main.c revision 66861 
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 66861 2000-10-09 08:26:35Z adrian $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/stat.h>
50#include <sys/time.h>
51#include <sys/mount.h>
52#include <sys/resource.h>
53
54#include <ufs/ufs/dinode.h>
55#include <ufs/ufs/ufsmount.h>
56#include <ufs/ffs/fs.h>
57
58#include <err.h>
59#include <errno.h>
60#include <fstab.h>
61#include <paths.h>
62
63#include "fsck.h"
64
65int returntosingle;
66
67static void usage __P((void));
68static int argtoi __P((int flag, char *req, char *str, int base));
69static int docheck __P((struct fstab *fsp));
70static int checkfilesys __P((char *filesys, char *mntpt, long auxdata,
71		int child));
72static struct statfs *getmntpt __P((const char *));
73int main __P((int argc, char *argv[]));
74
75int
76main(argc, argv)
77	int	argc;
78	char	*argv[];
79{
80	int ch;
81	struct rlimit rlimit;
82	int ret = 0;
83
84	sync();
85	skipclean = 1;
86	markclean = 1;
87	while ((ch = getopt(argc, argv, "b:c:dfm:npy")) != -1) {
88		switch (ch) {
89		case 'b':
90			skipclean = 0;
91			bflag = argtoi('b', "number", optarg, 10);
92			printf("Alternate super block location: %d\n", bflag);
93			break;
94
95		case 'c':
96			skipclean = 0;
97			cvtlevel = argtoi('c', "conversion level", optarg, 10);
98			break;
99
100		case 'd':
101			debug++;
102			break;
103
104		case 'f':
105			skipclean = 0;
106			break;
107
108		case 'm':
109			lfmode = argtoi('m', "mode", optarg, 8);
110			if (lfmode &~ 07777)
111				errx(EEXIT, "bad mode to -m: %o", lfmode);
112			printf("** lost+found creation mode %o\n", lfmode);
113			break;
114
115		case 'n':
116			nflag++;
117			yflag = 0;
118			break;
119
120		case 'p':
121			preen++;
122			break;
123
124		case 'y':
125			yflag++;
126			nflag = 0;
127			break;
128
129		default:
130			usage();
131		}
132	}
133	argc -= optind;
134	argv += optind;
135
136	if (!argc)
137		usage();
138
139	if (signal(SIGINT, SIG_IGN) != SIG_IGN)
140		(void)signal(SIGINT, catch);
141	if (preen)
142		(void)signal(SIGQUIT, catchquit);
143	/*
144	 * Push up our allowed memory limit so we can cope
145	 * with huge filesystems.
146	 */
147	if (getrlimit(RLIMIT_DATA, &rlimit) == 0) {
148		rlimit.rlim_cur = rlimit.rlim_max;
149		(void)setrlimit(RLIMIT_DATA, &rlimit);
150	}
151	while (argc-- > 0)
152		(void)checkfilesys(blockcheck(*argv++), 0, 0L, 0);
153
154	if (returntosingle)
155		ret = 2;
156	exit(ret);
157}
158
159static int
160argtoi(flag, req, str, base)
161	int flag;
162	char *req, *str;
163	int base;
164{
165	char *cp;
166	int ret;
167
168	ret = (int)strtol(str, &cp, base);
169	if (cp == str || *cp)
170		errx(EEXIT, "-%c flag requires a %s", flag, req);
171	return (ret);
172}
173
174/*
175 * Check the specified filesystem.
176 */
177/* ARGSUSED */
178static int
179checkfilesys(filesys, mntpt, auxdata, child)
180	char *filesys, *mntpt;
181	long auxdata;
182	int child;
183{
184	ufs_daddr_t n_ffree, n_bfree;
185	struct dups *dp;
186	struct statfs *mntbuf;
187	struct zlncnt *zlnp;
188	int cylno;
189
190	if (preen && child)
191		(void)signal(SIGQUIT, voidquit);
192	cdevname = filesys;
193	if (debug && preen)
194		pwarn("starting\n");
195	switch (setup(filesys)) {
196	case 0:
197		if (preen)
198			pfatal("CAN'T CHECK FILE SYSTEM.");
199		return (0);
200	case -1:
201		pwarn("clean, %ld free ", sblock.fs_cstotal.cs_nffree +
202		    sblock.fs_frag * sblock.fs_cstotal.cs_nbfree);
203		printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
204		    sblock.fs_cstotal.cs_nffree, sblock.fs_cstotal.cs_nbfree,
205		    sblock.fs_cstotal.cs_nffree * 100.0 / sblock.fs_dsize);
206		return (0);
207	}
208
209	/*
210	 * Get the mount point information of the filesystem, if
211	 * it is available.
212	 */
213	mntbuf = getmntpt(filesys);
214
215	/*
216	 * Cleared if any questions answered no. Used to decide if
217	 * the superblock should be marked clean.
218	 */
219	resolved = 1;
220	/*
221	 * 1: scan inodes tallying blocks used
222	 */
223	if (preen == 0) {
224		printf("** Last Mounted on %s\n", sblock.fs_fsmnt);
225		if (mntbuf != NULL && mntbuf->f_flags & MNT_ROOTFS)
226			printf("** Root file system\n");
227		printf("** Phase 1 - Check Blocks and Sizes\n");
228	}
229	pass1();
230
231	/*
232	 * 1b: locate first references to duplicates, if any
233	 */
234	if (duplist) {
235		if (preen || usedsoftdep)
236			pfatal("INTERNAL ERROR: dups with -p");
237		printf("** Phase 1b - Rescan For More DUPS\n");
238		pass1b();
239	}
240
241	/*
242	 * 2: traverse directories from root to mark all connected directories
243	 */
244	if (preen == 0)
245		printf("** Phase 2 - Check Pathnames\n");
246	pass2();
247
248	/*
249	 * 3: scan inodes looking for disconnected directories
250	 */
251	if (preen == 0)
252		printf("** Phase 3 - Check Connectivity\n");
253	pass3();
254
255	/*
256	 * 4: scan inodes looking for disconnected files; check reference counts
257	 */
258	if (preen == 0)
259		printf("** Phase 4 - Check Reference Counts\n");
260	pass4();
261
262	/*
263	 * 5: check and repair resource counts in cylinder groups
264	 */
265	if (preen == 0)
266		printf("** Phase 5 - Check Cyl groups\n");
267	pass5();
268
269	/*
270	 * print out summary statistics
271	 */
272	n_ffree = sblock.fs_cstotal.cs_nffree;
273	n_bfree = sblock.fs_cstotal.cs_nbfree;
274	pwarn("%ld files, %ld used, %ld free ",
275	    n_files, n_blks, n_ffree + sblock.fs_frag * n_bfree);
276	printf("(%d frags, %d blocks, %.1f%% fragmentation)\n",
277	    n_ffree, n_bfree, n_ffree * 100.0 / sblock.fs_dsize);
278	if (debug &&
279	    (n_files -= maxino - ROOTINO - sblock.fs_cstotal.cs_nifree))
280		printf("%d files missing\n", n_files);
281	if (debug) {
282		n_blks += sblock.fs_ncg *
283			(cgdmin(&sblock, 0) - cgsblock(&sblock, 0));
284		n_blks += cgsblock(&sblock, 0) - cgbase(&sblock, 0);
285		n_blks += howmany(sblock.fs_cssize, sblock.fs_fsize);
286		if (n_blks -= maxfsblock - (n_ffree + sblock.fs_frag * n_bfree))
287			printf("%d blocks missing\n", n_blks);
288		if (duplist != NULL) {
289			printf("The following duplicate blocks remain:");
290			for (dp = duplist; dp; dp = dp->next)
291				printf(" %d,", dp->dup);
292			printf("\n");
293		}
294		if (zlnhead != NULL) {
295			printf("The following zero link count inodes remain:");
296			for (zlnp = zlnhead; zlnp; zlnp = zlnp->next)
297				printf(" %u,", zlnp->zlncnt);
298			printf("\n");
299		}
300	}
301	zlnhead = (struct zlncnt *)0;
302	duplist = (struct dups *)0;
303	muldup = (struct dups *)0;
304	inocleanup();
305	if (fsmodified) {
306		sblock.fs_time = time(NULL);
307		sbdirty();
308	}
309	if (cvtlevel && sblk.b_dirty) {
310		/*
311		 * Write out the duplicate super blocks
312		 */
313		for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
314			bwrite(fswritefd, (char *)&sblock,
315			    fsbtodb(&sblock, cgsblock(&sblock, cylno)), SBSIZE);
316	}
317	if (rerun)
318		resolved = 0;
319
320	/*
321	 * Check to see if the filesystem is mounted read-write.
322	 */
323	if (mntbuf != NULL && (mntbuf->f_flags & MNT_RDONLY) == 0)
324		resolved = 0;
325	ckfini(resolved);
326
327	for (cylno = 0; cylno < sblock.fs_ncg; cylno++)
328		if (inostathead[cylno].il_stat != NULL)
329			free((char *)inostathead[cylno].il_stat);
330	free((char *)inostathead);
331	inostathead = NULL;
332	if (fsmodified && !preen)
333		printf("\n***** FILE SYSTEM WAS MODIFIED *****\n");
334	if (rerun)
335		printf("\n***** PLEASE RERUN FSCK *****\n");
336	if (mntbuf != NULL) {
337		struct ufs_args args;
338		int ret;
339		/*
340		 * We modified a mounted filesystem.  Do a mount update on
341		 * it unless it is read-write, so we can continue using it
342		 * as safely as possible.
343		 */
344		if (mntbuf->f_flags & MNT_RDONLY) {
345			args.fspec = 0;
346			args.export.ex_flags = 0;
347			args.export.ex_root = 0;
348			ret = mount("ufs", mntbuf->f_mntonname,
349			    mntbuf->f_flags | MNT_UPDATE | MNT_RELOAD, &args);
350			if (ret == 0)
351				return (0);
352			pwarn("mount reload of '%s' failed: %s\n\n",
353			    mntbuf->f_mntonname, strerror(errno));
354		}
355		if (!fsmodified)
356			return (0);
357		if (!preen)
358			printf("\n***** REBOOT NOW *****\n");
359		sync();
360		return (4);
361	}
362	return (0);
363}
364
365/*
366 * Get the directory that the device is mounted on.
367 */
368static struct statfs *
369getmntpt(name)
370	const char *name;
371{
372	struct stat devstat, mntdevstat;
373	char device[sizeof(_PATH_DEV) - 1 + MNAMELEN];
374	char *devname;
375	struct statfs *mntbuf;
376	int i, mntsize;
377
378	if (stat(name, &devstat) != 0 ||
379	    !(S_ISCHR(devstat.st_mode) || S_ISBLK(devstat.st_mode)))
380		return (NULL);
381	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
382	for (i = 0; i < mntsize; i++) {
383		if (strcmp(mntbuf[i].f_fstypename, "ufs") != 0)
384			continue;
385		devname = mntbuf[i].f_mntfromname;
386		if (*devname != '/') {
387			strcpy(device, _PATH_DEV);
388			strcat(device, devname);
389			devname = device;
390		}
391		if (stat(devname, &mntdevstat) == 0 &&
392		    mntdevstat.st_rdev == devstat.st_rdev)
393			return (&mntbuf[i]);
394	}
395	return (NULL);
396}
397
398static void
399usage()
400{
401        extern char *__progname;
402
403        (void) fprintf(stderr,
404            "Usage: %s [-dfnpy] [-B be|le] [-b block] [-c level] [-m mode] "
405                        "filesystem ...\n",
406            __progname);
407        exit(1);
408}
409