shlibs/blkid/src/probers/isw_raid.c

   1 /*
   2  * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
   3  *
   4  * Inspired by libvolume_id by
   5  *     Kay Sievers <kay.sievers@vrfy.org>
   6  *
   7  * This file may be redistributed under the terms of the
   8  * GNU Lesser General Public License.
   9  */
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <string.h>
  14 #include <stdint.h>
  15
  16 #include "blkidP.h"
  17
  18 struct isw_metadata {
  19         uint8_t         sig[32];
  20         uint32_t        check_sum;
  21         uint32_t        mpb_size;
  22         uint32_t        family_num;
  23         uint32_t        generation_num;
  24 };
  25
  26 #define ISW_SIGNATURE           "Intel Raid ISM Cfg Sig. "
  27
  28
  29 static int probe_iswraid(blkid_probe pr, const struct blkid_idmag *mag)
  30 {
  31         uint64_t off;
  32         struct isw_metadata *isw;
  33
  34         if (pr->size < 0x10000)
  35                 return -1;
  36
  37         off = ((pr->size / 0x200) - 2) * 0x200;
  38         isw = (struct isw_metadata *)
  39                         blkid_probe_get_buffer(pr,
  40                                         off,
  41                                         sizeof(struct isw_metadata));
  42         if (!isw)
  43                 return -1;
  44         if (memcmp(isw->sig, ISW_SIGNATURE, sizeof(ISW_SIGNATURE)-1) != 0)
  45                 return -1;
  46         if (blkid_probe_sprintf_version(pr, "%6s",
  47                         &isw->sig[sizeof(ISW_SIGNATURE)-1]) != 0)
  48                 return -1;
  49
  50         return 0;
  51 }
  52
  53 const struct blkid_idinfo iswraid_idinfo = {
  54         .name           = "isw_raid_member",
  55         .usage          = BLKID_USAGE_RAID,
  56         .probefunc      = probe_iswraid,
  57         .magics         = BLKID_NONE_MAGIC
  58 };
  59
  60