setup.c revision 176573
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 * 4. Neither the name of the University nor the names of its contributors 141558Srgrimes * may be used to endorse or promote products derived from this software 151558Srgrimes * without specific prior written permission. 161558Srgrimes * 171558Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 181558Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 191558Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 201558Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 211558Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 221558Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 231558Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 241558Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 251558Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 261558Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 271558Srgrimes * SUCH DAMAGE. 281558Srgrimes */ 291558Srgrimes 30114589Sobrien#if 0 311558Srgrimes#ifndef lint 3223675Speterstatic const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; 33114589Sobrien#endif /* not lint */ 3441477Sjulian#endif 35114589Sobrien#include <sys/cdefs.h> 36114589Sobrien__FBSDID("$FreeBSD: head/sbin/fsck_ffs/setup.c 176573 2008-02-26 03:03:17Z delphij $"); 371558Srgrimes 381558Srgrimes#include <sys/param.h> 391558Srgrimes#include <sys/stat.h> 40101994Sbmilekic#define FSTYPENAMES 411558Srgrimes#include <sys/disklabel.h> 421558Srgrimes#include <sys/file.h> 4386514Siedowse#include <sys/sysctl.h> 4423675Speter 4523675Speter#include <ufs/ufs/dinode.h> 4623675Speter#include <ufs/ffs/fs.h> 4723675Speter 4823675Speter#include <ctype.h> 4923675Speter#include <err.h> 501558Srgrimes#include <errno.h> 51103949Smike#include <limits.h> 52101037Smux#include <stdint.h> 531558Srgrimes#include <string.h> 5423675Speter 551558Srgrimes#include "fsck.h" 561558Srgrimes 571558Srgrimesstruct bufarea asblk; 581558Srgrimes#define altsblock (*asblk.b_un.b_fs) 591558Srgrimes#define POWEROF2(num) (((num) & ((num) - 1)) == 0) 601558Srgrimes 61100935Sphkstatic void badsb(int listerr, const char *s); 6292839Simpstatic int calcsb(char *dev, int devfd, struct fs *fs); 6392839Simpstatic struct disklabel *getdisklabel(char *s, int fd); 641558Srgrimes 6523675Speter/* 6623675Speter * Read in a superblock finding an alternate if necessary. 67102231Strhodes * Return 1 if successful, 0 if unsuccessful, -1 if file system 6823675Speter * is already clean (preen mode only). 6923675Speter */ 707585Sbdeint 7192839Simpsetup(char *dev) 721558Srgrimes{ 7386514Siedowse long cg, asked, i, j; 7475557Smckusick long bmapsize; 751558Srgrimes struct stat statb; 761558Srgrimes struct fs proto; 7786514Siedowse size_t size; 781558Srgrimes 791558Srgrimes havesb = 0; 801558Srgrimes fswritefd = -1; 8162668Smckusick cursnapshot = 0; 821558Srgrimes if (stat(dev, &statb) < 0) { 831558Srgrimes printf("Can't stat %s: %s\n", dev, strerror(errno)); 8474556Smckusick if (bkgrdflag) { 8574556Smckusick unlink(snapname); 8674556Smckusick bkgrdflag = 0; 8774556Smckusick } 881558Srgrimes return (0); 891558Srgrimes } 9053781Sphk if ((statb.st_mode & S_IFMT) != S_IFCHR && 9153781Sphk (statb.st_mode & S_IFMT) != S_IFBLK) { 9274556Smckusick if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { 9374556Smckusick unlink(snapname); 9474556Smckusick printf("background fsck lacks a snapshot\n"); 9574556Smckusick exit(EEXIT); 9674556Smckusick } 9774556Smckusick if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { 9862668Smckusick cursnapshot = statb.st_ino; 9962668Smckusick } else { 10074556Smckusick if (cvtlevel == 0 || 10174556Smckusick (statb.st_flags & SF_SNAPSHOT) == 0) { 10274556Smckusick if (preen && bkgrdflag) { 10374556Smckusick unlink(snapname); 10474556Smckusick bkgrdflag = 0; 10574556Smckusick } 10674556Smckusick pfatal("%s is not a disk device", dev); 10774556Smckusick if (reply("CONTINUE") == 0) { 10874556Smckusick if (bkgrdflag) { 10974556Smckusick unlink(snapname); 11074556Smckusick bkgrdflag = 0; 11174556Smckusick } 11274556Smckusick return (0); 11374556Smckusick } 11474556Smckusick } else { 11574556Smckusick if (bkgrdflag) { 11674556Smckusick unlink(snapname); 11774556Smckusick bkgrdflag = 0; 11874556Smckusick } 11974556Smckusick pfatal("cannot convert a snapshot"); 12074556Smckusick exit(EEXIT); 12174556Smckusick } 12262668Smckusick } 1231558Srgrimes } 1241558Srgrimes if ((fsreadfd = open(dev, O_RDONLY)) < 0) { 12574556Smckusick if (bkgrdflag) { 12674556Smckusick unlink(snapname); 12774556Smckusick bkgrdflag = 0; 12874556Smckusick } 1291558Srgrimes printf("Can't open %s: %s\n", dev, strerror(errno)); 1301558Srgrimes return (0); 1311558Srgrimes } 13274556Smckusick if (bkgrdflag) { 13374556Smckusick unlink(snapname); 13474556Smckusick size = MIBSIZE; 13574556Smckusick if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| 13674556Smckusick sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| 13774556Smckusick sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| 13874556Smckusick sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || 13974556Smckusick sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { 14074556Smckusick pfatal("kernel lacks background fsck support\n"); 14174556Smckusick exit(EEXIT); 14274556Smckusick } 143143235Sdelphij /* 144143235Sdelphij * When kernel is lack of runtime bgfsck superblock summary 145143235Sdelphij * adjustment functionality, it does not mean we can not 146143235Sdelphij * continue, as old kernels will recompute the summary at 147143235Sdelphij * mount time. However, it will be an unexpected softupdates 148143235Sdelphij * inconsistency if it turns out that the summary is still 149143235Sdelphij * incorrect. Set a flag so subsequent operation can know 150143235Sdelphij * this. 151143235Sdelphij */ 152143235Sdelphij bkgrdsumadj = 1; 153143235Sdelphij if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 || 154143235Sdelphij sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 || 155143235Sdelphij sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 || 156143235Sdelphij sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 || 157143235Sdelphij sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) { 158143235Sdelphij bkgrdsumadj = 0; 159143235Sdelphij pwarn("kernel lacks runtime superblock summary adjustment support"); 160143235Sdelphij } 16174556Smckusick cmd.version = FFS_CMD_VERSION; 16274556Smckusick cmd.handle = fsreadfd; 16374556Smckusick fswritefd = -1; 16474556Smckusick } 1651558Srgrimes if (preen == 0) 1661558Srgrimes printf("** %s", dev); 16774556Smckusick if (bkgrdflag == 0 && 16874556Smckusick (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { 1691558Srgrimes fswritefd = -1; 1701558Srgrimes if (preen) 1711558Srgrimes pfatal("NO WRITE ACCESS"); 1721558Srgrimes printf(" (NO WRITE)"); 1731558Srgrimes } 1741558Srgrimes if (preen == 0) 1751558Srgrimes printf("\n"); 1761558Srgrimes /* 1771558Srgrimes * Read in the superblock, looking for alternates if necessary 1781558Srgrimes */ 1791558Srgrimes if (readsb(1) == 0) { 18023675Speter skipclean = 0; 1811558Srgrimes if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) 1821558Srgrimes return(0); 1831558Srgrimes if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) 1841558Srgrimes return (0); 1851558Srgrimes for (cg = 0; cg < proto.fs_ncg; cg++) { 1861558Srgrimes bflag = fsbtodb(&proto, cgsblock(&proto, cg)); 1871558Srgrimes if (readsb(0) != 0) 1881558Srgrimes break; 1891558Srgrimes } 1901558Srgrimes if (cg >= proto.fs_ncg) { 1911558Srgrimes printf("%s %s\n%s %s\n%s %s\n", 1921558Srgrimes "SEARCH FOR ALTERNATE SUPER-BLOCK", 1931558Srgrimes "FAILED. YOU MUST USE THE", 1941558Srgrimes "-b OPTION TO FSCK TO SPECIFY THE", 1951558Srgrimes "LOCATION OF AN ALTERNATE", 1961558Srgrimes "SUPER-BLOCK TO SUPPLY NEEDED", 1971558Srgrimes "INFORMATION; SEE fsck(8)."); 1986280Sbde bflag = 0; 1991558Srgrimes return(0); 2001558Srgrimes } 2011558Srgrimes pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); 2026280Sbde bflag = 0; 2031558Srgrimes } 20475557Smckusick if (skipclean && preen && sblock.fs_clean) { 205118302Sru pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); 20641474Sjulian return (-1); 20741474Sjulian } 2081558Srgrimes maxfsblock = sblock.fs_size; 2091558Srgrimes maxino = sblock.fs_ncg * sblock.fs_ipg; 2101558Srgrimes /* 2111558Srgrimes * Check and potentially fix certain fields in the super block. 2121558Srgrimes */ 2131558Srgrimes if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { 2141558Srgrimes pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); 2151558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2161558Srgrimes sblock.fs_optim = FS_OPTTIME; 2171558Srgrimes sbdirty(); 2181558Srgrimes } 2191558Srgrimes } 2201558Srgrimes if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { 2211558Srgrimes pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", 2221558Srgrimes sblock.fs_minfree); 2231558Srgrimes if (reply("SET TO DEFAULT") == 1) { 2241558Srgrimes sblock.fs_minfree = 10; 2251558Srgrimes sbdirty(); 2261558Srgrimes } 2271558Srgrimes } 22898542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 22998542Smckusick sblock.fs_old_inodefmt < FS_44INODEFMT) { 230102231Strhodes pwarn("Format of file system is too old.\n"); 23196483Sphk pwarn("Must update to modern format using a version of fsck\n"); 23296483Sphk pfatal("from before 2002 with the command ``fsck -c 2''\n"); 23396483Sphk exit(EEXIT); 2341558Srgrimes } 23523675Speter if (asblk.b_dirty && !bflag) { 23623675Speter memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); 2371558Srgrimes flush(fswritefd, &asblk); 2381558Srgrimes } 2391558Srgrimes /* 2401558Srgrimes * read in the summary info. 2411558Srgrimes */ 2421558Srgrimes asked = 0; 24371073Siedowse sblock.fs_csp = calloc(1, sblock.fs_cssize); 244125036Scperciva if (sblock.fs_csp == NULL) { 245125036Scperciva printf("cannot alloc %u bytes for cg summary info\n", 246125036Scperciva (unsigned)sblock.fs_cssize); 247125036Scperciva goto badsb; 248125036Scperciva } 2491558Srgrimes for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { 2501558Srgrimes size = sblock.fs_cssize - i < sblock.fs_bsize ? 2511558Srgrimes sblock.fs_cssize - i : sblock.fs_bsize; 252163845Spjd if (blread(fsreadfd, (char *)sblock.fs_csp + i, 2531558Srgrimes fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), 2541558Srgrimes size) != 0 && !asked) { 2551558Srgrimes pfatal("BAD SUMMARY INFORMATION"); 25634266Sjulian if (reply("CONTINUE") == 0) { 25734266Sjulian ckfini(0); 25823675Speter exit(EEXIT); 25934266Sjulian } 2601558Srgrimes asked++; 2611558Srgrimes } 2621558Srgrimes } 2631558Srgrimes /* 2641558Srgrimes * allocate and initialize the necessary maps 2651558Srgrimes */ 266103949Smike bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); 2671558Srgrimes blockmap = calloc((unsigned)bmapsize, sizeof (char)); 2681558Srgrimes if (blockmap == NULL) { 2691558Srgrimes printf("cannot alloc %u bytes for blockmap\n", 2701558Srgrimes (unsigned)bmapsize); 2711558Srgrimes goto badsb; 2721558Srgrimes } 27341474Sjulian inostathead = calloc((unsigned)(sblock.fs_ncg), 27441474Sjulian sizeof(struct inostatlist)); 27541474Sjulian if (inostathead == NULL) { 27641474Sjulian printf("cannot alloc %u bytes for inostathead\n", 27741474Sjulian (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); 2781558Srgrimes goto badsb; 2791558Srgrimes } 280107518Smckusick numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128); 28157573Smckusick dirhash = numdirs; 2821558Srgrimes inplast = 0; 2831558Srgrimes listmax = numdirs + 10; 2841558Srgrimes inpsort = (struct inoinfo **)calloc((unsigned)listmax, 2851558Srgrimes sizeof(struct inoinfo *)); 2861558Srgrimes inphead = (struct inoinfo **)calloc((unsigned)numdirs, 2871558Srgrimes sizeof(struct inoinfo *)); 2881558Srgrimes if (inpsort == NULL || inphead == NULL) { 289101037Smux printf("cannot alloc %ju bytes for inphead\n", 290101037Smux (uintmax_t)numdirs * sizeof(struct inoinfo *)); 2911558Srgrimes goto badsb; 2921558Srgrimes } 2931558Srgrimes bufinit(); 29434266Sjulian if (sblock.fs_flags & FS_DOSOFTDEP) 29534266Sjulian usedsoftdep = 1; 29634266Sjulian else 29734266Sjulian usedsoftdep = 0; 2981558Srgrimes return (1); 2991558Srgrimes 3001558Srgrimesbadsb: 30123675Speter ckfini(0); 3021558Srgrimes return (0); 3031558Srgrimes} 3041558Srgrimes 3051558Srgrimes/* 30698542Smckusick * Possible superblock locations ordered from most to least likely. 30798542Smckusick */ 30898542Smckusickstatic int sblock_try[] = SBLOCKSEARCH; 30998542Smckusick 310122784Swes#define BAD_MAGIC_MSG \ 311122784Swes"The previous newfs operation on this volume did not complete.\n" \ 312122784Swes"You must complete newfs before mounting this volume.\n" 313122784Swes 31498542Smckusick/* 3151558Srgrimes * Read in the super block and its summary info. 3161558Srgrimes */ 31775557Smckusickint 31892839Simpreadsb(int listerr) 3191558Srgrimes{ 32098542Smckusick ufs2_daddr_t super; 32198542Smckusick int i; 3221558Srgrimes 32398542Smckusick if (bflag) { 32498542Smckusick super = bflag; 325163845Spjd if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) 32698542Smckusick return (0); 327134011Sjhb if (sblock.fs_magic == FS_BAD_MAGIC) { 328122784Swes fprintf(stderr, BAD_MAGIC_MSG); 329122784Swes exit(11); 330122784Swes } 331107518Smckusick if (sblock.fs_magic != FS_UFS1_MAGIC && 332107518Smckusick sblock.fs_magic != FS_UFS2_MAGIC) { 333107518Smckusick fprintf(stderr, "%d is not a file system superblock\n", 334107518Smckusick bflag); 335107518Smckusick return (0); 336107518Smckusick } 33798542Smckusick } else { 33898542Smckusick for (i = 0; sblock_try[i] != -1; i++) { 33998542Smckusick super = sblock_try[i] / dev_bsize; 340163845Spjd if ((blread(fsreadfd, (char *)&sblock, super, 34198542Smckusick (long)SBLOCKSIZE))) 34298542Smckusick return (0); 343134011Sjhb if (sblock.fs_magic == FS_BAD_MAGIC) { 344122784Swes fprintf(stderr, BAD_MAGIC_MSG); 345122784Swes exit(11); 346122784Swes } 34798542Smckusick if ((sblock.fs_magic == FS_UFS1_MAGIC || 34898542Smckusick (sblock.fs_magic == FS_UFS2_MAGIC && 349107294Smckusick sblock.fs_sblockloc == sblock_try[i])) && 35098542Smckusick sblock.fs_ncg >= 1 && 351104745Smckusick sblock.fs_bsize >= MINBSIZE && 352176573Sdelphij sblock.fs_sbsize >= roundup(sizeof(struct fs), dev_bsize)) 35398542Smckusick break; 35498542Smckusick } 35598542Smckusick if (sblock_try[i] == -1) { 356102231Strhodes fprintf(stderr, "Cannot find file system superblock\n"); 35798542Smckusick return (0); 35898542Smckusick } 35998542Smckusick } 3601558Srgrimes /* 361102231Strhodes * Compute block size that the file system is based on, 3621558Srgrimes * according to fsbtodb, and adjust superblock block number 3631558Srgrimes * so we can tell if this is an alternate later. 3641558Srgrimes */ 3651558Srgrimes super *= dev_bsize; 3661558Srgrimes dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); 3671558Srgrimes sblk.b_bno = super / dev_bsize; 36898542Smckusick sblk.b_size = SBLOCKSIZE; 369107518Smckusick if (bflag) 370107518Smckusick goto out; 3711558Srgrimes /* 37294031Smckusick * Compare all fields that should not differ in alternate super block. 3731558Srgrimes * When an alternate super-block is specified this check is skipped. 3741558Srgrimes */ 3751558Srgrimes getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); 3761558Srgrimes if (asblk.b_errs) 3771558Srgrimes return (0); 37894031Smckusick if (altsblock.fs_sblkno != sblock.fs_sblkno || 37994031Smckusick altsblock.fs_cblkno != sblock.fs_cblkno || 38094031Smckusick altsblock.fs_iblkno != sblock.fs_iblkno || 38194031Smckusick altsblock.fs_dblkno != sblock.fs_dblkno || 38294031Smckusick altsblock.fs_ncg != sblock.fs_ncg || 38394031Smckusick altsblock.fs_bsize != sblock.fs_bsize || 38494031Smckusick altsblock.fs_fsize != sblock.fs_fsize || 38594031Smckusick altsblock.fs_frag != sblock.fs_frag || 38694031Smckusick altsblock.fs_bmask != sblock.fs_bmask || 38794031Smckusick altsblock.fs_fmask != sblock.fs_fmask || 38894031Smckusick altsblock.fs_bshift != sblock.fs_bshift || 38994031Smckusick altsblock.fs_fshift != sblock.fs_fshift || 39094031Smckusick altsblock.fs_fragshift != sblock.fs_fragshift || 39194031Smckusick altsblock.fs_fsbtodb != sblock.fs_fsbtodb || 39294031Smckusick altsblock.fs_sbsize != sblock.fs_sbsize || 39394031Smckusick altsblock.fs_nindir != sblock.fs_nindir || 39494031Smckusick altsblock.fs_inopb != sblock.fs_inopb || 39594031Smckusick altsblock.fs_cssize != sblock.fs_cssize || 39694031Smckusick altsblock.fs_ipg != sblock.fs_ipg || 39794031Smckusick altsblock.fs_fpg != sblock.fs_fpg || 39894031Smckusick altsblock.fs_magic != sblock.fs_magic) { 3991558Srgrimes badsb(listerr, 4001558Srgrimes "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); 4011558Srgrimes return (0); 4021558Srgrimes } 403107518Smckusickout: 40498542Smckusick /* 40598542Smckusick * If not yet done, update UFS1 superblock with new wider fields. 40698542Smckusick */ 40798542Smckusick if (sblock.fs_magic == FS_UFS1_MAGIC && 40898542Smckusick sblock.fs_maxbsize != sblock.fs_bsize) { 40998542Smckusick sblock.fs_maxbsize = sblock.fs_bsize; 41098542Smckusick sblock.fs_time = sblock.fs_old_time; 41198542Smckusick sblock.fs_size = sblock.fs_old_size; 41298542Smckusick sblock.fs_dsize = sblock.fs_old_dsize; 41398542Smckusick sblock.fs_csaddr = sblock.fs_old_csaddr; 41498542Smckusick sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; 41598542Smckusick sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; 41698542Smckusick sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; 41798542Smckusick sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; 41898542Smckusick } 4191558Srgrimes havesb = 1; 4201558Srgrimes return (1); 4211558Srgrimes} 4221558Srgrimes 4237585Sbdestatic void 424100935Sphkbadsb(int listerr, const char *s) 4251558Srgrimes{ 4261558Srgrimes 4271558Srgrimes if (!listerr) 4281558Srgrimes return; 4291558Srgrimes if (preen) 4301558Srgrimes printf("%s: ", cdevname); 4311558Srgrimes pfatal("BAD SUPER BLOCK: %s\n", s); 4321558Srgrimes} 4331558Srgrimes 43475884Siedowsevoid 43592839Simpsblock_init(void) 43675557Smckusick{ 43775557Smckusick struct disklabel *lp; 43875557Smckusick 43975557Smckusick fswritefd = -1; 44075557Smckusick fsmodified = 0; 44175557Smckusick lfdir = 0; 44275557Smckusick initbarea(&sblk); 44375557Smckusick initbarea(&asblk); 44498542Smckusick sblk.b_un.b_buf = malloc(SBLOCKSIZE); 44598542Smckusick asblk.b_un.b_buf = malloc(SBLOCKSIZE); 44675557Smckusick if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) 44775557Smckusick errx(EEXIT, "cannot allocate space for superblock"); 44875557Smckusick if ((lp = getdisklabel(NULL, fsreadfd))) 44975557Smckusick dev_bsize = secsize = lp->d_secsize; 45075557Smckusick else 45175557Smckusick dev_bsize = secsize = DEV_BSIZE; 45275557Smckusick} 45375557Smckusick 4541558Srgrimes/* 4551558Srgrimes * Calculate a prototype superblock based on information in the disk label. 4561558Srgrimes * When done the cgsblock macro can be calculated and the fs_ncg field 4571558Srgrimes * can be used. Do NOT attempt to use other macros without verifying that 4581558Srgrimes * their needed information is available! 4591558Srgrimes */ 46023675Speterstatic int 46192839Simpcalcsb(char *dev, int devfd, struct fs *fs) 4621558Srgrimes{ 46392806Sobrien struct disklabel *lp; 46492806Sobrien struct partition *pp; 46592806Sobrien char *cp; 46698542Smckusick int i, nspf; 4671558Srgrimes 46823675Speter cp = strchr(dev, '\0') - 1; 4697585Sbde if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) { 4701558Srgrimes pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); 4711558Srgrimes return (0); 4721558Srgrimes } 4731558Srgrimes lp = getdisklabel(dev, devfd); 4741558Srgrimes if (isdigit(*cp)) 4751558Srgrimes pp = &lp->d_partitions[0]; 4761558Srgrimes else 4771558Srgrimes pp = &lp->d_partitions[*cp - 'a']; 4781558Srgrimes if (pp->p_fstype != FS_BSDFFS) { 4791558Srgrimes pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", 4801558Srgrimes dev, pp->p_fstype < FSMAXTYPES ? 4811558Srgrimes fstypenames[pp->p_fstype] : "unknown"); 4821558Srgrimes return (0); 4831558Srgrimes } 48441474Sjulian if (pp->p_fsize == 0 || pp->p_frag == 0 || 48541474Sjulian pp->p_cpg == 0 || pp->p_size == 0) { 48641474Sjulian pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", 48741474Sjulian dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], 48841474Sjulian pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); 48932622Sbde return (0); 49032622Sbde } 49123675Speter memset(fs, 0, sizeof(struct fs)); 4921558Srgrimes fs->fs_fsize = pp->p_fsize; 4931558Srgrimes fs->fs_frag = pp->p_frag; 4941558Srgrimes fs->fs_size = pp->p_size; 49598542Smckusick fs->fs_sblkno = roundup( 49698542Smckusick howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), 49798542Smckusick fs->fs_frag); 49898542Smckusick nspf = fs->fs_fsize / lp->d_secsize; 49998542Smckusick for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) 5001558Srgrimes fs->fs_fsbtodb++; 5011558Srgrimes dev_bsize = lp->d_secsize; 50298542Smckusick if (fs->fs_magic == FS_UFS2_MAGIC) { 50398542Smckusick fs->fs_fpg = pp->p_cpg; 50498542Smckusick fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); 50598542Smckusick } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { 50698542Smckusick fs->fs_old_cpg = pp->p_cpg; 50798542Smckusick fs->fs_old_cgmask = 0xffffffff; 50898542Smckusick for (i = lp->d_ntracks; i > 1; i >>= 1) 50998542Smckusick fs->fs_old_cgmask <<= 1; 51098542Smckusick if (!POWEROF2(lp->d_ntracks)) 51198542Smckusick fs->fs_old_cgmask <<= 1; 51298542Smckusick fs->fs_old_cgoffset = roundup(howmany(lp->d_nsectors, nspf), 51398542Smckusick fs->fs_frag); 51498542Smckusick fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf; 51598542Smckusick fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl, 51698542Smckusick fs->fs_old_cpg); 51798542Smckusick } 5181558Srgrimes return (1); 5191558Srgrimes} 5201558Srgrimes 52123675Speterstatic struct disklabel * 52292839Simpgetdisklabel(char *s, int fd) 5231558Srgrimes{ 5241558Srgrimes static struct disklabel lab; 5251558Srgrimes 5261558Srgrimes if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 5271558Srgrimes if (s == NULL) 5281558Srgrimes return ((struct disklabel *)NULL); 5291558Srgrimes pwarn("ioctl (GCINFO): %s\n", strerror(errno)); 53023675Speter errx(EEXIT, "%s: can't read disk label", s); 5311558Srgrimes } 5321558Srgrimes return (&lab); 5331558Srgrimes} 534