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ada981b228
the old 8-bit fs_old_flags to the new location the first time that the filesystem is mounted by a new kernel. One of the unused flags in fs_old_flags is used to indicate that the flags have been moved. Leave the fs_old_flags word intact so that it will work properly if used on an old kernel. Change the fs_sblockloc superblock location field to be in units of bytes instead of in units of filesystem fragments. The old units did not work properly when the fragment size exceeeded the superblock size (8192). Update old fs_sblockloc values at the same time that the flags are moved. Suggested by: BOUWSMA Barry <freebsd-misuser@netscum.dyndns.dk> Sponsored by: DARPA & NAI Labs.
238 lines
6.4 KiB
C
238 lines
6.4 KiB
C
/*
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* Copyright (c) 1981, 1983, 1993
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* The Regents of the University of California. All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1981, 1983, 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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#if 0
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static const char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* badsect
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*
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* Badsect takes a list of file-system relative sector numbers
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* and makes files containing the blocks of which these sectors are a part.
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* It can be used to contain sectors which have problems if these sectors
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* are not part of the bad file for the pack (see bad144). For instance,
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* this program can be used if the driver for the file system in question
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* does not support bad block forwarding.
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*/
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#include <sys/param.h>
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#include <sys/stat.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 <dirent.h>
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#include <fcntl.h>
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#include <paths.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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union {
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struct fs fs;
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char fsx[SBLOCKSIZE];
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} ufs;
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#define sblock ufs.fs
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union {
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struct cg cg;
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char cgx[MAXBSIZE];
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} ucg;
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#define acg ucg.cg
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struct fs *fs;
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int fso, fsi;
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int errs;
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long dev_bsize = 1;
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char buf[MAXBSIZE];
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void rdfs(daddr_t, int, char *);
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int chkuse(daddr_t, int);
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/*
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* Possible superblock locations ordered from most to least likely.
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*/
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static int sblock_try[] = SBLOCKSEARCH;
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static void
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usage(void)
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{
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fprintf(stderr, "usage: badsect bbdir blkno ...\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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daddr_t diskbn;
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daddr_t number;
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struct stat stbuf, devstat;
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struct dirent *dp;
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DIR *dirp;
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char name[2 * MAXPATHLEN];
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char *name_dir_end;
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int i;
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if (argc < 3)
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usage();
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if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0)
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err(2, "%s", argv[1]);
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strcpy(name, _PATH_DEV);
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if ((dirp = opendir(name)) == NULL)
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err(3, "%s", name);
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name_dir_end = name + strlen(name);
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while ((dp = readdir(dirp)) != NULL) {
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strcpy(name_dir_end, dp->d_name);
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if (lstat(name, &devstat) < 0)
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err(4, "%s", name);
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if (stbuf.st_dev == devstat.st_rdev &&
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(devstat.st_mode & IFMT) == IFCHR)
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break;
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}
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closedir(dirp);
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if (dp == NULL) {
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printf("Cannot find dev 0%lo corresponding to %s\n",
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(u_long)stbuf.st_rdev, argv[1]);
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exit(5);
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}
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if ((fsi = open(name, O_RDONLY)) < 0)
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err(6, "%s", name);
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fs = &sblock;
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for (i = 0; sblock_try[i] != -1; i++) {
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rdfs(sblock_try[i] / dev_bsize, SBLOCKSIZE, (char *)fs);
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if ((fs->fs_magic == FS_UFS1_MAGIC ||
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(fs->fs_magic == FS_UFS2_MAGIC &&
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fs->fs_sblockloc == sblock_try[i])) &&
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fs->fs_bsize <= MAXBSIZE &&
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fs->fs_bsize >= sizeof(struct fs))
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break;
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}
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if (sblock_try[i] == -1) {
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printf("Cannot find file system\n");
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exit(7);
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}
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dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
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for (argc -= 2, argv += 2; argc > 0; argc--, argv++) {
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number = atol(*argv);
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if (chkuse(number, 1))
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continue;
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/*
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* Print a warning if converting the block number to a dev_t
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* will truncate it. badsect was not very useful in versions
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* of BSD before 4.4 because dev_t was 16 bits and another
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* bit was lost by bogus sign extensions.
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*/
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diskbn = dbtofsb(fs, number);
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if ((dev_t)diskbn != diskbn) {
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printf("sector %ld cannot be represented as a dev_t\n",
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(long)number);
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errs++;
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}
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else if (mknod(*argv, IFMT|0600, (dev_t)diskbn) < 0) {
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warn("%s", *argv);
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errs++;
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}
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}
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printf("Don't forget to run ``fsck %s''\n", name);
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exit(errs);
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}
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int
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chkuse(daddr_t blkno, int cnt)
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{
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int cg;
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daddr_t fsbn, bn;
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fsbn = dbtofsb(fs, blkno);
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if ((unsigned)(fsbn+cnt) > fs->fs_size) {
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printf("block %ld out of range of file system\n", (long)blkno);
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return (1);
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}
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cg = dtog(fs, fsbn);
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if (fsbn < cgdmin(fs, cg)) {
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if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) {
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printf("block %ld in non-data area: cannot attach\n",
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(long)blkno);
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return (1);
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}
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} else {
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if ((fsbn+cnt) > cgbase(fs, cg+1)) {
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printf("block %ld in non-data area: cannot attach\n",
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(long)blkno);
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return (1);
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}
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}
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rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize,
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(char *)&acg);
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if (!cg_chkmagic(&acg)) {
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fprintf(stderr, "cg %d: bad magic number\n", cg);
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errs++;
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return (1);
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}
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bn = dtogd(fs, fsbn);
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if (isclr(cg_blksfree(&acg), bn))
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printf("Warning: sector %ld is in use\n", (long)blkno);
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return (0);
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}
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/*
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* read a block from the file system
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*/
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void
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rdfs(daddr_t bno, int size, char *bf)
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{
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int n;
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if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) {
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printf("seek error: %ld\n", (long)bno);
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err(1, "rdfs");
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}
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n = read(fsi, bf, size);
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if (n != size) {
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printf("read error: %ld\n", (long)bno);
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err(1, "rdfs");
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}
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}
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