setup.c revision 8871
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 357585Sbdestatic const 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> 487585Sbde#include <stdio.h> 491558Srgrimes#include <stdlib.h> 501558Srgrimes#include <string.h> 511558Srgrimes#include <ctype.h> 521558Srgrimes#include "fsck.h" 531558Srgrimes 541558Srgrimesstruct bufarea asblk; 551558Srgrimes#define altsblock (*asblk.b_un.b_fs) 561558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 571558Srgrimes 587585Sbdestatic int readsb __P((int listerr)); 597585Sbdestatic void badsb __P((int listerr, char *s)); 607585Sbdestatic int calcsb __P((char *dev, int devfd, struct fs *fs)); 617585Sbdestatic struct disklabel * getdisklabel __P((char *s, int fd)); 621558Srgrimes 637585Sbde 647585Sbdeint 651558Srgrimessetup(dev) 661558Srgrimes char *dev; 671558Srgrimes{ 681558Srgrimes long cg, size, asked, i, j; 691558Srgrimes long bmapsize; 701558Srgrimes struct disklabel *lp; 711558Srgrimes off_t sizepb; 721558Srgrimes struct stat statb; 731558Srgrimes struct fs proto; 741558Srgrimes 751558Srgrimes havesb = 0; 761558Srgrimes fswritefd = -1; 771558Srgrimes if (stat(dev, &statb) < 0) { 781558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 791558Srgrimes return (0); 801558Srgrimes } 811558Srgrimes if ((statb.st_mode & S_IFMT) != S_IFCHR) { 821558Srgrimes pfatal("%s is not a character device", dev); 831558Srgrimes if (reply("CONTINUE") == 0) 841558Srgrimes return (0); 851558Srgrimes } 861558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 871558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 881558Srgrimes return (0); 891558Srgrimes } 901558Srgrimes if (preen == 0) 911558Srgrimes printf("** %s", dev); 921558Srgrimes if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { 931558Srgrimes fswritefd = -1; 941558Srgrimes if (preen) 951558Srgrimes pfatal("NO WRITE ACCESS"); 961558Srgrimes printf(" (NO WRITE)"); 971558Srgrimes } 981558Srgrimes if (preen == 0) 991558Srgrimes printf("\n"); 1001558Srgrimes fsmodified = 0; 1011558Srgrimes lfdir = 0; 1021558Srgrimes initbarea(&sblk); 1031558Srgrimes initbarea(&asblk); 1041558Srgrimes sblk.b_un.b_buf = malloc(SBSIZE); 1051558Srgrimes asblk.b_un.b_buf = malloc(SBSIZE); 1061558Srgrimes if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 1071558Srgrimes errexit("cannot allocate space for superblock\n"); 1087585Sbde lp = getdisklabel((char *)NULL, fsreadfd); 1097585Sbde if (lp) 1101558Srgrimes dev_bsize = secsize = lp->d_secsize; 1111558Srgrimes else 1121558Srgrimes dev_bsize = secsize = DEV_BSIZE; 1131558Srgrimes /* 1141558Srgrimes * Read in the superblock, looking for alternates if necessary 1151558Srgrimes */ 1161558Srgrimes if (readsb(1) == 0) { 1171558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1181558Srgrimes return(0); 1191558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1201558Srgrimes return (0); 1211558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1221558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1231558Srgrimes if (readsb(0) != 0) 1241558Srgrimes break; 1251558Srgrimes } 1261558Srgrimes if (cg >= proto.fs_ncg) { 1271558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1281558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1291558Srgrimes "FAILED. YOU MUST USE THE", 1301558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1311558Srgrimes "LOCATION OF AN ALTERNATE", 1321558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1331558Srgrimes "INFORMATION; SEE fsck(8)."); 1346280Sbde bflag = 0; 1351558Srgrimes return(0); 1361558Srgrimes } 1371558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1386280Sbde bflag = 0; 1391558Srgrimes } 1401558Srgrimes maxfsblock = sblock.fs_size; 1411558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1421558Srgrimes /* 1431558Srgrimes * Check and potentially fix certain fields in the super block. 1441558Srgrimes */ 1451558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1461558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 1471558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1481558Srgrimes sblock.fs_optim = FS_OPTTIME; 1491558Srgrimes sbdirty(); 1501558Srgrimes } 1511558Srgrimes } 1521558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 1531558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 1541558Srgrimes sblock.fs_minfree); 1551558Srgrimes if (reply("SET TO DEFAULT") == 1) { 1561558Srgrimes sblock.fs_minfree = 10; 1571558Srgrimes sbdirty(); 1581558Srgrimes } 1591558Srgrimes } 1608871Srgrimes if (sblock.fs_interleave < 1 || 1611558Srgrimes sblock.fs_interleave > sblock.fs_nsect) { 1621558Srgrimes pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", 1631558Srgrimes sblock.fs_interleave); 1641558Srgrimes sblock.fs_interleave = 1; 1651558Srgrimes if (preen) 1661558Srgrimes printf(" (FIXED)\n"); 1671558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1681558Srgrimes sbdirty(); 1691558Srgrimes dirty(&asblk); 1701558Srgrimes } 1711558Srgrimes } 1728871Srgrimes if (sblock.fs_npsect < sblock.fs_nsect || 1731558Srgrimes sblock.fs_npsect > sblock.fs_nsect*2) { 1741558Srgrimes pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", 1751558Srgrimes sblock.fs_npsect); 1761558Srgrimes sblock.fs_npsect = sblock.fs_nsect; 1771558Srgrimes if (preen) 1781558Srgrimes printf(" (FIXED)\n"); 1791558Srgrimes if (preen || reply("SET TO DEFAULT") == 1) { 1801558Srgrimes sbdirty(); 1811558Srgrimes dirty(&asblk); 1821558Srgrimes } 1831558Srgrimes } 1841558Srgrimes if (sblock.fs_inodefmt >= FS_44INODEFMT) { 1851558Srgrimes newinofmt = 1; 1861558Srgrimes } else { 1871558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 1881558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 1891558Srgrimes newinofmt = 0; 1901558Srgrimes } 1911558Srgrimes /* 1921558Srgrimes * Convert to new inode format. 1931558Srgrimes */ 1941558Srgrimes if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) { 1951558Srgrimes if (preen) 1961558Srgrimes pwarn("CONVERTING TO NEW INODE FORMAT\n"); 1971558Srgrimes else if (!reply("CONVERT TO NEW INODE FORMAT")) 1981558Srgrimes return(0); 1991558Srgrimes doinglevel2++; 2001558Srgrimes sblock.fs_inodefmt = FS_44INODEFMT; 2011558Srgrimes sizepb = sblock.fs_bsize; 2021558Srgrimes sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; 2031558Srgrimes for (i = 0; i < NIADDR; i++) { 2041558Srgrimes sizepb *= NINDIR(&sblock); 2051558Srgrimes sblock.fs_maxfilesize += sizepb; 2061558Srgrimes } 2071558Srgrimes sblock.fs_maxsymlinklen = MAXSYMLINKLEN; 2081558Srgrimes sblock.fs_qbmask = ~sblock.fs_bmask; 2091558Srgrimes sblock.fs_qfmask = ~sblock.fs_fmask; 2101558Srgrimes sbdirty(); 2111558Srgrimes dirty(&asblk); 2121558Srgrimes } 2131558Srgrimes /* 2141558Srgrimes * Convert to new cylinder group format. 2151558Srgrimes */ 2161558Srgrimes if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) { 2171558Srgrimes if (preen) 2181558Srgrimes pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); 2191558Srgrimes else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) 2201558Srgrimes return(0); 2211558Srgrimes doinglevel1++; 2221558Srgrimes sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; 2231558Srgrimes sblock.fs_nrpos = 8; 2241558Srgrimes sblock.fs_postbloff = 2251558Srgrimes (char *)(&sblock.fs_opostbl[0][0]) - 2261558Srgrimes (char *)(&sblock.fs_link); 2271558Srgrimes sblock.fs_rotbloff = &sblock.fs_space[0] - 2281558Srgrimes (u_char *)(&sblock.fs_link); 2291558Srgrimes sblock.fs_cgsize = 2301558Srgrimes fragroundup(&sblock, CGSIZE(&sblock)); 2311558Srgrimes sbdirty(); 2321558Srgrimes dirty(&asblk); 2331558Srgrimes } 2341558Srgrimes if (asblk.b_dirty) { 2351558Srgrimes bcopy((char *)&sblock, (char *)&altsblock, 2361558Srgrimes (size_t)sblock.fs_sbsize); 2371558Srgrimes flush(fswritefd, &asblk); 2381558Srgrimes } 2391558Srgrimes /* 2401558Srgrimes * read in the summary info. 2411558Srgrimes */ 2421558Srgrimes asked = 0; 2431558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2441558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2451558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 2461558Srgrimes sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); 2471558Srgrimes if (bread(fsreadfd, (char *)sblock.fs_csp[j], 2481558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2491558Srgrimes size) != 0 && !asked) { 2501558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 2511558Srgrimes if (reply("CONTINUE") == 0) 2521558Srgrimes errexit(""); 2531558Srgrimes asked++; 2541558Srgrimes } 2551558Srgrimes } 2561558Srgrimes /* 2571558Srgrimes * allocate and initialize the necessary maps 2581558Srgrimes */ 2591558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 2601558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2611558Srgrimes if (blockmap == NULL) { 2621558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2631558Srgrimes (unsigned)bmapsize); 2641558Srgrimes goto badsb; 2651558Srgrimes } 2661558Srgrimes statemap = calloc((unsigned)(maxino + 1), sizeof(char)); 2671558Srgrimes if (statemap == NULL) { 2681558Srgrimes printf("cannot alloc %u bytes for statemap\n", 2691558Srgrimes (unsigned)(maxino + 1)); 2701558Srgrimes goto badsb; 2711558Srgrimes } 2721558Srgrimes typemap = calloc((unsigned)(maxino + 1), sizeof(char)); 2731558Srgrimes if (typemap == NULL) { 2741558Srgrimes printf("cannot alloc %u bytes for typemap\n", 2751558Srgrimes (unsigned)(maxino + 1)); 2761558Srgrimes goto badsb; 2771558Srgrimes } 2781558Srgrimes lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short)); 2791558Srgrimes if (lncntp == NULL) { 2808871Srgrimes printf("cannot alloc %u bytes for lncntp\n", 2811558Srgrimes (unsigned)(maxino + 1) * sizeof(short)); 2821558Srgrimes goto badsb; 2831558Srgrimes } 2841558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 2851558Srgrimes inplast = 0; 2861558Srgrimes listmax = numdirs + 10; 2871558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2881558Srgrimes sizeof(struct inoinfo *)); 2891558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2901558Srgrimes sizeof(struct inoinfo *)); 2911558Srgrimes if (inpsort == NULL || inphead == NULL) { 2928871Srgrimes printf("cannot alloc %u bytes for inphead\n", 2931558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 2941558Srgrimes goto badsb; 2951558Srgrimes } 2961558Srgrimes bufinit(); 2971558Srgrimes return (1); 2981558Srgrimes 2991558Srgrimesbadsb: 3001558Srgrimes ckfini(); 3011558Srgrimes return (0); 3021558Srgrimes} 3031558Srgrimes 3041558Srgrimes/* 3051558Srgrimes * Read in the super block and its summary info. 3061558Srgrimes */ 3077585Sbdestatic int 3081558Srgrimesreadsb(listerr) 3091558Srgrimes int listerr; 3101558Srgrimes{ 3111558Srgrimes daddr_t super = bflag ? bflag : SBOFF / dev_bsize; 3121558Srgrimes 3131558Srgrimes if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) 3141558Srgrimes return (0); 3151558Srgrimes sblk.b_bno = super; 3161558Srgrimes sblk.b_size = SBSIZE; 3171558Srgrimes /* 3181558Srgrimes * run a few consistency checks of the super block 3191558Srgrimes */ 3201558Srgrimes if (sblock.fs_magic != FS_MAGIC) 3211558Srgrimes { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } 3221558Srgrimes if (sblock.fs_ncg < 1) 3231558Srgrimes { badsb(listerr, "NCG OUT OF RANGE"); return (0); } 3241558Srgrimes if (sblock.fs_cpg < 1) 3251558Srgrimes { badsb(listerr, "CPG OUT OF RANGE"); return (0); } 3261558Srgrimes if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || 3271558Srgrimes (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) 3281558Srgrimes { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } 3291558Srgrimes if (sblock.fs_sbsize > SBSIZE) 3301558Srgrimes { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } 3311558Srgrimes /* 3321558Srgrimes * Compute block size that the filesystem is based on, 3331558Srgrimes * according to fsbtodb, and adjust superblock block number 3341558Srgrimes * so we can tell if this is an alternate later. 3351558Srgrimes */ 3361558Srgrimes super *= dev_bsize; 3371558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3381558Srgrimes sblk.b_bno = super / dev_bsize; 3391558Srgrimes if (bflag) { 3401558Srgrimes havesb = 1; 3411558Srgrimes return (1); 3421558Srgrimes } 3431558Srgrimes /* 3441558Srgrimes * Set all possible fields that could differ, then do check 3451558Srgrimes * of whole super block against an alternate super block. 3461558Srgrimes * When an alternate super-block is specified this check is skipped. 3471558Srgrimes */ 3481558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3491558Srgrimes if (asblk.b_errs) 3501558Srgrimes return (0); 3511558Srgrimes altsblock.fs_link = sblock.fs_link; 3521558Srgrimes altsblock.fs_rlink = sblock.fs_rlink; 3531558Srgrimes altsblock.fs_time = sblock.fs_time; 3541558Srgrimes altsblock.fs_cstotal = sblock.fs_cstotal; 3551558Srgrimes altsblock.fs_cgrotor = sblock.fs_cgrotor; 3561558Srgrimes altsblock.fs_fmod = sblock.fs_fmod; 3571558Srgrimes altsblock.fs_clean = sblock.fs_clean; 3581558Srgrimes altsblock.fs_ronly = sblock.fs_ronly; 3591558Srgrimes altsblock.fs_flags = sblock.fs_flags; 3601558Srgrimes altsblock.fs_maxcontig = sblock.fs_maxcontig; 3611558Srgrimes altsblock.fs_minfree = sblock.fs_minfree; 3621558Srgrimes altsblock.fs_optim = sblock.fs_optim; 3631558Srgrimes altsblock.fs_rotdelay = sblock.fs_rotdelay; 3641558Srgrimes altsblock.fs_maxbpg = sblock.fs_maxbpg; 3651558Srgrimes bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, 3661558Srgrimes sizeof sblock.fs_csp); 3671558Srgrimes bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, 3681558Srgrimes sizeof sblock.fs_fsmnt); 3691558Srgrimes bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, 3701558Srgrimes sizeof sblock.fs_sparecon); 3711558Srgrimes /* 3721558Srgrimes * The following should not have to be copied. 3731558Srgrimes */ 3741558Srgrimes altsblock.fs_fsbtodb = sblock.fs_fsbtodb; 3751558Srgrimes altsblock.fs_interleave = sblock.fs_interleave; 3761558Srgrimes altsblock.fs_npsect = sblock.fs_npsect; 3771558Srgrimes altsblock.fs_nrpos = sblock.fs_nrpos; 3781558Srgrimes altsblock.fs_qbmask = sblock.fs_qbmask; 3791558Srgrimes altsblock.fs_qfmask = sblock.fs_qfmask; 3801558Srgrimes altsblock.fs_state = sblock.fs_state; 3811558Srgrimes altsblock.fs_maxfilesize = sblock.fs_maxfilesize; 3821558Srgrimes if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { 3831558Srgrimes badsb(listerr, 3841558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 3851558Srgrimes return (0); 3861558Srgrimes } 3871558Srgrimes havesb = 1; 3881558Srgrimes return (1); 3891558Srgrimes} 3901558Srgrimes 3917585Sbdestatic void 3921558Srgrimesbadsb(listerr, s) 3931558Srgrimes int listerr; 3941558Srgrimes char *s; 3951558Srgrimes{ 3961558Srgrimes 3971558Srgrimes if (!listerr) 3981558Srgrimes return; 3991558Srgrimes if (preen) 4001558Srgrimes printf("%s: ", cdevname); 4011558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4021558Srgrimes} 4031558Srgrimes 4041558Srgrimes/* 4051558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4061558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4071558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4081558Srgrimes * their needed information is available! 4091558Srgrimes */ 4107585Sbdeint 4111558Srgrimescalcsb(dev, devfd, fs) 4121558Srgrimes char *dev; 4131558Srgrimes int devfd; 4141558Srgrimes register struct fs *fs; 4151558Srgrimes{ 4161558Srgrimes register struct disklabel *lp; 4171558Srgrimes register struct partition *pp; 4181558Srgrimes register char *cp; 4191558Srgrimes int i; 4201558Srgrimes 4211558Srgrimes cp = index(dev, '\0') - 1; 4227585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4231558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4241558Srgrimes return (0); 4251558Srgrimes } 4261558Srgrimes lp = getdisklabel(dev, devfd); 4271558Srgrimes if (isdigit(*cp)) 4281558Srgrimes pp = &lp->d_partitions[0]; 4291558Srgrimes else 4301558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4311558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4321558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4331558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4341558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4351558Srgrimes return (0); 4361558Srgrimes } 4371558Srgrimes bzero((char *)fs, sizeof(struct fs)); 4381558Srgrimes fs->fs_fsize = pp->p_fsize; 4391558Srgrimes fs->fs_frag = pp->p_frag; 4401558Srgrimes fs->fs_cpg = pp->p_cpg; 4411558Srgrimes fs->fs_size = pp->p_size; 4421558Srgrimes fs->fs_ntrak = lp->d_ntracks; 4431558Srgrimes fs->fs_nsect = lp->d_nsectors; 4441558Srgrimes fs->fs_spc = lp->d_secpercyl; 4451558Srgrimes fs->fs_nspf = fs->fs_fsize / lp->d_secsize; 4461558Srgrimes fs->fs_sblkno = roundup( 4471558Srgrimes howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 4481558Srgrimes fs->fs_frag); 4491558Srgrimes fs->fs_cgmask = 0xffffffff; 4501558Srgrimes for (i = fs->fs_ntrak; i > 1; i >>= 1) 4511558Srgrimes fs->fs_cgmask <<= 1; 4521558Srgrimes if (!POWEROF2(fs->fs_ntrak)) 4531558Srgrimes fs->fs_cgmask <<= 1; 4541558Srgrimes fs->fs_cgoffset = roundup( 4551558Srgrimes howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); 4561558Srgrimes fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); 4571558Srgrimes fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); 4581558Srgrimes for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) 4591558Srgrimes fs->fs_fsbtodb++; 4601558Srgrimes dev_bsize = lp->d_secsize; 4611558Srgrimes return (1); 4621558Srgrimes} 4631558Srgrimes 4641558Srgrimesstruct disklabel * 4651558Srgrimesgetdisklabel(s, fd) 4661558Srgrimes char *s; 4671558Srgrimes int fd; 4681558Srgrimes{ 4691558Srgrimes static struct disklabel lab; 4701558Srgrimes 4711558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 4721558Srgrimes if (s == NULL) 4731558Srgrimes return ((struct disklabel *)NULL); 4741558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 4751558Srgrimes errexit("%s: can't read disk label\n", s); 4761558Srgrimes } 4771558Srgrimes return (&lab); 4781558Srgrimes} 479