42614ed3f3
64 bit block pointers, extended attribute storage, and a few other things. This commit does not yet include the code to manipulate the extended storage (for e.g. ACLs), this will be done later. Originally written by Kirk McKusick and Network Associates Laboratories for FreeBSD.
268 lines
6.8 KiB
C
268 lines
6.8 KiB
C
/* $NetBSD: badsect.c,v 1.22 2003/04/02 10:39:22 fvdl Exp $ */
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/*
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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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) 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 char sccsid[] = "@(#)badsect.c 8.2 (Berkeley) 5/4/95";
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#else
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__RCSID("$NetBSD: badsect.c,v 1.22 2003/04/02 10:39:22 fvdl Exp $");
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#endif
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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/dir.h>
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#include <sys/stat.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ufs/ufs_bswap.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.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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#include <err.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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int needswap = 0;
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int is_ufs2;
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char buf[MAXBSIZE];
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void rdfs __P((daddr_t, int, char *));
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int chkuse __P((daddr_t, int));
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int main __P((int, char *[]));
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const off_t sblock_try[] = SBLOCKSEARCH;
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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daddr_t number;
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struct stat stbuf, devstat;
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struct direct *dp;
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int i;
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DIR *dirp;
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char name[MAXPATHLEN];
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if (argc < 3) {
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(void) fprintf(stderr, "Usage: %s bbdir blkno [ blkno ]\n",
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getprogname());
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exit(1);
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}
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if (chdir(argv[1]) == -1)
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err(1, "Cannot change directory to `%s'", argv[1]);
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if (stat(".", &stbuf) == -1)
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err(1, "Cannot stat `%s'", argv[1]);
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(void) strcpy(name, _PATH_DEV);
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if ((dirp = opendir(name)) == NULL)
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err(1, "Cannot opendir `%s'", argv[1]);
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while ((dp = readdir(dirp)) != NULL) {
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(void) snprintf(name, sizeof(name), "%s%s", _PATH_DEV,
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dp->d_name);
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if (stat(name, &devstat) == -1)
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err(1, "Cannot stat `%s'", name);
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if (stbuf.st_dev == devstat.st_rdev &&
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S_ISBLK(devstat.st_mode))
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break;
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}
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if (dp == NULL) {
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closedir(dirp);
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errx(1, "Cannot find dev 0%o corresponding to %s",
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stbuf.st_rdev, argv[1]);
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}
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/*
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* The filesystem is mounted; use the character device instead.
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* XXX - Assume that prepending an `r' will give us the name of
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* the character device.
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*/
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(void) snprintf(name, sizeof(name), "%sr%s", _PATH_DEV, dp->d_name);
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closedir(dirp); /* now *dp is invalid */
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if ((fsi = open(name, O_RDONLY)) == -1)
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err(1, "Cannot open `%s'", argv[1]);
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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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switch (fs->fs_magic) {
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case FS_UFS2_MAGIC:
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is_ufs2 = 1;
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/* FALLTHROUGH */
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case FS_UFS1_MAGIC:
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goto found;
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case FS_UFS2_MAGIC_SWAPPED:
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is_ufs2 = 1;
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/* FALLTHROUGH */
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case FS_UFS1_MAGIC_SWAPPED:
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needswap = 1;
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goto found;
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default:
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continue;
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}
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}
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errx(1, "%s: bad superblock", name);
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found:
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if (needswap)
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ffs_sb_swap(fs, fs);
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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 = atoi(*argv);
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if (chkuse(number, 1))
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continue;
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if (mknod(*argv, S_IFMT|S_IRUSR|S_IWUSR,
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dbtofsb(fs, number)) == -1) {
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warn("Cannot mknod `%s'", *argv);
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errs++;
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}
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}
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warnx("Don't forget to run ``fsck %s''", name);
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return errs;
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}
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int
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chkuse(blkno, cnt)
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daddr_t blkno;
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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 (fsbn+cnt > fs->fs_size) {
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warnx("block %lld out of range of file system",
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(long 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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warnx("block %lld in non-data area: cannot attach",
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(long 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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warnx("block %lld in non-data area: cannot attach",
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(long 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, needswap)) {
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warnx("cg %d: bad magic number", 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, needswap), bn))
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warnx("Warning: sector %lld is in use", (long 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(bno, size, bf)
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daddr_t bno;
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int size;
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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) == -1)
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err(1, "seek error at block %lld", (long long)bno);
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switch (n = read(fsi, bf, size)) {
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case -1:
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err(1, "read error at block %lld", (long long)bno);
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break;
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default:
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if (n == size)
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return;
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errx(1, "incomplete read at block %lld", (long long)bno);
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}
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}
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