setup.c revision 6280
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 351558Srgrimesstatic char sccsid[] = "@(#)setup.c 8.2 (Berkeley) 2/21/94"; 361558Srgrimes#endif /* not lint */ 371558Srgrimes 381558Srgrimes#define DKTYPENAMES 391558Srgrimes#include <sys/param.h> 401558Srgrimes#include <sys/time.h> 411558Srgrimes#include <ufs/ufs/dinode.h> 421558Srgrimes#include <ufs/ffs/fs.h> 431558Srgrimes#include <sys/stat.h> 441558Srgrimes#include <sys/ioctl.h> 451558Srgrimes#include <sys/disklabel.h> 461558Srgrimes#include <sys/file.h> 471558Srgrimes#include <errno.h> 481558Srgrimes#include <stdlib.h> 491558Srgrimes#include <string.h> 501558Srgrimes#include <ctype.h> 511558Srgrimes#include "fsck.h" 521558Srgrimes 531558Srgrimesstruct bufarea asblk; 541558Srgrimes#define altsblock (*asblk.b_un.b_fs) 551558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 561558Srgrimes 571558Srgrimesstruct disklabel *getdisklabel(); 581558Srgrimes 591558Srgrimessetup(dev) 601558Srgrimes char *dev; 611558Srgrimes{ 621558Srgrimes long cg, size, asked, i, j; 631558Srgrimes long bmapsize; 641558Srgrimes struct disklabel *lp; 651558Srgrimes off_t sizepb; 661558Srgrimes struct stat statb; 671558Srgrimes struct fs proto; 681558Srgrimes 691558Srgrimes havesb = 0; 701558Srgrimes fswritefd = -1; 711558Srgrimes if (stat(dev, &statb) < 0) { 721558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 731558Srgrimes return (0); 741558Srgrimes } 751558Srgrimes if ((statb.st_mode & S_IFMT) != S_IFCHR) { 761558Srgrimes pfatal("%s is not a character device", dev); 771558Srgrimes if (reply("CONTINUE") == 0) 781558Srgrimes return (0); 791558Srgrimes } 801558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 811558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 821558Srgrimes return (0); 831558Srgrimes } 841558Srgrimes if (preen == 0) 851558Srgrimes printf("** %s", dev); 861558Srgrimes if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 871558Srgrimes fswritefd = -1; 881558Srgrimes if (preen) 891558Srgrimes pfatal("NO WRITE ACCESS"); 901558Srgrimes printf(" (NO WRITE)"); 911558Srgrimes } 921558Srgrimes if (preen == 0) 931558Srgrimes printf("\n"); 941558Srgrimes fsmodified = 0; 951558Srgrimes lfdir = 0; 961558Srgrimes initbarea(&sblk); 971558Srgrimes initbarea(&asblk); 981558Srgrimes sblk.b_un.b_buf = malloc(SBSIZE); 991558Srgrimes asblk.b_un.b_buf = malloc(SBSIZE); 1001558Srgrimes if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 1011558Srgrimes errexit("cannot allocate space for superblock\n"); 1021558Srgrimes if (lp = getdisklabel((char *)NULL, fsreadfd)) 1031558Srgrimes dev_bsize = secsize = lp->d_secsize; 1041558Srgrimes else 1051558Srgrimes dev_bsize = secsize = DEV_BSIZE; 1061558Srgrimes /* 1071558Srgrimes * Read in the superblock, looking for alternates if necessary 1081558Srgrimes */ 1091558Srgrimes if (readsb(1) == 0) { 1101558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1111558Srgrimes return(0); 1121558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1131558Srgrimes return (0); 1141558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1151558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1161558Srgrimes if (readsb(0) != 0) 1171558Srgrimes break; 1181558Srgrimes } 1191558Srgrimes if (cg >= proto.fs_ncg) { 1201558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1211558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1221558Srgrimes "FAILED. YOU MUST USE THE", 1231558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1241558Srgrimes "LOCATION OF AN ALTERNATE", 1251558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1261558Srgrimes "INFORMATION; SEE fsck(8)."); 1276280Sbde bflag = 0; 1281558Srgrimes return(0); 1291558Srgrimes } 1301558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1316280Sbde bflag = 0; 1321558Srgrimes } 1331558Srgrimes maxfsblock = sblock.fs_size; 1341558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1351558Srgrimes /* 1361558Srgrimes * Check and potentially fix certain fields in the super block. 1371558Srgrimes */ 1381558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1391558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 1401558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1411558Srgrimes sblock.fs_optim = FS_OPTTIME; 1421558Srgrimes sbdirty(); 1431558Srgrimes } 1441558Srgrimes } 1451558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 1461558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 1471558Srgrimes sblock.fs_minfree); 1481558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1491558Srgrimes sblock.fs_minfree = 10; 1501558Srgrimes sbdirty(); 1511558Srgrimes } 1521558Srgrimes } 1531558Srgrimes if (sblock.fs_interleave < 1 || 1541558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 1551558Srgrimes pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 1561558Srgrimes sblock.fs_interleave); 1571558Srgrimes sblock.fs_interleave = 1; 1581558Srgrimes if (preen) 1591558Srgrimes printf(" (FIXED)\n"); 1601558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1611558Srgrimes sbdirty(); 1621558Srgrimes dirty(&asblk); 1631558Srgrimes } 1641558Srgrimes } 1651558Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 1661558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 1671558Srgrimes pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 1681558Srgrimes sblock.fs_npsect); 1691558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 1701558Srgrimes if (preen) 1711558Srgrimes printf(" (FIXED)\n"); 1721558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1731558Srgrimes sbdirty(); 1741558Srgrimes dirty(&asblk); 1751558Srgrimes } 1761558Srgrimes } 1771558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 1781558Srgrimes newinofmt = 1; 1791558Srgrimes } else { 1801558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 1811558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 1821558Srgrimes newinofmt = 0; 1831558Srgrimes } 1841558Srgrimes /* 1851558Srgrimes * Convert to new inode format. 1861558Srgrimes */ 1871558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 1881558Srgrimes if (preen) 1891558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 1901558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 1911558Srgrimes return(0); 1921558Srgrimes doinglevel2++; 1931558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 1941558Srgrimes sizepb = sblock.fs_bsize; 1951558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 1961558Srgrimes for (i = 0; i < NIADDR; i++) { 1971558Srgrimes sizepb *= NINDIR(&sblock); 1981558Srgrimes sblock.fs_maxfilesize += sizepb; 1991558Srgrimes } 2001558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2011558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2021558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2031558Srgrimes sbdirty(); 2041558Srgrimes dirty(&asblk); 2051558Srgrimes } 2061558Srgrimes /* 2071558Srgrimes * Convert to new cylinder group format. 2081558Srgrimes */ 2091558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2101558Srgrimes if (preen) 2111558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2121558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2131558Srgrimes return(0); 2141558Srgrimes doinglevel1++; 2151558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2161558Srgrimes sblock.fs_nrpos = 8; 2171558Srgrimes sblock.fs_postbloff = 2181558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 2191558Srgrimes (char *)(&sblock.fs_link); 2201558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 2211558Srgrimes (u_char *)(&sblock.fs_link); 2221558Srgrimes sblock.fs_cgsize = 2231558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 2241558Srgrimes sbdirty(); 2251558Srgrimes dirty(&asblk); 2261558Srgrimes } 2271558Srgrimes if (asblk.b_dirty) { 2281558Srgrimes bcopy((char *)&sblock, (char *)&altsblock, 2291558Srgrimes (size_t)sblock.fs_sbsize); 2301558Srgrimes flush(fswritefd, &asblk); 2311558Srgrimes } 2321558Srgrimes /* 2331558Srgrimes * read in the summary info. 2341558Srgrimes */ 2351558Srgrimes asked = 0; 2361558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2371558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2381558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 2391558Srgrimes sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 2401558Srgrimes if (bread(fsreadfd, (char *)sblock.fs_csp[j], 2411558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2421558Srgrimes size) != 0 && !asked) { 2431558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 2441558Srgrimes if (reply("CONTINUE") == 0) 2451558Srgrimes errexit(""); 2461558Srgrimes asked++; 2471558Srgrimes } 2481558Srgrimes } 2491558Srgrimes /* 2501558Srgrimes * allocate and initialize the necessary maps 2511558Srgrimes */ 2521558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 2531558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2541558Srgrimes if (blockmap == NULL) { 2551558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2561558Srgrimes (unsigned)bmapsize); 2571558Srgrimes goto badsb; 2581558Srgrimes } 2591558Srgrimes statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 2601558Srgrimes if (statemap == NULL) { 2611558Srgrimes printf("cannot alloc %u bytes for statemap\n", 2621558Srgrimes (unsigned)(maxino + 1)); 2631558Srgrimes goto badsb; 2641558Srgrimes } 2651558Srgrimes typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 2661558Srgrimes if (typemap == NULL) { 2671558Srgrimes printf("cannot alloc %u bytes for typemap\n", 2681558Srgrimes (unsigned)(maxino + 1)); 2691558Srgrimes goto badsb; 2701558Srgrimes } 2711558Srgrimes lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 2721558Srgrimes if (lncntp == NULL) { 2731558Srgrimes printf("cannot alloc %u bytes for lncntp\n", 2741558Srgrimes (unsigned)(maxino + 1) * sizeof(short)); 2751558Srgrimes goto badsb; 2761558Srgrimes } 2771558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 2781558Srgrimes inplast = 0; 2791558Srgrimes listmax = numdirs + 10; 2801558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2811558Srgrimes sizeof(struct inoinfo *)); 2821558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2831558Srgrimes sizeof(struct inoinfo *)); 2841558Srgrimes if (inpsort == NULL || inphead == NULL) { 2851558Srgrimes printf("cannot alloc %u bytes for inphead\n", 2861558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 2871558Srgrimes goto badsb; 2881558Srgrimes } 2891558Srgrimes bufinit(); 2901558Srgrimes return (1); 2911558Srgrimes 2921558Srgrimesbadsb: 2931558Srgrimes ckfini(); 2941558Srgrimes return (0); 2951558Srgrimes} 2961558Srgrimes 2971558Srgrimes/* 2981558Srgrimes * Read in the super block and its summary info. 2991558Srgrimes */ 3001558Srgrimesreadsb(listerr) 3011558Srgrimes int listerr; 3021558Srgrimes{ 3031558Srgrimes daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3041558Srgrimes 3051558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3061558Srgrimes return (0); 3071558Srgrimes sblk.b_bno = super; 3081558Srgrimes sblk.b_size = SBSIZE; 3091558Srgrimes /* 3101558Srgrimes * run a few consistency checks of the super block 3111558Srgrimes */ 3121558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3131558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3141558Srgrimes if (sblock.fs_ncg < 1) 3151558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3161558Srgrimes if (sblock.fs_cpg < 1) 3171558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3181558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3191558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3201558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3211558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3221558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3231558Srgrimes /* 3241558Srgrimes * Compute block size that the filesystem is based on, 3251558Srgrimes * according to fsbtodb, and adjust superblock block number 3261558Srgrimes * so we can tell if this is an alternate later. 3271558Srgrimes */ 3281558Srgrimes super *= dev_bsize; 3291558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3301558Srgrimes sblk.b_bno = super / dev_bsize; 3311558Srgrimes if (bflag) { 3321558Srgrimes havesb = 1; 3331558Srgrimes return (1); 3341558Srgrimes } 3351558Srgrimes /* 3361558Srgrimes * Set all possible fields that could differ, then do check 3371558Srgrimes * of whole super block against an alternate super block. 3381558Srgrimes * When an alternate super-block is specified this check is skipped. 3391558Srgrimes */ 3401558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3411558Srgrimes if (asblk.b_errs) 3421558Srgrimes return (0); 3431558Srgrimes altsblock.fs_link = sblock.fs_link; 3441558Srgrimes altsblock.fs_rlink = sblock.fs_rlink; 3451558Srgrimes altsblock.fs_time = sblock.fs_time; 3461558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 3471558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 3481558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 3491558Srgrimes altsblock.fs_clean = sblock.fs_clean; 3501558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 3511558Srgrimes altsblock.fs_flags = sblock.fs_flags; 3521558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 3531558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 3541558Srgrimes altsblock.fs_optim = sblock.fs_optim; 3551558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 3561558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 3571558Srgrimes bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 3581558Srgrimes sizeof sblock.fs_csp); 3591558Srgrimes bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 3601558Srgrimes sizeof sblock.fs_fsmnt); 3611558Srgrimes bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 3621558Srgrimes sizeof sblock.fs_sparecon); 3631558Srgrimes /* 3641558Srgrimes * The following should not have to be copied. 3651558Srgrimes */ 3661558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 3671558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 3681558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 3691558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 3701558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 3711558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 3721558Srgrimes altsblock.fs_state = sblock.fs_state; 3731558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 3741558Srgrimes if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 3751558Srgrimes badsb(listerr, 3761558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 3771558Srgrimes return (0); 3781558Srgrimes } 3791558Srgrimes havesb = 1; 3801558Srgrimes return (1); 3811558Srgrimes} 3821558Srgrimes 3831558Srgrimesbadsb(listerr, s) 3841558Srgrimes int listerr; 3851558Srgrimes char *s; 3861558Srgrimes{ 3871558Srgrimes 3881558Srgrimes if (!listerr) 3891558Srgrimes return; 3901558Srgrimes if (preen) 3911558Srgrimes printf("%s: ", cdevname); 3921558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 3931558Srgrimes} 3941558Srgrimes 3951558Srgrimes/* 3961558Srgrimes * Calculate a prototype superblock based on information in the disk label. 3971558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 3981558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 3991558Srgrimes * their needed information is available! 4001558Srgrimes */ 4011558Srgrimescalcsb(dev, devfd, fs) 4021558Srgrimes char *dev; 4031558Srgrimes int devfd; 4041558Srgrimes register struct fs *fs; 4051558Srgrimes{ 4061558Srgrimes register struct disklabel *lp; 4071558Srgrimes register struct partition *pp; 4081558Srgrimes register char *cp; 4091558Srgrimes int i; 4101558Srgrimes 4111558Srgrimes cp = index(dev, '\0') - 1; 4121558Srgrimes if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { 4131558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4141558Srgrimes return (0); 4151558Srgrimes } 4161558Srgrimes lp = getdisklabel(dev, devfd); 4171558Srgrimes if (isdigit(*cp)) 4181558Srgrimes pp = &lp->d_partitions[0]; 4191558Srgrimes else 4201558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4211558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4221558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4231558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4241558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4251558Srgrimes return (0); 4261558Srgrimes } 4271558Srgrimes bzero((char *)fs, sizeof(struct fs)); 4281558Srgrimes fs->fs_fsize = pp->p_fsize; 4291558Srgrimes fs->fs_frag = pp->p_frag; 4301558Srgrimes fs->fs_cpg = pp->p_cpg; 4311558Srgrimes fs->fs_size = pp->p_size; 4321558Srgrimes fs->fs_ntrak = lp->d_ntracks; 4331558Srgrimes fs->fs_nsect = lp->d_nsectors; 4341558Srgrimes fs->fs_spc = lp->d_secpercyl; 4351558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 4361558Srgrimes fs->fs_sblkno = roundup( 4371558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 4381558Srgrimes fs->fs_frag); 4391558Srgrimes fs->fs_cgmask = 0xffffffff; 4401558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 4411558Srgrimes fs->fs_cgmask <<= 1; 4421558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 4431558Srgrimes fs->fs_cgmask <<= 1; 4441558Srgrimes fs->fs_cgoffset = roundup( 4451558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 4461558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 4471558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 4481558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 4491558Srgrimes fs->fs_fsbtodb++; 4501558Srgrimes dev_bsize = lp->d_secsize; 4511558Srgrimes return (1); 4521558Srgrimes} 4531558Srgrimes 4541558Srgrimesstruct disklabel * 4551558Srgrimesgetdisklabel(s, fd) 4561558Srgrimes char *s; 4571558Srgrimes int fd; 4581558Srgrimes{ 4591558Srgrimes static struct disklabel lab; 4601558Srgrimes 4611558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 4621558Srgrimes if (s == NULL) 4631558Srgrimes return ((struct disklabel *)NULL); 4641558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 4651558Srgrimes errexit("%s: can't read disk label\n", s); 4661558Srgrimes } 4671558Srgrimes return (&lab); 4681558Srgrimes} 469