1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation version 2 of the License.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "libvolume_id.h"
#include "util.h"
struct jfs_super_block {
uint8_t magic[4];
uint32_t version;
uint64_t size;
uint32_t bsize;
uint32_t dummy1;
uint32_t pbsize;
uint32_t dummy2[27];
uint8_t uuid[16];
uint8_t label[16];
uint8_t loguuid[16];
} PACKED;
#define JFS_SUPERBLOCK_OFFSET 0x8000
int volume_id_probe_jfs(struct volume_id *id, uint64_t off)
{
struct jfs_super_block *js;
dbg("probing at offset 0x%llx", (unsigned long long) off);
js = (struct jfs_super_block *) volume_id_get_buffer(id, off + JFS_SUPERBLOCK_OFFSET, 0x200);
if (js == NULL)
return -1;
if (memcmp(js->magic, "JFS1", 4) != 0)
return -1;
volume_id_set_label_raw(id, js->label, 16);
volume_id_set_label_string(id, js->label, 16);
volume_id_set_uuid(id, js->uuid, UUID_DCE);
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
id->type = "jfs";
return 0;
}
|
