Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/linux_raid.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 2294 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
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 mdp_super_block { |
24 | uint32_t md_magic; |
25 | uint32_t major_version; |
26 | uint32_t minor_version; |
27 | uint32_t patch_version; |
28 | uint32_t gvalid_words; |
29 | uint32_t set_uuid0; |
30 | uint32_t ctime; |
31 | uint32_t level; |
32 | uint32_t size; |
33 | uint32_t nr_disks; |
34 | uint32_t raid_disks; |
35 | uint32_t md_minor; |
36 | uint32_t not_persistent; |
37 | uint32_t set_uuid1; |
38 | uint32_t set_uuid2; |
39 | uint32_t set_uuid3; |
40 | } PACKED; |
41 | |
42 | #define MD_RESERVED_BYTES 0x10000 |
43 | #define MD_MAGIC 0xa92b4efc |
44 | |
45 | int FAST_FUNC volume_id_probe_linux_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size) |
46 | { |
47 | #define off ((uint64_t)0) |
48 | uint64_t sboff; |
49 | uint8_t uuid[16]; |
50 | struct mdp_super_block *mdp; |
51 | |
52 | dbg("probing at offset 0x%llx, size 0x%llx", |
53 | (unsigned long long) off, (unsigned long long) size); |
54 | |
55 | if (size < 0x10000) |
56 | return -1; |
57 | |
58 | sboff = (size & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES; |
59 | mdp = volume_id_get_buffer(id, off + sboff, 0x800); |
60 | if (mdp == NULL) |
61 | return -1; |
62 | |
63 | if (mdp->md_magic != cpu_to_le32(MD_MAGIC)) |
64 | return -1; |
65 | |
66 | *(uint32_t*)uuid = mdp->set_uuid0; |
67 | memcpy(&uuid[4], &mdp->set_uuid1, 12); |
68 | volume_id_set_uuid(id, uuid, UUID_DCE); |
69 | |
70 | // snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u.%u", |
71 | // le32_to_cpu(mdp->major_version), |
72 | // le32_to_cpu(mdp->minor_version), |
73 | // le32_to_cpu(mdp->patch_version)); |
74 | |
75 | dbg("found raid signature"); |
76 | // volume_id_set_usage(id, VOLUME_ID_RAID); |
77 | // id->type = "linux_raid_member"; |
78 | |
79 | return 0; |
80 | } |