libblkid/src/superblocks/nvidia_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 <stdint.h>
  16
  17 #include "superblocks.h"
  18
  19 struct nv_metadata {
  20         uint8_t         vendor[8];
  21         uint32_t        size;
  22         uint32_t        chksum;
  23         uint16_t        version;
  24 } __attribute__((packed));
  25
  26 #define NVIDIA_SIGNATURE                "NVIDIA"
  27
  28 static int probe_nvraid(blkid_probe pr,
  29                 const struct blkid_idmag *mag __attribute__((__unused__)))
  30 {
  31         uint64_t off;
  32         struct nv_metadata *nv;
  33
  34         if (pr->size < 0x10000)
  35                 return -1;
  36         if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
  37                 return -1;
  38
  39         off = ((pr->size / 0x200) - 2) * 0x200;
  40         nv = (struct nv_metadata *)
  41                 blkid_probe_get_buffer(pr,
  42                                 off,
  43                                 sizeof(struct nv_metadata));
  44         if (!nv)
  45                 return -1;
  46
  47         if (memcmp(nv->vendor, NVIDIA_SIGNATURE, sizeof(NVIDIA_SIGNATURE)-1) != 0)
  48                 return -1;
  49         if (blkid_probe_sprintf_version(pr, "%u", le16_to_cpu(nv->version)) != 0)
  50                 return -1;
  51         if (blkid_probe_set_magic(pr, off, sizeof(nv->vendor),
  52                                 (unsigned char *) nv->vendor))
  53                 return -1;
  54         return 0;
  55 }
  56
  57 const struct blkid_idinfo nvraid_idinfo = {
  58         .name           = "nvidia_raid_member",
  59         .usage          = BLKID_USAGE_RAID,
  60         .probefunc      = probe_nvraid,
  61         .magics         = BLKID_NONE_MAGIC
  62 };
  63
  64