dffce2150e
Specifically reading is done if ffs_sbget() and writing is done in ffs_sbput(). These functions are exported to libufs via the sbget() and sbput() functions which then used in the various filesystem utilities. This work is in preparation for adding subperblock check hashes. No functional change intended. Reviewed by: kib
153 lines
4.3 KiB
C
153 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rich $alz of BBN Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1990, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)clri.c 8.2 (Berkeley) 9/23/93";
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#endif /* not lint */
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#endif
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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/disklabel.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <libufs.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: clri special_device inode_number ...\n");
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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struct fs *fs;
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struct ufs1_dinode *dp1;
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struct ufs2_dinode *dp2;
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char *ibuf[MAXBSIZE];
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long generation, bsize;
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off_t offset;
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int fd, ret, inonum;
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char *fsname;
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void *v = ibuf;
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if (argc < 3)
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usage();
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fsname = *++argv;
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/* get the superblock. */
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if ((fd = open(fsname, O_RDWR, 0)) < 0)
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err(1, "%s", fsname);
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if ((ret = sbget(fd, &fs, -1)) != 0) {
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switch (ret) {
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case ENOENT:
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warn("Cannot find file system superblock");
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return (1);
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default:
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warn("Unable to read file system superblock");
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return (1);
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}
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}
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bsize = fs->fs_bsize;
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/* remaining arguments are inode numbers. */
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while (*++argv) {
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/* get the inode number. */
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if ((inonum = atoi(*argv)) <= 0)
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errx(1, "%s is not a valid inode number", *argv);
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(void)printf("clearing %d\n", inonum);
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/* read in the appropriate block. */
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offset = ino_to_fsba(fs, inonum); /* inode to fs blk */
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offset = fsbtodb(fs, offset); /* fs blk disk blk */
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offset *= DEV_BSIZE; /* disk blk to bytes */
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/* seek and read the block */
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if (lseek(fd, offset, SEEK_SET) < 0)
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err(1, "%s", fsname);
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if (read(fd, ibuf, bsize) != bsize)
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err(1, "%s", fsname);
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if (fs->fs_magic == FS_UFS2_MAGIC) {
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/* get the inode within the block. */
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dp2 = &(((struct ufs2_dinode *)v)
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[ino_to_fsbo(fs, inonum)]);
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/* clear the inode, and bump the generation count. */
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generation = dp2->di_gen + 1;
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memset(dp2, 0, sizeof(*dp2));
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dp2->di_gen = generation;
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} else {
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/* get the inode within the block. */
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dp1 = &(((struct ufs1_dinode *)v)
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[ino_to_fsbo(fs, inonum)]);
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/* clear the inode, and bump the generation count. */
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generation = dp1->di_gen + 1;
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memset(dp1, 0, sizeof(*dp1));
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dp1->di_gen = generation;
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}
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/* backup and write the block */
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if (lseek(fd, (off_t)-bsize, SEEK_CUR) < 0)
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err(1, "%s", fsname);
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if (write(fd, ibuf, bsize) != bsize)
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err(1, "%s", fsname);
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(void)fsync(fd);
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}
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(void)close(fd);
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exit(0);
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}
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