Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/reiserfs.c
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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: 3242 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 | * Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch> |
6 | * |
7 | * This library is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * This library is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with this library; if not, write to the Free Software |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
20 | */ |
21 | |
22 | #include "volume_id_internal.h" |
23 | |
24 | struct reiserfs_super_block { |
25 | uint32_t blocks_count; |
26 | uint32_t free_blocks; |
27 | uint32_t root_block; |
28 | uint32_t journal_block; |
29 | uint32_t journal_dev; |
30 | uint32_t orig_journal_size; |
31 | uint32_t dummy2[5]; |
32 | uint16_t blocksize; |
33 | uint16_t dummy3[3]; |
34 | uint8_t magic[12]; |
35 | uint32_t dummy4[5]; |
36 | uint8_t uuid[16]; |
37 | uint8_t label[16]; |
38 | } PACKED; |
39 | |
40 | struct reiser4_super_block { |
41 | uint8_t magic[16]; |
42 | uint16_t dummy[2]; |
43 | uint8_t uuid[16]; |
44 | uint8_t label[16]; |
45 | uint64_t dummy2; |
46 | } PACKED; |
47 | |
48 | #define REISERFS1_SUPERBLOCK_OFFSET 0x2000 |
49 | #define REISERFS_SUPERBLOCK_OFFSET 0x10000 |
50 | |
51 | int FAST_FUNC volume_id_probe_reiserfs(struct volume_id *id /*,uint64_t off*/) |
52 | { |
53 | #define off ((uint64_t)0) |
54 | struct reiserfs_super_block *rs; |
55 | struct reiser4_super_block *rs4; |
56 | |
57 | dbg("reiserfs: probing at offset 0x%llx", (unsigned long long) off); |
58 | |
59 | rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200); |
60 | if (rs == NULL) |
61 | return -1; |
62 | |
63 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) { |
64 | dbg("reiserfs: ReIsErFs, no label"); |
65 | // strcpy(id->type_version, "3.5"); |
66 | goto found; |
67 | } |
68 | if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) { |
69 | dbg("reiserfs: ReIsEr2Fs"); |
70 | // strcpy(id->type_version, "3.6"); |
71 | goto found_label; |
72 | } |
73 | if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) { |
74 | dbg("reiserfs: ReIsEr3Fs"); |
75 | // strcpy(id->type_version, "JR"); |
76 | goto found_label; |
77 | } |
78 | |
79 | rs4 = (struct reiser4_super_block *) rs; |
80 | if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) { |
81 | // strcpy(id->type_version, "4"); |
82 | // volume_id_set_label_raw(id, rs4->label, 16); |
83 | volume_id_set_label_string(id, rs4->label, 16); |
84 | volume_id_set_uuid(id, rs4->uuid, UUID_DCE); |
85 | dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid); |
86 | goto found; |
87 | } |
88 | |
89 | rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200); |
90 | if (rs == NULL) |
91 | return -1; |
92 | |
93 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) { |
94 | dbg("reiserfs: ReIsErFs, no label"); |
95 | // strcpy(id->type_version, "3.5"); |
96 | goto found; |
97 | } |
98 | |
99 | dbg("reiserfs: no signature found"); |
100 | return -1; |
101 | |
102 | found_label: |
103 | // volume_id_set_label_raw(id, rs->label, 16); |
104 | volume_id_set_label_string(id, rs->label, 16); |
105 | volume_id_set_uuid(id, rs->uuid, UUID_DCE); |
106 | dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid); |
107 | |
108 | found: |
109 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); |
110 | // id->type = "reiserfs"; |
111 | |
112 | return 0; |
113 | } |