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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* volume_id - reads volume label and uuid
*
* Copyright (C) 2005 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 <fcntl.h>
#include <sys/stat.h>
#include "libvolume_id.h"
#include "util.h"
/* the user can overwrite this log function */
static void default_log(int priority, const char *file, int line, const char *format, ...)
{
return;
}
volume_id_log_fn_t volume_id_log_fn = default_log;
int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
if (id == NULL)
return -EINVAL;
info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
/* probe for raid first, because fs probes may be successful on raid members */
if (size) {
if (volume_id_probe_linux_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_intel_software_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_lsi_mega_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_via_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_silicon_medley_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_nvidia_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_promise_fasttrack_raid(id, off, size) == 0)
goto found;
if (volume_id_probe_highpoint_45x_raid(id, off, size) == 0)
goto found;
}
if (volume_id_probe_lvm1(id, off) == 0)
goto found;
if (volume_id_probe_lvm2(id, off) == 0)
goto found;
if (volume_id_probe_highpoint_37x_raid(id, off) == 0)
goto found;
return -1;
found:
/* If recognized, we free the allocated buffers */
volume_id_free_buffer(id);
return 0;
}
int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size)
{
if (id == NULL)
return -EINVAL;
info("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
if (volume_id_probe_luks(id, off) == 0)
goto found;
/* signature in the first block, only small buffer needed */
if (volume_id_probe_vfat(id, off) == 0)
goto found;
if (volume_id_probe_xfs(id, off) == 0)
goto found;
/* fill buffer with maximum */
volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
if (volume_id_probe_linux_swap(id, off) == 0)
goto found;
if (volume_id_probe_ext(id, off) == 0)
goto found;
if (volume_id_probe_reiserfs(id, off) == 0)
goto found;
if (volume_id_probe_jfs(id, off) == 0)
goto found;
if (volume_id_probe_udf(id, off) == 0)
goto found;
if (volume_id_probe_iso9660(id, off) == 0)
goto found;
if (volume_id_probe_hfs_hfsplus(id, off) == 0)
goto found;
if (volume_id_probe_ufs(id, off) == 0)
goto found;
if (volume_id_probe_ntfs(id, off) == 0)
goto found;
if (volume_id_probe_cramfs(id, off) == 0)
goto found;
if (volume_id_probe_romfs(id, off) == 0)
goto found;
if (volume_id_probe_hpfs(id, off) == 0)
goto found;
if (volume_id_probe_sysv(id, off) == 0)
goto found;
if (volume_id_probe_minix(id, off) == 0)
goto found;
if (volume_id_probe_ocfs1(id, off) == 0)
goto found;
if (volume_id_probe_ocfs2(id, off) == 0)
goto found;
if (volume_id_probe_vxfs(id, off) == 0)
goto found;
if (volume_id_probe_squashfs(id, off) == 0)
goto found;
return -1;
found:
/* If recognized, we free the allocated buffers */
volume_id_free_buffer(id);
return 0;
}
int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
{
if (id == NULL)
return -EINVAL;
if (volume_id_probe_raid(id, off, size) == 0)
return 0;
if (volume_id_probe_filesystem(id, off, size) == 0)
return 0;
return -1;
}
/* open volume by already open file descriptor */
struct volume_id *volume_id_open_fd(int fd)
{
struct volume_id *id;
id = malloc(sizeof(struct volume_id));
if (id == NULL)
return NULL;
memset(id, 0x00, sizeof(struct volume_id));
id->fd = fd;
return id;
}
/* open volume by device node */
struct volume_id *volume_id_open_node(const char *path)
{
struct volume_id *id;
int fd;
fd = open(path, O_RDONLY);
if (fd < 0) {
dbg("unable to open '%s'", path);
return NULL;
}
id = volume_id_open_fd(fd);
if (id == NULL)
return NULL;
/* close fd on device close */
id->fd_close = 1;
return id;
}
void volume_id_close(struct volume_id *id)
{
if (id == NULL)
return;
if (id->fd_close != 0)
close(id->fd);
volume_id_free_buffer(id);
free(id);
}
|
