2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static const char copyright[] =
35 "@(#) Copyright (c) 1980, 1986, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
40 static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95";
43 #include <sys/cdefs.h>
44 __FBSDID("$FreeBSD$");
46 #define IN_RTLD /* So we pickup the P_OSREL defines */
47 #include <sys/param.h>
49 #include <sys/mount.h>
50 #include <sys/resource.h>
52 #include <sys/sysctl.h>
54 #include <sys/disklabel.h>
56 #include <ufs/ufs/dinode.h>
57 #include <ufs/ffs/fs.h>
75 static void usage(void) __dead2;
76 static intmax_t argtoimax(int flag, const char *req, const char *str, int base);
77 static int checkfilesys(char *filesys);
78 static int chkdoreload(struct statfs *mntp);
79 static struct statfs *getmntpt(const char *);
82 main(int argc, char *argv[])
86 struct itimerval itimerval;
93 while ((ch = getopt(argc, argv, "b:Bc:CdEfFm:npRrSyZz")) != -1) {
97 bflag = argtoimax('b', "number", optarg, 10);
98 printf("Alternate super block location: %jd\n", bflag);
107 cvtlevel = argtoimax('c', "conversion level", optarg,
110 errx(EEXIT, "cannot do level %d conversion",
131 lfmode = argtoimax('m', "mode", optarg, 8);
133 errx(EEXIT, "bad mode to -m: %o", lfmode);
134 printf("** lost+found creation mode %o\n", lfmode);
184 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
185 (void)signal(SIGINT, catch);
187 (void)signal(SIGQUIT, catchquit);
188 signal(SIGINFO, infohandler);
190 signal(SIGALRM, alarmhandler);
191 itimerval.it_interval.tv_sec = 5;
192 itimerval.it_interval.tv_usec = 0;
193 itimerval.it_value.tv_sec = 5;
194 itimerval.it_value.tv_usec = 0;
195 setitimer(ITIMER_REAL, &itimerval, NULL);
198 * Push up our allowed memory limit so we can cope
199 * with huge file systems.
201 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
202 rlimit.rlim_cur = rlimit.rlim_max;
203 (void)setrlimit(RLIMIT_DATA, &rlimit);
206 if ((fsret = checkfilesys(*argv)) == ERESTART)
219 argtoimax(int flag, const char *req, const char *str, int base)
224 ret = strtoimax(str, &cp, base);
225 if (cp == str || *cp)
226 errx(EEXIT, "-%c flag requires a %s", flag, req);
231 * Check the specified file system.
235 checkfilesys(char *filesys)
237 ufs2_daddr_t n_ffree, n_bfree;
246 intmax_t blks, files;
256 if (debug && ckclean)
259 * Make best effort to get the disk name. Check first to see
260 * if it is listed among the mounted file systems. Failing that
261 * check to see if it is listed in /etc/fstab.
263 mntp = getmntpt(filesys);
265 filesys = mntp->f_mntfromname;
267 filesys = blockcheck(filesys);
269 * If -F flag specified, check to see whether a background check
270 * is possible and needed. If possible and needed, exit with
271 * status zero. Otherwise exit with status non-zero. A non-zero
272 * exit status will cause a foreground check to be run.
276 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
277 exit(3); /* Cannot read superblock */
279 /* Earlier background failed or journaled */
280 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ))
282 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
283 exit(5); /* Not running soft updates */
285 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
286 exit(6); /* Lacks kernel support */
287 if ((mntp == NULL && sblock.fs_clean == 1) ||
288 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
289 exit(7); /* Filesystem clean, report it now */
292 if (ckclean && skipclean) {
294 * If file system is gjournaled, check it here.
296 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
297 exit(3); /* Cannot read superblock */
298 if (nflag || (fswritefd = open(filesys, O_WRONLY)) < 0) {
301 pfatal("NO WRITE ACCESS");
302 printf(" (NO WRITE)");
304 if ((sblock.fs_flags & FS_GJOURNAL) != 0) {
305 //printf("GJournaled file system detected on %s.\n",
307 if (sblock.fs_clean == 1) {
308 pwarn("FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
311 if ((sblock.fs_flags & (FS_UNCLEAN | FS_NEEDSFSCK)) == 0) {
312 gjournal_check(filesys);
313 if (chkdoreload(mntp) == 0)
318 "UNEXPECTED INCONSISTENCY, CANNOT RUN FAST FSCK\n");
325 * If we are to do a background check:
326 * Get the mount point information of the file system
327 * create snapshot file
328 * return created snapshot file
329 * if not found, clear bkgrdflag and proceed with normal fsck
334 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
335 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
338 "NOT USING SOFT UPDATES, CANNOT RUN IN BACKGROUND\n");
339 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
341 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
342 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
343 if (readsb(0) != 0) {
344 if (sblock.fs_flags & (FS_NEEDSFSCK | FS_SUJ)) {
347 "UNEXPECTED INCONSISTENCY, CANNOT RUN IN BACKGROUND\n");
349 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
350 skipclean && ckclean) {
352 * file system is clean;
353 * skip snapshot and report it clean
356 "FILE SYSTEM CLEAN; SKIPPING CHECKS\n");
363 snprintf(snapname, sizeof snapname, "%s/.snap",
365 if (stat(snapname, &snapdir) < 0) {
366 if (errno != ENOENT) {
369 "CANNOT FIND SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
370 snapname, strerror(errno));
371 } else if ((grp = getgrnam("operator")) == NULL ||
372 mkdir(snapname, 0770) < 0 ||
373 chown(snapname, -1, grp->gr_gid) < 0 ||
374 chmod(snapname, 0770) < 0) {
377 "CANNOT CREATE SNAPSHOT DIRECTORY %s: %s, CANNOT RUN IN BACKGROUND\n",
378 snapname, strerror(errno));
380 } else if (!S_ISDIR(snapdir.st_mode)) {
383 "%s IS NOT A DIRECTORY, CANNOT RUN IN BACKGROUND\n",
388 snprintf(snapname, sizeof snapname,
389 "%s/.snap/fsck_snapshot", mntp->f_mntonname);
390 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
391 build_iovec(&iov, &iovlen, "from", snapname,
393 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
395 build_iovec(&iov, &iovlen, "errmsg", errmsg,
397 build_iovec(&iov, &iovlen, "update", NULL, 0);
398 build_iovec(&iov, &iovlen, "snapshot", NULL, 0);
400 while (nmount(iov, iovlen, mntp->f_flags) < 0) {
401 if (errno == EEXIST && unlink(snapname) == 0)
404 pfatal("CANNOT CREATE SNAPSHOT %s: %s %s\n",
405 snapname, strerror(errno), errmsg);
413 switch (setup(filesys)) {
416 pfatal("CAN'T CHECK FILE SYSTEM.");
420 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
421 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
422 printf("(%jd frags, %jd blocks, %.1f%% fragmentation)\n",
423 (intmax_t)sblock.fs_cstotal.cs_nffree,
424 (intmax_t)sblock.fs_cstotal.cs_nbfree,
425 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
429 * Determine if we can and should do journal recovery.
431 if ((sblock.fs_flags & FS_SUJ) == FS_SUJ) {
432 if ((sblock.fs_flags & FS_NEEDSFSCK) != FS_NEEDSFSCK && skipclean) {
434 if (suj_check(filesys) == 0) {
435 printf("\n***** FILE SYSTEM MARKED CLEAN *****\n");
436 if (chkdoreload(mntp) == 0)
441 printf("** Skipping journal, falling through to full fsck\n\n");
444 * Write the superblock so we don't try to recover the
445 * journal on another pass. If this is the only change
446 * to the filesystem, we do not want it to be called
449 sblock.fs_mtime = time(NULL);
451 ofsmodified = fsmodified;
452 flush(fswritefd, &sblk);
453 fsmodified = ofsmodified;
456 * If the filesystem was run on an old kernel that did not
457 * support check hashes, clear the check-hash flags so that
458 * we do not try to verify them.
460 if ((sblock.fs_flags & FS_METACKHASH) == 0)
461 sblock.fs_metackhash = 0;
463 * If we are running on a kernel that can provide check hashes
464 * that are not yet enabled for the filesystem and we are
465 * running manually without the -y flag, offer to add any
466 * supported check hashes that are not already enabled.
469 if (preen == 0 && yflag == 0 && sblock.fs_magic != FS_UFS1_MAGIC &&
470 fswritefd != -1 && getosreldate() >= P_OSREL_CK_CYLGRP) {
471 if ((sblock.fs_metackhash & CK_CYLGRP) == 0 &&
472 reply("ADD CYLINDER GROUP CHECK-HASH PROTECTION") != 0) {
473 ckhashadd |= CK_CYLGRP;
474 sblock.fs_metackhash |= CK_CYLGRP;
476 if ((sblock.fs_metackhash & CK_SUPERBLOCK) == 0 &&
477 getosreldate() >= P_OSREL_CK_SUPERBLOCK &&
478 reply("ADD SUPERBLOCK CHECK-HASH PROTECTION") != 0) {
479 ckhashadd |= CK_SUPERBLOCK;
480 sblock.fs_metackhash |= CK_SUPERBLOCK;
482 if ((sblock.fs_metackhash & CK_INODE) == 0 &&
483 getosreldate() >= P_OSREL_CK_INODE &&
484 reply("ADD INODE CHECK-HASH PROTECTION") != 0) {
485 ckhashadd |= CK_INODE;
486 sblock.fs_metackhash |= CK_INODE;
489 if ((sblock.fs_metackhash & CK_INDIR) == 0 &&
490 getosreldate() >= P_OSREL_CK_INDIR &&
491 reply("ADD INDIRECT BLOCK CHECK-HASH PROTECTION") != 0) {
492 ckhashadd |= CK_INDIR;
493 sblock.fs_metackhash |= CK_INDIR;
495 if ((sblock.fs_metackhash & CK_DIR) == 0 &&
496 getosreldate() >= P_OSREL_CK_DIR &&
497 reply("ADD DIRECTORY CHECK-HASH PROTECTION") != 0) {
499 sblock.fs_metackhash |= CK_DIR;
502 if (ckhashadd != 0) {
503 sblock.fs_flags |= FS_METACKHASH;
508 * Cleared if any questions answered no. Used to decide if
509 * the superblock should be marked clean.
513 * 1: scan inodes tallying blocks used
516 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
517 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
518 printf("** Root file system\n");
519 printf("** Phase 1 - Check Blocks and Sizes\n");
521 clock_gettime(CLOCK_REALTIME_PRECISE, &startprog);
526 * 1b: locate first references to duplicates, if any
529 if (preen || usedsoftdep)
530 pfatal("INTERNAL ERROR: dups with %s%s%s",
532 (preen && usedsoftdep) ? " and " : "",
533 usedsoftdep ? "softupdates" : "");
534 printf("** Phase 1b - Rescan For More DUPS\n");
540 * 2: traverse directories from root to mark all connected directories
543 printf("** Phase 2 - Check Pathnames\n");
548 * 3: scan inodes looking for disconnected directories
551 printf("** Phase 3 - Check Connectivity\n");
556 * 4: scan inodes looking for disconnected files; check reference counts
559 printf("** Phase 4 - Check Reference Counts\n");
564 * 5: check and repair resource counts in cylinder groups
567 printf("** Phase 5 - Check Cyl groups\n");
572 * print out summary statistics
574 n_ffree = sblock.fs_cstotal.cs_nffree;
575 n_bfree = sblock.fs_cstotal.cs_nbfree;
576 files = maxino - UFS_ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
578 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
579 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
580 blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
581 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
582 if (bkgrdflag && (files > 0 || blks > 0)) {
583 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
584 pwarn("Reclaimed: %ld directories, %jd files, %jd fragments\n",
585 countdirs, files - countdirs, blks);
587 pwarn("%ld files, %jd used, %ju free ",
588 (long)n_files, (intmax_t)n_blks,
589 (uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
590 printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
591 (uintmax_t)n_ffree, (uintmax_t)n_bfree,
592 n_ffree * 100.0 / sblock.fs_dsize);
595 printf("%jd inodes missing\n", -files);
597 printf("%jd blocks missing\n", -blks);
598 if (duplist != NULL) {
599 printf("The following duplicate blocks remain:");
600 for (dp = duplist; dp; dp = dp->next)
601 printf(" %jd,", (intmax_t)dp->dup);
605 duplist = (struct dups *)0;
606 muldup = (struct dups *)0;
609 sblock.fs_time = time(NULL);
612 if (cvtlevel && (sblk.b_flags & B_DIRTY) != 0) {
614 * Write out the duplicate super blocks
616 if (sbput(fswritefd, &sblock, sblock.fs_ncg) == 0)
623 * Check to see if the file system is mounted read-write.
625 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
629 if (fsmodified && !preen)
630 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
632 if (wantrestart && (restarts++ < 10) &&
633 (preen || reply("RESTART")))
635 printf("\n***** PLEASE RERUN FSCK *****\n");
637 if (chkdoreload(mntp) != 0) {
641 printf("\n***** REBOOT NOW *****\n");
645 return (rerun ? ERERUN : 0);
649 chkdoreload(struct statfs *mntp)
662 * We modified a mounted file system. Do a mount update on
663 * it unless it is read-write, so we can continue using it
664 * as safely as possible.
666 if (mntp->f_flags & MNT_RDONLY) {
667 build_iovec(&iov, &iovlen, "fstype", "ffs", 4);
668 build_iovec(&iov, &iovlen, "from", mntp->f_mntfromname,
670 build_iovec(&iov, &iovlen, "fspath", mntp->f_mntonname,
672 build_iovec(&iov, &iovlen, "errmsg", errmsg,
674 build_iovec(&iov, &iovlen, "update", NULL, 0);
675 build_iovec(&iov, &iovlen, "reload", NULL, 0);
677 * XX: We need the following line until we clean up
678 * nmount parsing of root mounts and NFS root mounts.
680 build_iovec(&iov, &iovlen, "ro", NULL, 0);
681 if (nmount(iov, iovlen, mntp->f_flags) == 0) {
684 pwarn("mount reload of '%s' failed: %s %s\n\n",
685 mntp->f_mntonname, strerror(errno), errmsg);
692 * Get the mount point information for name.
694 static struct statfs *
695 getmntpt(const char *name)
697 struct stat devstat, mntdevstat;
698 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
700 struct statfs *mntbuf, *statfsp;
701 int i, mntsize, isdev;
703 if (stat(name, &devstat) != 0)
705 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
709 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
710 for (i = 0; i < mntsize; i++) {
711 statfsp = &mntbuf[i];
712 ddevname = statfsp->f_mntfromname;
713 if (*ddevname != '/') {
714 if (strlen(_PATH_DEV) + strlen(ddevname) + 1 >
715 sizeof(statfsp->f_mntfromname))
717 strcpy(device, _PATH_DEV);
718 strcat(device, ddevname);
719 strcpy(statfsp->f_mntfromname, device);
722 if (strcmp(name, statfsp->f_mntonname))
726 if (stat(ddevname, &mntdevstat) == 0 &&
727 mntdevstat.st_rdev == devstat.st_rdev)
737 (void) fprintf(stderr,
738 "usage: %s [-BCdEFfnpRrSyZ] [-b block] [-c level] [-m mode] filesystem ...\n",
744 infohandler(int sig __unused)
750 alarmhandler(int sig __unused)