badsect.c revision 78732
11558Srgrimes/* 21558Srgrimes * Copyright (c) 1981, 1983, 1993 31558Srgrimes * The Regents of the University of California. All rights reserved. 41558Srgrimes * 51558Srgrimes * Redistribution and use in source and binary forms, with or without 61558Srgrimes * modification, are permitted provided that the following conditions 71558Srgrimes * are met: 81558Srgrimes * 1. Redistributions of source code must retain the above copyright 91558Srgrimes * notice, this list of conditions and the following disclaimer. 101558Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111558Srgrimes * notice, this list of conditions and the following disclaimer in the 121558Srgrimes * documentation and/or other materials provided with the distribution. 131558Srgrimes * 3. All advertising materials mentioning features or use of this software 141558Srgrimes * must display the following acknowledgement: 151558Srgrimes * This product includes software developed by the University of 161558Srgrimes * California, Berkeley and its contributors. 171558Srgrimes * 4. Neither the name of the University nor the names of its contributors 181558Srgrimes * may be used to endorse or promote products derived from this software 191558Srgrimes * without specific prior written permission. 201558Srgrimes * 211558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311558Srgrimes * SUCH DAMAGE. 321558Srgrimes */ 331558Srgrimes 341558Srgrimes#ifndef lint 357590Sbdestatic const char copyright[] = 361558Srgrimes"@(#) Copyright (c) 1981, 1983, 1993\n\ 371558Srgrimes The Regents of the University of California. All rights reserved.\n"; 381558Srgrimes#endif /* not lint */ 391558Srgrimes 401558Srgrimes#ifndef lint 4136626Scharnier#if 0 427590Sbdestatic const char sccsid[] = "@(#)badsect.c 8.1 (Berkeley) 6/5/93"; 4336626Scharnier#endif 4436626Scharnierstatic const char rcsid[] = 4550476Speter "$FreeBSD: head/sbin/badsect/badsect.c 78732 2001-06-24 23:04:23Z dd $"; 461558Srgrimes#endif /* not lint */ 471558Srgrimes 481558Srgrimes/* 491558Srgrimes * badsect 501558Srgrimes * 511558Srgrimes * Badsect takes a list of file-system relative sector numbers 521558Srgrimes * and makes files containing the blocks of which these sectors are a part. 531558Srgrimes * It can be used to contain sectors which have problems if these sectors 541558Srgrimes * are not part of the bad file for the pack (see bad144). For instance, 551558Srgrimes * this program can be used if the driver for the file system in question 561558Srgrimes * does not support bad block forwarding. 571558Srgrimes */ 581558Srgrimes#include <sys/param.h> 591558Srgrimes#include <sys/stat.h> 601558Srgrimes 611558Srgrimes#include <ufs/ffs/fs.h> 621558Srgrimes#include <ufs/ufs/dinode.h> 631558Srgrimes 6436626Scharnier#include <err.h> 6518485Sbde#include <dirent.h> 661558Srgrimes#include <fcntl.h> 671558Srgrimes#include <paths.h> 681558Srgrimes#include <stdio.h> 691558Srgrimes#include <stdlib.h> 7078732Sdd#include <string.h> 711558Srgrimes#include <unistd.h> 721558Srgrimes 731558Srgrimesunion { 741558Srgrimes struct fs fs; 751558Srgrimes char fsx[SBSIZE]; 761558Srgrimes} ufs; 771558Srgrimes#define sblock ufs.fs 781558Srgrimesunion { 791558Srgrimes struct cg cg; 801558Srgrimes char cgx[MAXBSIZE]; 811558Srgrimes} ucg; 821558Srgrimes#define acg ucg.cg 831558Srgrimesstruct fs *fs; 841558Srgrimesint fso, fsi; 851558Srgrimesint errs; 861558Srgrimeslong dev_bsize = 1; 871558Srgrimes 881558Srgrimeschar buf[MAXBSIZE]; 891558Srgrimes 901558Srgrimesvoid rdfs __P((daddr_t, int, char *)); 911558Srgrimesint chkuse __P((daddr_t, int)); 921558Srgrimes 9336626Scharnierstatic void 9436626Scharnierusage(void) 9536626Scharnier{ 9636626Scharnier fprintf(stderr, "usage: badsect bbdir blkno ...\n"); 9736626Scharnier exit(1); 9836626Scharnier} 9936626Scharnier 1001558Srgrimesint 1011558Srgrimesmain(argc, argv) 1021558Srgrimes int argc; 1031558Srgrimes char *argv[]; 1041558Srgrimes{ 1057589Sbde daddr_t diskbn; 1061558Srgrimes daddr_t number; 1071558Srgrimes struct stat stbuf, devstat; 10818485Sbde register struct dirent *dp; 1091558Srgrimes DIR *dirp; 1107589Sbde char name[2 * MAXPATHLEN]; 1117589Sbde char *name_dir_end; 1121558Srgrimes 11336626Scharnier if (argc < 3) 11436626Scharnier usage(); 11536626Scharnier if (chdir(argv[1]) < 0 || stat(".", &stbuf) < 0) 11636626Scharnier err(2, "%s", argv[1]); 1171558Srgrimes strcpy(name, _PATH_DEV); 11836626Scharnier if ((dirp = opendir(name)) == NULL) 11936626Scharnier err(3, "%s", name); 1207589Sbde name_dir_end = name + strlen(name); 1211558Srgrimes while ((dp = readdir(dirp)) != NULL) { 1227589Sbde strcpy(name_dir_end, dp->d_name); 12336626Scharnier if (lstat(name, &devstat) < 0) 12436626Scharnier err(4, "%s", name); 1251558Srgrimes if (stbuf.st_dev == devstat.st_rdev && 12668521Sadrian (devstat.st_mode & IFMT) == IFCHR) 1271558Srgrimes break; 1281558Srgrimes } 1291558Srgrimes closedir(dirp); 1301558Srgrimes if (dp == NULL) { 1317590Sbde printf("Cannot find dev 0%lo corresponding to %s\n", 13237233Sbde (u_long)stbuf.st_rdev, argv[1]); 1331558Srgrimes exit(5); 1341558Srgrimes } 13536626Scharnier if ((fsi = open(name, O_RDONLY)) < 0) 13636626Scharnier err(6, "%s", name); 1371558Srgrimes fs = &sblock; 1381558Srgrimes rdfs(SBOFF, SBSIZE, (char *)fs); 1391558Srgrimes dev_bsize = fs->fs_fsize / fsbtodb(fs, 1); 1401558Srgrimes for (argc -= 2, argv += 2; argc > 0; argc--, argv++) { 1417589Sbde number = atol(*argv); 1421558Srgrimes if (chkuse(number, 1)) 1431558Srgrimes continue; 1447589Sbde /* 1457589Sbde * Print a warning if converting the block number to a dev_t 1467589Sbde * will truncate it. badsect was not very useful in versions 1477589Sbde * of BSD before 4.4 because dev_t was 16 bits and another 1487589Sbde * bit was lost by bogus sign extensions. 1497589Sbde */ 1507589Sbde diskbn = dbtofsb(fs, number); 1517589Sbde if ((dev_t)diskbn != diskbn) { 1527590Sbde printf("sector %ld cannot be represented as a dev_t\n", 15337233Sbde (long)number); 1547589Sbde errs++; 1557589Sbde } 1567589Sbde else if (mknod(*argv, IFMT|0600, (dev_t)diskbn) < 0) { 15736626Scharnier warn("%s", *argv); 1581558Srgrimes errs++; 1591558Srgrimes } 1601558Srgrimes } 1611558Srgrimes printf("Don't forget to run ``fsck %s''\n", name); 1621558Srgrimes exit(errs); 1631558Srgrimes} 1641558Srgrimes 1651558Srgrimesint 1661558Srgrimeschkuse(blkno, cnt) 1671558Srgrimes daddr_t blkno; 1681558Srgrimes int cnt; 1691558Srgrimes{ 1701558Srgrimes int cg; 1711558Srgrimes daddr_t fsbn, bn; 1721558Srgrimes 1731558Srgrimes fsbn = dbtofsb(fs, blkno); 1741558Srgrimes if ((unsigned)(fsbn+cnt) > fs->fs_size) { 17537233Sbde printf("block %ld out of range of file system\n", (long)blkno); 1761558Srgrimes return (1); 1771558Srgrimes } 1781558Srgrimes cg = dtog(fs, fsbn); 1791558Srgrimes if (fsbn < cgdmin(fs, cg)) { 1801558Srgrimes if (cg == 0 || (fsbn+cnt) > cgsblock(fs, cg)) { 1817590Sbde printf("block %ld in non-data area: cannot attach\n", 18237233Sbde (long)blkno); 1831558Srgrimes return (1); 1841558Srgrimes } 1851558Srgrimes } else { 1861558Srgrimes if ((fsbn+cnt) > cgbase(fs, cg+1)) { 1877590Sbde printf("block %ld in non-data area: cannot attach\n", 18837233Sbde (long)blkno); 1891558Srgrimes return (1); 1901558Srgrimes } 1911558Srgrimes } 1921558Srgrimes rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)sblock.fs_cgsize, 1931558Srgrimes (char *)&acg); 1941558Srgrimes if (!cg_chkmagic(&acg)) { 1951558Srgrimes fprintf(stderr, "cg %d: bad magic number\n", cg); 1961558Srgrimes errs++; 1971558Srgrimes return (1); 1981558Srgrimes } 1991558Srgrimes bn = dtogd(fs, fsbn); 2001558Srgrimes if (isclr(cg_blksfree(&acg), bn)) 20137233Sbde printf("Warning: sector %ld is in use\n", (long)blkno); 2021558Srgrimes return (0); 2031558Srgrimes} 2041558Srgrimes 2051558Srgrimes/* 2061558Srgrimes * read a block from the file system 2071558Srgrimes */ 2081558Srgrimesvoid 2091558Srgrimesrdfs(bno, size, bf) 2101558Srgrimes daddr_t bno; 2111558Srgrimes int size; 2121558Srgrimes char *bf; 2131558Srgrimes{ 2141558Srgrimes int n; 2151558Srgrimes 2161558Srgrimes if (lseek(fsi, (off_t)bno * dev_bsize, SEEK_SET) < 0) { 21737233Sbde printf("seek error: %ld\n", (long)bno); 21836626Scharnier err(1, "rdfs"); 2191558Srgrimes } 2201558Srgrimes n = read(fsi, bf, size); 2211558Srgrimes if (n != size) { 22237233Sbde printf("read error: %ld\n", (long)bno); 22336626Scharnier err(1, "rdfs"); 2241558Srgrimes } 2251558Srgrimes} 226