2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 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 //kbuild:lib-$(CONFIG_VOLUMEID) += volume_id.o util.o
23 #include "volume_id_internal.h"
26 /* Some detection routines do not set label or uuid anyway,
27 * so they are disabled. */
29 /* Looks for partitions, we don't use it: */
30 #define ENABLE_FEATURE_VOLUMEID_MAC 0
31 /* #define ENABLE_FEATURE_VOLUMEID_MSDOS 0 - NB: this one
32 * was not properly added to probe table anyway - ??! */
34 /* None of RAIDs have label or uuid, except LinuxRAID: */
35 #define ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID 0
36 #define ENABLE_FEATURE_VOLUMEID_ISWRAID 0
37 #define ENABLE_FEATURE_VOLUMEID_LSIRAID 0
38 #define ENABLE_FEATURE_VOLUMEID_LVM 0
39 #define ENABLE_FEATURE_VOLUMEID_NVIDIARAID 0
40 #define ENABLE_FEATURE_VOLUMEID_PROMISERAID 0
41 #define ENABLE_FEATURE_VOLUMEID_SILICONRAID 0
42 #define ENABLE_FEATURE_VOLUMEID_VIARAID 0
44 /* These filesystems also have no label or uuid: */
45 #define ENABLE_FEATURE_VOLUMEID_HPFS 0
46 #define ENABLE_FEATURE_VOLUMEID_UFS 0
49 typedef int FAST_FUNC (*raid_probe_fptr)(struct volume_id *id, /*uint64_t off,*/ uint64_t size);
50 typedef int FAST_FUNC (*probe_fptr)(struct volume_id *id /*, uint64_t off*/);
52 static const raid_probe_fptr raid1[] = {
53 #if ENABLE_FEATURE_VOLUMEID_LINUXRAID
54 volume_id_probe_linux_raid,
56 #if ENABLE_FEATURE_VOLUMEID_ISWRAID
57 volume_id_probe_intel_software_raid,
59 #if ENABLE_FEATURE_VOLUMEID_LSIRAID
60 volume_id_probe_lsi_mega_raid,
62 #if ENABLE_FEATURE_VOLUMEID_VIARAID
63 volume_id_probe_via_raid,
65 #if ENABLE_FEATURE_VOLUMEID_SILICONRAID
66 volume_id_probe_silicon_medley_raid,
68 #if ENABLE_FEATURE_VOLUMEID_NVIDIARAID
69 volume_id_probe_nvidia_raid,
71 #if ENABLE_FEATURE_VOLUMEID_PROMISERAID
72 volume_id_probe_promise_fasttrack_raid,
74 #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
75 volume_id_probe_highpoint_45x_raid,
79 static const probe_fptr raid2[] = {
80 #if ENABLE_FEATURE_VOLUMEID_LVM
84 #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
85 volume_id_probe_highpoint_37x_raid,
87 #if ENABLE_FEATURE_VOLUMEID_LUKS
92 /* signature in the first block, only small buffer needed */
93 static const probe_fptr fs1[] = {
94 #if ENABLE_FEATURE_VOLUMEID_FAT
97 #if ENABLE_FEATURE_VOLUMEID_EXFAT
98 volume_id_probe_exfat,
100 #if ENABLE_FEATURE_VOLUMEID_LFS
103 #if ENABLE_FEATURE_VOLUMEID_MAC
104 volume_id_probe_mac_partition_map,
106 #if ENABLE_FEATURE_VOLUMEID_SQUASHFS
107 volume_id_probe_squashfs,
109 #if ENABLE_FEATURE_VOLUMEID_XFS
112 #if ENABLE_FEATURE_VOLUMEID_BCACHE
113 volume_id_probe_bcache,
117 /* fill buffer with maximum */
118 static const probe_fptr fs2[] = {
119 #if ENABLE_FEATURE_VOLUMEID_LINUXSWAP
120 volume_id_probe_linux_swap,
122 #if ENABLE_FEATURE_VOLUMEID_EXT
125 #if ENABLE_FEATURE_VOLUMEID_BTRFS
126 volume_id_probe_btrfs,
128 #if ENABLE_FEATURE_VOLUMEID_REISERFS
129 volume_id_probe_reiserfs,
131 #if ENABLE_FEATURE_VOLUMEID_JFS
134 #if ENABLE_FEATURE_VOLUMEID_UDF
137 #if ENABLE_FEATURE_VOLUMEID_ISO9660
138 volume_id_probe_iso9660,
140 #if ENABLE_FEATURE_VOLUMEID_HFS
141 volume_id_probe_hfs_hfsplus,
143 #if ENABLE_FEATURE_VOLUMEID_UFS
146 #if ENABLE_FEATURE_VOLUMEID_F2FS
147 volume_id_probe_f2fs,
149 #if ENABLE_FEATURE_VOLUMEID_NILFS
150 volume_id_probe_nilfs,
152 #if ENABLE_FEATURE_VOLUMEID_NTFS
153 volume_id_probe_ntfs,
155 #if ENABLE_FEATURE_VOLUMEID_CRAMFS
156 volume_id_probe_cramfs,
158 #if ENABLE_FEATURE_VOLUMEID_ROMFS
159 volume_id_probe_romfs,
161 #if ENABLE_FEATURE_VOLUMEID_HPFS
162 volume_id_probe_hpfs,
164 #if ENABLE_FEATURE_VOLUMEID_SYSV
165 volume_id_probe_sysv,
167 #if ENABLE_FEATURE_VOLUMEID_MINIX
168 volume_id_probe_minix,
170 #if ENABLE_FEATURE_VOLUMEID_OCFS2
171 volume_id_probe_ocfs2,
173 #if ENABLE_FEATURE_VOLUMEID_UBIFS
174 volume_id_probe_ubifs,
178 int FAST_FUNC volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size)
182 /* probe for raid first, cause fs probes may be successful on raid members */
184 for (i = 0; i < ARRAY_SIZE(raid1); i++) {
185 if (raid1[i](id, /*off,*/ size) == 0)
192 for (i = 0; i < ARRAY_SIZE(raid2); i++) {
193 if (raid2[i](id /*,off*/) == 0)
199 /* signature in the first block, only small buffer needed */
200 for (i = 0; i < ARRAY_SIZE(fs1); i++) {
201 if (fs1[i](id /*,off*/) == 0)
207 /* fill buffer with maximum */
208 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
210 for (i = 0; i < ARRAY_SIZE(fs2); i++) {
211 if (fs2[i](id /*,off*/) == 0)
218 volume_id_free_buffer(id);
219 return (- id->error); /* 0 or -1 */
222 /* open volume by device node */
223 struct volume_id* FAST_FUNC volume_id_open_node(int fd)
225 struct volume_id *id;
227 id = xzalloc(sizeof(struct volume_id));
229 ///* close fd on device close */
235 /* open volume by major/minor */
236 struct volume_id* FAST_FUNC volume_id_open_dev_t(dev_t devt)
238 struct volume_id *id;
239 char *tmp_node[VOLUME_ID_PATH_MAX];
241 tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
242 (unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));
244 /* create temporary node to open block device */
246 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
247 bb_perror_msg_and_die("can't mknod(%s)", tmp_node);
249 id = volume_id_open_node(tmp_node);
256 void FAST_FUNC free_volume_id(struct volume_id *id)
261 //if (id->fd_close != 0) - always true
263 volume_id_free_buffer(id);
264 #ifdef UNUSED_PARTITION_CODE
265 free(id->partitions);