ada981b228
the old 8-bit fs_old_flags to the new location the first time that the filesystem is mounted by a new kernel. One of the unused flags in fs_old_flags is used to indicate that the flags have been moved. Leave the fs_old_flags word intact so that it will work properly if used on an old kernel. Change the fs_sblockloc superblock location field to be in units of bytes instead of in units of filesystem fragments. The old units did not work properly when the fragment size exceeeded the superblock size (8192). Update old fs_sblockloc values at the same time that the flags are moved. Suggested by: BOUWSMA Barry <freebsd-misuser@netscum.dyndns.dk> Sponsored by: DARPA & NAI Labs.
502 lines
14 KiB
C
502 lines
14 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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#if 0
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static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/stat.h>
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#define FSTYPENAMES
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#include <sys/disklabel.h>
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#include <sys/file.h>
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#include <sys/sysctl.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdint.h>
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#include <string.h>
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#include "fsck.h"
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struct bufarea asblk;
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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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static void badsb(int listerr, const char *s);
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static int calcsb(char *dev, int devfd, struct fs *fs);
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static struct disklabel *getdisklabel(char *s, int fd);
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/*
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* Read in a superblock finding an alternate if necessary.
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* Return 1 if successful, 0 if unsuccessful, -1 if file system
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* is already clean (preen mode only).
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*/
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int
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setup(char *dev)
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{
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long cg, asked, i, j;
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long bmapsize;
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struct stat statb;
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struct fs proto;
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size_t size;
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havesb = 0;
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fswritefd = -1;
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cursnapshot = 0;
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if (stat(dev, &statb) < 0) {
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printf("Can't stat %s: %s\n", dev, strerror(errno));
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if (bkgrdflag) {
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unlink(snapname);
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bkgrdflag = 0;
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}
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return (0);
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}
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if ((statb.st_mode & S_IFMT) != S_IFCHR &&
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(statb.st_mode & S_IFMT) != S_IFBLK) {
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if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
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unlink(snapname);
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printf("background fsck lacks a snapshot\n");
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exit(EEXIT);
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}
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if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
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cursnapshot = statb.st_ino;
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} else {
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if (cvtlevel == 0 ||
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(statb.st_flags & SF_SNAPSHOT) == 0) {
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if (preen && bkgrdflag) {
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unlink(snapname);
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bkgrdflag = 0;
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}
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pfatal("%s is not a disk device", dev);
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if (reply("CONTINUE") == 0) {
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if (bkgrdflag) {
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unlink(snapname);
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bkgrdflag = 0;
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}
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return (0);
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}
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} else {
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if (bkgrdflag) {
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unlink(snapname);
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bkgrdflag = 0;
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}
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pfatal("cannot convert a snapshot");
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exit(EEXIT);
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}
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}
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}
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if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
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if (bkgrdflag) {
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unlink(snapname);
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bkgrdflag = 0;
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}
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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 (bkgrdflag) {
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unlink(snapname);
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size = MIBSIZE;
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if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
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sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
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sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
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sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
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sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
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pfatal("kernel lacks background fsck support\n");
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exit(EEXIT);
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}
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cmd.version = FFS_CMD_VERSION;
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cmd.handle = fsreadfd;
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fswritefd = -1;
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}
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if (preen == 0)
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printf("** %s", dev);
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if (bkgrdflag == 0 &&
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(nflag || (fswritefd = open(dev, O_WRONLY)) < 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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/*
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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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skipclean = 0;
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if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 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 (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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break;
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}
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if (cg >= proto.fs_ncg) {
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printf("%s %s\n%s %s\n%s %s\n",
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"SEARCH FOR ALTERNATE SUPER-BLOCK",
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"FAILED. YOU MUST USE THE",
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"-b OPTION TO FSCK TO SPECIFY THE",
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"LOCATION OF AN ALTERNATE",
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"SUPER-BLOCK TO SUPPLY NEEDED",
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"INFORMATION; SEE fsck(8).");
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bflag = 0;
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return(0);
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}
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pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
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bflag = 0;
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}
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if (skipclean && preen && sblock.fs_clean) {
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pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
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return (-1);
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}
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maxfsblock = sblock.fs_size;
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maxino = sblock.fs_ncg * sblock.fs_ipg;
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/*
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* Check and potentially fix certain fields in the super block.
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*/
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if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
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pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
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if (reply("SET TO DEFAULT") == 1) {
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sblock.fs_optim = FS_OPTTIME;
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sbdirty();
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}
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}
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if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
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pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
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sblock.fs_minfree);
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if (reply("SET TO DEFAULT") == 1) {
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sblock.fs_minfree = 10;
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sbdirty();
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}
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}
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if (sblock.fs_magic == FS_UFS1_MAGIC &&
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sblock.fs_old_inodefmt < FS_44INODEFMT) {
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pwarn("Format of file system is too old.\n");
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pwarn("Must update to modern format using a version of fsck\n");
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pfatal("from before 2002 with the command ``fsck -c 2''\n");
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exit(EEXIT);
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}
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if (asblk.b_dirty && !bflag) {
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memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
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flush(fswritefd, &asblk);
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}
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/*
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* read in the summary info.
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*/
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asked = 0;
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sblock.fs_csp = calloc(1, sblock.fs_cssize);
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for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
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size = sblock.fs_cssize - i < sblock.fs_bsize ?
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sblock.fs_cssize - i : sblock.fs_bsize;
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if (bread(fsreadfd, (char *)sblock.fs_csp + i,
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fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
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size) != 0 && !asked) {
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pfatal("BAD SUMMARY INFORMATION");
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if (reply("CONTINUE") == 0) {
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ckfini(0);
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exit(EEXIT);
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}
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asked++;
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}
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}
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/*
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* allocate and initialize the necessary maps
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*/
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bmapsize = roundup(howmany(maxfsblock, CHAR_BIT), sizeof(short));
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blockmap = calloc((unsigned)bmapsize, sizeof (char));
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if (blockmap == NULL) {
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printf("cannot alloc %u bytes for blockmap\n",
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(unsigned)bmapsize);
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goto badsb;
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}
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inostathead = calloc((unsigned)(sblock.fs_ncg),
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sizeof(struct inostatlist));
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if (inostathead == NULL) {
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printf("cannot alloc %u bytes for inostathead\n",
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(unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
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goto badsb;
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}
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numdirs = sblock.fs_cstotal.cs_ndir;
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dirhash = numdirs;
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if (numdirs == 0) {
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printf("numdirs is zero, try using an alternate superblock\n");
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goto badsb;
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}
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inplast = 0;
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listmax = numdirs + 10;
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inpsort = (struct inoinfo **)calloc((unsigned)listmax,
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sizeof(struct inoinfo *));
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inphead = (struct inoinfo **)calloc((unsigned)numdirs,
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sizeof(struct inoinfo *));
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if (inpsort == NULL || inphead == NULL) {
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printf("cannot alloc %ju bytes for inphead\n",
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(uintmax_t)numdirs * sizeof(struct inoinfo *));
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goto badsb;
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}
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bufinit();
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if (sblock.fs_flags & FS_DOSOFTDEP)
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usedsoftdep = 1;
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else
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usedsoftdep = 0;
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return (1);
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badsb:
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ckfini(0);
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return (0);
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}
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/*
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* Possible superblock locations ordered from most to least likely.
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*/
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static int sblock_try[] = SBLOCKSEARCH;
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/*
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* Read in the super block and its summary info.
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*/
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int
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readsb(int listerr)
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{
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ufs2_daddr_t super;
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int i;
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if (bflag) {
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super = bflag;
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if ((bread(fsreadfd, (char *)&sblock, super, (long)SBLOCKSIZE)))
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return (0);
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} else {
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for (i = 0; sblock_try[i] != -1; i++) {
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super = sblock_try[i] / dev_bsize;
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if ((bread(fsreadfd, (char *)&sblock, super,
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(long)SBLOCKSIZE)))
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return (0);
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if ((sblock.fs_magic == FS_UFS1_MAGIC ||
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(sblock.fs_magic == FS_UFS2_MAGIC &&
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sblock.fs_sblockloc == sblock_try[i])) &&
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sblock.fs_ncg >= 1 &&
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sblock.fs_bsize >= MINBSIZE &&
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sblock.fs_bsize >= sizeof(struct fs))
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break;
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}
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if (sblock_try[i] == -1) {
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fprintf(stderr, "Cannot find file system superblock\n");
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return (0);
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}
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}
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/*
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* Compute block size that the file system is based on,
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* according to fsbtodb, and adjust superblock block number
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* so we can tell if this is an alternate later.
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*/
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super *= dev_bsize;
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dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
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sblk.b_bno = super / dev_bsize;
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sblk.b_size = SBLOCKSIZE;
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if (bflag) {
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havesb = 1;
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return (1);
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}
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/*
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* Compare all fields that should not differ in alternate super block.
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* When an alternate super-block is specified this check is skipped.
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*/
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getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
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if (asblk.b_errs)
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return (0);
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if (altsblock.fs_sblkno != sblock.fs_sblkno ||
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altsblock.fs_cblkno != sblock.fs_cblkno ||
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altsblock.fs_iblkno != sblock.fs_iblkno ||
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altsblock.fs_dblkno != sblock.fs_dblkno ||
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altsblock.fs_ncg != sblock.fs_ncg ||
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altsblock.fs_bsize != sblock.fs_bsize ||
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altsblock.fs_fsize != sblock.fs_fsize ||
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altsblock.fs_frag != sblock.fs_frag ||
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altsblock.fs_bmask != sblock.fs_bmask ||
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altsblock.fs_fmask != sblock.fs_fmask ||
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altsblock.fs_bshift != sblock.fs_bshift ||
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altsblock.fs_fshift != sblock.fs_fshift ||
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altsblock.fs_fragshift != sblock.fs_fragshift ||
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altsblock.fs_fsbtodb != sblock.fs_fsbtodb ||
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altsblock.fs_sbsize != sblock.fs_sbsize ||
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altsblock.fs_nindir != sblock.fs_nindir ||
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altsblock.fs_inopb != sblock.fs_inopb ||
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altsblock.fs_cssize != sblock.fs_cssize ||
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altsblock.fs_ipg != sblock.fs_ipg ||
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altsblock.fs_fpg != sblock.fs_fpg ||
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altsblock.fs_magic != sblock.fs_magic) {
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badsb(listerr,
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"VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
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return (0);
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}
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/*
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* If not yet done, update UFS1 superblock with new wider fields.
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*/
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if (sblock.fs_magic == FS_UFS1_MAGIC &&
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sblock.fs_maxbsize != sblock.fs_bsize) {
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sblock.fs_maxbsize = sblock.fs_bsize;
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sblock.fs_time = sblock.fs_old_time;
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sblock.fs_size = sblock.fs_old_size;
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sblock.fs_dsize = sblock.fs_old_dsize;
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sblock.fs_csaddr = sblock.fs_old_csaddr;
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sblock.fs_cstotal.cs_ndir = sblock.fs_old_cstotal.cs_ndir;
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sblock.fs_cstotal.cs_nbfree = sblock.fs_old_cstotal.cs_nbfree;
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sblock.fs_cstotal.cs_nifree = sblock.fs_old_cstotal.cs_nifree;
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sblock.fs_cstotal.cs_nffree = sblock.fs_old_cstotal.cs_nffree;
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}
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havesb = 1;
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return (1);
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}
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static void
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badsb(int listerr, const char *s)
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{
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if (!listerr)
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return;
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if (preen)
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printf("%s: ", cdevname);
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pfatal("BAD SUPER BLOCK: %s\n", s);
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}
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void
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sblock_init(void)
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{
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struct disklabel *lp;
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fswritefd = -1;
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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(SBLOCKSIZE);
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asblk.b_un.b_buf = malloc(SBLOCKSIZE);
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if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
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errx(EEXIT, "cannot allocate space for superblock");
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if ((lp = getdisklabel(NULL, fsreadfd)))
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dev_bsize = secsize = lp->d_secsize;
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else
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dev_bsize = secsize = DEV_BSIZE;
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}
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/*
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* Calculate a prototype superblock based on information in the disk label.
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* When done the cgsblock macro can be calculated and the fs_ncg field
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* can be used. Do NOT attempt to use other macros without verifying that
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* their needed information is available!
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*/
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static int
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calcsb(char *dev, int devfd, struct fs *fs)
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{
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struct disklabel *lp;
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struct partition *pp;
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char *cp;
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int i, nspf;
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cp = strchr(dev, '\0') - 1;
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if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
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pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
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return (0);
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}
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lp = getdisklabel(dev, devfd);
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if (isdigit(*cp))
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pp = &lp->d_partitions[0];
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else
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pp = &lp->d_partitions[*cp - 'a'];
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if (pp->p_fstype != FS_BSDFFS) {
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pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
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dev, pp->p_fstype < FSMAXTYPES ?
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fstypenames[pp->p_fstype] : "unknown");
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return (0);
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}
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if (pp->p_fsize == 0 || pp->p_frag == 0 ||
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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);
|
|
}
|