2 * Copyright (c) 2002 Juli Mallett. All rights reserved.
4 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
5 * FreeBSD project. Redistribution and use in source and binary forms, with
6 * or without modification, are permitted provided that the following
9 * 1. Redistribution of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * 2. Redistribution in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/mount.h>
33 #include <sys/disklabel.h>
36 #include <ufs/ufs/ufsmount.h>
37 #include <ufs/ufs/dinode.h>
38 #include <ufs/ffs/fs.h>
47 static int superblocks[] = SBLOCKSEARCH;
50 sbread(struct uufsd *disk)
58 superblock = superblocks[0];
60 for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
61 if (bread(disk, superblock, disk->d_sb, SBLOCKSIZE) == -1) {
62 ERROR(disk, "non-existent or truncated superblock");
65 if (fs->fs_magic == FS_UFS1_MAGIC)
67 if (fs->fs_magic == FS_UFS2_MAGIC &&
68 fs->fs_sblockloc == superblock)
70 if (fs->fs_bsize <= MAXBSIZE &&
71 (size_t)fs->fs_bsize >= sizeof(*fs)) {
77 if (superblock == -1 || disk->d_ufs == 0) {
79 * Other error cases will result in errno being set, here we
80 * must set it to indicate no superblock could be found with
81 * which to associate this disk/filesystem.
83 ERROR(disk, "no usable known superblock found");
87 disk->d_bsize = fs->fs_fsize / fsbtodb(fs, 1);
88 disk->d_sblock = superblock / disk->d_bsize;
93 sbwrite(struct uufsd *disk, int all)
102 if (!disk->d_sblock) {
103 disk->d_sblock = disk->d_fs.fs_sblockloc / disk->d_bsize;
106 if (bwrite(disk, disk->d_sblock, fs, SBLOCKSIZE) == -1) {
107 ERROR(disk, "failed to write superblock");
111 for (i = 0; i < fs->fs_ncg; i++)
112 if (bwrite(disk, fsbtodb(fs, cgsblock(fs, i)),
113 fs, SBLOCKSIZE) == -1) {
114 ERROR(disk, "failed to update a superblock");