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_MINIX 0
46 #define ENABLE_FEATURE_VOLUMEID_HPFS 0
47 #define ENABLE_FEATURE_VOLUMEID_UFS 0
50 typedef int FAST_FUNC (*raid_probe_fptr)(struct volume_id *id, /*uint64_t off,*/ uint64_t size);
51 typedef int FAST_FUNC (*probe_fptr)(struct volume_id *id /*, uint64_t off*/);
53 static const raid_probe_fptr raid1[] = {
54 #if ENABLE_FEATURE_VOLUMEID_LINUXRAID
55 volume_id_probe_linux_raid,
57 #if ENABLE_FEATURE_VOLUMEID_ISWRAID
58 volume_id_probe_intel_software_raid,
60 #if ENABLE_FEATURE_VOLUMEID_LSIRAID
61 volume_id_probe_lsi_mega_raid,
63 #if ENABLE_FEATURE_VOLUMEID_VIARAID
64 volume_id_probe_via_raid,
66 #if ENABLE_FEATURE_VOLUMEID_SILICONRAID
67 volume_id_probe_silicon_medley_raid,
69 #if ENABLE_FEATURE_VOLUMEID_NVIDIARAID
70 volume_id_probe_nvidia_raid,
72 #if ENABLE_FEATURE_VOLUMEID_PROMISERAID
73 volume_id_probe_promise_fasttrack_raid,
75 #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
76 volume_id_probe_highpoint_45x_raid,
80 static const probe_fptr raid2[] = {
81 #if ENABLE_FEATURE_VOLUMEID_LVM
85 #if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
86 volume_id_probe_highpoint_37x_raid,
88 #if ENABLE_FEATURE_VOLUMEID_LUKS
93 /* signature in the first block, only small buffer needed */
94 static const probe_fptr fs1[] = {
95 #if ENABLE_FEATURE_VOLUMEID_FAT
98 #if ENABLE_FEATURE_VOLUMEID_EXFAT
99 volume_id_probe_exfat,
101 #if ENABLE_FEATURE_VOLUMEID_MAC
102 volume_id_probe_mac_partition_map,
104 #if ENABLE_FEATURE_VOLUMEID_SQUASHFS
105 volume_id_probe_squashfs,
107 #if ENABLE_FEATURE_VOLUMEID_XFS
112 /* fill buffer with maximum */
113 static const probe_fptr fs2[] = {
114 #if ENABLE_FEATURE_VOLUMEID_LINUXSWAP
115 volume_id_probe_linux_swap,
117 #if ENABLE_FEATURE_VOLUMEID_EXT
120 #if ENABLE_FEATURE_VOLUMEID_BTRFS
121 volume_id_probe_btrfs,
123 #if ENABLE_FEATURE_VOLUMEID_REISERFS
124 volume_id_probe_reiserfs,
126 #if ENABLE_FEATURE_VOLUMEID_JFS
129 #if ENABLE_FEATURE_VOLUMEID_UDF
132 #if ENABLE_FEATURE_VOLUMEID_ISO9660
133 volume_id_probe_iso9660,
135 #if ENABLE_FEATURE_VOLUMEID_HFS
136 volume_id_probe_hfs_hfsplus,
138 #if ENABLE_FEATURE_VOLUMEID_UFS
141 #if ENABLE_FEATURE_VOLUMEID_F2FS
142 volume_id_probe_f2fs,
144 #if ENABLE_FEATURE_VOLUMEID_NILFS
145 volume_id_probe_nilfs,
147 #if ENABLE_FEATURE_VOLUMEID_NTFS
148 volume_id_probe_ntfs,
150 #if ENABLE_FEATURE_VOLUMEID_CRAMFS
151 volume_id_probe_cramfs,
153 #if ENABLE_FEATURE_VOLUMEID_ROMFS
154 volume_id_probe_romfs,
156 #if ENABLE_FEATURE_VOLUMEID_HPFS
157 volume_id_probe_hpfs,
159 #if ENABLE_FEATURE_VOLUMEID_SYSV
160 volume_id_probe_sysv,
162 #if ENABLE_FEATURE_VOLUMEID_MINIX
163 volume_id_probe_minix,
165 #if ENABLE_FEATURE_VOLUMEID_OCFS2
166 volume_id_probe_ocfs2,
170 int FAST_FUNC volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size)
174 /* probe for raid first, cause fs probes may be successful on raid members */
176 for (i = 0; i < ARRAY_SIZE(raid1); i++) {
177 if (raid1[i](id, /*off,*/ size) == 0)
184 for (i = 0; i < ARRAY_SIZE(raid2); i++) {
185 if (raid2[i](id /*,off*/) == 0)
191 /* signature in the first block, only small buffer needed */
192 for (i = 0; i < ARRAY_SIZE(fs1); i++) {
193 if (fs1[i](id /*,off*/) == 0)
199 /* fill buffer with maximum */
200 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
202 for (i = 0; i < ARRAY_SIZE(fs2); i++) {
203 if (fs2[i](id /*,off*/) == 0)
210 volume_id_free_buffer(id);
211 return (- id->error); /* 0 or -1 */
214 /* open volume by device node */
215 struct volume_id* FAST_FUNC volume_id_open_node(int fd)
217 struct volume_id *id;
219 id = xzalloc(sizeof(struct volume_id));
221 ///* close fd on device close */
227 /* open volume by major/minor */
228 struct volume_id* FAST_FUNC volume_id_open_dev_t(dev_t devt)
230 struct volume_id *id;
231 char *tmp_node[VOLUME_ID_PATH_MAX];
233 tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
234 (unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));
236 /* create temporary node to open block device */
238 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
239 bb_perror_msg_and_die("can't mknod(%s)", tmp_node);
241 id = volume_id_open_node(tmp_node);
248 void FAST_FUNC free_volume_id(struct volume_id *id)
253 //if (id->fd_close != 0) - always true
255 volume_id_free_buffer(id);
256 #ifdef UNUSED_PARTITION_CODE
257 free(id->partitions);