88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
|
|
* Copyright (c) 2003 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 <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <libufs.h>
|
|
|
|
int
|
|
cgread(struct uufsd *disk)
|
|
{
|
|
return (cgread1(disk, disk->d_ccg++));
|
|
}
|
|
|
|
int
|
|
cgread1(struct uufsd *disk, int c)
|
|
{
|
|
struct fs *fs;
|
|
off_t ccg;
|
|
|
|
fs = &disk->d_fs;
|
|
|
|
if (c >= fs->fs_ncg) {
|
|
return (0);
|
|
}
|
|
ccg = fsbtodb(fs, cgtod(fs, c)) * disk->d_bsize;
|
|
if (bread(disk, fsbtodb(fs, cgtod(fs, c)), disk->d_cgunion.d_buf,
|
|
fs->fs_bsize) == -1) {
|
|
ERROR(disk, "unable to read cylinder group");
|
|
return (-1);
|
|
}
|
|
disk->d_lcg = c;
|
|
return (1);
|
|
}
|
|
|
|
int
|
|
cgwrite1(struct uufsd *disk, int c)
|
|
{
|
|
struct fs *fs;
|
|
|
|
fs = &disk->d_fs;
|
|
if (bwrite(disk, fsbtodb(fs, cgtod(fs, c)),
|
|
disk->d_cgunion.d_buf, fs->fs_bsize) == -1) {
|
|
ERROR(disk, "unable to write cylinder group");
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|