shlibs/blkid/src/probers/silicon_raid.c

   1 /*
   2  * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
   3  * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
   4  *
   5  * Inspired by libvolume_id by
   6  *     Kay Sievers <kay.sievers@vrfy.org>
   7  *
   8  * This file may be redistributed under the terms of the
   9  * GNU Lesser General Public License.
  10  */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14 #include <string.h>
  15 #include <errno.h>
  16 #include <ctype.h>
  17 #include <stdint.h>
  18
  19 #include "blkidP.h"
  20
  21 struct silicon_metadata {
  22         uint8_t         unknown0[0x2E];
  23         uint8_t         ascii_version[0x36 - 0x2E];
  24         uint8_t         diskname[0x56 - 0x36];
  25         uint8_t         unknown1[0x60 - 0x56];
  26         uint32_t        magic;
  27         uint32_t        unknown1a[0x6C - 0x64];
  28         uint32_t        array_sectors_low;
  29         uint32_t        array_sectors_high;
  30         uint8_t         unknown2[0x78 - 0x74];
  31         uint32_t        thisdisk_sectors;
  32         uint8_t         unknown3[0x100 - 0x7C];
  33         uint8_t         unknown4[0x104 - 0x100];
  34         uint16_t        product_id;
  35         uint16_t        vendor_id;
  36         uint16_t        minor_ver;
  37         uint16_t        major_ver;
  38 } __attribute__((packed));
  39
  40 #define SILICON_MAGIC           0x2F000000
  41
  42
  43 static int probe_silraid(blkid_probe pr, const struct blkid_idmag *mag)
  44 {
  45         uint64_t off;
  46         struct silicon_metadata *sil;
  47
  48         if (pr->size < 0x10000)
  49                 return -1;
  50
  51         off = ((pr->size / 0x200) - 1) * 0x200;
  52
  53         sil = (struct silicon_metadata *)
  54                         blkid_probe_get_buffer(pr, off,
  55                                 sizeof(struct silicon_metadata));
  56         if (!sil)
  57                 return -1;
  58
  59         if (le32_to_cpu(sil->magic) != SILICON_MAGIC)
  60                 return -1;
  61
  62         if (blkid_probe_sprintf_version(pr, "%u.%u",
  63                                 le16_to_cpu(sil->major_ver),
  64                                 le16_to_cpu(sil->minor_ver)) != 0)
  65                 return -1;
  66
  67         return 0;
  68 }
  69
  70 const struct blkid_idinfo silraid_idinfo = {
  71         .name           = "silicon_medley_raid_member",
  72         .usage          = BLKID_USAGE_RAID,
  73         .probefunc      = probe_silraid,
  74         .magics         = BLKID_NONE_MAGIC
  75 };
  76
  77