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_VIARAID
21 //config:### bool "via raid"
22 //config:### default y
23 //config:### depends on VOLUMEID
24
25 //kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_VIARAID) += via_raid.o
26
27 #include "volume_id_internal.h"
28
29 struct via_meta {
30 uint16_t signature;
31 uint8_t version_number;
32 struct via_array {
33 uint16_t disk_bits;
34 uint8_t disk_array_ex;
35 uint32_t capacity_low;
36 uint32_t capacity_high;
37 uint32_t serial_checksum;
38 } PACKED array;
39 uint32_t serial_checksum[8];
40 uint8_t checksum;
41 } PACKED;
42
43 #define VIA_SIGNATURE 0xAA55
44
volume_id_probe_via_raid(struct volume_id * id,uint64_t off,uint64_t size)45 int FAST_FUNC volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
46 {
47 uint64_t meta_off;
48 struct via_meta *via;
49
50 dbg("probing at offset 0x%llx, size 0x%llx",
51 (unsigned long long) off, (unsigned long long) size);
52
53 if (size < 0x10000)
54 return -1;
55
56 meta_off = ((size / 0x200)-1) * 0x200;
57
58 via = volume_id_get_buffer(id, off + meta_off, 0x200);
59 if (via == NULL)
60 return -1;
61
62 if (via->signature != cpu_to_le16(VIA_SIGNATURE))
63 return -1;
64
65 if (via->version_number > 1)
66 return -1;
67
68 // volume_id_set_usage(id, VOLUME_ID_RAID);
69 // id->type_version[0] = '0' + via->version_number;
70 // id->type_version[1] = '\0';
71 // id->type = "via_raid_member";
72
73 return 0;
74 }
75