9fc5d538fc
document the libufs interface for fetching and storing inodes. The undocumented getino / putino interface has been replaced with a new getinode / putinode interface. Convert the utilities that had been using the undocumented interface to use the new documented interface. No functional change (as for now the libufs library does not do inode check-hashes). Reviewed by: kib Tested by: Peter Holm Sponsored by: Netflix
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002 Juli Mallett. All rights reserved.
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*
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* This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
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* FreeBSD project. Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistribution in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/disklabel.h>
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#include <sys/stat.h>
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#include <ufs/ufs/ufsmount.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <libufs.h>
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int
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getinode(struct uufsd *disk, union dinodep *dp, ino_t inum)
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{
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ino_t min, max;
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caddr_t inoblock;
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struct fs *fs;
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ERROR(disk, NULL);
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fs = &disk->d_fs;
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if (inum >= (ino_t)fs->fs_ipg * fs->fs_ncg) {
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ERROR(disk, "inode number out of range");
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return (-1);
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}
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inoblock = disk->d_inoblock;
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min = disk->d_inomin;
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max = disk->d_inomax;
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if (inoblock == NULL) {
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inoblock = malloc(fs->fs_bsize);
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if (inoblock == NULL) {
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ERROR(disk, "unable to allocate inode block");
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return (-1);
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}
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disk->d_inoblock = inoblock;
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}
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if (inum >= min && inum < max)
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goto gotit;
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bread(disk, fsbtodb(fs, ino_to_fsba(fs, inum)), inoblock,
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fs->fs_bsize);
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disk->d_inomin = min = inum - (inum % INOPB(fs));
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disk->d_inomax = max = min + INOPB(fs);
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gotit: switch (disk->d_ufs) {
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case 1:
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disk->d_dp.dp1 = &((struct ufs1_dinode *)inoblock)[inum - min];
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if (dp != NULL)
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*dp = disk->d_dp;
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return (0);
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case 2:
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disk->d_dp.dp2 = &((struct ufs2_dinode *)inoblock)[inum - min];
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if (dp != NULL)
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*dp = disk->d_dp;
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return (0);
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default:
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break;
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}
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ERROR(disk, "unknown UFS filesystem type");
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return (-1);
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}
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int
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putinode(struct uufsd *disk)
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{
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struct fs *fs;
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fs = &disk->d_fs;
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if (disk->d_inoblock == NULL) {
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ERROR(disk, "No inode block allocated");
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return (-1);
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}
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if (bwrite(disk, fsbtodb(fs, ino_to_fsba(&disk->d_fs, disk->d_inomin)),
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disk->d_inoblock, disk->d_fs.fs_bsize) <= 0)
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return (-1);
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return (0);
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}
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