Tomato 1.28
[tomato.git] / release / src / router / busybox / util-linux / volume_id / ext.c
blobb052e04ce45ff37568b5a0f7ba8c467252b8d68d
1 /*
2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
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.
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.
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
21 #include "volume_id_internal.h"
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 } __attribute__((__packed__));
42 #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x00000004
43 #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x00000008
44 #define EXT_SUPERBLOCK_OFFSET 0x400
46 int volume_id_probe_ext(struct volume_id *id /*,uint64_t off*/)
48 #define off ((uint64_t)0)
49 struct ext2_super_block *es;
51 dbg("ext: probing at offset 0x%llx", (unsigned long long) off);
53 es = volume_id_get_buffer(id, off + EXT_SUPERBLOCK_OFFSET, 0x200);
54 if (es == NULL)
55 return -1;
57 if (es->magic[0] != 0123 || es->magic[1] != 0357) {
58 dbg("ext: no magic found");
59 return -1;
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);
68 // if ((le32_to_cpu(es->feature_compat) & EXT3_FEATURE_COMPAT_HAS_JOURNAL) != 0)
69 // id->type = "ext3";
70 // else
71 // id->type = "ext2";
73 return 0;