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
|
/*-
* Copyright (c) 2002, 2003 Gordon Tetlow
* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* Copyright (c) 2014 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Edward Tomasz Napierala under sponsorship
* from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include "fstyp.h"
static const int superblocks[] = SBLOCKSEARCH;
int
fstyp_ufs(FILE *fp, char *label, size_t labelsize)
{
int sb, superblock;
struct fs *fs;
/*
* Walk through the standard places that superblocks hide and look
* for UFS magic. If we find magic, then check that the size in the
* superblock corresponds to the size of the underlying provider.
* Finally, look for a volume label and create an appropriate
* provider based on that.
*/
for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
fs = (struct fs *)read_buf(fp, superblock, SBLOCKSIZE);
if (fs == NULL)
continue;
/*
* Check for magic. We also need to check if file system size is equal
* to providers size, because sysinstall(8) used to bogusly put first
* partition at offset 0 instead of 16, and glabel/ufs would find file
* system on slice instead of partition.
*/
#ifdef notyet
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
((pp->mediasize / fs->fs_fsize == fs->fs_old_size) ||
(pp->mediasize / fs->fs_fsize == fs->fs_providersize))) {
/* Valid UFS1. */
} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
((pp->mediasize / fs->fs_fsize == fs->fs_size) ||
(pp->mediasize / fs->fs_fsize == fs->fs_providersize))) {
/* Valid UFS2. */
} else {
g_free(fs);
continue;
}
#else
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0) {
/* Valid UFS1. */
} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0) {
/* Valid UFS2. */
} else {
free(fs);
continue;
}
#endif
if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 ||
fs->fs_bsize < MINBSIZE ||
(size_t)fs->fs_bsize < sizeof(struct fs)) {
free(fs);
continue;
}
strlcpy(label, fs->fs_volname, labelsize);
free(fs);
return (0);
}
return (1);
}
|
