/*

 * Copyright (C) 2017 Red Hat, Inc.

 *

 * This file may be redistributed under the terms of the

 * GNU Lesser General Public License.

 */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include <errno.h>

#include <ctype.h>

#include <stdint.h>

#include "superblocks.h"

struct vdo_super_block {

  char magic[8];      /* magic number 'dmvdo001'*/

  char unused[32];    /* 32 bytes of unimportant space */

  unsigned char sb_uuid[16];  /* vdo unique id */

  /* this is not all... but enough for libblkid */

} __attribute__((packed));

static int probe_vdo(blkid_probe pr, const struct blkid_idmag *mag)

{

  const struct vdo_super_block *vsb;

  vsb = blkid_probe_get_sb(pr, mag, struct vdo_super_block);

  if (!vsb)

    return errno ? -errno : 1;

  blkid_probe_set_uuid(pr, vsb->sb_uuid);

  return 0;

}

const struct blkid_idinfo vdo_idinfo =

{

  .name   = "vdo",

  .usage    = BLKID_USAGE_OTHER,

  .probefunc  = probe_vdo,

  .magics   =

  {

    { .magic = "dmvdo001", .len = 8 },

    { NULL }

  }

};