void llc_conn_pf_cycle_tmr_cb(struct timer_list *t) { struct llc_sock *llc = timer_container_of(llc, t, pf_cycle_timer.timer); llc_conn_tmr_common_cb(&llc->sk, LLC_CONN_EV_TYPE_P_TMR); } void llc_conn_busy_tmr_cb(struct timer_list *t) { struct llc_sock *llc = timer_container_of(llc, t, busy_state_timer.timer); llc_conn_tmr_common_cb(&llc->sk, LLC_CONN_EV_TYPE_BUSY_TMR); } void llc_conn_ack_tmr_cb(struct timer_list *t) { struct llc_sock *llc = timer_container_of(llc, t, ack_timer.timer); llc_conn_tmr_common_cb(&llc->sk, LLC_CONN_EV_TYPE_ACK_TMR); } void llc_conn_rej_tmr_cb(struct timer_list *t) { struct llc_sock *llc = timer_container_of(llc, t, rej_sent_timer.timer); llc_conn_tmr_common_cb(&llc->sk, LLC_CONN_EV_TYPE_REJ_TMR); } int llc_conn_ac_rst_vs(struct sock *sk, struct sk_buff *skb) { llc_sk(sk)->X = llc_sk(sk)->vS; llc_conn_ac_set_vs_nr(sk, skb); return 0; } int llc_conn_ac_upd_vs(struct sock *sk, struct sk_buff *skb) { struct llc_pdu_sn *pdu = llc_pdu_sn_hdr(skb); u8 nr = PDU_SUPV_GET_Nr(pdu); if (llc_circular_between(llc_sk(sk)->vS, nr, llc_sk(sk)->X)) llc_conn_ac_set_vs_nr(sk, skb); return 0; } /* * Non-standard actions; these not contained in IEEE specification; for * our own usage */ /** * llc_conn_disc - removes connection from SAP list and frees it * @sk: closed connection * @skb: occurred event */ int llc_conn_disc(struct sock *sk, struct sk_buff *skb) { /* FIXME: this thing seems to want to die */ return 0; } /** * llc_conn_reset - resets connection * @sk : reseting connection. * @skb: occurred event. * * Stop all timers, empty all queues and reset all flags. */ int llc_conn_reset(struct sock *sk, struct sk_buff *skb) { llc_sk_reset(sk); return 0; } /** * llc_circular_between - designates that b is between a and c or not * @a: lower bound * @b: element to see if is between a and b * @c: upper bound * * This function designates that b is between a and c or not (for example, * 0 is between 127 and 1). Returns 1 if b is between a and c, 0 * otherwise. */ u8 llc_circular_between(u8 a, u8 b, u8 c) { b = b - a; c = c - a; return b <= c; } /** * llc_process_tmr_ev - timer backend * @sk: active connection * @skb: occurred event * * This function is called from timer callback functions. When connection * is busy (during sending a data frame) timer expiration event must be * queued. Otherwise this event can be sent to connection state machine. * Queued events will process by llc_backlog_rcv function after sending * data frame. */ static void llc_process_tmr_ev(struct sock *sk, struct sk_buff *skb) { if (llc_sk(sk)->state == LLC_CONN_OUT_OF_SVC) { printk(KERN_WARNING "%s: timer called on closed connection\n", __func__); kfree_skb(skb); } else { if (!sock_owned_by_user(sk)) llc_conn_state_process(sk, skb); else { llc_set_backlog_type(skb, LLC_EVENT); __sk_add_backlog(sk, skb); } } } |
| 29 2 1 3 19 1 2 1 18 1 2 16 2 18 2 7 6 7 7 18 19 7 1 1 1 1 1 1 7 1 1 7 58 58 | 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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * net/sched/act_gact.c Generic actions * * copyright Jamal Hadi Salim (2002-4) */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/errno.h> #include <linux/skbuff.h> #include <linux/rtnetlink.h> #include <linux/module.h> #include <linux/init.h> #include <net/netlink.h> #include <net/pkt_sched.h> #include <net/pkt_cls.h> #include <linux/tc_act/tc_gact.h> #include <net/tc_act/tc_gact.h> #include <net/tc_wrapper.h> static struct tc_action_ops act_gact_ops; #ifdef CONFIG_GACT_PROB static int gact_net_rand(struct tcf_gact *gact) { smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */ if (get_random_u32_below(gact->tcfg_pval)) return gact->tcf_action; return gact->tcfg_paction; } static int gact_determ(struct tcf_gact *gact) { u32 pack = atomic_inc_return(&gact->packets); smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */ if (pack % gact->tcfg_pval) return gact->tcf_action; return gact->tcfg_paction; } typedef int (*g_rand)(struct tcf_gact *gact); static g_rand gact_rand[MAX_RAND] = { NULL, gact_net_rand, gact_determ }; #endif /* CONFIG_GACT_PROB */ static const struct nla_policy gact_policy[TCA_GACT_MAX + 1] = { [TCA_GACT_PARMS] = { .len = sizeof(struct tc_gact) }, [TCA_GACT_PROB] = { .len = sizeof(struct tc_gact_p) }, }; static int tcf_gact_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_gact_ops.net_id); bool bind = flags & TCA_ACT_FLAGS_BIND; struct nlattr *tb[TCA_GACT_MAX + 1]; struct tcf_chain *goto_ch = NULL; struct tc_gact *parm; struct tcf_gact *gact; int ret = 0; u32 index; int err; #ifdef CONFIG_GACT_PROB struct tc_gact_p *p_parm = NULL; #endif if (nla == NULL) return -EINVAL; err = nla_parse_nested_deprecated(tb, TCA_GACT_MAX, nla, gact_policy, NULL); if (err < 0) return err; if (tb[TCA_GACT_PARMS] == NULL) return -EINVAL; parm = nla_data(tb[TCA_GACT_PARMS]); index = parm->index; #ifndef CONFIG_GACT_PROB if (tb[TCA_GACT_PROB] != NULL) return -EOPNOTSUPP; #else if (tb[TCA_GACT_PROB]) { p_parm = nla_data(tb[TCA_GACT_PROB]); if (p_parm->ptype >= MAX_RAND) return -EINVAL; if (TC_ACT_EXT_CMP(p_parm->paction, TC_ACT_GOTO_CHAIN)) { NL_SET_ERR_MSG(extack, "goto chain not allowed on fallback"); return -EINVAL; } } #endif err = tcf_idr_check_alloc(tn, &index, a, bind); if (!err) { ret = tcf_idr_create_from_flags(tn, index, est, a, &act_gact_ops, bind, flags); if (ret) { tcf_idr_cleanup(tn, index); return ret; } ret = ACT_P_CREATED; } else if (err > 0) { if (bind)/* dont override defaults */ return ACT_P_BOUND; if (!(flags & TCA_ACT_FLAGS_REPLACE)) { tcf_idr_release(*a, bind); return -EEXIST; } } else { return err; } err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); if (err < 0) goto release_idr; gact = to_gact(*a); spin_lock_bh(&gact->tcf_lock); goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); #ifdef CONFIG_GACT_PROB if (p_parm) { gact->tcfg_paction = p_parm->paction; gact->tcfg_pval = max_t(u16, 1, p_parm->pval); /* Make sure tcfg_pval is written before tcfg_ptype * coupled with smp_rmb() in gact_net_rand() & gact_determ() */ smp_wmb(); gact->tcfg_ptype = p_parm->ptype; } #endif spin_unlock_bh(&gact->tcf_lock); if (goto_ch) tcf_chain_put_by_act(goto_ch); return ret; release_idr: tcf_idr_release(*a, bind); return err; } TC_INDIRECT_SCOPE int tcf_gact_act(struct sk_buff *skb, const struct tc_action *a, struct tcf_result *res) { struct tcf_gact *gact = to_gact(a); int action = READ_ONCE(gact->tcf_action); #ifdef CONFIG_GACT_PROB { u32 ptype = READ_ONCE(gact->tcfg_ptype); if (ptype) action = gact_rand[ptype](gact); } #endif tcf_action_update_bstats(&gact->common, skb); if (action == TC_ACT_SHOT) tcf_action_inc_drop_qstats(&gact->common); tcf_lastuse_update(&gact->tcf_tm); return action; } static void tcf_gact_stats_update(struct tc_action *a, u64 bytes, u64 packets, u64 drops, u64 lastuse, bool hw) { struct tcf_gact *gact = to_gact(a); int action = READ_ONCE(gact->tcf_action); struct tcf_t *tm = &gact->tcf_tm; tcf_action_update_stats(a, bytes, packets, action == TC_ACT_SHOT ? packets : drops, hw); tm->lastuse = max_t(u64, tm->lastuse, lastuse); } static int tcf_gact_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref) { unsigned char *b = skb_tail_pointer(skb); struct tcf_gact *gact = to_gact(a); struct tc_gact opt = { .index = gact->tcf_index, .refcnt = refcount_read(&gact->tcf_refcnt) - ref, .bindcnt = atomic_read(&gact->tcf_bindcnt) - bind, }; struct tcf_t t; spin_lock_bh(&gact->tcf_lock); opt.action = gact->tcf_action; if (nla_put(skb, TCA_GACT_PARMS, sizeof(opt), &opt)) goto nla_put_failure; #ifdef CONFIG_GACT_PROB if (gact->tcfg_ptype) { struct tc_gact_p p_opt = { .paction = gact->tcfg_paction, .pval = gact->tcfg_pval, .ptype = gact->tcfg_ptype, }; if (nla_put(skb, TCA_GACT_PROB, sizeof(p_opt), &p_opt)) goto nla_put_failure; } #endif tcf_tm_dump(&t, &gact->tcf_tm); if (nla_put_64bit(skb, TCA_GACT_TM, sizeof(t), &t, TCA_GACT_PAD)) goto nla_put_failure; spin_unlock_bh(&gact->tcf_lock); return skb->len; nla_put_failure: spin_unlock_bh(&gact->tcf_lock); nlmsg_trim(skb, b); return -1; } static size_t tcf_gact_get_fill_size(const struct tc_action *act) { size_t sz = nla_total_size(sizeof(struct tc_gact)); /* TCA_GACT_PARMS */ #ifdef CONFIG_GACT_PROB if (to_gact(act)->tcfg_ptype) /* TCA_GACT_PROB */ sz += nla_total_size(sizeof(struct tc_gact_p)); #endif return sz; } static int tcf_gact_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 (is_tcf_gact_ok(act)) { entry->id = FLOW_ACTION_ACCEPT; } else if (is_tcf_gact_shot(act)) { entry->id = FLOW_ACTION_DROP; } else if (is_tcf_gact_trap(act)) { entry->id = FLOW_ACTION_TRAP; } else if (is_tcf_gact_goto_chain(act)) { entry->id = FLOW_ACTION_GOTO; entry->chain_index = tcf_gact_goto_chain_index(act); } else if (is_tcf_gact_continue(act)) { NL_SET_ERR_MSG_MOD(extack, "Offload of \"continue\" action is not supported"); return -EOPNOTSUPP; } else if (is_tcf_gact_reclassify(act)) { NL_SET_ERR_MSG_MOD(extack, "Offload of \"reclassify\" action is not supported"); return -EOPNOTSUPP; } else if (is_tcf_gact_pipe(act)) { NL_SET_ERR_MSG_MOD(extack, "Offload of \"pipe\" action is not supported"); return -EOPNOTSUPP; } else { NL_SET_ERR_MSG_MOD(extack, "Unsupported generic action offload"); return -EOPNOTSUPP; } *index_inc = 1; } else { struct flow_offload_action *fl_action = entry_data; if (is_tcf_gact_ok(act)) fl_action->id = FLOW_ACTION_ACCEPT; else if (is_tcf_gact_shot(act)) fl_action->id = FLOW_ACTION_DROP; else if (is_tcf_gact_trap(act)) fl_action->id = FLOW_ACTION_TRAP; else if (is_tcf_gact_goto_chain(act)) fl_action->id = FLOW_ACTION_GOTO; else return -EOPNOTSUPP; } return 0; } static struct tc_action_ops act_gact_ops = { .kind = "gact", .id = TCA_ID_GACT, .owner = THIS_MODULE, .act = tcf_gact_act, .stats_update = tcf_gact_stats_update, .dump = tcf_gact_dump, .init = tcf_gact_init, .get_fill_size = tcf_gact_get_fill_size, .offload_act_setup = tcf_gact_offload_act_setup, .size = sizeof(struct tcf_gact), }; MODULE_ALIAS_NET_ACT("gact"); static __net_init int gact_init_net(struct net *net) { struct tc_action_net *tn = net_generic(net, act_gact_ops.net_id); return tc_action_net_init(net, tn, &act_gact_ops); } static void __net_exit gact_exit_net(struct list_head *net_list) { tc_action_net_exit(net_list, act_gact_ops.net_id); } static struct pernet_operations gact_net_ops = { .init = gact_init_net, .exit_batch = gact_exit_net, .id = &act_gact_ops.net_id, .size = sizeof(struct tc_action_net), }; MODULE_AUTHOR("Jamal Hadi Salim(2002-4)"); MODULE_DESCRIPTION("Generic Classifier actions"); MODULE_LICENSE("GPL"); static int __init gact_init_module(void) { #ifdef CONFIG_GACT_PROB pr_info("GACT probability on\n"); #else pr_info("GACT probability NOT on\n"); #endif return tcf_register_action(&act_gact_ops, &gact_net_ops); } static void __exit gact_cleanup_module(void) { tcf_unregister_action(&act_gact_ops, &gact_net_ops); } module_init(gact_init_module); module_exit(gact_cleanup_module); |
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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 | // SPDX-License-Identifier: GPL-2.0-or-later #include <linux/bits.h> #include <linux/bitfield.h> #include <linux/idr.h> #include <linux/kernel.h> #include <linux/netdevice.h> #include <linux/netlink.h> #include <linux/skbuff.h> #include <linux/xarray.h> #include <net/devlink.h> #include <net/net_shaper.h> #include "shaper_nl_gen.h" #include "../core/dev.h" #define NET_SHAPER_SCOPE_SHIFT 26 #define NET_SHAPER_ID_MASK GENMASK(NET_SHAPER_SCOPE_SHIFT - 1, 0) #define NET_SHAPER_SCOPE_MASK GENMASK(31, NET_SHAPER_SCOPE_SHIFT) #define NET_SHAPER_ID_UNSPEC NET_SHAPER_ID_MASK struct net_shaper_hierarchy { struct xarray shapers; }; struct net_shaper_nl_ctx { struct net_shaper_binding binding; netdevice_tracker dev_tracker; unsigned long start_index; }; static struct net_shaper_binding *net_shaper_binding_from_ctx(void *ctx) { return &((struct net_shaper_nl_ctx *)ctx)->binding; } static void net_shaper_lock(struct net_shaper_binding *binding) { switch (binding->type) { case NET_SHAPER_BINDING_TYPE_NETDEV: netdev_lock(binding->netdev); break; } } static void net_shaper_unlock(struct net_shaper_binding *binding) { switch (binding->type) { case NET_SHAPER_BINDING_TYPE_NETDEV: netdev_unlock(binding->netdev); break; } } static struct net_shaper_hierarchy * net_shaper_hierarchy(struct net_shaper_binding *binding) { /* Pairs with WRITE_ONCE() in net_shaper_hierarchy_setup. */ if (binding->type == NET_SHAPER_BINDING_TYPE_NETDEV) return READ_ONCE(binding->netdev->net_shaper_hierarchy); /* No other type supported yet. */ return NULL; } static const struct net_shaper_ops * net_shaper_ops(struct net_shaper_binding *binding) { if (binding->type == NET_SHAPER_BINDING_TYPE_NETDEV) return binding->netdev->netdev_ops->net_shaper_ops; /* No other type supported yet. */ return NULL; } /* Count the number of [multi] attributes of the given type. */ static int net_shaper_list_len(struct genl_info *info, int type) { struct nlattr *attr; int rem, cnt = 0; nla_for_each_attr_type(attr, type, genlmsg_data(info->genlhdr), genlmsg_len(info->genlhdr), rem) cnt++; return cnt; } static int net_shaper_handle_size(void) { return nla_total_size(nla_total_size(sizeof(u32)) + nla_total_size(sizeof(u32))); } static int net_shaper_fill_binding(struct sk_buff *msg, const struct net_shaper_binding *binding, u32 type) { /* Should never happen, as currently only NETDEV is supported. */ if (WARN_ON_ONCE(binding->type != NET_SHAPER_BINDING_TYPE_NETDEV)) return -EINVAL; if (nla_put_u32(msg, type, binding->netdev->ifindex)) return -EMSGSIZE; return 0; } static int net_shaper_fill_handle(struct sk_buff *msg, const struct net_shaper_handle *handle, u32 type) { struct nlattr *handle_attr; if (handle->scope == NET_SHAPER_SCOPE_UNSPEC) return 0; handle_attr = nla_nest_start(msg, type); if (!handle_attr) return -EMSGSIZE; if (nla_put_u32(msg, NET_SHAPER_A_HANDLE_SCOPE, handle->scope) || (handle->scope >= NET_SHAPER_SCOPE_QUEUE && nla_put_u32(msg, NET_SHAPER_A_HANDLE_ID, handle->id))) goto handle_nest_cancel; nla_nest_end(msg, handle_attr); return 0; handle_nest_cancel: nla_nest_cancel(msg, handle_attr); return -EMSGSIZE; } static int net_shaper_fill_one(struct sk_buff *msg, const struct net_shaper_binding *binding, const struct net_shaper *shaper, const struct genl_info *info) { void *hdr; hdr = genlmsg_iput(msg, info); if (!hdr) return -EMSGSIZE; if (net_shaper_fill_binding(msg, binding, NET_SHAPER_A_IFINDEX) || net_shaper_fill_handle(msg, &shaper->parent, NET_SHAPER_A_PARENT) || net_shaper_fill_handle(msg, &shaper->handle, NET_SHAPER_A_HANDLE) || ((shaper->bw_min || shaper->bw_max || shaper->burst) && nla_put_u32(msg, NET_SHAPER_A_METRIC, shaper->metric)) || (shaper->bw_min && nla_put_uint(msg, NET_SHAPER_A_BW_MIN, shaper->bw_min)) || (shaper->bw_max && nla_put_uint(msg, NET_SHAPER_A_BW_MAX, shaper->bw_max)) || (shaper->burst && nla_put_uint(msg, NET_SHAPER_A_BURST, shaper->burst)) || (shaper->priority && nla_put_u32(msg, NET_SHAPER_A_PRIORITY, shaper->priority)) || (shaper->weight && nla_put_u32(msg, NET_SHAPER_A_WEIGHT, shaper->weight))) goto nla_put_failure; genlmsg_end(msg, hdr); return 0; nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } /* Initialize the context fetching the relevant device and * acquiring a reference to it. */ static int net_shaper_ctx_setup(const struct genl_info *info, int type, struct net_shaper_nl_ctx *ctx) { struct net *ns = genl_info_net(info); struct net_device *dev; int ifindex; if (GENL_REQ_ATTR_CHECK(info, type)) return -EINVAL; ifindex = nla_get_u32(info->attrs[type]); dev = netdev_get_by_index(ns, ifindex, &ctx->dev_tracker, GFP_KERNEL); if (!dev) { NL_SET_BAD_ATTR(info->extack, info->attrs[type]); return -ENOENT; } if (!dev->netdev_ops->net_shaper_ops) { NL_SET_BAD_ATTR(info->extack, info->attrs[type]); netdev_put(dev, &ctx->dev_tracker); return -EOPNOTSUPP; } ctx->binding.type = NET_SHAPER_BINDING_TYPE_NETDEV; ctx->binding.netdev = dev; return 0; } static void net_shaper_ctx_cleanup(struct net_shaper_nl_ctx *ctx) { if (ctx->binding.type == NET_SHAPER_BINDING_TYPE_NETDEV) netdev_put(ctx->binding.netdev, &ctx->dev_tracker); } static u32 net_shaper_handle_to_index(const struct net_shaper_handle *handle) { return FIELD_PREP(NET_SHAPER_SCOPE_MASK, handle->scope) | FIELD_PREP(NET_SHAPER_ID_MASK, handle->id); } static void net_shaper_index_to_handle(u32 index, struct net_shaper_handle *handle) { handle->scope = FIELD_GET(NET_SHAPER_SCOPE_MASK, index); handle->id = FIELD_GET(NET_SHAPER_ID_MASK, index); } static void net_shaper_default_parent(const struct net_shaper_handle *handle, struct net_shaper_handle *parent) { switch (handle->scope) { case NET_SHAPER_SCOPE_UNSPEC: case NET_SHAPER_SCOPE_NETDEV: case __NET_SHAPER_SCOPE_MAX: parent->scope = NET_SHAPER_SCOPE_UNSPEC; break; case NET_SHAPER_SCOPE_QUEUE: case NET_SHAPER_SCOPE_NODE: parent->scope = NET_SHAPER_SCOPE_NETDEV; break; } parent->id = 0; } /* * MARK_0 is already in use due to XA_FLAGS_ALLOC, can't reuse such flag as * it's cleared by xa_store(). */ #define NET_SHAPER_NOT_VALID XA_MARK_1 static struct net_shaper * net_shaper_lookup(struct net_shaper_binding *binding, const struct net_shaper_handle *handle) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); u32 index = net_shaper_handle_to_index(handle); if (!hierarchy || xa_get_mark(&hierarchy->shapers, index, NET_SHAPER_NOT_VALID)) return NULL; return xa_load(&hierarchy->shapers, index); } /* Allocate on demand the per device shaper's hierarchy container. * Called under the net shaper lock */ static struct net_shaper_hierarchy * net_shaper_hierarchy_setup(struct net_shaper_binding *binding) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); if (hierarchy) return hierarchy; hierarchy = kmalloc(sizeof(*hierarchy), GFP_KERNEL); if (!hierarchy) return NULL; /* The flag is required for ID allocation */ xa_init_flags(&hierarchy->shapers, XA_FLAGS_ALLOC); switch (binding->type) { case NET_SHAPER_BINDING_TYPE_NETDEV: /* Pairs with READ_ONCE in net_shaper_hierarchy. */ WRITE_ONCE(binding->netdev->net_shaper_hierarchy, hierarchy); break; } return hierarchy; } /* Prepare the hierarchy container to actually insert the given shaper, doing * in advance the needed allocations. */ static int net_shaper_pre_insert(struct net_shaper_binding *binding, struct net_shaper_handle *handle, struct netlink_ext_ack *extack) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); struct net_shaper *prev, *cur; bool id_allocated = false; int ret, index; if (!hierarchy) return -ENOMEM; index = net_shaper_handle_to_index(handle); cur = xa_load(&hierarchy->shapers, index); if (cur) return 0; /* Allocated a new id, if needed. */ if (handle->scope == NET_SHAPER_SCOPE_NODE && handle->id == NET_SHAPER_ID_UNSPEC) { u32 min, max; handle->id = NET_SHAPER_ID_MASK - 1; max = net_shaper_handle_to_index(handle); handle->id = 0; min = net_shaper_handle_to_index(handle); ret = xa_alloc(&hierarchy->shapers, &index, NULL, XA_LIMIT(min, max), GFP_KERNEL); if (ret < 0) { NL_SET_ERR_MSG(extack, "Can't allocate new id for NODE shaper"); return ret; } net_shaper_index_to_handle(index, handle); id_allocated = true; } cur = kzalloc(sizeof(*cur), GFP_KERNEL); if (!cur) { ret = -ENOMEM; goto free_id; } /* Mark 'tentative' shaper inside the hierarchy container. * xa_set_mark is a no-op if the previous store fails. */ xa_lock(&hierarchy->shapers); prev = __xa_store(&hierarchy->shapers, index, cur, GFP_KERNEL); __xa_set_mark(&hierarchy->shapers, index, NET_SHAPER_NOT_VALID); xa_unlock(&hierarchy->shapers); if (xa_err(prev)) { NL_SET_ERR_MSG(extack, "Can't insert shaper into device store"); kfree_rcu(cur, rcu); ret = xa_err(prev); goto free_id; } return 0; free_id: if (id_allocated) xa_erase(&hierarchy->shapers, index); return ret; } /* Commit the tentative insert with the actual values. * Must be called only after a successful net_shaper_pre_insert(). */ static void net_shaper_commit(struct net_shaper_binding *binding, int nr_shapers, const struct net_shaper *shapers) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); struct net_shaper *cur; int index; int i; xa_lock(&hierarchy->shapers); for (i = 0; i < nr_shapers; ++i) { index = net_shaper_handle_to_index(&shapers[i].handle); cur = xa_load(&hierarchy->shapers, index); if (WARN_ON_ONCE(!cur)) continue; /* Successful update: drop the tentative mark * and update the hierarchy container. */ __xa_clear_mark(&hierarchy->shapers, index, NET_SHAPER_NOT_VALID); *cur = shapers[i]; } xa_unlock(&hierarchy->shapers); } /* Rollback all the tentative inserts from the hierarchy. */ static void net_shaper_rollback(struct net_shaper_binding *binding) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); struct net_shaper *cur; unsigned long index; if (!hierarchy) return; xa_lock(&hierarchy->shapers); xa_for_each_marked(&hierarchy->shapers, index, cur, NET_SHAPER_NOT_VALID) { __xa_erase(&hierarchy->shapers, index); kfree(cur); } xa_unlock(&hierarchy->shapers); } static int net_shaper_parse_handle(const struct nlattr *attr, const struct genl_info *info, struct net_shaper_handle *handle) { struct nlattr *tb[NET_SHAPER_A_HANDLE_MAX + 1]; struct nlattr *id_attr; u32 id = 0; int ret; ret = nla_parse_nested(tb, NET_SHAPER_A_HANDLE_MAX, attr, net_shaper_handle_nl_policy, info->extack); if (ret < 0) return ret; if (NL_REQ_ATTR_CHECK(info->extack, attr, tb, NET_SHAPER_A_HANDLE_SCOPE)) return -EINVAL; handle->scope = nla_get_u32(tb[NET_SHAPER_A_HANDLE_SCOPE]); /* The default id for NODE scope shapers is an invalid one * to help the 'group' operation discriminate between new * NODE shaper creation (ID_UNSPEC) and reuse of existing * shaper (any other value). */ id_attr = tb[NET_SHAPER_A_HANDLE_ID]; if (id_attr) id = nla_get_u32(id_attr); else if (handle->scope == NET_SHAPER_SCOPE_NODE) id = NET_SHAPER_ID_UNSPEC; handle->id = id; return 0; } static int net_shaper_validate_caps(struct net_shaper_binding *binding, struct nlattr **tb, const struct genl_info *info, struct net_shaper *shaper) { const struct net_shaper_ops *ops = net_shaper_ops(binding); struct nlattr *bad = NULL; unsigned long caps = 0; ops->capabilities(binding, shaper->handle.scope, &caps); if (tb[NET_SHAPER_A_PRIORITY] && !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_PRIORITY))) bad = tb[NET_SHAPER_A_PRIORITY]; if (tb[NET_SHAPER_A_WEIGHT] && !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_WEIGHT))) bad = tb[NET_SHAPER_A_WEIGHT]; if (tb[NET_SHAPER_A_BW_MIN] && !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MIN))) bad = tb[NET_SHAPER_A_BW_MIN]; if (tb[NET_SHAPER_A_BW_MAX] && !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_BW_MAX))) bad = tb[NET_SHAPER_A_BW_MAX]; if (tb[NET_SHAPER_A_BURST] && !(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_BURST))) bad = tb[NET_SHAPER_A_BURST]; if (!caps) bad = tb[NET_SHAPER_A_HANDLE]; if (bad) { NL_SET_BAD_ATTR(info->extack, bad); return -EOPNOTSUPP; } if (shaper->handle.scope == NET_SHAPER_SCOPE_QUEUE && binding->type == NET_SHAPER_BINDING_TYPE_NETDEV && shaper->handle.id >= binding->netdev->real_num_tx_queues) { NL_SET_ERR_MSG_FMT(info->extack, "Not existing queue id %d max %d", shaper->handle.id, binding->netdev->real_num_tx_queues); return -ENOENT; } /* The metric is really used only if there is *any* rate-related * setting, either in current attributes set or in pre-existing * values. */ if (shaper->burst || shaper->bw_min || shaper->bw_max) { u32 metric_cap = NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS + shaper->metric; /* The metric test can fail even when the user did not * specify the METRIC attribute. Pointing to rate related * attribute will be confusing, as the attribute itself * could be indeed supported, with a different metric. * Be more specific. */ if (!(caps & BIT(metric_cap))) { NL_SET_ERR_MSG_FMT(info->extack, "Bad metric %d", shaper->metric); return -EOPNOTSUPP; } } return 0; } static int net_shaper_parse_info(struct net_shaper_binding *binding, struct nlattr **tb, const struct genl_info *info, struct net_shaper *shaper, bool *exists) { struct net_shaper *old; int ret; /* The shaper handle is the only mandatory attribute. */ if (NL_REQ_ATTR_CHECK(info->extack, NULL, tb, NET_SHAPER_A_HANDLE)) return -EINVAL; ret = net_shaper_parse_handle(tb[NET_SHAPER_A_HANDLE], info, &shaper->handle); if (ret) return ret; if (shaper->handle.scope == NET_SHAPER_SCOPE_UNSPEC) { NL_SET_BAD_ATTR(info->extack, tb[NET_SHAPER_A_HANDLE]); return -EINVAL; } /* Fetch existing hierarchy, if any, so that user provide info will * incrementally update the existing shaper configuration. */ old = net_shaper_lookup(binding, &shaper->handle); if (old) *shaper = *old; *exists = !!old; if (tb[NET_SHAPER_A_METRIC]) shaper->metric = nla_get_u32(tb[NET_SHAPER_A_METRIC]); if (tb[NET_SHAPER_A_BW_MIN]) shaper->bw_min = nla_get_uint(tb[NET_SHAPER_A_BW_MIN]); if (tb[NET_SHAPER_A_BW_MAX]) shaper->bw_max = nla_get_uint(tb[NET_SHAPER_A_BW_MAX]); if (tb[NET_SHAPER_A_BURST]) shaper->burst = nla_get_uint(tb[NET_SHAPER_A_BURST]); if (tb[NET_SHAPER_A_PRIORITY]) shaper->priority = nla_get_u32(tb[NET_SHAPER_A_PRIORITY]); if (tb[NET_SHAPER_A_WEIGHT]) shaper->weight = nla_get_u32(tb[NET_SHAPER_A_WEIGHT]); ret = net_shaper_validate_caps(binding, tb, info, shaper); if (ret < 0) return ret; return 0; } static int net_shaper_validate_nesting(struct net_shaper_binding *binding, const struct net_shaper *shaper, struct netlink_ext_ack *extack) { const struct net_shaper_ops *ops = net_shaper_ops(binding); unsigned long caps = 0; ops->capabilities(binding, shaper->handle.scope, &caps); if (!(caps & BIT(NET_SHAPER_A_CAPS_SUPPORT_NESTING))) { NL_SET_ERR_MSG_FMT(extack, "Nesting not supported for scope %d", shaper->handle.scope); return -EOPNOTSUPP; } return 0; } /* Fetch the existing leaf and update it with the user-provided * attributes. */ static int net_shaper_parse_leaf(struct net_shaper_binding *binding, const struct nlattr *attr, const struct genl_info *info, const struct net_shaper *node, struct net_shaper *shaper) { struct nlattr *tb[NET_SHAPER_A_WEIGHT + 1]; bool exists; int ret; ret = nla_parse_nested(tb, NET_SHAPER_A_WEIGHT, attr, net_shaper_leaf_info_nl_policy, info->extack); if (ret < 0) return ret; ret = net_shaper_parse_info(binding, tb, info, shaper, &exists); if (ret < 0) return ret; if (shaper->handle.scope != NET_SHAPER_SCOPE_QUEUE) { NL_SET_BAD_ATTR(info->extack, tb[NET_SHAPER_A_HANDLE]); return -EINVAL; } if (node->handle.scope == NET_SHAPER_SCOPE_NODE) { ret = net_shaper_validate_nesting(binding, shaper, info->extack); if (ret < 0) return ret; } if (!exists) net_shaper_default_parent(&shaper->handle, &shaper->parent); return 0; } /* Alike net_parse_shaper_info(), but additionally allow the user specifying * the shaper's parent handle. */ static int net_shaper_parse_node(struct net_shaper_binding *binding, struct nlattr **tb, const struct genl_info *info, struct net_shaper *shaper) { bool exists; int ret; ret = net_shaper_parse_info(binding, tb, info, shaper, &exists); if (ret) return ret; if (shaper->handle.scope != NET_SHAPER_SCOPE_NODE && shaper->handle.scope != NET_SHAPER_SCOPE_NETDEV) { NL_SET_BAD_ATTR(info->extack, tb[NET_SHAPER_A_HANDLE]); return -EINVAL; } if (tb[NET_SHAPER_A_PARENT]) { ret = net_shaper_parse_handle(tb[NET_SHAPER_A_PARENT], info, &shaper->parent); if (ret) return ret; if (shaper->parent.scope != NET_SHAPER_SCOPE_NODE && shaper->parent.scope != NET_SHAPER_SCOPE_NETDEV) { NL_SET_BAD_ATTR(info->extack, tb[NET_SHAPER_A_PARENT]); return -EINVAL; } } return 0; } static int net_shaper_generic_pre(struct genl_info *info, int type) { struct net_shaper_nl_ctx *ctx = (struct net_shaper_nl_ctx *)info->ctx; BUILD_BUG_ON(sizeof(*ctx) > sizeof(info->ctx)); return net_shaper_ctx_setup(info, type, ctx); } int net_shaper_nl_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info) { return net_shaper_generic_pre(info, NET_SHAPER_A_IFINDEX); } static void net_shaper_generic_post(struct genl_info *info) { net_shaper_ctx_cleanup((struct net_shaper_nl_ctx *)info->ctx); } void net_shaper_nl_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info) { net_shaper_generic_post(info); } int net_shaper_nl_pre_dumpit(struct netlink_callback *cb) { struct net_shaper_nl_ctx *ctx = (struct net_shaper_nl_ctx *)cb->ctx; const struct genl_info *info = genl_info_dump(cb); return net_shaper_ctx_setup(info, NET_SHAPER_A_IFINDEX, ctx); } int net_shaper_nl_post_dumpit(struct netlink_callback *cb) { net_shaper_ctx_cleanup((struct net_shaper_nl_ctx *)cb->ctx); return 0; } int net_shaper_nl_cap_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info) { return net_shaper_generic_pre(info, NET_SHAPER_A_CAPS_IFINDEX); } void net_shaper_nl_cap_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb, struct genl_info *info) { net_shaper_generic_post(info); } int net_shaper_nl_cap_pre_dumpit(struct netlink_callback *cb) { struct net_shaper_nl_ctx *ctx = (struct net_shaper_nl_ctx *)cb->ctx; return net_shaper_ctx_setup(genl_info_dump(cb), NET_SHAPER_A_CAPS_IFINDEX, ctx); } int net_shaper_nl_cap_post_dumpit(struct netlink_callback *cb) { struct net_shaper_nl_ctx *ctx = (struct net_shaper_nl_ctx *)cb->ctx; net_shaper_ctx_cleanup(ctx); return 0; } int net_shaper_nl_get_doit(struct sk_buff *skb, struct genl_info *info) { struct net_shaper_binding *binding; struct net_shaper_handle handle; struct net_shaper *shaper; struct sk_buff *msg; int ret; if (GENL_REQ_ATTR_CHECK(info, NET_SHAPER_A_HANDLE)) return -EINVAL; binding = net_shaper_binding_from_ctx(info->ctx); ret = net_shaper_parse_handle(info->attrs[NET_SHAPER_A_HANDLE], info, &handle); if (ret < 0) return ret; msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; rcu_read_lock(); shaper = net_shaper_lookup(binding, &handle); if (!shaper) { NL_SET_BAD_ATTR(info->extack, info->attrs[NET_SHAPER_A_HANDLE]); rcu_read_unlock(); ret = -ENOENT; goto free_msg; } ret = net_shaper_fill_one(msg, binding, shaper, info); rcu_read_unlock(); if (ret) goto free_msg; ret = genlmsg_reply(msg, info); if (ret) goto free_msg; return 0; free_msg: nlmsg_free(msg); return ret; } int net_shaper_nl_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) { struct net_shaper_nl_ctx *ctx = (struct net_shaper_nl_ctx *)cb->ctx; const struct genl_info *info = genl_info_dump(cb); struct net_shaper_hierarchy *hierarchy; struct net_shaper_binding *binding; struct net_shaper *shaper; int ret = 0; /* Don't error out dumps performed before any set operation. */ binding = net_shaper_binding_from_ctx(ctx); hierarchy = net_shaper_hierarchy(binding); if (!hierarchy) return 0; rcu_read_lock(); for (; (shaper = xa_find(&hierarchy->shapers, &ctx->start_index, U32_MAX, XA_PRESENT)); ctx->start_index++) { ret = net_shaper_fill_one(skb, binding, shaper, info); if (ret) break; } rcu_read_unlock(); return ret; } int net_shaper_nl_set_doit(struct sk_buff *skb, struct genl_info *info) { struct net_shaper_hierarchy *hierarchy; struct net_shaper_binding *binding; const struct net_shaper_ops *ops; struct net_shaper_handle handle; struct net_shaper shaper = {}; bool exists; int ret; binding = net_shaper_binding_from_ctx(info->ctx); net_shaper_lock(binding); ret = net_shaper_parse_info(binding, info->attrs, info, &shaper, &exists); if (ret) goto unlock; if (!exists) net_shaper_default_parent(&shaper.handle, &shaper.parent); hierarchy = net_shaper_hierarchy_setup(binding); if (!hierarchy) { ret = -ENOMEM; goto unlock; } /* The 'set' operation can't create node-scope shapers. */ handle = shaper.handle; if (handle.scope == NET_SHAPER_SCOPE_NODE && !net_shaper_lookup(binding, &handle)) { ret = -ENOENT; goto unlock; } ret = net_shaper_pre_insert(binding, &handle, info->extack); if (ret) goto unlock; ops = net_shaper_ops(binding); ret = ops->set(binding, &shaper, info->extack); if (ret) { net_shaper_rollback(binding); goto unlock; } net_shaper_commit(binding, 1, &shaper); unlock: net_shaper_unlock(binding); return ret; } static int __net_shaper_delete(struct net_shaper_binding *binding, struct net_shaper *shaper, struct netlink_ext_ack *extack) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); struct net_shaper_handle parent_handle, handle = shaper->handle; const struct net_shaper_ops *ops = net_shaper_ops(binding); int ret; again: parent_handle = shaper->parent; ret = ops->delete(binding, &handle, extack); if (ret < 0) return ret; xa_erase(&hierarchy->shapers, net_shaper_handle_to_index(&handle)); kfree_rcu(shaper, rcu); /* Eventually delete the parent, if it is left over with no leaves. */ if (parent_handle.scope == NET_SHAPER_SCOPE_NODE) { shaper = net_shaper_lookup(binding, &parent_handle); if (shaper && !--shaper->leaves) { handle = parent_handle; goto again; } } return 0; } static int net_shaper_handle_cmp(const struct net_shaper_handle *a, const struct net_shaper_handle *b) { /* Must avoid holes in struct net_shaper_handle. */ BUILD_BUG_ON(sizeof(*a) != 8); return memcmp(a, b, sizeof(*a)); } static int net_shaper_parent_from_leaves(int leaves_count, const struct net_shaper *leaves, struct net_shaper *node, struct netlink_ext_ack *extack) { struct net_shaper_handle parent = leaves[0].parent; int i; for (i = 1; i < leaves_count; ++i) { if (net_shaper_handle_cmp(&leaves[i].parent, &parent)) { NL_SET_ERR_MSG_FMT(extack, "All the leaves shapers must have the same old parent"); return -EINVAL; } } node->parent = parent; return 0; } static int __net_shaper_group(struct net_shaper_binding *binding, bool update_node, int leaves_count, struct net_shaper *leaves, struct net_shaper *node, struct netlink_ext_ack *extack) { const struct net_shaper_ops *ops = net_shaper_ops(binding); struct net_shaper_handle leaf_handle; struct net_shaper *parent = NULL; bool new_node = false; int i, ret; if (node->handle.scope == NET_SHAPER_SCOPE_NODE) { new_node = node->handle.id == NET_SHAPER_ID_UNSPEC; if (!new_node && !net_shaper_lookup(binding, &node->handle)) { /* The related attribute is not available when * reaching here from the delete() op. */ NL_SET_ERR_MSG_FMT(extack, "Node shaper %d:%d does not exists", node->handle.scope, node->handle.id); return -ENOENT; } /* When unspecified, the node parent scope is inherited from * the leaves. */ if (node->parent.scope == NET_SHAPER_SCOPE_UNSPEC) { ret = net_shaper_parent_from_leaves(leaves_count, leaves, node, extack); if (ret) return ret; } } else { net_shaper_default_parent(&node->handle, &node->parent); } if (node->parent.scope == NET_SHAPER_SCOPE_NODE) { parent = net_shaper_lookup(binding, &node->parent); if (!parent) { NL_SET_ERR_MSG_FMT(extack, "Node parent shaper %d:%d does not exists", node->parent.scope, node->parent.id); return -ENOENT; } ret = net_shaper_validate_nesting(binding, node, extack); if (ret < 0) return ret; } if (update_node) { /* For newly created node scope shaper, the following will * update the handle, due to id allocation. */ ret = net_shaper_pre_insert(binding, &node->handle, extack); if (ret) return ret; } for (i = 0; i < leaves_count; ++i) { leaf_handle = leaves[i].handle; ret = net_shaper_pre_insert(binding, &leaf_handle, extack); if (ret) goto rollback; if (!net_shaper_handle_cmp(&leaves[i].parent, &node->handle)) continue; /* The leaves shapers will be nested to the node, update the * linking accordingly. */ leaves[i].parent = node->handle; node->leaves++; } ret = ops->group(binding, leaves_count, leaves, node, extack); if (ret < 0) goto rollback; /* The node's parent gains a new leaf only when the node itself * is created by this group operation */ if (new_node && parent) parent->leaves++; if (update_node) net_shaper_commit(binding, 1, node); net_shaper_commit(binding, leaves_count, leaves); return 0; rollback: net_shaper_rollback(binding); return ret; } static int net_shaper_pre_del_node(struct net_shaper_binding *binding, const struct net_shaper *shaper, struct netlink_ext_ack *extack) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); struct net_shaper *cur, *leaves, node = {}; int ret, leaves_count = 0; unsigned long index; bool update_node; if (!shaper->leaves) return 0; /* Fetch the new node information. */ node.handle = shaper->parent; cur = net_shaper_lookup(binding, &node.handle); if (cur) { node = *cur; } else { /* A scope NODE shaper can be nested only to the NETDEV scope * shaper without creating the latter, this check may fail only * if the data is in inconsistent status. */ if (WARN_ON_ONCE(node.handle.scope != NET_SHAPER_SCOPE_NETDEV)) return -EINVAL; } leaves = kcalloc(shaper->leaves, sizeof(struct net_shaper), GFP_KERNEL); if (!leaves) return -ENOMEM; /* Build the leaves arrays. */ xa_for_each(&hierarchy->shapers, index, cur) { if (net_shaper_handle_cmp(&cur->parent, &shaper->handle)) continue; if (WARN_ON_ONCE(leaves_count == shaper->leaves)) { ret = -EINVAL; goto free; } leaves[leaves_count++] = *cur; } /* When re-linking to the netdev shaper, avoid the eventual, implicit, * creation of the new node, would be surprising since the user is * doing a delete operation. */ update_node = node.handle.scope != NET_SHAPER_SCOPE_NETDEV; ret = __net_shaper_group(binding, update_node, leaves_count, leaves, &node, extack); free: kfree(leaves); return ret; } int net_shaper_nl_delete_doit(struct sk_buff *skb, struct genl_info *info) { struct net_shaper_hierarchy *hierarchy; struct net_shaper_binding *binding; struct net_shaper_handle handle; struct net_shaper *shaper; int ret; if (GENL_REQ_ATTR_CHECK(info, NET_SHAPER_A_HANDLE)) return -EINVAL; binding = net_shaper_binding_from_ctx(info->ctx); net_shaper_lock(binding); ret = net_shaper_parse_handle(info->attrs[NET_SHAPER_A_HANDLE], info, &handle); if (ret) goto unlock; hierarchy = net_shaper_hierarchy(binding); if (!hierarchy) { ret = -ENOENT; goto unlock; } shaper = net_shaper_lookup(binding, &handle); if (!shaper) { ret = -ENOENT; goto unlock; } if (handle.scope == NET_SHAPER_SCOPE_NODE) { ret = net_shaper_pre_del_node(binding, shaper, info->extack); if (ret) goto unlock; } ret = __net_shaper_delete(binding, shaper, info->extack); unlock: net_shaper_unlock(binding); return ret; } static int net_shaper_group_send_reply(struct net_shaper_binding *binding, const struct net_shaper_handle *handle, struct genl_info *info, struct sk_buff *msg) { void *hdr; hdr = genlmsg_iput(msg, info); if (!hdr) goto free_msg; if (net_shaper_fill_binding(msg, binding, NET_SHAPER_A_IFINDEX) || net_shaper_fill_handle(msg, handle, NET_SHAPER_A_HANDLE)) goto free_msg; genlmsg_end(msg, hdr); return genlmsg_reply(msg, info); free_msg: /* Should never happen as msg is pre-allocated with enough space. */ WARN_ONCE(true, "calculated message payload length (%d)", net_shaper_handle_size()); nlmsg_free(msg); return -EMSGSIZE; } int net_shaper_nl_group_doit(struct sk_buff *skb, struct genl_info *info) { struct net_shaper **old_nodes, *leaves, node = {}; struct net_shaper_hierarchy *hierarchy; struct net_shaper_binding *binding; int i, ret, rem, leaves_count; int old_nodes_count = 0; struct sk_buff *msg; struct nlattr *attr; if (GENL_REQ_ATTR_CHECK(info, NET_SHAPER_A_LEAVES)) return -EINVAL; binding = net_shaper_binding_from_ctx(info->ctx); /* The group operation is optional. */ if (!net_shaper_ops(binding)->group) return -EOPNOTSUPP; net_shaper_lock(binding); leaves_count = net_shaper_list_len(info, NET_SHAPER_A_LEAVES); if (!leaves_count) { NL_SET_BAD_ATTR(info->extack, info->attrs[NET_SHAPER_A_LEAVES]); ret = -EINVAL; goto unlock; } leaves = kcalloc(leaves_count, sizeof(struct net_shaper) + sizeof(struct net_shaper *), GFP_KERNEL); if (!leaves) { ret = -ENOMEM; goto unlock; } old_nodes = (void *)&leaves[leaves_count]; ret = net_shaper_parse_node(binding, info->attrs, info, &node); if (ret) goto free_leaves; i = 0; nla_for_each_attr_type(attr, NET_SHAPER_A_LEAVES, genlmsg_data(info->genlhdr), genlmsg_len(info->genlhdr), rem) { if (WARN_ON_ONCE(i >= leaves_count)) goto free_leaves; ret = net_shaper_parse_leaf(binding, attr, info, &node, &leaves[i]); if (ret) goto free_leaves; i++; } /* Prepare the msg reply in advance, to avoid device operation * rollback on allocation failure. */ msg = genlmsg_new(net_shaper_handle_size(), GFP_KERNEL); if (!msg) goto free_leaves; hierarchy = net_shaper_hierarchy_setup(binding); if (!hierarchy) { ret = -ENOMEM; goto free_msg; } /* Record the node shapers that this group() operation can make * childless for later cleanup. */ for (i = 0; i < leaves_count; i++) { if (leaves[i].parent.scope == NET_SHAPER_SCOPE_NODE && net_shaper_handle_cmp(&leaves[i].parent, &node.handle)) { struct net_shaper *tmp; tmp = net_shaper_lookup(binding, &leaves[i].parent); if (!tmp) continue; old_nodes[old_nodes_count++] = tmp; } } ret = __net_shaper_group(binding, true, leaves_count, leaves, &node, info->extack); if (ret) goto free_msg; /* Check if we need to delete any node left alone by the new leaves * linkage. */ for (i = 0; i < old_nodes_count; ++i) { struct net_shaper *tmp = old_nodes[i]; if (--tmp->leaves > 0) continue; /* Errors here are not fatal: the grouping operation is * completed, and user-space can still explicitly clean-up * left-over nodes. */ __net_shaper_delete(binding, tmp, info->extack); } ret = net_shaper_group_send_reply(binding, &node.handle, info, msg); if (ret) GENL_SET_ERR_MSG_FMT(info, "Can't send reply"); free_leaves: kfree(leaves); unlock: net_shaper_unlock(binding); return ret; free_msg: kfree_skb(msg); goto free_leaves; } static int net_shaper_cap_fill_one(struct sk_buff *msg, struct net_shaper_binding *binding, enum net_shaper_scope scope, unsigned long flags, const struct genl_info *info) { unsigned long cur; void *hdr; hdr = genlmsg_iput(msg, info); if (!hdr) return -EMSGSIZE; if (net_shaper_fill_binding(msg, binding, NET_SHAPER_A_CAPS_IFINDEX) || nla_put_u32(msg, NET_SHAPER_A_CAPS_SCOPE, scope)) goto nla_put_failure; for (cur = NET_SHAPER_A_CAPS_SUPPORT_METRIC_BPS; cur <= NET_SHAPER_A_CAPS_MAX; ++cur) { if (flags & BIT(cur) && nla_put_flag(msg, cur)) goto nla_put_failure; } genlmsg_end(msg, hdr); return 0; nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE; } int net_shaper_nl_cap_get_doit(struct sk_buff *skb, struct genl_info *info) { struct net_shaper_binding *binding; const struct net_shaper_ops *ops; enum net_shaper_scope scope; unsigned long flags = 0; struct sk_buff *msg; int ret; if (GENL_REQ_ATTR_CHECK(info, NET_SHAPER_A_CAPS_SCOPE)) return -EINVAL; binding = net_shaper_binding_from_ctx(info->ctx); scope = nla_get_u32(info->attrs[NET_SHAPER_A_CAPS_SCOPE]); ops = net_shaper_ops(binding); ops->capabilities(binding, scope, &flags); if (!flags) return -EOPNOTSUPP; msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM; ret = net_shaper_cap_fill_one(msg, binding, scope, flags, info); if (ret) goto free_msg; ret = genlmsg_reply(msg, info); if (ret) goto free_msg; return 0; free_msg: nlmsg_free(msg); return ret; } int net_shaper_nl_cap_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb) { const struct genl_info *info = genl_info_dump(cb); struct net_shaper_binding *binding; const struct net_shaper_ops *ops; enum net_shaper_scope scope; int ret; binding = net_shaper_binding_from_ctx(cb->ctx); ops = net_shaper_ops(binding); for (scope = 0; scope <= NET_SHAPER_SCOPE_MAX; ++scope) { unsigned long flags = 0; ops->capabilities(binding, scope, &flags); if (!flags) continue; ret = net_shaper_cap_fill_one(skb, binding, scope, flags, info); if (ret) return ret; } return 0; } static void net_shaper_flush(struct net_shaper_binding *binding) { struct net_shaper_hierarchy *hierarchy = net_shaper_hierarchy(binding); struct net_shaper *cur; unsigned long index; if (!hierarchy) return; net_shaper_lock(binding); xa_lock(&hierarchy->shapers); xa_for_each(&hierarchy->shapers, index, cur) { __xa_erase(&hierarchy->shapers, index); kfree(cur); } xa_unlock(&hierarchy->shapers); net_shaper_unlock(binding); kfree(hierarchy); } void net_shaper_flush_netdev(struct net_device *dev) { struct net_shaper_binding binding = { .type = NET_SHAPER_BINDING_TYPE_NETDEV, .netdev = dev, }; net_shaper_flush(&binding); } void net_shaper_set_real_num_tx_queues(struct net_device *dev, unsigned int txq) { struct net_shaper_hierarchy *hierarchy; struct net_shaper_binding binding; int i; binding.type = NET_SHAPER_BINDING_TYPE_NETDEV; binding.netdev = dev; hierarchy = net_shaper_hierarchy(&binding); if (!hierarchy) return; /* Only drivers implementing shapers support ensure * the lock is acquired in advance. */ netdev_assert_locked(dev); /* Take action only when decreasing the tx queue number. */ for (i = txq; i < dev->real_num_tx_queues; ++i) { struct net_shaper_handle handle, parent_handle; struct net_shaper *shaper; u32 index; handle.scope = NET_SHAPER_SCOPE_QUEUE; handle.id = i; shaper = net_shaper_lookup(&binding, &handle); if (!shaper) continue; /* Don't touch the H/W for the queue shaper, the drivers already * deleted the queue and related resources. */ parent_handle = shaper->parent; index = net_shaper_handle_to_index(&handle); xa_erase(&hierarchy->shapers, index); kfree_rcu(shaper, rcu); /* The recursion on parent does the full job. */ if (parent_handle.scope != NET_SHAPER_SCOPE_NODE) continue; shaper = net_shaper_lookup(&binding, &parent_handle); if (shaper && !--shaper->leaves) __net_shaper_delete(&binding, shaper, NULL); } } static int __init shaper_init(void) { return genl_register_family(&net_shaper_nl_family); } subsys_initcall(shaper_init); |
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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 | // SPDX-License-Identifier: GPL-2.0-or-later /* */ #include <linux/init.h> #include <linux/slab.h> #include <linux/bitrev.h> #include <linux/ratelimit.h> #include <linux/usb.h> #include <linux/usb/audio.h> #include <linux/usb/audio-v2.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include "usbaudio.h" #include "card.h" #include "quirks.h" #include "endpoint.h" #include "helper.h" #include "pcm.h" #include "clock.h" #include "power.h" #include "media.h" #include "implicit.h" #define SUBSTREAM_FLAG_DATA_EP_STARTED 0 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 /* return the estimated delay based on USB frame counters */ static snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime) { unsigned int current_frame_number; unsigned int frame_diff; int est_delay; int queued; if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) { queued = bytes_to_frames(runtime, subs->inflight_bytes); if (!queued) return 0; } else if (!subs->running) { return 0; } current_frame_number = usb_get_current_frame_number(subs->dev); /* * HCD implementations use different widths, use lower 8 bits. * The delay will be managed up to 256ms, which is more than * enough */ frame_diff = (current_frame_number - subs->last_frame_number) & 0xff; /* Approximation based on number of samples per USB frame (ms), some truncation for 44.1 but the estimate is good enough */ est_delay = frame_diff * runtime->rate / 1000; if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) { est_delay = queued - est_delay; if (est_delay < 0) est_delay = 0; } return est_delay; } /* * return the current pcm pointer. just based on the hwptr_done value. */ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = runtime->private_data; unsigned int hwptr_done; if (atomic_read(&subs->stream->chip->shutdown)) return SNDRV_PCM_POS_XRUN; scoped_guard(spinlock, &subs->lock) { hwptr_done = subs->hwptr_done; runtime->delay = snd_usb_pcm_delay(subs, runtime); } return bytes_to_frames(runtime, hwptr_done); } /* * find a matching audio format */ static const struct audioformat * find_format(struct list_head *fmt_list_head, snd_pcm_format_t format, unsigned int rate, unsigned int channels, bool strict_match, struct snd_usb_substream *subs) { const struct audioformat *fp; const struct audioformat *found = NULL; int cur_attr = 0, attr; list_for_each_entry(fp, fmt_list_head, list) { if (strict_match) { if (!(fp->formats & pcm_format_to_bits(format))) continue; if (fp->channels != channels) continue; } if (rate < fp->rate_min || rate > fp->rate_max) continue; if (!(fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { unsigned int i; for (i = 0; i < fp->nr_rates; i++) if (fp->rate_table[i] == rate) break; if (i >= fp->nr_rates) continue; } attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; if (!found) { found = fp; cur_attr = attr; continue; } /* avoid async out and adaptive in if the other method * supports the same format. * this is a workaround for the case like * M-audio audiophile USB. */ if (subs && attr != cur_attr) { if ((attr == USB_ENDPOINT_SYNC_ASYNC && subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || (attr == USB_ENDPOINT_SYNC_ADAPTIVE && subs->direction == SNDRV_PCM_STREAM_CAPTURE)) continue; if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { found = fp; cur_attr = attr; continue; } } /* find the format with the largest max. packet size */ if (fp->maxpacksize > found->maxpacksize) { found = fp; cur_attr = attr; } } return found; } const struct audioformat * snd_usb_find_format(struct list_head *fmt_list_head, snd_pcm_format_t format, unsigned int rate, unsigned int channels, bool strict_match, struct snd_usb_substream *subs) { return find_format(fmt_list_head, format, rate, channels, strict_match, subs); } EXPORT_SYMBOL_GPL(snd_usb_find_format); static const struct audioformat * find_substream_format(struct snd_usb_substream *subs, const struct snd_pcm_hw_params *params) { return find_format(&subs->fmt_list, params_format(params), params_rate(params), params_channels(params), true, subs); } const struct audioformat * snd_usb_find_substream_format(struct snd_usb_substream *subs, const struct snd_pcm_hw_params *params) { return find_substream_format(subs, params); } EXPORT_SYMBOL_GPL(snd_usb_find_substream_format); bool snd_usb_pcm_has_fixed_rate(struct snd_usb_substream *subs) { const struct audioformat *fp; struct snd_usb_audio *chip; int rate = -1; if (!subs) return false; chip = subs->stream->chip; if (!(chip->quirk_flags & QUIRK_FLAG_FIXED_RATE)) return false; list_for_each_entry(fp, &subs->fmt_list, list) { if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) return false; if (fp->nr_rates < 1) continue; if (fp->nr_rates > 1) return false; if (rate < 0) { rate = fp->rate_table[0]; continue; } if (rate != fp->rate_table[0]) return false; } return true; } static int init_pitch_v1(struct snd_usb_audio *chip, int ep) { struct usb_device *dev = chip->dev; unsigned char data[1]; int err; data[0] = 1; err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, data, sizeof(data)); return err; } static int init_pitch_v2(struct snd_usb_audio *chip, int ep) { struct usb_device *dev = chip->dev; unsigned char data[1]; int err; data[0] = 1; err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, UAC2_EP_CS_PITCH << 8, 0, data, sizeof(data)); return err; } /* * initialize the pitch control and sample rate */ int snd_usb_init_pitch(struct snd_usb_audio *chip, const struct audioformat *fmt) { int err; /* if endpoint doesn't have pitch control, bail out */ if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) return 0; usb_audio_dbg(chip, "enable PITCH for EP 0x%x\n", fmt->endpoint); switch (fmt->protocol) { case UAC_VERSION_1: err = init_pitch_v1(chip, fmt->endpoint); break; case UAC_VERSION_2: err = init_pitch_v2(chip, fmt->endpoint); break; default: return 0; } if (err < 0) { usb_audio_err(chip, "failed to enable PITCH for EP 0x%x\n", fmt->endpoint); return err; } return 0; } static bool stop_endpoints(struct snd_usb_substream *subs, bool keep_pending) { bool stopped = 0; if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { snd_usb_endpoint_stop(subs->sync_endpoint, keep_pending); stopped = true; } if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { snd_usb_endpoint_stop(subs->data_endpoint, keep_pending); stopped = true; } return stopped; } static int start_endpoints(struct snd_usb_substream *subs) { int err; if (!subs->data_endpoint) return -EINVAL; if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { err = snd_usb_endpoint_start(subs->data_endpoint); if (err < 0) { clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); goto error; } } if (subs->sync_endpoint && !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { err = snd_usb_endpoint_start(subs->sync_endpoint); if (err < 0) { clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); goto error; } } return 0; error: stop_endpoints(subs, false); return err; } static void sync_pending_stops(struct snd_usb_substream *subs) { snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); } /* PCM sync_stop callback */ static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs = substream->runtime->private_data; sync_pending_stops(subs); return 0; } /* Set up sync endpoint */ int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip, struct audioformat *fmt) { struct usb_device *dev = chip->dev; struct usb_host_interface *alts; struct usb_interface_descriptor *altsd; unsigned int ep, attr, sync_attr; bool is_playback; int err; if (fmt->sync_ep) return 0; /* already set up */ alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting); if (!alts) return 0; altsd = get_iface_desc(alts); err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts); if (err > 0) return 0; /* matched */ /* * Generic sync EP handling */ if (fmt->ep_idx > 0 || altsd->bNumEndpoints < 2) return 0; is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC || attr == USB_ENDPOINT_SYNC_ADAPTIVE)) || (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE)) return 0; sync_attr = get_endpoint(alts, 1)->bmAttributes; /* * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see * if we don't find a sync endpoint, as on M-Audio Transit. In case of * error fall back to SYNC mode and don't create sync endpoint */ /* check sync-pipe endpoint */ /* ... and check descriptor size before accessing bSynchAddress because there is a version of the SB Audigy 2 NX firmware lacking the audio fields in the endpoint descriptors */ if ((sync_attr & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC || (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && get_endpoint(alts, 1)->bSynchAddress != 0)) { dev_err(&dev->dev, "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", fmt->iface, fmt->altsetting, get_endpoint(alts, 1)->bmAttributes, get_endpoint(alts, 1)->bLength, get_endpoint(alts, 1)->bSynchAddress); if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) return 0; return -EINVAL; } ep = get_endpoint(alts, 1)->bEndpointAddress; if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && get_endpoint(alts, 0)->bSynchAddress != 0 && ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { dev_err(&dev->dev, "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", fmt->iface, fmt->altsetting, is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) return 0; return -EINVAL; } fmt->sync_ep = ep; fmt->sync_iface = altsd->bInterfaceNumber; fmt->sync_altsetting = altsd->bAlternateSetting; fmt->sync_ep_idx = 1; if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB) fmt->implicit_fb = 1; dev_dbg(&dev->dev, "%d:%d: found sync_ep=0x%x, iface=%d, alt=%d, implicit_fb=%d\n", fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface, fmt->sync_altsetting, fmt->implicit_fb); return 0; } static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state) { int ret; if (!subs->str_pd) return 0; ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state); if (ret < 0) { dev_err(&subs->dev->dev, "Cannot change Power Domain ID: %d to state: %d. Err: %d\n", subs->str_pd->pd_id, state, ret); return ret; } return 0; } int snd_usb_pcm_suspend(struct snd_usb_stream *as) { int ret; ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2); if (ret < 0) return ret; ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2); if (ret < 0) return ret; return 0; } int snd_usb_pcm_resume(struct snd_usb_stream *as) { int ret; ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1); if (ret < 0) return ret; ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1); if (ret < 0) return ret; return 0; } static void close_endpoints(struct snd_usb_audio *chip, struct snd_usb_substream *subs) { if (subs->data_endpoint) { snd_usb_endpoint_set_sync(chip, subs->data_endpoint, NULL); snd_usb_endpoint_close(chip, subs->data_endpoint); subs->data_endpoint = NULL; } if (subs->sync_endpoint) { snd_usb_endpoint_close(chip, subs->sync_endpoint); subs->sync_endpoint = NULL; } } int snd_usb_hw_params(struct snd_usb_substream *subs, struct snd_pcm_hw_params *hw_params) { struct snd_usb_audio *chip = subs->stream->chip; const struct audioformat *fmt; const struct audioformat *sync_fmt; bool fixed_rate, sync_fixed_rate; int ret; ret = snd_media_start_pipeline(subs); if (ret) return ret; fixed_rate = snd_usb_pcm_has_fixed_rate(subs); fmt = find_substream_format(subs, hw_params); if (!fmt) { usb_audio_dbg(chip, "cannot find format: format=%s, rate=%d, channels=%d\n", snd_pcm_format_name(params_format(hw_params)), params_rate(hw_params), params_channels(hw_params)); ret = -EINVAL; goto stop_pipeline; } if (fmt->implicit_fb) { sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt, hw_params, !subs->direction, &sync_fixed_rate); if (!sync_fmt) { usb_audio_dbg(chip, "cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n", fmt->sync_ep, fmt->sync_iface, fmt->sync_altsetting, snd_pcm_format_name(params_format(hw_params)), params_rate(hw_params), params_channels(hw_params)); ret = -EINVAL; goto stop_pipeline; } } else { sync_fmt = fmt; sync_fixed_rate = fixed_rate; } ret = snd_usb_lock_shutdown(chip); if (ret < 0) goto stop_pipeline; ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); if (ret < 0) goto unlock; if (subs->data_endpoint) { if (snd_usb_endpoint_compatible(chip, subs->data_endpoint, fmt, hw_params)) goto unlock; if (stop_endpoints(subs, false)) sync_pending_stops(subs); close_endpoints(chip, subs); } subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false, fixed_rate); if (!subs->data_endpoint) { ret = -EINVAL; goto unlock; } if (fmt->sync_ep) { subs->sync_endpoint = snd_usb_endpoint_open(chip, sync_fmt, hw_params, fmt == sync_fmt, sync_fixed_rate); if (!subs->sync_endpoint) { ret = -EINVAL; goto unlock; } snd_usb_endpoint_set_sync(chip, subs->data_endpoint, subs->sync_endpoint); } scoped_guard(mutex, &chip->mutex) { subs->cur_audiofmt = fmt; } if (!subs->data_endpoint->need_setup) goto unlock; if (subs->sync_endpoint) { ret = snd_usb_endpoint_set_params(chip, subs->sync_endpoint); if (ret < 0) goto unlock; } ret = snd_usb_endpoint_set_params(chip, subs->data_endpoint); unlock: if (ret < 0) close_endpoints(chip, subs); snd_usb_unlock_shutdown(chip); stop_pipeline: if (ret < 0) snd_media_stop_pipeline(subs); return ret; } EXPORT_SYMBOL_GPL(snd_usb_hw_params); /* * hw_params callback * * allocate a buffer and set the given audio format. * * so far we use a physically linear buffer although packetize transfer * doesn't need a continuous area. * if sg buffer is supported on the later version of alsa, we'll follow * that. */ static int snd_usb_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_usb_substream *subs = substream->runtime->private_data; return snd_usb_hw_params(subs, hw_params); } int snd_usb_hw_free(struct snd_usb_substream *subs) { struct snd_usb_audio *chip = subs->stream->chip; snd_media_stop_pipeline(subs); scoped_guard(mutex, &chip->mutex) { subs->cur_audiofmt = NULL; } CLASS(snd_usb_lock, pm)(chip); if (!pm.err) { if (stop_endpoints(subs, false)) sync_pending_stops(subs); close_endpoints(chip, subs); } return 0; } EXPORT_SYMBOL_GPL(snd_usb_hw_free); /* * hw_free callback * * reset the audio format and release the buffer */ static int snd_usb_pcm_hw_free(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs = substream->runtime->private_data; return snd_usb_hw_free(subs); } /* free-wheeling mode? (e.g. dmix) */ static int in_free_wheeling_mode(struct snd_pcm_runtime *runtime) { return runtime->stop_threshold > runtime->buffer_size; } /* check whether early start is needed for playback stream */ static int lowlatency_playback_available(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { struct snd_usb_audio *chip = subs->stream->chip; if (subs->direction == SNDRV_PCM_STREAM_CAPTURE) return false; /* disabled via module option? */ if (!chip->lowlatency) return false; if (in_free_wheeling_mode(runtime)) return false; /* implicit feedback mode has own operation mode */ if (snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) return false; return true; } /* * prepare callback * * only a few subtle things... */ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = runtime->private_data; struct snd_usb_audio *chip = subs->stream->chip; int retry = 0; int ret; CLASS(snd_usb_lock, pm)(chip); if (pm.err < 0) return pm.err; if (snd_BUG_ON(!subs->data_endpoint)) return -EIO; ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); if (ret < 0) return ret; again: if (subs->sync_endpoint) { ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); if (ret < 0) return ret; } ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); if (ret < 0) return ret; else if (ret > 0) snd_usb_set_format_quirk(subs, subs->cur_audiofmt); ret = 0; /* reset the pointer */ subs->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size); subs->inflight_bytes = 0; subs->hwptr_done = 0; subs->transfer_done = 0; subs->last_frame_number = 0; subs->period_elapsed_pending = 0; runtime->delay = 0; subs->lowlatency_playback = lowlatency_playback_available(runtime, subs); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK && !subs->lowlatency_playback) { ret = start_endpoints(subs); /* if XRUN happens at starting streams (possibly with implicit * fb case), restart again, but only try once. */ if (ret == -EPIPE && !retry++) { sync_pending_stops(subs); goto again; } } return ret; } /* * h/w constraints */ #ifdef HW_CONST_DEBUG #define hwc_debug(fmt, args...) pr_debug(fmt, ##args) #else #define hwc_debug(fmt, args...) do { } while(0) #endif static const struct snd_pcm_hardware snd_usb_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE, .channels_min = 1, .channels_max = 256, .buffer_bytes_max = INT_MAX, /* limited by BUFFER_TIME later */ .period_bytes_min = 64, .period_bytes_max = INT_MAX, /* limited by PERIOD_TIME later */ .periods_min = 2, .periods_max = 1024, }; static int hw_check_valid_format(struct snd_usb_substream *subs, struct snd_pcm_hw_params *params, const struct audioformat *fp) { struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); struct snd_mask check_fmts; unsigned int ptime; /* check the format */ snd_mask_none(&check_fmts); check_fmts.bits[0] = (u32)fp->formats; check_fmts.bits[1] = (u32)(fp->formats >> 32); snd_mask_intersect(&check_fmts, fmts); if (snd_mask_empty(&check_fmts)) { hwc_debug(" > check: no supported format 0x%llx\n", fp->formats); return 0; } /* check the channels */ if (fp->channels < ct->min || fp->channels > ct->max) { hwc_debug(" > check: no valid channels %d (%d/%d)\n", fp->channels, ct->min, ct->max); return 0; } /* check the rate is within the range */ if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { hwc_debug(" > check: rate_min %d > max %d\n", fp->rate_min, it->max); return 0; } if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { hwc_debug(" > check: rate_max %d < min %d\n", fp->rate_max, it->min); return 0; } /* check whether the period time is >= the data packet interval */ if (subs->speed != USB_SPEED_FULL) { ptime = 125 * (1 << fp->datainterval); if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max); return 0; } } return 1; } static int apply_hw_params_minmax(struct snd_interval *it, unsigned int rmin, unsigned int rmax) { int changed; if (rmin > rmax) { hwc_debug(" --> get empty\n"); it->empty = 1; return -EINVAL; } changed = 0; if (it->min < rmin) { it->min = rmin; it->openmin = 0; changed = 1; } if (it->max > rmax) { it->max = rmax; it->openmax = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%d, %d) (changed = %d)\n", it->min, it->max, changed); return changed; } /* get the specified endpoint object that is being used by other streams * (i.e. the parameter is locked) */ static const struct snd_usb_endpoint * get_endpoint_in_use(struct snd_usb_audio *chip, int endpoint, const struct snd_usb_endpoint *ref_ep) { const struct snd_usb_endpoint *ep; ep = snd_usb_get_endpoint(chip, endpoint); if (ep && ep->cur_audiofmt && (ep != ref_ep || ep->opened > 1)) return ep; return NULL; } static int hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct snd_usb_audio *chip = subs->stream->chip; const struct snd_usb_endpoint *ep; const struct audioformat *fp; struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); unsigned int rmin, rmax, r; int i; hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max); rmin = UINT_MAX; rmax = 0; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; ep = get_endpoint_in_use(chip, fp->endpoint, subs->data_endpoint); if (ep) { hwc_debug("rate limit %d for ep#%x\n", ep->cur_rate, fp->endpoint); rmin = min(rmin, ep->cur_rate); rmax = max(rmax, ep->cur_rate); continue; } if (fp->implicit_fb) { ep = get_endpoint_in_use(chip, fp->sync_ep, subs->sync_endpoint); if (ep) { hwc_debug("rate limit %d for sync_ep#%x\n", ep->cur_rate, fp->sync_ep); rmin = min(rmin, ep->cur_rate); rmax = max(rmax, ep->cur_rate); continue; } } r = snd_usb_endpoint_get_clock_rate(chip, fp->clock); if (r > 0) { if (!snd_interval_test(it, r)) continue; rmin = min(rmin, r); rmax = max(rmax, r); continue; } if (fp->rate_table && fp->nr_rates) { for (i = 0; i < fp->nr_rates; i++) { r = fp->rate_table[i]; if (!snd_interval_test(it, r)) continue; rmin = min(rmin, r); rmax = max(rmax, r); } } else { rmin = min(rmin, fp->rate_min); rmax = max(rmax, fp->rate_max); } } return apply_hw_params_minmax(it, rmin, rmax); } static int hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; const struct audioformat *fp; struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); unsigned int rmin, rmax; hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max); rmin = UINT_MAX; rmax = 0; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; rmin = min(rmin, fp->channels); rmax = max(rmax, fp->channels); } return apply_hw_params_minmax(it, rmin, rmax); } static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits) { u32 oldbits[2]; int changed; oldbits[0] = fmt->bits[0]; oldbits[1] = fmt->bits[1]; fmt->bits[0] &= (u32)fbits; fmt->bits[1] &= (u32)(fbits >> 32); if (!fmt->bits[0] && !fmt->bits[1]) { hwc_debug(" --> get empty\n"); return -EINVAL; } changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); hwc_debug(" --> %x:%x (changed = %d)\n", fmt->bits[0], fmt->bits[1], changed); return changed; } static int hw_rule_format(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct snd_usb_audio *chip = subs->stream->chip; const struct snd_usb_endpoint *ep; const struct audioformat *fp; struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); u64 fbits; hwc_debug("hw_rule_format: %x:%x\n", fmt->bits[0], fmt->bits[1]); fbits = 0; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; ep = get_endpoint_in_use(chip, fp->endpoint, subs->data_endpoint); if (ep) { hwc_debug("format limit %d for ep#%x\n", ep->cur_format, fp->endpoint); fbits |= pcm_format_to_bits(ep->cur_format); continue; } if (fp->implicit_fb) { ep = get_endpoint_in_use(chip, fp->sync_ep, subs->sync_endpoint); if (ep) { hwc_debug("format limit %d for sync_ep#%x\n", ep->cur_format, fp->sync_ep); fbits |= pcm_format_to_bits(ep->cur_format); continue; } } fbits |= fp->formats; } return apply_hw_params_format_bits(fmt, fbits); } static int hw_rule_period_time(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; const struct audioformat *fp; struct snd_interval *it; unsigned char min_datainterval; unsigned int pmin; it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max); min_datainterval = 0xff; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; min_datainterval = min(min_datainterval, fp->datainterval); } if (min_datainterval == 0xff) { hwc_debug(" --> get empty\n"); it->empty = 1; return -EINVAL; } pmin = 125 * (1 << min_datainterval); return apply_hw_params_minmax(it, pmin, UINT_MAX); } /* additional hw constraints for implicit feedback mode */ static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct snd_usb_audio *chip = subs->stream->chip; const struct audioformat *fp; const struct snd_usb_endpoint *ep; struct snd_interval *it; unsigned int rmin, rmax; it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE); hwc_debug("hw_rule_period_size: (%u,%u)\n", it->min, it->max); rmin = UINT_MAX; rmax = 0; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; ep = get_endpoint_in_use(chip, fp->endpoint, subs->data_endpoint); if (ep) { hwc_debug("period size limit %d for ep#%x\n", ep->cur_period_frames, fp->endpoint); rmin = min(rmin, ep->cur_period_frames); rmax = max(rmax, ep->cur_period_frames); continue; } if (fp->implicit_fb) { ep = get_endpoint_in_use(chip, fp->sync_ep, subs->sync_endpoint); if (ep) { hwc_debug("period size limit %d for sync_ep#%x\n", ep->cur_period_frames, fp->sync_ep); rmin = min(rmin, ep->cur_period_frames); rmax = max(rmax, ep->cur_period_frames); continue; } } } if (!rmax) return 0; /* no limit by implicit fb */ return apply_hw_params_minmax(it, rmin, rmax); } static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct snd_usb_audio *chip = subs->stream->chip; const struct audioformat *fp; const struct snd_usb_endpoint *ep; struct snd_interval *it; unsigned int rmin, rmax; it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS); hwc_debug("hw_rule_periods: (%u,%u)\n", it->min, it->max); rmin = UINT_MAX; rmax = 0; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; ep = get_endpoint_in_use(chip, fp->endpoint, subs->data_endpoint); if (ep) { hwc_debug("periods limit %d for ep#%x\n", ep->cur_buffer_periods, fp->endpoint); rmin = min(rmin, ep->cur_buffer_periods); rmax = max(rmax, ep->cur_buffer_periods); continue; } if (fp->implicit_fb) { ep = get_endpoint_in_use(chip, fp->sync_ep, subs->sync_endpoint); if (ep) { hwc_debug("periods limit %d for sync_ep#%x\n", ep->cur_buffer_periods, fp->sync_ep); rmin = min(rmin, ep->cur_buffer_periods); rmax = max(rmax, ep->cur_buffer_periods); continue; } } } if (!rmax) return 0; /* no limit by implicit fb */ return apply_hw_params_minmax(it, rmin, rmax); } /* * set up the runtime hardware information. */ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { const struct audioformat *fp; unsigned int pt, ptmin; int param_period_time_if_needed = -1; int err; runtime->hw.formats = subs->formats; runtime->hw.rate_min = 0x7fffffff; runtime->hw.rate_max = 0; runtime->hw.channels_min = 256; runtime->hw.channels_max = 0; runtime->hw.rates = 0; ptmin = UINT_MAX; /* check min/max rates and channels */ list_for_each_entry(fp, &subs->fmt_list, list) { runtime->hw.rates |= fp->rates; if (runtime->hw.rate_min > fp->rate_min) runtime->hw.rate_min = fp->rate_min; if (runtime->hw.rate_max < fp->rate_max) runtime->hw.rate_max = fp->rate_max; if (runtime->hw.channels_min > fp->channels) runtime->hw.channels_min = fp->channels; if (runtime->hw.channels_max < fp->channels) runtime->hw.channels_max = fp->channels; if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { /* FIXME: there might be more than one audio formats... */ runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = fp->frame_size; } pt = 125 * (1 << fp->datainterval); ptmin = min(ptmin, pt); } param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; if (subs->speed == USB_SPEED_FULL) /* full speed devices have fixed data packet interval */ ptmin = 1000; if (ptmin == 1000) /* if period time doesn't go below 1 ms, no rules needed */ param_period_time_if_needed = -1; err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, ptmin, UINT_MAX); if (err < 0) return err; err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, hw_rule_rate, subs, SNDRV_PCM_HW_PARAM_RATE, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, param_period_time_if_needed, -1); if (err < 0) return err; err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, hw_rule_channels, subs, SNDRV_PCM_HW_PARAM_CHANNELS, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_RATE, param_period_time_if_needed, -1); if (err < 0) return err; err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, hw_rule_format, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_RATE, SNDRV_PCM_HW_PARAM_CHANNELS, param_period_time_if_needed, -1); if (err < 0) return err; if (param_period_time_if_needed >= 0) { err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, hw_rule_period_time, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, SNDRV_PCM_HW_PARAM_RATE, -1); if (err < 0) return err; } /* set max period and buffer sizes for 1 and 2 seconds, respectively */ err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 0, 1000000); if (err < 0) return err; err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_TIME, 0, 2000000); if (err < 0) return err; /* additional hw constraints for implicit fb */ err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, hw_rule_period_size_implicit_fb, subs, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1); if (err < 0) return err; err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS, hw_rule_periods_implicit_fb, subs, SNDRV_PCM_HW_PARAM_PERIODS, -1); if (err < 0) return err; list_for_each_entry(fp, &subs->fmt_list, list) { if (fp->implicit_fb) { runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX; break; } } return 0; } static int snd_usb_pcm_open(struct snd_pcm_substream *substream) { int direction = substream->stream; struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = &as->substream[direction]; struct snd_usb_audio *chip = subs->stream->chip; int ret; scoped_guard(mutex, &chip->mutex) { if (subs->opened) return -EBUSY; subs->opened = 1; } runtime->hw = snd_usb_hardware; /* need an explicit sync to catch applptr update in low-latency mode */ if (direction == SNDRV_PCM_STREAM_PLAYBACK && as->chip->lowlatency) runtime->hw.info |= SNDRV_PCM_INFO_SYNC_APPLPTR; runtime->private_data = subs; subs->pcm_substream = substream; /* runtime PM is also done there */ /* initialize DSD/DOP context */ subs->dsd_dop.byte_idx = 0; subs->dsd_dop.channel = 0; subs->dsd_dop.marker = 1; ret = setup_hw_info(runtime, subs); if (ret < 0) goto err_open; ret = snd_usb_autoresume(subs->stream->chip); if (ret < 0) goto err_open; ret = snd_media_stream_init(subs, as->pcm, direction); if (ret < 0) goto err_resume; return 0; err_resume: snd_usb_autosuspend(subs->stream->chip); err_open: scoped_guard(mutex, &chip->mutex) { subs->opened = 0; } return ret; } static int snd_usb_pcm_close(struct snd_pcm_substream *substream) { int direction = substream->stream; struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_usb_substream *subs = &as->substream[direction]; struct snd_usb_audio *chip = subs->stream->chip; int ret; snd_media_stop_pipeline(subs); { CLASS(snd_usb_lock, pm)(subs->stream->chip); if (pm.err) return pm.err; ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1); if (ret < 0) return ret; } subs->pcm_substream = NULL; snd_usb_autosuspend(subs->stream->chip); scoped_guard(mutex, &chip->mutex) { subs->opened = 0; } return 0; } /* Since a URB can handle only a single linear buffer, we must use double * buffering when the data to be transferred overflows the buffer boundary. * To avoid inconsistencies when updating hwptr_done, we use double buffering * for all URBs. */ static void retire_capture_urb(struct snd_usb_substream *subs, struct urb *urb) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; unsigned int stride, frames, bytes, oldptr; int i, period_elapsed = 0; unsigned char *cp; int current_frame_number; /* read frame number here, update pointer in critical section */ current_frame_number = usb_get_current_frame_number(subs->dev); stride = runtime->frame_bits >> 3; for (i = 0; i < urb->number_of_packets; i++) { cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj; if (urb->iso_frame_desc[i].status) dev_dbg_ratelimited(&subs->dev->dev, "frame %d active: %d\n", i, urb->iso_frame_desc[i].status); bytes = urb->iso_frame_desc[i].actual_length; if (subs->stream_offset_adj > 0) { unsigned int adj = min(subs->stream_offset_adj, bytes); cp += adj; bytes -= adj; subs->stream_offset_adj -= adj; } frames = bytes / stride; if (!subs->txfr_quirk) bytes = frames * stride; if (bytes % (runtime->sample_bits >> 3) != 0) { int oldbytes = bytes; bytes = frames * stride; dev_warn_ratelimited(&subs->dev->dev, "Corrected urb data len. %d->%d\n", oldbytes, bytes); } /* update the current pointer */ scoped_guard(spinlock_irqsave, &subs->lock) { oldptr = subs->hwptr_done; subs->hwptr_done += bytes; if (subs->hwptr_done >= subs->buffer_bytes) subs->hwptr_done -= subs->buffer_bytes; frames = (bytes + (oldptr % stride)) / stride; subs->transfer_done += frames; if (subs->transfer_done >= runtime->period_size) { subs->transfer_done -= runtime->period_size; period_elapsed = 1; } /* realign last_frame_number */ subs->last_frame_number = current_frame_number; } /* copy a data chunk */ if (oldptr + bytes > subs->buffer_bytes) { unsigned int bytes1 = subs->buffer_bytes - oldptr; memcpy(runtime->dma_area + oldptr, cp, bytes1); memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); } else { memcpy(runtime->dma_area + oldptr, cp, bytes); } } if (period_elapsed) snd_pcm_period_elapsed(subs->pcm_substream); } static void urb_ctx_queue_advance(struct snd_usb_substream *subs, struct urb *urb, unsigned int bytes) { struct snd_urb_ctx *ctx = urb->context; ctx->queued += bytes; subs->inflight_bytes += bytes; subs->hwptr_done += bytes; if (subs->hwptr_done >= subs->buffer_bytes) subs->hwptr_done -= subs->buffer_bytes; } static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, struct urb *urb, unsigned int bytes) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; unsigned int dst_idx = 0; unsigned int src_idx = subs->hwptr_done; unsigned int wrap = subs->buffer_bytes; u8 *dst = urb->transfer_buffer; u8 *src = runtime->dma_area; static const u8 marker[] = { 0x05, 0xfa }; unsigned int queued = 0; /* * The DSP DOP format defines a way to transport DSD samples over * normal PCM data endpoints. It requires stuffing of marker bytes * (0x05 and 0xfa, alternating per sample frame), and then expects * 2 additional bytes of actual payload. The whole frame is stored * LSB. * * Hence, for a stereo transport, the buffer layout looks like this, * where L refers to left channel samples and R to right. * * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa * ..... * */ while (bytes--) { if (++subs->dsd_dop.byte_idx == 3) { /* frame boundary? */ dst[dst_idx++] = marker[subs->dsd_dop.marker]; src_idx += 2; subs->dsd_dop.byte_idx = 0; if (++subs->dsd_dop.channel % runtime->channels == 0) { /* alternate the marker */ subs->dsd_dop.marker++; subs->dsd_dop.marker %= ARRAY_SIZE(marker); subs->dsd_dop.channel = 0; } } else { /* stuff the DSD payload */ int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap; if (subs->cur_audiofmt->dsd_bitrev) dst[dst_idx++] = bitrev8(src[idx]); else dst[dst_idx++] = src[idx]; queued++; } } urb_ctx_queue_advance(subs, urb, queued); } /* copy bit-reversed bytes onto transfer buffer */ static void fill_playback_urb_dsd_bitrev(struct snd_usb_substream *subs, struct urb *urb, unsigned int bytes) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; const u8 *src = runtime->dma_area; u8 *buf = urb->transfer_buffer; int i, ofs = subs->hwptr_done; for (i = 0; i < bytes; i++) { *buf++ = bitrev8(src[ofs]); if (++ofs >= subs->buffer_bytes) ofs = 0; } urb_ctx_queue_advance(subs, urb, bytes); } static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb, int offset, int stride, unsigned int bytes) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; if (subs->hwptr_done + bytes > subs->buffer_bytes) { /* err, the transferred area goes over buffer boundary. */ unsigned int bytes1 = subs->buffer_bytes - subs->hwptr_done; memcpy(urb->transfer_buffer + offset, runtime->dma_area + subs->hwptr_done, bytes1); memcpy(urb->transfer_buffer + offset + bytes1, runtime->dma_area, bytes - bytes1); } else { memcpy(urb->transfer_buffer + offset, runtime->dma_area + subs->hwptr_done, bytes); } urb_ctx_queue_advance(subs, urb, bytes); } static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs, struct urb *urb, int stride, unsigned int bytes) { __le32 packet_length; int i; /* Put __le32 length descriptor at start of each packet. */ for (i = 0; i < urb->number_of_packets; i++) { unsigned int length = urb->iso_frame_desc[i].length; unsigned int offset = urb->iso_frame_desc[i].offset; packet_length = cpu_to_le32(length); offset += i * sizeof(packet_length); urb->iso_frame_desc[i].offset = offset; urb->iso_frame_desc[i].length += sizeof(packet_length); memcpy(urb->transfer_buffer + offset, &packet_length, sizeof(packet_length)); copy_to_urb(subs, urb, offset + sizeof(packet_length), stride, length); } /* Adjust transfer size accordingly. */ bytes += urb->number_of_packets * sizeof(packet_length); return bytes; } static int prepare_playback_urb(struct snd_usb_substream *subs, struct urb *urb, bool in_stream_lock) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; struct snd_usb_endpoint *ep = subs->data_endpoint; struct snd_urb_ctx *ctx = urb->context; unsigned int frames, bytes; int counts; unsigned int transfer_done, frame_limit, avail = 0; int i, stride, period_elapsed = 0; stride = ep->stride; frames = 0; ctx->queued = 0; urb->number_of_packets = 0; scoped_guard(spinlock_irqsave, &subs->lock) { frame_limit = subs->frame_limit + ep->max_urb_frames; transfer_done = subs->transfer_done; if (subs->lowlatency_playback && runtime->state != SNDRV_PCM_STATE_DRAINING) { unsigned int hwptr = subs->hwptr_done / stride; /* calculate the byte offset-in-buffer of the appl_ptr */ avail = (runtime->control->appl_ptr - runtime->hw_ptr_base) % runtime->buffer_size; if (avail <= hwptr) avail += runtime->buffer_size; avail -= hwptr; } for (i = 0; i < ctx->packets; i++) { counts = snd_usb_endpoint_next_packet_size(ep, ctx, i, avail); if (counts < 0) break; /* set up descriptor */ urb->iso_frame_desc[i].offset = frames * stride; urb->iso_frame_desc[i].length = counts * stride; frames += counts; avail -= counts; urb->number_of_packets++; transfer_done += counts; if (transfer_done >= runtime->period_size) { transfer_done -= runtime->period_size; frame_limit = 0; period_elapsed = 1; if (subs->fmt_type == UAC_FORMAT_TYPE_II) { if (transfer_done > 0) { /* FIXME: fill-max mode is not * supported yet */ frames -= transfer_done; counts -= transfer_done; urb->iso_frame_desc[i].length = counts * stride; transfer_done = 0; } i++; if (i < ctx->packets) { /* add a transfer delimiter */ urb->iso_frame_desc[i].offset = frames * stride; urb->iso_frame_desc[i].length = 0; urb->number_of_packets++; } break; } } /* finish at the period boundary or after enough frames */ if ((period_elapsed || transfer_done >= frame_limit) && !snd_usb_endpoint_implicit_feedback_sink(ep)) break; } if (!frames) return -EAGAIN; bytes = frames * stride; subs->transfer_done = transfer_done; subs->frame_limit = frame_limit; if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE && subs->cur_audiofmt->dsd_dop)) { fill_playback_urb_dsd_dop(subs, urb, bytes); } else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 && subs->cur_audiofmt->dsd_bitrev)) { fill_playback_urb_dsd_bitrev(subs, urb, bytes); } else { /* usual PCM */ if (!subs->tx_length_quirk) copy_to_urb(subs, urb, 0, stride, bytes); else bytes = copy_to_urb_quirk(subs, urb, stride, bytes); /* bytes is now amount of outgoing data */ } subs->last_frame_number = usb_get_current_frame_number(subs->dev); if (subs->trigger_tstamp_pending_update) { /* this is the first actual URB submitted, * update trigger timestamp to reflect actual start time */ snd_pcm_gettime(runtime, &runtime->trigger_tstamp); subs->trigger_tstamp_pending_update = false; } if (period_elapsed && !subs->running && subs->lowlatency_playback) { subs->period_elapsed_pending = 1; period_elapsed = 0; } } urb->transfer_buffer_length = bytes; if (period_elapsed) { if (in_stream_lock) snd_pcm_period_elapsed_under_stream_lock(subs->pcm_substream); else snd_pcm_period_elapsed(subs->pcm_substream); } return 0; } /* * process after playback data complete * - decrease the delay count again */ static void retire_playback_urb(struct snd_usb_substream *subs, struct urb *urb) { struct snd_urb_ctx *ctx = urb->context; bool period_elapsed = false; scoped_guard(spinlock_irqsave, &subs->lock) { if (ctx->queued) { if (subs->inflight_bytes >= ctx->queued) subs->inflight_bytes -= ctx->queued; else subs->inflight_bytes = 0; } subs->last_frame_number = usb_get_current_frame_number(subs->dev); if (subs->running) { period_elapsed = subs->period_elapsed_pending; subs->period_elapsed_pending = 0; } } if (period_elapsed) snd_pcm_period_elapsed(subs->pcm_substream); } /* PCM ack callback for the playback stream; * this plays a role only when the stream is running in low-latency mode. */ static int snd_usb_pcm_playback_ack(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs = substream->runtime->private_data; struct snd_usb_endpoint *ep; if (!subs->lowlatency_playback || !subs->running) return 0; ep = subs->data_endpoint; if (!ep) return 0; /* When no more in-flight URBs available, try to process the pending * outputs here */ if (!ep->active_mask) return snd_usb_queue_pending_output_urbs(ep, true); return 0; } static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd) { struct snd_usb_substream *subs = substream->runtime->private_data; int err; switch (cmd) { case SNDRV_PCM_TRIGGER_START: subs->trigger_tstamp_pending_update = true; fallthrough; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_usb_endpoint_set_callback(subs->data_endpoint, prepare_playback_urb, retire_playback_urb, subs); if (subs->lowlatency_playback && cmd == SNDRV_PCM_TRIGGER_START) { if (in_free_wheeling_mode(substream->runtime)) subs->lowlatency_playback = false; err = start_endpoints(subs); if (err < 0) { snd_usb_endpoint_set_callback(subs->data_endpoint, NULL, NULL, NULL); return err; } } subs->running = 1; dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n", subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting); return 0; case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: stop_endpoints(subs, substream->runtime->state == SNDRV_PCM_STATE_DRAINING); snd_usb_endpoint_set_callback(subs->data_endpoint, NULL, NULL, NULL); subs->running = 0; dev_dbg(&subs->dev->dev, "%d:%d Stop Playback PCM\n", subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting); return 0; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* keep retire_data_urb for delay calculation */ snd_usb_endpoint_set_callback(subs->data_endpoint, NULL, retire_playback_urb, subs); subs->running = 0; dev_dbg(&subs->dev->dev, "%d:%d Pause Playback PCM\n", subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting); return 0; } return -EINVAL; } static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd) { int err; struct snd_usb_substream *subs = substream->runtime->private_data; switch (cmd) { case SNDRV_PCM_TRIGGER_START: err = start_endpoints(subs); if (err < 0) return err; fallthrough; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_usb_endpoint_set_callback(subs->data_endpoint, NULL, retire_capture_urb, subs); subs->last_frame_number = usb_get_current_frame_number(subs->dev); subs->running = 1; dev_dbg(&subs->dev->dev, "%d:%d Start Capture PCM\n", subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting); return 0; case SNDRV_PCM_TRIGGER_SUSPEND: case SNDRV_PCM_TRIGGER_STOP: stop_endpoints(subs, false); fallthrough; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_usb_endpoint_set_callback(subs->data_endpoint, NULL, NULL, NULL); subs->running = 0; dev_dbg(&subs->dev->dev, "%d:%d Stop Capture PCM\n", subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting); return 0; } return -EINVAL; } static const struct snd_pcm_ops snd_usb_playback_ops = { .open = snd_usb_pcm_open, .close = snd_usb_pcm_close, .hw_params = snd_usb_pcm_hw_params, .hw_free = snd_usb_pcm_hw_free, .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_substream_playback_trigger, .sync_stop = snd_usb_pcm_sync_stop, .pointer = snd_usb_pcm_pointer, .ack = snd_usb_pcm_playback_ack, }; static const struct snd_pcm_ops snd_usb_capture_ops = { .open = snd_usb_pcm_open, .close = snd_usb_pcm_close, .hw_params = snd_usb_pcm_hw_params, .hw_free = snd_usb_pcm_hw_free, .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_substream_capture_trigger, .sync_stop = snd_usb_pcm_sync_stop, .pointer = snd_usb_pcm_pointer, }; void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) { const struct snd_pcm_ops *ops; ops = stream == SNDRV_PCM_STREAM_PLAYBACK ? &snd_usb_playback_ops : &snd_usb_capture_ops; snd_pcm_set_ops(pcm, stream, ops); } void snd_usb_preallocate_buffer(struct snd_usb_substream *subs) { struct snd_pcm *pcm = subs->stream->pcm; struct snd_pcm_substream *s = pcm->streams[subs->direction].substream; struct device *dev = subs->dev->bus->sysdev; if (snd_usb_use_vmalloc) snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0); else snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG, dev, 64*1024, 512*1024); } |
| 16 13 13 137 65 71 20 9 9 2 314 32 106 1324 1325 685 644 357 515 314 1958 1958 24 1299 | 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 | #include <linux/init.h> #include <linux/kernel.h> #include <linux/netdevice.h> #include <net/net_namespace.h> #include <net/netfilter/nf_tables.h> #include <linux/netfilter_ipv4.h> #include <linux/netfilter_ipv6.h> #include <linux/netfilter_bridge.h> #include <linux/netfilter_arp.h> #include <net/netfilter/nf_tables_ipv4.h> #include <net/netfilter/nf_tables_ipv6.h> #ifdef CONFIG_NF_TABLES_IPV4 static unsigned int nft_do_chain_ipv4(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); nft_set_pktinfo_ipv4(&pkt); return nft_do_chain(&pkt, priv); } static const struct nft_chain_type nft_chain_filter_ipv4 = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_IPV4, .hook_mask = (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) | (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_POST_ROUTING), .hooks = { [NF_INET_LOCAL_IN] = nft_do_chain_ipv4, [NF_INET_LOCAL_OUT] = nft_do_chain_ipv4, [NF_INET_FORWARD] = nft_do_chain_ipv4, [NF_INET_PRE_ROUTING] = nft_do_chain_ipv4, [NF_INET_POST_ROUTING] = nft_do_chain_ipv4, }, }; static void nft_chain_filter_ipv4_init(void) { nft_register_chain_type(&nft_chain_filter_ipv4); } static void nft_chain_filter_ipv4_fini(void) { nft_unregister_chain_type(&nft_chain_filter_ipv4); } #else static inline void nft_chain_filter_ipv4_init(void) {} static inline void nft_chain_filter_ipv4_fini(void) {} #endif /* CONFIG_NF_TABLES_IPV4 */ #ifdef CONFIG_NF_TABLES_ARP static unsigned int nft_do_chain_arp(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); nft_set_pktinfo_unspec(&pkt); return nft_do_chain(&pkt, priv); } static const struct nft_chain_type nft_chain_filter_arp = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_ARP, .owner = THIS_MODULE, .hook_mask = (1 << NF_ARP_IN) | (1 << NF_ARP_OUT), .hooks = { [NF_ARP_IN] = nft_do_chain_arp, [NF_ARP_OUT] = nft_do_chain_arp, }, }; static void nft_chain_filter_arp_init(void) { nft_register_chain_type(&nft_chain_filter_arp); } static void nft_chain_filter_arp_fini(void) { nft_unregister_chain_type(&nft_chain_filter_arp); } #else static inline void nft_chain_filter_arp_init(void) {} static inline void nft_chain_filter_arp_fini(void) {} #endif /* CONFIG_NF_TABLES_ARP */ #ifdef CONFIG_NF_TABLES_IPV6 static unsigned int nft_do_chain_ipv6(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); nft_set_pktinfo_ipv6(&pkt); return nft_do_chain(&pkt, priv); } static const struct nft_chain_type nft_chain_filter_ipv6 = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_IPV6, .hook_mask = (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) | (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_POST_ROUTING), .hooks = { [NF_INET_LOCAL_IN] = nft_do_chain_ipv6, [NF_INET_LOCAL_OUT] = nft_do_chain_ipv6, [NF_INET_FORWARD] = nft_do_chain_ipv6, [NF_INET_PRE_ROUTING] = nft_do_chain_ipv6, [NF_INET_POST_ROUTING] = nft_do_chain_ipv6, }, }; static void nft_chain_filter_ipv6_init(void) { nft_register_chain_type(&nft_chain_filter_ipv6); } static void nft_chain_filter_ipv6_fini(void) { nft_unregister_chain_type(&nft_chain_filter_ipv6); } #else static inline void nft_chain_filter_ipv6_init(void) {} static inline void nft_chain_filter_ipv6_fini(void) {} #endif /* CONFIG_NF_TABLES_IPV6 */ #ifdef CONFIG_NF_TABLES_INET static unsigned int nft_do_chain_inet(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); switch (state->pf) { case NFPROTO_IPV4: nft_set_pktinfo_ipv4(&pkt); break; case NFPROTO_IPV6: nft_set_pktinfo_ipv6(&pkt); break; default: break; } return nft_do_chain(&pkt, priv); } static unsigned int nft_do_chain_inet_ingress(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nf_hook_state ingress_state = *state; struct nft_pktinfo pkt; switch (skb->protocol) { case htons(ETH_P_IP): /* Original hook is NFPROTO_NETDEV and NF_NETDEV_INGRESS. */ ingress_state.pf = NFPROTO_IPV4; ingress_state.hook = NF_INET_INGRESS; nft_set_pktinfo(&pkt, skb, &ingress_state); if (nft_set_pktinfo_ipv4_ingress(&pkt) < 0) return NF_DROP; break; case htons(ETH_P_IPV6): ingress_state.pf = NFPROTO_IPV6; ingress_state.hook = NF_INET_INGRESS; nft_set_pktinfo(&pkt, skb, &ingress_state); if (nft_set_pktinfo_ipv6_ingress(&pkt) < 0) return NF_DROP; break; default: return NF_ACCEPT; } return nft_do_chain(&pkt, priv); } static const struct nft_chain_type nft_chain_filter_inet = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_INET, .hook_mask = (1 << NF_INET_INGRESS) | (1 << NF_INET_LOCAL_IN) | (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_FORWARD) | (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_POST_ROUTING), .hooks = { [NF_INET_INGRESS] = nft_do_chain_inet_ingress, [NF_INET_LOCAL_IN] = nft_do_chain_inet, [NF_INET_LOCAL_OUT] = nft_do_chain_inet, [NF_INET_FORWARD] = nft_do_chain_inet, [NF_INET_PRE_ROUTING] = nft_do_chain_inet, [NF_INET_POST_ROUTING] = nft_do_chain_inet, }, }; static void nft_chain_filter_inet_init(void) { nft_register_chain_type(&nft_chain_filter_inet); } static void nft_chain_filter_inet_fini(void) { nft_unregister_chain_type(&nft_chain_filter_inet); } #else static inline void nft_chain_filter_inet_init(void) {} static inline void nft_chain_filter_inet_fini(void) {} #endif /* CONFIG_NF_TABLES_IPV6 */ #if IS_ENABLED(CONFIG_NF_TABLES_BRIDGE) static unsigned int nft_do_chain_bridge(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); switch (eth_hdr(skb)->h_proto) { case htons(ETH_P_IP): nft_set_pktinfo_ipv4_validate(&pkt); break; case htons(ETH_P_IPV6): nft_set_pktinfo_ipv6_validate(&pkt); break; default: nft_set_pktinfo_unspec(&pkt); break; } return nft_do_chain(&pkt, priv); } static const struct nft_chain_type nft_chain_filter_bridge = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_BRIDGE, .hook_mask = (1 << NF_BR_PRE_ROUTING) | (1 << NF_BR_LOCAL_IN) | (1 << NF_BR_FORWARD) | (1 << NF_BR_LOCAL_OUT) | (1 << NF_BR_POST_ROUTING), .hooks = { [NF_BR_PRE_ROUTING] = nft_do_chain_bridge, [NF_BR_LOCAL_IN] = nft_do_chain_bridge, [NF_BR_FORWARD] = nft_do_chain_bridge, [NF_BR_LOCAL_OUT] = nft_do_chain_bridge, [NF_BR_POST_ROUTING] = nft_do_chain_bridge, }, }; static void nft_chain_filter_bridge_init(void) { nft_register_chain_type(&nft_chain_filter_bridge); } static void nft_chain_filter_bridge_fini(void) { nft_unregister_chain_type(&nft_chain_filter_bridge); } #else static inline void nft_chain_filter_bridge_init(void) {} static inline void nft_chain_filter_bridge_fini(void) {} #endif /* CONFIG_NF_TABLES_BRIDGE */ #ifdef CONFIG_NF_TABLES_NETDEV static unsigned int nft_do_chain_netdev(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { struct nft_pktinfo pkt; nft_set_pktinfo(&pkt, skb, state); switch (skb->protocol) { case htons(ETH_P_IP): nft_set_pktinfo_ipv4_validate(&pkt); break; case htons(ETH_P_IPV6): nft_set_pktinfo_ipv6_validate(&pkt); break; default: nft_set_pktinfo_unspec(&pkt); break; } return nft_do_chain(&pkt, priv); } static const struct nft_chain_type nft_chain_filter_netdev = { .name = "filter", .type = NFT_CHAIN_T_DEFAULT, .family = NFPROTO_NETDEV, .hook_mask = (1 << NF_NETDEV_INGRESS) | (1 << NF_NETDEV_EGRESS), .hooks = { [NF_NETDEV_INGRESS] = nft_do_chain_netdev, [NF_NETDEV_EGRESS] = nft_do_chain_netdev, }, }; static int nft_netdev_event(unsigned long event, struct net_device *dev, struct nft_base_chain *basechain, bool changename) { struct nft_table *table = basechain->chain.table; struct nf_hook_ops *ops; struct nft_hook *hook; bool match; list_for_each_entry(hook, &basechain->hook_list, list) { ops = nft_hook_find_ops(hook, dev); match = !strncmp(hook->ifname, dev->name, hook->ifnamelen); switch (event) { case NETDEV_UNREGISTER: /* NOP if not found or new name still matching */ if (!ops || (changename && match)) continue; if (!(table->flags & NFT_TABLE_F_DORMANT)) nf_unregister_net_hook(dev_net(dev), ops); list_del_rcu(&ops->list); kfree_rcu(ops, rcu); break; case NETDEV_REGISTER: /* NOP if not matching or already registered */ if (!match || (changename && ops)) continue; ops = kmemdup(&basechain->ops, sizeof(struct nf_hook_ops), GFP_KERNEL_ACCOUNT); if (!ops) return 1; ops->dev = dev; if (!(table->flags & NFT_TABLE_F_DORMANT) && nf_register_net_hook(dev_net(dev), ops)) { kfree(ops); return 1; } list_add_tail_rcu(&ops->list, &hook->ops_list); break; } break; } return 0; } static int __nf_tables_netdev_event(unsigned long event, struct net_device *dev, bool changename) { struct nft_base_chain *basechain; struct nftables_pernet *nft_net; struct nft_chain *chain; struct nft_table *table; nft_net = nft_pernet(dev_net(dev)); list_for_each_entry(table, &nft_net->tables, list) { if (table->family != NFPROTO_NETDEV && table->family != NFPROTO_INET) continue; list_for_each_entry(chain, &table->chains, list) { if (!nft_is_base_chain(chain)) continue; basechain = nft_base_chain(chain); if (table->family == NFPROTO_INET && basechain->ops.hooknum != NF_INET_INGRESS) continue; if (nft_netdev_event(event, dev, basechain, changename)) return 1; } } return 0; } static int nf_tables_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); struct nftables_pernet *nft_net; int ret = NOTIFY_DONE; if (event != NETDEV_REGISTER && event != NETDEV_UNREGISTER && event != NETDEV_CHANGENAME) return NOTIFY_DONE; nft_net = nft_pernet(dev_net(dev)); mutex_lock(&nft_net->commit_mutex); if (event == NETDEV_CHANGENAME) { if (__nf_tables_netdev_event(NETDEV_REGISTER, dev, true)) { ret = NOTIFY_BAD; goto out_unlock; } __nf_tables_netdev_event(NETDEV_UNREGISTER, dev, true); } else if (__nf_tables_netdev_event(event, dev, false)) { ret = NOTIFY_BAD; } out_unlock: mutex_unlock(&nft_net->commit_mutex); return ret; } static struct notifier_block nf_tables_netdev_notifier = { .notifier_call = nf_tables_netdev_event, }; static int nft_chain_filter_netdev_init(void) { int err; nft_register_chain_type(&nft_chain_filter_netdev); err = register_netdevice_notifier(&nf_tables_netdev_notifier); if (err) goto err_register_netdevice_notifier; return 0; err_register_netdevice_notifier: nft_unregister_chain_type(&nft_chain_filter_netdev); return err; } static void nft_chain_filter_netdev_fini(void) { nft_unregister_chain_type(&nft_chain_filter_netdev); unregister_netdevice_notifier(&nf_tables_netdev_notifier); } #else static inline int nft_chain_filter_netdev_init(void) { return 0; } static inline void nft_chain_filter_netdev_fini(void) {} #endif /* CONFIG_NF_TABLES_NETDEV */ int __init nft_chain_filter_init(void) { int err; err = nft_chain_filter_netdev_init(); if (err < 0) return err; nft_chain_filter_ipv4_init(); nft_chain_filter_ipv6_init(); nft_chain_filter_arp_init(); nft_chain_filter_inet_init(); nft_chain_filter_bridge_init(); return 0; } void nft_chain_filter_fini(void) { nft_chain_filter_bridge_fini(); nft_chain_filter_inet_fini(); nft_chain_filter_arp_fini(); nft_chain_filter_ipv6_fini(); nft_chain_filter_ipv4_fini(); nft_chain_filter_netdev_fini(); } |
| 98 98 526 157 862 11 1878 696 8 436 1 1 10 254 42 263 | 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 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for inet_sock * * Authors: Many, reorganised here by * Arnaldo Carvalho de Melo <acme@mandriva.com> */ #ifndef _INET_SOCK_H #define _INET_SOCK_H #include <linux/bitops.h> #include <linux/string.h> #include <linux/types.h> #include <linux/jhash.h> #include <linux/netdevice.h> #include <net/flow.h> #include <net/inet_dscp.h> #include <net/sock.h> #include <net/request_sock.h> #include <net/netns/hash.h> #include <net/tcp_states.h> #include <net/l3mdev.h> /** struct ip_options - IP Options * * @faddr - Saved first hop address * @nexthop - Saved nexthop address in LSRR and SSRR * @is_strictroute - Strict source route * @srr_is_hit - Packet destination addr was our one * @is_changed - IP checksum more not valid * @rr_needaddr - Need to record addr of outgoing dev * @ts_needtime - Need to record timestamp * @ts_needaddr - Need to record addr of outgoing dev */ struct ip_options { __be32 faddr; __be32 nexthop; unsigned char optlen; unsigned char srr; unsigned char rr; unsigned char ts; unsigned char is_strictroute:1, srr_is_hit:1, is_changed:1, rr_needaddr:1, ts_needtime:1, ts_needaddr:1; unsigned char router_alert; unsigned char cipso; unsigned char __pad2; unsigned char __data[]; }; struct ip_options_rcu { struct rcu_head rcu; struct ip_options opt; }; struct ip_options_data { struct ip_options_rcu opt; char data[40]; }; struct inet_request_sock { struct request_sock req; #define ir_loc_addr req.__req_common.skc_rcv_saddr #define ir_rmt_addr req.__req_common.skc_daddr #define ir_num req.__req_common.skc_num #define ir_rmt_port req.__req_common.skc_dport #define ir_v6_rmt_addr req.__req_common.skc_v6_daddr #define ir_v6_loc_addr req.__req_common.skc_v6_rcv_saddr #define ir_iif req.__req_common.skc_bound_dev_if #define ir_cookie req.__req_common.skc_cookie #define ireq_net req.__req_common.skc_net #define ireq_state req.__req_common.skc_state #define ireq_family req.__req_common.skc_family u16 snd_wscale : 4, rcv_wscale : 4, tstamp_ok : 1, sack_ok : 1, wscale_ok : 1, ecn_ok : 1, acked : 1, no_srccheck: 1, smc_ok : 1; u32 ir_mark; union { struct ip_options_rcu __rcu *ireq_opt; #if IS_ENABLED(CONFIG_IPV6) struct { struct ipv6_txoptions *ipv6_opt; struct sk_buff *pktopts; }; #endif }; }; static inline struct inet_request_sock *inet_rsk(const struct request_sock *sk) { return (struct inet_request_sock *)sk; } static inline u32 inet_request_mark(const struct sock *sk, struct sk_buff *skb) { u32 mark = READ_ONCE(sk->sk_mark); if (!mark && READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fwmark_accept)) return skb->mark; return mark; } static inline int inet_request_bound_dev_if(const struct sock *sk, struct sk_buff *skb) { int bound_dev_if = READ_ONCE(sk->sk_bound_dev_if); #ifdef CONFIG_NET_L3_MASTER_DEV struct net *net = sock_net(sk); if (!bound_dev_if && READ_ONCE(net->ipv4.sysctl_tcp_l3mdev_accept)) return l3mdev_master_ifindex_by_index(net, skb->skb_iif); #endif return bound_dev_if; } static inline int inet_sk_bound_l3mdev(const struct sock *sk) { #ifdef CONFIG_NET_L3_MASTER_DEV struct net *net = sock_net(sk); if (!READ_ONCE(net->ipv4.sysctl_tcp_l3mdev_accept)) return l3mdev_master_ifindex_by_index(net, sk->sk_bound_dev_if); #endif return 0; } static inline bool inet_bound_dev_eq(bool l3mdev_accept, int bound_dev_if, int dif, int sdif) { if (!bound_dev_if) return !sdif || l3mdev_accept; return bound_dev_if == dif || bound_dev_if == sdif; } static inline bool inet_sk_bound_dev_eq(const struct net *net, int bound_dev_if, int dif, int sdif) { #if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV) return inet_bound_dev_eq(!!READ_ONCE(net->ipv4.sysctl_tcp_l3mdev_accept), bound_dev_if, dif, sdif); #else return inet_bound_dev_eq(true, bound_dev_if, dif, sdif); #endif } struct inet_cork { unsigned int flags; __be32 addr; struct ip_options *opt; unsigned int fragsize; int length; /* Total length of all frames */ struct dst_entry *dst; u8 tx_flags; __u8 ttl; __s16 tos; u32 priority; __u16 gso_size; u32 ts_opt_id; u64 transmit_time; u32 mark; }; struct inet_cork_full { struct inet_cork base; struct flowi fl; }; struct ip_mc_socklist; struct ipv6_pinfo; struct rtable; /** struct inet_sock - representation of INET sockets * * @sk - ancestor class * @pinet6 - pointer to IPv6 control block * @inet_daddr - Foreign IPv4 addr * @inet_rcv_saddr - Bound local IPv4 addr * @inet_dport - Destination port * @inet_num - Local port * @inet_flags - various atomic flags * @inet_saddr - Sending source * @uc_ttl - Unicast TTL * @inet_sport - Source port * @inet_id - ID counter for DF pkts * @tos - TOS * @mc_ttl - Multicasting TTL * @uc_index - Unicast outgoing device index * @mc_index - Multicast device index * @mc_list - Group array * @cork - info to build ip hdr on each ip frag while socket is corked */ struct inet_sock { /* sk and pinet6 has to be the first two members of inet_sock */ struct sock sk; #if IS_ENABLED(CONFIG_IPV6) struct ipv6_pinfo *pinet6; #endif /* Socket demultiplex comparisons on incoming packets. */ #define inet_daddr sk.__sk_common.skc_daddr #define inet_rcv_saddr sk.__sk_common.skc_rcv_saddr #define inet_dport sk.__sk_common.skc_dport #define inet_num sk.__sk_common.skc_num unsigned long inet_flags; __be32 inet_saddr; __s16 uc_ttl; __be16 inet_sport; struct ip_options_rcu __rcu *inet_opt; atomic_t inet_id; __u8 tos; __u8 min_ttl; __u8 mc_ttl; __u8 pmtudisc; __u8 rcv_tos; __u8 convert_csum; int uc_index; int mc_index; __be32 mc_addr; u32 local_port_range; /* high << 16 | low */ struct ip_mc_socklist __rcu *mc_list; struct inet_cork_full cork; }; #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ #define IPCORK_TS_OPT_ID 2 /* ts_opt_id field is valid, overriding sk_tskey */ enum { INET_FLAGS_PKTINFO = 0, INET_FLAGS_TTL = 1, INET_FLAGS_TOS = 2, INET_FLAGS_RECVOPTS = 3, INET_FLAGS_RETOPTS = 4, INET_FLAGS_PASSSEC = 5, INET_FLAGS_ORIGDSTADDR = 6, INET_FLAGS_CHECKSUM = 7, INET_FLAGS_RECVFRAGSIZE = 8, INET_FLAGS_RECVERR = 9, INET_FLAGS_RECVERR_RFC4884 = 10, INET_FLAGS_FREEBIND = 11, INET_FLAGS_HDRINCL = 12, INET_FLAGS_MC_LOOP = 13, INET_FLAGS_MC_ALL = 14, INET_FLAGS_TRANSPARENT = 15, INET_FLAGS_IS_ICSK = 16, INET_FLAGS_NODEFRAG = 17, INET_FLAGS_BIND_ADDRESS_NO_PORT = 18, INET_FLAGS_DEFER_CONNECT = 19, INET_FLAGS_MC6_LOOP = 20, INET_FLAGS_RECVERR6_RFC4884 = 21, INET_FLAGS_MC6_ALL = 22, INET_FLAGS_AUTOFLOWLABEL_SET = 23, INET_FLAGS_AUTOFLOWLABEL = 24, INET_FLAGS_DONTFRAG = 25, INET_FLAGS_RECVERR6 = 26, INET_FLAGS_REPFLOW = 27, INET_FLAGS_RTALERT_ISOLATE = 28, INET_FLAGS_SNDFLOW = 29, INET_FLAGS_RTALERT = 30, }; /* cmsg flags for inet */ #define IP_CMSG_PKTINFO BIT(INET_FLAGS_PKTINFO) #define IP_CMSG_TTL BIT(INET_FLAGS_TTL) #define IP_CMSG_TOS BIT(INET_FLAGS_TOS) #define IP_CMSG_RECVOPTS BIT(INET_FLAGS_RECVOPTS) #define IP_CMSG_RETOPTS BIT(INET_FLAGS_RETOPTS) #define IP_CMSG_PASSSEC BIT(INET_FLAGS_PASSSEC) #define IP_CMSG_ORIGDSTADDR BIT(INET_FLAGS_ORIGDSTADDR) #define IP_CMSG_CHECKSUM BIT(INET_FLAGS_CHECKSUM) #define IP_CMSG_RECVFRAGSIZE BIT(INET_FLAGS_RECVFRAGSIZE) #define IP_CMSG_ALL (IP_CMSG_PKTINFO | IP_CMSG_TTL | \ IP_CMSG_TOS | IP_CMSG_RECVOPTS | \ IP_CMSG_RETOPTS | IP_CMSG_PASSSEC | \ IP_CMSG_ORIGDSTADDR | IP_CMSG_CHECKSUM | \ IP_CMSG_RECVFRAGSIZE) static inline unsigned long inet_cmsg_flags(const struct inet_sock *inet) { return READ_ONCE(inet->inet_flags) & IP_CMSG_ALL; } static inline dscp_t inet_sk_dscp(const struct inet_sock *inet) { return inet_dsfield_to_dscp(READ_ONCE(inet->tos)); } #define inet_test_bit(nr, sk) \ test_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags) #define inet_set_bit(nr, sk) \ set_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags) #define inet_clear_bit(nr, sk) \ clear_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags) #define inet_assign_bit(nr, sk, val) \ assign_bit(INET_FLAGS_##nr, &inet_sk(sk)->inet_flags, val) /** * sk_to_full_sk - Access to a full socket * @sk: pointer to a socket * * SYNACK messages might be attached to request sockets. * Some places want to reach the listener in this case. */ static inline struct sock *sk_to_full_sk(struct sock *sk) { #ifdef CONFIG_INET if (sk && READ_ONCE(sk->sk_state) == TCP_NEW_SYN_RECV) sk = inet_reqsk(sk)->rsk_listener; if (sk && READ_ONCE(sk->sk_state) == TCP_TIME_WAIT) sk = NULL; #endif return sk; } /* sk_to_full_sk() variant with a const argument */ static inline const struct sock *sk_const_to_full_sk(const struct sock *sk) { #ifdef CONFIG_INET if (sk && READ_ONCE(sk->sk_state) == TCP_NEW_SYN_RECV) sk = ((const struct request_sock *)sk)->rsk_listener; if (sk && READ_ONCE(sk->sk_state) == TCP_TIME_WAIT) sk = NULL; #endif return sk; } static inline struct sock *skb_to_full_sk(const struct sk_buff *skb) { return sk_to_full_sk(skb->sk); } #define inet_sk(ptr) container_of_const(ptr, struct inet_sock, sk) static inline void __inet_sk_copy_descendant(struct sock *sk_to, const struct sock *sk_from, const int ancestor_size) { memcpy(inet_sk(sk_to) + 1, inet_sk(sk_from) + 1, sk_from->sk_prot->obj_size - ancestor_size); } int inet_sk_rebuild_header(struct sock *sk); /** * inet_sk_state_load - read sk->sk_state for lockless contexts * @sk: socket pointer * * Paired with inet_sk_state_store(). Used in places we don't hold socket lock: * tcp_diag_get_info(), tcp_get_info(), tcp_poll(), get_tcp4_sock() ... */ static inline int inet_sk_state_load(const struct sock *sk) { /* state change might impact lockless readers. */ return smp_load_acquire(&sk->sk_state); } /** * inet_sk_state_store - update sk->sk_state * @sk: socket pointer * @newstate: new state * * Paired with inet_sk_state_load(). Should be used in contexts where * state change might impact lockless readers. */ void inet_sk_state_store(struct sock *sk, int newstate); void inet_sk_set_state(struct sock *sk, int state); static inline unsigned int __inet_ehashfn(const __be32 laddr, const __u16 lport, const __be32 faddr, const __be16 fport, u32 initval) { return jhash_3words((__force __u32) laddr, (__force __u32) faddr, ((__u32) lport) << 16 | (__force __u32)fport, initval); } struct request_sock *inet_reqsk_alloc(const struct request_sock_ops *ops, struct sock *sk_listener, bool attach_listener); static inline __u8 inet_sk_flowi_flags(const struct sock *sk) { __u8 flags = 0; if (inet_test_bit(TRANSPARENT, sk) || inet_test_bit(HDRINCL, sk)) flags |= FLOWI_FLAG_ANYSRC; return flags; } static inline void inet_inc_convert_csum(struct sock *sk) { inet_sk(sk)->convert_csum++; } static inline void inet_dec_convert_csum(struct sock *sk) { if (inet_sk(sk)->convert_csum > 0) inet_sk(sk)->convert_csum--; } static inline bool inet_get_convert_csum(struct sock *sk) { return !!inet_sk(sk)->convert_csum; } static inline bool inet_can_nonlocal_bind(struct net *net, struct inet_sock *inet) { return READ_ONCE(net->ipv4.sysctl_ip_nonlocal_bind) || test_bit(INET_FLAGS_FREEBIND, &inet->inet_flags) || test_bit(INET_FLAGS_TRANSPARENT, &inet->inet_flags); } static inline bool inet_addr_valid_or_nonlocal(struct net *net, struct inet_sock *inet, __be32 addr, int addr_type) { return inet_can_nonlocal_bind(net, inet) || addr == htonl(INADDR_ANY) || addr_type == RTN_LOCAL || addr_type == RTN_MULTICAST || addr_type == RTN_BROADCAST; } #endif /* _INET_SOCK_H */ |
| 39 | 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 | /* * linux/include/linux/console.h * * Copyright (C) 1993 Hamish Macdonald * * 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. * * Changed: * 10-Mar-94: Arno Griffioen: Conversion for vt100 emulator port from PC LINUX */ #ifndef _LINUX_CONSOLE_H_ #define _LINUX_CONSOLE_H_ 1 #include <linux/atomic.h> #include <linux/bits.h> #include <linux/irq_work.h> #include <linux/rculist.h> #include <linux/rcuwait.h> #include <linux/types.h> #include <linux/vesa.h> struct vc_data; struct console_font_op; struct console_font; struct module; struct tty_struct; struct notifier_block; enum con_scroll { SM_UP, SM_DOWN, }; enum vc_intensity; /** * struct consw - callbacks for consoles * * @owner: the module to get references of when this console is used * @con_startup: set up the console and return its name (like VGA, EGA, ...) * @con_init: initialize the console on @vc. @init is true for the very first * call on this @vc. * @con_deinit: deinitialize the console from @vc. * @con_clear: erase @count characters at [@x, @y] on @vc. @count >= 1. * @con_putc: emit one character with attributes @ca to [@x, @y] on @vc. * (optional -- @con_putcs would be called instead) * @con_putcs: emit @count characters with attributes @s to [@x, @y] on @vc. * @con_cursor: enable/disable cursor depending on @enable * @con_scroll: move lines from @top to @bottom in direction @dir by @lines. * Return true if no generic handling should be done. * Invoked by csi_M and printing to the console. * @con_switch: notifier about the console switch; it is supposed to return * true if a redraw is needed. * @con_blank: blank/unblank the console. The target mode is passed in @blank. * @mode_switch is set if changing from/to text/graphics. The hook * is supposed to return true if a redraw is needed. * @con_font_set: set console @vc font to @font with height @vpitch. @flags can * be %KD_FONT_FLAG_DONT_RECALC. (optional) * @con_font_get: fetch the current font on @vc of height @vpitch into @font. * (optional) * @con_font_default: set default font on @vc. @name can be %NULL or font name * to search for. @font can be filled back. (optional) * @con_resize: resize the @vc console to @width x @height. @from_user is true * when this change comes from the user space. * @con_set_palette: sets the palette of the console @vc to @table (optional) * @con_scrolldelta: the contents of the console should be scrolled by @lines. * Invoked by user. (optional) * @con_set_origin: set origin (see &vc_data::vc_origin) of the @vc. If not * provided or returns false, the origin is set to * @vc->vc_screenbuf. (optional) * @con_save_screen: save screen content into @vc->vc_screenbuf. Called e.g. * upon entering graphics. (optional) * @con_build_attr: build attributes based on @color, @intensity and other * parameters. The result is used for both normal and erase * characters. (optional) * @con_invert_region: invert a region of length @count on @vc starting at @p. * (optional) * @con_debug_enter: prepare the console for the debugger. This includes, but * is not limited to, unblanking the console, loading an * appropriate palette, and allowing debugger generated output. * (optional) * @con_debug_leave: restore the console to its pre-debug state as closely as * possible. (optional) */ struct consw { struct module *owner; const char *(*con_startup)(void); void (*con_init)(struct vc_data *vc, bool init); void (*con_deinit)(struct vc_data *vc); void (*con_clear)(struct vc_data *vc, unsigned int y, unsigned int x, unsigned int count); void (*con_putc)(struct vc_data *vc, u16 ca, unsigned int y, unsigned int x); void (*con_putcs)(struct vc_data *vc, const u16 *s, unsigned int count, unsigned int ypos, unsigned int xpos); void (*con_cursor)(struct vc_data *vc, bool enable); bool (*con_scroll)(struct vc_data *vc, unsigned int top, unsigned int bottom, enum con_scroll dir, unsigned int lines); bool (*con_switch)(struct vc_data *vc); bool (*con_blank)(struct vc_data *vc, enum vesa_blank_mode blank, bool mode_switch); int (*con_font_set)(struct vc_data *vc, const struct console_font *font, unsigned int vpitch, unsigned int flags); int (*con_font_get)(struct vc_data *vc, struct console_font *font, unsigned int vpitch); int (*con_font_default)(struct vc_data *vc, struct console_font *font, const char *name); int (*con_resize)(struct vc_data *vc, unsigned int width, unsigned int height, bool from_user); void (*con_set_palette)(struct vc_data *vc, const unsigned char *table); void (*con_scrolldelta)(struct vc_data *vc, int lines); bool (*con_set_origin)(struct vc_data *vc); void (*con_save_screen)(struct vc_data *vc); u8 (*con_build_attr)(struct vc_data *vc, u8 color, enum vc_intensity intensity, bool blink, bool underline, bool reverse, bool italic); void (*con_invert_region)(struct vc_data *vc, u16 *p, int count); void (*con_debug_enter)(struct vc_data *vc); void (*con_debug_leave)(struct vc_data *vc); }; extern const struct consw *conswitchp; extern const struct consw dummy_con; /* dummy console buffer */ extern const struct consw vga_con; /* VGA text console */ extern const struct consw newport_con; /* SGI Newport console */ struct screen_info; #ifdef CONFIG_VGA_CONSOLE void vgacon_register_screen(struct screen_info *si); #else static inline void vgacon_register_screen(struct screen_info *si) { } #endif int con_is_bound(const struct consw *csw); int do_unregister_con_driver(const struct consw *csw); int do_take_over_console(const struct consw *sw, int first, int last, int deflt); void give_up_console(const struct consw *sw); #ifdef CONFIG_VT void con_debug_enter(struct vc_data *vc); void con_debug_leave(void); #else static inline void con_debug_enter(struct vc_data *vc) { } static inline void con_debug_leave(void) { } #endif /* * The interface for a console, or any other device that wants to capture * console messages (printer driver?) */ /** * enum cons_flags - General console flags * @CON_PRINTBUFFER: Used by newly registered consoles to avoid duplicate * output of messages that were already shown by boot * consoles or read by userspace via syslog() syscall. * @CON_CONSDEV: Indicates that the console driver is backing * /dev/console. * @CON_ENABLED: Indicates if a console is allowed to print records. If * false, the console also will not advance to later * records. * @CON_BOOT: Marks the console driver as early console driver which * is used during boot before the real driver becomes * available. It will be automatically unregistered * when the real console driver is registered unless * "keep_bootcon" parameter is used. * @CON_ANYTIME: A misnomed historical flag which tells the core code * that the legacy @console::write callback can be invoked * on a CPU which is marked OFFLINE. That is misleading as * it suggests that there is no contextual limit for * invoking the callback. The original motivation was * readiness of the per-CPU areas. * @CON_BRL: Indicates a braille device which is exempt from * receiving the printk spam for obvious reasons. * @CON_EXTENDED: The console supports the extended output format of * /dev/kmesg which requires a larger output buffer. * @CON_SUSPENDED: Indicates if a console is suspended. If true, the * printing callbacks must not be called. * @CON_NBCON: Console can operate outside of the legacy style console_lock * constraints. */ enum cons_flags { CON_PRINTBUFFER = BIT(0), CON_CONSDEV = BIT(1), CON_ENABLED = BIT(2), CON_BOOT = BIT(3), CON_ANYTIME = BIT(4), CON_BRL = BIT(5), CON_EXTENDED = BIT(6), CON_SUSPENDED = BIT(7), CON_NBCON = BIT(8), }; /** * struct nbcon_state - console state for nbcon consoles * @atom: Compound of the state fields for atomic operations * * @req_prio: The priority of a handover request * @prio: The priority of the current owner * @unsafe: Console is busy in a non takeover region * @unsafe_takeover: A hostile takeover in an unsafe state happened in the * past. The console cannot be safe until re-initialized. * @cpu: The CPU on which the owner runs * * To be used for reading and preparing of the value stored in the nbcon * state variable @console::nbcon_state. * * The @prio and @req_prio fields are particularly important to allow * spin-waiting to timeout and give up without the risk of a waiter being * assigned the lock after giving up. */ struct nbcon_state { union { unsigned int atom; struct { unsigned int prio : 2; unsigned int req_prio : 2; unsigned int unsafe : 1; unsigned int unsafe_takeover : 1; unsigned int cpu : 24; }; }; }; /* * The nbcon_state struct is used to easily create and interpret values that * are stored in the @console::nbcon_state variable. Ensure this struct stays * within the size boundaries of the atomic variable's underlying type in * order to avoid any accidental truncation. */ static_assert(sizeof(struct nbcon_state) <= sizeof(int)); /** * enum nbcon_prio - console owner priority for nbcon consoles * @NBCON_PRIO_NONE: Unused * @NBCON_PRIO_NORMAL: Normal (non-emergency) usage * @NBCON_PRIO_EMERGENCY: Emergency output (WARN/OOPS...) * @NBCON_PRIO_PANIC: Panic output * @NBCON_PRIO_MAX: The number of priority levels * * A higher priority context can takeover the console when it is * in the safe state. The final attempt to flush consoles in panic() * can be allowed to do so even in an unsafe state (Hope and pray). */ enum nbcon_prio { NBCON_PRIO_NONE = 0, NBCON_PRIO_NORMAL, NBCON_PRIO_EMERGENCY, NBCON_PRIO_PANIC, NBCON_PRIO_MAX, }; struct console; struct printk_buffers; /** * struct nbcon_context - Context for console acquire/release * @console: The associated console * @spinwait_max_us: Limit for spin-wait acquire * @prio: Priority of the context * @allow_unsafe_takeover: Allow performing takeover even if unsafe. Can * be used only with NBCON_PRIO_PANIC @prio. It * might cause a system freeze when the console * is used later. * @backlog: Ringbuffer has pending records * @pbufs: Pointer to the text buffer for this context * @seq: The sequence number to print for this context */ struct nbcon_context { /* members set by caller */ struct console *console; unsigned int spinwait_max_us; enum nbcon_prio prio; unsigned int allow_unsafe_takeover : 1; /* members set by emit */ unsigned int backlog : 1; /* members set by acquire */ struct printk_buffers *pbufs; u64 seq; }; /** * struct nbcon_write_context - Context handed to the nbcon write callbacks * @ctxt: The core console context * @outbuf: Pointer to the text buffer for output * @len: Length to write * @unsafe_takeover: If a hostile takeover in an unsafe state has occurred */ struct nbcon_write_context { struct nbcon_context __private ctxt; char *outbuf; unsigned int len; bool unsafe_takeover; }; /** * struct console - The console descriptor structure * @name: The name of the console driver * @write: Legacy write callback to output messages (Optional) * @read: Read callback for console input (Optional) * @device: The underlying TTY device driver (Optional) * @unblank: Callback to unblank the console (Optional) * @setup: Callback for initializing the console (Optional) * @exit: Callback for teardown of the console (Optional) * @match: Callback for matching a console (Optional) * @flags: Console flags. See enum cons_flags * @index: Console index, e.g. port number * @cflag: TTY control mode flags * @ispeed: TTY input speed * @ospeed: TTY output speed * @seq: Sequence number of the next ringbuffer record to print * @dropped: Number of unreported dropped ringbuffer records * @data: Driver private data * @node: hlist node for the console list * * @nbcon_state: State for nbcon consoles * @nbcon_seq: Sequence number of the next record for nbcon to print * @nbcon_device_ctxt: Context available for non-printing operations * @nbcon_prev_seq: Seq num the previous nbcon owner was assigned to print * @pbufs: Pointer to nbcon private buffer * @kthread: Printer kthread for this console * @rcuwait: RCU-safe wait object for @kthread waking * @irq_work: Defer @kthread waking to IRQ work context */ struct console { char name[16]; void (*write)(struct console *co, const char *s, unsigned int count); int (*read)(struct console *co, char *s, unsigned int count); struct tty_driver *(*device)(struct console *co, int *index); void (*unblank)(void); int (*setup)(struct console *co, char *options); int (*exit)(struct console *co); int (*match)(struct console *co, char *name, int idx, char *options); short flags; short index; int cflag; uint ispeed; uint ospeed; u64 seq; unsigned long dropped; void *data; struct hlist_node node; /* nbcon console specific members */ /** * @write_atomic: * * NBCON callback to write out text in any context. (Optional) * * This callback is called with the console already acquired. However, * a higher priority context is allowed to take it over by default. * * The callback must call nbcon_enter_unsafe() and nbcon_exit_unsafe() * around any code where the takeover is not safe, for example, when * manipulating the serial port registers. * * nbcon_enter_unsafe() will fail if the context has lost the console * ownership in the meantime. In this case, the callback is no longer * allowed to go forward. It must back out immediately and carefully. * The buffer content is also no longer trusted since it no longer * belongs to the context. * * The callback should allow the takeover whenever it is safe. It * increases the chance to see messages when the system is in trouble. * If the driver must reacquire ownership in order to finalize or * revert hardware changes, nbcon_reacquire_nobuf() can be used. * However, on reacquire the buffer content is no longer available. A * reacquire cannot be used to resume printing. * * The callback can be called from any context (including NMI). * Therefore it must avoid usage of any locking and instead rely * on the console ownership for synchronization. */ void (*write_atomic)(struct console *con, struct nbcon_write_context *wctxt); /** * @write_thread: * * NBCON callback to write out text in task context. * * This callback must be called only in task context with both * device_lock() and the nbcon console acquired with * NBCON_PRIO_NORMAL. * * The same rules for console ownership verification and unsafe * sections handling applies as with write_atomic(). * * The console ownership handling is necessary for synchronization * against write_atomic() which is synchronized only via the context. * * The device_lock() provides the primary serialization for operations * on the device. It might be as relaxed (mutex)[*] or as tight * (disabled preemption and interrupts) as needed. It allows * the kthread to operate in the least restrictive mode[**]. * * [*] Standalone nbcon_context_try_acquire() is not safe with * the preemption enabled, see nbcon_owner_matches(). But it * can be safe when always called in the preemptive context * under the device_lock(). * * [**] The device_lock() makes sure that nbcon_context_try_acquire() * would never need to spin which is important especially with * PREEMPT_RT. */ void (*write_thread)(struct console *con, struct nbcon_write_context *wctxt); /** * @device_lock: * * NBCON callback to begin synchronization with driver code. * * Console drivers typically must deal with access to the hardware * via user input/output (such as an interactive login shell) and * output of kernel messages via printk() calls. This callback is * called by the printk-subsystem whenever it needs to synchronize * with hardware access by the driver. It should be implemented to * use whatever synchronization mechanism the driver is using for * itself (for example, the port lock for uart serial consoles). * * The callback is always called from task context. It may use any * synchronization method required by the driver. * * IMPORTANT: The callback MUST disable migration. The console driver * may be using a synchronization mechanism that already takes * care of this (such as spinlocks). Otherwise this function must * explicitly call migrate_disable(). * * The flags argument is provided as a convenience to the driver. It * will be passed again to device_unlock(). It can be ignored if the * driver does not need it. */ void (*device_lock)(struct console *con, unsigned long *flags); /** * @device_unlock: * * NBCON callback to finish synchronization with driver code. * * It is the counterpart to device_lock(). * * This callback is always called from task context. It must * appropriately re-enable migration (depending on how device_lock() * disabled migration). * * The flags argument is the value of the same variable that was * passed to device_lock(). */ void (*device_unlock)(struct console *con, unsigned long flags); atomic_t __private nbcon_state; atomic_long_t __private nbcon_seq; struct nbcon_context __private nbcon_device_ctxt; atomic_long_t __private nbcon_prev_seq; struct printk_buffers *pbufs; struct task_struct *kthread; struct rcuwait rcuwait; struct irq_work irq_work; }; #ifdef CONFIG_LOCKDEP extern void lockdep_assert_console_list_lock_held(void); #else static inline void lockdep_assert_console_list_lock_held(void) { } #endif #ifdef CONFIG_DEBUG_LOCK_ALLOC extern bool console_srcu_read_lock_is_held(void); #else static inline bool console_srcu_read_lock_is_held(void) { return 1; } #endif extern int console_srcu_read_lock(void); extern void console_srcu_read_unlock(int cookie); extern void console_list_lock(void) __acquires(console_mutex); extern void console_list_unlock(void) __releases(console_mutex); extern struct hlist_head console_list; /** * console_srcu_read_flags - Locklessly read flags of a possibly registered * console * @con: struct console pointer of console to read flags from * * Locklessly reading @con->flags provides a consistent read value because * there is at most one CPU modifying @con->flags and that CPU is using only * read-modify-write operations to do so. * * Requires console_srcu_read_lock to be held, which implies that @con might * be a registered console. The purpose of holding console_srcu_read_lock is * to guarantee that the console state is valid (CON_SUSPENDED/CON_ENABLED) * and that no exit/cleanup routines will run if the console is currently * undergoing unregistration. * * If the caller is holding the console_list_lock or it is _certain_ that * @con is not and will not become registered, the caller may read * @con->flags directly instead. * * Context: Any context. * Return: The current value of the @con->flags field. */ static inline short console_srcu_read_flags(const struct console *con) { WARN_ON_ONCE(!console_srcu_read_lock_is_held()); /* * The READ_ONCE() matches the WRITE_ONCE() when @flags are modified * for registered consoles with console_srcu_write_flags(). */ return data_race(READ_ONCE(con->flags)); } /** * console_srcu_write_flags - Write flags for a registered console * @con: struct console pointer of console to write flags to * @flags: new flags value to write * * Only use this function to write flags for registered consoles. It * requires holding the console_list_lock. * * Context: Any context. */ static inline void console_srcu_write_flags(struct console *con, short flags) { lockdep_assert_console_list_lock_held(); /* This matches the READ_ONCE() in console_srcu_read_flags(). */ WRITE_ONCE(con->flags, flags); } /* Variant of console_is_registered() when the console_list_lock is held. */ static inline bool console_is_registered_locked(const struct console *con) { lockdep_assert_console_list_lock_held(); return !hlist_unhashed(&con->node); } /* * console_is_registered - Check if the console is registered * @con: struct console pointer of console to check * * Context: Process context. May sleep while acquiring console list lock. * Return: true if the console is in the console list, otherwise false. * * If false is returned for a console that was previously registered, it * can be assumed that the console's unregistration is fully completed, * including the exit() callback after console list removal. */ static inline bool console_is_registered(const struct console *con) { bool ret; console_list_lock(); ret = console_is_registered_locked(con); console_list_unlock(); return ret; } /** * for_each_console_srcu() - Iterator over registered consoles * @con: struct console pointer used as loop cursor * * Although SRCU guarantees the console list will be consistent, the * struct console fields may be updated by other CPUs while iterating. * * Requires console_srcu_read_lock to be held. Can be invoked from * any context. */ #define for_each_console_srcu(con) \ hlist_for_each_entry_srcu(con, &console_list, node, \ console_srcu_read_lock_is_held()) /** * for_each_console() - Iterator over registered consoles * @con: struct console pointer used as loop cursor * * The console list and the &console.flags are immutable while iterating. * * Requires console_list_lock to be held. */ #define for_each_console(con) \ lockdep_assert_console_list_lock_held(); \ hlist_for_each_entry(con, &console_list, node) #ifdef CONFIG_PRINTK extern void nbcon_cpu_emergency_enter(void); extern void nbcon_cpu_emergency_exit(void); extern bool nbcon_can_proceed(struct nbcon_write_context *wctxt); extern bool nbcon_enter_unsafe(struct nbcon_write_context *wctxt); extern bool nbcon_exit_unsafe(struct nbcon_write_context *wctxt); extern void nbcon_reacquire_nobuf(struct nbcon_write_context *wctxt); #else static inline void nbcon_cpu_emergency_enter(void) { } static inline void nbcon_cpu_emergency_exit(void) { } static inline bool nbcon_can_proceed(struct nbcon_write_context *wctxt) { return false; } static inline bool nbcon_enter_unsafe(struct nbcon_write_context *wctxt) { return false; } static inline bool nbcon_exit_unsafe(struct nbcon_write_context *wctxt) { return false; } static inline void nbcon_reacquire_nobuf(struct nbcon_write_context *wctxt) { } #endif extern int console_set_on_cmdline; extern struct console *early_console; enum con_flush_mode { CONSOLE_FLUSH_PENDING, CONSOLE_REPLAY_ALL, }; extern int add_preferred_console(const char *name, const short idx, char *options); extern void console_force_preferred_locked(struct console *con); extern void register_console(struct console *); extern int unregister_console(struct console *); extern void console_lock(void); extern int console_trylock(void); extern void console_unlock(void); extern void console_conditional_schedule(void); extern void console_unblank(void); extern void console_flush_on_panic(enum con_flush_mode mode); extern struct tty_driver *console_device(int *); extern void console_suspend(struct console *); extern void console_resume(struct console *); extern int is_console_locked(void); extern int braille_register_console(struct console *, int index, char *console_options, char *braille_options); extern int braille_unregister_console(struct console *); #ifdef CONFIG_TTY extern void console_sysfs_notify(void); #else static inline void console_sysfs_notify(void) { } #endif extern bool console_suspend_enabled; /* Suspend and resume console messages over PM events */ extern void console_suspend_all(void); extern void console_resume_all(void); int mda_console_init(void); void vcs_make_sysfs(int index); void vcs_remove_sysfs(int index); /* Some debug stub to catch some of the obvious races in the VT code */ #define WARN_CONSOLE_UNLOCKED() \ WARN_ON(!atomic_read(&ignore_console_lock_warning) && \ !is_console_locked() && !oops_in_progress) /* * Increment ignore_console_lock_warning if you need to quiet * WARN_CONSOLE_UNLOCKED() for debugging purposes. */ extern atomic_t ignore_console_lock_warning; DEFINE_LOCK_GUARD_0(console_lock, console_lock(), console_unlock()); extern void console_init(void); /* For deferred console takeover */ void dummycon_register_output_notifier(struct notifier_block *nb); void dummycon_unregister_output_notifier(struct notifier_block *nb); #endif /* _LINUX_CONSOLE_H */ |
| 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 | /* SPDX-License-Identifier: GPL-2.0 */ /* Copyright 2011-2014 Autronica Fire and Security AS * * Author(s): * 2011-2014 Arvid Brodin, arvid.brodin@alten.se * * include file for HSR and PRP. */ #ifndef __HSR_PRIVATE_H #define __HSR_PRIVATE_H #include <linux/netdevice.h> #include <linux/list.h> #include <linux/if_vlan.h> #include <linux/if_hsr.h> /* Time constants as specified in the HSR specification (IEC-62439-3 2010) * Table 8. * All values in milliseconds. */ #define HSR_LIFE_CHECK_INTERVAL 2000 /* ms */ #define HSR_NODE_FORGET_TIME 60000 /* ms */ #define HSR_PROXY_NODE_FORGET_TIME 60000 /* ms */ #define HSR_ANNOUNCE_INTERVAL 100 /* ms */ #define HSR_ENTRY_FORGET_TIME 400 /* ms */ /* By how much may slave1 and slave2 timestamps of latest received frame from * each node differ before we notify of communication problem? */ #define MAX_SLAVE_DIFF 3000 /* ms */ #define HSR_SEQNR_START (USHRT_MAX - 1024) #define HSR_SUP_SEQNR_START (HSR_SEQNR_START / 2) /* How often shall we check for broken ring and remove node entries older than * HSR_NODE_FORGET_TIME? */ #define PRUNE_PERIOD 3000 /* ms */ #define PRUNE_PROXY_PERIOD 3000 /* ms */ #define HSR_TLV_EOT 0 /* End of TLVs */ #define HSR_TLV_ANNOUNCE 22 #define HSR_TLV_LIFE_CHECK 23 /* PRP V1 life check for Duplicate discard */ #define PRP_TLV_LIFE_CHECK_DD 20 /* PRP V1 life check for Duplicate Accept */ #define PRP_TLV_LIFE_CHECK_DA 21 /* PRP V1 life redundancy box MAC address */ #define PRP_TLV_REDBOX_MAC 30 #define HSR_V1_SUP_LSDUSIZE 52 /* The helper functions below assumes that 'path' occupies the 4 most * significant bits of the 16-bit field shared by 'path' and 'LSDU_size' (or * equivalently, the 4 most significant bits of HSR tag byte 14). * * This is unclear in the IEC specification; its definition of MAC addresses * indicates the spec is written with the least significant bit first (to the * left). This, however, would mean that the LSDU field would be split in two * with the path field in-between, which seems strange. I'm guessing the MAC * address definition is in error. */ static inline void set_hsr_tag_path(struct hsr_tag *ht, u16 path) { ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) & 0x0FFF) | (path << 12)); } static inline void set_hsr_tag_LSDU_size(struct hsr_tag *ht, u16 LSDU_size) { ht->path_and_LSDU_size = htons((ntohs(ht->path_and_LSDU_size) & 0xF000) | (LSDU_size & 0x0FFF)); } struct hsr_ethhdr { struct ethhdr ethhdr; struct hsr_tag hsr_tag; } __packed; struct hsr_vlan_ethhdr { struct vlan_ethhdr vlanhdr; struct hsr_tag hsr_tag; } __packed; struct hsr_sup_tlv { u8 HSR_TLV_type; u8 HSR_TLV_length; } __packed; /* HSR/PRP Supervision Frame data types. * Field names as defined in the IEC:2010 standard for HSR. */ struct hsr_sup_tag { __be16 path_and_HSR_ver; __be16 sequence_nr; struct hsr_sup_tlv tlv; } __packed; struct hsr_sup_payload { unsigned char macaddress_A[ETH_ALEN]; } __packed; static inline void set_hsr_stag_path(struct hsr_sup_tag *hst, u16 path) { set_hsr_tag_path((struct hsr_tag *)hst, path); } static inline void set_hsr_stag_HSR_ver(struct hsr_sup_tag *hst, u16 HSR_ver) { set_hsr_tag_LSDU_size((struct hsr_tag *)hst, HSR_ver); } struct hsrv0_ethhdr_sp { struct ethhdr ethhdr; struct hsr_sup_tag hsr_sup; } __packed; struct hsrv1_ethhdr_sp { struct ethhdr ethhdr; struct hsr_tag hsr; struct hsr_sup_tag hsr_sup; } __packed; /* PRP Redunancy Control Trailor (RCT). * As defined in IEC-62439-4:2012, the PRP RCT is really { sequence Nr, * Lan indentifier (LanId), LSDU_size and PRP_suffix = 0x88FB }. * * Field names as defined in the IEC:2012 standard for PRP. */ struct prp_rct { __be16 sequence_nr; __be16 lan_id_and_LSDU_size; __be16 PRP_suffix; } __packed; static inline u16 get_prp_LSDU_size(struct prp_rct *rct) { return ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF; } static inline void set_prp_lan_id(struct prp_rct *rct, u16 lan_id) { rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) & 0x0FFF) | (lan_id << 12)); } static inline void set_prp_LSDU_size(struct prp_rct *rct, u16 LSDU_size) { rct->lan_id_and_LSDU_size = htons((ntohs(rct->lan_id_and_LSDU_size) & 0xF000) | (LSDU_size & 0x0FFF)); } struct hsr_port { struct list_head port_list; struct net_device *dev; struct hsr_priv *hsr; enum hsr_port_type type; struct rcu_head rcu; unsigned char original_macaddress[ETH_ALEN]; }; struct hsr_frame_info; struct hsr_node; struct hsr_proto_ops { /* format and send supervision frame */ void (*send_sv_frame)(struct hsr_port *port, unsigned long *interval, const unsigned char addr[ETH_ALEN]); void (*handle_san_frame)(bool san, enum hsr_port_type port, struct hsr_node *node); bool (*drop_frame)(struct hsr_frame_info *frame, struct hsr_port *port); struct sk_buff * (*get_untagged_frame)(struct hsr_frame_info *frame, struct hsr_port *port); struct sk_buff * (*create_tagged_frame)(struct hsr_frame_info *frame, struct hsr_port *port); int (*fill_frame_info)(__be16 proto, struct sk_buff *skb, struct hsr_frame_info *frame); bool (*invalid_dan_ingress_frame)(__be16 protocol); void (*update_san_info)(struct hsr_node *node, bool is_sup); int (*register_frame_out)(struct hsr_port *port, struct hsr_frame_info *frame); }; struct hsr_self_node { unsigned char macaddress_A[ETH_ALEN]; unsigned char macaddress_B[ETH_ALEN]; struct rcu_head rcu_head; }; struct hsr_priv { struct rcu_head rcu_head; struct list_head ports; struct list_head node_db; /* Known HSR nodes */ struct list_head proxy_node_db; /* RedBox HSR proxy nodes */ struct hsr_self_node __rcu *self_node; /* MACs of slaves */ struct timer_list announce_timer; /* Supervision frame dispatch */ struct timer_list announce_proxy_timer; struct timer_list prune_timer; struct timer_list prune_proxy_timer; int announce_count; u16 sequence_nr; u16 sup_sequence_nr; /* For HSRv1 separate seq_nr for supervision */ enum hsr_version prot_version; /* Indicate if HSRv0, HSRv1 or PRPv1 */ spinlock_t seqnr_lock; /* locking for sequence_nr */ spinlock_t list_lock; /* locking for node list */ struct hsr_proto_ops *proto_ops; #define PRP_LAN_ID 0x5 /* 0x1010 for A and 0x1011 for B. Bit 0 is set * based on SLAVE_A or SLAVE_B */ u8 net_id; /* for PRP, it occupies most significant 3 bits * of lan_id */ bool fwd_offloaded; /* Forwarding offloaded to HW */ bool redbox; /* Device supports HSR RedBox */ unsigned char macaddress_redbox[ETH_ALEN]; unsigned char sup_multicast_addr[ETH_ALEN] __aligned(sizeof(u16)); /* Align to u16 boundary to avoid unaligned access * in ether_addr_equal */ #ifdef CONFIG_DEBUG_FS struct dentry *node_tbl_root; #endif }; #define hsr_for_each_port(hsr, port) \ list_for_each_entry_rcu((port), &(hsr)->ports, port_list) #define hsr_for_each_port_rtnl(hsr, port) \ list_for_each_entry_rcu((port), &(hsr)->ports, port_list, lockdep_rtnl_is_held()) struct hsr_port *hsr_port_get_hsr(struct hsr_priv *hsr, enum hsr_port_type pt); /* Caller must ensure skb is a valid HSR frame */ static inline u16 hsr_get_skb_sequence_nr(struct sk_buff *skb) { struct hsr_ethhdr *hsr_ethhdr; hsr_ethhdr = (struct hsr_ethhdr *)skb_mac_header(skb); return ntohs(hsr_ethhdr->hsr_tag.sequence_nr); } static inline struct prp_rct *skb_get_PRP_rct(struct sk_buff *skb) { unsigned char *tail = skb_tail_pointer(skb) - HSR_HLEN; struct prp_rct *rct = (struct prp_rct *)tail; if (rct->PRP_suffix == htons(ETH_P_PRP)) return rct; return NULL; } /* Assume caller has confirmed this skb is PRP suffixed */ static inline u16 prp_get_skb_sequence_nr(struct prp_rct *rct) { return ntohs(rct->sequence_nr); } /* assume there is a valid rct */ static inline bool prp_check_lsdu_size(struct sk_buff *skb, struct prp_rct *rct, bool is_sup) { struct ethhdr *ethhdr; int expected_lsdu_size; if (is_sup) { expected_lsdu_size = HSR_V1_SUP_LSDUSIZE; } else { ethhdr = (struct ethhdr *)skb_mac_header(skb); expected_lsdu_size = skb->len - 14; if (ethhdr->h_proto == htons(ETH_P_8021Q)) expected_lsdu_size -= 4; } return (expected_lsdu_size == get_prp_LSDU_size(rct)); } #if IS_ENABLED(CONFIG_DEBUG_FS) void hsr_debugfs_rename(struct net_device *dev); void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev); void hsr_debugfs_term(struct hsr_priv *priv); void hsr_debugfs_create_root(void); void hsr_debugfs_remove_root(void); #else static inline void hsr_debugfs_rename(struct net_device *dev) { } static inline void hsr_debugfs_init(struct hsr_priv *priv, struct net_device *hsr_dev) {} static inline void hsr_debugfs_term(struct hsr_priv *priv) {} static inline void hsr_debugfs_create_root(void) {} static inline void hsr_debugfs_remove_root(void) {} #endif #endif /* __HSR_PRIVATE_H */ |
| 4 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 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_PAGE_COUNTER_H #define _LINUX_PAGE_COUNTER_H #include <linux/atomic.h> #include <linux/cache.h> #include <linux/limits.h> #include <asm/page.h> struct page_counter { /* * Make sure 'usage' does not share cacheline with any other field in * v2. The memcg->memory.usage is a hot member of struct mem_cgroup. */ atomic_long_t usage; unsigned long failcnt; /* v1-only field */ CACHELINE_PADDING(_pad1_); /* effective memory.min and memory.min usage tracking */ unsigned long emin; atomic_long_t min_usage; atomic_long_t children_min_usage; /* effective memory.low and memory.low usage tracking */ unsigned long elow; atomic_long_t low_usage; atomic_long_t children_low_usage; unsigned long watermark; /* Latest cg2 reset watermark */ unsigned long local_watermark; /* Keep all the read most fields in a separete cacheline. */ CACHELINE_PADDING(_pad2_); bool protection_support; bool track_failcnt; unsigned long min; unsigned long low; unsigned long high; unsigned long max; struct page_counter *parent; } ____cacheline_internodealigned_in_smp; #if BITS_PER_LONG == 32 #define PAGE_COUNTER_MAX LONG_MAX #else #define PAGE_COUNTER_MAX (LONG_MAX / PAGE_SIZE) #endif /* * Protection is supported only for the first counter (with id 0). */ static inline void page_counter_init(struct page_counter *counter, struct page_counter *parent, bool protection_support) { counter->usage = (atomic_long_t)ATOMIC_LONG_INIT(0); counter->max = PAGE_COUNTER_MAX; counter->parent = parent; counter->protection_support = protection_support; counter->track_failcnt = false; } static inline unsigned long page_counter_read(struct page_counter *counter) { return atomic_long_read(&counter->usage); } void page_counter_cancel(struct page_counter *counter, unsigned long nr_pages); void page_counter_charge(struct page_counter *counter, unsigned long nr_pages); bool page_counter_try_charge(struct page_counter *counter, unsigned long nr_pages, struct page_counter **fail); void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages); void page_counter_set_min(struct page_counter *counter, unsigned long nr_pages); void page_counter_set_low(struct page_counter *counter, unsigned long nr_pages); static inline void page_counter_set_high(struct page_counter *counter, unsigned long nr_pages) { WRITE_ONCE(counter->high, nr_pages); } int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages); int page_counter_memparse(const char *buf, const char *max, unsigned long *nr_pages); static inline void page_counter_reset_watermark(struct page_counter *counter) { unsigned long usage = page_counter_read(counter); /* * Update local_watermark first, so it's always <= watermark * (modulo CPU/compiler re-ordering) */ counter->local_watermark = usage; counter->watermark = usage; } #if IS_ENABLED(CONFIG_MEMCG) || IS_ENABLED(CONFIG_CGROUP_DMEM) void page_counter_calculate_protection(struct page_counter *root, struct page_counter *counter, bool recursive_protection); #else static inline void page_counter_calculate_protection(struct page_counter *root, struct page_counter *counter, bool recursive_protection) {} #endif #endif /* _LINUX_PAGE_COUNTER_H */ |
| 8 8 1 1 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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) */ #include <linux/errno.h> #include <linux/types.h> #include <linux/socket.h> #include <linux/slab.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/spinlock.h> #include <net/ax25.h> #include <linux/inet.h> #include <linux/netdevice.h> #include <linux/if_arp.h> #include <linux/skbuff.h> #include <net/sock.h> #include <linux/uaccess.h> #include <linux/fcntl.h> #include <linux/list.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/init.h> static LIST_HEAD(ax25_dev_list); DEFINE_SPINLOCK(ax25_dev_lock); ax25_dev *ax25_addr_ax25dev(ax25_address *addr) { ax25_dev *ax25_dev, *res = NULL; spin_lock_bh(&ax25_dev_lock); list_for_each_entry(ax25_dev, &ax25_dev_list, list) if (ax25cmp(addr, (const ax25_address *)ax25_dev->dev->dev_addr) == 0) { res = ax25_dev; ax25_dev_hold(ax25_dev); break; } spin_unlock_bh(&ax25_dev_lock); return res; } /* * This is called when an interface is brought up. These are * reasonable defaults. */ void ax25_dev_device_up(struct net_device *dev) { ax25_dev *ax25_dev; ax25_dev = kzalloc(sizeof(*ax25_dev), GFP_KERNEL); if (!ax25_dev) { printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n"); return; } refcount_set(&ax25_dev->refcount, 1); ax25_dev->dev = dev; netdev_hold(dev, &ax25_dev->dev_tracker, GFP_KERNEL); ax25_dev->forward = NULL; ax25_dev->device_up = true; ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE; ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE; ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF; ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE; ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW; ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW; ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1; ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2; ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3; ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE; ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2; ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN; ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL; #ifdef CONFIG_AX25_DAMA_SLAVE ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT; #endif #if defined(CONFIG_AX25_DAMA_SLAVE) || defined(CONFIG_AX25_DAMA_MASTER) ax25_ds_setup_timer(ax25_dev); #endif spin_lock_bh(&ax25_dev_lock); list_add(&ax25_dev->list, &ax25_dev_list); rcu_assign_pointer(dev->ax25_ptr, ax25_dev); spin_unlock_bh(&ax25_dev_lock); ax25_register_dev_sysctl(ax25_dev); } void ax25_dev_device_down(struct net_device *dev) { ax25_dev *s, *ax25_dev; if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) return; ax25_unregister_dev_sysctl(ax25_dev); spin_lock_bh(&ax25_dev_lock); #ifdef CONFIG_AX25_DAMA_SLAVE timer_shutdown_sync(&ax25_dev->dama.slave_timer); #endif /* * Remove any packet forwarding that points to this device. */ list_for_each_entry(s, &ax25_dev_list, list) if (s->forward == dev) s->forward = NULL; list_for_each_entry(s, &ax25_dev_list, list) { if (s == ax25_dev) { list_del(&s->list); break; } } RCU_INIT_POINTER(dev->ax25_ptr, NULL); spin_unlock_bh(&ax25_dev_lock); netdev_put(dev, &ax25_dev->dev_tracker); ax25_dev_put(ax25_dev); } int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd) { ax25_dev *ax25_dev, *fwd_dev; if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL) return -EINVAL; switch (cmd) { case SIOCAX25ADDFWD: fwd_dev = ax25_addr_ax25dev(&fwd->port_to); if (!fwd_dev) { ax25_dev_put(ax25_dev); return -EINVAL; } if (ax25_dev->forward) { ax25_dev_put(fwd_dev); ax25_dev_put(ax25_dev); return -EINVAL; } ax25_dev->forward = fwd_dev->dev; ax25_dev_put(fwd_dev); ax25_dev_put(ax25_dev); break; case SIOCAX25DELFWD: if (!ax25_dev->forward) { ax25_dev_put(ax25_dev); return -EINVAL; } ax25_dev->forward = NULL; ax25_dev_put(ax25_dev); break; default: ax25_dev_put(ax25_dev); return -EINVAL; } return 0; } struct net_device *ax25_fwd_dev(struct net_device *dev) { ax25_dev *ax25_dev; if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) return dev; if (ax25_dev->forward == NULL) return dev; return ax25_dev->forward; } /* * Free all memory associated with device structures. */ void __exit ax25_dev_free(void) { ax25_dev *s, *n; spin_lock_bh(&ax25_dev_lock); list_for_each_entry_safe(s, n, &ax25_dev_list, list) { netdev_put(s->dev, &s->dev_tracker); list_del(&s->list); ax25_dev_put(s); } spin_unlock_bh(&ax25_dev_lock); } |
| 58 58 58 58 | 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 | // SPDX-License-Identifier: GPL-2.0 /* -*- linux-c -*- * sysctl_net_core.c: sysctl interface to net core subsystem. * * Begun April 1, 1996, Mike Shaver. * Added /proc/sys/net/core directory entry (empty =) ). [MS] */ #include <linux/filter.h> #include <linux/mm.h> #include <linux/sysctl.h> #include <linux/module.h> #include <linux/socket.h> #include <linux/netdevice.h> #include <linux/ratelimit.h> #include <linux/vmalloc.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/sched/isolation.h> #include <net/ip.h> #include <net/sock.h> #include <net/net_ratelimit.h> #include <net/busy_poll.h> #include <net/pkt_sched.h> #include <net/hotdata.h> #include <net/proto_memory.h> #include <net/rps.h> #include "dev.h" #include "net-sysfs.h" static int int_3600 = 3600; static int min_sndbuf = SOCK_MIN_SNDBUF; static int min_rcvbuf = SOCK_MIN_RCVBUF; static int max_skb_frags = MAX_SKB_FRAGS; static int min_mem_pcpu_rsv = SK_MEMORY_PCPU_RESERVE; static int netdev_budget_usecs_min = 2 * USEC_PER_SEC / HZ; static int net_msg_warn; /* Unused, but still a sysctl */ int sysctl_fb_tunnels_only_for_init_net __read_mostly = 0; EXPORT_SYMBOL(sysctl_fb_tunnels_only_for_init_net); /* 0 - Keep current behavior: * IPv4: inherit all current settings from init_net * IPv6: reset all settings to default * 1 - Both inherit all current settings from init_net * 2 - Both reset all settings to default * 3 - Both inherit all settings from current netns */ int sysctl_devconf_inherit_init_net __read_mostly; EXPORT_SYMBOL(sysctl_devconf_inherit_init_net); #if IS_ENABLED(CONFIG_NET_FLOW_LIMIT) || IS_ENABLED(CONFIG_RPS) static int dump_cpumask(void *buffer, size_t *lenp, loff_t *ppos, struct cpumask *mask) { char *kbuf; int len; if (*ppos || !*lenp) { *lenp = 0; return 0; } /* CPUs are displayed as a hex bitmap + a comma between each groups of 8 * nibbles (except the last one which has a newline instead). * Guesstimate the buffer size at the group granularity level. */ len = min(DIV_ROUND_UP(nr_cpumask_bits, 32) * (8 + 1), *lenp); kbuf = kmalloc(len, GFP_KERNEL); if (!kbuf) { *lenp = 0; return -ENOMEM; } len = scnprintf(kbuf, len, "%*pb", cpumask_pr_args(mask)); if (!len) { *lenp = 0; goto free_buf; } /* scnprintf writes a trailing null char not counted in the returned * length, override it with a newline. */ kbuf[len++] = '\n'; memcpy(buffer, kbuf, len); *lenp = len; *ppos += len; free_buf: kfree(kbuf); return 0; } #endif #ifdef CONFIG_RPS DEFINE_MUTEX(rps_default_mask_mutex); static int rps_default_mask_sysctl(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { struct net *net = (struct net *)table->data; struct cpumask *mask; int err = 0; mutex_lock(&rps_default_mask_mutex); mask = net->core.rps_default_mask; if (write) { if (!mask) { mask = kzalloc(cpumask_size(), GFP_KERNEL); net->core.rps_default_mask = mask; } err = -ENOMEM; if (!mask) goto done; err = cpumask_parse(buffer, mask); if (err) goto done; err = rps_cpumask_housekeeping(mask); if (err) goto done; } else { err = dump_cpumask(buffer, lenp, ppos, mask ?: cpu_none_mask); } done: mutex_unlock(&rps_default_mask_mutex); return err; } static int rps_sock_flow_sysctl(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { unsigned int orig_size, size; int ret, i; struct ctl_table tmp = { .data = &size, .maxlen = sizeof(size), .mode = table->mode }; struct rps_sock_flow_table *orig_sock_table, *sock_table; static DEFINE_MUTEX(sock_flow_mutex); mutex_lock(&sock_flow_mutex); orig_sock_table = rcu_dereference_protected( net_hotdata.rps_sock_flow_table, lockdep_is_held(&sock_flow_mutex)); size = orig_size = orig_sock_table ? orig_sock_table->mask + 1 : 0; ret = proc_dointvec(&tmp, write, buffer, lenp, ppos); if (write) { if (size) { if (size > 1<<29) { /* Enforce limit to prevent overflow */ mutex_unlock(&sock_flow_mutex); return -EINVAL; } size = roundup_pow_of_two(size); if (size != orig_size) { sock_table = vmalloc(RPS_SOCK_FLOW_TABLE_SIZE(size)); if (!sock_table) { mutex_unlock(&sock_flow_mutex); return -ENOMEM; } net_hotdata.rps_cpu_mask = roundup_pow_of_two(nr_cpu_ids) - 1; sock_table->mask = size - 1; } else sock_table = orig_sock_table; for (i = 0; i < size; i++) sock_table->ents[i] = RPS_NO_CPU; } else sock_table = NULL; if (sock_table != orig_sock_table) { rcu_assign_pointer(net_hotdata.rps_sock_flow_table, sock_table); if (sock_table) { static_branch_inc(&rps_needed); static_branch_inc(&rfs_needed); } if (orig_sock_table) { static_branch_dec(&rps_needed); static_branch_dec(&rfs_needed); kvfree_rcu(orig_sock_table, rcu); } } } mutex_unlock(&sock_flow_mutex); return ret; } #endif /* CONFIG_RPS */ #ifdef CONFIG_NET_FLOW_LIMIT static DEFINE_MUTEX(flow_limit_update_mutex); static int flow_limit_cpu_sysctl(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { struct sd_flow_limit *cur; struct softnet_data *sd; cpumask_var_t mask; int i, len, ret = 0; if (!alloc_cpumask_var(&mask, GFP_KERNEL)) return -ENOMEM; if (write) { ret = cpumask_parse(buffer, mask); if (ret) goto done; mutex_lock(&flow_limit_update_mutex); len = sizeof(*cur) + netdev_flow_limit_table_len; for_each_possible_cpu(i) { sd = &per_cpu(softnet_data, i); cur = rcu_dereference_protected(sd->flow_limit, lockdep_is_held(&flow_limit_update_mutex)); if (cur && !cpumask_test_cpu(i, mask)) { RCU_INIT_POINTER(sd->flow_limit, NULL); kfree_rcu(cur, rcu); } else if (!cur && cpumask_test_cpu(i, mask)) { cur = kzalloc_node(len, GFP_KERNEL, cpu_to_node(i)); if (!cur) { /* not unwinding previous changes */ ret = -ENOMEM; goto write_unlock; } cur->log_buckets = ilog2(netdev_flow_limit_table_len); rcu_assign_pointer(sd->flow_limit, cur); } } write_unlock: mutex_unlock(&flow_limit_update_mutex); } else { cpumask_clear(mask); rcu_read_lock(); for_each_possible_cpu(i) { sd = &per_cpu(softnet_data, i); if (rcu_dereference(sd->flow_limit)) cpumask_set_cpu(i, mask); } rcu_read_unlock(); ret = dump_cpumask(buffer, lenp, ppos, mask); } done: free_cpumask_var(mask); return ret; } static int flow_limit_table_len_sysctl(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { unsigned int old, *ptr; int ret; mutex_lock(&flow_limit_update_mutex); ptr = table->data; old = *ptr; ret = proc_dointvec(table, write, buffer, lenp, ppos); if (!ret && write && !is_power_of_2(*ptr)) { *ptr = old; ret = -EINVAL; } mutex_unlock(&flow_limit_update_mutex); return ret; } #endif /* CONFIG_NET_FLOW_LIMIT */ #ifdef CONFIG_NET_SCHED static int set_default_qdisc(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { char id[IFNAMSIZ]; struct ctl_table tbl = { .data = id, .maxlen = IFNAMSIZ, }; int ret; qdisc_get_default(id, IFNAMSIZ); ret = proc_dostring(&tbl, write, buffer, lenp, ppos); if (write && ret == 0) ret = qdisc_set_default(id); return ret; } #endif static int proc_do_dev_weight(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { static DEFINE_MUTEX(dev_weight_mutex); int ret, weight; mutex_lock(&dev_weight_mutex); ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos); if (!ret && write) { weight = READ_ONCE(weight_p); WRITE_ONCE(net_hotdata.dev_rx_weight, weight * dev_weight_rx_bias); WRITE_ONCE(net_hotdata.dev_tx_weight, weight * dev_weight_tx_bias); } mutex_unlock(&dev_weight_mutex); return ret; } static int proc_do_rss_key(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { struct ctl_table fake_table; char buf[NETDEV_RSS_KEY_LEN * 3]; snprintf(buf, sizeof(buf), "%*phC", NETDEV_RSS_KEY_LEN, netdev_rss_key); fake_table.data = buf; fake_table.maxlen = sizeof(buf); return proc_dostring(&fake_table, write, buffer, lenp, ppos); } #ifdef CONFIG_BPF_JIT static int proc_dointvec_minmax_bpf_enable(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { int ret, jit_enable = *(int *)table->data; int min = *(int *)table->extra1; int max = *(int *)table->extra2; struct ctl_table tmp = *table; if (write && !capable(CAP_SYS_ADMIN)) return -EPERM; tmp.data = &jit_enable; ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos); if (write && !ret) { if (jit_enable < 2 || (jit_enable == 2 && bpf_dump_raw_ok(current_cred()))) { *(int *)table->data = jit_enable; if (jit_enable == 2) pr_warn("bpf_jit_enable = 2 was set! NEVER use this in production, only for JIT debugging!\n"); } else { ret = -EPERM; } } if (write && ret && min == max) pr_info_once("CONFIG_BPF_JIT_ALWAYS_ON is enabled, bpf_jit_enable is permanently set to 1.\n"); return ret; } # ifdef CONFIG_HAVE_EBPF_JIT static int proc_dointvec_minmax_bpf_restricted(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; return proc_dointvec_minmax(table, write, buffer, lenp, ppos); } # endif /* CONFIG_HAVE_EBPF_JIT */ static int proc_dolongvec_minmax_bpf_restricted(const struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) { if (!capable(CAP_SYS_ADMIN)) return -EPERM; return proc_doulongvec_minmax(table, write, buffer, lenp, ppos); } #endif static struct ctl_table net_core_table[] = { { .procname = "mem_pcpu_rsv", .data = &net_hotdata.sysctl_mem_pcpu_rsv, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &min_mem_pcpu_rsv, }, { .procname = "dev_weight", .data = &weight_p, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_do_dev_weight, .extra1 = SYSCTL_ONE, }, { .procname = "dev_weight_rx_bias", .data = &dev_weight_rx_bias, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_do_dev_weight, .extra1 = SYSCTL_ONE, }, { .procname = "dev_weight_tx_bias", .data = &dev_weight_tx_bias, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_do_dev_weight, .extra1 = SYSCTL_ONE, }, { .procname = "netdev_max_backlog", .data = &net_hotdata.max_backlog, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, { .procname = "netdev_rss_key", .data = &netdev_rss_key, .maxlen = sizeof(int), .mode = 0444, .proc_handler = proc_do_rss_key, }, #ifdef CONFIG_BPF_JIT { .procname = "bpf_jit_enable", .data = &bpf_jit_enable, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax_bpf_enable, # ifdef CONFIG_BPF_JIT_ALWAYS_ON .extra1 = SYSCTL_ONE, .extra2 = SYSCTL_ONE, # else .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_TWO, # endif }, # ifdef CONFIG_HAVE_EBPF_JIT { .procname = "bpf_jit_harden", .data = &bpf_jit_harden, .maxlen = sizeof(int), .mode = 0600, .proc_handler = proc_dointvec_minmax_bpf_restricted, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_TWO, }, { .procname = "bpf_jit_kallsyms", .data = &bpf_jit_kallsyms, .maxlen = sizeof(int), .mode = 0600, .proc_handler = proc_dointvec_minmax_bpf_restricted, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, }, # endif { .procname = "bpf_jit_limit", .data = &bpf_jit_limit, .maxlen = sizeof(long), .mode = 0600, .proc_handler = proc_dolongvec_minmax_bpf_restricted, .extra1 = SYSCTL_LONG_ONE, .extra2 = &bpf_jit_limit_max, }, #endif { .procname = "netdev_tstamp_prequeue", .data = &net_hotdata.tstamp_prequeue, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, { .procname = "message_cost", .data = &net_ratelimit_state.interval, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_jiffies, }, { .procname = "message_burst", .data = &net_ratelimit_state.burst, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec, }, #ifdef CONFIG_RPS { .procname = "rps_sock_flow_entries", .maxlen = sizeof(int), .mode = 0644, .proc_handler = rps_sock_flow_sysctl }, #endif #ifdef CONFIG_NET_FLOW_LIMIT { .procname = "flow_limit_cpu_bitmap", .mode = 0644, .proc_handler = flow_limit_cpu_sysctl }, { .procname = "flow_limit_table_len", .data = &netdev_flow_limit_table_len, .maxlen = sizeof(int), .mode = 0644, .proc_handler = flow_limit_table_len_sysctl }, #endif /* CONFIG_NET_FLOW_LIMIT */ #ifdef CONFIG_NET_RX_BUSY_POLL { .procname = "busy_poll", .data = &sysctl_net_busy_poll, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, }, { .procname = "busy_read", .data = &sysctl_net_busy_read, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, }, #endif #ifdef CONFIG_NET_SCHED { .procname = "default_qdisc", .mode = 0644, .maxlen = IFNAMSIZ, .proc_handler = set_default_qdisc }, #endif { .procname = "netdev_budget", .data = &net_hotdata.netdev_budget, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, { .procname = "warnings", .data = &net_msg_warn, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec }, { .procname = "max_skb_frags", .data = &net_hotdata.sysctl_max_skb_frags, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ONE, .extra2 = &max_skb_frags, }, { .procname = "netdev_budget_usecs", .data = &net_hotdata.netdev_budget_usecs, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &netdev_budget_usecs_min, }, { .procname = "fb_tunnels_only_for_init_net", .data = &sysctl_fb_tunnels_only_for_init_net, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_TWO, }, { .procname = "devconf_inherit_init_net", .data = &sysctl_devconf_inherit_init_net, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_THREE, }, { .procname = "high_order_alloc_disable", .data = &net_high_order_alloc_disable_key.key, .maxlen = sizeof(net_high_order_alloc_disable_key), .mode = 0644, .proc_handler = proc_do_static_key, }, { .procname = "gro_normal_batch", .data = &net_hotdata.gro_normal_batch, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ONE, }, { .procname = "netdev_unregister_timeout_secs", .data = &netdev_unregister_timeout_secs, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ONE, .extra2 = &int_3600, }, { .procname = "skb_defer_max", .data = &net_hotdata.sysctl_skb_defer_max, .maxlen = sizeof(unsigned int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, }, }; static struct ctl_table netns_core_table[] = { #if IS_ENABLED(CONFIG_RPS) { .procname = "rps_default_mask", .data = &init_net, .mode = 0644, .proc_handler = rps_default_mask_sysctl }, #endif { .procname = "somaxconn", .data = &init_net.core.sysctl_somaxconn, .maxlen = sizeof(int), .mode = 0644, .extra1 = SYSCTL_ZERO, .proc_handler = proc_dointvec_minmax }, { .procname = "optmem_max", .data = &init_net.core.sysctl_optmem_max, .maxlen = sizeof(int), .mode = 0644, .extra1 = SYSCTL_ZERO, .proc_handler = proc_dointvec_minmax }, { .procname = "txrehash", .data = &init_net.core.sysctl_txrehash, .maxlen = sizeof(u8), .mode = 0644, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE, .proc_handler = proc_dou8vec_minmax, }, { .procname = "tstamp_allow_data", .data = &init_net.core.sysctl_tstamp_allow_data, .maxlen = sizeof(u8), .mode = 0644, .proc_handler = proc_dou8vec_minmax, .extra1 = SYSCTL_ZERO, .extra2 = SYSCTL_ONE }, /* sysctl_core_net_init() will set the values after this * to readonly in network namespaces */ { .procname = "wmem_max", .data = &sysctl_wmem_max, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &min_sndbuf, }, { .procname = "rmem_max", .data = &sysctl_rmem_max, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &min_rcvbuf, }, { .procname = "wmem_default", .data = &sysctl_wmem_default, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &min_sndbuf, }, { .procname = "rmem_default", .data = &sysctl_rmem_default, .maxlen = sizeof(int), .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = &min_rcvbuf, }, }; static int __init fb_tunnels_only_for_init_net_sysctl_setup(char *str) { /* fallback tunnels for initns only */ if (!strncmp(str, "initns", 6)) sysctl_fb_tunnels_only_for_init_net = 1; /* no fallback tunnels anywhere */ else if (!strncmp(str, "none", 4)) sysctl_fb_tunnels_only_for_init_net = 2; return 1; } __setup("fb_tunnels=", fb_tunnels_only_for_init_net_sysctl_setup); static __net_init int sysctl_core_net_init(struct net *net) { size_t table_size = ARRAY_SIZE(netns_core_table); struct ctl_table *tbl; tbl = netns_core_table; if (!net_eq(net, &init_net)) { int i; tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); if (tbl == NULL) goto err_dup; for (i = 0; i < table_size; ++i) { if (tbl[i].data == &sysctl_wmem_max) break; tbl[i].data += (char *)net - (char *)&init_net; } for (; i < table_size; ++i) tbl[i].mode &= ~0222; } net->core.sysctl_hdr = register_net_sysctl_sz(net, "net/core", tbl, table_size); if (net->core.sysctl_hdr == NULL) goto err_reg; return 0; err_reg: if (tbl != netns_core_table) kfree(tbl); err_dup: return -ENOMEM; } static __net_exit void sysctl_core_net_exit(struct net *net) { const struct ctl_table *tbl; tbl = net->core.sysctl_hdr->ctl_table_arg; unregister_net_sysctl_table(net->core.sysctl_hdr); BUG_ON(tbl == netns_core_table); #if IS_ENABLED(CONFIG_RPS) kfree(net->core.rps_default_mask); #endif kfree(tbl); } static __net_initdata struct pernet_operations sysctl_core_ops = { .init = sysctl_core_net_init, .exit = sysctl_core_net_exit, }; static __init int sysctl_core_init(void) { register_net_sysctl(&init_net, "net/core", net_core_table); return register_pernet_subsys(&sysctl_core_ops); } fs_initcall(sysctl_core_init); |
| 3 5 8 8 106 100 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 | // SPDX-License-Identifier: GPL-2.0-only #include <linux/init.h> #include <linux/scatterlist.h> #include <linux/mempool.h> #include <linux/slab.h> #define SG_MEMPOOL_NR ARRAY_SIZE(sg_pools) #define SG_MEMPOOL_SIZE 2 struct sg_pool { size_t size; char *name; struct kmem_cache *slab; mempool_t *pool; }; #define SP(x) { .size = x, "sgpool-" __stringify(x) } #if (SG_CHUNK_SIZE < 32) #error SG_CHUNK_SIZE is too small (must be 32 or greater) #endif static struct sg_pool sg_pools[] = { SP(8), SP(16), #if (SG_CHUNK_SIZE > 32) SP(32), #if (SG_CHUNK_SIZE > 64) SP(64), #if (SG_CHUNK_SIZE > 128) SP(128), #if (SG_CHUNK_SIZE > 256) #error SG_CHUNK_SIZE is too large (256 MAX) #endif #endif #endif #endif SP(SG_CHUNK_SIZE) }; #undef SP static inline unsigned int sg_pool_index(unsigned short nents) { unsigned int index; BUG_ON(nents > SG_CHUNK_SIZE); if (nents <= 8) index = 0; else index = get_count_order(nents) - 3; return index; } static void sg_pool_free(struct scatterlist *sgl, unsigned int nents) { struct sg_pool *sgp; sgp = sg_pools + sg_pool_index(nents); mempool_free(sgl, sgp->pool); } static struct scatterlist *sg_pool_alloc(unsigned int nents, gfp_t gfp_mask) { struct sg_pool *sgp; sgp = sg_pools + sg_pool_index(nents); return mempool_alloc(sgp->pool, gfp_mask); } /** * sg_free_table_chained - Free a previously mapped sg table * @table: The sg table header to use * @nents_first_chunk: size of the first_chunk SGL passed to * sg_alloc_table_chained * * Description: * Free an sg table previously allocated and setup with * sg_alloc_table_chained(). * * @nents_first_chunk has to be same with that same parameter passed * to sg_alloc_table_chained(). * **/ void sg_free_table_chained(struct sg_table *table, unsigned nents_first_chunk) { if (table->orig_nents <= nents_first_chunk) return; if (nents_first_chunk == 1) nents_first_chunk = 0; __sg_free_table(table, SG_CHUNK_SIZE, nents_first_chunk, sg_pool_free, table->orig_nents); } EXPORT_SYMBOL_GPL(sg_free_table_chained); /** * sg_alloc_table_chained - Allocate and chain SGLs in an sg table * @table: The sg table header to use * @nents: Number of entries in sg list * @first_chunk: first SGL * @nents_first_chunk: number of the SGL of @first_chunk * * Description: * Allocate and chain SGLs in an sg table. If @nents@ is larger than * @nents_first_chunk a chained sg table will be setup. @first_chunk is * ignored if nents_first_chunk <= 1 because user expects the SGL points * non-chain SGL. * **/ int sg_alloc_table_chained(struct sg_table *table, int nents, struct scatterlist *first_chunk, unsigned nents_first_chunk) { int ret; BUG_ON(!nents); if (first_chunk && nents_first_chunk) { if (nents <= nents_first_chunk) { table->nents = table->orig_nents = nents; sg_init_table(table->sgl, nents); return 0; } } /* User supposes that the 1st SGL includes real entry */ if (nents_first_chunk <= 1) { first_chunk = NULL; nents_first_chunk = 0; } ret = __sg_alloc_table(table, nents, SG_CHUNK_SIZE, first_chunk, nents_first_chunk, GFP_ATOMIC, sg_pool_alloc); if (unlikely(ret)) sg_free_table_chained(table, nents_first_chunk); return ret; } EXPORT_SYMBOL_GPL(sg_alloc_table_chained); static __init int sg_pool_init(void) { int i; for (i = 0; i < SG_MEMPOOL_NR; i++) { struct sg_pool *sgp = sg_pools + i; int size = sgp->size * sizeof(struct scatterlist); sgp->slab = kmem_cache_create(sgp->name, size, 0, SLAB_HWCACHE_ALIGN, NULL); if (!sgp->slab) { printk(KERN_ERR "SG_POOL: can't init sg slab %s\n", sgp->name); goto cleanup_sdb; } sgp->pool = mempool_create_slab_pool(SG_MEMPOOL_SIZE, sgp->slab); if (!sgp->pool) { printk(KERN_ERR "SG_POOL: can't init sg mempool %s\n", sgp->name); goto cleanup_sdb; } } return 0; cleanup_sdb: for (i = 0; i < SG_MEMPOOL_NR; i++) { struct sg_pool *sgp = sg_pools + i; mempool_destroy(sgp->pool); kmem_cache_destroy(sgp->slab); } return -ENOMEM; } subsys_initcall(sg_pool_init); |
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All rights reserved. * * Copyright (c) 2005-2007 Matthieu Castet <castet.matthieu@free.fr> * Copyright (c) 2005-2007 Stanislaw Gruszka <stf_xl@wp.pl> * * HISTORY : some part of the code was base on ueagle 1.3 BSD driver, * Damien Bergamini agree to put his code under a DUAL GPL/BSD license. * * The rest of the code was rewritten from scratch. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/crc32.h> #include <linux/usb.h> #include <linux/firmware.h> #include <linux/ctype.h> #include <linux/sched.h> #include <linux/kthread.h> #include <linux/mutex.h> #include <linux/freezer.h> #include <linux/slab.h> #include <linux/kernel.h> #include <linux/unaligned.h> #include "usbatm.h" #define EAGLEUSBVERSION "ueagle 1.4" /* * Debug macros */ #define uea_dbg(usb_dev, format, args...) \ do { \ if (debug >= 1) \ dev_dbg(&(usb_dev)->dev, \ "[ueagle-atm dbg] %s: " format, \ __func__, ##args); \ } while (0) #define uea_vdbg(usb_dev, format, args...) \ do { \ if (debug >= 2) \ dev_dbg(&(usb_dev)->dev, \ "[ueagle-atm vdbg] " format, ##args); \ } while (0) #define uea_enters(usb_dev) \ uea_vdbg(usb_dev, "entering %s\n" , __func__) #define uea_leaves(usb_dev) \ uea_vdbg(usb_dev, "leaving %s\n" , __func__) #define uea_err(usb_dev, format, args...) \ dev_err(&(usb_dev)->dev , "[UEAGLE-ATM] " format , ##args) #define uea_warn(usb_dev, format, args...) \ dev_warn(&(usb_dev)->dev , "[Ueagle-atm] " format, ##args) #define uea_info(usb_dev, format, args...) \ dev_info(&(usb_dev)->dev , "[ueagle-atm] " format, ##args) struct intr_pkt; /* cmv's from firmware */ struct uea_cmvs_v1 { u32 address; u16 offset; u32 data; } __packed; struct uea_cmvs_v2 { u32 group; u32 address; u32 offset; u32 data; } __packed; /* information about currently processed cmv */ struct cmv_dsc_e1 { u8 function; u16 idx; u32 address; u16 offset; }; struct cmv_dsc_e4 { u16 function; u16 offset; u16 address; u16 group; }; union cmv_dsc { struct cmv_dsc_e1 e1; struct cmv_dsc_e4 e4; }; struct uea_softc { struct usb_device *usb_dev; struct usbatm_data *usbatm; int modem_index; unsigned int driver_info; int annex; #define ANNEXA 0 #define ANNEXB 1 int booting; int reset; wait_queue_head_t sync_q; struct task_struct *kthread; u32 data; u32 data1; int cmv_ack; union cmv_dsc cmv_dsc; struct work_struct task; u16 pageno; u16 ovl; const struct firmware *dsp_firm; struct urb *urb_int; void (*dispatch_cmv)(struct uea_softc *, struct intr_pkt *); void (*schedule_load_page)(struct uea_softc *, struct intr_pkt *); int (*stat)(struct uea_softc *); int (*send_cmvs)(struct uea_softc *); /* keep in sync with eaglectl */ struct uea_stats { struct { u32 state; u32 flags; u32 mflags; u32 vidcpe; u32 vidco; u32 dsrate; u32 usrate; u32 dsunc; u32 usunc; u32 dscorr; u32 uscorr; u32 txflow; u32 rxflow; u32 usattenuation; u32 dsattenuation; u32 dsmargin; u32 usmargin; u32 firmid; } phy; } stats; }; /* * Elsa IDs */ #define ELSA_VID 0x05CC #define ELSA_PID_PSTFIRM 0x3350 #define ELSA_PID_PREFIRM 0x3351 #define ELSA_PID_A_PREFIRM 0x3352 #define ELSA_PID_A_PSTFIRM 0x3353 #define ELSA_PID_B_PREFIRM 0x3362 #define ELSA_PID_B_PSTFIRM 0x3363 /* * Devolo IDs : pots if (pid & 0x10) */ #define DEVOLO_VID 0x1039 #define DEVOLO_EAGLE_I_A_PID_PSTFIRM 0x2110 #define DEVOLO_EAGLE_I_A_PID_PREFIRM 0x2111 #define DEVOLO_EAGLE_I_B_PID_PSTFIRM 0x2100 #define DEVOLO_EAGLE_I_B_PID_PREFIRM 0x2101 #define DEVOLO_EAGLE_II_A_PID_PSTFIRM 0x2130 #define DEVOLO_EAGLE_II_A_PID_PREFIRM 0x2131 #define DEVOLO_EAGLE_II_B_PID_PSTFIRM 0x2120 #define DEVOLO_EAGLE_II_B_PID_PREFIRM 0x2121 /* * Reference design USB IDs */ #define ANALOG_VID 0x1110 #define ADI930_PID_PREFIRM 0x9001 #define ADI930_PID_PSTFIRM 0x9000 #define EAGLE_I_PID_PREFIRM 0x9010 /* Eagle I */ #define EAGLE_I_PID_PSTFIRM 0x900F /* Eagle I */ #define EAGLE_IIC_PID_PREFIRM 0x9024 /* Eagle IIC */ #define EAGLE_IIC_PID_PSTFIRM 0x9023 /* Eagle IIC */ #define EAGLE_II_PID_PREFIRM 0x9022 /* Eagle II */ #define EAGLE_II_PID_PSTFIRM 0x9021 /* Eagle II */ #define EAGLE_III_PID_PREFIRM 0x9032 /* Eagle III */ #define EAGLE_III_PID_PSTFIRM 0x9031 /* Eagle III */ #define EAGLE_IV_PID_PREFIRM 0x9042 /* Eagle IV */ #define EAGLE_IV_PID_PSTFIRM 0x9041 /* Eagle IV */ /* * USR USB IDs */ #define USR_VID 0x0BAF #define MILLER_A_PID_PREFIRM 0x00F2 #define MILLER_A_PID_PSTFIRM 0x00F1 #define MILLER_B_PID_PREFIRM 0x00FA #define MILLER_B_PID_PSTFIRM 0x00F9 #define HEINEKEN_A_PID_PREFIRM 0x00F6 #define HEINEKEN_A_PID_PSTFIRM 0x00F5 #define HEINEKEN_B_PID_PREFIRM 0x00F8 #define HEINEKEN_B_PID_PSTFIRM 0x00F7 #define PREFIRM 0 #define PSTFIRM (1<<7) #define AUTO_ANNEX_A (1<<8) #define AUTO_ANNEX_B (1<<9) enum { ADI930 = 0, EAGLE_I, EAGLE_II, EAGLE_III, EAGLE_IV }; /* macros for both struct usb_device_id and struct uea_softc */ #define UEA_IS_PREFIRM(x) \ (!((x)->driver_info & PSTFIRM)) #define UEA_CHIP_VERSION(x) \ ((x)->driver_info & 0xf) #define IS_ISDN(x) \ ((x)->annex & ANNEXB) #define INS_TO_USBDEV(ins) (ins->usb_dev) #define GET_STATUS(data) \ ((data >> 8) & 0xf) #define IS_OPERATIONAL(sc) \ ((UEA_CHIP_VERSION(sc) != EAGLE_IV) ? \ (GET_STATUS(sc->stats.phy.state) == 2) : \ (sc->stats.phy.state == 7)) /* * Set of macros to handle unaligned data in the firmware blob. * The FW_GET_BYTE() macro is provided only for consistency. */ #define FW_GET_BYTE(p) (*((__u8 *) (p))) #define FW_DIR "ueagle-atm/" #define EAGLE_FIRMWARE FW_DIR "eagle.fw" #define ADI930_FIRMWARE FW_DIR "adi930.fw" #define EAGLE_I_FIRMWARE FW_DIR "eagleI.fw" #define EAGLE_II_FIRMWARE FW_DIR "eagleII.fw" #define EAGLE_III_FIRMWARE FW_DIR "eagleIII.fw" #define EAGLE_IV_FIRMWARE FW_DIR "eagleIV.fw" #define DSP4I_FIRMWARE FW_DIR "DSP4i.bin" #define DSP4P_FIRMWARE FW_DIR "DSP4p.bin" #define DSP9I_FIRMWARE FW_DIR "DSP9i.bin" #define DSP9P_FIRMWARE FW_DIR "DSP9p.bin" #define DSPEI_FIRMWARE FW_DIR "DSPei.bin" #define DSPEP_FIRMWARE FW_DIR "DSPep.bin" #define FPGA930_FIRMWARE FW_DIR "930-fpga.bin" #define CMV4P_FIRMWARE FW_DIR "CMV4p.bin" #define CMV4PV2_FIRMWARE FW_DIR "CMV4p.bin.v2" #define CMV4I_FIRMWARE FW_DIR "CMV4i.bin" #define CMV4IV2_FIRMWARE FW_DIR "CMV4i.bin.v2" #define CMV9P_FIRMWARE FW_DIR "CMV9p.bin" #define CMV9PV2_FIRMWARE FW_DIR "CMV9p.bin.v2" #define CMV9I_FIRMWARE FW_DIR "CMV9i.bin" #define CMV9IV2_FIRMWARE FW_DIR "CMV9i.bin.v2" #define CMVEP_FIRMWARE FW_DIR "CMVep.bin" #define CMVEPV2_FIRMWARE FW_DIR "CMVep.bin.v2" #define CMVEI_FIRMWARE FW_DIR "CMVei.bin" #define CMVEIV2_FIRMWARE FW_DIR "CMVei.bin.v2" #define UEA_FW_NAME_MAX 30 #define NB_MODEM 4 #define BULK_TIMEOUT 300 #define CTRL_TIMEOUT 1000 #define ACK_TIMEOUT msecs_to_jiffies(3000) #define UEA_INTR_IFACE_NO 0 #define UEA_US_IFACE_NO 1 #define UEA_DS_IFACE_NO 2 #define FASTEST_ISO_INTF 8 #define UEA_BULK_DATA_PIPE 0x02 #define UEA_IDMA_PIPE 0x04 #define UEA_INTR_PIPE 0x04 #define UEA_ISO_DATA_PIPE 0x08 #define UEA_E1_SET_BLOCK 0x0001 #define UEA_E4_SET_BLOCK 0x002c #define UEA_SET_MODE 0x0003 #define UEA_SET_2183_DATA 0x0004 #define UEA_SET_TIMEOUT 0x0011 #define UEA_LOOPBACK_OFF 0x0002 #define UEA_LOOPBACK_ON 0x0003 #define UEA_BOOT_IDMA 0x0006 #define UEA_START_RESET 0x0007 #define UEA_END_RESET 0x0008 #define UEA_SWAP_MAILBOX (0x3fcd | 0x4000) #define UEA_MPTX_START (0x3fce | 0x4000) #define UEA_MPTX_MAILBOX (0x3fd6 | 0x4000) #define UEA_MPRX_MAILBOX (0x3fdf | 0x4000) /* block information in eagle4 dsp firmware */ struct block_index { __le32 PageOffset; __le32 NotLastBlock; __le32 dummy; __le32 PageSize; __le32 PageAddress; __le16 dummy1; __le16 PageNumber; } __packed; #define E4_IS_BOOT_PAGE(PageSize) ((le32_to_cpu(PageSize)) & 0x80000000) #define E4_PAGE_BYTES(PageSize) ((le32_to_cpu(PageSize) & 0x7fffffff) * 4) #define E4_L1_STRING_HEADER 0x10 #define E4_MAX_PAGE_NUMBER 0x58 #define E4_NO_SWAPPAGE_HEADERS 0x31 /* l1_code is eagle4 dsp firmware format */ struct l1_code { u8 string_header[E4_L1_STRING_HEADER]; u8 page_number_to_block_index[E4_MAX_PAGE_NUMBER]; struct block_index page_header[E4_NO_SWAPPAGE_HEADERS]; u8 code[]; } __packed; /* structures describing a block within a DSP page */ struct block_info_e1 { __le16 wHdr; __le16 wAddress; __le16 wSize; __le16 wOvlOffset; __le16 wOvl; /* overlay */ __le16 wLast; } __packed; #define E1_BLOCK_INFO_SIZE 12 struct block_info_e4 { __be16 wHdr; __u8 bBootPage; __u8 bPageNumber; __be32 dwSize; __be32 dwAddress; __be16 wReserved; } __packed; #define E4_BLOCK_INFO_SIZE 14 #define UEA_BIHDR 0xabcd #define UEA_RESERVED 0xffff /* constants describing cmv type */ #define E1_PREAMBLE 0x535c #define E1_MODEMTOHOST 0x01 #define E1_HOSTTOMODEM 0x10 #define E1_MEMACCESS 0x1 #define E1_ADSLDIRECTIVE 0x7 #define E1_FUNCTION_TYPE(f) ((f) >> 4) #define E1_FUNCTION_SUBTYPE(f) ((f) & 0x0f) #define E4_MEMACCESS 0 #define E4_ADSLDIRECTIVE 0xf #define E4_FUNCTION_TYPE(f) ((f) >> 8) #define E4_FUNCTION_SIZE(f) ((f) & 0x0f) #define E4_FUNCTION_SUBTYPE(f) (((f) >> 4) & 0x0f) /* for MEMACCESS */ #define E1_REQUESTREAD 0x0 #define E1_REQUESTWRITE 0x1 #define E1_REPLYREAD 0x2 #define E1_REPLYWRITE 0x3 #define E4_REQUESTREAD 0x0 #define E4_REQUESTWRITE 0x4 #define E4_REPLYREAD (E4_REQUESTREAD | 1) #define E4_REPLYWRITE (E4_REQUESTWRITE | 1) /* for ADSLDIRECTIVE */ #define E1_KERNELREADY 0x0 #define E1_MODEMREADY 0x1 #define E4_KERNELREADY 0x0 #define E4_MODEMREADY 0x1 #define E1_MAKEFUNCTION(t, s) (((t) & 0xf) << 4 | ((s) & 0xf)) #define E4_MAKEFUNCTION(t, st, s) (((t) & 0xf) << 8 | \ ((st) & 0xf) << 4 | ((s) & 0xf)) #define E1_MAKESA(a, b, c, d) \ (((c) & 0xff) << 24 | \ ((d) & 0xff) << 16 | \ ((a) & 0xff) << 8 | \ ((b) & 0xff)) #define E1_GETSA1(a) ((a >> 8) & 0xff) #define E1_GETSA2(a) (a & 0xff) #define E1_GETSA3(a) ((a >> 24) & 0xff) #define E1_GETSA4(a) ((a >> 16) & 0xff) #define E1_SA_CNTL E1_MAKESA('C', 'N', 'T', 'L') #define E1_SA_DIAG E1_MAKESA('D', 'I', 'A', 'G') #define E1_SA_INFO E1_MAKESA('I', 'N', 'F', 'O') #define E1_SA_OPTN E1_MAKESA('O', 'P', 'T', 'N') #define E1_SA_RATE E1_MAKESA('R', 'A', 'T', 'E') #define E1_SA_STAT E1_MAKESA('S', 'T', 'A', 'T') #define E4_SA_CNTL 1 #define E4_SA_STAT 2 #define E4_SA_INFO 3 #define E4_SA_TEST 4 #define E4_SA_OPTN 5 #define E4_SA_RATE 6 #define E4_SA_DIAG 7 #define E4_SA_CNFG 8 /* structures representing a CMV (Configuration and Management Variable) */ struct cmv_e1 { __le16 wPreamble; __u8 bDirection; __u8 bFunction; __le16 wIndex; __le32 dwSymbolicAddress; __le16 wOffsetAddress; __le32 dwData; } __packed; struct cmv_e4 { __be16 wGroup; __be16 wFunction; __be16 wOffset; __be16 wAddress; __be32 dwData[6]; } __packed; /* structures representing swap information */ struct swap_info_e1 { __u8 bSwapPageNo; __u8 bOvl; /* overlay */ } __packed; struct swap_info_e4 { __u8 bSwapPageNo; } __packed; /* structures representing interrupt data */ #define e1_bSwapPageNo u.e1.s1.swapinfo.bSwapPageNo #define e1_bOvl u.e1.s1.swapinfo.bOvl #define e4_bSwapPageNo u.e4.s1.swapinfo.bSwapPageNo #define INT_LOADSWAPPAGE 0x0001 #define INT_INCOMINGCMV 0x0002 union intr_data_e1 { struct { struct swap_info_e1 swapinfo; __le16 wDataSize; } __packed s1; struct { struct cmv_e1 cmv; __le16 wDataSize; } __packed s2; } __packed; union intr_data_e4 { struct { struct swap_info_e4 swapinfo; __le16 wDataSize; } __packed s1; struct { struct cmv_e4 cmv; __le16 wDataSize; } __packed s2; } __packed; struct intr_pkt { __u8 bType; __u8 bNotification; __le16 wValue; __le16 wIndex; __le16 wLength; __le16 wInterrupt; union { union intr_data_e1 e1; union intr_data_e4 e4; } u; } __packed; #define E1_INTR_PKT_SIZE 28 #define E4_INTR_PKT_SIZE 64 static struct usb_driver uea_driver; static DEFINE_MUTEX(uea_mutex); static const char * const chip_name[] = { "ADI930", "Eagle I", "Eagle II", "Eagle III", "Eagle IV"}; static int modem_index; static unsigned int debug; static unsigned int altsetting[NB_MODEM] = { [0 ... (NB_MODEM - 1)] = FASTEST_ISO_INTF}; static bool sync_wait[NB_MODEM]; static char *cmv_file[NB_MODEM]; static int annex[NB_MODEM]; module_param(debug, uint, 0644); MODULE_PARM_DESC(debug, "module debug level (0=off,1=on,2=verbose)"); module_param_array(altsetting, uint, NULL, 0644); MODULE_PARM_DESC(altsetting, "alternate setting for incoming traffic: 0=bulk, " "1=isoc slowest, ... , 8=isoc fastest (default)"); module_param_array(sync_wait, bool, NULL, 0644); MODULE_PARM_DESC(sync_wait, "wait the synchronisation before starting ATM"); module_param_array(cmv_file, charp, NULL, 0644); MODULE_PARM_DESC(cmv_file, "file name with configuration and management variables"); module_param_array(annex, uint, NULL, 0644); MODULE_PARM_DESC(annex, "manually set annex a/b (0=auto, 1=annex a, 2=annex b)"); #define uea_wait(sc, cond, timeo) \ ({ \ int _r = wait_event_freezable_timeout(sc->sync_q, \ (cond) || kthread_should_stop(), timeo); \ if (kthread_should_stop()) \ _r = -ENODEV; \ _r; \ }) #define UPDATE_ATM_STAT(type, val) \ do { \ if (sc->usbatm->atm_dev) \ sc->usbatm->atm_dev->type = val; \ } while (0) #define UPDATE_ATM_SIGNAL(val) \ do { \ if (sc->usbatm->atm_dev) \ atm_dev_signal_change(sc->usbatm->atm_dev, val); \ } while (0) /* Firmware loading */ #define LOAD_INTERNAL 0xA0 #define F8051_USBCS 0x7f92 /* * uea_send_modem_cmd - Send a command for pre-firmware devices. */ static int uea_send_modem_cmd(struct usb_device *usb, u16 addr, u16 size, const u8 *buff) { int ret = -ENOMEM; u8 *xfer_buff; xfer_buff = kmemdup(buff, size, GFP_KERNEL); if (xfer_buff) { ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), LOAD_INTERNAL, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, addr, 0, xfer_buff, size, CTRL_TIMEOUT); kfree(xfer_buff); } if (ret < 0) return ret; return (ret == size) ? 0 : -EIO; } static void uea_upload_pre_firmware(const struct firmware *fw_entry, void *context) { struct usb_device *usb = context; const u8 *pfw; u8 value; u32 crc = 0; int ret, size; uea_enters(usb); if (!fw_entry) { uea_err(usb, "firmware is not available\n"); goto err; } pfw = fw_entry->data; size = fw_entry->size; if (size < 4) goto err_fw_corrupted; crc = get_unaligned_le32(pfw); pfw += 4; size -= 4; if (crc32_be(0, pfw, size) != crc) goto err_fw_corrupted; /* * Start to upload firmware : send reset */ value = 1; ret = uea_send_modem_cmd(usb, F8051_USBCS, sizeof(value), &value); if (ret < 0) { uea_err(usb, "modem reset failed with error %d\n", ret); goto err; } while (size > 3) { u8 len = FW_GET_BYTE(pfw); u16 add = get_unaligned_le16(pfw + 1); size -= len + 3; if (size < 0) goto err_fw_corrupted; ret = uea_send_modem_cmd(usb, add, len, pfw + 3); if (ret < 0) { uea_err(usb, "uploading firmware data failed " "with error %d\n", ret); goto err; } pfw += len + 3; } if (size != 0) goto err_fw_corrupted; /* * Tell the modem we finish : de-assert reset */ value = 0; ret = uea_send_modem_cmd(usb, F8051_USBCS, 1, &value); if (ret < 0) uea_err(usb, "modem de-assert failed with error %d\n", ret); else uea_info(usb, "firmware uploaded\n"); goto err; err_fw_corrupted: uea_err(usb, "firmware is corrupted\n"); err: release_firmware(fw_entry); uea_leaves(usb); } /* * uea_load_firmware - Load usb firmware for pre-firmware devices. */ static int uea_load_firmware(struct usb_device *usb, unsigned int ver) { int ret; char *fw_name = EAGLE_FIRMWARE; uea_enters(usb); uea_info(usb, "pre-firmware device, uploading firmware\n"); switch (ver) { case ADI930: fw_name = ADI930_FIRMWARE; break; case EAGLE_I: fw_name = EAGLE_I_FIRMWARE; break; case EAGLE_II: fw_name = EAGLE_II_FIRMWARE; break; case EAGLE_III: fw_name = EAGLE_III_FIRMWARE; break; case EAGLE_IV: fw_name = EAGLE_IV_FIRMWARE; break; } ret = request_firmware_nowait(THIS_MODULE, 1, fw_name, &usb->dev, GFP_KERNEL, usb, uea_upload_pre_firmware); if (ret) uea_err(usb, "firmware %s is not available\n", fw_name); else uea_info(usb, "loading firmware %s\n", fw_name); uea_leaves(usb); return ret; } /* modem management : dsp firmware, send/read CMV, monitoring statistic */ /* * Make sure that the DSP code provided is safe to use. */ static int check_dsp_e1(const u8 *dsp, unsigned int len) { u8 pagecount, blockcount; u16 blocksize; u32 pageoffset; unsigned int i, j, p, pp; pagecount = FW_GET_BYTE(dsp); p = 1; /* enough space for page offsets? */ if (p + 4 * pagecount > len) return 1; for (i = 0; i < pagecount; i++) { pageoffset = get_unaligned_le32(dsp + p); p += 4; if (pageoffset == 0) continue; /* enough space for blockcount? */ if (pageoffset >= len) return 1; pp = pageoffset; blockcount = FW_GET_BYTE(dsp + pp); pp += 1; for (j = 0; j < blockcount; j++) { /* enough space for block header? */ if (pp + 4 > len) return 1; pp += 2; /* skip blockaddr */ blocksize = get_unaligned_le16(dsp + pp); pp += 2; /* enough space for block data? */ if (pp + blocksize > len) return 1; pp += blocksize; } } return 0; } static int check_dsp_e4(const u8 *dsp, int len) { int i; struct l1_code *p = (struct l1_code *) dsp; unsigned int sum = p->code - dsp; if (len < sum) return 1; if (strcmp("STRATIPHY ANEXA", p->string_header) != 0 && strcmp("STRATIPHY ANEXB", p->string_header) != 0) return 1; for (i = 0; i < E4_MAX_PAGE_NUMBER; i++) { struct block_index *blockidx; u8 blockno = p->page_number_to_block_index[i]; if (blockno >= E4_NO_SWAPPAGE_HEADERS) continue; do { u64 l; if (blockno >= E4_NO_SWAPPAGE_HEADERS) return 1; blockidx = &p->page_header[blockno++]; if ((u8 *)(blockidx + 1) - dsp >= len) return 1; if (le16_to_cpu(blockidx->PageNumber) != i) return 1; l = E4_PAGE_BYTES(blockidx->PageSize); sum += l; l += le32_to_cpu(blockidx->PageOffset); if (l > len) return 1; /* zero is zero regardless endianness */ } while (blockidx->NotLastBlock); } return (sum == len) ? 0 : 1; } /* * send data to the idma pipe * */ static int uea_idma_write(struct uea_softc *sc, const void *data, u32 size) { int ret = -ENOMEM; u8 *xfer_buff; int bytes_read; xfer_buff = kmemdup(data, size, GFP_KERNEL); if (!xfer_buff) { uea_err(INS_TO_USBDEV(sc), "can't allocate xfer_buff\n"); return ret; } ret = usb_bulk_msg(sc->usb_dev, usb_sndbulkpipe(sc->usb_dev, UEA_IDMA_PIPE), xfer_buff, size, &bytes_read, BULK_TIMEOUT); kfree(xfer_buff); if (ret < 0) return ret; if (size != bytes_read) { uea_err(INS_TO_USBDEV(sc), "size != bytes_read %d %d\n", size, bytes_read); return -EIO; } return 0; } static int request_dsp(struct uea_softc *sc) { int ret; char *dsp_name; if (UEA_CHIP_VERSION(sc) == EAGLE_IV) { if (IS_ISDN(sc)) dsp_name = DSP4I_FIRMWARE; else dsp_name = DSP4P_FIRMWARE; } else if (UEA_CHIP_VERSION(sc) == ADI930) { if (IS_ISDN(sc)) dsp_name = DSP9I_FIRMWARE; else dsp_name = DSP9P_FIRMWARE; } else { if (IS_ISDN(sc)) dsp_name = DSPEI_FIRMWARE; else dsp_name = DSPEP_FIRMWARE; } ret = request_firmware(&sc->dsp_firm, dsp_name, &sc->usb_dev->dev); if (ret < 0) { uea_err(INS_TO_USBDEV(sc), "requesting firmware %s failed with error %d\n", dsp_name, ret); return ret; } if (UEA_CHIP_VERSION(sc) == EAGLE_IV) ret = check_dsp_e4(sc->dsp_firm->data, sc->dsp_firm->size); else ret = check_dsp_e1(sc->dsp_firm->data, sc->dsp_firm->size); if (ret) { uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n", dsp_name); release_firmware(sc->dsp_firm); sc->dsp_firm = NULL; return -EILSEQ; } return 0; } /* * The uea_load_page() function must be called within a process context */ static void uea_load_page_e1(struct work_struct *work) { struct uea_softc *sc = container_of(work, struct uea_softc, task); u16 pageno = sc->pageno; u16 ovl = sc->ovl; struct block_info_e1 bi; const u8 *p; u8 pagecount, blockcount; u16 blockaddr, blocksize; u32 pageoffset; int i; /* reload firmware when reboot start and it's loaded already */ if (ovl == 0 && pageno == 0) { release_firmware(sc->dsp_firm); sc->dsp_firm = NULL; } if (sc->dsp_firm == NULL && request_dsp(sc) < 0) return; p = sc->dsp_firm->data; pagecount = FW_GET_BYTE(p); p += 1; if (pageno >= pagecount) goto bad1; p += 4 * pageno; pageoffset = get_unaligned_le32(p); if (pageoffset == 0) goto bad1; p = sc->dsp_firm->data + pageoffset; blockcount = FW_GET_BYTE(p); p += 1; uea_dbg(INS_TO_USBDEV(sc), "sending %u blocks for DSP page %u\n", blockcount, pageno); bi.wHdr = cpu_to_le16(UEA_BIHDR); bi.wOvl = cpu_to_le16(ovl); bi.wOvlOffset = cpu_to_le16(ovl | 0x8000); for (i = 0; i < blockcount; i++) { blockaddr = get_unaligned_le16(p); p += 2; blocksize = get_unaligned_le16(p); p += 2; bi.wSize = cpu_to_le16(blocksize); bi.wAddress = cpu_to_le16(blockaddr); bi.wLast = cpu_to_le16((i == blockcount - 1) ? 1 : 0); /* send block info through the IDMA pipe */ if (uea_idma_write(sc, &bi, E1_BLOCK_INFO_SIZE)) goto bad2; /* send block data through the IDMA pipe */ if (uea_idma_write(sc, p, blocksize)) goto bad2; p += blocksize; } return; bad2: uea_err(INS_TO_USBDEV(sc), "sending DSP block %u failed\n", i); return; bad1: uea_err(INS_TO_USBDEV(sc), "invalid DSP page %u requested\n", pageno); } static void __uea_load_page_e4(struct uea_softc *sc, u8 pageno, int boot) { struct block_info_e4 bi; struct block_index *blockidx; struct l1_code *p = (struct l1_code *) sc->dsp_firm->data; u8 blockno = p->page_number_to_block_index[pageno]; bi.wHdr = cpu_to_be16(UEA_BIHDR); bi.bBootPage = boot; bi.bPageNumber = pageno; bi.wReserved = cpu_to_be16(UEA_RESERVED); do { const u8 *blockoffset; unsigned int blocksize; blockidx = &p->page_header[blockno]; blocksize = E4_PAGE_BYTES(blockidx->PageSize); blockoffset = sc->dsp_firm->data + le32_to_cpu( blockidx->PageOffset); bi.dwSize = cpu_to_be32(blocksize); bi.dwAddress = cpu_to_be32(le32_to_cpu(blockidx->PageAddress)); uea_dbg(INS_TO_USBDEV(sc), "sending block %u for DSP page " "%u size %u address %x\n", blockno, pageno, blocksize, le32_to_cpu(blockidx->PageAddress)); /* send block info through the IDMA pipe */ if (uea_idma_write(sc, &bi, E4_BLOCK_INFO_SIZE)) goto bad; /* send block data through the IDMA pipe */ if (uea_idma_write(sc, blockoffset, blocksize)) goto bad; blockno++; } while (blockidx->NotLastBlock); return; bad: uea_err(INS_TO_USBDEV(sc), "sending DSP block %u failed\n", blockno); return; } static void uea_load_page_e4(struct work_struct *work) { struct uea_softc *sc = container_of(work, struct uea_softc, task); u8 pageno = sc->pageno; int i; struct block_info_e4 bi; struct l1_code *p; uea_dbg(INS_TO_USBDEV(sc), "sending DSP page %u\n", pageno); /* reload firmware when reboot start and it's loaded already */ if (pageno == 0) { release_firmware(sc->dsp_firm); sc->dsp_firm = NULL; } if (sc->dsp_firm == NULL && request_dsp(sc) < 0) return; p = (struct l1_code *) sc->dsp_firm->data; if (pageno >= le16_to_cpu(p->page_header[0].PageNumber)) { uea_err(INS_TO_USBDEV(sc), "invalid DSP " "page %u requested\n", pageno); return; } if (pageno != 0) { __uea_load_page_e4(sc, pageno, 0); return; } uea_dbg(INS_TO_USBDEV(sc), "sending Main DSP page %u\n", p->page_header[0].PageNumber); for (i = 0; i < le16_to_cpu(p->page_header[0].PageNumber); i++) { if (E4_IS_BOOT_PAGE(p->page_header[i].PageSize)) __uea_load_page_e4(sc, i, 1); } uea_dbg(INS_TO_USBDEV(sc) , "sending start bi\n"); bi.wHdr = cpu_to_be16(UEA_BIHDR); bi.bBootPage = 0; bi.bPageNumber = 0xff; bi.wReserved = cpu_to_be16(UEA_RESERVED); bi.dwSize = cpu_to_be32(E4_PAGE_BYTES(p->page_header[0].PageSize)); bi.dwAddress = cpu_to_be32(le32_to_cpu(p->page_header[0].PageAddress)); /* send block info through the IDMA pipe */ if (uea_idma_write(sc, &bi, E4_BLOCK_INFO_SIZE)) uea_err(INS_TO_USBDEV(sc), "sending DSP start bi failed\n"); } static inline void wake_up_cmv_ack(struct uea_softc *sc) { BUG_ON(sc->cmv_ack); sc->cmv_ack = 1; wake_up(&sc->sync_q); } static inline int wait_cmv_ack(struct uea_softc *sc) { int ret = uea_wait(sc, sc->cmv_ack , ACK_TIMEOUT); sc->cmv_ack = 0; uea_dbg(INS_TO_USBDEV(sc), "wait_event_timeout : %d ms\n", jiffies_to_msecs(ret)); if (ret < 0) return ret; return (ret == 0) ? -ETIMEDOUT : 0; } #define UCDC_SEND_ENCAPSULATED_COMMAND 0x00 static int uea_request(struct uea_softc *sc, u16 value, u16 index, u16 size, const void *data) { u8 *xfer_buff; int ret = -ENOMEM; xfer_buff = kmemdup(data, size, GFP_KERNEL); if (!xfer_buff) { uea_err(INS_TO_USBDEV(sc), "can't allocate xfer_buff\n"); return ret; } ret = usb_control_msg(sc->usb_dev, usb_sndctrlpipe(sc->usb_dev, 0), UCDC_SEND_ENCAPSULATED_COMMAND, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, xfer_buff, size, CTRL_TIMEOUT); kfree(xfer_buff); if (ret < 0) { uea_err(INS_TO_USBDEV(sc), "usb_control_msg error %d\n", ret); return ret; } if (ret != size) { uea_err(INS_TO_USBDEV(sc), "usb_control_msg send only %d bytes (instead of %d)\n", ret, size); return -EIO; } return 0; } static int uea_cmv_e1(struct uea_softc *sc, u8 function, u32 address, u16 offset, u32 data) { struct cmv_e1 cmv; int ret; uea_enters(INS_TO_USBDEV(sc)); uea_vdbg(INS_TO_USBDEV(sc), "Function : %d-%d, Address : %c%c%c%c, " "offset : 0x%04x, data : 0x%08x\n", E1_FUNCTION_TYPE(function), E1_FUNCTION_SUBTYPE(function), E1_GETSA1(address), E1_GETSA2(address), E1_GETSA3(address), E1_GETSA4(address), offset, data); /* we send a request, but we expect a reply */ sc->cmv_dsc.e1.function = function | 0x2; sc->cmv_dsc.e1.idx++; sc->cmv_dsc.e1.address = address; sc->cmv_dsc.e1.offset = offset; cmv.wPreamble = cpu_to_le16(E1_PREAMBLE); cmv.bDirection = E1_HOSTTOMODEM; cmv.bFunction = function; cmv.wIndex = cpu_to_le16(sc->cmv_dsc.e1.idx); put_unaligned_le32(address, &cmv.dwSymbolicAddress); cmv.wOffsetAddress = cpu_to_le16(offset); put_unaligned_le32(data >> 16 | data << 16, &cmv.dwData); ret = uea_request(sc, UEA_E1_SET_BLOCK, UEA_MPTX_START, sizeof(cmv), &cmv); if (ret < 0) return ret; ret = wait_cmv_ack(sc); uea_leaves(INS_TO_USBDEV(sc)); return ret; } static int uea_cmv_e4(struct uea_softc *sc, u16 function, u16 group, u16 address, u16 offset, u32 data) { struct cmv_e4 cmv; int ret; uea_enters(INS_TO_USBDEV(sc)); memset(&cmv, 0, sizeof(cmv)); uea_vdbg(INS_TO_USBDEV(sc), "Function : %d-%d, Group : 0x%04x, " "Address : 0x%04x, offset : 0x%04x, data : 0x%08x\n", E4_FUNCTION_TYPE(function), E4_FUNCTION_SUBTYPE(function), group, address, offset, data); /* we send a request, but we expect a reply */ sc->cmv_dsc.e4.function = function | (0x1 << 4); sc->cmv_dsc.e4.offset = offset; sc->cmv_dsc.e4.address = address; sc->cmv_dsc.e4.group = group; cmv.wFunction = cpu_to_be16(function); cmv.wGroup = cpu_to_be16(group); cmv.wAddress = cpu_to_be16(address); cmv.wOffset = cpu_to_be16(offset); cmv.dwData[0] = cpu_to_be32(data); ret = uea_request(sc, UEA_E4_SET_BLOCK, UEA_MPTX_START, sizeof(cmv), &cmv); if (ret < 0) return ret; ret = wait_cmv_ack(sc); uea_leaves(INS_TO_USBDEV(sc)); return ret; } static inline int uea_read_cmv_e1(struct uea_softc *sc, u32 address, u16 offset, u32 *data) { int ret = uea_cmv_e1(sc, E1_MAKEFUNCTION(E1_MEMACCESS, E1_REQUESTREAD), address, offset, 0); if (ret < 0) uea_err(INS_TO_USBDEV(sc), "reading cmv failed with error %d\n", ret); else *data = sc->data; return ret; } static inline int uea_read_cmv_e4(struct uea_softc *sc, u8 size, u16 group, u16 address, u16 offset, u32 *data) { int ret = uea_cmv_e4(sc, E4_MAKEFUNCTION(E4_MEMACCESS, E4_REQUESTREAD, size), group, address, offset, 0); if (ret < 0) uea_err(INS_TO_USBDEV(sc), "reading cmv failed with error %d\n", ret); else { *data = sc->data; /* size is in 16-bit word quantities */ if (size > 2) *(data + 1) = sc->data1; } return ret; } static inline int uea_write_cmv_e1(struct uea_softc *sc, u32 address, u16 offset, u32 data) { int ret = uea_cmv_e1(sc, E1_MAKEFUNCTION(E1_MEMACCESS, E1_REQUESTWRITE), address, offset, data); if (ret < 0) uea_err(INS_TO_USBDEV(sc), "writing cmv failed with error %d\n", ret); return ret; } static inline int uea_write_cmv_e4(struct uea_softc *sc, u8 size, u16 group, u16 address, u16 offset, u32 data) { int ret = uea_cmv_e4(sc, E4_MAKEFUNCTION(E4_MEMACCESS, E4_REQUESTWRITE, size), group, address, offset, data); if (ret < 0) uea_err(INS_TO_USBDEV(sc), "writing cmv failed with error %d\n", ret); return ret; } static void uea_set_bulk_timeout(struct uea_softc *sc, u32 dsrate) { int ret; u16 timeout; /* in bulk mode the modem have problem with high rate * changing internal timing could improve things, but the * value is mysterious. * ADI930 don't support it (-EPIPE error). */ if (UEA_CHIP_VERSION(sc) == ADI930 || altsetting[sc->modem_index] > 0 || sc->stats.phy.dsrate == dsrate) return; /* Original timing (1Mbit/s) from ADI (used in windows driver) */ timeout = (dsrate <= 1024*1024) ? 0 : 1; ret = uea_request(sc, UEA_SET_TIMEOUT, timeout, 0, NULL); uea_info(INS_TO_USBDEV(sc), "setting new timeout %d%s\n", timeout, ret < 0 ? " failed" : ""); } /* * Monitor the modem and update the stat * return 0 if everything is ok * return < 0 if an error occurs (-EAGAIN reboot needed) */ static int uea_stat_e1(struct uea_softc *sc) { u32 data; int ret; uea_enters(INS_TO_USBDEV(sc)); data = sc->stats.phy.state; ret = uea_read_cmv_e1(sc, E1_SA_STAT, 0, &sc->stats.phy.state); if (ret < 0) return ret; switch (GET_STATUS(sc->stats.phy.state)) { case 0: /* not yet synchronized */ uea_dbg(INS_TO_USBDEV(sc), "modem not yet synchronized\n"); return 0; case 1: /* initialization */ uea_dbg(INS_TO_USBDEV(sc), "modem initializing\n"); return 0; case 2: /* operational */ uea_vdbg(INS_TO_USBDEV(sc), "modem operational\n"); break; case 3: /* fail ... */ uea_info(INS_TO_USBDEV(sc), "modem synchronization failed" " (may be try other cmv/dsp)\n"); return -EAGAIN; case 4 ... 6: /* test state */ uea_warn(INS_TO_USBDEV(sc), "modem in test mode - not supported\n"); return -EAGAIN; case 7: /* fast-retain ... */ uea_info(INS_TO_USBDEV(sc), "modem in fast-retain mode\n"); return 0; default: uea_err(INS_TO_USBDEV(sc), "modem invalid SW mode %d\n", GET_STATUS(sc->stats.phy.state)); return -EAGAIN; } if (GET_STATUS(data) != 2) { uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_OFF, 0, NULL); uea_info(INS_TO_USBDEV(sc), "modem operational\n"); /* release the dsp firmware as it is not needed until * the next failure */ release_firmware(sc->dsp_firm); sc->dsp_firm = NULL; } /* always update it as atm layer could not be init when we switch to * operational state */ UPDATE_ATM_SIGNAL(ATM_PHY_SIG_FOUND); /* wake up processes waiting for synchronization */ wake_up(&sc->sync_q); ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 2, &sc->stats.phy.flags); if (ret < 0) return ret; sc->stats.phy.mflags |= sc->stats.phy.flags; /* in case of a flags ( for example delineation LOSS (& 0x10)), * we check the status again in order to detect the failure earlier */ if (sc->stats.phy.flags) { uea_dbg(INS_TO_USBDEV(sc), "Stat flag = 0x%x\n", sc->stats.phy.flags); return 0; } ret = uea_read_cmv_e1(sc, E1_SA_RATE, 0, &data); if (ret < 0) return ret; uea_set_bulk_timeout(sc, (data >> 16) * 32); sc->stats.phy.dsrate = (data >> 16) * 32; sc->stats.phy.usrate = (data & 0xffff) * 32; UPDATE_ATM_STAT(link_rate, sc->stats.phy.dsrate * 1000 / 424); ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 23, &data); if (ret < 0) return ret; sc->stats.phy.dsattenuation = (data & 0xff) / 2; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 47, &data); if (ret < 0) return ret; sc->stats.phy.usattenuation = (data & 0xff) / 2; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 25, &sc->stats.phy.dsmargin); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 49, &sc->stats.phy.usmargin); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 51, &sc->stats.phy.rxflow); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 52, &sc->stats.phy.txflow); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 54, &sc->stats.phy.dsunc); if (ret < 0) return ret; /* only for atu-c */ ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 58, &sc->stats.phy.usunc); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 53, &sc->stats.phy.dscorr); if (ret < 0) return ret; /* only for atu-c */ ret = uea_read_cmv_e1(sc, E1_SA_DIAG, 57, &sc->stats.phy.uscorr); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_INFO, 8, &sc->stats.phy.vidco); if (ret < 0) return ret; ret = uea_read_cmv_e1(sc, E1_SA_INFO, 13, &sc->stats.phy.vidcpe); if (ret < 0) return ret; return 0; } static int uea_stat_e4(struct uea_softc *sc) { u32 data; u32 tmp_arr[2]; int ret; uea_enters(INS_TO_USBDEV(sc)); data = sc->stats.phy.state; /* XXX only need to be done before operationnal... */ ret = uea_read_cmv_e4(sc, 1, E4_SA_STAT, 0, 0, &sc->stats.phy.state); if (ret < 0) return ret; switch (sc->stats.phy.state) { case 0x0: /* not yet synchronized */ case 0x1: case 0x3: case 0x4: uea_dbg(INS_TO_USBDEV(sc), "modem not yet " "synchronized\n"); return 0; case 0x5: /* initialization */ case 0x6: case 0x9: case 0xa: uea_dbg(INS_TO_USBDEV(sc), "modem initializing\n"); return 0; case 0x2: /* fail ... */ uea_info(INS_TO_USBDEV(sc), "modem synchronization " "failed (may be try other cmv/dsp)\n"); return -EAGAIN; case 0x7: /* operational */ break; default: uea_warn(INS_TO_USBDEV(sc), "unknown state: %x\n", sc->stats.phy.state); return 0; } if (data != 7) { uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_OFF, 0, NULL); uea_info(INS_TO_USBDEV(sc), "modem operational\n"); /* release the dsp firmware as it is not needed until * the next failure */ release_firmware(sc->dsp_firm); sc->dsp_firm = NULL; } /* always update it as atm layer could not be init when we switch to * operational state */ UPDATE_ATM_SIGNAL(ATM_PHY_SIG_FOUND); /* wake up processes waiting for synchronization */ wake_up(&sc->sync_q); /* TODO improve this state machine : * we need some CMV info : what they do and their unit * we should find the equivalent of eagle3- CMV */ /* check flags */ ret = uea_read_cmv_e4(sc, 1, E4_SA_DIAG, 0, 0, &sc->stats.phy.flags); if (ret < 0) return ret; sc->stats.phy.mflags |= sc->stats.phy.flags; /* in case of a flags ( for example delineation LOSS (& 0x10)), * we check the status again in order to detect the failure earlier */ if (sc->stats.phy.flags) { uea_dbg(INS_TO_USBDEV(sc), "Stat flag = 0x%x\n", sc->stats.phy.flags); if (sc->stats.phy.flags & 1) /* delineation LOSS */ return -EAGAIN; if (sc->stats.phy.flags & 0x4000) /* Reset Flag */ return -EAGAIN; return 0; } /* rate data may be in upper or lower half of 64 bit word, strange */ ret = uea_read_cmv_e4(sc, 4, E4_SA_RATE, 0, 0, tmp_arr); if (ret < 0) return ret; data = (tmp_arr[0]) ? tmp_arr[0] : tmp_arr[1]; sc->stats.phy.usrate = data / 1000; ret = uea_read_cmv_e4(sc, 4, E4_SA_RATE, 1, 0, tmp_arr); if (ret < 0) return ret; data = (tmp_arr[0]) ? tmp_arr[0] : tmp_arr[1]; uea_set_bulk_timeout(sc, data / 1000); sc->stats.phy.dsrate = data / 1000; UPDATE_ATM_STAT(link_rate, sc->stats.phy.dsrate * 1000 / 424); ret = uea_read_cmv_e4(sc, 1, E4_SA_INFO, 68, 1, &data); if (ret < 0) return ret; sc->stats.phy.dsattenuation = data / 10; ret = uea_read_cmv_e4(sc, 1, E4_SA_INFO, 69, 1, &data); if (ret < 0) return ret; sc->stats.phy.usattenuation = data / 10; ret = uea_read_cmv_e4(sc, 1, E4_SA_INFO, 68, 3, &data); if (ret < 0) return ret; sc->stats.phy.dsmargin = data / 2; ret = uea_read_cmv_e4(sc, 1, E4_SA_INFO, 69, 3, &data); if (ret < 0) return ret; sc->stats.phy.usmargin = data / 10; return 0; } static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver) { char file_arr[] = "CMVxy.bin"; char *file; kernel_param_lock(THIS_MODULE); /* set proper name corresponding modem version and line type */ if (cmv_file[sc->modem_index] == NULL) { if (UEA_CHIP_VERSION(sc) == ADI930) file_arr[3] = '9'; else if (UEA_CHIP_VERSION(sc) == EAGLE_IV) file_arr[3] = '4'; else file_arr[3] = 'e'; file_arr[4] = IS_ISDN(sc) ? 'i' : 'p'; file = file_arr; } else file = cmv_file[sc->modem_index]; strcpy(cmv_name, FW_DIR); strlcat(cmv_name, file, UEA_FW_NAME_MAX); if (ver == 2) strlcat(cmv_name, ".v2", UEA_FW_NAME_MAX); kernel_param_unlock(THIS_MODULE); } static int request_cmvs_old(struct uea_softc *sc, void **cmvs, const struct firmware **fw) { int ret, size; u8 *data; char cmv_name[UEA_FW_NAME_MAX]; /* 30 bytes stack variable */ cmvs_file_name(sc, cmv_name, 1); ret = request_firmware(fw, cmv_name, &sc->usb_dev->dev); if (ret < 0) { uea_err(INS_TO_USBDEV(sc), "requesting firmware %s failed with error %d\n", cmv_name, ret); return ret; } data = (u8 *) (*fw)->data; size = (*fw)->size; if (size < 1) goto err_fw_corrupted; if (size != *data * sizeof(struct uea_cmvs_v1) + 1) goto err_fw_corrupted; *cmvs = (void *)(data + 1); return *data; err_fw_corrupted: uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n", cmv_name); release_firmware(*fw); return -EILSEQ; } static int request_cmvs(struct uea_softc *sc, void **cmvs, const struct firmware **fw, int *ver) { int ret, size; u32 crc; u8 *data; char cmv_name[UEA_FW_NAME_MAX]; /* 30 bytes stack variable */ cmvs_file_name(sc, cmv_name, 2); ret = request_firmware(fw, cmv_name, &sc->usb_dev->dev); if (ret < 0) { /* if caller can handle old version, try to provide it */ if (*ver == 1) { uea_warn(INS_TO_USBDEV(sc), "requesting " "firmware %s failed, " "try to get older cmvs\n", cmv_name); return request_cmvs_old(sc, cmvs, fw); } uea_err(INS_TO_USBDEV(sc), "requesting firmware %s failed with error %d\n", cmv_name, ret); return ret; } size = (*fw)->size; data = (u8 *) (*fw)->data; if (size < 4 || strncmp(data, "cmv2", 4) != 0) { if (*ver == 1) { uea_warn(INS_TO_USBDEV(sc), "firmware %s is corrupted," " try to get older cmvs\n", cmv_name); release_firmware(*fw); return request_cmvs_old(sc, cmvs, fw); } goto err_fw_corrupted; } *ver = 2; data += 4; size -= 4; if (size < 5) goto err_fw_corrupted; crc = get_unaligned_le32(data); data += 4; size -= 4; if (crc32_be(0, data, size) != crc) goto err_fw_corrupted; if (size != *data * sizeof(struct uea_cmvs_v2) + 1) goto err_fw_corrupted; *cmvs = (void *) (data + 1); return *data; err_fw_corrupted: uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n", cmv_name); release_firmware(*fw); return -EILSEQ; } static int uea_send_cmvs_e1(struct uea_softc *sc) { int i, ret, len; void *cmvs_ptr; const struct firmware *cmvs_fw; int ver = 1; /* we can handle v1 cmv firmware version; */ /* Enter in R-IDLE (cmv) until instructed otherwise */ ret = uea_write_cmv_e1(sc, E1_SA_CNTL, 0, 1); if (ret < 0) return ret; /* Dump firmware version */ ret = uea_read_cmv_e1(sc, E1_SA_INFO, 10, &sc->stats.phy.firmid); if (ret < 0) return ret; uea_info(INS_TO_USBDEV(sc), "ATU-R firmware version : %x\n", sc->stats.phy.firmid); /* get options */ ret = len = request_cmvs(sc, &cmvs_ptr, &cmvs_fw, &ver); if (ret < 0) return ret; /* send options */ if (ver == 1) { struct uea_cmvs_v1 *cmvs_v1 = cmvs_ptr; uea_warn(INS_TO_USBDEV(sc), "use deprecated cmvs version, " "please update your firmware\n"); for (i = 0; i < len; i++) { ret = uea_write_cmv_e1(sc, get_unaligned_le32(&cmvs_v1[i].address), get_unaligned_le16(&cmvs_v1[i].offset), get_unaligned_le32(&cmvs_v1[i].data)); if (ret < 0) goto out; } } else if (ver == 2) { struct uea_cmvs_v2 *cmvs_v2 = cmvs_ptr; for (i = 0; i < len; i++) { ret = uea_write_cmv_e1(sc, get_unaligned_le32(&cmvs_v2[i].address), (u16) get_unaligned_le32(&cmvs_v2[i].offset), get_unaligned_le32(&cmvs_v2[i].data)); if (ret < 0) goto out; } } else { /* This really should not happen */ uea_err(INS_TO_USBDEV(sc), "bad cmvs version %d\n", ver); goto out; } /* Enter in R-ACT-REQ */ ret = uea_write_cmv_e1(sc, E1_SA_CNTL, 0, 2); uea_vdbg(INS_TO_USBDEV(sc), "Entering in R-ACT-REQ state\n"); uea_info(INS_TO_USBDEV(sc), "modem started, waiting " "synchronization...\n"); out: release_firmware(cmvs_fw); return ret; } static int uea_send_cmvs_e4(struct uea_softc *sc) { int i, ret, len; void *cmvs_ptr; const struct firmware *cmvs_fw; int ver = 2; /* we can only handle v2 cmv firmware version; */ /* Enter in R-IDLE (cmv) until instructed otherwise */ ret = uea_write_cmv_e4(sc, 1, E4_SA_CNTL, 0, 0, 1); if (ret < 0) return ret; /* Dump firmware version */ /* XXX don't read the 3th byte as it is always 6 */ ret = uea_read_cmv_e4(sc, 2, E4_SA_INFO, 55, 0, &sc->stats.phy.firmid); if (ret < 0) return ret; uea_info(INS_TO_USBDEV(sc), "ATU-R firmware version : %x\n", sc->stats.phy.firmid); /* get options */ ret = len = request_cmvs(sc, &cmvs_ptr, &cmvs_fw, &ver); if (ret < 0) return ret; /* send options */ if (ver == 2) { struct uea_cmvs_v2 *cmvs_v2 = cmvs_ptr; for (i = 0; i < len; i++) { ret = uea_write_cmv_e4(sc, 1, get_unaligned_le32(&cmvs_v2[i].group), get_unaligned_le32(&cmvs_v2[i].address), get_unaligned_le32(&cmvs_v2[i].offset), get_unaligned_le32(&cmvs_v2[i].data)); if (ret < 0) goto out; } } else { /* This really should not happen */ uea_err(INS_TO_USBDEV(sc), "bad cmvs version %d\n", ver); goto out; } /* Enter in R-ACT-REQ */ ret = uea_write_cmv_e4(sc, 1, E4_SA_CNTL, 0, 0, 2); uea_vdbg(INS_TO_USBDEV(sc), "Entering in R-ACT-REQ state\n"); uea_info(INS_TO_USBDEV(sc), "modem started, waiting " "synchronization...\n"); out: release_firmware(cmvs_fw); return ret; } /* Start boot post firmware modem: * - send reset commands through usb control pipe * - start workqueue for DSP loading * - send CMV options to modem */ static int uea_start_reset(struct uea_softc *sc) { u16 zero = 0; /* ;-) */ int ret; uea_enters(INS_TO_USBDEV(sc)); uea_info(INS_TO_USBDEV(sc), "(re)booting started\n"); /* mask interrupt */ sc->booting = 1; /* We need to set this here because, a ack timeout could have occurred, * but before we start the reboot, the ack occurs and set this to 1. * So we will failed to wait Ready CMV. */ sc->cmv_ack = 0; UPDATE_ATM_SIGNAL(ATM_PHY_SIG_LOST); /* reset statistics */ memset(&sc->stats, 0, sizeof(struct uea_stats)); /* tell the modem that we want to boot in IDMA mode */ uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_ON, 0, NULL); uea_request(sc, UEA_SET_MODE, UEA_BOOT_IDMA, 0, NULL); /* enter reset mode */ uea_request(sc, UEA_SET_MODE, UEA_START_RESET, 0, NULL); /* original driver use 200ms, but windows driver use 100ms */ ret = uea_wait(sc, 0, msecs_to_jiffies(100)); if (ret < 0) return ret; /* leave reset mode */ uea_request(sc, UEA_SET_MODE, UEA_END_RESET, 0, NULL); if (UEA_CHIP_VERSION(sc) != EAGLE_IV) { /* clear tx and rx mailboxes */ uea_request(sc, UEA_SET_2183_DATA, UEA_MPTX_MAILBOX, 2, &zero); uea_request(sc, UEA_SET_2183_DATA, UEA_MPRX_MAILBOX, 2, &zero); uea_request(sc, UEA_SET_2183_DATA, UEA_SWAP_MAILBOX, 2, &zero); } ret = uea_wait(sc, 0, msecs_to_jiffies(1000)); if (ret < 0) return ret; if (UEA_CHIP_VERSION(sc) == EAGLE_IV) sc->cmv_dsc.e4.function = E4_MAKEFUNCTION(E4_ADSLDIRECTIVE, E4_MODEMREADY, 1); else sc->cmv_dsc.e1.function = E1_MAKEFUNCTION(E1_ADSLDIRECTIVE, E1_MODEMREADY); /* demask interrupt */ sc->booting = 0; /* start loading DSP */ sc->pageno = 0; sc->ovl = 0; schedule_work(&sc->task); /* wait for modem ready CMV */ ret = wait_cmv_ack(sc); if (ret < 0) return ret; uea_vdbg(INS_TO_USBDEV(sc), "Ready CMV received\n"); ret = sc->send_cmvs(sc); if (ret < 0) return ret; sc->reset = 0; uea_leaves(INS_TO_USBDEV(sc)); return ret; } /* * In case of an error wait 1s before rebooting the modem * if the modem don't request reboot (-EAGAIN). * Monitor the modem every 1s. */ static int uea_kthread(void *data) { struct uea_softc *sc = data; int ret = -EAGAIN; set_freezable(); uea_enters(INS_TO_USBDEV(sc)); while (!kthread_should_stop()) { if (ret < 0 || sc->reset) ret = uea_start_reset(sc); if (!ret) ret = sc->stat(sc); if (ret != -EAGAIN) uea_wait(sc, 0, msecs_to_jiffies(1000)); } uea_leaves(INS_TO_USBDEV(sc)); return ret; } /* Load second usb firmware for ADI930 chip */ static int load_XILINX_firmware(struct uea_softc *sc) { const struct firmware *fw_entry; int ret, size, u, ln; const u8 *pfw; u8 value; char *fw_name = FPGA930_FIRMWARE; uea_enters(INS_TO_USBDEV(sc)); ret = request_firmware(&fw_entry, fw_name, &sc->usb_dev->dev); if (ret) { uea_err(INS_TO_USBDEV(sc), "firmware %s is not available\n", fw_name); goto err0; } pfw = fw_entry->data; size = fw_entry->size; if (size != 0x577B) { uea_err(INS_TO_USBDEV(sc), "firmware %s is corrupted\n", fw_name); ret = -EILSEQ; goto err1; } for (u = 0; u < size; u += ln) { ln = min(size - u, 64); ret = uea_request(sc, 0xe, 0, ln, pfw + u); if (ret < 0) { uea_err(INS_TO_USBDEV(sc), "elsa download data failed (%d)\n", ret); goto err1; } } /* finish to send the fpga */ ret = uea_request(sc, 0xe, 1, 0, NULL); if (ret < 0) { uea_err(INS_TO_USBDEV(sc), "elsa download data failed (%d)\n", ret); goto err1; } /* Tell the modem we finish : de-assert reset */ value = 0; ret = uea_send_modem_cmd(sc->usb_dev, 0xe, 1, &value); if (ret < 0) uea_err(sc->usb_dev, "elsa de-assert failed with error" " %d\n", ret); err1: release_firmware(fw_entry); err0: uea_leaves(INS_TO_USBDEV(sc)); return ret; } /* The modem send us an ack. First with check if it right */ static void uea_dispatch_cmv_e1(struct uea_softc *sc, struct intr_pkt *intr) { struct cmv_dsc_e1 *dsc = &sc->cmv_dsc.e1; struct cmv_e1 *cmv = &intr->u.e1.s2.cmv; uea_enters(INS_TO_USBDEV(sc)); if (le16_to_cpu(cmv->wPreamble) != E1_PREAMBLE) goto bad1; if (cmv->bDirection != E1_MODEMTOHOST) goto bad1; /* FIXME : ADI930 reply wrong preamble (func = 2, sub = 2) to * the first MEMACCESS cmv. Ignore it... */ if (cmv->bFunction != dsc->function) { if (UEA_CHIP_VERSION(sc) == ADI930 && cmv->bFunction == E1_MAKEFUNCTION(2, 2)) { cmv->wIndex = cpu_to_le16(dsc->idx); put_unaligned_le32(dsc->address, &cmv->dwSymbolicAddress); cmv->wOffsetAddress = cpu_to_le16(dsc->offset); } else goto bad2; } if (cmv->bFunction == E1_MAKEFUNCTION(E1_ADSLDIRECTIVE, E1_MODEMREADY)) { wake_up_cmv_ack(sc); uea_leaves(INS_TO_USBDEV(sc)); return; } /* in case of MEMACCESS */ if (le16_to_cpu(cmv->wIndex) != dsc->idx || get_unaligned_le32(&cmv->dwSymbolicAddress) != dsc->address || le16_to_cpu(cmv->wOffsetAddress) != dsc->offset) goto bad2; sc->data = get_unaligned_le32(&cmv->dwData); sc->data = sc->data << 16 | sc->data >> 16; wake_up_cmv_ack(sc); uea_leaves(INS_TO_USBDEV(sc)); return; bad2: uea_err(INS_TO_USBDEV(sc), "unexpected cmv received, " "Function : %d, Subfunction : %d\n", E1_FUNCTION_TYPE(cmv->bFunction), E1_FUNCTION_SUBTYPE(cmv->bFunction)); uea_leaves(INS_TO_USBDEV(sc)); return; bad1: uea_err(INS_TO_USBDEV(sc), "invalid cmv received, " "wPreamble %d, bDirection %d\n", le16_to_cpu(cmv->wPreamble), cmv->bDirection); uea_leaves(INS_TO_USBDEV(sc)); } /* The modem send us an ack. First with check if it right */ static void uea_dispatch_cmv_e4(struct uea_softc *sc, struct intr_pkt *intr) { struct cmv_dsc_e4 *dsc = &sc->cmv_dsc.e4; struct cmv_e4 *cmv = &intr->u.e4.s2.cmv; uea_enters(INS_TO_USBDEV(sc)); uea_dbg(INS_TO_USBDEV(sc), "cmv %x %x %x %x %x %x\n", be16_to_cpu(cmv->wGroup), be16_to_cpu(cmv->wFunction), be16_to_cpu(cmv->wOffset), be16_to_cpu(cmv->wAddress), be32_to_cpu(cmv->dwData[0]), be32_to_cpu(cmv->dwData[1])); if (be16_to_cpu(cmv->wFunction) != dsc->function) goto bad2; if (be16_to_cpu(cmv->wFunction) == E4_MAKEFUNCTION(E4_ADSLDIRECTIVE, E4_MODEMREADY, 1)) { wake_up_cmv_ack(sc); uea_leaves(INS_TO_USBDEV(sc)); return; } /* in case of MEMACCESS */ if (be16_to_cpu(cmv->wOffset) != dsc->offset || be16_to_cpu(cmv->wGroup) != dsc->group || be16_to_cpu(cmv->wAddress) != dsc->address) goto bad2; sc->data = be32_to_cpu(cmv->dwData[0]); sc->data1 = be32_to_cpu(cmv->dwData[1]); wake_up_cmv_ack(sc); uea_leaves(INS_TO_USBDEV(sc)); return; bad2: uea_err(INS_TO_USBDEV(sc), "unexpected cmv received, " "Function : %d, Subfunction : %d\n", E4_FUNCTION_TYPE(cmv->wFunction), E4_FUNCTION_SUBTYPE(cmv->wFunction)); uea_leaves(INS_TO_USBDEV(sc)); return; } static void uea_schedule_load_page_e1(struct uea_softc *sc, struct intr_pkt *intr) { sc->pageno = intr->e1_bSwapPageNo; sc->ovl = intr->e1_bOvl >> 4 | intr->e1_bOvl << 4; schedule_work(&sc->task); } static void uea_schedule_load_page_e4(struct uea_softc *sc, struct intr_pkt *intr) { sc->pageno = intr->e4_bSwapPageNo; schedule_work(&sc->task); } /* * interrupt handler */ static void uea_intr(struct urb *urb) { struct uea_softc *sc = urb->context; struct intr_pkt *intr = urb->transfer_buffer; int status = urb->status; uea_enters(INS_TO_USBDEV(sc)); if (unlikely(status < 0)) { uea_err(INS_TO_USBDEV(sc), "uea_intr() failed with %d\n", status); return; } /* device-to-host interrupt */ if (intr->bType != 0x08 || sc->booting) { uea_err(INS_TO_USBDEV(sc), "wrong interrupt\n"); goto resubmit; } switch (le16_to_cpu(intr->wInterrupt)) { case INT_LOADSWAPPAGE: sc->schedule_load_page(sc, intr); break; case INT_INCOMINGCMV: sc->dispatch_cmv(sc, intr); break; default: uea_err(INS_TO_USBDEV(sc), "unknown interrupt %u\n", le16_to_cpu(intr->wInterrupt)); } resubmit: usb_submit_urb(sc->urb_int, GFP_ATOMIC); } /* * Start the modem : init the data and start kernel thread */ static int uea_boot(struct uea_softc *sc, struct usb_interface *intf) { struct intr_pkt *intr; int ret = -ENOMEM; int size; uea_enters(INS_TO_USBDEV(sc)); if (UEA_CHIP_VERSION(sc) == EAGLE_IV) { size = E4_INTR_PKT_SIZE; sc->dispatch_cmv = uea_dispatch_cmv_e4; sc->schedule_load_page = uea_schedule_load_page_e4; sc->stat = uea_stat_e4; sc->send_cmvs = uea_send_cmvs_e4; INIT_WORK(&sc->task, uea_load_page_e4); } else { size = E1_INTR_PKT_SIZE; sc->dispatch_cmv = uea_dispatch_cmv_e1; sc->schedule_load_page = uea_schedule_load_page_e1; sc->stat = uea_stat_e1; sc->send_cmvs = uea_send_cmvs_e1; INIT_WORK(&sc->task, uea_load_page_e1); } init_waitqueue_head(&sc->sync_q); if (UEA_CHIP_VERSION(sc) == ADI930) load_XILINX_firmware(sc); if (intf->cur_altsetting->desc.bNumEndpoints < 1) { ret = -ENODEV; goto err0; } intr = kmalloc(size, GFP_KERNEL); if (!intr) goto err0; sc->urb_int = usb_alloc_urb(0, GFP_KERNEL); if (!sc->urb_int) goto err1; usb_fill_int_urb(sc->urb_int, sc->usb_dev, usb_rcvintpipe(sc->usb_dev, UEA_INTR_PIPE), intr, size, uea_intr, sc, intf->cur_altsetting->endpoint[0].desc.bInterval); ret = usb_submit_urb(sc->urb_int, GFP_KERNEL); if (ret < 0) { uea_err(INS_TO_USBDEV(sc), "urb submission failed with error %d\n", ret); goto err1; } /* Create worker thread, but don't start it here. Start it after * all usbatm generic initialization is done. */ sc->kthread = kthread_create(uea_kthread, sc, "ueagle-atm"); if (IS_ERR(sc->kthread)) { uea_err(INS_TO_USBDEV(sc), "failed to create thread\n"); ret = PTR_ERR(sc->kthread); goto err2; } uea_leaves(INS_TO_USBDEV(sc)); return 0; err2: usb_kill_urb(sc->urb_int); err1: usb_free_urb(sc->urb_int); sc->urb_int = NULL; kfree(intr); err0: uea_leaves(INS_TO_USBDEV(sc)); return ret; } /* * Stop the modem : kill kernel thread and free data */ static void uea_stop(struct uea_softc *sc) { int ret; uea_enters(INS_TO_USBDEV(sc)); ret = kthread_stop(sc->kthread); uea_dbg(INS_TO_USBDEV(sc), "kthread finish with status %d\n", ret); uea_request(sc, UEA_SET_MODE, UEA_LOOPBACK_ON, 0, NULL); usb_kill_urb(sc->urb_int); kfree(sc->urb_int->transfer_buffer); usb_free_urb(sc->urb_int); /* flush the work item, when no one can schedule it */ flush_work(&sc->task); release_firmware(sc->dsp_firm); uea_leaves(INS_TO_USBDEV(sc)); } /* syfs interface */ static struct uea_softc *dev_to_uea(struct device *dev) { struct usb_interface *intf; struct usbatm_data *usbatm; intf = to_usb_interface(dev); if (!intf) return NULL; usbatm = usb_get_intfdata(intf); if (!usbatm) return NULL; return usbatm->driver_data; } static ssize_t stat_status_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret = -ENODEV; struct uea_softc *sc; mutex_lock(&uea_mutex); sc = dev_to_uea(dev); if (!sc) goto out; ret = sysfs_emit(buf, "%08x\n", sc->stats.phy.state); out: mutex_unlock(&uea_mutex); return ret; } static ssize_t stat_status_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int ret = -ENODEV; struct uea_softc *sc; mutex_lock(&uea_mutex); sc = dev_to_uea(dev); if (!sc) goto out; sc->reset = 1; ret = count; out: mutex_unlock(&uea_mutex); return ret; } static DEVICE_ATTR_RW(stat_status); static ssize_t stat_human_status_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret = -ENODEV; int modem_state; struct uea_softc *sc; mutex_lock(&uea_mutex); sc = dev_to_uea(dev); if (!sc) goto out; if (UEA_CHIP_VERSION(sc) == EAGLE_IV) { switch (sc->stats.phy.state) { case 0x0: /* not yet synchronized */ case 0x1: case 0x3: case 0x4: modem_state = 0; break; case 0x5: /* initialization */ case 0x6: case 0x9: case 0xa: modem_state = 1; break; case 0x7: /* operational */ modem_state = 2; break; case 0x2: /* fail ... */ modem_state = 3; break; default: /* unknown */ modem_state = 4; break; } } else modem_state = GET_STATUS(sc->stats.phy.state); switch (modem_state) { case 0: ret = sysfs_emit(buf, "Modem is booting\n"); break; case 1: ret = sysfs_emit(buf, "Modem is initializing\n"); break; case 2: ret = sysfs_emit(buf, "Modem is operational\n"); break; case 3: ret = sysfs_emit(buf, "Modem synchronization failed\n"); break; default: ret = sysfs_emit(buf, "Modem state is unknown\n"); break; } out: mutex_unlock(&uea_mutex); return ret; } static DEVICE_ATTR_RO(stat_human_status); static ssize_t stat_delin_show(struct device *dev, struct device_attribute *attr, char *buf) { int ret = -ENODEV; struct uea_softc *sc; char *delin = "GOOD"; mutex_lock(&uea_mutex); sc = dev_to_uea(dev); if (!sc) goto out; if (UEA_CHIP_VERSION(sc) == EAGLE_IV) { if (sc->stats.phy.flags & 0x4000) delin = "RESET"; else if (sc->stats.phy.flags & 0x0001) delin = "LOSS"; } else { if (sc->stats.phy.flags & 0x0C00) delin = "ERROR"; else if (sc->stats.phy.flags & 0x0030) delin = "LOSS"; } ret = sysfs_emit(buf, "%s\n", delin); out: mutex_unlock(&uea_mutex); return ret; } static DEVICE_ATTR_RO(stat_delin); #define UEA_ATTR(name, reset) \ \ static ssize_t stat_##name##_show(struct device *dev, \ struct device_attribute *attr, char *buf) \ { \ int ret = -ENODEV; \ struct uea_softc *sc; \ \ mutex_lock(&uea_mutex); \ sc = dev_to_uea(dev); \ if (!sc) \ goto out; \ ret = sysfs_emit(buf, "%08x\n", sc->stats.phy.name); \ if (reset) \ sc->stats.phy.name = 0; \ out: \ mutex_unlock(&uea_mutex); \ return ret; \ } \ \ static DEVICE_ATTR_RO(stat_##name) UEA_ATTR(mflags, 1); UEA_ATTR(vidcpe, 0); UEA_ATTR(usrate, 0); UEA_ATTR(dsrate, 0); UEA_ATTR(usattenuation, 0); UEA_ATTR(dsattenuation, 0); UEA_ATTR(usmargin, 0); UEA_ATTR(dsmargin, 0); UEA_ATTR(txflow, 0); UEA_ATTR(rxflow, 0); UEA_ATTR(uscorr, 0); UEA_ATTR(dscorr, 0); UEA_ATTR(usunc, 0); UEA_ATTR(dsunc, 0); UEA_ATTR(firmid, 0); /* Retrieve the device End System Identifier (MAC) */ static int uea_getesi(struct uea_softc *sc, u_char *esi) { unsigned char mac_str[2 * ETH_ALEN + 1]; int i; if (usb_string (sc->usb_dev, sc->usb_dev->descriptor.iSerialNumber, mac_str, sizeof(mac_str)) != 2 * ETH_ALEN) return 1; for (i = 0; i < ETH_ALEN; i++) esi[i] = hex_to_bin(mac_str[2 * i]) * 16 + hex_to_bin(mac_str[2 * i + 1]); return 0; } /* ATM stuff */ static int uea_atm_open(struct usbatm_data *usbatm, struct atm_dev *atm_dev) { struct uea_softc *sc = usbatm->driver_data; return uea_getesi(sc, atm_dev->esi); } static int uea_heavy(struct usbatm_data *usbatm, struct usb_interface *intf) { struct uea_softc *sc = usbatm->driver_data; wait_event_interruptible(sc->sync_q, IS_OPERATIONAL(sc)); return 0; } static int claim_interface(struct usb_device *usb_dev, struct usbatm_data *usbatm, int ifnum) { int ret; struct usb_interface *intf = usb_ifnum_to_if(usb_dev, ifnum); if (!intf) { uea_err(usb_dev, "interface %d not found\n", ifnum); return -ENODEV; } ret = usb_driver_claim_interface(&uea_driver, intf, usbatm); if (ret != 0) uea_err(usb_dev, "can't claim interface %d, error %d\n", ifnum, ret); return ret; } static struct attribute *uea_attrs[] = { &dev_attr_stat_status.attr, &dev_attr_stat_mflags.attr, &dev_attr_stat_human_status.attr, &dev_attr_stat_delin.attr, &dev_attr_stat_vidcpe.attr, &dev_attr_stat_usrate.attr, &dev_attr_stat_dsrate.attr, &dev_attr_stat_usattenuation.attr, &dev_attr_stat_dsattenuation.attr, &dev_attr_stat_usmargin.attr, &dev_attr_stat_dsmargin.attr, &dev_attr_stat_txflow.attr, &dev_attr_stat_rxflow.attr, &dev_attr_stat_uscorr.attr, &dev_attr_stat_dscorr.attr, &dev_attr_stat_usunc.attr, &dev_attr_stat_dsunc.attr, &dev_attr_stat_firmid.attr, NULL, }; ATTRIBUTE_GROUPS(uea); static int uea_bind(struct usbatm_data *usbatm, struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *usb = interface_to_usbdev(intf); struct uea_softc *sc; int ret, ifnum = intf->altsetting->desc.bInterfaceNumber; unsigned int alt; uea_enters(usb); /* interface 0 is for firmware/monitoring */ if (ifnum != UEA_INTR_IFACE_NO) return -ENODEV; usbatm->flags = (sync_wait[modem_index] ? 0 : UDSL_SKIP_HEAVY_INIT); /* interface 1 is for outbound traffic */ ret = claim_interface(usb, usbatm, UEA_US_IFACE_NO); if (ret < 0) return ret; /* ADI930 has only 2 interfaces and inbound traffic is on interface 1 */ if (UEA_CHIP_VERSION(id) != ADI930) { /* interface 2 is for inbound traffic */ ret = claim_interface(usb, usbatm, UEA_DS_IFACE_NO); if (ret < 0) return ret; } sc = kzalloc(sizeof(struct uea_softc), GFP_KERNEL); if (!sc) return -ENOMEM; sc->usb_dev = usb; usbatm->driver_data = sc; sc->usbatm = usbatm; sc->modem_index = (modem_index < NB_MODEM) ? modem_index++ : 0; sc->driver_info = id->driver_info; /* first try to use module parameter */ if (annex[sc->modem_index] == 1) sc->annex = ANNEXA; else if (annex[sc->modem_index] == 2) sc->annex = ANNEXB; /* try to autodetect annex */ else if (sc->driver_info & AUTO_ANNEX_A) sc->annex = ANNEXA; else if (sc->driver_info & AUTO_ANNEX_B) sc->annex = ANNEXB; else sc->annex = (le16_to_cpu (sc->usb_dev->descriptor.bcdDevice) & 0x80) ? ANNEXB : ANNEXA; alt = altsetting[sc->modem_index]; /* ADI930 don't support iso */ if (UEA_CHIP_VERSION(id) != ADI930 && alt > 0) { if (alt <= 8 && usb_set_interface(usb, UEA_DS_IFACE_NO, alt) == 0) { uea_dbg(usb, "set alternate %u for 2 interface\n", alt); uea_info(usb, "using iso mode\n"); usbatm->flags |= UDSL_USE_ISOC | UDSL_IGNORE_EILSEQ; } else { uea_err(usb, "setting alternate %u failed for " "2 interface, using bulk mode\n", alt); } } ret = uea_boot(sc, intf); if (ret < 0) goto error; return 0; error: kfree(sc); return ret; } static void uea_unbind(struct usbatm_data *usbatm, struct usb_interface *intf) { struct uea_softc *sc = usbatm->driver_data; uea_stop(sc); kfree(sc); } static struct usbatm_driver uea_usbatm_driver = { .driver_name = "ueagle-atm", .bind = uea_bind, .atm_start = uea_atm_open, .unbind = uea_unbind, .heavy_init = uea_heavy, .bulk_in = UEA_BULK_DATA_PIPE, .bulk_out = UEA_BULK_DATA_PIPE, .isoc_in = UEA_ISO_DATA_PIPE, }; static int uea_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *usb = interface_to_usbdev(intf); int ret; uea_enters(usb); uea_info(usb, "ADSL device founded vid (%#X) pid (%#X) Rev (%#X): %s\n", le16_to_cpu(usb->descriptor.idVendor), le16_to_cpu(usb->descriptor.idProduct), le16_to_cpu(usb->descriptor.bcdDevice), chip_name[UEA_CHIP_VERSION(id)]); usb_reset_device(usb); if (UEA_IS_PREFIRM(id)) return uea_load_firmware(usb, UEA_CHIP_VERSION(id)); ret = usbatm_usb_probe(intf, id, &uea_usbatm_driver); if (ret == 0) { struct usbatm_data *usbatm = usb_get_intfdata(intf); struct uea_softc *sc = usbatm->driver_data; /* Ensure carrier is initialized to off as early as possible */ UPDATE_ATM_SIGNAL(ATM_PHY_SIG_LOST); /* Only start the worker thread when all init is done */ wake_up_process(sc->kthread); } return ret; } static void uea_disconnect(struct usb_interface *intf) { struct usb_device *usb = interface_to_usbdev(intf); int ifnum = intf->altsetting->desc.bInterfaceNumber; uea_enters(usb); /* ADI930 has 2 interfaces and eagle 3 interfaces. * Pre-firmware device has one interface */ if (usb->config->desc.bNumInterfaces != 1 && ifnum == 0) { mutex_lock(&uea_mutex); usbatm_usb_disconnect(intf); mutex_unlock(&uea_mutex); uea_info(usb, "ADSL device removed\n"); } uea_leaves(usb); } /* * List of supported VID/PID */ static const struct usb_device_id uea_ids[] = { {USB_DEVICE(ANALOG_VID, ADI930_PID_PREFIRM), .driver_info = ADI930 | PREFIRM}, {USB_DEVICE(ANALOG_VID, ADI930_PID_PSTFIRM), .driver_info = ADI930 | PSTFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_I_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_I_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_II_PID_PREFIRM), .driver_info = EAGLE_II | PREFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_II_PID_PSTFIRM), .driver_info = EAGLE_II | PSTFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_IIC_PID_PREFIRM), .driver_info = EAGLE_II | PREFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_IIC_PID_PSTFIRM), .driver_info = EAGLE_II | PSTFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_III_PID_PREFIRM), .driver_info = EAGLE_III | PREFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_III_PID_PSTFIRM), .driver_info = EAGLE_III | PSTFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_IV_PID_PREFIRM), .driver_info = EAGLE_IV | PREFIRM}, {USB_DEVICE(ANALOG_VID, EAGLE_IV_PID_PSTFIRM), .driver_info = EAGLE_IV | PSTFIRM}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_I_A_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_I_A_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM | AUTO_ANNEX_A}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_I_B_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_I_B_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM | AUTO_ANNEX_B}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_II_A_PID_PREFIRM), .driver_info = EAGLE_II | PREFIRM}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_II_A_PID_PSTFIRM), .driver_info = EAGLE_II | PSTFIRM | AUTO_ANNEX_A}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_II_B_PID_PREFIRM), .driver_info = EAGLE_II | PREFIRM}, {USB_DEVICE(DEVOLO_VID, DEVOLO_EAGLE_II_B_PID_PSTFIRM), .driver_info = EAGLE_II | PSTFIRM | AUTO_ANNEX_B}, {USB_DEVICE(ELSA_VID, ELSA_PID_PREFIRM), .driver_info = ADI930 | PREFIRM}, {USB_DEVICE(ELSA_VID, ELSA_PID_PSTFIRM), .driver_info = ADI930 | PSTFIRM}, {USB_DEVICE(ELSA_VID, ELSA_PID_A_PREFIRM), .driver_info = ADI930 | PREFIRM}, {USB_DEVICE(ELSA_VID, ELSA_PID_A_PSTFIRM), .driver_info = ADI930 | PSTFIRM | AUTO_ANNEX_A}, {USB_DEVICE(ELSA_VID, ELSA_PID_B_PREFIRM), .driver_info = ADI930 | PREFIRM}, {USB_DEVICE(ELSA_VID, ELSA_PID_B_PSTFIRM), .driver_info = ADI930 | PSTFIRM | AUTO_ANNEX_B}, {USB_DEVICE(USR_VID, MILLER_A_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(USR_VID, MILLER_A_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM | AUTO_ANNEX_A}, {USB_DEVICE(USR_VID, MILLER_B_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(USR_VID, MILLER_B_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM | AUTO_ANNEX_B}, {USB_DEVICE(USR_VID, HEINEKEN_A_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(USR_VID, HEINEKEN_A_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM | AUTO_ANNEX_A}, {USB_DEVICE(USR_VID, HEINEKEN_B_PID_PREFIRM), .driver_info = EAGLE_I | PREFIRM}, {USB_DEVICE(USR_VID, HEINEKEN_B_PID_PSTFIRM), .driver_info = EAGLE_I | PSTFIRM | AUTO_ANNEX_B}, {} }; /* * USB driver descriptor */ static struct usb_driver uea_driver = { .name = "ueagle-atm", .id_table = uea_ids, .probe = uea_probe, .disconnect = uea_disconnect, .dev_groups = uea_groups, }; MODULE_DEVICE_TABLE(usb, uea_ids); module_usb_driver(uea_driver); MODULE_AUTHOR("Damien Bergamini/Matthieu Castet/Stanislaw W. Gruszka"); MODULE_DESCRIPTION("ADI 930/Eagle USB ADSL Modem driver"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_FIRMWARE(EAGLE_FIRMWARE); MODULE_FIRMWARE(ADI930_FIRMWARE); MODULE_FIRMWARE(EAGLE_I_FIRMWARE); MODULE_FIRMWARE(EAGLE_II_FIRMWARE); MODULE_FIRMWARE(EAGLE_III_FIRMWARE); MODULE_FIRMWARE(EAGLE_IV_FIRMWARE); MODULE_FIRMWARE(DSP4I_FIRMWARE); MODULE_FIRMWARE(DSP4P_FIRMWARE); MODULE_FIRMWARE(DSP9I_FIRMWARE); MODULE_FIRMWARE(DSP9P_FIRMWARE); MODULE_FIRMWARE(DSPEI_FIRMWARE); MODULE_FIRMWARE(DSPEP_FIRMWARE); MODULE_FIRMWARE(FPGA930_FIRMWARE); MODULE_FIRMWARE(CMV4P_FIRMWARE); MODULE_FIRMWARE(CMV4PV2_FIRMWARE); MODULE_FIRMWARE(CMV4I_FIRMWARE); MODULE_FIRMWARE(CMV4IV2_FIRMWARE); MODULE_FIRMWARE(CMV9P_FIRMWARE); MODULE_FIRMWARE(CMV9PV2_FIRMWARE); MODULE_FIRMWARE(CMV9I_FIRMWARE); MODULE_FIRMWARE(CMV9IV2_FIRMWARE); MODULE_FIRMWARE(CMVEP_FIRMWARE); MODULE_FIRMWARE(CMVEPV2_FIRMWARE); MODULE_FIRMWARE(CMVEI_FIRMWARE); MODULE_FIRMWARE(CMVEIV2_FIRMWARE); |
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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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * drivers/net/bond/bond_options.c - bonding options * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> */ #include <linux/errno.h> #include <linux/if.h> #include <linux/netdevice.h> #include <linux/spinlock.h> #include <linux/rcupdate.h> #include <linux/ctype.h> #include <linux/inet.h> #include <linux/sched/signal.h> #include <net/bonding.h> #include <net/ndisc.h> static int bond_option_active_slave_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_miimon_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_updelay_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_downdelay_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_peer_notif_delay_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_use_carrier_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_arp_interval_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target); static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target); static int bond_option_arp_ip_targets_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_ns_ip6_targets_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_arp_validate_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_arp_all_targets_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_prio_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_primary_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_primary_reselect_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_fail_over_mac_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_xmit_hash_policy_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_resend_igmp_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_num_peer_notif_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_all_slaves_active_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_min_links_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_lp_interval_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_pps_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_lacp_active_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_lacp_rate_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_ad_select_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_queue_id_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_slaves_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_actor_port_prio_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_ad_actor_system_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_ad_user_port_key_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_missed_max_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_coupled_control_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_broadcast_neigh_set(struct bonding *bond, const struct bond_opt_value *newval); static const struct bond_opt_value bond_mode_tbl[] = { { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT}, { "active-backup", BOND_MODE_ACTIVEBACKUP, 0}, { "balance-xor", BOND_MODE_XOR, 0}, { "broadcast", BOND_MODE_BROADCAST, 0}, { "802.3ad", BOND_MODE_8023AD, 0}, { "balance-tlb", BOND_MODE_TLB, 0}, { "balance-alb", BOND_MODE_ALB, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_pps_tbl[] = { { "default", 1, BOND_VALFLAG_DEFAULT}, { "maxval", USHRT_MAX, BOND_VALFLAG_MAX}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_xmit_hashtype_tbl[] = { { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT}, { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0}, { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0}, { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0}, { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0}, { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_arp_validate_tbl[] = { { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT}, { "active", BOND_ARP_VALIDATE_ACTIVE, 0}, { "backup", BOND_ARP_VALIDATE_BACKUP, 0}, { "all", BOND_ARP_VALIDATE_ALL, 0}, { "filter", BOND_ARP_FILTER, 0}, { "filter_active", BOND_ARP_FILTER_ACTIVE, 0}, { "filter_backup", BOND_ARP_FILTER_BACKUP, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_arp_all_targets_tbl[] = { { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT}, { "all", BOND_ARP_TARGETS_ALL, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_fail_over_mac_tbl[] = { { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT}, { "active", BOND_FOM_ACTIVE, 0}, { "follow", BOND_FOM_FOLLOW, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_intmax_tbl[] = { { "off", 0, BOND_VALFLAG_DEFAULT}, { "maxval", INT_MAX, BOND_VALFLAG_MAX}, { NULL, -1, 0} }; static const struct bond_opt_value bond_lacp_active[] = { { "off", 0, 0}, { "on", 1, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0} }; static const struct bond_opt_value bond_lacp_rate_tbl[] = { { "slow", AD_LACP_SLOW, 0}, { "fast", AD_LACP_FAST, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_ad_select_tbl[] = { { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT}, { "bandwidth", BOND_AD_BANDWIDTH, 0}, { "count", BOND_AD_COUNT, 0}, { "actor_port_prio", BOND_AD_PRIO, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_num_peer_notif_tbl[] = { { "off", 0, 0}, { "maxval", 255, BOND_VALFLAG_MAX}, { "default", 1, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0} }; static const struct bond_opt_value bond_peer_notif_delay_tbl[] = { { "off", 0, 0}, { "maxval", 300000, BOND_VALFLAG_MAX}, { NULL, -1, 0} }; static const struct bond_opt_value bond_primary_reselect_tbl[] = { { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT}, { "better", BOND_PRI_RESELECT_BETTER, 0}, { "failure", BOND_PRI_RESELECT_FAILURE, 0}, { NULL, -1}, }; static const struct bond_opt_value bond_use_carrier_tbl[] = { { "on", 1, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0} }; static const struct bond_opt_value bond_all_slaves_active_tbl[] = { { "off", 0, BOND_VALFLAG_DEFAULT}, { "on", 1, 0}, { NULL, -1, 0} }; static const struct bond_opt_value bond_resend_igmp_tbl[] = { { "off", 0, 0}, { "maxval", 255, BOND_VALFLAG_MAX}, { "default", 1, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0} }; static const struct bond_opt_value bond_lp_interval_tbl[] = { { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, { "maxval", INT_MAX, BOND_VALFLAG_MAX}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = { { "off", 0, 0}, { "on", 1, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0} }; static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = { { "minval", 1, BOND_VALFLAG_MIN}, { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_actor_port_prio_tbl[] = { { "minval", 0, BOND_VALFLAG_MIN}, { "maxval", 65535, BOND_VALFLAG_MAX}, { "default", 255, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_ad_user_port_key_tbl[] = { { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, { "maxval", 1023, BOND_VALFLAG_MAX}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_missed_max_tbl[] = { { "minval", 1, BOND_VALFLAG_MIN}, { "maxval", 255, BOND_VALFLAG_MAX}, { "default", 2, BOND_VALFLAG_DEFAULT}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_coupled_control_tbl[] = { { "on", 1, BOND_VALFLAG_DEFAULT}, { "off", 0, 0}, { NULL, -1, 0}, }; static const struct bond_opt_value bond_broadcast_neigh_tbl[] = { { "off", 0, BOND_VALFLAG_DEFAULT}, { "on", 1, 0}, { NULL, -1, 0} }; static const struct bond_option bond_opts[BOND_OPT_LAST] = { [BOND_OPT_MODE] = { .id = BOND_OPT_MODE, .name = "mode", .desc = "bond device mode", .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN, .values = bond_mode_tbl, .set = bond_option_mode_set }, [BOND_OPT_PACKETS_PER_SLAVE] = { .id = BOND_OPT_PACKETS_PER_SLAVE, .name = "packets_per_slave", .desc = "Packets to send per slave in RR mode", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)), .values = bond_pps_tbl, .set = bond_option_pps_set }, [BOND_OPT_XMIT_HASH] = { .id = BOND_OPT_XMIT_HASH, .name = "xmit_hash_policy", .desc = "balance-xor, 802.3ad, and tlb hashing method", .values = bond_xmit_hashtype_tbl, .set = bond_option_xmit_hash_policy_set }, [BOND_OPT_ARP_VALIDATE] = { .id = BOND_OPT_ARP_VALIDATE, .name = "arp_validate", .desc = "validate src/dst of ARP probes", .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB), .values = bond_arp_validate_tbl, .set = bond_option_arp_validate_set }, [BOND_OPT_ARP_ALL_TARGETS] = { .id = BOND_OPT_ARP_ALL_TARGETS, .name = "arp_all_targets", .desc = "fail on any/all arp targets timeout", .values = bond_arp_all_targets_tbl, .set = bond_option_arp_all_targets_set }, [BOND_OPT_FAIL_OVER_MAC] = { .id = BOND_OPT_FAIL_OVER_MAC, .name = "fail_over_mac", .desc = "For active-backup, do not set all slaves to the same MAC", .flags = BOND_OPTFLAG_NOSLAVES, .values = bond_fail_over_mac_tbl, .set = bond_option_fail_over_mac_set }, [BOND_OPT_ARP_INTERVAL] = { .id = BOND_OPT_ARP_INTERVAL, .name = "arp_interval", .desc = "arp interval in milliseconds", .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB), .values = bond_intmax_tbl, .set = bond_option_arp_interval_set }, [BOND_OPT_MISSED_MAX] = { .id = BOND_OPT_MISSED_MAX, .name = "arp_missed_max", .desc = "Maximum number of missed ARP interval", .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB), .values = bond_missed_max_tbl, .set = bond_option_missed_max_set }, [BOND_OPT_ARP_TARGETS] = { .id = BOND_OPT_ARP_TARGETS, .name = "arp_ip_target", .desc = "arp targets in n.n.n.n form", .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_arp_ip_targets_set }, [BOND_OPT_NS_TARGETS] = { .id = BOND_OPT_NS_TARGETS, .name = "ns_ip6_target", .desc = "NS targets in ffff:ffff::ffff:ffff form", .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_ns_ip6_targets_set }, [BOND_OPT_DOWNDELAY] = { .id = BOND_OPT_DOWNDELAY, .name = "downdelay", .desc = "Delay before considering link down, in milliseconds", .values = bond_intmax_tbl, .set = bond_option_downdelay_set }, [BOND_OPT_UPDELAY] = { .id = BOND_OPT_UPDELAY, .name = "updelay", .desc = "Delay before considering link up, in milliseconds", .values = bond_intmax_tbl, .set = bond_option_updelay_set }, [BOND_OPT_LACP_ACTIVE] = { .id = BOND_OPT_LACP_ACTIVE, .name = "lacp_active", .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to", .flags = BOND_OPTFLAG_IFDOWN, .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .values = bond_lacp_active, .set = bond_option_lacp_active_set }, [BOND_OPT_LACP_RATE] = { .id = BOND_OPT_LACP_RATE, .name = "lacp_rate", .desc = "LACPDU tx rate to request from 802.3ad partner", .flags = BOND_OPTFLAG_IFDOWN, .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .values = bond_lacp_rate_tbl, .set = bond_option_lacp_rate_set }, [BOND_OPT_MINLINKS] = { .id = BOND_OPT_MINLINKS, .name = "min_links", .desc = "Minimum number of available links before turning on carrier", .values = bond_intmax_tbl, .set = bond_option_min_links_set }, [BOND_OPT_AD_SELECT] = { .id = BOND_OPT_AD_SELECT, .name = "ad_select", .desc = "802.3ad aggregation selection logic", .flags = BOND_OPTFLAG_IFDOWN, .values = bond_ad_select_tbl, .set = bond_option_ad_select_set }, [BOND_OPT_NUM_PEER_NOTIF] = { .id = BOND_OPT_NUM_PEER_NOTIF, .name = "num_unsol_na", .desc = "Number of peer notifications to send on failover event", .values = bond_num_peer_notif_tbl, .set = bond_option_num_peer_notif_set }, [BOND_OPT_MIIMON] = { .id = BOND_OPT_MIIMON, .name = "miimon", .desc = "Link check interval in milliseconds", .values = bond_intmax_tbl, .set = bond_option_miimon_set }, [BOND_OPT_PRIO] = { .id = BOND_OPT_PRIO, .name = "prio", .desc = "Link priority for failover re-selection", .flags = BOND_OPTFLAG_RAWVAL, .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), .set = bond_option_prio_set }, [BOND_OPT_PRIMARY] = { .id = BOND_OPT_PRIMARY, .name = "primary", .desc = "Primary network device to use", .flags = BOND_OPTFLAG_RAWVAL, .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), .set = bond_option_primary_set }, [BOND_OPT_PRIMARY_RESELECT] = { .id = BOND_OPT_PRIMARY_RESELECT, .name = "primary_reselect", .desc = "Reselect primary slave once it comes up", .values = bond_primary_reselect_tbl, .set = bond_option_primary_reselect_set }, [BOND_OPT_USE_CARRIER] = { .id = BOND_OPT_USE_CARRIER, .name = "use_carrier", .desc = "option obsolete, use_carrier cannot be disabled", .values = bond_use_carrier_tbl, .set = bond_option_use_carrier_set }, [BOND_OPT_ACTIVE_SLAVE] = { .id = BOND_OPT_ACTIVE_SLAVE, .name = "active_slave", .desc = "Currently active slave", .flags = BOND_OPTFLAG_RAWVAL, .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), .set = bond_option_active_slave_set }, [BOND_OPT_QUEUE_ID] = { .id = BOND_OPT_QUEUE_ID, .name = "queue_id", .desc = "Set queue id of a slave", .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_queue_id_set }, [BOND_OPT_ALL_SLAVES_ACTIVE] = { .id = BOND_OPT_ALL_SLAVES_ACTIVE, .name = "all_slaves_active", .desc = "Keep all frames received on an interface by setting active flag for all slaves", .values = bond_all_slaves_active_tbl, .set = bond_option_all_slaves_active_set }, [BOND_OPT_RESEND_IGMP] = { .id = BOND_OPT_RESEND_IGMP, .name = "resend_igmp", .desc = "Number of IGMP membership reports to send on link failure", .values = bond_resend_igmp_tbl, .set = bond_option_resend_igmp_set }, [BOND_OPT_LP_INTERVAL] = { .id = BOND_OPT_LP_INTERVAL, .name = "lp_interval", .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch", .values = bond_lp_interval_tbl, .set = bond_option_lp_interval_set }, [BOND_OPT_SLAVES] = { .id = BOND_OPT_SLAVES, .name = "slaves", .desc = "Slave membership management", .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_slaves_set }, [BOND_OPT_TLB_DYNAMIC_LB] = { .id = BOND_OPT_TLB_DYNAMIC_LB, .name = "tlb_dynamic_lb", .desc = "Enable dynamic flow shuffling", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), .values = bond_tlb_dynamic_lb_tbl, .flags = BOND_OPTFLAG_IFDOWN, .set = bond_option_tlb_dynamic_lb_set, }, [BOND_OPT_AD_ACTOR_SYS_PRIO] = { .id = BOND_OPT_AD_ACTOR_SYS_PRIO, .name = "ad_actor_sys_prio", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .values = bond_ad_actor_sys_prio_tbl, .set = bond_option_ad_actor_sys_prio_set, }, [BOND_OPT_ACTOR_PORT_PRIO] = { .id = BOND_OPT_ACTOR_PORT_PRIO, .name = "actor_port_prio", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .values = bond_actor_port_prio_tbl, .set = bond_option_actor_port_prio_set, }, [BOND_OPT_AD_ACTOR_SYSTEM] = { .id = BOND_OPT_AD_ACTOR_SYSTEM, .name = "ad_actor_system", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_ad_actor_system_set, }, [BOND_OPT_AD_USER_PORT_KEY] = { .id = BOND_OPT_AD_USER_PORT_KEY, .name = "ad_user_port_key", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .flags = BOND_OPTFLAG_IFDOWN, .values = bond_ad_user_port_key_tbl, .set = bond_option_ad_user_port_key_set, }, [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = { .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS, .name = "num_grat_arp", .desc = "Number of peer notifications to send on failover event", .values = bond_num_peer_notif_tbl, .set = bond_option_num_peer_notif_set }, [BOND_OPT_PEER_NOTIF_DELAY] = { .id = BOND_OPT_PEER_NOTIF_DELAY, .name = "peer_notif_delay", .desc = "Delay between each peer notification on failover event, in milliseconds", .values = bond_peer_notif_delay_tbl, .set = bond_option_peer_notif_delay_set }, [BOND_OPT_COUPLED_CONTROL] = { .id = BOND_OPT_COUPLED_CONTROL, .name = "coupled_control", .desc = "Opt into using coupled control MUX for LACP states", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .flags = BOND_OPTFLAG_IFDOWN, .values = bond_coupled_control_tbl, .set = bond_option_coupled_control_set, }, [BOND_OPT_BROADCAST_NEIGH] = { .id = BOND_OPT_BROADCAST_NEIGH, .name = "broadcast_neighbor", .desc = "Broadcast neighbor packets to all active slaves", .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), .values = bond_broadcast_neigh_tbl, .set = bond_option_broadcast_neigh_set, } }; /* Searches for an option by name */ const struct bond_option *bond_opt_get_by_name(const char *name) { const struct bond_option *opt; int option; for (option = 0; option < BOND_OPT_LAST; option++) { opt = bond_opt_get(option); if (opt && !strcmp(opt->name, name)) return opt; } return NULL; } /* Searches for a value in opt's values[] table */ const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) { const struct bond_option *opt; int i; opt = bond_opt_get(option); if (WARN_ON(!opt)) return NULL; for (i = 0; opt->values && opt->values[i].string; i++) if (opt->values[i].value == val) return &opt->values[i]; return NULL; } /* Searches for a value in opt's values[] table which matches the flagmask */ static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, u32 flagmask) { int i; for (i = 0; opt->values && opt->values[i].string; i++) if (opt->values[i].flags & flagmask) return &opt->values[i]; return NULL; } /* If maxval is missing then there's no range to check. In case minval is * missing then it's considered to be 0. */ static bool bond_opt_check_range(const struct bond_option *opt, u64 val) { const struct bond_opt_value *minval, *maxval; minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); if (!maxval || (minval && val < minval->value) || val > maxval->value) return false; return true; } /** * bond_opt_parse - parse option value * @opt: the option to parse against * @val: value to parse * * This function tries to extract the value from @val and check if it's * a possible match for the option and returns NULL if a match isn't found, * or the struct_opt_value that matched. It also strips the new line from * @val->string if it's present. */ const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, struct bond_opt_value *val) { char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; const struct bond_opt_value *tbl; const struct bond_opt_value *ret = NULL; bool checkval; int i, rv; /* No parsing if the option wants a raw val */ if (opt->flags & BOND_OPTFLAG_RAWVAL) return val; tbl = opt->values; if (!tbl) goto out; /* ULLONG_MAX is used to bypass string processing */ checkval = val->value != ULLONG_MAX; if (!checkval) { if (!val->string) goto out; p = strchr(val->string, '\n'); if (p) *p = '\0'; for (p = val->string; *p; p++) if (!(isdigit(*p) || isspace(*p))) break; /* The following code extracts the string to match or the value * and sets checkval appropriately */ if (*p) { rv = sscanf(val->string, "%32s", valstr); } else { rv = sscanf(val->string, "%llu", &val->value); checkval = true; } if (!rv) goto out; } for (i = 0; tbl[i].string; i++) { /* Check for exact match */ if (checkval) { if (val->value == tbl[i].value) ret = &tbl[i]; } else { if (!strcmp(valstr, "default") && (tbl[i].flags & BOND_VALFLAG_DEFAULT)) ret = &tbl[i]; if (!strcmp(valstr, tbl[i].string)) ret = &tbl[i]; } /* Found an exact match */ if (ret) goto out; } /* Possible range match */ if (checkval && bond_opt_check_range(opt, val->value)) ret = val; out: return ret; } /* Check opt's dependencies against bond mode and currently set options */ static int bond_opt_check_deps(struct bonding *bond, const struct bond_option *opt) { struct bond_params *params = &bond->params; if (test_bit(params->mode, &opt->unsuppmodes)) return -EACCES; if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) return -ENOTEMPTY; if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) return -EBUSY; return 0; } static void bond_opt_dep_print(struct bonding *bond, const struct bond_option *opt, struct nlattr *bad_attr, struct netlink_ext_ack *extack) { const struct bond_opt_value *modeval; struct bond_params *params; params = &bond->params; modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); if (test_bit(params->mode, &opt->unsuppmodes)) { netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n", opt->name, modeval->string, modeval->value); NL_SET_ERR_MSG_ATTR(extack, bad_attr, "option not supported in mode"); } } static void bond_opt_error_interpret(struct bonding *bond, const struct bond_option *opt, int error, const struct bond_opt_value *val, struct nlattr *bad_attr, struct netlink_ext_ack *extack) { const struct bond_opt_value *minval, *maxval; char *p; switch (error) { case -EINVAL: NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value"); if (val) { if (val->string) { /* sometimes RAWVAL opts may have new lines */ p = strchr(val->string, '\n'); if (p) *p = '\0'; netdev_err(bond->dev, "option %s: invalid value (%s)\n", opt->name, val->string); } else { netdev_err(bond->dev, "option %s: invalid value (%llu)\n", opt->name, val->value); } } minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); if (!maxval) break; netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n", opt->name, minval ? minval->value : 0, maxval->value); break; case -EACCES: bond_opt_dep_print(bond, opt, bad_attr, extack); break; case -ENOTEMPTY: NL_SET_ERR_MSG_ATTR(extack, bad_attr, "unable to set option because the bond device has slaves"); netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n", opt->name); break; case -EBUSY: NL_SET_ERR_MSG_ATTR(extack, bad_attr, "unable to set option because the bond is up"); netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n", opt->name); break; case -ENODEV: if (val && val->string) { p = strchr(val->string, '\n'); if (p) *p = '\0'; netdev_err(bond->dev, "option %s: interface %s does not exist!\n", opt->name, val->string); NL_SET_ERR_MSG_ATTR(extack, bad_attr, "interface does not exist"); } break; default: break; } } /** * __bond_opt_set - set a bonding option * @bond: target bond device * @option: option to set * @val: value to set it to * @bad_attr: netlink attribue that caused the error * @extack: extended netlink error structure, used when an error message * needs to be returned to the caller via netlink * * This function is used to change the bond's option value, it can be * used for both enabling/changing an option and for disabling it. RTNL lock * must be obtained before calling this function. */ int __bond_opt_set(struct bonding *bond, unsigned int option, struct bond_opt_value *val, struct nlattr *bad_attr, struct netlink_ext_ack *extack) { const struct bond_opt_value *retval = NULL; const struct bond_option *opt; int ret = -ENOENT; ASSERT_RTNL(); opt = bond_opt_get(option); if (WARN_ON(!val) || WARN_ON(!opt)) goto out; ret = bond_opt_check_deps(bond, opt); if (ret) goto out; retval = bond_opt_parse(opt, val); if (!retval) { ret = -EINVAL; goto out; } ret = opt->set(bond, retval); out: if (ret) bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack); return ret; } /** * __bond_opt_set_notify - set a bonding option * @bond: target bond device * @option: option to set * @val: value to set it to * * This function is used to change the bond's option value and trigger * a notification to user sapce. It can be used for both enabling/changing * an option and for disabling it. RTNL lock must be obtained before calling * this function. */ int __bond_opt_set_notify(struct bonding *bond, unsigned int option, struct bond_opt_value *val) { int ret; ASSERT_RTNL(); ret = __bond_opt_set(bond, option, val, NULL, NULL); if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); return ret; } /** * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set * @bond: target bond device * @option: option to set * @buf: value to set it to * * This function tries to acquire RTNL without blocking and if successful * calls __bond_opt_set. It is mainly used for sysfs option manipulation. */ int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) { struct bond_opt_value optval; int ret; if (!rtnl_trylock()) return restart_syscall(); bond_opt_initstr(&optval, buf); ret = __bond_opt_set_notify(bond, option, &optval); rtnl_unlock(); return ret; } /** * bond_opt_get - get a pointer to an option * @option: option for which to return a pointer * * This function checks if option is valid and if so returns a pointer * to its entry in the bond_opts[] option array. */ const struct bond_option *bond_opt_get(unsigned int option) { if (!BOND_OPT_VALID(option)) return NULL; return &bond_opts[option]; } static bool bond_set_xfrm_features(struct bonding *bond) { if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD)) return false; if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) bond->dev->wanted_features |= BOND_XFRM_FEATURES; else bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; return true; } static int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval) { if (bond->xdp_prog && !bond_xdp_check(bond, newval->value)) return -EOPNOTSUPP; if (!bond_mode_uses_arp(newval->value)) { if (bond->params.arp_interval) { netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", newval->string); /* disable arp monitoring */ bond->params.arp_interval = 0; } if (!bond->params.miimon) { /* set miimon to default value */ bond->params.miimon = BOND_DEFAULT_MIIMON; netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", bond->params.miimon); } } if (newval->value == BOND_MODE_ALB) bond->params.tlb_dynamic_lb = 1; /* don't cache arp_validate between modes */ bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; bond->params.mode = newval->value; /* When changing mode, the bond device is down, we may reduce * the bond_bcast_neigh_enabled in bond_close() if broadcast_neighbor * enabled in 8023ad mode. Therefore, only clear broadcast_neighbor * to 0. */ bond->params.broadcast_neighbor = 0; if (bond->dev->reg_state == NETREG_REGISTERED) { bool update = false; update |= bond_set_xfrm_features(bond); if (update) netdev_update_features(bond->dev); } bond_xdp_set_features(bond->dev); return 0; } static int bond_option_active_slave_set(struct bonding *bond, const struct bond_opt_value *newval) { char ifname[IFNAMSIZ] = { 0, }; struct net_device *slave_dev; int ret = 0; sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ if (!strlen(ifname) || newval->string[0] == '\n') { slave_dev = NULL; } else { slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); if (!slave_dev) return -ENODEV; } if (slave_dev) { if (!netif_is_bond_slave(slave_dev)) { slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); return -EINVAL; } if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { slave_err(bond->dev, slave_dev, "Device is not our slave\n"); return -EINVAL; } } block_netpoll_tx(); /* check to see if we are clearing active */ if (!slave_dev) { netdev_dbg(bond->dev, "Clearing current active slave\n"); bond_change_active_slave(bond, NULL); bond_select_active_slave(bond); } else { struct slave *old_active = rtnl_dereference(bond->curr_active_slave); struct slave *new_active = bond_slave_get_rtnl(slave_dev); BUG_ON(!new_active); if (new_active == old_active) { /* do nothing */ slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); } else { if (old_active && (new_active->link == BOND_LINK_UP) && bond_slave_is_up(new_active)) { slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); bond_change_active_slave(bond, new_active); } else { slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", new_active->dev->name); ret = -EINVAL; } } } unblock_netpoll_tx(); return ret; } /* There are two tricky bits here. First, if MII monitoring is activated, then * we must disable ARP monitoring. Second, if the timer isn't running, we must * start it. */ static int bond_option_miimon_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", newval->value); bond->params.miimon = newval->value; if (bond->params.updelay) netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", bond->params.updelay * bond->params.miimon); if (bond->params.downdelay) netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", bond->params.downdelay * bond->params.miimon); if (bond->params.peer_notif_delay) netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", bond->params.peer_notif_delay * bond->params.miimon); if (newval->value && bond->params.arp_interval) { netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); bond->params.arp_interval = 0; if (bond->params.arp_validate) bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; } if (bond->dev->flags & IFF_UP) { /* If the interface is up, we may need to fire off * the MII timer. If the interface is down, the * timer will get fired off when the open function * is called. */ if (!newval->value) { cancel_delayed_work_sync(&bond->mii_work); } else { cancel_delayed_work_sync(&bond->arp_work); queue_delayed_work(bond->wq, &bond->mii_work, 0); } } return 0; } /* Set up, down and peer notification delays. These must be multiples * of the MII monitoring value, and are stored internally as the * multiplier. Thus, we must translate to MS for the real world. */ static int _bond_option_delay_set(struct bonding *bond, const struct bond_opt_value *newval, const char *name, int *target) { int value = newval->value; if (!bond->params.miimon) { netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", name); return -EPERM; } if ((value % bond->params.miimon) != 0) { netdev_warn(bond->dev, "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", name, value, bond->params.miimon, (value / bond->params.miimon) * bond->params.miimon); } *target = value / bond->params.miimon; netdev_dbg(bond->dev, "Setting %s to %d\n", name, *target * bond->params.miimon); return 0; } static int bond_option_updelay_set(struct bonding *bond, const struct bond_opt_value *newval) { return _bond_option_delay_set(bond, newval, "up delay", &bond->params.updelay); } static int bond_option_downdelay_set(struct bonding *bond, const struct bond_opt_value *newval) { return _bond_option_delay_set(bond, newval, "down delay", &bond->params.downdelay); } static int bond_option_peer_notif_delay_set(struct bonding *bond, const struct bond_opt_value *newval) { int ret = _bond_option_delay_set(bond, newval, "peer notification delay", &bond->params.peer_notif_delay); return ret; } static int bond_option_use_carrier_set(struct bonding *bond, const struct bond_opt_value *newval) { return 0; } /* There are two tricky bits here. First, if ARP monitoring is activated, then * we must disable MII monitoring. Second, if the ARP timer isn't running, * we must start it. */ static int bond_option_arp_interval_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", newval->value); bond->params.arp_interval = newval->value; if (newval->value) { if (bond->params.miimon) { netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); bond->params.miimon = 0; } if (!bond->params.arp_targets[0]) netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); } if (bond->dev->flags & IFF_UP) { /* If the interface is up, we may need to fire off * the ARP timer. If the interface is down, the * timer will get fired off when the open function * is called. */ if (!newval->value) { if (bond->params.arp_validate) bond->recv_probe = NULL; cancel_delayed_work_sync(&bond->arp_work); } else { /* arp_validate can be set only in active-backup mode */ bond->recv_probe = bond_rcv_validate; cancel_delayed_work_sync(&bond->mii_work); queue_delayed_work(bond->wq, &bond->arp_work, 0); } } return 0; } static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, __be32 target, unsigned long last_rx) { __be32 *targets = bond->params.arp_targets; struct list_head *iter; struct slave *slave; if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { bond_for_each_slave(bond, slave, iter) slave->target_last_arp_rx[slot] = last_rx; targets[slot] = target; } } static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) { __be32 *targets = bond->params.arp_targets; int ind; if (!bond_is_ip_target_ok(target)) { netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", &target); return -EINVAL; } if (bond_get_targets_ip(targets, target) != -1) { /* dup */ netdev_err(bond->dev, "ARP target %pI4 is already present\n", &target); return -EINVAL; } ind = bond_get_targets_ip(targets, 0); /* first free slot */ if (ind == -1) { netdev_err(bond->dev, "ARP target table is full!\n"); return -EINVAL; } netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); _bond_options_arp_ip_target_set(bond, ind, target, jiffies); return 0; } static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) { return _bond_option_arp_ip_target_add(bond, target); } static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) { __be32 *targets = bond->params.arp_targets; struct list_head *iter; struct slave *slave; unsigned long *targets_rx; int ind, i; if (!bond_is_ip_target_ok(target)) { netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", &target); return -EINVAL; } ind = bond_get_targets_ip(targets, target); if (ind == -1) { netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", &target); return -EINVAL; } if (ind == 0 && !targets[1] && bond->params.arp_interval) netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); bond_for_each_slave(bond, slave, iter) { targets_rx = slave->target_last_arp_rx; for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) targets_rx[i] = targets_rx[i+1]; targets_rx[i] = 0; } for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) targets[i] = targets[i+1]; targets[i] = 0; return 0; } void bond_option_arp_ip_targets_clear(struct bonding *bond) { int i; for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) _bond_options_arp_ip_target_set(bond, i, 0, 0); } static int bond_option_arp_ip_targets_set(struct bonding *bond, const struct bond_opt_value *newval) { int ret = -EPERM; __be32 target; if (newval->string) { if (strlen(newval->string) < 1 || !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) { netdev_err(bond->dev, "invalid ARP target specified\n"); return ret; } if (newval->string[0] == '+') ret = bond_option_arp_ip_target_add(bond, target); else if (newval->string[0] == '-') ret = bond_option_arp_ip_target_rem(bond, target); else netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); } else { target = newval->value; ret = bond_option_arp_ip_target_add(bond, target); } return ret; } #if IS_ENABLED(CONFIG_IPV6) static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave) { return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && !bond_is_active_slave(slave) && slave->dev->flags & IFF_MULTICAST; } /** * slave_set_ns_maddrs - add/del all NS mac addresses for slave * @bond: bond device * @slave: slave device * @add: add or remove all the NS mac addresses * * This function tries to add or delete all the NS mac addresses on the slave * * Note, the IPv6 NS target address is the unicast address in Neighbor * Solicitation (NS) message. The dest address of NS message should be * solicited-node multicast address of the target. The dest mac of NS message * is converted from the solicited-node multicast address. * * This function is called when * * arp_validate changes * * enslaving, releasing new slaves */ static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) { struct in6_addr *targets = bond->params.ns_targets; char slot_maddr[MAX_ADDR_LEN]; struct in6_addr mcaddr; int i; if (!slave_can_set_ns_maddr(bond, slave)) return; for (i = 0; i < BOND_MAX_NS_TARGETS; i++) { if (ipv6_addr_any(&targets[i])) break; addrconf_addr_solict_mult(&targets[i], &mcaddr); if (!ndisc_mc_map(&mcaddr, slot_maddr, slave->dev, 0)) { if (add) dev_mc_add(slave->dev, slot_maddr); else dev_mc_del(slave->dev, slot_maddr); } } } void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) { if (!bond->params.arp_validate) return; slave_set_ns_maddrs(bond, slave, true); } void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) { if (!bond->params.arp_validate) return; slave_set_ns_maddrs(bond, slave, false); } /** * slave_set_ns_maddr - set new NS mac address for slave * @bond: bond device * @slave: slave device * @target: the new IPv6 target * @slot: the old IPv6 target in the slot * * This function tries to replace the old mac address to new one on the slave. * * Note, the target/slot IPv6 address is the unicast address in Neighbor * Solicitation (NS) message. The dest address of NS message should be * solicited-node multicast address of the target. The dest mac of NS message * is converted from the solicited-node multicast address. * * This function is called when * * An IPv6 NS target is added or removed. */ static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave, struct in6_addr *target, struct in6_addr *slot) { char mac_addr[MAX_ADDR_LEN]; struct in6_addr mcast_addr; if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave)) return; /* remove the previous mac addr from slave */ addrconf_addr_solict_mult(slot, &mcast_addr); if (!ipv6_addr_any(slot) && !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0)) dev_mc_del(slave->dev, mac_addr); /* add new mac addr on slave if target is set */ addrconf_addr_solict_mult(target, &mcast_addr); if (!ipv6_addr_any(target) && !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0)) dev_mc_add(slave->dev, mac_addr); } static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot, struct in6_addr *target, unsigned long last_rx) { struct in6_addr *targets = bond->params.ns_targets; struct list_head *iter; struct slave *slave; if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) { bond_for_each_slave(bond, slave, iter) { slave->target_last_arp_rx[slot] = last_rx; slave_set_ns_maddr(bond, slave, target, &targets[slot]); } targets[slot] = *target; } } void bond_option_ns_ip6_targets_clear(struct bonding *bond) { struct in6_addr addr_any = in6addr_any; int i; for (i = 0; i < BOND_MAX_NS_TARGETS; i++) _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0); } static int bond_option_ns_ip6_targets_set(struct bonding *bond, const struct bond_opt_value *newval) { struct in6_addr *target = (struct in6_addr *)newval->extra; struct in6_addr *targets = bond->params.ns_targets; struct in6_addr addr_any = in6addr_any; int index; if (!bond_is_ip6_target_ok(target)) { netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n", target); return -EINVAL; } if (bond_get_targets_ip6(targets, target) != -1) { /* dup */ netdev_err(bond->dev, "NS target %pI6c is already present\n", target); return -EINVAL; } index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */ if (index == -1) { netdev_err(bond->dev, "NS target table is full!\n"); return -EINVAL; } netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target); _bond_options_ns_ip6_target_set(bond, index, target, jiffies); return 0; } #else static int bond_option_ns_ip6_targets_set(struct bonding *bond, const struct bond_opt_value *newval) { return -EPERM; } static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {} void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {} void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {} #endif static int bond_option_arp_validate_set(struct bonding *bond, const struct bond_opt_value *newval) { bool changed = !!bond->params.arp_validate != !!newval->value; struct list_head *iter; struct slave *slave; netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", newval->string, newval->value); bond->params.arp_validate = newval->value; if (changed) { bond_for_each_slave(bond, slave, iter) slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate); } return 0; } static int bond_option_arp_all_targets_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", newval->string, newval->value); bond->params.arp_all_targets = newval->value; return 0; } static int bond_option_missed_max_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n", newval->string, newval->value); bond->params.missed_max = newval->value; return 0; } static int bond_option_prio_set(struct bonding *bond, const struct bond_opt_value *newval) { struct slave *slave; slave = bond_slave_get_rtnl(newval->slave_dev); if (!slave) { netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__); return -ENODEV; } slave->prio = newval->value; if (rtnl_dereference(bond->primary_slave)) slave_warn(bond->dev, slave->dev, "prio updated, but will not affect failover re-selection as primary slave have been set\n"); else bond_select_active_slave(bond); return 0; } static int bond_option_primary_set(struct bonding *bond, const struct bond_opt_value *newval) { char *p, *primary = newval->string; struct list_head *iter; struct slave *slave; block_netpoll_tx(); p = strchr(primary, '\n'); if (p) *p = '\0'; /* check to see if we are clearing primary */ if (!strlen(primary)) { netdev_dbg(bond->dev, "Setting primary slave to None\n"); RCU_INIT_POINTER(bond->primary_slave, NULL); memset(bond->params.primary, 0, sizeof(bond->params.primary)); bond_select_active_slave(bond); goto out; } bond_for_each_slave(bond, slave, iter) { if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); rcu_assign_pointer(bond->primary_slave, slave); strcpy(bond->params.primary, slave->dev->name); bond->force_primary = true; bond_select_active_slave(bond); goto out; } } if (rtnl_dereference(bond->primary_slave)) { netdev_dbg(bond->dev, "Setting primary slave to None\n"); RCU_INIT_POINTER(bond->primary_slave, NULL); bond_select_active_slave(bond); } strscpy_pad(bond->params.primary, primary, IFNAMSIZ); netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", primary); out: unblock_netpoll_tx(); return 0; } static int bond_option_primary_reselect_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", newval->string, newval->value); bond->params.primary_reselect = newval->value; block_netpoll_tx(); bond_select_active_slave(bond); unblock_netpoll_tx(); return 0; } static int bond_option_fail_over_mac_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", newval->string, newval->value); bond->params.fail_over_mac = newval->value; return 0; } static int bond_option_xmit_hash_policy_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", newval->string, newval->value); bond->params.xmit_policy = newval->value; return 0; } static int bond_option_resend_igmp_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", newval->value); bond->params.resend_igmp = newval->value; return 0; } static int bond_option_num_peer_notif_set(struct bonding *bond, const struct bond_opt_value *newval) { bond->params.num_peer_notif = newval->value; return 0; } static int bond_option_all_slaves_active_set(struct bonding *bond, const struct bond_opt_value *newval) { struct list_head *iter; struct slave *slave; if (newval->value == bond->params.all_slaves_active) return 0; bond->params.all_slaves_active = newval->value; bond_for_each_slave(bond, slave, iter) { if (!bond_is_active_slave(slave)) { if (newval->value) slave->inactive = 0; else slave->inactive = 1; } } return 0; } static int bond_option_min_links_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting min links value to %llu\n", newval->value); bond->params.min_links = newval->value; bond_set_carrier(bond); return 0; } static int bond_option_lp_interval_set(struct bonding *bond, const struct bond_opt_value *newval) { bond->params.lp_interval = newval->value; return 0; } static int bond_option_pps_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", newval->value); bond->params.packets_per_slave = newval->value; if (newval->value > 0) { bond->params.reciprocal_packets_per_slave = reciprocal_value(newval->value); } else { /* reciprocal_packets_per_slave is unused if * packets_per_slave is 0 or 1, just initialize it */ bond->params.reciprocal_packets_per_slave = (struct reciprocal_value) { 0 }; } return 0; } static int bond_option_lacp_active_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n", newval->string, newval->value); bond->params.lacp_active = newval->value; bond_3ad_update_lacp_active(bond); return 0; } static int bond_option_lacp_rate_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", newval->string, newval->value); bond->params.lacp_fast = newval->value; bond_3ad_update_lacp_rate(bond); return 0; } static int bond_option_ad_select_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", newval->string, newval->value); bond->params.ad_select = newval->value; return 0; } static int bond_option_queue_id_set(struct bonding *bond, const struct bond_opt_value *newval) { struct slave *slave, *update_slave; struct net_device *sdev; struct list_head *iter; char *delim; int ret = 0; u16 qid; /* delim will point to queue id if successful */ delim = strchr(newval->string, ':'); if (!delim) goto err_no_cmd; /* Terminate string that points to device name and bump it * up one, so we can read the queue id there. */ *delim = '\0'; if (sscanf(++delim, "%hd\n", &qid) != 1) goto err_no_cmd; /* Check buffer length, valid ifname and queue id */ if (!dev_valid_name(newval->string) || qid > bond->dev->real_num_tx_queues) goto err_no_cmd; /* Get the pointer to that interface if it exists */ sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); if (!sdev) goto err_no_cmd; /* Search for thes slave and check for duplicate qids */ update_slave = NULL; bond_for_each_slave(bond, slave, iter) { if (sdev == slave->dev) /* We don't need to check the matching * slave for dups, since we're overwriting it */ update_slave = slave; else if (qid && qid == slave->queue_id) { goto err_no_cmd; } } if (!update_slave) goto err_no_cmd; /* Actually set the qids for the slave */ WRITE_ONCE(update_slave->queue_id, qid); out: return ret; err_no_cmd: netdev_dbg(bond->dev, "invalid input for queue_id set\n"); ret = -EPERM; goto out; } static int bond_option_slaves_set(struct bonding *bond, const struct bond_opt_value *newval) { char command[IFNAMSIZ + 1] = { 0, }; struct net_device *dev; char *ifname; int ret; sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ ifname = command + 1; if ((strlen(command) <= 1) || (command[0] != '+' && command[0] != '-') || !dev_valid_name(ifname)) goto err_no_cmd; dev = __dev_get_by_name(dev_net(bond->dev), ifname); if (!dev) { netdev_dbg(bond->dev, "interface %s does not exist!\n", ifname); ret = -ENODEV; goto out; } switch (command[0]) { case '+': slave_dbg(bond->dev, dev, "Enslaving interface\n"); ret = bond_enslave(bond->dev, dev, NULL); break; case '-': slave_dbg(bond->dev, dev, "Releasing interface\n"); ret = bond_release(bond->dev, dev); break; default: /* should not run here. */ goto err_no_cmd; } out: return ret; err_no_cmd: netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); ret = -EPERM; goto out; } static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", newval->string, newval->value); bond->params.tlb_dynamic_lb = newval->value; return 0; } static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", newval->value); bond->params.ad_actor_sys_prio = newval->value; bond_3ad_update_ad_actor_settings(bond); return 0; } static int bond_option_actor_port_prio_set(struct bonding *bond, const struct bond_opt_value *newval) { struct slave *slave; slave = bond_slave_get_rtnl(newval->slave_dev); if (!slave) { netdev_dbg(bond->dev, "%s called on NULL slave\n", __func__); return -ENODEV; } netdev_dbg(newval->slave_dev, "Setting actor_port_prio to %llu\n", newval->value); SLAVE_AD_INFO(slave)->port_priority = newval->value; bond_3ad_update_ad_actor_settings(bond); return 0; } static int bond_option_ad_actor_system_set(struct bonding *bond, const struct bond_opt_value *newval) { u8 macaddr[ETH_ALEN]; u8 *mac; if (newval->string) { if (!mac_pton(newval->string, macaddr)) goto err; mac = macaddr; } else { mac = (u8 *)&newval->value; } if (is_multicast_ether_addr(mac)) goto err; netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); ether_addr_copy(bond->params.ad_actor_system, mac); bond_3ad_update_ad_actor_settings(bond); return 0; err: netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); return -EINVAL; } static int bond_option_ad_user_port_key_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", newval->value); bond->params.ad_user_port_key = newval->value; return 0; } static int bond_option_coupled_control_set(struct bonding *bond, const struct bond_opt_value *newval) { netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n", newval->string, newval->value); bond->params.coupled_control = newval->value; return 0; } static int bond_option_broadcast_neigh_set(struct bonding *bond, const struct bond_opt_value *newval) { if (bond->params.broadcast_neighbor == newval->value) return 0; bond->params.broadcast_neighbor = newval->value; if (bond->dev->flags & IFF_UP) { if (bond->params.broadcast_neighbor) static_branch_inc(&bond_bcast_neigh_enabled); else static_branch_dec(&bond_bcast_neigh_enabled); } netdev_dbg(bond->dev, "Setting broadcast_neighbor to %s (%llu)\n", newval->string, newval->value); return 0; } |
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concatenations of ranges * * Copyright (c) 2019-2020 Red Hat GmbH * * Author: Stefano Brivio <sbrivio@redhat.com> */ /** * DOC: Theory of Operation * * * Problem * ------- * * Match packet bytes against entries composed of ranged or non-ranged packet * field specifiers, mapping them to arbitrary references. For example: * * :: * * --- fields ---> * | [net],[port],[net]... => [reference] * entries [net],[port],[net]... => [reference] * | [net],[port],[net]... => [reference] * V ... * * where [net] fields can be IP ranges or netmasks, and [port] fields are port * ranges. Arbitrary packet fields can be matched. * * * Algorithm Overview * ------------------ * * This algorithm is loosely inspired by [Ligatti 2010], and fundamentally * relies on the consideration that every contiguous range in a space of b bits * can be converted into b * 2 netmasks, from Theorem 3 in [Rottenstreich 2010], * as also illustrated in Section 9 of [Kogan 2014]. * * Classification against a number of entries, that require matching given bits * of a packet field, is performed by grouping those bits in sets of arbitrary * size, and classifying packet bits one group at a time. * * Example: * to match the source port (16 bits) of a packet, we can divide those 16 bits * in 4 groups of 4 bits each. Given the entry: * 0000 0001 0101 1001 * and a packet with source port: * 0000 0001 1010 1001 * first and second groups match, but the third doesn't. We conclude that the * packet doesn't match the given entry. * * Translate the set to a sequence of lookup tables, one per field. Each table * has two dimensions: bit groups to be matched for a single packet field, and * all the possible values of said groups (buckets). Input entries are * represented as one or more rules, depending on the number of composing * netmasks for the given field specifier, and a group match is indicated as a * set bit, with number corresponding to the rule index, in all the buckets * whose value matches the entry for a given group. * * Rules are mapped between fields through an array of x, n pairs, with each * item mapping a matched rule to one or more rules. The position of the pair in * the array indicates the matched rule to be mapped to the next field, x * indicates the first rule index in the next field, and n the amount of * next-field rules the current rule maps to. * * The mapping array for the last field maps to the desired references. * * To match, we perform table lookups using the values of grouped packet bits, * and use a sequence of bitwise operations to progressively evaluate rule * matching. * * A stand-alone, reference implementation, also including notes about possible * future optimisations, is available at: * https://pipapo.lameexcu.se/ * * Insertion * --------- * * - For each packet field: * * - divide the b packet bits we want to classify into groups of size t, * obtaining ceil(b / t) groups * * Example: match on destination IP address, with t = 4: 32 bits, 8 groups * of 4 bits each * * - allocate a lookup table with one column ("bucket") for each possible * value of a group, and with one row for each group * * Example: 8 groups, 2^4 buckets: * * :: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 * 1 * 2 * 3 * 4 * 5 * 6 * 7 * * - map the bits we want to classify for the current field, for a given * entry, to a single rule for non-ranged and netmask set items, and to one * or multiple rules for ranges. Ranges are expanded to composing netmasks * by pipapo_expand(). * * Example: 2 entries, 10.0.0.5:1024 and 192.168.1.0-192.168.2.1:2048 * - rule #0: 10.0.0.5 * - rule #1: 192.168.1.0/24 * - rule #2: 192.168.2.0/31 * * - insert references to the rules in the lookup table, selecting buckets * according to bit values of a rule in the given group. This is done by * pipapo_insert(). * * Example: given: * - rule #0: 10.0.0.5 mapping to buckets * < 0 10 0 0 0 0 0 5 > * - rule #1: 192.168.1.0/24 mapping to buckets * < 12 0 10 8 0 1 < 0..15 > < 0..15 > > * - rule #2: 192.168.2.0/31 mapping to buckets * < 12 0 10 8 0 2 0 < 0..1 > > * * these bits are set in the lookup table: * * :: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0 1,2 * 1 1,2 0 * 2 0 1,2 * 3 0 1,2 * 4 0,1,2 * 5 0 1 2 * 6 0,1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 * 7 1,2 1,2 1 1 1 0,1 1 1 1 1 1 1 1 1 1 1 * * - if this is not the last field in the set, fill a mapping array that maps * rules from the lookup table to rules belonging to the same entry in * the next lookup table, done by pipapo_map(). * * Note that as rules map to contiguous ranges of rules, given how netmask * expansion and insertion is performed, &union nft_pipapo_map_bucket stores * this information as pairs of first rule index, rule count. * * Example: 2 entries, 10.0.0.5:1024 and 192.168.1.0-192.168.2.1:2048, * given lookup table #0 for field 0 (see example above): * * :: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0 1,2 * 1 1,2 0 * 2 0 1,2 * 3 0 1,2 * 4 0,1,2 * 5 0 1 2 * 6 0,1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 * 7 1,2 1,2 1 1 1 0,1 1 1 1 1 1 1 1 1 1 1 * * and lookup table #1 for field 1 with: * - rule #0: 1024 mapping to buckets * < 0 0 4 0 > * - rule #1: 2048 mapping to buckets * < 0 0 5 0 > * * :: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0,1 * 1 0,1 * 2 0 1 * 3 0,1 * * we need to map rules for 10.0.0.5 in lookup table #0 (rule #0) to 1024 * in lookup table #1 (rule #0) and rules for 192.168.1.0-192.168.2.1 * (rules #1, #2) to 2048 in lookup table #2 (rule #1): * * :: * * rule indices in current field: 0 1 2 * map to rules in next field: 0 1 1 * * - if this is the last field in the set, fill a mapping array that maps * rules from the last lookup table to element pointers, also done by * pipapo_map(). * * Note that, in this implementation, we have two elements (start, end) for * each entry. The pointer to the end element is stored in this array, and * the pointer to the start element is linked from it. * * Example: entry 10.0.0.5:1024 has a corresponding &struct nft_pipapo_elem * pointer, 0x66, and element for 192.168.1.0-192.168.2.1:2048 is at 0x42. * From the rules of lookup table #1 as mapped above: * * :: * * rule indices in last field: 0 1 * map to elements: 0x66 0x42 * * * Matching * -------- * * We use a result bitmap, with the size of a single lookup table bucket, to * represent the matching state that applies at every algorithm step. This is * done by pipapo_lookup(). * * - For each packet field: * * - start with an all-ones result bitmap (res_map in pipapo_lookup()) * * - perform a lookup into the table corresponding to the current field, * for each group, and at every group, AND the current result bitmap with * the value from the lookup table bucket * * :: * * Example: 192.168.1.5 < 12 0 10 8 0 1 0 5 >, with lookup table from * insertion examples. * Lookup table buckets are at least 3 bits wide, we'll assume 8 bits for * convenience in this example. Initial result bitmap is 0xff, the steps * below show the value of the result bitmap after each group is processed: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0 1,2 * result bitmap is now: 0xff & 0x6 [bucket 12] = 0x6 * * 1 1,2 0 * result bitmap is now: 0x6 & 0x6 [bucket 0] = 0x6 * * 2 0 1,2 * result bitmap is now: 0x6 & 0x6 [bucket 10] = 0x6 * * 3 0 1,2 * result bitmap is now: 0x6 & 0x6 [bucket 8] = 0x6 * * 4 0,1,2 * result bitmap is now: 0x6 & 0x7 [bucket 0] = 0x6 * * 5 0 1 2 * result bitmap is now: 0x6 & 0x2 [bucket 1] = 0x2 * * 6 0,1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 * result bitmap is now: 0x2 & 0x7 [bucket 0] = 0x2 * * 7 1,2 1,2 1 1 1 0,1 1 1 1 1 1 1 1 1 1 1 * final result bitmap for this field is: 0x2 & 0x3 [bucket 5] = 0x2 * * - at the next field, start with a new, all-zeroes result bitmap. For each * bit set in the previous result bitmap, fill the new result bitmap * (fill_map in pipapo_lookup()) with the rule indices from the * corresponding buckets of the mapping field for this field, done by * pipapo_refill() * * Example: with mapping table from insertion examples, with the current * result bitmap from the previous example, 0x02: * * :: * * rule indices in current field: 0 1 2 * map to rules in next field: 0 1 1 * * the new result bitmap will be 0x02: rule 1 was set, and rule 1 will be * set. * * We can now extend this example to cover the second iteration of the step * above (lookup and AND bitmap): assuming the port field is * 2048 < 0 0 5 0 >, with starting result bitmap 0x2, and lookup table * for "port" field from pre-computation example: * * :: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0,1 * 1 0,1 * 2 0 1 * 3 0,1 * * operations are: 0x2 & 0x3 [bucket 0] & 0x3 [bucket 0] & 0x2 [bucket 5] * & 0x3 [bucket 0], resulting bitmap is 0x2. * * - if this is the last field in the set, look up the value from the mapping * array corresponding to the final result bitmap * * Example: 0x2 resulting bitmap from 192.168.1.5:2048, mapping array for * last field from insertion example: * * :: * * rule indices in last field: 0 1 * map to elements: 0x66 0x42 * * the matching element is at 0x42. * * * References * ---------- * * [Ligatti 2010] * A Packet-classification Algorithm for Arbitrary Bitmask Rules, with * Automatic Time-space Tradeoffs * Jay Ligatti, Josh Kuhn, and Chris Gage. * Proceedings of the IEEE International Conference on Computer * Communication Networks (ICCCN), August 2010. * https://www.cse.usf.edu/~ligatti/papers/grouper-conf.pdf * * [Rottenstreich 2010] * Worst-Case TCAM Rule Expansion * Ori Rottenstreich and Isaac Keslassy. * 2010 Proceedings IEEE INFOCOM, San Diego, CA, 2010. * http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.212.4592&rep=rep1&type=pdf * * [Kogan 2014] * SAX-PAC (Scalable And eXpressive PAcket Classification) * Kirill Kogan, Sergey Nikolenko, Ori Rottenstreich, William Culhane, * and Patrick Eugster. * Proceedings of the 2014 ACM conference on SIGCOMM, August 2014. * https://www.sigcomm.org/sites/default/files/ccr/papers/2014/August/2619239-2626294.pdf */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/netlink.h> #include <linux/netfilter.h> #include <linux/netfilter/nf_tables.h> #include <net/netfilter/nf_tables_core.h> #include <uapi/linux/netfilter/nf_tables.h> #include <linux/bitmap.h> #include <linux/bitops.h> #include "nft_set_pipapo_avx2.h" #include "nft_set_pipapo.h" /** * pipapo_refill() - For each set bit, set bits from selected mapping table item * @map: Bitmap to be scanned for set bits * @len: Length of bitmap in longs * @rules: Number of rules in field * @dst: Destination bitmap * @mt: Mapping table containing bit set specifiers * @match_only: Find a single bit and return, don't fill * * Iteration over set bits with __builtin_ctzl(): Daniel Lemire, public domain. * * For each bit set in map, select the bucket from mapping table with index * corresponding to the position of the bit set. Use start bit and amount of * bits specified in bucket to fill region in dst. * * Return: -1 on no match, bit position on 'match_only', 0 otherwise. */ int pipapo_refill(unsigned long *map, unsigned int len, unsigned int rules, unsigned long *dst, const union nft_pipapo_map_bucket *mt, bool match_only) { unsigned long bitset; unsigned int k; int ret = -1; for (k = 0; k < len; k++) { bitset = map[k]; while (bitset) { unsigned long t = bitset & -bitset; int r = __builtin_ctzl(bitset); int i = k * BITS_PER_LONG + r; if (unlikely(i >= rules)) { map[k] = 0; return -1; } if (match_only) { bitmap_clear(map, i, 1); return i; } ret = 0; bitmap_set(dst, mt[i].to, mt[i].n); bitset ^= t; } map[k] = 0; } return ret; } /** * pipapo_get_slow() - Get matching element reference given key data * @m: storage containing the set elements * @data: Key data to be matched against existing elements * @genmask: If set, check that element is active in given genmask * @tstamp: timestamp to check for expired elements * * For more details, see DOC: Theory of Operation. * * This is the main lookup function. It matches key data against either * the working match set or the uncommitted copy, depending on what the * caller passed to us. * nft_pipapo_get (lookup from userspace/control plane) and nft_pipapo_lookup * (datapath lookup) pass the active copy. * The insertion path will pass the uncommitted working copy. * * Return: pointer to &struct nft_pipapo_elem on match, NULL otherwise. */ static struct nft_pipapo_elem *pipapo_get_slow(const struct nft_pipapo_match *m, const u8 *data, u8 genmask, u64 tstamp) { unsigned long *res_map, *fill_map, *map; struct nft_pipapo_scratch *scratch; const struct nft_pipapo_field *f; bool map_index; int i; local_bh_disable(); scratch = *raw_cpu_ptr(m->scratch); if (unlikely(!scratch)) goto out; __local_lock_nested_bh(&scratch->bh_lock); map_index = scratch->map_index; map = NFT_PIPAPO_LT_ALIGN(&scratch->__map[0]); res_map = map + (map_index ? m->bsize_max : 0); fill_map = map + (map_index ? 0 : m->bsize_max); pipapo_resmap_init(m, res_map); nft_pipapo_for_each_field(f, i, m) { bool last = i == m->field_count - 1; int b; /* For each bit group: select lookup table bucket depending on * packet bytes value, then AND bucket value */ if (likely(f->bb == 8)) pipapo_and_field_buckets_8bit(f, res_map, data); else pipapo_and_field_buckets_4bit(f, res_map, data); NFT_PIPAPO_GROUP_BITS_ARE_8_OR_4; data += f->groups / NFT_PIPAPO_GROUPS_PER_BYTE(f); /* Now populate the bitmap for the next field, unless this is * the last field, in which case return the matched 'ext' * pointer if any. * * Now res_map contains the matching bitmap, and fill_map is the * bitmap for the next field. */ next_match: b = pipapo_refill(res_map, f->bsize, f->rules, fill_map, f->mt, last); if (b < 0) { scratch->map_index = map_index; __local_unlock_nested_bh(&scratch->bh_lock); local_bh_enable(); return NULL; } if (last) { struct nft_pipapo_elem *e; e = f->mt[b].e; if (unlikely(__nft_set_elem_expired(&e->ext, tstamp) || !nft_set_elem_active(&e->ext, genmask))) goto next_match; /* Last field: we're just returning the key without * filling the initial bitmap for the next field, so the * current inactive bitmap is clean and can be reused as * *next* bitmap (not initial) for the next packet. */ scratch->map_index = map_index; __local_unlock_nested_bh(&scratch->bh_lock); local_bh_enable(); return e; } /* Swap bitmap indices: res_map is the initial bitmap for the * next field, and fill_map is guaranteed to be all-zeroes at * this point. */ map_index = !map_index; swap(res_map, fill_map); data += NFT_PIPAPO_GROUPS_PADDING(f); } __local_unlock_nested_bh(&scratch->bh_lock); out: local_bh_enable(); return NULL; } /** * pipapo_get() - Get matching element reference given key data * @m: Storage containing the set elements * @data: Key data to be matched against existing elements * @genmask: If set, check that element is active in given genmask * @tstamp: Timestamp to check for expired elements * * This is a dispatcher function, either calling out the generic C * implementation or, if available, the AVX2 one. * This helper is only called from the control plane, with either RCU * read lock or transaction mutex held. * * Return: pointer to &struct nft_pipapo_elem on match, NULL otherwise. */ static struct nft_pipapo_elem *pipapo_get(const struct nft_pipapo_match *m, const u8 *data, u8 genmask, u64 tstamp) { struct nft_pipapo_elem *e; local_bh_disable(); #if defined(CONFIG_X86_64) && !defined(CONFIG_UML) if (boot_cpu_has(X86_FEATURE_AVX2) && irq_fpu_usable()) { e = pipapo_get_avx2(m, data, genmask, tstamp); local_bh_enable(); return e; } #endif e = pipapo_get_slow(m, data, genmask, tstamp); local_bh_enable(); return e; } /** * nft_pipapo_lookup() - Dataplane fronted for main lookup function * @net: Network namespace * @set: nftables API set representation * @key: pointer to nft registers containing key data * * This function is called from the data path. It will search for * an element matching the given key in the current active copy. * Unlike other set types, this uses 0 instead of nft_genmask_cur(). * * This is because new (future) elements are not reachable from * priv->match, they get added to priv->clone instead. * When the commit phase flips the generation bitmask, the * 'now old' entries are skipped but without the 'now current' * elements becoming visible. Using nft_genmask_cur() thus creates * inconsistent state: matching old entries get skipped but thew * newly matching entries are unreachable. * * GENMASK_ANY doesn't work for the same reason: old-gen entries get * skipped, new-gen entries are only reachable from priv->clone. * * nft_pipapo_commit swaps ->clone and ->match shortly after the * genbit flip. As ->clone doesn't contain the old entries in the first * place, lookup will only find the now-current ones. * * Return: ntables API extension pointer or NULL if no match. */ const struct nft_set_ext * nft_pipapo_lookup(const struct net *net, const struct nft_set *set, const u32 *key) { struct nft_pipapo *priv = nft_set_priv(set); const struct nft_pipapo_match *m; const struct nft_pipapo_elem *e; m = rcu_dereference(priv->match); e = pipapo_get_slow(m, (const u8 *)key, 0, get_jiffies_64()); return e ? &e->ext : NULL; } /** * nft_pipapo_get() - Get matching element reference given key data * @net: Network namespace * @set: nftables API set representation * @elem: nftables API element representation containing key data * @flags: Unused * * This function is called from the control plane path under * RCU read lock. * * Return: set element private pointer or ERR_PTR(-ENOENT). */ static struct nft_elem_priv * nft_pipapo_get(const struct net *net, const struct nft_set *set, const struct nft_set_elem *elem, unsigned int flags) { struct nft_pipapo *priv = nft_set_priv(set); struct nft_pipapo_match *m = rcu_dereference(priv->match); struct nft_pipapo_elem *e; e = pipapo_get(m, (const u8 *)elem->key.val.data, nft_genmask_cur(net), get_jiffies_64()); if (!e) return ERR_PTR(-ENOENT); return &e->priv; } /** * pipapo_realloc_mt() - Reallocate mapping table if needed upon resize * @f: Field containing mapping table * @old_rules: Amount of existing mapped rules * @rules: Amount of new rules to map * * Return: 0 on success, negative error code on failure. */ static int pipapo_realloc_mt(struct nft_pipapo_field *f, unsigned int old_rules, unsigned int rules) { union nft_pipapo_map_bucket *new_mt = NULL, *old_mt = f->mt; const unsigned int extra = PAGE_SIZE / sizeof(*new_mt); unsigned int rules_alloc = rules; might_sleep(); if (unlikely(rules == 0)) goto out_free; /* growing and enough space left, no action needed */ if (rules > old_rules && f->rules_alloc > rules) return 0; /* downsize and extra slack has not grown too large */ if (rules < old_rules) { unsigned int remove = f->rules_alloc - rules; if (remove < (2u * extra)) return 0; } /* If set needs more than one page of memory for rules then * allocate another extra page to avoid frequent reallocation. */ if (rules > extra && check_add_overflow(rules, extra, &rules_alloc)) return -EOVERFLOW; if (rules_alloc > (INT_MAX / sizeof(*new_mt))) return -ENOMEM; new_mt = kvmalloc_array(rules_alloc, sizeof(*new_mt), GFP_KERNEL_ACCOUNT); if (!new_mt) return -ENOMEM; if (old_mt) memcpy(new_mt, old_mt, min(old_rules, rules) * sizeof(*new_mt)); if (rules > old_rules) { memset(new_mt + old_rules, 0, (rules - old_rules) * sizeof(*new_mt)); } out_free: f->rules_alloc = rules_alloc; f->mt = new_mt; kvfree(old_mt); return 0; } /** * lt_calculate_size() - Get storage size for lookup table with overflow check * @groups: Amount of bit groups * @bb: Number of bits grouped together in lookup table buckets * @bsize: Size of each bucket in lookup table, in longs * * Return: allocation size including alignment overhead, negative on overflow */ static ssize_t lt_calculate_size(unsigned int groups, unsigned int bb, unsigned int bsize) { ssize_t ret = groups * NFT_PIPAPO_BUCKETS(bb) * sizeof(long); if (check_mul_overflow(ret, bsize, &ret)) return -1; if (check_add_overflow(ret, NFT_PIPAPO_ALIGN_HEADROOM, &ret)) return -1; if (ret > INT_MAX) return -1; return ret; } /** * pipapo_resize() - Resize lookup or mapping table, or both * @f: Field containing lookup and mapping tables * @old_rules: Previous amount of rules in field * @rules: New amount of rules * * Increase, decrease or maintain tables size depending on new amount of rules, * and copy data over. In case the new size is smaller, throw away data for * highest-numbered rules. * * Return: 0 on success, -ENOMEM on allocation failure. */ static int pipapo_resize(struct nft_pipapo_field *f, unsigned int old_rules, unsigned int rules) { long *new_lt = NULL, *new_p, *old_lt = f->lt, *old_p; unsigned int new_bucket_size, copy; int group, bucket, err; ssize_t lt_size; if (rules >= NFT_PIPAPO_RULE0_MAX) return -ENOSPC; new_bucket_size = DIV_ROUND_UP(rules, BITS_PER_LONG); #ifdef NFT_PIPAPO_ALIGN new_bucket_size = roundup(new_bucket_size, NFT_PIPAPO_ALIGN / sizeof(*new_lt)); #endif if (new_bucket_size == f->bsize) goto mt; if (new_bucket_size > f->bsize) copy = f->bsize; else copy = new_bucket_size; lt_size = lt_calculate_size(f->groups, f->bb, new_bucket_size); if (lt_size < 0) return -ENOMEM; new_lt = kvzalloc(lt_size, GFP_KERNEL_ACCOUNT); if (!new_lt) return -ENOMEM; new_p = NFT_PIPAPO_LT_ALIGN(new_lt); old_p = NFT_PIPAPO_LT_ALIGN(old_lt); for (group = 0; group < f->groups; group++) { for (bucket = 0; bucket < NFT_PIPAPO_BUCKETS(f->bb); bucket++) { memcpy(new_p, old_p, copy * sizeof(*new_p)); new_p += copy; old_p += copy; if (new_bucket_size > f->bsize) new_p += new_bucket_size - f->bsize; else old_p += f->bsize - new_bucket_size; } } mt: err = pipapo_realloc_mt(f, old_rules, rules); if (err) { kvfree(new_lt); return err; } if (new_lt) { f->bsize = new_bucket_size; f->lt = new_lt; kvfree(old_lt); } return 0; } /** * pipapo_bucket_set() - Set rule bit in bucket given group and group value * @f: Field containing lookup table * @rule: Rule index * @group: Group index * @v: Value of bit group */ static void pipapo_bucket_set(struct nft_pipapo_field *f, int rule, int group, int v) { unsigned long *pos; pos = NFT_PIPAPO_LT_ALIGN(f->lt); pos += f->bsize * NFT_PIPAPO_BUCKETS(f->bb) * group; pos += f->bsize * v; __set_bit(rule, pos); } /** * pipapo_lt_4b_to_8b() - Switch lookup table group width from 4 bits to 8 bits * @old_groups: Number of current groups * @bsize: Size of one bucket, in longs * @old_lt: Pointer to the current lookup table * @new_lt: Pointer to the new, pre-allocated lookup table * * Each bucket with index b in the new lookup table, belonging to group g, is * filled with the bit intersection between: * - bucket with index given by the upper 4 bits of b, from group g, and * - bucket with index given by the lower 4 bits of b, from group g + 1 * * That is, given buckets from the new lookup table N(x, y) and the old lookup * table O(x, y), with x bucket index, and y group index: * * N(b, g) := O(b / 16, g) & O(b % 16, g + 1) * * This ensures equivalence of the matching results on lookup. Two examples in * pictures: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ... 254 255 * 0 ^ * 1 | ^ * ... ( & ) | * / \ | * / \ .-( & )-. * / bucket \ | | * group 0 / 1 2 3 \ 4 5 6 7 8 9 10 11 12 13 |14 15 | * 0 / \ | | * 1 \ | | * 2 | --' * 3 '- * ... */ static void pipapo_lt_4b_to_8b(int old_groups, int bsize, unsigned long *old_lt, unsigned long *new_lt) { int g, b, i; for (g = 0; g < old_groups / 2; g++) { int src_g0 = g * 2, src_g1 = g * 2 + 1; for (b = 0; b < NFT_PIPAPO_BUCKETS(8); b++) { int src_b0 = b / NFT_PIPAPO_BUCKETS(4); int src_b1 = b % NFT_PIPAPO_BUCKETS(4); int src_i0 = src_g0 * NFT_PIPAPO_BUCKETS(4) + src_b0; int src_i1 = src_g1 * NFT_PIPAPO_BUCKETS(4) + src_b1; for (i = 0; i < bsize; i++) { *new_lt = old_lt[src_i0 * bsize + i] & old_lt[src_i1 * bsize + i]; new_lt++; } } } } /** * pipapo_lt_8b_to_4b() - Switch lookup table group width from 8 bits to 4 bits * @old_groups: Number of current groups * @bsize: Size of one bucket, in longs * @old_lt: Pointer to the current lookup table * @new_lt: Pointer to the new, pre-allocated lookup table * * Each bucket with index b in the new lookup table, belonging to group g, is * filled with the bit union of: * - all the buckets with index such that the upper four bits of the lower byte * equal b, from group g, with g odd * - all the buckets with index such that the lower four bits equal b, from * group g, with g even * * That is, given buckets from the new lookup table N(x, y) and the old lookup * table O(x, y), with x bucket index, and y group index: * * - with g odd: N(b, g) := U(O(x, g) for each x : x = (b & 0xf0) >> 4) * - with g even: N(b, g) := U(O(x, g) for each x : x = b & 0x0f) * * where U() denotes the arbitrary union operation (binary OR of n terms). This * ensures equivalence of the matching results on lookup. */ static void pipapo_lt_8b_to_4b(int old_groups, int bsize, unsigned long *old_lt, unsigned long *new_lt) { int g, b, bsrc, i; memset(new_lt, 0, old_groups * 2 * NFT_PIPAPO_BUCKETS(4) * bsize * sizeof(unsigned long)); for (g = 0; g < old_groups * 2; g += 2) { int src_g = g / 2; for (b = 0; b < NFT_PIPAPO_BUCKETS(4); b++) { for (bsrc = NFT_PIPAPO_BUCKETS(8) * src_g; bsrc < NFT_PIPAPO_BUCKETS(8) * (src_g + 1); bsrc++) { if (((bsrc & 0xf0) >> 4) != b) continue; for (i = 0; i < bsize; i++) new_lt[i] |= old_lt[bsrc * bsize + i]; } new_lt += bsize; } for (b = 0; b < NFT_PIPAPO_BUCKETS(4); b++) { for (bsrc = NFT_PIPAPO_BUCKETS(8) * src_g; bsrc < NFT_PIPAPO_BUCKETS(8) * (src_g + 1); bsrc++) { if ((bsrc & 0x0f) != b) continue; for (i = 0; i < bsize; i++) new_lt[i] |= old_lt[bsrc * bsize + i]; } new_lt += bsize; } } } /** * pipapo_lt_bits_adjust() - Adjust group size for lookup table if needed * @f: Field containing lookup table */ static void pipapo_lt_bits_adjust(struct nft_pipapo_field *f) { unsigned int groups, bb; unsigned long *new_lt; ssize_t lt_size; lt_size = f->groups * NFT_PIPAPO_BUCKETS(f->bb) * f->bsize * sizeof(*f->lt); if (f->bb == NFT_PIPAPO_GROUP_BITS_SMALL_SET && lt_size > NFT_PIPAPO_LT_SIZE_HIGH) { groups = f->groups * 2; bb = NFT_PIPAPO_GROUP_BITS_LARGE_SET; lt_size = lt_calculate_size(groups, bb, f->bsize); if (lt_size < 0) return; } else if (f->bb == NFT_PIPAPO_GROUP_BITS_LARGE_SET && lt_size < NFT_PIPAPO_LT_SIZE_LOW) { groups = f->groups / 2; bb = NFT_PIPAPO_GROUP_BITS_SMALL_SET; lt_size = lt_calculate_size(groups, bb, f->bsize); if (lt_size < 0) return; /* Don't increase group width if the resulting lookup table size * would exceed the upper size threshold for a "small" set. */ if (lt_size > NFT_PIPAPO_LT_SIZE_HIGH) return; } else { return; } new_lt = kvzalloc(lt_size, GFP_KERNEL_ACCOUNT); if (!new_lt) return; NFT_PIPAPO_GROUP_BITS_ARE_8_OR_4; if (f->bb == 4 && bb == 8) { pipapo_lt_4b_to_8b(f->groups, f->bsize, NFT_PIPAPO_LT_ALIGN(f->lt), NFT_PIPAPO_LT_ALIGN(new_lt)); } else if (f->bb == 8 && bb == 4) { pipapo_lt_8b_to_4b(f->groups, f->bsize, NFT_PIPAPO_LT_ALIGN(f->lt), NFT_PIPAPO_LT_ALIGN(new_lt)); } else { BUG(); } f->groups = groups; f->bb = bb; kvfree(f->lt); f->lt = new_lt; } /** * pipapo_insert() - Insert new rule in field given input key and mask length * @f: Field containing lookup table * @k: Input key for classification, without nftables padding * @mask_bits: Length of mask; matches field length for non-ranged entry * * Insert a new rule reference in lookup buckets corresponding to k and * mask_bits. * * Return: 1 on success (one rule inserted), negative error code on failure. */ static int pipapo_insert(struct nft_pipapo_field *f, const uint8_t *k, int mask_bits) { unsigned int rule = f->rules, group, ret, bit_offset = 0; ret = pipapo_resize(f, f->rules, f->rules + 1); if (ret) return ret; f->rules++; for (group = 0; group < f->groups; group++) { int i, v; u8 mask; v = k[group / (BITS_PER_BYTE / f->bb)]; v &= GENMASK(BITS_PER_BYTE - bit_offset - 1, 0); v >>= (BITS_PER_BYTE - bit_offset) - f->bb; bit_offset += f->bb; bit_offset %= BITS_PER_BYTE; if (mask_bits >= (group + 1) * f->bb) { /* Not masked */ pipapo_bucket_set(f, rule, group, v); } else if (mask_bits <= group * f->bb) { /* Completely masked */ for (i = 0; i < NFT_PIPAPO_BUCKETS(f->bb); i++) pipapo_bucket_set(f, rule, group, i); } else { /* The mask limit falls on this group */ mask = GENMASK(f->bb - 1, 0); mask >>= mask_bits - group * f->bb; for (i = 0; i < NFT_PIPAPO_BUCKETS(f->bb); i++) { if ((i & ~mask) == (v & ~mask)) pipapo_bucket_set(f, rule, group, i); } } } pipapo_lt_bits_adjust(f); return 1; } /** * pipapo_step_diff() - Check if setting @step bit in netmask would change it * @base: Mask we are expanding * @step: Step bit for given expansion step * @len: Total length of mask space (set and unset bits), bytes * * Convenience function for mask expansion. * * Return: true if step bit changes mask (i.e. isn't set), false otherwise. */ static bool pipapo_step_diff(u8 *base, int step, int len) { /* Network order, byte-addressed */ #ifdef __BIG_ENDIAN__ return !(BIT(step % BITS_PER_BYTE) & base[step / BITS_PER_BYTE]); #else return !(BIT(step % BITS_PER_BYTE) & base[len - 1 - step / BITS_PER_BYTE]); #endif } /** * pipapo_step_after_end() - Check if mask exceeds range end with given step * @base: Mask we are expanding * @end: End of range * @step: Step bit for given expansion step, highest bit to be set * @len: Total length of mask space (set and unset bits), bytes * * Convenience function for mask expansion. * * Return: true if mask exceeds range setting step bits, false otherwise. */ static bool pipapo_step_after_end(const u8 *base, const u8 *end, int step, int len) { u8 tmp[NFT_PIPAPO_MAX_BYTES]; int i; memcpy(tmp, base, len); /* Network order, byte-addressed */ for (i = 0; i <= step; i++) #ifdef __BIG_ENDIAN__ tmp[i / BITS_PER_BYTE] |= BIT(i % BITS_PER_BYTE); #else tmp[len - 1 - i / BITS_PER_BYTE] |= BIT(i % BITS_PER_BYTE); #endif return memcmp(tmp, end, len) > 0; } /** * pipapo_base_sum() - Sum step bit to given len-sized netmask base with carry * @base: Netmask base * @step: Step bit to sum * @len: Netmask length, bytes */ static void pipapo_base_sum(u8 *base, int step, int len) { bool carry = false; int i; /* Network order, byte-addressed */ #ifdef __BIG_ENDIAN__ for (i = step / BITS_PER_BYTE; i < len; i++) { #else for (i = len - 1 - step / BITS_PER_BYTE; i >= 0; i--) { #endif if (carry) base[i]++; else base[i] += 1 << (step % BITS_PER_BYTE); if (base[i]) break; carry = true; } } /** * pipapo_expand() - Expand to composing netmasks, insert into lookup table * @f: Field containing lookup table * @start: Start of range * @end: End of range * @len: Length of value in bits * * Expand range to composing netmasks and insert corresponding rule references * in lookup buckets. * * Return: number of inserted rules on success, negative error code on failure. */ static int pipapo_expand(struct nft_pipapo_field *f, const u8 *start, const u8 *end, int len) { int step, masks = 0, bytes = DIV_ROUND_UP(len, BITS_PER_BYTE); u8 base[NFT_PIPAPO_MAX_BYTES]; memcpy(base, start, bytes); while (memcmp(base, end, bytes) <= 0) { int err; step = 0; while (pipapo_step_diff(base, step, bytes)) { if (pipapo_step_after_end(base, end, step, bytes)) break; step++; if (step >= len) { if (!masks) { err = pipapo_insert(f, base, 0); if (err < 0) return err; masks = 1; } goto out; } } err = pipapo_insert(f, base, len - step); if (err < 0) return err; masks++; pipapo_base_sum(base, step, bytes); } out: return masks; } /** * pipapo_map() - Insert rules in mapping tables, mapping them between fields * @m: Matching data, including mapping table * @map: Table of rule maps: array of first rule and amount of rules * in next field a given rule maps to, for each field * @e: For last field, nft_set_ext pointer matching rules map to */ static void pipapo_map(struct nft_pipapo_match *m, union nft_pipapo_map_bucket map[NFT_PIPAPO_MAX_FIELDS], struct nft_pipapo_elem *e) { struct nft_pipapo_field *f; int i, j; for (i = 0, f = m->f; i < m->field_count - 1; i++, f++) { for (j = 0; j < map[i].n; j++) { f->mt[map[i].to + j].to = map[i + 1].to; f->mt[map[i].to + j].n = map[i + 1].n; } } /* Last field: map to ext instead of mapping to next field */ for (j = 0; j < map[i].n; j++) f->mt[map[i].to + j].e = e; } /** * pipapo_free_scratch() - Free per-CPU map at original address * @m: Matching data * @cpu: CPU number */ static void pipapo_free_scratch(const struct nft_pipapo_match *m, unsigned int cpu) { struct nft_pipapo_scratch *s; s = *per_cpu_ptr(m->scratch, cpu); kvfree(s); } /** * pipapo_realloc_scratch() - Reallocate scratch maps for partial match results * @clone: Copy of matching data with pending insertions and deletions * @bsize_max: Maximum bucket size, scratch maps cover two buckets * * Return: 0 on success, -ENOMEM on failure. */ static int pipapo_realloc_scratch(struct nft_pipapo_match *clone, unsigned long bsize_max) { int i; for_each_possible_cpu(i) { struct nft_pipapo_scratch *scratch; scratch = kvzalloc_node(struct_size(scratch, __map, bsize_max * 2) + NFT_PIPAPO_ALIGN_HEADROOM, GFP_KERNEL_ACCOUNT, cpu_to_node(i)); if (!scratch) { /* On failure, there's no need to undo previous * allocations: this means that some scratch maps have * a bigger allocated size now (this is only called on * insertion), but the extra space won't be used by any * CPU as new elements are not inserted and m->bsize_max * is not updated. */ return -ENOMEM; } pipapo_free_scratch(clone, i); local_lock_init(&scratch->bh_lock); *per_cpu_ptr(clone->scratch, i) = scratch; } return 0; } static bool nft_pipapo_transaction_mutex_held(const struct nft_set *set) { #ifdef CONFIG_PROVE_LOCKING const struct net *net = read_pnet(&set->net); return lockdep_is_held(&nft_pernet(net)->commit_mutex); #else return true; #endif } static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old); /** * pipapo_maybe_clone() - Build clone for pending data changes, if not existing * @set: nftables API set representation * * Return: newly created or existing clone, if any. NULL on allocation failure */ static struct nft_pipapo_match *pipapo_maybe_clone(const struct nft_set *set) { struct nft_pipapo *priv = nft_set_priv(set); struct nft_pipapo_match *m; if (priv->clone) return priv->clone; m = rcu_dereference_protected(priv->match, nft_pipapo_transaction_mutex_held(set)); priv->clone = pipapo_clone(m); return priv->clone; } /** * nft_pipapo_insert() - Validate and insert ranged elements * @net: Network namespace * @set: nftables API set representation * @elem: nftables API element representation containing key data * @elem_priv: Filled with pointer to &struct nft_set_ext in inserted element * * Return: 0 on success, error pointer on failure. */ static int nft_pipapo_insert(const struct net *net, const struct nft_set *set, const struct nft_set_elem *elem, struct nft_elem_priv **elem_priv) { const struct nft_set_ext *ext = nft_set_elem_ext(set, elem->priv); union nft_pipapo_map_bucket rulemap[NFT_PIPAPO_MAX_FIELDS]; const u8 *start = (const u8 *)elem->key.val.data, *end; struct nft_pipapo_match *m = pipapo_maybe_clone(set); u8 genmask = nft_genmask_next(net); struct nft_pipapo_elem *e, *dup; u64 tstamp = nft_net_tstamp(net); struct nft_pipapo_field *f; const u8 *start_p, *end_p; int i, bsize_max, err = 0; if (!m) return -ENOMEM; if (nft_set_ext_exists(ext, NFT_SET_EXT_KEY_END)) end = (const u8 *)nft_set_ext_key_end(ext)->data; else end = start; dup = pipapo_get(m, start, genmask, tstamp); if (dup) { /* Check if we already have the same exact entry */ const struct nft_data *dup_key, *dup_end; dup_key = nft_set_ext_key(&dup->ext); if (nft_set_ext_exists(&dup->ext, NFT_SET_EXT_KEY_END)) dup_end = nft_set_ext_key_end(&dup->ext); else dup_end = dup_key; if (!memcmp(start, dup_key->data, sizeof(*dup_key->data)) && !memcmp(end, dup_end->data, sizeof(*dup_end->data))) { *elem_priv = &dup->priv; return -EEXIST; } return -ENOTEMPTY; } /* Look for partially overlapping entries */ dup = pipapo_get(m, end, nft_genmask_next(net), tstamp); if (dup) { *elem_priv = &dup->priv; return -ENOTEMPTY; } /* Validate */ start_p = start; end_p = end; /* some helpers return -1, or 0 >= for valid rule pos, * so we cannot support more than INT_MAX rules at this time. */ BUILD_BUG_ON(NFT_PIPAPO_RULE0_MAX > INT_MAX); nft_pipapo_for_each_field(f, i, m) { if (f->rules >= NFT_PIPAPO_RULE0_MAX) return -ENOSPC; if (memcmp(start_p, end_p, f->groups / NFT_PIPAPO_GROUPS_PER_BYTE(f)) > 0) return -EINVAL; start_p += NFT_PIPAPO_GROUPS_PADDED_SIZE(f); end_p += NFT_PIPAPO_GROUPS_PADDED_SIZE(f); } /* Insert */ bsize_max = m->bsize_max; nft_pipapo_for_each_field(f, i, m) { int ret; rulemap[i].to = f->rules; ret = memcmp(start, end, f->groups / NFT_PIPAPO_GROUPS_PER_BYTE(f)); if (!ret) ret = pipapo_insert(f, start, f->groups * f->bb); else ret = pipapo_expand(f, start, end, f->groups * f->bb); if (ret < 0) return ret; if (f->bsize > bsize_max) bsize_max = f->bsize; rulemap[i].n = ret; start += NFT_PIPAPO_GROUPS_PADDED_SIZE(f); end += NFT_PIPAPO_GROUPS_PADDED_SIZE(f); } if (!*get_cpu_ptr(m->scratch) || bsize_max > m->bsize_max) { put_cpu_ptr(m->scratch); err = pipapo_realloc_scratch(m, bsize_max); if (err) return err; m->bsize_max = bsize_max; } else { put_cpu_ptr(m->scratch); } e = nft_elem_priv_cast(elem->priv); *elem_priv = &e->priv; pipapo_map(m, rulemap, e); return 0; } /** * pipapo_clone() - Clone matching data to create new working copy * @old: Existing matching data * * Return: copy of matching data passed as 'old' or NULL. */ static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old) { struct nft_pipapo_field *dst, *src; struct nft_pipapo_match *new; int i; new = kmalloc(struct_size(new, f, old->field_count), GFP_KERNEL_ACCOUNT); if (!new) return NULL; new->field_count = old->field_count; new->bsize_max = old->bsize_max; new->scratch = alloc_percpu(*new->scratch); if (!new->scratch) goto out_scratch; for_each_possible_cpu(i) *per_cpu_ptr(new->scratch, i) = NULL; if (pipapo_realloc_scratch(new, old->bsize_max)) goto out_scratch_realloc; rcu_head_init(&new->rcu); src = old->f; dst = new->f; for (i = 0; i < old->field_count; i++) { unsigned long *new_lt; ssize_t lt_size; memcpy(dst, src, offsetof(struct nft_pipapo_field, lt)); lt_size = lt_calculate_size(src->groups, src->bb, src->bsize); if (lt_size < 0) goto out_lt; new_lt = kvzalloc(lt_size, GFP_KERNEL_ACCOUNT); if (!new_lt) goto out_lt; dst->lt = new_lt; memcpy(NFT_PIPAPO_LT_ALIGN(new_lt), NFT_PIPAPO_LT_ALIGN(src->lt), src->bsize * sizeof(*dst->lt) * src->groups * NFT_PIPAPO_BUCKETS(src->bb)); if (src->rules > 0) { if (src->rules_alloc > (INT_MAX / sizeof(*src->mt))) goto out_mt; dst->mt = kvmalloc_array(src->rules_alloc, sizeof(*src->mt), GFP_KERNEL_ACCOUNT); if (!dst->mt) goto out_mt; memcpy(dst->mt, src->mt, src->rules * sizeof(*src->mt)); } else { dst->mt = NULL; dst->rules_alloc = 0; } src++; dst++; } return new; out_mt: kvfree(dst->lt); out_lt: for (dst--; i > 0; i--) { kvfree(dst->mt); kvfree(dst->lt); dst--; } out_scratch_realloc: for_each_possible_cpu(i) pipapo_free_scratch(new, i); out_scratch: free_percpu(new->scratch); kfree(new); return NULL; } /** * pipapo_rules_same_key() - Get number of rules originated from the same entry * @f: Field containing mapping table * @first: Index of first rule in set of rules mapping to same entry * * Using the fact that all rules in a field that originated from the same entry * will map to the same set of rules in the next field, or to the same element * reference, return the cardinality of the set of rules that originated from * the same entry as the rule with index @first, @first rule included. * * In pictures: * rules * field #0 0 1 2 3 4 * map to: 0 1 2-4 2-4 5-9 * . . ....... . ... * | | | | \ \ * | | | | \ \ * | | | | \ \ * ' ' ' ' ' \ * in field #1 0 1 2 3 4 5 ... * * if this is called for rule 2 on field #0, it will return 3, as also rules 2 * and 3 in field 0 map to the same set of rules (2, 3, 4) in the next field. * * For the last field in a set, we can rely on associated entries to map to the * same element references. * * Return: Number of rules that originated from the same entry as @first. */ static unsigned int pipapo_rules_same_key(struct nft_pipapo_field *f, unsigned int first) { struct nft_pipapo_elem *e = NULL; /* Keep gcc happy */ unsigned int r; for (r = first; r < f->rules; r++) { if (r != first && e != f->mt[r].e) return r - first; e = f->mt[r].e; } if (r != first) return r - first; return 0; } /** * pipapo_unmap() - Remove rules from mapping tables, renumber remaining ones * @mt: Mapping array * @rules: Original amount of rules in mapping table * @start: First rule index to be removed * @n: Amount of rules to be removed * @to_offset: First rule index, in next field, this group of rules maps to * @is_last: If this is the last field, delete reference from mapping array * * This is used to unmap rules from the mapping table for a single field, * maintaining consistency and compactness for the existing ones. * * In pictures: let's assume that we want to delete rules 2 and 3 from the * following mapping array: * * rules * 0 1 2 3 4 * map to: 4-10 4-10 11-15 11-15 16-18 * * the result will be: * * rules * 0 1 2 * map to: 4-10 4-10 11-13 * * for fields before the last one. In case this is the mapping table for the * last field in a set, and rules map to pointers to &struct nft_pipapo_elem: * * rules * 0 1 2 3 4 * element pointers: 0x42 0x42 0x33 0x33 0x44 * * the result will be: * * rules * 0 1 2 * element pointers: 0x42 0x42 0x44 */ static void pipapo_unmap(union nft_pipapo_map_bucket *mt, unsigned int rules, unsigned int start, unsigned int n, unsigned int to_offset, bool is_last) { int i; memmove(mt + start, mt + start + n, (rules - start - n) * sizeof(*mt)); memset(mt + rules - n, 0, n * sizeof(*mt)); if (is_last) return; for (i = start; i < rules - n; i++) mt[i].to -= to_offset; } /** * pipapo_drop() - Delete entry from lookup and mapping tables, given rule map * @m: Matching data * @rulemap: Table of rule maps, arrays of first rule and amount of rules * in next field a given entry maps to, for each field * * For each rule in lookup table buckets mapping to this set of rules, drop * all bits set in lookup table mapping. In pictures, assuming we want to drop * rules 0 and 1 from this lookup table: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0 1,2 * 1 1,2 0 * 2 0 1,2 * 3 0 1,2 * 4 0,1,2 * 5 0 1 2 * 6 0,1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 * 7 1,2 1,2 1 1 1 0,1 1 1 1 1 1 1 1 1 1 1 * * rule 2 becomes rule 0, and the result will be: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 0 * 1 0 * 2 0 * 3 0 * 4 0 * 5 0 * 6 0 * 7 0 0 * * once this is done, call unmap() to drop all the corresponding rule references * from mapping tables. */ static void pipapo_drop(struct nft_pipapo_match *m, union nft_pipapo_map_bucket rulemap[]) { struct nft_pipapo_field *f; int i; nft_pipapo_for_each_field(f, i, m) { int g; for (g = 0; g < f->groups; g++) { unsigned long *pos; int b; pos = NFT_PIPAPO_LT_ALIGN(f->lt) + g * NFT_PIPAPO_BUCKETS(f->bb) * f->bsize; for (b = 0; b < NFT_PIPAPO_BUCKETS(f->bb); b++) { bitmap_cut(pos, pos, rulemap[i].to, rulemap[i].n, f->bsize * BITS_PER_LONG); pos += f->bsize; } } pipapo_unmap(f->mt, f->rules, rulemap[i].to, rulemap[i].n, rulemap[i + 1].n, i == m->field_count - 1); if (pipapo_resize(f, f->rules, f->rules - rulemap[i].n)) { /* We can ignore this, a failure to shrink tables down * doesn't make tables invalid. */ ; } f->rules -= rulemap[i].n; pipapo_lt_bits_adjust(f); } } static void nft_pipapo_gc_deactivate(struct net *net, struct nft_set *set, struct nft_pipapo_elem *e) { nft_setelem_data_deactivate(net, set, &e->priv); } /** * pipapo_gc() - Drop expired entries from set, destroy start and end elements * @set: nftables API set representation * @m: Matching data */ static void pipapo_gc(struct nft_set *set, struct nft_pipapo_match *m) { struct nft_pipapo *priv = nft_set_priv(set); struct net *net = read_pnet(&set->net); unsigned int rules_f0, first_rule = 0; u64 tstamp = nft_net_tstamp(net); struct nft_pipapo_elem *e; struct nft_trans_gc *gc; gc = nft_trans_gc_alloc(set, 0, GFP_KERNEL); if (!gc) return; while ((rules_f0 = pipapo_rules_same_key(m->f, first_rule))) { union nft_pipapo_map_bucket rulemap[NFT_PIPAPO_MAX_FIELDS]; const struct nft_pipapo_field *f; unsigned int i, start, rules_fx; start = first_rule; rules_fx = rules_f0; nft_pipapo_for_each_field(f, i, m) { rulemap[i].to = start; rulemap[i].n = rules_fx; if (i < m->field_count - 1) { rules_fx = f->mt[start].n; start = f->mt[start].to; } } /* Pick the last field, and its last index */ f--; i--; e = f->mt[rulemap[i].to].e; /* synchronous gc never fails, there is no need to set on * NFT_SET_ELEM_DEAD_BIT. */ if (__nft_set_elem_expired(&e->ext, tstamp)) { gc = nft_trans_gc_queue_sync(gc, GFP_KERNEL); if (!gc) return; nft_pipapo_gc_deactivate(net, set, e); pipapo_drop(m, rulemap); nft_trans_gc_elem_add(gc, e); /* And check again current first rule, which is now the * first we haven't checked. */ } else { first_rule += rules_f0; } } gc = nft_trans_gc_catchall_sync(gc); if (gc) { nft_trans_gc_queue_sync_done(gc); priv->last_gc = jiffies; } } /** * pipapo_free_fields() - Free per-field tables contained in matching data * @m: Matching data */ static void pipapo_free_fields(struct nft_pipapo_match *m) { struct nft_pipapo_field *f; int i; nft_pipapo_for_each_field(f, i, m) { kvfree(f->lt); kvfree(f->mt); } } static void pipapo_free_match(struct nft_pipapo_match *m) { int i; for_each_possible_cpu(i) pipapo_free_scratch(m, i); free_percpu(m->scratch); pipapo_free_fields(m); kfree(m); } /** * pipapo_reclaim_match - RCU callback to free fields from old matching data * @rcu: RCU head */ static void pipapo_reclaim_match(struct rcu_head *rcu) { struct nft_pipapo_match *m; m = container_of(rcu, struct nft_pipapo_match, rcu); pipapo_free_match(m); } /** * nft_pipapo_commit() - Replace lookup data with current working copy * @set: nftables API set representation * * While at it, check if we should perform garbage collection on the working * copy before committing it for lookup, and don't replace the table if the * working copy doesn't have pending changes. * * We also need to create a new working copy for subsequent insertions and * deletions. */ static void nft_pipapo_commit(struct nft_set *set) { struct nft_pipapo *priv = nft_set_priv(set); struct nft_pipapo_match *old; if (!priv->clone) return; if (time_after_eq(jiffies, priv->last_gc + nft_set_gc_interval(set))) pipapo_gc(set, priv->clone); old = rcu_replace_pointer(priv->match, priv->clone, nft_pipapo_transaction_mutex_held(set)); priv->clone = NULL; if (old) call_rcu(&old->rcu, pipapo_reclaim_match); } static void nft_pipapo_abort(const struct nft_set *set) { struct nft_pipapo *priv = nft_set_priv(set); if (!priv->clone) return; pipapo_free_match(priv->clone); priv->clone = NULL; } /** * nft_pipapo_activate() - Mark element reference as active given key, commit * @net: Network namespace * @set: nftables API set representation * @elem_priv: nftables API element representation containing key data * * On insertion, elements are added to a copy of the matching data currently * in use for lookups, and not directly inserted into current lookup data. Both * nft_pipapo_insert() and nft_pipapo_activate() are called once for each * element, hence we can't purpose either one as a real commit operation. */ static void nft_pipapo_activate(const struct net *net, const struct nft_set *set, struct nft_elem_priv *elem_priv) { struct nft_pipapo_elem *e = nft_elem_priv_cast(elem_priv); nft_clear(net, &e->ext); } /** * nft_pipapo_deactivate() - Search for element and make it inactive * @net: Network namespace * @set: nftables API set representation * @elem: nftables API element representation containing key data * * Return: deactivated element if found, NULL otherwise. */ static struct nft_elem_priv * nft_pipapo_deactivate(const struct net *net, const struct nft_set *set, const struct nft_set_elem *elem) { struct nft_pipapo_match *m = pipapo_maybe_clone(set); struct nft_pipapo_elem *e; /* removal must occur on priv->clone, if we are low on memory * we have no choice and must fail the removal request. */ if (!m) return NULL; e = pipapo_get(m, (const u8 *)elem->key.val.data, nft_genmask_next(net), nft_net_tstamp(net)); if (!e) return NULL; nft_set_elem_change_active(net, set, &e->ext); return &e->priv; } /** * nft_pipapo_flush() - make element inactive * @net: Network namespace * @set: nftables API set representation * @elem_priv: nftables API element representation containing key data * * This is functionally the same as nft_pipapo_deactivate(), with a slightly * different interface, and it's also called once for each element in a set * being flushed, so we can't implement, strictly speaking, a flush operation, * which would otherwise be as simple as allocating an empty copy of the * matching data. * * Note that we could in theory do that, mark the set as flushed, and ignore * subsequent calls, but we would leak all the elements after the first one, * because they wouldn't then be freed as result of API calls. * * Return: true if element was found and deactivated. */ static void nft_pipapo_flush(const struct net *net, const struct nft_set *set, struct nft_elem_priv *elem_priv) { struct nft_pipapo_elem *e = nft_elem_priv_cast(elem_priv); nft_set_elem_change_active(net, set, &e->ext); } /** * pipapo_get_boundaries() - Get byte interval for associated rules * @f: Field including lookup table * @first_rule: First rule (lowest index) * @rule_count: Number of associated rules * @left: Byte expression for left boundary (start of range) * @right: Byte expression for right boundary (end of range) * * Given the first rule and amount of rules that originated from the same entry, * build the original range associated with the entry, and calculate the length * of the originating netmask. * * In pictures: * * bucket * group 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 * 0 1,2 * 1 1,2 * 2 1,2 * 3 1,2 * 4 1,2 * 5 1 2 * 6 1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 * 7 1,2 1,2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 * * this is the lookup table corresponding to the IPv4 range * 192.168.1.0-192.168.2.1, which was expanded to the two composing netmasks, * rule #1: 192.168.1.0/24, and rule #2: 192.168.2.0/31. * * This function fills @left and @right with the byte values of the leftmost * and rightmost bucket indices for the lowest and highest rule indices, * respectively. If @first_rule is 1 and @rule_count is 2, we obtain, in * nibbles: * left: < 12, 0, 10, 8, 0, 1, 0, 0 > * right: < 12, 0, 10, 8, 0, 2, 2, 1 > * corresponding to bytes: * left: < 192, 168, 1, 0 > * right: < 192, 168, 2, 1 > * with mask length irrelevant here, unused on return, as the range is already * defined by its start and end points. The mask length is relevant for a single * ranged entry instead: if @first_rule is 1 and @rule_count is 1, we ignore * rule 2 above: @left becomes < 192, 168, 1, 0 >, @right becomes * < 192, 168, 1, 255 >, and the mask length, calculated from the distances * between leftmost and rightmost bucket indices for each group, would be 24. * * Return: mask length, in bits. */ static int pipapo_get_boundaries(struct nft_pipapo_field *f, int first_rule, int rule_count, u8 *left, u8 *right) { int g, mask_len = 0, bit_offset = 0; u8 *l = left, *r = right; for (g = 0; g < f->groups; g++) { int b, x0, x1; x0 = -1; x1 = -1; for (b = 0; b < NFT_PIPAPO_BUCKETS(f->bb); b++) { unsigned long *pos; pos = NFT_PIPAPO_LT_ALIGN(f->lt) + (g * NFT_PIPAPO_BUCKETS(f->bb) + b) * f->bsize; if (test_bit(first_rule, pos) && x0 == -1) x0 = b; if (test_bit(first_rule + rule_count - 1, pos)) x1 = b; } *l |= x0 << (BITS_PER_BYTE - f->bb - bit_offset); *r |= x1 << (BITS_PER_BYTE - f->bb - bit_offset); bit_offset += f->bb; if (bit_offset >= BITS_PER_BYTE) { bit_offset %= BITS_PER_BYTE; l++; r++; } if (x1 - x0 == 0) mask_len += 4; else if (x1 - x0 == 1) mask_len += 3; else if (x1 - x0 == 3) mask_len += 2; else if (x1 - x0 == 7) mask_len += 1; } return mask_len; } /** * pipapo_match_field() - Match rules against byte ranges * @f: Field including the lookup table * @first_rule: First of associated rules originating from same entry * @rule_count: Amount of associated rules * @start: Start of range to be matched * @end: End of range to be matched * * Return: true on match, false otherwise. */ static bool pipapo_match_field(struct nft_pipapo_field *f, int first_rule, int rule_count, const u8 *start, const u8 *end) { u8 right[NFT_PIPAPO_MAX_BYTES] = { 0 }; u8 left[NFT_PIPAPO_MAX_BYTES] = { 0 }; pipapo_get_boundaries(f, first_rule, rule_count, left, right); return !memcmp(start, left, f->groups / NFT_PIPAPO_GROUPS_PER_BYTE(f)) && !memcmp(end, right, f->groups / NFT_PIPAPO_GROUPS_PER_BYTE(f)); } /** * nft_pipapo_remove() - Remove element given key, commit * @net: Network namespace * @set: nftables API set representation * @elem_priv: nftables API element representation containing key data * * Similarly to nft_pipapo_activate(), this is used as commit operation by the * API, but it's called once per element in the pending transaction, so we can't * implement this as a single commit operation. Closest we can get is to remove * the matched element here, if any, and commit the updated matching data. */ static void nft_pipapo_remove(const struct net *net, const struct nft_set *set, struct nft_elem_priv *elem_priv) { struct nft_pipapo *priv = nft_set_priv(set); struct nft_pipapo_match *m = priv->clone; unsigned int rules_f0, first_rule = 0; struct nft_pipapo_elem *e; const u8 *data; e = nft_elem_priv_cast(elem_priv); data = (const u8 *)nft_set_ext_key(&e->ext); while ((rules_f0 = pipapo_rules_same_key(m->f, first_rule))) { union nft_pipapo_map_bucket rulemap[NFT_PIPAPO_MAX_FIELDS]; const u8 *match_start, *match_end; struct nft_pipapo_field *f; int i, start, rules_fx; match_start = data; if (nft_set_ext_exists(&e->ext, NFT_SET_EXT_KEY_END)) match_end = (const u8 *)nft_set_ext_key_end(&e->ext)->data; else match_end = data; start = first_rule; rules_fx = rules_f0; nft_pipapo_for_each_field(f, i, m) { bool last = i == m->field_count - 1; if (!pipapo_match_field(f, start, rules_fx, match_start, match_end)) break; rulemap[i].to = start; rulemap[i].n = rules_fx; rules_fx = f->mt[start].n; start = f->mt[start].to; match_start += NFT_PIPAPO_GROUPS_PADDED_SIZE(f); match_end += NFT_PIPAPO_GROUPS_PADDED_SIZE(f); if (last && f->mt[rulemap[i].to].e == e) { pipapo_drop(m, rulemap); return; } } first_rule += rules_f0; } WARN_ON_ONCE(1); /* elem_priv not found */ } /** * nft_pipapo_do_walk() - Walk over elements in m * @ctx: nftables API context * @set: nftables API set representation * @m: matching data pointing to key mapping array * @iter: Iterator * * As elements are referenced in the mapping array for the last field, directly * scan that array: there's no need to follow rule mappings from the first * field. @m is protected either by RCU read lock or by transaction mutex. */ static void nft_pipapo_do_walk(const struct nft_ctx *ctx, struct nft_set *set, const struct nft_pipapo_match *m, struct nft_set_iter *iter) { const struct nft_pipapo_field *f; unsigned int i, r; for (i = 0, f = m->f; i < m->field_count - 1; i++, f++) ; for (r = 0; r < f->rules; r++) { struct nft_pipapo_elem *e; if (r < f->rules - 1 && f->mt[r + 1].e == f->mt[r].e) continue; if (iter->count < iter->skip) goto cont; e = f->mt[r].e; iter->err = iter->fn(ctx, set, iter, &e->priv); if (iter->err < 0) return; cont: iter->count++; } } /** * nft_pipapo_walk() - Walk over elements * @ctx: nftables API context * @set: nftables API set representation * @iter: Iterator * * Test if destructive action is needed or not, clone active backend if needed * and call the real function to work on the data. */ static void nft_pipapo_walk(const struct nft_ctx *ctx, struct nft_set *set, struct nft_set_iter *iter) { struct nft_pipapo *priv = nft_set_priv(set); const struct nft_pipapo_match *m; switch (iter->type) { case NFT_ITER_UPDATE: m = pipapo_maybe_clone(set); if (!m) { iter->err = -ENOMEM; return; } nft_pipapo_do_walk(ctx, set, m, iter); break; case NFT_ITER_READ: rcu_read_lock(); m = rcu_dereference(priv->match); nft_pipapo_do_walk(ctx, set, m, iter); rcu_read_unlock(); break; default: iter->err = -EINVAL; WARN_ON_ONCE(1); break; } } /** * nft_pipapo_privsize() - Return the size of private data for the set * @nla: netlink attributes, ignored as size doesn't depend on them * @desc: Set description, ignored as size doesn't depend on it * * Return: size of private data for this set implementation, in bytes */ static u64 nft_pipapo_privsize(const struct nlattr * const nla[], const struct nft_set_desc *desc) { return sizeof(struct nft_pipapo); } /** * nft_pipapo_estimate() - Set size, space and lookup complexity * @desc: Set description, element count and field description used * @features: Flags: NFT_SET_INTERVAL needs to be there * @est: Storage for estimation data * * Return: true if set description is compatible, false otherwise */ static bool nft_pipapo_estimate(const struct nft_set_desc *desc, u32 features, struct nft_set_estimate *est) { if (!(features & NFT_SET_INTERVAL) || desc->field_count < NFT_PIPAPO_MIN_FIELDS) return false; est->size = pipapo_estimate_size(desc); if (!est->size) return false; est->lookup = NFT_SET_CLASS_O_LOG_N; est->space = NFT_SET_CLASS_O_N; return true; } /** * nft_pipapo_init() - Initialise data for a set instance * @set: nftables API set representation * @desc: Set description * @nla: netlink attributes * * Validate number and size of fields passed as NFTA_SET_DESC_CONCAT netlink * attributes, initialise internal set parameters, current instance of matching * data and a copy for subsequent insertions. * * Return: 0 on success, negative error code on failure. */ static int nft_pipapo_init(const struct nft_set *set, const struct nft_set_desc *desc, const struct nlattr * const nla[]) { struct nft_pipapo *priv = nft_set_priv(set); struct nft_pipapo_match *m; struct nft_pipapo_field *f; int err, i, field_count; BUILD_BUG_ON(offsetof(struct nft_pipapo_elem, priv) != 0); field_count = desc->field_count ? : 1; BUILD_BUG_ON(NFT_PIPAPO_MAX_FIELDS > 255); BUILD_BUG_ON(NFT_PIPAPO_MAX_FIELDS != NFT_REG32_COUNT); if (field_count > NFT_PIPAPO_MAX_FIELDS) return -EINVAL; m = kmalloc(struct_size(m, f, field_count), GFP_KERNEL); if (!m) return -ENOMEM; m->field_count = field_count; m->bsize_max = 0; m->scratch = alloc_percpu(struct nft_pipapo_scratch *); if (!m->scratch) { err = -ENOMEM; goto out_scratch; } for_each_possible_cpu(i) *per_cpu_ptr(m->scratch, i) = NULL; rcu_head_init(&m->rcu); nft_pipapo_for_each_field(f, i, m) { unsigned int len = desc->field_len[i] ? : set->klen; /* f->groups is u8 */ BUILD_BUG_ON((NFT_PIPAPO_MAX_BYTES * BITS_PER_BYTE / NFT_PIPAPO_GROUP_BITS_LARGE_SET) >= 256); f->bb = NFT_PIPAPO_GROUP_BITS_INIT; f->groups = len * NFT_PIPAPO_GROUPS_PER_BYTE(f); priv->width += round_up(len, sizeof(u32)); f->bsize = 0; f->rules = 0; f->rules_alloc = 0; f->lt = NULL; f->mt = NULL; } rcu_assign_pointer(priv->match, m); return 0; out_scratch: kfree(m); return err; } /** * nft_set_pipapo_match_destroy() - Destroy elements from key mapping array * @ctx: context * @set: nftables API set representation * @m: matching data pointing to key mapping array */ static void nft_set_pipapo_match_destroy(const struct nft_ctx *ctx, const struct nft_set *set, struct nft_pipapo_match *m) { struct nft_pipapo_field *f; unsigned int i, r; for (i = 0, f = m->f; i < m->field_count - 1; i++, f++) ; for (r = 0; r < f->rules; r++) { struct nft_pipapo_elem *e; if (r < f->rules - 1 && f->mt[r + 1].e == f->mt[r].e) continue; e = f->mt[r].e; nf_tables_set_elem_destroy(ctx, set, &e->priv); } } /** * nft_pipapo_destroy() - Free private data for set and all committed elements * @ctx: context * @set: nftables API set representation */ static void nft_pipapo_destroy(const struct nft_ctx *ctx, const struct nft_set *set) { struct nft_pipapo *priv = nft_set_priv(set); struct nft_pipapo_match *m; m = rcu_dereference_protected(priv->match, true); if (priv->clone) { nft_set_pipapo_match_destroy(ctx, set, priv->clone); pipapo_free_match(priv->clone); priv->clone = NULL; } else { nft_set_pipapo_match_destroy(ctx, set, m); } pipapo_free_match(m); } /** * nft_pipapo_gc_init() - Initialise garbage collection * @set: nftables API set representation * * Instead of actually setting up a periodic work for garbage collection, as * this operation requires a swap of matching data with the working copy, we'll * do that opportunistically with other commit operations if the interval is * elapsed, so we just need to set the current jiffies timestamp here. */ static void nft_pipapo_gc_init(const struct nft_set *set) { struct nft_pipapo *priv = nft_set_priv(set); priv->last_gc = jiffies; } const struct nft_set_type nft_set_pipapo_type = { .features = NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_OBJECT | NFT_SET_TIMEOUT, .ops = { .lookup = nft_pipapo_lookup, .insert = nft_pipapo_insert, .activate = nft_pipapo_activate, .deactivate = nft_pipapo_deactivate, .flush = nft_pipapo_flush, .remove = nft_pipapo_remove, .walk = nft_pipapo_walk, .get = nft_pipapo_get, .privsize = nft_pipapo_privsize, .estimate = nft_pipapo_estimate, .init = nft_pipapo_init, .destroy = nft_pipapo_destroy, .gc_init = nft_pipapo_gc_init, .commit = nft_pipapo_commit, .abort = nft_pipapo_abort, .elemsize = offsetof(struct nft_pipapo_elem, ext), }, }; #if defined(CONFIG_X86_64) && !defined(CONFIG_UML) const struct nft_set_type nft_set_pipapo_avx2_type = { .features = NFT_SET_INTERVAL | NFT_SET_MAP | NFT_SET_OBJECT | NFT_SET_TIMEOUT, .ops = { .lookup = nft_pipapo_avx2_lookup, .insert = nft_pipapo_insert, .activate = nft_pipapo_activate, .deactivate = nft_pipapo_deactivate, .flush = nft_pipapo_flush, .remove = nft_pipapo_remove, .walk = nft_pipapo_walk, .get = nft_pipapo_get, .privsize = nft_pipapo_privsize, .estimate = nft_pipapo_avx2_estimate, .init = nft_pipapo_init, .destroy = nft_pipapo_destroy, .gc_init = nft_pipapo_gc_init, .commit = nft_pipapo_commit, .abort = nft_pipapo_abort, .elemsize = offsetof(struct nft_pipapo_elem, ext), }, }; #endif |
| 1 90 84 73 1 76 235 7 13 94 198 3 3 6 1 2 4 8 2 5 4 28 1 18 11 74 74 57 8 2 55 57 2 57 2 7 51 154 117 70 3 1 2 2 8 4 1 1 3 97 25 72 2 3 1 2 12 1 74 2 7 7 3 4 70 13 46 1 2 11 7 8 9 33 284 96 110 109 7 102 17 | 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 | // SPDX-License-Identifier: GPL-2.0-only /* * linux/fs/hfsplus/super.c * * Copyright (C) 2001 * Brad Boyer (flar@allandria.com) * (C) 2003 Ardis Technologies <roman@ardistech.com> * */ #include <linux/module.h> #include <linux/init.h> #include <linux/pagemap.h> #include <linux/blkdev.h> #include <linux/backing-dev.h> #include <linux/fs.h> #include <linux/fs_context.h> #include <linux/slab.h> #include <linux/vfs.h> #include <linux/nls.h> static struct inode *hfsplus_alloc_inode(struct super_block *sb); static void hfsplus_free_inode(struct inode *inode); #include "hfsplus_fs.h" #include "xattr.h" static int hfsplus_system_read_inode(struct inode *inode) { struct hfsplus_vh *vhdr = HFSPLUS_SB(inode->i_sb)->s_vhdr; switch (inode->i_ino) { case HFSPLUS_EXT_CNID: hfsplus_inode_read_fork(inode, &vhdr->ext_file); inode->i_mapping->a_ops = &hfsplus_btree_aops; break; case HFSPLUS_CAT_CNID: hfsplus_inode_read_fork(inode, &vhdr->cat_file); inode->i_mapping->a_ops = &hfsplus_btree_aops; break; case HFSPLUS_ALLOC_CNID: hfsplus_inode_read_fork(inode, &vhdr->alloc_file); inode->i_mapping->a_ops = &hfsplus_aops; break; case HFSPLUS_START_CNID: hfsplus_inode_read_fork(inode, &vhdr->start_file); break; case HFSPLUS_ATTR_CNID: hfsplus_inode_read_fork(inode, &vhdr->attr_file); inode->i_mapping->a_ops = &hfsplus_btree_aops; break; default: return -EIO; } return 0; } struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino) { struct hfs_find_data fd; struct inode *inode; int err; inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; atomic_set(&HFSPLUS_I(inode)->opencnt, 0); HFSPLUS_I(inode)->first_blocks = 0; HFSPLUS_I(inode)->clump_blocks = 0; HFSPLUS_I(inode)->alloc_blocks = 0; HFSPLUS_I(inode)->cached_start = U32_MAX; HFSPLUS_I(inode)->cached_blocks = 0; memset(HFSPLUS_I(inode)->first_extents, 0, sizeof(hfsplus_extent_rec)); memset(HFSPLUS_I(inode)->cached_extents, 0, sizeof(hfsplus_extent_rec)); HFSPLUS_I(inode)->extent_state = 0; mutex_init(&HFSPLUS_I(inode)->extents_lock); HFSPLUS_I(inode)->rsrc_inode = NULL; HFSPLUS_I(inode)->create_date = 0; HFSPLUS_I(inode)->linkid = 0; HFSPLUS_I(inode)->flags = 0; HFSPLUS_I(inode)->fs_blocks = 0; HFSPLUS_I(inode)->userflags = 0; HFSPLUS_I(inode)->subfolders = 0; INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list); spin_lock_init(&HFSPLUS_I(inode)->open_dir_lock); HFSPLUS_I(inode)->phys_size = 0; if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || inode->i_ino == HFSPLUS_ROOT_CNID) { err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd); if (!err) { err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd); if (!err) err = hfsplus_cat_read_inode(inode, &fd); hfs_find_exit(&fd); } } else { err = hfsplus_system_read_inode(inode); } if (err) { iget_failed(inode); return ERR_PTR(err); } unlock_new_inode(inode); return inode; } static int hfsplus_system_write_inode(struct inode *inode) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); struct hfsplus_vh *vhdr = sbi->s_vhdr; struct hfsplus_fork_raw *fork; struct hfs_btree *tree = NULL; switch (inode->i_ino) { case HFSPLUS_EXT_CNID: fork = &vhdr->ext_file; tree = sbi->ext_tree; break; case HFSPLUS_CAT_CNID: fork = &vhdr->cat_file; tree = sbi->cat_tree; break; case HFSPLUS_ALLOC_CNID: fork = &vhdr->alloc_file; break; case HFSPLUS_START_CNID: fork = &vhdr->start_file; break; case HFSPLUS_ATTR_CNID: fork = &vhdr->attr_file; tree = sbi->attr_tree; break; default: return -EIO; } if (fork->total_size != cpu_to_be64(inode->i_size)) { set_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags); hfsplus_mark_mdb_dirty(inode->i_sb); } hfsplus_inode_write_fork(inode, fork); if (tree) { int err = hfs_btree_write(tree); if (err) { pr_err("b-tree write err: %d, ino %lu\n", err, inode->i_ino); return err; } } return 0; } static int hfsplus_write_inode(struct inode *inode, struct writeback_control *wbc) { int err; hfs_dbg("ino %lu\n", inode->i_ino); err = hfsplus_ext_write_extent(inode); if (err) return err; if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID || inode->i_ino == HFSPLUS_ROOT_CNID) return hfsplus_cat_write_inode(inode); else return hfsplus_system_write_inode(inode); } static void hfsplus_evict_inode(struct inode *inode) { hfs_dbg("ino %lu\n", inode->i_ino); truncate_inode_pages_final(&inode->i_data); clear_inode(inode); if (HFSPLUS_IS_RSRC(inode)) { HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL; iput(HFSPLUS_I(inode)->rsrc_inode); } } static int hfsplus_sync_fs(struct super_block *sb, int wait) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); struct hfsplus_vh *vhdr = sbi->s_vhdr; int write_backup = 0; int error, error2; if (!wait) return 0; hfs_dbg("starting...\n"); /* * Explicitly write out the special metadata inodes. * * While these special inodes are marked as hashed and written * out peridocically by the flusher threads we redirty them * during writeout of normal inodes, and thus the life lock * prevents us from getting the latest state to disk. */ error = filemap_write_and_wait(sbi->cat_tree->inode->i_mapping); error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping); if (!error) error = error2; if (sbi->attr_tree) { error2 = filemap_write_and_wait(sbi->attr_tree->inode->i_mapping); if (!error) error = error2; } error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping); if (!error) error = error2; mutex_lock(&sbi->vh_mutex); mutex_lock(&sbi->alloc_mutex); vhdr->free_blocks = cpu_to_be32(sbi->free_blocks); vhdr->next_cnid = cpu_to_be32(sbi->next_cnid); vhdr->folder_count = cpu_to_be32(sbi->folder_count); vhdr->file_count = cpu_to_be32(sbi->file_count); hfs_dbg("free_blocks %u, next_cnid %u, folder_count %u, file_count %u\n", sbi->free_blocks, sbi->next_cnid, sbi->folder_count, sbi->file_count); if (test_and_clear_bit(HFSPLUS_SB_WRITEBACKUP, &sbi->flags)) { memcpy(sbi->s_backup_vhdr, sbi->s_vhdr, sizeof(*sbi->s_vhdr)); write_backup = 1; } error2 = hfsplus_submit_bio(sb, sbi->part_start + HFSPLUS_VOLHEAD_SECTOR, sbi->s_vhdr_buf, NULL, REQ_OP_WRITE); if (!error) error = error2; if (!write_backup) goto out; error2 = hfsplus_submit_bio(sb, sbi->part_start + sbi->sect_count - 2, sbi->s_backup_vhdr_buf, NULL, REQ_OP_WRITE); if (!error) error2 = error; out: mutex_unlock(&sbi->alloc_mutex); mutex_unlock(&sbi->vh_mutex); if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags)) blkdev_issue_flush(sb->s_bdev); hfs_dbg("finished: err %d\n", error); return error; } static void delayed_sync_fs(struct work_struct *work) { int err; struct hfsplus_sb_info *sbi; sbi = container_of(work, struct hfsplus_sb_info, sync_work.work); spin_lock(&sbi->work_lock); sbi->work_queued = 0; spin_unlock(&sbi->work_lock); err = hfsplus_sync_fs(sbi->alloc_file->i_sb, 1); if (err) pr_err("delayed sync fs err %d\n", err); } void hfsplus_mark_mdb_dirty(struct super_block *sb) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); unsigned long delay; if (sb_rdonly(sb)) return; spin_lock(&sbi->work_lock); if (!sbi->work_queued) { delay = msecs_to_jiffies(dirty_writeback_interval * 10); queue_delayed_work(system_long_wq, &sbi->sync_work, delay); sbi->work_queued = 1; } spin_unlock(&sbi->work_lock); } static void delayed_free(struct rcu_head *p) { struct hfsplus_sb_info *sbi = container_of(p, struct hfsplus_sb_info, rcu); unload_nls(sbi->nls); kfree(sbi); } static void hfsplus_put_super(struct super_block *sb) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); hfs_dbg("starting...\n"); cancel_delayed_work_sync(&sbi->sync_work); if (!sb_rdonly(sb) && sbi->s_vhdr) { struct hfsplus_vh *vhdr = sbi->s_vhdr; vhdr->modify_date = hfsp_now2mt(); vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_UNMNT); vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_INCNSTNT); hfsplus_sync_fs(sb, 1); } iput(sbi->alloc_file); iput(sbi->hidden_dir); hfs_btree_close(sbi->attr_tree); hfs_btree_close(sbi->cat_tree); hfs_btree_close(sbi->ext_tree); kfree(sbi->s_vhdr_buf); kfree(sbi->s_backup_vhdr_buf); call_rcu(&sbi->rcu, delayed_free); hfs_dbg("finished\n"); } static int hfsplus_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); u64 id = huge_encode_dev(sb->s_bdev->bd_dev); buf->f_type = HFSPLUS_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_blocks = sbi->total_blocks << sbi->fs_shift; buf->f_bfree = sbi->free_blocks << sbi->fs_shift; buf->f_bavail = buf->f_bfree; buf->f_files = 0xFFFFFFFF; buf->f_ffree = 0xFFFFFFFF - sbi->next_cnid; buf->f_fsid = u64_to_fsid(id); buf->f_namelen = HFSPLUS_MAX_STRLEN; return 0; } static int hfsplus_reconfigure(struct fs_context *fc) { struct super_block *sb = fc->root->d_sb; sync_filesystem(sb); if ((bool)(fc->sb_flags & SB_RDONLY) == sb_rdonly(sb)) return 0; if (!(fc->sb_flags & SB_RDONLY)) { struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); struct hfsplus_vh *vhdr = sbi->s_vhdr; if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { pr_warn("filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. leaving read-only.\n"); sb->s_flags |= SB_RDONLY; fc->sb_flags |= SB_RDONLY; } else if (test_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { /* nothing */ } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { pr_warn("filesystem is marked locked, leaving read-only.\n"); sb->s_flags |= SB_RDONLY; fc->sb_flags |= SB_RDONLY; } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) { pr_warn("filesystem is marked journaled, leaving read-only.\n"); sb->s_flags |= SB_RDONLY; fc->sb_flags |= SB_RDONLY; } } return 0; } static const struct super_operations hfsplus_sops = { .alloc_inode = hfsplus_alloc_inode, .free_inode = hfsplus_free_inode, .write_inode = hfsplus_write_inode, .evict_inode = hfsplus_evict_inode, .put_super = hfsplus_put_super, .sync_fs = hfsplus_sync_fs, .statfs = hfsplus_statfs, .show_options = hfsplus_show_options, }; static int hfsplus_fill_super(struct super_block *sb, struct fs_context *fc) { struct hfsplus_vh *vhdr; struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb); hfsplus_cat_entry entry; struct hfs_find_data fd; struct inode *root, *inode; struct qstr str; struct nls_table *nls; u64 last_fs_block, last_fs_page; int silent = fc->sb_flags & SB_SILENT; int err; mutex_init(&sbi->alloc_mutex); mutex_init(&sbi->vh_mutex); spin_lock_init(&sbi->work_lock); INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); err = -EINVAL; if (!sbi->nls) { /* try utf8 first, as this is the old default behaviour */ sbi->nls = load_nls("utf8"); if (!sbi->nls) sbi->nls = load_nls_default(); } /* temporarily use utf8 to correctly find the hidden dir below */ nls = sbi->nls; sbi->nls = load_nls("utf8"); if (!sbi->nls) { pr_err("unable to load nls for utf8\n"); goto out_unload_nls; } /* Grab the volume header */ if (hfsplus_read_wrapper(sb)) { if (!silent) pr_warn("unable to find HFS+ superblock\n"); goto out_unload_nls; } vhdr = sbi->s_vhdr; /* Copy parts of the volume header into the superblock */ sb->s_magic = HFSPLUS_VOLHEAD_SIG; if (be16_to_cpu(vhdr->version) < HFSPLUS_MIN_VERSION || be16_to_cpu(vhdr->version) > HFSPLUS_CURRENT_VERSION) { pr_err("wrong filesystem version\n"); goto out_free_vhdr; } sbi->total_blocks = be32_to_cpu(vhdr->total_blocks); sbi->free_blocks = be32_to_cpu(vhdr->free_blocks); sbi->next_cnid = be32_to_cpu(vhdr->next_cnid); sbi->file_count = be32_to_cpu(vhdr->file_count); sbi->folder_count = be32_to_cpu(vhdr->folder_count); sbi->data_clump_blocks = be32_to_cpu(vhdr->data_clump_sz) >> sbi->alloc_blksz_shift; if (!sbi->data_clump_blocks) sbi->data_clump_blocks = 1; sbi->rsrc_clump_blocks = be32_to_cpu(vhdr->rsrc_clump_sz) >> sbi->alloc_blksz_shift; if (!sbi->rsrc_clump_blocks) sbi->rsrc_clump_blocks = 1; err = -EFBIG; last_fs_block = sbi->total_blocks - 1; last_fs_page = (last_fs_block << sbi->alloc_blksz_shift) >> PAGE_SHIFT; if ((last_fs_block > (sector_t)(~0ULL) >> (sbi->alloc_blksz_shift - 9)) || (last_fs_page > (pgoff_t)(~0ULL))) { pr_err("filesystem size too large\n"); goto out_free_vhdr; } /* Set up operations so we can load metadata */ sb->s_op = &hfsplus_sops; sb->s_maxbytes = MAX_LFS_FILESIZE; if (!(vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_UNMNT))) { pr_warn("Filesystem was not cleanly unmounted, running fsck.hfsplus is recommended. mounting read-only.\n"); sb->s_flags |= SB_RDONLY; } else if (test_and_clear_bit(HFSPLUS_SB_FORCE, &sbi->flags)) { /* nothing */ } else if (vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_SOFTLOCK)) { pr_warn("Filesystem is marked locked, mounting read-only.\n"); sb->s_flags |= SB_RDONLY; } else if ((vhdr->attributes & cpu_to_be32(HFSPLUS_VOL_JOURNALED)) && !sb_rdonly(sb)) { pr_warn("write access to a journaled filesystem is not supported, use the force option at your own risk, mounting read-only.\n"); sb->s_flags |= SB_RDONLY; } err = -EINVAL; /* Load metadata objects (B*Trees) */ sbi->ext_tree = hfs_btree_open(sb, HFSPLUS_EXT_CNID); if (!sbi->ext_tree) { pr_err("failed to load extents file\n"); goto out_free_vhdr; } sbi->cat_tree = hfs_btree_open(sb, HFSPLUS_CAT_CNID); if (!sbi->cat_tree) { pr_err("failed to load catalog file\n"); goto out_close_ext_tree; } atomic_set(&sbi->attr_tree_state, HFSPLUS_EMPTY_ATTR_TREE); if (vhdr->attr_file.total_blocks != 0) { sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID); if (!sbi->attr_tree) { pr_err("failed to load attributes file\n"); goto out_close_cat_tree; } atomic_set(&sbi->attr_tree_state, HFSPLUS_VALID_ATTR_TREE); } sb->s_xattr = hfsplus_xattr_handlers; inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID); if (IS_ERR(inode)) { pr_err("failed to load allocation file\n"); err = PTR_ERR(inode); goto out_close_attr_tree; } sbi->alloc_file = inode; /* Load the root directory */ root = hfsplus_iget(sb, HFSPLUS_ROOT_CNID); if (IS_ERR(root)) { pr_err("failed to load root directory\n"); err = PTR_ERR(root); goto out_put_alloc_file; } set_default_d_op(sb, &hfsplus_dentry_operations); sb->s_root = d_make_root(root); if (!sb->s_root) { err = -ENOMEM; goto out_put_alloc_file; } str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; str.name = HFSP_HIDDENDIR_NAME; err = hfs_find_init(sbi->cat_tree, &fd); if (err) goto out_put_root; err = hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_ROOT_CNID, &str); if (unlikely(err < 0)) goto out_put_root; if (!hfs_brec_read(&fd, &entry, sizeof(entry))) { hfs_find_exit(&fd); if (entry.type != cpu_to_be16(HFSPLUS_FOLDER)) { err = -EIO; goto out_put_root; } inode = hfsplus_iget(sb, be32_to_cpu(entry.folder.id)); if (IS_ERR(inode)) { err = PTR_ERR(inode); goto out_put_root; } sbi->hidden_dir = inode; } else hfs_find_exit(&fd); if (!sb_rdonly(sb)) { /* * H+LX == hfsplusutils, H+Lx == this driver, H+lx is unused * all three are registered with Apple for our use */ vhdr->last_mount_vers = cpu_to_be32(HFSP_MOUNT_VERSION); vhdr->modify_date = hfsp_now2mt(); be32_add_cpu(&vhdr->write_count, 1); vhdr->attributes &= cpu_to_be32(~HFSPLUS_VOL_UNMNT); vhdr->attributes |= cpu_to_be32(HFSPLUS_VOL_INCNSTNT); hfsplus_sync_fs(sb, 1); if (!sbi->hidden_dir) { mutex_lock(&sbi->vh_mutex); sbi->hidden_dir = hfsplus_new_inode(sb, root, S_IFDIR); if (!sbi->hidden_dir) { mutex_unlock(&sbi->vh_mutex); err = -ENOMEM; goto out_put_root; } err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root, &str, sbi->hidden_dir); if (err) { mutex_unlock(&sbi->vh_mutex); goto out_put_hidden_dir; } err = hfsplus_init_security(sbi->hidden_dir, root, &str); if (err == -EOPNOTSUPP) err = 0; /* Operation is not supported. */ else if (err) { /* * Try to delete anyway without * error analysis. */ hfsplus_delete_cat(sbi->hidden_dir->i_ino, root, &str); mutex_unlock(&sbi->vh_mutex); goto out_put_hidden_dir; } mutex_unlock(&sbi->vh_mutex); hfsplus_mark_inode_dirty(sbi->hidden_dir, HFSPLUS_I_CAT_DIRTY); } } unload_nls(sbi->nls); sbi->nls = nls; return 0; out_put_hidden_dir: cancel_delayed_work_sync(&sbi->sync_work); iput(sbi->hidden_dir); out_put_root: dput(sb->s_root); sb->s_root = NULL; out_put_alloc_file: iput(sbi->alloc_file); out_close_attr_tree: hfs_btree_close(sbi->attr_tree); out_close_cat_tree: hfs_btree_close(sbi->cat_tree); out_close_ext_tree: hfs_btree_close(sbi->ext_tree); out_free_vhdr: kfree(sbi->s_vhdr_buf); kfree(sbi->s_backup_vhdr_buf); out_unload_nls: unload_nls(sbi->nls); unload_nls(nls); kfree(sbi); return err; } MODULE_AUTHOR("Brad Boyer"); MODULE_DESCRIPTION("Extended Macintosh Filesystem"); MODULE_LICENSE("GPL"); static struct kmem_cache *hfsplus_inode_cachep; static struct inode *hfsplus_alloc_inode(struct super_block *sb) { struct hfsplus_inode_info *i; i = alloc_inode_sb(sb, hfsplus_inode_cachep, GFP_KERNEL); return i ? &i->vfs_inode : NULL; } static void hfsplus_free_inode(struct inode *inode) { kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode)); } #define HFSPLUS_INODE_SIZE sizeof(struct hfsplus_inode_info) static int hfsplus_get_tree(struct fs_context *fc) { return get_tree_bdev(fc, hfsplus_fill_super); } static void hfsplus_free_fc(struct fs_context *fc) { kfree(fc->s_fs_info); } static const struct fs_context_operations hfsplus_context_ops = { .parse_param = hfsplus_parse_param, .get_tree = hfsplus_get_tree, .reconfigure = hfsplus_reconfigure, .free = hfsplus_free_fc, }; static int hfsplus_init_fs_context(struct fs_context *fc) { struct hfsplus_sb_info *sbi; sbi = kzalloc(sizeof(struct hfsplus_sb_info), GFP_KERNEL); if (!sbi) return -ENOMEM; if (fc->purpose != FS_CONTEXT_FOR_RECONFIGURE) hfsplus_fill_defaults(sbi); fc->s_fs_info = sbi; fc->ops = &hfsplus_context_ops; return 0; } static struct file_system_type hfsplus_fs_type = { .owner = THIS_MODULE, .name = "hfsplus", .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, .init_fs_context = hfsplus_init_fs_context, }; MODULE_ALIAS_FS("hfsplus"); static void hfsplus_init_once(void *p) { struct hfsplus_inode_info *i = p; inode_init_once(&i->vfs_inode); } static int __init init_hfsplus_fs(void) { int err; hfsplus_inode_cachep = kmem_cache_create("hfsplus_icache", HFSPLUS_INODE_SIZE, 0, SLAB_HWCACHE_ALIGN|SLAB_ACCOUNT, hfsplus_init_once); if (!hfsplus_inode_cachep) return -ENOMEM; err = hfsplus_create_attr_tree_cache(); if (err) goto destroy_inode_cache; err = register_filesystem(&hfsplus_fs_type); if (err) goto destroy_attr_tree_cache; return 0; destroy_attr_tree_cache: hfsplus_destroy_attr_tree_cache(); destroy_inode_cache: kmem_cache_destroy(hfsplus_inode_cachep); return err; } static void __exit exit_hfsplus_fs(void) { unregister_filesystem(&hfsplus_fs_type); /* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); hfsplus_destroy_attr_tree_cache(); kmem_cache_destroy(hfsplus_inode_cachep); } module_init(init_hfsplus_fs) module_exit(exit_hfsplus_fs) |
| 4 2 4 4 4 4 4 4 4 4 4 4 4 3 2 2 2 1 1 1 4 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 | // SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018-2020 Christoph Hellwig. * * DMA operations that map physical memory directly without using an IOMMU. */ #include <linux/memblock.h> /* for max_pfn */ #include <linux/export.h> #include <linux/mm.h> #include <linux/dma-map-ops.h> #include <linux/scatterlist.h> #include <linux/pfn.h> #include <linux/vmalloc.h> #include <linux/set_memory.h> #include <linux/slab.h> #include <linux/pci-p2pdma.h> #include "direct.h" /* * Most architectures use ZONE_DMA for the first 16 Megabytes, but some use * it for entirely different regions. In that case the arch code needs to * override the variable below for dma-direct to work properly. */ u64 zone_dma_limit __ro_after_init = DMA_BIT_MASK(24); static inline dma_addr_t phys_to_dma_direct(struct device *dev, phys_addr_t phys) { if (force_dma_unencrypted(dev)) return phys_to_dma_unencrypted(dev, phys); return phys_to_dma(dev, phys); } static inline struct page *dma_direct_to_page(struct device *dev, dma_addr_t dma_addr) { return pfn_to_page(PHYS_PFN(dma_to_phys(dev, dma_addr))); } u64 dma_direct_get_required_mask(struct device *dev) { phys_addr_t phys = (phys_addr_t)(max_pfn - 1) << PAGE_SHIFT; u64 max_dma = phys_to_dma_direct(dev, phys); return (1ULL << (fls64(max_dma) - 1)) * 2 - 1; } static gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 *phys_limit) { u64 dma_limit = min_not_zero( dev->coherent_dma_mask, dev->bus_dma_limit); /* * Optimistically try the zone that the physical address mask falls * into first. If that returns memory that isn't actually addressable * we will fallback to the next lower zone and try again. * * Note that GFP_DMA32 and GFP_DMA are no ops without the corresponding * zones. */ *phys_limit = dma_to_phys(dev, dma_limit); if (*phys_limit <= zone_dma_limit) return GFP_DMA; if (*phys_limit <= DMA_BIT_MASK(32)) return GFP_DMA32; return 0; } bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size) { dma_addr_t dma_addr = phys_to_dma_direct(dev, phys); if (dma_addr == DMA_MAPPING_ERROR) return false; return dma_addr + size - 1 <= min_not_zero(dev->coherent_dma_mask, dev->bus_dma_limit); } static int dma_set_decrypted(struct device *dev, void *vaddr, size_t size) { if (!force_dma_unencrypted(dev)) return 0; return set_memory_decrypted((unsigned long)vaddr, PFN_UP(size)); } static int dma_set_encrypted(struct device *dev, void *vaddr, size_t size) { int ret; if (!force_dma_unencrypted(dev)) return 0; ret = set_memory_encrypted((unsigned long)vaddr, PFN_UP(size)); if (ret) pr_warn_ratelimited("leaking DMA memory that can't be re-encrypted\n"); return ret; } static void __dma_direct_free_pages(struct device *dev, struct page *page, size_t size) { if (swiotlb_free(dev, page, size)) return; dma_free_contiguous(dev, page, size); } static struct page *dma_direct_alloc_swiotlb(struct device *dev, size_t size) { struct page *page = swiotlb_alloc(dev, size); if (page && !dma_coherent_ok(dev, page_to_phys(page), size)) { swiotlb_free(dev, page, size); return NULL; } return page; } static struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, gfp_t gfp, bool allow_highmem) { int node = dev_to_node(dev); struct page *page; u64 phys_limit; WARN_ON_ONCE(!PAGE_ALIGNED(size)); if (is_swiotlb_for_alloc(dev)) return dma_direct_alloc_swiotlb(dev, size); gfp |= dma_direct_optimal_gfp_mask(dev, &phys_limit); page = dma_alloc_contiguous(dev, size, gfp); if (page) { if (dma_coherent_ok(dev, page_to_phys(page), size) && (allow_highmem || !PageHighMem(page))) return page; dma_free_contiguous(dev, page, size); } while ((page = alloc_pages_node(node, gfp, get_order(size))) && !dma_coherent_ok(dev, page_to_phys(page), size)) { __free_pages(page, get_order(size)); if (IS_ENABLED(CONFIG_ZONE_DMA32) && phys_limit < DMA_BIT_MASK(64) && !(gfp & (GFP_DMA32 | GFP_DMA))) gfp |= GFP_DMA32; else if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) gfp = (gfp & ~GFP_DMA32) | GFP_DMA; else return NULL; } return page; } /* * Check if a potentially blocking operations needs to dip into the atomic * pools for the given device/gfp. */ static bool dma_direct_use_pool(struct device *dev, gfp_t gfp) { return !gfpflags_allow_blocking(gfp) && !is_swiotlb_for_alloc(dev); } static void *dma_direct_alloc_from_pool(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp) { struct page *page; u64 phys_limit; void *ret; if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_DMA_COHERENT_POOL))) return NULL; gfp |= dma_direct_optimal_gfp_mask(dev, &phys_limit); page = dma_alloc_from_pool(dev, size, &ret, gfp, dma_coherent_ok); if (!page) return NULL; *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); return ret; } static void *dma_direct_alloc_no_mapping(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp) { struct page *page; page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO, true); if (!page) return NULL; /* remove any dirty cache lines on the kernel alias */ if (!PageHighMem(page)) arch_dma_prep_coherent(page, size); /* return the page pointer as the opaque cookie */ *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); return page; } void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs) { bool remap = false, set_uncached = false; struct page *page; void *ret; size = PAGE_ALIGN(size); if (attrs & DMA_ATTR_NO_WARN) gfp |= __GFP_NOWARN; if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) && !force_dma_unencrypted(dev) && !is_swiotlb_for_alloc(dev)) return dma_direct_alloc_no_mapping(dev, size, dma_handle, gfp); if (!dev_is_dma_coherent(dev)) { if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_ALLOC) && !is_swiotlb_for_alloc(dev)) return arch_dma_alloc(dev, size, dma_handle, gfp, attrs); /* * If there is a global pool, always allocate from it for * non-coherent devices. */ if (IS_ENABLED(CONFIG_DMA_GLOBAL_POOL)) return dma_alloc_from_global_coherent(dev, size, dma_handle); /* * Otherwise we require the architecture to either be able to * mark arbitrary parts of the kernel direct mapping uncached, * or remapped it uncached. */ set_uncached = IS_ENABLED(CONFIG_ARCH_HAS_DMA_SET_UNCACHED); remap = IS_ENABLED(CONFIG_DMA_DIRECT_REMAP); if (!set_uncached && !remap) { pr_warn_once("coherent DMA allocations not supported on this platform.\n"); return NULL; } } /* * Remapping or decrypting memory may block, allocate the memory from * the atomic pools instead if we aren't allowed block. */ if ((remap || force_dma_unencrypted(dev)) && dma_direct_use_pool(dev, gfp)) return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); /* we always manually zero the memory once we are done */ page = __dma_direct_alloc_pages(dev, size, gfp & ~__GFP_ZERO, true); if (!page) return NULL; /* * dma_alloc_contiguous can return highmem pages depending on a * combination the cma= arguments and per-arch setup. These need to be * remapped to return a kernel virtual address. */ if (PageHighMem(page)) { remap = true; set_uncached = false; } if (remap) { pgprot_t prot = dma_pgprot(dev, PAGE_KERNEL, attrs); if (force_dma_unencrypted(dev)) prot = pgprot_decrypted(prot); /* remove any dirty cache lines on the kernel alias */ arch_dma_prep_coherent(page, size); /* create a coherent mapping */ ret = dma_common_contiguous_remap(page, size, prot, __builtin_return_address(0)); if (!ret) goto out_free_pages; } else { ret = page_address(page); if (dma_set_decrypted(dev, ret, size)) goto out_leak_pages; } memset(ret, 0, size); if (set_uncached) { arch_dma_prep_coherent(page, size); ret = arch_dma_set_uncached(ret, size); if (IS_ERR(ret)) goto out_encrypt_pages; } *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); return ret; out_encrypt_pages: if (dma_set_encrypted(dev, page_address(page), size)) return NULL; out_free_pages: __dma_direct_free_pages(dev, page, size); return NULL; out_leak_pages: return NULL; } void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs) { unsigned int page_order = get_order(size); if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) && !force_dma_unencrypted(dev) && !is_swiotlb_for_alloc(dev)) { /* cpu_addr is a struct page cookie, not a kernel address */ dma_free_contiguous(dev, cpu_addr, size); return; } if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_ALLOC) && !dev_is_dma_coherent(dev) && !is_swiotlb_for_alloc(dev)) { arch_dma_free(dev, size, cpu_addr, dma_addr, attrs); return; } if (IS_ENABLED(CONFIG_DMA_GLOBAL_POOL) && !dev_is_dma_coherent(dev)) { if (!dma_release_from_global_coherent(page_order, cpu_addr)) WARN_ON_ONCE(1); return; } /* If cpu_addr is not from an atomic pool, dma_free_from_pool() fails */ if (IS_ENABLED(CONFIG_DMA_COHERENT_POOL) && dma_free_from_pool(dev, cpu_addr, PAGE_ALIGN(size))) return; if (is_vmalloc_addr(cpu_addr)) { vunmap(cpu_addr); } else { if (IS_ENABLED(CONFIG_ARCH_HAS_DMA_CLEAR_UNCACHED)) arch_dma_clear_uncached(cpu_addr, size); if (dma_set_encrypted(dev, cpu_addr, size)) return; } __dma_direct_free_pages(dev, dma_direct_to_page(dev, dma_addr), size); } struct page *dma_direct_alloc_pages(struct device *dev, size_t size, dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp) { struct page *page; void *ret; if (force_dma_unencrypted(dev) && dma_direct_use_pool(dev, gfp)) return dma_direct_alloc_from_pool(dev, size, dma_handle, gfp); page = __dma_direct_alloc_pages(dev, size, gfp, false); if (!page) return NULL; ret = page_address(page); if (dma_set_decrypted(dev, ret, size)) goto out_leak_pages; memset(ret, 0, size); *dma_handle = phys_to_dma_direct(dev, page_to_phys(page)); return page; out_leak_pages: return NULL; } void dma_direct_free_pages(struct device *dev, size_t size, struct page *page, dma_addr_t dma_addr, enum dma_data_direction dir) { void *vaddr = page_address(page); /* If cpu_addr is not from an atomic pool, dma_free_from_pool() fails */ if (IS_ENABLED(CONFIG_DMA_COHERENT_POOL) && dma_free_from_pool(dev, vaddr, size)) return; if (dma_set_encrypted(dev, vaddr, size)) return; __dma_direct_free_pages(dev, page, size); } #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ defined(CONFIG_SWIOTLB) void dma_direct_sync_sg_for_device(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir) { struct scatterlist *sg; int i; for_each_sg(sgl, sg, nents, i) { phys_addr_t paddr = dma_to_phys(dev, sg_dma_address(sg)); swiotlb_sync_single_for_device(dev, paddr, sg->length, dir); if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_device(paddr, sg->length, dir); } } #endif #if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) || \ defined(CONFIG_SWIOTLB) void dma_direct_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir) { struct scatterlist *sg; int i; for_each_sg(sgl, sg, nents, i) { phys_addr_t paddr = dma_to_phys(dev, sg_dma_address(sg)); if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_cpu(paddr, sg->length, dir); swiotlb_sync_single_for_cpu(dev, paddr, sg->length, dir); if (dir == DMA_FROM_DEVICE) arch_dma_mark_clean(paddr, sg->length); } if (!dev_is_dma_coherent(dev)) arch_sync_dma_for_cpu_all(); } /* * Unmaps segments, except for ones marked as pci_p2pdma which do not * require any further action as they contain a bus address. */ void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir, unsigned long attrs) { struct scatterlist *sg; int i; for_each_sg(sgl, sg, nents, i) { if (sg_dma_is_bus_address(sg)) sg_dma_unmark_bus_address(sg); else dma_direct_unmap_phys(dev, sg->dma_address, sg_dma_len(sg), dir, attrs); } } #endif int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents, enum dma_data_direction dir, unsigned long attrs) { struct pci_p2pdma_map_state p2pdma_state = {}; struct scatterlist *sg; int i, ret; for_each_sg(sgl, sg, nents, i) { switch (pci_p2pdma_state(&p2pdma_state, dev, sg_page(sg))) { case PCI_P2PDMA_MAP_THRU_HOST_BRIDGE: /* * Any P2P mapping that traverses the PCI host bridge * must be mapped with CPU physical address and not PCI * bus addresses. */ break; case PCI_P2PDMA_MAP_NONE: sg->dma_address = dma_direct_map_phys(dev, sg_phys(sg), sg->length, dir, attrs); if (sg->dma_address == DMA_MAPPING_ERROR) { ret = -EIO; goto out_unmap; } break; case PCI_P2PDMA_MAP_BUS_ADDR: sg->dma_address = pci_p2pdma_bus_addr_map(&p2pdma_state, sg_phys(sg)); sg_dma_mark_bus_address(sg); continue; default: ret = -EREMOTEIO; goto out_unmap; } sg_dma_len(sg) = sg->length; } return nents; out_unmap: dma_direct_unmap_sg(dev, sgl, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC); return ret; } int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { struct page *page = dma_direct_to_page(dev, dma_addr); int ret; ret = sg_alloc_table(sgt, 1, GFP_KERNEL); if (!ret) sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0); return ret; } bool dma_direct_can_mmap(struct device *dev) { return dev_is_dma_coherent(dev) || IS_ENABLED(CONFIG_DMA_NONCOHERENT_MMAP); } int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size, unsigned long attrs) { unsigned long user_count = vma_pages(vma); unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT; unsigned long pfn = PHYS_PFN(dma_to_phys(dev, dma_addr)); int ret = -ENXIO; vma->vm_page_prot = dma_pgprot(dev, vma->vm_page_prot, attrs); if (force_dma_unencrypted(dev)) vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret)) return ret; if (dma_mmap_from_global_coherent(vma, cpu_addr, size, &ret)) return ret; if (vma->vm_pgoff >= count || user_count > count - vma->vm_pgoff) return -ENXIO; return remap_pfn_range(vma, vma->vm_start, pfn + vma->vm_pgoff, user_count << PAGE_SHIFT, vma->vm_page_prot); } int dma_direct_supported(struct device *dev, u64 mask) { u64 min_mask = (max_pfn - 1) << PAGE_SHIFT; /* * Because 32-bit DMA masks are so common we expect every architecture * to be able to satisfy them - either by not supporting more physical * memory, or by providing a ZONE_DMA32. If neither is the case, the * architecture needs to use an IOMMU instead of the direct mapping. */ if (mask >= DMA_BIT_MASK(32)) return 1; /* * This check needs to be against the actual bit mask value, so use * phys_to_dma_unencrypted() here so that the SME encryption mask isn't * part of the check. */ if (IS_ENABLED(CONFIG_ZONE_DMA)) min_mask = min_t(u64, min_mask, zone_dma_limit); return mask >= phys_to_dma_unencrypted(dev, min_mask); } static const struct bus_dma_region *dma_find_range(struct device *dev, unsigned long start_pfn) { const struct bus_dma_region *m; for (m = dev->dma_range_map; PFN_DOWN(m->size); m++) { unsigned long cpu_start_pfn = PFN_DOWN(m->cpu_start); if (start_pfn >= cpu_start_pfn && start_pfn - cpu_start_pfn < PFN_DOWN(m->size)) return m; } return NULL; } /* * To check whether all ram resource ranges are covered by dma range map * Returns 0 when further check is needed * Returns 1 if there is some RAM range can't be covered by dma_range_map */ static int check_ram_in_range_map(unsigned long start_pfn, unsigned long nr_pages, void *data) { unsigned long end_pfn = start_pfn + nr_pages; struct device *dev = data; while (start_pfn < end_pfn) { const struct bus_dma_region *bdr; bdr = dma_find_range(dev, start_pfn); if (!bdr) return 1; start_pfn = PFN_DOWN(bdr->cpu_start) + PFN_DOWN(bdr->size); } return 0; } bool dma_direct_all_ram_mapped(struct device *dev) { if (!dev->dma_range_map) return true; return !walk_system_ram_range(0, PFN_DOWN(ULONG_MAX) + 1, dev, check_ram_in_range_map); } size_t dma_direct_max_mapping_size(struct device *dev) { /* If SWIOTLB is active, use its maximum mapping size */ if (is_swiotlb_active(dev) && (dma_addressing_limited(dev) || is_swiotlb_force_bounce(dev))) return swiotlb_max_mapping_size(dev); return SIZE_MAX; } bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr) { return !dev_is_dma_coherent(dev) || swiotlb_find_pool(dev, dma_to_phys(dev, dma_addr)); } /** * dma_direct_set_offset - Assign scalar offset for a single DMA range. * @dev: device pointer; needed to "own" the alloced memory. * @cpu_start: beginning of memory region covered by this offset. * @dma_start: beginning of DMA/PCI region covered by this offset. * @size: size of the region. * * This is for the simple case of a uniform offset which cannot * be discovered by "dma-ranges". * * It returns -ENOMEM if out of memory, -EINVAL if a map * already exists, 0 otherwise. * * Note: any call to this from a driver is a bug. The mapping needs * to be described by the device tree or other firmware interfaces. */ int dma_direct_set_offset(struct device *dev, phys_addr_t cpu_start, dma_addr_t dma_start, u64 size) { struct bus_dma_region *map; u64 offset = (u64)cpu_start - (u64)dma_start; if (dev->dma_range_map) { dev_err(dev, "attempt to add DMA range to existing map\n"); return -EINVAL; } if (!offset) return 0; map = kcalloc(2, sizeof(*map), GFP_KERNEL); if (!map) return -ENOMEM; map[0].cpu_start = cpu_start; map[0].dma_start = dma_start; map[0].size = size; dev->dma_range_map = map; return 0; } |
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2015 2016 2017 | // SPDX-License-Identifier: GPL-2.0-or-later /* * linux/drivers/net/netconsole.c * * Copyright (C) 2001 Ingo Molnar <mingo@redhat.com> * * This file contains the implementation of an IRQ-safe, crash-safe * kernel console implementation that outputs kernel messages to the * network. * * Modification history: * * 2001-09-17 started by Ingo Molnar. * 2003-08-11 2.6 port by Matt Mackall * simplified options * generic card hooks * works non-modular * 2003-09-07 rewritten with netpoll api */ /**************************************************************** * ****************************************************************/ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/mm.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/console.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/netpoll.h> #include <linux/inet.h> #include <linux/configfs.h> #include <linux/etherdevice.h> #include <linux/u64_stats_sync.h> #include <linux/utsname.h> #include <linux/rtnetlink.h> MODULE_AUTHOR("Matt Mackall <mpm@selenic.com>"); MODULE_DESCRIPTION("Console driver for network interfaces"); MODULE_LICENSE("GPL"); #define MAX_PARAM_LENGTH 256 #define MAX_EXTRADATA_ENTRY_LEN 256 #define MAX_EXTRADATA_VALUE_LEN 200 /* The number 3 comes from userdata entry format characters (' ', '=', '\n') */ #define MAX_EXTRADATA_NAME_LEN (MAX_EXTRADATA_ENTRY_LEN - \ MAX_EXTRADATA_VALUE_LEN - 3) #define MAX_EXTRADATA_ITEMS 16 #define MAX_PRINT_CHUNK 1000 static char config[MAX_PARAM_LENGTH]; module_param_string(netconsole, config, MAX_PARAM_LENGTH, 0); MODULE_PARM_DESC(netconsole, " netconsole=[src-port]@[src-ip]/[dev],[tgt-port]@<tgt-ip>/[tgt-macaddr]"); static bool oops_only; module_param(oops_only, bool, 0600); MODULE_PARM_DESC(oops_only, "Only log oops messages"); #define NETCONSOLE_PARAM_TARGET_PREFIX "cmdline" #ifndef MODULE static int __init option_setup(char *opt) { strscpy(config, opt, MAX_PARAM_LENGTH); return 1; } __setup("netconsole=", option_setup); #endif /* MODULE */ /* Linked list of all configured targets */ static LIST_HEAD(target_list); /* target_cleanup_list is used to track targets that need to be cleaned outside * of target_list_lock. It should be cleaned in the same function it is * populated. */ static LIST_HEAD(target_cleanup_list); /* This needs to be a spinlock because write_msg() cannot sleep */ static DEFINE_SPINLOCK(target_list_lock); /* This needs to be a mutex because netpoll_cleanup might sleep */ static DEFINE_MUTEX(target_cleanup_list_lock); /* * Console driver for netconsoles. Register only consoles that have * an associated target of the same type. */ static struct console netconsole_ext, netconsole; struct netconsole_target_stats { u64_stats_t xmit_drop_count; u64_stats_t enomem_count; struct u64_stats_sync syncp; }; enum console_type { CONS_BASIC = BIT(0), CONS_EXTENDED = BIT(1), }; /* Features enabled in sysdata. Contrary to userdata, this data is populated by * the kernel. The fields are designed as bitwise flags, allowing multiple * features to be set in sysdata_fields. */ enum sysdata_feature { /* Populate the CPU that sends the message */ SYSDATA_CPU_NR = BIT(0), /* Populate the task name (as in current->comm) in sysdata */ SYSDATA_TASKNAME = BIT(1), /* Kernel release/version as part of sysdata */ SYSDATA_RELEASE = BIT(2), /* Include a per-target message ID as part of sysdata */ SYSDATA_MSGID = BIT(3), }; /** * struct netconsole_target - Represents a configured netconsole target. * @list: Links this target into the target_list. * @group: Links us into the configfs subsystem hierarchy. * @userdata_group: Links to the userdata configfs hierarchy * @extradata_complete: Cached, formatted string of append * @userdata_length: String length of usedata in extradata_complete. * @sysdata_fields: Sysdata features enabled. * @msgcounter: Message sent counter. * @stats: Packet send stats for the target. Used for debugging. * @enabled: On / off knob to enable / disable target. * Visible from userspace (read-write). * We maintain a strict 1:1 correspondence between this and * whether the corresponding netpoll is active or inactive. * Also, other parameters of a target may be modified at * runtime only when it is disabled (enabled == 0). * @extended: Denotes whether console is extended or not. * @release: Denotes whether kernel release version should be prepended * to the message. Depends on extended console. * @np: The netpoll structure for this target. * Contains the other userspace visible parameters: * dev_name (read-write) * local_port (read-write) * remote_port (read-write) * local_ip (read-write) * remote_ip (read-write) * local_mac (read-only) * remote_mac (read-write) * @buf: The buffer used to send the full msg to the network stack */ struct netconsole_target { struct list_head list; #ifdef CONFIG_NETCONSOLE_DYNAMIC struct config_group group; struct config_group userdata_group; char extradata_complete[MAX_EXTRADATA_ENTRY_LEN * MAX_EXTRADATA_ITEMS]; size_t userdata_length; /* bit-wise with sysdata_feature bits */ u32 sysdata_fields; /* protected by target_list_lock */ u32 msgcounter; #endif struct netconsole_target_stats stats; bool enabled; bool extended; bool release; struct netpoll np; /* protected by target_list_lock */ char buf[MAX_PRINT_CHUNK]; }; #ifdef CONFIG_NETCONSOLE_DYNAMIC static struct configfs_subsystem netconsole_subsys; static DEFINE_MUTEX(dynamic_netconsole_mutex); static int __init dynamic_netconsole_init(void) { config_group_init(&netconsole_subsys.su_group); mutex_init(&netconsole_subsys.su_mutex); return configfs_register_subsystem(&netconsole_subsys); } static void __exit dynamic_netconsole_exit(void) { configfs_unregister_subsystem(&netconsole_subsys); } /* * Targets that were created by parsing the boot/module option string * do not exist in the configfs hierarchy (and have NULL names) and will * never go away, so make these a no-op for them. */ static void netconsole_target_get(struct netconsole_target *nt) { if (config_item_name(&nt->group.cg_item)) config_group_get(&nt->group); } static void netconsole_target_put(struct netconsole_target *nt) { if (config_item_name(&nt->group.cg_item)) config_group_put(&nt->group); } #else /* !CONFIG_NETCONSOLE_DYNAMIC */ static int __init dynamic_netconsole_init(void) { return 0; } static void __exit dynamic_netconsole_exit(void) { } /* * No danger of targets going away from under us when dynamic * reconfigurability is off. */ static void netconsole_target_get(struct netconsole_target *nt) { } static void netconsole_target_put(struct netconsole_target *nt) { } static void populate_configfs_item(struct netconsole_target *nt, int cmdline_count) { } #endif /* CONFIG_NETCONSOLE_DYNAMIC */ /* Allocate and initialize with defaults. * Note that these targets get their config_item fields zeroed-out. */ static struct netconsole_target *alloc_and_init(void) { struct netconsole_target *nt; nt = kzalloc(sizeof(*nt), GFP_KERNEL); if (!nt) return nt; if (IS_ENABLED(CONFIG_NETCONSOLE_EXTENDED_LOG)) nt->extended = true; if (IS_ENABLED(CONFIG_NETCONSOLE_PREPEND_RELEASE)) nt->release = true; nt->np.name = "netconsole"; strscpy(nt->np.dev_name, "eth0", IFNAMSIZ); nt->np.local_port = 6665; nt->np.remote_port = 6666; eth_broadcast_addr(nt->np.remote_mac); return nt; } /* Clean up every target in the cleanup_list and move the clean targets back to * the main target_list. */ static void netconsole_process_cleanups_core(void) { struct netconsole_target *nt, *tmp; unsigned long flags; /* The cleanup needs RTNL locked */ ASSERT_RTNL(); mutex_lock(&target_cleanup_list_lock); list_for_each_entry_safe(nt, tmp, &target_cleanup_list, list) { /* all entries in the cleanup_list needs to be disabled */ WARN_ON_ONCE(nt->enabled); do_netpoll_cleanup(&nt->np); /* moved the cleaned target to target_list. Need to hold both * locks */ spin_lock_irqsave(&target_list_lock, flags); list_move(&nt->list, &target_list); spin_unlock_irqrestore(&target_list_lock, flags); } WARN_ON_ONCE(!list_empty(&target_cleanup_list)); mutex_unlock(&target_cleanup_list_lock); } static void netconsole_print_banner(struct netpoll *np) { np_info(np, "local port %d\n", np->local_port); if (np->ipv6) np_info(np, "local IPv6 address %pI6c\n", &np->local_ip.in6); else np_info(np, "local IPv4 address %pI4\n", &np->local_ip.ip); np_info(np, "interface name '%s'\n", np->dev_name); np_info(np, "local ethernet address '%pM'\n", np->dev_mac); np_info(np, "remote port %d\n", np->remote_port); if (np->ipv6) np_info(np, "remote IPv6 address %pI6c\n", &np->remote_ip.in6); else np_info(np, "remote IPv4 address %pI4\n", &np->remote_ip.ip); np_info(np, "remote ethernet address %pM\n", np->remote_mac); } /* Parse the string and populate the `inet_addr` union. Return 0 if IPv4 is * populated, 1 if IPv6 is populated, and -1 upon failure. */ static int netpoll_parse_ip_addr(const char *str, union inet_addr *addr) { const char *end = NULL; int len; len = strlen(str); if (!len) return -1; if (str[len - 1] == '\n') len -= 1; if (in4_pton(str, len, (void *)addr, -1, &end) > 0 && (!end || *end == 0 || *end == '\n')) return 0; if (IS_ENABLED(CONFIG_IPV6) && in6_pton(str, len, (void *)addr, -1, &end) > 0 && (!end || *end == 0 || *end == '\n')) return 1; return -1; } #ifdef CONFIG_NETCONSOLE_DYNAMIC /* * Our subsystem hierarchy is: * * /sys/kernel/config/netconsole/ * | * <target>/ * | enabled * | release * | dev_name * | local_port * | remote_port * | local_ip * | remote_ip * | local_mac * | remote_mac * | transmit_errors * | userdata/ * | <key>/ * | value * | ... * | * <target>/... */ static struct netconsole_target *to_target(struct config_item *item) { struct config_group *cfg_group; cfg_group = to_config_group(item); if (!cfg_group) return NULL; return container_of(to_config_group(item), struct netconsole_target, group); } /* Do the list cleanup with the rtnl lock hold. rtnl lock is necessary because * netdev might be cleaned-up by calling __netpoll_cleanup(), */ static void netconsole_process_cleanups(void) { /* rtnl lock is called here, because it has precedence over * target_cleanup_list_lock mutex and target_cleanup_list */ rtnl_lock(); netconsole_process_cleanups_core(); rtnl_unlock(); } /* Get rid of possible trailing newline, returning the new length */ static void trim_newline(char *s, size_t maxlen) { size_t len; len = strnlen(s, maxlen); if (s[len - 1] == '\n') s[len - 1] = '\0'; } /* * Attribute operations for netconsole_target. */ static ssize_t enabled_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%d\n", to_target(item)->enabled); } static ssize_t extended_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%d\n", to_target(item)->extended); } static ssize_t release_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%d\n", to_target(item)->release); } static ssize_t dev_name_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%s\n", to_target(item)->np.dev_name); } static ssize_t local_port_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%d\n", to_target(item)->np.local_port); } static ssize_t remote_port_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%d\n", to_target(item)->np.remote_port); } static ssize_t local_ip_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item); if (nt->np.ipv6) return sysfs_emit(buf, "%pI6c\n", &nt->np.local_ip.in6); else return sysfs_emit(buf, "%pI4\n", &nt->np.local_ip); } static ssize_t remote_ip_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item); if (nt->np.ipv6) return sysfs_emit(buf, "%pI6c\n", &nt->np.remote_ip.in6); else return sysfs_emit(buf, "%pI4\n", &nt->np.remote_ip); } static ssize_t local_mac_show(struct config_item *item, char *buf) { struct net_device *dev = to_target(item)->np.dev; static const u8 bcast[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; return sysfs_emit(buf, "%pM\n", dev ? dev->dev_addr : bcast); } static ssize_t remote_mac_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%pM\n", to_target(item)->np.remote_mac); } static ssize_t transmit_errors_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item); u64 xmit_drop_count, enomem_count; unsigned int start; do { start = u64_stats_fetch_begin(&nt->stats.syncp); xmit_drop_count = u64_stats_read(&nt->stats.xmit_drop_count); enomem_count = u64_stats_read(&nt->stats.enomem_count); } while (u64_stats_fetch_retry(&nt->stats.syncp, start)); return sysfs_emit(buf, "%llu\n", xmit_drop_count + enomem_count); } /* configfs helper to display if cpu_nr sysdata feature is enabled */ static ssize_t sysdata_cpu_nr_enabled_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item->ci_parent); bool cpu_nr_enabled; mutex_lock(&dynamic_netconsole_mutex); cpu_nr_enabled = !!(nt->sysdata_fields & SYSDATA_CPU_NR); mutex_unlock(&dynamic_netconsole_mutex); return sysfs_emit(buf, "%d\n", cpu_nr_enabled); } /* configfs helper to display if taskname sysdata feature is enabled */ static ssize_t sysdata_taskname_enabled_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item->ci_parent); bool taskname_enabled; mutex_lock(&dynamic_netconsole_mutex); taskname_enabled = !!(nt->sysdata_fields & SYSDATA_TASKNAME); mutex_unlock(&dynamic_netconsole_mutex); return sysfs_emit(buf, "%d\n", taskname_enabled); } static ssize_t sysdata_release_enabled_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item->ci_parent); bool release_enabled; mutex_lock(&dynamic_netconsole_mutex); release_enabled = !!(nt->sysdata_fields & SYSDATA_TASKNAME); mutex_unlock(&dynamic_netconsole_mutex); return sysfs_emit(buf, "%d\n", release_enabled); } /* Iterate in the list of target, and make sure we don't have any console * register without targets of the same type */ static void unregister_netcons_consoles(void) { struct netconsole_target *nt; u32 console_type_needed = 0; unsigned long flags; spin_lock_irqsave(&target_list_lock, flags); list_for_each_entry(nt, &target_list, list) { if (nt->extended) console_type_needed |= CONS_EXTENDED; else console_type_needed |= CONS_BASIC; } spin_unlock_irqrestore(&target_list_lock, flags); if (!(console_type_needed & CONS_EXTENDED) && console_is_registered(&netconsole_ext)) unregister_console(&netconsole_ext); if (!(console_type_needed & CONS_BASIC) && console_is_registered(&netconsole)) unregister_console(&netconsole); } static ssize_t sysdata_msgid_enabled_show(struct config_item *item, char *buf) { struct netconsole_target *nt = to_target(item->ci_parent); bool msgid_enabled; mutex_lock(&dynamic_netconsole_mutex); msgid_enabled = !!(nt->sysdata_fields & SYSDATA_MSGID); mutex_unlock(&dynamic_netconsole_mutex); return sysfs_emit(buf, "%d\n", msgid_enabled); } /* * This one is special -- targets created through the configfs interface * are not enabled (and the corresponding netpoll activated) by default. * The user is expected to set the desired parameters first (which * would enable him to dynamically add new netpoll targets for new * network interfaces as and when they come up). */ static ssize_t enabled_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); unsigned long flags; bool enabled; ssize_t ret; mutex_lock(&dynamic_netconsole_mutex); ret = kstrtobool(buf, &enabled); if (ret) goto out_unlock; ret = -EINVAL; if (enabled == nt->enabled) { pr_info("network logging has already %s\n", nt->enabled ? "started" : "stopped"); goto out_unlock; } if (enabled) { /* true */ if (nt->release && !nt->extended) { pr_err("Not enabling netconsole. Release feature requires extended log message"); goto out_unlock; } if (nt->extended && !console_is_registered(&netconsole_ext)) { netconsole_ext.flags |= CON_ENABLED; register_console(&netconsole_ext); } /* User might be enabling the basic format target for the very * first time, make sure the console is registered. */ if (!nt->extended && !console_is_registered(&netconsole)) { netconsole.flags |= CON_ENABLED; register_console(&netconsole); } /* * Skip netconsole_parser_cmdline() -- all the attributes are * already configured via configfs. Just print them out. */ netconsole_print_banner(&nt->np); ret = netpoll_setup(&nt->np); if (ret) goto out_unlock; nt->enabled = true; pr_info("network logging started\n"); } else { /* false */ /* We need to disable the netconsole before cleaning it up * otherwise we might end up in write_msg() with * nt->np.dev == NULL and nt->enabled == true */ mutex_lock(&target_cleanup_list_lock); spin_lock_irqsave(&target_list_lock, flags); nt->enabled = false; /* Remove the target from the list, while holding * target_list_lock */ list_move(&nt->list, &target_cleanup_list); spin_unlock_irqrestore(&target_list_lock, flags); mutex_unlock(&target_cleanup_list_lock); /* Unregister consoles, whose the last target of that type got * disabled. */ unregister_netcons_consoles(); } ret = strnlen(buf, count); /* Deferred cleanup */ netconsole_process_cleanups(); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t release_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); bool release; ssize_t ret; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); ret = -EINVAL; goto out_unlock; } ret = kstrtobool(buf, &release); if (ret) goto out_unlock; nt->release = release; ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t extended_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); bool extended; ssize_t ret; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); ret = -EINVAL; goto out_unlock; } ret = kstrtobool(buf, &extended); if (ret) goto out_unlock; nt->extended = extended; ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t dev_name_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); mutex_unlock(&dynamic_netconsole_mutex); return -EINVAL; } strscpy(nt->np.dev_name, buf, IFNAMSIZ); trim_newline(nt->np.dev_name, IFNAMSIZ); mutex_unlock(&dynamic_netconsole_mutex); return strnlen(buf, count); } static ssize_t local_port_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); ssize_t ret = -EINVAL; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); goto out_unlock; } ret = kstrtou16(buf, 10, &nt->np.local_port); if (ret < 0) goto out_unlock; ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t remote_port_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); ssize_t ret = -EINVAL; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); goto out_unlock; } ret = kstrtou16(buf, 10, &nt->np.remote_port); if (ret < 0) goto out_unlock; ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t local_ip_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); ssize_t ret = -EINVAL; int ipv6; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); goto out_unlock; } ipv6 = netpoll_parse_ip_addr(buf, &nt->np.local_ip); if (ipv6 == -1) goto out_unlock; nt->np.ipv6 = !!ipv6; ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t remote_ip_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); ssize_t ret = -EINVAL; int ipv6; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); goto out_unlock; } ipv6 = netpoll_parse_ip_addr(buf, &nt->np.remote_ip); if (ipv6 == -1) goto out_unlock; nt->np.ipv6 = !!ipv6; ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } /* Count number of entries we have in extradata. * This is important because the extradata_complete only supports * MAX_EXTRADATA_ITEMS entries. Before enabling any new {user,sys}data * feature, number of entries needs to checked for available space. */ static size_t count_extradata_entries(struct netconsole_target *nt) { size_t entries; /* Userdata entries */ entries = list_count_nodes(&nt->userdata_group.cg_children); /* Plus sysdata entries */ if (nt->sysdata_fields & SYSDATA_CPU_NR) entries += 1; if (nt->sysdata_fields & SYSDATA_TASKNAME) entries += 1; if (nt->sysdata_fields & SYSDATA_RELEASE) entries += 1; if (nt->sysdata_fields & SYSDATA_MSGID) entries += 1; return entries; } static ssize_t remote_mac_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item); u8 remote_mac[ETH_ALEN]; ssize_t ret = -EINVAL; mutex_lock(&dynamic_netconsole_mutex); if (nt->enabled) { pr_err("target (%s) is enabled, disable to update parameters\n", config_item_name(&nt->group.cg_item)); goto out_unlock; } if (!mac_pton(buf, remote_mac)) goto out_unlock; if (buf[MAC_ADDR_STR_LEN] && buf[MAC_ADDR_STR_LEN] != '\n') goto out_unlock; memcpy(nt->np.remote_mac, remote_mac, ETH_ALEN); ret = strnlen(buf, count); out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } struct userdatum { struct config_item item; char value[MAX_EXTRADATA_VALUE_LEN]; }; static struct userdatum *to_userdatum(struct config_item *item) { return container_of(item, struct userdatum, item); } struct userdata { struct config_group group; }; static struct userdata *to_userdata(struct config_item *item) { return container_of(to_config_group(item), struct userdata, group); } static struct netconsole_target *userdata_to_target(struct userdata *ud) { struct config_group *netconsole_group; netconsole_group = to_config_group(ud->group.cg_item.ci_parent); return to_target(&netconsole_group->cg_item); } static ssize_t userdatum_value_show(struct config_item *item, char *buf) { return sysfs_emit(buf, "%s\n", &(to_userdatum(item)->value[0])); } static void update_userdata(struct netconsole_target *nt) { int complete_idx = 0, child_count = 0; struct list_head *entry; /* Clear the current string in case the last userdatum was deleted */ nt->userdata_length = 0; nt->extradata_complete[0] = 0; list_for_each(entry, &nt->userdata_group.cg_children) { struct userdatum *udm_item; struct config_item *item; if (WARN_ON_ONCE(child_count >= MAX_EXTRADATA_ITEMS)) break; child_count++; item = container_of(entry, struct config_item, ci_entry); udm_item = to_userdatum(item); /* Skip userdata with no value set */ if (strnlen(udm_item->value, MAX_EXTRADATA_VALUE_LEN) == 0) continue; /* This doesn't overflow extradata_complete since it will write * one entry length (1/MAX_EXTRADATA_ITEMS long), entry count is * checked to not exceed MAX items with child_count above */ complete_idx += scnprintf(&nt->extradata_complete[complete_idx], MAX_EXTRADATA_ENTRY_LEN, " %s=%s\n", item->ci_name, udm_item->value); } nt->userdata_length = strnlen(nt->extradata_complete, sizeof(nt->extradata_complete)); } static ssize_t userdatum_value_store(struct config_item *item, const char *buf, size_t count) { struct userdatum *udm = to_userdatum(item); struct netconsole_target *nt; struct userdata *ud; ssize_t ret; if (count > MAX_EXTRADATA_VALUE_LEN) return -EMSGSIZE; mutex_lock(&dynamic_netconsole_mutex); ret = strscpy(udm->value, buf, sizeof(udm->value)); if (ret < 0) goto out_unlock; trim_newline(udm->value, sizeof(udm->value)); ud = to_userdata(item->ci_parent); nt = userdata_to_target(ud); update_userdata(nt); ret = count; out_unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } /* disable_sysdata_feature - Disable sysdata feature and clean sysdata * @nt: target that is disabling the feature * @feature: feature being disabled */ static void disable_sysdata_feature(struct netconsole_target *nt, enum sysdata_feature feature) { nt->sysdata_fields &= ~feature; nt->extradata_complete[nt->userdata_length] = 0; } static ssize_t sysdata_msgid_enabled_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item->ci_parent); bool msgid_enabled, curr; ssize_t ret; ret = kstrtobool(buf, &msgid_enabled); if (ret) return ret; mutex_lock(&dynamic_netconsole_mutex); curr = !!(nt->sysdata_fields & SYSDATA_MSGID); if (msgid_enabled == curr) goto unlock_ok; if (msgid_enabled && count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS) { ret = -ENOSPC; goto unlock; } if (msgid_enabled) nt->sysdata_fields |= SYSDATA_MSGID; else disable_sysdata_feature(nt, SYSDATA_MSGID); unlock_ok: ret = strnlen(buf, count); unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t sysdata_release_enabled_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item->ci_parent); bool release_enabled, curr; ssize_t ret; ret = kstrtobool(buf, &release_enabled); if (ret) return ret; mutex_lock(&dynamic_netconsole_mutex); curr = !!(nt->sysdata_fields & SYSDATA_RELEASE); if (release_enabled == curr) goto unlock_ok; if (release_enabled && count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS) { ret = -ENOSPC; goto unlock; } if (release_enabled) nt->sysdata_fields |= SYSDATA_RELEASE; else disable_sysdata_feature(nt, SYSDATA_RELEASE); unlock_ok: ret = strnlen(buf, count); unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } static ssize_t sysdata_taskname_enabled_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item->ci_parent); bool taskname_enabled, curr; ssize_t ret; ret = kstrtobool(buf, &taskname_enabled); if (ret) return ret; mutex_lock(&dynamic_netconsole_mutex); curr = !!(nt->sysdata_fields & SYSDATA_TASKNAME); if (taskname_enabled == curr) goto unlock_ok; if (taskname_enabled && count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS) { ret = -ENOSPC; goto unlock; } if (taskname_enabled) nt->sysdata_fields |= SYSDATA_TASKNAME; else disable_sysdata_feature(nt, SYSDATA_TASKNAME); unlock_ok: ret = strnlen(buf, count); unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } /* configfs helper to sysdata cpu_nr feature */ static ssize_t sysdata_cpu_nr_enabled_store(struct config_item *item, const char *buf, size_t count) { struct netconsole_target *nt = to_target(item->ci_parent); bool cpu_nr_enabled, curr; ssize_t ret; ret = kstrtobool(buf, &cpu_nr_enabled); if (ret) return ret; mutex_lock(&dynamic_netconsole_mutex); curr = !!(nt->sysdata_fields & SYSDATA_CPU_NR); if (cpu_nr_enabled == curr) /* no change requested */ goto unlock_ok; if (cpu_nr_enabled && count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS) { /* user wants the new feature, but there is no space in the * buffer. */ ret = -ENOSPC; goto unlock; } if (cpu_nr_enabled) nt->sysdata_fields |= SYSDATA_CPU_NR; else /* This is special because extradata_complete might have * remaining data from previous sysdata, and it needs to be * cleaned. */ disable_sysdata_feature(nt, SYSDATA_CPU_NR); unlock_ok: ret = strnlen(buf, count); unlock: mutex_unlock(&dynamic_netconsole_mutex); return ret; } CONFIGFS_ATTR(userdatum_, value); CONFIGFS_ATTR(sysdata_, cpu_nr_enabled); CONFIGFS_ATTR(sysdata_, taskname_enabled); CONFIGFS_ATTR(sysdata_, release_enabled); CONFIGFS_ATTR(sysdata_, msgid_enabled); static struct configfs_attribute *userdatum_attrs[] = { &userdatum_attr_value, NULL, }; static void userdatum_release(struct config_item *item) { kfree(to_userdatum(item)); } static struct configfs_item_operations userdatum_ops = { .release = userdatum_release, }; static const struct config_item_type userdatum_type = { .ct_item_ops = &userdatum_ops, .ct_attrs = userdatum_attrs, .ct_owner = THIS_MODULE, }; static struct config_item *userdatum_make_item(struct config_group *group, const char *name) { struct netconsole_target *nt; struct userdatum *udm; struct userdata *ud; if (strlen(name) > MAX_EXTRADATA_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); ud = to_userdata(&group->cg_item); nt = userdata_to_target(ud); if (count_extradata_entries(nt) >= MAX_EXTRADATA_ITEMS) return ERR_PTR(-ENOSPC); udm = kzalloc(sizeof(*udm), GFP_KERNEL); if (!udm) return ERR_PTR(-ENOMEM); config_item_init_type_name(&udm->item, name, &userdatum_type); return &udm->item; } static void userdatum_drop(struct config_group *group, struct config_item *item) { struct netconsole_target *nt; struct userdata *ud; ud = to_userdata(&group->cg_item); nt = userdata_to_target(ud); mutex_lock(&dynamic_netconsole_mutex); update_userdata(nt); config_item_put(item); mutex_unlock(&dynamic_netconsole_mutex); } static struct configfs_attribute *userdata_attrs[] = { &sysdata_attr_cpu_nr_enabled, &sysdata_attr_taskname_enabled, &sysdata_attr_release_enabled, &sysdata_attr_msgid_enabled, NULL, }; static struct configfs_group_operations userdata_ops = { .make_item = userdatum_make_item, .drop_item = userdatum_drop, }; static const struct config_item_type userdata_type = { .ct_item_ops = &userdatum_ops, .ct_group_ops = &userdata_ops, .ct_attrs = userdata_attrs, .ct_owner = THIS_MODULE, }; CONFIGFS_ATTR(, enabled); CONFIGFS_ATTR(, extended); CONFIGFS_ATTR(, dev_name); CONFIGFS_ATTR(, local_port); CONFIGFS_ATTR(, remote_port); CONFIGFS_ATTR(, local_ip); CONFIGFS_ATTR(, remote_ip); CONFIGFS_ATTR_RO(, local_mac); CONFIGFS_ATTR(, remote_mac); CONFIGFS_ATTR(, release); CONFIGFS_ATTR_RO(, transmit_errors); static struct configfs_attribute *netconsole_target_attrs[] = { &attr_enabled, &attr_extended, &attr_release, &attr_dev_name, &attr_local_port, &attr_remote_port, &attr_local_ip, &attr_remote_ip, &attr_local_mac, &attr_remote_mac, &attr_transmit_errors, NULL, }; /* * Item operations and type for netconsole_target. */ static void netconsole_target_release(struct config_item *item) { kfree(to_target(item)); } static struct configfs_item_operations netconsole_target_item_ops = { .release = netconsole_target_release, }; static const struct config_item_type netconsole_target_type = { .ct_attrs = netconsole_target_attrs, .ct_item_ops = &netconsole_target_item_ops, .ct_owner = THIS_MODULE, }; static void init_target_config_group(struct netconsole_target *nt, const char *name) { config_group_init_type_name(&nt->group, name, &netconsole_target_type); config_group_init_type_name(&nt->userdata_group, "userdata", &userdata_type); configfs_add_default_group(&nt->userdata_group, &nt->group); } static struct netconsole_target *find_cmdline_target(const char *name) { struct netconsole_target *nt, *ret = NULL; unsigned long flags; spin_lock_irqsave(&target_list_lock, flags); list_for_each_entry(nt, &target_list, list) { if (!strcmp(nt->group.cg_item.ci_name, name)) { ret = nt; break; } } spin_unlock_irqrestore(&target_list_lock, flags); return ret; } /* * Group operations and type for netconsole_subsys. */ static struct config_group *make_netconsole_target(struct config_group *group, const char *name) { struct netconsole_target *nt; unsigned long flags; /* Checking if a target by this name was created at boot time. If so, * attach a configfs entry to that target. This enables dynamic * control. */ if (!strncmp(name, NETCONSOLE_PARAM_TARGET_PREFIX, strlen(NETCONSOLE_PARAM_TARGET_PREFIX))) { nt = find_cmdline_target(name); if (nt) { init_target_config_group(nt, name); return &nt->group; } } nt = alloc_and_init(); if (!nt) return ERR_PTR(-ENOMEM); /* Initialize the config_group member */ init_target_config_group(nt, name); /* Adding, but it is disabled */ spin_lock_irqsave(&target_list_lock, flags); list_add(&nt->list, &target_list); spin_unlock_irqrestore(&target_list_lock, flags); return &nt->group; } static void drop_netconsole_target(struct config_group *group, struct config_item *item) { unsigned long flags; struct netconsole_target *nt = to_target(item); spin_lock_irqsave(&target_list_lock, flags); list_del(&nt->list); spin_unlock_irqrestore(&target_list_lock, flags); /* * The target may have never been enabled, or was manually disabled * before being removed so netpoll may have already been cleaned up. */ if (nt->enabled) netpoll_cleanup(&nt->np); config_item_put(&nt->group.cg_item); } static struct configfs_group_operations netconsole_subsys_group_ops = { .make_group = make_netconsole_target, .drop_item = drop_netconsole_target, }; static const struct config_item_type netconsole_subsys_type = { .ct_group_ops = &netconsole_subsys_group_ops, .ct_owner = THIS_MODULE, }; /* The netconsole configfs subsystem */ static struct configfs_subsystem netconsole_subsys = { .su_group = { .cg_item = { .ci_namebuf = "netconsole", .ci_type = &netconsole_subsys_type, }, }, }; static void populate_configfs_item(struct netconsole_target *nt, int cmdline_count) { char target_name[16]; snprintf(target_name, sizeof(target_name), "%s%d", NETCONSOLE_PARAM_TARGET_PREFIX, cmdline_count); init_target_config_group(nt, target_name); } static int sysdata_append_cpu_nr(struct netconsole_target *nt, int offset) { /* Append cpu=%d at extradata_complete after userdata str */ return scnprintf(&nt->extradata_complete[offset], MAX_EXTRADATA_ENTRY_LEN, " cpu=%u\n", raw_smp_processor_id()); } static int sysdata_append_taskname(struct netconsole_target *nt, int offset) { return scnprintf(&nt->extradata_complete[offset], MAX_EXTRADATA_ENTRY_LEN, " taskname=%s\n", current->comm); } static int sysdata_append_release(struct netconsole_target *nt, int offset) { return scnprintf(&nt->extradata_complete[offset], MAX_EXTRADATA_ENTRY_LEN, " release=%s\n", init_utsname()->release); } static int sysdata_append_msgid(struct netconsole_target *nt, int offset) { wrapping_assign_add(nt->msgcounter, 1); return scnprintf(&nt->extradata_complete[offset], MAX_EXTRADATA_ENTRY_LEN, " msgid=%u\n", nt->msgcounter); } /* * prepare_extradata - append sysdata at extradata_complete in runtime * @nt: target to send message to */ static int prepare_extradata(struct netconsole_target *nt) { int extradata_len; /* userdata was appended when configfs write helper was called * by update_userdata(). */ extradata_len = nt->userdata_length; if (!nt->sysdata_fields) goto out; if (nt->sysdata_fields & SYSDATA_CPU_NR) extradata_len += sysdata_append_cpu_nr(nt, extradata_len); if (nt->sysdata_fields & SYSDATA_TASKNAME) extradata_len += sysdata_append_taskname(nt, extradata_len); if (nt->sysdata_fields & SYSDATA_RELEASE) extradata_len += sysdata_append_release(nt, extradata_len); if (nt->sysdata_fields & SYSDATA_MSGID) extradata_len += sysdata_append_msgid(nt, extradata_len); WARN_ON_ONCE(extradata_len > MAX_EXTRADATA_ENTRY_LEN * MAX_EXTRADATA_ITEMS); out: return extradata_len; } #else /* CONFIG_NETCONSOLE_DYNAMIC not set */ static int prepare_extradata(struct netconsole_target *nt) { return 0; } #endif /* CONFIG_NETCONSOLE_DYNAMIC */ /* Handle network interface device notifications */ static int netconsole_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) { unsigned long flags; struct netconsole_target *nt, *tmp; struct net_device *dev = netdev_notifier_info_to_dev(ptr); bool stopped = false; if (!(event == NETDEV_CHANGENAME || event == NETDEV_UNREGISTER || event == NETDEV_RELEASE || event == NETDEV_JOIN)) goto done; mutex_lock(&target_cleanup_list_lock); spin_lock_irqsave(&target_list_lock, flags); list_for_each_entry_safe(nt, tmp, &target_list, list) { netconsole_target_get(nt); if (nt->np.dev == dev) { switch (event) { case NETDEV_CHANGENAME: strscpy(nt->np.dev_name, dev->name, IFNAMSIZ); break; case NETDEV_RELEASE: case NETDEV_JOIN: case NETDEV_UNREGISTER: nt->enabled = false; list_move(&nt->list, &target_cleanup_list); stopped = true; } } netconsole_target_put(nt); } spin_unlock_irqrestore(&target_list_lock, flags); mutex_unlock(&target_cleanup_list_lock); if (stopped) { const char *msg = "had an event"; switch (event) { case NETDEV_UNREGISTER: msg = "unregistered"; break; case NETDEV_RELEASE: msg = "released slaves"; break; case NETDEV_JOIN: msg = "is joining a master device"; break; } pr_info("network logging stopped on interface %s as it %s\n", dev->name, msg); } /* Process target_cleanup_list entries. By the end, target_cleanup_list * should be empty */ netconsole_process_cleanups_core(); done: return NOTIFY_DONE; } static struct notifier_block netconsole_netdev_notifier = { .notifier_call = netconsole_netdev_event, }; /** * send_udp - Wrapper for netpoll_send_udp that counts errors * @nt: target to send message to * @msg: message to send * @len: length of message * * Calls netpoll_send_udp and classifies the return value. If an error * occurred it increments statistics in nt->stats accordingly. * Only calls netpoll_send_udp if CONFIG_NETCONSOLE_DYNAMIC is disabled. */ static void send_udp(struct netconsole_target *nt, const char *msg, int len) { int result = netpoll_send_udp(&nt->np, msg, len); if (IS_ENABLED(CONFIG_NETCONSOLE_DYNAMIC)) { if (result == NET_XMIT_DROP) { u64_stats_update_begin(&nt->stats.syncp); u64_stats_inc(&nt->stats.xmit_drop_count); u64_stats_update_end(&nt->stats.syncp); } else if (result == -ENOMEM) { u64_stats_update_begin(&nt->stats.syncp); u64_stats_inc(&nt->stats.enomem_count); u64_stats_update_end(&nt->stats.syncp); } } } static void send_msg_no_fragmentation(struct netconsole_target *nt, const char *msg, int msg_len, int release_len) { const char *extradata = NULL; const char *release; #ifdef CONFIG_NETCONSOLE_DYNAMIC extradata = nt->extradata_complete; #endif if (release_len) { release = init_utsname()->release; scnprintf(nt->buf, MAX_PRINT_CHUNK, "%s,%s", release, msg); msg_len += release_len; } else { memcpy(nt->buf, msg, msg_len); } if (extradata) msg_len += scnprintf(&nt->buf[msg_len], MAX_PRINT_CHUNK - msg_len, "%s", extradata); send_udp(nt, nt->buf, msg_len); } static void append_release(char *buf) { const char *release; release = init_utsname()->release; scnprintf(buf, MAX_PRINT_CHUNK, "%s,", release); } static void send_fragmented_body(struct netconsole_target *nt, const char *msgbody, int header_len, int msgbody_len, int extradata_len) { int sent_extradata, preceding_bytes; const char *extradata = NULL; int body_len, offset = 0; #ifdef CONFIG_NETCONSOLE_DYNAMIC extradata = nt->extradata_complete; #endif /* body_len represents the number of bytes that will be sent. This is * bigger than MAX_PRINT_CHUNK, thus, it will be split in multiple * packets */ body_len = msgbody_len + extradata_len; /* In each iteration of the while loop below, we send a packet * containing the header and a portion of the body. The body is * composed of two parts: msgbody and extradata. We keep track of how * many bytes have been sent so far using the offset variable, which * ranges from 0 to the total length of the body. */ while (offset < body_len) { int this_header = header_len; bool msgbody_written = false; int this_offset = 0; int this_chunk = 0; this_header += scnprintf(nt->buf + this_header, MAX_PRINT_CHUNK - this_header, ",ncfrag=%d/%d;", offset, body_len); /* Not all msgbody data has been written yet */ if (offset < msgbody_len) { this_chunk = min(msgbody_len - offset, MAX_PRINT_CHUNK - this_header); if (WARN_ON_ONCE(this_chunk <= 0)) return; memcpy(nt->buf + this_header, msgbody + offset, this_chunk); this_offset += this_chunk; } /* msgbody was finally written, either in the previous * messages and/or in the current buf. Time to write * the extradata. */ msgbody_written |= offset + this_offset >= msgbody_len; /* Msg body is fully written and there is pending extradata to * write, append extradata in this chunk */ if (msgbody_written && offset + this_offset < body_len) { /* Track how much user data was already sent. First * time here, sent_userdata is zero */ sent_extradata = (offset + this_offset) - msgbody_len; /* offset of bytes used in current buf */ preceding_bytes = this_chunk + this_header; if (WARN_ON_ONCE(sent_extradata < 0)) return; this_chunk = min(extradata_len - sent_extradata, MAX_PRINT_CHUNK - preceding_bytes); if (WARN_ON_ONCE(this_chunk < 0)) /* this_chunk could be zero if all the previous * message used all the buffer. This is not a * problem, extradata will be sent in the next * iteration */ return; memcpy(nt->buf + this_header + this_offset, extradata + sent_extradata, this_chunk); this_offset += this_chunk; } send_udp(nt, nt->buf, this_header + this_offset); offset += this_offset; } } static void send_msg_fragmented(struct netconsole_target *nt, const char *msg, int msg_len, int release_len, int extradata_len) { int header_len, msgbody_len; const char *msgbody; /* need to insert extra header fields, detect header and msgbody */ msgbody = memchr(msg, ';', msg_len); if (WARN_ON_ONCE(!msgbody)) return; header_len = msgbody - msg; msgbody_len = msg_len - header_len - 1; msgbody++; /* * Transfer multiple chunks with the following extra header. * "ncfrag=<byte-offset>/<total-bytes>" */ if (release_len) append_release(nt->buf); /* Copy the header into the buffer */ memcpy(nt->buf + release_len, msg, header_len); header_len += release_len; /* for now on, the header will be persisted, and the msgbody * will be replaced */ send_fragmented_body(nt, msgbody, header_len, msgbody_len, extradata_len); } /** * send_ext_msg_udp - send extended log message to target * @nt: target to send message to * @msg: extended log message to send * @msg_len: length of message * * Transfer extended log @msg to @nt. If @msg is longer than * MAX_PRINT_CHUNK, it'll be split and transmitted in multiple chunks with * ncfrag header field added to identify them. */ static void send_ext_msg_udp(struct netconsole_target *nt, const char *msg, int msg_len) { int release_len = 0; int extradata_len; extradata_len = prepare_extradata(nt); if (nt->release) release_len = strlen(init_utsname()->release) + 1; if (msg_len + release_len + extradata_len <= MAX_PRINT_CHUNK) return send_msg_no_fragmentation(nt, msg, msg_len, release_len); return send_msg_fragmented(nt, msg, msg_len, release_len, extradata_len); } static void write_ext_msg(struct console *con, const char *msg, unsigned int len) { struct netconsole_target *nt; unsigned long flags; if ((oops_only && !oops_in_progress) || list_empty(&target_list)) return; spin_lock_irqsave(&target_list_lock, flags); list_for_each_entry(nt, &target_list, list) if (nt->extended && nt->enabled && netif_running(nt->np.dev)) send_ext_msg_udp(nt, msg, len); spin_unlock_irqrestore(&target_list_lock, flags); } static void write_msg(struct console *con, const char *msg, unsigned int len) { int frag, left; unsigned long flags; struct netconsole_target *nt; const char *tmp; if (oops_only && !oops_in_progress) return; /* Avoid taking lock and disabling interrupts unnecessarily */ if (list_empty(&target_list)) return; spin_lock_irqsave(&target_list_lock, flags); list_for_each_entry(nt, &target_list, list) { if (!nt->extended && nt->enabled && netif_running(nt->np.dev)) { /* * We nest this inside the for-each-target loop above * so that we're able to get as much logging out to * at least one target if we die inside here, instead * of unnecessarily keeping all targets in lock-step. */ tmp = msg; for (left = len; left;) { frag = min(left, MAX_PRINT_CHUNK); send_udp(nt, tmp, frag); tmp += frag; left -= frag; } } } spin_unlock_irqrestore(&target_list_lock, flags); } static int netconsole_parser_cmdline(struct netpoll *np, char *opt) { bool ipversion_set = false; char *cur = opt; char *delim; int ipv6; if (*cur != '@') { delim = strchr(cur, '@'); if (!delim) goto parse_failed; *delim = 0; if (kstrtou16(cur, 10, &np->local_port)) goto parse_failed; cur = delim; } cur++; if (*cur != '/') { ipversion_set = true; delim = strchr(cur, '/'); if (!delim) goto parse_failed; *delim = 0; ipv6 = netpoll_parse_ip_addr(cur, &np->local_ip); if (ipv6 < 0) goto parse_failed; else np->ipv6 = (bool)ipv6; cur = delim; } cur++; if (*cur != ',') { /* parse out dev_name or dev_mac */ delim = strchr(cur, ','); if (!delim) goto parse_failed; *delim = 0; np->dev_name[0] = '\0'; eth_broadcast_addr(np->dev_mac); if (!strchr(cur, ':')) strscpy(np->dev_name, cur, sizeof(np->dev_name)); else if (!mac_pton(cur, np->dev_mac)) goto parse_failed; cur = delim; } cur++; if (*cur != '@') { /* dst port */ delim = strchr(cur, '@'); if (!delim) goto parse_failed; *delim = 0; if (*cur == ' ' || *cur == '\t') np_info(np, "warning: whitespace is not allowed\n"); if (kstrtou16(cur, 10, &np->remote_port)) goto parse_failed; cur = delim; } cur++; /* dst ip */ delim = strchr(cur, '/'); if (!delim) goto parse_failed; *delim = 0; ipv6 = netpoll_parse_ip_addr(cur, &np->remote_ip); if (ipv6 < 0) goto parse_failed; else if (ipversion_set && np->ipv6 != (bool)ipv6) goto parse_failed; else np->ipv6 = (bool)ipv6; cur = delim + 1; if (*cur != 0) { /* MAC address */ if (!mac_pton(cur, np->remote_mac)) goto parse_failed; } netconsole_print_banner(np); return 0; parse_failed: np_info(np, "couldn't parse config at '%s'!\n", cur); return -1; } /* Allocate new target (from boot/module param) and setup netpoll for it */ static struct netconsole_target *alloc_param_target(char *target_config, int cmdline_count) { struct netconsole_target *nt; int err; nt = alloc_and_init(); if (!nt) { err = -ENOMEM; goto fail; } if (*target_config == '+') { nt->extended = true; target_config++; } if (*target_config == 'r') { if (!nt->extended) { pr_err("Netconsole configuration error. Release feature requires extended log message"); err = -EINVAL; goto fail; } nt->release = true; target_config++; } /* Parse parameters and setup netpoll */ err = netconsole_parser_cmdline(&nt->np, target_config); if (err) goto fail; err = netpoll_setup(&nt->np); if (err) { pr_err("Not enabling netconsole for %s%d. Netpoll setup failed\n", NETCONSOLE_PARAM_TARGET_PREFIX, cmdline_count); if (!IS_ENABLED(CONFIG_NETCONSOLE_DYNAMIC)) /* only fail if dynamic reconfiguration is set, * otherwise, keep the target in the list, but disabled. */ goto fail; } else { nt->enabled = true; } populate_configfs_item(nt, cmdline_count); return nt; fail: kfree(nt); return ERR_PTR(err); } /* Cleanup netpoll for given target (from boot/module param) and free it */ static void free_param_target(struct netconsole_target *nt) { netpoll_cleanup(&nt->np); kfree(nt); } static struct console netconsole_ext = { .name = "netcon_ext", .flags = CON_ENABLED | CON_EXTENDED, .write = write_ext_msg, }; static struct console netconsole = { .name = "netcon", .flags = CON_ENABLED, .write = write_msg, }; static int __init init_netconsole(void) { int err; struct netconsole_target *nt, *tmp; u32 console_type_needed = 0; unsigned int count = 0; unsigned long flags; char *target_config; char *input = config; if (strnlen(input, MAX_PARAM_LENGTH)) { while ((target_config = strsep(&input, ";"))) { nt = alloc_param_target(target_config, count); if (IS_ERR(nt)) { if (IS_ENABLED(CONFIG_NETCONSOLE_DYNAMIC)) continue; err = PTR_ERR(nt); goto fail; } /* Dump existing printks when we register */ if (nt->extended) { console_type_needed |= CONS_EXTENDED; netconsole_ext.flags |= CON_PRINTBUFFER; } else { console_type_needed |= CONS_BASIC; netconsole.flags |= CON_PRINTBUFFER; } spin_lock_irqsave(&target_list_lock, flags); list_add(&nt->list, &target_list); spin_unlock_irqrestore(&target_list_lock, flags); count++; } } err = register_netdevice_notifier(&netconsole_netdev_notifier); if (err) goto fail; err = dynamic_netconsole_init(); if (err) goto undonotifier; if (console_type_needed & CONS_EXTENDED) register_console(&netconsole_ext); if (console_type_needed & CONS_BASIC) register_console(&netconsole); pr_info("network logging started\n"); return err; undonotifier: unregister_netdevice_notifier(&netconsole_netdev_notifier); fail: pr_err("cleaning up\n"); /* * Remove all targets and destroy them (only targets created * from the boot/module option exist here). Skipping the list * lock is safe here, and netpoll_cleanup() will sleep. */ list_for_each_entry_safe(nt, tmp, &target_list, list) { list_del(&nt->list); free_param_target(nt); } return err; } static void __exit cleanup_netconsole(void) { struct netconsole_target *nt, *tmp; if (console_is_registered(&netconsole_ext)) unregister_console(&netconsole_ext); if (console_is_registered(&netconsole)) unregister_console(&netconsole); dynamic_netconsole_exit(); unregister_netdevice_notifier(&netconsole_netdev_notifier); /* * Targets created via configfs pin references on our module * and would first be rmdir(2)'ed from userspace. We reach * here only when they are already destroyed, and only those * created from the boot/module option are left, so remove and * destroy them. Skipping the list lock is safe here, and * netpoll_cleanup() will sleep. */ list_for_each_entry_safe(nt, tmp, &target_list, list) { list_del(&nt->list); free_param_target(nt); } } /* * Use late_initcall to ensure netconsole is * initialized after network device driver if built-in. * * late_initcall() and module_init() are identical if built as module. */ late_initcall(init_netconsole); module_exit(cleanup_netconsole); |
| 1192 336 1192 | 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 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_IVERSION_H #define _LINUX_IVERSION_H #include <linux/fs.h> /* * The inode->i_version field: * --------------------------- * The change attribute (i_version) is mandated by NFSv4 and is mostly for * knfsd, but is also used for other purposes (e.g. IMA). The i_version must * appear larger to observers if there was an explicit change to the inode's * data or metadata since it was last queried. * * An explicit change is one that would ordinarily result in a change to the * inode status change time (aka ctime). i_version must appear to change, even * if the ctime does not (since the whole point is to avoid missing updates due * to timestamp granularity). If POSIX or other relevant spec mandates that the * ctime must change due to an operation, then the i_version counter must be * incremented as well. * * Making the i_version update completely atomic with the operation itself would * be prohibitively expensive. Traditionally the kernel has updated the times on * directories after an operation that changes its contents. For regular files, * the ctime is usually updated before the data is copied into the cache for a * write. This means that there is a window of time when an observer can * associate a new timestamp with old file contents. Since the purpose of the * i_version is to allow for better cache coherency, the i_version must always * be updated after the results of the operation are visible. Updating it before * and after a change is also permitted. (Note that no filesystems currently do * this. Fixing that is a work-in-progress). * * Observers see the i_version as a 64-bit number that never decreases. If it * remains the same since it was last checked, then nothing has changed in the * inode. If it's different then something has changed. Observers cannot infer * anything about the nature or magnitude of the changes from the value, only * that the inode has changed in some fashion. * * Not all filesystems properly implement the i_version counter. Subsystems that * want to use i_version field on an inode should first check whether the * filesystem sets the SB_I_VERSION flag (usually via the IS_I_VERSION macro). * * Those that set SB_I_VERSION will automatically have their i_version counter * incremented on writes to normal files. If the SB_I_VERSION is not set, then * the VFS will not touch it on writes, and the filesystem can use it how it * wishes. Note that the filesystem is always responsible for updating the * i_version on namespace changes in directories (mkdir, rmdir, unlink, etc.). * We consider these sorts of filesystems to have a kernel-managed i_version. * * It may be impractical for filesystems to keep i_version updates atomic with * respect to the changes that cause them. They should, however, guarantee * that i_version updates are never visible before the changes that caused * them. Also, i_version updates should never be delayed longer than it takes * the original change to reach disk. * * This implementation uses the low bit in the i_version field as a flag to * track when the value has been queried. If it has not been queried since it * was last incremented, we can skip the increment in most cases. * * In the event that we're updating the ctime, we will usually go ahead and * bump the i_version anyway. Since that has to go to stable storage in some * fashion, we might as well increment it as well. * * With this implementation, the value should always appear to observers to * increase over time if the file has changed. It's recommended to use * inode_eq_iversion() helper to compare values. * * Note that some filesystems (e.g. NFS and AFS) just use the field to store * a server-provided value (for the most part). For that reason, those * filesystems do not set SB_I_VERSION. These filesystems are considered to * have a self-managed i_version. * * Persistently storing the i_version * ---------------------------------- * Queries of the i_version field are not gated on them hitting the backing * store. It's always possible that the host could crash after allowing * a query of the value but before it has made it to disk. * * To mitigate this problem, filesystems should always use * inode_set_iversion_queried when loading an existing inode from disk. This * ensures that the next attempted inode increment will result in the value * changing. * * Storing the value to disk therefore does not count as a query, so those * filesystems should use inode_peek_iversion to grab the value to be stored. * There is no need to flag the value as having been queried in that case. */ /* * We borrow the lowest bit in the i_version to use as a flag to tell whether * it has been queried since we last incremented it. If it has, then we must * increment it on the next change. After that, we can clear the flag and * avoid incrementing it again until it has again been queried. */ #define I_VERSION_QUERIED_SHIFT (1) #define I_VERSION_QUERIED (1ULL << (I_VERSION_QUERIED_SHIFT - 1)) #define I_VERSION_INCREMENT (1ULL << I_VERSION_QUERIED_SHIFT) /** * inode_set_iversion_raw - set i_version to the specified raw value * @inode: inode to set * @val: new i_version value to set * * Set @inode's i_version field to @val. This function is for use by * filesystems that self-manage the i_version. * * For example, the NFS client stores its NFSv4 change attribute in this way, * and the AFS client stores the data_version from the server here. */ static inline void inode_set_iversion_raw(struct inode *inode, u64 val) { atomic64_set(&inode->i_version, val); } /** * inode_peek_iversion_raw - grab a "raw" iversion value * @inode: inode from which i_version should be read * * Grab a "raw" inode->i_version value and return it. The i_version is not * flagged or converted in any way. This is mostly used to access a self-managed * i_version. * * With those filesystems, we want to treat the i_version as an entirely * opaque value. */ static inline u64 inode_peek_iversion_raw(const struct inode *inode) { return atomic64_read(&inode->i_version); } /** * inode_set_max_iversion_raw - update i_version new value is larger * @inode: inode to set * @val: new i_version to set * * Some self-managed filesystems (e.g Ceph) will only update the i_version * value if the new value is larger than the one we already have. */ static inline void inode_set_max_iversion_raw(struct inode *inode, u64 val) { u64 cur = inode_peek_iversion_raw(inode); do { if (cur > val) break; } while (!atomic64_try_cmpxchg(&inode->i_version, &cur, val)); } /** * inode_set_iversion - set i_version to a particular value * @inode: inode to set * @val: new i_version value to set * * Set @inode's i_version field to @val. This function is for filesystems with * a kernel-managed i_version, for initializing a newly-created inode from * scratch. * * In this case, we do not set the QUERIED flag since we know that this value * has never been queried. */ static inline void inode_set_iversion(struct inode *inode, u64 val) { inode_set_iversion_raw(inode, val << I_VERSION_QUERIED_SHIFT); } /** * inode_set_iversion_queried - set i_version to a particular value as quereied * @inode: inode to set * @val: new i_version value to set * * Set @inode's i_version field to @val, and flag it for increment on the next * change. * * Filesystems that persistently store the i_version on disk should use this * when loading an existing inode from disk. * * When loading in an i_version value from a backing store, we can't be certain * that it wasn't previously viewed before being stored. Thus, we must assume * that it was, to ensure that we don't end up handing out the same value for * different versions of the same inode. */ static inline void inode_set_iversion_queried(struct inode *inode, u64 val) { inode_set_iversion_raw(inode, (val << I_VERSION_QUERIED_SHIFT) | I_VERSION_QUERIED); } bool inode_maybe_inc_iversion(struct inode *inode, bool force); /** * inode_inc_iversion - forcibly increment i_version * @inode: inode that needs to be updated * * Forcbily increment the i_version field. This always results in a change to * the observable value. */ static inline void inode_inc_iversion(struct inode *inode) { inode_maybe_inc_iversion(inode, true); } /** * inode_iversion_need_inc - is the i_version in need of being incremented? * @inode: inode to check * * Returns whether the inode->i_version counter needs incrementing on the next * change. Just fetch the value and check the QUERIED flag. */ static inline bool inode_iversion_need_inc(struct inode *inode) { return inode_peek_iversion_raw(inode) & I_VERSION_QUERIED; } /** * inode_inc_iversion_raw - forcibly increment raw i_version * @inode: inode that needs to be updated * * Forcbily increment the raw i_version field. This always results in a change * to the raw value. * * NFS will use the i_version field to store the value from the server. It * mostly treats it as opaque, but in the case where it holds a write * delegation, it must increment the value itself. This function does that. */ static inline void inode_inc_iversion_raw(struct inode *inode) { atomic64_inc(&inode->i_version); } /** * inode_peek_iversion - read i_version without flagging it to be incremented * @inode: inode from which i_version should be read * * Read the inode i_version counter for an inode without registering it as a * query. * * This is typically used by local filesystems that need to store an i_version * on disk. In that situation, it's not necessary to flag it as having been * viewed, as the result won't be used to gauge changes from that point. */ static inline u64 inode_peek_iversion(const struct inode *inode) { return inode_peek_iversion_raw(inode) >> I_VERSION_QUERIED_SHIFT; } /* * For filesystems without any sort of change attribute, the best we can * do is fake one up from the ctime: */ static inline u64 time_to_chattr(const struct timespec64 *t) { u64 chattr = t->tv_sec; chattr <<= 32; chattr += t->tv_nsec; return chattr; } u64 inode_query_iversion(struct inode *inode); /** * inode_eq_iversion_raw - check whether the raw i_version counter has changed * @inode: inode to check * @old: old value to check against its i_version * * Compare the current raw i_version counter with a previous one. Returns true * if they are the same or false if they are different. */ static inline bool inode_eq_iversion_raw(const struct inode *inode, u64 old) { return inode_peek_iversion_raw(inode) == old; } /** * inode_eq_iversion - check whether the i_version counter has changed * @inode: inode to check * @old: old value to check against its i_version * * Compare an i_version counter with a previous one. Returns true if they are * the same, and false if they are different. * * Note that we don't need to set the QUERIED flag in this case, as the value * in the inode is not being recorded for later use. */ static inline bool inode_eq_iversion(const struct inode *inode, u64 old) { return inode_peek_iversion(inode) == old; } #endif |
| 4 4 4 4 4 4 4 1 5 38 38 38 37 38 38 38 37 38 37 38 4 4 4 38 | 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 | // SPDX-License-Identifier: GPL-2.0-only /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Generic TIME_WAIT sockets functions * * From code orinally in TCP */ #include <linux/kernel.h> #include <linux/slab.h> #include <linux/module.h> #include <net/inet_hashtables.h> #include <net/inet_timewait_sock.h> #include <net/ip.h> #include <net/tcp.h> #include <net/psp.h> /** * inet_twsk_bind_unhash - unhash a timewait socket from bind hash * @tw: timewait socket * @hashinfo: hashinfo pointer * * unhash a timewait socket from bind hash, if hashed. * bind hash lock must be held by caller. * Returns 1 if caller should call inet_twsk_put() after lock release. */ void inet_twsk_bind_unhash(struct inet_timewait_sock *tw, struct inet_hashinfo *hashinfo) { struct inet_bind2_bucket *tb2 = tw->tw_tb2; struct inet_bind_bucket *tb = tw->tw_tb; if (!tb) return; __sk_del_bind_node((struct sock *)tw); tw->tw_tb = NULL; tw->tw_tb2 = NULL; inet_bind2_bucket_destroy(hashinfo->bind2_bucket_cachep, tb2); inet_bind_bucket_destroy(tb); __sock_put((struct sock *)tw); } /* Must be called with locally disabled BHs. */ static void inet_twsk_kill(struct inet_timewait_sock *tw) { struct inet_hashinfo *hashinfo = tw->tw_dr->hashinfo; spinlock_t *lock = inet_ehash_lockp(hashinfo, tw->tw_hash); struct inet_bind_hashbucket *bhead, *bhead2; spin_lock(lock); sk_nulls_del_node_init_rcu((struct sock *)tw); spin_unlock(lock); /* Disassociate with bind bucket. */ bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), tw->tw_num, hashinfo->bhash_size)]; bhead2 = inet_bhashfn_portaddr(hashinfo, (struct sock *)tw, twsk_net(tw), tw->tw_num); spin_lock(&bhead->lock); spin_lock(&bhead2->lock); inet_twsk_bind_unhash(tw, hashinfo); spin_unlock(&bhead2->lock); spin_unlock(&bhead->lock); refcount_dec(&tw->tw_dr->tw_refcount); inet_twsk_put(tw); } void inet_twsk_free(struct inet_timewait_sock *tw) { struct module *owner = tw->tw_prot->owner; tcp_twsk_destructor((struct sock *)tw); kmem_cache_free(tw->tw_prot->twsk_prot->twsk_slab, tw); module_put(owner); } void inet_twsk_put(struct inet_timewait_sock *tw) { if (refcount_dec_and_test(&tw->tw_refcnt)) inet_twsk_free(tw); } EXPORT_SYMBOL_GPL(inet_twsk_put); static void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw, struct hlist_nulls_head *list) { hlist_nulls_add_head_rcu(&tw->tw_node, list); } static void inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo) { __inet_twsk_schedule(tw, timeo, false); } /* * Enter the time wait state. * Essentially we whip up a timewait bucket, copy the relevant info into it * from the SK, and mess with hash chains and list linkage. * * The caller must not access @tw anymore after this function returns. */ void inet_twsk_hashdance_schedule(struct inet_timewait_sock *tw, struct sock *sk, struct inet_hashinfo *hashinfo, int timeo) { const struct inet_sock *inet = inet_sk(sk); const struct inet_connection_sock *icsk = inet_csk(sk); struct inet_ehash_bucket *ehead = inet_ehash_bucket(hashinfo, sk->sk_hash); spinlock_t *lock = inet_ehash_lockp(hashinfo, sk->sk_hash); struct inet_bind_hashbucket *bhead, *bhead2; /* Step 1: Put TW into bind hash. Original socket stays there too. Note, that any socket with inet->num != 0 MUST be bound in binding cache, even if it is closed. */ bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), inet->inet_num, hashinfo->bhash_size)]; bhead2 = inet_bhashfn_portaddr(hashinfo, sk, twsk_net(tw), inet->inet_num); local_bh_disable(); spin_lock(&bhead->lock); spin_lock(&bhead2->lock); tw->tw_tb = icsk->icsk_bind_hash; WARN_ON(!icsk->icsk_bind_hash); tw->tw_tb2 = icsk->icsk_bind2_hash; WARN_ON(!icsk->icsk_bind2_hash); sk_add_bind_node((struct sock *)tw, &tw->tw_tb2->owners); spin_unlock(&bhead2->lock); spin_unlock(&bhead->lock); spin_lock(lock); /* Step 2: Hash TW into tcp ehash chain */ inet_twsk_add_node_rcu(tw, &ehead->chain); /* Step 3: Remove SK from hash chain */ if (__sk_nulls_del_node_init_rcu(sk)) sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); /* Ensure above writes are committed into memory before updating the * refcount. * Provides ordering vs later refcount_inc(). */ smp_wmb(); /* tw_refcnt is set to 3 because we have : * - one reference for bhash chain. * - one reference for ehash chain. * - one reference for timer. * Also note that after this point, we lost our implicit reference * so we are not allowed to use tw anymore. */ refcount_set(&tw->tw_refcnt, 3); inet_twsk_schedule(tw, timeo); spin_unlock(lock); local_bh_enable(); } static void tw_timer_handler(struct timer_list *t) { struct inet_timewait_sock *tw = timer_container_of(tw, t, tw_timer); inet_twsk_kill(tw); } struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, struct inet_timewait_death_row *dr, const int state) { struct inet_timewait_sock *tw; if (refcount_read(&dr->tw_refcount) - 1 >= READ_ONCE(dr->sysctl_max_tw_buckets)) return NULL; tw = kmem_cache_alloc(sk->sk_prot_creator->twsk_prot->twsk_slab, GFP_ATOMIC); if (tw) { const struct inet_sock *inet = inet_sk(sk); tw->tw_dr = dr; /* Give us an identity. */ tw->tw_daddr = inet->inet_daddr; tw->tw_rcv_saddr = inet->inet_rcv_saddr; tw->tw_bound_dev_if = sk->sk_bound_dev_if; tw->tw_tos = inet->tos; tw->tw_num = inet->inet_num; tw->tw_state = TCP_TIME_WAIT; tw->tw_substate = state; tw->tw_sport = inet->inet_sport; tw->tw_dport = inet->inet_dport; tw->tw_family = sk->sk_family; tw->tw_reuse = sk->sk_reuse; tw->tw_reuseport = sk->sk_reuseport; tw->tw_hash = sk->sk_hash; tw->tw_ipv6only = 0; tw->tw_transparent = inet_test_bit(TRANSPARENT, sk); tw->tw_connect_bind = !!(sk->sk_userlocks & SOCK_CONNECT_BIND); tw->tw_prot = sk->sk_prot_creator; atomic64_set(&tw->tw_cookie, atomic64_read(&sk->sk_cookie)); twsk_net_set(tw, sock_net(sk)); timer_setup(&tw->tw_timer, tw_timer_handler, 0); #ifdef CONFIG_SOCK_VALIDATE_XMIT tw->tw_validate_xmit_skb = NULL; #endif /* * Because we use RCU lookups, we should not set tw_refcnt * to a non null value before everything is setup for this * timewait socket. */ refcount_set(&tw->tw_refcnt, 0); __module_get(tw->tw_prot->owner); psp_twsk_init(tw, sk); } return tw; } /* These are always called from BH context. See callers in * tcp_input.c to verify this. */ /* This is for handling early-kills of TIME_WAIT sockets. * Warning : consume reference. * Caller should not access tw anymore. */ void inet_twsk_deschedule_put(struct inet_timewait_sock *tw) { struct inet_hashinfo *hashinfo = tw->tw_dr->hashinfo; spinlock_t *lock = inet_ehash_lockp(hashinfo, tw->tw_hash); /* inet_twsk_purge() walks over all sockets, including tw ones, * and removes them via inet_twsk_deschedule_put() after a * refcount_inc_not_zero(). * * inet_twsk_hashdance_schedule() must (re)init the refcount before * arming the timer, i.e. inet_twsk_purge can obtain a reference to * a twsk that did not yet schedule the timer. * * The ehash lock synchronizes these two: * After acquiring the lock, the timer is always scheduled (else * timer_shutdown returns false), because hashdance_schedule releases * the ehash lock only after completing the timer initialization. * * Without grabbing the ehash lock, we get: * 1) cpu x sets twsk refcount to 3 * 2) cpu y bumps refcount to 4 * 3) cpu y calls inet_twsk_deschedule_put() and shuts timer down * 4) cpu x tries to start timer, but mod_timer is a noop post-shutdown * -> timer refcount is never decremented. */ spin_lock(lock); /* Makes sure hashdance_schedule() has completed */ spin_unlock(lock); if (timer_shutdown_sync(&tw->tw_timer)) inet_twsk_kill(tw); inet_twsk_put(tw); } EXPORT_SYMBOL(inet_twsk_deschedule_put); void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo, bool rearm) { /* timeout := RTO * 3.5 * * 3.5 = 1+2+0.5 to wait for two retransmits. * * RATIONALE: if FIN arrived and we entered TIME-WAIT state, * our ACK acking that FIN can be lost. If N subsequent retransmitted * FINs (or previous seqments) are lost (probability of such event * is p^(N+1), where p is probability to lose single packet and * time to detect the loss is about RTO*(2^N - 1) with exponential * backoff). Normal timewait length is calculated so, that we * waited at least for one retransmitted FIN (maximal RTO is 120sec). * [ BTW Linux. following BSD, violates this requirement waiting * only for 60sec, we should wait at least for 240 secs. * Well, 240 consumes too much of resources 8) * ] * This interval is not reduced to catch old duplicate and * responces to our wandering segments living for two MSLs. * However, if we use PAWS to detect * old duplicates, we can reduce the interval to bounds required * by RTO, rather than MSL. So, if peer understands PAWS, we * kill tw bucket after 3.5*RTO (it is important that this number * is greater than TS tick!) and detect old duplicates with help * of PAWS. */ if (!rearm) { bool kill = timeo <= 4*HZ; __NET_INC_STATS(twsk_net(tw), kill ? LINUX_MIB_TIMEWAITKILLED : LINUX_MIB_TIMEWAITED); BUG_ON(mod_timer(&tw->tw_timer, jiffies + timeo)); refcount_inc(&tw->tw_dr->tw_refcount); } else { mod_timer_pending(&tw->tw_timer, jiffies + timeo); } } /* Remove all non full sockets (TIME_WAIT and NEW_SYN_RECV) for dead netns */ void inet_twsk_purge(struct inet_hashinfo *hashinfo) { struct inet_ehash_bucket *head = &hashinfo->ehash[0]; unsigned int ehash_mask = hashinfo->ehash_mask; struct hlist_nulls_node *node; unsigned int slot; struct sock *sk; for (slot = 0; slot <= ehash_mask; slot++, head++) { if (hlist_nulls_empty(&head->chain)) continue; restart_rcu: cond_resched(); rcu_read_lock(); restart: sk_nulls_for_each_rcu(sk, node, &head->chain) { int state = inet_sk_state_load(sk); if ((1 << state) & ~(TCPF_TIME_WAIT | TCPF_NEW_SYN_RECV)) continue; if (check_net(sock_net(sk))) continue; if (unlikely(!refcount_inc_not_zero(&sk->sk_refcnt))) continue; if (check_net(sock_net(sk))) { sock_gen_put(sk); goto restart; } rcu_read_unlock(); local_bh_disable(); if (state == TCP_TIME_WAIT) { inet_twsk_deschedule_put(inet_twsk(sk)); } else { struct request_sock *req = inet_reqsk(sk); inet_csk_reqsk_queue_drop_and_put(req->rsk_listener, req); } local_bh_enable(); goto restart_rcu; } /* If the nulls value we got at the end of this lookup is * not the expected one, we must restart lookup. * We probably met an item that was moved to another chain. */ if (get_nulls_value(node) != slot) goto restart; rcu_read_unlock(); } } |
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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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * dir.c * * Creates, reads, walks and deletes directory-nodes * * Copyright (C) 2002, 2004 Oracle. All rights reserved. * * Portions of this code from linux/fs/ext3/dir.c * * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card (card@masi.ibp.fr) * Laboratoire MASI - Institut Blaise pascal * Universite Pierre et Marie Curie (Paris VI) * * from * * linux/fs/minix/dir.c * * Copyright (C) 1991, 1992 Linus Torvalds */ #include <linux/fs.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/highmem.h> #include <linux/quotaops.h> #include <linux/sort.h> #include <linux/iversion.h> #include <cluster/masklog.h> #include "ocfs2.h" #include "alloc.h" #include "blockcheck.h" #include "dir.h" #include "dlmglue.h" #include "extent_map.h" #include "file.h" #include "inode.h" #include "journal.h" #include "namei.h" #include "suballoc.h" #include "super.h" #include "sysfile.h" #include "uptodate.h" #include "ocfs2_trace.h" #include "buffer_head_io.h" #define NAMEI_RA_CHUNKS 2 #define NAMEI_RA_BLOCKS 4 #define NAMEI_RA_SIZE (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS) static int ocfs2_do_extend_dir(struct super_block *sb, handle_t *handle, struct inode *dir, struct buffer_head *parent_fe_bh, struct ocfs2_alloc_context *data_ac, struct ocfs2_alloc_context *meta_ac, struct buffer_head **new_bh); static int ocfs2_dir_indexed(struct inode *inode); /* * These are distinct checks because future versions of the file system will * want to have a trailing dirent structure independent of indexing. */ static int ocfs2_supports_dir_trailer(struct inode *dir) { struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) return 0; return ocfs2_meta_ecc(osb) || ocfs2_dir_indexed(dir); } /* * "new' here refers to the point at which we're creating a new * directory via "mkdir()", but also when we're expanding an inline * directory. In either case, we don't yet have the indexing bit set * on the directory, so the standard checks will fail in when metaecc * is turned off. Only directory-initialization type functions should * use this then. Everything else wants ocfs2_supports_dir_trailer() */ static int ocfs2_new_dir_wants_trailer(struct inode *dir) { struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); return ocfs2_meta_ecc(osb) || ocfs2_supports_indexed_dirs(osb); } static inline unsigned int ocfs2_dir_trailer_blk_off(struct super_block *sb) { return sb->s_blocksize - sizeof(struct ocfs2_dir_block_trailer); } #define ocfs2_trailer_from_bh(_bh, _sb) ((struct ocfs2_dir_block_trailer *) ((_bh)->b_data + ocfs2_dir_trailer_blk_off((_sb)))) /* XXX ocfs2_block_dqtrailer() is similar but not quite - can we make * them more consistent? */ struct ocfs2_dir_block_trailer *ocfs2_dir_trailer_from_size(int blocksize, void *data) { char *p = data; p += blocksize - sizeof(struct ocfs2_dir_block_trailer); return (struct ocfs2_dir_block_trailer *)p; } /* * XXX: This is executed once on every dirent. We should consider optimizing * it. */ static int ocfs2_skip_dir_trailer(struct inode *dir, struct ocfs2_dir_entry *de, unsigned long offset, unsigned long blklen) { unsigned long toff = blklen - sizeof(struct ocfs2_dir_block_trailer); if (!ocfs2_supports_dir_trailer(dir)) return 0; if (offset != toff) return 0; return 1; } static void ocfs2_init_dir_trailer(struct inode *inode, struct buffer_head *bh, u16 rec_len) { struct ocfs2_dir_block_trailer *trailer; trailer = ocfs2_trailer_from_bh(bh, inode->i_sb); strcpy(trailer->db_signature, OCFS2_DIR_TRAILER_SIGNATURE); trailer->db_compat_rec_len = cpu_to_le16(sizeof(struct ocfs2_dir_block_trailer)); trailer->db_parent_dinode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); trailer->db_blkno = cpu_to_le64(bh->b_blocknr); trailer->db_free_rec_len = cpu_to_le16(rec_len); } /* * Link an unindexed block with a dir trailer structure into the index free * list. This function will modify dirdata_bh, but assumes you've already * passed it to the journal. */ static int ocfs2_dx_dir_link_trailer(struct inode *dir, handle_t *handle, struct buffer_head *dx_root_bh, struct buffer_head *dirdata_bh) { int ret; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dir_block_trailer *trailer; ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } trailer = ocfs2_trailer_from_bh(dirdata_bh, dir->i_sb); dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; trailer->db_free_next = dx_root->dr_free_blk; dx_root->dr_free_blk = cpu_to_le64(dirdata_bh->b_blocknr); ocfs2_journal_dirty(handle, dx_root_bh); out: return ret; } static int ocfs2_free_list_at_root(struct ocfs2_dir_lookup_result *res) { return res->dl_prev_leaf_bh == NULL; } void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res) { brelse(res->dl_dx_root_bh); brelse(res->dl_leaf_bh); brelse(res->dl_dx_leaf_bh); brelse(res->dl_prev_leaf_bh); } static int ocfs2_dir_indexed(struct inode *inode) { if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INDEXED_DIR_FL) return 1; return 0; } static inline int ocfs2_dx_root_inline(struct ocfs2_dx_root_block *dx_root) { return dx_root->dr_flags & OCFS2_DX_FLAG_INLINE; } /* * Hashing code adapted from ext3 */ #define DELTA 0x9E3779B9 static void TEA_transform(__u32 buf[4], __u32 const in[]) { __u32 sum = 0; __u32 b0 = buf[0], b1 = buf[1]; __u32 a = in[0], b = in[1], c = in[2], d = in[3]; int n = 16; do { sum += DELTA; b0 += ((b1 << 4)+a) ^ (b1+sum) ^ ((b1 >> 5)+b); b1 += ((b0 << 4)+c) ^ (b0+sum) ^ ((b0 >> 5)+d); } while (--n); buf[0] += b0; buf[1] += b1; } static void str2hashbuf(const char *msg, int len, __u32 *buf, int num) { __u32 pad, val; int i; pad = (__u32)len | ((__u32)len << 8); pad |= pad << 16; val = pad; if (len > num*4) len = num * 4; for (i = 0; i < len; i++) { if ((i % 4) == 0) val = pad; val = msg[i] + (val << 8); if ((i % 4) == 3) { *buf++ = val; val = pad; num--; } } if (--num >= 0) *buf++ = val; while (--num >= 0) *buf++ = pad; } static void ocfs2_dx_dir_name_hash(struct inode *dir, const char *name, int len, struct ocfs2_dx_hinfo *hinfo) { struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); const char *p; __u32 in[8], buf[4]; /* * XXX: Is this really necessary, if the index is never looked * at by readdir? Is a hash value of '0' a bad idea? */ if ((len == 1 && !strncmp(".", name, 1)) || (len == 2 && !strncmp("..", name, 2))) { buf[0] = buf[1] = 0; goto out; } #ifdef OCFS2_DEBUG_DX_DIRS /* * This makes it very easy to debug indexing problems. We * should never allow this to be selected without hand editing * this file though. */ buf[0] = buf[1] = len; goto out; #endif memcpy(buf, osb->osb_dx_seed, sizeof(buf)); p = name; while (len > 0) { str2hashbuf(p, len, in, 4); TEA_transform(buf, in); len -= 16; p += 16; } out: hinfo->major_hash = buf[0]; hinfo->minor_hash = buf[1]; } /* * bh passed here can be an inode block or a dir data block, depending * on the inode inline data flag. */ static int ocfs2_check_dir_entry(struct inode *dir, struct ocfs2_dir_entry *de, struct buffer_head *bh, char *buf, unsigned int size, unsigned long offset) { const char *error_msg = NULL; const int rlen = le16_to_cpu(de->rec_len); const unsigned long next_offset = ((char *) de - buf) + rlen; if (unlikely(rlen < OCFS2_DIR_REC_LEN(1))) error_msg = "rec_len is smaller than minimal"; else if (unlikely(rlen % 4 != 0)) error_msg = "rec_len % 4 != 0"; else if (unlikely(rlen < OCFS2_DIR_REC_LEN(de->name_len))) error_msg = "rec_len is too small for name_len"; else if (unlikely(next_offset > size)) error_msg = "directory entry overrun"; else if (unlikely(next_offset > size - OCFS2_DIR_REC_LEN(1)) && next_offset != size) error_msg = "directory entry too close to end"; if (unlikely(error_msg != NULL)) mlog(ML_ERROR, "bad entry in directory #%llu: %s - " "offset=%lu, inode=%llu, rec_len=%d, name_len=%d\n", (unsigned long long)OCFS2_I(dir)->ip_blkno, error_msg, offset, (unsigned long long)le64_to_cpu(de->inode), rlen, de->name_len); return error_msg == NULL ? 1 : 0; } static inline int ocfs2_match(int len, const char * const name, struct ocfs2_dir_entry *de) { if (len != de->name_len) return 0; if (!de->inode) return 0; return !memcmp(name, de->name, len); } /* * Returns 0 if not found, -1 on failure, and 1 on success */ static inline int ocfs2_search_dirblock(struct buffer_head *bh, struct inode *dir, const char *name, int namelen, unsigned long offset, char *first_de, unsigned int bytes, struct ocfs2_dir_entry **res_dir) { struct ocfs2_dir_entry *de; char *dlimit, *de_buf; int de_len; int ret = 0; de_buf = first_de; dlimit = de_buf + bytes; while (de_buf < dlimit - OCFS2_DIR_MEMBER_LEN) { /* this code is executed quadratically often */ /* do minimal checking `by hand' */ de = (struct ocfs2_dir_entry *) de_buf; if (de->name + namelen <= dlimit && ocfs2_match(namelen, name, de)) { /* found a match - just to be sure, do a full check */ if (!ocfs2_check_dir_entry(dir, de, bh, first_de, bytes, offset)) { ret = -1; goto bail; } *res_dir = de; ret = 1; goto bail; } /* prevent looping on a bad block */ de_len = le16_to_cpu(de->rec_len); if (de_len <= 0) { ret = -1; goto bail; } de_buf += de_len; offset += de_len; } bail: trace_ocfs2_search_dirblock(ret); return ret; } static struct buffer_head *ocfs2_find_entry_id(const char *name, int namelen, struct inode *dir, struct ocfs2_dir_entry **res_dir) { int ret, found; struct buffer_head *di_bh = NULL; struct ocfs2_dinode *di; struct ocfs2_inline_data *data; ret = ocfs2_read_inode_block(dir, &di_bh); if (ret) { mlog_errno(ret); goto out; } di = (struct ocfs2_dinode *)di_bh->b_data; data = &di->id2.i_data; found = ocfs2_search_dirblock(di_bh, dir, name, namelen, 0, data->id_data, i_size_read(dir), res_dir); if (found == 1) return di_bh; brelse(di_bh); out: return NULL; } static int ocfs2_validate_dir_block(struct super_block *sb, struct buffer_head *bh) { int rc; struct ocfs2_dir_block_trailer *trailer = ocfs2_trailer_from_bh(bh, sb); /* * We don't validate dirents here, that's handled * in-place when the code walks them. */ trace_ocfs2_validate_dir_block((unsigned long long)bh->b_blocknr); BUG_ON(!buffer_uptodate(bh)); /* * If the ecc fails, we return the error but otherwise * leave the filesystem running. We know any error is * local to this block. * * Note that we are safe to call this even if the directory * doesn't have a trailer. Filesystems without metaecc will do * nothing, and filesystems with it will have one. */ rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &trailer->db_check); if (rc) mlog(ML_ERROR, "Checksum failed for dinode %llu\n", (unsigned long long)bh->b_blocknr); return rc; } /* * Validate a directory trailer. * * We check the trailer here rather than in ocfs2_validate_dir_block() * because that function doesn't have the inode to test. */ static int ocfs2_check_dir_trailer(struct inode *dir, struct buffer_head *bh) { int rc = 0; struct ocfs2_dir_block_trailer *trailer; trailer = ocfs2_trailer_from_bh(bh, dir->i_sb); if (!OCFS2_IS_VALID_DIR_TRAILER(trailer)) { rc = ocfs2_error(dir->i_sb, "Invalid dirblock #%llu: signature = %.*s\n", (unsigned long long)bh->b_blocknr, 7, trailer->db_signature); goto out; } if (le64_to_cpu(trailer->db_blkno) != bh->b_blocknr) { rc = ocfs2_error(dir->i_sb, "Directory block #%llu has an invalid db_blkno of %llu\n", (unsigned long long)bh->b_blocknr, (unsigned long long)le64_to_cpu(trailer->db_blkno)); goto out; } if (le64_to_cpu(trailer->db_parent_dinode) != OCFS2_I(dir)->ip_blkno) { rc = ocfs2_error(dir->i_sb, "Directory block #%llu on dinode #%llu has an invalid parent_dinode of %llu\n", (unsigned long long)bh->b_blocknr, (unsigned long long)OCFS2_I(dir)->ip_blkno, (unsigned long long)le64_to_cpu(trailer->db_blkno)); goto out; } out: return rc; } /* * This function forces all errors to -EIO for consistency with its * predecessor, ocfs2_bread(). We haven't audited what returning the * real error codes would do to callers. We log the real codes with * mlog_errno() before we squash them. */ static int ocfs2_read_dir_block(struct inode *inode, u64 v_block, struct buffer_head **bh, int flags) { int rc = 0; struct buffer_head *tmp = *bh; rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, flags, ocfs2_validate_dir_block); if (rc) { mlog_errno(rc); goto out; } if (!(flags & OCFS2_BH_READAHEAD) && ocfs2_supports_dir_trailer(inode)) { rc = ocfs2_check_dir_trailer(inode, tmp); if (rc) { if (!*bh) brelse(tmp); mlog_errno(rc); goto out; } } /* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */ if (!*bh) *bh = tmp; out: return rc ? -EIO : 0; } /* * Read the block at 'phys' which belongs to this directory * inode. This function does no virtual->physical block translation - * what's passed in is assumed to be a valid directory block. */ static int ocfs2_read_dir_block_direct(struct inode *dir, u64 phys, struct buffer_head **bh) { int ret; struct buffer_head *tmp = *bh; ret = ocfs2_read_block(INODE_CACHE(dir), phys, &tmp, ocfs2_validate_dir_block); if (ret) { mlog_errno(ret); goto out; } if (ocfs2_supports_dir_trailer(dir)) { ret = ocfs2_check_dir_trailer(dir, tmp); if (ret) { if (!*bh) brelse(tmp); mlog_errno(ret); goto out; } } if (!ret && !*bh) *bh = tmp; out: return ret; } static int ocfs2_validate_dx_root(struct super_block *sb, struct buffer_head *bh) { int ret; struct ocfs2_dx_root_block *dx_root; BUG_ON(!buffer_uptodate(bh)); dx_root = (struct ocfs2_dx_root_block *) bh->b_data; ret = ocfs2_validate_meta_ecc(sb, bh->b_data, &dx_root->dr_check); if (ret) { mlog(ML_ERROR, "Checksum failed for dir index root block %llu\n", (unsigned long long)bh->b_blocknr); return ret; } if (!OCFS2_IS_VALID_DX_ROOT(dx_root)) { ret = ocfs2_error(sb, "Dir Index Root # %llu has bad signature %.*s\n", (unsigned long long)le64_to_cpu(dx_root->dr_blkno), 7, dx_root->dr_signature); } return ret; } static int ocfs2_read_dx_root(struct inode *dir, struct ocfs2_dinode *di, struct buffer_head **dx_root_bh) { int ret; u64 blkno = le64_to_cpu(di->i_dx_root); struct buffer_head *tmp = *dx_root_bh; ret = ocfs2_read_block(INODE_CACHE(dir), blkno, &tmp, ocfs2_validate_dx_root); /* If ocfs2_read_block() got us a new bh, pass it up. */ if (!ret && !*dx_root_bh) *dx_root_bh = tmp; return ret; } static int ocfs2_validate_dx_leaf(struct super_block *sb, struct buffer_head *bh) { int ret; struct ocfs2_dx_leaf *dx_leaf = (struct ocfs2_dx_leaf *)bh->b_data; BUG_ON(!buffer_uptodate(bh)); ret = ocfs2_validate_meta_ecc(sb, bh->b_data, &dx_leaf->dl_check); if (ret) { mlog(ML_ERROR, "Checksum failed for dir index leaf block %llu\n", (unsigned long long)bh->b_blocknr); return ret; } if (!OCFS2_IS_VALID_DX_LEAF(dx_leaf)) { ret = ocfs2_error(sb, "Dir Index Leaf has bad signature %.*s\n", 7, dx_leaf->dl_signature); } return ret; } static int ocfs2_read_dx_leaf(struct inode *dir, u64 blkno, struct buffer_head **dx_leaf_bh) { int ret; struct buffer_head *tmp = *dx_leaf_bh; ret = ocfs2_read_block(INODE_CACHE(dir), blkno, &tmp, ocfs2_validate_dx_leaf); /* If ocfs2_read_block() got us a new bh, pass it up. */ if (!ret && !*dx_leaf_bh) *dx_leaf_bh = tmp; return ret; } /* * Read a series of dx_leaf blocks. This expects all buffer_head * pointers to be NULL on function entry. */ static int ocfs2_read_dx_leaves(struct inode *dir, u64 start, int num, struct buffer_head **dx_leaf_bhs) { int ret; ret = ocfs2_read_blocks(INODE_CACHE(dir), start, num, dx_leaf_bhs, 0, ocfs2_validate_dx_leaf); if (ret) mlog_errno(ret); return ret; } static struct buffer_head *ocfs2_find_entry_el(const char *name, int namelen, struct inode *dir, struct ocfs2_dir_entry **res_dir) { struct super_block *sb; struct buffer_head *bh_use[NAMEI_RA_SIZE]; struct buffer_head *bh, *ret = NULL; unsigned long start, block, b; int ra_max = 0; /* Number of bh's in the readahead buffer, bh_use[] */ int ra_ptr = 0; /* Current index into readahead buffer */ int num = 0; int nblocks, i; sb = dir->i_sb; nblocks = i_size_read(dir) >> sb->s_blocksize_bits; start = OCFS2_I(dir)->ip_dir_start_lookup; if (start >= nblocks) start = 0; block = start; restart: do { /* * We deal with the read-ahead logic here. */ if (ra_ptr >= ra_max) { /* Refill the readahead buffer */ ra_ptr = 0; b = block; for (ra_max = 0; ra_max < NAMEI_RA_SIZE; ra_max++) { /* * Terminate if we reach the end of the * directory and must wrap, or if our * search has finished at this block. */ if (b >= nblocks || (num && block == start)) { bh_use[ra_max] = NULL; break; } num++; bh = NULL; ocfs2_read_dir_block(dir, b++, &bh, OCFS2_BH_READAHEAD); bh_use[ra_max] = bh; } } if ((bh = bh_use[ra_ptr++]) == NULL) goto next; if (ocfs2_read_dir_block(dir, block, &bh, 0)) { /* read error, skip block & hope for the best. * ocfs2_read_dir_block() has released the bh. */ mlog(ML_ERROR, "reading directory %llu, " "offset %lu\n", (unsigned long long)OCFS2_I(dir)->ip_blkno, block); goto next; } i = ocfs2_search_dirblock(bh, dir, name, namelen, block << sb->s_blocksize_bits, bh->b_data, sb->s_blocksize, res_dir); if (i == 1) { OCFS2_I(dir)->ip_dir_start_lookup = block; ret = bh; goto cleanup_and_exit; } else { brelse(bh); if (i < 0) goto cleanup_and_exit; } next: if (++block >= nblocks) block = 0; } while (block != start); /* * If the directory has grown while we were searching, then * search the last part of the directory before giving up. */ block = nblocks; nblocks = i_size_read(dir) >> sb->s_blocksize_bits; if (block < nblocks) { start = 0; goto restart; } cleanup_and_exit: /* Clean up the read-ahead blocks */ for (; ra_ptr < ra_max; ra_ptr++) brelse(bh_use[ra_ptr]); trace_ocfs2_find_entry_el(ret); return ret; } static int ocfs2_dx_dir_lookup_rec(struct inode *inode, struct ocfs2_extent_list *el, u32 major_hash, u32 *ret_cpos, u64 *ret_phys_blkno, unsigned int *ret_clen) { int ret = 0, i, found; struct buffer_head *eb_bh = NULL; struct ocfs2_extent_block *eb; struct ocfs2_extent_rec *rec = NULL; if (el->l_tree_depth) { ret = ocfs2_find_leaf(INODE_CACHE(inode), el, major_hash, &eb_bh); if (ret) { mlog_errno(ret); goto out; } eb = (struct ocfs2_extent_block *) eb_bh->b_data; el = &eb->h_list; if (el->l_tree_depth) { ret = ocfs2_error(inode->i_sb, "Inode %lu has non zero tree depth in btree tree block %llu\n", inode->i_ino, (unsigned long long)eb_bh->b_blocknr); goto out; } } if (le16_to_cpu(el->l_next_free_rec) == 0) { ret = ocfs2_error(inode->i_sb, "Inode %lu has empty extent list at depth %u\n", inode->i_ino, le16_to_cpu(el->l_tree_depth)); goto out; } found = 0; for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { rec = &el->l_recs[i]; if (le32_to_cpu(rec->e_cpos) <= major_hash) { found = 1; break; } } if (!found) { ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in btree\n", inode->i_ino, le32_to_cpu(rec->e_cpos), ocfs2_rec_clusters(el, rec)); goto out; } if (ret_phys_blkno) *ret_phys_blkno = le64_to_cpu(rec->e_blkno); if (ret_cpos) *ret_cpos = le32_to_cpu(rec->e_cpos); if (ret_clen) *ret_clen = le16_to_cpu(rec->e_leaf_clusters); out: brelse(eb_bh); return ret; } /* * Returns the block index, from the start of the cluster which this * hash belongs too. */ static inline unsigned int __ocfs2_dx_dir_hash_idx(struct ocfs2_super *osb, u32 minor_hash) { return minor_hash & osb->osb_dx_mask; } static inline unsigned int ocfs2_dx_dir_hash_idx(struct ocfs2_super *osb, struct ocfs2_dx_hinfo *hinfo) { return __ocfs2_dx_dir_hash_idx(osb, hinfo->minor_hash); } static int ocfs2_dx_dir_lookup(struct inode *inode, struct ocfs2_extent_list *el, struct ocfs2_dx_hinfo *hinfo, u32 *ret_cpos, u64 *ret_phys_blkno) { int ret = 0; unsigned int cend, clen; u32 cpos; u64 blkno; u32 name_hash = hinfo->major_hash; ret = ocfs2_dx_dir_lookup_rec(inode, el, name_hash, &cpos, &blkno, &clen); if (ret) { mlog_errno(ret); goto out; } cend = cpos + clen; if (name_hash >= cend) { /* We want the last cluster */ blkno += ocfs2_clusters_to_blocks(inode->i_sb, clen - 1); cpos += clen - 1; } else { blkno += ocfs2_clusters_to_blocks(inode->i_sb, name_hash - cpos); cpos = name_hash; } /* * We now have the cluster which should hold our entry. To * find the exact block from the start of the cluster to * search, we take the lower bits of the hash. */ blkno += ocfs2_dx_dir_hash_idx(OCFS2_SB(inode->i_sb), hinfo); if (ret_phys_blkno) *ret_phys_blkno = blkno; if (ret_cpos) *ret_cpos = cpos; out: return ret; } static int ocfs2_dx_dir_search(const char *name, int namelen, struct inode *dir, struct ocfs2_dx_root_block *dx_root, struct ocfs2_dir_lookup_result *res) { int ret, i, found; u64 phys; struct buffer_head *dx_leaf_bh = NULL; struct ocfs2_dx_leaf *dx_leaf; struct ocfs2_dx_entry *dx_entry = NULL; struct buffer_head *dir_ent_bh = NULL; struct ocfs2_dir_entry *dir_ent = NULL; struct ocfs2_dx_hinfo *hinfo = &res->dl_hinfo; struct ocfs2_extent_list *dr_el; struct ocfs2_dx_entry_list *entry_list; ocfs2_dx_dir_name_hash(dir, name, namelen, &res->dl_hinfo); if (ocfs2_dx_root_inline(dx_root)) { entry_list = &dx_root->dr_entries; goto search; } dr_el = &dx_root->dr_list; ret = ocfs2_dx_dir_lookup(dir, dr_el, hinfo, NULL, &phys); if (ret) { mlog_errno(ret); goto out; } trace_ocfs2_dx_dir_search((unsigned long long)OCFS2_I(dir)->ip_blkno, namelen, name, hinfo->major_hash, hinfo->minor_hash, (unsigned long long)phys); ret = ocfs2_read_dx_leaf(dir, phys, &dx_leaf_bh); if (ret) { mlog_errno(ret); goto out; } dx_leaf = (struct ocfs2_dx_leaf *) dx_leaf_bh->b_data; trace_ocfs2_dx_dir_search_leaf_info( le16_to_cpu(dx_leaf->dl_list.de_num_used), le16_to_cpu(dx_leaf->dl_list.de_count)); entry_list = &dx_leaf->dl_list; search: /* * Empty leaf is legal, so no need to check for that. */ found = 0; for (i = 0; i < le16_to_cpu(entry_list->de_num_used); i++) { dx_entry = &entry_list->de_entries[i]; if (hinfo->major_hash != le32_to_cpu(dx_entry->dx_major_hash) || hinfo->minor_hash != le32_to_cpu(dx_entry->dx_minor_hash)) continue; /* * Search unindexed leaf block now. We're not * guaranteed to find anything. */ ret = ocfs2_read_dir_block_direct(dir, le64_to_cpu(dx_entry->dx_dirent_blk), &dir_ent_bh); if (ret) { mlog_errno(ret); goto out; } /* * XXX: We should check the unindexed block here, * before using it. */ found = ocfs2_search_dirblock(dir_ent_bh, dir, name, namelen, 0, dir_ent_bh->b_data, dir->i_sb->s_blocksize, &dir_ent); if (found == 1) break; if (found == -1) { /* This means we found a bad directory entry. */ ret = -EIO; mlog_errno(ret); goto out; } brelse(dir_ent_bh); dir_ent_bh = NULL; } if (found <= 0) { ret = -ENOENT; goto out; } res->dl_leaf_bh = dir_ent_bh; res->dl_entry = dir_ent; res->dl_dx_leaf_bh = dx_leaf_bh; res->dl_dx_entry = dx_entry; ret = 0; out: if (ret) { brelse(dx_leaf_bh); brelse(dir_ent_bh); } return ret; } static int ocfs2_find_entry_dx(const char *name, int namelen, struct inode *dir, struct ocfs2_dir_lookup_result *lookup) { int ret; struct buffer_head *di_bh = NULL; struct ocfs2_dinode *di; struct buffer_head *dx_root_bh = NULL; struct ocfs2_dx_root_block *dx_root; ret = ocfs2_read_inode_block(dir, &di_bh); if (ret) { mlog_errno(ret); goto out; } di = (struct ocfs2_dinode *)di_bh->b_data; ret = ocfs2_read_dx_root(dir, di, &dx_root_bh); if (ret) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data; ret = ocfs2_dx_dir_search(name, namelen, dir, dx_root, lookup); if (ret) { if (ret != -ENOENT) mlog_errno(ret); goto out; } lookup->dl_dx_root_bh = dx_root_bh; dx_root_bh = NULL; out: brelse(di_bh); brelse(dx_root_bh); return ret; } /* * Try to find an entry of the provided name within 'dir'. * * If nothing was found, -ENOENT is returned. Otherwise, zero is * returned and the struct 'res' will contain information useful to * other directory manipulation functions. * * Caller can NOT assume anything about the contents of the * buffer_heads - they are passed back only so that it can be passed * into any one of the manipulation functions (add entry, delete * entry, etc). As an example, bh in the extent directory case is a * data block, in the inline-data case it actually points to an inode, * in the indexed directory case, multiple buffers are involved. */ int ocfs2_find_entry(const char *name, int namelen, struct inode *dir, struct ocfs2_dir_lookup_result *lookup) { struct buffer_head *bh; struct ocfs2_dir_entry *res_dir = NULL; int ret = 0; if (ocfs2_dir_indexed(dir)) return ocfs2_find_entry_dx(name, namelen, dir, lookup); if (unlikely(i_size_read(dir) <= 0)) { ret = -EFSCORRUPTED; mlog_errno(ret); goto out; } /* * The unindexed dir code only uses part of the lookup * structure, so there's no reason to push it down further * than this. */ if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { if (unlikely(i_size_read(dir) > dir->i_sb->s_blocksize)) { ret = -EFSCORRUPTED; mlog_errno(ret); goto out; } bh = ocfs2_find_entry_id(name, namelen, dir, &res_dir); } else { bh = ocfs2_find_entry_el(name, namelen, dir, &res_dir); } if (bh == NULL) return -ENOENT; lookup->dl_leaf_bh = bh; lookup->dl_entry = res_dir; out: return ret; } /* * Update inode number and type of a previously found directory entry. */ int ocfs2_update_entry(struct inode *dir, handle_t *handle, struct ocfs2_dir_lookup_result *res, struct inode *new_entry_inode) { int ret; ocfs2_journal_access_func access = ocfs2_journal_access_db; struct ocfs2_dir_entry *de = res->dl_entry; struct buffer_head *de_bh = res->dl_leaf_bh; /* * The same code works fine for both inline-data and extent * based directories, so no need to split this up. The only * difference is the journal_access function. */ if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) access = ocfs2_journal_access_di; ret = access(handle, INODE_CACHE(dir), de_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } de->inode = cpu_to_le64(OCFS2_I(new_entry_inode)->ip_blkno); ocfs2_set_de_type(de, new_entry_inode->i_mode); ocfs2_journal_dirty(handle, de_bh); out: return ret; } /* * __ocfs2_delete_entry deletes a directory entry by merging it with the * previous entry */ static int __ocfs2_delete_entry(handle_t *handle, struct inode *dir, struct ocfs2_dir_entry *de_del, struct buffer_head *bh, char *first_de, unsigned int bytes) { struct ocfs2_dir_entry *de, *pde; int i, status = -ENOENT; ocfs2_journal_access_func access = ocfs2_journal_access_db; if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) access = ocfs2_journal_access_di; i = 0; pde = NULL; de = (struct ocfs2_dir_entry *) first_de; while (i < bytes) { if (!ocfs2_check_dir_entry(dir, de, bh, first_de, bytes, i)) { status = -EIO; mlog_errno(status); goto bail; } if (de == de_del) { status = access(handle, INODE_CACHE(dir), bh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { status = -EIO; mlog_errno(status); goto bail; } if (pde) le16_add_cpu(&pde->rec_len, le16_to_cpu(de->rec_len)); de->inode = 0; inode_inc_iversion(dir); ocfs2_journal_dirty(handle, bh); goto bail; } i += le16_to_cpu(de->rec_len); pde = de; de = (struct ocfs2_dir_entry *)((char *)de + le16_to_cpu(de->rec_len)); } bail: return status; } static unsigned int ocfs2_figure_dirent_hole(struct ocfs2_dir_entry *de) { unsigned int hole; if (le64_to_cpu(de->inode) == 0) hole = le16_to_cpu(de->rec_len); else hole = le16_to_cpu(de->rec_len) - OCFS2_DIR_REC_LEN(de->name_len); return hole; } static int ocfs2_find_max_rec_len(struct super_block *sb, struct buffer_head *dirblock_bh) { int size, this_hole, largest_hole = 0; char *trailer, *de_buf, *limit, *start = dirblock_bh->b_data; struct ocfs2_dir_entry *de; trailer = (char *)ocfs2_trailer_from_bh(dirblock_bh, sb); size = ocfs2_dir_trailer_blk_off(sb); limit = start + size; de_buf = start; de = (struct ocfs2_dir_entry *)de_buf; do { if (de_buf != trailer) { this_hole = ocfs2_figure_dirent_hole(de); if (this_hole > largest_hole) largest_hole = this_hole; } de_buf += le16_to_cpu(de->rec_len); de = (struct ocfs2_dir_entry *)de_buf; } while (de_buf < limit); if (largest_hole >= OCFS2_DIR_MIN_REC_LEN) return largest_hole; return 0; } static void ocfs2_dx_list_remove_entry(struct ocfs2_dx_entry_list *entry_list, int index) { int num_used = le16_to_cpu(entry_list->de_num_used); if (num_used == 1 || index == (num_used - 1)) goto clear; memmove(&entry_list->de_entries[index], &entry_list->de_entries[index + 1], (num_used - index - 1)*sizeof(struct ocfs2_dx_entry)); clear: num_used--; memset(&entry_list->de_entries[num_used], 0, sizeof(struct ocfs2_dx_entry)); entry_list->de_num_used = cpu_to_le16(num_used); } static int ocfs2_delete_entry_dx(handle_t *handle, struct inode *dir, struct ocfs2_dir_lookup_result *lookup) { int ret, index, max_rec_len, add_to_free_list = 0; struct buffer_head *dx_root_bh = lookup->dl_dx_root_bh; struct buffer_head *leaf_bh = lookup->dl_leaf_bh; struct ocfs2_dx_leaf *dx_leaf; struct ocfs2_dx_entry *dx_entry = lookup->dl_dx_entry; struct ocfs2_dir_block_trailer *trailer; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dx_entry_list *entry_list; /* * This function gets a bit messy because we might have to * modify the root block, regardless of whether the indexed * entries are stored inline. */ /* * *Only* set 'entry_list' here, based on where we're looking * for the indexed entries. Later, we might still want to * journal both blocks, based on free list state. */ dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; if (ocfs2_dx_root_inline(dx_root)) { entry_list = &dx_root->dr_entries; } else { dx_leaf = (struct ocfs2_dx_leaf *) lookup->dl_dx_leaf_bh->b_data; entry_list = &dx_leaf->dl_list; } /* Neither of these are a disk corruption - that should have * been caught by lookup, before we got here. */ BUG_ON(le16_to_cpu(entry_list->de_count) <= 0); BUG_ON(le16_to_cpu(entry_list->de_num_used) <= 0); index = (char *)dx_entry - (char *)entry_list->de_entries; index /= sizeof(*dx_entry); if (index >= le16_to_cpu(entry_list->de_num_used)) { mlog(ML_ERROR, "Dir %llu: Bad dx_entry ptr idx %d, (%p, %p)\n", (unsigned long long)OCFS2_I(dir)->ip_blkno, index, entry_list, dx_entry); return -EIO; } /* * We know that removal of this dirent will leave enough room * for a new one, so add this block to the free list if it * isn't already there. */ trailer = ocfs2_trailer_from_bh(leaf_bh, dir->i_sb); if (trailer->db_free_rec_len == 0) add_to_free_list = 1; /* * Add the block holding our index into the journal before * removing the unindexed entry. If we get an error return * from __ocfs2_delete_entry(), then it hasn't removed the * entry yet. Likewise, successful return means we *must* * remove the indexed entry. * * We're also careful to journal the root tree block here as * the entry count needs to be updated. Also, we might be * adding to the start of the free list. */ ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } if (!ocfs2_dx_root_inline(dx_root)) { ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), lookup->dl_dx_leaf_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } } trace_ocfs2_delete_entry_dx((unsigned long long)OCFS2_I(dir)->ip_blkno, index); ret = __ocfs2_delete_entry(handle, dir, lookup->dl_entry, leaf_bh, leaf_bh->b_data, leaf_bh->b_size); if (ret) { mlog_errno(ret); goto out; } max_rec_len = ocfs2_find_max_rec_len(dir->i_sb, leaf_bh); trailer->db_free_rec_len = cpu_to_le16(max_rec_len); if (add_to_free_list) { trailer->db_free_next = dx_root->dr_free_blk; dx_root->dr_free_blk = cpu_to_le64(leaf_bh->b_blocknr); ocfs2_journal_dirty(handle, dx_root_bh); } /* leaf_bh was journal_accessed for us in __ocfs2_delete_entry */ ocfs2_journal_dirty(handle, leaf_bh); le32_add_cpu(&dx_root->dr_num_entries, -1); ocfs2_journal_dirty(handle, dx_root_bh); ocfs2_dx_list_remove_entry(entry_list, index); if (!ocfs2_dx_root_inline(dx_root)) ocfs2_journal_dirty(handle, lookup->dl_dx_leaf_bh); out: return ret; } static inline int ocfs2_delete_entry_id(handle_t *handle, struct inode *dir, struct ocfs2_dir_entry *de_del, struct buffer_head *bh) { int ret; struct buffer_head *di_bh = NULL; struct ocfs2_dinode *di; struct ocfs2_inline_data *data; ret = ocfs2_read_inode_block(dir, &di_bh); if (ret) { mlog_errno(ret); goto out; } di = (struct ocfs2_dinode *)di_bh->b_data; data = &di->id2.i_data; ret = __ocfs2_delete_entry(handle, dir, de_del, bh, data->id_data, i_size_read(dir)); brelse(di_bh); out: return ret; } static inline int ocfs2_delete_entry_el(handle_t *handle, struct inode *dir, struct ocfs2_dir_entry *de_del, struct buffer_head *bh) { return __ocfs2_delete_entry(handle, dir, de_del, bh, bh->b_data, bh->b_size); } /* * Delete a directory entry. Hide the details of directory * implementation from the caller. */ int ocfs2_delete_entry(handle_t *handle, struct inode *dir, struct ocfs2_dir_lookup_result *res) { if (ocfs2_dir_indexed(dir)) return ocfs2_delete_entry_dx(handle, dir, res); if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) return ocfs2_delete_entry_id(handle, dir, res->dl_entry, res->dl_leaf_bh); return ocfs2_delete_entry_el(handle, dir, res->dl_entry, res->dl_leaf_bh); } /* * Check whether 'de' has enough room to hold an entry of * 'new_rec_len' bytes. */ static inline int ocfs2_dirent_would_fit(struct ocfs2_dir_entry *de, unsigned int new_rec_len) { unsigned int de_really_used; /* Check whether this is an empty record with enough space */ if (le64_to_cpu(de->inode) == 0 && le16_to_cpu(de->rec_len) >= new_rec_len) return 1; /* * Record might have free space at the end which we can * use. */ de_really_used = OCFS2_DIR_REC_LEN(de->name_len); if (le16_to_cpu(de->rec_len) >= (de_really_used + new_rec_len)) return 1; return 0; } static void ocfs2_dx_dir_leaf_insert_tail(struct ocfs2_dx_leaf *dx_leaf, struct ocfs2_dx_entry *dx_new_entry) { int i; i = le16_to_cpu(dx_leaf->dl_list.de_num_used); dx_leaf->dl_list.de_entries[i] = *dx_new_entry; le16_add_cpu(&dx_leaf->dl_list.de_num_used, 1); } static void ocfs2_dx_entry_list_insert(struct ocfs2_dx_entry_list *entry_list, struct ocfs2_dx_hinfo *hinfo, u64 dirent_blk) { int i; struct ocfs2_dx_entry *dx_entry; i = le16_to_cpu(entry_list->de_num_used); dx_entry = &entry_list->de_entries[i]; memset(dx_entry, 0, sizeof(*dx_entry)); dx_entry->dx_major_hash = cpu_to_le32(hinfo->major_hash); dx_entry->dx_minor_hash = cpu_to_le32(hinfo->minor_hash); dx_entry->dx_dirent_blk = cpu_to_le64(dirent_blk); le16_add_cpu(&entry_list->de_num_used, 1); } static int __ocfs2_dx_dir_leaf_insert(struct inode *dir, handle_t *handle, struct ocfs2_dx_hinfo *hinfo, u64 dirent_blk, struct buffer_head *dx_leaf_bh) { int ret; struct ocfs2_dx_leaf *dx_leaf; ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), dx_leaf_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data; ocfs2_dx_entry_list_insert(&dx_leaf->dl_list, hinfo, dirent_blk); ocfs2_journal_dirty(handle, dx_leaf_bh); out: return ret; } static void ocfs2_dx_inline_root_insert(struct inode *dir, handle_t *handle, struct ocfs2_dx_hinfo *hinfo, u64 dirent_blk, struct ocfs2_dx_root_block *dx_root) { ocfs2_dx_entry_list_insert(&dx_root->dr_entries, hinfo, dirent_blk); } static int ocfs2_dx_dir_insert(struct inode *dir, handle_t *handle, struct ocfs2_dir_lookup_result *lookup) { int ret = 0; struct ocfs2_dx_root_block *dx_root; struct buffer_head *dx_root_bh = lookup->dl_dx_root_bh; ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *)lookup->dl_dx_root_bh->b_data; if (ocfs2_dx_root_inline(dx_root)) { ocfs2_dx_inline_root_insert(dir, handle, &lookup->dl_hinfo, lookup->dl_leaf_bh->b_blocknr, dx_root); } else { ret = __ocfs2_dx_dir_leaf_insert(dir, handle, &lookup->dl_hinfo, lookup->dl_leaf_bh->b_blocknr, lookup->dl_dx_leaf_bh); if (ret) goto out; } le32_add_cpu(&dx_root->dr_num_entries, 1); ocfs2_journal_dirty(handle, dx_root_bh); out: return ret; } static void ocfs2_remove_block_from_free_list(struct inode *dir, handle_t *handle, struct ocfs2_dir_lookup_result *lookup) { struct ocfs2_dir_block_trailer *trailer, *prev; struct ocfs2_dx_root_block *dx_root; struct buffer_head *bh; trailer = ocfs2_trailer_from_bh(lookup->dl_leaf_bh, dir->i_sb); if (ocfs2_free_list_at_root(lookup)) { bh = lookup->dl_dx_root_bh; dx_root = (struct ocfs2_dx_root_block *)bh->b_data; dx_root->dr_free_blk = trailer->db_free_next; } else { bh = lookup->dl_prev_leaf_bh; prev = ocfs2_trailer_from_bh(bh, dir->i_sb); prev->db_free_next = trailer->db_free_next; } trailer->db_free_rec_len = cpu_to_le16(0); trailer->db_free_next = cpu_to_le64(0); ocfs2_journal_dirty(handle, bh); ocfs2_journal_dirty(handle, lookup->dl_leaf_bh); } /* * This expects that a journal write has been reserved on * lookup->dl_prev_leaf_bh or lookup->dl_dx_root_bh */ static void ocfs2_recalc_free_list(struct inode *dir, handle_t *handle, struct ocfs2_dir_lookup_result *lookup) { int max_rec_len; struct ocfs2_dir_block_trailer *trailer; /* Walk dl_leaf_bh to figure out what the new free rec_len is. */ max_rec_len = ocfs2_find_max_rec_len(dir->i_sb, lookup->dl_leaf_bh); if (max_rec_len) { /* * There's still room in this block, so no need to remove it * from the free list. In this case, we just want to update * the rec len accounting. */ trailer = ocfs2_trailer_from_bh(lookup->dl_leaf_bh, dir->i_sb); trailer->db_free_rec_len = cpu_to_le16(max_rec_len); ocfs2_journal_dirty(handle, lookup->dl_leaf_bh); } else { ocfs2_remove_block_from_free_list(dir, handle, lookup); } } /* we don't always have a dentry for what we want to add, so people * like orphan dir can call this instead. * * The lookup context must have been filled from * ocfs2_prepare_dir_for_insert. */ int __ocfs2_add_entry(handle_t *handle, struct inode *dir, const char *name, int namelen, struct inode *inode, u64 blkno, struct buffer_head *parent_fe_bh, struct ocfs2_dir_lookup_result *lookup) { unsigned long offset; unsigned short rec_len; struct ocfs2_dir_entry *de, *de1; struct ocfs2_dinode *di = (struct ocfs2_dinode *)parent_fe_bh->b_data; struct super_block *sb = dir->i_sb; int retval; unsigned int size = sb->s_blocksize; struct buffer_head *insert_bh = lookup->dl_leaf_bh; char *data_start = insert_bh->b_data; if (ocfs2_dir_indexed(dir)) { struct buffer_head *bh; /* * An indexed dir may require that we update the free space * list. Reserve a write to the previous node in the list so * that we don't fail later. * * XXX: This can be either a dx_root_block, or an unindexed * directory tree leaf block. */ if (ocfs2_free_list_at_root(lookup)) { bh = lookup->dl_dx_root_bh; retval = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), bh, OCFS2_JOURNAL_ACCESS_WRITE); } else { bh = lookup->dl_prev_leaf_bh; retval = ocfs2_journal_access_db(handle, INODE_CACHE(dir), bh, OCFS2_JOURNAL_ACCESS_WRITE); } if (retval) { mlog_errno(retval); return retval; } } else if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { data_start = di->id2.i_data.id_data; size = i_size_read(dir); BUG_ON(insert_bh != parent_fe_bh); } rec_len = OCFS2_DIR_REC_LEN(namelen); offset = 0; de = (struct ocfs2_dir_entry *) data_start; while (1) { BUG_ON((char *)de >= (size + data_start)); /* These checks should've already been passed by the * prepare function, but I guess we can leave them * here anyway. */ if (!ocfs2_check_dir_entry(dir, de, insert_bh, data_start, size, offset)) { retval = -ENOENT; goto bail; } if (ocfs2_match(namelen, name, de)) { retval = -EEXIST; goto bail; } /* We're guaranteed that we should have space, so we * can't possibly have hit the trailer...right? */ mlog_bug_on_msg(ocfs2_skip_dir_trailer(dir, de, offset, size), "Hit dir trailer trying to insert %.*s " "(namelen %d) into directory %llu. " "offset is %lu, trailer offset is %d\n", namelen, name, namelen, (unsigned long long)parent_fe_bh->b_blocknr, offset, ocfs2_dir_trailer_blk_off(dir->i_sb)); if (ocfs2_dirent_would_fit(de, rec_len)) { inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); retval = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh); if (retval < 0) { mlog_errno(retval); goto bail; } if (insert_bh == parent_fe_bh) retval = ocfs2_journal_access_di(handle, INODE_CACHE(dir), insert_bh, OCFS2_JOURNAL_ACCESS_WRITE); else { retval = ocfs2_journal_access_db(handle, INODE_CACHE(dir), insert_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (!retval && ocfs2_dir_indexed(dir)) retval = ocfs2_dx_dir_insert(dir, handle, lookup); } if (retval) { mlog_errno(retval); goto bail; } /* By now the buffer is marked for journaling */ offset += le16_to_cpu(de->rec_len); if (le64_to_cpu(de->inode)) { de1 = (struct ocfs2_dir_entry *)((char *) de + OCFS2_DIR_REC_LEN(de->name_len)); de1->rec_len = cpu_to_le16(le16_to_cpu(de->rec_len) - OCFS2_DIR_REC_LEN(de->name_len)); de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); de = de1; } de->file_type = FT_UNKNOWN; if (blkno) { de->inode = cpu_to_le64(blkno); ocfs2_set_de_type(de, inode->i_mode); } else de->inode = 0; de->name_len = namelen; memcpy(de->name, name, namelen); if (ocfs2_dir_indexed(dir)) ocfs2_recalc_free_list(dir, handle, lookup); inode_inc_iversion(dir); ocfs2_journal_dirty(handle, insert_bh); retval = 0; goto bail; } offset += le16_to_cpu(de->rec_len); de = (struct ocfs2_dir_entry *) ((char *) de + le16_to_cpu(de->rec_len)); } /* when you think about it, the assert above should prevent us * from ever getting here. */ retval = -ENOSPC; bail: if (retval) mlog_errno(retval); return retval; } static int ocfs2_dir_foreach_blk_id(struct inode *inode, u64 *f_version, struct dir_context *ctx) { int ret, i; unsigned long offset = ctx->pos; struct buffer_head *di_bh = NULL; struct ocfs2_dinode *di; struct ocfs2_inline_data *data; struct ocfs2_dir_entry *de; ret = ocfs2_read_inode_block(inode, &di_bh); if (ret) { mlog(ML_ERROR, "Unable to read inode block for dir %llu\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); goto out; } di = (struct ocfs2_dinode *)di_bh->b_data; data = &di->id2.i_data; while (ctx->pos < i_size_read(inode)) { /* If the dir block has changed since the last call to * readdir(2), then we might be pointing to an invalid * dirent right now. Scan from the start of the block * to make sure. */ if (!inode_eq_iversion(inode, *f_version)) { for (i = 0; i < i_size_read(inode) && i < offset; ) { de = (struct ocfs2_dir_entry *) (data->id_data + i); /* It's too expensive to do a full * dirent test each time round this * loop, but we do have to test at * least that it is non-zero. A * failure will be detected in the * dirent test below. */ if (le16_to_cpu(de->rec_len) < OCFS2_DIR_REC_LEN(1)) break; i += le16_to_cpu(de->rec_len); } ctx->pos = offset = i; *f_version = inode_query_iversion(inode); } de = (struct ocfs2_dir_entry *) (data->id_data + ctx->pos); if (!ocfs2_check_dir_entry(inode, de, di_bh, (char *)data->id_data, i_size_read(inode), ctx->pos)) { /* On error, skip the f_pos to the end. */ ctx->pos = i_size_read(inode); break; } offset += le16_to_cpu(de->rec_len); if (le64_to_cpu(de->inode)) { if (!dir_emit(ctx, de->name, de->name_len, le64_to_cpu(de->inode), fs_ftype_to_dtype(de->file_type))) goto out; } ctx->pos += le16_to_cpu(de->rec_len); } out: brelse(di_bh); return 0; } /* * NOTE: This function can be called against unindexed directories, * and indexed ones. */ static int ocfs2_dir_foreach_blk_el(struct inode *inode, u64 *f_version, struct dir_context *ctx, bool persist) { unsigned long offset, blk, last_ra_blk = 0; int i; struct buffer_head * bh, * tmp; struct ocfs2_dir_entry * de; struct super_block * sb = inode->i_sb; unsigned int ra_sectors = 16; int stored = 0; bh = NULL; offset = ctx->pos & (sb->s_blocksize - 1); while (ctx->pos < i_size_read(inode)) { blk = ctx->pos >> sb->s_blocksize_bits; if (ocfs2_read_dir_block(inode, blk, &bh, 0)) { /* Skip the corrupt dirblock and keep trying */ ctx->pos += sb->s_blocksize - offset; continue; } /* The idea here is to begin with 8k read-ahead and to stay * 4k ahead of our current position. * * TODO: Use the pagecache for this. We just need to * make sure it's cluster-safe... */ if (!last_ra_blk || (((last_ra_blk - blk) << 9) <= (ra_sectors / 2))) { for (i = ra_sectors >> (sb->s_blocksize_bits - 9); i > 0; i--) { tmp = NULL; if (!ocfs2_read_dir_block(inode, ++blk, &tmp, OCFS2_BH_READAHEAD)) brelse(tmp); } last_ra_blk = blk; ra_sectors = 8; } /* If the dir block has changed since the last call to * readdir(2), then we might be pointing to an invalid * dirent right now. Scan from the start of the block * to make sure. */ if (!inode_eq_iversion(inode, *f_version)) { for (i = 0; i < sb->s_blocksize && i < offset; ) { de = (struct ocfs2_dir_entry *) (bh->b_data + i); /* It's too expensive to do a full * dirent test each time round this * loop, but we do have to test at * least that it is non-zero. A * failure will be detected in the * dirent test below. */ if (le16_to_cpu(de->rec_len) < OCFS2_DIR_REC_LEN(1)) break; i += le16_to_cpu(de->rec_len); } offset = i; ctx->pos = (ctx->pos & ~(sb->s_blocksize - 1)) | offset; *f_version = inode_query_iversion(inode); } while (ctx->pos < i_size_read(inode) && offset < sb->s_blocksize) { de = (struct ocfs2_dir_entry *) (bh->b_data + offset); if (!ocfs2_check_dir_entry(inode, de, bh, bh->b_data, sb->s_blocksize, offset)) { /* On error, skip the f_pos to the next block. */ ctx->pos = (ctx->pos | (sb->s_blocksize - 1)) + 1; break; } if (le64_to_cpu(de->inode)) { if (!dir_emit(ctx, de->name, de->name_len, le64_to_cpu(de->inode), fs_ftype_to_dtype(de->file_type))) { brelse(bh); return 0; } stored++; } offset += le16_to_cpu(de->rec_len); ctx->pos += le16_to_cpu(de->rec_len); } offset = 0; brelse(bh); bh = NULL; if (!persist && stored) break; } return 0; } static int ocfs2_dir_foreach_blk(struct inode *inode, u64 *f_version, struct dir_context *ctx, bool persist) { if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) return ocfs2_dir_foreach_blk_id(inode, f_version, ctx); return ocfs2_dir_foreach_blk_el(inode, f_version, ctx, persist); } /* * This is intended to be called from inside other kernel functions, * so we fake some arguments. */ int ocfs2_dir_foreach(struct inode *inode, struct dir_context *ctx) { u64 version = inode_query_iversion(inode); ocfs2_dir_foreach_blk(inode, &version, ctx, true); return 0; } /* * ocfs2_readdir() * */ int ocfs2_readdir(struct file *file, struct dir_context *ctx) { int error = 0; struct inode *inode = file_inode(file); struct ocfs2_file_private *fp = file->private_data; int lock_level = 0; trace_ocfs2_readdir((unsigned long long)OCFS2_I(inode)->ip_blkno); error = ocfs2_inode_lock_atime(inode, file->f_path.mnt, &lock_level, 1); if (lock_level && error >= 0) { /* We release EX lock which used to update atime * and get PR lock again to reduce contention * on commonly accessed directories. */ ocfs2_inode_unlock(inode, 1); lock_level = 0; error = ocfs2_inode_lock(inode, NULL, 0); } if (error < 0) { if (error != -ENOENT) mlog_errno(error); /* we haven't got any yet, so propagate the error. */ goto bail_nolock; } error = ocfs2_dir_foreach_blk(inode, &fp->cookie, ctx, false); ocfs2_inode_unlock(inode, lock_level); if (error) mlog_errno(error); bail_nolock: return error; } /* * NOTE: this should always be called with parent dir i_rwsem taken. */ int ocfs2_find_files_on_disk(const char *name, int namelen, u64 *blkno, struct inode *inode, struct ocfs2_dir_lookup_result *lookup) { int status = -ENOENT; trace_ocfs2_find_files_on_disk(namelen, name, blkno, (unsigned long long)OCFS2_I(inode)->ip_blkno); status = ocfs2_find_entry(name, namelen, inode, lookup); if (status) goto leave; *blkno = le64_to_cpu(lookup->dl_entry->inode); status = 0; leave: return status; } /* * Convenience function for callers which just want the block number * mapped to a name and don't require the full dirent info, etc. */ int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name, int namelen, u64 *blkno) { int ret; struct ocfs2_dir_lookup_result lookup = { NULL, }; ret = ocfs2_find_files_on_disk(name, namelen, blkno, dir, &lookup); ocfs2_free_dir_lookup_result(&lookup); return ret; } /* Check for a name within a directory. * * Return 0 if the name does not exist * Return -EEXIST if the directory contains the name * Return -EFSCORRUPTED if found corruption * * Callers should have i_rwsem + a cluster lock on dir */ int ocfs2_check_dir_for_entry(struct inode *dir, const char *name, int namelen) { int ret = 0; struct ocfs2_dir_lookup_result lookup = { NULL, }; trace_ocfs2_check_dir_for_entry( (unsigned long long)OCFS2_I(dir)->ip_blkno, namelen, name); ret = ocfs2_find_entry(name, namelen, dir, &lookup); if (ret == 0) { ret = -EEXIST; mlog_errno(ret); } else if (ret == -ENOENT) { ret = 0; } ocfs2_free_dir_lookup_result(&lookup); return ret; } struct ocfs2_empty_dir_priv { struct dir_context ctx; unsigned seen_dot; unsigned seen_dot_dot; unsigned seen_other; unsigned dx_dir; }; static bool ocfs2_empty_dir_filldir(struct dir_context *ctx, const char *name, int name_len, loff_t pos, u64 ino, unsigned type) { struct ocfs2_empty_dir_priv *p = container_of(ctx, struct ocfs2_empty_dir_priv, ctx); /* * Check the positions of "." and ".." records to be sure * they're in the correct place. * * Indexed directories don't need to proceed past the first * two entries, so we end the scan after seeing '..'. Despite * that, we allow the scan to proceed In the event that we * have a corrupted indexed directory (no dot or dot dot * entries). This allows us to double check for existing * entries which might not have been found in the index. */ if (name_len == 1 && !strncmp(".", name, 1) && pos == 0) { p->seen_dot = 1; return true; } if (name_len == 2 && !strncmp("..", name, 2) && pos == OCFS2_DIR_REC_LEN(1)) { p->seen_dot_dot = 1; if (p->dx_dir && p->seen_dot) return false; return true; } p->seen_other = 1; return false; } static int ocfs2_empty_dir_dx(struct inode *inode, struct ocfs2_empty_dir_priv *priv) { int ret; struct buffer_head *di_bh = NULL; struct buffer_head *dx_root_bh = NULL; struct ocfs2_dinode *di; struct ocfs2_dx_root_block *dx_root; priv->dx_dir = 1; ret = ocfs2_read_inode_block(inode, &di_bh); if (ret) { mlog_errno(ret); goto out; } di = (struct ocfs2_dinode *)di_bh->b_data; ret = ocfs2_read_dx_root(inode, di, &dx_root_bh); if (ret) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; if (le32_to_cpu(dx_root->dr_num_entries) != 2) priv->seen_other = 1; out: brelse(di_bh); brelse(dx_root_bh); return ret; } /* * routine to check that the specified directory is empty (for rmdir) * * Returns 1 if dir is empty, zero otherwise. * * XXX: This is a performance problem for unindexed directories. */ int ocfs2_empty_dir(struct inode *inode) { int ret; struct ocfs2_empty_dir_priv priv = { .ctx.actor = ocfs2_empty_dir_filldir, }; if (ocfs2_dir_indexed(inode)) { ret = ocfs2_empty_dir_dx(inode, &priv); if (ret) mlog_errno(ret); /* * We still run ocfs2_dir_foreach to get the checks * for "." and "..". */ } ret = ocfs2_dir_foreach(inode, &priv.ctx); if (ret) mlog_errno(ret); if (!priv.seen_dot || !priv.seen_dot_dot) { mlog(ML_ERROR, "bad directory (dir #%llu) - no `.' or `..'\n", (unsigned long long)OCFS2_I(inode)->ip_blkno); /* * XXX: Is it really safe to allow an unlink to continue? */ return 1; } return !priv.seen_other; } /* * Fills "." and ".." dirents in a new directory block. Returns dirent for * "..", which might be used during creation of a directory with a trailing * header. It is otherwise safe to ignore the return code. */ static struct ocfs2_dir_entry *ocfs2_fill_initial_dirents(struct inode *inode, struct inode *parent, char *start, unsigned int size) { struct ocfs2_dir_entry *de = (struct ocfs2_dir_entry *)start; de->inode = cpu_to_le64(OCFS2_I(inode)->ip_blkno); de->name_len = 1; de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len)); strcpy(de->name, "."); ocfs2_set_de_type(de, S_IFDIR); de = (struct ocfs2_dir_entry *) ((char *)de + le16_to_cpu(de->rec_len)); de->inode = cpu_to_le64(OCFS2_I(parent)->ip_blkno); de->rec_len = cpu_to_le16(size - OCFS2_DIR_REC_LEN(1)); de->name_len = 2; strcpy(de->name, ".."); ocfs2_set_de_type(de, S_IFDIR); return de; } /* * This works together with code in ocfs2_mknod_locked() which sets * the inline-data flag and initializes the inline-data section. */ static int ocfs2_fill_new_dir_id(struct ocfs2_super *osb, handle_t *handle, struct inode *parent, struct inode *inode, struct buffer_head *di_bh) { int ret; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; struct ocfs2_inline_data *data = &di->id2.i_data; unsigned int size = le16_to_cpu(data->id_count); ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out; } ocfs2_fill_initial_dirents(inode, parent, data->id_data, size); ocfs2_journal_dirty(handle, di_bh); i_size_write(inode, size); set_nlink(inode, 2); inode->i_blocks = ocfs2_inode_sector_count(inode); ret = ocfs2_mark_inode_dirty(handle, inode, di_bh); if (ret < 0) mlog_errno(ret); out: return ret; } static int ocfs2_fill_new_dir_el(struct ocfs2_super *osb, handle_t *handle, struct inode *parent, struct inode *inode, struct buffer_head *fe_bh, struct ocfs2_alloc_context *data_ac, struct buffer_head **ret_new_bh) { int status; unsigned int size = osb->sb->s_blocksize; struct buffer_head *new_bh = NULL; struct ocfs2_dir_entry *de; if (ocfs2_new_dir_wants_trailer(inode)) size = ocfs2_dir_trailer_blk_off(parent->i_sb); status = ocfs2_do_extend_dir(osb->sb, handle, inode, fe_bh, data_ac, NULL, &new_bh); if (status < 0) { mlog_errno(status); goto bail; } ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); status = ocfs2_journal_access_db(handle, INODE_CACHE(inode), new_bh, OCFS2_JOURNAL_ACCESS_CREATE); if (status < 0) { mlog_errno(status); goto bail; } memset(new_bh->b_data, 0, osb->sb->s_blocksize); de = ocfs2_fill_initial_dirents(inode, parent, new_bh->b_data, size); if (ocfs2_new_dir_wants_trailer(inode)) { int size = le16_to_cpu(de->rec_len); /* * Figure out the size of the hole left over after * insertion of '.' and '..'. The trailer wants this * information. */ size -= OCFS2_DIR_REC_LEN(2); size -= sizeof(struct ocfs2_dir_block_trailer); ocfs2_init_dir_trailer(inode, new_bh, size); } ocfs2_journal_dirty(handle, new_bh); i_size_write(inode, inode->i_sb->s_blocksize); set_nlink(inode, 2); inode->i_blocks = ocfs2_inode_sector_count(inode); status = ocfs2_mark_inode_dirty(handle, inode, fe_bh); if (status < 0) { mlog_errno(status); goto bail; } status = 0; if (ret_new_bh) { *ret_new_bh = new_bh; new_bh = NULL; } bail: brelse(new_bh); return status; } static int ocfs2_dx_dir_attach_index(struct ocfs2_super *osb, handle_t *handle, struct inode *dir, struct buffer_head *di_bh, struct buffer_head *dirdata_bh, struct ocfs2_alloc_context *meta_ac, int dx_inline, u32 num_entries, struct buffer_head **ret_dx_root_bh) { int ret; struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data; u16 dr_suballoc_bit; u64 suballoc_loc, dr_blkno; unsigned int num_bits; struct buffer_head *dx_root_bh = NULL; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dir_block_trailer *trailer = ocfs2_trailer_from_bh(dirdata_bh, dir->i_sb); ret = ocfs2_claim_metadata(handle, meta_ac, 1, &suballoc_loc, &dr_suballoc_bit, &num_bits, &dr_blkno); if (ret) { mlog_errno(ret); goto out; } trace_ocfs2_dx_dir_attach_index( (unsigned long long)OCFS2_I(dir)->ip_blkno, (unsigned long long)dr_blkno); dx_root_bh = sb_getblk(osb->sb, dr_blkno); if (dx_root_bh == NULL) { ret = -ENOMEM; goto out; } ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), dx_root_bh); ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh, OCFS2_JOURNAL_ACCESS_CREATE); if (ret < 0) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; memset(dx_root, 0, osb->sb->s_blocksize); strcpy(dx_root->dr_signature, OCFS2_DX_ROOT_SIGNATURE); dx_root->dr_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot); dx_root->dr_suballoc_loc = cpu_to_le64(suballoc_loc); dx_root->dr_suballoc_bit = cpu_to_le16(dr_suballoc_bit); dx_root->dr_fs_generation = cpu_to_le32(osb->fs_generation); dx_root->dr_blkno = cpu_to_le64(dr_blkno); dx_root->dr_dir_blkno = cpu_to_le64(OCFS2_I(dir)->ip_blkno); dx_root->dr_num_entries = cpu_to_le32(num_entries); if (le16_to_cpu(trailer->db_free_rec_len)) dx_root->dr_free_blk = cpu_to_le64(dirdata_bh->b_blocknr); else dx_root->dr_free_blk = cpu_to_le64(0); if (dx_inline) { dx_root->dr_flags |= OCFS2_DX_FLAG_INLINE; dx_root->dr_entries.de_count = cpu_to_le16(ocfs2_dx_entries_per_root(osb->sb)); } else { dx_root->dr_list.l_count = cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb)); } ocfs2_journal_dirty(handle, dx_root_bh); ret = ocfs2_journal_access_di(handle, INODE_CACHE(dir), di_bh, OCFS2_JOURNAL_ACCESS_CREATE); if (ret) { mlog_errno(ret); goto out; } di->i_dx_root = cpu_to_le64(dr_blkno); spin_lock(&OCFS2_I(dir)->ip_lock); OCFS2_I(dir)->ip_dyn_features |= OCFS2_INDEXED_DIR_FL; di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features); spin_unlock(&OCFS2_I(dir)->ip_lock); ocfs2_journal_dirty(handle, di_bh); *ret_dx_root_bh = dx_root_bh; dx_root_bh = NULL; out: brelse(dx_root_bh); return ret; } static int ocfs2_dx_dir_format_cluster(struct ocfs2_super *osb, handle_t *handle, struct inode *dir, struct buffer_head **dx_leaves, int num_dx_leaves, u64 start_blk) { int ret, i; struct ocfs2_dx_leaf *dx_leaf; struct buffer_head *bh; for (i = 0; i < num_dx_leaves; i++) { bh = sb_getblk(osb->sb, start_blk + i); if (bh == NULL) { ret = -ENOMEM; goto out; } dx_leaves[i] = bh; ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), bh); ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), bh, OCFS2_JOURNAL_ACCESS_CREATE); if (ret < 0) { mlog_errno(ret); goto out; } dx_leaf = (struct ocfs2_dx_leaf *) bh->b_data; memset(dx_leaf, 0, osb->sb->s_blocksize); strcpy(dx_leaf->dl_signature, OCFS2_DX_LEAF_SIGNATURE); dx_leaf->dl_fs_generation = cpu_to_le32(osb->fs_generation); dx_leaf->dl_blkno = cpu_to_le64(bh->b_blocknr); dx_leaf->dl_list.de_count = cpu_to_le16(ocfs2_dx_entries_per_leaf(osb->sb)); trace_ocfs2_dx_dir_format_cluster( (unsigned long long)OCFS2_I(dir)->ip_blkno, (unsigned long long)bh->b_blocknr, le16_to_cpu(dx_leaf->dl_list.de_count)); ocfs2_journal_dirty(handle, bh); } ret = 0; out: return ret; } /* * Allocates and formats a new cluster for use in an indexed dir * leaf. This version will not do the extent insert, so that it can be * used by operations which need careful ordering. */ static int __ocfs2_dx_dir_new_cluster(struct inode *dir, u32 cpos, handle_t *handle, struct ocfs2_alloc_context *data_ac, struct buffer_head **dx_leaves, int num_dx_leaves, u64 *ret_phys_blkno) { int ret; u32 phys, num; u64 phys_blkno; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); /* * XXX: For create, this should claim cluster for the index * *before* the unindexed insert so that we have a better * chance of contiguousness as the directory grows in number * of entries. */ ret = __ocfs2_claim_clusters(handle, data_ac, 1, 1, &phys, &num); if (ret) { mlog_errno(ret); goto out; } /* * Format the new cluster first. That way, we're inserting * valid data. */ phys_blkno = ocfs2_clusters_to_blocks(osb->sb, phys); ret = ocfs2_dx_dir_format_cluster(osb, handle, dir, dx_leaves, num_dx_leaves, phys_blkno); if (ret) { mlog_errno(ret); goto out; } *ret_phys_blkno = phys_blkno; out: return ret; } static int ocfs2_dx_dir_new_cluster(struct inode *dir, struct ocfs2_extent_tree *et, u32 cpos, handle_t *handle, struct ocfs2_alloc_context *data_ac, struct ocfs2_alloc_context *meta_ac, struct buffer_head **dx_leaves, int num_dx_leaves) { int ret; u64 phys_blkno; ret = __ocfs2_dx_dir_new_cluster(dir, cpos, handle, data_ac, dx_leaves, num_dx_leaves, &phys_blkno); if (ret) { mlog_errno(ret); goto out; } ret = ocfs2_insert_extent(handle, et, cpos, phys_blkno, 1, 0, meta_ac); if (ret) mlog_errno(ret); out: return ret; } static struct buffer_head **ocfs2_dx_dir_kmalloc_leaves(struct super_block *sb, int *ret_num_leaves) { int num_dx_leaves = ocfs2_clusters_to_blocks(sb, 1); struct buffer_head **dx_leaves; dx_leaves = kcalloc(num_dx_leaves, sizeof(struct buffer_head *), GFP_NOFS); if (dx_leaves && ret_num_leaves) *ret_num_leaves = num_dx_leaves; return dx_leaves; } static int ocfs2_fill_new_dir_dx(struct ocfs2_super *osb, handle_t *handle, struct inode *parent, struct inode *inode, struct buffer_head *di_bh, struct ocfs2_alloc_context *data_ac, struct ocfs2_alloc_context *meta_ac) { int ret; struct buffer_head *leaf_bh = NULL; struct buffer_head *dx_root_bh = NULL; struct ocfs2_dx_hinfo hinfo; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dx_entry_list *entry_list; /* * Our strategy is to create the directory as though it were * unindexed, then add the index block. This works with very * little complication since the state of a new directory is a * very well known quantity. * * Essentially, we have two dirents ("." and ".."), in the 1st * block which need indexing. These are easily inserted into * the index block. */ ret = ocfs2_fill_new_dir_el(osb, handle, parent, inode, di_bh, data_ac, &leaf_bh); if (ret) { mlog_errno(ret); goto out; } ret = ocfs2_dx_dir_attach_index(osb, handle, inode, di_bh, leaf_bh, meta_ac, 1, 2, &dx_root_bh); if (ret) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; entry_list = &dx_root->dr_entries; /* Buffer has been journaled for us by ocfs2_dx_dir_attach_index */ ocfs2_dx_dir_name_hash(inode, ".", 1, &hinfo); ocfs2_dx_entry_list_insert(entry_list, &hinfo, leaf_bh->b_blocknr); ocfs2_dx_dir_name_hash(inode, "..", 2, &hinfo); ocfs2_dx_entry_list_insert(entry_list, &hinfo, leaf_bh->b_blocknr); out: brelse(dx_root_bh); brelse(leaf_bh); return ret; } int ocfs2_fill_new_dir(struct ocfs2_super *osb, handle_t *handle, struct inode *parent, struct inode *inode, struct buffer_head *fe_bh, struct ocfs2_alloc_context *data_ac, struct ocfs2_alloc_context *meta_ac) { BUG_ON(!ocfs2_supports_inline_data(osb) && data_ac == NULL); if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) return ocfs2_fill_new_dir_id(osb, handle, parent, inode, fe_bh); if (ocfs2_supports_indexed_dirs(osb)) return ocfs2_fill_new_dir_dx(osb, handle, parent, inode, fe_bh, data_ac, meta_ac); return ocfs2_fill_new_dir_el(osb, handle, parent, inode, fe_bh, data_ac, NULL); } static int ocfs2_dx_dir_index_block(struct inode *dir, handle_t *handle, struct buffer_head **dx_leaves, int num_dx_leaves, u32 *num_dx_entries, struct buffer_head *dirent_bh) { int ret = 0, namelen, i; char *de_buf, *limit; struct ocfs2_dir_entry *de; struct buffer_head *dx_leaf_bh; struct ocfs2_dx_hinfo hinfo; u64 dirent_blk = dirent_bh->b_blocknr; de_buf = dirent_bh->b_data; limit = de_buf + dir->i_sb->s_blocksize; while (de_buf < limit) { de = (struct ocfs2_dir_entry *)de_buf; namelen = de->name_len; if (!namelen || !de->inode) goto inc; ocfs2_dx_dir_name_hash(dir, de->name, namelen, &hinfo); i = ocfs2_dx_dir_hash_idx(OCFS2_SB(dir->i_sb), &hinfo); dx_leaf_bh = dx_leaves[i]; ret = __ocfs2_dx_dir_leaf_insert(dir, handle, &hinfo, dirent_blk, dx_leaf_bh); if (ret) { mlog_errno(ret); goto out; } *num_dx_entries = *num_dx_entries + 1; inc: de_buf += le16_to_cpu(de->rec_len); } out: return ret; } /* * XXX: This expects dx_root_bh to already be part of the transaction. */ static void ocfs2_dx_dir_index_root_block(struct inode *dir, struct buffer_head *dx_root_bh, struct buffer_head *dirent_bh) { char *de_buf, *limit; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dir_entry *de; struct ocfs2_dx_hinfo hinfo; u64 dirent_blk = dirent_bh->b_blocknr; dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; de_buf = dirent_bh->b_data; limit = de_buf + dir->i_sb->s_blocksize; while (de_buf < limit) { de = (struct ocfs2_dir_entry *)de_buf; if (!de->name_len || !de->inode) goto inc; ocfs2_dx_dir_name_hash(dir, de->name, de->name_len, &hinfo); trace_ocfs2_dx_dir_index_root_block( (unsigned long long)dir->i_ino, hinfo.major_hash, hinfo.minor_hash, de->name_len, de->name, le16_to_cpu(dx_root->dr_entries.de_num_used)); ocfs2_dx_entry_list_insert(&dx_root->dr_entries, &hinfo, dirent_blk); le32_add_cpu(&dx_root->dr_num_entries, 1); inc: de_buf += le16_to_cpu(de->rec_len); } } /* * Count the number of inline directory entries in di_bh and compare * them against the number of entries we can hold in an inline dx root * block. */ static int ocfs2_new_dx_should_be_inline(struct inode *dir, struct buffer_head *di_bh) { int dirent_count = 0; char *de_buf, *limit; struct ocfs2_dir_entry *de; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; de_buf = di->id2.i_data.id_data; limit = de_buf + i_size_read(dir); while (de_buf < limit) { de = (struct ocfs2_dir_entry *)de_buf; if (de->name_len && de->inode) dirent_count++; de_buf += le16_to_cpu(de->rec_len); } /* We are careful to leave room for one extra record. */ return dirent_count < ocfs2_dx_entries_per_root(dir->i_sb); } /* * Expand rec_len of the rightmost dirent in a directory block so that it * contains the end of our valid space for dirents. We do this during * expansion from an inline directory to one with extents. The first dir block * in that case is taken from the inline data portion of the inode block. * * This will also return the largest amount of contiguous space for a dirent * in the block. That value is *not* necessarily the last dirent, even after * expansion. The directory indexing code wants this value for free space * accounting. We do this here since we're already walking the entire dir * block. * * We add the dir trailer if this filesystem wants it. */ static unsigned int ocfs2_expand_last_dirent(char *start, unsigned int old_size, struct inode *dir) { struct super_block *sb = dir->i_sb; struct ocfs2_dir_entry *de; struct ocfs2_dir_entry *prev_de; char *de_buf, *limit; unsigned int new_size = sb->s_blocksize; unsigned int bytes, this_hole; unsigned int largest_hole = 0; if (ocfs2_new_dir_wants_trailer(dir)) new_size = ocfs2_dir_trailer_blk_off(sb); bytes = new_size - old_size; limit = start + old_size; de_buf = start; de = (struct ocfs2_dir_entry *)de_buf; do { this_hole = ocfs2_figure_dirent_hole(de); if (this_hole > largest_hole) largest_hole = this_hole; prev_de = de; de_buf += le16_to_cpu(de->rec_len); de = (struct ocfs2_dir_entry *)de_buf; } while (de_buf < limit); le16_add_cpu(&prev_de->rec_len, bytes); /* We need to double check this after modification of the final * dirent. */ this_hole = ocfs2_figure_dirent_hole(prev_de); if (this_hole > largest_hole) largest_hole = this_hole; if (largest_hole >= OCFS2_DIR_MIN_REC_LEN) return largest_hole; return 0; } /* * We allocate enough clusters to fulfill "blocks_wanted", but set * i_size to exactly one block. Ocfs2_extend_dir() will handle the * rest automatically for us. * * *first_block_bh is a pointer to the 1st data block allocated to the * directory. */ static int ocfs2_expand_inline_dir(struct inode *dir, struct buffer_head *di_bh, unsigned int blocks_wanted, struct ocfs2_dir_lookup_result *lookup, struct buffer_head **first_block_bh) { u32 alloc, dx_alloc, bit_off, len, num_dx_entries = 0; struct super_block *sb = dir->i_sb; int ret, i, num_dx_leaves = 0, dx_inline = 0, credits = ocfs2_inline_to_extents_credits(sb); u64 dx_insert_blkno, blkno, bytes = blocks_wanted << sb->s_blocksize_bits; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); struct ocfs2_inode_info *oi = OCFS2_I(dir); struct ocfs2_alloc_context *data_ac = NULL; struct ocfs2_alloc_context *meta_ac = NULL; struct buffer_head *dirdata_bh = NULL; struct buffer_head *dx_root_bh = NULL; struct buffer_head **dx_leaves = NULL; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; handle_t *handle; struct ocfs2_extent_tree et; struct ocfs2_extent_tree dx_et; int did_quota = 0, bytes_allocated = 0; ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(dir), di_bh); alloc = ocfs2_clusters_for_bytes(sb, bytes); dx_alloc = 0; down_write(&oi->ip_alloc_sem); if (ocfs2_supports_indexed_dirs(osb)) { credits += ocfs2_add_dir_index_credits(sb); dx_inline = ocfs2_new_dx_should_be_inline(dir, di_bh); if (!dx_inline) { /* Add one more cluster for an index leaf */ dx_alloc++; dx_leaves = ocfs2_dx_dir_kmalloc_leaves(sb, &num_dx_leaves); if (!dx_leaves) { ret = -ENOMEM; mlog_errno(ret); goto out; } } /* This gets us the dx_root */ ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); if (ret) { mlog_errno(ret); goto out; } } /* * We should never need more than 2 clusters for the unindexed * tree - maximum dirent size is far less than one block. In * fact, the only time we'd need more than one cluster is if * blocksize == clustersize and the dirent won't fit in the * extra space that the expansion to a single block gives. As * of today, that only happens on 4k/4k file systems. */ BUG_ON(alloc > 2); ret = ocfs2_reserve_clusters(osb, alloc + dx_alloc, &data_ac); if (ret) { mlog_errno(ret); goto out; } /* * Prepare for worst case allocation scenario of two separate * extents in the unindexed tree. */ if (alloc == 2) credits += OCFS2_SUBALLOC_ALLOC; handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); mlog_errno(ret); goto out; } ret = dquot_alloc_space_nodirty(dir, ocfs2_clusters_to_bytes(osb->sb, alloc + dx_alloc)); if (ret) goto out_commit; did_quota = 1; if (ocfs2_supports_indexed_dirs(osb) && !dx_inline) { /* * Allocate our index cluster first, to maximize the * possibility that unindexed leaves grow * contiguously. */ ret = __ocfs2_dx_dir_new_cluster(dir, 0, handle, data_ac, dx_leaves, num_dx_leaves, &dx_insert_blkno); if (ret) { mlog_errno(ret); goto out_commit; } bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1); } /* * Try to claim as many clusters as the bitmap can give though * if we only get one now, that's enough to continue. The rest * will be claimed after the conversion to extents. */ if (ocfs2_dir_resv_allowed(osb)) data_ac->ac_resv = &oi->ip_la_data_resv; ret = ocfs2_claim_clusters(handle, data_ac, 1, &bit_off, &len); if (ret) { mlog_errno(ret); goto out_commit; } bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1); /* * Operations are carefully ordered so that we set up the new * data block first. The conversion from inline data to * extents follows. */ blkno = ocfs2_clusters_to_blocks(dir->i_sb, bit_off); dirdata_bh = sb_getblk(sb, blkno); if (!dirdata_bh) { ret = -ENOMEM; mlog_errno(ret); goto out_commit; } ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), dirdata_bh); ret = ocfs2_journal_access_db(handle, INODE_CACHE(dir), dirdata_bh, OCFS2_JOURNAL_ACCESS_CREATE); if (ret) { mlog_errno(ret); goto out_commit; } memcpy(dirdata_bh->b_data, di->id2.i_data.id_data, i_size_read(dir)); memset(dirdata_bh->b_data + i_size_read(dir), 0, sb->s_blocksize - i_size_read(dir)); i = ocfs2_expand_last_dirent(dirdata_bh->b_data, i_size_read(dir), dir); if (ocfs2_new_dir_wants_trailer(dir)) { /* * Prepare the dir trailer up front. It will otherwise look * like a valid dirent. Even if inserting the index fails * (unlikely), then all we'll have done is given first dir * block a small amount of fragmentation. */ ocfs2_init_dir_trailer(dir, dirdata_bh, i); } ocfs2_update_inode_fsync_trans(handle, dir, 1); ocfs2_journal_dirty(handle, dirdata_bh); if (ocfs2_supports_indexed_dirs(osb) && !dx_inline) { /* * Dx dirs with an external cluster need to do this up * front. Inline dx root's get handled later, after * we've allocated our root block. We get passed back * a total number of items so that dr_num_entries can * be correctly set once the dx_root has been * allocated. */ ret = ocfs2_dx_dir_index_block(dir, handle, dx_leaves, num_dx_leaves, &num_dx_entries, dirdata_bh); if (ret) { mlog_errno(ret); goto out_commit; } } /* * Set extent, i_size, etc on the directory. After this, the * inode should contain the same exact dirents as before and * be fully accessible from system calls. * * We let the later dirent insert modify c/mtime - to the user * the data hasn't changed. */ ret = ocfs2_journal_access_di(handle, INODE_CACHE(dir), di_bh, OCFS2_JOURNAL_ACCESS_CREATE); if (ret) { mlog_errno(ret); goto out_commit; } spin_lock(&oi->ip_lock); oi->ip_dyn_features &= ~OCFS2_INLINE_DATA_FL; di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); spin_unlock(&oi->ip_lock); ocfs2_dinode_new_extent_list(dir, di); i_size_write(dir, sb->s_blocksize); inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); di->i_size = cpu_to_le64(sb->s_blocksize); di->i_ctime = di->i_mtime = cpu_to_le64(inode_get_ctime_sec(dir)); di->i_ctime_nsec = di->i_mtime_nsec = cpu_to_le32(inode_get_ctime_nsec(dir)); ocfs2_update_inode_fsync_trans(handle, dir, 1); /* * This should never fail as our extent list is empty and all * related blocks have been journaled already. */ ret = ocfs2_insert_extent(handle, &et, 0, blkno, len, 0, NULL); if (ret) { mlog_errno(ret); goto out_commit; } /* * Set i_blocks after the extent insert for the most up to * date ip_clusters value. */ dir->i_blocks = ocfs2_inode_sector_count(dir); ocfs2_journal_dirty(handle, di_bh); if (ocfs2_supports_indexed_dirs(osb)) { ret = ocfs2_dx_dir_attach_index(osb, handle, dir, di_bh, dirdata_bh, meta_ac, dx_inline, num_dx_entries, &dx_root_bh); if (ret) { mlog_errno(ret); goto out_commit; } if (dx_inline) { ocfs2_dx_dir_index_root_block(dir, dx_root_bh, dirdata_bh); } else { ocfs2_init_dx_root_extent_tree(&dx_et, INODE_CACHE(dir), dx_root_bh); ret = ocfs2_insert_extent(handle, &dx_et, 0, dx_insert_blkno, 1, 0, NULL); if (ret) mlog_errno(ret); } } /* * We asked for two clusters, but only got one in the 1st * pass. Claim the 2nd cluster as a separate extent. */ if (alloc > len) { ret = ocfs2_claim_clusters(handle, data_ac, 1, &bit_off, &len); if (ret) { mlog_errno(ret); goto out_commit; } blkno = ocfs2_clusters_to_blocks(dir->i_sb, bit_off); ret = ocfs2_insert_extent(handle, &et, 1, blkno, len, 0, NULL); if (ret) { mlog_errno(ret); goto out_commit; } bytes_allocated += ocfs2_clusters_to_bytes(dir->i_sb, 1); } *first_block_bh = dirdata_bh; dirdata_bh = NULL; if (ocfs2_supports_indexed_dirs(osb)) { unsigned int off; if (!dx_inline) { /* * We need to return the correct block within the * cluster which should hold our entry. */ off = ocfs2_dx_dir_hash_idx(osb, &lookup->dl_hinfo); get_bh(dx_leaves[off]); lookup->dl_dx_leaf_bh = dx_leaves[off]; } lookup->dl_dx_root_bh = dx_root_bh; dx_root_bh = NULL; } out_commit: if (ret < 0 && did_quota) dquot_free_space_nodirty(dir, bytes_allocated); ocfs2_commit_trans(osb, handle); out: up_write(&oi->ip_alloc_sem); if (data_ac) ocfs2_free_alloc_context(data_ac); if (meta_ac) ocfs2_free_alloc_context(meta_ac); if (dx_leaves) { for (i = 0; i < num_dx_leaves; i++) brelse(dx_leaves[i]); kfree(dx_leaves); } brelse(dirdata_bh); brelse(dx_root_bh); return ret; } /* returns a bh of the 1st new block in the allocation. */ static int ocfs2_do_extend_dir(struct super_block *sb, handle_t *handle, struct inode *dir, struct buffer_head *parent_fe_bh, struct ocfs2_alloc_context *data_ac, struct ocfs2_alloc_context *meta_ac, struct buffer_head **new_bh) { int status; int extend, did_quota = 0; u64 p_blkno, v_blkno; spin_lock(&OCFS2_I(dir)->ip_lock); extend = (i_size_read(dir) == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)); spin_unlock(&OCFS2_I(dir)->ip_lock); if (extend) { u32 offset = OCFS2_I(dir)->ip_clusters; status = dquot_alloc_space_nodirty(dir, ocfs2_clusters_to_bytes(sb, 1)); if (status) goto bail; did_quota = 1; status = ocfs2_add_inode_data(OCFS2_SB(sb), dir, &offset, 1, 0, parent_fe_bh, handle, data_ac, meta_ac, NULL); BUG_ON(status == -EAGAIN); if (status < 0) { mlog_errno(status); goto bail; } } v_blkno = ocfs2_blocks_for_bytes(sb, i_size_read(dir)); status = ocfs2_extent_map_get_blocks(dir, v_blkno, &p_blkno, NULL, NULL); if (status < 0) { mlog_errno(status); goto bail; } *new_bh = sb_getblk(sb, p_blkno); if (!*new_bh) { status = -ENOMEM; mlog_errno(status); goto bail; } status = 0; bail: if (did_quota && status < 0) dquot_free_space_nodirty(dir, ocfs2_clusters_to_bytes(sb, 1)); return status; } /* * Assumes you already have a cluster lock on the directory. * * 'blocks_wanted' is only used if we have an inline directory which * is to be turned into an extent based one. The size of the dirent to * insert might be larger than the space gained by growing to just one * block, so we may have to grow the inode by two blocks in that case. * * If the directory is already indexed, dx_root_bh must be provided. */ static int ocfs2_extend_dir(struct ocfs2_super *osb, struct inode *dir, struct buffer_head *parent_fe_bh, unsigned int blocks_wanted, struct ocfs2_dir_lookup_result *lookup, struct buffer_head **new_de_bh) { int status = 0; int credits, num_free_extents, drop_alloc_sem = 0; loff_t dir_i_size; struct ocfs2_dinode *fe = (struct ocfs2_dinode *) parent_fe_bh->b_data; struct ocfs2_extent_list *el = &fe->id2.i_list; struct ocfs2_alloc_context *data_ac = NULL; struct ocfs2_alloc_context *meta_ac = NULL; handle_t *handle = NULL; struct buffer_head *new_bh = NULL; struct ocfs2_dir_entry * de; struct super_block *sb = osb->sb; struct ocfs2_extent_tree et; struct buffer_head *dx_root_bh = lookup->dl_dx_root_bh; if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { /* * This would be a code error as an inline directory should * never have an index root. */ BUG_ON(dx_root_bh); status = ocfs2_expand_inline_dir(dir, parent_fe_bh, blocks_wanted, lookup, &new_bh); if (status) { mlog_errno(status); goto bail; } /* Expansion from inline to an indexed directory will * have given us this. */ dx_root_bh = lookup->dl_dx_root_bh; if (blocks_wanted == 1) { /* * If the new dirent will fit inside the space * created by pushing out to one block, then * we can complete the operation * here. Otherwise we have to expand i_size * and format the 2nd block below. */ BUG_ON(new_bh == NULL); goto bail_bh; } /* * Get rid of 'new_bh' - we want to format the 2nd * data block and return that instead. */ brelse(new_bh); new_bh = NULL; down_write(&OCFS2_I(dir)->ip_alloc_sem); drop_alloc_sem = 1; dir_i_size = i_size_read(dir); credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS; goto do_extend; } down_write(&OCFS2_I(dir)->ip_alloc_sem); drop_alloc_sem = 1; dir_i_size = i_size_read(dir); trace_ocfs2_extend_dir((unsigned long long)OCFS2_I(dir)->ip_blkno, dir_i_size); /* dir->i_size is always block aligned. */ spin_lock(&OCFS2_I(dir)->ip_lock); if (dir_i_size == ocfs2_clusters_to_bytes(sb, OCFS2_I(dir)->ip_clusters)) { spin_unlock(&OCFS2_I(dir)->ip_lock); ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(dir), parent_fe_bh); num_free_extents = ocfs2_num_free_extents(&et); if (num_free_extents < 0) { status = num_free_extents; mlog_errno(status); goto bail; } if (!num_free_extents) { status = ocfs2_reserve_new_metadata(osb, el, &meta_ac); if (status < 0) { if (status != -ENOSPC) mlog_errno(status); goto bail; } } status = ocfs2_reserve_clusters(osb, 1, &data_ac); if (status < 0) { if (status != -ENOSPC) mlog_errno(status); goto bail; } if (ocfs2_dir_resv_allowed(osb)) data_ac->ac_resv = &OCFS2_I(dir)->ip_la_data_resv; credits = ocfs2_calc_extend_credits(sb, el); } else { spin_unlock(&OCFS2_I(dir)->ip_lock); credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS; } do_extend: if (ocfs2_dir_indexed(dir)) credits++; /* For attaching the new dirent block to the * dx_root */ handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { status = PTR_ERR(handle); handle = NULL; mlog_errno(status); goto bail; } status = ocfs2_do_extend_dir(osb->sb, handle, dir, parent_fe_bh, data_ac, meta_ac, &new_bh); if (status < 0) { mlog_errno(status); goto bail; } ocfs2_set_new_buffer_uptodate(INODE_CACHE(dir), new_bh); status = ocfs2_journal_access_db(handle, INODE_CACHE(dir), new_bh, OCFS2_JOURNAL_ACCESS_CREATE); if (status < 0) { mlog_errno(status); goto bail; } memset(new_bh->b_data, 0, sb->s_blocksize); de = (struct ocfs2_dir_entry *) new_bh->b_data; de->inode = 0; if (ocfs2_supports_dir_trailer(dir)) { de->rec_len = cpu_to_le16(ocfs2_dir_trailer_blk_off(sb)); ocfs2_init_dir_trailer(dir, new_bh, le16_to_cpu(de->rec_len)); if (ocfs2_dir_indexed(dir)) { status = ocfs2_dx_dir_link_trailer(dir, handle, dx_root_bh, new_bh); if (status) { mlog_errno(status); goto bail; } } } else { de->rec_len = cpu_to_le16(sb->s_blocksize); } ocfs2_update_inode_fsync_trans(handle, dir, 1); ocfs2_journal_dirty(handle, new_bh); dir_i_size += dir->i_sb->s_blocksize; i_size_write(dir, dir_i_size); dir->i_blocks = ocfs2_inode_sector_count(dir); status = ocfs2_mark_inode_dirty(handle, dir, parent_fe_bh); if (status < 0) { mlog_errno(status); goto bail; } bail_bh: *new_de_bh = new_bh; get_bh(*new_de_bh); bail: if (handle) ocfs2_commit_trans(osb, handle); if (drop_alloc_sem) up_write(&OCFS2_I(dir)->ip_alloc_sem); if (data_ac) ocfs2_free_alloc_context(data_ac); if (meta_ac) ocfs2_free_alloc_context(meta_ac); brelse(new_bh); return status; } static int ocfs2_find_dir_space_id(struct inode *dir, struct buffer_head *di_bh, const char *name, int namelen, struct buffer_head **ret_de_bh, unsigned int *blocks_wanted) { int ret; struct super_block *sb = dir->i_sb; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; struct ocfs2_dir_entry *de, *last_de = NULL; char *first_de, *de_buf, *limit; unsigned long offset = 0; unsigned int rec_len, new_rec_len, free_space; /* * This calculates how many free bytes we'd have in block zero, should * this function force expansion to an extent tree. */ if (ocfs2_new_dir_wants_trailer(dir)) free_space = ocfs2_dir_trailer_blk_off(sb) - i_size_read(dir); else free_space = dir->i_sb->s_blocksize - i_size_read(dir); first_de = di->id2.i_data.id_data; de_buf = first_de; limit = de_buf + i_size_read(dir); rec_len = OCFS2_DIR_REC_LEN(namelen); while (de_buf < limit) { de = (struct ocfs2_dir_entry *)de_buf; if (!ocfs2_check_dir_entry(dir, de, di_bh, first_de, i_size_read(dir), offset)) { ret = -ENOENT; goto out; } if (ocfs2_match(namelen, name, de)) { ret = -EEXIST; goto out; } /* * No need to check for a trailing dirent record here as * they're not used for inline dirs. */ if (ocfs2_dirent_would_fit(de, rec_len)) { /* Ok, we found a spot. Return this bh and let * the caller actually fill it in. */ *ret_de_bh = di_bh; get_bh(*ret_de_bh); ret = 0; goto out; } last_de = de; de_buf += le16_to_cpu(de->rec_len); offset += le16_to_cpu(de->rec_len); } /* * We're going to require expansion of the directory - figure * out how many blocks we'll need so that a place for the * dirent can be found. */ *blocks_wanted = 1; new_rec_len = le16_to_cpu(last_de->rec_len) + free_space; if (new_rec_len < (rec_len + OCFS2_DIR_REC_LEN(last_de->name_len))) *blocks_wanted = 2; ret = -ENOSPC; out: return ret; } static int ocfs2_find_dir_space_el(struct inode *dir, const char *name, int namelen, struct buffer_head **ret_de_bh) { unsigned long offset; struct buffer_head *bh = NULL; unsigned short rec_len; struct ocfs2_dir_entry *de; struct super_block *sb = dir->i_sb; int status; int blocksize = dir->i_sb->s_blocksize; status = ocfs2_read_dir_block(dir, 0, &bh, 0); if (status) goto bail; rec_len = OCFS2_DIR_REC_LEN(namelen); offset = 0; de = (struct ocfs2_dir_entry *) bh->b_data; while (1) { if ((char *)de >= sb->s_blocksize + bh->b_data) { brelse(bh); bh = NULL; if (i_size_read(dir) <= offset) { /* * Caller will have to expand this * directory. */ status = -ENOSPC; goto bail; } status = ocfs2_read_dir_block(dir, offset >> sb->s_blocksize_bits, &bh, 0); if (status) goto bail; /* move to next block */ de = (struct ocfs2_dir_entry *) bh->b_data; } if (!ocfs2_check_dir_entry(dir, de, bh, bh->b_data, blocksize, offset)) { status = -ENOENT; goto bail; } if (ocfs2_match(namelen, name, de)) { status = -EEXIST; goto bail; } if (ocfs2_skip_dir_trailer(dir, de, offset % blocksize, blocksize)) goto next; if (ocfs2_dirent_would_fit(de, rec_len)) { /* Ok, we found a spot. Return this bh and let * the caller actually fill it in. */ *ret_de_bh = bh; get_bh(*ret_de_bh); status = 0; goto bail; } next: offset += le16_to_cpu(de->rec_len); de = (struct ocfs2_dir_entry *)((char *) de + le16_to_cpu(de->rec_len)); } bail: brelse(bh); if (status) mlog_errno(status); return status; } static int dx_leaf_sort_cmp(const void *a, const void *b) { const struct ocfs2_dx_entry *entry1 = a; const struct ocfs2_dx_entry *entry2 = b; u32 major_hash1 = le32_to_cpu(entry1->dx_major_hash); u32 major_hash2 = le32_to_cpu(entry2->dx_major_hash); u32 minor_hash1 = le32_to_cpu(entry1->dx_minor_hash); u32 minor_hash2 = le32_to_cpu(entry2->dx_minor_hash); if (major_hash1 > major_hash2) return 1; if (major_hash1 < major_hash2) return -1; /* * It is not strictly necessary to sort by minor */ if (minor_hash1 > minor_hash2) return 1; if (minor_hash1 < minor_hash2) return -1; return 0; } static int ocfs2_dx_leaf_same_major(struct ocfs2_dx_leaf *dx_leaf) { struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list; int i, num = le16_to_cpu(dl_list->de_num_used); for (i = 0; i < (num - 1); i++) { if (le32_to_cpu(dl_list->de_entries[i].dx_major_hash) != le32_to_cpu(dl_list->de_entries[i + 1].dx_major_hash)) return 0; } return 1; } /* * Find the optimal value to split this leaf on. This expects the leaf * entries to be in sorted order. * * leaf_cpos is the cpos of the leaf we're splitting. insert_hash is * the hash we want to insert. * * This function is only concerned with the major hash - that which * determines which cluster an item belongs to. */ static int ocfs2_dx_dir_find_leaf_split(struct ocfs2_dx_leaf *dx_leaf, u32 leaf_cpos, u32 insert_hash, u32 *split_hash) { struct ocfs2_dx_entry_list *dl_list = &dx_leaf->dl_list; int i, num_used = le16_to_cpu(dl_list->de_num_used); int allsame; /* * There's a couple rare, but nasty corner cases we have to * check for here. All of them involve a leaf where all value * have the same hash, which is what we look for first. * * Most of the time, all of the above is false, and we simply * pick the median value for a split. */ allsame = ocfs2_dx_leaf_same_major(dx_leaf); if (allsame) { u32 val = le32_to_cpu(dl_list->de_entries[0].dx_major_hash); if (val == insert_hash) { /* * No matter where we would choose to split, * the new entry would want to occupy the same * block as these. Since there's no space left * in their existing block, we know there * won't be space after the split. */ return -ENOSPC; } if (val == leaf_cpos) { /* * Because val is the same as leaf_cpos (which * is the smallest value this leaf can have), * yet is not equal to insert_hash, then we * know that insert_hash *must* be larger than * val (and leaf_cpos). At least cpos+1 in value. * * We also know then, that there cannot be an * adjacent extent (otherwise we'd be looking * at it). Choosing this value gives us a * chance to get some contiguousness. */ *split_hash = leaf_cpos + 1; return 0; } if (val > insert_hash) { /* * val can not be the same as insert hash, and * also must be larger than leaf_cpos. Also, * we know that there can't be a leaf between * cpos and val, otherwise the entries with * hash 'val' would be there. */ *split_hash = val; return 0; } *split_hash = insert_hash; return 0; } /* * Since the records are sorted and the checks above * guaranteed that not all records in this block are the same, * we simple travel forward, from the median, and pick the 1st * record whose value is larger than leaf_cpos. */ for (i = (num_used / 2); i < num_used; i++) if (le32_to_cpu(dl_list->de_entries[i].dx_major_hash) > leaf_cpos) break; BUG_ON(i == num_used); /* Should be impossible */ *split_hash = le32_to_cpu(dl_list->de_entries[i].dx_major_hash); return 0; } /* * Transfer all entries in orig_dx_leaves whose major hash is equal to or * larger than split_hash into new_dx_leaves. We use a temporary * buffer (tmp_dx_leaf) to make the changes to the original leaf blocks. * * Since the block offset inside a leaf (cluster) is a constant mask * of minor_hash, we can optimize - an item at block offset X within * the original cluster, will be at offset X within the new cluster. */ static void ocfs2_dx_dir_transfer_leaf(struct inode *dir, u32 split_hash, handle_t *handle, struct ocfs2_dx_leaf *tmp_dx_leaf, struct buffer_head **orig_dx_leaves, struct buffer_head **new_dx_leaves, int num_dx_leaves) { int i, j, num_used; u32 major_hash; struct ocfs2_dx_leaf *orig_dx_leaf, *new_dx_leaf; struct ocfs2_dx_entry_list *orig_list, *tmp_list; struct ocfs2_dx_entry *dx_entry; tmp_list = &tmp_dx_leaf->dl_list; for (i = 0; i < num_dx_leaves; i++) { orig_dx_leaf = (struct ocfs2_dx_leaf *) orig_dx_leaves[i]->b_data; orig_list = &orig_dx_leaf->dl_list; new_dx_leaf = (struct ocfs2_dx_leaf *) new_dx_leaves[i]->b_data; num_used = le16_to_cpu(orig_list->de_num_used); memcpy(tmp_dx_leaf, orig_dx_leaf, dir->i_sb->s_blocksize); tmp_list->de_num_used = cpu_to_le16(0); memset(&tmp_list->de_entries, 0, sizeof(*dx_entry)*num_used); for (j = 0; j < num_used; j++) { dx_entry = &orig_list->de_entries[j]; major_hash = le32_to_cpu(dx_entry->dx_major_hash); if (major_hash >= split_hash) ocfs2_dx_dir_leaf_insert_tail(new_dx_leaf, dx_entry); else ocfs2_dx_dir_leaf_insert_tail(tmp_dx_leaf, dx_entry); } memcpy(orig_dx_leaf, tmp_dx_leaf, dir->i_sb->s_blocksize); ocfs2_journal_dirty(handle, orig_dx_leaves[i]); ocfs2_journal_dirty(handle, new_dx_leaves[i]); } } static int ocfs2_dx_dir_rebalance_credits(struct ocfs2_super *osb, struct ocfs2_dx_root_block *dx_root) { int credits = ocfs2_clusters_to_blocks(osb->sb, 3); credits += ocfs2_calc_extend_credits(osb->sb, &dx_root->dr_list); credits += ocfs2_quota_trans_credits(osb->sb); return credits; } /* * Find the median value in dx_leaf_bh and allocate a new leaf to move * half our entries into. */ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir, struct buffer_head *dx_root_bh, struct buffer_head *dx_leaf_bh, struct ocfs2_dx_hinfo *hinfo, u32 leaf_cpos, u64 leaf_blkno) { struct ocfs2_dx_leaf *dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data; int credits, ret, i, num_used, did_quota = 0; u32 cpos, split_hash, insert_hash = hinfo->major_hash; u64 orig_leaves_start; int num_dx_leaves; struct buffer_head **orig_dx_leaves = NULL; struct buffer_head **new_dx_leaves = NULL; struct ocfs2_alloc_context *data_ac = NULL, *meta_ac = NULL; struct ocfs2_extent_tree et; handle_t *handle = NULL; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dx_leaf *tmp_dx_leaf = NULL; trace_ocfs2_dx_dir_rebalance((unsigned long long)OCFS2_I(dir)->ip_blkno, (unsigned long long)leaf_blkno, insert_hash); ocfs2_init_dx_root_extent_tree(&et, INODE_CACHE(dir), dx_root_bh); dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; /* * XXX: This is a rather large limit. We should use a more * realistic value. */ if (le32_to_cpu(dx_root->dr_clusters) == UINT_MAX) return -ENOSPC; num_used = le16_to_cpu(dx_leaf->dl_list.de_num_used); if (num_used < le16_to_cpu(dx_leaf->dl_list.de_count)) { mlog(ML_ERROR, "DX Dir: %llu, Asked to rebalance empty leaf: " "%llu, %d\n", (unsigned long long)OCFS2_I(dir)->ip_blkno, (unsigned long long)leaf_blkno, num_used); ret = -EIO; goto out; } orig_dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, &num_dx_leaves); if (!orig_dx_leaves) { ret = -ENOMEM; mlog_errno(ret); goto out; } new_dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, NULL); if (!new_dx_leaves) { ret = -ENOMEM; mlog_errno(ret); goto out; } ret = ocfs2_lock_allocators(dir, &et, 1, 0, &data_ac, &meta_ac); if (ret) { if (ret != -ENOSPC) mlog_errno(ret); goto out; } credits = ocfs2_dx_dir_rebalance_credits(osb, dx_root); handle = ocfs2_start_trans(osb, credits); if (IS_ERR(handle)) { ret = PTR_ERR(handle); handle = NULL; mlog_errno(ret); goto out; } ret = dquot_alloc_space_nodirty(dir, ocfs2_clusters_to_bytes(dir->i_sb, 1)); if (ret) goto out_commit; did_quota = 1; ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), dx_leaf_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out_commit; } /* * This block is changing anyway, so we can sort it in place. */ sort(dx_leaf->dl_list.de_entries, num_used, sizeof(struct ocfs2_dx_entry), dx_leaf_sort_cmp, NULL); ocfs2_journal_dirty(handle, dx_leaf_bh); ret = ocfs2_dx_dir_find_leaf_split(dx_leaf, leaf_cpos, insert_hash, &split_hash); if (ret) { mlog_errno(ret); goto out_commit; } trace_ocfs2_dx_dir_rebalance_split(leaf_cpos, split_hash, insert_hash); /* * We have to carefully order operations here. There are items * which want to be in the new cluster before insert, but in * order to put those items in the new cluster, we alter the * old cluster. A failure to insert gets nasty. * * So, start by reserving writes to the old * cluster. ocfs2_dx_dir_new_cluster will reserve writes on * the new cluster for us, before inserting it. The insert * won't happen if there's an error before that. Once the * insert is done then, we can transfer from one leaf into the * other without fear of hitting any error. */ /* * The leaf transfer wants some scratch space so that we don't * wind up doing a bunch of expensive memmove(). */ tmp_dx_leaf = kmalloc(osb->sb->s_blocksize, GFP_NOFS); if (!tmp_dx_leaf) { ret = -ENOMEM; mlog_errno(ret); goto out_commit; } orig_leaves_start = ocfs2_block_to_cluster_start(dir->i_sb, leaf_blkno); ret = ocfs2_read_dx_leaves(dir, orig_leaves_start, num_dx_leaves, orig_dx_leaves); if (ret) { mlog_errno(ret); goto out_commit; } cpos = split_hash; ret = ocfs2_dx_dir_new_cluster(dir, &et, cpos, handle, data_ac, meta_ac, new_dx_leaves, num_dx_leaves); if (ret) { mlog_errno(ret); goto out_commit; } for (i = 0; i < num_dx_leaves; i++) { ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), orig_dx_leaves[i], OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out_commit; } ret = ocfs2_journal_access_dl(handle, INODE_CACHE(dir), new_dx_leaves[i], OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out_commit; } } ocfs2_dx_dir_transfer_leaf(dir, split_hash, handle, tmp_dx_leaf, orig_dx_leaves, new_dx_leaves, num_dx_leaves); out_commit: if (ret < 0 && did_quota) dquot_free_space_nodirty(dir, ocfs2_clusters_to_bytes(dir->i_sb, 1)); ocfs2_update_inode_fsync_trans(handle, dir, 1); ocfs2_commit_trans(osb, handle); out: if (orig_dx_leaves || new_dx_leaves) { for (i = 0; i < num_dx_leaves; i++) { if (orig_dx_leaves) brelse(orig_dx_leaves[i]); if (new_dx_leaves) brelse(new_dx_leaves[i]); } kfree(orig_dx_leaves); kfree(new_dx_leaves); } if (meta_ac) ocfs2_free_alloc_context(meta_ac); if (data_ac) ocfs2_free_alloc_context(data_ac); kfree(tmp_dx_leaf); return ret; } static int ocfs2_find_dir_space_dx(struct ocfs2_super *osb, struct inode *dir, struct buffer_head *di_bh, struct buffer_head *dx_root_bh, const char *name, int namelen, struct ocfs2_dir_lookup_result *lookup) { int ret, rebalanced = 0; struct ocfs2_dx_root_block *dx_root; struct buffer_head *dx_leaf_bh = NULL; struct ocfs2_dx_leaf *dx_leaf; u64 blkno; u32 leaf_cpos; dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; restart_search: ret = ocfs2_dx_dir_lookup(dir, &dx_root->dr_list, &lookup->dl_hinfo, &leaf_cpos, &blkno); if (ret) { mlog_errno(ret); goto out; } ret = ocfs2_read_dx_leaf(dir, blkno, &dx_leaf_bh); if (ret) { mlog_errno(ret); goto out; } dx_leaf = (struct ocfs2_dx_leaf *)dx_leaf_bh->b_data; if (le16_to_cpu(dx_leaf->dl_list.de_num_used) >= le16_to_cpu(dx_leaf->dl_list.de_count)) { if (rebalanced) { /* * Rebalancing should have provided us with * space in an appropriate leaf. * * XXX: Is this an abnormal condition then? * Should we print a message here? */ ret = -ENOSPC; goto out; } ret = ocfs2_dx_dir_rebalance(osb, dir, dx_root_bh, dx_leaf_bh, &lookup->dl_hinfo, leaf_cpos, blkno); if (ret) { if (ret != -ENOSPC) mlog_errno(ret); goto out; } /* * Restart the lookup. The rebalance might have * changed which block our item fits into. Mark our * progress, so we only execute this once. */ brelse(dx_leaf_bh); dx_leaf_bh = NULL; rebalanced = 1; goto restart_search; } lookup->dl_dx_leaf_bh = dx_leaf_bh; dx_leaf_bh = NULL; out: brelse(dx_leaf_bh); return ret; } static int ocfs2_search_dx_free_list(struct inode *dir, struct buffer_head *dx_root_bh, int namelen, struct ocfs2_dir_lookup_result *lookup) { int ret = -ENOSPC; struct buffer_head *leaf_bh = NULL, *prev_leaf_bh = NULL; struct ocfs2_dir_block_trailer *db; u64 next_block; int rec_len = OCFS2_DIR_REC_LEN(namelen); struct ocfs2_dx_root_block *dx_root; dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; next_block = le64_to_cpu(dx_root->dr_free_blk); while (next_block) { brelse(prev_leaf_bh); prev_leaf_bh = leaf_bh; leaf_bh = NULL; ret = ocfs2_read_dir_block_direct(dir, next_block, &leaf_bh); if (ret) { mlog_errno(ret); goto out; } db = ocfs2_trailer_from_bh(leaf_bh, dir->i_sb); if (rec_len <= le16_to_cpu(db->db_free_rec_len)) { lookup->dl_leaf_bh = leaf_bh; lookup->dl_prev_leaf_bh = prev_leaf_bh; leaf_bh = NULL; prev_leaf_bh = NULL; break; } next_block = le64_to_cpu(db->db_free_next); } if (!next_block) ret = -ENOSPC; out: brelse(leaf_bh); brelse(prev_leaf_bh); return ret; } static int ocfs2_expand_inline_dx_root(struct inode *dir, struct buffer_head *dx_root_bh) { int ret, num_dx_leaves, i, j, did_quota = 0; struct buffer_head **dx_leaves = NULL; struct ocfs2_extent_tree et; u64 insert_blkno; struct ocfs2_alloc_context *data_ac = NULL; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); handle_t *handle = NULL; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dx_entry_list *entry_list; struct ocfs2_dx_entry *dx_entry; struct ocfs2_dx_leaf *target_leaf; ret = ocfs2_reserve_clusters(osb, 1, &data_ac); if (ret) { mlog_errno(ret); goto out; } dx_leaves = ocfs2_dx_dir_kmalloc_leaves(osb->sb, &num_dx_leaves); if (!dx_leaves) { ret = -ENOMEM; mlog_errno(ret); goto out; } handle = ocfs2_start_trans(osb, ocfs2_calc_dxi_expand_credits(osb->sb)); if (IS_ERR(handle)) { ret = PTR_ERR(handle); mlog_errno(ret); goto out; } ret = dquot_alloc_space_nodirty(dir, ocfs2_clusters_to_bytes(osb->sb, 1)); if (ret) goto out_commit; did_quota = 1; /* * We do this up front, before the allocation, so that a * failure to add the dx_root_bh to the journal won't result * us losing clusters. */ ret = ocfs2_journal_access_dr(handle, INODE_CACHE(dir), dx_root_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out_commit; } ret = __ocfs2_dx_dir_new_cluster(dir, 0, handle, data_ac, dx_leaves, num_dx_leaves, &insert_blkno); if (ret) { mlog_errno(ret); goto out_commit; } /* * Transfer the entries from our dx_root into the appropriate * block */ dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data; entry_list = &dx_root->dr_entries; for (i = 0; i < le16_to_cpu(entry_list->de_num_used); i++) { dx_entry = &entry_list->de_entries[i]; j = __ocfs2_dx_dir_hash_idx(osb, le32_to_cpu(dx_entry->dx_minor_hash)); target_leaf = (struct ocfs2_dx_leaf *)dx_leaves[j]->b_data; ocfs2_dx_dir_leaf_insert_tail(target_leaf, dx_entry); /* Each leaf has been passed to the journal already * via __ocfs2_dx_dir_new_cluster() */ } dx_root->dr_flags &= ~OCFS2_DX_FLAG_INLINE; memset(&dx_root->dr_list, 0, osb->sb->s_blocksize - offsetof(struct ocfs2_dx_root_block, dr_list)); dx_root->dr_list.l_count = cpu_to_le16(ocfs2_extent_recs_per_dx_root(osb->sb)); /* This should never fail considering we start with an empty * dx_root. */ ocfs2_init_dx_root_extent_tree(&et, INODE_CACHE(dir), dx_root_bh); ret = ocfs2_insert_extent(handle, &et, 0, insert_blkno, 1, 0, NULL); if (ret) mlog_errno(ret); did_quota = 0; ocfs2_update_inode_fsync_trans(handle, dir, 1); ocfs2_journal_dirty(handle, dx_root_bh); out_commit: if (ret < 0 && did_quota) dquot_free_space_nodirty(dir, ocfs2_clusters_to_bytes(dir->i_sb, 1)); ocfs2_commit_trans(osb, handle); out: if (data_ac) ocfs2_free_alloc_context(data_ac); if (dx_leaves) { for (i = 0; i < num_dx_leaves; i++) brelse(dx_leaves[i]); kfree(dx_leaves); } return ret; } static int ocfs2_inline_dx_has_space(struct buffer_head *dx_root_bh) { struct ocfs2_dx_root_block *dx_root; struct ocfs2_dx_entry_list *entry_list; dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data; entry_list = &dx_root->dr_entries; if (le16_to_cpu(entry_list->de_num_used) >= le16_to_cpu(entry_list->de_count)) return -ENOSPC; return 0; } static int ocfs2_prepare_dx_dir_for_insert(struct inode *dir, struct buffer_head *di_bh, const char *name, int namelen, struct ocfs2_dir_lookup_result *lookup) { int ret, free_dx_root = 1; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); struct buffer_head *dx_root_bh = NULL; struct buffer_head *leaf_bh = NULL; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; struct ocfs2_dx_root_block *dx_root; ret = ocfs2_read_dx_root(dir, di, &dx_root_bh); if (ret) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; if (le32_to_cpu(dx_root->dr_num_entries) == OCFS2_DX_ENTRIES_MAX) { ret = -ENOSPC; mlog_errno(ret); goto out; } if (ocfs2_dx_root_inline(dx_root)) { ret = ocfs2_inline_dx_has_space(dx_root_bh); if (ret == 0) goto search_el; /* * We ran out of room in the root block. Expand it to * an extent, then allow ocfs2_find_dir_space_dx to do * the rest. */ ret = ocfs2_expand_inline_dx_root(dir, dx_root_bh); if (ret) { mlog_errno(ret); goto out; } } /* * Insert preparation for an indexed directory is split into two * steps. The call to find_dir_space_dx reserves room in the index for * an additional item. If we run out of space there, it's a real error * we can't continue on. */ ret = ocfs2_find_dir_space_dx(osb, dir, di_bh, dx_root_bh, name, namelen, lookup); if (ret) { mlog_errno(ret); goto out; } search_el: /* * Next, we need to find space in the unindexed tree. This call * searches using the free space linked list. If the unindexed tree * lacks sufficient space, we'll expand it below. The expansion code * is smart enough to add any new blocks to the free space list. */ ret = ocfs2_search_dx_free_list(dir, dx_root_bh, namelen, lookup); if (ret && ret != -ENOSPC) { mlog_errno(ret); goto out; } /* Do this up here - ocfs2_extend_dir might need the dx_root */ lookup->dl_dx_root_bh = dx_root_bh; free_dx_root = 0; if (ret == -ENOSPC) { ret = ocfs2_extend_dir(osb, dir, di_bh, 1, lookup, &leaf_bh); if (ret) { mlog_errno(ret); goto out; } /* * We make the assumption here that new leaf blocks are added * to the front of our free list. */ lookup->dl_prev_leaf_bh = NULL; lookup->dl_leaf_bh = leaf_bh; } out: if (free_dx_root) brelse(dx_root_bh); return ret; } /* * Get a directory ready for insert. Any directory allocation required * happens here. Success returns zero, and enough context in the dir * lookup result that ocfs2_add_entry() will be able complete the task * with minimal performance impact. */ int ocfs2_prepare_dir_for_insert(struct ocfs2_super *osb, struct inode *dir, struct buffer_head *parent_fe_bh, const char *name, int namelen, struct ocfs2_dir_lookup_result *lookup) { int ret; unsigned int blocks_wanted = 1; struct buffer_head *bh = NULL; trace_ocfs2_prepare_dir_for_insert( (unsigned long long)OCFS2_I(dir)->ip_blkno, namelen); /* * Do this up front to reduce confusion. * * The directory might start inline, then be turned into an * indexed one, in which case we'd need to hash deep inside * ocfs2_find_dir_space_id(). Since * ocfs2_prepare_dx_dir_for_insert() also needs this hash * done, there seems no point in spreading out the calls. We * can optimize away the case where the file system doesn't * support indexing. */ if (ocfs2_supports_indexed_dirs(osb)) ocfs2_dx_dir_name_hash(dir, name, namelen, &lookup->dl_hinfo); if (ocfs2_dir_indexed(dir)) { ret = ocfs2_prepare_dx_dir_for_insert(dir, parent_fe_bh, name, namelen, lookup); if (ret) mlog_errno(ret); goto out; } if (OCFS2_I(dir)->ip_dyn_features & OCFS2_INLINE_DATA_FL) { ret = ocfs2_find_dir_space_id(dir, parent_fe_bh, name, namelen, &bh, &blocks_wanted); } else ret = ocfs2_find_dir_space_el(dir, name, namelen, &bh); if (ret && ret != -ENOSPC) { mlog_errno(ret); goto out; } if (ret == -ENOSPC) { /* * We have to expand the directory to add this name. */ BUG_ON(bh); ret = ocfs2_extend_dir(osb, dir, parent_fe_bh, blocks_wanted, lookup, &bh); if (ret) { if (ret != -ENOSPC) mlog_errno(ret); goto out; } BUG_ON(!bh); } lookup->dl_leaf_bh = bh; bh = NULL; out: brelse(bh); return ret; } static int ocfs2_dx_dir_remove_index(struct inode *dir, struct buffer_head *di_bh, struct buffer_head *dx_root_bh) { int ret; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; struct ocfs2_dx_root_block *dx_root; struct inode *dx_alloc_inode = NULL; struct buffer_head *dx_alloc_bh = NULL; handle_t *handle; u64 blk; u16 bit; u64 bg_blkno; dx_root = (struct ocfs2_dx_root_block *) dx_root_bh->b_data; dx_alloc_inode = ocfs2_get_system_file_inode(osb, EXTENT_ALLOC_SYSTEM_INODE, le16_to_cpu(dx_root->dr_suballoc_slot)); if (!dx_alloc_inode) { ret = -ENOMEM; mlog_errno(ret); goto out; } inode_lock(dx_alloc_inode); ret = ocfs2_inode_lock(dx_alloc_inode, &dx_alloc_bh, 1); if (ret) { mlog_errno(ret); goto out_mutex; } handle = ocfs2_start_trans(osb, OCFS2_DX_ROOT_REMOVE_CREDITS); if (IS_ERR(handle)) { ret = PTR_ERR(handle); mlog_errno(ret); goto out_unlock; } ret = ocfs2_journal_access_di(handle, INODE_CACHE(dir), di_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); goto out_commit; } spin_lock(&OCFS2_I(dir)->ip_lock); OCFS2_I(dir)->ip_dyn_features &= ~OCFS2_INDEXED_DIR_FL; di->i_dyn_features = cpu_to_le16(OCFS2_I(dir)->ip_dyn_features); spin_unlock(&OCFS2_I(dir)->ip_lock); di->i_dx_root = cpu_to_le64(0ULL); ocfs2_update_inode_fsync_trans(handle, dir, 1); ocfs2_journal_dirty(handle, di_bh); blk = le64_to_cpu(dx_root->dr_blkno); bit = le16_to_cpu(dx_root->dr_suballoc_bit); if (dx_root->dr_suballoc_loc) bg_blkno = le64_to_cpu(dx_root->dr_suballoc_loc); else bg_blkno = ocfs2_which_suballoc_group(blk, bit); ret = ocfs2_free_suballoc_bits(handle, dx_alloc_inode, dx_alloc_bh, bit, bg_blkno, 1); if (ret) mlog_errno(ret); out_commit: ocfs2_commit_trans(osb, handle); out_unlock: ocfs2_inode_unlock(dx_alloc_inode, 1); out_mutex: inode_unlock(dx_alloc_inode); brelse(dx_alloc_bh); out: iput(dx_alloc_inode); return ret; } int ocfs2_dx_dir_truncate(struct inode *dir, struct buffer_head *di_bh) { int ret; unsigned int clen; u32 major_hash = UINT_MAX, p_cpos, cpos; u64 blkno; struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); struct buffer_head *dx_root_bh = NULL; struct ocfs2_dx_root_block *dx_root; struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; struct ocfs2_cached_dealloc_ctxt dealloc; struct ocfs2_extent_tree et; ocfs2_init_dealloc_ctxt(&dealloc); if (!ocfs2_dir_indexed(dir)) return 0; ret = ocfs2_read_dx_root(dir, di, &dx_root_bh); if (ret) { mlog_errno(ret); goto out; } dx_root = (struct ocfs2_dx_root_block *)dx_root_bh->b_data; if (ocfs2_dx_root_inline(dx_root)) goto remove_index; ocfs2_init_dx_root_extent_tree(&et, INODE_CACHE(dir), dx_root_bh); /* XXX: What if dr_clusters is too large? */ while (le32_to_cpu(dx_root->dr_clusters)) { ret = ocfs2_dx_dir_lookup_rec(dir, &dx_root->dr_list, major_hash, &cpos, &blkno, &clen); if (ret) { mlog_errno(ret); goto out; } p_cpos = ocfs2_blocks_to_clusters(dir->i_sb, blkno); ret = ocfs2_remove_btree_range(dir, &et, cpos, p_cpos, clen, 0, &dealloc, 0, false); if (ret) { mlog_errno(ret); goto out; } if (cpos == 0) break; major_hash = cpos - 1; } remove_index: ret = ocfs2_dx_dir_remove_index(dir, di_bh, dx_root_bh); if (ret) { mlog_errno(ret); goto out; } ocfs2_remove_from_cache(INODE_CACHE(dir), dx_root_bh); out: ocfs2_schedule_truncate_log_flush(osb, 1); ocfs2_run_deallocs(osb, &dealloc); brelse(dx_root_bh); return ret; } |
| 12 12 1 9 9 2 1 1 3 8 14 14 2 1 1 1 1 3 1 1 1 3 11 11 11 11 1 1 1 2907 1 1 2 2 14 14 1 1 9 8 9 1 1 1 37 1 1 2 25 2 32 1 28 28 15 17 2 1 25 26 12 29 13 13 14 1 1 9 65 66 2893 2893 2893 | 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 | // SPDX-License-Identifier: GPL-2.0 /* * device_cgroup.c - device cgroup subsystem * * Copyright 2007 IBM Corp */ #include <linux/bpf-cgroup.h> #include <linux/device_cgroup.h> #include <linux/cgroup.h> #include <linux/ctype.h> #include <linux/list.h> #include <linux/uaccess.h> #include <linux/seq_file.h> #include <linux/slab.h> #include <linux/rcupdate.h> #include <linux/mutex.h> #ifdef CONFIG_CGROUP_DEVICE static DEFINE_MUTEX(devcgroup_mutex); enum devcg_behavior { DEVCG_DEFAULT_NONE, DEVCG_DEFAULT_ALLOW, DEVCG_DEFAULT_DENY, }; /* * exception list locking rules: * hold devcgroup_mutex for update/read. * hold rcu_read_lock() for read. */ struct dev_exception_item { u32 major, minor; short type; short access; struct list_head list; struct rcu_head rcu; }; struct dev_cgroup { struct cgroup_subsys_state css; struct list_head exceptions; enum devcg_behavior behavior; }; static inline struct dev_cgroup *css_to_devcgroup(struct cgroup_subsys_state *s) { return s ? container_of(s, struct dev_cgroup, css) : NULL; } static inline struct dev_cgroup *task_devcgroup(struct task_struct *task) { return css_to_devcgroup(task_css(task, devices_cgrp_id)); } /* * called under devcgroup_mutex */ static int dev_exceptions_copy(struct list_head *dest, struct list_head *orig) { struct dev_exception_item *ex, *tmp, *new; lockdep_assert_held(&devcgroup_mutex); list_for_each_entry(ex, orig, list) { new = kmemdup(ex, sizeof(*ex), GFP_KERNEL); if (!new) goto free_and_exit; list_add_tail(&new->list, dest); } return 0; free_and_exit: list_for_each_entry_safe(ex, tmp, dest, list) { list_del(&ex->list); kfree(ex); } return -ENOMEM; } static void dev_exceptions_move(struct list_head *dest, struct list_head *orig) { struct dev_exception_item *ex, *tmp; lockdep_assert_held(&devcgroup_mutex); list_for_each_entry_safe(ex, tmp, orig, list) { list_move_tail(&ex->list, dest); } } /* * called under devcgroup_mutex */ static int dev_exception_add(struct dev_cgroup *dev_cgroup, struct dev_exception_item *ex) { struct dev_exception_item *excopy, *walk; lockdep_assert_held(&devcgroup_mutex); excopy = kmemdup(ex, sizeof(*ex), GFP_KERNEL); if (!excopy) return -ENOMEM; list_for_each_entry(walk, &dev_cgroup->exceptions, list) { if (walk->type != ex->type) continue; if (walk->major != ex->major) continue; if (walk->minor != ex->minor) continue; walk->access |= ex->access; kfree(excopy); excopy = NULL; } if (excopy != NULL) list_add_tail_rcu(&excopy->list, &dev_cgroup->exceptions); return 0; } /* * called under devcgroup_mutex */ static void dev_exception_rm(struct dev_cgroup *dev_cgroup, struct dev_exception_item *ex) { struct dev_exception_item *walk, *tmp; lockdep_assert_held(&devcgroup_mutex); list_for_each_entry_safe(walk, tmp, &dev_cgroup->exceptions, list) { if (walk->type != ex->type) continue; if (walk->major != ex->major) continue; if (walk->minor != ex->minor) continue; walk->access &= ~ex->access; if (!walk->access) { list_del_rcu(&walk->list); kfree_rcu(walk, rcu); } } } static void __dev_exception_clean(struct dev_cgroup *dev_cgroup) { struct dev_exception_item *ex, *tmp; list_for_each_entry_safe(ex, tmp, &dev_cgroup->exceptions, list) { list_del_rcu(&ex->list); kfree_rcu(ex, rcu); } } /** * dev_exception_clean - frees all entries of the exception list * @dev_cgroup: dev_cgroup with the exception list to be cleaned * * called under devcgroup_mutex */ static void dev_exception_clean(struct dev_cgroup *dev_cgroup) { lockdep_assert_held(&devcgroup_mutex); __dev_exception_clean(dev_cgroup); } static inline bool is_devcg_online(const struct dev_cgroup *devcg) { return (devcg->behavior != DEVCG_DEFAULT_NONE); } /** * devcgroup_online - initializes devcgroup's behavior and exceptions based on * parent's * @css: css getting online * returns 0 in case of success, error code otherwise */ static int devcgroup_online(struct cgroup_subsys_state *css) { struct dev_cgroup *dev_cgroup = css_to_devcgroup(css); struct dev_cgroup *parent_dev_cgroup = css_to_devcgroup(css->parent); int ret = 0; mutex_lock(&devcgroup_mutex); if (parent_dev_cgroup == NULL) dev_cgroup->behavior = DEVCG_DEFAULT_ALLOW; else { ret = dev_exceptions_copy(&dev_cgroup->exceptions, &parent_dev_cgroup->exceptions); if (!ret) dev_cgroup->behavior = parent_dev_cgroup->behavior; } mutex_unlock(&devcgroup_mutex); return ret; } static void devcgroup_offline(struct cgroup_subsys_state *css) { struct dev_cgroup *dev_cgroup = css_to_devcgroup(css); mutex_lock(&devcgroup_mutex); dev_cgroup->behavior = DEVCG_DEFAULT_NONE; mutex_unlock(&devcgroup_mutex); } /* * called from kernel/cgroup/cgroup.c with cgroup_lock() held. */ static struct cgroup_subsys_state * devcgroup_css_alloc(struct cgroup_subsys_state *parent_css) { struct dev_cgroup *dev_cgroup; dev_cgroup = kzalloc(sizeof(*dev_cgroup), GFP_KERNEL); if (!dev_cgroup) return ERR_PTR(-ENOMEM); INIT_LIST_HEAD(&dev_cgroup->exceptions); dev_cgroup->behavior = DEVCG_DEFAULT_NONE; return &dev_cgroup->css; } static void devcgroup_css_free(struct cgroup_subsys_state *css) { struct dev_cgroup *dev_cgroup = css_to_devcgroup(css); __dev_exception_clean(dev_cgroup); kfree(dev_cgroup); } #define DEVCG_ALLOW 1 #define DEVCG_DENY 2 #define DEVCG_LIST 3 #define MAJMINLEN 13 #define ACCLEN 4 static void set_access(char *acc, short access) { int idx = 0; memset(acc, 0, ACCLEN); if (access & DEVCG_ACC_READ) acc[idx++] = 'r'; if (access & DEVCG_ACC_WRITE) acc[idx++] = 'w'; if (access & DEVCG_ACC_MKNOD) acc[idx++] = 'm'; } static char type_to_char(short type) { if (type == DEVCG_DEV_ALL) return 'a'; if (type == DEVCG_DEV_CHAR) return 'c'; if (type == DEVCG_DEV_BLOCK) return 'b'; return 'X'; } static void set_majmin(char *str, unsigned m) { if (m == ~0) strcpy(str, "*"); else sprintf(str, "%u", m); } static int devcgroup_seq_show(struct seq_file *m, void *v) { struct dev_cgroup *devcgroup = css_to_devcgroup(seq_css(m)); struct dev_exception_item *ex; char maj[MAJMINLEN], min[MAJMINLEN], acc[ACCLEN]; rcu_read_lock(); /* * To preserve the compatibility: * - Only show the "all devices" when the default policy is to allow * - List the exceptions in case the default policy is to deny * This way, the file remains as a "whitelist of devices" */ if (devcgroup->behavior == DEVCG_DEFAULT_ALLOW) { set_access(acc, DEVCG_ACC_MASK); set_majmin(maj, ~0); set_majmin(min, ~0); seq_printf(m, "%c %s:%s %s\n", type_to_char(DEVCG_DEV_ALL), maj, min, acc); } else { list_for_each_entry_rcu(ex, &devcgroup->exceptions, list) { set_access(acc, ex->access); set_majmin(maj, ex->major); set_majmin(min, ex->minor); seq_printf(m, "%c %s:%s %s\n", type_to_char(ex->type), maj, min, acc); } } rcu_read_unlock(); return 0; } /** * match_exception - iterates the exception list trying to find a complete match * @exceptions: list of exceptions * @type: device type (DEVCG_DEV_BLOCK or DEVCG_DEV_CHAR) * @major: device file major number, ~0 to match all * @minor: device file minor number, ~0 to match all * @access: permission mask (DEVCG_ACC_READ, DEVCG_ACC_WRITE, DEVCG_ACC_MKNOD) * * It is considered a complete match if an exception is found that will * contain the entire range of provided parameters. * * Return: true in case it matches an exception completely */ static bool match_exception(struct list_head *exceptions, short type, u32 major, u32 minor, short access) { struct dev_exception_item *ex; list_for_each_entry_rcu(ex, exceptions, list) { if ((type & DEVCG_DEV_BLOCK) && !(ex->type & DEVCG_DEV_BLOCK)) continue; if ((type & DEVCG_DEV_CHAR) && !(ex->type & DEVCG_DEV_CHAR)) continue; if (ex->major != ~0 && ex->major != major) continue; if (ex->minor != ~0 && ex->minor != minor) continue; /* provided access cannot have more than the exception rule */ if (access & (~ex->access)) continue; return true; } return false; } /** * match_exception_partial - iterates the exception list trying to find a partial match * @exceptions: list of exceptions * @type: device type (DEVCG_DEV_BLOCK or DEVCG_DEV_CHAR) * @major: device file major number, ~0 to match all * @minor: device file minor number, ~0 to match all * @access: permission mask (DEVCG_ACC_READ, DEVCG_ACC_WRITE, DEVCG_ACC_MKNOD) * * It is considered a partial match if an exception's range is found to * contain *any* of the devices specified by provided parameters. This is * used to make sure no extra access is being granted that is forbidden by * any of the exception list. * * Return: true in case the provided range mat matches an exception completely */ static bool match_exception_partial(struct list_head *exceptions, short type, u32 major, u32 minor, short access) { struct dev_exception_item *ex; list_for_each_entry_rcu(ex, exceptions, list, lockdep_is_held(&devcgroup_mutex)) { if ((type & DEVCG_DEV_BLOCK) && !(ex->type & DEVCG_DEV_BLOCK)) continue; if ((type & DEVCG_DEV_CHAR) && !(ex->type & DEVCG_DEV_CHAR)) continue; /* * We must be sure that both the exception and the provided * range aren't masking all devices */ if (ex->major != ~0 && major != ~0 && ex->major != major) continue; if (ex->minor != ~0 && minor != ~0 && ex->minor != minor) continue; /* * In order to make sure the provided range isn't matching * an exception, all its access bits shouldn't match the * exception's access bits */ if (!(access & ex->access)) continue; return true; } return false; } /** * verify_new_ex - verifies if a new exception is allowed by parent cgroup's permissions * @dev_cgroup: dev cgroup to be tested against * @refex: new exception * @behavior: behavior of the exception's dev_cgroup * * This is used to make sure a child cgroup won't have more privileges * than its parent */ static bool verify_new_ex(struct dev_cgroup *dev_cgroup, struct dev_exception_item *refex, enum devcg_behavior behavior) { bool match = false; RCU_LOCKDEP_WARN(!rcu_read_lock_held() && !lockdep_is_held(&devcgroup_mutex), "device_cgroup:verify_new_ex called without proper synchronization"); if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW) { if (behavior == DEVCG_DEFAULT_ALLOW) { /* * new exception in the child doesn't matter, only * adding extra restrictions */ return true; } else { /* * new exception in the child will add more devices * that can be accessed, so it can't match any of * parent's exceptions, even slightly */ match = match_exception_partial(&dev_cgroup->exceptions, refex->type, refex->major, refex->minor, refex->access); if (match) return false; return true; } } else { /* * Only behavior == DEVCG_DEFAULT_DENY allowed here, therefore * the new exception will add access to more devices and must * be contained completely in an parent's exception to be * allowed */ match = match_exception(&dev_cgroup->exceptions, refex->type, refex->major, refex->minor, refex->access); if (match) /* parent has an exception that matches the proposed */ return true; else return false; } return false; } /* * parent_has_perm: * when adding a new allow rule to a device exception list, the rule * must be allowed in the parent device */ static int parent_has_perm(struct dev_cgroup *childcg, struct dev_exception_item *ex) { struct dev_cgroup *parent = css_to_devcgroup(childcg->css.parent); if (!parent) return 1; return verify_new_ex(parent, ex, childcg->behavior); } /** * parent_allows_removal - verify if it's ok to remove an exception * @childcg: child cgroup from where the exception will be removed * @ex: exception being removed * * When removing an exception in cgroups with default ALLOW policy, it must * be checked if removing it will give the child cgroup more access than the * parent. * * Return: true if it's ok to remove exception, false otherwise */ static bool parent_allows_removal(struct dev_cgroup *childcg, struct dev_exception_item *ex) { struct dev_cgroup *parent = css_to_devcgroup(childcg->css.parent); if (!parent) return true; /* It's always allowed to remove access to devices */ if (childcg->behavior == DEVCG_DEFAULT_DENY) return true; /* * Make sure you're not removing part or a whole exception existing in * the parent cgroup */ return !match_exception_partial(&parent->exceptions, ex->type, ex->major, ex->minor, ex->access); } /** * may_allow_all - checks if it's possible to change the behavior to * allow based on parent's rules. * @parent: device cgroup's parent * returns: != 0 in case it's allowed, 0 otherwise */ static inline int may_allow_all(struct dev_cgroup *parent) { if (!parent) return 1; return parent->behavior == DEVCG_DEFAULT_ALLOW; } /** * revalidate_active_exceptions - walks through the active exception list and * revalidates the exceptions based on parent's * behavior and exceptions. The exceptions that * are no longer valid will be removed. * Called with devcgroup_mutex held. * @devcg: cgroup which exceptions will be checked * * This is one of the three key functions for hierarchy implementation. * This function is responsible for re-evaluating all the cgroup's active * exceptions due to a parent's exception change. * Refer to Documentation/admin-guide/cgroup-v1/devices.rst for more details. */ static void revalidate_active_exceptions(struct dev_cgroup *devcg) { struct dev_exception_item *ex; struct list_head *this, *tmp; list_for_each_safe(this, tmp, &devcg->exceptions) { ex = container_of(this, struct dev_exception_item, list); if (!parent_has_perm(devcg, ex)) dev_exception_rm(devcg, ex); } } /** * propagate_exception - propagates a new exception to the children * @devcg_root: device cgroup that added a new exception * @ex: new exception to be propagated * * returns: 0 in case of success, != 0 in case of error */ static int propagate_exception(struct dev_cgroup *devcg_root, struct dev_exception_item *ex) { struct cgroup_subsys_state *pos; int rc = 0; rcu_read_lock(); css_for_each_descendant_pre(pos, &devcg_root->css) { struct dev_cgroup *devcg = css_to_devcgroup(pos); /* * Because devcgroup_mutex is held, no devcg will become * online or offline during the tree walk (see on/offline * methods), and online ones are safe to access outside RCU * read lock without bumping refcnt. */ if (pos == &devcg_root->css || !is_devcg_online(devcg)) continue; rcu_read_unlock(); /* * in case both root's behavior and devcg is allow, a new * restriction means adding to the exception list */ if (devcg_root->behavior == DEVCG_DEFAULT_ALLOW && devcg->behavior == DEVCG_DEFAULT_ALLOW) { rc = dev_exception_add(devcg, ex); if (rc) return rc; } else { /* * in the other possible cases: * root's behavior: allow, devcg's: deny * root's behavior: deny, devcg's: deny * the exception will be removed */ dev_exception_rm(devcg, ex); } revalidate_active_exceptions(devcg); rcu_read_lock(); } rcu_read_unlock(); return rc; } /* * Modify the exception list using allow/deny rules. * CAP_SYS_ADMIN is needed for this. It's at least separate from CAP_MKNOD * so we can give a container CAP_MKNOD to let it create devices but not * modify the exception list. * It seems likely we'll want to add a CAP_CONTAINER capability to allow * us to also grant CAP_SYS_ADMIN to containers without giving away the * device exception list controls, but for now we'll stick with CAP_SYS_ADMIN * * Taking rules away is always allowed (given CAP_SYS_ADMIN). Granting * new access is only allowed if you're in the top-level cgroup, or your * parent cgroup has the access you're asking for. */ static int devcgroup_update_access(struct dev_cgroup *devcgroup, int filetype, char *buffer) { const char *b; char temp[12]; /* 11 + 1 characters needed for a u32 */ int count, rc = 0; struct dev_exception_item ex; struct dev_cgroup *parent = css_to_devcgroup(devcgroup->css.parent); struct dev_cgroup tmp_devcgrp; if (!capable(CAP_SYS_ADMIN)) return -EPERM; memset(&ex, 0, sizeof(ex)); memset(&tmp_devcgrp, 0, sizeof(tmp_devcgrp)); b = buffer; switch (*b) { case 'a': switch (filetype) { case DEVCG_ALLOW: if (css_has_online_children(&devcgroup->css)) return -EINVAL; if (!may_allow_all(parent)) return -EPERM; if (!parent) { devcgroup->behavior = DEVCG_DEFAULT_ALLOW; dev_exception_clean(devcgroup); break; } INIT_LIST_HEAD(&tmp_devcgrp.exceptions); rc = dev_exceptions_copy(&tmp_devcgrp.exceptions, &devcgroup->exceptions); if (rc) return rc; dev_exception_clean(devcgroup); rc = dev_exceptions_copy(&devcgroup->exceptions, &parent->exceptions); if (rc) { dev_exceptions_move(&devcgroup->exceptions, &tmp_devcgrp.exceptions); return rc; } devcgroup->behavior = DEVCG_DEFAULT_ALLOW; dev_exception_clean(&tmp_devcgrp); break; case DEVCG_DENY: if (css_has_online_children(&devcgroup->css)) return -EINVAL; dev_exception_clean(devcgroup); devcgroup->behavior = DEVCG_DEFAULT_DENY; break; default: return -EINVAL; } return 0; case 'b': ex.type = DEVCG_DEV_BLOCK; break; case 'c': ex.type = DEVCG_DEV_CHAR; break; default: return -EINVAL; } b++; if (!isspace(*b)) return -EINVAL; b++; if (*b == '*') { ex.major = ~0; b++; } else if (isdigit(*b)) { memset(temp, 0, sizeof(temp)); for (count = 0; count < sizeof(temp) - 1; count++) { temp[count] = *b; b++; if (!isdigit(*b)) break; } rc = kstrtou32(temp, 10, &ex.major); if (rc) return -EINVAL; } else { return -EINVAL; } if (*b != ':') return -EINVAL; b++; /* read minor */ if (*b == '*') { ex.minor = ~0; b++; } else if (isdigit(*b)) { memset(temp, 0, sizeof(temp)); for (count = 0; count < sizeof(temp) - 1; count++) { temp[count] = *b; b++; if (!isdigit(*b)) break; } rc = kstrtou32(temp, 10, &ex.minor); if (rc) return -EINVAL; } else { return -EINVAL; } if (!isspace(*b)) return -EINVAL; for (b++, count = 0; count < 3; count++, b++) { switch (*b) { case 'r': ex.access |= DEVCG_ACC_READ; break; case 'w': ex.access |= DEVCG_ACC_WRITE; break; case 'm': ex.access |= DEVCG_ACC_MKNOD; break; case '\n': case '\0': count = 3; break; default: return -EINVAL; } } switch (filetype) { case DEVCG_ALLOW: /* * If the default policy is to allow by default, try to remove * an matching exception instead. And be silent about it: we * don't want to break compatibility */ if (devcgroup->behavior == DEVCG_DEFAULT_ALLOW) { /* Check if the parent allows removing it first */ if (!parent_allows_removal(devcgroup, &ex)) return -EPERM; dev_exception_rm(devcgroup, &ex); break; } if (!parent_has_perm(devcgroup, &ex)) return -EPERM; rc = dev_exception_add(devcgroup, &ex); break; case DEVCG_DENY: /* * If the default policy is to deny by default, try to remove * an matching exception instead. And be silent about it: we * don't want to break compatibility */ if (devcgroup->behavior == DEVCG_DEFAULT_DENY) dev_exception_rm(devcgroup, &ex); else rc = dev_exception_add(devcgroup, &ex); if (rc) break; /* we only propagate new restrictions */ rc = propagate_exception(devcgroup, &ex); break; default: rc = -EINVAL; } return rc; } static ssize_t devcgroup_access_write(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off) { int retval; mutex_lock(&devcgroup_mutex); retval = devcgroup_update_access(css_to_devcgroup(of_css(of)), of_cft(of)->private, strstrip(buf)); mutex_unlock(&devcgroup_mutex); return retval ?: nbytes; } static struct cftype dev_cgroup_files[] = { { .name = "allow", .write = devcgroup_access_write, .private = DEVCG_ALLOW, }, { .name = "deny", .write = devcgroup_access_write, .private = DEVCG_DENY, }, { .name = "list", .seq_show = devcgroup_seq_show, .private = DEVCG_LIST, }, { } /* terminate */ }; struct cgroup_subsys devices_cgrp_subsys = { .css_alloc = devcgroup_css_alloc, .css_free = devcgroup_css_free, .css_online = devcgroup_online, .css_offline = devcgroup_offline, .legacy_cftypes = dev_cgroup_files, }; /** * devcgroup_legacy_check_permission - checks if an inode operation is permitted * @type: device type * @major: device major number * @minor: device minor number * @access: combination of DEVCG_ACC_WRITE, DEVCG_ACC_READ and DEVCG_ACC_MKNOD * * returns 0 on success, -EPERM case the operation is not permitted */ static int devcgroup_legacy_check_permission(short type, u32 major, u32 minor, short access) { struct dev_cgroup *dev_cgroup; bool rc; rcu_read_lock(); dev_cgroup = task_devcgroup(current); if (dev_cgroup->behavior == DEVCG_DEFAULT_ALLOW) /* Can't match any of the exceptions, even partially */ rc = !match_exception_partial(&dev_cgroup->exceptions, type, major, minor, access); else /* Need to match completely one exception to be allowed */ rc = match_exception(&dev_cgroup->exceptions, type, major, minor, access); rcu_read_unlock(); if (!rc) return -EPERM; return 0; } #endif /* CONFIG_CGROUP_DEVICE */ #if defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF) int devcgroup_check_permission(short type, u32 major, u32 minor, short access) { int rc = BPF_CGROUP_RUN_PROG_DEVICE_CGROUP(type, major, minor, access); if (rc) return rc; #ifdef CONFIG_CGROUP_DEVICE return devcgroup_legacy_check_permission(type, major, minor, access); #else /* CONFIG_CGROUP_DEVICE */ return 0; #endif /* CONFIG_CGROUP_DEVICE */ } EXPORT_SYMBOL(devcgroup_check_permission); #endif /* defined(CONFIG_CGROUP_DEVICE) || defined(CONFIG_CGROUP_BPF) */ |
| 13 13 13 13 13 13 13 765 782 776 15 718 70 665 770 775 739 50 766 776 10 10 17 9 8 9 4 13 13 2 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 | // SPDX-License-Identifier: GPL-2.0 /* * SHA-1 and HMAC-SHA1 library functions */ #include <crypto/hmac.h> #include <crypto/sha1.h> #include <linux/bitops.h> #include <linux/export.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/string.h> #include <linux/unaligned.h> #include <linux/wordpart.h> static const struct sha1_block_state sha1_iv = { .h = { SHA1_H0, SHA1_H1, SHA1_H2, SHA1_H3, SHA1_H4 }, }; /* * If you have 32 registers or more, the compiler can (and should) * try to change the array[] accesses into registers. However, on * machines with less than ~25 registers, that won't really work, * and at least gcc will make an unholy mess of it. * * So to avoid that mess which just slows things down, we force * the stores to memory to actually happen (we might be better off * with a 'W(t)=(val);asm("":"+m" (W(t))' there instead, as * suggested by Artur Skawina - that will also make gcc unable to * try to do the silly "optimize away loads" part because it won't * see what the value will be). * * Ben Herrenschmidt reports that on PPC, the C version comes close * to the optimized asm with this (ie on PPC you don't want that * 'volatile', since there are lots of registers). * * On ARM we get the best code generation by forcing a full memory barrier * between each SHA_ROUND, otherwise gcc happily get wild with spilling and * the stack frame size simply explode and performance goes down the drain. */ #ifdef CONFIG_X86 #define setW(x, val) (*(volatile __u32 *)&W(x) = (val)) #elif defined(CONFIG_ARM) #define setW(x, val) do { W(x) = (val); __asm__("":::"memory"); } while (0) #else #define setW(x, val) (W(x) = (val)) #endif /* This "rolls" over the 512-bit array */ #define W(x) (array[(x)&15]) /* * Where do we get the source from? The first 16 iterations get it from * the input data, the next mix it from the 512-bit array. */ #define SHA_SRC(t) get_unaligned_be32((__u32 *)data + t) #define SHA_MIX(t) rol32(W(t+13) ^ W(t+8) ^ W(t+2) ^ W(t), 1) #define SHA_ROUND(t, input, fn, constant, A, B, C, D, E) do { \ __u32 TEMP = input(t); setW(t, TEMP); \ E += TEMP + rol32(A,5) + (fn) + (constant); \ B = ror32(B, 2); \ TEMP = E; E = D; D = C; C = B; B = A; A = TEMP; } while (0) #define T_0_15(t, A, B, C, D, E) SHA_ROUND(t, SHA_SRC, (((C^D)&B)^D) , 0x5a827999, A, B, C, D, E ) #define T_16_19(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (((C^D)&B)^D) , 0x5a827999, A, B, C, D, E ) #define T_20_39(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0x6ed9eba1, A, B, C, D, E ) #define T_40_59(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, ((B&C)+(D&(B^C))) , 0x8f1bbcdc, A, B, C, D, E ) #define T_60_79(t, A, B, C, D, E) SHA_ROUND(t, SHA_MIX, (B^C^D) , 0xca62c1d6, A, B, C, D, E ) /** * sha1_transform - single block SHA1 transform (deprecated) * * @digest: 160 bit digest to update * @data: 512 bits of data to hash * @array: 16 words of workspace (see note) * * This function executes SHA-1's internal compression function. It updates the * 160-bit internal state (@digest) with a single 512-bit data block (@data). * * Don't use this function. SHA-1 is no longer considered secure. And even if * you do have to use SHA-1, this isn't the correct way to hash something with * SHA-1 as this doesn't handle padding and finalization. * * Note: If the hash is security sensitive, the caller should be sure * to clear the workspace. This is left to the caller to avoid * unnecessary clears between chained hashing operations. */ void sha1_transform(__u32 *digest, const char *data, __u32 *array) { __u32 A, B, C, D, E; unsigned int i = 0; A = digest[0]; B = digest[1]; C = digest[2]; D = digest[3]; E = digest[4]; /* Round 1 - iterations 0-16 take their input from 'data' */ for (; i < 16; ++i) T_0_15(i, A, B, C, D, E); /* Round 1 - tail. Input from 512-bit mixing array */ for (; i < 20; ++i) T_16_19(i, A, B, C, D, E); /* Round 2 */ for (; i < 40; ++i) T_20_39(i, A, B, C, D, E); /* Round 3 */ for (; i < 60; ++i) T_40_59(i, A, B, C, D, E); /* Round 4 */ for (; i < 80; ++i) T_60_79(i, A, B, C, D, E); digest[0] += A; digest[1] += B; digest[2] += C; digest[3] += D; digest[4] += E; } EXPORT_SYMBOL(sha1_transform); /** * sha1_init_raw - initialize the vectors for a SHA1 digest * @buf: vector to initialize */ void sha1_init_raw(__u32 *buf) { buf[0] = 0x67452301; buf[1] = 0xefcdab89; buf[2] = 0x98badcfe; buf[3] = 0x10325476; buf[4] = 0xc3d2e1f0; } EXPORT_SYMBOL(sha1_init_raw); static void __maybe_unused sha1_blocks_generic(struct sha1_block_state *state, const u8 *data, size_t nblocks) { u32 workspace[SHA1_WORKSPACE_WORDS]; do { sha1_transform(state->h, data, workspace); data += SHA1_BLOCK_SIZE; } while (--nblocks); memzero_explicit(workspace, sizeof(workspace)); } #ifdef CONFIG_CRYPTO_LIB_SHA1_ARCH #include "sha1.h" /* $(SRCARCH)/sha1.h */ #else #define sha1_blocks sha1_blocks_generic #endif void sha1_init(struct sha1_ctx *ctx) { ctx->state = sha1_iv; ctx->bytecount = 0; } EXPORT_SYMBOL_GPL(sha1_init); void sha1_update(struct sha1_ctx *ctx, const u8 *data, size_t len) { size_t partial = ctx->bytecount % SHA1_BLOCK_SIZE; ctx->bytecount += len; if (partial + len >= SHA1_BLOCK_SIZE) { size_t nblocks; if (partial) { size_t l = SHA1_BLOCK_SIZE - partial; memcpy(&ctx->buf[partial], data, l); data += l; len -= l; sha1_blocks(&ctx->state, ctx->buf, 1); } nblocks = len / SHA1_BLOCK_SIZE; len %= SHA1_BLOCK_SIZE; if (nblocks) { sha1_blocks(&ctx->state, data, nblocks); data += nblocks * SHA1_BLOCK_SIZE; } partial = 0; } if (len) memcpy(&ctx->buf[partial], data, len); } EXPORT_SYMBOL_GPL(sha1_update); static void __sha1_final(struct sha1_ctx *ctx, u8 out[SHA1_DIGEST_SIZE]) { u64 bitcount = ctx->bytecount << 3; size_t partial = ctx->bytecount % SHA1_BLOCK_SIZE; ctx->buf[partial++] = 0x80; if (partial > SHA1_BLOCK_SIZE - 8) { memset(&ctx->buf[partial], 0, SHA1_BLOCK_SIZE - partial); sha1_blocks(&ctx->state, ctx->buf, 1); partial = 0; } memset(&ctx->buf[partial], 0, SHA1_BLOCK_SIZE - 8 - partial); *(__be64 *)&ctx->buf[SHA1_BLOCK_SIZE - 8] = cpu_to_be64(bitcount); sha1_blocks(&ctx->state, ctx->buf, 1); for (size_t i = 0; i < SHA1_DIGEST_SIZE; i += 4) put_unaligned_be32(ctx->state.h[i / 4], out + i); } void sha1_final(struct sha1_ctx *ctx, u8 out[SHA1_DIGEST_SIZE]) { __sha1_final(ctx, out); memzero_explicit(ctx, sizeof(*ctx)); } EXPORT_SYMBOL_GPL(sha1_final); void sha1(const u8 *data, size_t len, u8 out[SHA1_DIGEST_SIZE]) { struct sha1_ctx ctx; sha1_init(&ctx); sha1_update(&ctx, data, len); sha1_final(&ctx, out); } EXPORT_SYMBOL_GPL(sha1); static void __hmac_sha1_preparekey(struct sha1_block_state *istate, struct sha1_block_state *ostate, const u8 *raw_key, size_t raw_key_len) { union { u8 b[SHA1_BLOCK_SIZE]; unsigned long w[SHA1_BLOCK_SIZE / sizeof(unsigned long)]; } derived_key = { 0 }; if (unlikely(raw_key_len > SHA1_BLOCK_SIZE)) sha1(raw_key, raw_key_len, derived_key.b); else memcpy(derived_key.b, raw_key, raw_key_len); for (size_t i = 0; i < ARRAY_SIZE(derived_key.w); i++) derived_key.w[i] ^= REPEAT_BYTE(HMAC_IPAD_VALUE); *istate = sha1_iv; sha1_blocks(istate, derived_key.b, 1); for (size_t i = 0; i < ARRAY_SIZE(derived_key.w); i++) derived_key.w[i] ^= REPEAT_BYTE(HMAC_OPAD_VALUE ^ HMAC_IPAD_VALUE); *ostate = sha1_iv; sha1_blocks(ostate, derived_key.b, 1); memzero_explicit(&derived_key, sizeof(derived_key)); } void hmac_sha1_preparekey(struct hmac_sha1_key *key, const u8 *raw_key, size_t raw_key_len) { __hmac_sha1_preparekey(&key->istate, &key->ostate, raw_key, raw_key_len); } EXPORT_SYMBOL_GPL(hmac_sha1_preparekey); void hmac_sha1_init(struct hmac_sha1_ctx *ctx, const struct hmac_sha1_key *key) { ctx->sha_ctx.state = key->istate; ctx->sha_ctx.bytecount = SHA1_BLOCK_SIZE; ctx->ostate = key->ostate; } EXPORT_SYMBOL_GPL(hmac_sha1_init); void hmac_sha1_init_usingrawkey(struct hmac_sha1_ctx *ctx, const u8 *raw_key, size_t raw_key_len) { __hmac_sha1_preparekey(&ctx->sha_ctx.state, &ctx->ostate, raw_key, raw_key_len); ctx->sha_ctx.bytecount = SHA1_BLOCK_SIZE; } EXPORT_SYMBOL_GPL(hmac_sha1_init_usingrawkey); void hmac_sha1_final(struct hmac_sha1_ctx *ctx, u8 out[SHA1_DIGEST_SIZE]) { /* Generate the padded input for the outer hash in ctx->sha_ctx.buf. */ __sha1_final(&ctx->sha_ctx, ctx->sha_ctx.buf); memset(&ctx->sha_ctx.buf[SHA1_DIGEST_SIZE], 0, SHA1_BLOCK_SIZE - SHA1_DIGEST_SIZE); ctx->sha_ctx.buf[SHA1_DIGEST_SIZE] = 0x80; *(__be32 *)&ctx->sha_ctx.buf[SHA1_BLOCK_SIZE - 4] = cpu_to_be32(8 * (SHA1_BLOCK_SIZE + SHA1_DIGEST_SIZE)); /* Compute the outer hash, which gives the HMAC value. */ sha1_blocks(&ctx->ostate, ctx->sha_ctx.buf, 1); for (size_t i = 0; i < SHA1_DIGEST_SIZE; i += 4) put_unaligned_be32(ctx->ostate.h[i / 4], out + i); memzero_explicit(ctx, sizeof(*ctx)); } EXPORT_SYMBOL_GPL(hmac_sha1_final); void hmac_sha1(const struct hmac_sha1_key *key, const u8 *data, size_t data_len, u8 out[SHA1_DIGEST_SIZE]) { struct hmac_sha1_ctx ctx; hmac_sha1_init(&ctx, key); hmac_sha1_update(&ctx, data, data_len); hmac_sha1_final(&ctx, out); } EXPORT_SYMBOL_GPL(hmac_sha1); void hmac_sha1_usingrawkey(const u8 *raw_key, size_t raw_key_len, const u8 *data, size_t data_len, u8 out[SHA1_DIGEST_SIZE]) { struct hmac_sha1_ctx ctx; hmac_sha1_init_usingrawkey(&ctx, raw_key, raw_key_len); hmac_sha1_update(&ctx, data, data_len); hmac_sha1_final(&ctx, out); } EXPORT_SYMBOL_GPL(hmac_sha1_usingrawkey); #ifdef sha1_mod_init_arch static int __init sha1_mod_init(void) { sha1_mod_init_arch(); return 0; } subsys_initcall(sha1_mod_init); static void __exit sha1_mod_exit(void) { } module_exit(sha1_mod_exit); #endif MODULE_DESCRIPTION("SHA-1 and HMAC-SHA1 library functions"); MODULE_LICENSE("GPL"); |
| 18 3 14 2 5 2 2 2 5 1 1 2 1 3 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 | // SPDX-License-Identifier: GPL-2.0-or-later /* ----------------------------------------------------------------------- * * * Copyright 2000-2008 H. Peter Anvin - All Rights Reserved * Copyright 2009 Intel Corporation; author: H. Peter Anvin * * ----------------------------------------------------------------------- */ /* * x86 MSR access device * * This device is accessed by lseek() to the appropriate register number * and then read/write in chunks of 8 bytes. A larger size means multiple * reads or writes of the same register. * * This driver uses /dev/cpu/%d/msr where %d is the minor number, and on * an SMP box will direct the access to CPU %d. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/module.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/fcntl.h> #include <linux/init.h> #include <linux/poll.h> #include <linux/smp.h> #include <linux/major.h> #include <linux/fs.h> #include <linux/device.h> #include <linux/cpu.h> #include <linux/notifier.h> #include <linux/uaccess.h> #include <linux/gfp.h> #include <linux/security.h> #include <asm/cpufeature.h> #include <asm/msr.h> static enum cpuhp_state cpuhp_msr_state; enum allow_write_msrs { MSR_WRITES_ON, MSR_WRITES_OFF, MSR_WRITES_DEFAULT, }; static enum allow_write_msrs allow_writes = MSR_WRITES_DEFAULT; static ssize_t msr_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) { u32 __user *tmp = (u32 __user *) buf; u32 data[2]; u32 reg = *ppos; int cpu = iminor(file_inode(file)); int err = 0; ssize_t bytes = 0; if (count % 8) return -EINVAL; /* Invalid chunk size */ for (; count; count -= 8) { err = rdmsr_safe_on_cpu(cpu, reg, &data[0], &data[1]); if (err) break; if (copy_to_user(tmp, &data, 8)) { err = -EFAULT; break; } tmp += 2; bytes += 8; } return bytes ? bytes : err; } static int filter_write(u32 reg) { /* * MSRs writes usually happen all at once, and can easily saturate kmsg. * Only allow one message every 30 seconds. * * It's possible to be smarter here and do it (for example) per-MSR, but * it would certainly be more complex, and this is enough at least to * avoid saturating the ring buffer. */ static DEFINE_RATELIMIT_STATE(fw_rs, 30 * HZ, 1); switch (allow_writes) { case MSR_WRITES_ON: return 0; case MSR_WRITES_OFF: return -EPERM; default: break; } if (!__ratelimit(&fw_rs)) return 0; pr_warn("Write to unrecognized MSR 0x%x by %s (pid: %d).\n", reg, current->comm, current->pid); pr_warn("See https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/about for details.\n"); return 0; } static ssize_t msr_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { const u32 __user *tmp = (const u32 __user *)buf; u32 data[2]; u32 reg = *ppos; int cpu = iminor(file_inode(file)); int err = 0; ssize_t bytes = 0; err = security_locked_down(LOCKDOWN_MSR); if (err) return err; err = filter_write(reg); if (err) return err; if (count % 8) return -EINVAL; /* Invalid chunk size */ for (; count; count -= 8) { if (copy_from_user(&data, tmp, 8)) { err = -EFAULT; break; } add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK); err = wrmsr_safe_on_cpu(cpu, reg, data[0], data[1]); if (err) break; tmp += 2; bytes += 8; } return bytes ? bytes : err; } static long msr_ioctl(struct file *file, unsigned int ioc, unsigned long arg) { u32 __user *uregs = (u32 __user *)arg; u32 regs[8]; int cpu = iminor(file_inode(file)); int err; switch (ioc) { case X86_IOC_RDMSR_REGS: if (!(file->f_mode & FMODE_READ)) { err = -EBADF; break; } if (copy_from_user(®s, uregs, sizeof(regs))) { err = -EFAULT; break; } err = rdmsr_safe_regs_on_cpu(cpu, regs); if (err) break; if (copy_to_user(uregs, ®s, sizeof(regs))) err = -EFAULT; break; case X86_IOC_WRMSR_REGS: if (!(file->f_mode & FMODE_WRITE)) { err = -EBADF; break; } if (copy_from_user(®s, uregs, sizeof(regs))) { err = -EFAULT; break; } err = security_locked_down(LOCKDOWN_MSR); if (err) break; err = filter_write(regs[1]); if (err) return err; add_taint(TAINT_CPU_OUT_OF_SPEC, LOCKDEP_STILL_OK); err = wrmsr_safe_regs_on_cpu(cpu, regs); if (err) break; if (copy_to_user(uregs, ®s, sizeof(regs))) err = -EFAULT; break; default: err = -ENOTTY; break; } return err; } static int msr_open(struct inode *inode, struct file *file) { unsigned int cpu = iminor(file_inode(file)); struct cpuinfo_x86 *c; if (!capable(CAP_SYS_RAWIO)) return -EPERM; if (cpu >= nr_cpu_ids || !cpu_online(cpu)) return -ENXIO; /* No such CPU */ c = &cpu_data(cpu); if (!cpu_has(c, X86_FEATURE_MSR)) return -EIO; /* MSR not supported */ return 0; } /* * File operations we support */ static const struct file_operations msr_fops = { .owner = THIS_MODULE, .llseek = no_seek_end_llseek, .read = msr_read, .write = msr_write, .open = msr_open, .unlocked_ioctl = msr_ioctl, .compat_ioctl = msr_ioctl, }; static char *msr_devnode(const struct device *dev, umode_t *mode) { return kasprintf(GFP_KERNEL, "cpu/%u/msr", MINOR(dev->devt)); } static const struct class msr_class = { .name = "msr", .devnode = msr_devnode, }; static int msr_device_create(unsigned int cpu) { struct device *dev; dev = device_create(&msr_class, NULL, MKDEV(MSR_MAJOR, cpu), NULL, "msr%d", cpu); return PTR_ERR_OR_ZERO(dev); } static int msr_device_destroy(unsigned int cpu) { device_destroy(&msr_class, MKDEV(MSR_MAJOR, cpu)); return 0; } static int __init msr_init(void) { int err; if (__register_chrdev(MSR_MAJOR, 0, NR_CPUS, "cpu/msr", &msr_fops)) { pr_err("unable to get major %d for msr\n", MSR_MAJOR); return -EBUSY; } err = class_register(&msr_class); if (err) goto out_chrdev; err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "x86/msr:online", msr_device_create, msr_device_destroy); if (err < 0) goto out_class; cpuhp_msr_state = err; return 0; out_class: class_unregister(&msr_class); out_chrdev: __unregister_chrdev(MSR_MAJOR, 0, NR_CPUS, "cpu/msr"); return err; } module_init(msr_init); static void __exit msr_exit(void) { cpuhp_remove_state(cpuhp_msr_state); class_unregister(&msr_class); __unregister_chrdev(MSR_MAJOR, 0, NR_CPUS, "cpu/msr"); } module_exit(msr_exit) static int set_allow_writes(const char *val, const struct kernel_param *cp) { /* val is NUL-terminated, see kernfs_fop_write() */ char *s = strstrip((char *)val); if (!strcmp(s, "on")) allow_writes = MSR_WRITES_ON; else if (!strcmp(s, "off")) allow_writes = MSR_WRITES_OFF; else allow_writes = MSR_WRITES_DEFAULT; return 0; } static int get_allow_writes(char *buf, const struct kernel_param *kp) { const char *res; switch (allow_writes) { case MSR_WRITES_ON: res = "on"; break; case MSR_WRITES_OFF: res = "off"; break; default: res = "default"; break; } return sprintf(buf, "%s\n", res); } static const struct kernel_param_ops allow_writes_ops = { .set = set_allow_writes, .get = get_allow_writes }; module_param_cb(allow_writes, &allow_writes_ops, NULL, 0600); MODULE_AUTHOR("H. Peter Anvin <hpa@zytor.com>"); MODULE_DESCRIPTION("x86 generic MSR driver"); MODULE_LICENSE("GPL"); |
| 33 17 43 8 8 8 8 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 | #ifndef __LINUX_MROUTE_BASE_H #define __LINUX_MROUTE_BASE_H #include <linux/netdevice.h> #include <linux/rhashtable-types.h> #include <linux/spinlock.h> #include <net/net_namespace.h> #include <net/sock.h> #include <net/fib_notifier.h> #include <net/ip_fib.h> /** * struct vif_device - interface representor for multicast routing * @dev: network device being used * @dev_tracker: refcount tracker for @dev reference * @bytes_in: statistic; bytes ingressing * @bytes_out: statistic; bytes egresing * @pkt_in: statistic; packets ingressing * @pkt_out: statistic; packets egressing * @rate_limit: Traffic shaping (NI) * @threshold: TTL threshold * @flags: Control flags * @link: Physical interface index * @dev_parent_id: device parent id * @local: Local address * @remote: Remote address for tunnels */ struct vif_device { struct net_device __rcu *dev; netdevice_tracker dev_tracker; unsigned long bytes_in, bytes_out; unsigned long pkt_in, pkt_out; unsigned long rate_limit; unsigned char threshold; unsigned short flags; int link; /* Currently only used by ipmr */ struct netdev_phys_item_id dev_parent_id; __be32 local, remote; }; struct vif_entry_notifier_info { struct fib_notifier_info info; struct net_device *dev; unsigned short vif_index; unsigned short vif_flags; u32 tb_id; }; static inline int mr_call_vif_notifier(struct notifier_block *nb, unsigned short family, enum fib_event_type event_type, struct vif_device *vif, struct net_device *vif_dev, unsigned short vif_index, u32 tb_id, struct netlink_ext_ack *extack) { struct vif_entry_notifier_info info = { .info = { .family = family, .extack = extack, }, .dev = vif_dev, .vif_index = vif_index, .vif_flags = vif->flags, .tb_id = tb_id, }; return call_fib_notifier(nb, event_type, &info.info); } static inline int mr_call_vif_notifiers(struct net *net, unsigned short family, enum fib_event_type event_type, struct vif_device *vif, struct net_device *vif_dev, unsigned short vif_index, u32 tb_id, unsigned int *ipmr_seq) { struct vif_entry_notifier_info info = { .info = { .family = family, }, .dev = vif_dev, .vif_index = vif_index, .vif_flags = vif->flags, .tb_id = tb_id, }; ASSERT_RTNL(); (*ipmr_seq)++; return call_fib_notifiers(net, event_type, &info.info); } #ifndef MAXVIFS /* This one is nasty; value is defined in uapi using different symbols for * mroute and morute6 but both map into same 32. */ #define MAXVIFS 32 #endif /* Note: This helper is deprecated. */ #define VIF_EXISTS(_mrt, _idx) (!!rcu_access_pointer((_mrt)->vif_table[_idx].dev)) /* mfc_flags: * MFC_STATIC - the entry was added statically (not by a routing daemon) * MFC_OFFLOAD - the entry was offloaded to the hardware */ enum { MFC_STATIC = BIT(0), MFC_OFFLOAD = BIT(1), }; /** * struct mr_mfc - common multicast routing entries * @mnode: rhashtable list * @mfc_parent: source interface (iif) * @mfc_flags: entry flags * @expires: unresolved entry expire time * @unresolved: unresolved cached skbs * @last_assert: time of last assert * @minvif: minimum VIF id * @maxvif: maximum VIF id * @bytes: bytes that have passed for this entry * @pkt: packets that have passed for this entry * @wrong_if: number of wrong source interface hits * @lastuse: time of last use of the group (traffic or update) * @ttls: OIF TTL threshold array * @refcount: reference count for this entry * @list: global entry list * @rcu: used for entry destruction * @free: Operation used for freeing an entry under RCU */ struct mr_mfc { struct rhlist_head mnode; unsigned short mfc_parent; int mfc_flags; union { struct { unsigned long expires; struct sk_buff_head unresolved; } unres; struct { unsigned long last_assert; int minvif; int maxvif; atomic_long_t bytes; atomic_long_t pkt; atomic_long_t wrong_if; unsigned long lastuse; unsigned char ttls[MAXVIFS]; refcount_t refcount; } res; } mfc_un; struct list_head list; struct rcu_head rcu; void (*free)(struct rcu_head *head); }; static inline void mr_cache_put(struct mr_mfc *c) { if (refcount_dec_and_test(&c->mfc_un.res.refcount)) call_rcu(&c->rcu, c->free); } static inline void mr_cache_hold(struct mr_mfc *c) { refcount_inc(&c->mfc_un.res.refcount); } struct mfc_entry_notifier_info { struct fib_notifier_info info; struct mr_mfc *mfc; u32 tb_id; }; static inline int mr_call_mfc_notifier(struct notifier_block *nb, unsigned short family, enum fib_event_type event_type, struct mr_mfc *mfc, u32 tb_id, struct netlink_ext_ack *extack) { struct mfc_entry_notifier_info info = { .info = { .family = family, .extack = extack, }, .mfc = mfc, .tb_id = tb_id }; return call_fib_notifier(nb, event_type, &info.info); } static inline int mr_call_mfc_notifiers(struct net *net, unsigned short family, enum fib_event_type event_type, struct mr_mfc *mfc, u32 tb_id, unsigned int *ipmr_seq) { struct mfc_entry_notifier_info info = { .info = { .family = family, }, .mfc = mfc, .tb_id = tb_id }; ASSERT_RTNL(); (*ipmr_seq)++; return call_fib_notifiers(net, event_type, &info.info); } struct mr_table; /** * struct mr_table_ops - callbacks and info for protocol-specific ops * @rht_params: parameters for accessing the MFC hash * @cmparg_any: a hash key to be used for matching on (*,*) routes */ struct mr_table_ops { const struct rhashtable_params *rht_params; void *cmparg_any; }; /** * struct mr_table - a multicast routing table * @list: entry within a list of multicast routing tables * @net: net where this table belongs * @ops: protocol specific operations * @id: identifier of the table * @mroute_sk: socket associated with the table * @ipmr_expire_timer: timer for handling unresolved routes * @mfc_unres_queue: list of unresolved MFC entries * @vif_table: array containing all possible vifs * @mfc_hash: Hash table of all resolved routes for easy lookup * @mfc_cache_list: list of resovled routes for possible traversal * @maxvif: Identifier of highest value vif currently in use * @cache_resolve_queue_len: current size of unresolved queue * @mroute_do_assert: Whether to inform userspace on wrong ingress * @mroute_do_pim: Whether to receive IGMP PIMv1 * @mroute_reg_vif_num: PIM-device vif index */ struct mr_table { struct list_head list; possible_net_t net; struct mr_table_ops ops; u32 id; struct sock __rcu *mroute_sk; struct timer_list ipmr_expire_timer; struct list_head mfc_unres_queue; struct vif_device vif_table[MAXVIFS]; struct rhltable mfc_hash; struct list_head mfc_cache_list; int maxvif; atomic_t cache_resolve_queue_len; bool mroute_do_assert; bool mroute_do_pim; bool mroute_do_wrvifwhole; int mroute_reg_vif_num; }; static inline bool mr_can_free_table(struct net *net) { return !check_net(net) || !net_initialized(net); } #ifdef CONFIG_IP_MROUTE_COMMON void vif_device_init(struct vif_device *v, struct net_device *dev, unsigned long rate_limit, unsigned char threshold, unsigned short flags, unsigned short get_iflink_mask); struct mr_table * mr_table_alloc(struct net *net, u32 id, struct mr_table_ops *ops, void (*expire_func)(struct timer_list *t), void (*table_set)(struct mr_table *mrt, struct net *net)); /* These actually return 'struct mr_mfc *', but to avoid need for explicit * castings they simply return void. */ void *mr_mfc_find_parent(struct mr_table *mrt, void *hasharg, int parent); void *mr_mfc_find_any_parent(struct mr_table *mrt, int vifi); void *mr_mfc_find_any(struct mr_table *mrt, int vifi, void *hasharg); int mr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, struct mr_mfc *c, struct rtmsg *rtm); int mr_table_dump(struct mr_table *mrt, struct sk_buff *skb, struct netlink_callback *cb, int (*fill)(struct mr_table *mrt, struct sk_buff *skb, u32 portid, u32 seq, struct mr_mfc *c, int cmd, int flags), spinlock_t *lock, struct fib_dump_filter *filter); int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb, struct mr_table *(*iter)(struct net *net, struct mr_table *mrt), int (*fill)(struct mr_table *mrt, struct sk_buff *skb, u32 portid, u32 seq, struct mr_mfc *c, int cmd, int flags), spinlock_t *lock, struct fib_dump_filter *filter); int mr_dump(struct net *net, struct notifier_block *nb, unsigned short family, int (*rules_dump)(struct net *net, struct notifier_block *nb, struct netlink_ext_ack *extack), struct mr_table *(*mr_iter)(struct net *net, struct mr_table *mrt), struct netlink_ext_ack *extack); #else static inline void vif_device_init(struct vif_device *v, struct net_device *dev, unsigned long rate_limit, unsigned char threshold, unsigned short flags, unsigned short get_iflink_mask) { } static inline void *mr_mfc_find_parent(struct mr_table *mrt, void *hasharg, int parent) { return NULL; } static inline void *mr_mfc_find_any_parent(struct mr_table *mrt, int vifi) { return NULL; } static inline struct mr_mfc *mr_mfc_find_any(struct mr_table *mrt, int vifi, void *hasharg) { return NULL; } static inline int mr_fill_mroute(struct mr_table *mrt, struct sk_buff *skb, struct mr_mfc *c, struct rtmsg *rtm) { return -EINVAL; } static inline int mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb, struct mr_table *(*iter)(struct net *net, struct mr_table *mrt), int (*fill)(struct mr_table *mrt, struct sk_buff *skb, u32 portid, u32 seq, struct mr_mfc *c, int cmd, int flags), spinlock_t *lock, struct fib_dump_filter *filter) { return -EINVAL; } static inline int mr_dump(struct net *net, struct notifier_block *nb, unsigned short family, int (*rules_dump)(struct net *net, struct notifier_block *nb, struct netlink_ext_ack *extack), struct mr_table *(*mr_iter)(struct net *net, struct mr_table *mrt), struct netlink_ext_ack *extack) { return -EINVAL; } #endif static inline void *mr_mfc_find(struct mr_table *mrt, void *hasharg) { return mr_mfc_find_parent(mrt, hasharg, -1); } #ifdef CONFIG_PROC_FS struct mr_vif_iter { struct seq_net_private p; struct mr_table *mrt; int ct; }; struct mr_mfc_iter { struct seq_net_private p; struct mr_table *mrt; struct list_head *cache; /* Lock protecting the mr_table's unresolved queue */ spinlock_t *lock; }; #ifdef CONFIG_IP_MROUTE_COMMON void *mr_vif_seq_idx(struct net *net, struct mr_vif_iter *iter, loff_t pos); void *mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos); static inline void *mr_vif_seq_start(struct seq_file *seq, loff_t *pos) { return *pos ? mr_vif_seq_idx(seq_file_net(seq), seq->private, *pos - 1) : SEQ_START_TOKEN; } /* These actually return 'struct mr_mfc *', but to avoid need for explicit * castings they simply return void. */ void *mr_mfc_seq_idx(struct net *net, struct mr_mfc_iter *it, loff_t pos); void *mr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos); static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos, struct mr_table *mrt, spinlock_t *lock) { struct mr_mfc_iter *it = seq->private; it->mrt = mrt; it->cache = NULL; it->lock = lock; return *pos ? mr_mfc_seq_idx(seq_file_net(seq), seq->private, *pos - 1) : SEQ_START_TOKEN; } static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v) { struct mr_mfc_iter *it = seq->private; struct mr_table *mrt = it->mrt; if (it->cache == &mrt->mfc_unres_queue) spin_unlock_bh(it->lock); else if (it->cache == &mrt->mfc_cache_list) rcu_read_unlock(); } #else static inline void *mr_vif_seq_idx(struct net *net, struct mr_vif_iter *iter, loff_t pos) { return NULL; } static inline void *mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) { return NULL; } static inline void *mr_vif_seq_start(struct seq_file *seq, loff_t *pos) { return NULL; } static inline void *mr_mfc_seq_idx(struct net *net, struct mr_mfc_iter *it, loff_t pos) { return NULL; } static inline void *mr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) { return NULL; } static inline void *mr_mfc_seq_start(struct seq_file *seq, loff_t *pos, struct mr_table *mrt, spinlock_t *lock) { return NULL; } static inline void mr_mfc_seq_stop(struct seq_file *seq, void *v) { } #endif #endif #endif |
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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 | // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB /* * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. * Copyright (c) 2004 Topspin Corporation. All rights reserved. * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. * Copyright (c) 2019, Mellanox Technologies inc. All rights reserved. */ #include <linux/completion.h> #include <linux/dma-mapping.h> #include <linux/device.h> #include <linux/module.h> #include <linux/err.h> #include <linux/idr.h> #include <linux/interrupt.h> #include <linux/random.h> #include <linux/rbtree.h> #include <linux/spinlock.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/workqueue.h> #include <linux/kdev_t.h> #include <linux/etherdevice.h> #include <rdma/ib_cache.h> #include <rdma/ib_cm.h> #include <rdma/ib_sysfs.h> #include "cm_msgs.h" #include "core_priv.h" #include "cm_trace.h" MODULE_AUTHOR("Sean Hefty"); MODULE_DESCRIPTION("InfiniBand CM"); MODULE_LICENSE("Dual BSD/GPL"); #define CM_DESTROY_ID_WAIT_TIMEOUT 10000 /* msecs */ #define CM_DIRECT_RETRY_CTX ((void *) 1UL) #define CM_MRA_SETTING 24 /* 4.096us * 2^24 = ~68.7 seconds */ static const char * const ibcm_rej_reason_strs[] = { [IB_CM_REJ_NO_QP] = "no QP", [IB_CM_REJ_NO_EEC] = "no EEC", [IB_CM_REJ_NO_RESOURCES] = "no resources", [IB_CM_REJ_TIMEOUT] = "timeout", [IB_CM_REJ_UNSUPPORTED] = "unsupported", [IB_CM_REJ_INVALID_COMM_ID] = "invalid comm ID", [IB_CM_REJ_INVALID_COMM_INSTANCE] = "invalid comm instance", [IB_CM_REJ_INVALID_SERVICE_ID] = "invalid service ID", [IB_CM_REJ_INVALID_TRANSPORT_TYPE] = "invalid transport type", [IB_CM_REJ_STALE_CONN] = "stale conn", [IB_CM_REJ_RDC_NOT_EXIST] = "RDC not exist", [IB_CM_REJ_INVALID_GID] = "invalid GID", [IB_CM_REJ_INVALID_LID] = "invalid LID", [IB_CM_REJ_INVALID_SL] = "invalid SL", [IB_CM_REJ_INVALID_TRAFFIC_CLASS] = "invalid traffic class", [IB_CM_REJ_INVALID_HOP_LIMIT] = "invalid hop limit", [IB_CM_REJ_INVALID_PACKET_RATE] = "invalid packet rate", [IB_CM_REJ_INVALID_ALT_GID] = "invalid alt GID", [IB_CM_REJ_INVALID_ALT_LID] = "invalid alt LID", [IB_CM_REJ_INVALID_ALT_SL] = "invalid alt SL", [IB_CM_REJ_INVALID_ALT_TRAFFIC_CLASS] = "invalid alt traffic class", [IB_CM_REJ_INVALID_ALT_HOP_LIMIT] = "invalid alt hop limit", [IB_CM_REJ_INVALID_ALT_PACKET_RATE] = "invalid alt packet rate", [IB_CM_REJ_PORT_CM_REDIRECT] = "port CM redirect", [IB_CM_REJ_PORT_REDIRECT] = "port redirect", [IB_CM_REJ_INVALID_MTU] = "invalid MTU", [IB_CM_REJ_INSUFFICIENT_RESP_RESOURCES] = "insufficient resp resources", [IB_CM_REJ_CONSUMER_DEFINED] = "consumer defined", [IB_CM_REJ_INVALID_RNR_RETRY] = "invalid RNR retry", [IB_CM_REJ_DUPLICATE_LOCAL_COMM_ID] = "duplicate local comm ID", [IB_CM_REJ_INVALID_CLASS_VERSION] = "invalid class version", [IB_CM_REJ_INVALID_FLOW_LABEL] = "invalid flow label", [IB_CM_REJ_INVALID_ALT_FLOW_LABEL] = "invalid alt flow label", [IB_CM_REJ_VENDOR_OPTION_NOT_SUPPORTED] = "vendor option is not supported", }; const char *__attribute_const__ ibcm_reject_msg(int reason) { size_t index = reason; if (index < ARRAY_SIZE(ibcm_rej_reason_strs) && ibcm_rej_reason_strs[index]) return ibcm_rej_reason_strs[index]; else return "unrecognized reason"; } EXPORT_SYMBOL(ibcm_reject_msg); struct cm_id_private; struct cm_work; static int cm_add_one(struct ib_device *device); static void cm_remove_one(struct ib_device *device, void *client_data); static void cm_process_work(struct cm_id_private *cm_id_priv, struct cm_work *work); static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, struct ib_cm_sidr_rep_param *param); static void cm_issue_dreq(struct cm_id_private *cm_id_priv); static int cm_send_drep_locked(struct cm_id_private *cm_id_priv, void *private_data, u8 private_data_len); static int cm_send_rej_locked(struct cm_id_private *cm_id_priv, enum ib_cm_rej_reason reason, void *ari, u8 ari_length, const void *private_data, u8 private_data_len); static struct ib_client cm_client = { .name = "cm", .add = cm_add_one, .remove = cm_remove_one }; static struct ib_cm { spinlock_t lock; struct list_head device_list; rwlock_t device_lock; struct rb_root listen_service_table; u64 listen_service_id; /* struct rb_root peer_service_table; todo: fix peer to peer */ struct rb_root remote_qp_table; struct rb_root remote_id_table; struct rb_root remote_sidr_table; struct xarray local_id_table; u32 local_id_next; __be32 random_id_operand; struct list_head timewait_list; struct workqueue_struct *wq; } cm; /* Counter indexes ordered by attribute ID */ enum { CM_REQ_COUNTER, CM_MRA_COUNTER, CM_REJ_COUNTER, CM_REP_COUNTER, CM_RTU_COUNTER, CM_DREQ_COUNTER, CM_DREP_COUNTER, CM_SIDR_REQ_COUNTER, CM_SIDR_REP_COUNTER, CM_LAP_COUNTER, CM_APR_COUNTER, CM_ATTR_COUNT, CM_ATTR_ID_OFFSET = 0x0010, }; enum { CM_XMIT, CM_XMIT_RETRIES, CM_RECV, CM_RECV_DUPLICATES, CM_COUNTER_GROUPS }; struct cm_counter_attribute { struct ib_port_attribute attr; unsigned short group; unsigned short index; }; struct cm_port { struct cm_device *cm_dev; struct ib_mad_agent *mad_agent; struct ib_mad_agent *rep_agent; u32 port_num; atomic_long_t counters[CM_COUNTER_GROUPS][CM_ATTR_COUNT]; }; struct cm_device { struct kref kref; struct list_head list; rwlock_t mad_agent_lock; struct ib_device *ib_device; u8 ack_delay; int going_down; struct cm_port *port[]; }; struct cm_av { struct cm_port *port; struct rdma_ah_attr ah_attr; u16 dlid_datapath; u16 pkey_index; u8 timeout; }; struct cm_work { struct delayed_work work; struct list_head list; struct cm_port *port; struct ib_mad_recv_wc *mad_recv_wc; /* Received MADs */ __be32 local_id; /* Established / timewait */ __be32 remote_id; struct ib_cm_event cm_event; struct sa_path_rec path[]; }; struct cm_timewait_info { struct cm_work work; struct list_head list; struct rb_node remote_qp_node; struct rb_node remote_id_node; __be64 remote_ca_guid; __be32 remote_qpn; u8 inserted_remote_qp; u8 inserted_remote_id; }; struct cm_id_private { struct ib_cm_id id; struct rb_node service_node; struct rb_node sidr_id_node; u32 sidr_slid; spinlock_t lock; /* Do not acquire inside cm.lock */ struct completion comp; refcount_t refcount; /* Number of clients sharing this ib_cm_id. Only valid for listeners. * Protected by the cm.lock spinlock. */ int listen_sharecount; struct rcu_head rcu; struct ib_mad_send_buf *msg; struct cm_timewait_info *timewait_info; /* todo: use alternate port on send failure */ struct cm_av av; struct cm_av alt_av; void *private_data; __be64 tid; __be32 local_qpn; __be32 remote_qpn; enum ib_qp_type qp_type; __be32 sq_psn; __be32 rq_psn; int timeout_ms; enum ib_mtu path_mtu; __be16 pkey; u8 private_data_len; u8 max_cm_retries; u8 responder_resources; u8 initiator_depth; u8 retry_count; u8 rnr_retry_count; u8 target_ack_delay; struct list_head work_list; atomic_t work_count; struct rdma_ucm_ece ece; }; static void cm_dev_release(struct kref *kref) { struct cm_device *cm_dev = container_of(kref, struct cm_device, kref); u32 i; rdma_for_each_port(cm_dev->ib_device, i) kfree(cm_dev->port[i - 1]); kfree(cm_dev); } static void cm_device_put(struct cm_device *cm_dev) { kref_put(&cm_dev->kref, cm_dev_release); } static void cm_work_handler(struct work_struct *work); static inline void cm_deref_id(struct cm_id_private *cm_id_priv) { if (refcount_dec_and_test(&cm_id_priv->refcount)) complete(&cm_id_priv->comp); } static struct ib_mad_send_buf * cm_alloc_msg_agent(struct cm_id_private *cm_id_priv, bool rep_agent) { struct ib_mad_agent *mad_agent; struct ib_mad_send_buf *m; struct ib_ah *ah; lockdep_assert_held(&cm_id_priv->lock); if (!cm_id_priv->av.port) return ERR_PTR(-EINVAL); read_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); mad_agent = rep_agent ? cm_id_priv->av.port->rep_agent : cm_id_priv->av.port->mad_agent; if (!mad_agent) { m = ERR_PTR(-EINVAL); goto out; } ah = rdma_create_ah(mad_agent->qp->pd, &cm_id_priv->av.ah_attr, 0); if (IS_ERR(ah)) { m = ERR_CAST(ah); goto out; } m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, cm_id_priv->av.pkey_index, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC, IB_MGMT_BASE_VERSION); if (IS_ERR(m)) { rdma_destroy_ah(ah, 0); goto out; } m->ah = ah; out: read_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); return m; } static struct ib_mad_send_buf *cm_alloc_msg(struct cm_id_private *cm_id_priv) { return cm_alloc_msg_agent(cm_id_priv, false); } static void cm_free_msg(struct ib_mad_send_buf *msg) { if (msg->ah) rdma_destroy_ah(msg->ah, 0); ib_free_send_mad(msg); } static struct ib_mad_send_buf * cm_alloc_priv_msg_rep(struct cm_id_private *cm_id_priv, enum ib_cm_state state, bool rep_agent) { struct ib_mad_send_buf *msg; lockdep_assert_held(&cm_id_priv->lock); msg = cm_alloc_msg_agent(cm_id_priv, rep_agent); if (IS_ERR(msg)) return msg; cm_id_priv->msg = msg; refcount_inc(&cm_id_priv->refcount); msg->context[0] = cm_id_priv; msg->context[1] = (void *) (unsigned long) state; msg->retries = cm_id_priv->max_cm_retries; msg->timeout_ms = cm_id_priv->timeout_ms; return msg; } static struct ib_mad_send_buf * cm_alloc_priv_msg(struct cm_id_private *cm_id_priv, enum ib_cm_state state) { return cm_alloc_priv_msg_rep(cm_id_priv, state, false); } static void cm_free_priv_msg(struct ib_mad_send_buf *msg) { struct cm_id_private *cm_id_priv = msg->context[0]; lockdep_assert_held(&cm_id_priv->lock); if (!WARN_ON(cm_id_priv->msg != msg)) cm_id_priv->msg = NULL; if (msg->ah) rdma_destroy_ah(msg->ah, 0); cm_deref_id(cm_id_priv); ib_free_send_mad(msg); } static struct ib_mad_send_buf * cm_alloc_response_msg_no_ah(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, bool direct_retry) { struct ib_mad_send_buf *m; m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, GFP_ATOMIC, IB_MGMT_BASE_VERSION); if (!IS_ERR(m)) m->context[0] = direct_retry ? CM_DIRECT_RETRY_CTX : NULL; return m; } static int cm_create_response_msg_ah(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, struct ib_mad_send_buf *msg) { struct ib_ah *ah; ah = ib_create_ah_from_wc(port->mad_agent->qp->pd, mad_recv_wc->wc, mad_recv_wc->recv_buf.grh, port->port_num); if (IS_ERR(ah)) return PTR_ERR(ah); msg->ah = ah; return 0; } static int cm_alloc_response_msg(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, bool direct_retry, struct ib_mad_send_buf **msg) { struct ib_mad_send_buf *m; int ret; m = cm_alloc_response_msg_no_ah(port, mad_recv_wc, direct_retry); if (IS_ERR(m)) return PTR_ERR(m); ret = cm_create_response_msg_ah(port, mad_recv_wc, m); if (ret) { ib_free_send_mad(m); return ret; } *msg = m; return 0; } static void *cm_copy_private_data(const void *private_data, u8 private_data_len) { void *data; if (!private_data || !private_data_len) return NULL; data = kmemdup(private_data, private_data_len, GFP_KERNEL); if (!data) return ERR_PTR(-ENOMEM); return data; } static void cm_set_private_data(struct cm_id_private *cm_id_priv, void *private_data, u8 private_data_len) { if (cm_id_priv->private_data && cm_id_priv->private_data_len) kfree(cm_id_priv->private_data); cm_id_priv->private_data = private_data; cm_id_priv->private_data_len = private_data_len; } static void cm_set_av_port(struct cm_av *av, struct cm_port *port) { struct cm_port *old_port = av->port; if (old_port == port) return; av->port = port; if (old_port) cm_device_put(old_port->cm_dev); if (port) kref_get(&port->cm_dev->kref); } static void cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc, struct rdma_ah_attr *ah_attr, struct cm_av *av) { cm_set_av_port(av, port); av->pkey_index = wc->pkey_index; rdma_move_ah_attr(&av->ah_attr, ah_attr); } static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, struct ib_grh *grh, struct cm_av *av) { cm_set_av_port(av, port); av->pkey_index = wc->pkey_index; return ib_init_ah_attr_from_wc(port->cm_dev->ib_device, port->port_num, wc, grh, &av->ah_attr); } static struct cm_port * get_cm_port_from_path(struct sa_path_rec *path, const struct ib_gid_attr *attr) { struct cm_device *cm_dev; struct cm_port *port = NULL; unsigned long flags; if (attr) { read_lock_irqsave(&cm.device_lock, flags); list_for_each_entry(cm_dev, &cm.device_list, list) { if (cm_dev->ib_device == attr->device) { port = cm_dev->port[attr->port_num - 1]; break; } } read_unlock_irqrestore(&cm.device_lock, flags); } else { /* SGID attribute can be NULL in following * conditions. * (a) Alternative path * (b) IB link layer without GRH * (c) LAP send messages */ read_lock_irqsave(&cm.device_lock, flags); list_for_each_entry(cm_dev, &cm.device_list, list) { attr = rdma_find_gid(cm_dev->ib_device, &path->sgid, sa_conv_pathrec_to_gid_type(path), NULL); if (!IS_ERR(attr)) { port = cm_dev->port[attr->port_num - 1]; break; } } read_unlock_irqrestore(&cm.device_lock, flags); if (port) rdma_put_gid_attr(attr); } return port; } static int cm_init_av_by_path(struct sa_path_rec *path, const struct ib_gid_attr *sgid_attr, struct cm_av *av) { struct rdma_ah_attr new_ah_attr; struct cm_device *cm_dev; struct cm_port *port; int ret; port = get_cm_port_from_path(path, sgid_attr); if (!port) return -EINVAL; cm_dev = port->cm_dev; ret = ib_find_cached_pkey(cm_dev->ib_device, port->port_num, be16_to_cpu(path->pkey), &av->pkey_index); if (ret) return ret; cm_set_av_port(av, port); /* * av->ah_attr might be initialized based on wc or during * request processing time which might have reference to sgid_attr. * So initialize a new ah_attr on stack. * If initialization fails, old ah_attr is used for sending any * responses. If initialization is successful, than new ah_attr * is used by overwriting the old one. So that right ah_attr * can be used to return an error response. */ ret = ib_init_ah_attr_from_path(cm_dev->ib_device, port->port_num, path, &new_ah_attr, sgid_attr); if (ret) return ret; av->timeout = path->packet_life_time + 1; rdma_move_ah_attr(&av->ah_attr, &new_ah_attr); return 0; } /* Move av created by cm_init_av_by_path(), so av.dgid is not moved */ static void cm_move_av_from_path(struct cm_av *dest, struct cm_av *src) { cm_set_av_port(dest, src->port); cm_set_av_port(src, NULL); dest->pkey_index = src->pkey_index; rdma_move_ah_attr(&dest->ah_attr, &src->ah_attr); dest->timeout = src->timeout; } static void cm_destroy_av(struct cm_av *av) { rdma_destroy_ah_attr(&av->ah_attr); cm_set_av_port(av, NULL); } static u32 cm_local_id(__be32 local_id) { return (__force u32) (local_id ^ cm.random_id_operand); } static struct cm_id_private *cm_acquire_id(__be32 local_id, __be32 remote_id) { struct cm_id_private *cm_id_priv; rcu_read_lock(); cm_id_priv = xa_load(&cm.local_id_table, cm_local_id(local_id)); if (!cm_id_priv || cm_id_priv->id.remote_id != remote_id || !refcount_inc_not_zero(&cm_id_priv->refcount)) cm_id_priv = NULL; rcu_read_unlock(); return cm_id_priv; } /* * Trivial helpers to strip endian annotation and compare; the * endianness doesn't actually matter since we just need a stable * order for the RB tree. */ static int be32_lt(__be32 a, __be32 b) { return (__force u32) a < (__force u32) b; } static int be32_gt(__be32 a, __be32 b) { return (__force u32) a > (__force u32) b; } static int be64_lt(__be64 a, __be64 b) { return (__force u64) a < (__force u64) b; } static int be64_gt(__be64 a, __be64 b) { return (__force u64) a > (__force u64) b; } /* * Inserts a new cm_id_priv into the listen_service_table. Returns cm_id_priv * if the new ID was inserted, NULL if it could not be inserted due to a * collision, or the existing cm_id_priv ready for shared usage. */ static struct cm_id_private *cm_insert_listen(struct cm_id_private *cm_id_priv, ib_cm_handler shared_handler) { struct rb_node **link = &cm.listen_service_table.rb_node; struct rb_node *parent = NULL; struct cm_id_private *cur_cm_id_priv; __be64 service_id = cm_id_priv->id.service_id; unsigned long flags; spin_lock_irqsave(&cm.lock, flags); while (*link) { parent = *link; cur_cm_id_priv = rb_entry(parent, struct cm_id_private, service_node); if (cm_id_priv->id.device < cur_cm_id_priv->id.device) link = &(*link)->rb_left; else if (cm_id_priv->id.device > cur_cm_id_priv->id.device) link = &(*link)->rb_right; else if (be64_lt(service_id, cur_cm_id_priv->id.service_id)) link = &(*link)->rb_left; else if (be64_gt(service_id, cur_cm_id_priv->id.service_id)) link = &(*link)->rb_right; else { /* * Sharing an ib_cm_id with different handlers is not * supported */ if (cur_cm_id_priv->id.cm_handler != shared_handler || cur_cm_id_priv->id.context || WARN_ON(!cur_cm_id_priv->id.cm_handler)) { spin_unlock_irqrestore(&cm.lock, flags); return NULL; } refcount_inc(&cur_cm_id_priv->refcount); cur_cm_id_priv->listen_sharecount++; spin_unlock_irqrestore(&cm.lock, flags); return cur_cm_id_priv; } } cm_id_priv->listen_sharecount++; rb_link_node(&cm_id_priv->service_node, parent, link); rb_insert_color(&cm_id_priv->service_node, &cm.listen_service_table); spin_unlock_irqrestore(&cm.lock, flags); return cm_id_priv; } static struct cm_id_private *cm_find_listen(struct ib_device *device, __be64 service_id) { struct rb_node *node = cm.listen_service_table.rb_node; struct cm_id_private *cm_id_priv; while (node) { cm_id_priv = rb_entry(node, struct cm_id_private, service_node); if (device < cm_id_priv->id.device) node = node->rb_left; else if (device > cm_id_priv->id.device) node = node->rb_right; else if (be64_lt(service_id, cm_id_priv->id.service_id)) node = node->rb_left; else if (be64_gt(service_id, cm_id_priv->id.service_id)) node = node->rb_right; else { refcount_inc(&cm_id_priv->refcount); return cm_id_priv; } } return NULL; } static struct cm_timewait_info * cm_insert_remote_id(struct cm_timewait_info *timewait_info) { struct rb_node **link = &cm.remote_id_table.rb_node; struct rb_node *parent = NULL; struct cm_timewait_info *cur_timewait_info; __be64 remote_ca_guid = timewait_info->remote_ca_guid; __be32 remote_id = timewait_info->work.remote_id; while (*link) { parent = *link; cur_timewait_info = rb_entry(parent, struct cm_timewait_info, remote_id_node); if (be32_lt(remote_id, cur_timewait_info->work.remote_id)) link = &(*link)->rb_left; else if (be32_gt(remote_id, cur_timewait_info->work.remote_id)) link = &(*link)->rb_right; else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_left; else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_right; else return cur_timewait_info; } timewait_info->inserted_remote_id = 1; rb_link_node(&timewait_info->remote_id_node, parent, link); rb_insert_color(&timewait_info->remote_id_node, &cm.remote_id_table); return NULL; } static struct cm_id_private *cm_find_remote_id(__be64 remote_ca_guid, __be32 remote_id) { struct rb_node *node = cm.remote_id_table.rb_node; struct cm_timewait_info *timewait_info; struct cm_id_private *res = NULL; spin_lock_irq(&cm.lock); while (node) { timewait_info = rb_entry(node, struct cm_timewait_info, remote_id_node); if (be32_lt(remote_id, timewait_info->work.remote_id)) node = node->rb_left; else if (be32_gt(remote_id, timewait_info->work.remote_id)) node = node->rb_right; else if (be64_lt(remote_ca_guid, timewait_info->remote_ca_guid)) node = node->rb_left; else if (be64_gt(remote_ca_guid, timewait_info->remote_ca_guid)) node = node->rb_right; else { res = cm_acquire_id(timewait_info->work.local_id, timewait_info->work.remote_id); break; } } spin_unlock_irq(&cm.lock); return res; } static struct cm_timewait_info * cm_insert_remote_qpn(struct cm_timewait_info *timewait_info) { struct rb_node **link = &cm.remote_qp_table.rb_node; struct rb_node *parent = NULL; struct cm_timewait_info *cur_timewait_info; __be64 remote_ca_guid = timewait_info->remote_ca_guid; __be32 remote_qpn = timewait_info->remote_qpn; while (*link) { parent = *link; cur_timewait_info = rb_entry(parent, struct cm_timewait_info, remote_qp_node); if (be32_lt(remote_qpn, cur_timewait_info->remote_qpn)) link = &(*link)->rb_left; else if (be32_gt(remote_qpn, cur_timewait_info->remote_qpn)) link = &(*link)->rb_right; else if (be64_lt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_left; else if (be64_gt(remote_ca_guid, cur_timewait_info->remote_ca_guid)) link = &(*link)->rb_right; else return cur_timewait_info; } timewait_info->inserted_remote_qp = 1; rb_link_node(&timewait_info->remote_qp_node, parent, link); rb_insert_color(&timewait_info->remote_qp_node, &cm.remote_qp_table); return NULL; } static struct cm_id_private * cm_insert_remote_sidr(struct cm_id_private *cm_id_priv) { struct rb_node **link = &cm.remote_sidr_table.rb_node; struct rb_node *parent = NULL; struct cm_id_private *cur_cm_id_priv; __be32 remote_id = cm_id_priv->id.remote_id; while (*link) { parent = *link; cur_cm_id_priv = rb_entry(parent, struct cm_id_private, sidr_id_node); if (be32_lt(remote_id, cur_cm_id_priv->id.remote_id)) link = &(*link)->rb_left; else if (be32_gt(remote_id, cur_cm_id_priv->id.remote_id)) link = &(*link)->rb_right; else { if (cur_cm_id_priv->sidr_slid < cm_id_priv->sidr_slid) link = &(*link)->rb_left; else if (cur_cm_id_priv->sidr_slid > cm_id_priv->sidr_slid) link = &(*link)->rb_right; else return cur_cm_id_priv; } } rb_link_node(&cm_id_priv->sidr_id_node, parent, link); rb_insert_color(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); return NULL; } static struct cm_id_private *cm_alloc_id_priv(struct ib_device *device, ib_cm_handler cm_handler, void *context) { struct cm_id_private *cm_id_priv; u32 id; int ret; cm_id_priv = kzalloc(sizeof *cm_id_priv, GFP_KERNEL); if (!cm_id_priv) return ERR_PTR(-ENOMEM); cm_id_priv->id.state = IB_CM_IDLE; cm_id_priv->id.device = device; cm_id_priv->id.cm_handler = cm_handler; cm_id_priv->id.context = context; cm_id_priv->id.remote_cm_qpn = 1; RB_CLEAR_NODE(&cm_id_priv->service_node); RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); spin_lock_init(&cm_id_priv->lock); init_completion(&cm_id_priv->comp); INIT_LIST_HEAD(&cm_id_priv->work_list); atomic_set(&cm_id_priv->work_count, -1); refcount_set(&cm_id_priv->refcount, 1); ret = xa_alloc_cyclic(&cm.local_id_table, &id, NULL, xa_limit_32b, &cm.local_id_next, GFP_KERNEL); if (ret < 0) goto error; cm_id_priv->id.local_id = (__force __be32)id ^ cm.random_id_operand; return cm_id_priv; error: kfree(cm_id_priv); return ERR_PTR(ret); } /* * Make the ID visible to the MAD handlers and other threads that use the * xarray. */ static void cm_finalize_id(struct cm_id_private *cm_id_priv) { xa_store(&cm.local_id_table, cm_local_id(cm_id_priv->id.local_id), cm_id_priv, GFP_ATOMIC); } struct ib_cm_id *ib_create_cm_id(struct ib_device *device, ib_cm_handler cm_handler, void *context) { struct cm_id_private *cm_id_priv; cm_id_priv = cm_alloc_id_priv(device, cm_handler, context); if (IS_ERR(cm_id_priv)) return ERR_CAST(cm_id_priv); cm_finalize_id(cm_id_priv); return &cm_id_priv->id; } EXPORT_SYMBOL(ib_create_cm_id); static struct cm_work *cm_dequeue_work(struct cm_id_private *cm_id_priv) { struct cm_work *work; if (list_empty(&cm_id_priv->work_list)) return NULL; work = list_entry(cm_id_priv->work_list.next, struct cm_work, list); list_del(&work->list); return work; } static void cm_free_work(struct cm_work *work) { if (work->mad_recv_wc) ib_free_recv_mad(work->mad_recv_wc); kfree(work); } static void cm_queue_work_unlock(struct cm_id_private *cm_id_priv, struct cm_work *work) __releases(&cm_id_priv->lock) { bool immediate; /* * To deliver the event to the user callback we have the drop the * spinlock, however, we need to ensure that the user callback is single * threaded and receives events in the temporal order. If there are * already events being processed then thread new events onto a list, * the thread currently processing will pick them up. */ immediate = atomic_inc_and_test(&cm_id_priv->work_count); if (!immediate) { list_add_tail(&work->list, &cm_id_priv->work_list); /* * This routine always consumes incoming reference. Once queued * to the work_list then a reference is held by the thread * currently running cm_process_work() and this reference is not * needed. */ cm_deref_id(cm_id_priv); } spin_unlock_irq(&cm_id_priv->lock); if (immediate) cm_process_work(cm_id_priv, work); } static inline int cm_convert_to_ms(int iba_time) { /* approximate conversion to ms from 4.096us x 2^iba_time */ return 1 << max(iba_time - 8, 0); } /* * calculate: 4.096x2^ack_timeout = 4.096x2^ack_delay + 2x4.096x2^life_time * Because of how ack_timeout is stored, adding one doubles the timeout. * To avoid large timeouts, select the max(ack_delay, life_time + 1), and * increment it (round up) only if the other is within 50%. */ static u8 cm_ack_timeout(u8 ca_ack_delay, u8 packet_life_time) { int ack_timeout = packet_life_time + 1; if (ack_timeout >= ca_ack_delay) ack_timeout += (ca_ack_delay >= (ack_timeout - 1)); else ack_timeout = ca_ack_delay + (ack_timeout >= (ca_ack_delay - 1)); return min(31, ack_timeout); } static void cm_remove_remote(struct cm_id_private *cm_id_priv) { struct cm_timewait_info *timewait_info = cm_id_priv->timewait_info; if (timewait_info->inserted_remote_id) { rb_erase(&timewait_info->remote_id_node, &cm.remote_id_table); timewait_info->inserted_remote_id = 0; } if (timewait_info->inserted_remote_qp) { rb_erase(&timewait_info->remote_qp_node, &cm.remote_qp_table); timewait_info->inserted_remote_qp = 0; } } static struct cm_timewait_info *cm_create_timewait_info(__be32 local_id) { struct cm_timewait_info *timewait_info; timewait_info = kzalloc(sizeof *timewait_info, GFP_KERNEL); if (!timewait_info) return ERR_PTR(-ENOMEM); timewait_info->work.local_id = local_id; INIT_DELAYED_WORK(&timewait_info->work.work, cm_work_handler); timewait_info->work.cm_event.event = IB_CM_TIMEWAIT_EXIT; return timewait_info; } static void cm_enter_timewait(struct cm_id_private *cm_id_priv) { int wait_time; unsigned long flags; struct cm_device *cm_dev; lockdep_assert_held(&cm_id_priv->lock); cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); if (!cm_dev) return; spin_lock_irqsave(&cm.lock, flags); cm_remove_remote(cm_id_priv); list_add_tail(&cm_id_priv->timewait_info->list, &cm.timewait_list); spin_unlock_irqrestore(&cm.lock, flags); /* * The cm_id could be destroyed by the user before we exit timewait. * To protect against this, we search for the cm_id after exiting * timewait before notifying the user that we've exited timewait. */ cm_id_priv->id.state = IB_CM_TIMEWAIT; wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); /* Check if the device started its remove_one */ spin_lock_irqsave(&cm.lock, flags); if (!cm_dev->going_down) queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, msecs_to_jiffies(wait_time)); spin_unlock_irqrestore(&cm.lock, flags); /* * The timewait_info is converted into a work and gets freed during * cm_free_work() in cm_timewait_handler(). */ BUILD_BUG_ON(offsetof(struct cm_timewait_info, work) != 0); cm_id_priv->timewait_info = NULL; } static void cm_reset_to_idle(struct cm_id_private *cm_id_priv) { unsigned long flags; lockdep_assert_held(&cm_id_priv->lock); cm_id_priv->id.state = IB_CM_IDLE; if (cm_id_priv->timewait_info) { spin_lock_irqsave(&cm.lock, flags); cm_remove_remote(cm_id_priv); spin_unlock_irqrestore(&cm.lock, flags); kfree(cm_id_priv->timewait_info); cm_id_priv->timewait_info = NULL; } } static noinline void cm_destroy_id_wait_timeout(struct ib_cm_id *cm_id, enum ib_cm_state old_state) { struct cm_id_private *cm_id_priv; cm_id_priv = container_of(cm_id, struct cm_id_private, id); pr_err_ratelimited("%s: cm_id=%p timed out. state %d -> %d, refcnt=%d\n", __func__, cm_id, old_state, cm_id->state, refcount_read(&cm_id_priv->refcount)); } static void cm_destroy_id(struct ib_cm_id *cm_id, int err) { struct cm_id_private *cm_id_priv; enum ib_cm_state old_state; struct cm_work *work; int ret; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irq(&cm_id_priv->lock); old_state = cm_id->state; retest: switch (cm_id->state) { case IB_CM_LISTEN: spin_lock(&cm.lock); if (--cm_id_priv->listen_sharecount > 0) { /* The id is still shared. */ WARN_ON(refcount_read(&cm_id_priv->refcount) == 1); spin_unlock(&cm.lock); spin_unlock_irq(&cm_id_priv->lock); cm_deref_id(cm_id_priv); return; } cm_id->state = IB_CM_IDLE; rb_erase(&cm_id_priv->service_node, &cm.listen_service_table); RB_CLEAR_NODE(&cm_id_priv->service_node); spin_unlock(&cm.lock); break; case IB_CM_SIDR_REQ_SENT: cm_id->state = IB_CM_IDLE; ib_cancel_mad(cm_id_priv->msg); break; case IB_CM_SIDR_REQ_RCVD: cm_send_sidr_rep_locked(cm_id_priv, &(struct ib_cm_sidr_rep_param){ .status = IB_SIDR_REJECT }); /* cm_send_sidr_rep_locked will not move to IDLE if it fails */ cm_id->state = IB_CM_IDLE; break; case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: ib_cancel_mad(cm_id_priv->msg); cm_send_rej_locked(cm_id_priv, IB_CM_REJ_TIMEOUT, &cm_id_priv->id.device->node_guid, sizeof(cm_id_priv->id.device->node_guid), NULL, 0); break; case IB_CM_REQ_RCVD: if (err == -ENOMEM) { /* Do not reject to allow future retries. */ cm_reset_to_idle(cm_id_priv); } else { cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, NULL, 0); } break; case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: ib_cancel_mad(cm_id_priv->msg); cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, NULL, 0); goto retest; case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: cm_send_rej_locked(cm_id_priv, IB_CM_REJ_CONSUMER_DEFINED, NULL, 0, NULL, 0); break; case IB_CM_ESTABLISHED: if (cm_id_priv->qp_type == IB_QPT_XRC_TGT) { cm_id->state = IB_CM_IDLE; break; } cm_issue_dreq(cm_id_priv); cm_enter_timewait(cm_id_priv); goto retest; case IB_CM_DREQ_SENT: ib_cancel_mad(cm_id_priv->msg); cm_enter_timewait(cm_id_priv); goto retest; case IB_CM_DREQ_RCVD: cm_send_drep_locked(cm_id_priv, NULL, 0); WARN_ON(cm_id->state != IB_CM_TIMEWAIT); goto retest; case IB_CM_TIMEWAIT: /* * The cm_acquire_id in cm_timewait_handler will stop working * once we do xa_erase below, so just move to idle here for * consistency. */ cm_id->state = IB_CM_IDLE; break; case IB_CM_IDLE: break; } WARN_ON(cm_id->state != IB_CM_IDLE); spin_lock(&cm.lock); /* Required for cleanup paths related cm_req_handler() */ if (cm_id_priv->timewait_info) { cm_remove_remote(cm_id_priv); kfree(cm_id_priv->timewait_info); cm_id_priv->timewait_info = NULL; } WARN_ON(cm_id_priv->listen_sharecount); WARN_ON(!RB_EMPTY_NODE(&cm_id_priv->service_node)); if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); spin_unlock(&cm.lock); spin_unlock_irq(&cm_id_priv->lock); xa_erase(&cm.local_id_table, cm_local_id(cm_id->local_id)); cm_deref_id(cm_id_priv); do { ret = wait_for_completion_timeout(&cm_id_priv->comp, msecs_to_jiffies( CM_DESTROY_ID_WAIT_TIMEOUT)); if (!ret) /* timeout happened */ cm_destroy_id_wait_timeout(cm_id, old_state); } while (!ret); while ((work = cm_dequeue_work(cm_id_priv)) != NULL) cm_free_work(work); cm_destroy_av(&cm_id_priv->av); cm_destroy_av(&cm_id_priv->alt_av); kfree(cm_id_priv->private_data); kfree_rcu(cm_id_priv, rcu); } void ib_destroy_cm_id(struct ib_cm_id *cm_id) { cm_destroy_id(cm_id, 0); } EXPORT_SYMBOL(ib_destroy_cm_id); static int cm_init_listen(struct cm_id_private *cm_id_priv, __be64 service_id) { if ((service_id & IB_SERVICE_ID_AGN_MASK) == IB_CM_ASSIGN_SERVICE_ID && (service_id != IB_CM_ASSIGN_SERVICE_ID)) return -EINVAL; if (service_id == IB_CM_ASSIGN_SERVICE_ID) cm_id_priv->id.service_id = cpu_to_be64(cm.listen_service_id++); else cm_id_priv->id.service_id = service_id; return 0; } /** * ib_cm_listen - Initiates listening on the specified service ID for * connection and service ID resolution requests. * @cm_id: Connection identifier associated with the listen request. * @service_id: Service identifier matched against incoming connection * and service ID resolution requests. The service ID should be specified * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will * assign a service ID to the caller. */ int ib_cm_listen(struct ib_cm_id *cm_id, __be64 service_id) { struct cm_id_private *cm_id_priv = container_of(cm_id, struct cm_id_private, id); unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id_priv->id.state != IB_CM_IDLE) { ret = -EINVAL; goto out; } ret = cm_init_listen(cm_id_priv, service_id); if (ret) goto out; if (!cm_insert_listen(cm_id_priv, NULL)) { ret = -EBUSY; goto out; } cm_id_priv->id.state = IB_CM_LISTEN; ret = 0; out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_cm_listen); /** * ib_cm_insert_listen - Create a new listening ib_cm_id and listen on * the given service ID. * * If there's an existing ID listening on that same device and service ID, * return it. * * @device: Device associated with the cm_id. All related communication will * be associated with the specified device. * @cm_handler: Callback invoked to notify the user of CM events. * @service_id: Service identifier matched against incoming connection * and service ID resolution requests. The service ID should be specified * network-byte order. If set to IB_CM_ASSIGN_SERVICE_ID, the CM will * assign a service ID to the caller. * * Callers should call ib_destroy_cm_id when done with the listener ID. */ struct ib_cm_id *ib_cm_insert_listen(struct ib_device *device, ib_cm_handler cm_handler, __be64 service_id) { struct cm_id_private *listen_id_priv; struct cm_id_private *cm_id_priv; int err = 0; /* Create an ID in advance, since the creation may sleep */ cm_id_priv = cm_alloc_id_priv(device, cm_handler, NULL); if (IS_ERR(cm_id_priv)) return ERR_CAST(cm_id_priv); err = cm_init_listen(cm_id_priv, service_id); if (err) { ib_destroy_cm_id(&cm_id_priv->id); return ERR_PTR(err); } spin_lock_irq(&cm_id_priv->lock); listen_id_priv = cm_insert_listen(cm_id_priv, cm_handler); if (listen_id_priv != cm_id_priv) { spin_unlock_irq(&cm_id_priv->lock); ib_destroy_cm_id(&cm_id_priv->id); if (!listen_id_priv) return ERR_PTR(-EINVAL); return &listen_id_priv->id; } cm_id_priv->id.state = IB_CM_LISTEN; spin_unlock_irq(&cm_id_priv->lock); /* * A listen ID does not need to be in the xarray since it does not * receive mads, is not placed in the remote_id or remote_qpn rbtree, * and does not enter timewait. */ return &cm_id_priv->id; } EXPORT_SYMBOL(ib_cm_insert_listen); static __be64 cm_form_tid(struct cm_id_private *cm_id_priv) { u64 hi_tid = 0, low_tid; lockdep_assert_held(&cm_id_priv->lock); low_tid = (u64)cm_id_priv->id.local_id; if (!cm_id_priv->av.port) return cpu_to_be64(low_tid); read_lock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); if (cm_id_priv->av.port->mad_agent) hi_tid = ((u64)cm_id_priv->av.port->mad_agent->hi_tid) << 32; read_unlock(&cm_id_priv->av.port->cm_dev->mad_agent_lock); return cpu_to_be64(hi_tid | low_tid); } static void cm_format_mad_hdr(struct ib_mad_hdr *hdr, __be16 attr_id, __be64 tid) { hdr->base_version = IB_MGMT_BASE_VERSION; hdr->mgmt_class = IB_MGMT_CLASS_CM; hdr->class_version = IB_CM_CLASS_VERSION; hdr->method = IB_MGMT_METHOD_SEND; hdr->attr_id = attr_id; hdr->tid = tid; } static void cm_format_mad_ece_hdr(struct ib_mad_hdr *hdr, __be16 attr_id, __be64 tid, u32 attr_mod) { cm_format_mad_hdr(hdr, attr_id, tid); hdr->attr_mod = cpu_to_be32(attr_mod); } static void cm_format_req(struct cm_req_msg *req_msg, struct cm_id_private *cm_id_priv, struct ib_cm_req_param *param) { struct sa_path_rec *pri_path = param->primary_path; struct sa_path_rec *alt_path = param->alternate_path; bool pri_ext = false; __be16 lid; if (pri_path->rec_type == SA_PATH_REC_TYPE_OPA) pri_ext = opa_is_extended_lid(pri_path->opa.dlid, pri_path->opa.slid); cm_format_mad_ece_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, cm_form_tid(cm_id_priv), param->ece.attr_mod); IBA_SET(CM_REQ_LOCAL_COMM_ID, req_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_REQ_SERVICE_ID, req_msg, be64_to_cpu(param->service_id)); IBA_SET(CM_REQ_LOCAL_CA_GUID, req_msg, be64_to_cpu(cm_id_priv->id.device->node_guid)); IBA_SET(CM_REQ_LOCAL_QPN, req_msg, param->qp_num); IBA_SET(CM_REQ_INITIATOR_DEPTH, req_msg, param->initiator_depth); IBA_SET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg, param->remote_cm_response_timeout); cm_req_set_qp_type(req_msg, param->qp_type); IBA_SET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg, param->flow_control); IBA_SET(CM_REQ_STARTING_PSN, req_msg, param->starting_psn); IBA_SET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg, param->local_cm_response_timeout); IBA_SET(CM_REQ_PARTITION_KEY, req_msg, be16_to_cpu(param->primary_path->pkey)); IBA_SET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg, param->primary_path->mtu); IBA_SET(CM_REQ_MAX_CM_RETRIES, req_msg, param->max_cm_retries); if (param->qp_type != IB_QPT_XRC_INI) { IBA_SET(CM_REQ_RESPONDER_RESOURCES, req_msg, param->responder_resources); IBA_SET(CM_REQ_RETRY_COUNT, req_msg, param->retry_count); IBA_SET(CM_REQ_RNR_RETRY_COUNT, req_msg, param->rnr_retry_count); IBA_SET(CM_REQ_SRQ, req_msg, param->srq); } *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) = pri_path->sgid; *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) = pri_path->dgid; if (pri_ext) { IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg) ->global.interface_id = OPA_MAKE_ID(be32_to_cpu(pri_path->opa.slid)); IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg) ->global.interface_id = OPA_MAKE_ID(be32_to_cpu(pri_path->opa.dlid)); } if (pri_path->hop_limit <= 1) { IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, be16_to_cpu(pri_ext ? 0 : htons(ntohl(sa_path_get_slid( pri_path))))); IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, be16_to_cpu(pri_ext ? 0 : htons(ntohl(sa_path_get_dlid( pri_path))))); } else { if (param->primary_path_inbound) { lid = param->primary_path_inbound->ib.dlid; IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, be16_to_cpu(lid)); } else IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, be16_to_cpu(IB_LID_PERMISSIVE)); /* Work-around until there's a way to obtain remote LID info */ IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, be16_to_cpu(IB_LID_PERMISSIVE)); } IBA_SET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg, be32_to_cpu(pri_path->flow_label)); IBA_SET(CM_REQ_PRIMARY_PACKET_RATE, req_msg, pri_path->rate); IBA_SET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg, pri_path->traffic_class); IBA_SET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg, pri_path->hop_limit); IBA_SET(CM_REQ_PRIMARY_SL, req_msg, pri_path->sl); IBA_SET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg, (pri_path->hop_limit <= 1)); IBA_SET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, pri_path->packet_life_time)); if (alt_path) { bool alt_ext = false; if (alt_path->rec_type == SA_PATH_REC_TYPE_OPA) alt_ext = opa_is_extended_lid(alt_path->opa.dlid, alt_path->opa.slid); *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) = alt_path->sgid; *IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) = alt_path->dgid; if (alt_ext) { IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg) ->global.interface_id = OPA_MAKE_ID(be32_to_cpu(alt_path->opa.slid)); IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg) ->global.interface_id = OPA_MAKE_ID(be32_to_cpu(alt_path->opa.dlid)); } if (alt_path->hop_limit <= 1) { IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, be16_to_cpu( alt_ext ? 0 : htons(ntohl(sa_path_get_slid( alt_path))))); IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, be16_to_cpu( alt_ext ? 0 : htons(ntohl(sa_path_get_dlid( alt_path))))); } else { IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, be16_to_cpu(IB_LID_PERMISSIVE)); IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, be16_to_cpu(IB_LID_PERMISSIVE)); } IBA_SET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg, be32_to_cpu(alt_path->flow_label)); IBA_SET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg, alt_path->rate); IBA_SET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg, alt_path->traffic_class); IBA_SET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg, alt_path->hop_limit); IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, alt_path->sl); IBA_SET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg, (alt_path->hop_limit <= 1)); IBA_SET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg, cm_ack_timeout(cm_id_priv->av.port->cm_dev->ack_delay, alt_path->packet_life_time)); } IBA_SET(CM_REQ_VENDOR_ID, req_msg, param->ece.vendor_id); if (param->private_data && param->private_data_len) IBA_SET_MEM(CM_REQ_PRIVATE_DATA, req_msg, param->private_data, param->private_data_len); } static int cm_validate_req_param(struct ib_cm_req_param *param) { if (!param->primary_path) return -EINVAL; if (param->qp_type != IB_QPT_RC && param->qp_type != IB_QPT_UC && param->qp_type != IB_QPT_XRC_INI) return -EINVAL; if (param->private_data && param->private_data_len > IB_CM_REQ_PRIVATE_DATA_SIZE) return -EINVAL; if (param->alternate_path && (param->alternate_path->pkey != param->primary_path->pkey || param->alternate_path->mtu != param->primary_path->mtu)) return -EINVAL; return 0; } int ib_send_cm_req(struct ib_cm_id *cm_id, struct ib_cm_req_param *param) { struct cm_av av = {}, alt_av = {}; struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; struct cm_req_msg *req_msg; unsigned long flags; int ret; ret = cm_validate_req_param(param); if (ret) return ret; /* Verify that we're not in timewait. */ cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_IDLE || WARN_ON(cm_id_priv->timewait_info)) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); return -EINVAL; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> id.local_id); if (IS_ERR(cm_id_priv->timewait_info)) { ret = PTR_ERR(cm_id_priv->timewait_info); cm_id_priv->timewait_info = NULL; return ret; } ret = cm_init_av_by_path(param->primary_path, param->ppath_sgid_attr, &av); if (ret) return ret; if (param->alternate_path) { ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av); if (ret) { cm_destroy_av(&av); return ret; } } cm_id->service_id = param->service_id; cm_id_priv->timeout_ms = cm_convert_to_ms( param->primary_path->packet_life_time) * 2 + cm_convert_to_ms( param->remote_cm_response_timeout); cm_id_priv->max_cm_retries = param->max_cm_retries; cm_id_priv->initiator_depth = param->initiator_depth; cm_id_priv->responder_resources = param->responder_resources; cm_id_priv->retry_count = param->retry_count; cm_id_priv->path_mtu = param->primary_path->mtu; cm_id_priv->pkey = param->primary_path->pkey; cm_id_priv->qp_type = param->qp_type; spin_lock_irqsave(&cm_id_priv->lock, flags); cm_move_av_from_path(&cm_id_priv->av, &av); if (param->primary_path_outbound) cm_id_priv->av.dlid_datapath = be16_to_cpu(param->primary_path_outbound->ib.dlid); if (param->alternate_path) cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av); msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_REQ_SENT); if (IS_ERR(msg)) { ret = PTR_ERR(msg); goto out_unlock; } req_msg = (struct cm_req_msg *)msg->mad; cm_format_req(req_msg, cm_id_priv, param); cm_id_priv->tid = req_msg->hdr.tid; cm_id_priv->local_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg)); cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg)); trace_icm_send_req(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) goto out_free; BUG_ON(cm_id->state != IB_CM_IDLE); cm_id->state = IB_CM_REQ_SENT; spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; out_free: cm_free_priv_msg(msg); out_unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_req); static int cm_issue_rej(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc, enum ib_cm_rej_reason reason, enum cm_msg_response msg_rejected, void *ari, u8 ari_length) { struct ib_mad_send_buf *msg = NULL; struct cm_rej_msg *rej_msg, *rcv_msg; int ret; ret = cm_alloc_response_msg(port, mad_recv_wc, false, &msg); if (ret) return ret; /* We just need common CM header information. Cast to any message. */ rcv_msg = (struct cm_rej_msg *) mad_recv_wc->recv_buf.mad; rej_msg = (struct cm_rej_msg *) msg->mad; cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, rcv_msg->hdr.tid); IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg, IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg)); IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg)); IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, msg_rejected); IBA_SET(CM_REJ_REASON, rej_msg, reason); if (ari && ari_length) { IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length); IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length); } trace_icm_issue_rej( IBA_GET(CM_REJ_LOCAL_COMM_ID, rcv_msg), IBA_GET(CM_REJ_REMOTE_COMM_ID, rcv_msg)); ret = ib_post_send_mad(msg, NULL); if (ret) cm_free_msg(msg); return ret; } static bool cm_req_has_alt_path(struct cm_req_msg *req_msg) { return ((cpu_to_be16( IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg))) || (ib_is_opa_gid(IBA_GET_MEM_PTR(CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg)))); } static void cm_path_set_rec_type(struct ib_device *ib_device, u32 port_num, struct sa_path_rec *path, union ib_gid *gid) { if (ib_is_opa_gid(gid) && rdma_cap_opa_ah(ib_device, port_num)) path->rec_type = SA_PATH_REC_TYPE_OPA; else path->rec_type = SA_PATH_REC_TYPE_IB; } static void cm_format_path_lid_from_req(struct cm_req_msg *req_msg, struct sa_path_rec *primary_path, struct sa_path_rec *alt_path, struct ib_wc *wc) { u32 lid; if (primary_path->rec_type != SA_PATH_REC_TYPE_OPA) { sa_path_set_dlid(primary_path, wc->slid); sa_path_set_slid(primary_path, IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg)); } else { lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)); sa_path_set_dlid(primary_path, lid); lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg)); sa_path_set_slid(primary_path, lid); } if (!cm_req_has_alt_path(req_msg)) return; if (alt_path->rec_type != SA_PATH_REC_TYPE_OPA) { sa_path_set_dlid(alt_path, IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg)); sa_path_set_slid(alt_path, IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg)); } else { lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg)); sa_path_set_dlid(alt_path, lid); lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg)); sa_path_set_slid(alt_path, lid); } } static void cm_format_paths_from_req(struct cm_req_msg *req_msg, struct sa_path_rec *primary_path, struct sa_path_rec *alt_path, struct ib_wc *wc) { primary_path->dgid = *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg); primary_path->sgid = *IBA_GET_MEM_PTR(CM_REQ_PRIMARY_REMOTE_PORT_GID, req_msg); primary_path->flow_label = cpu_to_be32(IBA_GET(CM_REQ_PRIMARY_FLOW_LABEL, req_msg)); primary_path->hop_limit = IBA_GET(CM_REQ_PRIMARY_HOP_LIMIT, req_msg); primary_path->traffic_class = IBA_GET(CM_REQ_PRIMARY_TRAFFIC_CLASS, req_msg); primary_path->reversible = 1; primary_path->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); primary_path->sl = IBA_GET(CM_REQ_PRIMARY_SL, req_msg); primary_path->mtu_selector = IB_SA_EQ; primary_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); primary_path->rate_selector = IB_SA_EQ; primary_path->rate = IBA_GET(CM_REQ_PRIMARY_PACKET_RATE, req_msg); primary_path->packet_life_time_selector = IB_SA_EQ; primary_path->packet_life_time = IBA_GET(CM_REQ_PRIMARY_LOCAL_ACK_TIMEOUT, req_msg); primary_path->packet_life_time -= (primary_path->packet_life_time > 0); primary_path->service_id = cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); if (sa_path_is_roce(primary_path)) primary_path->roce.route_resolved = false; if (cm_req_has_alt_path(req_msg)) { alt_path->dgid = *IBA_GET_MEM_PTR( CM_REQ_ALTERNATE_LOCAL_PORT_GID, req_msg); alt_path->sgid = *IBA_GET_MEM_PTR( CM_REQ_ALTERNATE_REMOTE_PORT_GID, req_msg); alt_path->flow_label = cpu_to_be32( IBA_GET(CM_REQ_ALTERNATE_FLOW_LABEL, req_msg)); alt_path->hop_limit = IBA_GET(CM_REQ_ALTERNATE_HOP_LIMIT, req_msg); alt_path->traffic_class = IBA_GET(CM_REQ_ALTERNATE_TRAFFIC_CLASS, req_msg); alt_path->reversible = 1; alt_path->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); alt_path->sl = IBA_GET(CM_REQ_ALTERNATE_SL, req_msg); alt_path->mtu_selector = IB_SA_EQ; alt_path->mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); alt_path->rate_selector = IB_SA_EQ; alt_path->rate = IBA_GET(CM_REQ_ALTERNATE_PACKET_RATE, req_msg); alt_path->packet_life_time_selector = IB_SA_EQ; alt_path->packet_life_time = IBA_GET(CM_REQ_ALTERNATE_LOCAL_ACK_TIMEOUT, req_msg); alt_path->packet_life_time -= (alt_path->packet_life_time > 0); alt_path->service_id = cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); if (sa_path_is_roce(alt_path)) alt_path->roce.route_resolved = false; } cm_format_path_lid_from_req(req_msg, primary_path, alt_path, wc); } static u16 cm_get_bth_pkey(struct cm_work *work) { struct ib_device *ib_dev = work->port->cm_dev->ib_device; u32 port_num = work->port->port_num; u16 pkey_index = work->mad_recv_wc->wc->pkey_index; u16 pkey; int ret; ret = ib_get_cached_pkey(ib_dev, port_num, pkey_index, &pkey); if (ret) { dev_warn_ratelimited(&ib_dev->dev, "ib_cm: Couldn't retrieve pkey for incoming request (port %u, pkey index %u). %d\n", port_num, pkey_index, ret); return 0; } return pkey; } /** * cm_opa_to_ib_sgid - Convert OPA SGID to IB SGID * ULPs (such as IPoIB) do not understand OPA GIDs and will * reject them as the local_gid will not match the sgid. Therefore, * change the pathrec's SGID to an IB SGID. * * @work: Work completion * @path: Path record */ static void cm_opa_to_ib_sgid(struct cm_work *work, struct sa_path_rec *path) { struct ib_device *dev = work->port->cm_dev->ib_device; u32 port_num = work->port->port_num; if (rdma_cap_opa_ah(dev, port_num) && (ib_is_opa_gid(&path->sgid))) { union ib_gid sgid; if (rdma_query_gid(dev, port_num, 0, &sgid)) { dev_warn(&dev->dev, "Error updating sgid in CM request\n"); return; } path->sgid = sgid; } } static void cm_format_req_event(struct cm_work *work, struct cm_id_private *cm_id_priv, struct ib_cm_id *listen_id) { struct cm_req_msg *req_msg; struct ib_cm_req_event_param *param; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.req_rcvd; param->listen_id = listen_id; param->bth_pkey = cm_get_bth_pkey(work); param->port = cm_id_priv->av.port->port_num; param->primary_path = &work->path[0]; cm_opa_to_ib_sgid(work, param->primary_path); if (cm_req_has_alt_path(req_msg)) { param->alternate_path = &work->path[1]; cm_opa_to_ib_sgid(work, param->alternate_path); } else { param->alternate_path = NULL; } param->remote_ca_guid = cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg)); param->remote_qkey = IBA_GET(CM_REQ_LOCAL_Q_KEY, req_msg); param->remote_qpn = IBA_GET(CM_REQ_LOCAL_QPN, req_msg); param->qp_type = cm_req_get_qp_type(req_msg); param->starting_psn = IBA_GET(CM_REQ_STARTING_PSN, req_msg); param->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg); param->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg); param->local_cm_response_timeout = IBA_GET(CM_REQ_REMOTE_CM_RESPONSE_TIMEOUT, req_msg); param->flow_control = IBA_GET(CM_REQ_END_TO_END_FLOW_CONTROL, req_msg); param->remote_cm_response_timeout = IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg); param->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg); param->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg); param->srq = IBA_GET(CM_REQ_SRQ, req_msg); param->ppath_sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; param->ece.vendor_id = IBA_GET(CM_REQ_VENDOR_ID, req_msg); param->ece.attr_mod = be32_to_cpu(req_msg->hdr.attr_mod); work->cm_event.private_data = IBA_GET_MEM_PTR(CM_REQ_PRIVATE_DATA, req_msg); } static void cm_process_work(struct cm_id_private *cm_id_priv, struct cm_work *work) { int ret; /* We will typically only have the current event to report. */ ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); cm_free_work(work); while (!ret && !atomic_add_negative(-1, &cm_id_priv->work_count)) { spin_lock_irq(&cm_id_priv->lock); work = cm_dequeue_work(cm_id_priv); spin_unlock_irq(&cm_id_priv->lock); if (!work) return; ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); cm_free_work(work); } cm_deref_id(cm_id_priv); if (ret) cm_destroy_id(&cm_id_priv->id, ret); } static void cm_format_mra(struct cm_mra_msg *mra_msg, struct cm_id_private *cm_id_priv, enum cm_msg_response msg_mraed, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&mra_msg->hdr, CM_MRA_ATTR_ID, cm_id_priv->tid); IBA_SET(CM_MRA_MESSAGE_MRAED, mra_msg, msg_mraed); IBA_SET(CM_MRA_LOCAL_COMM_ID, mra_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_MRA_REMOTE_COMM_ID, mra_msg, be32_to_cpu(cm_id_priv->id.remote_id)); IBA_SET(CM_MRA_SERVICE_TIMEOUT, mra_msg, CM_MRA_SETTING); if (private_data && private_data_len) IBA_SET_MEM(CM_MRA_PRIVATE_DATA, mra_msg, private_data, private_data_len); } static void cm_format_rej(struct cm_rej_msg *rej_msg, struct cm_id_private *cm_id_priv, enum ib_cm_rej_reason reason, void *ari, u8 ari_length, const void *private_data, u8 private_data_len, enum ib_cm_state state) { lockdep_assert_held(&cm_id_priv->lock); cm_format_mad_hdr(&rej_msg->hdr, CM_REJ_ATTR_ID, cm_id_priv->tid); IBA_SET(CM_REJ_REMOTE_COMM_ID, rej_msg, be32_to_cpu(cm_id_priv->id.remote_id)); switch (state) { case IB_CM_REQ_RCVD: IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(0)); IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ); break; case IB_CM_MRA_REQ_SENT: IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REQ); break; case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_REP); break; default: IBA_SET(CM_REJ_LOCAL_COMM_ID, rej_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_REJ_MESSAGE_REJECTED, rej_msg, CM_MSG_RESPONSE_OTHER); break; } IBA_SET(CM_REJ_REASON, rej_msg, reason); if (ari && ari_length) { IBA_SET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg, ari_length); IBA_SET_MEM(CM_REJ_ARI, rej_msg, ari, ari_length); } if (private_data && private_data_len) IBA_SET_MEM(CM_REJ_PRIVATE_DATA, rej_msg, private_data, private_data_len); } static void cm_dup_req_handler(struct cm_work *work, struct cm_id_private *cm_id_priv) { struct ib_mad_send_buf *msg = NULL; int ret; atomic_long_inc( &work->port->counters[CM_RECV_DUPLICATES][CM_REQ_COUNTER]); /* Quick state check to discard duplicate REQs. */ spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state == IB_CM_REQ_RCVD) { spin_unlock_irq(&cm_id_priv->lock); return; } spin_unlock_irq(&cm_id_priv->lock); ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, true, &msg); if (ret) return; spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_MRA_REQ_SENT: cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, CM_MSG_RESPONSE_REQ, cm_id_priv->private_data, cm_id_priv->private_data_len); break; case IB_CM_TIMEWAIT: cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, IB_CM_REJ_STALE_CONN, NULL, 0, NULL, 0, IB_CM_TIMEWAIT); break; default: goto unlock; } spin_unlock_irq(&cm_id_priv->lock); trace_icm_send_dup_req(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) goto free; return; unlock: spin_unlock_irq(&cm_id_priv->lock); free: cm_free_msg(msg); } static struct cm_id_private *cm_match_req(struct cm_work *work, struct cm_id_private *cm_id_priv) { struct cm_id_private *listen_cm_id_priv, *cur_cm_id_priv; struct cm_timewait_info *timewait_info; struct cm_req_msg *req_msg; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; /* Check for possible duplicate REQ. */ spin_lock_irq(&cm.lock); timewait_info = cm_insert_remote_id(cm_id_priv->timewait_info); if (timewait_info) { cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id, timewait_info->work.remote_id); spin_unlock_irq(&cm.lock); if (cur_cm_id_priv) { cm_dup_req_handler(work, cur_cm_id_priv); cm_deref_id(cur_cm_id_priv); } return NULL; } /* Check for stale connections. */ timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); if (timewait_info) { cm_remove_remote(cm_id_priv); cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id, timewait_info->work.remote_id); spin_unlock_irq(&cm.lock); cm_issue_rej(work->port, work->mad_recv_wc, IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REQ, NULL, 0); if (cur_cm_id_priv) { ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0); cm_deref_id(cur_cm_id_priv); } return NULL; } /* Find matching listen request. */ listen_cm_id_priv = cm_find_listen( cm_id_priv->id.device, cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg))); if (!listen_cm_id_priv) { cm_remove_remote(cm_id_priv); spin_unlock_irq(&cm.lock); cm_issue_rej(work->port, work->mad_recv_wc, IB_CM_REJ_INVALID_SERVICE_ID, CM_MSG_RESPONSE_REQ, NULL, 0); return NULL; } spin_unlock_irq(&cm.lock); return listen_cm_id_priv; } /* * Work-around for inter-subnet connections. If the LIDs are permissive, * we need to override the LID/SL data in the REQ with the LID information * in the work completion. */ static void cm_process_routed_req(struct cm_req_msg *req_msg, struct ib_wc *wc) { if (!IBA_GET(CM_REQ_PRIMARY_SUBNET_LOCAL, req_msg)) { if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg)) == IB_LID_PERMISSIVE) { IBA_SET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg, be16_to_cpu(ib_lid_be16(wc->slid))); IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl); } if (cpu_to_be16(IBA_GET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg)) == IB_LID_PERMISSIVE) IBA_SET(CM_REQ_PRIMARY_REMOTE_PORT_LID, req_msg, wc->dlid_path_bits); } if (!IBA_GET(CM_REQ_ALTERNATE_SUBNET_LOCAL, req_msg)) { if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg)) == IB_LID_PERMISSIVE) { IBA_SET(CM_REQ_ALTERNATE_LOCAL_PORT_LID, req_msg, be16_to_cpu(ib_lid_be16(wc->slid))); IBA_SET(CM_REQ_ALTERNATE_SL, req_msg, wc->sl); } if (cpu_to_be16(IBA_GET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg)) == IB_LID_PERMISSIVE) IBA_SET(CM_REQ_ALTERNATE_REMOTE_PORT_LID, req_msg, wc->dlid_path_bits); } } static int cm_req_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv, *listen_cm_id_priv; struct cm_req_msg *req_msg; const struct ib_global_route *grh; const struct ib_gid_attr *gid_attr; int ret; req_msg = (struct cm_req_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL); if (IS_ERR(cm_id_priv)) return PTR_ERR(cm_id_priv); cm_id_priv->id.remote_id = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_COMM_ID, req_msg)); cm_id_priv->id.service_id = cpu_to_be64(IBA_GET(CM_REQ_SERVICE_ID, req_msg)); cm_id_priv->tid = req_msg->hdr.tid; cm_id_priv->timeout_ms = cm_convert_to_ms( IBA_GET(CM_REQ_LOCAL_CM_RESPONSE_TIMEOUT, req_msg)); cm_id_priv->max_cm_retries = IBA_GET(CM_REQ_MAX_CM_RETRIES, req_msg); cm_id_priv->remote_qpn = cpu_to_be32(IBA_GET(CM_REQ_LOCAL_QPN, req_msg)); cm_id_priv->initiator_depth = IBA_GET(CM_REQ_RESPONDER_RESOURCES, req_msg); cm_id_priv->responder_resources = IBA_GET(CM_REQ_INITIATOR_DEPTH, req_msg); cm_id_priv->path_mtu = IBA_GET(CM_REQ_PATH_PACKET_PAYLOAD_MTU, req_msg); cm_id_priv->pkey = cpu_to_be16(IBA_GET(CM_REQ_PARTITION_KEY, req_msg)); cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REQ_STARTING_PSN, req_msg)); cm_id_priv->retry_count = IBA_GET(CM_REQ_RETRY_COUNT, req_msg); cm_id_priv->rnr_retry_count = IBA_GET(CM_REQ_RNR_RETRY_COUNT, req_msg); cm_id_priv->qp_type = cm_req_get_qp_type(req_msg); ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, &cm_id_priv->av); if (ret) goto destroy; cm_id_priv->timewait_info = cm_create_timewait_info(cm_id_priv-> id.local_id); if (IS_ERR(cm_id_priv->timewait_info)) { ret = PTR_ERR(cm_id_priv->timewait_info); cm_id_priv->timewait_info = NULL; goto destroy; } cm_id_priv->timewait_info->work.remote_id = cm_id_priv->id.remote_id; cm_id_priv->timewait_info->remote_ca_guid = cpu_to_be64(IBA_GET(CM_REQ_LOCAL_CA_GUID, req_msg)); cm_id_priv->timewait_info->remote_qpn = cm_id_priv->remote_qpn; /* * Note that the ID pointer is not in the xarray at this point, * so this set is only visible to the local thread. */ cm_id_priv->id.state = IB_CM_REQ_RCVD; listen_cm_id_priv = cm_match_req(work, cm_id_priv); if (!listen_cm_id_priv) { trace_icm_no_listener_err(&cm_id_priv->id); cm_id_priv->id.state = IB_CM_IDLE; ret = -EINVAL; goto destroy; } memset(&work->path[0], 0, sizeof(work->path[0])); if (cm_req_has_alt_path(req_msg)) memset(&work->path[1], 0, sizeof(work->path[1])); grh = rdma_ah_read_grh(&cm_id_priv->av.ah_attr); gid_attr = grh->sgid_attr; if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) { work->path[0].rec_type = sa_conv_gid_to_pathrec_type(gid_attr->gid_type); } else { cm_process_routed_req(req_msg, work->mad_recv_wc->wc); cm_path_set_rec_type( work->port->cm_dev->ib_device, work->port->port_num, &work->path[0], IBA_GET_MEM_PTR(CM_REQ_PRIMARY_LOCAL_PORT_GID, req_msg)); } if (cm_req_has_alt_path(req_msg)) work->path[1].rec_type = work->path[0].rec_type; cm_format_paths_from_req(req_msg, &work->path[0], &work->path[1], work->mad_recv_wc->wc); if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_ROCE) sa_path_set_dmac(&work->path[0], cm_id_priv->av.ah_attr.roce.dmac); work->path[0].hop_limit = grh->hop_limit; /* This destroy call is needed to pair with cm_init_av_for_response */ cm_destroy_av(&cm_id_priv->av); ret = cm_init_av_by_path(&work->path[0], gid_attr, &cm_id_priv->av); if (ret) { int err; err = rdma_query_gid(work->port->cm_dev->ib_device, work->port->port_num, 0, &work->path[0].sgid); if (err) ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID, NULL, 0, NULL, 0); else ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_GID, &work->path[0].sgid, sizeof(work->path[0].sgid), NULL, 0); goto rejected; } if (cm_id_priv->av.ah_attr.type == RDMA_AH_ATTR_TYPE_IB) cm_id_priv->av.dlid_datapath = IBA_GET(CM_REQ_PRIMARY_LOCAL_PORT_LID, req_msg); if (cm_req_has_alt_path(req_msg)) { ret = cm_init_av_by_path(&work->path[1], NULL, &cm_id_priv->alt_av); if (ret) { ib_send_cm_rej(&cm_id_priv->id, IB_CM_REJ_INVALID_ALT_GID, &work->path[0].sgid, sizeof(work->path[0].sgid), NULL, 0); goto rejected; } } cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; cm_id_priv->id.context = listen_cm_id_priv->id.context; cm_format_req_event(work, cm_id_priv, &listen_cm_id_priv->id); /* Now MAD handlers can see the new ID */ spin_lock_irq(&cm_id_priv->lock); cm_finalize_id(cm_id_priv); /* Refcount belongs to the event, pairs with cm_process_work() */ refcount_inc(&cm_id_priv->refcount); cm_queue_work_unlock(cm_id_priv, work); /* * Since this ID was just created and was not made visible to other MAD * handlers until the cm_finalize_id() above we know that the * cm_process_work() will deliver the event and the listen_cm_id * embedded in the event can be derefed here. */ cm_deref_id(listen_cm_id_priv); return 0; rejected: cm_deref_id(listen_cm_id_priv); destroy: ib_destroy_cm_id(&cm_id_priv->id); return ret; } static void cm_format_rep(struct cm_rep_msg *rep_msg, struct cm_id_private *cm_id_priv, struct ib_cm_rep_param *param) { cm_format_mad_ece_hdr(&rep_msg->hdr, CM_REP_ATTR_ID, cm_id_priv->tid, param->ece.attr_mod); IBA_SET(CM_REP_LOCAL_COMM_ID, rep_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_REP_REMOTE_COMM_ID, rep_msg, be32_to_cpu(cm_id_priv->id.remote_id)); IBA_SET(CM_REP_STARTING_PSN, rep_msg, param->starting_psn); IBA_SET(CM_REP_RESPONDER_RESOURCES, rep_msg, param->responder_resources); IBA_SET(CM_REP_TARGET_ACK_DELAY, rep_msg, cm_id_priv->av.port->cm_dev->ack_delay); IBA_SET(CM_REP_FAILOVER_ACCEPTED, rep_msg, param->failover_accepted); IBA_SET(CM_REP_RNR_RETRY_COUNT, rep_msg, param->rnr_retry_count); IBA_SET(CM_REP_LOCAL_CA_GUID, rep_msg, be64_to_cpu(cm_id_priv->id.device->node_guid)); if (cm_id_priv->qp_type != IB_QPT_XRC_TGT) { IBA_SET(CM_REP_INITIATOR_DEPTH, rep_msg, param->initiator_depth); IBA_SET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg, param->flow_control); IBA_SET(CM_REP_SRQ, rep_msg, param->srq); IBA_SET(CM_REP_LOCAL_QPN, rep_msg, param->qp_num); } else { IBA_SET(CM_REP_SRQ, rep_msg, 1); IBA_SET(CM_REP_LOCAL_EE_CONTEXT_NUMBER, rep_msg, param->qp_num); } IBA_SET(CM_REP_VENDOR_ID_L, rep_msg, param->ece.vendor_id); IBA_SET(CM_REP_VENDOR_ID_M, rep_msg, param->ece.vendor_id >> 8); IBA_SET(CM_REP_VENDOR_ID_H, rep_msg, param->ece.vendor_id >> 16); if (param->private_data && param->private_data_len) IBA_SET_MEM(CM_REP_PRIVATE_DATA, rep_msg, param->private_data, param->private_data_len); } int ib_send_cm_rep(struct ib_cm_id *cm_id, struct ib_cm_rep_param *param) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; struct cm_rep_msg *rep_msg; unsigned long flags; int ret; if (param->private_data && param->private_data_len > IB_CM_REP_PRIVATE_DATA_SIZE) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_REQ_RCVD && cm_id->state != IB_CM_MRA_REQ_SENT) { trace_icm_send_rep_err(cm_id_priv->id.local_id, cm_id->state); ret = -EINVAL; goto out; } msg = cm_alloc_priv_msg_rep(cm_id_priv, IB_CM_REP_SENT, true); if (IS_ERR(msg)) { ret = PTR_ERR(msg); goto out; } rep_msg = (struct cm_rep_msg *) msg->mad; cm_format_rep(rep_msg, cm_id_priv, param); trace_icm_send_rep(cm_id); ret = ib_post_send_mad(msg, NULL); if (ret) goto out_free; cm_id->state = IB_CM_REP_SENT; cm_id_priv->initiator_depth = param->initiator_depth; cm_id_priv->responder_resources = param->responder_resources; cm_id_priv->rq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg)); WARN_ONCE(param->qp_num & 0xFF000000, "IBTA declares QPN to be 24 bits, but it is 0x%X\n", param->qp_num); cm_id_priv->local_qpn = cpu_to_be32(param->qp_num & 0xFFFFFF); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; out_free: cm_free_priv_msg(msg); out: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_rep); static void cm_format_rtu(struct cm_rtu_msg *rtu_msg, struct cm_id_private *cm_id_priv, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&rtu_msg->hdr, CM_RTU_ATTR_ID, cm_id_priv->tid); IBA_SET(CM_RTU_LOCAL_COMM_ID, rtu_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_RTU_REMOTE_COMM_ID, rtu_msg, be32_to_cpu(cm_id_priv->id.remote_id)); if (private_data && private_data_len) IBA_SET_MEM(CM_RTU_PRIVATE_DATA, rtu_msg, private_data, private_data_len); } int ib_send_cm_rtu(struct ib_cm_id *cm_id, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; unsigned long flags; void *data; int ret; if (private_data && private_data_len > IB_CM_RTU_PRIVATE_DATA_SIZE) return -EINVAL; data = cm_copy_private_data(private_data, private_data_len); if (IS_ERR(data)) return PTR_ERR(data); cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state != IB_CM_REP_RCVD && cm_id->state != IB_CM_MRA_REP_SENT) { trace_icm_send_cm_rtu_err(cm_id); ret = -EINVAL; goto error; } msg = cm_alloc_msg(cm_id_priv); if (IS_ERR(msg)) { ret = PTR_ERR(msg); goto error; } cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, private_data, private_data_len); trace_icm_send_rtu(cm_id); ret = ib_post_send_mad(msg, NULL); if (ret) { spin_unlock_irqrestore(&cm_id_priv->lock, flags); cm_free_msg(msg); kfree(data); return ret; } cm_id->state = IB_CM_ESTABLISHED; cm_set_private_data(cm_id_priv, data, private_data_len); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; error: spin_unlock_irqrestore(&cm_id_priv->lock, flags); kfree(data); return ret; } EXPORT_SYMBOL(ib_send_cm_rtu); static void cm_format_rep_event(struct cm_work *work, enum ib_qp_type qp_type) { struct cm_rep_msg *rep_msg; struct ib_cm_rep_event_param *param; rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.rep_rcvd; param->remote_ca_guid = cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg)); param->remote_qkey = IBA_GET(CM_REP_LOCAL_Q_KEY, rep_msg); param->remote_qpn = be32_to_cpu(cm_rep_get_qpn(rep_msg, qp_type)); param->starting_psn = IBA_GET(CM_REP_STARTING_PSN, rep_msg); param->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg); param->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg); param->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg); param->failover_accepted = IBA_GET(CM_REP_FAILOVER_ACCEPTED, rep_msg); param->flow_control = IBA_GET(CM_REP_END_TO_END_FLOW_CONTROL, rep_msg); param->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg); param->srq = IBA_GET(CM_REP_SRQ, rep_msg); param->ece.vendor_id = IBA_GET(CM_REP_VENDOR_ID_H, rep_msg) << 16; param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_M, rep_msg) << 8; param->ece.vendor_id |= IBA_GET(CM_REP_VENDOR_ID_L, rep_msg); param->ece.attr_mod = be32_to_cpu(rep_msg->hdr.attr_mod); work->cm_event.private_data = IBA_GET_MEM_PTR(CM_REP_PRIVATE_DATA, rep_msg); } static void cm_dup_rep_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rep_msg *rep_msg; struct ib_mad_send_buf *msg = NULL; int ret; rep_msg = (struct cm_rep_msg *) work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg))); if (!cm_id_priv) return; atomic_long_inc( &work->port->counters[CM_RECV_DUPLICATES][CM_REP_COUNTER]); ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, true, &msg); if (ret) goto deref; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state == IB_CM_ESTABLISHED) cm_format_rtu((struct cm_rtu_msg *) msg->mad, cm_id_priv, cm_id_priv->private_data, cm_id_priv->private_data_len); else if (cm_id_priv->id.state == IB_CM_MRA_REP_SENT) cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, CM_MSG_RESPONSE_REP, cm_id_priv->private_data, cm_id_priv->private_data_len); else goto unlock; spin_unlock_irq(&cm_id_priv->lock); trace_icm_send_dup_rep(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) goto free; goto deref; unlock: spin_unlock_irq(&cm_id_priv->lock); free: cm_free_msg(msg); deref: cm_deref_id(cm_id_priv); } static int cm_rep_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rep_msg *rep_msg; int ret; struct cm_id_private *cur_cm_id_priv; struct cm_timewait_info *timewait_info; rep_msg = (struct cm_rep_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)), 0); if (!cm_id_priv) { cm_dup_rep_handler(work); trace_icm_remote_no_priv_err( IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); return -EINVAL; } cm_format_rep_event(work, cm_id_priv->qp_type); spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: break; default: ret = -EINVAL; trace_icm_rep_unknown_err( IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg), IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg), cm_id_priv->id.state); spin_unlock_irq(&cm_id_priv->lock); goto error; } cm_id_priv->timewait_info->work.remote_id = cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)); cm_id_priv->timewait_info->remote_ca_guid = cpu_to_be64(IBA_GET(CM_REP_LOCAL_CA_GUID, rep_msg)); cm_id_priv->timewait_info->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); spin_lock(&cm.lock); /* Check for duplicate REP. */ if (cm_insert_remote_id(cm_id_priv->timewait_info)) { spin_unlock(&cm.lock); spin_unlock_irq(&cm_id_priv->lock); ret = -EINVAL; trace_icm_insert_failed_err( IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); goto error; } /* Check for a stale connection. */ timewait_info = cm_insert_remote_qpn(cm_id_priv->timewait_info); if (timewait_info) { cm_remove_remote(cm_id_priv); cur_cm_id_priv = cm_acquire_id(timewait_info->work.local_id, timewait_info->work.remote_id); spin_unlock(&cm.lock); spin_unlock_irq(&cm_id_priv->lock); cm_issue_rej(work->port, work->mad_recv_wc, IB_CM_REJ_STALE_CONN, CM_MSG_RESPONSE_REP, NULL, 0); ret = -EINVAL; trace_icm_staleconn_err( IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg), IBA_GET(CM_REP_REMOTE_COMM_ID, rep_msg)); if (cur_cm_id_priv) { ib_send_cm_dreq(&cur_cm_id_priv->id, NULL, 0); cm_deref_id(cur_cm_id_priv); } goto error; } spin_unlock(&cm.lock); cm_id_priv->id.state = IB_CM_REP_RCVD; cm_id_priv->id.remote_id = cpu_to_be32(IBA_GET(CM_REP_LOCAL_COMM_ID, rep_msg)); cm_id_priv->remote_qpn = cm_rep_get_qpn(rep_msg, cm_id_priv->qp_type); cm_id_priv->initiator_depth = IBA_GET(CM_REP_RESPONDER_RESOURCES, rep_msg); cm_id_priv->responder_resources = IBA_GET(CM_REP_INITIATOR_DEPTH, rep_msg); cm_id_priv->sq_psn = cpu_to_be32(IBA_GET(CM_REP_STARTING_PSN, rep_msg)); cm_id_priv->rnr_retry_count = IBA_GET(CM_REP_RNR_RETRY_COUNT, rep_msg); cm_id_priv->target_ack_delay = IBA_GET(CM_REP_TARGET_ACK_DELAY, rep_msg); cm_id_priv->av.timeout = cm_ack_timeout(cm_id_priv->target_ack_delay, cm_id_priv->av.timeout - 1); cm_id_priv->alt_av.timeout = cm_ack_timeout(cm_id_priv->target_ack_delay, cm_id_priv->alt_av.timeout - 1); ib_cancel_mad(cm_id_priv->msg); cm_queue_work_unlock(cm_id_priv, work); return 0; error: cm_deref_id(cm_id_priv); return ret; } static int cm_establish_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; /* See comment in cm_establish about lookup. */ cm_id_priv = cm_acquire_id(work->local_id, work->remote_id); if (!cm_id_priv) return -EINVAL; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { spin_unlock_irq(&cm_id_priv->lock); goto out; } ib_cancel_mad(cm_id_priv->msg); cm_queue_work_unlock(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_rtu_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rtu_msg *rtu_msg; rtu_msg = (struct cm_rtu_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_RTU_REMOTE_COMM_ID, rtu_msg)), cpu_to_be32(IBA_GET(CM_RTU_LOCAL_COMM_ID, rtu_msg))); if (!cm_id_priv) return -EINVAL; work->cm_event.private_data = IBA_GET_MEM_PTR(CM_RTU_PRIVATE_DATA, rtu_msg); spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_REP_SENT && cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { spin_unlock_irq(&cm_id_priv->lock); atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_RTU_COUNTER]); goto out; } cm_id_priv->id.state = IB_CM_ESTABLISHED; ib_cancel_mad(cm_id_priv->msg); cm_queue_work_unlock(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, struct cm_id_private *cm_id_priv, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, cm_form_tid(cm_id_priv)); IBA_SET(CM_DREQ_LOCAL_COMM_ID, dreq_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_DREQ_REMOTE_COMM_ID, dreq_msg, be32_to_cpu(cm_id_priv->id.remote_id)); IBA_SET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg, be32_to_cpu(cm_id_priv->remote_qpn)); if (private_data && private_data_len) IBA_SET_MEM(CM_DREQ_PRIVATE_DATA, dreq_msg, private_data, private_data_len); } static void cm_issue_dreq(struct cm_id_private *cm_id_priv) { struct ib_mad_send_buf *msg; int ret; lockdep_assert_held(&cm_id_priv->lock); msg = cm_alloc_msg(cm_id_priv); if (IS_ERR(msg)) return; cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, NULL, 0); trace_icm_send_dreq(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) cm_free_msg(msg); } int ib_send_cm_dreq(struct ib_cm_id *cm_id, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv = container_of(cm_id, struct cm_id_private, id); struct ib_mad_send_buf *msg; unsigned long flags; int ret; if (private_data && private_data_len > IB_CM_DREQ_PRIVATE_DATA_SIZE) return -EINVAL; spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id_priv->id.state != IB_CM_ESTABLISHED) { trace_icm_dreq_skipped(&cm_id_priv->id); ret = -EINVAL; goto unlock; } if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) ib_cancel_mad(cm_id_priv->msg); msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_DREQ_SENT); if (IS_ERR(msg)) { cm_enter_timewait(cm_id_priv); ret = PTR_ERR(msg); goto unlock; } cm_format_dreq((struct cm_dreq_msg *) msg->mad, cm_id_priv, private_data, private_data_len); trace_icm_send_dreq(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) { cm_enter_timewait(cm_id_priv); cm_free_priv_msg(msg); goto unlock; } cm_id_priv->id.state = IB_CM_DREQ_SENT; unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_dreq); static void cm_format_drep(struct cm_drep_msg *drep_msg, struct cm_id_private *cm_id_priv, const void *private_data, u8 private_data_len) { cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, cm_id_priv->tid); IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg, be32_to_cpu(cm_id_priv->id.remote_id)); if (private_data && private_data_len) IBA_SET_MEM(CM_DREP_PRIVATE_DATA, drep_msg, private_data, private_data_len); } static int cm_send_drep_locked(struct cm_id_private *cm_id_priv, void *private_data, u8 private_data_len) { struct ib_mad_send_buf *msg; int ret; lockdep_assert_held(&cm_id_priv->lock); if (private_data && private_data_len > IB_CM_DREP_PRIVATE_DATA_SIZE) return -EINVAL; if (cm_id_priv->id.state != IB_CM_DREQ_RCVD) { trace_icm_send_drep_err(&cm_id_priv->id); kfree(private_data); return -EINVAL; } cm_set_private_data(cm_id_priv, private_data, private_data_len); cm_enter_timewait(cm_id_priv); msg = cm_alloc_msg(cm_id_priv); if (IS_ERR(msg)) return PTR_ERR(msg); cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, private_data, private_data_len); trace_icm_send_drep(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) { cm_free_msg(msg); return ret; } return 0; } int ib_send_cm_drep(struct ib_cm_id *cm_id, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv = container_of(cm_id, struct cm_id_private, id); unsigned long flags; void *data; int ret; data = cm_copy_private_data(private_data, private_data_len); if (IS_ERR(data)) return PTR_ERR(data); spin_lock_irqsave(&cm_id_priv->lock, flags); ret = cm_send_drep_locked(cm_id_priv, data, private_data_len); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_drep); static int cm_issue_drep(struct cm_port *port, struct ib_mad_recv_wc *mad_recv_wc) { struct ib_mad_send_buf *msg = NULL; struct cm_dreq_msg *dreq_msg; struct cm_drep_msg *drep_msg; int ret; ret = cm_alloc_response_msg(port, mad_recv_wc, true, &msg); if (ret) return ret; dreq_msg = (struct cm_dreq_msg *) mad_recv_wc->recv_buf.mad; drep_msg = (struct cm_drep_msg *) msg->mad; cm_format_mad_hdr(&drep_msg->hdr, CM_DREP_ATTR_ID, dreq_msg->hdr.tid); IBA_SET(CM_DREP_REMOTE_COMM_ID, drep_msg, IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg)); IBA_SET(CM_DREP_LOCAL_COMM_ID, drep_msg, IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); trace_icm_issue_drep( IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg), IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); ret = ib_post_send_mad(msg, NULL); if (ret) cm_free_msg(msg); return ret; } static int cm_dreq_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_dreq_msg *dreq_msg; struct ib_mad_send_buf *msg = NULL; dreq_msg = (struct cm_dreq_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)), cpu_to_be32(IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg))); if (!cm_id_priv) { atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_DREQ_COUNTER]); cm_issue_drep(work->port, work->mad_recv_wc); trace_icm_no_priv_err( IBA_GET(CM_DREQ_LOCAL_COMM_ID, dreq_msg), IBA_GET(CM_DREQ_REMOTE_COMM_ID, dreq_msg)); return -EINVAL; } work->cm_event.private_data = IBA_GET_MEM_PTR(CM_DREQ_PRIVATE_DATA, dreq_msg); spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->local_qpn != cpu_to_be32(IBA_GET(CM_DREQ_REMOTE_QPN_EECN, dreq_msg))) goto unlock; switch (cm_id_priv->id.state) { case IB_CM_REP_SENT: case IB_CM_DREQ_SENT: case IB_CM_MRA_REP_RCVD: ib_cancel_mad(cm_id_priv->msg); break; case IB_CM_ESTABLISHED: if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT || cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) ib_cancel_mad(cm_id_priv->msg); break; case IB_CM_TIMEWAIT: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_DREQ_COUNTER]); msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc, true); if (IS_ERR(msg)) goto unlock; cm_format_drep((struct cm_drep_msg *) msg->mad, cm_id_priv, cm_id_priv->private_data, cm_id_priv->private_data_len); spin_unlock_irq(&cm_id_priv->lock); if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) || ib_post_send_mad(msg, NULL)) cm_free_msg(msg); goto deref; case IB_CM_DREQ_RCVD: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_DREQ_COUNTER]); goto unlock; default: trace_icm_dreq_unknown_err(&cm_id_priv->id); goto unlock; } cm_id_priv->id.state = IB_CM_DREQ_RCVD; cm_id_priv->tid = dreq_msg->hdr.tid; cm_queue_work_unlock(cm_id_priv, work); return 0; unlock: spin_unlock_irq(&cm_id_priv->lock); deref: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_drep_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_drep_msg *drep_msg; drep_msg = (struct cm_drep_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_DREP_REMOTE_COMM_ID, drep_msg)), cpu_to_be32(IBA_GET(CM_DREP_LOCAL_COMM_ID, drep_msg))); if (!cm_id_priv) return -EINVAL; work->cm_event.private_data = IBA_GET_MEM_PTR(CM_DREP_PRIVATE_DATA, drep_msg); spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_DREQ_SENT && cm_id_priv->id.state != IB_CM_DREQ_RCVD) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_enter_timewait(cm_id_priv); ib_cancel_mad(cm_id_priv->msg); cm_queue_work_unlock(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_send_rej_locked(struct cm_id_private *cm_id_priv, enum ib_cm_rej_reason reason, void *ari, u8 ari_length, const void *private_data, u8 private_data_len) { enum ib_cm_state state = cm_id_priv->id.state; struct ib_mad_send_buf *msg; int ret; lockdep_assert_held(&cm_id_priv->lock); if ((private_data && private_data_len > IB_CM_REJ_PRIVATE_DATA_SIZE) || (ari && ari_length > IB_CM_REJ_ARI_LENGTH)) return -EINVAL; trace_icm_send_rej(&cm_id_priv->id, reason); switch (state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: cm_reset_to_idle(cm_id_priv); msg = cm_alloc_msg(cm_id_priv); if (IS_ERR(msg)) return PTR_ERR(msg); cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason, ari, ari_length, private_data, private_data_len, state); break; case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: cm_enter_timewait(cm_id_priv); msg = cm_alloc_msg(cm_id_priv); if (IS_ERR(msg)) return PTR_ERR(msg); cm_format_rej((struct cm_rej_msg *)msg->mad, cm_id_priv, reason, ari, ari_length, private_data, private_data_len, state); break; default: trace_icm_send_unknown_rej_err(&cm_id_priv->id); return -EINVAL; } ret = ib_post_send_mad(msg, NULL); if (ret) { cm_free_msg(msg); return ret; } return 0; } int ib_send_cm_rej(struct ib_cm_id *cm_id, enum ib_cm_rej_reason reason, void *ari, u8 ari_length, const void *private_data, u8 private_data_len) { struct cm_id_private *cm_id_priv = container_of(cm_id, struct cm_id_private, id); unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); ret = cm_send_rej_locked(cm_id_priv, reason, ari, ari_length, private_data, private_data_len); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_rej); static void cm_format_rej_event(struct cm_work *work) { struct cm_rej_msg *rej_msg; struct ib_cm_rej_event_param *param; rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.rej_rcvd; param->ari = IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg); param->ari_length = IBA_GET(CM_REJ_REJECTED_INFO_LENGTH, rej_msg); param->reason = IBA_GET(CM_REJ_REASON, rej_msg); work->cm_event.private_data = IBA_GET_MEM_PTR(CM_REJ_PRIVATE_DATA, rej_msg); } static struct cm_id_private *cm_acquire_rejected_id(struct cm_rej_msg *rej_msg) { struct cm_id_private *cm_id_priv; __be32 remote_id; remote_id = cpu_to_be32(IBA_GET(CM_REJ_LOCAL_COMM_ID, rej_msg)); if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_TIMEOUT) { cm_id_priv = cm_find_remote_id( *((__be64 *)IBA_GET_MEM_PTR(CM_REJ_ARI, rej_msg)), remote_id); } else if (IBA_GET(CM_REJ_MESSAGE_REJECTED, rej_msg) == CM_MSG_RESPONSE_REQ) cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)), 0); else cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_REJ_REMOTE_COMM_ID, rej_msg)), remote_id); return cm_id_priv; } static int cm_rej_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_rej_msg *rej_msg; rej_msg = (struct cm_rej_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_rejected_id(rej_msg); if (!cm_id_priv) return -EINVAL; cm_format_rej_event(work); spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: ib_cancel_mad(cm_id_priv->msg); fallthrough; case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_STALE_CONN) cm_enter_timewait(cm_id_priv); else cm_reset_to_idle(cm_id_priv); break; case IB_CM_DREQ_SENT: ib_cancel_mad(cm_id_priv->msg); fallthrough; case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: cm_enter_timewait(cm_id_priv); break; case IB_CM_ESTABLISHED: if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT || cm_id_priv->id.lap_state == IB_CM_LAP_SENT) { if (cm_id_priv->id.lap_state == IB_CM_LAP_SENT) ib_cancel_mad(cm_id_priv->msg); cm_enter_timewait(cm_id_priv); break; } fallthrough; default: trace_icm_rej_unknown_err(&cm_id_priv->id); spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_queue_work_unlock(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } int ib_prepare_cm_mra(struct ib_cm_id *cm_id) { struct cm_id_private *cm_id_priv; enum ib_cm_state cm_state; enum ib_cm_lap_state lap_state; unsigned long flags; int ret = 0; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { case IB_CM_REQ_RCVD: cm_state = IB_CM_MRA_REQ_SENT; lap_state = cm_id->lap_state; break; case IB_CM_REP_RCVD: cm_state = IB_CM_MRA_REP_SENT; lap_state = cm_id->lap_state; break; case IB_CM_ESTABLISHED: if (cm_id->lap_state == IB_CM_LAP_RCVD) { cm_state = cm_id->state; lap_state = IB_CM_MRA_LAP_SENT; break; } fallthrough; default: trace_icm_prepare_mra_unknown_err(&cm_id_priv->id); ret = -EINVAL; goto error_unlock; } cm_id->state = cm_state; cm_id->lap_state = lap_state; cm_set_private_data(cm_id_priv, NULL, 0); error_unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_prepare_cm_mra); static struct cm_id_private *cm_acquire_mraed_id(struct cm_mra_msg *mra_msg) { switch (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg)) { case CM_MSG_RESPONSE_REQ: return cm_acquire_id( cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)), 0); case CM_MSG_RESPONSE_REP: case CM_MSG_RESPONSE_OTHER: return cm_acquire_id( cpu_to_be32(IBA_GET(CM_MRA_REMOTE_COMM_ID, mra_msg)), cpu_to_be32(IBA_GET(CM_MRA_LOCAL_COMM_ID, mra_msg))); default: return NULL; } } static int cm_mra_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_mra_msg *mra_msg; int timeout; mra_msg = (struct cm_mra_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_mraed_id(mra_msg); if (!cm_id_priv) return -EINVAL; work->cm_event.private_data = IBA_GET_MEM_PTR(CM_MRA_PRIVATE_DATA, mra_msg); work->cm_event.param.mra_rcvd.service_timeout = IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg); timeout = cm_convert_to_ms(IBA_GET(CM_MRA_SERVICE_TIMEOUT, mra_msg)) + cm_convert_to_ms(cm_id_priv->av.timeout); spin_lock_irq(&cm_id_priv->lock); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) != CM_MSG_RESPONSE_REQ || ib_modify_mad(cm_id_priv->msg, timeout)) goto out; cm_id_priv->id.state = IB_CM_MRA_REQ_RCVD; break; case IB_CM_REP_SENT: if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) != CM_MSG_RESPONSE_REP || ib_modify_mad(cm_id_priv->msg, timeout)) goto out; cm_id_priv->id.state = IB_CM_MRA_REP_RCVD; break; case IB_CM_ESTABLISHED: if (IBA_GET(CM_MRA_MESSAGE_MRAED, mra_msg) != CM_MSG_RESPONSE_OTHER || cm_id_priv->id.lap_state != IB_CM_LAP_SENT || ib_modify_mad(cm_id_priv->msg, timeout)) { if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) atomic_long_inc( &work->port->counters[CM_RECV_DUPLICATES] [CM_MRA_COUNTER]); goto out; } cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; break; case IB_CM_MRA_REQ_RCVD: case IB_CM_MRA_REP_RCVD: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_MRA_COUNTER]); fallthrough; default: trace_icm_mra_unknown_err(&cm_id_priv->id); goto out; } cm_id_priv->msg->context[1] = (void *) (unsigned long) cm_id_priv->id.state; cm_queue_work_unlock(cm_id_priv, work); return 0; out: spin_unlock_irq(&cm_id_priv->lock); cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_path_lid_from_lap(struct cm_lap_msg *lap_msg, struct sa_path_rec *path) { u32 lid; if (path->rec_type != SA_PATH_REC_TYPE_OPA) { sa_path_set_dlid(path, IBA_GET(CM_LAP_ALTERNATE_LOCAL_PORT_LID, lap_msg)); sa_path_set_slid(path, IBA_GET(CM_LAP_ALTERNATE_REMOTE_PORT_LID, lap_msg)); } else { lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg)); sa_path_set_dlid(path, lid); lid = opa_get_lid_from_gid(IBA_GET_MEM_PTR( CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg)); sa_path_set_slid(path, lid); } } static void cm_format_path_from_lap(struct cm_id_private *cm_id_priv, struct sa_path_rec *path, struct cm_lap_msg *lap_msg) { path->dgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg); path->sgid = *IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_REMOTE_PORT_GID, lap_msg); path->flow_label = cpu_to_be32(IBA_GET(CM_LAP_ALTERNATE_FLOW_LABEL, lap_msg)); path->hop_limit = IBA_GET(CM_LAP_ALTERNATE_HOP_LIMIT, lap_msg); path->traffic_class = IBA_GET(CM_LAP_ALTERNATE_TRAFFIC_CLASS, lap_msg); path->reversible = 1; path->pkey = cm_id_priv->pkey; path->sl = IBA_GET(CM_LAP_ALTERNATE_SL, lap_msg); path->mtu_selector = IB_SA_EQ; path->mtu = cm_id_priv->path_mtu; path->rate_selector = IB_SA_EQ; path->rate = IBA_GET(CM_LAP_ALTERNATE_PACKET_RATE, lap_msg); path->packet_life_time_selector = IB_SA_EQ; path->packet_life_time = IBA_GET(CM_LAP_ALTERNATE_LOCAL_ACK_TIMEOUT, lap_msg); path->packet_life_time -= (path->packet_life_time > 0); cm_format_path_lid_from_lap(lap_msg, path); } static int cm_lap_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_lap_msg *lap_msg; struct ib_cm_lap_event_param *param; struct ib_mad_send_buf *msg = NULL; struct rdma_ah_attr ah_attr; struct cm_av alt_av = {}; int ret; /* Currently Alternate path messages are not supported for * RoCE link layer. */ if (rdma_protocol_roce(work->port->cm_dev->ib_device, work->port->port_num)) return -EINVAL; /* todo: verify LAP request and send reject APR if invalid. */ lap_msg = (struct cm_lap_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_LAP_REMOTE_COMM_ID, lap_msg)), cpu_to_be32(IBA_GET(CM_LAP_LOCAL_COMM_ID, lap_msg))); if (!cm_id_priv) return -EINVAL; param = &work->cm_event.param.lap_rcvd; memset(&work->path[0], 0, sizeof(work->path[1])); cm_path_set_rec_type(work->port->cm_dev->ib_device, work->port->port_num, &work->path[0], IBA_GET_MEM_PTR(CM_LAP_ALTERNATE_LOCAL_PORT_GID, lap_msg)); param->alternate_path = &work->path[0]; cm_format_path_from_lap(cm_id_priv, param->alternate_path, lap_msg); work->cm_event.private_data = IBA_GET_MEM_PTR(CM_LAP_PRIVATE_DATA, lap_msg); ret = ib_init_ah_attr_from_wc(work->port->cm_dev->ib_device, work->port->port_num, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, &ah_attr); if (ret) goto deref; ret = cm_init_av_by_path(param->alternate_path, NULL, &alt_av); if (ret) { rdma_destroy_ah_attr(&ah_attr); goto deref; } spin_lock_irq(&cm_id_priv->lock); cm_init_av_for_lap(work->port, work->mad_recv_wc->wc, &ah_attr, &cm_id_priv->av); cm_move_av_from_path(&cm_id_priv->alt_av, &alt_av); if (cm_id_priv->id.state != IB_CM_ESTABLISHED) goto unlock; switch (cm_id_priv->id.lap_state) { case IB_CM_LAP_UNINIT: case IB_CM_LAP_IDLE: break; case IB_CM_MRA_LAP_SENT: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_LAP_COUNTER]); msg = cm_alloc_response_msg_no_ah(work->port, work->mad_recv_wc, true); if (IS_ERR(msg)) goto unlock; cm_format_mra((struct cm_mra_msg *) msg->mad, cm_id_priv, CM_MSG_RESPONSE_OTHER, cm_id_priv->private_data, cm_id_priv->private_data_len); spin_unlock_irq(&cm_id_priv->lock); if (cm_create_response_msg_ah(work->port, work->mad_recv_wc, msg) || ib_post_send_mad(msg, NULL)) cm_free_msg(msg); goto deref; case IB_CM_LAP_RCVD: atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_LAP_COUNTER]); goto unlock; default: goto unlock; } cm_id_priv->id.lap_state = IB_CM_LAP_RCVD; cm_id_priv->tid = lap_msg->hdr.tid; cm_queue_work_unlock(cm_id_priv, work); return 0; unlock: spin_unlock_irq(&cm_id_priv->lock); deref: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_apr_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv; struct cm_apr_msg *apr_msg; /* Currently Alternate path messages are not supported for * RoCE link layer. */ if (rdma_protocol_roce(work->port->cm_dev->ib_device, work->port->port_num)) return -EINVAL; apr_msg = (struct cm_apr_msg *)work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_APR_REMOTE_COMM_ID, apr_msg)), cpu_to_be32(IBA_GET(CM_APR_LOCAL_COMM_ID, apr_msg))); if (!cm_id_priv) return -EINVAL; /* Unmatched reply. */ work->cm_event.param.apr_rcvd.ap_status = IBA_GET(CM_APR_AR_STATUS, apr_msg); work->cm_event.param.apr_rcvd.apr_info = IBA_GET_MEM_PTR(CM_APR_ADDITIONAL_INFORMATION, apr_msg); work->cm_event.param.apr_rcvd.info_len = IBA_GET(CM_APR_ADDITIONAL_INFORMATION_LENGTH, apr_msg); work->cm_event.private_data = IBA_GET_MEM_PTR(CM_APR_PRIVATE_DATA, apr_msg); spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_ESTABLISHED || (cm_id_priv->id.lap_state != IB_CM_LAP_SENT && cm_id_priv->id.lap_state != IB_CM_MRA_LAP_RCVD)) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_id_priv->id.lap_state = IB_CM_LAP_IDLE; ib_cancel_mad(cm_id_priv->msg); cm_queue_work_unlock(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static int cm_timewait_handler(struct cm_work *work) { struct cm_timewait_info *timewait_info; struct cm_id_private *cm_id_priv; timewait_info = container_of(work, struct cm_timewait_info, work); spin_lock_irq(&cm.lock); list_del(&timewait_info->list); spin_unlock_irq(&cm.lock); cm_id_priv = cm_acquire_id(timewait_info->work.local_id, timewait_info->work.remote_id); if (!cm_id_priv) return -EINVAL; spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_TIMEWAIT || cm_id_priv->remote_qpn != timewait_info->remote_qpn) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_id_priv->id.state = IB_CM_IDLE; cm_queue_work_unlock(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, struct cm_id_private *cm_id_priv, struct ib_cm_sidr_req_param *param) { cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, cm_form_tid(cm_id_priv)); IBA_SET(CM_SIDR_REQ_REQUESTID, sidr_req_msg, be32_to_cpu(cm_id_priv->id.local_id)); IBA_SET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg, be16_to_cpu(param->path->pkey)); IBA_SET(CM_SIDR_REQ_SERVICEID, sidr_req_msg, be64_to_cpu(param->service_id)); if (param->private_data && param->private_data_len) IBA_SET_MEM(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg, param->private_data, param->private_data_len); } int ib_send_cm_sidr_req(struct ib_cm_id *cm_id, struct ib_cm_sidr_req_param *param) { struct cm_id_private *cm_id_priv; struct ib_mad_send_buf *msg; struct cm_av av = {}; unsigned long flags; int ret; if (!param->path || (param->private_data && param->private_data_len > IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE)) return -EINVAL; cm_id_priv = container_of(cm_id, struct cm_id_private, id); ret = cm_init_av_by_path(param->path, param->sgid_attr, &av); if (ret) return ret; spin_lock_irqsave(&cm_id_priv->lock, flags); cm_move_av_from_path(&cm_id_priv->av, &av); cm_id->service_id = param->service_id; cm_id_priv->timeout_ms = param->timeout_ms; cm_id_priv->max_cm_retries = param->max_cm_retries; if (cm_id->state != IB_CM_IDLE) { ret = -EINVAL; goto out_unlock; } msg = cm_alloc_priv_msg(cm_id_priv, IB_CM_SIDR_REQ_SENT); if (IS_ERR(msg)) { ret = PTR_ERR(msg); goto out_unlock; } cm_format_sidr_req((struct cm_sidr_req_msg *)msg->mad, cm_id_priv, param); trace_icm_send_sidr_req(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) goto out_free; cm_id->state = IB_CM_SIDR_REQ_SENT; spin_unlock_irqrestore(&cm_id_priv->lock, flags); return 0; out_free: cm_free_priv_msg(msg); out_unlock: spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_sidr_req); static void cm_format_sidr_req_event(struct cm_work *work, const struct cm_id_private *rx_cm_id, struct ib_cm_id *listen_id) { struct cm_sidr_req_msg *sidr_req_msg; struct ib_cm_sidr_req_event_param *param; sidr_req_msg = (struct cm_sidr_req_msg *) work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.sidr_req_rcvd; param->pkey = IBA_GET(CM_SIDR_REQ_PARTITION_KEY, sidr_req_msg); param->listen_id = listen_id; param->service_id = cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg)); param->bth_pkey = cm_get_bth_pkey(work); param->port = work->port->port_num; param->sgid_attr = rx_cm_id->av.ah_attr.grh.sgid_attr; work->cm_event.private_data = IBA_GET_MEM_PTR(CM_SIDR_REQ_PRIVATE_DATA, sidr_req_msg); } static int cm_sidr_req_handler(struct cm_work *work) { struct cm_id_private *cm_id_priv, *listen_cm_id_priv; struct cm_sidr_req_msg *sidr_req_msg; struct ib_wc *wc; int ret; cm_id_priv = cm_alloc_id_priv(work->port->cm_dev->ib_device, NULL, NULL); if (IS_ERR(cm_id_priv)) return PTR_ERR(cm_id_priv); /* Record SGID/SLID and request ID for lookup. */ sidr_req_msg = (struct cm_sidr_req_msg *) work->mad_recv_wc->recv_buf.mad; cm_id_priv->id.remote_id = cpu_to_be32(IBA_GET(CM_SIDR_REQ_REQUESTID, sidr_req_msg)); cm_id_priv->id.service_id = cpu_to_be64(IBA_GET(CM_SIDR_REQ_SERVICEID, sidr_req_msg)); cm_id_priv->tid = sidr_req_msg->hdr.tid; wc = work->mad_recv_wc->wc; cm_id_priv->sidr_slid = wc->slid; ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, work->mad_recv_wc->recv_buf.grh, &cm_id_priv->av); if (ret) goto out; spin_lock_irq(&cm.lock); listen_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); if (listen_cm_id_priv) { spin_unlock_irq(&cm.lock); atomic_long_inc(&work->port->counters[CM_RECV_DUPLICATES] [CM_SIDR_REQ_COUNTER]); goto out; /* Duplicate message. */ } cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; listen_cm_id_priv = cm_find_listen(cm_id_priv->id.device, cm_id_priv->id.service_id); if (!listen_cm_id_priv) { spin_unlock_irq(&cm.lock); ib_send_cm_sidr_rep(&cm_id_priv->id, &(struct ib_cm_sidr_rep_param){ .status = IB_SIDR_UNSUPPORTED }); goto out; /* No match. */ } spin_unlock_irq(&cm.lock); cm_id_priv->id.cm_handler = listen_cm_id_priv->id.cm_handler; cm_id_priv->id.context = listen_cm_id_priv->id.context; /* * A SIDR ID does not need to be in the xarray since it does not receive * mads, is not placed in the remote_id or remote_qpn rbtree, and does * not enter timewait. */ cm_format_sidr_req_event(work, cm_id_priv, &listen_cm_id_priv->id); ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &work->cm_event); cm_free_work(work); /* * A pointer to the listen_cm_id is held in the event, so this deref * must be after the event is delivered above. */ cm_deref_id(listen_cm_id_priv); if (ret) cm_destroy_id(&cm_id_priv->id, ret); return 0; out: ib_destroy_cm_id(&cm_id_priv->id); return -EINVAL; } static void cm_format_sidr_rep(struct cm_sidr_rep_msg *sidr_rep_msg, struct cm_id_private *cm_id_priv, struct ib_cm_sidr_rep_param *param) { cm_format_mad_ece_hdr(&sidr_rep_msg->hdr, CM_SIDR_REP_ATTR_ID, cm_id_priv->tid, param->ece.attr_mod); IBA_SET(CM_SIDR_REP_REQUESTID, sidr_rep_msg, be32_to_cpu(cm_id_priv->id.remote_id)); IBA_SET(CM_SIDR_REP_STATUS, sidr_rep_msg, param->status); IBA_SET(CM_SIDR_REP_QPN, sidr_rep_msg, param->qp_num); IBA_SET(CM_SIDR_REP_SERVICEID, sidr_rep_msg, be64_to_cpu(cm_id_priv->id.service_id)); IBA_SET(CM_SIDR_REP_Q_KEY, sidr_rep_msg, param->qkey); IBA_SET(CM_SIDR_REP_VENDOR_ID_L, sidr_rep_msg, param->ece.vendor_id & 0xFF); IBA_SET(CM_SIDR_REP_VENDOR_ID_H, sidr_rep_msg, (param->ece.vendor_id >> 8) & 0xFF); if (param->info && param->info_length) IBA_SET_MEM(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg, param->info, param->info_length); if (param->private_data && param->private_data_len) IBA_SET_MEM(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg, param->private_data, param->private_data_len); } static int cm_send_sidr_rep_locked(struct cm_id_private *cm_id_priv, struct ib_cm_sidr_rep_param *param) { struct ib_mad_send_buf *msg; unsigned long flags; int ret; lockdep_assert_held(&cm_id_priv->lock); if ((param->info && param->info_length > IB_CM_SIDR_REP_INFO_LENGTH) || (param->private_data && param->private_data_len > IB_CM_SIDR_REP_PRIVATE_DATA_SIZE)) return -EINVAL; if (cm_id_priv->id.state != IB_CM_SIDR_REQ_RCVD) return -EINVAL; msg = cm_alloc_msg(cm_id_priv); if (IS_ERR(msg)) return PTR_ERR(msg); cm_format_sidr_rep((struct cm_sidr_rep_msg *) msg->mad, cm_id_priv, param); trace_icm_send_sidr_rep(&cm_id_priv->id); ret = ib_post_send_mad(msg, NULL); if (ret) { cm_free_msg(msg); return ret; } cm_id_priv->id.state = IB_CM_IDLE; spin_lock_irqsave(&cm.lock, flags); if (!RB_EMPTY_NODE(&cm_id_priv->sidr_id_node)) { rb_erase(&cm_id_priv->sidr_id_node, &cm.remote_sidr_table); RB_CLEAR_NODE(&cm_id_priv->sidr_id_node); } spin_unlock_irqrestore(&cm.lock, flags); return 0; } int ib_send_cm_sidr_rep(struct ib_cm_id *cm_id, struct ib_cm_sidr_rep_param *param) { struct cm_id_private *cm_id_priv = container_of(cm_id, struct cm_id_private, id); unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); ret = cm_send_sidr_rep_locked(cm_id_priv, param); spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } EXPORT_SYMBOL(ib_send_cm_sidr_rep); static void cm_format_sidr_rep_event(struct cm_work *work, const struct cm_id_private *cm_id_priv) { struct cm_sidr_rep_msg *sidr_rep_msg; struct ib_cm_sidr_rep_event_param *param; sidr_rep_msg = (struct cm_sidr_rep_msg *) work->mad_recv_wc->recv_buf.mad; param = &work->cm_event.param.sidr_rep_rcvd; param->status = IBA_GET(CM_SIDR_REP_STATUS, sidr_rep_msg); param->qkey = IBA_GET(CM_SIDR_REP_Q_KEY, sidr_rep_msg); param->qpn = IBA_GET(CM_SIDR_REP_QPN, sidr_rep_msg); param->info = IBA_GET_MEM_PTR(CM_SIDR_REP_ADDITIONAL_INFORMATION, sidr_rep_msg); param->info_len = IBA_GET(CM_SIDR_REP_ADDITIONAL_INFORMATION_LENGTH, sidr_rep_msg); param->sgid_attr = cm_id_priv->av.ah_attr.grh.sgid_attr; work->cm_event.private_data = IBA_GET_MEM_PTR(CM_SIDR_REP_PRIVATE_DATA, sidr_rep_msg); } static int cm_sidr_rep_handler(struct cm_work *work) { struct cm_sidr_rep_msg *sidr_rep_msg; struct cm_id_private *cm_id_priv; sidr_rep_msg = (struct cm_sidr_rep_msg *) work->mad_recv_wc->recv_buf.mad; cm_id_priv = cm_acquire_id( cpu_to_be32(IBA_GET(CM_SIDR_REP_REQUESTID, sidr_rep_msg)), 0); if (!cm_id_priv) return -EINVAL; /* Unmatched reply. */ spin_lock_irq(&cm_id_priv->lock); if (cm_id_priv->id.state != IB_CM_SIDR_REQ_SENT) { spin_unlock_irq(&cm_id_priv->lock); goto out; } cm_id_priv->id.state = IB_CM_IDLE; ib_cancel_mad(cm_id_priv->msg); spin_unlock_irq(&cm_id_priv->lock); cm_format_sidr_rep_event(work, cm_id_priv); cm_process_work(cm_id_priv, work); return 0; out: cm_deref_id(cm_id_priv); return -EINVAL; } static void cm_process_send_error(struct cm_id_private *cm_id_priv, struct ib_mad_send_buf *msg, enum ib_wc_status wc_status) { enum ib_cm_state state = (unsigned long) msg->context[1]; struct ib_cm_event cm_event = {}; int ret; /* Discard old sends. */ spin_lock_irq(&cm_id_priv->lock); if (msg != cm_id_priv->msg) { spin_unlock_irq(&cm_id_priv->lock); cm_free_msg(msg); cm_deref_id(cm_id_priv); return; } cm_free_priv_msg(msg); if (state != cm_id_priv->id.state || wc_status == IB_WC_SUCCESS || wc_status == IB_WC_WR_FLUSH_ERR) goto out_unlock; trace_icm_mad_send_err(state, wc_status); switch (state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: cm_reset_to_idle(cm_id_priv); cm_event.event = IB_CM_REQ_ERROR; break; case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: cm_reset_to_idle(cm_id_priv); cm_event.event = IB_CM_REP_ERROR; break; case IB_CM_DREQ_SENT: cm_enter_timewait(cm_id_priv); cm_event.event = IB_CM_DREQ_ERROR; break; case IB_CM_SIDR_REQ_SENT: cm_id_priv->id.state = IB_CM_IDLE; cm_event.event = IB_CM_SIDR_REQ_ERROR; break; default: goto out_unlock; } spin_unlock_irq(&cm_id_priv->lock); cm_event.param.send_status = wc_status; /* No other events can occur on the cm_id at this point. */ ret = cm_id_priv->id.cm_handler(&cm_id_priv->id, &cm_event); if (ret) ib_destroy_cm_id(&cm_id_priv->id); return; out_unlock: spin_unlock_irq(&cm_id_priv->lock); } static void cm_send_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_wc *mad_send_wc) { struct ib_mad_send_buf *msg = mad_send_wc->send_buf; struct cm_id_private *cm_id_priv; struct cm_port *port; u16 attr_index; port = mad_agent->context; attr_index = be16_to_cpu(((struct ib_mad_hdr *) msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; if (msg->context[0] == CM_DIRECT_RETRY_CTX) { msg->retries = 1; cm_id_priv = NULL; } else { cm_id_priv = msg->context[0]; } atomic_long_add(1 + msg->retries, &port->counters[CM_XMIT][attr_index]); if (msg->retries) atomic_long_add(msg->retries, &port->counters[CM_XMIT_RETRIES][attr_index]); if (cm_id_priv) cm_process_send_error(cm_id_priv, msg, mad_send_wc->status); else cm_free_msg(msg); } static void cm_work_handler(struct work_struct *_work) { struct cm_work *work = container_of(_work, struct cm_work, work.work); int ret; switch (work->cm_event.event) { case IB_CM_REQ_RECEIVED: ret = cm_req_handler(work); break; case IB_CM_MRA_RECEIVED: ret = cm_mra_handler(work); break; case IB_CM_REJ_RECEIVED: ret = cm_rej_handler(work); break; case IB_CM_REP_RECEIVED: ret = cm_rep_handler(work); break; case IB_CM_RTU_RECEIVED: ret = cm_rtu_handler(work); break; case IB_CM_USER_ESTABLISHED: ret = cm_establish_handler(work); break; case IB_CM_DREQ_RECEIVED: ret = cm_dreq_handler(work); break; case IB_CM_DREP_RECEIVED: ret = cm_drep_handler(work); break; case IB_CM_SIDR_REQ_RECEIVED: ret = cm_sidr_req_handler(work); break; case IB_CM_SIDR_REP_RECEIVED: ret = cm_sidr_rep_handler(work); break; case IB_CM_LAP_RECEIVED: ret = cm_lap_handler(work); break; case IB_CM_APR_RECEIVED: ret = cm_apr_handler(work); break; case IB_CM_TIMEWAIT_EXIT: ret = cm_timewait_handler(work); break; default: trace_icm_handler_err(work->cm_event.event); ret = -EINVAL; break; } if (ret) cm_free_work(work); } static int cm_establish(struct ib_cm_id *cm_id) { struct cm_id_private *cm_id_priv; struct cm_work *work; unsigned long flags; int ret = 0; struct cm_device *cm_dev; cm_dev = ib_get_client_data(cm_id->device, &cm_client); if (!cm_dev) return -ENODEV; work = kmalloc(sizeof *work, GFP_ATOMIC); if (!work) return -ENOMEM; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id->state) { case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: cm_id->state = IB_CM_ESTABLISHED; break; case IB_CM_ESTABLISHED: ret = -EISCONN; break; default: trace_icm_establish_err(cm_id); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); if (ret) { kfree(work); goto out; } /* * The CM worker thread may try to destroy the cm_id before it * can execute this work item. To prevent potential deadlock, * we need to find the cm_id once we're in the context of the * worker thread, rather than holding a reference on it. */ INIT_DELAYED_WORK(&work->work, cm_work_handler); work->local_id = cm_id->local_id; work->remote_id = cm_id->remote_id; work->mad_recv_wc = NULL; work->cm_event.event = IB_CM_USER_ESTABLISHED; /* Check if the device started its remove_one */ spin_lock_irqsave(&cm.lock, flags); if (!cm_dev->going_down) { queue_delayed_work(cm.wq, &work->work, 0); } else { kfree(work); ret = -ENODEV; } spin_unlock_irqrestore(&cm.lock, flags); out: return ret; } static int cm_migrate(struct ib_cm_id *cm_id) { struct cm_id_private *cm_id_priv; unsigned long flags; int ret = 0; cm_id_priv = container_of(cm_id, struct cm_id_private, id); spin_lock_irqsave(&cm_id_priv->lock, flags); if (cm_id->state == IB_CM_ESTABLISHED && (cm_id->lap_state == IB_CM_LAP_UNINIT || cm_id->lap_state == IB_CM_LAP_IDLE)) { cm_id->lap_state = IB_CM_LAP_IDLE; cm_id_priv->av = cm_id_priv->alt_av; } else ret = -EINVAL; spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event) { int ret; switch (event) { case IB_EVENT_COMM_EST: ret = cm_establish(cm_id); break; case IB_EVENT_PATH_MIG: ret = cm_migrate(cm_id); break; default: ret = -EINVAL; } return ret; } EXPORT_SYMBOL(ib_cm_notify); static void cm_recv_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_buf *send_buf, struct ib_mad_recv_wc *mad_recv_wc) { struct cm_port *port = mad_agent->context; struct cm_work *work; enum ib_cm_event_type event; bool alt_path = false; u16 attr_id; int paths = 0; int going_down = 0; switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { case CM_REQ_ATTR_ID: alt_path = cm_req_has_alt_path((struct cm_req_msg *) mad_recv_wc->recv_buf.mad); paths = 1 + (alt_path != 0); event = IB_CM_REQ_RECEIVED; break; case CM_MRA_ATTR_ID: event = IB_CM_MRA_RECEIVED; break; case CM_REJ_ATTR_ID: event = IB_CM_REJ_RECEIVED; break; case CM_REP_ATTR_ID: event = IB_CM_REP_RECEIVED; break; case CM_RTU_ATTR_ID: event = IB_CM_RTU_RECEIVED; break; case CM_DREQ_ATTR_ID: event = IB_CM_DREQ_RECEIVED; break; case CM_DREP_ATTR_ID: event = IB_CM_DREP_RECEIVED; break; case CM_SIDR_REQ_ATTR_ID: event = IB_CM_SIDR_REQ_RECEIVED; break; case CM_SIDR_REP_ATTR_ID: event = IB_CM_SIDR_REP_RECEIVED; break; case CM_LAP_ATTR_ID: paths = 1; event = IB_CM_LAP_RECEIVED; break; case CM_APR_ATTR_ID: event = IB_CM_APR_RECEIVED; break; default: ib_free_recv_mad(mad_recv_wc); return; } attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); atomic_long_inc(&port->counters[CM_RECV][attr_id - CM_ATTR_ID_OFFSET]); work = kmalloc(struct_size(work, path, paths), GFP_KERNEL); if (!work) { ib_free_recv_mad(mad_recv_wc); return; } INIT_DELAYED_WORK(&work->work, cm_work_handler); work->cm_event.event = event; work->mad_recv_wc = mad_recv_wc; work->port = port; /* Check if the device started its remove_one */ spin_lock_irq(&cm.lock); if (!port->cm_dev->going_down) queue_delayed_work(cm.wq, &work->work, 0); else going_down = 1; spin_unlock_irq(&cm.lock); if (going_down) { kfree(work); ib_free_recv_mad(mad_recv_wc); } } static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { case IB_CM_REQ_SENT: case IB_CM_MRA_REQ_RCVD: case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: case IB_CM_ESTABLISHED: *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS | IB_QP_PKEY_INDEX | IB_QP_PORT; qp_attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE; if (cm_id_priv->responder_resources) { struct ib_device *ib_dev = cm_id_priv->id.device; u64 support_flush = ib_dev->attrs.device_cap_flags & (IB_DEVICE_FLUSH_GLOBAL | IB_DEVICE_FLUSH_PERSISTENT); u32 flushable = support_flush ? (IB_ACCESS_FLUSH_GLOBAL | IB_ACCESS_FLUSH_PERSISTENT) : 0; qp_attr->qp_access_flags |= IB_ACCESS_REMOTE_READ | IB_ACCESS_REMOTE_ATOMIC | flushable; } qp_attr->pkey_index = cm_id_priv->av.pkey_index; if (cm_id_priv->av.port) qp_attr->port_num = cm_id_priv->av.port->port_num; ret = 0; break; default: trace_icm_qp_init_err(&cm_id_priv->id); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: case IB_CM_ESTABLISHED: *qp_attr_mask = IB_QP_STATE | IB_QP_AV | IB_QP_PATH_MTU | IB_QP_DEST_QPN | IB_QP_RQ_PSN; qp_attr->ah_attr = cm_id_priv->av.ah_attr; if ((qp_attr->ah_attr.type == RDMA_AH_ATTR_TYPE_IB) && cm_id_priv->av.dlid_datapath && (cm_id_priv->av.dlid_datapath != 0xffff)) qp_attr->ah_attr.ib.dlid = cm_id_priv->av.dlid_datapath; qp_attr->path_mtu = cm_id_priv->path_mtu; qp_attr->dest_qp_num = be32_to_cpu(cm_id_priv->remote_qpn); qp_attr->rq_psn = be32_to_cpu(cm_id_priv->rq_psn); if (cm_id_priv->qp_type == IB_QPT_RC || cm_id_priv->qp_type == IB_QPT_XRC_TGT) { *qp_attr_mask |= IB_QP_MAX_DEST_RD_ATOMIC | IB_QP_MIN_RNR_TIMER; qp_attr->max_dest_rd_atomic = cm_id_priv->responder_resources; qp_attr->min_rnr_timer = 0; } if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr) && cm_id_priv->alt_av.port) { *qp_attr_mask |= IB_QP_ALT_PATH; qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; } ret = 0; break; default: trace_icm_qp_rtr_err(&cm_id_priv->id); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { unsigned long flags; int ret; spin_lock_irqsave(&cm_id_priv->lock, flags); switch (cm_id_priv->id.state) { /* Allow transition to RTS before sending REP */ case IB_CM_REQ_RCVD: case IB_CM_MRA_REQ_SENT: case IB_CM_REP_RCVD: case IB_CM_MRA_REP_SENT: case IB_CM_REP_SENT: case IB_CM_MRA_REP_RCVD: case IB_CM_ESTABLISHED: if (cm_id_priv->id.lap_state == IB_CM_LAP_UNINIT) { *qp_attr_mask = IB_QP_STATE | IB_QP_SQ_PSN; qp_attr->sq_psn = be32_to_cpu(cm_id_priv->sq_psn); switch (cm_id_priv->qp_type) { case IB_QPT_RC: case IB_QPT_XRC_INI: *qp_attr_mask |= IB_QP_RETRY_CNT | IB_QP_RNR_RETRY | IB_QP_MAX_QP_RD_ATOMIC; qp_attr->retry_cnt = cm_id_priv->retry_count; qp_attr->rnr_retry = cm_id_priv->rnr_retry_count; qp_attr->max_rd_atomic = cm_id_priv->initiator_depth; fallthrough; case IB_QPT_XRC_TGT: *qp_attr_mask |= IB_QP_TIMEOUT; qp_attr->timeout = cm_id_priv->av.timeout; break; default: break; } if (rdma_ah_get_dlid(&cm_id_priv->alt_av.ah_attr)) { *qp_attr_mask |= IB_QP_PATH_MIG_STATE; qp_attr->path_mig_state = IB_MIG_REARM; } } else { *qp_attr_mask = IB_QP_ALT_PATH | IB_QP_PATH_MIG_STATE; if (cm_id_priv->alt_av.port) qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num; qp_attr->alt_pkey_index = cm_id_priv->alt_av.pkey_index; qp_attr->alt_timeout = cm_id_priv->alt_av.timeout; qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr; qp_attr->path_mig_state = IB_MIG_REARM; } ret = 0; break; default: trace_icm_qp_rts_err(&cm_id_priv->id); ret = -EINVAL; break; } spin_unlock_irqrestore(&cm_id_priv->lock, flags); return ret; } int ib_cm_init_qp_attr(struct ib_cm_id *cm_id, struct ib_qp_attr *qp_attr, int *qp_attr_mask) { struct cm_id_private *cm_id_priv; int ret; cm_id_priv = container_of(cm_id, struct cm_id_private, id); switch (qp_attr->qp_state) { case IB_QPS_INIT: ret = cm_init_qp_init_attr(cm_id_priv, qp_attr, qp_attr_mask); break; case IB_QPS_RTR: ret = cm_init_qp_rtr_attr(cm_id_priv, qp_attr, qp_attr_mask); break; case IB_QPS_RTS: ret = cm_init_qp_rts_attr(cm_id_priv, qp_attr, qp_attr_mask); break; default: ret = -EINVAL; break; } return ret; } EXPORT_SYMBOL(ib_cm_init_qp_attr); static ssize_t cm_show_counter(struct ib_device *ibdev, u32 port_num, struct ib_port_attribute *attr, char *buf) { struct cm_counter_attribute *cm_attr = container_of(attr, struct cm_counter_attribute, attr); struct cm_device *cm_dev = ib_get_client_data(ibdev, &cm_client); if (WARN_ON(!cm_dev)) return -EINVAL; return sysfs_emit( buf, "%ld\n", atomic_long_read( &cm_dev->port[port_num - 1] ->counters[cm_attr->group][cm_attr->index])); } #define CM_COUNTER_ATTR(_name, _group, _index) \ { \ .attr = __ATTR(_name, 0444, cm_show_counter, NULL), \ .group = _group, .index = _index \ } #define CM_COUNTER_GROUP(_group, _name) \ static struct cm_counter_attribute cm_counter_attr_##_group[] = { \ CM_COUNTER_ATTR(req, _group, CM_REQ_COUNTER), \ CM_COUNTER_ATTR(mra, _group, CM_MRA_COUNTER), \ CM_COUNTER_ATTR(rej, _group, CM_REJ_COUNTER), \ CM_COUNTER_ATTR(rep, _group, CM_REP_COUNTER), \ CM_COUNTER_ATTR(rtu, _group, CM_RTU_COUNTER), \ CM_COUNTER_ATTR(dreq, _group, CM_DREQ_COUNTER), \ CM_COUNTER_ATTR(drep, _group, CM_DREP_COUNTER), \ CM_COUNTER_ATTR(sidr_req, _group, CM_SIDR_REQ_COUNTER), \ CM_COUNTER_ATTR(sidr_rep, _group, CM_SIDR_REP_COUNTER), \ CM_COUNTER_ATTR(lap, _group, CM_LAP_COUNTER), \ CM_COUNTER_ATTR(apr, _group, CM_APR_COUNTER), \ }; \ static struct attribute *cm_counter_attrs_##_group[] = { \ &cm_counter_attr_##_group[0].attr.attr, \ &cm_counter_attr_##_group[1].attr.attr, \ &cm_counter_attr_##_group[2].attr.attr, \ &cm_counter_attr_##_group[3].attr.attr, \ &cm_counter_attr_##_group[4].attr.attr, \ &cm_counter_attr_##_group[5].attr.attr, \ &cm_counter_attr_##_group[6].attr.attr, \ &cm_counter_attr_##_group[7].attr.attr, \ &cm_counter_attr_##_group[8].attr.attr, \ &cm_counter_attr_##_group[9].attr.attr, \ &cm_counter_attr_##_group[10].attr.attr, \ NULL, \ }; \ static const struct attribute_group cm_counter_group_##_group = { \ .name = _name, \ .attrs = cm_counter_attrs_##_group, \ }; CM_COUNTER_GROUP(CM_XMIT, "cm_tx_msgs") CM_COUNTER_GROUP(CM_XMIT_RETRIES, "cm_tx_retries") CM_COUNTER_GROUP(CM_RECV, "cm_rx_msgs") CM_COUNTER_GROUP(CM_RECV_DUPLICATES, "cm_rx_duplicates") static const struct attribute_group *cm_counter_groups[] = { &cm_counter_group_CM_XMIT, &cm_counter_group_CM_XMIT_RETRIES, &cm_counter_group_CM_RECV, &cm_counter_group_CM_RECV_DUPLICATES, NULL, }; static int cm_add_one(struct ib_device *ib_device) { struct cm_device *cm_dev; struct cm_port *port; struct ib_mad_reg_req reg_req = { .mgmt_class = IB_MGMT_CLASS_CM, .mgmt_class_version = IB_CM_CLASS_VERSION, }; struct ib_port_modify port_modify = { .set_port_cap_mask = IB_PORT_CM_SUP }; unsigned long flags; int ret; int count = 0; u32 i; cm_dev = kzalloc(struct_size(cm_dev, port, ib_device->phys_port_cnt), GFP_KERNEL); if (!cm_dev) return -ENOMEM; kref_init(&cm_dev->kref); rwlock_init(&cm_dev->mad_agent_lock); cm_dev->ib_device = ib_device; cm_dev->ack_delay = ib_device->attrs.local_ca_ack_delay; cm_dev->going_down = 0; ib_set_client_data(ib_device, &cm_client, cm_dev); set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); rdma_for_each_port (ib_device, i) { if (!rdma_cap_ib_cm(ib_device, i)) continue; port = kzalloc(sizeof *port, GFP_KERNEL); if (!port) { ret = -ENOMEM; goto error1; } cm_dev->port[i-1] = port; port->cm_dev = cm_dev; port->port_num = i; ret = ib_port_register_client_groups(ib_device, i, cm_counter_groups); if (ret) goto error1; port->mad_agent = ib_register_mad_agent(ib_device, i, IB_QPT_GSI, ®_req, 0, cm_send_handler, cm_recv_handler, port, 0); if (IS_ERR(port->mad_agent)) { ret = PTR_ERR(port->mad_agent); goto error2; } port->rep_agent = ib_register_mad_agent(ib_device, i, IB_QPT_GSI, NULL, 0, cm_send_handler, NULL, port, 0); if (IS_ERR(port->rep_agent)) { ret = PTR_ERR(port->rep_agent); goto error3; } ret = ib_modify_port(ib_device, i, 0, &port_modify); if (ret) goto error4; count++; } if (!count) { ret = -EOPNOTSUPP; goto free; } write_lock_irqsave(&cm.device_lock, flags); list_add_tail(&cm_dev->list, &cm.device_list); write_unlock_irqrestore(&cm.device_lock, flags); return 0; error4: ib_unregister_mad_agent(port->rep_agent); error3: ib_unregister_mad_agent(port->mad_agent); error2: ib_port_unregister_client_groups(ib_device, i, cm_counter_groups); error1: port_modify.set_port_cap_mask = 0; port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; while (--i) { if (!rdma_cap_ib_cm(ib_device, i)) continue; port = cm_dev->port[i-1]; ib_modify_port(ib_device, port->port_num, 0, &port_modify); ib_unregister_mad_agent(port->rep_agent); ib_unregister_mad_agent(port->mad_agent); ib_port_unregister_client_groups(ib_device, i, cm_counter_groups); } free: cm_device_put(cm_dev); return ret; } static void cm_remove_one(struct ib_device *ib_device, void *client_data) { struct cm_device *cm_dev = client_data; struct cm_port *port; struct ib_port_modify port_modify = { .clr_port_cap_mask = IB_PORT_CM_SUP }; unsigned long flags; u32 i; write_lock_irqsave(&cm.device_lock, flags); list_del(&cm_dev->list); write_unlock_irqrestore(&cm.device_lock, flags); spin_lock_irq(&cm.lock); cm_dev->going_down = 1; spin_unlock_irq(&cm.lock); rdma_for_each_port (ib_device, i) { struct ib_mad_agent *mad_agent; struct ib_mad_agent *rep_agent; if (!rdma_cap_ib_cm(ib_device, i)) continue; port = cm_dev->port[i-1]; mad_agent = port->mad_agent; rep_agent = port->rep_agent; ib_modify_port(ib_device, port->port_num, 0, &port_modify); /* * We flush the queue here after the going_down set, this * verify that no new works will be queued in the recv handler, * after that we can call the unregister_mad_agent */ flush_workqueue(cm.wq); /* * The above ensures no call paths from the work are running, * the remaining paths all take the mad_agent_lock. */ write_lock(&cm_dev->mad_agent_lock); port->mad_agent = NULL; port->rep_agent = NULL; write_unlock(&cm_dev->mad_agent_lock); ib_unregister_mad_agent(mad_agent); ib_unregister_mad_agent(rep_agent); ib_port_unregister_client_groups(ib_device, i, cm_counter_groups); } cm_device_put(cm_dev); } static int __init ib_cm_init(void) { int ret; INIT_LIST_HEAD(&cm.device_list); rwlock_init(&cm.device_lock); spin_lock_init(&cm.lock); cm.listen_service_table = RB_ROOT; cm.listen_service_id = be64_to_cpu(IB_CM_ASSIGN_SERVICE_ID); cm.remote_id_table = RB_ROOT; cm.remote_qp_table = RB_ROOT; cm.remote_sidr_table = RB_ROOT; xa_init_flags(&cm.local_id_table, XA_FLAGS_ALLOC); get_random_bytes(&cm.random_id_operand, sizeof cm.random_id_operand); INIT_LIST_HEAD(&cm.timewait_list); cm.wq = alloc_workqueue("ib_cm", 0, 1); if (!cm.wq) { ret = -ENOMEM; goto error2; } ret = ib_register_client(&cm_client); if (ret) goto error3; return 0; error3: destroy_workqueue(cm.wq); error2: return ret; } static void __exit ib_cm_cleanup(void) { struct cm_timewait_info *timewait_info, *tmp; spin_lock_irq(&cm.lock); list_for_each_entry(timewait_info, &cm.timewait_list, list) cancel_delayed_work(&timewait_info->work.work); spin_unlock_irq(&cm.lock); ib_unregister_client(&cm_client); destroy_workqueue(cm.wq); list_for_each_entry_safe(timewait_info, tmp, &cm.timewait_list, list) { list_del(&timewait_info->list); kfree(timewait_info); } WARN_ON(!xa_empty(&cm.local_id_table)); } module_init(ib_cm_init); module_exit(ib_cm_cleanup); |
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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 | // SPDX-License-Identifier: GPL-2.0-only /* * mm/userfaultfd.c * * Copyright (C) 2015 Red Hat, Inc. */ #include <linux/mm.h> #include <linux/sched/signal.h> #include <linux/pagemap.h> #include <linux/rmap.h> #include <linux/swap.h> #include <linux/swapops.h> #include <linux/userfaultfd_k.h> #include <linux/mmu_notifier.h> #include <linux/hugetlb.h> #include <linux/shmem_fs.h> #include <asm/tlbflush.h> #include <asm/tlb.h> #include "internal.h" #include "swap.h" static __always_inline bool validate_dst_vma(struct vm_area_struct *dst_vma, unsigned long dst_end) { /* Make sure that the dst range is fully within dst_vma. */ if (dst_end > dst_vma->vm_end) return false; /* * Check the vma is registered in uffd, this is required to * enforce the VM_MAYWRITE check done at uffd registration * time. */ if (!dst_vma->vm_userfaultfd_ctx.ctx) return false; return true; } static __always_inline struct vm_area_struct *find_vma_and_prepare_anon(struct mm_struct *mm, unsigned long addr) { struct vm_area_struct *vma; mmap_assert_locked(mm); vma = vma_lookup(mm, addr); if (!vma) vma = ERR_PTR(-ENOENT); else if (!(vma->vm_flags & VM_SHARED) && unlikely(anon_vma_prepare(vma))) vma = ERR_PTR(-ENOMEM); return vma; } #ifdef CONFIG_PER_VMA_LOCK /* * uffd_lock_vma() - Lookup and lock vma corresponding to @address. * @mm: mm to search vma in. * @address: address that the vma should contain. * * Should be called without holding mmap_lock. * * Return: A locked vma containing @address, -ENOENT if no vma is found, or * -ENOMEM if anon_vma couldn't be allocated. */ static struct vm_area_struct *uffd_lock_vma(struct mm_struct *mm, unsigned long address) { struct vm_area_struct *vma; vma = lock_vma_under_rcu(mm, address); if (vma) { /* * We know we're going to need to use anon_vma, so check * that early. */ if (!(vma->vm_flags & VM_SHARED) && unlikely(!vma->anon_vma)) vma_end_read(vma); else return vma; } mmap_read_lock(mm); vma = find_vma_and_prepare_anon(mm, address); if (!IS_ERR(vma)) { bool locked = vma_start_read_locked(vma); if (!locked) vma = ERR_PTR(-EAGAIN); } mmap_read_unlock(mm); return vma; } static struct vm_area_struct *uffd_mfill_lock(struct mm_struct *dst_mm, unsigned long dst_start, unsigned long len) { struct vm_area_struct *dst_vma; dst_vma = uffd_lock_vma(dst_mm, dst_start); if (IS_ERR(dst_vma) || validate_dst_vma(dst_vma, dst_start + len)) return dst_vma; vma_end_read(dst_vma); return ERR_PTR(-ENOENT); } static void uffd_mfill_unlock(struct vm_area_struct *vma) { vma_end_read(vma); } #else static struct vm_area_struct *uffd_mfill_lock(struct mm_struct *dst_mm, unsigned long dst_start, unsigned long len) { struct vm_area_struct *dst_vma; mmap_read_lock(dst_mm); dst_vma = find_vma_and_prepare_anon(dst_mm, dst_start); if (IS_ERR(dst_vma)) goto out_unlock; if (validate_dst_vma(dst_vma, dst_start + len)) return dst_vma; dst_vma = ERR_PTR(-ENOENT); out_unlock: mmap_read_unlock(dst_mm); return dst_vma; } static void uffd_mfill_unlock(struct vm_area_struct *vma) { mmap_read_unlock(vma->vm_mm); } #endif /* Check if dst_addr is outside of file's size. Must be called with ptl held. */ static bool mfill_file_over_size(struct vm_area_struct *dst_vma, unsigned long dst_addr) { struct inode *inode; pgoff_t offset, max_off; if (!dst_vma->vm_file) return false; inode = dst_vma->vm_file->f_inode; offset = linear_page_index(dst_vma, dst_addr); max_off = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE); return offset >= max_off; } /* * Install PTEs, to map dst_addr (within dst_vma) to page. * * This function handles both MCOPY_ATOMIC_NORMAL and _CONTINUE for both shmem * and anon, and for both shared and private VMAs. */ int mfill_atomic_install_pte(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr, struct page *page, bool newly_allocated, uffd_flags_t flags) { int ret; struct mm_struct *dst_mm = dst_vma->vm_mm; pte_t _dst_pte, *dst_pte; bool writable = dst_vma->vm_flags & VM_WRITE; bool vm_shared = dst_vma->vm_flags & VM_SHARED; spinlock_t *ptl; struct folio *folio = page_folio(page); bool page_in_cache = folio_mapping(folio); _dst_pte = mk_pte(page, dst_vma->vm_page_prot); _dst_pte = pte_mkdirty(_dst_pte); if (page_in_cache && !vm_shared) writable = false; if (writable) _dst_pte = pte_mkwrite(_dst_pte, dst_vma); if (flags & MFILL_ATOMIC_WP) _dst_pte = pte_mkuffd_wp(_dst_pte); ret = -EAGAIN; dst_pte = pte_offset_map_lock(dst_mm, dst_pmd, dst_addr, &ptl); if (!dst_pte) goto out; if (mfill_file_over_size(dst_vma, dst_addr)) { ret = -EFAULT; goto out_unlock; } ret = -EEXIST; /* * We allow to overwrite a pte marker: consider when both MISSING|WP * registered, we firstly wr-protect a none pte which has no page cache * page backing it, then access the page. */ if (!pte_none_mostly(ptep_get(dst_pte))) goto out_unlock; if (page_in_cache) { /* Usually, cache pages are already added to LRU */ if (newly_allocated) folio_add_lru(folio); folio_add_file_rmap_pte(folio, page, dst_vma); } else { folio_add_new_anon_rmap(folio, dst_vma, dst_addr, RMAP_EXCLUSIVE); folio_add_lru_vma(folio, dst_vma); } /* * Must happen after rmap, as mm_counter() checks mapping (via * PageAnon()), which is set by __page_set_anon_rmap(). */ inc_mm_counter(dst_mm, mm_counter(folio)); set_pte_at(dst_mm, dst_addr, dst_pte, _dst_pte); /* No need to invalidate - it was non-present before */ update_mmu_cache(dst_vma, dst_addr, dst_pte); ret = 0; out_unlock: pte_unmap_unlock(dst_pte, ptl); out: return ret; } static int mfill_atomic_pte_copy(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr, unsigned long src_addr, uffd_flags_t flags, struct folio **foliop) { void *kaddr; int ret; struct folio *folio; if (!*foliop) { ret = -ENOMEM; folio = vma_alloc_folio(GFP_HIGHUSER_MOVABLE, 0, dst_vma, dst_addr); if (!folio) goto out; kaddr = kmap_local_folio(folio, 0); /* * The read mmap_lock is held here. Despite the * mmap_lock being read recursive a deadlock is still * possible if a writer has taken a lock. For example: * * process A thread 1 takes read lock on own mmap_lock * process A thread 2 calls mmap, blocks taking write lock * process B thread 1 takes page fault, read lock on own mmap lock * process B thread 2 calls mmap, blocks taking write lock * process A thread 1 blocks taking read lock on process B * process B thread 1 blocks taking read lock on process A * * Disable page faults to prevent potential deadlock * and retry the copy outside the mmap_lock. */ pagefault_disable(); ret = copy_from_user(kaddr, (const void __user *) src_addr, PAGE_SIZE); pagefault_enable(); kunmap_local(kaddr); /* fallback to copy_from_user outside mmap_lock */ if (unlikely(ret)) { ret = -ENOENT; *foliop = folio; /* don't free the page */ goto out; } flush_dcache_folio(folio); } else { folio = *foliop; *foliop = NULL; } /* * The memory barrier inside __folio_mark_uptodate makes sure that * preceding stores to the page contents become visible before * the set_pte_at() write. */ __folio_mark_uptodate(folio); ret = -ENOMEM; if (mem_cgroup_charge(folio, dst_vma->vm_mm, GFP_KERNEL)) goto out_release; ret = mfill_atomic_install_pte(dst_pmd, dst_vma, dst_addr, &folio->page, true, flags); if (ret) goto out_release; out: return ret; out_release: folio_put(folio); goto out; } static int mfill_atomic_pte_zeroed_folio(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr) { struct folio *folio; int ret = -ENOMEM; folio = vma_alloc_zeroed_movable_folio(dst_vma, dst_addr); if (!folio) return ret; if (mem_cgroup_charge(folio, dst_vma->vm_mm, GFP_KERNEL)) goto out_put; /* * The memory barrier inside __folio_mark_uptodate makes sure that * zeroing out the folio become visible before mapping the page * using set_pte_at(). See do_anonymous_page(). */ __folio_mark_uptodate(folio); ret = mfill_atomic_install_pte(dst_pmd, dst_vma, dst_addr, &folio->page, true, 0); if (ret) goto out_put; return 0; out_put: folio_put(folio); return ret; } static int mfill_atomic_pte_zeropage(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr) { pte_t _dst_pte, *dst_pte; spinlock_t *ptl; int ret; if (mm_forbids_zeropage(dst_vma->vm_mm)) return mfill_atomic_pte_zeroed_folio(dst_pmd, dst_vma, dst_addr); _dst_pte = pte_mkspecial(pfn_pte(my_zero_pfn(dst_addr), dst_vma->vm_page_prot)); ret = -EAGAIN; dst_pte = pte_offset_map_lock(dst_vma->vm_mm, dst_pmd, dst_addr, &ptl); if (!dst_pte) goto out; if (mfill_file_over_size(dst_vma, dst_addr)) { ret = -EFAULT; goto out_unlock; } ret = -EEXIST; if (!pte_none(ptep_get(dst_pte))) goto out_unlock; set_pte_at(dst_vma->vm_mm, dst_addr, dst_pte, _dst_pte); /* No need to invalidate - it was non-present before */ update_mmu_cache(dst_vma, dst_addr, dst_pte); ret = 0; out_unlock: pte_unmap_unlock(dst_pte, ptl); out: return ret; } /* Handles UFFDIO_CONTINUE for all shmem VMAs (shared or private). */ static int mfill_atomic_pte_continue(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr, uffd_flags_t flags) { struct inode *inode = file_inode(dst_vma->vm_file); pgoff_t pgoff = linear_page_index(dst_vma, dst_addr); struct folio *folio; struct page *page; int ret; ret = shmem_get_folio(inode, pgoff, 0, &folio, SGP_NOALLOC); /* Our caller expects us to return -EFAULT if we failed to find folio */ if (ret == -ENOENT) ret = -EFAULT; if (ret) goto out; if (!folio) { ret = -EFAULT; goto out; } page = folio_file_page(folio, pgoff); if (PageHWPoison(page)) { ret = -EIO; goto out_release; } ret = mfill_atomic_install_pte(dst_pmd, dst_vma, dst_addr, page, false, flags); if (ret) goto out_release; folio_unlock(folio); ret = 0; out: return ret; out_release: folio_unlock(folio); folio_put(folio); goto out; } /* Handles UFFDIO_POISON for all non-hugetlb VMAs. */ static int mfill_atomic_pte_poison(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr, uffd_flags_t flags) { int ret; struct mm_struct *dst_mm = dst_vma->vm_mm; pte_t _dst_pte, *dst_pte; spinlock_t *ptl; _dst_pte = make_pte_marker(PTE_MARKER_POISONED); ret = -EAGAIN; dst_pte = pte_offset_map_lock(dst_mm, dst_pmd, dst_addr, &ptl); if (!dst_pte) goto out; if (mfill_file_over_size(dst_vma, dst_addr)) { ret = -EFAULT; goto out_unlock; } ret = -EEXIST; /* Refuse to overwrite any PTE, even a PTE marker (e.g. UFFD WP). */ if (!pte_none(ptep_get(dst_pte))) goto out_unlock; set_pte_at(dst_mm, dst_addr, dst_pte, _dst_pte); /* No need to invalidate - it was non-present before */ update_mmu_cache(dst_vma, dst_addr, dst_pte); ret = 0; out_unlock: pte_unmap_unlock(dst_pte, ptl); out: return ret; } static pmd_t *mm_alloc_pmd(struct mm_struct *mm, unsigned long address) { pgd_t *pgd; p4d_t *p4d; pud_t *pud; pgd = pgd_offset(mm, address); p4d = p4d_alloc(mm, pgd, address); if (!p4d) return NULL; pud = pud_alloc(mm, p4d, address); if (!pud) return NULL; /* * Note that we didn't run this because the pmd was * missing, the *pmd may be already established and in * turn it may also be a trans_huge_pmd. */ return pmd_alloc(mm, pud, address); } #ifdef CONFIG_HUGETLB_PAGE /* * mfill_atomic processing for HUGETLB vmas. Note that this routine is * called with either vma-lock or mmap_lock held, it will release the lock * before returning. */ static __always_inline ssize_t mfill_atomic_hugetlb( struct userfaultfd_ctx *ctx, struct vm_area_struct *dst_vma, unsigned long dst_start, unsigned long src_start, unsigned long len, uffd_flags_t flags) { struct mm_struct *dst_mm = dst_vma->vm_mm; ssize_t err; pte_t *dst_pte; unsigned long src_addr, dst_addr; long copied; struct folio *folio; unsigned long vma_hpagesize; pgoff_t idx; u32 hash; struct address_space *mapping; /* * There is no default zero huge page for all huge page sizes as * supported by hugetlb. A PMD_SIZE huge pages may exist as used * by THP. Since we can not reliably insert a zero page, this * feature is not supported. */ if (uffd_flags_mode_is(flags, MFILL_ATOMIC_ZEROPAGE)) { up_read(&ctx->map_changing_lock); uffd_mfill_unlock(dst_vma); return -EINVAL; } src_addr = src_start; dst_addr = dst_start; copied = 0; folio = NULL; vma_hpagesize = vma_kernel_pagesize(dst_vma); /* * Validate alignment based on huge page size */ err = -EINVAL; if (dst_start & (vma_hpagesize - 1) || len & (vma_hpagesize - 1)) goto out_unlock; retry: /* * On routine entry dst_vma is set. If we had to drop mmap_lock and * retry, dst_vma will be set to NULL and we must lookup again. */ if (!dst_vma) { dst_vma = uffd_mfill_lock(dst_mm, dst_start, len); if (IS_ERR(dst_vma)) { err = PTR_ERR(dst_vma); goto out; } err = -ENOENT; if (!is_vm_hugetlb_page(dst_vma)) goto out_unlock_vma; err = -EINVAL; if (vma_hpagesize != vma_kernel_pagesize(dst_vma)) goto out_unlock_vma; /* * If memory mappings are changing because of non-cooperative * operation (e.g. mremap) running in parallel, bail out and * request the user to retry later */ down_read(&ctx->map_changing_lock); err = -EAGAIN; if (atomic_read(&ctx->mmap_changing)) goto out_unlock; } while (src_addr < src_start + len) { VM_WARN_ON_ONCE(dst_addr >= dst_start + len); /* * Serialize via vma_lock and hugetlb_fault_mutex. * vma_lock ensures the dst_pte remains valid even * in the case of shared pmds. fault mutex prevents * races with other faulting threads. */ idx = linear_page_index(dst_vma, dst_addr); mapping = dst_vma->vm_file->f_mapping; hash = hugetlb_fault_mutex_hash(mapping, idx); mutex_lock(&hugetlb_fault_mutex_table[hash]); hugetlb_vma_lock_read(dst_vma); err = -ENOMEM; dst_pte = huge_pte_alloc(dst_mm, dst_vma, dst_addr, vma_hpagesize); if (!dst_pte) { hugetlb_vma_unlock_read(dst_vma); mutex_unlock(&hugetlb_fault_mutex_table[hash]); goto out_unlock; } if (!uffd_flags_mode_is(flags, MFILL_ATOMIC_CONTINUE) && !huge_pte_none_mostly(huge_ptep_get(dst_mm, dst_addr, dst_pte))) { err = -EEXIST; hugetlb_vma_unlock_read(dst_vma); mutex_unlock(&hugetlb_fault_mutex_table[hash]); goto out_unlock; } err = hugetlb_mfill_atomic_pte(dst_pte, dst_vma, dst_addr, src_addr, flags, &folio); hugetlb_vma_unlock_read(dst_vma); mutex_unlock(&hugetlb_fault_mutex_table[hash]); cond_resched(); if (unlikely(err == -ENOENT)) { up_read(&ctx->map_changing_lock); uffd_mfill_unlock(dst_vma); VM_WARN_ON_ONCE(!folio); err = copy_folio_from_user(folio, (const void __user *)src_addr, true); if (unlikely(err)) { err = -EFAULT; goto out; } dst_vma = NULL; goto retry; } else VM_WARN_ON_ONCE(folio); if (!err) { dst_addr += vma_hpagesize; src_addr += vma_hpagesize; copied += vma_hpagesize; if (fatal_signal_pending(current)) err = -EINTR; } if (err) break; } out_unlock: up_read(&ctx->map_changing_lock); out_unlock_vma: uffd_mfill_unlock(dst_vma); out: if (folio) folio_put(folio); VM_WARN_ON_ONCE(copied < 0); VM_WARN_ON_ONCE(err > 0); VM_WARN_ON_ONCE(!copied && !err); return copied ? copied : err; } #else /* !CONFIG_HUGETLB_PAGE */ /* fail at build time if gcc attempts to use this */ extern ssize_t mfill_atomic_hugetlb(struct userfaultfd_ctx *ctx, struct vm_area_struct *dst_vma, unsigned long dst_start, unsigned long src_start, unsigned long len, uffd_flags_t flags); #endif /* CONFIG_HUGETLB_PAGE */ static __always_inline ssize_t mfill_atomic_pte(pmd_t *dst_pmd, struct vm_area_struct *dst_vma, unsigned long dst_addr, unsigned long src_addr, uffd_flags_t flags, struct folio **foliop) { ssize_t err; if (uffd_flags_mode_is(flags, MFILL_ATOMIC_CONTINUE)) { return mfill_atomic_pte_continue(dst_pmd, dst_vma, dst_addr, flags); } else if (uffd_flags_mode_is(flags, MFILL_ATOMIC_POISON)) { return mfill_atomic_pte_poison(dst_pmd, dst_vma, dst_addr, flags); } /* * The normal page fault path for a shmem will invoke the * fault, fill the hole in the file and COW it right away. The * result generates plain anonymous memory. So when we are * asked to fill an hole in a MAP_PRIVATE shmem mapping, we'll * generate anonymous memory directly without actually filling * the hole. For the MAP_PRIVATE case the robustness check * only happens in the pagetable (to verify it's still none) * and not in the radix tree. */ if (!(dst_vma->vm_flags & VM_SHARED)) { if (uffd_flags_mode_is(flags, MFILL_ATOMIC_COPY)) err = mfill_atomic_pte_copy(dst_pmd, dst_vma, dst_addr, src_addr, flags, foliop); else err = mfill_atomic_pte_zeropage(dst_pmd, dst_vma, dst_addr); } else { err = shmem_mfill_atomic_pte(dst_pmd, dst_vma, dst_addr, src_addr, flags, foliop); } return err; } static __always_inline ssize_t mfill_atomic(struct userfaultfd_ctx *ctx, unsigned long dst_start, unsigned long src_start, unsigned long len, uffd_flags_t flags) { struct mm_struct *dst_mm = ctx->mm; struct vm_area_struct *dst_vma; ssize_t err; pmd_t *dst_pmd; unsigned long src_addr, dst_addr; long copied; struct folio *folio; /* * Sanitize the command parameters: */ VM_WARN_ON_ONCE(dst_start & ~PAGE_MASK); VM_WARN_ON_ONCE(len & ~PAGE_MASK); /* Does the address range wrap, or is the span zero-sized? */ VM_WARN_ON_ONCE(src_start + len <= src_start); VM_WARN_ON_ONCE(dst_start + len <= dst_start); src_addr = src_start; dst_addr = dst_start; copied = 0; folio = NULL; retry: /* * Make sure the vma is not shared, that the dst range is * both valid and fully within a single existing vma. */ dst_vma = uffd_mfill_lock(dst_mm, dst_start, len); if (IS_ERR(dst_vma)) { err = PTR_ERR(dst_vma); goto out; } /* * If memory mappings are changing because of non-cooperative * operation (e.g. mremap) running in parallel, bail out and * request the user to retry later */ down_read(&ctx->map_changing_lock); err = -EAGAIN; if (atomic_read(&ctx->mmap_changing)) goto out_unlock; err = -EINVAL; /* * shmem_zero_setup is invoked in mmap for MAP_ANONYMOUS|MAP_SHARED but * it will overwrite vm_ops, so vma_is_anonymous must return false. */ if (WARN_ON_ONCE(vma_is_anonymous(dst_vma) && dst_vma->vm_flags & VM_SHARED)) goto out_unlock; /* * validate 'mode' now that we know the dst_vma: don't allow * a wrprotect copy if the userfaultfd didn't register as WP. */ if ((flags & MFILL_ATOMIC_WP) && !(dst_vma->vm_flags & VM_UFFD_WP)) goto out_unlock; /* * If this is a HUGETLB vma, pass off to appropriate routine */ if (is_vm_hugetlb_page(dst_vma)) return mfill_atomic_hugetlb(ctx, dst_vma, dst_start, src_start, len, flags); if (!vma_is_anonymous(dst_vma) && !vma_is_shmem(dst_vma)) goto out_unlock; if (!vma_is_shmem(dst_vma) && uffd_flags_mode_is(flags, MFILL_ATOMIC_CONTINUE)) goto out_unlock; while (src_addr < src_start + len) { pmd_t dst_pmdval; VM_WARN_ON_ONCE(dst_addr >= dst_start + len); dst_pmd = mm_alloc_pmd(dst_mm, dst_addr); if (unlikely(!dst_pmd)) { err = -ENOMEM; break; } dst_pmdval = pmdp_get_lockless(dst_pmd); if (unlikely(pmd_none(dst_pmdval)) && unlikely(__pte_alloc(dst_mm, dst_pmd))) { err = -ENOMEM; break; } dst_pmdval = pmdp_get_lockless(dst_pmd); /* * If the dst_pmd is THP don't override it and just be strict. * (This includes the case where the PMD used to be THP and * changed back to none after __pte_alloc().) */ if (unlikely(!pmd_present(dst_pmdval) || pmd_trans_huge(dst_pmdval))) { err = -EEXIST; break; } if (unlikely(pmd_bad(dst_pmdval))) { err = -EFAULT; break; } /* * For shmem mappings, khugepaged is allowed to remove page * tables under us; pte_offset_map_lock() will deal with that. */ err = mfill_atomic_pte(dst_pmd, dst_vma, dst_addr, src_addr, flags, &folio); cond_resched(); if (unlikely(err == -ENOENT)) { void *kaddr; up_read(&ctx->map_changing_lock); uffd_mfill_unlock(dst_vma); VM_WARN_ON_ONCE(!folio); kaddr = kmap_local_folio(folio, 0); err = copy_from_user(kaddr, (const void __user *) src_addr, PAGE_SIZE); kunmap_local(kaddr); if (unlikely(err)) { err = -EFAULT; goto out; } flush_dcache_folio(folio); goto retry; } else VM_WARN_ON_ONCE(folio); if (!err) { dst_addr += PAGE_SIZE; src_addr += PAGE_SIZE; copied += PAGE_SIZE; if (fatal_signal_pending(current)) err = -EINTR; } if (err) break; } out_unlock: up_read(&ctx->map_changing_lock); uffd_mfill_unlock(dst_vma); out: if (folio) folio_put(folio); VM_WARN_ON_ONCE(copied < 0); VM_WARN_ON_ONCE(err > 0); VM_WARN_ON_ONCE(!copied && !err); return copied ? copied : err; } ssize_t mfill_atomic_copy(struct userfaultfd_ctx *ctx, unsigned long dst_start, unsigned long src_start, unsigned long len, uffd_flags_t flags) { return mfill_atomic(ctx, dst_start, src_start, len, uffd_flags_set_mode(flags, MFILL_ATOMIC_COPY)); } ssize_t mfill_atomic_zeropage(struct userfaultfd_ctx *ctx, unsigned long start, unsigned long len) { return mfill_atomic(ctx, start, 0, len, uffd_flags_set_mode(0, MFILL_ATOMIC_ZEROPAGE)); } ssize_t mfill_atomic_continue(struct userfaultfd_ctx *ctx, unsigned long start, unsigned long len, uffd_flags_t flags) { /* * A caller might reasonably assume that UFFDIO_CONTINUE contains an * smp_wmb() to ensure that any writes to the about-to-be-mapped page by * the thread doing the UFFDIO_CONTINUE are guaranteed to be visible to * subsequent loads from the page through the newly mapped address range. */ smp_wmb(); return mfill_atomic(ctx, start, 0, len, uffd_flags_set_mode(flags, MFILL_ATOMIC_CONTINUE)); } ssize_t mfill_atomic_poison(struct userfaultfd_ctx *ctx, unsigned long start, unsigned long len, uffd_flags_t flags) { return mfill_atomic(ctx, start, 0, len, uffd_flags_set_mode(flags, MFILL_ATOMIC_POISON)); } long uffd_wp_range(struct vm_area_struct *dst_vma, unsigned long start, unsigned long len, bool enable_wp) { unsigned int mm_cp_flags; struct mmu_gather tlb; long ret; VM_WARN_ONCE(start < dst_vma->vm_start || start + len > dst_vma->vm_end, "The address range exceeds VMA boundary.\n"); if (enable_wp) mm_cp_flags = MM_CP_UFFD_WP; else mm_cp_flags = MM_CP_UFFD_WP_RESOLVE; /* * vma->vm_page_prot already reflects that uffd-wp is enabled for this * VMA (see userfaultfd_set_vm_flags()) and that all PTEs are supposed * to be write-protected as default whenever protection changes. * Try upgrading write permissions manually. */ if (!enable_wp && vma_wants_manual_pte_write_upgrade(dst_vma)) mm_cp_flags |= MM_CP_TRY_CHANGE_WRITABLE; tlb_gather_mmu(&tlb, dst_vma->vm_mm); ret = change_protection(&tlb, dst_vma, start, start + len, mm_cp_flags); tlb_finish_mmu(&tlb); return ret; } int mwriteprotect_range(struct userfaultfd_ctx *ctx, unsigned long start, unsigned long len, bool enable_wp) { struct mm_struct *dst_mm = ctx->mm; unsigned long end = start + len; unsigned long _start, _end; struct vm_area_struct *dst_vma; unsigned long page_mask; long err; VMA_ITERATOR(vmi, dst_mm, start); /* * Sanitize the command parameters: */ VM_WARN_ON_ONCE(start & ~PAGE_MASK); VM_WARN_ON_ONCE(len & ~PAGE_MASK); /* Does the address range wrap, or is the span zero-sized? */ VM_WARN_ON_ONCE(start + len <= start); mmap_read_lock(dst_mm); /* * If memory mappings are changing because of non-cooperative * operation (e.g. mremap) running in parallel, bail out and * request the user to retry later */ down_read(&ctx->map_changing_lock); err = -EAGAIN; if (atomic_read(&ctx->mmap_changing)) goto out_unlock; err = -ENOENT; for_each_vma_range(vmi, dst_vma, end) { if (!userfaultfd_wp(dst_vma)) { err = -ENOENT; break; } if (is_vm_hugetlb_page(dst_vma)) { err = -EINVAL; page_mask = vma_kernel_pagesize(dst_vma) - 1; if ((start & page_mask) || (len & page_mask)) break; } _start = max(dst_vma->vm_start, start); _end = min(dst_vma->vm_end, end); err = uffd_wp_range(dst_vma, _start, _end - _start, enable_wp); /* Return 0 on success, <0 on failures */ if (err < 0) break; err = 0; } out_unlock: up_read(&ctx->map_changing_lock); mmap_read_unlock(dst_mm); return err; } void double_pt_lock(spinlock_t *ptl1, spinlock_t *ptl2) __acquires(ptl1) __acquires(ptl2) { if (ptl1 > ptl2) swap(ptl1, ptl2); /* lock in virtual address order to avoid lock inversion */ spin_lock(ptl1); if (ptl1 != ptl2) spin_lock_nested(ptl2, SINGLE_DEPTH_NESTING); else __acquire(ptl2); } void double_pt_unlock(spinlock_t *ptl1, spinlock_t *ptl2) __releases(ptl1) __releases(ptl2) { spin_unlock(ptl1); if (ptl1 != ptl2) spin_unlock(ptl2); else __release(ptl2); } static inline bool is_pte_pages_stable(pte_t *dst_pte, pte_t *src_pte, pte_t orig_dst_pte, pte_t orig_src_pte, pmd_t *dst_pmd, pmd_t dst_pmdval) { return pte_same(ptep_get(src_pte), orig_src_pte) && pte_same(ptep_get(dst_pte), orig_dst_pte) && pmd_same(dst_pmdval, pmdp_get_lockless(dst_pmd)); } /* * Checks if the two ptes and the corresponding folio are eligible for batched * move. If so, then returns pointer to the locked folio. Otherwise, returns NULL. * * NOTE: folio's reference is not required as the whole operation is within * PTL's critical section. */ static struct folio *check_ptes_for_batched_move(struct vm_area_struct *src_vma, unsigned long src_addr, pte_t *src_pte, pte_t *dst_pte, struct anon_vma *src_anon_vma) { pte_t orig_dst_pte, orig_src_pte; struct folio *folio; orig_dst_pte = ptep_get(dst_pte); if (!pte_none(orig_dst_pte)) return NULL; orig_src_pte = ptep_get(src_pte); if (!pte_present(orig_src_pte) || is_zero_pfn(pte_pfn(orig_src_pte))) return NULL; folio = vm_normal_folio(src_vma, src_addr, orig_src_pte); if (!folio || !folio_trylock(folio)) return NULL; if (!PageAnonExclusive(&folio->page) || folio_test_large(folio) || folio_anon_vma(folio) != src_anon_vma) { folio_unlock(folio); return NULL; } return folio; } /* * Moves src folios to dst in a batch as long as they share the same * anon_vma as the first folio, are not large, and can successfully * take the lock via folio_trylock(). */ static long move_present_ptes(struct mm_struct *mm, struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma, unsigned long dst_addr, unsigned long src_addr, pte_t *dst_pte, pte_t *src_pte, pte_t orig_dst_pte, pte_t orig_src_pte, pmd_t *dst_pmd, pmd_t dst_pmdval, spinlock_t *dst_ptl, spinlock_t *src_ptl, struct folio **first_src_folio, unsigned long len, struct anon_vma *src_anon_vma) { int err = 0; struct folio *src_folio = *first_src_folio; unsigned long src_start = src_addr; unsigned long src_end; len = pmd_addr_end(dst_addr, dst_addr + len) - dst_addr; src_end = pmd_addr_end(src_addr, src_addr + len); flush_cache_range(src_vma, src_addr, src_end); double_pt_lock(dst_ptl, src_ptl); if (!is_pte_pages_stable(dst_pte, src_pte, orig_dst_pte, orig_src_pte, dst_pmd, dst_pmdval)) { err = -EAGAIN; goto out; } if (folio_test_large(src_folio) || folio_maybe_dma_pinned(src_folio) || !PageAnonExclusive(&src_folio->page)) { err = -EBUSY; goto out; } /* It's safe to drop the reference now as the page-table is holding one. */ folio_put(*first_src_folio); *first_src_folio = NULL; arch_enter_lazy_mmu_mode(); while (true) { orig_src_pte = ptep_get_and_clear(mm, src_addr, src_pte); /* Folio got pinned from under us. Put it back and fail the move. */ if (folio_maybe_dma_pinned(src_folio)) { set_pte_at(mm, src_addr, src_pte, orig_src_pte); err = -EBUSY; break; } folio_move_anon_rmap(src_folio, dst_vma); src_folio->index = linear_page_index(dst_vma, dst_addr); orig_dst_pte = folio_mk_pte(src_folio, dst_vma->vm_page_prot); /* Set soft dirty bit so userspace can notice the pte was moved */ #ifdef CONFIG_MEM_SOFT_DIRTY orig_dst_pte = pte_mksoft_dirty(orig_dst_pte); #endif if (pte_dirty(orig_src_pte)) orig_dst_pte = pte_mkdirty(orig_dst_pte); orig_dst_pte = pte_mkwrite(orig_dst_pte, dst_vma); set_pte_at(mm, dst_addr, dst_pte, orig_dst_pte); src_addr += PAGE_SIZE; if (src_addr == src_end) break; dst_addr += PAGE_SIZE; dst_pte++; src_pte++; folio_unlock(src_folio); src_folio = check_ptes_for_batched_move(src_vma, src_addr, src_pte, dst_pte, src_anon_vma); if (!src_folio) break; } arch_leave_lazy_mmu_mode(); if (src_addr > src_start) flush_tlb_range(src_vma, src_start, src_addr); if (src_folio) folio_unlock(src_folio); out: double_pt_unlock(dst_ptl, src_ptl); return src_addr > src_start ? src_addr - src_start : err; } static int move_swap_pte(struct mm_struct *mm, struct vm_area_struct *dst_vma, unsigned long dst_addr, unsigned long src_addr, pte_t *dst_pte, pte_t *src_pte, pte_t orig_dst_pte, pte_t orig_src_pte, pmd_t *dst_pmd, pmd_t dst_pmdval, spinlock_t *dst_ptl, spinlock_t *src_ptl, struct folio *src_folio, struct swap_info_struct *si, swp_entry_t entry) { /* * Check if the folio still belongs to the target swap entry after * acquiring the lock. Folio can be freed in the swap cache while * not locked. */ if (src_folio && unlikely(!folio_test_swapcache(src_folio) || entry.val != src_folio->swap.val)) return -EAGAIN; double_pt_lock(dst_ptl, src_ptl); if (!is_pte_pages_stable(dst_pte, src_pte, orig_dst_pte, orig_src_pte, dst_pmd, dst_pmdval)) { double_pt_unlock(dst_ptl, src_ptl); return -EAGAIN; } /* * The src_folio resides in the swapcache, requiring an update to its * index and mapping to align with the dst_vma, where a swap-in may * occur and hit the swapcache after moving the PTE. */ if (src_folio) { folio_move_anon_rmap(src_folio, dst_vma); src_folio->index = linear_page_index(dst_vma, dst_addr); } else { /* * Check if the swap entry is cached after acquiring the src_pte * lock. Otherwise, we might miss a newly loaded swap cache folio. * * Check swap_map directly to minimize overhead, READ_ONCE is sufficient. * We are trying to catch newly added swap cache, the only possible case is * when a folio is swapped in and out again staying in swap cache, using the * same entry before the PTE check above. The PTL is acquired and released * twice, each time after updating the swap_map's flag. So holding * the PTL here ensures we see the updated value. False positive is possible, * e.g. SWP_SYNCHRONOUS_IO swapin may set the flag without touching the * cache, or during the tiny synchronization window between swap cache and * swap_map, but it will be gone very quickly, worst result is retry jitters. */ if (READ_ONCE(si->swap_map[swp_offset(entry)]) & SWAP_HAS_CACHE) { double_pt_unlock(dst_ptl, src_ptl); return -EAGAIN; } } orig_src_pte = ptep_get_and_clear(mm, src_addr, src_pte); #ifdef CONFIG_MEM_SOFT_DIRTY orig_src_pte = pte_swp_mksoft_dirty(orig_src_pte); #endif set_pte_at(mm, dst_addr, dst_pte, orig_src_pte); double_pt_unlock(dst_ptl, src_ptl); return PAGE_SIZE; } static int move_zeropage_pte(struct mm_struct *mm, struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma, unsigned long dst_addr, unsigned long src_addr, pte_t *dst_pte, pte_t *src_pte, pte_t orig_dst_pte, pte_t orig_src_pte, pmd_t *dst_pmd, pmd_t dst_pmdval, spinlock_t *dst_ptl, spinlock_t *src_ptl) { pte_t zero_pte; double_pt_lock(dst_ptl, src_ptl); if (!is_pte_pages_stable(dst_pte, src_pte, orig_dst_pte, orig_src_pte, dst_pmd, dst_pmdval)) { double_pt_unlock(dst_ptl, src_ptl); return -EAGAIN; } zero_pte = pte_mkspecial(pfn_pte(my_zero_pfn(dst_addr), dst_vma->vm_page_prot)); ptep_clear_flush(src_vma, src_addr, src_pte); set_pte_at(mm, dst_addr, dst_pte, zero_pte); double_pt_unlock(dst_ptl, src_ptl); return PAGE_SIZE; } /* * The mmap_lock for reading is held by the caller. Just move the page(s) * from src_pmd to dst_pmd if possible, and return number of bytes moved. * On failure, an error code is returned. */ static long move_pages_ptes(struct mm_struct *mm, pmd_t *dst_pmd, pmd_t *src_pmd, struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma, unsigned long dst_addr, unsigned long src_addr, unsigned long len, __u64 mode) { swp_entry_t entry; struct swap_info_struct *si = NULL; pte_t orig_src_pte, orig_dst_pte; pte_t src_folio_pte; spinlock_t *src_ptl, *dst_ptl; pte_t *src_pte = NULL; pte_t *dst_pte = NULL; pmd_t dummy_pmdval; pmd_t dst_pmdval; struct folio *src_folio = NULL; struct anon_vma *src_anon_vma = NULL; struct mmu_notifier_range range; long ret = 0; mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, mm, src_addr, src_addr + len); mmu_notifier_invalidate_range_start(&range); retry: /* * Use the maywrite version to indicate that dst_pte will be modified, * since dst_pte needs to be none, the subsequent pte_same() check * cannot prevent the dst_pte page from being freed concurrently, so we * also need to abtain dst_pmdval and recheck pmd_same() later. */ dst_pte = pte_offset_map_rw_nolock(mm, dst_pmd, dst_addr, &dst_pmdval, &dst_ptl); /* Retry if a huge pmd materialized from under us */ if (unlikely(!dst_pte)) { ret = -EAGAIN; goto out; } /* * Unlike dst_pte, the subsequent pte_same() check can ensure the * stability of the src_pte page, so there is no need to get pmdval, * just pass a dummy variable to it. */ src_pte = pte_offset_map_rw_nolock(mm, src_pmd, src_addr, &dummy_pmdval, &src_ptl); /* * We held the mmap_lock for reading so MADV_DONTNEED * can zap transparent huge pages under us, or the * transparent huge page fault can establish new * transparent huge pages under us. */ if (unlikely(!src_pte)) { ret = -EAGAIN; goto out; } /* Sanity checks before the operation */ if (pmd_none(*dst_pmd) || pmd_none(*src_pmd) || pmd_trans_huge(*dst_pmd) || pmd_trans_huge(*src_pmd)) { ret = -EINVAL; goto out; } spin_lock(dst_ptl); orig_dst_pte = ptep_get(dst_pte); spin_unlock(dst_ptl); if (!pte_none(orig_dst_pte)) { ret = -EEXIST; goto out; } spin_lock(src_ptl); orig_src_pte = ptep_get(src_pte); spin_unlock(src_ptl); if (pte_none(orig_src_pte)) { if (!(mode & UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES)) ret = -ENOENT; else /* nothing to do to move a hole */ ret = PAGE_SIZE; goto out; } /* If PTE changed after we locked the folio them start over */ if (src_folio && unlikely(!pte_same(src_folio_pte, orig_src_pte))) { ret = -EAGAIN; goto out; } if (pte_present(orig_src_pte)) { if (is_zero_pfn(pte_pfn(orig_src_pte))) { ret = move_zeropage_pte(mm, dst_vma, src_vma, dst_addr, src_addr, dst_pte, src_pte, orig_dst_pte, orig_src_pte, dst_pmd, dst_pmdval, dst_ptl, src_ptl); goto out; } /* * Pin and lock both source folio and anon_vma. Since we are in * RCU read section, we can't block, so on contention have to * unmap the ptes, obtain the lock and retry. */ if (!src_folio) { struct folio *folio; bool locked; /* * Pin the page while holding the lock to be sure the * page isn't freed under us */ spin_lock(src_ptl); if (!pte_same(orig_src_pte, ptep_get(src_pte))) { spin_unlock(src_ptl); ret = -EAGAIN; goto out; } folio = vm_normal_folio(src_vma, src_addr, orig_src_pte); if (!folio || !PageAnonExclusive(&folio->page)) { spin_unlock(src_ptl); ret = -EBUSY; goto out; } locked = folio_trylock(folio); /* * We avoid waiting for folio lock with a raised * refcount for large folios because extra refcounts * will result in split_folio() failing later and * retrying. If multiple tasks are trying to move a * large folio we can end up livelocking. */ if (!locked && folio_test_large(folio)) { spin_unlock(src_ptl); ret = -EAGAIN; goto out; } folio_get(folio); src_folio = folio; src_folio_pte = orig_src_pte; spin_unlock(src_ptl); if (!locked) { pte_unmap(src_pte); pte_unmap(dst_pte); src_pte = dst_pte = NULL; /* now we can block and wait */ folio_lock(src_folio); goto retry; } if (WARN_ON_ONCE(!folio_test_anon(src_folio))) { ret = -EBUSY; goto out; } } /* at this point we have src_folio locked */ if (folio_test_large(src_folio)) { /* split_folio() can block */ pte_unmap(src_pte); pte_unmap(dst_pte); src_pte = dst_pte = NULL; ret = split_folio(src_folio); if (ret) goto out; /* have to reacquire the folio after it got split */ folio_unlock(src_folio); folio_put(src_folio); src_folio = NULL; goto retry; } if (!src_anon_vma) { /* * folio_referenced walks the anon_vma chain * without the folio lock. Serialize against it with * the anon_vma lock, the folio lock is not enough. */ src_anon_vma = folio_get_anon_vma(src_folio); if (!src_anon_vma) { /* page was unmapped from under us */ ret = -EAGAIN; goto out; } if (!anon_vma_trylock_write(src_anon_vma)) { pte_unmap(src_pte); pte_unmap(dst_pte); src_pte = dst_pte = NULL; /* now we can block and wait */ anon_vma_lock_write(src_anon_vma); goto retry; } } ret = move_present_ptes(mm, dst_vma, src_vma, dst_addr, src_addr, dst_pte, src_pte, orig_dst_pte, orig_src_pte, dst_pmd, dst_pmdval, dst_ptl, src_ptl, &src_folio, len, src_anon_vma); } else { struct folio *folio = NULL; entry = pte_to_swp_entry(orig_src_pte); if (non_swap_entry(entry)) { if (is_migration_entry(entry)) { pte_unmap(src_pte); pte_unmap(dst_pte); src_pte = dst_pte = NULL; migration_entry_wait(mm, src_pmd, src_addr); ret = -EAGAIN; } else ret = -EFAULT; goto out; } if (!pte_swp_exclusive(orig_src_pte)) { ret = -EBUSY; goto out; } si = get_swap_device(entry); if (unlikely(!si)) { ret = -EAGAIN; goto out; } /* * Verify the existence of the swapcache. If present, the folio's * index and mapping must be updated even when the PTE is a swap * entry. The anon_vma lock is not taken during this process since * the folio has already been unmapped, and the swap entry is * exclusive, preventing rmap walks. * * For large folios, return -EBUSY immediately, as split_folio() * also returns -EBUSY when attempting to split unmapped large * folios in the swapcache. This issue needs to be resolved * separately to allow proper handling. */ if (!src_folio) folio = swap_cache_get_folio(entry); if (folio) { if (folio_test_large(folio)) { ret = -EBUSY; folio_put(folio); goto out; } src_folio = folio; src_folio_pte = orig_src_pte; if (!folio_trylock(src_folio)) { pte_unmap(src_pte); pte_unmap(dst_pte); src_pte = dst_pte = NULL; put_swap_device(si); si = NULL; /* now we can block and wait */ folio_lock(src_folio); goto retry; } } ret = move_swap_pte(mm, dst_vma, dst_addr, src_addr, dst_pte, src_pte, orig_dst_pte, orig_src_pte, dst_pmd, dst_pmdval, dst_ptl, src_ptl, src_folio, si, entry); } out: if (src_anon_vma) { anon_vma_unlock_write(src_anon_vma); put_anon_vma(src_anon_vma); } if (src_folio) { folio_unlock(src_folio); folio_put(src_folio); } /* * Unmap in reverse order (LIFO) to maintain proper kmap_local * index ordering when CONFIG_HIGHPTE is enabled. We mapped dst_pte * first, then src_pte, so we must unmap src_pte first, then dst_pte. */ if (src_pte) pte_unmap(src_pte); if (dst_pte) pte_unmap(dst_pte); mmu_notifier_invalidate_range_end(&range); if (si) put_swap_device(si); return ret; } #ifdef CONFIG_TRANSPARENT_HUGEPAGE static inline bool move_splits_huge_pmd(unsigned long dst_addr, unsigned long src_addr, unsigned long src_end) { return (src_addr & ~HPAGE_PMD_MASK) || (dst_addr & ~HPAGE_PMD_MASK) || src_end - src_addr < HPAGE_PMD_SIZE; } #else static inline bool move_splits_huge_pmd(unsigned long dst_addr, unsigned long src_addr, unsigned long src_end) { /* This is unreachable anyway, just to avoid warnings when HPAGE_PMD_SIZE==0 */ return false; } #endif static inline bool vma_move_compatible(struct vm_area_struct *vma) { return !(vma->vm_flags & (VM_PFNMAP | VM_IO | VM_HUGETLB | VM_MIXEDMAP | VM_SHADOW_STACK)); } static int validate_move_areas(struct userfaultfd_ctx *ctx, struct vm_area_struct *src_vma, struct vm_area_struct *dst_vma) { /* Only allow moving if both have the same access and protection */ if ((src_vma->vm_flags & VM_ACCESS_FLAGS) != (dst_vma->vm_flags & VM_ACCESS_FLAGS) || pgprot_val(src_vma->vm_page_prot) != pgprot_val(dst_vma->vm_page_prot)) return -EINVAL; /* Only allow moving if both are mlocked or both aren't */ if ((src_vma->vm_flags & VM_LOCKED) != (dst_vma->vm_flags & VM_LOCKED)) return -EINVAL; /* * For now, we keep it simple and only move between writable VMAs. * Access flags are equal, therefore cheching only the source is enough. */ if (!(src_vma->vm_flags & VM_WRITE)) return -EINVAL; /* Check if vma flags indicate content which can be moved */ if (!vma_move_compatible(src_vma) || !vma_move_compatible(dst_vma)) return -EINVAL; /* Ensure dst_vma is registered in uffd we are operating on */ if (!dst_vma->vm_userfaultfd_ctx.ctx || dst_vma->vm_userfaultfd_ctx.ctx != ctx) return -EINVAL; /* Only allow moving across anonymous vmas */ if (!vma_is_anonymous(src_vma) || !vma_is_anonymous(dst_vma)) return -EINVAL; return 0; } static __always_inline int find_vmas_mm_locked(struct mm_struct *mm, unsigned long dst_start, unsigned long src_start, struct vm_area_struct **dst_vmap, struct vm_area_struct **src_vmap) { struct vm_area_struct *vma; mmap_assert_locked(mm); vma = find_vma_and_prepare_anon(mm, dst_start); if (IS_ERR(vma)) return PTR_ERR(vma); *dst_vmap = vma; /* Skip finding src_vma if src_start is in dst_vma */ if (src_start >= vma->vm_start && src_start < vma->vm_end) goto out_success; vma = vma_lookup(mm, src_start); if (!vma) return -ENOENT; out_success: *src_vmap = vma; return 0; } #ifdef CONFIG_PER_VMA_LOCK static int uffd_move_lock(struct mm_struct *mm, unsigned long dst_start, unsigned long src_start, struct vm_area_struct **dst_vmap, struct vm_area_struct **src_vmap) { struct vm_area_struct *vma; int err; vma = uffd_lock_vma(mm, dst_start); if (IS_ERR(vma)) return PTR_ERR(vma); *dst_vmap = vma; /* * Skip finding src_vma if src_start is in dst_vma. This also ensures * that we don't lock the same vma twice. */ if (src_start >= vma->vm_start && src_start < vma->vm_end) { *src_vmap = vma; return 0; } /* * Using uffd_lock_vma() to get src_vma can lead to following deadlock: * * Thread1 Thread2 * ------- ------- * vma_start_read(dst_vma) * mmap_write_lock(mm) * vma_start_write(src_vma) * vma_start_read(src_vma) * mmap_read_lock(mm) * vma_start_write(dst_vma) */ *src_vmap = lock_vma_under_rcu(mm, src_start); if (likely(*src_vmap)) return 0; /* Undo any locking and retry in mmap_lock critical section */ vma_end_read(*dst_vmap); mmap_read_lock(mm); err = find_vmas_mm_locked(mm, dst_start, src_start, dst_vmap, src_vmap); if (err) goto out; if (!vma_start_read_locked(*dst_vmap)) { err = -EAGAIN; goto out; } /* Nothing further to do if both vmas are locked. */ if (*dst_vmap == *src_vmap) goto out; if (!vma_start_read_locked_nested(*src_vmap, SINGLE_DEPTH_NESTING)) { /* Undo dst_vmap locking if src_vmap failed to lock */ vma_end_read(*dst_vmap); err = -EAGAIN; } out: mmap_read_unlock(mm); return err; } static void uffd_move_unlock(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma) { vma_end_read(src_vma); if (src_vma != dst_vma) vma_end_read(dst_vma); } #else static int uffd_move_lock(struct mm_struct *mm, unsigned long dst_start, unsigned long src_start, struct vm_area_struct **dst_vmap, struct vm_area_struct **src_vmap) { int err; mmap_read_lock(mm); err = find_vmas_mm_locked(mm, dst_start, src_start, dst_vmap, src_vmap); if (err) mmap_read_unlock(mm); return err; } static void uffd_move_unlock(struct vm_area_struct *dst_vma, struct vm_area_struct *src_vma) { mmap_assert_locked(src_vma->vm_mm); mmap_read_unlock(dst_vma->vm_mm); } #endif /** * move_pages - move arbitrary anonymous pages of an existing vma * @ctx: pointer to the userfaultfd context * @dst_start: start of the destination virtual memory range * @src_start: start of the source virtual memory range * @len: length of the virtual memory range * @mode: flags from uffdio_move.mode * * It will either use the mmap_lock in read mode or per-vma locks * * move_pages() remaps arbitrary anonymous pages atomically in zero * copy. It only works on non shared anonymous pages because those can * be relocated without generating non linear anon_vmas in the rmap * code. * * It provides a zero copy mechanism to handle userspace page faults. * The source vma pages should have mapcount == 1, which can be * enforced by using madvise(MADV_DONTFORK) on src vma. * * The thread receiving the page during the userland page fault * will receive the faulting page in the source vma through the network, * storage or any other I/O device (MADV_DONTFORK in the source vma * avoids move_pages() to fail with -EBUSY if the process forks before * move_pages() is called), then it will call move_pages() to map the * page in the faulting address in the destination vma. * * This userfaultfd command works purely via pagetables, so it's the * most efficient way to move physical non shared anonymous pages * across different virtual addresses. Unlike mremap()/mmap()/munmap() * it does not create any new vmas. The mapping in the destination * address is atomic. * * It only works if the vma protection bits are identical from the * source and destination vma. * * It can remap non shared anonymous pages within the same vma too. * * If the source virtual memory range has any unmapped holes, or if * the destination virtual memory range is not a whole unmapped hole, * move_pages() will fail respectively with -ENOENT or -EEXIST. This * provides a very strict behavior to avoid any chance of memory * corruption going unnoticed if there are userland race conditions. * Only one thread should resolve the userland page fault at any given * time for any given faulting address. This means that if two threads * try to both call move_pages() on the same destination address at the * same time, the second thread will get an explicit error from this * command. * * The command retval will return "len" is successful. The command * however can be interrupted by fatal signals or errors. If * interrupted it will return the number of bytes successfully * remapped before the interruption if any, or the negative error if * none. It will never return zero. Either it will return an error or * an amount of bytes successfully moved. If the retval reports a * "short" remap, the move_pages() command should be repeated by * userland with src+retval, dst+reval, len-retval if it wants to know * about the error that interrupted it. * * The UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES flag can be specified to * prevent -ENOENT errors to materialize if there are holes in the * source virtual range that is being remapped. The holes will be * accounted as successfully remapped in the retval of the * command. This is mostly useful to remap hugepage naturally aligned * virtual regions without knowing if there are transparent hugepage * in the regions or not, but preventing the risk of having to split * the hugepmd during the remap. * * If there's any rmap walk that is taking the anon_vma locks without * first obtaining the folio lock (the only current instance is * folio_referenced), they will have to verify if the folio->mapping * has changed after taking the anon_vma lock. If it changed they * should release the lock and retry obtaining a new anon_vma, because * it means the anon_vma was changed by move_pages() before the lock * could be obtained. This is the only additional complexity added to * the rmap code to provide this anonymous page remapping functionality. */ ssize_t move_pages(struct userfaultfd_ctx *ctx, unsigned long dst_start, unsigned long src_start, unsigned long len, __u64 mode) { struct mm_struct *mm = ctx->mm; struct vm_area_struct *src_vma, *dst_vma; unsigned long src_addr, dst_addr, src_end; pmd_t *src_pmd, *dst_pmd; long err = -EINVAL; ssize_t moved = 0; /* Sanitize the command parameters. */ VM_WARN_ON_ONCE(src_start & ~PAGE_MASK); VM_WARN_ON_ONCE(dst_start & ~PAGE_MASK); VM_WARN_ON_ONCE(len & ~PAGE_MASK); /* Does the address range wrap, or is the span zero-sized? */ VM_WARN_ON_ONCE(src_start + len < src_start); VM_WARN_ON_ONCE(dst_start + len < dst_start); err = uffd_move_lock(mm, dst_start, src_start, &dst_vma, &src_vma); if (err) goto out; /* Re-check after taking map_changing_lock */ err = -EAGAIN; down_read(&ctx->map_changing_lock); if (likely(atomic_read(&ctx->mmap_changing))) goto out_unlock; /* * Make sure the vma is not shared, that the src and dst remap * ranges are both valid and fully within a single existing * vma. */ err = -EINVAL; if (src_vma->vm_flags & VM_SHARED) goto out_unlock; if (src_start + len > src_vma->vm_end) goto out_unlock; if (dst_vma->vm_flags & VM_SHARED) goto out_unlock; if (dst_start + len > dst_vma->vm_end) goto out_unlock; err = validate_move_areas(ctx, src_vma, dst_vma); if (err) goto out_unlock; for (src_addr = src_start, dst_addr = dst_start, src_end = src_start + len; src_addr < src_end;) { spinlock_t *ptl; pmd_t dst_pmdval; unsigned long step_size; /* * Below works because anonymous area would not have a * transparent huge PUD. If file-backed support is added, * that case would need to be handled here. */ src_pmd = mm_find_pmd(mm, src_addr); if (unlikely(!src_pmd)) { if (!(mode & UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES)) { err = -ENOENT; break; } src_pmd = mm_alloc_pmd(mm, src_addr); if (unlikely(!src_pmd)) { err = -ENOMEM; break; } } dst_pmd = mm_alloc_pmd(mm, dst_addr); if (unlikely(!dst_pmd)) { err = -ENOMEM; break; } dst_pmdval = pmdp_get_lockless(dst_pmd); /* * If the dst_pmd is mapped as THP don't override it and just * be strict. If dst_pmd changes into TPH after this check, the * move_pages_huge_pmd() will detect the change and retry * while move_pages_pte() will detect the change and fail. */ if (unlikely(pmd_trans_huge(dst_pmdval))) { err = -EEXIST; break; } ptl = pmd_trans_huge_lock(src_pmd, src_vma); if (ptl) { /* Check if we can move the pmd without splitting it. */ if (move_splits_huge_pmd(dst_addr, src_addr, src_start + len) || !pmd_none(dst_pmdval)) { /* Can be a migration entry */ if (pmd_present(*src_pmd)) { struct folio *folio = pmd_folio(*src_pmd); if (!is_huge_zero_folio(folio) && !PageAnonExclusive(&folio->page)) { spin_unlock(ptl); err = -EBUSY; break; } } spin_unlock(ptl); split_huge_pmd(src_vma, src_pmd, src_addr); /* The folio will be split by move_pages_pte() */ continue; } err = move_pages_huge_pmd(mm, dst_pmd, src_pmd, dst_pmdval, dst_vma, src_vma, dst_addr, src_addr); step_size = HPAGE_PMD_SIZE; } else { long ret; if (pmd_none(*src_pmd)) { if (!(mode & UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES)) { err = -ENOENT; break; } if (unlikely(__pte_alloc(mm, src_pmd))) { err = -ENOMEM; break; } } if (unlikely(pte_alloc(mm, dst_pmd))) { err = -ENOMEM; break; } ret = move_pages_ptes(mm, dst_pmd, src_pmd, dst_vma, src_vma, dst_addr, src_addr, src_end - src_addr, mode); if (ret < 0) err = ret; else step_size = ret; } cond_resched(); if (fatal_signal_pending(current)) { /* Do not override an error */ if (!err || err == -EAGAIN) err = -EINTR; break; } if (err) { if (err == -EAGAIN) continue; break; } /* Proceed to the next page */ dst_addr += step_size; src_addr += step_size; moved += step_size; } out_unlock: up_read(&ctx->map_changing_lock); uffd_move_unlock(dst_vma, src_vma); out: VM_WARN_ON_ONCE(moved < 0); VM_WARN_ON_ONCE(err > 0); VM_WARN_ON_ONCE(!moved && !err); return moved ? moved : err; } static void userfaultfd_set_vm_flags(struct vm_area_struct *vma, vm_flags_t vm_flags) { const bool uffd_wp_changed = (vma->vm_flags ^ vm_flags) & VM_UFFD_WP; vm_flags_reset(vma, vm_flags); /* * For shared mappings, we want to enable writenotify while * userfaultfd-wp is enabled (see vma_wants_writenotify()). We'll simply * recalculate vma->vm_page_prot whenever userfaultfd-wp changes. */ if ((vma->vm_flags & VM_SHARED) && uffd_wp_changed) vma_set_page_prot(vma); } static void userfaultfd_set_ctx(struct vm_area_struct *vma, struct userfaultfd_ctx *ctx, vm_flags_t vm_flags) { vma_start_write(vma); vma->vm_userfaultfd_ctx = (struct vm_userfaultfd_ctx){ctx}; userfaultfd_set_vm_flags(vma, (vma->vm_flags & ~__VM_UFFD_FLAGS) | vm_flags); } void userfaultfd_reset_ctx(struct vm_area_struct *vma) { userfaultfd_set_ctx(vma, NULL, 0); } struct vm_area_struct *userfaultfd_clear_vma(struct vma_iterator *vmi, struct vm_area_struct *prev, struct vm_area_struct *vma, unsigned long start, unsigned long end) { struct vm_area_struct *ret; bool give_up_on_oom = false; /* * If we are modifying only and not splitting, just give up on the merge * if OOM prevents us from merging successfully. */ if (start == vma->vm_start && end == vma->vm_end) give_up_on_oom = true; /* Reset ptes for the whole vma range if wr-protected */ if (userfaultfd_wp(vma)) uffd_wp_range(vma, start, end - start, false); ret = vma_modify_flags_uffd(vmi, prev, vma, start, end, vma->vm_flags & ~__VM_UFFD_FLAGS, NULL_VM_UFFD_CTX, give_up_on_oom); /* * In the vma_merge() successful mprotect-like case 8: * the next vma was merged into the current one and * the current one has not been updated yet. */ if (!IS_ERR(ret)) userfaultfd_reset_ctx(ret); return ret; } /* Assumes mmap write lock taken, and mm_struct pinned. */ int userfaultfd_register_range(struct userfaultfd_ctx *ctx, struct vm_area_struct *vma, vm_flags_t vm_flags, unsigned long start, unsigned long end, bool wp_async) { VMA_ITERATOR(vmi, ctx->mm, start); struct vm_area_struct *prev = vma_prev(&vmi); unsigned long vma_end; vm_flags_t new_flags; if (vma->vm_start < start) prev = vma; for_each_vma_range(vmi, vma, end) { cond_resched(); VM_WARN_ON_ONCE(!vma_can_userfault(vma, vm_flags, wp_async)); VM_WARN_ON_ONCE(vma->vm_userfaultfd_ctx.ctx && vma->vm_userfaultfd_ctx.ctx != ctx); VM_WARN_ON_ONCE(!(vma->vm_flags & VM_MAYWRITE)); /* * Nothing to do: this vma is already registered into this * userfaultfd and with the right tracking mode too. */ if (vma->vm_userfaultfd_ctx.ctx == ctx && (vma->vm_flags & vm_flags) == vm_flags) goto skip; if (vma->vm_start > start) start = vma->vm_start; vma_end = min(end, vma->vm_end); new_flags = (vma->vm_flags & ~__VM_UFFD_FLAGS) | vm_flags; vma = vma_modify_flags_uffd(&vmi, prev, vma, start, vma_end, new_flags, (struct vm_userfaultfd_ctx){ctx}, /* give_up_on_oom = */false); if (IS_ERR(vma)) return PTR_ERR(vma); /* * In the vma_merge() successful mprotect-like case 8: * the next vma was merged into the current one and * the current one has not been updated yet. */ userfaultfd_set_ctx(vma, ctx, vm_flags); if (is_vm_hugetlb_page(vma) && uffd_disable_huge_pmd_share(vma)) hugetlb_unshare_all_pmds(vma); skip: prev = vma; start = vma->vm_end; } return 0; } void userfaultfd_release_new(struct userfaultfd_ctx *ctx) { struct mm_struct *mm = ctx->mm; struct vm_area_struct *vma; VMA_ITERATOR(vmi, mm, 0); /* the various vma->vm_userfaultfd_ctx still points to it */ mmap_write_lock(mm); for_each_vma(vmi, vma) { if (vma->vm_userfaultfd_ctx.ctx == ctx) userfaultfd_reset_ctx(vma); } mmap_write_unlock(mm); } void userfaultfd_release_all(struct mm_struct *mm, struct userfaultfd_ctx *ctx) { struct vm_area_struct *vma, *prev; VMA_ITERATOR(vmi, mm, 0); if (!mmget_not_zero(mm)) return; /* * Flush page faults out of all CPUs. NOTE: all page faults * must be retried without returning VM_FAULT_SIGBUS if * userfaultfd_ctx_get() succeeds but vma->vma_userfault_ctx * changes while handle_userfault released the mmap_lock. So * it's critical that released is set to true (above), before * taking the mmap_lock for writing. */ mmap_write_lock(mm); prev = NULL; for_each_vma(vmi, vma) { cond_resched(); VM_WARN_ON_ONCE(!!vma->vm_userfaultfd_ctx.ctx ^ !!(vma->vm_flags & __VM_UFFD_FLAGS)); if (vma->vm_userfaultfd_ctx.ctx != ctx) { prev = vma; continue; } vma = userfaultfd_clear_vma(&vmi, prev, vma, vma->vm_start, vma->vm_end); prev = vma; } mmap_write_unlock(mm); mmput(mm); } |
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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 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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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * Topro TP6800/6810 webcam driver. * * Copyright (C) 2011 Jean-François Moine (http://moinejf.free.fr) * Copyright (C) 2009 Anders Blomdell (anders.blomdell@control.lth.se) * Copyright (C) 2008 Thomas Champagne (lafeuil@gmail.com) */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include "gspca.h" MODULE_DESCRIPTION("Topro TP6800/6810 gspca webcam driver"); MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>, Anders Blomdell <anders.blomdell@control.lth.se>"); MODULE_LICENSE("GPL"); static int force_sensor = -1; /* JPEG header */ static const u8 jpeg_head[] = { 0xff, 0xd8, /* jpeg */ /* quantization table quality 50% */ 0xff, 0xdb, 0x00, 0x84, /* DQT */ 0, #define JPEG_QT0_OFFSET 7 0x10, 0x0b, 0x0c, 0x0e, 0x0c, 0x0a, 0x10, 0x0e, 0x0d, 0x0e, 0x12, 0x11, 0x10, 0x13, 0x18, 0x28, 0x1a, 0x18, 0x16, 0x16, 0x18, 0x31, 0x23, 0x25, 0x1d, 0x28, 0x3a, 0x33, 0x3d, 0x3c, 0x39, 0x33, 0x38, 0x37, 0x40, 0x48, 0x5c, 0x4e, 0x40, 0x44, 0x57, 0x45, 0x37, 0x38, 0x50, 0x6d, 0x51, 0x57, 0x5f, 0x62, 0x67, 0x68, 0x67, 0x3e, 0x4d, 0x71, 0x79, 0x70, 0x64, 0x78, 0x5c, 0x65, 0x67, 0x63, 1, #define JPEG_QT1_OFFSET 72 0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2f, 0x1a, 0x1a, 0x2f, 0x63, 0x42, 0x38, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, /* Define Huffman table (thanks to Thomas Kaiser) */ 0xff, 0xc4, 0x01, 0x5e, 0x00, 0x00, 0x02, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x10, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x06, 0x01, 0x00, 0x00, 0x57, 0x01, 0x02, 0x03, 0x00, 0x11, 0x04, 0x12, 0x21, 0x31, 0x13, 0x41, 0x51, 0x61, 0x05, 0x22, 0x32, 0x14, 0x71, 0x81, 0x91, 0x15, 0x23, 0x42, 0x52, 0x62, 0xa1, 0xb1, 0x06, 0x33, 0x72, 0xc1, 0xd1, 0x24, 0x43, 0x53, 0x82, 0x16, 0x34, 0x92, 0xa2, 0xe1, 0xf1, 0xf0, 0x07, 0x08, 0x17, 0x18, 0x25, 0x26, 0x27, 0x28, 0x35, 0x36, 0x37, 0x38, 0x44, 0x45, 0x46, 0x47, 0x48, 0x54, 0x55, 0x56, 0x57, 0x58, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x06, 0x01, 0x00, 0x00, 0x57, 0x00, 0x01, 0x11, 0x02, 0x21, 0x03, 0x12, 0x31, 0x41, 0x13, 0x22, 0x51, 0x61, 0x04, 0x32, 0x71, 0x05, 0x14, 0x23, 0x42, 0x33, 0x52, 0x81, 0x91, 0xa1, 0xb1, 0xf0, 0x06, 0x15, 0xc1, 0xd1, 0xe1, 0x24, 0x43, 0x62, 0xf1, 0x16, 0x25, 0x34, 0x53, 0x72, 0x82, 0x92, 0x07, 0x08, 0x17, 0x18, 0x26, 0x27, 0x28, 0x35, 0x36, 0x37, 0x38, 0x44, 0x45, 0x46, 0x47, 0x48, 0x54, 0x55, 0x56, 0x57, 0x58, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xff, 0xc0, 0x00, 0x11, /* SOF0 (start of frame 0 */ 0x08, /* data precision */ #define JPEG_HEIGHT_OFFSET 493 0x01, 0xe0, /* height */ 0x02, 0x80, /* width */ 0x03, /* component number */ 0x01, 0x21, /* samples Y = jpeg 422 */ 0x00, /* quant Y */ 0x02, 0x11, 0x01, /* samples CbCr - quant CbCr */ 0x03, 0x11, 0x01, 0xff, 0xda, 0x00, 0x0c, /* SOS (start of scan) */ 0x03, 0x01, 0x00, 0x02, 0x11, 0x03, 0x11, 0x00, 0x3f, 0x00 #define JPEG_HDR_SZ 521 }; struct sd { struct gspca_dev gspca_dev; /* !! must be the first item */ struct v4l2_ctrl *jpegqual; struct v4l2_ctrl *sharpness; struct v4l2_ctrl *gamma; struct v4l2_ctrl *blue; struct v4l2_ctrl *red; u8 framerate; u8 quality; /* webcam current JPEG quality (0..16) */ s8 ag_cnt; /* autogain / start counter for tp6810 */ #define AG_CNT_START 13 /* check gain every N frames */ u8 bridge; u8 sensor; u8 jpeg_hdr[JPEG_HDR_SZ]; }; enum bridges { BRIDGE_TP6800, BRIDGE_TP6810, }; enum sensors { SENSOR_CX0342, SENSOR_SOI763A, /* ~= ov7630 / ov7648 */ NSENSORS }; static const struct v4l2_pix_format vga_mode[] = { {320, 240, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, .bytesperline = 320, .sizeimage = 320 * 240 * 4 / 8 + 590, .colorspace = V4L2_COLORSPACE_JPEG}, {640, 480, V4L2_PIX_FMT_JPEG, V4L2_FIELD_NONE, .bytesperline = 640, .sizeimage = 640 * 480 * 3 / 8 + 590, .colorspace = V4L2_COLORSPACE_JPEG} }; /* * JPEG quality * index: webcam compression * value: JPEG quality in % */ static const u8 jpeg_q[17] = { 88, 77, 67, 57, 55, 55, 45, 45, 36, 36, 30, 30, 26, 26, 22, 22, 94 }; #define BULK_OUT_SIZE 0x20 #if BULK_OUT_SIZE > USB_BUF_SZ #error "USB buffer too small" #endif #define DEFAULT_FRAME_RATE 30 static const u8 rates[] = {30, 20, 15, 10, 7, 5}; static const struct framerates framerates[] = { { .rates = rates, .nrates = ARRAY_SIZE(rates) }, { .rates = rates, .nrates = ARRAY_SIZE(rates) } }; static const u8 rates_6810[] = {30, 15, 10, 7, 5}; static const struct framerates framerates_6810[] = { { .rates = rates_6810, .nrates = ARRAY_SIZE(rates_6810) }, { .rates = rates_6810, .nrates = ARRAY_SIZE(rates_6810) } }; /* * webcam quality in % * the last value is the ultra fine quality */ /* TP6800 register offsets */ #define TP6800_R10_SIF_TYPE 0x10 #define TP6800_R11_SIF_CONTROL 0x11 #define TP6800_R12_SIF_ADDR_S 0x12 #define TP6800_R13_SIF_TX_DATA 0x13 #define TP6800_R14_SIF_RX_DATA 0x14 #define TP6800_R15_GPIO_PU 0x15 #define TP6800_R16_GPIO_PD 0x16 #define TP6800_R17_GPIO_IO 0x17 #define TP6800_R18_GPIO_DATA 0x18 #define TP6800_R19_SIF_ADDR_S2 0x19 #define TP6800_R1A_SIF_TX_DATA2 0x1a #define TP6800_R1B_SIF_RX_DATA2 0x1b #define TP6800_R21_ENDP_1_CTL 0x21 #define TP6800_R2F_TIMING_CFG 0x2f #define TP6800_R30_SENSOR_CFG 0x30 #define TP6800_R31_PIXEL_START 0x31 #define TP6800_R32_PIXEL_END_L 0x32 #define TP6800_R33_PIXEL_END_H 0x33 #define TP6800_R34_LINE_START 0x34 #define TP6800_R35_LINE_END_L 0x35 #define TP6800_R36_LINE_END_H 0x36 #define TP6800_R37_FRONT_DARK_ST 0x37 #define TP6800_R38_FRONT_DARK_END 0x38 #define TP6800_R39_REAR_DARK_ST_L 0x39 #define TP6800_R3A_REAR_DARK_ST_H 0x3a #define TP6800_R3B_REAR_DARK_END_L 0x3b #define TP6800_R3C_REAR_DARK_END_H 0x3c #define TP6800_R3D_HORIZ_DARK_LINE_L 0x3d #define TP6800_R3E_HORIZ_DARK_LINE_H 0x3e #define TP6800_R3F_FRAME_RATE 0x3f #define TP6800_R50 0x50 #define TP6800_R51 0x51 #define TP6800_R52 0x52 #define TP6800_R53 0x53 #define TP6800_R54_DARK_CFG 0x54 #define TP6800_R55_GAMMA_R 0x55 #define TP6800_R56_GAMMA_G 0x56 #define TP6800_R57_GAMMA_B 0x57 #define TP6800_R5C_EDGE_THRLD 0x5c #define TP6800_R5D_DEMOSAIC_CFG 0x5d #define TP6800_R78_FORMAT 0x78 #define TP6800_R79_QUALITY 0x79 #define TP6800_R7A_BLK_THRLD 0x7a /* CX0342 register offsets */ #define CX0342_SENSOR_ID 0x00 #define CX0342_VERSION_NO 0x01 #define CX0342_ORG_X_L 0x02 #define CX0342_ORG_X_H 0x03 #define CX0342_ORG_Y_L 0x04 #define CX0342_ORG_Y_H 0x05 #define CX0342_STOP_X_L 0x06 #define CX0342_STOP_X_H 0x07 #define CX0342_STOP_Y_L 0x08 #define CX0342_STOP_Y_H 0x09 #define CX0342_FRAME_WIDTH_L 0x0a #define CX0342_FRAME_WIDTH_H 0x0b #define CX0342_FRAME_HEIGH_L 0x0c #define CX0342_FRAME_HEIGH_H 0x0d #define CX0342_EXPO_LINE_L 0x10 #define CX0342_EXPO_LINE_H 0x11 #define CX0342_EXPO_CLK_L 0x12 #define CX0342_EXPO_CLK_H 0x13 #define CX0342_RAW_GRGAIN_L 0x14 #define CX0342_RAW_GRGAIN_H 0x15 #define CX0342_RAW_GBGAIN_L 0x16 #define CX0342_RAW_GBGAIN_H 0x17 #define CX0342_RAW_RGAIN_L 0x18 #define CX0342_RAW_RGAIN_H 0x19 #define CX0342_RAW_BGAIN_L 0x1a #define CX0342_RAW_BGAIN_H 0x1b #define CX0342_GLOBAL_GAIN 0x1c #define CX0342_SYS_CTRL_0 0x20 #define CX0342_SYS_CTRL_1 0x21 #define CX0342_SYS_CTRL_2 0x22 #define CX0342_BYPASS_MODE 0x23 #define CX0342_SYS_CTRL_3 0x24 #define CX0342_TIMING_EN 0x25 #define CX0342_OUTPUT_CTRL 0x26 #define CX0342_AUTO_ADC_CALIB 0x27 #define CX0342_SYS_CTRL_4 0x28 #define CX0342_ADCGN 0x30 #define CX0342_SLPCR 0x31 #define CX0342_SLPFN_LO 0x32 #define CX0342_ADC_CTL 0x33 #define CX0342_LVRST_BLBIAS 0x34 #define CX0342_VTHSEL 0x35 #define CX0342_RAMP_RIV 0x36 #define CX0342_LDOSEL 0x37 #define CX0342_CLOCK_GEN 0x40 #define CX0342_SOFT_RESET 0x41 #define CX0342_PLL 0x42 #define CX0342_DR_ENH_PULSE_OFFSET_L 0x43 #define CX0342_DR_ENH_PULSE_OFFSET_H 0x44 #define CX0342_DR_ENH_PULSE_POS_L 0x45 #define CX0342_DR_ENH_PULSE_POS_H 0x46 #define CX0342_DR_ENH_PULSE_WIDTH 0x47 #define CX0342_AS_CURRENT_CNT_L 0x48 #define CX0342_AS_CURRENT_CNT_H 0x49 #define CX0342_AS_PREVIOUS_CNT_L 0x4a #define CX0342_AS_PREVIOUS_CNT_H 0x4b #define CX0342_SPV_VALUE_L 0x4c #define CX0342_SPV_VALUE_H 0x4d #define CX0342_GPXLTHD_L 0x50 #define CX0342_GPXLTHD_H 0x51 #define CX0342_RBPXLTHD_L 0x52 #define CX0342_RBPXLTHD_H 0x53 #define CX0342_PLANETHD_L 0x54 #define CX0342_PLANETHD_H 0x55 #define CX0342_ROWDARK_TH 0x56 #define CX0342_ROWDARK_TOL 0x57 #define CX0342_RB_GAP_L 0x58 #define CX0342_RB_GAP_H 0x59 #define CX0342_G_GAP_L 0x5a #define CX0342_G_GAP_H 0x5b #define CX0342_AUTO_ROW_DARK 0x60 #define CX0342_MANUAL_DARK_VALUE 0x61 #define CX0342_GB_DARK_OFFSET 0x62 #define CX0342_GR_DARK_OFFSET 0x63 #define CX0342_RED_DARK_OFFSET 0x64 #define CX0342_BLUE_DARK_OFFSET 0x65 #define CX0342_DATA_SCALING_MULTI 0x66 #define CX0342_AUTOD_Q_FRAME 0x67 #define CX0342_AUTOD_ALLOW_VARI 0x68 #define CX0342_AUTO_DARK_VALUE_L 0x69 #define CX0342_AUTO_DARK_VALUE_H 0x6a #define CX0342_IO_CTRL_0 0x70 #define CX0342_IO_CTRL_1 0x71 #define CX0342_IO_CTRL_2 0x72 #define CX0342_IDLE_CTRL 0x73 #define CX0342_TEST_MODE 0x74 #define CX0342_FRAME_FIX_DATA_TEST 0x75 #define CX0342_FRAME_CNT_TEST 0x76 #define CX0342_RST_OVERFLOW_L 0x80 #define CX0342_RST_OVERFLOW_H 0x81 #define CX0342_RST_UNDERFLOW_L 0x82 #define CX0342_RST_UNDERFLOW_H 0x83 #define CX0342_DATA_OVERFLOW_L 0x84 #define CX0342_DATA_OVERFLOW_H 0x85 #define CX0342_DATA_UNDERFLOW_L 0x86 #define CX0342_DATA_UNDERFLOW_H 0x87 #define CX0342_CHANNEL_0_0_L_irst 0x90 #define CX0342_CHANNEL_0_0_H_irst 0x91 #define CX0342_CHANNEL_0_1_L_irst 0x92 #define CX0342_CHANNEL_0_1_H_irst 0x93 #define CX0342_CHANNEL_0_2_L_irst 0x94 #define CX0342_CHANNEL_0_2_H_irst 0x95 #define CX0342_CHANNEL_0_3_L_irst 0x96 #define CX0342_CHANNEL_0_3_H_irst 0x97 #define CX0342_CHANNEL_0_4_L_irst 0x98 #define CX0342_CHANNEL_0_4_H_irst 0x99 #define CX0342_CHANNEL_0_5_L_irst 0x9a #define CX0342_CHANNEL_0_5_H_irst 0x9b #define CX0342_CHANNEL_0_6_L_irst 0x9c #define CX0342_CHANNEL_0_6_H_irst 0x9d #define CX0342_CHANNEL_0_7_L_irst 0x9e #define CX0342_CHANNEL_0_7_H_irst 0x9f #define CX0342_CHANNEL_1_0_L_itx 0xa0 #define CX0342_CHANNEL_1_0_H_itx 0xa1 #define CX0342_CHANNEL_1_1_L_itx 0xa2 #define CX0342_CHANNEL_1_1_H_itx 0xa3 #define CX0342_CHANNEL_1_2_L_itx 0xa4 #define CX0342_CHANNEL_1_2_H_itx 0xa5 #define CX0342_CHANNEL_1_3_L_itx 0xa6 #define CX0342_CHANNEL_1_3_H_itx 0xa7 #define CX0342_CHANNEL_1_4_L_itx 0xa8 #define CX0342_CHANNEL_1_4_H_itx 0xa9 #define CX0342_CHANNEL_1_5_L_itx 0xaa #define CX0342_CHANNEL_1_5_H_itx 0xab #define CX0342_CHANNEL_1_6_L_itx 0xac #define CX0342_CHANNEL_1_6_H_itx 0xad #define CX0342_CHANNEL_1_7_L_itx 0xae #define CX0342_CHANNEL_1_7_H_itx 0xaf #define CX0342_CHANNEL_2_0_L_iwl 0xb0 #define CX0342_CHANNEL_2_0_H_iwl 0xb1 #define CX0342_CHANNEL_2_1_L_iwl 0xb2 #define CX0342_CHANNEL_2_1_H_iwl 0xb3 #define CX0342_CHANNEL_2_2_L_iwl 0xb4 #define CX0342_CHANNEL_2_2_H_iwl 0xb5 #define CX0342_CHANNEL_2_3_L_iwl 0xb6 #define CX0342_CHANNEL_2_3_H_iwl 0xb7 #define CX0342_CHANNEL_2_4_L_iwl 0xb8 #define CX0342_CHANNEL_2_4_H_iwl 0xb9 #define CX0342_CHANNEL_2_5_L_iwl 0xba #define CX0342_CHANNEL_2_5_H_iwl 0xbb #define CX0342_CHANNEL_2_6_L_iwl 0xbc #define CX0342_CHANNEL_2_6_H_iwl 0xbd #define CX0342_CHANNEL_2_7_L_iwl 0xbe #define CX0342_CHANNEL_2_7_H_iwl 0xbf #define CX0342_CHANNEL_3_0_L_ensp 0xc0 #define CX0342_CHANNEL_3_0_H_ensp 0xc1 #define CX0342_CHANNEL_3_1_L_ensp 0xc2 #define CX0342_CHANNEL_3_1_H_ensp 0xc3 #define CX0342_CHANNEL_3_2_L_ensp 0xc4 #define CX0342_CHANNEL_3_2_H_ensp 0xc5 #define CX0342_CHANNEL_3_3_L_ensp 0xc6 #define CX0342_CHANNEL_3_3_H_ensp 0xc7 #define CX0342_CHANNEL_3_4_L_ensp 0xc8 #define CX0342_CHANNEL_3_4_H_ensp 0xc9 #define CX0342_CHANNEL_3_5_L_ensp 0xca #define CX0342_CHANNEL_3_5_H_ensp 0xcb #define CX0342_CHANNEL_3_6_L_ensp 0xcc #define CX0342_CHANNEL_3_6_H_ensp 0xcd #define CX0342_CHANNEL_3_7_L_ensp 0xce #define CX0342_CHANNEL_3_7_H_ensp 0xcf #define CX0342_CHANNEL_4_0_L_sela 0xd0 #define CX0342_CHANNEL_4_0_H_sela 0xd1 #define CX0342_CHANNEL_4_1_L_sela 0xd2 #define CX0342_CHANNEL_4_1_H_sela 0xd3 #define CX0342_CHANNEL_5_0_L_intla 0xe0 #define CX0342_CHANNEL_5_0_H_intla 0xe1 #define CX0342_CHANNEL_5_1_L_intla 0xe2 #define CX0342_CHANNEL_5_1_H_intla 0xe3 #define CX0342_CHANNEL_5_2_L_intla 0xe4 #define CX0342_CHANNEL_5_2_H_intla 0xe5 #define CX0342_CHANNEL_5_3_L_intla 0xe6 #define CX0342_CHANNEL_5_3_H_intla 0xe7 #define CX0342_CHANNEL_6_0_L_xa_sel_pos 0xf0 #define CX0342_CHANNEL_6_0_H_xa_sel_pos 0xf1 #define CX0342_CHANNEL_7_1_L_cds_pos 0xf2 #define CX0342_CHANNEL_7_1_H_cds_pos 0xf3 #define CX0342_SENSOR_HEIGHT_L 0xfb #define CX0342_SENSOR_HEIGHT_H 0xfc #define CX0342_SENSOR_WIDTH_L 0xfd #define CX0342_SENSOR_WIDTH_H 0xfe #define CX0342_VSYNC_HSYNC_READ 0xff struct cmd { u8 reg; u8 val; }; static const u8 DQT[17][130] = { /* Define quantization table (thanks to Thomas Kaiser) */ { /* Quality 0 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x01, 0x04, 0x04, 0x04, 0x06, 0x05, 0x06, 0x0b, 0x06, 0x06, 0x0b, 0x18, 0x10, 0x0e, 0x10, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, }, { /* Quality 1 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x09, 0x01, 0x08, 0x09, 0x09, 0x0c, 0x0a, 0x0c, 0x17, 0x0d, 0x0d, 0x17, 0x31, 0x21, 0x1c, 0x21, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, 0x31, }, { /* Quality 2 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x06, 0x06, 0x06, 0x04, 0x04, 0x04, 0x04, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x01, 0x0c, 0x0d, 0x0d, 0x12, 0x0f, 0x12, 0x23, 0x13, 0x13, 0x23, 0x4a, 0x31, 0x2a, 0x31, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, 0x4a, }, { /* Quality 3 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x04, 0x04, 0x04, 0x04, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x13, 0x01, 0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2f, 0x1a, 0x1a, 0x2f, 0x63, 0x42, 0x38, 0x42, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, }, { /* Quality 4 */ 0x00, 0x04, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x0a, 0x0a, 0x0a, 0x05, 0x05, 0x05, 0x05, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x01, 0x11, 0x16, 0x16, 0x1e, 0x1a, 0x1e, 0x3a, 0x20, 0x20, 0x3a, 0x7b, 0x52, 0x46, 0x52, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, 0x7b, }, { /* Quality 5 */ 0x00, 0x04, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x0c, 0x0c, 0x0c, 0x06, 0x06, 0x06, 0x06, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x01, 0x11, 0x1b, 0x1b, 0x24, 0x1f, 0x24, 0x46, 0x27, 0x27, 0x46, 0x94, 0x63, 0x54, 0x63, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, 0x94, }, { /* Quality 6 */ 0x00, 0x05, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x0e, 0x0e, 0x0e, 0x07, 0x07, 0x07, 0x07, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x21, 0x01, 0x15, 0x1f, 0x1f, 0x2a, 0x24, 0x2a, 0x52, 0x2d, 0x2d, 0x52, 0xad, 0x73, 0x62, 0x73, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, 0xad, }, { /* Quality 7 */ 0x00, 0x05, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x10, 0x10, 0x10, 0x08, 0x08, 0x08, 0x08, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x26, 0x01, 0x15, 0x24, 0x24, 0x30, 0x2a, 0x30, 0x5e, 0x34, 0x34, 0x5e, 0xc6, 0x84, 0x70, 0x84, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, }, { /* Quality 8 */ 0x00, 0x06, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x14, 0x14, 0x14, 0x0a, 0x0a, 0x0a, 0x0a, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x2f, 0x01, 0x19, 0x2d, 0x2d, 0x3c, 0x34, 0x3c, 0x75, 0x41, 0x41, 0x75, 0xf7, 0xa5, 0x8c, 0xa5, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, 0xf7, }, { /* Quality 9 */ 0x00, 0x06, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x18, 0x18, 0x18, 0x0c, 0x0c, 0x0c, 0x0c, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x39, 0x01, 0x19, 0x36, 0x36, 0x48, 0x3f, 0x48, 0x8d, 0x4e, 0x4e, 0x8d, 0xff, 0xc6, 0xa8, 0xc6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 10 */ 0x00, 0x07, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x1c, 0x1c, 0x1c, 0x0e, 0x0e, 0x0e, 0x0e, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x01, 0x1d, 0x3f, 0x3f, 0x54, 0x49, 0x54, 0xa4, 0x5b, 0x5b, 0xa4, 0xff, 0xe7, 0xc4, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 11 */ 0x00, 0x07, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x20, 0x20, 0x20, 0x10, 0x10, 0x10, 0x10, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x4c, 0x01, 0x1d, 0x48, 0x48, 0x60, 0x54, 0x60, 0xbc, 0x68, 0x68, 0xbc, 0xff, 0xff, 0xe0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 12 */ 0x00, 0x08, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x28, 0x28, 0x28, 0x14, 0x14, 0x14, 0x14, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x28, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x01, 0x22, 0x5a, 0x5a, 0x78, 0x69, 0x78, 0xeb, 0x82, 0x82, 0xeb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 13 */ 0x00, 0x08, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x30, 0x30, 0x30, 0x18, 0x18, 0x18, 0x18, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x72, 0x01, 0x22, 0x6c, 0x6c, 0x90, 0x7e, 0x90, 0xff, 0x9c, 0x9c, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 14 */ 0x00, 0x0a, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x1c, 0x38, 0x38, 0x38, 0x1c, 0x1c, 0x1c, 0x1c, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x38, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x85, 0x01, 0x2a, 0x7e, 0x7e, 0xa8, 0x93, 0xa8, 0xff, 0xb6, 0xb6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 15 */ 0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x40, 0x40, 0x40, 0x20, 0x20, 0x20, 0x20, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x98, 0x01, 0x2a, 0x90, 0x90, 0xc0, 0xa8, 0xc0, 0xff, 0xd0, 0xd0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }, { /* Quality 16-31 */ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x01, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, } }; static const struct cmd tp6810_cx_init_common[] = { {0x1c, 0x00}, {TP6800_R10_SIF_TYPE, 0x00}, {0x4e, 0x00}, {0x4f, 0x00}, {TP6800_R50, 0xff}, {TP6800_R51, 0x03}, {0x00, 0x07}, {TP6800_R79_QUALITY, 0x03}, {TP6800_R2F_TIMING_CFG, 0x37}, {TP6800_R30_SENSOR_CFG, 0x10}, {TP6800_R21_ENDP_1_CTL, 0x00}, {TP6800_R52, 0x40}, {TP6800_R53, 0x40}, {TP6800_R54_DARK_CFG, 0x40}, {TP6800_R30_SENSOR_CFG, 0x18}, {0x4b, 0x00}, {TP6800_R3F_FRAME_RATE, 0x83}, {TP6800_R79_QUALITY, 0x05}, {TP6800_R21_ENDP_1_CTL, 0x00}, {0x7c, 0x04}, {0x25, 0x14}, {0x26, 0x0f}, {0x7b, 0x10}, }; static const struct cmd tp6810_ov_init_common[] = { {0x1c, 0x00}, {TP6800_R10_SIF_TYPE, 0x00}, {0x4e, 0x00}, {0x4f, 0x00}, {TP6800_R50, 0xff}, {TP6800_R51, 0x03}, {0x00, 0x07}, {TP6800_R52, 0x40}, {TP6800_R53, 0x40}, {TP6800_R54_DARK_CFG, 0x40}, {TP6800_R79_QUALITY, 0x03}, {TP6800_R2F_TIMING_CFG, 0x17}, {TP6800_R30_SENSOR_CFG, 0x18}, {TP6800_R21_ENDP_1_CTL, 0x00}, {TP6800_R3F_FRAME_RATE, 0x86}, {0x25, 0x18}, {0x26, 0x0f}, {0x7b, 0x90}, }; static const struct cmd tp6810_bridge_start[] = { {0x59, 0x88}, {0x5a, 0x0f}, {0x5b, 0x4e}, {TP6800_R5C_EDGE_THRLD, 0x63}, {TP6800_R5D_DEMOSAIC_CFG, 0x00}, {0x03, 0x7f}, {0x04, 0x80}, {0x06, 0x00}, {0x00, 0x00}, }; static const struct cmd tp6810_late_start[] = { {0x7d, 0x01}, {0xb0, 0x04}, {0xb1, 0x04}, {0xb2, 0x04}, {0xb3, 0x04}, {0xb4, 0x04}, {0xb5, 0x04}, {0xb6, 0x08}, {0xb7, 0x08}, {0xb8, 0x04}, {0xb9, 0x04}, {0xba, 0x04}, {0xbb, 0x04}, {0xbc, 0x04}, {0xbd, 0x08}, {0xbe, 0x08}, {0xbf, 0x08}, {0xc0, 0x04}, {0xc1, 0x04}, {0xc2, 0x08}, {0xc3, 0x08}, {0xc4, 0x08}, {0xc5, 0x08}, {0xc6, 0x08}, {0xc7, 0x13}, {0xc8, 0x04}, {0xc9, 0x08}, {0xca, 0x08}, {0xcb, 0x08}, {0xcc, 0x08}, {0xcd, 0x08}, {0xce, 0x13}, {0xcf, 0x13}, {0xd0, 0x08}, {0xd1, 0x08}, {0xd2, 0x08}, {0xd3, 0x08}, {0xd4, 0x08}, {0xd5, 0x13}, {0xd6, 0x13}, {0xd7, 0x13}, {0xd8, 0x08}, {0xd9, 0x08}, {0xda, 0x08}, {0xdb, 0x08}, {0xdc, 0x13}, {0xdd, 0x13}, {0xde, 0x13}, {0xdf, 0x13}, {0xe0, 0x08}, {0xe1, 0x08}, {0xe2, 0x08}, {0xe3, 0x13}, {0xe4, 0x13}, {0xe5, 0x13}, {0xe6, 0x13}, {0xe7, 0x13}, {0xe8, 0x08}, {0xe9, 0x08}, {0xea, 0x13}, {0xeb, 0x13}, {0xec, 0x13}, {0xed, 0x13}, {0xee, 0x13}, {0xef, 0x13}, {0x7d, 0x02}, /* later after isoc start */ {0x7d, 0x08}, {0x7d, 0x00}, }; static const struct cmd cx0342_timing_seq[] = { {CX0342_CHANNEL_0_1_L_irst, 0x20}, {CX0342_CHANNEL_0_2_L_irst, 0x24}, {CX0342_CHANNEL_0_2_H_irst, 0x00}, {CX0342_CHANNEL_0_3_L_irst, 0x2f}, {CX0342_CHANNEL_0_3_H_irst, 0x00}, {CX0342_CHANNEL_1_0_L_itx, 0x02}, {CX0342_CHANNEL_1_0_H_itx, 0x00}, {CX0342_CHANNEL_1_1_L_itx, 0x20}, {CX0342_CHANNEL_1_1_H_itx, 0x00}, {CX0342_CHANNEL_1_2_L_itx, 0xe4}, {CX0342_CHANNEL_1_2_H_itx, 0x00}, {CX0342_CHANNEL_1_3_L_itx, 0xee}, {CX0342_CHANNEL_1_3_H_itx, 0x00}, {CX0342_CHANNEL_2_0_L_iwl, 0x30}, {CX0342_CHANNEL_2_0_H_iwl, 0x00}, {CX0342_CHANNEL_3_0_L_ensp, 0x34}, {CX0342_CHANNEL_3_1_L_ensp, 0xe2}, {CX0342_CHANNEL_3_1_H_ensp, 0x00}, {CX0342_CHANNEL_3_2_L_ensp, 0xf6}, {CX0342_CHANNEL_3_2_H_ensp, 0x00}, {CX0342_CHANNEL_3_3_L_ensp, 0xf4}, {CX0342_CHANNEL_3_3_H_ensp, 0x02}, {CX0342_CHANNEL_4_0_L_sela, 0x26}, {CX0342_CHANNEL_4_0_H_sela, 0x00}, {CX0342_CHANNEL_4_1_L_sela, 0xe2}, {CX0342_CHANNEL_4_1_H_sela, 0x00}, {CX0342_CHANNEL_5_0_L_intla, 0x26}, {CX0342_CHANNEL_5_1_L_intla, 0x29}, {CX0342_CHANNEL_5_2_L_intla, 0xf0}, {CX0342_CHANNEL_5_2_H_intla, 0x00}, {CX0342_CHANNEL_5_3_L_intla, 0xf3}, {CX0342_CHANNEL_5_3_H_intla, 0x00}, {CX0342_CHANNEL_6_0_L_xa_sel_pos, 0x24}, {CX0342_CHANNEL_7_1_L_cds_pos, 0x02}, {CX0342_TIMING_EN, 0x01}, }; /* define the JPEG header */ static void jpeg_define(u8 *jpeg_hdr, int height, int width) { memcpy(jpeg_hdr, jpeg_head, sizeof jpeg_head); jpeg_hdr[JPEG_HEIGHT_OFFSET + 0] = height >> 8; jpeg_hdr[JPEG_HEIGHT_OFFSET + 1] = height; jpeg_hdr[JPEG_HEIGHT_OFFSET + 2] = width >> 8; jpeg_hdr[JPEG_HEIGHT_OFFSET + 3] = width; } /* set the JPEG quality for sensor soi763a */ static void jpeg_set_qual(u8 *jpeg_hdr, int quality) { int i, sc; if (quality <= 0) sc = 5000; else if (quality < 50) sc = 5000 / quality; else sc = 200 - quality * 2; for (i = 0; i < 64; i++) { jpeg_hdr[JPEG_QT0_OFFSET + i] = (jpeg_head[JPEG_QT0_OFFSET + i] * sc + 50) / 100; jpeg_hdr[JPEG_QT1_OFFSET + i] = (jpeg_head[JPEG_QT1_OFFSET + i] * sc + 50) / 100; } } static void reg_w(struct gspca_dev *gspca_dev, u8 index, u8 value) { struct usb_device *dev = gspca_dev->dev; int ret; if (gspca_dev->usb_err < 0) return; ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 0x0e, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value, index, NULL, 0, 500); if (ret < 0) { pr_err("reg_w err %d\n", ret); gspca_dev->usb_err = ret; } } /* the returned value is in gspca_dev->usb_buf */ static void reg_r(struct gspca_dev *gspca_dev, u8 index) { struct usb_device *dev = gspca_dev->dev; int ret; if (gspca_dev->usb_err < 0) return; ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), 0x0d, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 0, index, gspca_dev->usb_buf, 1, 500); if (ret < 0) { pr_err("reg_r err %d\n", ret); gspca_dev->usb_err = ret; } } static void reg_w_buf(struct gspca_dev *gspca_dev, const struct cmd *p, int l) { do { reg_w(gspca_dev, p->reg, p->val); p++; } while (--l > 0); } static int i2c_w(struct gspca_dev *gspca_dev, u8 index, u8 value) { struct sd *sd = (struct sd *) gspca_dev; reg_w(gspca_dev, TP6800_R11_SIF_CONTROL, 0x00); reg_w(gspca_dev, TP6800_R19_SIF_ADDR_S2, index); reg_w(gspca_dev, TP6800_R13_SIF_TX_DATA, value); reg_w(gspca_dev, TP6800_R11_SIF_CONTROL, 0x01); if (sd->bridge == BRIDGE_TP6800) return 0; msleep(5); reg_r(gspca_dev, TP6800_R11_SIF_CONTROL); if (gspca_dev->usb_buf[0] == 0) return 0; reg_w(gspca_dev, TP6800_R11_SIF_CONTROL, 0x00); return -1; /* error */ } static void i2c_w_buf(struct gspca_dev *gspca_dev, const struct cmd *p, int l) { do { i2c_w(gspca_dev, p->reg, p->val); p++; } while (--l > 0); } static int i2c_r(struct gspca_dev *gspca_dev, u8 index, int len) { struct sd *sd = (struct sd *) gspca_dev; int v; reg_w(gspca_dev, TP6800_R19_SIF_ADDR_S2, index); reg_w(gspca_dev, TP6800_R11_SIF_CONTROL, 0x02); msleep(5); reg_r(gspca_dev, TP6800_R14_SIF_RX_DATA); v = gspca_dev->usb_buf[0]; if (sd->bridge == BRIDGE_TP6800) return v; if (len > 1) { reg_r(gspca_dev, TP6800_R1B_SIF_RX_DATA2); v |= (gspca_dev->usb_buf[0] << 8); } reg_r(gspca_dev, TP6800_R11_SIF_CONTROL); if (gspca_dev->usb_buf[0] == 0) return v; reg_w(gspca_dev, TP6800_R11_SIF_CONTROL, 0x00); return -1; } static void bulk_w(struct gspca_dev *gspca_dev, u8 tag, const u8 *data, int length) { struct usb_device *dev = gspca_dev->dev; int count, actual_count, ret; if (gspca_dev->usb_err < 0) return; for (;;) { count = length > BULK_OUT_SIZE - 1 ? BULK_OUT_SIZE - 1 : length; gspca_dev->usb_buf[0] = tag; memcpy(&gspca_dev->usb_buf[1], data, count); ret = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 3), gspca_dev->usb_buf, count + 1, &actual_count, 500); if (ret < 0) { pr_err("bulk write error %d tag=%02x\n", ret, tag); gspca_dev->usb_err = ret; return; } length -= count; if (length <= 0) break; data += count; } } static int probe_6810(struct gspca_dev *gspca_dev) { u8 gpio; int ret; reg_r(gspca_dev, TP6800_R18_GPIO_DATA); gpio = gspca_dev->usb_buf[0]; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R10_SIF_TYPE, 0x04); /* i2c 16 bits */ reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x21); /* ov??? */ reg_w(gspca_dev, TP6800_R1A_SIF_TX_DATA2, 0x00); if (i2c_w(gspca_dev, 0x00, 0x00) >= 0) return SENSOR_SOI763A; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R10_SIF_TYPE, 0x00); /* i2c 8 bits */ reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x7f); /* (unknown i2c) */ if (i2c_w(gspca_dev, 0x00, 0x00) >= 0) return -2; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R10_SIF_TYPE, 0x00); /* i2c 8 bits */ reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x11); /* tas??? / hv??? */ ret = i2c_r(gspca_dev, 0x00, 1); if (ret > 0) return -3; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x6e); /* po??? */ ret = i2c_r(gspca_dev, 0x00, 1); if (ret > 0) return -4; ret = i2c_r(gspca_dev, 0x01, 1); if (ret > 0) return -5; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R10_SIF_TYPE, 0x04); /* i2c 16 bits */ reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x5d); /* mi/mt??? */ ret = i2c_r(gspca_dev, 0x00, 2); if (ret > 0) return -6; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x5c); /* mi/mt??? */ ret = i2c_r(gspca_dev, 0x36, 2); if (ret > 0) return -7; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x61); /* (unknown i2c) */ reg_w(gspca_dev, TP6800_R1A_SIF_TX_DATA2, 0x10); if (i2c_w(gspca_dev, 0xff, 0x00) >= 0) return -8; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio); reg_w(gspca_dev, TP6800_R18_GPIO_DATA, gpio | 0x20); reg_w(gspca_dev, TP6800_R10_SIF_TYPE, 0x00); /* i2c 8 bits */ reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x20); /* cx0342 */ ret = i2c_r(gspca_dev, 0x00, 1); if (ret > 0) return SENSOR_CX0342; return -9; } static void cx0342_6810_init(struct gspca_dev *gspca_dev) { static const struct cmd reg_init_1[] = { {TP6800_R2F_TIMING_CFG, 0x2f}, {0x25, 0x02}, {TP6800_R21_ENDP_1_CTL, 0x00}, {TP6800_R3F_FRAME_RATE, 0x80}, {TP6800_R2F_TIMING_CFG, 0x2f}, {TP6800_R18_GPIO_DATA, 0xe1}, {TP6800_R18_GPIO_DATA, 0xc1}, {TP6800_R18_GPIO_DATA, 0xe1}, {TP6800_R11_SIF_CONTROL, 0x00}, }; static const struct cmd reg_init_2[] = { {TP6800_R78_FORMAT, 0x48}, {TP6800_R11_SIF_CONTROL, 0x00}, }; static const struct cmd sensor_init[] = { {CX0342_OUTPUT_CTRL, 0x07}, {CX0342_BYPASS_MODE, 0x58}, {CX0342_GPXLTHD_L, 0x28}, {CX0342_RBPXLTHD_L, 0x28}, {CX0342_PLANETHD_L, 0x50}, {CX0342_PLANETHD_H, 0x03}, {CX0342_RB_GAP_L, 0xff}, {CX0342_RB_GAP_H, 0x07}, {CX0342_G_GAP_L, 0xff}, {CX0342_G_GAP_H, 0x07}, {CX0342_RST_OVERFLOW_L, 0x5c}, {CX0342_RST_OVERFLOW_H, 0x01}, {CX0342_DATA_OVERFLOW_L, 0xfc}, {CX0342_DATA_OVERFLOW_H, 0x03}, {CX0342_DATA_UNDERFLOW_L, 0x00}, {CX0342_DATA_UNDERFLOW_H, 0x00}, {CX0342_SYS_CTRL_0, 0x40}, {CX0342_GLOBAL_GAIN, 0x01}, {CX0342_CLOCK_GEN, 0x00}, {CX0342_SYS_CTRL_0, 0x02}, {CX0342_IDLE_CTRL, 0x05}, {CX0342_ADCGN, 0x00}, {CX0342_ADC_CTL, 0x00}, {CX0342_LVRST_BLBIAS, 0x01}, {CX0342_VTHSEL, 0x0b}, {CX0342_RAMP_RIV, 0x0b}, {CX0342_LDOSEL, 0x07}, {CX0342_SPV_VALUE_L, 0x40}, {CX0342_SPV_VALUE_H, 0x02}, {CX0342_AUTO_ADC_CALIB, 0x81}, {CX0342_TIMING_EN, 0x01}, }; reg_w_buf(gspca_dev, reg_init_1, ARRAY_SIZE(reg_init_1)); reg_w_buf(gspca_dev, tp6810_cx_init_common, ARRAY_SIZE(tp6810_cx_init_common)); reg_w_buf(gspca_dev, reg_init_2, ARRAY_SIZE(reg_init_2)); reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x20); /* cx0342 I2C addr */ i2c_w_buf(gspca_dev, sensor_init, ARRAY_SIZE(sensor_init)); i2c_w_buf(gspca_dev, cx0342_timing_seq, ARRAY_SIZE(cx0342_timing_seq)); } static void soi763a_6810_init(struct gspca_dev *gspca_dev) { static const struct cmd reg_init_1[] = { {TP6800_R2F_TIMING_CFG, 0x2f}, {TP6800_R18_GPIO_DATA, 0xe1}, {0x25, 0x02}, {TP6800_R21_ENDP_1_CTL, 0x00}, {TP6800_R3F_FRAME_RATE, 0x80}, {TP6800_R2F_TIMING_CFG, 0x2f}, {TP6800_R18_GPIO_DATA, 0xc1}, }; static const struct cmd reg_init_2[] = { {TP6800_R78_FORMAT, 0x54}, }; static const struct cmd sensor_init[] = { {0x00, 0x00}, {0x01, 0x80}, {0x02, 0x80}, {0x03, 0x90}, {0x04, 0x20}, {0x05, 0x20}, {0x06, 0x80}, {0x07, 0x00}, {0x08, 0xff}, {0x09, 0xff}, {0x0a, 0x76}, /* 7630 = soi673a */ {0x0b, 0x30}, {0x0c, 0x20}, {0x0d, 0x20}, {0x0e, 0xff}, {0x0f, 0xff}, {0x10, 0x41}, {0x15, 0x14}, {0x11, 0x40}, {0x12, 0x48}, {0x13, 0x80}, {0x14, 0x80}, {0x16, 0x03}, {0x28, 0xb0}, {0x71, 0x20}, {0x75, 0x8e}, {0x17, 0x1b}, {0x18, 0xbd}, {0x19, 0x05}, {0x1a, 0xf6}, {0x1b, 0x04}, {0x1c, 0x7f}, /* omnivision */ {0x1d, 0xa2}, {0x1e, 0x00}, {0x1f, 0x00}, {0x20, 0x45}, {0x21, 0x80}, {0x22, 0x80}, {0x23, 0xee}, {0x24, 0x50}, {0x25, 0x7a}, {0x26, 0xa0}, {0x27, 0x9a}, {0x29, 0x30}, {0x2a, 0x80}, {0x2b, 0x00}, {0x2c, 0xac}, {0x2d, 0x05}, {0x2e, 0x80}, {0x2f, 0x3c}, {0x30, 0x22}, {0x31, 0x00}, {0x32, 0x86}, {0x33, 0x08}, {0x34, 0xff}, {0x35, 0xff}, {0x36, 0xff}, {0x37, 0xff}, {0x38, 0xff}, {0x39, 0xff}, {0x3a, 0xfe}, {0x3b, 0xfe}, {0x3c, 0xfe}, {0x3d, 0xfe}, {0x3e, 0xfe}, {0x3f, 0x71}, {0x40, 0xff}, {0x41, 0xff}, {0x42, 0xff}, {0x43, 0xff}, {0x44, 0xff}, {0x45, 0xff}, {0x46, 0xff}, {0x47, 0xff}, {0x48, 0xff}, {0x49, 0xff}, {0x4a, 0xfe}, {0x4b, 0xff}, {0x4c, 0x00}, {0x4d, 0x00}, {0x4e, 0xff}, {0x4f, 0xff}, {0x50, 0xff}, {0x51, 0xff}, {0x52, 0xff}, {0x53, 0xff}, {0x54, 0xff}, {0x55, 0xff}, {0x56, 0xff}, {0x57, 0xff}, {0x58, 0xff}, {0x59, 0xff}, {0x5a, 0xff}, {0x5b, 0xfe}, {0x5c, 0xff}, {0x5d, 0x8f}, {0x5e, 0xff}, {0x5f, 0x8f}, {0x60, 0xa2}, {0x61, 0x4a}, {0x62, 0xf3}, {0x63, 0x75}, {0x64, 0xf0}, {0x65, 0x00}, {0x66, 0x55}, {0x67, 0x92}, {0x68, 0xa0}, {0x69, 0x4a}, {0x6a, 0x22}, {0x6b, 0x00}, {0x6c, 0x33}, {0x6d, 0x44}, {0x6e, 0x22}, {0x6f, 0x84}, {0x70, 0x0b}, {0x72, 0x10}, {0x73, 0x50}, {0x74, 0x21}, {0x76, 0x00}, {0x77, 0xa5}, {0x78, 0x80}, {0x79, 0x80}, {0x7a, 0x80}, {0x7b, 0xe2}, {0x7c, 0x00}, {0x7d, 0xf7}, {0x7e, 0x00}, {0x7f, 0x00}, }; reg_w_buf(gspca_dev, reg_init_1, ARRAY_SIZE(reg_init_1)); reg_w_buf(gspca_dev, tp6810_ov_init_common, ARRAY_SIZE(tp6810_ov_init_common)); reg_w_buf(gspca_dev, reg_init_2, ARRAY_SIZE(reg_init_2)); i2c_w(gspca_dev, 0x12, 0x80); /* sensor reset */ msleep(10); i2c_w_buf(gspca_dev, sensor_init, ARRAY_SIZE(sensor_init)); } /* set the gain and exposure */ static void setexposure(struct gspca_dev *gspca_dev, s32 expo, s32 gain, s32 blue, s32 red) { struct sd *sd = (struct sd *) gspca_dev; if (sd->sensor == SENSOR_CX0342) { expo = (expo << 2) - 1; i2c_w(gspca_dev, CX0342_EXPO_LINE_L, expo); i2c_w(gspca_dev, CX0342_EXPO_LINE_H, expo >> 8); if (sd->bridge == BRIDGE_TP6800) i2c_w(gspca_dev, CX0342_RAW_GBGAIN_H, gain >> 8); i2c_w(gspca_dev, CX0342_RAW_GBGAIN_L, gain); if (sd->bridge == BRIDGE_TP6800) i2c_w(gspca_dev, CX0342_RAW_GRGAIN_H, gain >> 8); i2c_w(gspca_dev, CX0342_RAW_GRGAIN_L, gain); if (sd->sensor == SENSOR_CX0342) { if (sd->bridge == BRIDGE_TP6800) i2c_w(gspca_dev, CX0342_RAW_BGAIN_H, blue >> 8); i2c_w(gspca_dev, CX0342_RAW_BGAIN_L, blue); if (sd->bridge == BRIDGE_TP6800) i2c_w(gspca_dev, CX0342_RAW_RGAIN_H, red >> 8); i2c_w(gspca_dev, CX0342_RAW_RGAIN_L, red); } i2c_w(gspca_dev, CX0342_SYS_CTRL_0, sd->bridge == BRIDGE_TP6800 ? 0x80 : 0x81); return; } /* soi763a */ i2c_w(gspca_dev, 0x10, /* AEC_H (exposure time) */ expo); /* i2c_w(gspca_dev, 0x76, 0x02); * AEC_L ([1:0] */ i2c_w(gspca_dev, 0x00, /* gain */ gain); } /* set the JPEG quantization tables */ static void set_dqt(struct gspca_dev *gspca_dev, u8 q) { struct sd *sd = (struct sd *) gspca_dev; /* update the jpeg quantization tables */ gspca_dbg(gspca_dev, D_STREAM, "q %d -> %d\n", sd->quality, q); sd->quality = q; if (q > 16) q = 16; if (sd->sensor == SENSOR_SOI763A) jpeg_set_qual(sd->jpeg_hdr, jpeg_q[q]); else memcpy(&sd->jpeg_hdr[JPEG_QT0_OFFSET - 1], DQT[q], sizeof DQT[0]); } /* set the JPEG compression quality factor */ static void setquality(struct gspca_dev *gspca_dev, s32 q) { struct sd *sd = (struct sd *) gspca_dev; if (q != 16) q = 15 - q; reg_w(gspca_dev, TP6800_R7A_BLK_THRLD, 0x00); reg_w(gspca_dev, TP6800_R79_QUALITY, 0x04); reg_w(gspca_dev, TP6800_R79_QUALITY, q); /* auto quality */ if (q == 15 && sd->bridge == BRIDGE_TP6810) { msleep(4); reg_w(gspca_dev, TP6800_R7A_BLK_THRLD, 0x19); } } static const u8 color_null[18] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; static const u8 color_gain[NSENSORS][18] = { [SENSOR_CX0342] = {0x4c, 0x00, 0xa9, 0x00, 0x31, 0x00, /* Y R/G/B (LE values) */ 0xb6, 0x03, 0x6c, 0x03, 0xe0, 0x00, /* U R/G/B */ 0xdf, 0x00, 0x46, 0x03, 0xdc, 0x03}, /* V R/G/B */ [SENSOR_SOI763A] = {0x4c, 0x00, 0x95, 0x00, 0x1d, 0x00, /* Y R/G/B (LE values) */ 0xb6, 0x03, 0x6c, 0x03, 0xd7, 0x00, /* U R/G/B */ 0xd5, 0x00, 0x46, 0x03, 0xdc, 0x03}, /* V R/G/B */ }; static void setgamma(struct gspca_dev *gspca_dev, s32 gamma) { struct sd *sd = (struct sd *) gspca_dev; #define NGAMMA 6 static const u8 gamma_tb[NGAMMA][3][1024] = { { /* gamma 0 - from tp6800 + soi763a */ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x02, 0x02, 0x03, 0x05, 0x07, 0x07, 0x08, 0x09, 0x09, 0x0a, 0x0c, 0x0c, 0x0d, 0x0e, 0x0e, 0x10, 0x11, 0x11, 0x12, 0x14, 0x14, 0x15, 0x16, 0x16, 0x17, 0x17, 0x18, 0x1a, 0x1a, 0x1b, 0x1b, 0x1c, 0x1e, 0x1e, 0x1f, 0x1f, 0x20, 0x20, 0x22, 0x23, 0x23, 0x25, 0x25, 0x26, 0x26, 0x27, 0x27, 0x28, 0x28, 0x29, 0x29, 0x2b, 0x2c, 0x2c, 0x2d, 0x2d, 0x2f, 0x2f, 0x30, 0x30, 0x31, 0x31, 0x33, 0x33, 0x34, 0x34, 0x34, 0x35, 0x35, 0x37, 0x37, 0x38, 0x38, 0x39, 0x39, 0x3a, 0x3a, 0x3b, 0x3b, 0x3b, 0x3c, 0x3c, 0x3d, 0x3d, 0x3f, 0x3f, 0x40, 0x40, 0x40, 0x42, 0x42, 0x43, 0x43, 0x44, 0x44, 0x44, 0x45, 0x45, 0x47, 0x47, 0x47, 0x48, 0x48, 0x49, 0x49, 0x4a, 0x4a, 0x4a, 0x4b, 0x4b, 0x4b, 0x4c, 0x4c, 0x4d, 0x4d, 0x4d, 0x4f, 0x4f, 0x50, 0x50, 0x50, 0x52, 0x52, 0x52, 0x53, 0x53, 0x54, 0x54, 0x54, 0x55, 0x55, 0x55, 0x56, 0x56, 0x58, 0x58, 0x58, 0x59, 0x59, 0x59, 0x5a, 0x5a, 0x5a, 0x5b, 0x5b, 0x5b, 0x5c, 0x5c, 0x5c, 0x5e, 0x5e, 0x5e, 0x5f, 0x5f, 0x5f, 0x60, 0x60, 0x60, 0x61, 0x61, 0x61, 0x62, 0x62, 0x62, 0x63, 0x63, 0x63, 0x65, 0x65, 0x65, 0x66, 0x66, 0x66, 0x67, 0x67, 0x67, 0x68, 0x68, 0x68, 0x69, 0x69, 0x69, 0x69, 0x6a, 0x6a, 0x6a, 0x6c, 0x6c, 0x6c, 0x6d, 0x6d, 0x6d, 0x6e, 0x6e, 0x6e, 0x6e, 0x6f, 0x6f, 0x6f, 0x70, 0x70, 0x70, 0x71, 0x71, 0x71, 0x71, 0x73, 0x73, 0x73, 0x74, 0x74, 0x74, 0x74, 0x75, 0x75, 0x75, 0x77, 0x77, 0x77, 0x77, 0x78, 0x78, 0x78, 0x79, 0x79, 0x79, 0x79, 0x7a, 0x7a, 0x7a, 0x7a, 0x7b, 0x7b, 0x7b, 0x7c, 0x7c, 0x7c, 0x7c, 0x7d, 0x7d, 0x7d, 0x7d, 0x7f, 0x7f, 0x7f, 0x80, 0x80, 0x80, 0x80, 0x81, 0x81, 0x81, 0x81, 0x82, 0x82, 0x82, 0x82, 0x84, 0x84, 0x84, 0x85, 0x85, 0x85, 0x85, 0x86, 0x86, 0x86, 0x86, 0x88, 0x88, 0x88, 0x88, 0x89, 0x89, 0x89, 0x89, 0x8a, 0x8a, 0x8a, 0x8a, 0x8b, 0x8b, 0x8b, 0x8b, 0x8d, 0x8d, 0x8d, 0x8d, 0x8e, 0x8e, 0x8e, 0x8e, 0x8f, 0x8f, 0x8f, 0x8f, 0x90, 0x90, 0x90, 0x90, 0x90, 0x91, 0x91, 0x91, 0x91, 0x92, 0x92, 0x92, 0x92, 0x93, 0x93, 0x93, 0x93, 0x94, 0x94, 0x94, 0x94, 0x96, 0x96, 0x96, 0x96, 0x96, 0x97, 0x97, 0x97, 0x97, 0x98, 0x98, 0x98, 0x98, 0x99, 0x99, 0x99, 0x99, 0x99, 0x9a, 0x9a, 0x9a, 0x9a, 0x9b, 0x9b, 0x9b, 0x9b, 0x9c, 0x9c, 0x9c, 0x9c, 0x9c, 0x9d, 0x9d, 0x9d, 0x9d, 0x9e, 0x9e, 0x9e, 0x9e, 0x9e, 0xa0, 0xa0, 0xa0, 0xa0, 0xa1, 0xa1, 0xa1, 0xa1, 0xa1, 0xa2, 0xa2, 0xa2, 0xa2, 0xa3, 0xa3, 0xa3, 0xa3, 0xa3, 0xa4, 0xa4, 0xa4, 0xa4, 0xa4, 0xa5, 0xa5, 0xa5, 0xa5, 0xa6, 0xa6, 0xa6, 0xa6, 0xa6, 0xa8, 0xa8, 0xa8, 0xa8, 0xa8, 0xa9, 0xa9, 0xa9, 0xa9, 0xab, 0xab, 0xab, 0xab, 0xab, 0xac, 0xac, 0xac, 0xac, 0xac, 0xad, 0xad, 0xad, 0xad, 0xae, 0xae, 0xae, 0xae, 0xae, 0xaf, 0xaf, 0xaf, 0xaf, 0xaf, 0xb0, 0xb0, 0xb0, 0xb0, 0xb0, 0xb1, 0xb1, 0xb1, 0xb1, 0xb1, 0xb2, 0xb2, 0xb2, 0xb2, 0xb2, 0xb3, 0xb3, 0xb3, 0xb3, 0xb4, 0xb4, 0xb4, 0xb4, 0xb4, 0xb6, 0xb6, 0xb6, 0xb6, 0xb6, 0xb7, 0xb7, 0xb7, 0xb7, 0xb7, 0xb8, 0xb8, 0xb8, 0xb8, 0xb8, 0xb9, 0xb9, 0xb9, 0xb9, 0xb9, 0xba, 0xba, 0xba, 0xba, 0xba, 0xbc, 0xbc, 0xbc, 0xbc, 0xbc, 0xbd, 0xbd, 0xbd, 0xbd, 0xbd, 0xbe, 0xbe, 0xbe, 0xbe, 0xbe, 0xbf, 0xbf, 0xbf, 0xbf, 0xbf, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc2, 0xc2, 0xc2, 0xc2, 0xc2, 0xc3, 0xc3, 0xc3, 0xc3, 0xc3, 0xc4, 0xc4, 0xc4, 0xc4, 0xc4, 0xc5, 0xc5, 0xc5, 0xc5, 0xc5, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc7, 0xc7, 0xc7, 0xc7, 0xc7, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xc9, 0xca, 0xca, 0xca, 0xca, 0xca, 0xcb, 0xcb, 0xcb, 0xcb, 0xcb, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xce, 0xce, 0xce, 0xce, 0xce, 0xcf, 0xcf, 0xcf, 0xcf, 0xcf, 0xd0, 0xd0, 0xd0, 0xd0, 0xd0, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd1, 0xd3, 0xd3, 0xd3, 0xd3, 0xd3, 0xd4, 0xd4, 0xd4, 0xd4, 0xd4, 0xd6, 0xd6, 0xd6, 0xd6, 0xd6, 0xd7, 0xd7, 0xd7, 0xd7, 0xd7, 0xd8, 0xd8, 0xd8, 0xd8, 0xd8, 0xd9, 0xd9, 0xd9, 0xd9, 0xd9, 0xda, 0xda, 0xda, 0xda, 0xda, 0xdb, 0xdb, 0xdb, 0xdb, 0xdb, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xde, 0xde, 0xde, 0xde, 0xde, 0xde, 0xdf, 0xdf, 0xdf, 0xdf, 0xdf, 0xe0, 0xe0, 0xe0, 0xe0, 0xe0, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe2, 0xe2, 0xe2, 0xe2, 0xe2, 0xe3, 0xe3, 0xe3, 0xe3, 0xe3, 0xe4, 0xe4, 0xe4, 0xe4, 0xe4, 0xe5, 0xe5, 0xe5, 0xe5, 0xe5, 0xe6, 0xe6, 0xe6, 0xe6, 0xe6, 0xe7, 0xe7, 0xe7, 0xe7, 0xe7, 0xe8, 0xe8, 0xe8, 0xe8, 0xe8, 0xe9, 0xe9, 0xe9, 0xe9, 0xeb, 0xeb, 0xeb, 0xeb, 0xeb, 0xec, 0xec, 0xec, 0xec, 0xec, 0xed, 0xed, 0xed, 0xed, 0xed, 0xee, 0xee, 0xee, 0xee, 0xee, 0xef, 0xef, 0xef, 0xef, 0xef, 0xf0, 0xf0, 0xf0, 0xf0, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf3, 0xf3, 0xf3, 0xf3, 0xf3, 0xf4, 0xf4, 0xf4, 0xf4, 0xf4, 0xf5, 0xf5, 0xf5, 0xf5, 0xf6, 0xf6, 0xf6, 0xf6, 0xf6, 0xf7, 0xf7, 0xf7, 0xf7, 0xf8, 0xf8, 0xf8, 0xf8, 0xf8, 0xf9, 0xf9, 0xf9, 0xf9, 0xfa, 0xfa, 0xfa, 0xfa, 0xfa, 0xfa, 0xfa, 0xfa, 0xfa, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 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0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb, 0xfb} }, { /* gamma 3 - from tp6810 + cx0342 */ {0x08, 0x09, 0x0c, 0x0d, 0x10, 0x11, 0x14, 0x15, 0x17, 0x18, 0x1a, 0x1c, 0x1e, 0x1f, 0x20, 0x23, 0x25, 0x26, 0x27, 0x28, 0x2b, 0x2c, 0x2d, 0x2f, 0x30, 0x31, 0x33, 0x34, 0x35, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3f, 0x40, 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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, }, }; reg_w(gspca_dev, TP6800_R21_ENDP_1_CTL, 0x00); if (sd->bridge == BRIDGE_TP6810) reg_w(gspca_dev, 0x02, 0x28); /* msleep(50); */ bulk_w(gspca_dev, 0x00, gamma_tb[gamma][0], 1024); bulk_w(gspca_dev, 0x01, gamma_tb[gamma][1], 1024); bulk_w(gspca_dev, 0x02, gamma_tb[gamma][2], 1024); if (sd->bridge == BRIDGE_TP6810) { int i; reg_w(gspca_dev, 0x02, 0x2b); reg_w(gspca_dev, 0x02, 0x28); for (i = 0; i < 6; i++) reg_w(gspca_dev, TP6800_R55_GAMMA_R, gamma_tb[gamma][0][i]); reg_w(gspca_dev, 0x02, 0x2b); reg_w(gspca_dev, 0x02, 0x28); for (i = 0; i < 6; i++) reg_w(gspca_dev, TP6800_R56_GAMMA_G, gamma_tb[gamma][1][i]); reg_w(gspca_dev, 0x02, 0x2b); reg_w(gspca_dev, 0x02, 0x28); for (i = 0; i < 6; i++) reg_w(gspca_dev, TP6800_R57_GAMMA_B, gamma_tb[gamma][2][i]); reg_w(gspca_dev, 0x02, 0x28); } reg_w(gspca_dev, TP6800_R21_ENDP_1_CTL, 0x03); /* msleep(50); */ } static void setsharpness(struct gspca_dev *gspca_dev, s32 val) { struct sd *sd = (struct sd *) gspca_dev; if (sd->bridge == BRIDGE_TP6800) { val |= 0x08; /* grid compensation enable */ if (gspca_dev->pixfmt.width == 640) reg_w(gspca_dev, TP6800_R78_FORMAT, 0x00); /* vga */ else val |= 0x04; /* scaling down enable */ reg_w(gspca_dev, TP6800_R5D_DEMOSAIC_CFG, val); } else { val = (val << 5) | 0x08; reg_w(gspca_dev, 0x59, val); } } static void setautogain(struct gspca_dev *gspca_dev, s32 val) { struct sd *sd = (struct sd *) gspca_dev; sd->ag_cnt = val ? AG_CNT_START : -1; } /* set the resolution for sensor cx0342 */ static void set_resolution(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; reg_w(gspca_dev, TP6800_R21_ENDP_1_CTL, 0x00); if (gspca_dev->pixfmt.width == 320) { reg_w(gspca_dev, TP6800_R3F_FRAME_RATE, 0x06); msleep(100); i2c_w(gspca_dev, CX0342_AUTO_ADC_CALIB, 0x01); msleep(100); reg_w(gspca_dev, TP6800_R21_ENDP_1_CTL, 0x03); reg_w(gspca_dev, TP6800_R78_FORMAT, 0x01); /* qvga */ reg_w(gspca_dev, TP6800_R5D_DEMOSAIC_CFG, 0x0d); i2c_w(gspca_dev, CX0342_EXPO_LINE_L, 0x37); i2c_w(gspca_dev, CX0342_EXPO_LINE_H, 0x01); } else { reg_w(gspca_dev, TP6800_R3F_FRAME_RATE, 0x05); msleep(100); i2c_w(gspca_dev, CX0342_AUTO_ADC_CALIB, 0x01); msleep(100); reg_w(gspca_dev, TP6800_R21_ENDP_1_CTL, 0x03); reg_w(gspca_dev, TP6800_R78_FORMAT, 0x00); /* vga */ reg_w(gspca_dev, TP6800_R5D_DEMOSAIC_CFG, 0x09); i2c_w(gspca_dev, CX0342_EXPO_LINE_L, 0xcf); i2c_w(gspca_dev, CX0342_EXPO_LINE_H, 0x00); } i2c_w(gspca_dev, CX0342_SYS_CTRL_0, 0x01); bulk_w(gspca_dev, 0x03, color_gain[SENSOR_CX0342], ARRAY_SIZE(color_gain[0])); setgamma(gspca_dev, v4l2_ctrl_g_ctrl(sd->gamma)); if (sd->sensor == SENSOR_SOI763A) setquality(gspca_dev, v4l2_ctrl_g_ctrl(sd->jpegqual)); } /* convert the frame rate to a tp68x0 value */ static int get_fr_idx(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int i; if (sd->bridge == BRIDGE_TP6800) { for (i = 0; i < ARRAY_SIZE(rates) - 1; i++) { if (sd->framerate >= rates[i]) break; } i = 6 - i; /* 1 = 5fps .. 6 = 30fps */ /* 640x480 * 30 fps does not work */ if (i == 6 /* if 30 fps */ && gspca_dev->pixfmt.width == 640) i = 0x05; /* 15 fps */ } else { for (i = 0; i < ARRAY_SIZE(rates_6810) - 1; i++) { if (sd->framerate >= rates_6810[i]) break; } i = 7 - i; /* 3 = 5fps .. 7 = 30fps */ /* 640x480 * 30 fps does not work */ if (i == 7 /* if 30 fps */ && gspca_dev->pixfmt.width == 640) i = 6; /* 15 fps */ i |= 0x80; /* clock * 1 */ } return i; } static void setframerate(struct gspca_dev *gspca_dev, s32 val) { struct sd *sd = (struct sd *) gspca_dev; u8 fr_idx; fr_idx = get_fr_idx(gspca_dev); if (sd->bridge == BRIDGE_TP6810) { reg_r(gspca_dev, 0x7b); reg_w(gspca_dev, 0x7b, sd->sensor == SENSOR_CX0342 ? 0x10 : 0x90); if (val >= 128) fr_idx = 0xf0; /* lower frame rate */ } reg_w(gspca_dev, TP6800_R3F_FRAME_RATE, fr_idx); if (sd->sensor == SENSOR_CX0342) i2c_w(gspca_dev, CX0342_AUTO_ADC_CALIB, 0x01); } static void setrgain(struct gspca_dev *gspca_dev, s32 rgain) { i2c_w(gspca_dev, CX0342_RAW_RGAIN_H, rgain >> 8); i2c_w(gspca_dev, CX0342_RAW_RGAIN_L, rgain); i2c_w(gspca_dev, CX0342_SYS_CTRL_0, 0x80); } static int sd_setgain(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; s32 val = gspca_dev->gain->val; if (sd->sensor == SENSOR_CX0342) { s32 old = gspca_dev->gain->cur.val ? gspca_dev->gain->cur.val : 1; sd->blue->val = sd->blue->val * val / old; if (sd->blue->val > 4095) sd->blue->val = 4095; sd->red->val = sd->red->val * val / old; if (sd->red->val > 4095) sd->red->val = 4095; } if (gspca_dev->streaming) { if (sd->sensor == SENSOR_CX0342) setexposure(gspca_dev, gspca_dev->exposure->val, gspca_dev->gain->val, sd->blue->val, sd->red->val); else setexposure(gspca_dev, gspca_dev->exposure->val, gspca_dev->gain->val, 0, 0); } return gspca_dev->usb_err; } static void setbgain(struct gspca_dev *gspca_dev, s32 bgain) { i2c_w(gspca_dev, CX0342_RAW_BGAIN_H, bgain >> 8); i2c_w(gspca_dev, CX0342_RAW_BGAIN_L, bgain); i2c_w(gspca_dev, CX0342_SYS_CTRL_0, 0x80); } /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) { struct sd *sd = (struct sd *) gspca_dev; sd->bridge = id->driver_info; gspca_dev->cam.cam_mode = vga_mode; gspca_dev->cam.nmodes = ARRAY_SIZE(vga_mode); gspca_dev->cam.mode_framerates = sd->bridge == BRIDGE_TP6800 ? framerates : framerates_6810; sd->framerate = DEFAULT_FRAME_RATE; return 0; } /* this function is called at probe and resume time */ static int sd_init(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; static const struct cmd tp6800_preinit[] = { {TP6800_R10_SIF_TYPE, 0x01}, /* sif */ {TP6800_R11_SIF_CONTROL, 0x01}, {TP6800_R15_GPIO_PU, 0x9f}, {TP6800_R16_GPIO_PD, 0x9f}, {TP6800_R17_GPIO_IO, 0x80}, {TP6800_R18_GPIO_DATA, 0x40}, /* LED off */ }; static const struct cmd tp6810_preinit[] = { {TP6800_R2F_TIMING_CFG, 0x2f}, {TP6800_R15_GPIO_PU, 0x6f}, {TP6800_R16_GPIO_PD, 0x40}, {TP6800_R17_GPIO_IO, 0x9f}, {TP6800_R18_GPIO_DATA, 0xc1}, /* LED off */ }; if (sd->bridge == BRIDGE_TP6800) reg_w_buf(gspca_dev, tp6800_preinit, ARRAY_SIZE(tp6800_preinit)); else reg_w_buf(gspca_dev, tp6810_preinit, ARRAY_SIZE(tp6810_preinit)); msleep(15); reg_r(gspca_dev, TP6800_R18_GPIO_DATA); gspca_dbg(gspca_dev, D_PROBE, "gpio: %02x\n", gspca_dev->usb_buf[0]); /* values: * 0x80: snapshot button * 0x40: LED * 0x20: (bridge / sensor) reset for tp6810 ? * 0x07: sensor type ? */ /* guess the sensor type */ if (force_sensor >= 0) { sd->sensor = force_sensor; } else { if (sd->bridge == BRIDGE_TP6800) { /*fixme: not sure this is working*/ switch (gspca_dev->usb_buf[0] & 0x07) { case 0: sd->sensor = SENSOR_SOI763A; break; case 1: sd->sensor = SENSOR_CX0342; break; } } else { int sensor; sensor = probe_6810(gspca_dev); if (sensor < 0) { pr_warn("Unknown sensor %d - forced to soi763a\n", -sensor); sensor = SENSOR_SOI763A; } sd->sensor = sensor; } } if (sd->sensor == SENSOR_SOI763A) { pr_info("Sensor soi763a\n"); if (sd->bridge == BRIDGE_TP6810) { soi763a_6810_init(gspca_dev); } } else { pr_info("Sensor cx0342\n"); if (sd->bridge == BRIDGE_TP6810) { cx0342_6810_init(gspca_dev); } } set_dqt(gspca_dev, 0); return 0; } /* This function is called before choosing the alt setting */ static int sd_isoc_init(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; static const struct cmd cx_sensor_init[] = { {CX0342_AUTO_ADC_CALIB, 0x81}, {CX0342_EXPO_LINE_L, 0x37}, {CX0342_EXPO_LINE_H, 0x01}, {CX0342_RAW_GRGAIN_L, 0x00}, {CX0342_RAW_GBGAIN_L, 0x00}, {CX0342_RAW_RGAIN_L, 0x00}, {CX0342_RAW_BGAIN_L, 0x00}, {CX0342_SYS_CTRL_0, 0x81}, }; static const struct cmd cx_bridge_init[] = { {0x4d, 0x00}, {0x4c, 0xff}, {0x4e, 0xff}, {0x4f, 0x00}, }; static const struct cmd ov_sensor_init[] = { {0x10, 0x75}, /* exposure */ {0x76, 0x03}, {0x00, 0x00}, /* gain */ }; static const struct cmd ov_bridge_init[] = { {0x7b, 0x90}, {TP6800_R3F_FRAME_RATE, 0x87}, }; if (sd->bridge == BRIDGE_TP6800) return 0; if (sd->sensor == SENSOR_CX0342) { reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x20); reg_w(gspca_dev, TP6800_R3F_FRAME_RATE, 0x87); i2c_w_buf(gspca_dev, cx_sensor_init, ARRAY_SIZE(cx_sensor_init)); reg_w_buf(gspca_dev, cx_bridge_init, ARRAY_SIZE(cx_bridge_init)); bulk_w(gspca_dev, 0x03, color_null, sizeof color_null); reg_w(gspca_dev, 0x59, 0x40); } else { reg_w(gspca_dev, TP6800_R12_SIF_ADDR_S, 0x21); i2c_w_buf(gspca_dev, ov_sensor_init, ARRAY_SIZE(ov_sensor_init)); reg_r(gspca_dev, 0x7b); reg_w_buf(gspca_dev, ov_bridge_init, ARRAY_SIZE(ov_bridge_init)); } reg_w(gspca_dev, TP6800_R78_FORMAT, gspca_dev->curr_mode ? 0x00 : 0x01); return gspca_dev->usb_err; } static void set_led(struct gspca_dev *gspca_dev, int on) { u8 data; reg_r(gspca_dev, TP6800_R18_GPIO_DATA); data = gspca_dev->usb_buf[0]; if (on) data &= ~0x40; else data |= 0x40; reg_w(gspca_dev, TP6800_R18_GPIO_DATA, data); } static void cx0342_6800_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; static const struct cmd reg_init[] = { /* fixme: is this useful? */ {TP6800_R17_GPIO_IO, 0x9f}, {TP6800_R16_GPIO_PD, 0x40}, {TP6800_R10_SIF_TYPE, 0x00}, /* i2c 8 bits */ {TP6800_R50, 0x00}, {TP6800_R51, 0x00}, {TP6800_R52, 0xff}, {TP6800_R53, 0x03}, {TP6800_R54_DARK_CFG, 0x07}, {TP6800_R5C_EDGE_THRLD, 0x40}, {TP6800_R7A_BLK_THRLD, 0x40}, {TP6800_R2F_TIMING_CFG, 0x17}, {TP6800_R30_SENSOR_CFG, 0x18}, /* G1B..RG0 */ {TP6800_R37_FRONT_DARK_ST, 0x00}, {TP6800_R38_FRONT_DARK_END, 0x00}, {TP6800_R39_REAR_DARK_ST_L, 0x00}, {TP6800_R3A_REAR_DARK_ST_H, 0x00}, {TP6800_R3B_REAR_DARK_END_L, 0x00}, {TP6800_R3C_REAR_DARK_END_H, 0x00}, {TP6800_R3D_HORIZ_DARK_LINE_L, 0x00}, {TP6800_R3E_HORIZ_DARK_LINE_H, 0x00}, {TP6800_R21_ENDP_1_CTL, 0x03}, {TP6800_R31_PIXEL_START, 0x0b}, {TP6800_R32_PIXEL_END_L, 0x8a}, {TP6800_R33_PIXEL_END_H, 0x02}, {TP6800_R34_LINE_START, 0x0e}, {TP6800_R35_LINE_END_L, 0xf4}, {TP6800_R36_LINE_END_H, 0x01}, {TP6800_R78_FORMAT, 0x00}, {TP6800_R12_SIF_ADDR_S, 0x20}, /* cx0342 i2c addr */ }; static const struct cmd sensor_init[] = { {CX0342_OUTPUT_CTRL, 0x07}, {CX0342_BYPASS_MODE, 0x58}, {CX0342_GPXLTHD_L, 0x16}, {CX0342_RBPXLTHD_L, 0x16}, {CX0342_PLANETHD_L, 0xc0}, {CX0342_PLANETHD_H, 0x03}, {CX0342_RB_GAP_L, 0xff}, {CX0342_RB_GAP_H, 0x07}, {CX0342_G_GAP_L, 0xff}, {CX0342_G_GAP_H, 0x07}, {CX0342_RST_OVERFLOW_L, 0x5c}, {CX0342_RST_OVERFLOW_H, 0x01}, {CX0342_DATA_OVERFLOW_L, 0xfc}, {CX0342_DATA_OVERFLOW_H, 0x03}, {CX0342_DATA_UNDERFLOW_L, 0x00}, {CX0342_DATA_UNDERFLOW_H, 0x00}, {CX0342_SYS_CTRL_0, 0x40}, {CX0342_GLOBAL_GAIN, 0x01}, {CX0342_CLOCK_GEN, 0x00}, {CX0342_SYS_CTRL_0, 0x02}, {CX0342_IDLE_CTRL, 0x05}, {CX0342_ADCGN, 0x00}, {CX0342_ADC_CTL, 0x00}, {CX0342_LVRST_BLBIAS, 0x01}, {CX0342_VTHSEL, 0x0b}, {CX0342_RAMP_RIV, 0x0b}, {CX0342_LDOSEL, 0x07}, {CX0342_SPV_VALUE_L, 0x40}, {CX0342_SPV_VALUE_H, 0x02}, }; reg_w_buf(gspca_dev, reg_init, ARRAY_SIZE(reg_init)); i2c_w_buf(gspca_dev, sensor_init, ARRAY_SIZE(sensor_init)); i2c_w_buf(gspca_dev, cx0342_timing_seq, ARRAY_SIZE(cx0342_timing_seq)); reg_w(gspca_dev, TP6800_R5C_EDGE_THRLD, 0x10); reg_w(gspca_dev, TP6800_R54_DARK_CFG, 0x00); i2c_w(gspca_dev, CX0342_EXPO_LINE_H, 0x00); i2c_w(gspca_dev, CX0342_SYS_CTRL_0, 0x01); if (sd->sensor == SENSOR_CX0342) setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), v4l2_ctrl_g_ctrl(sd->blue), v4l2_ctrl_g_ctrl(sd->red)); else setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), 0, 0); set_led(gspca_dev, 1); set_resolution(gspca_dev); } static void cx0342_6810_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; static const struct cmd sensor_init_2[] = { {CX0342_EXPO_LINE_L, 0x6f}, {CX0342_EXPO_LINE_H, 0x02}, {CX0342_RAW_GRGAIN_L, 0x00}, {CX0342_RAW_GBGAIN_L, 0x00}, {CX0342_RAW_RGAIN_L, 0x00}, {CX0342_RAW_BGAIN_L, 0x00}, {CX0342_SYS_CTRL_0, 0x81}, }; static const struct cmd bridge_init_2[] = { {0x4d, 0x00}, {0x4c, 0xff}, {0x4e, 0xff}, {0x4f, 0x00}, {TP6800_R7A_BLK_THRLD, 0x00}, {TP6800_R79_QUALITY, 0x04}, {TP6800_R79_QUALITY, 0x01}, }; static const struct cmd bridge_init_3[] = { {TP6800_R31_PIXEL_START, 0x08}, {TP6800_R32_PIXEL_END_L, 0x87}, {TP6800_R33_PIXEL_END_H, 0x02}, {TP6800_R34_LINE_START, 0x0e}, {TP6800_R35_LINE_END_L, 0xf4}, {TP6800_R36_LINE_END_H, 0x01}, }; static const struct cmd sensor_init_3[] = { {CX0342_AUTO_ADC_CALIB, 0x81}, {CX0342_EXPO_LINE_L, 0x6f}, {CX0342_EXPO_LINE_H, 0x02}, {CX0342_RAW_GRGAIN_L, 0x00}, {CX0342_RAW_GBGAIN_L, 0x00}, {CX0342_RAW_RGAIN_L, 0x00}, {CX0342_RAW_BGAIN_L, 0x00}, {CX0342_SYS_CTRL_0, 0x81}, }; static const struct cmd bridge_init_5[] = { {0x4d, 0x00}, {0x4c, 0xff}, {0x4e, 0xff}, {0x4f, 0x00}, }; static const struct cmd sensor_init_4[] = { {CX0342_EXPO_LINE_L, 0xd3}, {CX0342_EXPO_LINE_H, 0x01}, /*fixme: gains, but 00..80 only*/ {CX0342_RAW_GRGAIN_L, 0x40}, {CX0342_RAW_GBGAIN_L, 0x40}, {CX0342_RAW_RGAIN_L, 0x40}, {CX0342_RAW_BGAIN_L, 0x40}, {CX0342_SYS_CTRL_0, 0x81}, }; static const struct cmd sensor_init_5[] = { {CX0342_IDLE_CTRL, 0x05}, {CX0342_ADCGN, 0x00}, {CX0342_ADC_CTL, 0x00}, {CX0342_LVRST_BLBIAS, 0x01}, {CX0342_VTHSEL, 0x0b}, {CX0342_RAMP_RIV, 0x0b}, {CX0342_LDOSEL, 0x07}, {CX0342_SPV_VALUE_L, 0x40}, {CX0342_SPV_VALUE_H, 0x02}, {CX0342_AUTO_ADC_CALIB, 0x81}, }; reg_w(gspca_dev, 0x22, gspca_dev->alt); i2c_w_buf(gspca_dev, sensor_init_2, ARRAY_SIZE(sensor_init_2)); reg_w_buf(gspca_dev, bridge_init_2, ARRAY_SIZE(bridge_init_2)); reg_w_buf(gspca_dev, tp6810_cx_init_common, ARRAY_SIZE(tp6810_cx_init_common)); reg_w_buf(gspca_dev, bridge_init_3, ARRAY_SIZE(bridge_init_3)); if (gspca_dev->curr_mode) { reg_w(gspca_dev, 0x4a, 0x7f); reg_w(gspca_dev, 0x07, 0x05); reg_w(gspca_dev, TP6800_R78_FORMAT, 0x00); /* vga */ } else { reg_w(gspca_dev, 0x4a, 0xff); reg_w(gspca_dev, 0x07, 0x85); reg_w(gspca_dev, TP6800_R78_FORMAT, 0x01); /* qvga */ } setgamma(gspca_dev, v4l2_ctrl_g_ctrl(sd->gamma)); reg_w_buf(gspca_dev, tp6810_bridge_start, ARRAY_SIZE(tp6810_bridge_start)); setsharpness(gspca_dev, v4l2_ctrl_g_ctrl(sd->sharpness)); bulk_w(gspca_dev, 0x03, color_gain[SENSOR_CX0342], ARRAY_SIZE(color_gain[0])); reg_w(gspca_dev, TP6800_R3F_FRAME_RATE, 0x87); i2c_w_buf(gspca_dev, sensor_init_3, ARRAY_SIZE(sensor_init_3)); reg_w_buf(gspca_dev, bridge_init_5, ARRAY_SIZE(bridge_init_5)); i2c_w_buf(gspca_dev, sensor_init_4, ARRAY_SIZE(sensor_init_4)); reg_w_buf(gspca_dev, bridge_init_5, ARRAY_SIZE(bridge_init_5)); i2c_w_buf(gspca_dev, sensor_init_5, ARRAY_SIZE(sensor_init_5)); set_led(gspca_dev, 1); /* setquality(gspca_dev, v4l2_ctrl_g_ctrl(sd->jpegqual)); */ } static void soi763a_6800_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; static const struct cmd reg_init[] = { {TP6800_R79_QUALITY, 0x04}, {TP6800_R79_QUALITY, 0x01}, {TP6800_R10_SIF_TYPE, 0x00}, /* i2c 8 bits */ {TP6800_R50, 0x00}, {TP6800_R51, 0x00}, {TP6800_R52, 0xff}, {TP6800_R53, 0x03}, {TP6800_R54_DARK_CFG, 0x07}, {TP6800_R5C_EDGE_THRLD, 0x40}, {TP6800_R79_QUALITY, 0x03}, {TP6800_R7A_BLK_THRLD, 0x40}, {TP6800_R2F_TIMING_CFG, 0x46}, {TP6800_R30_SENSOR_CFG, 0x10}, /* BG1..G0R */ {TP6800_R37_FRONT_DARK_ST, 0x00}, {TP6800_R38_FRONT_DARK_END, 0x00}, {TP6800_R39_REAR_DARK_ST_L, 0x00}, {TP6800_R3A_REAR_DARK_ST_H, 0x00}, {TP6800_R3B_REAR_DARK_END_L, 0x00}, {TP6800_R3C_REAR_DARK_END_H, 0x00}, {TP6800_R3D_HORIZ_DARK_LINE_L, 0x00}, {TP6800_R3E_HORIZ_DARK_LINE_H, 0x00}, {TP6800_R21_ENDP_1_CTL, 0x03}, {TP6800_R3F_FRAME_RATE, 0x04}, /* 15 fps */ {TP6800_R5D_DEMOSAIC_CFG, 0x0e}, /* scale down - medium edge */ {TP6800_R31_PIXEL_START, 0x1b}, {TP6800_R32_PIXEL_END_L, 0x9a}, {TP6800_R33_PIXEL_END_H, 0x02}, {TP6800_R34_LINE_START, 0x0f}, {TP6800_R35_LINE_END_L, 0xf4}, {TP6800_R36_LINE_END_H, 0x01}, {TP6800_R78_FORMAT, 0x01}, /* qvga */ {TP6800_R12_SIF_ADDR_S, 0x21}, /* soi763a i2c addr */ {TP6800_R1A_SIF_TX_DATA2, 0x00}, }; static const struct cmd sensor_init[] = { {0x12, 0x48}, /* mirror - RGB */ {0x13, 0xa0}, /* clock - no AGC nor AEC */ {0x03, 0xa4}, /* saturation */ {0x04, 0x30}, /* hue */ {0x05, 0x88}, /* contrast */ {0x06, 0x60}, /* brightness */ {0x10, 0x41}, /* AEC */ {0x11, 0x40}, /* clock rate */ {0x13, 0xa0}, {0x14, 0x00}, /* 640x480 */ {0x15, 0x14}, {0x1f, 0x41}, {0x20, 0x80}, {0x23, 0xee}, {0x24, 0x50}, {0x25, 0x7a}, {0x26, 0x00}, {0x27, 0xe2}, {0x28, 0xb0}, {0x2a, 0x00}, {0x2b, 0x00}, {0x2d, 0x81}, {0x2f, 0x9d}, {0x60, 0x80}, {0x61, 0x00}, {0x62, 0x88}, {0x63, 0x11}, {0x64, 0x89}, {0x65, 0x00}, {0x67, 0x94}, {0x68, 0x7a}, {0x69, 0x0f}, {0x6c, 0x80}, {0x6d, 0x80}, {0x6e, 0x80}, {0x6f, 0xff}, {0x71, 0x20}, {0x74, 0x20}, {0x75, 0x86}, {0x77, 0xb5}, {0x17, 0x18}, /* H href start */ {0x18, 0xbf}, /* H href end */ {0x19, 0x03}, /* V start */ {0x1a, 0xf8}, /* V end */ {0x01, 0x80}, /* blue gain */ {0x02, 0x80}, /* red gain */ }; reg_w_buf(gspca_dev, reg_init, ARRAY_SIZE(reg_init)); i2c_w(gspca_dev, 0x12, 0x80); /* sensor reset */ msleep(10); i2c_w_buf(gspca_dev, sensor_init, ARRAY_SIZE(sensor_init)); reg_w(gspca_dev, TP6800_R5C_EDGE_THRLD, 0x10); reg_w(gspca_dev, TP6800_R54_DARK_CFG, 0x00); setsharpness(gspca_dev, v4l2_ctrl_g_ctrl(sd->sharpness)); bulk_w(gspca_dev, 0x03, color_gain[SENSOR_SOI763A], ARRAY_SIZE(color_gain[0])); set_led(gspca_dev, 1); if (sd->sensor == SENSOR_CX0342) setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), v4l2_ctrl_g_ctrl(sd->blue), v4l2_ctrl_g_ctrl(sd->red)); else setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), 0, 0); if (sd->sensor == SENSOR_SOI763A) setquality(gspca_dev, v4l2_ctrl_g_ctrl(sd->jpegqual)); setgamma(gspca_dev, v4l2_ctrl_g_ctrl(sd->gamma)); } static void soi763a_6810_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; static const struct cmd bridge_init_2[] = { {TP6800_R7A_BLK_THRLD, 0x00}, {TP6800_R79_QUALITY, 0x04}, {TP6800_R79_QUALITY, 0x01}, }; static const struct cmd bridge_init_3[] = { {TP6800_R31_PIXEL_START, 0x20}, {TP6800_R32_PIXEL_END_L, 0x9f}, {TP6800_R33_PIXEL_END_H, 0x02}, {TP6800_R34_LINE_START, 0x13}, {TP6800_R35_LINE_END_L, 0xf8}, {TP6800_R36_LINE_END_H, 0x01}, }; static const struct cmd bridge_init_6[] = { {0x08, 0xff}, {0x09, 0xff}, {0x0a, 0x5f}, {0x0b, 0x80}, }; reg_w(gspca_dev, 0x22, gspca_dev->alt); bulk_w(gspca_dev, 0x03, color_null, sizeof color_null); reg_w(gspca_dev, 0x59, 0x40); if (sd->sensor == SENSOR_CX0342) setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), v4l2_ctrl_g_ctrl(sd->blue), v4l2_ctrl_g_ctrl(sd->red)); else setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), 0, 0); reg_w_buf(gspca_dev, bridge_init_2, ARRAY_SIZE(bridge_init_2)); reg_w_buf(gspca_dev, tp6810_ov_init_common, ARRAY_SIZE(tp6810_ov_init_common)); reg_w_buf(gspca_dev, bridge_init_3, ARRAY_SIZE(bridge_init_3)); if (gspca_dev->curr_mode) { reg_w(gspca_dev, 0x4a, 0x7f); reg_w(gspca_dev, 0x07, 0x05); reg_w(gspca_dev, TP6800_R78_FORMAT, 0x00); /* vga */ } else { reg_w(gspca_dev, 0x4a, 0xff); reg_w(gspca_dev, 0x07, 0x85); reg_w(gspca_dev, TP6800_R78_FORMAT, 0x01); /* qvga */ } setgamma(gspca_dev, v4l2_ctrl_g_ctrl(sd->gamma)); reg_w_buf(gspca_dev, tp6810_bridge_start, ARRAY_SIZE(tp6810_bridge_start)); if (gspca_dev->curr_mode) { reg_w(gspca_dev, 0x4f, 0x00); reg_w(gspca_dev, 0x4e, 0x7c); } reg_w(gspca_dev, 0x00, 0x00); setsharpness(gspca_dev, v4l2_ctrl_g_ctrl(sd->sharpness)); bulk_w(gspca_dev, 0x03, color_gain[SENSOR_SOI763A], ARRAY_SIZE(color_gain[0])); set_led(gspca_dev, 1); reg_w(gspca_dev, TP6800_R3F_FRAME_RATE, 0xf0); if (sd->sensor == SENSOR_CX0342) setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), v4l2_ctrl_g_ctrl(sd->blue), v4l2_ctrl_g_ctrl(sd->red)); else setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), 0, 0); reg_w_buf(gspca_dev, bridge_init_6, ARRAY_SIZE(bridge_init_6)); } /* -- start the camera -- */ static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; jpeg_define(sd->jpeg_hdr, gspca_dev->pixfmt.height, gspca_dev->pixfmt.width); set_dqt(gspca_dev, sd->quality); if (sd->bridge == BRIDGE_TP6800) { if (sd->sensor == SENSOR_CX0342) cx0342_6800_start(gspca_dev); else soi763a_6800_start(gspca_dev); } else { if (sd->sensor == SENSOR_CX0342) cx0342_6810_start(gspca_dev); else soi763a_6810_start(gspca_dev); reg_w_buf(gspca_dev, tp6810_late_start, ARRAY_SIZE(tp6810_late_start)); reg_w(gspca_dev, 0x80, 0x03); reg_w(gspca_dev, 0x82, gspca_dev->curr_mode ? 0x0a : 0x0e); if (sd->sensor == SENSOR_CX0342) setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), v4l2_ctrl_g_ctrl(sd->blue), v4l2_ctrl_g_ctrl(sd->red)); else setexposure(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure), v4l2_ctrl_g_ctrl(gspca_dev->gain), 0, 0); if (sd->sensor == SENSOR_SOI763A) setquality(gspca_dev, v4l2_ctrl_g_ctrl(sd->jpegqual)); if (sd->bridge == BRIDGE_TP6810) setautogain(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->autogain)); } setframerate(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure)); return gspca_dev->usb_err; } static void sd_stopN(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; if (sd->bridge == BRIDGE_TP6800) reg_w(gspca_dev, TP6800_R2F_TIMING_CFG, 0x03); set_led(gspca_dev, 0); reg_w(gspca_dev, TP6800_R21_ENDP_1_CTL, 0x00); } static void sd_pkt_scan(struct gspca_dev *gspca_dev, u8 *data, int len) { struct sd *sd = (struct sd *) gspca_dev; /* the start of frame contains: * ff d8 * ff fe * width / 16 * height / 8 * quality */ if (sd->bridge == BRIDGE_TP6810) { if (*data != 0x5a) { /*fixme: don't discard the whole frame..*/ if (*data == 0xaa || *data == 0x00) return; if (*data > 0xc0) { gspca_dbg(gspca_dev, D_FRAM, "bad frame\n"); gspca_dev->last_packet_type = DISCARD_PACKET; return; } } data++; len--; if (len < 2) { gspca_dev->last_packet_type = DISCARD_PACKET; return; } if (*data == 0xff && data[1] == 0xd8) { /*fixme: there may be information in the 4 high bits*/ if (len < 7) { gspca_dev->last_packet_type = DISCARD_PACKET; return; } if ((data[6] & 0x0f) != sd->quality) set_dqt(gspca_dev, data[6] & 0x0f); gspca_frame_add(gspca_dev, FIRST_PACKET, sd->jpeg_hdr, JPEG_HDR_SZ); gspca_frame_add(gspca_dev, INTER_PACKET, data + 7, len - 7); } else if (data[len - 2] == 0xff && data[len - 1] == 0xd9) { gspca_frame_add(gspca_dev, LAST_PACKET, data, len); } else { gspca_frame_add(gspca_dev, INTER_PACKET, data, len); } return; } switch (*data) { case 0x55: gspca_frame_add(gspca_dev, LAST_PACKET, data, 0); if (len < 8 || data[1] != 0xff || data[2] != 0xd8 || data[3] != 0xff || data[4] != 0xfe) { /* Have only seen this with corrupt frames */ gspca_dev->last_packet_type = DISCARD_PACKET; return; } if (data[7] != sd->quality) set_dqt(gspca_dev, data[7]); gspca_frame_add(gspca_dev, FIRST_PACKET, sd->jpeg_hdr, JPEG_HDR_SZ); gspca_frame_add(gspca_dev, INTER_PACKET, data + 8, len - 8); break; case 0xaa: gspca_dev->last_packet_type = DISCARD_PACKET; break; case 0xcc: if (len >= 3 && (data[1] != 0xff || data[2] != 0xd8)) gspca_frame_add(gspca_dev, INTER_PACKET, data + 1, len - 1); else gspca_dev->last_packet_type = DISCARD_PACKET; break; } } static void sd_dq_callback(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int ret, alen; int luma, expo; if (sd->ag_cnt < 0) return; if (--sd->ag_cnt > 5) return; switch (sd->ag_cnt) { /* case 5: */ default: reg_w(gspca_dev, 0x7d, 0x00); break; case 4: reg_w(gspca_dev, 0x27, 0xb0); break; case 3: reg_w(gspca_dev, 0x0c, 0x01); break; case 2: ret = usb_bulk_msg(gspca_dev->dev, usb_rcvbulkpipe(gspca_dev->dev, 0x02), gspca_dev->usb_buf, 32, &alen, 500); if (ret < 0) { pr_err("bulk err %d\n", ret); break; } /* values not used (unknown) */ break; case 1: reg_w(gspca_dev, 0x27, 0xd0); break; case 0: ret = usb_bulk_msg(gspca_dev->dev, usb_rcvbulkpipe(gspca_dev->dev, 0x02), gspca_dev->usb_buf, 32, &alen, 500); if (ret < 0) { pr_err("bulk err %d\n", ret); break; } luma = ((gspca_dev->usb_buf[8] << 8) + gspca_dev->usb_buf[7] + (gspca_dev->usb_buf[11] << 8) + gspca_dev->usb_buf[10] + (gspca_dev->usb_buf[14] << 8) + gspca_dev->usb_buf[13] + (gspca_dev->usb_buf[17] << 8) + gspca_dev->usb_buf[16] + (gspca_dev->usb_buf[20] << 8) + gspca_dev->usb_buf[19] + (gspca_dev->usb_buf[23] << 8) + gspca_dev->usb_buf[22] + (gspca_dev->usb_buf[26] << 8) + gspca_dev->usb_buf[25] + (gspca_dev->usb_buf[29] << 8) + gspca_dev->usb_buf[28]) / 8; if (gspca_dev->pixfmt.width == 640) luma /= 4; reg_w(gspca_dev, 0x7d, 0x00); expo = v4l2_ctrl_g_ctrl(gspca_dev->exposure); ret = gspca_expo_autogain(gspca_dev, luma, 60, /* desired luma */ 6, /* dead zone */ 2, /* gain knee */ 70); /* expo knee */ sd->ag_cnt = AG_CNT_START; if (sd->bridge == BRIDGE_TP6810) { int new_expo = v4l2_ctrl_g_ctrl(gspca_dev->exposure); if ((expo >= 128 && new_expo < 128) || (expo < 128 && new_expo >= 128)) setframerate(gspca_dev, new_expo); } break; } } /* get stream parameters (framerate) */ static void sd_get_streamparm(struct gspca_dev *gspca_dev, struct v4l2_streamparm *parm) { struct sd *sd = (struct sd *) gspca_dev; struct v4l2_captureparm *cp = &parm->parm.capture; struct v4l2_fract *tpf = &cp->timeperframe; int fr, i; tpf->numerator = 1; i = get_fr_idx(gspca_dev); if (i & 0x80) { if (sd->bridge == BRIDGE_TP6800) fr = rates[6 - (i & 0x07)]; else fr = rates_6810[7 - (i & 0x07)]; } else { fr = rates[6 - i]; } tpf->denominator = fr; } /* set stream parameters (framerate) */ static void sd_set_streamparm(struct gspca_dev *gspca_dev, struct v4l2_streamparm *parm) { struct sd *sd = (struct sd *) gspca_dev; struct v4l2_captureparm *cp = &parm->parm.capture; struct v4l2_fract *tpf = &cp->timeperframe; int fr, i; if (tpf->numerator == 0 || tpf->denominator == 0) sd->framerate = DEFAULT_FRAME_RATE; else sd->framerate = tpf->denominator / tpf->numerator; if (gspca_dev->streaming) setframerate(gspca_dev, v4l2_ctrl_g_ctrl(gspca_dev->exposure)); /* Return the actual framerate */ i = get_fr_idx(gspca_dev); if (i & 0x80) fr = rates_6810[7 - (i & 0x07)]; else fr = rates[6 - i]; tpf->numerator = 1; tpf->denominator = fr; } static int sd_set_jcomp(struct gspca_dev *gspca_dev, const struct v4l2_jpegcompression *jcomp) { struct sd *sd = (struct sd *) gspca_dev; if (sd->sensor != SENSOR_SOI763A) return -ENOTTY; v4l2_ctrl_s_ctrl(sd->jpegqual, jcomp->quality); return 0; } static int sd_get_jcomp(struct gspca_dev *gspca_dev, struct v4l2_jpegcompression *jcomp) { struct sd *sd = (struct sd *) gspca_dev; if (sd->sensor != SENSOR_SOI763A) return -ENOTTY; memset(jcomp, 0, sizeof *jcomp); jcomp->quality = v4l2_ctrl_g_ctrl(sd->jpegqual); jcomp->jpeg_markers = V4L2_JPEG_MARKER_DHT | V4L2_JPEG_MARKER_DQT; return 0; } static int sd_s_ctrl(struct v4l2_ctrl *ctrl) { struct gspca_dev *gspca_dev = container_of(ctrl->handler, struct gspca_dev, ctrl_handler); struct sd *sd = (struct sd *)gspca_dev; gspca_dev->usb_err = 0; if (!gspca_dev->streaming) return 0; switch (ctrl->id) { case V4L2_CID_SHARPNESS: setsharpness(gspca_dev, ctrl->val); break; case V4L2_CID_GAMMA: setgamma(gspca_dev, ctrl->val); break; case V4L2_CID_BLUE_BALANCE: setbgain(gspca_dev, ctrl->val); break; case V4L2_CID_RED_BALANCE: setrgain(gspca_dev, ctrl->val); break; case V4L2_CID_EXPOSURE: sd_setgain(gspca_dev); break; case V4L2_CID_AUTOGAIN: if (ctrl->val) break; sd_setgain(gspca_dev); break; case V4L2_CID_JPEG_COMPRESSION_QUALITY: jpeg_set_qual(sd->jpeg_hdr, ctrl->val); break; } return gspca_dev->usb_err; } static const struct v4l2_ctrl_ops sd_ctrl_ops = { .s_ctrl = sd_s_ctrl, }; static int sd_init_controls(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *)gspca_dev; struct v4l2_ctrl_handler *hdl = &gspca_dev->ctrl_handler; gspca_dev->vdev.ctrl_handler = hdl; v4l2_ctrl_handler_init(hdl, 4); gspca_dev->exposure = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_EXPOSURE, 1, 0xdc, 1, 0x4e); if (sd->sensor == SENSOR_CX0342) { sd->red = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_RED_BALANCE, 0, 4095, 1, 256); sd->blue = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_BLUE_BALANCE, 0, 4095, 1, 256); } if (sd->sensor == SENSOR_SOI763A) gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_GAIN, 0, 15, 1, 3); else gspca_dev->gain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_GAIN, 0, 4095, 1, 256); sd->sharpness = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_SHARPNESS, 0, 3, 1, 2); sd->gamma = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_GAMMA, 0, NGAMMA - 1, 1, (sd->sensor == SENSOR_SOI763A && sd->bridge == BRIDGE_TP6800) ? 0 : 1); if (sd->bridge == BRIDGE_TP6810) gspca_dev->autogain = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_AUTOGAIN, 0, 1, 1, 1); if (sd->sensor == SENSOR_SOI763A) sd->jpegqual = v4l2_ctrl_new_std(hdl, &sd_ctrl_ops, V4L2_CID_JPEG_COMPRESSION_QUALITY, 0, 15, 1, (sd->bridge == BRIDGE_TP6810) ? 0 : 13); if (hdl->error) { pr_err("Could not initialize controls\n"); return hdl->error; } if (gspca_dev->autogain) v4l2_ctrl_auto_cluster(3, &gspca_dev->autogain, 0, false); else v4l2_ctrl_cluster(2, &gspca_dev->exposure); return 0; } static const struct sd_desc sd_desc = { .name = KBUILD_MODNAME, .config = sd_config, .init = sd_init, .init_controls = sd_init_controls, .isoc_init = sd_isoc_init, .start = sd_start, .stopN = sd_stopN, .pkt_scan = sd_pkt_scan, .dq_callback = sd_dq_callback, .get_streamparm = sd_get_streamparm, .set_streamparm = sd_set_streamparm, .get_jcomp = sd_get_jcomp, .set_jcomp = sd_set_jcomp, }; static const struct usb_device_id device_table[] = { {USB_DEVICE(0x06a2, 0x0003), .driver_info = BRIDGE_TP6800}, {USB_DEVICE(0x06a2, 0x6810), .driver_info = BRIDGE_TP6810}, {} /* Terminating entry */ }; MODULE_DEVICE_TABLE(usb, device_table); static int sd_probe(struct usb_interface *interface, const struct usb_device_id *id) { return gspca_dev_probe(interface, id, &sd_desc, sizeof(struct sd), THIS_MODULE); } static struct usb_driver sd_driver = { .name = KBUILD_MODNAME, .id_table = device_table, .probe = sd_probe, .disconnect = gspca_disconnect, #ifdef CONFIG_PM .suspend = gspca_suspend, .resume = gspca_resume, .reset_resume = gspca_resume, #endif }; module_usb_driver(sd_driver); module_param(force_sensor, int, 0644); MODULE_PARM_DESC(force_sensor, "Force sensor. 0: cx0342, 1: soi763a"); |
| 10 10 10 10 10 | 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 | // SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2012 Red Hat * * based in parts on udlfb.c: * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it> * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com> * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com> */ #include <linux/bitfield.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_damage_helper.h> #include <drm/drm_drv.h> #include <drm/drm_edid.h> #include <drm/drm_fourcc.h> #include <drm/drm_gem_atomic_helper.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_gem_shmem_helper.h> #include <drm/drm_modeset_helper_vtables.h> #include <drm/drm_probe_helper.h> #include <drm/drm_vblank.h> #include "udl_drv.h" #include "udl_edid.h" #include "udl_proto.h" /* * All DisplayLink bulk operations start with 0xaf (UDL_MSG_BULK), followed by * a specific command code. All operations are written to a command buffer, which * the driver sends to the device. */ static char *udl_set_register(char *buf, u8 reg, u8 val) { *buf++ = UDL_MSG_BULK; *buf++ = UDL_CMD_WRITEREG; *buf++ = reg; *buf++ = val; return buf; } static char *udl_vidreg_lock(char *buf) { return udl_set_register(buf, UDL_REG_VIDREG, UDL_VIDREG_LOCK); } static char *udl_vidreg_unlock(char *buf) { return udl_set_register(buf, UDL_REG_VIDREG, UDL_VIDREG_UNLOCK); } static char *udl_set_blank_mode(char *buf, u8 mode) { return udl_set_register(buf, UDL_REG_BLANKMODE, mode); } static char *udl_set_color_depth(char *buf, u8 selection) { return udl_set_register(buf, UDL_REG_COLORDEPTH, selection); } static char *udl_set_base16bpp(char *buf, u32 base) { /* the base pointer is 24 bits wide, 0x20 is hi byte. */ u8 reg20 = FIELD_GET(UDL_BASE_ADDR2_MASK, base); u8 reg21 = FIELD_GET(UDL_BASE_ADDR1_MASK, base); u8 reg22 = FIELD_GET(UDL_BASE_ADDR0_MASK, base); buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR2, reg20); buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR1, reg21); buf = udl_set_register(buf, UDL_REG_BASE16BPP_ADDR0, reg22); return buf; } /* * DisplayLink HW has separate 16bpp and 8bpp framebuffers. * In 24bpp modes, the low 323 RGB bits go in the 8bpp framebuffer */ static char *udl_set_base8bpp(char *buf, u32 base) { /* the base pointer is 24 bits wide, 0x26 is hi byte. */ u8 reg26 = FIELD_GET(UDL_BASE_ADDR2_MASK, base); u8 reg27 = FIELD_GET(UDL_BASE_ADDR1_MASK, base); u8 reg28 = FIELD_GET(UDL_BASE_ADDR0_MASK, base); buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR2, reg26); buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR1, reg27); buf = udl_set_register(buf, UDL_REG_BASE8BPP_ADDR0, reg28); return buf; } static char *udl_set_register_16(char *wrptr, u8 reg, u16 value) { wrptr = udl_set_register(wrptr, reg, value >> 8); return udl_set_register(wrptr, reg+1, value); } /* * This is kind of weird because the controller takes some * register values in a different byte order than other registers. */ static char *udl_set_register_16be(char *wrptr, u8 reg, u16 value) { wrptr = udl_set_register(wrptr, reg, value); return udl_set_register(wrptr, reg+1, value >> 8); } /* * LFSR is linear feedback shift register. The reason we have this is * because the display controller needs to minimize the clock depth of * various counters used in the display path. So this code reverses the * provided value into the lfsr16 value by counting backwards to get * the value that needs to be set in the hardware comparator to get the * same actual count. This makes sense once you read above a couple of * times and think about it from a hardware perspective. */ static u16 udl_lfsr16(u16 actual_count) { u32 lv = 0xFFFF; /* This is the lfsr value that the hw starts with */ while (actual_count--) { lv = ((lv << 1) | (((lv >> 15) ^ (lv >> 4) ^ (lv >> 2) ^ (lv >> 1)) & 1)) & 0xFFFF; } return (u16) lv; } /* * This does LFSR conversion on the value that is to be written. * See LFSR explanation above for more detail. */ static char *udl_set_register_lfsr16(char *wrptr, u8 reg, u16 value) { return udl_set_register_16(wrptr, reg, udl_lfsr16(value)); } /* * Takes a DRM display mode and converts it into the DisplayLink * equivalent register commands. */ static char *udl_set_display_mode(char *buf, struct drm_display_mode *mode) { u16 reg01 = mode->crtc_htotal - mode->crtc_hsync_start; u16 reg03 = reg01 + mode->crtc_hdisplay; u16 reg05 = mode->crtc_vtotal - mode->crtc_vsync_start; u16 reg07 = reg05 + mode->crtc_vdisplay; u16 reg09 = mode->crtc_htotal - 1; u16 reg0b = 1; /* libdlo hardcodes hsync start to 1 */ u16 reg0d = mode->crtc_hsync_end - mode->crtc_hsync_start + 1; u16 reg0f = mode->hdisplay; u16 reg11 = mode->crtc_vtotal; u16 reg13 = 0; /* libdlo hardcodes vsync start to 0 */ u16 reg15 = mode->crtc_vsync_end - mode->crtc_vsync_start; u16 reg17 = mode->crtc_vdisplay; u16 reg1b = mode->clock / 5; buf = udl_set_register_lfsr16(buf, UDL_REG_XDISPLAYSTART, reg01); buf = udl_set_register_lfsr16(buf, UDL_REG_XDISPLAYEND, reg03); buf = udl_set_register_lfsr16(buf, UDL_REG_YDISPLAYSTART, reg05); buf = udl_set_register_lfsr16(buf, UDL_REG_YDISPLAYEND, reg07); buf = udl_set_register_lfsr16(buf, UDL_REG_XENDCOUNT, reg09); buf = udl_set_register_lfsr16(buf, UDL_REG_HSYNCSTART, reg0b); buf = udl_set_register_lfsr16(buf, UDL_REG_HSYNCEND, reg0d); buf = udl_set_register_16(bu |