shlibs/blkid/src/probers/promise_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 <errno.h>
  15 #include <ctype.h>
  16 #include <stdint.h>
  17
  18 #include "blkidP.h"
  19
  20 struct promise_metadata {
  21         uint8_t sig[24];
  22 };
  23
  24 #define PDC_CONFIG_OFF          0x1200
  25 #define PDC_SIGNATURE           "Promise Technology, Inc."
  26
  27 static int probe_pdcraid(blkid_probe pr, const struct blkid_idmag *mag)
  28 {
  29         unsigned int i;
  30         static unsigned int sectors[] = {
  31                 63, 255, 256, 16, 399, 0
  32         };
  33
  34         if (pr->size < 0x40000)
  35                 return -1;
  36
  37         for (i = 0; sectors[i] != 0; i++) {
  38                 uint64_t off;
  39                 struct promise_metadata *pdc;
  40
  41                 off = ((pr->size / 0x200) - sectors[i]) * 0x200;
  42                 pdc = (struct promise_metadata *)
  43                                 blkid_probe_get_buffer(pr,
  44                                         off,
  45                                         sizeof(struct promise_metadata));
  46                 if (!pdc)
  47                         return -1;
  48
  49                 if (memcmp(pdc->sig, PDC_SIGNATURE,
  50                                 sizeof(PDC_SIGNATURE) - 1) == 0)
  51                         return 0;
  52         }
  53         return -1;
  54 }
  55
  56 const struct blkid_idinfo pdcraid_idinfo = {
  57         .name           = "promise_fasttrack_raid_member",
  58         .usage          = BLKID_USAGE_RAID,
  59         .probefunc      = probe_pdcraid,
  60         .magics         = BLKID_NONE_MAGIC
  61 };
  62
  63