1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1986, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95";
43#endif
44static const char rcsid[] =
45 "$FreeBSD: head/sbin/fsck_ffs/main.c 86514 2001-11-17 23:48:21Z iedowse $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/stat.h>
50#include <sys/file.h>
51#include <sys/time.h>
52#include <sys/mount.h>
53#include <sys/resource.h>
54#include <sys/sysctl.h>
55
56#include <ufs/ufs/dinode.h>
57#include <ufs/ufs/ufsmount.h>
58#include <ufs/ffs/fs.h>
59
60#include <err.h>
61#include <errno.h>
62#include <fstab.h>
63#include <paths.h>
64#include <string.h>
65
66#include "fsck.h"
67
68static void usage __P((void));
69static int argtoi __P((int flag, char *req, char *str, int base));
70static int checkfilesys __P((char *filesys));
71static struct statfs *getmntpt __P((const char *));
72int main __P((int argc, char *argv[]));
73
74int
75main(argc, argv)
76 int argc;
77 char *argv[];
78{
79 int ch;
80 struct rlimit rlimit;
81 int ret = 0;
82
83 sync();
84 skipclean = 1;
85 while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) {
86 switch (ch) {
87 case 'b':
88 skipclean = 0;
89 bflag = argtoi('b', "number", optarg, 10);
90 printf("Alternate super block location: %d\n", bflag);
91 break;
92
93 case 'B':
94 bkgrdflag = 1;
95 break;
96
97 case 'c':
98 skipclean = 0;
99 cvtlevel = argtoi('c', "conversion level", optarg, 10);
100 break;
101
102 case 'd':
103 debug++;
104 break;
105
106 case 'f':
107 skipclean = 0;
108 break;
109
110 case 'F':
111 bkgrdcheck = 1;
112 break;
113
114 case 'm':
115 lfmode = argtoi('m', "mode", optarg, 8);
116 if (lfmode &~ 07777)
117 errx(EEXIT, "bad mode to -m: %o", lfmode);
118 printf("** lost+found creation mode %o\n", lfmode);
119 break;
120
121 case 'n':
122 nflag++;
123 yflag = 0;
124 break;
125
126 case 'p':
127 preen++;
128 break;
129
130 case 'y':
131 yflag++;
132 nflag = 0;
133 break;
134
135 default:
136 usage();
137 }
138 }
139 argc -= optind;
140 argv += optind;
141
142 if (!argc)
143 usage();
144
145 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
146 (void)signal(SIGINT, catch);
147 if (preen)
148 (void)signal(SIGQUIT, catchquit);
149 signal(SIGINFO, infohandler);
150 /*
151 * Push up our allowed memory limit so we can cope
152 * with huge filesystems.
153 */
154 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
155 rlimit.rlim_cur = rlimit.rlim_max;
156 (void)setrlimit(RLIMIT_DATA, &rlimit);
157 }
158 while (argc-- > 0)
159 (void)checkfilesys(*argv++);
160
161 if (returntosingle)
162 ret = 2;
163 exit(ret);
164}
165
166static int
167argtoi(flag, req, str, base)
168 int flag;
169 char *req, *str;
170 int base;
171{
172 char *cp;
173 int ret;
174
175 ret = (int)strtol(str, &cp, base);
176 if (cp == str || *cp)
177 errx(EEXIT, "-%c flag requires a %s", flag, req);
178 return (ret);
179}
180
181/*
182 * Check the specified filesystem.
183 */
184/* ARGSUSED */
185static int
186checkfilesys(filesys)
187 char *filesys;
188{
189 ufs_daddr_t n_ffree, n_bfree;
190 struct ufs_args args;
191 struct dups *dp;
192 struct statfs *mntp;
193 struct zlncnt *zlnp;
194 ufs_daddr_t blks;
195 ufs_daddr_t files;
196 int cylno, size;
197
198 cdevname = filesys;
199 if (debug && preen)
200 pwarn("starting\n");
201 /*
202 * Make best effort to get the disk name. Check first to see
203 * if it is listed among the mounted filesystems. Failing that
204 * check to see if it is listed in /etc/fstab.
205 */
206 mntp = getmntpt(filesys);
207 if (mntp != NULL)
208 filesys = mntp->f_mntfromname;
209 else
210 filesys = blockcheck(filesys);
211 /*
212 * If -F flag specified, check to see whether a background check
213 * is possible and needed. If possible and needed, exit with
214 * status zero. Otherwise exit with status non-zero. A non-zero
215 * exit status will cause a foreground check to be run.
216 */
217 sblock_init();
218 if (bkgrdcheck) {
219 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
220 exit(3); /* Cannot read superblock */
221 close(fsreadfd);
222 if (sblock.fs_flags & FS_NEEDSFSCK)
223 exit(4); /* Earlier background failed */
224 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
225 exit(5); /* Not running soft updates */
226 size = MIBSIZE;
227 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
228 exit(6); /* Lacks kernel support */
229 if ((mntp == NULL && sblock.fs_clean == 1) ||
230 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
231 exit(7); /* Filesystem clean, report it now */
232 exit(0);
233 }
234 /*
235 * If we are to do a background check:
236 * Get the mount point information of the filesystem
237 * create snapshot file
238 * return created snapshot file
239 * if not found, clear bkgrdflag and proceed with normal fsck
240 */
241 if (bkgrdflag) {
242 if (mntp == NULL) {
243 bkgrdflag = 0;
244 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
245 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
246 bkgrdflag = 0;
247 pfatal("NOT USING SOFT UPDATES, %s\n",
248 "CANNOT RUN IN BACKGROUND");
249 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
250 bkgrdflag = 0;
251 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
252 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
253 if (readsb(0) != 0) {
254 if (sblock.fs_flags & FS_NEEDSFSCK) {
255 bkgrdflag = 0;
256 pfatal("UNEXPECTED INCONSISTENCY, %s\n",
257 "CANNOT RUN IN BACKGROUND\n");
258 }
259 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
260 skipclean && preen) {
261 /*
262 * filesystem is clean;
263 * skip snapshot and report it clean
264 */
265 pwarn("FILESYSTEM CLEAN; %s\n",
266 "SKIPPING CHECKS");
267 goto clean;
268 }
269 }
270 close(fsreadfd);
271 }
272 if (bkgrdflag) {
273 snprintf(snapname, sizeof snapname, "%s/.fsck_snapshot",
274 mntp->f_mntonname);
275 args.fspec = snapname;
276 while (mount("ffs", mntp->f_mntonname,
277 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT,
278 &args) < 0) {
279 if (errno == EEXIST && unlink(snapname) == 0)
280 continue;
281 bkgrdflag = 0;
282 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n",
283 snapname, strerror(errno));
284 break;
285 }
286 if (bkgrdflag != 0)
287 filesys = snapname;
288 }
289 }
290
291 switch (setup(filesys)) {
292 case 0:
293 if (preen)
294 pfatal("CAN'T CHECK FILE SYSTEM.");
295 return (0);
296 case -1:
297 clean:
298 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
299 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
300 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
301 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree,
302 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
303 return (0);
304 }
305
306 /*
307 * Cleared if any questions answered no. Used to decide if
308 * the superblock should be marked clean.
309 */
310 resolved = 1;
311 /*
312 * 1: scan inodes tallying blocks used
313 */
314 if (preen == 0) {
315 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
316 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
317 printf("** Root file system\n");
318 printf("** Phase 1 - Check Blocks and Sizes\n");
319 }
320 pass1();
321
322 /*
323 * 1b: locate first references to duplicates, if any
324 */
325 if (duplist) {
326 if (preen || usedsoftdep)
327 pfatal("INTERNAL ERROR: dups with -p");
328 printf("** Phase 1b - Rescan For More DUPS\n");
329 pass1b();
330 }
331
332 /*
333 * 2: traverse directories from root to mark all connected directories
334 */
335 if (preen == 0)
336 printf("** Phase 2 - Check Pathnames\n");
337 pass2();
338
339 /*
340 * 3: scan inodes looking for disconnected directories
341 */
342 if (preen == 0)
343 printf("** Phase 3 - Check Connectivity\n");
344 pass3();
345
346 /*
347 * 4: scan inodes looking for disconnected files; check reference counts
348 */
349 if (preen == 0)
350 printf("** Phase 4 - Check Reference Counts\n");
351 pass4();
352
353 /*
354 * 5: check and repair resource counts in cylinder groups
355 */
356 if (preen == 0)
357 printf("** Phase 5 - Check Cyl groups\n");
358 pass5();
359
360 /*
361 * print out summary statistics
362 */
363 n_ffree = sblock.fs_cstotal.cs_nffree;
364 n_bfree = sblock.fs_cstotal.cs_nbfree;
365 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
366 blks = n_blks +
367 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
368 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
369 blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
370 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
371 if (bkgrdflag && (files > 0 || blks > 0)) {
372 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
373 pwarn("Reclaimed: %ld directories, %ld files, %d fragments\n",
374 countdirs, (long)files - countdirs, blks);
375 }
376 pwarn("%ld files, %ld used, %ld free ",
377 (long)n_files, (long)n_blks, (long)(n_ffree +
378 sblock.fs_frag * n_bfree));
379 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
380 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize);
381 if (debug) {
382 if (files < 0)
383 printf("%d inodes missing\n", -files);
384 if (blks < 0)
385 printf("%d blocks missing\n", -blks);
386 if (duplist != NULL) {
387 printf("The following duplicate blocks remain:");
388 for (dp = duplist; dp; dp = dp->next)
389 printf(" %d,", dp->dup);
390 printf("\n");
391 }
392 if (zlnhead != NULL) {
393 printf("The following zero link count inodes remain:");
394 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
395 printf(" %u,", zlnp->zlncnt);
396 printf("\n");
397 }
398 }
399 zlnhead = (struct zlncnt *)0;
400 duplist = (struct dups *)0;
401 muldup = (struct dups *)0;
402 inocleanup();
403 if (fsmodified) {
404 sblock.fs_time = time(NULL);
405 sbdirty();
406 }
407 if (cvtlevel && sblk.b_dirty) {
408 /*
409 * Write out the duplicate super blocks
410 */
411 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
412 bwrite(fswritefd, (char *)&sblock,
413 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
414 }
415 if (rerun)
416 resolved = 0;
417
418 /*
419 * Check to see if the filesystem is mounted read-write.
420 */
421 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
422 resolved = 0;
423 ckfini(resolved);
424
425 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
426 if (inostathead[cylno].il_stat != NULL)
427 free((char *)inostathead[cylno].il_stat);
428 free((char *)inostathead);
429 inostathead = NULL;
430 if (fsmodified && !preen)
431 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
432 if (rerun)
433 printf("\n***** PLEASE RERUN FSCK *****\n");
434 if (mntp != NULL) {
435 struct ufs_args args;
436 int ret;
437 /*
438 * We modified a mounted filesystem. Do a mount update on
439 * it unless it is read-write, so we can continue using it
440 * as safely as possible.
441 */
442 if (mntp->f_flags & MNT_RDONLY) {
443 args.fspec = 0;
444 args.export.ex_flags = 0;
445 args.export.ex_root = 0;
446 ret = mount("ufs", mntp->f_mntonname,
447 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args);
448 if (ret == 0)
449 return (0);
450 pwarn("mount reload of '%s' failed: %s\n\n",
451 mntp->f_mntonname, strerror(errno));
452 }
453 if (!fsmodified)
454 return (0);
455 if (!preen)
456 printf("\n***** REBOOT NOW *****\n");
457 sync();
458 return (4);
459 }
460 return (0);
461}
462
463/*
464 * Get the mount point information for name.
465 */
466static struct statfs *
467getmntpt(name)
468 const char *name;
469{
470 struct stat devstat, mntdevstat;
471 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
472 char *devname;
473 struct statfs *mntbuf, *statfsp;
474 int i, mntsize, isdev;
475
476 if (stat(name, &devstat) != 0)
477 return (NULL);
478 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
479 isdev = 1;
480 else
481 isdev = 0;
482 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
483 for (i = 0; i < mntsize; i++) {
484 statfsp = &mntbuf[i];
485 devname = statfsp->f_mntfromname;
486 if (*devname != '/') {
487 strcpy(device, _PATH_DEV);
488 strcat(device, devname);
489 strcpy(statfsp->f_mntfromname, device);
490 }
491 if (isdev == 0) {
492 if (strcmp(name, statfsp->f_mntonname))
493 continue;
494 return (statfsp);
495 }
496 if (stat(devname, &mntdevstat) == 0 &&
497 mntdevstat.st_rdev == devstat.st_rdev)
498 return (statfsp);
499 }
500 statfsp = NULL;
501 return (statfsp);
502}
503
504static void
505usage()
506{
507 extern char *__progname;
508
509 (void) fprintf(stderr,
510 "Usage: %s [-BFpfny] [-b block] [-c level] [-m mode] "
511 "filesystem ...\n",
512 __progname);
513 exit(1);
514}
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1986, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/14/95";
43#endif
44static const char rcsid[] =
45 "$FreeBSD: head/sbin/fsck_ffs/main.c 86514 2001-11-17 23:48:21Z iedowse $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/stat.h>
50#include <sys/file.h>
51#include <sys/time.h>
52#include <sys/mount.h>
53#include <sys/resource.h>
54#include <sys/sysctl.h>
55
56#include <ufs/ufs/dinode.h>
57#include <ufs/ufs/ufsmount.h>
58#include <ufs/ffs/fs.h>
59
60#include <err.h>
61#include <errno.h>
62#include <fstab.h>
63#include <paths.h>
64#include <string.h>
65
66#include "fsck.h"
67
68static void usage __P((void));
69static int argtoi __P((int flag, char *req, char *str, int base));
70static int checkfilesys __P((char *filesys));
71static struct statfs *getmntpt __P((const char *));
72int main __P((int argc, char *argv[]));
73
74int
75main(argc, argv)
76 int argc;
77 char *argv[];
78{
79 int ch;
80 struct rlimit rlimit;
81 int ret = 0;
82
83 sync();
84 skipclean = 1;
85 while ((ch = getopt(argc, argv, "b:Bc:dfFm:npy")) != -1) {
86 switch (ch) {
87 case 'b':
88 skipclean = 0;
89 bflag = argtoi('b', "number", optarg, 10);
90 printf("Alternate super block location: %d\n", bflag);
91 break;
92
93 case 'B':
94 bkgrdflag = 1;
95 break;
96
97 case 'c':
98 skipclean = 0;
99 cvtlevel = argtoi('c', "conversion level", optarg, 10);
100 break;
101
102 case 'd':
103 debug++;
104 break;
105
106 case 'f':
107 skipclean = 0;
108 break;
109
110 case 'F':
111 bkgrdcheck = 1;
112 break;
113
114 case 'm':
115 lfmode = argtoi('m', "mode", optarg, 8);
116 if (lfmode &~ 07777)
117 errx(EEXIT, "bad mode to -m: %o", lfmode);
118 printf("** lost+found creation mode %o\n", lfmode);
119 break;
120
121 case 'n':
122 nflag++;
123 yflag = 0;
124 break;
125
126 case 'p':
127 preen++;
128 break;
129
130 case 'y':
131 yflag++;
132 nflag = 0;
133 break;
134
135 default:
136 usage();
137 }
138 }
139 argc -= optind;
140 argv += optind;
141
142 if (!argc)
143 usage();
144
145 if (signal(SIGINT, SIG_IGN) != SIG_IGN)
146 (void)signal(SIGINT, catch);
147 if (preen)
148 (void)signal(SIGQUIT, catchquit);
149 signal(SIGINFO, infohandler);
150 /*
151 * Push up our allowed memory limit so we can cope
152 * with huge filesystems.
153 */
154 if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
155 rlimit.rlim_cur = rlimit.rlim_max;
156 (void)setrlimit(RLIMIT_DATA, &rlimit);
157 }
158 while (argc-- > 0)
159 (void)checkfilesys(*argv++);
160
161 if (returntosingle)
162 ret = 2;
163 exit(ret);
164}
165
166static int
167argtoi(flag, req, str, base)
168 int flag;
169 char *req, *str;
170 int base;
171{
172 char *cp;
173 int ret;
174
175 ret = (int)strtol(str, &cp, base);
176 if (cp == str || *cp)
177 errx(EEXIT, "-%c flag requires a %s", flag, req);
178 return (ret);
179}
180
181/*
182 * Check the specified filesystem.
183 */
184/* ARGSUSED */
185static int
186checkfilesys(filesys)
187 char *filesys;
188{
189 ufs_daddr_t n_ffree, n_bfree;
190 struct ufs_args args;
191 struct dups *dp;
192 struct statfs *mntp;
193 struct zlncnt *zlnp;
194 ufs_daddr_t blks;
195 ufs_daddr_t files;
196 int cylno, size;
197
198 cdevname = filesys;
199 if (debug && preen)
200 pwarn("starting\n");
201 /*
202 * Make best effort to get the disk name. Check first to see
203 * if it is listed among the mounted filesystems. Failing that
204 * check to see if it is listed in /etc/fstab.
205 */
206 mntp = getmntpt(filesys);
207 if (mntp != NULL)
208 filesys = mntp->f_mntfromname;
209 else
210 filesys = blockcheck(filesys);
211 /*
212 * If -F flag specified, check to see whether a background check
213 * is possible and needed. If possible and needed, exit with
214 * status zero. Otherwise exit with status non-zero. A non-zero
215 * exit status will cause a foreground check to be run.
216 */
217 sblock_init();
218 if (bkgrdcheck) {
219 if ((fsreadfd = open(filesys, O_RDONLY)) < 0 || readsb(0) == 0)
220 exit(3); /* Cannot read superblock */
221 close(fsreadfd);
222 if (sblock.fs_flags & FS_NEEDSFSCK)
223 exit(4); /* Earlier background failed */
224 if ((sblock.fs_flags & FS_DOSOFTDEP) == 0)
225 exit(5); /* Not running soft updates */
226 size = MIBSIZE;
227 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0)
228 exit(6); /* Lacks kernel support */
229 if ((mntp == NULL && sblock.fs_clean == 1) ||
230 (mntp != NULL && (sblock.fs_flags & FS_UNCLEAN) == 0))
231 exit(7); /* Filesystem clean, report it now */
232 exit(0);
233 }
234 /*
235 * If we are to do a background check:
236 * Get the mount point information of the filesystem
237 * create snapshot file
238 * return created snapshot file
239 * if not found, clear bkgrdflag and proceed with normal fsck
240 */
241 if (bkgrdflag) {
242 if (mntp == NULL) {
243 bkgrdflag = 0;
244 pfatal("NOT MOUNTED, CANNOT RUN IN BACKGROUND\n");
245 } else if ((mntp->f_flags & MNT_SOFTDEP) == 0) {
246 bkgrdflag = 0;
247 pfatal("NOT USING SOFT UPDATES, %s\n",
248 "CANNOT RUN IN BACKGROUND");
249 } else if ((mntp->f_flags & MNT_RDONLY) != 0) {
250 bkgrdflag = 0;
251 pfatal("MOUNTED READ-ONLY, CANNOT RUN IN BACKGROUND\n");
252 } else if ((fsreadfd = open(filesys, O_RDONLY)) >= 0) {
253 if (readsb(0) != 0) {
254 if (sblock.fs_flags & FS_NEEDSFSCK) {
255 bkgrdflag = 0;
256 pfatal("UNEXPECTED INCONSISTENCY, %s\n",
257 "CANNOT RUN IN BACKGROUND\n");
258 }
259 if ((sblock.fs_flags & FS_UNCLEAN) == 0 &&
260 skipclean && preen) {
261 /*
262 * filesystem is clean;
263 * skip snapshot and report it clean
264 */
265 pwarn("FILESYSTEM CLEAN; %s\n",
266 "SKIPPING CHECKS");
267 goto clean;
268 }
269 }
270 close(fsreadfd);
271 }
272 if (bkgrdflag) {
273 snprintf(snapname, sizeof snapname, "%s/.fsck_snapshot",
274 mntp->f_mntonname);
275 args.fspec = snapname;
276 while (mount("ffs", mntp->f_mntonname,
277 mntp->f_flags | MNT_UPDATE | MNT_SNAPSHOT,
278 &args) < 0) {
279 if (errno == EEXIST && unlink(snapname) == 0)
280 continue;
281 bkgrdflag = 0;
282 pfatal("CANNOT CREATE SNAPSHOT %s: %s\n",
283 snapname, strerror(errno));
284 break;
285 }
286 if (bkgrdflag != 0)
287 filesys = snapname;
288 }
289 }
290
291 switch (setup(filesys)) {
292 case 0:
293 if (preen)
294 pfatal("CAN'T CHECK FILE SYSTEM.");
295 return (0);
296 case -1:
297 clean:
298 pwarn("clean, %ld free ", (long)(sblock.fs_cstotal.cs_nffree +
299 sblock.fs_frag * sblock.fs_cstotal.cs_nbfree));
300 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
301 sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree,
302 sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
303 return (0);
304 }
305
306 /*
307 * Cleared if any questions answered no. Used to decide if
308 * the superblock should be marked clean.
309 */
310 resolved = 1;
311 /*
312 * 1: scan inodes tallying blocks used
313 */
314 if (preen == 0) {
315 printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
316 if (mntp != NULL && mntp->f_flags & MNT_ROOTFS)
317 printf("** Root file system\n");
318 printf("** Phase 1 - Check Blocks and Sizes\n");
319 }
320 pass1();
321
322 /*
323 * 1b: locate first references to duplicates, if any
324 */
325 if (duplist) {
326 if (preen || usedsoftdep)
327 pfatal("INTERNAL ERROR: dups with -p");
328 printf("** Phase 1b - Rescan For More DUPS\n");
329 pass1b();
330 }
331
332 /*
333 * 2: traverse directories from root to mark all connected directories
334 */
335 if (preen == 0)
336 printf("** Phase 2 - Check Pathnames\n");
337 pass2();
338
339 /*
340 * 3: scan inodes looking for disconnected directories
341 */
342 if (preen == 0)
343 printf("** Phase 3 - Check Connectivity\n");
344 pass3();
345
346 /*
347 * 4: scan inodes looking for disconnected files; check reference counts
348 */
349 if (preen == 0)
350 printf("** Phase 4 - Check Reference Counts\n");
351 pass4();
352
353 /*
354 * 5: check and repair resource counts in cylinder groups
355 */
356 if (preen == 0)
357 printf("** Phase 5 - Check Cyl groups\n");
358 pass5();
359
360 /*
361 * print out summary statistics
362 */
363 n_ffree = sblock.fs_cstotal.cs_nffree;
364 n_bfree = sblock.fs_cstotal.cs_nbfree;
365 files = maxino - ROOTINO - sblock.fs_cstotal.cs_nifree - n_files;
366 blks = n_blks +
367 sblock.fs_ncg * (cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
368 blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
369 blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
370 blks = maxfsblock - (n_ffree + sblock.fs_frag * n_bfree) - blks;
371 if (bkgrdflag && (files > 0 || blks > 0)) {
372 countdirs = sblock.fs_cstotal.cs_ndir - countdirs;
373 pwarn("Reclaimed: %ld directories, %ld files, %d fragments\n",
374 countdirs, (long)files - countdirs, blks);
375 }
376 pwarn("%ld files, %ld used, %ld free ",
377 (long)n_files, (long)n_blks, (long)(n_ffree +
378 sblock.fs_frag * n_bfree));
379 printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
380 n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize);
381 if (debug) {
382 if (files < 0)
383 printf("%d inodes missing\n", -files);
384 if (blks < 0)
385 printf("%d blocks missing\n", -blks);
386 if (duplist != NULL) {
387 printf("The following duplicate blocks remain:");
388 for (dp = duplist; dp; dp = dp->next)
389 printf(" %d,", dp->dup);
390 printf("\n");
391 }
392 if (zlnhead != NULL) {
393 printf("The following zero link count inodes remain:");
394 for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
395 printf(" %u,", zlnp->zlncnt);
396 printf("\n");
397 }
398 }
399 zlnhead = (struct zlncnt *)0;
400 duplist = (struct dups *)0;
401 muldup = (struct dups *)0;
402 inocleanup();
403 if (fsmodified) {
404 sblock.fs_time = time(NULL);
405 sbdirty();
406 }
407 if (cvtlevel && sblk.b_dirty) {
408 /*
409 * Write out the duplicate super blocks
410 */
411 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
412 bwrite(fswritefd, (char *)&sblock,
413 fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
414 }
415 if (rerun)
416 resolved = 0;
417
418 /*
419 * Check to see if the filesystem is mounted read-write.
420 */
421 if (bkgrdflag == 0 && mntp != NULL && (mntp->f_flags & MNT_RDONLY) == 0)
422 resolved = 0;
423 ckfini(resolved);
424
425 for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
426 if (inostathead[cylno].il_stat != NULL)
427 free((char *)inostathead[cylno].il_stat);
428 free((char *)inostathead);
429 inostathead = NULL;
430 if (fsmodified && !preen)
431 printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
432 if (rerun)
433 printf("\n***** PLEASE RERUN FSCK *****\n");
434 if (mntp != NULL) {
435 struct ufs_args args;
436 int ret;
437 /*
438 * We modified a mounted filesystem. Do a mount update on
439 * it unless it is read-write, so we can continue using it
440 * as safely as possible.
441 */
442 if (mntp->f_flags & MNT_RDONLY) {
443 args.fspec = 0;
444 args.export.ex_flags = 0;
445 args.export.ex_root = 0;
446 ret = mount("ufs", mntp->f_mntonname,
447 mntp->f_flags | MNT_UPDATE | MNT_RELOAD, &args);
448 if (ret == 0)
449 return (0);
450 pwarn("mount reload of '%s' failed: %s\n\n",
451 mntp->f_mntonname, strerror(errno));
452 }
453 if (!fsmodified)
454 return (0);
455 if (!preen)
456 printf("\n***** REBOOT NOW *****\n");
457 sync();
458 return (4);
459 }
460 return (0);
461}
462
463/*
464 * Get the mount point information for name.
465 */
466static struct statfs *
467getmntpt(name)
468 const char *name;
469{
470 struct stat devstat, mntdevstat;
471 char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
472 char *devname;
473 struct statfs *mntbuf, *statfsp;
474 int i, mntsize, isdev;
475
476 if (stat(name, &devstat) != 0)
477 return (NULL);
478 if (S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode))
479 isdev = 1;
480 else
481 isdev = 0;
482 mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
483 for (i = 0; i < mntsize; i++) {
484 statfsp = &mntbuf[i];
485 devname = statfsp->f_mntfromname;
486 if (*devname != '/') {
487 strcpy(device, _PATH_DEV);
488 strcat(device, devname);
489 strcpy(statfsp->f_mntfromname, device);
490 }
491 if (isdev == 0) {
492 if (strcmp(name, statfsp->f_mntonname))
493 continue;
494 return (statfsp);
495 }
496 if (stat(devname, &mntdevstat) == 0 &&
497 mntdevstat.st_rdev == devstat.st_rdev)
498 return (statfsp);
499 }
500 statfsp = NULL;
501 return (statfsp);
502}
503
504static void
505usage()
506{
507 extern char *__progname;
508
509 (void) fprintf(stderr,
510 "Usage: %s [-BFpfny] [-b block] [-c level] [-m mode] "
511 "filesystem ...\n",
512 __progname);
513 exit(1);
514}