source: branches/3.2/mindi-busybox/util-linux/volume_id/volume_id.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
  • Property svn:eol-style set to native
File size: 6.4 KB
Line 
1/*
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
23
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
48typedef int FAST_FUNC (*raid_probe_fptr)(struct volume_id *id, /*uint64_t off,*/ uint64_t size);
49typedef int FAST_FUNC (*probe_fptr)(struct volume_id *id /*, uint64_t off*/);
50
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
96#if ENABLE_FEATURE_VOLUMEID_EXFAT
97    volume_id_probe_exfat,
98#endif
99#if ENABLE_FEATURE_VOLUMEID_MAC
100    volume_id_probe_mac_partition_map,
101#endif
102#if ENABLE_FEATURE_VOLUMEID_SQUASHFS
103    volume_id_probe_squashfs,
104#endif
105#if ENABLE_FEATURE_VOLUMEID_XFS
106    volume_id_probe_xfs,
107#endif
108};
109
110/* fill buffer with maximum */
111static const probe_fptr fs2[] = {
112#if ENABLE_FEATURE_VOLUMEID_LINUXSWAP
113    volume_id_probe_linux_swap,
114#endif
115#if ENABLE_FEATURE_VOLUMEID_EXT
116    volume_id_probe_ext,
117#endif
118#if ENABLE_FEATURE_VOLUMEID_BTRFS
119    volume_id_probe_btrfs,
120#endif
121#if ENABLE_FEATURE_VOLUMEID_REISERFS
122    volume_id_probe_reiserfs,
123#endif
124#if ENABLE_FEATURE_VOLUMEID_JFS
125    volume_id_probe_jfs,
126#endif
127#if ENABLE_FEATURE_VOLUMEID_UDF
128    volume_id_probe_udf,
129#endif
130#if ENABLE_FEATURE_VOLUMEID_ISO9660
131    volume_id_probe_iso9660,
132#endif
133#if ENABLE_FEATURE_VOLUMEID_HFS
134    volume_id_probe_hfs_hfsplus,
135#endif
136#if ENABLE_FEATURE_VOLUMEID_UFS
137    volume_id_probe_ufs,
138#endif
139#if ENABLE_FEATURE_VOLUMEID_NILFS
140    volume_id_probe_nilfs,
141#endif
142#if ENABLE_FEATURE_VOLUMEID_NTFS
143    volume_id_probe_ntfs,
144#endif
145#if ENABLE_FEATURE_VOLUMEID_CRAMFS
146    volume_id_probe_cramfs,
147#endif
148#if ENABLE_FEATURE_VOLUMEID_ROMFS
149    volume_id_probe_romfs,
150#endif
151#if ENABLE_FEATURE_VOLUMEID_HPFS
152    volume_id_probe_hpfs,
153#endif
154#if ENABLE_FEATURE_VOLUMEID_SYSV
155    volume_id_probe_sysv,
156#endif
157#if ENABLE_FEATURE_VOLUMEID_MINIX
158    volume_id_probe_minix,
159#endif
160#if ENABLE_FEATURE_VOLUMEID_OCFS2
161    volume_id_probe_ocfs2,
162#endif
163};
164
165int FAST_FUNC volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size)
166{
167    unsigned i;
168
169    /* probe for raid first, cause fs probes may be successful on raid members */
170    if (size) {
171        for (i = 0; i < ARRAY_SIZE(raid1); i++) {
172            if (raid1[i](id, /*off,*/ size) == 0)
173                goto ret;
174            if (id->error)
175                goto ret;
176        }
177    }
178
179    for (i = 0; i < ARRAY_SIZE(raid2); i++) {
180        if (raid2[i](id /*,off*/) == 0)
181            goto ret;
182        if (id->error)
183            goto ret;
184    }
185
186    /* signature in the first block, only small buffer needed */
187    for (i = 0; i < ARRAY_SIZE(fs1); i++) {
188        if (fs1[i](id /*,off*/) == 0)
189            goto ret;
190        if (id->error)
191            goto ret;
192    }
193
194    /* fill buffer with maximum */
195    volume_id_get_buffer(id, 0, SB_BUFFER_SIZE);
196
197    for (i = 0; i < ARRAY_SIZE(fs2); i++) {
198        if (fs2[i](id /*,off*/) == 0)
199            goto ret;
200        if (id->error)
201            goto ret;
202    }
203
204 ret:
205    volume_id_free_buffer(id);
206    return (- id->error); /* 0 or -1 */
207}
208
209/* open volume by device node */
210struct volume_id* FAST_FUNC volume_id_open_node(int fd)
211{
212    struct volume_id *id;
213
214    id = xzalloc(sizeof(struct volume_id));
215    id->fd = fd;
216    ///* close fd on device close */
217    //id->fd_close = 1;
218    return id;
219}
220
221#ifdef UNUSED
222/* open volume by major/minor */
223struct volume_id* FAST_FUNC volume_id_open_dev_t(dev_t devt)
224{
225    struct volume_id *id;
226    char *tmp_node[VOLUME_ID_PATH_MAX];
227
228    tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
229        (unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));
230
231    /* create temporary node to open block device */
232    unlink(tmp_node);
233    if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
234        bb_perror_msg_and_die("can't mknod(%s)", tmp_node);
235
236    id = volume_id_open_node(tmp_node);
237    unlink(tmp_node);
238    free(tmp_node);
239    return id;
240}
241#endif
242
243void FAST_FUNC free_volume_id(struct volume_id *id)
244{
245    if (id == NULL)
246        return;
247
248    //if (id->fd_close != 0) - always true
249        close(id->fd);
250    volume_id_free_buffer(id);
251#ifdef UNUSED_PARTITION_CODE
252    free(id->partitions);
253#endif
254    free(id);
255}
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