setup.c revision 41474
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 3523675Speterstatic const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 361558Srgrimes#endif /* not lint */ 371558Srgrimes 381558Srgrimes#define DKTYPENAMES 391558Srgrimes#include <sys/param.h> 401558Srgrimes#include <sys/stat.h> 4141474Sjulian#include <sys/ioctl.h> 421558Srgrimes#include <sys/disklabel.h> 431558Srgrimes#include <sys/file.h> 4423675Speter 4523675Speter#include <ufs/ufs/dinode.h> 4623675Speter#include <ufs/ffs/fs.h> 4723675Speter 4823675Speter#include <ctype.h> 4923675Speter#include <err.h> 501558Srgrimes#include <errno.h> 511558Srgrimes#include <string.h> 5223675Speter 531558Srgrimes#include "fsck.h" 541558Srgrimes 551558Srgrimesstruct bufarea asblk; 561558Srgrimes#define altsblock (*asblk.b_un.b_fs) 571558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 581558Srgrimes 5923675Speterstatic void badsb __P((int listerr, char *s)); 6023675Speterstatic int calcsb __P((char *dev, int devfd, struct fs *fs)); 6123675Speterstatic struct disklabel *getdisklabel __P((char *s, int fd)); 6223675Speterstatic int readsb __P((int listerr)); 631558Srgrimes 6423675Speter/* 6523675Speter * Read in a superblock finding an alternate if necessary. 6623675Speter * Return 1 if successful, 0 if unsuccessful, -1 if filesystem 6723675Speter * is already clean (preen mode only). 6823675Speter */ 697585Sbdeint 701558Srgrimessetup(dev) 711558Srgrimes char *dev; 721558Srgrimes{ 731558Srgrimes long cg, size, asked, i, j; 7423675Speter long skipclean, bmapsize; 751558Srgrimes struct disklabel *lp; 761558Srgrimes off_t sizepb; 771558Srgrimes struct stat statb; 781558Srgrimes struct fs proto; 791558Srgrimes 801558Srgrimes havesb = 0; 811558Srgrimes fswritefd = -1; 8241474Sjulian skipclean = fflag ? 0 : preen; 831558Srgrimes if (stat(dev, &statb) < 0) { 841558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 851558Srgrimes return (0); 861558Srgrimes } 871558Srgrimes if ((statb.st_mode & S_IFMT) != S_IFCHR) { 881558Srgrimes pfatal("%s is not a character device", dev); 891558Srgrimes if (reply("CONTINUE") == 0) 901558Srgrimes return (0); 911558Srgrimes } 921558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 931558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 941558Srgrimes return (0); 951558Srgrimes } 961558Srgrimes if (preen == 0) 971558Srgrimes printf("** %s", dev); 981558Srgrimes if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 991558Srgrimes fswritefd = -1; 1001558Srgrimes if (preen) 1011558Srgrimes pfatal("NO WRITE ACCESS"); 1021558Srgrimes printf(" (NO WRITE)"); 1031558Srgrimes } 1041558Srgrimes if (preen == 0) 1051558Srgrimes printf("\n"); 1061558Srgrimes fsmodified = 0; 1071558Srgrimes lfdir = 0; 1081558Srgrimes initbarea(&sblk); 1091558Srgrimes initbarea(&asblk); 1101558Srgrimes sblk.b_un.b_buf = malloc(SBSIZE); 1111558Srgrimes asblk.b_un.b_buf = malloc(SBSIZE); 1121558Srgrimes if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 11323675Speter errx(EEXIT, "cannot allocate space for superblock"); 11441474Sjulian if ((lp = getdisklabel(NULL, fsreadfd))) 1151558Srgrimes dev_bsize = secsize = lp->d_secsize; 1161558Srgrimes else 1171558Srgrimes dev_bsize = secsize = DEV_BSIZE; 1181558Srgrimes /* 1191558Srgrimes * Read in the superblock, looking for alternates if necessary 1201558Srgrimes */ 1211558Srgrimes if (readsb(1) == 0) { 12223675Speter skipclean = 0; 1231558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1241558Srgrimes return(0); 1251558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1261558Srgrimes return (0); 1271558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1281558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1291558Srgrimes if (readsb(0) != 0) 1301558Srgrimes break; 1311558Srgrimes } 1321558Srgrimes if (cg >= proto.fs_ncg) { 1331558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1341558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1351558Srgrimes "FAILED. YOU MUST USE THE", 1361558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1371558Srgrimes "LOCATION OF AN ALTERNATE", 1381558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1391558Srgrimes "INFORMATION; SEE fsck(8)."); 1406280Sbde bflag = 0; 1411558Srgrimes return(0); 1421558Srgrimes } 1431558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1446280Sbde bflag = 0; 1451558Srgrimes } 14641474Sjulian if (skipclean && sblock.fs_clean) { 14741474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 14841474Sjulian return (-1); 14941474Sjulian } 1501558Srgrimes maxfsblock = sblock.fs_size; 1511558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1521558Srgrimes /* 1531558Srgrimes * Check and potentially fix certain fields in the super block. 1541558Srgrimes */ 1551558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1561558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 1571558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1581558Srgrimes sblock.fs_optim = FS_OPTTIME; 1591558Srgrimes sbdirty(); 1601558Srgrimes } 1611558Srgrimes } 1621558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 1631558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 1641558Srgrimes sblock.fs_minfree); 1651558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1661558Srgrimes sblock.fs_minfree = 10; 1671558Srgrimes sbdirty(); 1681558Srgrimes } 1691558Srgrimes } 1708871Srgrimes if (sblock.fs_interleave < 1 || 1711558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 1721558Srgrimes pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 1731558Srgrimes sblock.fs_interleave); 1741558Srgrimes sblock.fs_interleave = 1; 1751558Srgrimes if (preen) 1761558Srgrimes printf(" (FIXED)\n"); 1771558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1781558Srgrimes sbdirty(); 1791558Srgrimes dirty(&asblk); 1801558Srgrimes } 1811558Srgrimes } 1828871Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 1831558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 1841558Srgrimes pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 1851558Srgrimes sblock.fs_npsect); 1861558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 1871558Srgrimes if (preen) 1881558Srgrimes printf(" (FIXED)\n"); 1891558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1901558Srgrimes sbdirty(); 1911558Srgrimes dirty(&asblk); 1921558Srgrimes } 1931558Srgrimes } 1941558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 1951558Srgrimes newinofmt = 1; 1961558Srgrimes } else { 1971558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 1981558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 1991558Srgrimes newinofmt = 0; 2001558Srgrimes } 2011558Srgrimes /* 2021558Srgrimes * Convert to new inode format. 2031558Srgrimes */ 2041558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 2051558Srgrimes if (preen) 2061558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 2071558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 2081558Srgrimes return(0); 2091558Srgrimes doinglevel2++; 2101558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 2111558Srgrimes sizepb = sblock.fs_bsize; 2121558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2131558Srgrimes for (i = 0; i < NIADDR; i++) { 2141558Srgrimes sizepb *= NINDIR(&sblock); 2151558Srgrimes sblock.fs_maxfilesize += sizepb; 2161558Srgrimes } 2171558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2181558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2191558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2201558Srgrimes sbdirty(); 2211558Srgrimes dirty(&asblk); 2221558Srgrimes } 2231558Srgrimes /* 2241558Srgrimes * Convert to new cylinder group format. 2251558Srgrimes */ 2261558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2271558Srgrimes if (preen) 2281558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2291558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2301558Srgrimes return(0); 2311558Srgrimes doinglevel1++; 2321558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2331558Srgrimes sblock.fs_nrpos = 8; 2341558Srgrimes sblock.fs_postbloff = 2351558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 23623675Speter (char *)(&sblock.fs_firstfield); 2371558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 23823675Speter (u_char *)(&sblock.fs_firstfield); 2391558Srgrimes sblock.fs_cgsize = 2401558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 2411558Srgrimes sbdirty(); 2421558Srgrimes dirty(&asblk); 2431558Srgrimes } 24423675Speter if (asblk.b_dirty && !bflag) { 24523675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2461558Srgrimes flush(fswritefd, &asblk); 2471558Srgrimes } 2481558Srgrimes /* 2491558Srgrimes * read in the summary info. 2501558Srgrimes */ 2511558Srgrimes asked = 0; 2521558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2531558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2541558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 2551558Srgrimes sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 2561558Srgrimes if (bread(fsreadfd, (char *)sblock.fs_csp[j], 2571558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2581558Srgrimes size) != 0 && !asked) { 2591558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 26034266Sjulian if (reply("CONTINUE") == 0) { 26134266Sjulian ckfini(0); 26223675Speter exit(EEXIT); 26334266Sjulian } 2641558Srgrimes asked++; 2651558Srgrimes } 2661558Srgrimes } 2671558Srgrimes /* 2681558Srgrimes * allocate and initialize the necessary maps 2691558Srgrimes */ 2701558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 2711558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2721558Srgrimes if (blockmap == NULL) { 2731558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2741558Srgrimes (unsigned)bmapsize); 2751558Srgrimes goto badsb; 2761558Srgrimes } 27741474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 27841474Sjulian sizeof(struct inostatlist)); 27941474Sjulian if (inostathead == NULL) { 28041474Sjulian printf("cannot alloc %u bytes for inostathead\n", 28141474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 2821558Srgrimes goto badsb; 2831558Srgrimes } 2841558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 28534033Sphk if (numdirs == 0) { 28634033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 28734033Sphk goto badsb; 28834033Sphk } 2891558Srgrimes inplast = 0; 2901558Srgrimes listmax = numdirs + 10; 2911558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2921558Srgrimes sizeof(struct inoinfo *)); 2931558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2941558Srgrimes sizeof(struct inoinfo *)); 2951558Srgrimes if (inpsort == NULL || inphead == NULL) { 2968871Srgrimes printf("cannot alloc %u bytes for inphead\n", 2971558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 2981558Srgrimes goto badsb; 2991558Srgrimes } 3001558Srgrimes bufinit(); 30134266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 30234266Sjulian usedsoftdep = 1; 30334266Sjulian else 30434266Sjulian usedsoftdep = 0; 3051558Srgrimes return (1); 3061558Srgrimes 3071558Srgrimesbadsb: 30823675Speter ckfini(0); 3091558Srgrimes return (0); 3101558Srgrimes} 3111558Srgrimes 3121558Srgrimes/* 3131558Srgrimes * Read in the super block and its summary info. 3141558Srgrimes */ 3157585Sbdestatic int 3161558Srgrimesreadsb(listerr) 3171558Srgrimes int listerr; 3181558Srgrimes{ 31923675Speter ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3201558Srgrimes 3211558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3221558Srgrimes return (0); 3231558Srgrimes sblk.b_bno = super; 3241558Srgrimes sblk.b_size = SBSIZE; 3251558Srgrimes /* 3261558Srgrimes * run a few consistency checks of the super block 3271558Srgrimes */ 3281558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3291558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3301558Srgrimes if (sblock.fs_ncg < 1) 3311558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3321558Srgrimes if (sblock.fs_cpg < 1) 3331558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3341558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3351558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3361558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3371558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3381558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3391558Srgrimes /* 3401558Srgrimes * Compute block size that the filesystem is based on, 3411558Srgrimes * according to fsbtodb, and adjust superblock block number 3421558Srgrimes * so we can tell if this is an alternate later. 3431558Srgrimes */ 3441558Srgrimes super *= dev_bsize; 3451558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3461558Srgrimes sblk.b_bno = super / dev_bsize; 3471558Srgrimes if (bflag) { 3481558Srgrimes havesb = 1; 3491558Srgrimes return (1); 3501558Srgrimes } 3511558Srgrimes /* 3521558Srgrimes * Set all possible fields that could differ, then do check 3531558Srgrimes * of whole super block against an alternate super block. 3541558Srgrimes * When an alternate super-block is specified this check is skipped. 3551558Srgrimes */ 3561558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3571558Srgrimes if (asblk.b_errs) 3581558Srgrimes return (0); 35923675Speter altsblock.fs_firstfield = sblock.fs_firstfield; 36023675Speter altsblock.fs_unused_1 = sblock.fs_unused_1; 3611558Srgrimes altsblock.fs_time = sblock.fs_time; 3621558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 3631558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 3641558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 3651558Srgrimes altsblock.fs_clean = sblock.fs_clean; 3661558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 3671558Srgrimes altsblock.fs_flags = sblock.fs_flags; 3681558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 3691558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 3701558Srgrimes altsblock.fs_optim = sblock.fs_optim; 3711558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 3721558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 37323675Speter memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp); 37423675Speter altsblock.fs_maxcluster = sblock.fs_maxcluster; 37523675Speter memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt); 37623675Speter memmove(altsblock.fs_sparecon, 37723675Speter sblock.fs_sparecon, sizeof sblock.fs_sparecon); 3781558Srgrimes /* 3791558Srgrimes * The following should not have to be copied. 3801558Srgrimes */ 3811558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 3821558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 3831558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 3841558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 38523675Speter altsblock.fs_state = sblock.fs_state; 3861558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 3871558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 3881558Srgrimes altsblock.fs_state = sblock.fs_state; 3891558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 39023675Speter if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) { 39123675Speter if (debug) { 39223675Speter long *nlp, *olp, *endlp; 39323675Speter 39423675Speter printf("superblock mismatches\n"); 39523675Speter nlp = (long *)&altsblock; 39623675Speter olp = (long *)&sblock; 39723675Speter endlp = olp + (sblock.fs_sbsize / sizeof *olp); 39823675Speter for ( ; olp < endlp; olp++, nlp++) { 39923675Speter if (*olp == *nlp) 40023675Speter continue; 40137236Sbde printf( 40237236Sbde "offset %d, original %ld, alternate %ld\n", 40323675Speter olp - (long *)&sblock, *olp, *nlp); 40423675Speter } 40523675Speter } 4061558Srgrimes badsb(listerr, 4071558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 4081558Srgrimes return (0); 4091558Srgrimes } 4101558Srgrimes havesb = 1; 4111558Srgrimes return (1); 4121558Srgrimes} 4131558Srgrimes 4147585Sbdestatic void 4151558Srgrimesbadsb(listerr, s) 4161558Srgrimes int listerr; 4171558Srgrimes char *s; 4181558Srgrimes{ 4191558Srgrimes 4201558Srgrimes if (!listerr) 4211558Srgrimes return; 4221558Srgrimes if (preen) 4231558Srgrimes printf("%s: ", cdevname); 4241558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4251558Srgrimes} 4261558Srgrimes 4271558Srgrimes/* 4281558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4291558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4301558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4311558Srgrimes * their needed information is available! 4321558Srgrimes */ 43323675Speterstatic int 4341558Srgrimescalcsb(dev, devfd, fs) 4351558Srgrimes char *dev; 4361558Srgrimes int devfd; 4371558Srgrimes register struct fs *fs; 4381558Srgrimes{ 4391558Srgrimes register struct disklabel *lp; 4401558Srgrimes register struct partition *pp; 4411558Srgrimes register char *cp; 4421558Srgrimes int i; 4431558Srgrimes 44423675Speter cp = strchr(dev, '\0') - 1; 4457585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4461558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4471558Srgrimes return (0); 4481558Srgrimes } 4491558Srgrimes lp = getdisklabel(dev, devfd); 4501558Srgrimes if (isdigit(*cp)) 4511558Srgrimes pp = &lp->d_partitions[0]; 4521558Srgrimes else 4531558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4541558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4551558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4561558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4571558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4581558Srgrimes return (0); 4591558Srgrimes } 46041474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 46141474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 46241474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 46341474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 46441474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 46532622Sbde return (0); 46632622Sbde } 46723675Speter memset(fs, 0, sizeof(struct fs)); 4681558Srgrimes fs->fs_fsize = pp->p_fsize; 4691558Srgrimes fs->fs_frag = pp->p_frag; 4701558Srgrimes fs->fs_cpg = pp->p_cpg; 4711558Srgrimes fs->fs_size = pp->p_size; 4721558Srgrimes fs->fs_ntrak = lp->d_ntracks; 4731558Srgrimes fs->fs_nsect = lp->d_nsectors; 4741558Srgrimes fs->fs_spc = lp->d_secpercyl; 4751558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 4761558Srgrimes fs->fs_sblkno = roundup( 4771558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 4781558Srgrimes fs->fs_frag); 4791558Srgrimes fs->fs_cgmask = 0xffffffff; 4801558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 4811558Srgrimes fs->fs_cgmask <<= 1; 4821558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 4831558Srgrimes fs->fs_cgmask <<= 1; 4841558Srgrimes fs->fs_cgoffset = roundup( 4851558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 4861558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 4871558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 4881558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 4891558Srgrimes fs->fs_fsbtodb++; 4901558Srgrimes dev_bsize = lp->d_secsize; 4911558Srgrimes return (1); 4921558Srgrimes} 4931558Srgrimes 49423675Speterstatic struct disklabel * 4951558Srgrimesgetdisklabel(s, fd) 4961558Srgrimes char *s; 4971558Srgrimes int fd; 4981558Srgrimes{ 4991558Srgrimes static struct disklabel lab; 5001558Srgrimes 5011558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 5021558Srgrimes if (s == NULL) 5031558Srgrimes return ((struct disklabel *)NULL); 5041558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 50523675Speter errx(EEXIT, "%s: can't read disk label", s); 5061558Srgrimes } 5071558Srgrimes return (&lab); 5081558Srgrimes} 509