1 /*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20 //config:### config FEATURE_VOLUMEID_LSIRAID
21 //config:### bool "lsi raid"
22 //config:### default y
23 //config:### depends on VOLUMEID
24
25 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_LSIRAID) += lsi_raid.o
26
27 #include "volume_id_internal.h"
28
29 struct lsi_meta {
30 uint8_t sig[6];
31 } PACKED;
32
33 #define LSI_SIGNATURE "$XIDE$"
34
volume_id_probe_lsi_mega_raid(struct volume_id * id,uint64_t off,uint64_t size)35 int FAST_FUNC volume_id_probe_lsi_mega_raid(struct volume_id *id, uint64_t off, uint64_t size)
36 {
37 uint64_t meta_off;
38 struct lsi_meta *lsi;
39
40 dbg("probing at offset 0x%llx, size 0x%llx",
41 (unsigned long long) off, (unsigned long long) size);
42
43 if (size < 0x10000)
44 return -1;
45
46 meta_off = ((size / 0x200)-1) * 0x200;
47 lsi = volume_id_get_buffer(id, off + meta_off, 0x200);
48 if (lsi == NULL)
49 return -1;
50
51 if (memcmp(lsi->sig, LSI_SIGNATURE, sizeof(LSI_SIGNATURE)-1) != 0)
52 return -1;
53
54 // volume_id_set_usage(id, VOLUME_ID_RAID);
55 // id->type = "lsi_mega_raid_member";
56
57 return 0;
58 }
59