setup.c revision 71073
11558Srgrimes/* 21558Srgrimes * Copyright (c) 1980, 1986, 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 3541477Sjulian#if 0 3623675Speterstatic const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 3741477Sjulian#endif 3841477Sjulianstatic const char rcsid[] = 3950476Speter "$FreeBSD: head/sbin/fsck_ffs/setup.c 71073 2001-01-15 18:30:40Z iedowse $"; 401558Srgrimes#endif /* not lint */ 411558Srgrimes 421558Srgrimes#define DKTYPENAMES 431558Srgrimes#include <sys/param.h> 441558Srgrimes#include <sys/stat.h> 451558Srgrimes#include <sys/disklabel.h> 461558Srgrimes#include <sys/file.h> 4723675Speter 4823675Speter#include <ufs/ufs/dinode.h> 4923675Speter#include <ufs/ffs/fs.h> 5023675Speter 5123675Speter#include <ctype.h> 5223675Speter#include <err.h> 531558Srgrimes#include <errno.h> 541558Srgrimes#include <string.h> 5523675Speter 561558Srgrimes#include "fsck.h" 571558Srgrimes 581558Srgrimesstruct bufarea asblk; 591558Srgrimes#define altsblock (*asblk.b_un.b_fs) 601558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 611558Srgrimes 6223675Speterstatic void badsb __P((int listerr, char *s)); 6323675Speterstatic int calcsb __P((char *dev, int devfd, struct fs *fs)); 6423675Speterstatic struct disklabel *getdisklabel __P((char *s, int fd)); 6523675Speterstatic int readsb __P((int listerr)); 661558Srgrimes 6723675Speter/* 6823675Speter * Read in a superblock finding an alternate if necessary. 6923675Speter * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 7023675Speter * is already clean (preen mode only). 7123675Speter */ 727585Sbdeint 731558Srgrimessetup(dev) 741558Srgrimes char *dev; 751558Srgrimes{ 761558Srgrimes long cg, size, asked, i, j; 7723675Speter long skipclean, bmapsize; 781558Srgrimes struct disklabel *lp; 791558Srgrimes off_t sizepb; 801558Srgrimes struct stat statb; 811558Srgrimes struct fs proto; 821558Srgrimes 831558Srgrimes havesb = 0; 841558Srgrimes fswritefd = -1; 8562668Smckusick cursnapshot = 0; 8641474Sjulian skipclean = fflag ? 0 : preen; 871558Srgrimes if (stat(dev, &statb) < 0) { 881558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 891558Srgrimes return (0); 901558Srgrimes } 9153781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9253781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9362668Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0) { 9462668Smckusick cursnapshot = statb.st_ino; 9562668Smckusick } else { 9662668Smckusick pfatal("%s is not a disk device", dev); 9762668Smckusick if (reply("CONTINUE") == 0) 9862668Smckusick return (0); 9962668Smckusick } 1001558Srgrimes } 1011558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 1021558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1031558Srgrimes return (0); 1041558Srgrimes } 1051558Srgrimes if (preen == 0) 1061558Srgrimes printf("** %s", dev); 1071558Srgrimes if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 1081558Srgrimes fswritefd = -1; 1091558Srgrimes if (preen) 1101558Srgrimes pfatal("NO WRITE ACCESS"); 1111558Srgrimes printf(" (NO WRITE)"); 1121558Srgrimes } 1131558Srgrimes if (preen == 0) 1141558Srgrimes printf("\n"); 1151558Srgrimes fsmodified = 0; 1161558Srgrimes lfdir = 0; 1171558Srgrimes initbarea(&sblk); 1181558Srgrimes initbarea(&asblk); 1191558Srgrimes sblk.b_un.b_buf = malloc(SBSIZE); 1201558Srgrimes asblk.b_un.b_buf = malloc(SBSIZE); 1211558Srgrimes if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 12223675Speter errx(EEXIT, "cannot allocate space for superblock"); 12341474Sjulian if ((lp = getdisklabel(NULL, fsreadfd))) 1241558Srgrimes dev_bsize = secsize = lp->d_secsize; 1251558Srgrimes else 1261558Srgrimes dev_bsize = secsize = DEV_BSIZE; 1271558Srgrimes /* 1281558Srgrimes * Read in the superblock, looking for alternates if necessary 1291558Srgrimes */ 1301558Srgrimes if (readsb(1) == 0) { 13123675Speter skipclean = 0; 1321558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1331558Srgrimes return(0); 1341558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1351558Srgrimes return (0); 1361558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1371558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1381558Srgrimes if (readsb(0) != 0) 1391558Srgrimes break; 1401558Srgrimes } 1411558Srgrimes if (cg >= proto.fs_ncg) { 1421558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1431558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1441558Srgrimes "FAILED. YOU MUST USE THE", 1451558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1461558Srgrimes "LOCATION OF AN ALTERNATE", 1471558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1481558Srgrimes "INFORMATION; SEE fsck(8)."); 1496280Sbde bflag = 0; 1501558Srgrimes return(0); 1511558Srgrimes } 1521558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1536280Sbde bflag = 0; 1541558Srgrimes } 15541474Sjulian if (skipclean && sblock.fs_clean) { 15641474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 15741474Sjulian return (-1); 15841474Sjulian } 1591558Srgrimes maxfsblock = sblock.fs_size; 1601558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1611558Srgrimes /* 1621558Srgrimes * Check and potentially fix certain fields in the super block. 1631558Srgrimes */ 1641558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1651558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 1661558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1671558Srgrimes sblock.fs_optim = FS_OPTTIME; 1681558Srgrimes sbdirty(); 1691558Srgrimes } 1701558Srgrimes } 1711558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 1721558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 1731558Srgrimes sblock.fs_minfree); 1741558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1751558Srgrimes sblock.fs_minfree = 10; 1761558Srgrimes sbdirty(); 1771558Srgrimes } 1781558Srgrimes } 1798871Srgrimes if (sblock.fs_interleave < 1 || 1801558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 1811558Srgrimes pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 1821558Srgrimes sblock.fs_interleave); 1831558Srgrimes sblock.fs_interleave = 1; 1841558Srgrimes if (preen) 1851558Srgrimes printf(" (FIXED)\n"); 1861558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1871558Srgrimes sbdirty(); 1881558Srgrimes dirty(&asblk); 1891558Srgrimes } 1901558Srgrimes } 1918871Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 1921558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 1931558Srgrimes pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 1941558Srgrimes sblock.fs_npsect); 1951558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 1961558Srgrimes if (preen) 1971558Srgrimes printf(" (FIXED)\n"); 1981558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1991558Srgrimes sbdirty(); 2001558Srgrimes dirty(&asblk); 2011558Srgrimes } 2021558Srgrimes } 2031558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 2041558Srgrimes newinofmt = 1; 2051558Srgrimes } else { 2061558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2071558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2081558Srgrimes newinofmt = 0; 2091558Srgrimes } 2101558Srgrimes /* 2111558Srgrimes * Convert to new inode format. 2121558Srgrimes */ 2131558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 2141558Srgrimes if (preen) 2151558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 2161558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 2171558Srgrimes return(0); 2181558Srgrimes doinglevel2++; 2191558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 2201558Srgrimes sizepb = sblock.fs_bsize; 2211558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2221558Srgrimes for (i = 0; i < NIADDR; i++) { 2231558Srgrimes sizepb *= NINDIR(&sblock); 2241558Srgrimes sblock.fs_maxfilesize += sizepb; 2251558Srgrimes } 2261558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2271558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2281558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2291558Srgrimes sbdirty(); 2301558Srgrimes dirty(&asblk); 2311558Srgrimes } 2321558Srgrimes /* 2331558Srgrimes * Convert to new cylinder group format. 2341558Srgrimes */ 2351558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2361558Srgrimes if (preen) 2371558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2381558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2391558Srgrimes return(0); 2401558Srgrimes doinglevel1++; 2411558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2421558Srgrimes sblock.fs_nrpos = 8; 2431558Srgrimes sblock.fs_postbloff = 2441558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 24523675Speter (char *)(&sblock.fs_firstfield); 2461558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 24723675Speter (u_char *)(&sblock.fs_firstfield); 2481558Srgrimes sblock.fs_cgsize = 2491558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 2501558Srgrimes sbdirty(); 2511558Srgrimes dirty(&asblk); 2521558Srgrimes } 25323675Speter if (asblk.b_dirty && !bflag) { 25423675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2551558Srgrimes flush(fswritefd, &asblk); 2561558Srgrimes } 2571558Srgrimes /* 2581558Srgrimes * read in the summary info. 2591558Srgrimes */ 2601558Srgrimes asked = 0; 26171073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 2621558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2631558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2641558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 26571073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 2661558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2671558Srgrimes size) != 0 && !asked) { 2681558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 26934266Sjulian if (reply("CONTINUE") == 0) { 27034266Sjulian ckfini(0); 27123675Speter exit(EEXIT); 27234266Sjulian } 2731558Srgrimes asked++; 2741558Srgrimes } 2751558Srgrimes } 2761558Srgrimes /* 2771558Srgrimes * allocate and initialize the necessary maps 2781558Srgrimes */ 2791558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 2801558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2811558Srgrimes if (blockmap == NULL) { 2821558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2831558Srgrimes (unsigned)bmapsize); 2841558Srgrimes goto badsb; 2851558Srgrimes } 28641474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 28741474Sjulian sizeof(struct inostatlist)); 28841474Sjulian if (inostathead == NULL) { 28941474Sjulian printf("cannot alloc %u bytes for inostathead\n", 29041474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 2911558Srgrimes goto badsb; 2921558Srgrimes } 2931558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 29457573Smckusick dirhash = numdirs; 29534033Sphk if (numdirs == 0) { 29634033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 29734033Sphk goto badsb; 29834033Sphk } 2991558Srgrimes inplast = 0; 3001558Srgrimes listmax = numdirs + 10; 3011558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 3021558Srgrimes sizeof(struct inoinfo *)); 3031558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 3041558Srgrimes sizeof(struct inoinfo *)); 3051558Srgrimes if (inpsort == NULL || inphead == NULL) { 3068871Srgrimes printf("cannot alloc %u bytes for inphead\n", 3071558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 3081558Srgrimes goto badsb; 3091558Srgrimes } 3101558Srgrimes bufinit(); 31134266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 31234266Sjulian usedsoftdep = 1; 31334266Sjulian else 31434266Sjulian usedsoftdep = 0; 3151558Srgrimes return (1); 3161558Srgrimes 3171558Srgrimesbadsb: 31823675Speter ckfini(0); 3191558Srgrimes return (0); 3201558Srgrimes} 3211558Srgrimes 3221558Srgrimes/* 3231558Srgrimes * Read in the super block and its summary info. 3241558Srgrimes */ 3257585Sbdestatic int 3261558Srgrimesreadsb(listerr) 3271558Srgrimes int listerr; 3281558Srgrimes{ 32923675Speter ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3301558Srgrimes 3311558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3321558Srgrimes return (0); 3331558Srgrimes sblk.b_bno = super; 3341558Srgrimes sblk.b_size = SBSIZE; 3351558Srgrimes /* 3361558Srgrimes * run a few consistency checks of the super block 3371558Srgrimes */ 3381558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3391558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3401558Srgrimes if (sblock.fs_ncg < 1) 3411558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3421558Srgrimes if (sblock.fs_cpg < 1) 3431558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3441558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3451558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3461558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3471558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3481558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3491558Srgrimes /* 3501558Srgrimes * Compute block size that the filesystem is based on, 3511558Srgrimes * according to fsbtodb, and adjust superblock block number 3521558Srgrimes * so we can tell if this is an alternate later. 3531558Srgrimes */ 3541558Srgrimes super *= dev_bsize; 3551558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3561558Srgrimes sblk.b_bno = super / dev_bsize; 3571558Srgrimes if (bflag) { 3581558Srgrimes havesb = 1; 3591558Srgrimes return (1); 3601558Srgrimes } 3611558Srgrimes /* 3621558Srgrimes * Set all possible fields that could differ, then do check 3631558Srgrimes * of whole super block against an alternate super block. 3641558Srgrimes * When an alternate super-block is specified this check is skipped. 3651558Srgrimes */ 3661558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3671558Srgrimes if (asblk.b_errs) 3681558Srgrimes return (0); 36923675Speter altsblock.fs_firstfield = sblock.fs_firstfield; 37023675Speter altsblock.fs_unused_1 = sblock.fs_unused_1; 3711558Srgrimes altsblock.fs_time = sblock.fs_time; 3721558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 3731558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 3741558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 3751558Srgrimes altsblock.fs_clean = sblock.fs_clean; 3761558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 3771558Srgrimes altsblock.fs_flags = sblock.fs_flags; 3781558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 3791558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 3801558Srgrimes altsblock.fs_optim = sblock.fs_optim; 3811558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 3821558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 38371073Siedowse memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 38471073Siedowse altsblock.fs_csp = sblock.fs_csp; 38523675Speter altsblock.fs_maxcluster = sblock.fs_maxcluster; 38623675Speter memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 38762668Smckusick memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 38862668Smckusick sizeof sblock.fs_snapinum); 38923675Speter memmove(altsblock.fs_sparecon, 39023675Speter sblock.fs_sparecon, sizeof sblock.fs_sparecon); 3911558Srgrimes /* 3921558Srgrimes * The following should not have to be copied. 3931558Srgrimes */ 3941558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 3951558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 3961558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 3971558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 39823675Speter altsblock.fs_state = sblock.fs_state; 3991558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 4001558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 4011558Srgrimes altsblock.fs_state = sblock.fs_state; 4021558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 40323675Speter if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 40423675Speter if (debug) { 40523675Speter long *nlp, *olp, *endlp; 40623675Speter 40723675Speter printf("superblock mismatches\n"); 40823675Speter nlp = (long *)&altsblock; 40923675Speter olp = (long *)&sblock; 41023675Speter endlp = olp + (sblock.fs_sbsize / sizeof *olp); 41123675Speter for ( ; olp < endlp; olp++, nlp++) { 41223675Speter if (*olp == *nlp) 41323675Speter continue; 41437236Sbde printf( 41537236Sbde "offset %d, original %ld, alternate %ld\n", 41623675Speter olp - (long *)&sblock, *olp, *nlp); 41723675Speter } 41823675Speter } 4191558Srgrimes badsb(listerr, 4201558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 4211558Srgrimes return (0); 4221558Srgrimes } 4231558Srgrimes havesb = 1; 4241558Srgrimes return (1); 4251558Srgrimes} 4261558Srgrimes 4277585Sbdestatic void 4281558Srgrimesbadsb(listerr, s) 4291558Srgrimes int listerr; 4301558Srgrimes char *s; 4311558Srgrimes{ 4321558Srgrimes 4331558Srgrimes if (!listerr) 4341558Srgrimes return; 4351558Srgrimes if (preen) 4361558Srgrimes printf("%s: ", cdevname); 4371558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4381558Srgrimes} 4391558Srgrimes 4401558Srgrimes/* 4411558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4421558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4431558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4441558Srgrimes * their needed information is available! 4451558Srgrimes */ 44623675Speterstatic int 4471558Srgrimescalcsb(dev, devfd, fs) 4481558Srgrimes char *dev; 4491558Srgrimes int devfd; 4501558Srgrimes register struct fs *fs; 4511558Srgrimes{ 4521558Srgrimes register struct disklabel *lp; 4531558Srgrimes register struct partition *pp; 4541558Srgrimes register char *cp; 4551558Srgrimes int i; 4561558Srgrimes 45723675Speter cp = strchr(dev, '\0') - 1; 4587585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4591558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4601558Srgrimes return (0); 4611558Srgrimes } 4621558Srgrimes lp = getdisklabel(dev, devfd); 4631558Srgrimes if (isdigit(*cp)) 4641558Srgrimes pp = &lp->d_partitions[0]; 4651558Srgrimes else 4661558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4671558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4681558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4691558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4701558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4711558Srgrimes return (0); 4721558Srgrimes } 47341474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 47441474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 47541474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 47641474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 47741474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 47832622Sbde return (0); 47932622Sbde } 48023675Speter memset(fs, 0, sizeof(struct fs)); 4811558Srgrimes fs->fs_fsize = pp->p_fsize; 4821558Srgrimes fs->fs_frag = pp->p_frag; 4831558Srgrimes fs->fs_cpg = pp->p_cpg; 4841558Srgrimes fs->fs_size = pp->p_size; 4851558Srgrimes fs->fs_ntrak = lp->d_ntracks; 4861558Srgrimes fs->fs_nsect = lp->d_nsectors; 4871558Srgrimes fs->fs_spc = lp->d_secpercyl; 4881558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 4891558Srgrimes fs->fs_sblkno = roundup( 4901558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 4911558Srgrimes fs->fs_frag); 4921558Srgrimes fs->fs_cgmask = 0xffffffff; 4931558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 4941558Srgrimes fs->fs_cgmask <<= 1; 4951558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 4961558Srgrimes fs->fs_cgmask <<= 1; 4971558Srgrimes fs->fs_cgoffset = roundup( 4981558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 4991558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 5001558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 5011558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 5021558Srgrimes fs->fs_fsbtodb++; 5031558Srgrimes dev_bsize = lp->d_secsize; 5041558Srgrimes return (1); 5051558Srgrimes} 5061558Srgrimes 50723675Speterstatic struct disklabel * 5081558Srgrimesgetdisklabel(s, fd) 5091558Srgrimes char *s; 5101558Srgrimes int fd; 5111558Srgrimes{ 5121558Srgrimes static struct disklabel lab; 5131558Srgrimes 5141558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 5151558Srgrimes if (s == NULL) 5161558Srgrimes return ((struct disklabel *)NULL); 5171558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 51823675Speter errx(EEXIT, "%s: can't read disk label", s); 5191558Srgrimes } 5201558Srgrimes return (&lab); 5211558Srgrimes} 522