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

Last change on this file since 3232 was 3232, checked in by Bruno Cornec, 7 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 1.7 KB
Line 
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
23struct jfs_super_block {
24    uint8_t     magic[4];
25    uint32_t    version;
26    uint64_t    size;
27    uint32_t    bsize;
28    uint32_t    dummy1;
29    uint32_t    pbsize;
30    uint32_t    dummy2[27];
31    uint8_t     uuid[16];
32    uint8_t     label[16];
33    uint8_t     loguuid[16];
34} PACKED;
35
36#define JFS_SUPERBLOCK_OFFSET           0x8000
37
38int FAST_FUNC volume_id_probe_jfs(struct volume_id *id /*,uint64_t off*/)
39{
40#define off ((uint64_t)0)
41    struct jfs_super_block *js;
42
43    dbg("probing at offset 0x%llx", (unsigned long long) off);
44
45    js = volume_id_get_buffer(id, off + JFS_SUPERBLOCK_OFFSET, 0x200);
46    if (js == NULL)
47        return -1;
48
49    if (memcmp(js->magic, "JFS1", 4) != 0)
50        return -1;
51
52//  volume_id_set_label_raw(id, js->label, 16);
53    volume_id_set_label_string(id, js->label, 16);
54    volume_id_set_uuid(id, js->uuid, UUID_DCE);
55
56//  volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
57    IF_FEATURE_BLKID_TYPE(id->type = "jfs";)
58
59    return 0;
60}
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