setup.c revision 75884
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 75884 2001-04-23 21:39:14Z 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)); 651558Srgrimes 6623675Speter/* 6723675Speter * Read in a superblock finding an alternate if necessary. 6823675Speter * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 6923675Speter * is already clean (preen mode only). 7023675Speter */ 717585Sbdeint 721558Srgrimessetup(dev) 731558Srgrimes char *dev; 741558Srgrimes{ 751558Srgrimes long cg, size, asked, i, j; 7675557Smckusick long bmapsize; 771558Srgrimes off_t sizepb; 781558Srgrimes struct stat statb; 791558Srgrimes struct fs proto; 801558Srgrimes 811558Srgrimes havesb = 0; 821558Srgrimes fswritefd = -1; 8362668Smckusick cursnapshot = 0; 841558Srgrimes if (stat(dev, &statb) < 0) { 851558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 8674556Smckusick if (bkgrdflag) { 8774556Smckusick unlink(snapname); 8874556Smckusick bkgrdflag = 0; 8974556Smckusick } 901558Srgrimes return (0); 911558Srgrimes } 9253781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9353781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9474556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9574556Smckusick unlink(snapname); 9674556Smckusick printf("background fsck lacks a snapshot\n"); 9774556Smckusick exit(EEXIT); 9874556Smckusick } 9974556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 10062668Smckusick cursnapshot = statb.st_ino; 10162668Smckusick } else { 10274556Smckusick if (cvtlevel == 0 || 10374556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10474556Smckusick if (preen && bkgrdflag) { 10574556Smckusick unlink(snapname); 10674556Smckusick bkgrdflag = 0; 10774556Smckusick } 10874556Smckusick pfatal("%s is not a disk device", dev); 10974556Smckusick if (reply("CONTINUE") == 0) { 11074556Smckusick if (bkgrdflag) { 11174556Smckusick unlink(snapname); 11274556Smckusick bkgrdflag = 0; 11374556Smckusick } 11474556Smckusick return (0); 11574556Smckusick } 11674556Smckusick } else { 11774556Smckusick if (bkgrdflag) { 11874556Smckusick unlink(snapname); 11974556Smckusick bkgrdflag = 0; 12074556Smckusick } 12174556Smckusick pfatal("cannot convert a snapshot"); 12274556Smckusick exit(EEXIT); 12374556Smckusick } 12462668Smckusick } 1251558Srgrimes } 1261558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 12774556Smckusick if (bkgrdflag) { 12874556Smckusick unlink(snapname); 12974556Smckusick bkgrdflag = 0; 13074556Smckusick } 1311558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1321558Srgrimes return (0); 1331558Srgrimes } 13474556Smckusick if (bkgrdflag) { 13574556Smckusick unlink(snapname); 13674556Smckusick size = MIBSIZE; 13774556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 13874556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 13974556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 14074556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 14174556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14274556Smckusick pfatal("kernel lacks background fsck support\n"); 14374556Smckusick exit(EEXIT); 14474556Smckusick } 14574556Smckusick cmd.version = FFS_CMD_VERSION; 14674556Smckusick cmd.handle = fsreadfd; 14774556Smckusick fswritefd = -1; 14874556Smckusick } 1491558Srgrimes if (preen == 0) 1501558Srgrimes printf("** %s", dev); 15174556Smckusick if (bkgrdflag == 0 && 15274556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1531558Srgrimes fswritefd = -1; 1541558Srgrimes if (preen) 1551558Srgrimes pfatal("NO WRITE ACCESS"); 1561558Srgrimes printf(" (NO WRITE)"); 1571558Srgrimes } 1581558Srgrimes if (preen == 0) 1591558Srgrimes printf("\n"); 1601558Srgrimes /* 1611558Srgrimes * Read in the superblock, looking for alternates if necessary 1621558Srgrimes */ 1631558Srgrimes if (readsb(1) == 0) { 16423675Speter skipclean = 0; 1651558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1661558Srgrimes return(0); 1671558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1681558Srgrimes return (0); 1691558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1701558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1711558Srgrimes if (readsb(0) != 0) 1721558Srgrimes break; 1731558Srgrimes } 1741558Srgrimes if (cg >= proto.fs_ncg) { 1751558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1761558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1771558Srgrimes "FAILED. YOU MUST USE THE", 1781558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1791558Srgrimes "LOCATION OF AN ALTERNATE", 1801558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1811558Srgrimes "INFORMATION; SEE fsck(8)."); 1826280Sbde bflag = 0; 1831558Srgrimes return(0); 1841558Srgrimes } 1851558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1866280Sbde bflag = 0; 1871558Srgrimes } 18875557Smckusick if (skipclean && preen && sblock.fs_clean) { 18941474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 19041474Sjulian return (-1); 19141474Sjulian } 1921558Srgrimes maxfsblock = sblock.fs_size; 1931558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1941558Srgrimes /* 1951558Srgrimes * Check and potentially fix certain fields in the super block. 1961558Srgrimes */ 1971558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1981558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 1991558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2001558Srgrimes sblock.fs_optim = FS_OPTTIME; 2011558Srgrimes sbdirty(); 2021558Srgrimes } 2031558Srgrimes } 2041558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2051558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2061558Srgrimes sblock.fs_minfree); 2071558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2081558Srgrimes sblock.fs_minfree = 10; 2091558Srgrimes sbdirty(); 2101558Srgrimes } 2111558Srgrimes } 2128871Srgrimes if (sblock.fs_interleave < 1 || 2131558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 21474556Smckusick pfatal("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 2151558Srgrimes sblock.fs_interleave); 2161558Srgrimes sblock.fs_interleave = 1; 2171558Srgrimes if (preen) 2181558Srgrimes printf(" (FIXED)\n"); 2191558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 2201558Srgrimes sbdirty(); 2211558Srgrimes dirty(&asblk); 2221558Srgrimes } 2231558Srgrimes } 2248871Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 2251558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 22674556Smckusick pfatal("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 2271558Srgrimes sblock.fs_npsect); 2281558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 2291558Srgrimes if (preen) 2301558Srgrimes printf(" (FIXED)\n"); 2311558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 2321558Srgrimes sbdirty(); 2331558Srgrimes dirty(&asblk); 2341558Srgrimes } 2351558Srgrimes } 2361558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 2371558Srgrimes newinofmt = 1; 2381558Srgrimes } else { 2391558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2401558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 24171884Siedowse /* This should match the kernel limit in ffs_oldfscompat(). */ 24271884Siedowse sblock.fs_maxfilesize = (u_int64_t)1 << 39; 2431558Srgrimes newinofmt = 0; 2441558Srgrimes } 2451558Srgrimes /* 2461558Srgrimes * Convert to new inode format. 2471558Srgrimes */ 2481558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 2491558Srgrimes if (preen) 2501558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 2511558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 2521558Srgrimes return(0); 2531558Srgrimes doinglevel2++; 2541558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 2551558Srgrimes sizepb = sblock.fs_bsize; 2561558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2571558Srgrimes for (i = 0; i < NIADDR; i++) { 2581558Srgrimes sizepb *= NINDIR(&sblock); 2591558Srgrimes sblock.fs_maxfilesize += sizepb; 2601558Srgrimes } 2611558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2621558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2631558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2641558Srgrimes sbdirty(); 2651558Srgrimes dirty(&asblk); 2661558Srgrimes } 2671558Srgrimes /* 2681558Srgrimes * Convert to new cylinder group format. 2691558Srgrimes */ 2701558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2711558Srgrimes if (preen) 2721558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2731558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2741558Srgrimes return(0); 2751558Srgrimes doinglevel1++; 2761558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2771558Srgrimes sblock.fs_nrpos = 8; 2781558Srgrimes sblock.fs_postbloff = 2791558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 28023675Speter (char *)(&sblock.fs_firstfield); 2811558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 28223675Speter (u_char *)(&sblock.fs_firstfield); 2831558Srgrimes sblock.fs_cgsize = 2841558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 2851558Srgrimes sbdirty(); 2861558Srgrimes dirty(&asblk); 2871558Srgrimes } 28823675Speter if (asblk.b_dirty && !bflag) { 28923675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2901558Srgrimes flush(fswritefd, &asblk); 2911558Srgrimes } 2921558Srgrimes /* 2931558Srgrimes * read in the summary info. 2941558Srgrimes */ 2951558Srgrimes asked = 0; 29671073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 2971558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2981558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2991558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 30071073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 3011558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 3021558Srgrimes size) != 0 && !asked) { 3031558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 30434266Sjulian if (reply("CONTINUE") == 0) { 30534266Sjulian ckfini(0); 30623675Speter exit(EEXIT); 30734266Sjulian } 3081558Srgrimes asked++; 3091558Srgrimes } 3101558Srgrimes } 3111558Srgrimes /* 3121558Srgrimes * allocate and initialize the necessary maps 3131558Srgrimes */ 3141558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 3151558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 3161558Srgrimes if (blockmap == NULL) { 3171558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 3181558Srgrimes (unsigned)bmapsize); 3191558Srgrimes goto badsb; 3201558Srgrimes } 32141474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 32241474Sjulian sizeof(struct inostatlist)); 32341474Sjulian if (inostathead == NULL) { 32441474Sjulian printf("cannot alloc %u bytes for inostathead\n", 32541474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 3261558Srgrimes goto badsb; 3271558Srgrimes } 3281558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 32957573Smckusick dirhash = numdirs; 33034033Sphk if (numdirs == 0) { 33134033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 33234033Sphk goto badsb; 33334033Sphk } 3341558Srgrimes inplast = 0; 3351558Srgrimes listmax = numdirs + 10; 3361558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 3371558Srgrimes sizeof(struct inoinfo *)); 3381558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 3391558Srgrimes sizeof(struct inoinfo *)); 3401558Srgrimes if (inpsort == NULL || inphead == NULL) { 3418871Srgrimes printf("cannot alloc %u bytes for inphead\n", 3421558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 3431558Srgrimes goto badsb; 3441558Srgrimes } 3451558Srgrimes bufinit(); 34634266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 34734266Sjulian usedsoftdep = 1; 34834266Sjulian else 34934266Sjulian usedsoftdep = 0; 3501558Srgrimes return (1); 3511558Srgrimes 3521558Srgrimesbadsb: 35323675Speter ckfini(0); 3541558Srgrimes return (0); 3551558Srgrimes} 3561558Srgrimes 3571558Srgrimes/* 3581558Srgrimes * Read in the super block and its summary info. 3591558Srgrimes */ 36075557Smckusickint 3611558Srgrimesreadsb(listerr) 3621558Srgrimes int listerr; 3631558Srgrimes{ 36423675Speter ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3651558Srgrimes 3661558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3671558Srgrimes return (0); 3681558Srgrimes sblk.b_bno = super; 3691558Srgrimes sblk.b_size = SBSIZE; 3701558Srgrimes /* 3711558Srgrimes * run a few consistency checks of the super block 3721558Srgrimes */ 3731558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3741558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3751558Srgrimes if (sblock.fs_ncg < 1) 3761558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3771558Srgrimes if (sblock.fs_cpg < 1) 3781558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3791558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3801558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3811558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3821558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3831558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3841558Srgrimes /* 3851558Srgrimes * Compute block size that the filesystem is based on, 3861558Srgrimes * according to fsbtodb, and adjust superblock block number 3871558Srgrimes * so we can tell if this is an alternate later. 3881558Srgrimes */ 3891558Srgrimes super *= dev_bsize; 3901558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3911558Srgrimes sblk.b_bno = super / dev_bsize; 3921558Srgrimes if (bflag) { 3931558Srgrimes havesb = 1; 3941558Srgrimes return (1); 3951558Srgrimes } 3961558Srgrimes /* 3971558Srgrimes * Set all possible fields that could differ, then do check 3981558Srgrimes * of whole super block against an alternate super block. 3991558Srgrimes * When an alternate super-block is specified this check is skipped. 4001558Srgrimes */ 4011558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 4021558Srgrimes if (asblk.b_errs) 4031558Srgrimes return (0); 40423675Speter altsblock.fs_firstfield = sblock.fs_firstfield; 40523675Speter altsblock.fs_unused_1 = sblock.fs_unused_1; 4061558Srgrimes altsblock.fs_time = sblock.fs_time; 4071558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 4081558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 4091558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 4101558Srgrimes altsblock.fs_clean = sblock.fs_clean; 4111558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 4121558Srgrimes altsblock.fs_flags = sblock.fs_flags; 4131558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 4141558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 4151558Srgrimes altsblock.fs_optim = sblock.fs_optim; 4161558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 4171558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 41871073Siedowse memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 41971073Siedowse altsblock.fs_csp = sblock.fs_csp; 42023675Speter altsblock.fs_maxcluster = sblock.fs_maxcluster; 42175395Sjhb altsblock.fs_contigdirs = sblock.fs_contigdirs; 42275395Sjhb altsblock.fs_avgfilesize = sblock.fs_avgfilesize; 42375395Sjhb altsblock.fs_avgfpdir = sblock.fs_avgfpdir; 42423675Speter memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 42562668Smckusick memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 42662668Smckusick sizeof sblock.fs_snapinum); 42723675Speter memmove(altsblock.fs_sparecon, 42823675Speter sblock.fs_sparecon, sizeof sblock.fs_sparecon); 4291558Srgrimes /* 4301558Srgrimes * The following should not have to be copied. 4311558Srgrimes */ 4321558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 4331558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 4341558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 4351558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 43623675Speter altsblock.fs_state = sblock.fs_state; 4371558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 4381558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 4391558Srgrimes altsblock.fs_state = sblock.fs_state; 4401558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 44123675Speter if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 44223675Speter if (debug) { 44323675Speter long *nlp, *olp, *endlp; 44423675Speter 44523675Speter printf("superblock mismatches\n"); 44623675Speter nlp = (long *)&altsblock; 44723675Speter olp = (long *)&sblock; 44823675Speter endlp = olp + (sblock.fs_sbsize / sizeof *olp); 44923675Speter for ( ; olp < endlp; olp++, nlp++) { 45023675Speter if (*olp == *nlp) 45123675Speter continue; 45237236Sbde printf( 45337236Sbde "offset %d, original %ld, alternate %ld\n", 45423675Speter olp - (long *)&sblock, *olp, *nlp); 45523675Speter } 45623675Speter } 4571558Srgrimes badsb(listerr, 4581558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 4591558Srgrimes return (0); 4601558Srgrimes } 4611558Srgrimes havesb = 1; 4621558Srgrimes return (1); 4631558Srgrimes} 4641558Srgrimes 4657585Sbdestatic void 4661558Srgrimesbadsb(listerr, s) 4671558Srgrimes int listerr; 4681558Srgrimes char *s; 4691558Srgrimes{ 4701558Srgrimes 4711558Srgrimes if (!listerr) 4721558Srgrimes return; 4731558Srgrimes if (preen) 4741558Srgrimes printf("%s: ", cdevname); 4751558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4761558Srgrimes} 4771558Srgrimes 47875884Siedowsevoid 47975557Smckusicksblock_init() 48075557Smckusick{ 48175557Smckusick struct disklabel *lp; 48275557Smckusick 48375557Smckusick fswritefd = -1; 48475557Smckusick fsmodified = 0; 48575557Smckusick lfdir = 0; 48675557Smckusick initbarea(&sblk); 48775557Smckusick initbarea(&asblk); 48875557Smckusick sblk.b_un.b_buf = malloc(SBSIZE); 48975557Smckusick asblk.b_un.b_buf = malloc(SBSIZE); 49075557Smckusick if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 49175557Smckusick errx(EEXIT, "cannot allocate space for superblock"); 49275557Smckusick if ((lp = getdisklabel(NULL, fsreadfd))) 49375557Smckusick dev_bsize = secsize = lp->d_secsize; 49475557Smckusick else 49575557Smckusick dev_bsize = secsize = DEV_BSIZE; 49675557Smckusick} 49775557Smckusick 4981558Srgrimes/* 4991558Srgrimes * Calculate a prototype superblock based on information in the disk label. 5001558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 5011558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 5021558Srgrimes * their needed information is available! 5031558Srgrimes */ 50423675Speterstatic int 5051558Srgrimescalcsb(dev, devfd, fs) 5061558Srgrimes char *dev; 5071558Srgrimes int devfd; 5081558Srgrimes register struct fs *fs; 5091558Srgrimes{ 5101558Srgrimes register struct disklabel *lp; 5111558Srgrimes register struct partition *pp; 5121558Srgrimes register char *cp; 5131558Srgrimes int i; 5141558Srgrimes 51523675Speter cp = strchr(dev, '\0') - 1; 5167585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 5171558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 5181558Srgrimes return (0); 5191558Srgrimes } 5201558Srgrimes lp = getdisklabel(dev, devfd); 5211558Srgrimes if (isdigit(*cp)) 5221558Srgrimes pp = &lp->d_partitions[0]; 5231558Srgrimes else 5241558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 5251558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 5261558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 5271558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 5281558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 5291558Srgrimes return (0); 5301558Srgrimes } 53141474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 53241474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 53341474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 53441474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 53541474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 53632622Sbde return (0); 53732622Sbde } 53823675Speter memset(fs, 0, sizeof(struct fs)); 5391558Srgrimes fs->fs_fsize = pp->p_fsize; 5401558Srgrimes fs->fs_frag = pp->p_frag; 5411558Srgrimes fs->fs_cpg = pp->p_cpg; 5421558Srgrimes fs->fs_size = pp->p_size; 5431558Srgrimes fs->fs_ntrak = lp->d_ntracks; 5441558Srgrimes fs->fs_nsect = lp->d_nsectors; 5451558Srgrimes fs->fs_spc = lp->d_secpercyl; 5461558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 5471558Srgrimes fs->fs_sblkno = roundup( 5481558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 5491558Srgrimes fs->fs_frag); 5501558Srgrimes fs->fs_cgmask = 0xffffffff; 5511558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 5521558Srgrimes fs->fs_cgmask <<= 1; 5531558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 5541558Srgrimes fs->fs_cgmask <<= 1; 5551558Srgrimes fs->fs_cgoffset = roundup( 5561558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 5571558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 5581558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 5591558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 5601558Srgrimes fs->fs_fsbtodb++; 5611558Srgrimes dev_bsize = lp->d_secsize; 5621558Srgrimes return (1); 5631558Srgrimes} 5641558Srgrimes 56523675Speterstatic struct disklabel * 5661558Srgrimesgetdisklabel(s, fd) 5671558Srgrimes char *s; 5681558Srgrimes int fd; 5691558Srgrimes{ 5701558Srgrimes static struct disklabel lab; 5711558Srgrimes 5721558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 5731558Srgrimes if (s == NULL) 5741558Srgrimes return ((struct disklabel *)NULL); 5751558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 57623675Speter errx(EEXIT, "%s: can't read disk label", s); 5771558Srgrimes } 5781558Srgrimes return (&lab); 5791558Srgrimes} 580