/* $NetBSD: setup.c,v 1.45 2001/08/17 02:18:47 lukem Exp $ */ /* * Copyright (c) 1980, 1986, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #ifndef lint #if 0 static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; #else __RCSID("$NetBSD: setup.c,v 1.45 2001/08/17 02:18:47 lukem Exp $"); #endif #endif /* not lint */ #include #include #include #include #define FSTYPENAMES #include #include #include #include #include #include #include #include #include #include #include #include #include "fsck.h" #include "extern.h" #include "fsutil.h" #define POWEROF2(num) (((num) & ((num) - 1)) == 0) static void badsb __P((int, char *)); static int calcsb __P((const char *, int, struct fs *)); static struct disklabel *getdisklabel __P((const char *, int)); static int readsb __P((int)); /* * Read in a superblock finding an alternate if necessary. * Return 1 if successful, 0 if unsuccessful, -1 if filesystem * is already clean (preen mode only). */ int setup(dev) const char *dev; { long cg, size, asked, i, j; long bmapsize; struct disklabel *lp; off_t sizepb; struct stat statb; struct fs proto; int doskipclean; u_int64_t maxfilesize; havesb = 0; fswritefd = -1; doskipclean = skipclean; if (stat(dev, &statb) < 0) { printf("Can't stat %s: %s\n", dev, strerror(errno)); return (0); } if (forceimage) { if (!S_ISREG(statb.st_mode)) { pfatal("%s is not a regular file", dev); if (reply("CONTINUE") == 0) return (0); } } else if (!S_ISCHR(statb.st_mode)) { pfatal("%s is not a character device", dev); if (reply("CONTINUE") == 0) return (0); } if ((fsreadfd = open(dev, O_RDONLY)) < 0) { printf("Can't open %s: %s\n", dev, strerror(errno)); return (0); } if (preen == 0) printf("** %s", dev); if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) { fswritefd = -1; if (preen) pfatal("NO WRITE ACCESS"); printf(" (NO WRITE)"); } if (preen == 0) printf("\n"); fsmodified = 0; lfdir = 0; initbarea(&sblk); initbarea(&asblk); sblk.b_un.b_buf = malloc(SBSIZE); sblock = malloc(SBSIZE); asblk.b_un.b_buf = malloc(SBSIZE); altsblock = malloc(SBSIZE); if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL || sblock == NULL || altsblock == NULL) errx(EEXIT, "cannot allocate space for superblock"); if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) dev_bsize = secsize = lp->d_secsize; else dev_bsize = secsize = DEV_BSIZE; /* * Read in the superblock, looking for alternates if necessary */ if (readsb(1) == 0) { if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0) return(0); if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) return (0); for (cg = 0; cg < proto.fs_ncg; cg++) { bflag = fsbtodb(&proto, cgsblock(&proto, cg)); if (readsb(0) != 0) break; } if (cg >= proto.fs_ncg) { printf("%s %s\n%s %s\n%s %s\n", "SEARCH FOR ALTERNATE SUPER-BLOCK", "FAILED. YOU MUST USE THE", "-b OPTION TO fsck_ffs TO SPECIFY THE", "LOCATION OF AN ALTERNATE", "SUPER-BLOCK TO SUPPLY NEEDED", "INFORMATION; SEE fsck_ffs(8)."); return(0); } doskipclean = 0; pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); } if (debug) printf("clean = %d\n", sblock->fs_clean); if (doswap) doskipclean = 0; if (sblock->fs_clean & FS_ISCLEAN) { if (doskipclean) { pwarn("%sile system is clean; not checking\n", preen ? "f" : "** F"); return (-1); } if (!preen && !doswap) pwarn("** File system is already clean\n"); } maxfsblock = sblock->fs_size; maxino = sblock->fs_ncg * sblock->fs_ipg; sizepb = sblock->fs_bsize; maxfilesize = sblock->fs_bsize * NDADDR - 1; for (i = 0; i < NIADDR; i++) { sizepb *= NINDIR(sblock); maxfilesize += sizepb; } /* * Check and potentially fix certain fields in the super block. */ if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) { pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); if (reply("SET TO DEFAULT") == 1) { sblock->fs_optim = FS_OPTTIME; sbdirty(); } } if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) { pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", sblock->fs_minfree); if (reply("SET TO DEFAULT") == 1) { sblock->fs_minfree = 10; sbdirty(); } } if (sblock->fs_interleave < 1 || sblock->fs_interleave > sblock->fs_nsect) { pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK", sblock->fs_interleave); sblock->fs_interleave = 1; if (preen) printf(" (FIXED)\n"); if (preen || reply("SET TO DEFAULT") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_npsect < sblock->fs_nsect || sblock->fs_npsect > sblock->fs_nsect*2) { pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", sblock->fs_npsect); sblock->fs_npsect = sblock->fs_nsect; if (preen) printf(" (FIXED)\n"); if (preen || reply("SET TO DEFAULT") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) { pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK", sblock->fs_bmask); sblock->fs_bmask = ~(sblock->fs_bsize - 1); if (preen) printf(" (FIXED)\n"); if (preen || reply("FIX") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) { pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK", sblock->fs_fmask); sblock->fs_fmask = ~(sblock->fs_fsize - 1); if (preen) printf(" (FIXED)\n"); if (preen || reply("FIX") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_inodefmt >= FS_44INODEFMT) { if (sblock->fs_maxfilesize != maxfilesize) { pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK", (unsigned long long)sblock->fs_maxfilesize); sblock->fs_maxfilesize = maxfilesize; if (preen) printf(" (FIXED)\n"); if (preen || reply("FIX") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_maxsymlinklen != MAXSYMLINKLEN) { pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", sblock->fs_maxsymlinklen); sblock->fs_maxsymlinklen = MAXSYMLINKLEN; if (preen) printf(" (FIXED)\n"); if (preen || reply("FIX") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_qbmask != ~sblock->fs_bmask) { pwarn("INCORRECT QBMASK=%llx IN SUPERBLOCK", (unsigned long long)sblock->fs_qbmask); sblock->fs_qbmask = ~sblock->fs_bmask; if (preen) printf(" (FIXED)\n"); if (preen || reply("FIX") == 1) { sbdirty(); dirty(&asblk); } } if (sblock->fs_qfmask != ~sblock->fs_fmask) { pwarn("INCORRECT QFMASK=%llx IN SUPERBLOCK", (unsigned long long)sblock->fs_qfmask); sblock->fs_qfmask = ~sblock->fs_fmask; if (preen) printf(" (FIXED)\n"); if (preen || reply("FIX") == 1) { sbdirty(); dirty(&asblk); } } newinofmt = 1; } else { sblock->fs_qbmask = ~sblock->fs_bmask; sblock->fs_qfmask = ~sblock->fs_fmask; newinofmt = 0; } /* * Convert to new inode format. */ if (cvtlevel >= 2 && sblock->fs_inodefmt < FS_44INODEFMT) { if (preen) pwarn("CONVERTING TO NEW INODE FORMAT\n"); else if (!reply("CONVERT TO NEW INODE FORMAT")) return(0); doinglevel2++; sblock->fs_inodefmt = FS_44INODEFMT; sblock->fs_maxfilesize = maxfilesize; sblock->fs_maxsymlinklen = MAXSYMLINKLEN; sblock->fs_qbmask = ~sblock->fs_bmask; sblock->fs_qfmask = ~sblock->fs_fmask; sbdirty(); dirty(&asblk); } /* * Convert to new cylinder group format. */ if (cvtlevel >= 1 && sblock->fs_postblformat == FS_42POSTBLFMT) { if (preen) pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n"); else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT")) return(0); doinglevel1++; sblock->fs_postblformat = FS_DYNAMICPOSTBLFMT; sblock->fs_nrpos = 8; sblock->fs_postbloff = (char *)(&sblock->fs_opostbl[0][0]) - (char *)(&sblock->fs_firstfield); sblock->fs_rotbloff = &sblock->fs_space[0] - (u_char *)(&sblock->fs_firstfield); sblock->fs_cgsize = fragroundup(sblock, CGSIZE(sblock)); sbdirty(); dirty(&asblk); } if (asblk.b_dirty && !bflag) { memmove((struct fs*)sblk.b_un.b_fs, sblock, SBSIZE); if (needswap) ffs_sb_swap(sblock, (struct fs*)sblk.b_un.b_fs); memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize); flush(fswritefd, &asblk); } /* * read in the summary info. */ asked = 0; for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) { size = sblock->fs_cssize - i < sblock->fs_bsize ? sblock->fs_cssize - i : sblock->fs_bsize; sblock->fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); if (bread(fsreadfd, (char *)sblock->fs_csp[j], fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), size) != 0 && !asked) { pfatal("BAD SUMMARY INFORMATION"); if (reply("CONTINUE") == 0) { markclean = 0; exit(EEXIT); } asked++; } /* * The following assumes that struct csum is made of * u_int32_t */ if (doswap) { int k; u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; for (k = 0; k < size / sizeof(u_int32_t); k++) cd[k] = bswap32(cd[k]); bwrite(fswritefd, (char *)sblock->fs_csp[j], fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag), size); } if (needswap) { int k; u_int32_t *cd = (u_int32_t *)sblock->fs_csp[j]; for (k = 0; k < size / sizeof(u_int32_t); k++) cd[k] = bswap32(cd[k]); } } /* * allocate and initialize the necessary maps */ bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); blockmap = calloc((unsigned)bmapsize, sizeof (char)); if (blockmap == NULL) { printf("cannot alloc %u bytes for blockmap\n", (unsigned)bmapsize); goto badsblabel; } statemap = calloc((unsigned)(maxino + 1), sizeof(char)); if (statemap == NULL) { printf("cannot alloc %u bytes for statemap\n", (unsigned)(maxino + 1)); goto badsblabel; } typemap = calloc((unsigned)(maxino + 1), sizeof(char)); if (typemap == NULL) { printf("cannot alloc %u bytes for typemap\n", (unsigned)(maxino + 1)); goto badsblabel; } lncntp = (int16_t *)calloc((unsigned)(maxino + 1), sizeof(int16_t)); if (lncntp == NULL) { printf("cannot alloc %u bytes for lncntp\n", (unsigned)((maxino + 1) * sizeof(int16_t))); goto badsblabel; } /* * cs_ndir may be inaccurate, particularly if we're using the -b * option, so set a minimum to prevent bogus subdirectory reconnects * and really inefficient directory scans. * Also set a maximum in case the value is too large. */ numdirs = sblock->fs_cstotal.cs_ndir; if (numdirs < 1024) numdirs = 1024; if (numdirs > maxino + 1) numdirs = maxino + 1; inplast = 0; listmax = numdirs + 10; inpsort = (struct inoinfo **)calloc((unsigned)listmax, sizeof(struct inoinfo *)); inphead = (struct inoinfo **)calloc((unsigned)numdirs, sizeof(struct inoinfo *)); if (inpsort == NULL || inphead == NULL) { printf("cannot alloc %u bytes for inphead\n", (unsigned)(numdirs * sizeof(struct inoinfo *))); goto badsblabel; } cgrp = malloc(sblock->fs_cgsize); if (cgrp == NULL) { printf("cannot alloc %u bytes for cylinder group\n", sblock->fs_cgsize); goto badsblabel; } bufinit(); if (sblock->fs_flags & FS_DOSOFTDEP) usedsoftdep = 1; else usedsoftdep = 0; return (1); badsblabel: markclean=0; ckfini(); return (0); } /* * Read in the super block and its summary info. */ static int readsb(listerr) int listerr; { ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize; struct fs *fs; if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super, (long)SBSIZE) != 0) return (0); sblk.b_bno = super; sblk.b_size = SBSIZE; fs = sblk.b_un.b_fs; /* auto detect byte order */ if( fs->fs_magic == FS_MAGIC) { if (endian == 0 || BYTE_ORDER == endian) { needswap = 0; doswap = do_blkswap = do_dirswap = 0; } else { needswap = 1; doswap = do_blkswap = do_dirswap = 1; } } else if (fs->fs_magic == bswap32(FS_MAGIC)) { if (endian == 0 || BYTE_ORDER != endian) { needswap = 1; doswap = do_blkswap = do_dirswap = 0; } else { needswap = 0; doswap = do_blkswap = do_dirswap = 1; } } else { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } if (doswap) { if (preen) errx(EEXIT, "incompatible options -B and -p"); if (nflag) errx(EEXIT, "incompatible options -B and -n"); if (endian == LITTLE_ENDIAN) { if (!reply("CONVERT TO LITTLE ENDIAN")) return 0; } else if (endian == BIG_ENDIAN) { if (!reply("CONVERT TO BIG ENDIAN")) return 0; } else pfatal("INTERNAL ERROR: unknown endian"); } if (needswap) printf("** Swapped byte order\n"); /* swap SB byte order if asked */ if (doswap) ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs); memmove(sblock, sblk.b_un.b_fs, SBSIZE); if (needswap) ffs_sb_swap(sblk.b_un.b_fs, sblock); /* * run a few consistency checks of the super block */ if (sblock->fs_ncg < 1) { badsb(listerr, "NCG OUT OF RANGE"); return (0); } if (sblock->fs_cpg < 1) { badsb(listerr, "CPG OUT OF RANGE"); return (0); } if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl || (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl) { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } if (sblock->fs_sbsize > SBSIZE) { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } /* * Compute block size that the filesystem is based on, * according to fsbtodb, and adjust superblock block number * so we can tell if this is an alternate later. */ super *= dev_bsize; dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); sblk.b_bno = super / dev_bsize; if (bflag) { havesb = 1; return (1); } /* * Set all possible fields that could differ, then do check * of whole super block against an alternate super block. * When an alternate super-block is specified this check is skipped. */ getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize); if (asblk.b_errs) return (0); /* swap SB byte order if asked */ if (doswap) ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs); memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize); if (needswap) ffs_sb_swap(asblk.b_un.b_fs, altsblock); if (cmpsblks(sblock, altsblock)) { if (debug) { long *nlp, *olp, *endlp; printf("superblock mismatches\n"); nlp = (long *)altsblock; olp = (long *)sblock; endlp = olp + (sblock->fs_sbsize / sizeof *olp); for ( ; olp < endlp; olp++, nlp++) { if (*olp == *nlp) continue; printf("offset %ld, original %lx, alternate %lx\n", (long)(olp - (long *)sblock), *olp, *nlp); } } badsb(listerr, "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); return (0); } /* Now we know the SB is valid, we can write it back if needed */ if (doswap) { sbdirty(); dirty(&asblk); } havesb = 1; return (1); } int cmpsblks(const struct fs *sb, struct fs *asb) { asb->fs_firstfield = sb->fs_firstfield; asb->fs_fscktime = sb->fs_fscktime; asb->fs_unused_1 = sb->fs_unused_1; asb->fs_time = sb->fs_time; asb->fs_cstotal = sb->fs_cstotal; asb->fs_cgrotor = sb->fs_cgrotor; asb->fs_fmod = sb->fs_fmod; asb->fs_clean = sb->fs_clean; asb->fs_ronly = sb->fs_ronly; asb->fs_flags = sb->fs_flags; asb->fs_maxcontig = sb->fs_maxcontig; asb->fs_minfree = sb->fs_minfree; asb->fs_optim = sb->fs_optim; asb->fs_rotdelay = sb->fs_rotdelay; asb->fs_maxbpg = sb->fs_maxbpg; memmove(asb->fs_csp, sb->fs_csp, sizeof sb->fs_csp); asb->fs_maxcluster = sb->fs_maxcluster; memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt); memmove(asb->fs_sparecon, sb->fs_sparecon, sizeof sb->fs_sparecon); /* * The following should not have to be copied. */ asb->fs_fsbtodb = sb->fs_fsbtodb; asb->fs_interleave = sb->fs_interleave; asb->fs_npsect = sb->fs_npsect; asb->fs_nrpos = sb->fs_nrpos; asb->fs_state = sb->fs_state; asb->fs_qbmask = sb->fs_qbmask; asb->fs_qfmask = sb->fs_qfmask; asb->fs_state = sb->fs_state; asb->fs_maxfilesize = sb->fs_maxfilesize; return (memcmp(sb, asb, (int)sb->fs_sbsize)); } static void badsb(listerr, s) int listerr; char *s; { if (!listerr) return; if (preen) printf("%s: ", cdevname()); pfatal("BAD SUPER BLOCK: %s\n", s); } /* * Calculate a prototype superblock based on information in the disk label. * When done the cgsblock macro can be calculated and the fs_ncg field * can be used. Do NOT attempt to use other macros without verifying that * their needed information is available! */ static int calcsb(dev, devfd, fs) const char *dev; int devfd; struct fs *fs; { struct disklabel *lp; struct partition *pp; char *cp; int i; cp = strchr(dev, '\0') - 1; if ((cp == (char *)-1 || (*cp < 'a' || *cp > 'h')) && !isdigit(*cp)) { pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); return (0); } lp = getdisklabel(dev, devfd); if (isdigit(*cp)) pp = &lp->d_partitions[0]; else pp = &lp->d_partitions[*cp - 'a']; if (pp->p_fstype != FS_BSDFFS) { pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", dev, pp->p_fstype < FSMAXTYPES ? fstypenames[pp->p_fstype] : "unknown"); return (0); } /* avoid divide by 0 */ if (pp->p_fsize == 0 || pp->p_frag == 0) return (0); memset(fs, 0, sizeof(struct fs)); fs->fs_fsize = pp->p_fsize; fs->fs_frag = pp->p_frag; fs->fs_cpg = pp->p_cpg; fs->fs_size = pp->p_size; fs->fs_ntrak = lp->d_ntracks; fs->fs_nsect = lp->d_nsectors; fs->fs_spc = lp->d_secpercyl; fs->fs_nspf = fs->fs_fsize / lp->d_secsize; fs->fs_sblkno = roundup( howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), fs->fs_frag); fs->fs_cgmask = 0xffffffff; for (i = fs->fs_ntrak; i > 1; i >>= 1) fs->fs_cgmask <<= 1; if (!POWEROF2(fs->fs_ntrak)) fs->fs_cgmask <<= 1; fs->fs_cgoffset = roundup( howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) fs->fs_fsbtodb++; dev_bsize = lp->d_secsize; return (1); } static struct disklabel * getdisklabel(s, fd) const char *s; int fd; { static struct disklabel lab; if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { if (s == NULL) return ((struct disklabel *)NULL); pwarn("ioctl (GCINFO): %s\n", strerror(errno)); errx(EEXIT, "%s: can't read disk label", s); } return (&lab); }