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/*
* Copyright (c) 2002 Juli Mallett. All rights reserved.
*
* This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
* FreeBSD project. Redistribution and use in source and binary forms, with
* or without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistribution 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 AUTHOR ``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 AUTHOR 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/param.h>
#include <sys/mount.h>
#include <sys/disklabel.h>
#include <sys/stat.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <libufs.h>
static int superblocks[] = SBLOCKSEARCH;
int
sbread(struct uufsd *disk)
{
struct fs *fs;
int sb, superblock;
ERROR(disk, NULL);
fs = &disk->d_fs;
superblock = superblocks[0];
for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
if (bread(disk, superblock, disk->d_sb, SBLOCKSIZE) == -1) {
ERROR(disk, "non-existent or truncated superblock");
return (-1);
}
if (fs->fs_magic == FS_UFS1_MAGIC)
disk->d_ufs = 1;
if (fs->fs_magic == FS_UFS2_MAGIC &&
fs->fs_sblockloc == superblock)
disk->d_ufs = 2;
if (fs->fs_bsize <= MAXBSIZE &&
(size_t)fs->fs_bsize >= sizeof(*fs)) {
if (disk->d_ufs)
break;
}
disk->d_ufs = 0;
}
if (superblock == -1 || disk->d_ufs == 0) {
/*
* Other error cases will result in errno being set, here we
* must set it to indicate no superblock could be found with
* which to associate this disk/filesystem.
*/
ERROR(disk, "no usable known superblock found");
errno = ENOENT;
return (-1);
}
disk->d_bsize = fs->fs_fsize / fsbtodb(fs, 1);
disk->d_sblock = superblock / disk->d_bsize;
return (0);
}
int
sbwrite(struct uufsd *disk, int all)
{
struct fs *fs;
int i;
ERROR(disk, NULL);
fs = &disk->d_fs;
if (!disk->d_sblock) {
disk->d_sblock = disk->d_fs.fs_sblockloc / disk->d_bsize;
}
if (bwrite(disk, disk->d_sblock, fs, SBLOCKSIZE) == -1) {
ERROR(disk, "failed to write superblock");
return (-1);
}
if (all) {
for (i = 0; i < fs->fs_ncg; i++)
if (bwrite(disk, fsbtodb(fs, cgsblock(fs, i)),
fs, SBLOCKSIZE) == -1) {
ERROR(disk, "failed to update a superblock");
return (-1);
}
}
return (0);
}
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