setup.c revision 107518
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 107518 2002-12-02 19:30:37Z mckusick $"; 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> 55103949Smike#include <limits.h> 56101037Smux#include <stdint.h> 571558Srgrimes#include <string.h> 5823675Speter 591558Srgrimes#include "fsck.h" 601558Srgrimes 611558Srgrimesstruct bufarea asblk; 621558Srgrimes#define altsblock (*asblk.b_un.b_fs) 631558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 641558Srgrimes 65100935Sphkstatic void badsb(int listerr, const char *s); 6692839Simpstatic int calcsb(char *dev, int devfd, struct fs *fs); 6792839Simpstatic struct disklabel *getdisklabel(char *s, int fd); 681558Srgrimes 6923675Speter/* 7023675Speter * Read in a superblock finding an alternate if necessary. 71102231Strhodes * Return 1 if successful, 0 if unsuccessful, -1 if file system 7223675Speter * is already clean (preen mode only). 7323675Speter */ 747585Sbdeint 7592839Simpsetup(char *dev) 761558Srgrimes{ 7786514Siedowse long cg, asked, i, j; 7875557Smckusick long bmapsize; 791558Srgrimes struct stat statb; 801558Srgrimes struct fs proto; 8186514Siedowse size_t size; 821558Srgrimes 831558Srgrimes havesb = 0; 841558Srgrimes fswritefd = -1; 8562668Smckusick cursnapshot = 0; 861558Srgrimes if (stat(dev, &statb) < 0) { 871558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 8874556Smckusick if (bkgrdflag) { 8974556Smckusick unlink(snapname); 9074556Smckusick bkgrdflag = 0; 9174556Smckusick } 921558Srgrimes return (0); 931558Srgrimes } 9453781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9553781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9674556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9774556Smckusick unlink(snapname); 9874556Smckusick printf("background fsck lacks a snapshot\n"); 9974556Smckusick exit(EEXIT); 10074556Smckusick } 10174556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 10262668Smckusick cursnapshot = statb.st_ino; 10362668Smckusick } else { 10474556Smckusick if (cvtlevel == 0 || 10574556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10674556Smckusick if (preen && bkgrdflag) { 10774556Smckusick unlink(snapname); 10874556Smckusick bkgrdflag = 0; 10974556Smckusick } 11074556Smckusick pfatal("%s is not a disk device", dev); 11174556Smckusick if (reply("CONTINUE") == 0) { 11274556Smckusick if (bkgrdflag) { 11374556Smckusick unlink(snapname); 11474556Smckusick bkgrdflag = 0; 11574556Smckusick } 11674556Smckusick return (0); 11774556Smckusick } 11874556Smckusick } else { 11974556Smckusick if (bkgrdflag) { 12074556Smckusick unlink(snapname); 12174556Smckusick bkgrdflag = 0; 12274556Smckusick } 12374556Smckusick pfatal("cannot convert a snapshot"); 12474556Smckusick exit(EEXIT); 12574556Smckusick } 12662668Smckusick } 1271558Srgrimes } 1281558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 12974556Smckusick if (bkgrdflag) { 13074556Smckusick unlink(snapname); 13174556Smckusick bkgrdflag = 0; 13274556Smckusick } 1331558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1341558Srgrimes return (0); 1351558Srgrimes } 13674556Smckusick if (bkgrdflag) { 13774556Smckusick unlink(snapname); 13874556Smckusick size = MIBSIZE; 13974556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 14074556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 14174556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 14274556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 14374556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14474556Smckusick pfatal("kernel lacks background fsck support\n"); 14574556Smckusick exit(EEXIT); 14674556Smckusick } 14774556Smckusick cmd.version = FFS_CMD_VERSION; 14874556Smckusick cmd.handle = fsreadfd; 14974556Smckusick fswritefd = -1; 15074556Smckusick } 1511558Srgrimes if (preen == 0) 1521558Srgrimes printf("** %s", dev); 15374556Smckusick if (bkgrdflag == 0 && 15474556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1551558Srgrimes fswritefd = -1; 1561558Srgrimes if (preen) 1571558Srgrimes pfatal("NO WRITE ACCESS"); 1581558Srgrimes printf(" (NO WRITE)"); 1591558Srgrimes } 1601558Srgrimes if (preen == 0) 1611558Srgrimes printf("\n"); 1621558Srgrimes /* 1631558Srgrimes * Read in the superblock, looking for alternates if necessary 1641558Srgrimes */ 1651558Srgrimes if (readsb(1) == 0) { 16623675Speter skipclean = 0; 1671558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1681558Srgrimes return(0); 1691558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1701558Srgrimes return (0); 1711558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1721558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1731558Srgrimes if (readsb(0) != 0) 1741558Srgrimes break; 1751558Srgrimes } 1761558Srgrimes if (cg >= proto.fs_ncg) { 1771558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1781558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1791558Srgrimes "FAILED. YOU MUST USE THE", 1801558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1811558Srgrimes "LOCATION OF AN ALTERNATE", 1821558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1831558Srgrimes "INFORMATION; SEE fsck(8)."); 1846280Sbde bflag = 0; 1851558Srgrimes return(0); 1861558Srgrimes } 1871558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 1886280Sbde bflag = 0; 1891558Srgrimes } 19075557Smckusick if (skipclean && preen && sblock.fs_clean) { 19141474Sjulian pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n"); 19241474Sjulian return (-1); 19341474Sjulian } 1941558Srgrimes maxfsblock = sblock.fs_size; 1951558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 1961558Srgrimes /* 1971558Srgrimes * Check and potentially fix certain fields in the super block. 1981558Srgrimes */ 1991558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 2001558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 2011558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2021558Srgrimes sblock.fs_optim = FS_OPTTIME; 2031558Srgrimes sbdirty(); 2041558Srgrimes } 2051558Srgrimes } 2061558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2071558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2081558Srgrimes sblock.fs_minfree); 2091558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2101558Srgrimes sblock.fs_minfree = 10; 2111558Srgrimes sbdirty(); 2121558Srgrimes } 2131558Srgrimes } 21498542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 21598542Smckusick sblock.fs_old_inodefmt < FS_44INODEFMT) { 216102231Strhodes pwarn("Format of file system is too old.\n"); 21796483Sphk pwarn("Must update to modern format using a version of fsck\n"); 21896483Sphk pfatal("from before 2002 with the command ``fsck -c 2''\n"); 21996483Sphk exit(EEXIT); 2201558Srgrimes } 22123675Speter if (asblk.b_dirty && !bflag) { 22223675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2231558Srgrimes flush(fswritefd, &asblk); 2241558Srgrimes } 2251558Srgrimes /* 2261558Srgrimes * read in the summary info. 2271558Srgrimes */ 2281558Srgrimes asked = 0; 22971073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 2301558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2311558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2321558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 23371073Siedowse if (bread(fsreadfd, (char *)sblock.fs_csp + i, 2341558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2351558Srgrimes size) != 0 && !asked) { 2361558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 23734266Sjulian if (reply("CONTINUE") == 0) { 23834266Sjulian ckfini(0); 23923675Speter exit(EEXIT); 24034266Sjulian } 2411558Srgrimes asked++; 2421558Srgrimes } 2431558Srgrimes } 2441558Srgrimes /* 2451558Srgrimes * allocate and initialize the necessary maps 2461558Srgrimes */ 247103949Smike bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); 2481558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2491558Srgrimes if (blockmap == NULL) { 2501558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2511558Srgrimes (unsigned)bmapsize); 2521558Srgrimes goto badsb; 2531558Srgrimes } 25441474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 25541474Sjulian sizeof(struct inostatlist)); 25641474Sjulian if (inostathead == NULL) { 25741474Sjulian printf("cannot alloc %u bytes for inostathead\n", 25841474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 2591558Srgrimes goto badsb; 2601558Srgrimes } 261107518Smckusick numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128); 26257573Smckusick dirhash = numdirs; 2631558Srgrimes inplast = 0; 2641558Srgrimes listmax = numdirs + 10; 2651558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2661558Srgrimes sizeof(struct inoinfo *)); 2671558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2681558Srgrimes sizeof(struct inoinfo *)); 2691558Srgrimes if (inpsort == NULL || inphead == NULL) { 270101037Smux printf("cannot alloc %ju bytes for inphead\n", 271101037Smux (uintmax_t)numdirs * sizeof(struct inoinfo *)); 2721558Srgrimes goto badsb; 2731558Srgrimes } 2741558Srgrimes bufinit(); 27534266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 27634266Sjulian usedsoftdep = 1; 27734266Sjulian else 27834266Sjulian usedsoftdep = 0; 2791558Srgrimes return (1); 2801558Srgrimes 2811558Srgrimesbadsb: 28223675Speter ckfini(0); 2831558Srgrimes return (0); 2841558Srgrimes} 2851558Srgrimes 2861558Srgrimes/* 28798542Smckusick * Possible superblock locations ordered from most to least likely. 28898542Smckusick */ 28998542Smckusickstatic int sblock_try[] = SBLOCKSEARCH; 29098542Smckusick 29198542Smckusick/* 2921558Srgrimes * Read in the super block and its summary info. 2931558Srgrimes */ 29475557Smckusickint 29592839Simpreadsb(int listerr) 2961558Srgrimes{ 29798542Smckusick ufs2_daddr_t super; 29898542Smckusick int i; 2991558Srgrimes 30098542Smckusick if (bflag) { 30198542Smckusick super = bflag; 30298542Smckusick if ((bread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) 30398542Smckusick return (0); 304107518Smckusick if (sblock.fs_magic != FS_UFS1_MAGIC && 305107518Smckusick sblock.fs_magic != FS_UFS2_MAGIC) { 306107518Smckusick fprintf(stderr, "%d is not a file system superblock\n", 307107518Smckusick bflag); 308107518Smckusick return (0); 309107518Smckusick } 31098542Smckusick } else { 31198542Smckusick for (i = 0; sblock_try[i] != -1; i++) { 31298542Smckusick super = sblock_try[i] / dev_bsize; 31398542Smckusick if ((bread(fsreadfd, (char *)&sblock, super, 31498542Smckusick (long)SBLOCKSIZE))) 31598542Smckusick return (0); 31698542Smckusick if ((sblock.fs_magic == FS_UFS1_MAGIC || 31798542Smckusick (sblock.fs_magic == FS_UFS2_MAGIC && 318107294Smckusick sblock.fs_sblockloc == sblock_try[i])) && 31998542Smckusick sblock.fs_ncg >= 1 && 320104745Smckusick sblock.fs_bsize >= MINBSIZE && 32198542Smckusick sblock.fs_bsize >= sizeof(struct fs)) 32298542Smckusick break; 32398542Smckusick } 32498542Smckusick if (sblock_try[i] == -1) { 325102231Strhodes fprintf(stderr, "Cannot find file system superblock\n"); 32698542Smckusick return (0); 32798542Smckusick } 32898542Smckusick } 3291558Srgrimes /* 330102231Strhodes * Compute block size that the file system is based on, 3311558Srgrimes * according to fsbtodb, and adjust superblock block number 3321558Srgrimes * so we can tell if this is an alternate later. 3331558Srgrimes */ 3341558Srgrimes super *= dev_bsize; 3351558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3361558Srgrimes sblk.b_bno = super / dev_bsize; 33798542Smckusick sblk.b_size = SBLOCKSIZE; 338107518Smckusick if (bflag) 339107518Smckusick goto out; 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 } 372107518Smckusickout: 37398542Smckusick /* 37498542Smckusick * If not yet done, update UFS1 superblock with new wider fields. 37598542Smckusick */ 37698542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 37798542Smckusick sblock.fs_maxbsize != sblock.fs_bsize) { 37898542Smckusick sblock.fs_maxbsize = sblock.fs_bsize; 37998542Smckusick sblock.fs_time = sblock.fs_old_time; 38098542Smckusick sblock.fs_size = sblock.fs_old_size; 38198542Smckusick sblock.fs_dsize = sblock.fs_old_dsize; 38298542Smckusick sblock.fs_csaddr = sblock.fs_old_csaddr; 38398542Smckusick sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 38498542Smckusick sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 38598542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 38698542Smckusick sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 38798542Smckusick } 3881558Srgrimes havesb = 1; 3891558Srgrimes return (1); 3901558Srgrimes} 3911558Srgrimes 3927585Sbdestatic void 393100935Sphkbadsb(int listerr, const char *s) 3941558Srgrimes{ 3951558Srgrimes 3961558Srgrimes if (!listerr) 3971558Srgrimes return; 3981558Srgrimes if (preen) 3991558Srgrimes printf("%s: ", cdevname); 4001558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4011558Srgrimes} 4021558Srgrimes 40375884Siedowsevoid 40492839Simpsblock_init(void) 40575557Smckusick{ 40675557Smckusick struct disklabel *lp; 40775557Smckusick 40875557Smckusick fswritefd = -1; 40975557Smckusick fsmodified = 0; 41075557Smckusick lfdir = 0; 41175557Smckusick initbarea(&sblk); 41275557Smckusick initbarea(&asblk); 41398542Smckusick sblk.b_un.b_buf = malloc(SBLOCKSIZE); 41498542Smckusick asblk.b_un.b_buf = malloc(SBLOCKSIZE); 41575557Smckusick if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 41675557Smckusick errx(EEXIT, "cannot allocate space for superblock"); 41775557Smckusick if ((lp = getdisklabel(NULL, fsreadfd))) 41875557Smckusick dev_bsize = secsize = lp->d_secsize; 41975557Smckusick else 42075557Smckusick dev_bsize = secsize = DEV_BSIZE; 42175557Smckusick} 42275557Smckusick 4231558Srgrimes/* 4241558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4251558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4261558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4271558Srgrimes * their needed information is available! 4281558Srgrimes */ 42923675Speterstatic int 43092839Simpcalcsb(char *dev, int devfd, struct fs *fs) 4311558Srgrimes{ 43292806Sobrien struct disklabel *lp; 43392806Sobrien struct partition *pp; 43492806Sobrien char *cp; 43598542Smckusick int i, nspf; 4361558Srgrimes 43723675Speter cp = strchr(dev, '\0') - 1; 4387585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4391558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4401558Srgrimes return (0); 4411558Srgrimes } 4421558Srgrimes lp = getdisklabel(dev, devfd); 4431558Srgrimes if (isdigit(*cp)) 4441558Srgrimes pp = &lp->d_partitions[0]; 4451558Srgrimes else 4461558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4471558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4481558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4491558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4501558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4511558Srgrimes return (0); 4521558Srgrimes } 45341474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 45441474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 45541474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 45641474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 45741474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 45832622Sbde return (0); 45932622Sbde } 46023675Speter memset(fs, 0, sizeof(struct fs)); 4611558Srgrimes fs->fs_fsize = pp->p_fsize; 4621558Srgrimes fs->fs_frag = pp->p_frag; 4631558Srgrimes fs->fs_size = pp->p_size; 46498542Smckusick fs->fs_sblkno = roundup( 46598542Smckusick howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 46698542Smckusick fs->fs_frag); 46798542Smckusick nspf = fs->fs_fsize / lp->d_secsize; 46898542Smckusick for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 4691558Srgrimes fs->fs_fsbtodb++; 4701558Srgrimes dev_bsize = lp->d_secsize; 47198542Smckusick if (fs->fs_magic == FS_UFS2_MAGIC) { 47298542Smckusick fs->fs_fpg = pp->p_cpg; 47398542Smckusick fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 47498542Smckusick } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 47598542Smckusick fs->fs_old_cpg = pp->p_cpg; 47698542Smckusick fs->fs_old_cgmask = 0xffffffff; 47798542Smckusick for (i = lp->d_ntracks; i > 1; i >>= 1) 47898542Smckusick fs->fs_old_cgmask <<= 1; 47998542Smckusick if (!POWEROF2(lp->d_ntracks)) 48098542Smckusick fs->fs_old_cgmask <<= 1; 48198542Smckusick fs->fs_old_cgoffset = roundup(howmany(lp->d_nsectors, nspf), 48298542Smckusick fs->fs_frag); 48398542Smckusick fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf; 48498542Smckusick fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl, 48598542Smckusick fs->fs_old_cpg); 48698542Smckusick } 4871558Srgrimes return (1); 4881558Srgrimes} 4891558Srgrimes 49023675Speterstatic struct disklabel * 49192839Simpgetdisklabel(char *s, int fd) 4921558Srgrimes{ 4931558Srgrimes static struct disklabel lab; 4941558Srgrimes 4951558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 4961558Srgrimes if (s == NULL) 4971558Srgrimes return ((struct disklabel *)NULL); 4981558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 49923675Speter errx(EEXIT, "%s: can't read disk label", s); 5001558Srgrimes } 5011558Srgrimes return (&lab); 5021558Srgrimes} 503