FreeBSD-5.3/sbin/fsck_ffs/main.c
/*
* Copyright (c) 1980, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if 0
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1986, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sbin/fsck_ffs/main.c,v 1.41 2004/04/09 19:58:28 markm Exp $");
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/time.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <sys/disklabel.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ufs/ufsmount.h>
#include <ufs/ffs/fs.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <paths.h>
#include <stdint.h>
#include <string.h>
#include "fsck.h"
static void usage(void) __dead2;
static int argtoi(int flag, const char *req, const char *str, int base);
static int checkfilesys(char *filesys);
static struct statfs *getmntpt(const char *);
int
main(int argc, char *argv[])
{
int ch;
struct rlimit rlimit;
struct itimerval itimerval;
int ret = 0;
sync();
skipclean = 1;
while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) {
switch (ch) {
case 'b':
skipclean = 0;
bflag = argtoi('b', "number", optarg, 10);
printf("Alternate super block location: %d\n", bflag);
break;
case 'B':
bkgrdflag = 1;
break;
case 'c':
skipclean = 0;
cvtlevel = argtoi('c', "conversion level", optarg, 10);
if (cvtlevel < 3)
errx(EEXIT, "cannot do level %d conversion",
cvtlevel);
break;
case 'd':
debug++;
break;
case 'f':
skipclean = 0;
break;
case 'F':
bkgrdcheck = 1;
break;
case 'm':
lfmode = argtoi('m', "mode", optarg, 8);
if (lfmode &~ 07777)
errx(EEXIT, "bad mode to -m: %o", lfmode);
printf("** lost+found creation mode %o\n", lfmode);
break;
case 'n':
nflag++;
yflag = 0;
break;
case 'p':
preen++;
break;
case 'y':
yflag++;
nflag = 0;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!argc)
usage();
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
(void)signal(SIGINT, catch);
if (preen)
(void)signal(SIGQUIT, catchquit);
signal(SIGINFO, infohandler);
if (bkgrdflag) {
signal(SIGALRM, alarmhandler);
itimerval.it_interval.tv_sec = 5;
itimerval.it_interval.tv_usec = 0;
itimerval.it_value.tv_sec = 5;
itimerval.it_value.tv_usec = 0;
setitimer(ITIMER_REAL, &itimerval, NULL);
}
/*
* Push up our allowed memory limit so we can cope
* with huge file systems.
*/
if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
rlimit.rlim_cur = rlimit.rlim_max;
(void)setrlimit(RLIMIT_DATA, &rlimit);
}
while (argc-- > 0)
(void)checkfilesys(*argv++);
if (returntosingle)
ret = 2;
exit(ret);
}
static int
argtoi(int flag, const char *req, const char *str, int base)
{
char *cp;
int ret;
ret = (int)strtol(str, &cp, base);
if (cp == str || *cp)
errx(EEXIT, "-%c flag requires a %s", flag, req);
return (ret);
}
/*
* Check the specified file system.
*/
/* ARGSUSED */
static int
checkfilesys(char *filesys)
{
ufs2_daddr_t n_ffree, n_bfree;
struct ufs_args args;
struct dups *dp;
struct statfs *mntp;
struct zlncnt *zlnp;
struct stat snapdir;
struct group *grp;
ufs2_daddr_t blks;
int cylno, ret;
ino_t files;
size_t size;
cdevname = filesys;
if (debug && preen)
pwarn("starting\n");
/*
* Make best effort to get the disk name. Check first to see
* if it is listed among the mounted file systems. Failing that
* check to see if it is listed in /etc/fstab.
*/
mntp = getmntpt(filesys);
if (mntp != NULL)
filesys = mntp->f_mntfromname;
else
filesys = blockcheck(filesys);
/*
* If -F flag specified, check to see whether a background check
* is possible and needed. If possible and needed, exit with
* status zero. Otherwise exit with status non-zero. A non-zero
* exit status will cause a foreground check to be run.
*/
sblock_init();
if (bkgrdcheck) {
if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
exit(3); /* Cannot read superblock */
close(fsreadfd);
if (sblock.fs_flags & FS_NEEDSFSCK)
exit(4); /* Earlier background failed */
if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
exit(5); /* Not running soft updates */
size = MIBSIZE;
if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
exit(6); /* Lacks kernel support */
if ((mntp == NULL && sblock.fs_clean == 1) ||
(mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
exit(7); /* Filesystem clean, report it now */
exit(0);
}
/*
* If we are to do a background check:
* Get the mount point information of the file system
* create snapshot file
* return created snapshot file
* if not found, clear bkgrdflag and proceed with normal fsck
*/
if (bkgrdflag) {
if (mntp == NULL) {
bkgrdflag = 0;
pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
} else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
bkgrdflag = 0;
pfatal("NOT USING SOFT UPDATES, %s\n",
"CANNOT RUN IN BACKGROUND");
} else if ((mntp->f_flags & MNT_RDONLY) != 0) {
bkgrdflag = 0;
pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
} else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
if (readsb(0) != 0) {
if (sblock.fs_flags & FS_NEEDSFSCK) {
bkgrdflag = 0;
pfatal("UNEXPECTED INCONSISTENCY, %s\n",
"CANNOT RUN IN BACKGROUND\n");
}
if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
skipclean && preen) {
/*
* file system is clean;
* skip snapshot and report it clean
*/
pwarn("FILE SYSTEM CLEAN; %s\n",
"SKIPPING CHECKS");
goto clean;
}
}
close(fsreadfd);
}
if (bkgrdflag) {
snprintf(snapname, sizeof snapname, "%s/.snap",
mntp->f_mntonname);
if (stat(snapname, &snapdir) < 0) {
if (errno != ENOENT) {
bkgrdflag = 0;
pfatal("CANNOT FIND %s %s: %s, %s\n",
"SNAPSHOT DIRECTORY",
snapname, strerror(errno),
"CANNOT RUN IN BACKGROUND");
} else if ((grp = getgrnam("operator")) == 0 ||
mkdir(snapname, 0770) < 0 ||
chown(snapname, -1, grp->gr_gid) < 0 ||
chmod(snapname, 0770) < 0) {
bkgrdflag = 0;
pfatal("CANNOT CREATE %s %s: %s, %s\n",
"SNAPSHOT DIRECTORY",
snapname, strerror(errno),
"CANNOT RUN IN BACKGROUND");
}
} else if (!S_ISDIR(snapdir.st_mode)) {
bkgrdflag = 0;
pfatal("%s IS NOT A DIRECTORY, %s\n", snapname,
"CANNOT RUN IN BACKGROUND");
}
}
if (bkgrdflag) {
snprintf(snapname, sizeof snapname,
"%s/.snap/fsck_snapshot", mntp->f_mntonname);
args.fspec = snapname;
while (mount("ffs", mntp->f_mntonname,
mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT,
&args) < 0) {
if (errno == EEXIST && unlink(snapname) == 0)
continue;
bkgrdflag = 0;
pfatal("CANNOT CREATE SNAPSHOT %s: %s\n",
snapname, strerror(errno));
break;
}
if (bkgrdflag != 0)
filesys = snapname;
}
}
switch (setup(filesys)) {
case 0:
if (preen)
pfatal("CAN'T CHECK FILE SYSTEM.");
return (0);
case -1:
clean:
pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
printf("(%lld frags, %lld blocks, %.1f%% fragmentation)\n",
(long long)sblock.fs_cstotal.cs_nffree,
(long long)sblock.fs_cstotal.cs_nbfree,
sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
return (0);
}
/*
* Cleared if any questions answered no. Used to decide if
* the superblock should be marked clean.
*/
resolved = 1;
/*
* 1: scan inodes tallying blocks used
*/
if (preen == 0) {
printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
printf("** Root file system\n");
printf("** Phase 1 - Check Blocks and Sizes\n");
}
pass1();
/*
* 1b: locate first references to duplicates, if any
*/
if (duplist) {
if (preen || usedsoftdep)
pfatal("INTERNAL ERROR: dups with -p");
printf("** Phase 1b - Rescan For More DUPS\n");
pass1b();
}
/*
* 2: traverse directories from root to mark all connected directories
*/
if (preen == 0)
printf("** Phase 2 - Check Pathnames\n");
pass2();
/*
* 3: scan inodes looking for disconnected directories
*/
if (preen == 0)
printf("** Phase 3 - Check Connectivity\n");
pass3();
/*
* 4: scan inodes looking for disconnected files; check reference counts
*/
if (preen == 0)
printf("** Phase 4 - Check Reference Counts\n");
pass4();
/*
* 5: check and repair resource counts in cylinder groups
*/
if (preen == 0)
printf("** Phase 5 - Check Cyl groups\n");
pass5();
/*
* print out summary statistics
*/
n_ffree = sblock.fs_cstotal.cs_nffree;
n_bfree = sblock.fs_cstotal.cs_nbfree;
files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
blks = n_blks +
sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
if (bkgrdflag && (files > 0 || blks > 0)) {
countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
pwarn("Reclaimed: %ld directories, %ld files, %lld fragments\n",
countdirs, (long)files - countdirs, (long long)blks);
}
pwarn("%ld files, %jd used, %ju free ",
(long)n_files, (intmax_t)n_blks,
(uintmax_t)n_ffree + sblock.fs_frag * n_bfree);
printf("(%ju frags, %ju blocks, %.1f%% fragmentation)\n",
(uintmax_t)n_ffree, (uintmax_t)n_bfree,
n_ffree * 100.0 / sblock.fs_dsize);
if (debug) {
if (files < 0)
printf("%d inodes missing\n", -files);
if (blks < 0)
printf("%lld blocks missing\n", -(long long)blks);
if (duplist != NULL) {
printf("The following duplicate blocks remain:");
for (dp = duplist; dp; dp = dp->next)
printf(" %lld,", (long long)dp->dup);
printf("\n");
}
if (zlnhead != NULL) {
printf("The following zero link count inodes remain:");
for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
printf(" %u,", zlnp->zlncnt);
printf("\n");
}
}
zlnhead = (struct zlncnt *)0;
duplist = (struct dups *)0;
muldup = (struct dups *)0;
inocleanup();
if (fsmodified) {
sblock.fs_time = time(NULL);
sbdirty();
}
if (cvtlevel && sblk.b_dirty) {
/*
* Write out the duplicate super blocks
*/
for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
bwrite(fswritefd, (char *)&sblock,
fsbtodb(&sblock, cgsblock(&sblock, cylno)),
SBLOCKSIZE);
}
if (rerun)
resolved = 0;
/*
* Check to see if the file system is mounted read-write.
*/
if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
resolved = 0;
ckfini(resolved);
for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
if (inostathead[cylno].il_stat != NULL)
free((char *)inostathead[cylno].il_stat);
free((char *)inostathead);
inostathead = NULL;
if (fsmodified && !preen)
printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
if (rerun)
printf("\n***** PLEASE RERUN FSCK *****\n");
if (mntp != NULL) {
/*
* We modified a mounted file system. Do a mount update on
* it unless it is read-write, so we can continue using it
* as safely as possible.
*/
if (mntp->f_flags & MNT_RDONLY) {
args.fspec = 0;
args.export.ex_flags = 0;
args.export.ex_root = 0;
ret = mount("ufs", mntp->f_mntonname,
mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args);
if (ret == 0)
return (0);
pwarn("mount reload of '%s' failed: %s\n\n",
mntp->f_mntonname, strerror(errno));
}
if (!fsmodified)
return (0);
if (!preen)
printf("\n***** REBOOT NOW *****\n");
sync();
return (4);
}
return (0);
}
/*
* Get the mount point information for name.
*/
static struct statfs *
getmntpt(const char *name)
{
struct stat devstat, mntdevstat;
char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
char *ddevname;
struct statfs *mntbuf, *statfsp;
int i, mntsize, isdev;
if (stat(name, &devstat) != 0)
return (NULL);
if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
isdev = 1;
else
isdev = 0;
mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
for (i = 0; i < mntsize; i++) {
statfsp = &mntbuf[i];
ddevname = statfsp->f_mntfromname;
if (*ddevname != '/') {
strcpy(device, _PATH_DEV);
strcat(device, ddevname);
strcpy(statfsp->f_mntfromname, device);
}
if (isdev == 0) {
if (strcmp(name, statfsp->f_mntonname))
continue;
return (statfsp);
}
if (stat(ddevname, &mntdevstat) == 0 &&
mntdevstat.st_rdev == devstat.st_rdev)
return (statfsp);
}
statfsp = NULL;
return (statfsp);
}
static void
usage(void)
{
(void) fprintf(stderr,
"usage: %s [-BFpfny] [-b block] [-c level] [-m mode] "
"file system ...\n",
getprogname());
exit(1);
}