/* * 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. * 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. */ #if 0 #ifndef lint static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95"; #endif /* not lint */ #endif #include __FBSDID("$FreeBSD$"); #include #include #define FSTYPENAMES #include #include #include #include #include #include #include #include #include #include #include #include "fsck.h" struct bufarea asblk; #define altsblock (*asblk.b_un.b_fs) #define POWEROF2(num) (((num) & ((num) - 1)) == 0) static void badsb(int listerr, const char *s); static int calcsb(char *dev, int devfd, struct fs *fs); static struct disklabel *getdisklabel(char *s, int fd); /* * Read in a superblock finding an alternate if necessary. * Return 1 if successful, 0 if unsuccessful, -1 if file system * is already clean (ckclean and preen mode only). */ int setup(char *dev) { long cg, asked, i, j; long bmapsize; struct stat statb; struct fs proto; size_t size; havesb = 0; fswritefd = -1; cursnapshot = 0; if (stat(dev, &statb) < 0) { printf("Can't stat %s: %s\n", dev, strerror(errno)); if (bkgrdflag) { unlink(snapname); bkgrdflag = 0; } return (0); } if ((statb.st_mode & S_IFMT) != S_IFCHR && (statb.st_mode & S_IFMT) != S_IFBLK) { if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) { unlink(snapname); printf("background fsck lacks a snapshot\n"); exit(EEXIT); } if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) { cursnapshot = statb.st_ino; } else { if (cvtlevel == 0 || (statb.st_flags & SF_SNAPSHOT) == 0) { if (preen && bkgrdflag) { unlink(snapname); bkgrdflag = 0; } pfatal("%s is not a disk device", dev); if (reply("CONTINUE") == 0) { if (bkgrdflag) { unlink(snapname); bkgrdflag = 0; } return (0); } } else { if (bkgrdflag) { unlink(snapname); bkgrdflag = 0; } pfatal("cannot convert a snapshot"); exit(EEXIT); } } } if ((fsreadfd = open(dev, O_RDONLY)) < 0) { if (bkgrdflag) { unlink(snapname); bkgrdflag = 0; } printf("Can't open %s: %s\n", dev, strerror(errno)); return (0); } if (bkgrdflag) { unlink(snapname); size = MIBSIZE; if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0|| sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0|| sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0|| sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 || sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) { pfatal("kernel lacks background fsck support\n"); exit(EEXIT); } /* * When kernel is lack of runtime bgfsck superblock summary * adjustment functionality, it does not mean we can not * continue, as old kernels will recompute the summary at * mount time. However, it will be an unexpected softupdates * inconsistency if it turns out that the summary is still * incorrect. Set a flag so subsequent operation can know * this. */ bkgrdsumadj = 1; if (sysctlnametomib("vfs.ffs.adjndir", adjndir, &size) < 0 || sysctlnametomib("vfs.ffs.adjnbfree", adjnbfree, &size) < 0 || sysctlnametomib("vfs.ffs.adjnifree", adjnifree, &size) < 0 || sysctlnametomib("vfs.ffs.adjnffree", adjnffree, &size) < 0 || sysctlnametomib("vfs.ffs.adjnumclusters", adjnumclusters, &size) < 0) { bkgrdsumadj = 0; pwarn("kernel lacks runtime superblock summary adjustment support"); } cmd.version = FFS_CMD_VERSION; cmd.handle = fsreadfd; fswritefd = -1; } if (preen == 0) printf("** %s", dev); if (bkgrdflag == 0 && (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) { fswritefd = -1; if (preen) pfatal("NO WRITE ACCESS"); printf(" (NO WRITE)"); } if (preen == 0) printf("\n"); /* * Read in the superblock, looking for alternates if necessary */ if (readsb(1) == 0) { skipclean = 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 TO SPECIFY THE", "LOCATION OF AN ALTERNATE", "SUPER-BLOCK TO SUPPLY NEEDED", "INFORMATION; SEE fsck_ffs(8)."); bflag = 0; return(0); } pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); bflag = 0; } if (skipclean && ckclean && sblock.fs_clean) { pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n"); return (-1); } maxfsblock = sblock.fs_size; maxino = sblock.fs_ncg * sblock.fs_ipg; /* * 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_magic == FS_UFS1_MAGIC && sblock.fs_old_inodefmt < FS_44INODEFMT) { pwarn("Format of file system is too old.\n"); pwarn("Must update to modern format using a version of fsck\n"); pfatal("from before 2002 with the command ``fsck -c 2''\n"); exit(EEXIT); } if (asblk.b_dirty && !bflag) { memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize); flush(fswritefd, &asblk); } /* * read in the summary info. */ asked = 0; sblock.fs_csp = Calloc(1, sblock.fs_cssize); if (sblock.fs_csp == NULL) { printf("cannot alloc %u bytes for cg summary info\n", (unsigned)sblock.fs_cssize); goto badsb; } 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; readcnt[sblk.b_type]++; if (blread(fsreadfd, (char *)sblock.fs_csp + i, fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), size) != 0 && !asked) { pfatal("BAD SUMMARY INFORMATION"); if (reply("CONTINUE") == 0) { ckfini(0); exit(EEXIT); } asked++; } } /* * allocate and initialize the necessary maps */ bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short)); blockmap = Calloc((unsigned)bmapsize, sizeof (char)); if (blockmap == NULL) { printf("cannot alloc %u bytes for blockmap\n", (unsigned)bmapsize); goto badsb; } inostathead = Calloc((unsigned)(sblock.fs_ncg), sizeof(struct inostatlist)); if (inostathead == NULL) { printf("cannot alloc %u bytes for inostathead\n", (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg))); goto badsb; } numdirs = MAX(sblock.fs_cstotal.cs_ndir, 128); dirhash = numdirs; 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 %ju bytes for inphead\n", (uintmax_t)numdirs * sizeof(struct inoinfo *)); goto badsb; } bufinit(); if (sblock.fs_flags & FS_DOSOFTDEP) usedsoftdep = 1; else usedsoftdep = 0; return (1); badsb: ckfini(0); return (0); } /* * Possible superblock locations ordered from most to least likely. */ static int sblock_try[] = SBLOCKSEARCH; #define BAD_MAGIC_MSG \ "The previous newfs operation on this volume did not complete.\n" \ "You must complete newfs before mounting this volume.\n" /* * Read in the super block and its summary info. */ int readsb(int listerr) { ufs2_daddr_t super; int i; if (bflag) { super = bflag; readcnt[sblk.b_type]++; if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) return (0); if (sblock.fs_magic == FS_BAD_MAGIC) { fprintf(stderr, BAD_MAGIC_MSG); exit(11); } if (sblock.fs_magic != FS_UFS1_MAGIC && sblock.fs_magic != FS_UFS2_MAGIC) { fprintf(stderr, "%d is not a file system superblock\n", bflag); return (0); } } else { for (i = 0; sblock_try[i] != -1; i++) { super = sblock_try[i] / dev_bsize; readcnt[sblk.b_type]++; if ((blread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE))) return (0); if (sblock.fs_magic == FS_BAD_MAGIC) { fprintf(stderr, BAD_MAGIC_MSG); exit(11); } if ((sblock.fs_magic == FS_UFS1_MAGIC || (sblock.fs_magic == FS_UFS2_MAGIC && sblock.fs_sblockloc == sblock_try[i])) && sblock.fs_ncg >= 1 && sblock.fs_bsize >= MINBSIZE && sblock.fs_sbsize >= roundup(sizeof(struct fs), dev_bsize)) break; } if (sblock_try[i] == -1) { fprintf(stderr, "Cannot find file system superblock\n"); return (0); } } /* * Compute block size that the file system 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; sblk.b_size = SBLOCKSIZE; if (bflag) goto out; /* * Compare all fields that should not differ in 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); if (altsblock.fs_sblkno != sblock.fs_sblkno || altsblock.fs_cblkno != sblock.fs_cblkno || altsblock.fs_iblkno != sblock.fs_iblkno || altsblock.fs_dblkno != sblock.fs_dblkno || altsblock.fs_ncg != sblock.fs_ncg || altsblock.fs_bsize != sblock.fs_bsize || altsblock.fs_fsize != sblock.fs_fsize || altsblock.fs_frag != sblock.fs_frag || altsblock.fs_bmask != sblock.fs_bmask || altsblock.fs_fmask != sblock.fs_fmask || altsblock.fs_bshift != sblock.fs_bshift || altsblock.fs_fshift != sblock.fs_fshift || altsblock.fs_fragshift != sblock.fs_fragshift || altsblock.fs_fsbtodb != sblock.fs_fsbtodb || altsblock.fs_sbsize != sblock.fs_sbsize || altsblock.fs_nindir != sblock.fs_nindir || altsblock.fs_inopb != sblock.fs_inopb || altsblock.fs_cssize != sblock.fs_cssize || altsblock.fs_ipg != sblock.fs_ipg || altsblock.fs_fpg != sblock.fs_fpg || altsblock.fs_magic != sblock.fs_magic) { badsb(listerr, "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); return (0); } out: /* * If not yet done, update UFS1 superblock with new wider fields. */ if (sblock.fs_magic == FS_UFS1_MAGIC && sblock.fs_maxbsize != sblock.fs_bsize) { sblock.fs_maxbsize = sblock.fs_bsize; sblock.fs_time = sblock.fs_old_time; sblock.fs_size = sblock.fs_old_size; sblock.fs_dsize = sblock.fs_old_dsize; sblock.fs_csaddr = sblock.fs_old_csaddr; sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir; sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree; sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree; sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree; } havesb = 1; return (1); } static void badsb(int listerr, const char *s) { if (!listerr) return; if (preen) printf("%s: ", cdevname); pfatal("BAD SUPER BLOCK: %s\n", s); } void sblock_init(void) { struct disklabel *lp; fswritefd = -1; fsmodified = 0; lfdir = 0; initbarea(&sblk, BT_SUPERBLK); initbarea(&asblk, BT_SUPERBLK); sblk.b_un.b_buf = Malloc(SBLOCKSIZE); asblk.b_un.b_buf = Malloc(SBLOCKSIZE); if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) errx(EEXIT, "cannot allocate space for superblock"); if ((lp = getdisklabel(NULL, fsreadfd))) real_dev_bsize = dev_bsize = secsize = lp->d_secsize; else dev_bsize = secsize = DEV_BSIZE; } /* * 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(char *dev, int devfd, struct fs *fs) { struct disklabel *lp; struct partition *pp; char *cp; int i, nspf; 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); } if (pp->p_fsize == 0 || pp->p_frag == 0 || pp->p_cpg == 0 || pp->p_size == 0) { pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n", dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype], pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size); return (0); } memset(fs, 0, sizeof(struct fs)); fs->fs_fsize = pp->p_fsize; fs->fs_frag = pp->p_frag; fs->fs_size = pp->p_size; fs->fs_sblkno = roundup( howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), fs->fs_frag); nspf = fs->fs_fsize / lp->d_secsize; for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1) fs->fs_fsbtodb++; dev_bsize = lp->d_secsize; if (fs->fs_magic == FS_UFS2_MAGIC) { fs->fs_fpg = pp->p_cpg; fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ { fs->fs_old_cpg = pp->p_cpg; fs->fs_old_cgmask = 0xffffffff; for (i = lp->d_ntracks; i > 1; i >>= 1) fs->fs_old_cgmask <<= 1; if (!POWEROF2(lp->d_ntracks)) fs->fs_old_cgmask <<= 1; fs->fs_old_cgoffset = roundup(howmany(lp->d_nsectors, nspf), fs->fs_frag); fs->fs_fpg = (fs->fs_old_cpg * lp->d_secpercyl) / nspf; fs->fs_ncg = howmany(fs->fs_size / lp->d_secpercyl, fs->fs_old_cpg); } return (1); } static struct disklabel * getdisklabel(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); }