2 * Copyright (c) 2002, 2003 Gordon Tetlow
3 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
4 * Copyright (c) 2014 The FreeBSD Foundation
7 * This software was developed by Edward Tomasz Napierala under sponsorship
8 * from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 #include <sys/types.h>
41 #include <ufs/ufs/dinode.h>
42 #include <ufs/ffs/fs.h>
46 static const int superblocks[] = SBLOCKSEARCH;
49 fstyp_ufs(FILE *fp, char *label, size_t labelsize)
55 * Walk through the standard places that superblocks hide and look
56 * for UFS magic. If we find magic, then check that the size in the
57 * superblock corresponds to the size of the underlying provider.
58 * Finally, look for a volume label and create an appropriate
59 * provider based on that.
61 for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
62 fs = (struct fs *)read_buf(fp, superblock, SBLOCKSIZE);
66 * Check for magic. We also need to check if file system size is equal
67 * to providers size, because sysinstall(8) used to bogusly put first
68 * partition at offset 0 instead of 16, and glabel/ufs would find file
69 * system on slice instead of partition.
72 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
73 ((pp->mediasize / fs->fs_fsize == fs->fs_old_size) ||
74 (pp->mediasize / fs->fs_fsize == fs->fs_providersize))) {
76 } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
77 ((pp->mediasize / fs->fs_fsize == fs->fs_size) ||
78 (pp->mediasize / fs->fs_fsize == fs->fs_providersize))) {
85 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0) {
87 } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0) {
95 if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 ||
96 fs->fs_bsize < MINBSIZE ||
97 (size_t)fs->fs_bsize < sizeof(struct fs)) {
102 strlcpy(label, fs->fs_volname, labelsize);