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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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* 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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* 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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* 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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* 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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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1986, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95";
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/resource.h>
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#include <sys/sysctl.h>
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#include <sys/disklabel.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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static void usage(void) __dead2;
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static int argtoi(int flag, const char *req, const char *str, int base);
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static int checkfilesys(char *filesys);
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static int chkdoreload(struct statfs *mntp);
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static struct statfs *getmntpt(const char *);
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main(int argc, char *argv[])
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struct itimerval itimerval;
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while ((ch = getopt(argc, argv, "b:Bc:CdfFm:npry")) != -1) {
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bflag = argtoi('b', "number", optarg, 10);
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printf("Alternate super block location: %d\n", bflag);
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cvtlevel = argtoi('c', "conversion level", optarg, 10);
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errx(EEXIT, "cannot do level %d conversion",
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lfmode = argtoi('m', "mode", optarg, 8);
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errx(EEXIT, "bad mode to -m: %o", lfmode);
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printf("** lost+found creation mode %o\n", lfmode);
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if (signal(SIGINT, SIG_IGN) != SIG_IGN)
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(void)signal(SIGINT, catch);
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(void)signal(SIGQUIT, catchquit);
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signal(SIGINFO, infohandler);
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signal(SIGALRM, alarmhandler);
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itimerval.it_interval.tv_sec = 5;
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itimerval.it_interval.tv_usec = 0;
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itimerval.it_value.tv_sec = 5;
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itimerval.it_value.tv_usec = 0;
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setitimer(ITIMER_REAL, &itimerval, NULL);
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* Push up our allowed memory limit so we can cope
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* with huge file systems.
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if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
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rlimit.rlim_cur = rlimit.rlim_max;
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(void)setrlimit(RLIMIT_DATA, &rlimit);
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(void)checkfilesys(*argv++);
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argtoi(int flag, const char *req, const char *str, int base)
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ret = (int)strtol(str, &cp, base);
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if (cp == str || *cp)
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errx(EEXIT, "-%c flag requires a %s", flag, req);
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* Check the specified file system.
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checkfilesys(char *filesys)
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ufs2_daddr_t n_ffree, n_bfree;
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if (debug && ckclean)
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* Make best effort to get the disk name. Check first to see
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* if it is listed among the mounted file systems. Failing that
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* check to see if it is listed in /etc/fstab.
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mntp = getmntpt(filesys);
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filesys = mntp->f_mntfromname;
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filesys = blockcheck(filesys);
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* If -F flag specified, check to see whether a background check
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* is possible and needed. If possible and needed, exit with
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* status zero. Otherwise exit with status non-zero. A non-zero
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* exit status will cause a foreground check to be run.
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if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
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exit(3); /* Cannot read superblock */
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if (sblock.fs_flags & FS_NEEDSFSCK)
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exit(4); /* Earlier background failed */
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if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
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exit(5); /* Not running soft updates */
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if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
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exit(6); /* Lacks kernel support */
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if ((mntp == NULL && sblock.fs_clean == 1) ||
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(mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
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exit(7); /* Filesystem clean, report it now */
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if (ckclean && skipclean) {
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* If file system is gjournaled, check it here.
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if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
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exit(3); /* Cannot read superblock */
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if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
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//printf("GJournaled file system detected on %s.\n",
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if (sblock.fs_clean == 1) {
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pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
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if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
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gjournal_check(filesys);
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if (chkdoreload(mntp) == 0)
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pfatal("UNEXPECTED INCONSISTENCY, %s\n",
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"CANNOT RUN FAST FSCK\n");
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* If we are to do a background check:
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* Get the mount point information of the file system
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* create snapshot file
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* return created snapshot file
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* if not found, clear bkgrdflag and proceed with normal fsck
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pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
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} else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
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pfatal("NOT USING SOFT UPDATES, %s\n",
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"CANNOT RUN IN BACKGROUND");
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} else if ((mntp->f_flags & MNT_RDONLY) != 0) {
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pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
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} else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
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if (readsb(0) != 0) {
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if (sblock.fs_flags & FS_NEEDSFSCK) {
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pfatal("UNEXPECTED INCONSISTENCY, %s\n",
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"CANNOT RUN IN BACKGROUND\n");
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if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
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skipclean && ckclean) {
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* file system is clean;
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* skip snapshot and report it clean
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pwarn("FILE SYSTEM CLEAN; %s\n",
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snprintf(snapname, sizeof snapname, "%s/.snap",
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if (stat(snapname, &snapdir) < 0) {
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if (errno != ENOENT) {
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pfatal("CANNOT FIND %s %s: %s, %s\n",
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"SNAPSHOT DIRECTORY",
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snapname, strerror(errno),
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"CANNOT RUN IN BACKGROUND");
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} else if ((grp = getgrnam("operator")) == 0 ||
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mkdir(snapname, 0770) < 0 ||
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chown(snapname, -1, grp->gr_gid) < 0 ||
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chmod(snapname, 0770) < 0) {
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pfatal("CANNOT CREATE %s %s: %s, %s\n",
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"SNAPSHOT DIRECTORY",
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snapname, strerror(errno),
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"CANNOT RUN IN BACKGROUND");
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} else if (!S_ISDIR(snapdir.st_mode)) {
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pfatal("%s IS NOT A DIRECTORY, %s\n", snapname,
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"CANNOT RUN IN BACKGROUND");
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snprintf(snapname, sizeof snapname,
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"%s/.snap/fsck_snapshot", mntp->f_mntonname);
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build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
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build_iovec(&iov, &iovlen, "from", snapname,
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build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
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build_iovec(&iov, &iovlen, "errmsg", errmsg,
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build_iovec(&iov, &iovlen, "update", NULL, 0);
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build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
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while (nmount(iov, iovlen, mntp->f_flags) < 0) {
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if (errno == EEXIST && unlink(snapname) == 0)
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pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
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snapname, strerror(errno), errmsg);
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switch (setup(filesys)) {
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pfatal("CAN'T CHECK FILE SYSTEM.");
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pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
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sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
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printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n",
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(long long)sblock.fs_cstotal.cs_nffree,
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(long long)sblock.fs_cstotal.cs_nbfree,
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sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
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* Cleared if any questions answered no. Used to decide if
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* the superblock should be marked clean.
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* 1: scan inodes tallying blocks used
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printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
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if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
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printf("** Root file system\n");
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printf("** Phase 1 - Check Blocks and Sizes\n");
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* 1b: locate first references to duplicates, if any
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if (preen || usedsoftdep)
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pfatal("INTERNAL ERROR: dups with -p");
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printf("** Phase 1b - Rescan For More DUPS\n");
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* 2: traverse directories from root to mark all connected directories
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printf("** Phase 2 - Check Pathnames\n");
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* 3: scan inodes looking for disconnected directories
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printf("** Phase 3 - Check Connectivity\n");
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* 4: scan inodes looking for disconnected files; check reference counts
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printf("** Phase 4 - Check Reference Counts\n");
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* 5: check and repair resource counts in cylinder groups
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printf("** Phase 5 - Check Cyl groups\n");
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* print out summary statistics
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n_ffree = sblock.fs_cstotal.cs_nffree;
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n_bfree = sblock.fs_cstotal.cs_nbfree;
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files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
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sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
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blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
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blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
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blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
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if (bkgrdflag && (files > 0 || blks > 0)) {
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countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
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pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n",
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countdirs, (long)files - countdirs, (long long)blks);
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pwarn("%ld files, %jd used, %ju free ",
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(long)n_files, (intmax_t)n_blks,
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(uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
461
printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
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(uintmax_t)n_ffree, (uintmax_t)n_bfree,
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n_ffree * 100.0 / sblock.fs_dsize);
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printf("%d inodes missing\n", -files);
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printf("%lld blocks missing\n", -(long long)blks);
469
if (duplist != NULL) {
470
printf("The following duplicate blocks remain:");
471
for (dp = duplist; dp; dp = dp->next)
472
printf(" %lld,", (long long)dp->dup);
476
duplist = (struct dups *)0;
477
muldup = (struct dups *)0;
480
sblock.fs_time = time(NULL);
483
if (cvtlevel && sblk.b_dirty) {
485
* Write out the duplicate super blocks
487
for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
488
blwrite(fswritefd, (char *)&sblock,
489
fsbtodb(&sblock, cgsblock(&sblock, cylno)),
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* Check to see if the file system is mounted read-write.
498
if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
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for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
503
if (inostathead[cylno].il_stat != NULL)
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free((char *)inostathead[cylno].il_stat);
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free((char *)inostathead);
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if (fsmodified && !preen)
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printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
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printf("\n***** PLEASE RERUN FSCK *****\n");
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if (chkdoreload(mntp) != 0) {
515
printf("\n***** REBOOT NOW *****\n");
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chkdoreload(struct statfs *mntp)
536
* We modified a mounted file system. Do a mount update on
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* it unless it is read-write, so we can continue using it
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* as safely as possible.
540
if (mntp->f_flags & MNT_RDONLY) {
541
build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
542
build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
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build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
546
build_iovec(&iov, &iovlen, "errmsg", errmsg,
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build_iovec(&iov, &iovlen, "update", NULL, 0);
549
build_iovec(&iov, &iovlen, "reload", NULL, 0);
551
* XX: We need the following line until we clean up
552
* nmount parsing of root mounts and NFS root mounts.
554
build_iovec(&iov, &iovlen, "ro", NULL, 0);
555
if (nmount(iov, iovlen, mntp->f_flags) == 0) {
558
pwarn("mount reload of '%s' failed: %s %s\n\n",
559
mntp->f_mntonname, strerror(errno), errmsg);
566
* Get the mount point information for name.
568
static struct statfs *
569
getmntpt(const char *name)
571
struct stat devstat, mntdevstat;
572
char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
574
struct statfs *mntbuf, *statfsp;
575
int i, mntsize, isdev;
577
if (stat(name, &devstat) != 0)
579
if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
583
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
584
for (i = 0; i < mntsize; i++) {
585
statfsp = &mntbuf[i];
586
ddevname = statfsp->f_mntfromname;
587
if (*ddevname != '/') {
588
strcpy(device, _PATH_DEV);
589
strcat(device, ddevname);
590
strcpy(statfsp->f_mntfromname, device);
593
if (strcmp(name, statfsp->f_mntonname))
597
if (stat(ddevname, &mntdevstat) == 0 &&
598
mntdevstat.st_rdev == devstat.st_rdev)
608
(void) fprintf(stderr,
609
"usage: %s [-BFprfny] [-b block] [-c level] [-m mode] "
added
removed
.pc/02_fsck.ufs.patch/sbin/fsck_ffs/main.c
