setup.c revision 86514
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 86514 2001-11-17 23:48:21Z 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> 4786514Siedowse#include <sys/sysctl.h> 4823675Speter 4923675Speter#include <ufs/ufs/dinode.h> 5023675Speter#include <ufs/ffs/fs.h> 5123675Speter 5223675Speter#include <ctype.h> 5323675Speter#include <err.h> 541558Srgrimes#include <errno.h> 551558Srgrimes#include <string.h> 5623675Speter 571558Srgrimes#include "fsck.h" 581558Srgrimes 591558Srgrimesstruct bufarea asblk; 601558Srgrimes#define altsblock (*asblk.b_un.b_fs) 611558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 621558Srgrimes 6323675Speterstatic void badsb __P((int listerr, char *s)); 6423675Speterstatic int calcsb __P((char *dev, int devfd, struct fs *fs)); 6523675Speterstatic struct disklabel *getdisklabel __P((char *s, int fd)); 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{ 7686514Siedowse long cg, asked, i, j; 7775557Smckusick long bmapsize; 781558Srgrimes off_t sizepb; 791558Srgrimes struct stat statb; 801558Srgrimes struct fs proto; 8186514Siedowse size_t size; 821558Srgrimes 831558Srgrimes havesb = 0; 841558Srgrimes fswritefd = -1; 8562668Smckusick cursnapshot = 0; 861558Srgrimes if (stat(dev, &statb) < 0) { 871558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 8874556Smckusick if (bkgrdflag) { 8974556Smckusick unlink(snapname); 9074556Smckusick bkgrdflag = 0; 9174556Smckusick } 921558Srgrimes return (0); 931558Srgrimes } 9453781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9553781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9674556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9774556Smckusick unlink(snapname); 9874556Smckusick printf("background fsck lacks a snapshot\n"); 9974556Smckusick exit(EEXIT); 10074556Smckusick } 10174556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 10262668Smckusick cursnapshot = statb.st_ino; 10362668Smckusick } else { 10474556Smckusick if (cvtlevel == 0 || 10574556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10674556Smckusick if (preen && bkgrdflag) { 10774556Smckusick unlink(snapname); 10874556Smckusick bkgrdflag = 0; 10974556Smckusick } 11074556Smckusick pfatal("%s is not a disk device", dev); 11174556Smckusick if (reply("CONTINUE") == 0) { 11274556Smckusick if (bkgrdflag) { 11374556Smckusick unlink(snapname); 11474556Smckusick bkgrdflag = 0; 11574556Smckusick } 11674556Smckusick return (0); 11774556Smckusick } 11874556Smckusick } else { 11974556Smckusick if (bkgrdflag) { 12074556Smckusick unlink(snapname); 12174556Smckusick bkgrdflag = 0; 12274556Smckusick } 12374556Smckusick pfatal("cannot convert a snapshot"); 12474556Smckusick exit(EEXIT); 12574556Smckusick } 12662668Smckusick } 1271558Srgrimes } 1281558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 12974556Smckusick if (bkgrdflag) { 13074556Smckusick unlink(snapname); 13174556Smckusick bkgrdflag = 0; 13274556Smckusick } 1331558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1341558Srgrimes return (0); 1351558Srgrimes } 13674556Smckusick if (bkgrdflag) { 13774556Smckusick unlink(snapname); 13874556Smckusick size = MIBSIZE; 13974556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 14074556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 14174556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 14274556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 14374556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14474556Smckusick pfatal("kernel lacks background fsck support\n"); 14574556Smckusick exit(EEXIT); 14674556Smckusick } 14774556Smckusick cmd.version = FFS_CMD_VERSION; 14874556Smckusick cmd.handle = fsreadfd; 14974556Smckusick fswritefd = -1; 15074556Smckusick } 1511558Srgrimes if (preen == 0) 1521558Srgrimes printf("** %s", dev); 15374556Smckusick if (bkgrdflag == 0 && 15474556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1551558Srgrimes fswritefd = -1; 1561558Srgrimes if (preen) 1571558Srgrimes pfatal("NO WRITE ACCESS"); 1581558Srgrimes printf(" (NO WRITE)"); 1591558Srgrimes } 1601558Srgrimes if (preen == 0) 1611558Srgrimes printf("\n"); 1621558Srgrimes /* 1631558Srgrimes * Read in the superblock, looking for alternates if necessary 1641558Srgrimes */ 1651558Srgrimes if (readsb(1) == 0) { 16623675Speter skipclean = 0; 1671558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1681558Srgrimes return(0); 1691558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1701558Srgrimes return (0); 1711558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1721558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1731558Srgrimes if (readsb(0) != 0) 1741558Srgrimes break; 1751558Srgrimes } 1761558Srgrimes if (cg >= proto.fs_ncg) { 1771558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1781558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1791558Srgrimes "FAILED. YOU MUST USE THE", 1801558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1811558Srgrimes "LOCATION OF AN ALTERNATE", 1821558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1831558Srgrimes "INFORMATION; SEE fsck(8)."); 1846280Sbde bflag = 0; 1851558Srgrimes return(0); 1861558Srgrimes } 1871558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1886280Sbde bflag = 0; 1891558Srgrimes } 19075557Smckusick if (skipclean && preen && sblock.fs_clean) { 19141474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 19241474Sjulian return (-1); 19341474Sjulian } 1941558Srgrimes maxfsblock = sblock.fs_size; 1951558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1961558Srgrimes /* 1971558Srgrimes * Check and potentially fix certain fields in the super block. 1981558Srgrimes */ 1991558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 2001558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 2011558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2021558Srgrimes sblock.fs_optim = FS_OPTTIME; 2031558Srgrimes sbdirty(); 2041558Srgrimes } 2051558Srgrimes } 2061558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2071558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2081558Srgrimes sblock.fs_minfree); 2091558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2101558Srgrimes sblock.fs_minfree = 10; 2111558Srgrimes sbdirty(); 2121558Srgrimes } 2131558Srgrimes } 2148871Srgrimes if (sblock.fs_interleave < 1 || 2151558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 21674556Smckusick pfatal("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 2171558Srgrimes sblock.fs_interleave); 2181558Srgrimes sblock.fs_interleave = 1; 2191558Srgrimes if (preen) 2201558Srgrimes printf(" (FIXED)\n"); 2211558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 2221558Srgrimes sbdirty(); 2231558Srgrimes dirty(&asblk); 2241558Srgrimes } 2251558Srgrimes } 2268871Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 2271558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 22874556Smckusick pfatal("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 2291558Srgrimes sblock.fs_npsect); 2301558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 2311558Srgrimes if (preen) 2321558Srgrimes printf(" (FIXED)\n"); 2331558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 2341558Srgrimes sbdirty(); 2351558Srgrimes dirty(&asblk); 2361558Srgrimes } 2371558Srgrimes } 2381558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 2391558Srgrimes newinofmt = 1; 2401558Srgrimes } else { 2411558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2421558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 24371884Siedowse /* This should match the kernel limit in ffs_oldfscompat(). */ 24471884Siedowse sblock.fs_maxfilesize = (u_int64_t)1 << 39; 2451558Srgrimes newinofmt = 0; 2461558Srgrimes } 2471558Srgrimes /* 2481558Srgrimes * Convert to new inode format. 2491558Srgrimes */ 2501558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 2511558Srgrimes if (preen) 2521558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 2531558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 2541558Srgrimes return(0); 2551558Srgrimes doinglevel2++; 2561558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 2571558Srgrimes sizepb = sblock.fs_bsize; 2581558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2591558Srgrimes for (i = 0; i < NIADDR; i++) { 2601558Srgrimes sizepb *= NINDIR(&sblock); 2611558Srgrimes sblock.fs_maxfilesize += sizepb; 2621558Srgrimes } 2631558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2641558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2651558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2661558Srgrimes sbdirty(); 2671558Srgrimes dirty(&asblk); 2681558Srgrimes } 2691558Srgrimes /* 2701558Srgrimes * Convert to new cylinder group format. 2711558Srgrimes */ 2721558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2731558Srgrimes if (preen) 2741558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2751558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2761558Srgrimes return(0); 2771558Srgrimes doinglevel1++; 2781558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2791558Srgrimes sblock.fs_nrpos = 8; 2801558Srgrimes sblock.fs_postbloff = 2811558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 28223675Speter (char *)(&sblock.fs_firstfield); 2831558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 28423675Speter (u_char *)(&sblock.fs_firstfield); 2851558Srgrimes sblock.fs_cgsize = 2861558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 2871558Srgrimes sbdirty(); 2881558Srgrimes dirty(&asblk); 2891558Srgrimes } 29023675Speter if (asblk.b_dirty && !bflag) { 29123675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2921558Srgrimes flush(fswritefd, &asblk); 2931558Srgrimes } 2941558Srgrimes /* 2951558Srgrimes * read in the summary info. 2961558Srgrimes */ 2971558Srgrimes asked = 0; 29871073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 2991558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 3001558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 3011558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 30271073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 3031558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 3041558Srgrimes size) != 0 && !asked) { 3051558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 30634266Sjulian if (reply("CONTINUE") == 0) { 30734266Sjulian ckfini(0); 30823675Speter exit(EEXIT); 30934266Sjulian } 3101558Srgrimes asked++; 3111558Srgrimes } 3121558Srgrimes } 3131558Srgrimes /* 3141558Srgrimes * allocate and initialize the necessary maps 3151558Srgrimes */ 3161558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 3171558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 3181558Srgrimes if (blockmap == NULL) { 3191558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 3201558Srgrimes (unsigned)bmapsize); 3211558Srgrimes goto badsb; 3221558Srgrimes } 32341474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 32441474Sjulian sizeof(struct inostatlist)); 32541474Sjulian if (inostathead == NULL) { 32641474Sjulian printf("cannot alloc %u bytes for inostathead\n", 32741474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 3281558Srgrimes goto badsb; 3291558Srgrimes } 3301558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 33157573Smckusick dirhash = numdirs; 33234033Sphk if (numdirs == 0) { 33334033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 33434033Sphk goto badsb; 33534033Sphk } 3361558Srgrimes inplast = 0; 3371558Srgrimes listmax = numdirs + 10; 3381558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 3391558Srgrimes sizeof(struct inoinfo *)); 3401558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 3411558Srgrimes sizeof(struct inoinfo *)); 3421558Srgrimes if (inpsort == NULL || inphead == NULL) { 3438871Srgrimes printf("cannot alloc %u bytes for inphead\n", 3441558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 3451558Srgrimes goto badsb; 3461558Srgrimes } 3471558Srgrimes bufinit(); 34834266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 34934266Sjulian usedsoftdep = 1; 35034266Sjulian else 35134266Sjulian usedsoftdep = 0; 3521558Srgrimes return (1); 3531558Srgrimes 3541558Srgrimesbadsb: 35523675Speter ckfini(0); 3561558Srgrimes return (0); 3571558Srgrimes} 3581558Srgrimes 3591558Srgrimes/* 3601558Srgrimes * Read in the super block and its summary info. 3611558Srgrimes */ 36275557Smckusickint 3631558Srgrimesreadsb(listerr) 3641558Srgrimes int listerr; 3651558Srgrimes{ 36623675Speter ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3671558Srgrimes 3681558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3691558Srgrimes return (0); 3701558Srgrimes sblk.b_bno = super; 3711558Srgrimes sblk.b_size = SBSIZE; 3721558Srgrimes /* 3731558Srgrimes * run a few consistency checks of the super block 3741558Srgrimes */ 3751558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3761558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3771558Srgrimes if (sblock.fs_ncg < 1) 3781558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3791558Srgrimes if (sblock.fs_cpg < 1) 3801558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3811558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3821558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3831558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3841558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3851558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3861558Srgrimes /* 3871558Srgrimes * Compute block size that the filesystem is based on, 3881558Srgrimes * according to fsbtodb, and adjust superblock block number 3891558Srgrimes * so we can tell if this is an alternate later. 3901558Srgrimes */ 3911558Srgrimes super *= dev_bsize; 3921558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3931558Srgrimes sblk.b_bno = super / dev_bsize; 3941558Srgrimes if (bflag) { 3951558Srgrimes havesb = 1; 3961558Srgrimes return (1); 3971558Srgrimes } 3981558Srgrimes /* 3991558Srgrimes * Set all possible fields that could differ, then do check 4001558Srgrimes * of whole super block against an alternate super block. 4011558Srgrimes * When an alternate super-block is specified this check is skipped. 4021558Srgrimes */ 4031558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 4041558Srgrimes if (asblk.b_errs) 4051558Srgrimes return (0); 40623675Speter altsblock.fs_firstfield = sblock.fs_firstfield; 40723675Speter altsblock.fs_unused_1 = sblock.fs_unused_1; 4081558Srgrimes altsblock.fs_time = sblock.fs_time; 4091558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 4101558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 4111558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 4121558Srgrimes altsblock.fs_clean = sblock.fs_clean; 4131558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 4141558Srgrimes altsblock.fs_flags = sblock.fs_flags; 4151558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 4161558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 4171558Srgrimes altsblock.fs_optim = sblock.fs_optim; 4181558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 4191558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 42071073Siedowse memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp); 42171073Siedowse altsblock.fs_csp = sblock.fs_csp; 42223675Speter altsblock.fs_maxcluster = sblock.fs_maxcluster; 42375395Sjhb altsblock.fs_contigdirs = sblock.fs_contigdirs; 42475395Sjhb altsblock.fs_avgfilesize = sblock.fs_avgfilesize; 42575395Sjhb altsblock.fs_avgfpdir = sblock.fs_avgfpdir; 42677436Siedowse altsblock.fs_pendingblocks = sblock.fs_pendingblocks; 42777436Siedowse altsblock.fs_pendinginodes = sblock.fs_pendinginodes; 42823675Speter memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 42962668Smckusick memmove(altsblock.fs_snapinum, sblock.fs_snapinum, 43062668Smckusick sizeof sblock.fs_snapinum); 43123675Speter memmove(altsblock.fs_sparecon, 43223675Speter sblock.fs_sparecon, sizeof sblock.fs_sparecon); 4331558Srgrimes /* 4341558Srgrimes * The following should not have to be copied. 4351558Srgrimes */ 4361558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 4371558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 4381558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 4391558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 44023675Speter altsblock.fs_state = sblock.fs_state; 4411558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 4421558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 4431558Srgrimes altsblock.fs_state = sblock.fs_state; 4441558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 44523675Speter if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 44623675Speter if (debug) { 44723675Speter long *nlp, *olp, *endlp; 44823675Speter 44923675Speter printf("superblock mismatches\n"); 45023675Speter nlp = (long *)&altsblock; 45123675Speter olp = (long *)&sblock; 45223675Speter endlp = olp + (sblock.fs_sbsize / sizeof *olp); 45323675Speter for ( ; olp < endlp; olp++, nlp++) { 45423675Speter if (*olp == *nlp) 45523675Speter continue; 45637236Sbde printf( 45737236Sbde "offset %d, original %ld, alternate %ld\n", 45823675Speter olp - (long *)&sblock, *olp, *nlp); 45923675Speter } 46023675Speter } 4611558Srgrimes badsb(listerr, 4621558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 4631558Srgrimes return (0); 4641558Srgrimes } 4651558Srgrimes havesb = 1; 4661558Srgrimes return (1); 4671558Srgrimes} 4681558Srgrimes 4697585Sbdestatic void 4701558Srgrimesbadsb(listerr, s) 4711558Srgrimes int listerr; 4721558Srgrimes char *s; 4731558Srgrimes{ 4741558Srgrimes 4751558Srgrimes if (!listerr) 4761558Srgrimes return; 4771558Srgrimes if (preen) 4781558Srgrimes printf("%s: ", cdevname); 4791558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4801558Srgrimes} 4811558Srgrimes 48275884Siedowsevoid 48375557Smckusicksblock_init() 48475557Smckusick{ 48575557Smckusick struct disklabel *lp; 48675557Smckusick 48775557Smckusick fswritefd = -1; 48875557Smckusick fsmodified = 0; 48975557Smckusick lfdir = 0; 49075557Smckusick initbarea(&sblk); 49175557Smckusick initbarea(&asblk); 49275557Smckusick sblk.b_un.b_buf = malloc(SBSIZE); 49375557Smckusick asblk.b_un.b_buf = malloc(SBSIZE); 49475557Smckusick if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 49575557Smckusick errx(EEXIT, "cannot allocate space for superblock"); 49675557Smckusick if ((lp = getdisklabel(NULL, fsreadfd))) 49775557Smckusick dev_bsize = secsize = lp->d_secsize; 49875557Smckusick else 49975557Smckusick dev_bsize = secsize = DEV_BSIZE; 50075557Smckusick} 50175557Smckusick 5021558Srgrimes/* 5031558Srgrimes * Calculate a prototype superblock based on information in the disk label. 5041558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 5051558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 5061558Srgrimes * their needed information is available! 5071558Srgrimes */ 50823675Speterstatic int 5091558Srgrimescalcsb(dev, devfd, fs) 5101558Srgrimes char *dev; 5111558Srgrimes int devfd; 5121558Srgrimes register struct fs *fs; 5131558Srgrimes{ 5141558Srgrimes register struct disklabel *lp; 5151558Srgrimes register struct partition *pp; 5161558Srgrimes register char *cp; 5171558Srgrimes int i; 5181558Srgrimes 51923675Speter cp = strchr(dev, '\0') - 1; 5207585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 5211558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 5221558Srgrimes return (0); 5231558Srgrimes } 5241558Srgrimes lp = getdisklabel(dev, devfd); 5251558Srgrimes if (isdigit(*cp)) 5261558Srgrimes pp = &lp->d_partitions[0]; 5271558Srgrimes else 5281558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 5291558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 5301558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 5311558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 5321558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 5331558Srgrimes return (0); 5341558Srgrimes } 53541474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 53641474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 53741474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 53841474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 53941474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 54032622Sbde return (0); 54132622Sbde } 54223675Speter memset(fs, 0, sizeof(struct fs)); 5431558Srgrimes fs->fs_fsize = pp->p_fsize; 5441558Srgrimes fs->fs_frag = pp->p_frag; 5451558Srgrimes fs->fs_cpg = pp->p_cpg; 5461558Srgrimes fs->fs_size = pp->p_size; 5471558Srgrimes fs->fs_ntrak = lp->d_ntracks; 5481558Srgrimes fs->fs_nsect = lp->d_nsectors; 5491558Srgrimes fs->fs_spc = lp->d_secpercyl; 5501558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 5511558Srgrimes fs->fs_sblkno = roundup( 5521558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 5531558Srgrimes fs->fs_frag); 5541558Srgrimes fs->fs_cgmask = 0xffffffff; 5551558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 5561558Srgrimes fs->fs_cgmask <<= 1; 5571558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 5581558Srgrimes fs->fs_cgmask <<= 1; 5591558Srgrimes fs->fs_cgoffset = roundup( 5601558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 5611558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 5621558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 5631558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 5641558Srgrimes fs->fs_fsbtodb++; 5651558Srgrimes dev_bsize = lp->d_secsize; 5661558Srgrimes return (1); 5671558Srgrimes} 5681558Srgrimes 56923675Speterstatic struct disklabel * 5701558Srgrimesgetdisklabel(s, fd) 5711558Srgrimes char *s; 5721558Srgrimes int fd; 5731558Srgrimes{ 5741558Srgrimes static struct disklabel lab; 5751558Srgrimes 5761558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 5771558Srgrimes if (s == NULL) 5781558Srgrimes return ((struct disklabel *)NULL); 5791558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 58023675Speter errx(EEXIT, "%s: can't read disk label", s); 5811558Srgrimes } 5821558Srgrimes return (&lab); 5831558Srgrimes} 584