libblkid-tiny/ubi.c

   1 /*
   2  * Copyright (C) 2017 Rafał Miłecki <rafal@milecki.pl>
   3  *
   4  * This file may be redistributed under the terms of the
   5  * GNU Lesser General Public License.
   6  */
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <string.h>
  11 #include <stdint.h>
  12
  13 #include "superblocks.h"
  14
  15 struct ubi_ec_hdr {
  16         uint32_t        magic;
  17         uint8_t         version;
  18         uint8_t         padding1[3];
  19         uint64_t        ec;
  20         uint32_t        vid_hdr_offset;
  21         uint32_t        data_offset;
  22         uint32_t        image_seq;
  23         uint8_t         padding2[32];
  24         uint32_t        hdr_crc;
  25 } __attribute__((packed));
  26
  27 static int probe_ubi(blkid_probe pr, const struct blkid_idmag *mag)
  28 {
  29         struct ubi_ec_hdr *hdr;
  30
  31         hdr = blkid_probe_get_sb(pr, mag, struct ubi_ec_hdr);
  32         if (!hdr)
  33                 return -1;
  34
  35         blkid_probe_sprintf_version(pr, "%u", hdr->version);
  36         blkid_probe_sprintf_uuid(pr, (unsigned char *)&hdr->image_seq, 4, "%u",
  37                                  be32_to_cpu(hdr->image_seq));
  38         return 0;
  39 }
  40
  41 const struct blkid_idinfo ubi_idinfo =
  42 {
  43         .name           = "ubi",
  44         .usage          = BLKID_USAGE_RAID,
  45         .probefunc      = probe_ubi,
  46         .magics         =
  47         {
  48                 { .magic = "UBI#", .len = 4 },
  49                 { NULL }
  50         }
  51 };