source: branches/3.2/mindi-busybox/util-linux/volume_id/reiserfs.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 3.2 KB
Line 
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
24struct 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
40struct 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
51int 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    IF_FEATURE_BLKID_TYPE(id->type = "reiserfs";)
111
112    return 0;
113}
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