2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2007 Kay Sievers <kay.sievers@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
27 #include "libvolume_id.h"
30 /* http://www.snia.org/standards/home */
32 #define DDF_HEADER 0xDE11DE11
33 #define DDF_GUID_LENGTH 24
34 #define DDF_REV_LENGTH 8
36 static struct ddf_header {
39 uint8_t guid[DDF_GUID_LENGTH];
40 uint8_t ddf_rev[DDF_REV_LENGTH];
43 int volume_id_probe_ddf_raid(struct volume_id *id, uint64_t off, uint64_t size)
45 uint64_t ddf_off = ((size / 0x200)-1) * 0x200;
48 info("probing at offset 0x%llx, size 0x%llx\n",
49 (unsigned long long) off, (unsigned long long) size);
53 buf = volume_id_get_buffer(id, off + ddf_off, 0x200);
56 ddf = (struct ddf_header *) buf;
58 if (ddf->signature != cpu_to_be32(DDF_HEADER))
61 volume_id_set_uuid(id, ddf->guid, DDF_GUID_LENGTH, UUID_STRING);
62 snprintf(id->type_version, DDF_REV_LENGTH, "%s", ddf->ddf_rev);
63 volume_id_set_usage(id, VOLUME_ID_RAID);
64 id->type = "ddf_raid_member";