1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//config:config FEATURE_VOLUMEID_LINUXRAID
//config: bool "linuxraid"
//config: default y
//config: depends on VOLUMEID
//kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_LINUXRAID) += linux_raid.o
#include "volume_id_internal.h"
struct mdp_super_block {
uint32_t md_magic;
uint32_t major_version;
uint32_t minor_version;
uint32_t patch_version;
uint32_t gvalid_words;
uint32_t set_uuid0;
uint32_t ctime;
uint32_t level;
uint32_t size;
uint32_t nr_disks;
uint32_t raid_disks;
uint32_t md_minor;
uint32_t not_persistent;
uint32_t set_uuid1;
uint32_t set_uuid2;
uint32_t set_uuid3;
} PACKED;
#define MD_RESERVED_BYTES 0x10000
#define MD_MAGIC 0xa92b4efc
int FAST_FUNC volume_id_probe_linux_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size)
{
typedef uint32_t aliased_uint32_t FIX_ALIASING;
#define off ((uint64_t)0)
uint64_t sboff;
uint8_t uuid[16];
struct mdp_super_block *mdp;
dbg("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
if (size < 0x10000)
return -1;
sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES;
mdp = volume_id_get_buffer(id, off + sboff, 0x800);
if (mdp == NULL)
return -1;
if (mdp->md_magic != cpu_to_le32(MD_MAGIC))
return -1;
*(aliased_uint32_t*)uuid = mdp->set_uuid0;
memcpy(&uuid[4], &mdp->set_uuid1, 12);
volume_id_set_uuid(id, uuid, UUID_DCE);
// snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u",
// le32_to_cpu(mdp->major_version),
// le32_to_cpu(mdp->minor_version),
// le32_to_cpu(mdp->patch_version));
dbg("found raid signature");
// volume_id_set_usage(id, VOLUME_ID_RAID);
IF_FEATURE_BLKID_TYPE(id->type = "linux_raid_member";)
return 0;
}
|
