setup.c revision 100935
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 100935 2002-07-30 13:01:25Z phk $"; 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 63100935Sphkstatic void badsb(int listerr, const char *s); 6492839Simpstatic int calcsb(char *dev, int devfd, struct fs *fs); 6592839Simpstatic struct disklabel *getdisklabel(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 7392839Simpsetup(char *dev) 741558Srgrimes{ 7586514Siedowse long cg, asked, i, j; 7675557Smckusick long bmapsize; 771558Srgrimes struct stat statb; 781558Srgrimes struct fs proto; 7986514Siedowse size_t size; 801558Srgrimes 811558Srgrimes havesb = 0; 821558Srgrimes fswritefd = -1; 8362668Smckusick cursnapshot = 0; 841558Srgrimes if (stat(dev, &statb) < 0) { 851558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 8674556Smckusick if (bkgrdflag) { 8774556Smckusick unlink(snapname); 8874556Smckusick bkgrdflag = 0; 8974556Smckusick } 901558Srgrimes return (0); 911558Srgrimes } 9253781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9353781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9474556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9574556Smckusick unlink(snapname); 9674556Smckusick printf("background fsck lacks a snapshot\n"); 9774556Smckusick exit(EEXIT); 9874556Smckusick } 9974556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 10062668Smckusick cursnapshot = statb.st_ino; 10162668Smckusick } else { 10274556Smckusick if (cvtlevel == 0 || 10374556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10474556Smckusick if (preen && bkgrdflag) { 10574556Smckusick unlink(snapname); 10674556Smckusick bkgrdflag = 0; 10774556Smckusick } 10874556Smckusick pfatal("%s is not a disk device", dev); 10974556Smckusick if (reply("CONTINUE") == 0) { 11074556Smckusick if (bkgrdflag) { 11174556Smckusick unlink(snapname); 11274556Smckusick bkgrdflag = 0; 11374556Smckusick } 11474556Smckusick return (0); 11574556Smckusick } 11674556Smckusick } else { 11774556Smckusick if (bkgrdflag) { 11874556Smckusick unlink(snapname); 11974556Smckusick bkgrdflag = 0; 12074556Smckusick } 12174556Smckusick pfatal("cannot convert a snapshot"); 12274556Smckusick exit(EEXIT); 12374556Smckusick } 12462668Smckusick } 1251558Srgrimes } 1261558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 12774556Smckusick if (bkgrdflag) { 12874556Smckusick unlink(snapname); 12974556Smckusick bkgrdflag = 0; 13074556Smckusick } 1311558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1321558Srgrimes return (0); 1331558Srgrimes } 13474556Smckusick if (bkgrdflag) { 13574556Smckusick unlink(snapname); 13674556Smckusick size = MIBSIZE; 13774556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 13874556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 13974556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 14074556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 14174556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14274556Smckusick pfatal("kernel lacks background fsck support\n"); 14374556Smckusick exit(EEXIT); 14474556Smckusick } 14574556Smckusick cmd.version = FFS_CMD_VERSION; 14674556Smckusick cmd.handle = fsreadfd; 14774556Smckusick fswritefd = -1; 14874556Smckusick } 1491558Srgrimes if (preen == 0) 1501558Srgrimes printf("** %s", dev); 15174556Smckusick if (bkgrdflag == 0 && 15274556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1531558Srgrimes fswritefd = -1; 1541558Srgrimes if (preen) 1551558Srgrimes pfatal("NO WRITE ACCESS"); 1561558Srgrimes printf(" (NO WRITE)"); 1571558Srgrimes } 1581558Srgrimes if (preen == 0) 1591558Srgrimes printf("\n"); 1601558Srgrimes /* 1611558Srgrimes * Read in the superblock, looking for alternates if necessary 1621558Srgrimes */ 1631558Srgrimes if (readsb(1) == 0) { 16423675Speter skipclean = 0; 1651558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1661558Srgrimes return(0); 1671558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1681558Srgrimes return (0); 1691558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1701558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1711558Srgrimes if (readsb(0) != 0) 1721558Srgrimes break; 1731558Srgrimes } 1741558Srgrimes if (cg >= proto.fs_ncg) { 1751558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1761558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1771558Srgrimes "FAILED. YOU MUST USE THE", 1781558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1791558Srgrimes "LOCATION OF AN ALTERNATE", 1801558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1811558Srgrimes "INFORMATION; SEE fsck(8)."); 1826280Sbde bflag = 0; 1831558Srgrimes return(0); 1841558Srgrimes } 1851558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1866280Sbde bflag = 0; 1871558Srgrimes } 18875557Smckusick if (skipclean && preen && sblock.fs_clean) { 18941474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 19041474Sjulian return (-1); 19141474Sjulian } 1921558Srgrimes maxfsblock = sblock.fs_size; 1931558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1941558Srgrimes /* 1951558Srgrimes * Check and potentially fix certain fields in the super block. 1961558Srgrimes */ 1971558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 1981558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 1991558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2001558Srgrimes sblock.fs_optim = FS_OPTTIME; 2011558Srgrimes sbdirty(); 2021558Srgrimes } 2031558Srgrimes } 2041558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2051558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2061558Srgrimes sblock.fs_minfree); 2071558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2081558Srgrimes sblock.fs_minfree = 10; 2091558Srgrimes sbdirty(); 2101558Srgrimes } 2111558Srgrimes } 21298542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 21398542Smckusick sblock.fs_old_inodefmt < FS_44INODEFMT) { 21496483Sphk pwarn("Format of filesystem is too old.\n"); 21596483Sphk pwarn("Must update to modern format using a version of fsck\n"); 21696483Sphk pfatal("from before 2002 with the command ``fsck -c 2''\n"); 21796483Sphk exit(EEXIT); 2181558Srgrimes } 21923675Speter if (asblk.b_dirty && !bflag) { 22023675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2211558Srgrimes flush(fswritefd, &asblk); 2221558Srgrimes } 2231558Srgrimes /* 2241558Srgrimes * read in the summary info. 2251558Srgrimes */ 2261558Srgrimes asked = 0; 22771073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 2281558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2291558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2301558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 23171073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 2321558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2331558Srgrimes size) != 0 && !asked) { 2341558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 23534266Sjulian if (reply("CONTINUE") == 0) { 23634266Sjulian ckfini(0); 23723675Speter exit(EEXIT); 23834266Sjulian } 2391558Srgrimes asked++; 2401558Srgrimes } 2411558Srgrimes } 2421558Srgrimes /* 2431558Srgrimes * allocate and initialize the necessary maps 2441558Srgrimes */ 2451558Srgrimes bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short)); 2461558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2471558Srgrimes if (blockmap == NULL) { 2481558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2491558Srgrimes (unsigned)bmapsize); 2501558Srgrimes goto badsb; 2511558Srgrimes } 25241474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 25341474Sjulian sizeof(struct inostatlist)); 25441474Sjulian if (inostathead == NULL) { 25541474Sjulian printf("cannot alloc %u bytes for inostathead\n", 25641474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 2571558Srgrimes goto badsb; 2581558Srgrimes } 2591558Srgrimes numdirs = sblock.fs_cstotal.cs_ndir; 26057573Smckusick dirhash = numdirs; 26134033Sphk if (numdirs == 0) { 26234033Sphk printf("numdirs is zero, try using an alternate superblock\n"); 26334033Sphk goto badsb; 26434033Sphk } 2651558Srgrimes inplast = 0; 2661558Srgrimes listmax = numdirs + 10; 2671558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2681558Srgrimes sizeof(struct inoinfo *)); 2691558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2701558Srgrimes sizeof(struct inoinfo *)); 2711558Srgrimes if (inpsort == NULL || inphead == NULL) { 2728871Srgrimes printf("cannot alloc %u bytes for inphead\n", 2731558Srgrimes (unsigned)numdirs * sizeof(struct inoinfo *)); 2741558Srgrimes goto badsb; 2751558Srgrimes } 2761558Srgrimes bufinit(); 27734266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 27834266Sjulian usedsoftdep = 1; 27934266Sjulian else 28034266Sjulian usedsoftdep = 0; 2811558Srgrimes return (1); 2821558Srgrimes 2831558Srgrimesbadsb: 28423675Speter ckfini(0); 2851558Srgrimes return (0); 2861558Srgrimes} 2871558Srgrimes 2881558Srgrimes/* 28998542Smckusick * Possible superblock locations ordered from most to least likely. 29098542Smckusick */ 29198542Smckusickstatic int sblock_try[] = SBLOCKSEARCH; 29298542Smckusick 29398542Smckusick/* 2941558Srgrimes * Read in the super block and its summary info. 2951558Srgrimes */ 29675557Smckusickint 29792839Simpreadsb(int listerr) 2981558Srgrimes{ 29998542Smckusick ufs2_daddr_t super; 30098542Smckusick int i; 3011558Srgrimes 30298542Smckusick if (bflag) { 30398542Smckusick super = bflag; 30498542Smckusick if ((bread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) 30598542Smckusick return (0); 30698542Smckusick } else { 30798542Smckusick for (i = 0; sblock_try[i] != -1; i++) { 30898542Smckusick super = sblock_try[i] / dev_bsize; 30998542Smckusick if ((bread(fsreadfd, (char *)&sblock, super, 31098542Smckusick (long)SBLOCKSIZE))) 31198542Smckusick return (0); 31298542Smckusick if ((sblock.fs_magic == FS_UFS1_MAGIC || 31398542Smckusick (sblock.fs_magic == FS_UFS2_MAGIC && 31498542Smckusick sblock.fs_sblockloc == 31598542Smckusick numfrags(&sblock, sblock_try[i]))) && 31698542Smckusick sblock.fs_ncg >= 1 && 31798542Smckusick sblock.fs_bsize >= SBLOCKSIZE && 31898542Smckusick sblock.fs_bsize >= sizeof(struct fs)) 31998542Smckusick break; 32098542Smckusick } 32198542Smckusick if (sblock_try[i] == -1) { 32298542Smckusick fprintf(stderr, "Cannot find filesystem superblock\n"); 32398542Smckusick return (0); 32498542Smckusick } 32598542Smckusick } 3261558Srgrimes /* 3271558Srgrimes * Compute block size that the filesystem is based on, 3281558Srgrimes * according to fsbtodb, and adjust superblock block number 3291558Srgrimes * so we can tell if this is an alternate later. 3301558Srgrimes */ 3311558Srgrimes super *= dev_bsize; 3321558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3331558Srgrimes sblk.b_bno = super / dev_bsize; 33498542Smckusick sblk.b_size = SBLOCKSIZE; 3351558Srgrimes if (bflag) { 3361558Srgrimes havesb = 1; 3371558Srgrimes return (1); 3381558Srgrimes } 3391558Srgrimes /* 34094031Smckusick * Compare all fields that should not differ in alternate super block. 3411558Srgrimes * When an alternate super-block is specified this check is skipped. 3421558Srgrimes */ 3431558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3441558Srgrimes if (asblk.b_errs) 3451558Srgrimes return (0); 34694031Smckusick if (altsblock.fs_sblkno != sblock.fs_sblkno || 34794031Smckusick altsblock.fs_cblkno != sblock.fs_cblkno || 34894031Smckusick altsblock.fs_iblkno != sblock.fs_iblkno || 34994031Smckusick altsblock.fs_dblkno != sblock.fs_dblkno || 35094031Smckusick altsblock.fs_ncg != sblock.fs_ncg || 35194031Smckusick altsblock.fs_bsize != sblock.fs_bsize || 35294031Smckusick altsblock.fs_fsize != sblock.fs_fsize || 35394031Smckusick altsblock.fs_frag != sblock.fs_frag || 35494031Smckusick altsblock.fs_bmask != sblock.fs_bmask || 35594031Smckusick altsblock.fs_fmask != sblock.fs_fmask || 35694031Smckusick altsblock.fs_bshift != sblock.fs_bshift || 35794031Smckusick altsblock.fs_fshift != sblock.fs_fshift || 35894031Smckusick altsblock.fs_fragshift != sblock.fs_fragshift || 35994031Smckusick altsblock.fs_fsbtodb != sblock.fs_fsbtodb || 36094031Smckusick altsblock.fs_sbsize != sblock.fs_sbsize || 36194031Smckusick altsblock.fs_nindir != sblock.fs_nindir || 36294031Smckusick altsblock.fs_inopb != sblock.fs_inopb || 36394031Smckusick altsblock.fs_cssize != sblock.fs_cssize || 36494031Smckusick altsblock.fs_ipg != sblock.fs_ipg || 36594031Smckusick altsblock.fs_fpg != sblock.fs_fpg || 36694031Smckusick altsblock.fs_magic != sblock.fs_magic) { 3671558Srgrimes badsb(listerr, 3681558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 3691558Srgrimes return (0); 3701558Srgrimes } 37198542Smckusick /* 37298542Smckusick * If not yet done, update UFS1 superblock with new wider fields. 37398542Smckusick */ 37498542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 37598542Smckusick sblock.fs_maxbsize != sblock.fs_bsize) { 37698542Smckusick sblock.fs_maxbsize = sblock.fs_bsize; 37798542Smckusick sblock.fs_time = sblock.fs_old_time; 37898542Smckusick sblock.fs_size = sblock.fs_old_size; 37998542Smckusick sblock.fs_dsize = sblock.fs_old_dsize; 38098542Smckusick sblock.fs_csaddr = sblock.fs_old_csaddr; 38198542Smckusick sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 38298542Smckusick sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 38398542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 38498542Smckusick sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 38598542Smckusick } 3861558Srgrimes havesb = 1; 3871558Srgrimes return (1); 3881558Srgrimes} 3891558Srgrimes 3907585Sbdestatic void 391100935Sphkbadsb(int listerr, const char *s) 3921558Srgrimes{ 3931558Srgrimes 3941558Srgrimes if (!listerr) 3951558Srgrimes return; 3961558Srgrimes if (preen) 3971558Srgrimes printf("%s: ", cdevname); 3981558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 3991558Srgrimes} 4001558Srgrimes 40175884Siedowsevoid 40292839Simpsblock_init(void) 40375557Smckusick{ 40475557Smckusick struct disklabel *lp; 40575557Smckusick 40675557Smckusick fswritefd = -1; 40775557Smckusick fsmodified = 0; 40875557Smckusick lfdir = 0; 40975557Smckusick initbarea(&sblk); 41075557Smckusick initbarea(&asblk); 41198542Smckusick sblk.b_un.b_buf = malloc(SBLOCKSIZE); 41298542Smckusick asblk.b_un.b_buf = malloc(SBLOCKSIZE); 41375557Smckusick if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 41475557Smckusick errx(EEXIT, "cannot allocate space for superblock"); 41575557Smckusick if ((lp = getdisklabel(NULL, fsreadfd))) 41675557Smckusick dev_bsize = secsize = lp->d_secsize; 41775557Smckusick else 41875557Smckusick dev_bsize = secsize = DEV_BSIZE; 41975557Smckusick} 42075557Smckusick 4211558Srgrimes/* 4221558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4231558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4241558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4251558Srgrimes * their needed information is available! 4261558Srgrimes */ 42723675Speterstatic int 42892839Simpcalcsb(char *dev, int devfd, struct fs *fs) 4291558Srgrimes{ 43092806Sobrien struct disklabel *lp; 43192806Sobrien struct partition *pp; 43292806Sobrien char *cp; 43398542Smckusick int i, nspf; 4341558Srgrimes 43523675Speter cp = strchr(dev, '\0') - 1; 4367585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4371558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4381558Srgrimes return (0); 4391558Srgrimes } 4401558Srgrimes lp = getdisklabel(dev, devfd); 4411558Srgrimes if (isdigit(*cp)) 4421558Srgrimes pp = &lp->d_partitions[0]; 4431558Srgrimes else 4441558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4451558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4461558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4471558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4481558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4491558Srgrimes return (0); 4501558Srgrimes } 45141474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 45241474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 45341474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 45441474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 45541474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 45632622Sbde return (0); 45732622Sbde } 45823675Speter memset(fs, 0, sizeof(struct fs)); 4591558Srgrimes fs->fs_fsize = pp->p_fsize; 4601558Srgrimes fs->fs_frag = pp->p_frag; 4611558Srgrimes fs->fs_size = pp->p_size; 46298542Smckusick fs->fs_sblkno = roundup( 46398542Smckusick howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 46498542Smckusick fs->fs_frag); 46598542Smckusick nspf = fs->fs_fsize / lp->d_secsize; 46698542Smckusick for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 4671558Srgrimes fs->fs_fsbtodb++; 4681558Srgrimes dev_bsize = lp->d_secsize; 46998542Smckusick if (fs->fs_magic == FS_UFS2_MAGIC) { 47098542Smckusick fs->fs_fpg = pp->p_cpg; 47198542Smckusick fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 47298542Smckusick } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 47398542Smckusick fs->fs_old_cpg = pp->p_cpg; 47498542Smckusick fs->fs_old_cgmask = 0xffffffff; 47598542Smckusick for (i = lp->d_ntracks; i > 1; i >>= 1) 47698542Smckusick fs->fs_old_cgmask <<= 1; 47798542Smckusick if (!POWEROF2(lp->d_ntracks)) 47898542Smckusick fs->fs_old_cgmask <<= 1; 47998542Smckusick fs->fs_old_cgoffset = roundup(howmany(lp->d_nsectors, nspf), 48098542Smckusick fs->fs_frag); 48198542Smckusick fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf; 48298542Smckusick fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl, 48398542Smckusick fs->fs_old_cpg); 48498542Smckusick } 4851558Srgrimes return (1); 4861558Srgrimes} 4871558Srgrimes 48823675Speterstatic struct disklabel * 48992839Simpgetdisklabel(char *s, int fd) 4901558Srgrimes{ 4911558Srgrimes static struct disklabel lab; 4921558Srgrimes 4931558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 4941558Srgrimes if (s == NULL) 4951558Srgrimes return ((struct disklabel *)NULL); 4961558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 49723675Speter errx(EEXIT, "%s: can't read disk label", s); 4981558Srgrimes } 4991558Srgrimes return (&lab); 5001558Srgrimes} 501