libblkid/src/superblocks/highpoint_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 "superblocks.h"
  17
  18 struct hpt45x_metadata {
  19         uint32_t        magic;
  20 };
  21
  22 #define HPT45X_MAGIC_OK                 0x5a7816f3
  23 #define HPT45X_MAGIC_BAD                0x5a7816fd
  24
  25 static int probe_highpoint45x(blkid_probe pr,
  26                 const struct blkid_idmag *mag __attribute__((__unused__)))
  27 {
  28         struct hpt45x_metadata *hpt;
  29         uint64_t off;
  30         uint32_t magic;
  31
  32         if (pr->size < 0x10000)
  33                 return 1;
  34         if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
  35                 return 1;
  36
  37         off = ((pr->size / 0x200) - 11) * 0x200;
  38         hpt = (struct hpt45x_metadata *)
  39                         blkid_probe_get_buffer(pr,
  40                                         off,
  41                                         sizeof(struct hpt45x_metadata));
  42         if (!hpt)
  43                 return errno ? -errno : 1;
  44         magic = le32_to_cpu(hpt->magic);
  45         if (magic != HPT45X_MAGIC_OK && magic != HPT45X_MAGIC_BAD)
  46                 return 1;
  47         if (blkid_probe_set_magic(pr, off, sizeof(hpt->magic),
  48                                 (unsigned char *) &hpt->magic))
  49                 return 1;
  50         return 0;
  51 }
  52
  53 static int probe_highpoint37x(blkid_probe pr,
  54                 const struct blkid_idmag *mag __attribute__((__unused__)))
  55 {
  56         if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
  57                 return 1;
  58         return 0;
  59 }
  60
  61
  62 const struct blkid_idinfo highpoint45x_idinfo = {
  63         .name           = "hpt45x_raid_member",
  64         .usage          = BLKID_USAGE_RAID,
  65         .probefunc      = probe_highpoint45x,
  66         .magics         = BLKID_NONE_MAGIC
  67 };
  68
  69 const struct blkid_idinfo highpoint37x_idinfo = {
  70         .name           = "hpt37x_raid_member",
  71         .usage          = BLKID_USAGE_RAID,
  72         .probefunc      = probe_highpoint37x,
  73         .magics         = {
  74                 /*
  75                  * Superblock offset:                     4608 bytes  (9 sectors)
  76                  * Magic string offset within superblock:   32 bytes
  77                  *
  78                  * kboff = (4608 + 32) / 1024
  79                  * sboff = (4608 + 32) % kboff
  80                  */
  81                 { .magic = "\xf0\x16\x78\x5a", .len = 4, .kboff = 4, .sboff = 544 },
  82                 { .magic = "\xfd\x16\x78\x5a", .len = 4, .kboff = 4, .sboff = 544 },
  83                 { NULL }
  84         }
  85 };
  86
  87