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 <stdint.h>
      15  
      16  #include "superblocks.h"
      17  
      18  struct isw_metadata {
      19  	uint8_t		sig[32];
      20  	uint32_t	check_sum;
      21  	uint32_t	mpb_size;
      22  	uint32_t	family_num;
      23  	uint32_t	generation_num;
      24  };
      25  
      26  #define ISW_SIGNATURE		"Intel Raid ISM Cfg Sig. "
      27  
      28  static int probe_iswraid(blkid_probe pr,
      29  		const struct blkid_idmag *mag __attribute__((__unused__)))
      30  {
      31  	uint64_t off;
      32  	unsigned int sector_size;
      33  	struct isw_metadata *isw;
      34  
      35  	if (pr->size < 0x10000)
      36  		return 1;
      37  	if (!S_ISREG(pr->mode) && !blkid_probe_is_wholedisk(pr))
      38  		return 1;
      39  
      40  	sector_size = blkid_probe_get_sectorsize(pr);
      41  	off = ((pr->size / sector_size) - 2) * sector_size;
      42  
      43  	isw = (struct isw_metadata *)blkid_probe_get_buffer(pr,
      44  			off, sizeof(struct isw_metadata));
      45  	if (!isw)
      46  		return errno ? -errno : 1;
      47  
      48  	if (memcmp(isw->sig, ISW_SIGNATURE, sizeof(ISW_SIGNATURE)-1) != 0)
      49  		return 1;
      50  
      51  	if (blkid_probe_sprintf_version(pr, "%6s",
      52  			&isw->sig[sizeof(ISW_SIGNATURE)-1]) != 0)
      53  		return 1;
      54  	if (blkid_probe_set_magic(pr, off, sizeof(isw->sig),
      55  				(unsigned char *) isw->sig))
      56  		return 1;
      57  	return 0;
      58  }
      59  
      60  const struct blkid_idinfo iswraid_idinfo = {
      61  	.name		= "isw_raid_member",
      62  	.usage		= BLKID_USAGE_RAID,
      63  	.probefunc	= probe_iswraid,
      64  	.magics		= BLKID_NONE_MAGIC
      65  };
      66  
      67