Contents of /trunk/mkinitrd-magellan/busybox/util-linux/volume_id/ext.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: 2263 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 ext2_super_block { |
24 | uint32_t inodes_count; |
25 | uint32_t blocks_count; |
26 | uint32_t r_blocks_count; |
27 | uint32_t free_blocks_count; |
28 | uint32_t free_inodes_count; |
29 | uint32_t first_data_block; |
30 | uint32_t log_block_size; |
31 | uint32_t dummy3[7]; |
32 | uint8_t magic[2]; |
33 | uint16_t state; |
34 | uint32_t dummy5[8]; |
35 | uint32_t feature_compat; |
36 | uint32_t feature_incompat; |
37 | uint32_t feature_ro_compat; |
38 | uint8_t uuid[16]; |
39 | uint8_t volume_name[16]; |
40 | } PACKED; |
41 | |
42 | #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x00000004 |
43 | #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x00000008 |
44 | #define EXT_SUPERBLOCK_OFFSET 0x400 |
45 | |
46 | int FAST_FUNC volume_id_probe_ext(struct volume_id *id /*,uint64_t off*/) |
47 | { |
48 | #define off ((uint64_t)0) |
49 | struct ext2_super_block *es; |
50 | |
51 | dbg("ext: probing at offset 0x%llx", (unsigned long long) off); |
52 | |
53 | es = volume_id_get_buffer(id, off + EXT_SUPERBLOCK_OFFSET, 0x200); |
54 | if (es == NULL) |
55 | return -1; |
56 | |
57 | if (es->magic[0] != 0123 || es->magic[1] != 0357) { |
58 | dbg("ext: no magic found"); |
59 | return -1; |
60 | } |
61 | |
62 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); |
63 | // volume_id_set_label_raw(id, es->volume_name, 16); |
64 | volume_id_set_label_string(id, es->volume_name, 16); |
65 | volume_id_set_uuid(id, es->uuid, UUID_DCE); |
66 | dbg("ext: label '%s' uuid '%s'", id->label, id->uuid); |
67 | |
68 | // if ((le32_to_cpu(es->feature_compat) & EXT3_FEATURE_COMPAT_HAS_JOURNAL) != 0) |
69 | // id->type = "ext3"; |
70 | // else |
71 | // id->type = "ext2"; |
72 | |
73 | return 0; |
74 | } |