/*

 * Copyright (C) 2008 Karel Zak <kzak@redhat.com>

 *

 * Inspired by libvolume_id by

 *     Kay Sievers <kay.sievers@vrfy.org>

 *

 * This file may be redistributed under the terms of the

 * GNU Lesser General Public License.

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include <errno.h>

#include <ctype.h>

#include <stdint.h>

#include "superblocks.h"

struct promise_metadata {

  uint8_t sig[24];

};

#define PDC_CONFIG_OFF    0x1200

#define PDC_SIGNATURE   "Promise Technology, Inc."

static int probe_pdcraid(blkid_probe pr,

    const struct blkid_idmag *mag __attribute__((__unused__)))

{

  size_t i;

  static unsigned int sectors[] = {

    63, 255, 256, 16, 399, 591, 675, 735, 911, 974, 991, 951, 3087

  };

  uint64_t nsectors;

  if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))

    return 1;

  nsectors = pr->size >> 9;

  for (i = 0; i < ARRAY_SIZE(sectors); i++) {

    uint64_t off;

    struct promise_metadata *pdc;

    if (nsectors < sectors[i])

      return 1;

    off = (nsectors - sectors[i]) << 9;

    pdc = (struct promise_metadata *)

        blkid_probe_get_buffer(pr,

          off,

          sizeof(struct promise_metadata));

    if (!pdc)

      return errno ? -errno : 1;

    if (memcmp(pdc->sig, PDC_SIGNATURE,

        sizeof(PDC_SIGNATURE) - 1) == 0) {

      if (blkid_probe_set_magic(pr, off, sizeof(pdc->sig),

            (unsigned char *) pdc->sig))

        return 1;

      return 0;

    }

  }

  return 1;

}

const struct blkid_idinfo pdcraid_idinfo = {

  .name   = "promise_fasttrack_raid_member",

  .usage    = BLKID_USAGE_RAID,

  .minsz    = 0x40000,

  .probefunc  = probe_pdcraid,

  .magics   = BLKID_NONE_MAGIC

};