1 | /*
|
---|
2 | * volume_id - reads filesystem label and uuid
|
---|
3 | *
|
---|
4 | * Copyright (C) 2004 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 |
|
---|
21 | #include "volume_id_internal.h"
|
---|
22 |
|
---|
23 | struct lvm1_super_block {
|
---|
24 | uint8_t id[2];
|
---|
25 | } PACKED;
|
---|
26 |
|
---|
27 | struct lvm2_super_block {
|
---|
28 | uint8_t id[8];
|
---|
29 | uint64_t sector_xl;
|
---|
30 | uint32_t crc_xl;
|
---|
31 | uint32_t offset_xl;
|
---|
32 | uint8_t type[8];
|
---|
33 | } PACKED;
|
---|
34 |
|
---|
35 | #define LVM1_SB_OFF 0x400
|
---|
36 |
|
---|
37 | int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id, uint64_t off)
|
---|
38 | {
|
---|
39 | struct lvm1_super_block *lvm;
|
---|
40 |
|
---|
41 | dbg("probing at offset 0x%llx", (unsigned long long) off);
|
---|
42 |
|
---|
43 | lvm = volume_id_get_buffer(id, off + LVM1_SB_OFF, 0x800);
|
---|
44 | if (lvm == NULL)
|
---|
45 | return -1;
|
---|
46 |
|
---|
47 | if (lvm->id[0] != 'H' || lvm->id[1] != 'M')
|
---|
48 | return -1;
|
---|
49 |
|
---|
50 | // volume_id_set_usage(id, VOLUME_ID_RAID);
|
---|
51 | // id->type = "LVM1_member";
|
---|
52 |
|
---|
53 | return 0;
|
---|
54 | }
|
---|
55 |
|
---|
56 | #define LVM2_LABEL_ID "LABELONE"
|
---|
57 | #define LVM2LABEL_SCAN_SECTORS 4
|
---|
58 |
|
---|
59 | int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id, uint64_t off)
|
---|
60 | {
|
---|
61 | const uint8_t *buf;
|
---|
62 | unsigned soff;
|
---|
63 | struct lvm2_super_block *lvm;
|
---|
64 |
|
---|
65 | dbg("probing at offset 0x%llx", (unsigned long long) off);
|
---|
66 |
|
---|
67 | buf = volume_id_get_buffer(id, off, LVM2LABEL_SCAN_SECTORS * 0x200);
|
---|
68 | if (buf == NULL)
|
---|
69 | return -1;
|
---|
70 |
|
---|
71 |
|
---|
72 | for (soff = 0; soff < LVM2LABEL_SCAN_SECTORS * 0x200; soff += 0x200) {
|
---|
73 | lvm = (struct lvm2_super_block *) &buf[soff];
|
---|
74 |
|
---|
75 | if (memcmp(lvm->id, LVM2_LABEL_ID, 8) == 0)
|
---|
76 | goto found;
|
---|
77 | }
|
---|
78 |
|
---|
79 | return -1;
|
---|
80 |
|
---|
81 | found:
|
---|
82 | // memcpy(id->type_version, lvm->type, 8);
|
---|
83 | // volume_id_set_usage(id, VOLUME_ID_RAID);
|
---|
84 | // id->type = "LVM2_member";
|
---|
85 |
|
---|
86 | return 0;
|
---|
87 | }
|
---|