main.c revision 1.72 
1/*	$NetBSD: main.c,v 1.72 2008/10/09 18:38:24 wiz Exp $	*/
2
3/*
4 * Copyright (c) 1980, 1986, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
18 *
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
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1980, 1986, 1993\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)main.c	8.6 (Berkeley) 5/14/95";
41#else
42__RCSID("$NetBSD: main.c,v 1.72 2008/10/09 18:38:24 wiz Exp $");
43#endif
44#endif /* not lint */
45
46#include <sys/param.h>
47#include <sys/time.h>
48#include <sys/mount.h>
49#include <sys/resource.h>
50
51#include <ufs/ufs/dinode.h>
52#include <ufs/ufs/ufsmount.h>
53#include <ufs/ffs/fs.h>
54#include <ufs/ffs/ffs_extern.h>
55
56#include <ctype.h>
57#include <err.h>
58#include <errno.h>
59#include <fstab.h>
60#include <string.h>
61#include <time.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <unistd.h>
65#include <signal.h>
66
67#include "fsck.h"
68#include "extern.h"
69#include "fsutil.h"
70#include "exitvalues.h"
71#include "snapshot.h"
72
73int	progress = 0;
74int	returntosingle = 0;
75
76static int	argtoi(int, const char *, const char *, int);
77static int	checkfilesys(const char *, const char *, int);
78static void	usage(void);
79static char 	*get_snap_device(char *);
80
81int
82main(int argc, char *argv[])
83{
84	struct rlimit r;
85	int ch;
86	int ret = FSCK_EXIT_OK;
87	char *snap_backup = NULL;
88	int snap_internal = 0;
89
90	if (getrlimit(RLIMIT_DATA, &r) == 0) {
91		r.rlim_cur = r.rlim_max;
92		(void) setrlimit(RLIMIT_DATA, &r);
93	}
94	sync();
95	skipclean = 1;
96	markclean = 1;
97	forceimage = 0;
98	endian = 0;
99	isappleufs = 0;
100	while ((ch = getopt(argc, argv, "aB:b:c:dFfm:npPqUyx:X")) != -1) {
101		switch (ch) {
102		case 'a':
103			isappleufs = 1;
104			break;
105
106		case 'B':
107			if (strcmp(optarg, "be") == 0)
108				endian = BIG_ENDIAN;
109			else if (strcmp(optarg, "le") == 0)
110				endian = LITTLE_ENDIAN;
111			else usage();
112			break;
113
114		case 'b':
115			skipclean = 0;
116			bflag = argtoi('b', "number", optarg, 10);
117			printf("Alternate super block location: %d\n", bflag);
118			break;
119
120		case 'c':
121			skipclean = 0;
122			cvtlevel = argtoi('c', "conversion level", optarg, 10);
123			if (cvtlevel > 4) {
124				cvtlevel = 4;
125				warnx("Using maximum conversion level of %d\n",
126				    cvtlevel);
127			}
128			break;
129
130		case 'd':
131			debug++;
132			break;
133
134		case 'F':
135			forceimage = 1;
136			break;
137
138		case 'f':
139			skipclean = 0;
140			break;
141
142		case 'm':
143			lfmode = argtoi('m', "mode", optarg, 8);
144			if (lfmode &~ 07777)
145				errx(FSCK_EXIT_USAGE, "bad mode to -m: %o",
146				    lfmode);
147			printf("** lost+found creation mode %o\n", lfmode);
148			break;
149
150		case 'n':
151			nflag++;
152			yflag = 0;
153			break;
154
155		case 'p':
156			preen++;
157			break;
158
159		case 'P':
160			progress = 1;
161			break;
162
163		case 'q':
164			quiet++;
165			break;
166#ifndef SMALL
167		case 'U':
168			Uflag++;
169			break;
170#endif
171
172		case 'y':
173			yflag++;
174			nflag = 0;
175			break;
176		case 'x':
177			snap_backup = optarg;
178			break;
179		case 'X':
180			snap_internal = 1;
181			break;
182
183		default:
184			usage();
185		}
186	}
187
188	if (snap_backup || snap_internal) {
189		if (!nflag || yflag) {
190			warnx("Cannot use -x or -X without -n\n");
191			snap_backup = NULL;
192			snap_internal = 0;
193		}
194	}
195
196
197	argc -= optind;
198	argv += optind;
199
200	if (!argc)
201		usage();
202
203	if (debug)
204		progress = 0;
205
206	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
207		(void)signal(SIGINT, catch);
208	if (preen)
209		(void)signal(SIGQUIT, catchquit);
210#ifdef PROGRESS
211	if (progress) {
212		progress_ttywidth(0);
213		(void)signal(SIGWINCH, progress_ttywidth);
214	}
215#endif /* ! PROGRESS */
216	signal(SIGINFO, infohandler);
217
218	while (argc-- > 0) {
219		int nret;
220		char *path = strdup(blockcheck(*argv));
221
222		if (path == NULL)
223			pfatal("Can't check %s\n", *argv);
224
225		if (snap_backup || snap_internal) {
226			char *mpt;
227			char *snap_dev;
228			int snapfd;
229
230			mpt = get_snap_device(*argv);
231			if (mpt == NULL)
232				goto next;
233			snapfd = snap_open(mpt, snap_backup, NULL, &snap_dev);
234			if (snapfd < 0) {
235				warn("can't take snapshot of %s", mpt);
236				free(mpt);
237				goto next;
238			}
239			nret = checkfilesys(blockcheck(snap_dev), path, 0);
240			if (ret < nret)
241				ret = nret;
242			free(mpt);
243			close(snapfd);
244		} else {
245			nret = checkfilesys(path, path, 0);
246			if (ret < nret)
247				ret = nret;
248		}
249next:
250		free(path);
251		argv++;
252	}
253
254	return returntosingle ? FSCK_EXIT_UNRESOLVED : ret;
255}
256
257static int
258argtoi(int flag, const char *req, const char *str, int base)
259{
260	char *cp;
261	int ret;
262
263	ret = (int)strtol(str, &cp, base);
264	if (cp == str || *cp)
265		errx(FSCK_EXIT_USAGE, "-%c flag requires a %s",
266		    flag, req);
267	return (ret);
268}
269
270/*
271 * Check the specified filesystem.
272 */
273/* ARGSUSED */
274static int
275checkfilesys(const char *filesys, const char *origfs, int child)
276{
277	daddr_t n_ffree, n_bfree;
278	struct dups *dp;
279	struct zlncnt *zlnp;
280	int cylno;
281#ifdef LITE2BORKEN
282	int flags;
283#endif
284#ifdef PROGRESS
285	/*
286	 * In prune mode, how far does the progress bar travel during
287	 * each pass?  (In non-prune mode, each pass has a separate
288	 * progress bar that travels from 0 to 100%.)
289	 *
290	 * The numbers below are percentages, intended to correspond
291	 * roughly to the cumulative time up to the end of each pass.
292	 * They don't have to be accurate.  In reality, on a large
293	 * file system, Pass 1 and Pass 2 together are likely to use
294	 * significantly more than the 95% reflected below, so users
295	 * will get a pleasant surprise when the last 5% of the progress
296	 * bar runs more quickly than they had expected.
297	 */
298	static int progress_limits[] = {0, 20, 95, 96, 97, 100};
299#endif /* PROGRESS */
300
301	if (preen && child)
302		(void)signal(SIGQUIT, voidquit);
303	setcdevname(filesys, preen);
304	if (debug && preen)
305		pwarn("starting\n");
306	switch (setup(filesys, origfs)) {
307	case 0:
308		if (preen)
309			pfatal("CAN'T CHECK FILE SYSTEM.");
310		/* fall through */
311	case -1:
312		return FSCK_EXIT_OK;
313	}
314	/*
315	 * Cleared if any questions answered no. Used to decide if
316	 * the superblock should be marked clean.
317	 */
318	resolved = 1;
319
320#ifdef PROGRESS
321	progress_switch(progress);
322	progress_init();
323#endif /* PROGRESS */
324
325	/*
326	 * 1: scan inodes tallying blocks used
327	 */
328	if (preen == 0) {
329		pwarn("** Last Mounted on %s\n", sblock->fs_fsmnt);
330		if (hotroot())
331			pwarn("** Root file system\n");
332		pwarn("** Phase 1 - Check Blocks and Sizes\n");
333	}
334#ifdef PROGRESS
335	if (preen)
336		progress_setrange(0, progress_limits[1]);
337#endif /* PROGRESS */
338	pass1();
339
340	/*
341	 * 1b: locate first references to duplicates, if any
342	 */
343	if (duplist) {
344		if (preen)
345			pfatal("INTERNAL ERROR: dups with -p\n");
346		if (usedsoftdep)
347			pfatal("INTERNAL ERROR: dups with softdep\n");
348		pwarn("** Phase 1b - Rescan For More DUPS\n");
349		pass1b();
350	}
351
352	/*
353	 * 2: traverse directories from root to mark all connected directories
354	 */
355	if (preen == 0)
356		pwarn("** Phase 2 - Check Pathnames\n");
357#ifdef PROGRESS
358	if (preen)
359		progress_sethighlim(progress_limits[2]);
360#endif /* PROGRESS */
361	pass2();
362
363	/*
364	 * 3: scan inodes looking for disconnected directories
365	 */
366	if (preen == 0)
367		pwarn("** Phase 3 - Check Connectivity\n");
368#ifdef PROGRESS
369	if (preen)
370		progress_sethighlim(progress_limits[3]);
371#endif /* PROGRESS */
372	pass3();
373
374	/*
375	 * 4: scan inodes looking for disconnected files; check reference counts
376	 */
377	if (preen == 0)
378		pwarn("** Phase 4 - Check Reference Counts\n");
379#ifdef PROGRESS
380	if (preen)
381		progress_sethighlim(progress_limits[4]);
382#endif /* PROGRESS */
383	pass4();
384
385	/*
386	 * 5: check and repair resource counts in cylinder groups
387	 */
388	if (preen == 0)
389		pwarn("** Phase 5 - Check Cyl groups\n");
390#ifdef PROGRESS
391	if (preen)
392		progress_sethighlim(progress_limits[5]);
393#endif /* PROGRESS */
394	pass5();
395
396	/*
397	 * print out summary statistics
398	 */
399	n_ffree = sblock->fs_cstotal.cs_nffree;
400	n_bfree = sblock->fs_cstotal.cs_nbfree;
401	pwarn("%llu files, %lld used, %lld free ",
402	    (unsigned long long)n_files, (long long)n_blks,
403	    (long long)(n_ffree + sblock->fs_frag * n_bfree));
404	printf("(%lld frags, %lld blocks, %lld.%lld%% fragmentation)\n",
405	    (long long)n_ffree, (long long)n_bfree,
406	    (long long)(n_ffree * 100 / (daddr_t)sblock->fs_dsize),
407	    (long long)(((n_ffree * 1000 + (daddr_t)sblock->fs_dsize / 2)
408		/ (daddr_t)sblock->fs_dsize) % 10));
409	if (debug &&
410	    (n_files -= maxino - ROOTINO - sblock->fs_cstotal.cs_nifree))
411		printf("%llu files missing\n", (unsigned long long)n_files);
412	if (debug) {
413		n_blks += sblock->fs_ncg *
414			(cgdmin(sblock, 0) - cgsblock(sblock, 0));
415		n_blks += cgsblock(sblock, 0) - cgbase(sblock, 0);
416		n_blks += howmany(sblock->fs_cssize, sblock->fs_fsize);
417		if (n_blks -= maxfsblock - (n_ffree + sblock->fs_frag * n_bfree))
418			printf("%lld blocks missing\n", (long long)n_blks);
419		if (duplist != NULL) {
420			printf("The following duplicate blocks remain:");
421			for (dp = duplist; dp; dp = dp->next)
422				printf(" %lld,", (long long)dp->dup);
423			printf("\n");
424		}
425		if (zlnhead != NULL) {
426			printf("The following zero link count inodes remain:");
427			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
428				printf(" %llu,",
429				    (unsigned long long)zlnp->zlncnt);
430			printf("\n");
431		}
432	}
433	zlnhead = (struct zlncnt *)0;
434	duplist = (struct dups *)0;
435	muldup = (struct dups *)0;
436	inocleanup();
437	if (fsmodified) {
438		sblock->fs_time = time(NULL);
439		sbdirty();
440	}
441	if (rerun)
442		markclean = 0;
443#if LITE2BORKEN
444	if (!hotroot()) {
445		ckfini();
446	} else {
447		struct statvfs stfs_buf;
448		/*
449		 * Check to see if root is mounted read-write.
450		 */
451		if (statvfs("/", &stfs_buf) == 0)
452			flags = stfs_buf.f_flag;
453		else
454			flags = 0;
455		if (markclean)
456			markclean = flags & MNT_RDONLY;
457		ckfini();
458	}
459#else
460	ckfini();
461#endif
462	for (cylno = 0; cylno < sblock->fs_ncg; cylno++)
463		if (inostathead[cylno].il_stat != NULL)
464			free(inostathead[cylno].il_stat);
465	free(inostathead);
466	inostathead = NULL;
467
468	if (!resolved || rerun) {
469		pwarn("\n***** UNRESOLVED INCONSISTENCIES REMAIN *****\n");
470		returntosingle = 1;
471	}
472	if (!fsmodified)
473		return FSCK_EXIT_OK;
474	if (!preen)
475		pwarn("\n***** FILE SYSTEM WAS MODIFIED *****\n");
476	if (rerun)
477		pwarn("\n***** PLEASE RERUN FSCK *****\n");
478	if (hotroot()) {
479		struct statvfs stfs_buf;
480		/*
481		 * We modified the root.  Do a mount update on
482		 * it, unless it is read-write, so we can continue.
483		 */
484		if (statvfs("/", &stfs_buf) == 0) {
485			long flags = stfs_buf.f_flag;
486			struct ufs_args args;
487
488			if (flags & MNT_RDONLY) {
489				args.fspec = 0;
490				flags |= MNT_UPDATE | MNT_RELOAD;
491				if (mount(MOUNT_FFS, "/", flags,
492				    &args, sizeof args) == 0)
493					return FSCK_EXIT_OK;
494			}
495		}
496		if (!preen)
497			pwarn("\n***** REBOOT NOW *****\n");
498		sync();
499		return FSCK_EXIT_ROOT_CHANGED;
500	}
501	return FSCK_EXIT_OK;
502}
503
504static void
505usage(void)
506{
507
508	(void) fprintf(stderr,
509	    "usage: %s [���adFfPpqUX] [���B byteorder] [���b block] [���c level] "
510	    "[���m mode]\n"
511	    "\t[-x snap���backup] [���y | ���n] filesystem ...\n",
512	    getprogname());
513	exit(FSCK_EXIT_USAGE);
514}
515
516static
517char *get_snap_device(char *file)
518{
519	char *mountpoint = NULL;
520	struct statvfs *mntbuf, *fs, fsbuf;
521	struct stat sb;
522
523	/* find the mount point */
524	if (lstat(file, &sb) == -1) {
525		warn("can't stat %s", file);
526		return NULL;
527	}
528	if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
529		int mntbufc, i;
530		if ((mntbufc = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
531			pfatal("can't get mount list: %s\n", strerror(errno));
532		for (fs = mntbuf, i = 0;
533		     i < mntbufc; i++, fs++) {
534			if (strcmp(fs->f_fstypename, "ufs") != 0 &&
535			    strcmp(fs->f_fstypename, "ffs") != 0)
536				continue;
537			if (fs->f_flag & ST_RDONLY) {
538				warnx("Cannot use -x or -X "
539				     "on read-only filesystem");
540				free(mntbuf);
541				return NULL;
542			}
543			if (strcmp(fs->f_mntfromname, unrawname(file)) == 0) {
544				mountpoint = strdup(fs->f_mntonname);
545				free(mntbuf);
546				return mountpoint;
547			}
548		}
549		warnx("Cannot use -x or -X on unmounted device");
550		free(mntbuf);
551		return NULL;
552	}
553	if (S_ISDIR(sb.st_mode)) {
554		if (statvfs(file, &fsbuf) == -1)
555			pfatal("can't statvfs %s: %s\n", file, strerror(errno));
556		if (strcmp(fsbuf.f_mntonname, file))
557			pfatal("%s is not a mount point\n", file);
558		if (fsbuf.f_flag & ST_RDONLY) {
559			warnx("Cannot use -x or -X "
560			     "on read-only filesystem");
561			return NULL;
562		}
563		mountpoint = strdup(file);
564		return mountpoint;
565	}
566	pfatal("%s is not a mount point\n", file);
567	return NULL;
568}
569