1  /*
       2   * Copyright (C) 2018 by Kenneth Van Alstyne <kvanals@kvanals.org>
       3   *
       4   * This file may be redistributed under the terms of the
       5   * GNU Lesser General Public License.
       6   *
       7   *
       8   * Ceph BlueStore is one of the supported storage
       9   * methods for Object Storage Devices (OSDs).
      10   * This is used to detect the backing block devices
      11   * used for these types of OSDs in a Ceph Cluster.
      12   *
      13   */
      14  #include <stdio.h>
      15  #include <stdlib.h>
      16  #include <unistd.h>
      17  #include <string.h>
      18  #include <errno.h>
      19  #include <ctype.h>
      20  #include <inttypes.h>
      21  #include <stddef.h>
      22  
      23  #include "bitops.h"
      24  #include "superblocks.h"
      25  
      26  #define BLUESTORE_MAGIC_L		22
      27  
      28  struct bluestore_phdr {
      29  	uint8_t		magic[BLUESTORE_MAGIC_L];
      30  } __attribute__((packed));
      31  
      32  static int probe_bluestore(blkid_probe pr, const struct blkid_idmag *mag)
      33  {
      34  	struct bluestore_phdr *header;
      35  
      36  	header = blkid_probe_get_sb(pr, mag, struct bluestore_phdr);
      37  	if (header == NULL)
      38  		return errno ? -errno : 1;
      39  
      40  	return 0;
      41  }
      42  
      43  const struct blkid_idinfo bluestore_idinfo =
      44  {
      45  	.name		= "ceph_bluestore",
      46  	.usage		= BLKID_USAGE_OTHER,
      47  	.probefunc	= probe_bluestore,
      48  	.magics		=
      49  	{
      50  		{ .magic = "bluestore block device", .len = 22 },
      51  		{ NULL }
      52  	}
      53  };