setup.c revision 74556
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 74556 2001-03-21 09:48:03Z mckusick $"; 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)); 8974556Smckusick if (bkgrdflag) { 9074556Smckusick unlink(snapname); 9174556Smckusick bkgrdflag = 0; 9274556Smckusick } 931558Srgrimes return (0); 941558Srgrimes } 9553781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9653781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9774556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9874556Smckusick unlink(snapname); 9974556Smckusick printf("background fsck lacks a snapshot\n"); 10074556Smckusick exit(EEXIT); 10174556Smckusick } 10274556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 10362668Smckusick cursnapshot = statb.st_ino; 10462668Smckusick } else { 10574556Smckusick if (cvtlevel == 0 || 10674556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10774556Smckusick if (preen && bkgrdflag) { 10874556Smckusick unlink(snapname); 10974556Smckusick bkgrdflag = 0; 11074556Smckusick } 11174556Smckusick pfatal("%s is not a disk device", dev); 11274556Smckusick if (reply("CONTINUE") == 0) { 11374556Smckusick if (bkgrdflag) { 11474556Smckusick unlink(snapname); 11574556Smckusick bkgrdflag = 0; 11674556Smckusick } 11774556Smckusick return (0); 11874556Smckusick } 11974556Smckusick } else { 12074556Smckusick if (bkgrdflag) { 12174556Smckusick unlink(snapname); 12274556Smckusick bkgrdflag = 0; 12374556Smckusick } 12474556Smckusick pfatal("cannot convert a snapshot"); 12574556Smckusick exit(EEXIT); 12674556Smckusick } 12762668Smckusick } 1281558Srgrimes } 1291558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 13074556Smckusick if (bkgrdflag) { 13174556Smckusick unlink(snapname); 13274556Smckusick bkgrdflag = 0; 13374556Smckusick } 1341558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1351558Srgrimes return (0); 1361558Srgrimes } 13774556Smckusick if (bkgrdflag) { 13874556Smckusick unlink(snapname); 13974556Smckusick size = MIBSIZE; 14074556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 14174556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 14274556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 14374556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 14474556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14574556Smckusick pfatal("kernel lacks background fsck support\n"); 14674556Smckusick exit(EEXIT); 14774556Smckusick } 14874556Smckusick cmd.version = FFS_CMD_VERSION; 14974556Smckusick cmd.handle = fsreadfd; 15074556Smckusick fswritefd = -1; 15174556Smckusick } 1521558Srgrimes if (preen == 0) 1531558Srgrimes printf("** %s", dev); 15474556Smckusick if (bkgrdflag == 0 && 15574556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1561558Srgrimes fswritefd = -1; 1571558Srgrimes if (preen) 1581558Srgrimes pfatal("NO WRITE ACCESS"); 1591558Srgrimes printf(" (NO WRITE)"); 1601558Srgrimes } 1611558Srgrimes if (preen == 0) 1621558Srgrimes printf("\n"); 1631558Srgrimes fsmodified = 0; 1641558Srgrimes lfdir = 0; 1651558Srgrimes initbarea(&sblk); 1661558Srgrimes initbarea(&asblk); 1671558Srgrimes sblk.b_un.b_buf = malloc(SBSIZE); 1681558Srgrimes asblk.b_un.b_buf = malloc(SBSIZE); 1691558Srgrimes if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 17023675Speter errx(EEXIT, "cannot allocate space for superblock"); 17141474Sjulian if ((lp = getdisklabel(NULL, fsreadfd))) 1721558Srgrimes dev_bsize = secsize = lp->d_secsize; 1731558Srgrimes else 1741558Srgrimes dev_bsize = secsize = DEV_BSIZE; 1751558Srgrimes /* 1761558Srgrimes * Read in the superblock, looking for alternates if necessary 1771558Srgrimes */ 1781558Srgrimes if (readsb(1) == 0) { 17923675Speter skipclean = 0; 1801558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1811558Srgrimes return(0); 1821558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1831558Srgrimes return (0); 1841558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1851558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1861558Srgrimes if (readsb(0) != 0) 1871558Srgrimes break; 1881558Srgrimes } 1891558Srgrimes if (cg >= proto.fs_ncg) { 1901558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1911558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1921558Srgrimes "FAILED. YOU MUST USE THE", 1931558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1941558Srgrimes "LOCATION OF AN ALTERNATE", 1951558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1961558Srgrimes "INFORMATION; SEE fsck(8)."); 1976280Sbde bflag = 0; 1981558Srgrimes return(0); 1991558Srgrimes } 2001558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 2016280Sbde bflag = 0; 2021558Srgrimes } 20341474Sjulian if (skipclean && sblock.fs_clean) { 20441474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 20541474Sjulian return (-1); 20641474Sjulian } 2071558Srgrimes maxfsblock = sblock.fs_size; 2081558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 2091558Srgrimes /* 2101558Srgrimes * Check and potentially fix certain fields in the super block. 2111558Srgrimes */ 2121558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 2131558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 2141558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2151558Srgrimes sblock.fs_optim = FS_OPTTIME; 2161558Srgrimes sbdirty(); 2171558Srgrimes } 2181558Srgrimes } 2191558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2201558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2211558Srgrimes sblock.fs_minfree); 2221558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2231558Srgrimes sblock.fs_minfree = 10; 2241558Srgrimes sbdirty(); 2251558Srgrimes } 2261558Srgrimes } 2278871Srgrimes if (sblock.fs_interleave < 1 || 2281558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 22974556Smckusick pfatal("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 2301558Srgrimes sblock.fs_interleave); 2311558Srgrimes sblock.fs_interleave = 1; 2321558Srgrimes if (preen) 2331558Srgrimes printf(" (FIXED)\n"); 2341558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 2351558Srgrimes sbdirty(); 2361558Srgrimes dirty(&asblk); 2371558Srgrimes } 2381558Srgrimes } 2398871Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 2401558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 24174556Smckusick pfatal("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 2421558Srgrimes sblock.fs_npsect); 2431558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 2441558Srgrimes if (preen) 2451558Srgrimes printf(" (FIXED)\n"); 2461558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 2471558Srgrimes sbdirty(); 2481558Srgrimes dirty(&asblk); 2491558Srgrimes } 2501558Srgrimes } 2511558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 2521558Srgrimes newinofmt = 1; 2531558Srgrimes } else { 2541558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2551558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 25671884Siedowse /* This should match the kernel limit in ffs_oldfscompat(). */ 25771884Siedowse sblock.fs_maxfilesize = (u_int64_t)1 << 39; 2581558Srgrimes newinofmt = 0; 2591558Srgrimes } 2601558Srgrimes /* 2611558Srgrimes * Convert to new inode format. 2621558Srgrimes */ 2631558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 2641558Srgrimes if (preen) 2651558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 2661558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 2671558Srgrimes return(0); 2681558Srgrimes doinglevel2++; 2691558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 2701558Srgrimes sizepb = sblock.fs_bsize; 2711558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2721558Srgrimes for (i = 0; i < NIADDR; i++) { 2731558Srgrimes sizepb *= NINDIR(&sblock); 2741558Srgrimes sblock.fs_maxfilesize += sizepb; 2751558Srgrimes } 2761558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2771558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2781558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2791558Srgrimes sbdirty(); 2801558Srgrimes dirty(&asblk); 2811558Srgrimes } 2821558Srgrimes /* 2831558Srgrimes * Convert to new cylinder group format. 2841558Srgrimes */ 2851558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2861558Srgrimes if (preen) 2871558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2881558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2891558Srgrimes return(0); 2901558Srgrimes doinglevel1++; 2911558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2921558Srgrimes sblock.fs_nrpos = 8; 2931558Srgrimes sblock.fs_postbloff = 2941558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 29523675Speter (char *)(&sblock.fs_firstfield); 2961558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 29723675Speter (u_char *)(&sblock.fs_firstfield); 2981558Srgrimes sblock.fs_cgsize = 2991558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 3001558Srgrimes sbdirty(); 3011558Srgrimes dirty(&asblk); 3021558Srgrimes } 30323675Speter if (asblk.b_dirty && !bflag) { 30423675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 3051558Srgrimes flush(fswritefd, &asblk); 3061558Srgrimes } 3071558Srgrimes /* 3081558Srgrimes * read in the summary info. 3091558Srgrimes */ 3101558Srgrimes asked = 0; 31171073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 3121558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 3131558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 3141558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 31571073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 3161558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 3171558Srgrimes size) != 0 && !asked) { 3181558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 31934266Sjulian if (reply("CONTINUE") == 0) { 32034266Sjulian ckfini(0); 32123675Speter exit(EEXIT); 32234266Sjulian } 3231558Srgrimes asked++; 3241558Srgrimes } 3251558Srgrimes } 3261558Srgrimes /* 3271558Srgrimes * allocate and initialize the necessary maps 3281558Srgrimes */ 3291558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 3301558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 3311558Srgrimes if (blockmap == NULL) { 3321558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 3331558Srgrimes (unsigned)bmapsize); 3341558Srgrimes goto badsb; 3351558Srgrimes } 33641474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 33741474Sjulian sizeof(struct inostatlist)); 33841474Sjulian if (inostathead == NULL) { 33941474Sjulian printf("cannot alloc %u bytes for inostathead\n", 34041474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 3411558Srgrimes goto badsb; 3421558Srgrimes } 3431558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 34457573Smckusick dirhash = numdirs; 34534033Sphk if (numdirs == 0) { 34634033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 34734033Sphk goto badsb; 34834033Sphk } 3491558Srgrimes inplast = 0; 3501558Srgrimes listmax = numdirs + 10; 3511558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 3521558Srgrimes sizeof(struct inoinfo *)); 3531558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 3541558Srgrimes sizeof(struct inoinfo *)); 3551558Srgrimes if (inpsort == NULL || inphead == NULL) { 3568871Srgrimes printf("cannot alloc %u bytes for inphead\n", 3571558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 3581558Srgrimes goto badsb; 3591558Srgrimes } 3601558Srgrimes bufinit(); 36134266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 36234266Sjulian usedsoftdep = 1; 36334266Sjulian else 36434266Sjulian usedsoftdep = 0; 3651558Srgrimes return (1); 3661558Srgrimes 3671558Srgrimesbadsb: 36823675Speter ckfini(0); 3691558Srgrimes return (0); 3701558Srgrimes} 3711558Srgrimes 3721558Srgrimes/* 3731558Srgrimes * Read in the super block and its summary info. 3741558Srgrimes */ 3757585Sbdestatic int 3761558Srgrimesreadsb(listerr) 3771558Srgrimes int listerr; 3781558Srgrimes{ 37923675Speter ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3801558Srgrimes 3811558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3821558Srgrimes return (0); 3831558Srgrimes sblk.b_bno = super; 3841558Srgrimes sblk.b_size = SBSIZE; 3851558Srgrimes /* 3861558Srgrimes * run a few consistency checks of the super block 3871558Srgrimes */ 3881558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3891558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3901558Srgrimes if (sblock.fs_ncg < 1) 3911558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3921558Srgrimes if (sblock.fs_cpg < 1) 3931558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3941558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3951558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3961558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3971558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3981558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3991558Srgrimes /* 4001558Srgrimes * Compute block size that the filesystem is based on, 4011558Srgrimes * according to fsbtodb, and adjust superblock block number 4021558Srgrimes * so we can tell if this is an alternate later. 4031558Srgrimes */ 4041558Srgrimes super *= dev_bsize; 4051558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 4061558Srgrimes sblk.b_bno = super / dev_bsize; 4071558Srgrimes if (bflag) { 4081558Srgrimes havesb = 1; 4091558Srgrimes return (1); 4101558Srgrimes } 4111558Srgrimes /* 4121558Srgrimes * Set all possible fields that could differ, then do check 4131558Srgrimes * of whole super block against an alternate super block. 4141558Srgrimes * When an alternate super-block is specified this check is skipped. 4151558Srgrimes */ 4161558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 4171558Srgrimes if (asblk.b_errs) 4181558Srgrimes return (0); 41923675Speter altsblock.fs_firstfield = sblock.fs_firstfield; 42023675Speter altsblock.fs_unused_1 = sblock.fs_unused_1; 4211558Srgrimes altsblock.fs_time = sblock.fs_time; 4221558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 4231558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 4241558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 4251558Srgrimes altsblock.fs_clean = sblock.fs_clean; 4261558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 4271558Srgrimes altsblock.fs_flags = sblock.fs_flags; 4281558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 4291558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 4301558Srgrimes altsblock.fs_optim = sblock.fs_optim; 4311558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 4321558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 43371073Siedowse memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 43471073Siedowse altsblock.fs_csp = sblock.fs_csp; 43523675Speter altsblock.fs_maxcluster = sblock.fs_maxcluster; 43623675Speter memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 43762668Smckusick memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 43862668Smckusick sizeof sblock.fs_snapinum); 43923675Speter memmove(altsblock.fs_sparecon, 44023675Speter sblock.fs_sparecon, sizeof sblock.fs_sparecon); 4411558Srgrimes /* 4421558Srgrimes * The following should not have to be copied. 4431558Srgrimes */ 4441558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 4451558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 4461558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 4471558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 44823675Speter altsblock.fs_state = sblock.fs_state; 4491558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 4501558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 4511558Srgrimes altsblock.fs_state = sblock.fs_state; 4521558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 45323675Speter if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 45423675Speter if (debug) { 45523675Speter long *nlp, *olp, *endlp; 45623675Speter 45723675Speter printf("superblock mismatches\n"); 45823675Speter nlp = (long *)&altsblock; 45923675Speter olp = (long *)&sblock; 46023675Speter endlp = olp + (sblock.fs_sbsize / sizeof *olp); 46123675Speter for ( ; olp < endlp; olp++, nlp++) { 46223675Speter if (*olp == *nlp) 46323675Speter continue; 46437236Sbde printf( 46537236Sbde "offset %d, original %ld, alternate %ld\n", 46623675Speter olp - (long *)&sblock, *olp, *nlp); 46723675Speter } 46823675Speter } 4691558Srgrimes badsb(listerr, 4701558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 4711558Srgrimes return (0); 4721558Srgrimes } 4731558Srgrimes havesb = 1; 4741558Srgrimes return (1); 4751558Srgrimes} 4761558Srgrimes 4777585Sbdestatic void 4781558Srgrimesbadsb(listerr, s) 4791558Srgrimes int listerr; 4801558Srgrimes char *s; 4811558Srgrimes{ 4821558Srgrimes 4831558Srgrimes if (!listerr) 4841558Srgrimes return; 4851558Srgrimes if (preen) 4861558Srgrimes printf("%s: ", cdevname); 4871558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4881558Srgrimes} 4891558Srgrimes 4901558Srgrimes/* 4911558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4921558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4931558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4941558Srgrimes * their needed information is available! 4951558Srgrimes */ 49623675Speterstatic int 4971558Srgrimescalcsb(dev, devfd, fs) 4981558Srgrimes char *dev; 4991558Srgrimes int devfd; 5001558Srgrimes register struct fs *fs; 5011558Srgrimes{ 5021558Srgrimes register struct disklabel *lp; 5031558Srgrimes register struct partition *pp; 5041558Srgrimes register char *cp; 5051558Srgrimes int i; 5061558Srgrimes 50723675Speter cp = strchr(dev, '\0') - 1; 5087585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 5091558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 5101558Srgrimes return (0); 5111558Srgrimes } 5121558Srgrimes lp = getdisklabel(dev, devfd); 5131558Srgrimes if (isdigit(*cp)) 5141558Srgrimes pp = &lp->d_partitions[0]; 5151558Srgrimes else 5161558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 5171558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 5181558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 5191558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 5201558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 5211558Srgrimes return (0); 5221558Srgrimes } 52341474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 52441474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 52541474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 52641474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 52741474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 52832622Sbde return (0); 52932622Sbde } 53023675Speter memset(fs, 0, sizeof(struct fs)); 5311558Srgrimes fs->fs_fsize = pp->p_fsize; 5321558Srgrimes fs->fs_frag = pp->p_frag; 5331558Srgrimes fs->fs_cpg = pp->p_cpg; 5341558Srgrimes fs->fs_size = pp->p_size; 5351558Srgrimes fs->fs_ntrak = lp->d_ntracks; 5361558Srgrimes fs->fs_nsect = lp->d_nsectors; 5371558Srgrimes fs->fs_spc = lp->d_secpercyl; 5381558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 5391558Srgrimes fs->fs_sblkno = roundup( 5401558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 5411558Srgrimes fs->fs_frag); 5421558Srgrimes fs->fs_cgmask = 0xffffffff; 5431558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 5441558Srgrimes fs->fs_cgmask <<= 1; 5451558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 5461558Srgrimes fs->fs_cgmask <<= 1; 5471558Srgrimes fs->fs_cgoffset = roundup( 5481558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 5491558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 5501558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 5511558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 5521558Srgrimes fs->fs_fsbtodb++; 5531558Srgrimes dev_bsize = lp->d_secsize; 5541558Srgrimes return (1); 5551558Srgrimes} 5561558Srgrimes 55723675Speterstatic struct disklabel * 5581558Srgrimesgetdisklabel(s, fd) 5591558Srgrimes char *s; 5601558Srgrimes int fd; 5611558Srgrimes{ 5621558Srgrimes static struct disklabel lab; 5631558Srgrimes 5641558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 5651558Srgrimes if (s == NULL) 5661558Srgrimes return ((struct disklabel *)NULL); 5671558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 56823675Speter errx(EEXIT, "%s: can't read disk label", s); 5691558Srgrimes } 5701558Srgrimes return (&lab); 5711558Srgrimes} 572