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/* $OpenBSD: setup.c,v 1.63 2016/09/09 15:37:15 tb Exp $ */ |
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/* $NetBSD: setup.c,v 1.27 1996/09/27 22:45:19 christos Exp $ */ |
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/* |
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* Copyright (c) 1980, 1986, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/param.h> /* MAXBSIZE DEV_BSIZE roundup */ |
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#define DKTYPENAMES |
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#include <sys/time.h> |
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#include <ufs/ufs/dinode.h> |
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#include <ufs/ffs/fs.h> |
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#include <sys/stat.h> |
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#include <sys/ioctl.h> |
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#include <sys/dkio.h> |
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#include <sys/disklabel.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
48 |
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#include <string.h> |
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#include <util.h> |
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#include <limits.h> |
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#include <ctype.h> |
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#include <err.h> |
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#include "fsck.h" |
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#include "extern.h" |
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#include "fsutil.h" |
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#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b)) |
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#define altsblock (*asblk.b_un.b_fs) |
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#define POWEROF2(num) (((num) & ((num) - 1)) == 0) |
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void badsb(int, char *); |
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int calcsb(char *, int, struct fs *, struct disklabel *, uint32_t); |
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static struct disklabel *getdisklabel(char *, int); |
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static int readsb(int); |
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static int cmpsb(struct fs *, struct fs *); |
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static char rdevname[PATH_MAX]; |
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long numdirs, listmax, inplast; |
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/* |
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* Possible locations for the superblock. |
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*/ |
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static const int sbtry[] = SBLOCKSEARCH; |
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/* locations the 1st alternate sb can be at */ |
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static const int altsbtry[] = { 32, 64, 128, 144, 160, 192, 256 }; |
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int |
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setup(char *dev, int isfsdb) |
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{ |
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long cg, size, asked, i, j; |
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size_t bmapsize; |
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struct disklabel *lp; |
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off_t sizepb; |
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struct stat statb; |
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struct fs proto; |
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int doskipclean; |
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int32_t maxsymlinklen, nindir, inopb; |
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u_int64_t maxfilesize; |
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char *realdev; |
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havesb = 0; |
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fswritefd = fsreadfd = -1; |
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doskipclean = skipclean; |
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if ((fsreadfd = opendev(dev, O_RDONLY, 0, &realdev)) < 0) { |
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printf("Can't open %s: %s\n", dev, strerror(errno)); |
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return (0); |
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} |
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if (strncmp(dev, realdev, PATH_MAX) != 0) { |
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blockcheck(unrawname(realdev)); |
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strlcpy(rdevname, realdev, sizeof(rdevname)); |
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setcdevname(rdevname, dev, preen); |
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if (isfsdb || !hotroot()) |
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if (pledge("stdio rpath wpath getpw tty disklabel", |
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NULL) == -1) |
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err(1, "pledge"); |
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} |
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if (fstat(fsreadfd, &statb) < 0) { |
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printf("Can't stat %s: %s\n", realdev, strerror(errno)); |
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close(fsreadfd); |
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return (0); |
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} |
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if (!S_ISCHR(statb.st_mode)) { |
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pfatal("%s is not a character device", realdev); |
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if (reply("CONTINUE") == 0) { |
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close(fsreadfd); |
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return (0); |
120 |
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} |
121 |
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} |
122 |
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if (preen == 0) { |
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printf("** %s", realdev); |
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if (strncmp(dev, realdev, PATH_MAX) != 0) |
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printf(" (%s)", dev); |
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} |
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if (nflag || (fswritefd = opendev(dev, O_WRONLY, 0, NULL)) < 0) { |
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fswritefd = -1; |
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if (preen) |
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pfatal("NO WRITE ACCESS"); |
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printf(" (NO WRITE)"); |
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} |
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if (preen == 0) |
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printf("\n"); |
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fsmodified = 0; |
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lfdir = 0; |
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initbarea(&sblk); |
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initbarea(&asblk); |
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sblk.b_un.b_buf = malloc(SBSIZE); |
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asblk.b_un.b_buf = malloc(SBSIZE); |
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if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL) |
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errexit("cannot allocate space for superblock\n"); |
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if ((lp = getdisklabel(NULL, fsreadfd)) != NULL) |
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secsize = lp->d_secsize; |
145 |
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else |
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secsize = DEV_BSIZE; |
147 |
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148 |
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if (isfsdb) { |
149 |
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if (pledge("stdio rpath getpw tty flock cpath wpath", NULL) == -1) |
150 |
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err(1, "pledge"); |
151 |
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} else if (!hotroot()) { |
152 |
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#ifndef SMALL |
153 |
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if (pledge("stdio getpw flock rpath cpath wpath", NULL) == -1) |
154 |
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err(1, "pledge"); |
155 |
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#else |
156 |
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if (pledge("stdio flock rpath cpath wpath", NULL) == -1) |
157 |
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err(1, "pledge"); |
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#endif |
159 |
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} |
160 |
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161 |
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/* |
162 |
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* Read in the superblock, looking for alternates if necessary |
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*/ |
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if (readsb(1) == 0) { |
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if (bflag || preen || |
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calcsb(realdev, fsreadfd, &proto, lp, SBLOCK_UFS1) == 0) |
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return(0); |
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if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) |
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return (0); |
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for (i = 0; i < sizeof(altsbtry) / sizeof(altsbtry[0]); i++) { |
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bflag = altsbtry[i]; |
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/* proto partially setup by calcsb */ |
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if (readsb(0) != 0 && |
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proto.fs_fsize == sblock.fs_fsize && |
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proto.fs_bsize == sblock.fs_bsize) |
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goto found; |
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} |
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for (cg = 0; cg < proto.fs_ncg; cg++) { |
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bflag = fsbtodb(&proto, cgsblock(&proto, cg)); |
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if (readsb(0) != 0 && |
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proto.fs_fsize == sblock.fs_fsize && |
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proto.fs_bsize == sblock.fs_bsize) |
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goto found; |
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} |
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calcsb(realdev, fsreadfd, &proto, lp, SBLOCK_UFS2); |
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for (cg = 0; cg < proto.fs_ncg; cg++) { |
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bflag = fsbtodb(&proto, cgsblock(&proto, cg)); |
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if (readsb(0) != 0 && |
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proto.fs_fsize == sblock.fs_fsize && |
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proto.fs_bsize == sblock.fs_bsize) |
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goto found; |
192 |
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} |
193 |
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if (cg >= proto.fs_ncg) { |
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printf("%s %s\n%s %s\n%s %s\n", |
195 |
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"SEARCH FOR ALTERNATE SUPER-BLOCK", |
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"FAILED. YOU MUST USE THE", |
197 |
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"-b OPTION TO FSCK_FFS TO SPECIFY THE", |
198 |
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"LOCATION OF AN ALTERNATE", |
199 |
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"SUPER-BLOCK TO SUPPLY NEEDED", |
200 |
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"INFORMATION; SEE fsck_ffs(8)."); |
201 |
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return(0); |
202 |
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} |
203 |
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found: |
204 |
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doskipclean = 0; |
205 |
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pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); |
206 |
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} |
207 |
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if (debug) |
208 |
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printf("clean = %d\n", sblock.fs_clean); |
209 |
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if (sblock.fs_clean & FS_ISCLEAN) { |
210 |
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if (doskipclean) { |
211 |
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pwarn("%sile system is clean; not checking\n", |
212 |
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preen ? "f" : "** F"); |
213 |
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return (-1); |
214 |
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} |
215 |
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if (!preen) |
216 |
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pwarn("** File system is already clean\n"); |
217 |
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} |
218 |
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maxfsblock = sblock.fs_size; |
219 |
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maxino = sblock.fs_ncg * sblock.fs_ipg; |
220 |
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sizepb = sblock.fs_bsize; |
221 |
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maxfilesize = sblock.fs_bsize * NDADDR - 1; |
222 |
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for (i = 0; i < NIADDR; i++) { |
223 |
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sizepb *= NINDIR(&sblock); |
224 |
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maxfilesize += sizepb; |
225 |
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} |
226 |
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/* |
227 |
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* Check and potentially fix certain fields in the super block. |
228 |
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*/ |
229 |
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if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { |
230 |
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pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); |
231 |
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if (reply("SET TO DEFAULT") == 1) { |
232 |
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sblock.fs_optim = FS_OPTTIME; |
233 |
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sbdirty(); |
234 |
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} |
235 |
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} |
236 |
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if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { |
237 |
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pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", |
238 |
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sblock.fs_minfree); |
239 |
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if (reply("SET TO DEFAULT") == 1) { |
240 |
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sblock.fs_minfree = 10; |
241 |
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sbdirty(); |
242 |
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} |
243 |
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} |
244 |
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if (sblock.fs_npsect < sblock.fs_nsect || |
245 |
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sblock.fs_npsect > sblock.fs_nsect*2) { |
246 |
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pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK", |
247 |
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sblock.fs_npsect); |
248 |
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sblock.fs_npsect = sblock.fs_nsect; |
249 |
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if (preen) |
250 |
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printf(" (FIXED)\n"); |
251 |
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if (preen || reply("SET TO DEFAULT") == 1) { |
252 |
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sbdirty(); |
253 |
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dirty(&asblk); |
254 |
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} |
255 |
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} |
256 |
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if (sblock.fs_bmask != ~(sblock.fs_bsize - 1)) { |
257 |
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pwarn("INCORRECT BMASK=%x IN SUPERBLOCK", |
258 |
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sblock.fs_bmask); |
259 |
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sblock.fs_bmask = ~(sblock.fs_bsize - 1); |
260 |
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if (preen) |
261 |
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printf(" (FIXED)\n"); |
262 |
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if (preen || reply("FIX") == 1) { |
263 |
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sbdirty(); |
264 |
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dirty(&asblk); |
265 |
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} |
266 |
|
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} |
267 |
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if (sblock.fs_fmask != ~(sblock.fs_fsize - 1)) { |
268 |
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pwarn("INCORRECT FMASK=%x IN SUPERBLOCK", |
269 |
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sblock.fs_fmask); |
270 |
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sblock.fs_fmask = ~(sblock.fs_fsize - 1); |
271 |
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if (preen) |
272 |
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printf(" (FIXED)\n"); |
273 |
|
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if (preen || reply("FIX") == 1) { |
274 |
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sbdirty(); |
275 |
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dirty(&asblk); |
276 |
|
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} |
277 |
|
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} |
278 |
|
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if (1 << sblock.fs_bshift != sblock.fs_bsize) { |
279 |
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pwarn("INCORRECT BSHIFT=%d IN SUPERBLOCK", sblock.fs_bshift); |
280 |
|
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sblock.fs_bshift = ffs(sblock.fs_bsize) - 1; |
281 |
|
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if (preen) |
282 |
|
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printf(" (FIXED)\n"); |
283 |
|
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if (preen || reply("FIX") == 1) { |
284 |
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sbdirty(); |
285 |
|
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dirty(&asblk); |
286 |
|
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} |
287 |
|
|
} |
288 |
|
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if (1 << sblock.fs_fshift != sblock.fs_fsize) { |
289 |
|
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pwarn("INCORRECT FSHIFT=%d IN SUPERBLOCK", sblock.fs_fshift); |
290 |
|
|
sblock.fs_fshift = ffs(sblock.fs_fsize) - 1; |
291 |
|
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if (preen) |
292 |
|
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printf(" (FIXED)\n"); |
293 |
|
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if (preen || reply("FIX") == 1) { |
294 |
|
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sbdirty(); |
295 |
|
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dirty(&asblk); |
296 |
|
|
} |
297 |
|
|
} |
298 |
|
|
if (sblock.fs_inodefmt < FS_44INODEFMT) { |
299 |
|
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pwarn("Format of filesystem is too old.\n"); |
300 |
|
|
pwarn("Must update to modern format using a version of fsck\n"); |
301 |
|
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pfatal("from before release 5.0 with the command ``fsck -c 2''\n"); |
302 |
|
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exit(8); |
303 |
|
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} |
304 |
|
|
if (sblock.fs_maxfilesize != maxfilesize) { |
305 |
|
|
pwarn("INCORRECT MAXFILESIZE=%llu IN SUPERBLOCK", |
306 |
|
|
(unsigned long long)sblock.fs_maxfilesize); |
307 |
|
|
sblock.fs_maxfilesize = maxfilesize; |
308 |
|
|
if (preen) |
309 |
|
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printf(" (FIXED)\n"); |
310 |
|
|
if (preen || reply("FIX") == 1) { |
311 |
|
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sbdirty(); |
312 |
|
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dirty(&asblk); |
313 |
|
|
} |
314 |
|
|
} |
315 |
|
|
maxsymlinklen = sblock.fs_magic == FS_UFS1_MAGIC ? |
316 |
|
|
MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2; |
317 |
|
|
if (sblock.fs_maxsymlinklen != maxsymlinklen) { |
318 |
|
|
pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK", |
319 |
|
|
sblock.fs_maxsymlinklen); |
320 |
|
|
sblock.fs_maxsymlinklen = maxsymlinklen; |
321 |
|
|
if (preen) |
322 |
|
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printf(" (FIXED)\n"); |
323 |
|
|
if (preen || reply("FIX") == 1) { |
324 |
|
|
sbdirty(); |
325 |
|
|
dirty(&asblk); |
326 |
|
|
} |
327 |
|
|
} |
328 |
|
|
if (sblock.fs_qbmask != ~sblock.fs_bmask) { |
329 |
|
|
pwarn("INCORRECT QBMASK=%lx IN SUPERBLOCK", |
330 |
|
|
(unsigned long)sblock.fs_qbmask); |
331 |
|
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sblock.fs_qbmask = ~sblock.fs_bmask; |
332 |
|
|
if (preen) |
333 |
|
|
printf(" (FIXED)\n"); |
334 |
|
|
if (preen || reply("FIX") == 1) { |
335 |
|
|
sbdirty(); |
336 |
|
|
dirty(&asblk); |
337 |
|
|
} |
338 |
|
|
} |
339 |
|
|
if (sblock.fs_qfmask != ~sblock.fs_fmask) { |
340 |
|
|
pwarn("INCORRECT QFMASK=%lx IN SUPERBLOCK", |
341 |
|
|
(unsigned long)sblock.fs_qfmask); |
342 |
|
|
sblock.fs_qfmask = ~sblock.fs_fmask; |
343 |
|
|
if (preen) |
344 |
|
|
printf(" (FIXED)\n"); |
345 |
|
|
if (preen || reply("FIX") == 1) { |
346 |
|
|
sbdirty(); |
347 |
|
|
dirty(&asblk); |
348 |
|
|
} |
349 |
|
|
} |
350 |
|
|
if (sblock.fs_cgsize != fragroundup(&sblock, CGSIZE(&sblock))) { |
351 |
|
|
pwarn("INCONSISTENT CGSIZE=%d\n", sblock.fs_cgsize); |
352 |
|
|
sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); |
353 |
|
|
if (preen) |
354 |
|
|
printf(" (FIXED)\n"); |
355 |
|
|
if (preen || reply("FIX") == 1) { |
356 |
|
|
sbdirty(); |
357 |
|
|
dirty(&asblk); |
358 |
|
|
} |
359 |
|
|
} |
360 |
|
|
if (sblock.fs_magic == FS_UFS2_MAGIC) |
361 |
|
|
inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode); |
362 |
|
|
else |
363 |
|
|
inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode); |
364 |
|
|
if (INOPB(&sblock) != inopb) { |
365 |
|
|
pwarn("INCONSISTENT INOPB=%d\n", INOPB(&sblock)); |
366 |
|
|
sblock.fs_inopb = inopb; |
367 |
|
|
if (preen) |
368 |
|
|
printf(" (FIXED)\n"); |
369 |
|
|
if (preen || reply("FIX") == 1) { |
370 |
|
|
sbdirty(); |
371 |
|
|
dirty(&asblk); |
372 |
|
|
} |
373 |
|
|
} |
374 |
|
|
if (sblock.fs_magic == FS_UFS2_MAGIC) |
375 |
|
|
nindir = sblock.fs_bsize / sizeof(int64_t); |
376 |
|
|
else |
377 |
|
|
nindir = sblock.fs_bsize / sizeof(int32_t); |
378 |
|
|
if (NINDIR(&sblock) != nindir) { |
379 |
|
|
pwarn("INCONSISTENT NINDIR=%d\n", NINDIR(&sblock)); |
380 |
|
|
sblock.fs_nindir = nindir; |
381 |
|
|
if (preen) |
382 |
|
|
printf(" (FIXED)\n"); |
383 |
|
|
if (preen || reply("FIX") == 1) { |
384 |
|
|
sbdirty(); |
385 |
|
|
dirty(&asblk); |
386 |
|
|
} |
387 |
|
|
} |
388 |
|
|
if (asblk.b_dirty && !bflag) { |
389 |
|
|
memcpy(&altsblock, &sblock, (size_t)sblock.fs_sbsize); |
390 |
|
|
flush(fswritefd, &asblk); |
391 |
|
|
} |
392 |
|
|
/* |
393 |
|
|
* read in the summary info. |
394 |
|
|
*/ |
395 |
|
|
asked = 0; |
396 |
|
|
sblock.fs_csp = calloc(1, sblock.fs_cssize); |
397 |
|
|
if (sblock.fs_csp == NULL) { |
398 |
|
|
printf("cannot alloc %u bytes for cylinder group summary area\n", |
399 |
|
|
(unsigned)sblock.fs_cssize); |
400 |
|
|
goto badsblabel; |
401 |
|
|
} |
402 |
|
|
for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { |
403 |
|
|
size = sblock.fs_cssize - i < sblock.fs_bsize ? |
404 |
|
|
sblock.fs_cssize - i : sblock.fs_bsize; |
405 |
|
|
if (bread(fsreadfd, (char *)sblock.fs_csp + i, |
406 |
|
|
fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), |
407 |
|
|
size) != 0 && !asked) { |
408 |
|
|
pfatal("BAD SUMMARY INFORMATION"); |
409 |
|
|
if (reply("CONTINUE") == 0) { |
410 |
|
|
ckfini(0); |
411 |
|
|
errexit("%s", ""); |
412 |
|
|
} |
413 |
|
|
asked++; |
414 |
|
|
} |
415 |
|
|
} |
416 |
|
|
/* |
417 |
|
|
* allocate and initialize the necessary maps |
418 |
|
|
*/ |
419 |
|
|
bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t)); |
420 |
|
|
blockmap = calloc(bmapsize, sizeof(char)); |
421 |
|
|
if (blockmap == NULL) { |
422 |
|
|
printf("cannot alloc %zu bytes for blockmap\n", bmapsize); |
423 |
|
|
goto badsblabel; |
424 |
|
|
} |
425 |
|
|
inostathead = calloc((unsigned)(sblock.fs_ncg), |
426 |
|
|
sizeof(struct inostatlist)); |
427 |
|
|
if (inostathead == NULL) { |
428 |
|
|
printf("cannot alloc %zu bytes for inostathead\n", |
429 |
|
|
(unsigned)sblock.fs_ncg * sizeof(struct inostatlist)); |
430 |
|
|
goto badsblabel; |
431 |
|
|
} |
432 |
|
|
numdirs = MAXIMUM(sblock.fs_cstotal.cs_ndir, 128); |
433 |
|
|
inplast = 0; |
434 |
|
|
listmax = numdirs + 10; |
435 |
|
|
inpsort = calloc((unsigned)listmax, sizeof(struct inoinfo *)); |
436 |
|
|
if (inpsort == NULL) { |
437 |
|
|
printf("cannot alloc %zu bytes for inpsort\n", |
438 |
|
|
(unsigned)listmax * sizeof(struct inoinfo *)); |
439 |
|
|
goto badsblabel; |
440 |
|
|
} |
441 |
|
|
inphead = calloc((unsigned)numdirs, sizeof(struct inoinfo *)); |
442 |
|
|
if (inphead == NULL) { |
443 |
|
|
printf("cannot alloc %zu bytes for inphead\n", |
444 |
|
|
(unsigned)numdirs * sizeof(struct inoinfo *)); |
445 |
|
|
goto badsblabel; |
446 |
|
|
} |
447 |
|
|
bufinit(); |
448 |
|
|
if (sblock.fs_flags & FS_DOSOFTDEP) |
449 |
|
|
usedsoftdep = 1; |
450 |
|
|
else |
451 |
|
|
usedsoftdep = 0; |
452 |
|
|
return (1); |
453 |
|
|
|
454 |
|
|
badsblabel: |
455 |
|
|
ckfini(0); |
456 |
|
|
return (0); |
457 |
|
|
} |
458 |
|
|
|
459 |
|
|
/* |
460 |
|
|
* Read in the super block and its summary info. |
461 |
|
|
*/ |
462 |
|
|
static int |
463 |
|
|
readsb(int listerr) |
464 |
|
|
{ |
465 |
|
|
daddr_t super = 0; |
466 |
|
|
int i; |
467 |
|
|
|
468 |
|
|
if (bflag) { |
469 |
|
|
super = bflag; |
470 |
|
|
|
471 |
|
|
if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0) |
472 |
|
|
return (0); |
473 |
|
|
|
474 |
|
|
if (sblock.fs_magic != FS_UFS1_MAGIC && |
475 |
|
|
sblock.fs_magic != FS_UFS2_MAGIC) { |
476 |
|
|
badsb(listerr, "MAGIC NUMBER WRONG"); |
477 |
|
|
return (0); |
478 |
|
|
} |
479 |
|
|
} else { |
480 |
|
|
for (i = 0; sbtry[i] != -1; i++) { |
481 |
|
|
super = sbtry[i] / DEV_BSIZE; |
482 |
|
|
|
483 |
|
|
if (bread(fsreadfd, (char *)&sblock, super, |
484 |
|
|
(long)SBSIZE) != 0) |
485 |
|
|
return (0); |
486 |
|
|
|
487 |
|
|
if (sblock.fs_magic != FS_UFS1_MAGIC && |
488 |
|
|
sblock.fs_magic != FS_UFS2_MAGIC) |
489 |
|
|
continue; /* Not a superblock */ |
490 |
|
|
|
491 |
|
|
/* |
492 |
|
|
* Do not look for an FFS1 file system at SBLOCK_UFS2. |
493 |
|
|
* Doing so will find the wrong super-block for file |
494 |
|
|
* systems with 64k block size. |
495 |
|
|
*/ |
496 |
|
|
if (sblock.fs_magic == FS_UFS1_MAGIC && |
497 |
|
|
sbtry[i] == SBLOCK_UFS2) |
498 |
|
|
continue; |
499 |
|
|
|
500 |
|
|
if (sblock.fs_magic == FS_UFS2_MAGIC && |
501 |
|
|
sblock.fs_sblockloc != sbtry[i]) |
502 |
|
|
continue; /* Not a superblock */ |
503 |
|
|
|
504 |
|
|
break; |
505 |
|
|
} |
506 |
|
|
|
507 |
|
|
if (sbtry[i] == -1) { |
508 |
|
|
badsb(listerr, "MAGIC NUMBER WRONG"); |
509 |
|
|
return (0); |
510 |
|
|
} |
511 |
|
|
} |
512 |
|
|
|
513 |
|
|
sblk.b_bno = super; |
514 |
|
|
sblk.b_size = SBSIZE; |
515 |
|
|
|
516 |
|
|
/* |
517 |
|
|
* run a few consistency checks of the super block |
518 |
|
|
*/ |
519 |
|
|
if (sblock.fs_ncg < 1) { |
520 |
|
|
badsb(listerr, "NCG OUT OF RANGE"); |
521 |
|
|
return (0); |
522 |
|
|
} |
523 |
|
|
if (sblock.fs_cpg < 1) { |
524 |
|
|
badsb(listerr, "CPG OUT OF RANGE"); |
525 |
|
|
return (0); |
526 |
|
|
} |
527 |
|
|
if (sblock.fs_magic == FS_UFS1_MAGIC) { |
528 |
|
|
if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || |
529 |
|
|
(sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) { |
530 |
|
|
badsb(listerr, "NCYL LESS THAN NCG*CPG"); |
531 |
|
|
return (0); |
532 |
|
|
} |
533 |
|
|
} |
534 |
|
|
if (sblock.fs_sbsize > SBSIZE) { |
535 |
|
|
badsb(listerr, "SBSIZE PREPOSTEROUSLY LARGE"); |
536 |
|
|
return (0); |
537 |
|
|
} |
538 |
|
|
|
539 |
|
|
if (!POWEROF2(sblock.fs_bsize) || sblock.fs_bsize < MINBSIZE || |
540 |
|
|
sblock.fs_bsize > MAXBSIZE) { |
541 |
|
|
badsb(listerr, "ILLEGAL BLOCK SIZE IN SUPERBLOCK"); |
542 |
|
|
return (0); |
543 |
|
|
} |
544 |
|
|
|
545 |
|
|
if (!POWEROF2(sblock.fs_fsize) || sblock.fs_fsize > sblock.fs_bsize || |
546 |
|
|
sblock.fs_fsize < sblock.fs_bsize / MAXFRAG) { |
547 |
|
|
badsb(listerr, "ILLEGAL FRAGMENT SIZE IN SUPERBLOCK"); |
548 |
|
|
return (0); |
549 |
|
|
} |
550 |
|
|
|
551 |
|
|
if (bflag) |
552 |
|
|
goto out; |
553 |
|
|
getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); |
554 |
|
|
if (asblk.b_errs) |
555 |
|
|
return (0); |
556 |
|
|
if (cmpsb(&sblock, &altsblock)) { |
557 |
|
|
if (debug) { |
558 |
|
|
long *nlp, *olp, *endlp; |
559 |
|
|
|
560 |
|
|
printf("superblock mismatches\n"); |
561 |
|
|
nlp = (long *)&altsblock; |
562 |
|
|
olp = (long *)&sblock; |
563 |
|
|
endlp = olp + (sblock.fs_sbsize / sizeof *olp); |
564 |
|
|
for ( ; olp < endlp; olp++, nlp++) { |
565 |
|
|
if (*olp == *nlp) |
566 |
|
|
continue; |
567 |
|
|
printf("offset %d, original %ld, alternate %ld\n", |
568 |
|
|
(int)(olp - (long *)&sblock), *olp, *nlp); |
569 |
|
|
} |
570 |
|
|
} |
571 |
|
|
badsb(listerr, |
572 |
|
|
"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN LAST ALTERNATE"); |
573 |
|
|
return (0); |
574 |
|
|
} |
575 |
|
|
out: |
576 |
|
|
if (sblock.fs_magic == FS_UFS1_MAGIC) { |
577 |
|
|
sblock.fs_time = sblock.fs_ffs1_time; |
578 |
|
|
sblock.fs_size = sblock.fs_ffs1_size; |
579 |
|
|
sblock.fs_dsize = sblock.fs_ffs1_dsize; |
580 |
|
|
sblock.fs_csaddr = sblock.fs_ffs1_csaddr; |
581 |
|
|
sblock.fs_cstotal.cs_ndir = sblock.fs_ffs1_cstotal.cs_ndir; |
582 |
|
|
sblock.fs_cstotal.cs_nbfree = sblock.fs_ffs1_cstotal.cs_nbfree; |
583 |
|
|
sblock.fs_cstotal.cs_nifree = sblock.fs_ffs1_cstotal.cs_nifree; |
584 |
|
|
sblock.fs_cstotal.cs_nffree = sblock.fs_ffs1_cstotal.cs_nffree; |
585 |
|
|
} |
586 |
|
|
havesb = 1; |
587 |
|
|
return (1); |
588 |
|
|
} |
589 |
|
|
|
590 |
|
|
void |
591 |
|
|
badsb(int listerr, char *s) |
592 |
|
|
{ |
593 |
|
|
|
594 |
|
|
if (!listerr) |
595 |
|
|
return; |
596 |
|
|
if (preen) |
597 |
|
|
printf("%s: ", cdevname()); |
598 |
|
|
pfatal("BAD SUPER BLOCK: %s\n", s); |
599 |
|
|
} |
600 |
|
|
|
601 |
|
|
/* |
602 |
|
|
* Calculate a prototype superblock based on information in the disk label. |
603 |
|
|
* When done the cgsblock macro can be calculated and the fs_ncg field |
604 |
|
|
* can be used. Do NOT attempt to use other macros without verifying that |
605 |
|
|
* their needed information is available! |
606 |
|
|
*/ |
607 |
|
|
int |
608 |
|
|
calcsb(char *dev, int devfd, struct fs *fs, struct disklabel *lp, |
609 |
|
|
uint32_t sblockloc) |
610 |
|
|
{ |
611 |
|
|
struct partition *pp; |
612 |
|
|
char *cp; |
613 |
|
|
int i; |
614 |
|
|
|
615 |
|
|
cp = strchr(dev, '\0'); |
616 |
|
|
if ((cp == NULL || (cp[-1] < 'a' || cp[-1] >= 'a' + MAXPARTITIONS)) && |
617 |
|
|
!isdigit((unsigned char)cp[-1])) { |
618 |
|
|
pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); |
619 |
|
|
return (0); |
620 |
|
|
} |
621 |
|
|
cp--; |
622 |
|
|
if (lp == NULL) |
623 |
|
|
pfatal("%s: CANNOT READ DISKLABEL\n", dev); |
624 |
|
|
if (isdigit((unsigned char)*cp)) |
625 |
|
|
pp = &lp->d_partitions[0]; |
626 |
|
|
else |
627 |
|
|
pp = &lp->d_partitions[*cp - 'a']; |
628 |
|
|
if (pp->p_fstype != FS_BSDFFS) { |
629 |
|
|
pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", |
630 |
|
|
dev, pp->p_fstype < FSMAXTYPES ? |
631 |
|
|
fstypenames[pp->p_fstype] : "unknown"); |
632 |
|
|
return (0); |
633 |
|
|
} |
634 |
|
|
memset(fs, 0, sizeof(struct fs)); |
635 |
|
|
fs->fs_fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock); |
636 |
|
|
fs->fs_frag = DISKLABELV1_FFS_FRAG(pp->p_fragblock); |
637 |
|
|
fs->fs_fpg = pp->p_cpg * fs->fs_frag; |
638 |
|
|
fs->fs_bsize = fs->fs_fsize * fs->fs_frag; |
639 |
|
|
fs->fs_nspf = DL_SECTOBLK(lp, fs->fs_fsize / lp->d_secsize); |
640 |
|
|
for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) |
641 |
|
|
fs->fs_fsbtodb++; |
642 |
|
|
/* |
643 |
|
|
* fs->fs_size is in fragments, DL_GETPSIZE() is in disk sectors |
644 |
|
|
* and fs_nspf is in DEV_BSIZE blocks. Shake well. |
645 |
|
|
*/ |
646 |
|
|
fs->fs_size = DL_SECTOBLK(lp, DL_GETPSIZE(pp)) / fs->fs_nspf; |
647 |
|
|
fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg); |
648 |
|
|
/* we can't use lp->d_sbsize, it is the max sb size */ |
649 |
|
|
fs->fs_sblkno = roundup( |
650 |
|
|
howmany(sblockloc + SBSIZE, fs->fs_fsize), |
651 |
|
|
fs->fs_frag); |
652 |
|
|
|
653 |
|
|
return (1); |
654 |
|
|
} |
655 |
|
|
|
656 |
|
|
static struct disklabel * |
657 |
|
|
getdisklabel(char *s, int fd) |
658 |
|
|
{ |
659 |
|
|
static struct disklabel lab; |
660 |
|
|
|
661 |
|
|
if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { |
662 |
|
|
if (s == NULL) |
663 |
|
|
return (NULL); |
664 |
|
|
pwarn("ioctl (GCINFO): %s\n", strerror(errno)); |
665 |
|
|
errexit("%s: can't read disk label\n", s); |
666 |
|
|
} |
667 |
|
|
return (&lab); |
668 |
|
|
} |
669 |
|
|
|
670 |
|
|
/* |
671 |
|
|
* Compare two superblocks |
672 |
|
|
*/ |
673 |
|
|
static int |
674 |
|
|
cmpsb(struct fs *sb, struct fs *asb) |
675 |
|
|
{ |
676 |
|
|
/* |
677 |
|
|
* Only compare fields which should be the same, and ignore ones |
678 |
|
|
* likely to change to ensure future compatibility. |
679 |
|
|
*/ |
680 |
|
|
if (asb->fs_sblkno != sb->fs_sblkno || |
681 |
|
|
asb->fs_cblkno != sb->fs_cblkno || |
682 |
|
|
asb->fs_iblkno != sb->fs_iblkno || |
683 |
|
|
asb->fs_dblkno != sb->fs_dblkno || |
684 |
|
|
asb->fs_cgoffset != sb->fs_cgoffset || |
685 |
|
|
asb->fs_cgmask != sb->fs_cgmask || |
686 |
|
|
asb->fs_ncg != sb->fs_ncg || |
687 |
|
|
asb->fs_bsize != sb->fs_bsize || |
688 |
|
|
asb->fs_fsize != sb->fs_fsize || |
689 |
|
|
asb->fs_frag != sb->fs_frag || |
690 |
|
|
asb->fs_bmask != sb->fs_bmask || |
691 |
|
|
asb->fs_fmask != sb->fs_fmask || |
692 |
|
|
asb->fs_bshift != sb->fs_bshift || |
693 |
|
|
asb->fs_fshift != sb->fs_fshift || |
694 |
|
|
asb->fs_fragshift != sb->fs_fragshift || |
695 |
|
|
asb->fs_fsbtodb != sb->fs_fsbtodb || |
696 |
|
|
asb->fs_sbsize != sb->fs_sbsize || |
697 |
|
|
asb->fs_nindir != sb->fs_nindir || |
698 |
|
|
asb->fs_inopb != sb->fs_inopb || |
699 |
|
|
asb->fs_cssize != sb->fs_cssize || |
700 |
|
|
asb->fs_cpg != sb->fs_cpg || |
701 |
|
|
asb->fs_ipg != sb->fs_ipg || |
702 |
|
|
asb->fs_fpg != sb->fs_fpg || |
703 |
|
|
asb->fs_magic != sb->fs_magic) |
704 |
|
|
return (1); |
705 |
|
|
/* they're the same */ |
706 |
|
|
return (0); |
707 |
|
|
} |