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Denis Vlasenkode7684a2008-02-18 21:08:49 +00001/*
2 * volume_id - reads filesystem label and uuid
3 *
4 * Copyright (C) 2005 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
Denis Vlasenkod25c33f2008-03-17 09:25:05 +000023
24/* Some detection routines do not set label or uuid anyway,
25 * so they are disabled. */
26
27/* Looks for partitions, we don't use it: */
28#define ENABLE_FEATURE_VOLUMEID_MAC 0
29/* #define ENABLE_FEATURE_VOLUMEID_MSDOS 0 - NB: this one
30 * was not properly added to probe table anyway - ??! */
31
32/* None of RAIDs have label or uuid, except LinuxRAID: */
33#define ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID 0
34#define ENABLE_FEATURE_VOLUMEID_ISWRAID 0
35#define ENABLE_FEATURE_VOLUMEID_LSIRAID 0
36#define ENABLE_FEATURE_VOLUMEID_LVM 0
37#define ENABLE_FEATURE_VOLUMEID_NVIDIARAID 0
38#define ENABLE_FEATURE_VOLUMEID_PROMISERAID 0
39#define ENABLE_FEATURE_VOLUMEID_SILICONRAID 0
40#define ENABLE_FEATURE_VOLUMEID_VIARAID 0
41
42/* These filesystems also have no label or uuid: */
43#define ENABLE_FEATURE_VOLUMEID_MINIX 0
44#define ENABLE_FEATURE_VOLUMEID_HPFS 0
45#define ENABLE_FEATURE_VOLUMEID_UFS 0
46
47
Denis Vlasenko28ea4292009-02-15 05:51:19 +000048typedef int (*raid_probe_fptr)(struct volume_id *id, /*uint64_t off,*/ uint64_t size);
49typedef int (*probe_fptr)(struct volume_id *id /*, uint64_t off*/);
Denis Vlasenkode7684a2008-02-18 21:08:49 +000050
51static const raid_probe_fptr raid1[] = {
52#if ENABLE_FEATURE_VOLUMEID_LINUXRAID
53 volume_id_probe_linux_raid,
54#endif
55#if ENABLE_FEATURE_VOLUMEID_ISWRAID
56 volume_id_probe_intel_software_raid,
57#endif
58#if ENABLE_FEATURE_VOLUMEID_LSIRAID
59 volume_id_probe_lsi_mega_raid,
60#endif
61#if ENABLE_FEATURE_VOLUMEID_VIARAID
62 volume_id_probe_via_raid,
63#endif
64#if ENABLE_FEATURE_VOLUMEID_SILICONRAID
65 volume_id_probe_silicon_medley_raid,
66#endif
67#if ENABLE_FEATURE_VOLUMEID_NVIDIARAID
68 volume_id_probe_nvidia_raid,
69#endif
70#if ENABLE_FEATURE_VOLUMEID_PROMISERAID
71 volume_id_probe_promise_fasttrack_raid,
72#endif
73#if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
74 volume_id_probe_highpoint_45x_raid,
75#endif
76};
77
78static const probe_fptr raid2[] = {
79#if ENABLE_FEATURE_VOLUMEID_LVM
80 volume_id_probe_lvm1,
81 volume_id_probe_lvm2,
82#endif
83#if ENABLE_FEATURE_VOLUMEID_HIGHPOINTRAID
84 volume_id_probe_highpoint_37x_raid,
85#endif
86#if ENABLE_FEATURE_VOLUMEID_LUKS
87 volume_id_probe_luks,
88#endif
89};
90
91/* signature in the first block, only small buffer needed */
92static const probe_fptr fs1[] = {
93#if ENABLE_FEATURE_VOLUMEID_FAT
94 volume_id_probe_vfat,
95#endif
Denis Vlasenkod25c33f2008-03-17 09:25:05 +000096#if ENABLE_FEATURE_VOLUMEID_MAC
97 volume_id_probe_mac_partition_map,
98#endif
Denis Vlasenkode7684a2008-02-18 21:08:49 +000099#if ENABLE_FEATURE_VOLUMEID_XFS
100 volume_id_probe_xfs,
101#endif
102};
103
104/* fill buffer with maximum */
105static const probe_fptr fs2[] = {
106#if ENABLE_FEATURE_VOLUMEID_LINUXSWAP
107 volume_id_probe_linux_swap,
108#endif
109#if ENABLE_FEATURE_VOLUMEID_EXT
110 volume_id_probe_ext,
111#endif
Vladimir Dronnikov662e8b72009-11-01 23:05:09 +0100112#if ENABLE_FEATURE_VOLUMEID_BTRFS
113 volume_id_probe_btrfs,
114#endif
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000115#if ENABLE_FEATURE_VOLUMEID_REISERFS
116 volume_id_probe_reiserfs,
117#endif
118#if ENABLE_FEATURE_VOLUMEID_JFS
119 volume_id_probe_jfs,
120#endif
121#if ENABLE_FEATURE_VOLUMEID_UDF
122 volume_id_probe_udf,
123#endif
124#if ENABLE_FEATURE_VOLUMEID_ISO9660
125 volume_id_probe_iso9660,
126#endif
127#if ENABLE_FEATURE_VOLUMEID_HFS
128 volume_id_probe_hfs_hfsplus,
129#endif
130#if ENABLE_FEATURE_VOLUMEID_UFS
131 volume_id_probe_ufs,
132#endif
133#if ENABLE_FEATURE_VOLUMEID_NTFS
134 volume_id_probe_ntfs,
135#endif
136#if ENABLE_FEATURE_VOLUMEID_CRAMFS
137 volume_id_probe_cramfs,
138#endif
139#if ENABLE_FEATURE_VOLUMEID_ROMFS
140 volume_id_probe_romfs,
141#endif
142#if ENABLE_FEATURE_VOLUMEID_HPFS
143 volume_id_probe_hpfs,
144#endif
145#if ENABLE_FEATURE_VOLUMEID_SYSV
146 volume_id_probe_sysv,
147#endif
148#if ENABLE_FEATURE_VOLUMEID_MINIX
149 volume_id_probe_minix,
150#endif
151#if ENABLE_FEATURE_VOLUMEID_OCFS2
152 volume_id_probe_ocfs2,
153#endif
154};
155
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000156int volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size)
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000157{
Denis Vlasenko6b06cb82008-05-15 21:30:45 +0000158 unsigned i;
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000159
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000160 /* probe for raid first, cause fs probes may be successful on raid members */
161 if (size) {
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000162 for (i = 0; i < ARRAY_SIZE(raid1); i++) {
163 if (raid1[i](id, /*off,*/ size) == 0)
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000164 goto ret;
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000165 if (id->error)
166 goto ret;
167 }
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000168 }
169
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000170 for (i = 0; i < ARRAY_SIZE(raid2); i++) {
171 if (raid2[i](id /*,off*/) == 0)
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000172 goto ret;
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000173 if (id->error)
174 goto ret;
175 }
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000176
177 /* signature in the first block, only small buffer needed */
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000178 for (i = 0; i < ARRAY_SIZE(fs1); i++) {
179 if (fs1[i](id /*,off*/) == 0)
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000180 goto ret;
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000181 if (id->error)
182 goto ret;
183 }
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000184
185 /* fill buffer with maximum */
186 volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
187
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000188 for (i = 0; i < ARRAY_SIZE(fs2); i++) {
189 if (fs2[i](id /*,off*/) == 0)
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000190 goto ret;
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000191 if (id->error)
192 goto ret;
193 }
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000194
195 ret:
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000196 volume_id_free_buffer(id);
Denis Vlasenko28ea4292009-02-15 05:51:19 +0000197 return (- id->error); /* 0 or -1 */
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000198
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000199}
200
201/* open volume by device node */
Denis Vlasenko582dff02008-10-19 19:36:30 +0000202struct volume_id *volume_id_open_node(int fd)
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000203{
204 struct volume_id *id;
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000205
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000206 id = xzalloc(sizeof(struct volume_id));
207 id->fd = fd;
208 ///* close fd on device close */
209 //id->fd_close = 1;
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000210 return id;
211}
212
213#ifdef UNUSED
214/* open volume by major/minor */
215struct volume_id *volume_id_open_dev_t(dev_t devt)
216{
217 struct volume_id *id;
218 char *tmp_node[VOLUME_ID_PATH_MAX];
219
220 tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
221 (unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));
222
223 /* create temporary node to open block device */
224 unlink(tmp_node);
225 if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
226 bb_perror_msg_and_die("cannot mknod(%s)", tmp_node);
227
228 id = volume_id_open_node(tmp_node);
229 unlink(tmp_node);
230 free(tmp_node);
231 return id;
232}
233#endif
234
235void free_volume_id(struct volume_id *id)
236{
237 if (id == NULL)
238 return;
239
240 //if (id->fd_close != 0) - always true
241 close(id->fd);
242 volume_id_free_buffer(id);
Denis Vlasenkoc5b73722008-03-17 09:21:26 +0000243#ifdef UNUSED_PARTITION_CODE
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000244 free(id->partitions);
Denis Vlasenkoc5b73722008-03-17 09:21:26 +0000245#endif
Denis Vlasenkode7684a2008-02-18 21:08:49 +0000246 free(id);
247}