setup.c revision 102231
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 102231 2002-08-21 18:11:48Z trhodes $"; 401558Srgrimes#endif /* not lint */ 411558Srgrimes 421558Srgrimes#include <sys/param.h> 431558Srgrimes#include <sys/stat.h> 44101994Sbmilekic#define FSTYPENAMES 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> 55101037Smux#include <stdint.h> 561558Srgrimes#include <string.h> 5723675Speter 581558Srgrimes#include "fsck.h" 591558Srgrimes 601558Srgrimesstruct bufarea asblk; 611558Srgrimes#define altsblock (*asblk.b_un.b_fs) 621558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 631558Srgrimes 64100935Sphkstatic void badsb(int listerr, const char *s); 6592839Simpstatic int calcsb(char *dev, int devfd, struct fs *fs); 6692839Simpstatic struct disklabel *getdisklabel(char *s, int fd); 671558Srgrimes 6823675Speter/* 6923675Speter * Read in a superblock finding an alternate if necessary. 70102231Strhodes * Return 1 if successful, 0 if unsuccessful, -1 if file system 7123675Speter * is already clean (preen mode only). 7223675Speter */ 737585Sbdeint 7492839Simpsetup(char *dev) 751558Srgrimes{ 7686514Siedowse long cg, asked, i, j; 7775557Smckusick long bmapsize; 781558Srgrimes struct stat statb; 791558Srgrimes struct fs proto; 8086514Siedowse size_t size; 811558Srgrimes 821558Srgrimes havesb = 0; 831558Srgrimes fswritefd = -1; 8462668Smckusick cursnapshot = 0; 851558Srgrimes if (stat(dev, &statb) < 0) { 861558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 8774556Smckusick if (bkgrdflag) { 8874556Smckusick unlink(snapname); 8974556Smckusick bkgrdflag = 0; 9074556Smckusick } 911558Srgrimes return (0); 921558Srgrimes } 9353781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9453781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9574556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9674556Smckusick unlink(snapname); 9774556Smckusick printf("background fsck lacks a snapshot\n"); 9874556Smckusick exit(EEXIT); 9974556Smckusick } 10074556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 10162668Smckusick cursnapshot = statb.st_ino; 10262668Smckusick } else { 10374556Smckusick if (cvtlevel == 0 || 10474556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10574556Smckusick if (preen && bkgrdflag) { 10674556Smckusick unlink(snapname); 10774556Smckusick bkgrdflag = 0; 10874556Smckusick } 10974556Smckusick pfatal("%s is not a disk device", dev); 11074556Smckusick if (reply("CONTINUE") == 0) { 11174556Smckusick if (bkgrdflag) { 11274556Smckusick unlink(snapname); 11374556Smckusick bkgrdflag = 0; 11474556Smckusick } 11574556Smckusick return (0); 11674556Smckusick } 11774556Smckusick } else { 11874556Smckusick if (bkgrdflag) { 11974556Smckusick unlink(snapname); 12074556Smckusick bkgrdflag = 0; 12174556Smckusick } 12274556Smckusick pfatal("cannot convert a snapshot"); 12374556Smckusick exit(EEXIT); 12474556Smckusick } 12562668Smckusick } 1261558Srgrimes } 1271558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 12874556Smckusick if (bkgrdflag) { 12974556Smckusick unlink(snapname); 13074556Smckusick bkgrdflag = 0; 13174556Smckusick } 1321558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1331558Srgrimes return (0); 1341558Srgrimes } 13574556Smckusick if (bkgrdflag) { 13674556Smckusick unlink(snapname); 13774556Smckusick size = MIBSIZE; 13874556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 13974556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 14074556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 14174556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 14274556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14374556Smckusick pfatal("kernel lacks background fsck support\n"); 14474556Smckusick exit(EEXIT); 14574556Smckusick } 14674556Smckusick cmd.version = FFS_CMD_VERSION; 14774556Smckusick cmd.handle = fsreadfd; 14874556Smckusick fswritefd = -1; 14974556Smckusick } 1501558Srgrimes if (preen == 0) 1511558Srgrimes printf("** %s", dev); 15274556Smckusick if (bkgrdflag == 0 && 15374556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1541558Srgrimes fswritefd = -1; 1551558Srgrimes if (preen) 1561558Srgrimes pfatal("NO WRITE ACCESS"); 1571558Srgrimes printf(" (NO WRITE)"); 1581558Srgrimes } 1591558Srgrimes if (preen == 0) 1601558Srgrimes printf("\n"); 1611558Srgrimes /* 1621558Srgrimes * Read in the superblock, looking for alternates if necessary 1631558Srgrimes */ 1641558Srgrimes if (readsb(1) == 0) { 16523675Speter skipclean = 0; 1661558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1671558Srgrimes return(0); 1681558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1691558Srgrimes return (0); 1701558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1711558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1721558Srgrimes if (readsb(0) != 0) 1731558Srgrimes break; 1741558Srgrimes } 1751558Srgrimes if (cg >= proto.fs_ncg) { 1761558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1771558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1781558Srgrimes "FAILED. YOU MUST USE THE", 1791558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1801558Srgrimes "LOCATION OF AN ALTERNATE", 1811558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1821558Srgrimes "INFORMATION; SEE fsck(8)."); 1836280Sbde bflag = 0; 1841558Srgrimes return(0); 1851558Srgrimes } 1861558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1876280Sbde bflag = 0; 1881558Srgrimes } 18975557Smckusick if (skipclean && preen && sblock.fs_clean) { 19041474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 19141474Sjulian return (-1); 19241474Sjulian } 1931558Srgrimes maxfsblock = sblock.fs_size; 1941558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1951558Srgrimes /* 1961558Srgrimes * Check and potentially fix certain fields in the super block. 1971558Srgrimes */ 1981558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1991558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 2001558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2011558Srgrimes sblock.fs_optim = FS_OPTTIME; 2021558Srgrimes sbdirty(); 2031558Srgrimes } 2041558Srgrimes } 2051558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2061558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2071558Srgrimes sblock.fs_minfree); 2081558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2091558Srgrimes sblock.fs_minfree = 10; 2101558Srgrimes sbdirty(); 2111558Srgrimes } 2121558Srgrimes } 21398542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 21498542Smckusick sblock.fs_old_inodefmt < FS_44INODEFMT) { 215102231Strhodes pwarn("Format of file system is too old.\n"); 21696483Sphk pwarn("Must update to modern format using a version of fsck\n"); 21796483Sphk pfatal("from before 2002 with the command ``fsck -c 2''\n"); 21896483Sphk exit(EEXIT); 2191558Srgrimes } 22023675Speter if (asblk.b_dirty && !bflag) { 22123675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2221558Srgrimes flush(fswritefd, &asblk); 2231558Srgrimes } 2241558Srgrimes /* 2251558Srgrimes * read in the summary info. 2261558Srgrimes */ 2271558Srgrimes asked = 0; 22871073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 2291558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2301558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2311558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 23271073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 2331558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2341558Srgrimes size) != 0 && !asked) { 2351558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 23634266Sjulian if (reply("CONTINUE") == 0) { 23734266Sjulian ckfini(0); 23823675Speter exit(EEXIT); 23934266Sjulian } 2401558Srgrimes asked++; 2411558Srgrimes } 2421558Srgrimes } 2431558Srgrimes /* 2441558Srgrimes * allocate and initialize the necessary maps 2451558Srgrimes */ 2461558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 2471558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2481558Srgrimes if (blockmap == NULL) { 2491558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2501558Srgrimes (unsigned)bmapsize); 2511558Srgrimes goto badsb; 2521558Srgrimes } 25341474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 25441474Sjulian sizeof(struct inostatlist)); 25541474Sjulian if (inostathead == NULL) { 25641474Sjulian printf("cannot alloc %u bytes for inostathead\n", 25741474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 2581558Srgrimes goto badsb; 2591558Srgrimes } 2601558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 26157573Smckusick dirhash = numdirs; 26234033Sphk if (numdirs == 0) { 26334033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 26434033Sphk goto badsb; 26534033Sphk } 2661558Srgrimes inplast = 0; 2671558Srgrimes listmax = numdirs + 10; 2681558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2691558Srgrimes sizeof(struct inoinfo *)); 2701558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2711558Srgrimes sizeof(struct inoinfo *)); 2721558Srgrimes if (inpsort == NULL || inphead == NULL) { 273101037Smux printf("cannot alloc %ju bytes for inphead\n", 274101037Smux (uintmax_t)numdirs * sizeof(struct inoinfo *)); 2751558Srgrimes goto badsb; 2761558Srgrimes } 2771558Srgrimes bufinit(); 27834266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 27934266Sjulian usedsoftdep = 1; 28034266Sjulian else 28134266Sjulian usedsoftdep = 0; 2821558Srgrimes return (1); 2831558Srgrimes 2841558Srgrimesbadsb: 28523675Speter ckfini(0); 2861558Srgrimes return (0); 2871558Srgrimes} 2881558Srgrimes 2891558Srgrimes/* 29098542Smckusick * Possible superblock locations ordered from most to least likely. 29198542Smckusick */ 29298542Smckusickstatic int sblock_try[] = SBLOCKSEARCH; 29398542Smckusick 29498542Smckusick/* 2951558Srgrimes * Read in the super block and its summary info. 2961558Srgrimes */ 29775557Smckusickint 29892839Simpreadsb(int listerr) 2991558Srgrimes{ 30098542Smckusick ufs2_daddr_t super; 30198542Smckusick int i; 3021558Srgrimes 30398542Smckusick if (bflag) { 30498542Smckusick super = bflag; 30598542Smckusick if ((bread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) 30698542Smckusick return (0); 30798542Smckusick } else { 30898542Smckusick for (i = 0; sblock_try[i] != -1; i++) { 30998542Smckusick super = sblock_try[i] / dev_bsize; 31098542Smckusick if ((bread(fsreadfd, (char *)&sblock, super, 31198542Smckusick (long)SBLOCKSIZE))) 31298542Smckusick return (0); 31398542Smckusick if ((sblock.fs_magic == FS_UFS1_MAGIC || 31498542Smckusick (sblock.fs_magic == FS_UFS2_MAGIC && 31598542Smckusick sblock.fs_sblockloc == 31698542Smckusick numfrags(&sblock, sblock_try[i]))) && 31798542Smckusick sblock.fs_ncg >= 1 && 31898542Smckusick sblock.fs_bsize >= SBLOCKSIZE && 31998542Smckusick sblock.fs_bsize >= sizeof(struct fs)) 32098542Smckusick break; 32198542Smckusick } 32298542Smckusick if (sblock_try[i] == -1) { 323102231Strhodes fprintf(stderr, "Cannot find file system superblock\n"); 32498542Smckusick return (0); 32598542Smckusick } 32698542Smckusick } 3271558Srgrimes /* 328102231Strhodes * Compute block size that the file system is based on, 3291558Srgrimes * according to fsbtodb, and adjust superblock block number 3301558Srgrimes * so we can tell if this is an alternate later. 3311558Srgrimes */ 3321558Srgrimes super *= dev_bsize; 3331558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3341558Srgrimes sblk.b_bno = super / dev_bsize; 33598542Smckusick sblk.b_size = SBLOCKSIZE; 3361558Srgrimes if (bflag) { 3371558Srgrimes havesb = 1; 3381558Srgrimes return (1); 3391558Srgrimes } 3401558Srgrimes /* 34194031Smckusick * Compare all fields that should not differ in alternate super block. 3421558Srgrimes * When an alternate super-block is specified this check is skipped. 3431558Srgrimes */ 3441558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3451558Srgrimes if (asblk.b_errs) 3461558Srgrimes return (0); 34794031Smckusick if (altsblock.fs_sblkno != sblock.fs_sblkno || 34894031Smckusick altsblock.fs_cblkno != sblock.fs_cblkno || 34994031Smckusick altsblock.fs_iblkno != sblock.fs_iblkno || 35094031Smckusick altsblock.fs_dblkno != sblock.fs_dblkno || 35194031Smckusick altsblock.fs_ncg != sblock.fs_ncg || 35294031Smckusick altsblock.fs_bsize != sblock.fs_bsize || 35394031Smckusick altsblock.fs_fsize != sblock.fs_fsize || 35494031Smckusick altsblock.fs_frag != sblock.fs_frag || 35594031Smckusick altsblock.fs_bmask != sblock.fs_bmask || 35694031Smckusick altsblock.fs_fmask != sblock.fs_fmask || 35794031Smckusick altsblock.fs_bshift != sblock.fs_bshift || 35894031Smckusick altsblock.fs_fshift != sblock.fs_fshift || 35994031Smckusick altsblock.fs_fragshift != sblock.fs_fragshift || 36094031Smckusick altsblock.fs_fsbtodb != sblock.fs_fsbtodb || 36194031Smckusick altsblock.fs_sbsize != sblock.fs_sbsize || 36294031Smckusick altsblock.fs_nindir != sblock.fs_nindir || 36394031Smckusick altsblock.fs_inopb != sblock.fs_inopb || 36494031Smckusick altsblock.fs_cssize != sblock.fs_cssize || 36594031Smckusick altsblock.fs_ipg != sblock.fs_ipg || 36694031Smckusick altsblock.fs_fpg != sblock.fs_fpg || 36794031Smckusick altsblock.fs_magic != sblock.fs_magic) { 3681558Srgrimes badsb(listerr, 3691558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 3701558Srgrimes return (0); 3711558Srgrimes } 37298542Smckusick /* 37398542Smckusick * If not yet done, update UFS1 superblock with new wider fields. 37498542Smckusick */ 37598542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 37698542Smckusick sblock.fs_maxbsize != sblock.fs_bsize) { 37798542Smckusick sblock.fs_maxbsize = sblock.fs_bsize; 37898542Smckusick sblock.fs_time = sblock.fs_old_time; 37998542Smckusick sblock.fs_size = sblock.fs_old_size; 38098542Smckusick sblock.fs_dsize = sblock.fs_old_dsize; 38198542Smckusick sblock.fs_csaddr = sblock.fs_old_csaddr; 38298542Smckusick sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 38398542Smckusick sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 38498542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 38598542Smckusick sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 38698542Smckusick } 3871558Srgrimes havesb = 1; 3881558Srgrimes return (1); 3891558Srgrimes} 3901558Srgrimes 3917585Sbdestatic void 392100935Sphkbadsb(int listerr, const char *s) 3931558Srgrimes{ 3941558Srgrimes 3951558Srgrimes if (!listerr) 3961558Srgrimes return; 3971558Srgrimes if (preen) 3981558Srgrimes printf("%s: ", cdevname); 3991558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4001558Srgrimes} 4011558Srgrimes 40275884Siedowsevoid 40392839Simpsblock_init(void) 40475557Smckusick{ 40575557Smckusick struct disklabel *lp; 40675557Smckusick 40775557Smckusick fswritefd = -1; 40875557Smckusick fsmodified = 0; 40975557Smckusick lfdir = 0; 41075557Smckusick initbarea(&sblk); 41175557Smckusick initbarea(&asblk); 41298542Smckusick sblk.b_un.b_buf = malloc(SBLOCKSIZE); 41398542Smckusick asblk.b_un.b_buf = malloc(SBLOCKSIZE); 41475557Smckusick if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 41575557Smckusick errx(EEXIT, "cannot allocate space for superblock"); 41675557Smckusick if ((lp = getdisklabel(NULL, fsreadfd))) 41775557Smckusick dev_bsize = secsize = lp->d_secsize; 41875557Smckusick else 41975557Smckusick dev_bsize = secsize = DEV_BSIZE; 42075557Smckusick} 42175557Smckusick 4221558Srgrimes/* 4231558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4241558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4251558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4261558Srgrimes * their needed information is available! 4271558Srgrimes */ 42823675Speterstatic int 42992839Simpcalcsb(char *dev, int devfd, struct fs *fs) 4301558Srgrimes{ 43192806Sobrien struct disklabel *lp; 43292806Sobrien struct partition *pp; 43392806Sobrien char *cp; 43498542Smckusick int i, nspf; 4351558Srgrimes 43623675Speter cp = strchr(dev, '\0') - 1; 4377585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4381558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4391558Srgrimes return (0); 4401558Srgrimes } 4411558Srgrimes lp = getdisklabel(dev, devfd); 4421558Srgrimes if (isdigit(*cp)) 4431558Srgrimes pp = &lp->d_partitions[0]; 4441558Srgrimes else 4451558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4461558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4471558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4481558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4491558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4501558Srgrimes return (0); 4511558Srgrimes } 45241474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 45341474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 45441474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 45541474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 45641474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 45732622Sbde return (0); 45832622Sbde } 45923675Speter memset(fs, 0, sizeof(struct fs)); 4601558Srgrimes fs->fs_fsize = pp->p_fsize; 4611558Srgrimes fs->fs_frag = pp->p_frag; 4621558Srgrimes fs->fs_size = pp->p_size; 46398542Smckusick fs->fs_sblkno = roundup( 46498542Smckusick howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 46598542Smckusick fs->fs_frag); 46698542Smckusick nspf = fs->fs_fsize / lp->d_secsize; 46798542Smckusick for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 4681558Srgrimes fs->fs_fsbtodb++; 4691558Srgrimes dev_bsize = lp->d_secsize; 47098542Smckusick if (fs->fs_magic == FS_UFS2_MAGIC) { 47198542Smckusick fs->fs_fpg = pp->p_cpg; 47298542Smckusick fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 47398542Smckusick } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 47498542Smckusick fs->fs_old_cpg = pp->p_cpg; 47598542Smckusick fs->fs_old_cgmask = 0xffffffff; 47698542Smckusick for (i = lp->d_ntracks; i > 1; i >>= 1) 47798542Smckusick fs->fs_old_cgmask <<= 1; 47898542Smckusick if (!POWEROF2(lp->d_ntracks)) 47998542Smckusick fs->fs_old_cgmask <<= 1; 48098542Smckusick fs->fs_old_cgoffset = roundup(howmany(lp->d_nsectors, nspf), 48198542Smckusick fs->fs_frag); 48298542Smckusick fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf; 48398542Smckusick fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl, 48498542Smckusick fs->fs_old_cpg); 48598542Smckusick } 4861558Srgrimes return (1); 4871558Srgrimes} 4881558Srgrimes 48923675Speterstatic struct disklabel * 49092839Simpgetdisklabel(char *s, int fd) 4911558Srgrimes{ 4921558Srgrimes static struct disklabel lab; 4931558Srgrimes 4941558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 4951558Srgrimes if (s == NULL) 4961558Srgrimes return ((struct disklabel *)NULL); 4971558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 49823675Speter errx(EEXIT, "%s: can't read disk label", s); 4991558Srgrimes } 5001558Srgrimes return (&lab); 5011558Srgrimes} 502