preen.c revision 70415 
1/*	$NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $	*/
2
3/*
4 * Copyright (c) 1990, 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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $FreeBSD: head/sbin/fsck/preen.c 70415 2000-12-27 22:28:40Z phk $
36 */
37
38#include <sys/cdefs.h>
39#ifndef lint
40#if 0
41static char sccsid[] = "@(#)preen.c	8.5 (Berkeley) 4/28/95";
42#else
43__RCSID("$NetBSD: preen.c,v 1.18 1998/07/26 20:02:36 mycroft Exp $");
44#endif
45#endif /* not lint */
46
47#include <sys/param.h>
48#include <sys/stat.h>
49#include <sys/wait.h>
50#include <sys/queue.h>
51
52#include <err.h>
53#include <ctype.h>
54#include <fstab.h>
55#include <string.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <unistd.h>
59
60#include "fsutil.h"
61
62struct partentry {
63	TAILQ_ENTRY(partentry)	 p_entries;
64	char		  	*p_devname;	/* device name */
65	char			*p_mntpt;	/* mount point */
66	char		  	*p_type;	/* filesystem type */
67	void			*p_auxarg;	/* auxiliary argument */
68};
69
70TAILQ_HEAD(part, partentry) badh;
71
72struct diskentry {
73	TAILQ_ENTRY(diskentry) 	    d_entries;
74	char		       	   *d_name;	/* disk base name */
75	TAILQ_HEAD(prt, partentry)  d_part;	/* list of partitions on disk */
76	int			    d_pid;	/* 0 or pid of fsck proc */
77};
78
79TAILQ_HEAD(disk, diskentry) diskh;
80
81static int nrun = 0, ndisks = 0;
82
83static struct diskentry *finddisk __P((const char *));
84static void addpart __P((const char *, const char *, const char *, void *));
85static int startdisk __P((struct diskentry *,
86    int (*)(const char *, const char *, const char *, void *, pid_t *)));
87static void printpart __P((void));
88
89int
90checkfstab(flags, maxrun, docheck, checkit)
91	int flags, maxrun;
92	void *(*docheck) __P((struct fstab *));
93	int (*checkit) __P((const char *, const char *, const char *, void *,
94	    pid_t *));
95{
96	struct fstab *fs;
97	struct diskentry *d, *nextdisk;
98	struct partentry *p;
99	int ret, pid, retcode, passno, sumstatus, status;
100	void *auxarg;
101	const char *name;
102
103	TAILQ_INIT(&badh);
104	TAILQ_INIT(&diskh);
105
106	sumstatus = 0;
107
108	for (passno = 1; passno <= 2; passno++) {
109		if (setfsent() == 0) {
110			warnx("Can't open checklist file: %s\n", _PATH_FSTAB);
111			return (8);
112		}
113		while ((fs = getfsent()) != 0) {
114			if ((auxarg = (*docheck)(fs)) == NULL)
115				continue;
116
117			/* XXX We don't need to search for blockdevs .. */
118			/* name = blockcheck(fs->fs_spec); */
119			name = fs->fs_spec;
120			if (flags & CHECK_DEBUG)
121				printf("pass %d, name %s\n", passno, name);
122
123			if ((flags & CHECK_PREEN) == 0 ||
124			    (passno == 1 && fs->fs_passno == 1)) {
125				if (name == NULL) {
126					if (flags & CHECK_PREEN)
127						return 8;
128					else
129						continue;
130				}
131				sumstatus = (*checkit)(fs->fs_vfstype,
132				    name, fs->fs_file, auxarg, NULL);
133
134				if (sumstatus)
135					return (sumstatus);
136			} else if (passno == 2 && fs->fs_passno > 1) {
137				if (name == NULL) {
138					(void) fprintf(stderr,
139					    "BAD DISK NAME %s\n", fs->fs_spec);
140					sumstatus |= 8;
141					continue;
142				}
143				addpart(fs->fs_vfstype, name, fs->fs_file,
144				    auxarg);
145			}
146		}
147		if ((flags & CHECK_PREEN) == 0)
148			return 0;
149	}
150
151	if (flags & CHECK_DEBUG)
152		printpart();
153
154	if (flags & CHECK_PREEN) {
155		if (maxrun == 0)
156			maxrun = ndisks;
157		if (maxrun > ndisks)
158			maxrun = ndisks;
159		nextdisk = TAILQ_FIRST(&diskh);
160		for (passno = 0; passno < maxrun; ++passno) {
161			if ((ret = startdisk(nextdisk, checkit)) != 0)
162				return ret;
163			nextdisk = TAILQ_NEXT(nextdisk, d_entries);
164		}
165
166		while ((pid = wait(&status)) != -1) {
167			TAILQ_FOREACH(d, &diskh, d_entries)
168				if (d->d_pid == pid)
169					break;
170
171			if (d == NULL) {
172				warnx("Unknown pid %d\n", pid);
173				continue;
174			}
175
176
177			if (WIFEXITED(status))
178				retcode = WEXITSTATUS(status);
179			else
180				retcode = 0;
181
182			p = TAILQ_FIRST(&d->d_part);
183
184			if (flags & (CHECK_DEBUG|CHECK_VERBOSE))
185				(void) printf("done %s: %s (%s) = 0x%x\n",
186				    p->p_type, p->p_devname, p->p_mntpt,
187				    status);
188
189			if (WIFSIGNALED(status)) {
190				(void) fprintf(stderr,
191				    "%s: %s (%s): EXITED WITH SIGNAL %d\n",
192				    p->p_type, p->p_devname, p->p_mntpt,
193				    WTERMSIG(status));
194				retcode = 8;
195			}
196
197			TAILQ_REMOVE(&d->d_part, p, p_entries);
198
199			if (retcode != 0) {
200				TAILQ_INSERT_TAIL(&badh, p, p_entries);
201				sumstatus |= retcode;
202			} else {
203				free(p->p_type);
204				free(p->p_devname);
205				free(p);
206			}
207			d->d_pid = 0;
208			nrun--;
209
210			if (TAILQ_EMPTY(&d->d_part))
211				ndisks--;
212
213			if (nextdisk == NULL) {
214				if (!TAILQ_EMPTY(&d->d_part)) {
215					if ((ret = startdisk(d, checkit)) != 0)
216						return ret;
217				}
218			} else if (nrun < maxrun && nrun < ndisks) {
219				for ( ;; ) {
220					nextdisk = TAILQ_NEXT(nextdisk, d_entries);
221					if (nextdisk == NULL)
222						nextdisk = TAILQ_FIRST(&diskh);
223					if (!TAILQ_EMPTY(&nextdisk->d_part)
224					    && nextdisk->d_pid == 0)
225						break;
226				}
227				if ((ret = startdisk(nextdisk, checkit)) != 0)
228					return ret;
229			}
230		}
231	}
232	if (sumstatus) {
233		p = badh.tqh_first;
234		if (p == NULL)
235			return (sumstatus);
236
237		(void) fprintf(stderr,
238			"THE FOLLOWING FILE SYSTEM%s HAD AN %s\n\t",
239			TAILQ_NEXT(p, p_entries) ? "S" : "",
240			"UNEXPECTED INCONSISTENCY:");
241
242		for (; p; p = TAILQ_NEXT(p, p_entries))
243			(void) fprintf(stderr,
244			    "%s: %s (%s)%s", p->p_type, p->p_devname,
245			    p->p_mntpt, TAILQ_NEXT(p, p_entries) ? ", " : "\n");
246
247		return sumstatus;
248	}
249	(void) endfsent();
250	return (0);
251}
252
253
254static struct diskentry *
255finddisk(name)
256	const char *name;
257{
258	const char *p;
259	size_t len = 0;
260	struct diskentry *d;
261
262	p = strrchr(name, '/');
263	if (p == NULL)
264		p = name;
265	else
266		p++;
267	for (; *p && !isdigit(*p); p++)
268		continue;
269	for (; *p && isdigit(*p); p++)
270		continue;
271	len = p - name;
272	if (len == 0)
273		len = strlen(name);
274
275	TAILQ_FOREACH(d, &diskh, d_entries)
276		if (strncmp(d->d_name, name, len) == 0 && d->d_name[len] == 0)
277			return d;
278
279	d = emalloc(sizeof(*d));
280	d->d_name = estrdup(name);
281	d->d_name[len] = '\0';
282	TAILQ_INIT(&d->d_part);
283	d->d_pid = 0;
284
285	TAILQ_INSERT_TAIL(&diskh, d, d_entries);
286	ndisks++;
287
288	return d;
289}
290
291
292static void
293printpart()
294{
295	struct diskentry *d;
296	struct partentry *p;
297
298	TAILQ_FOREACH(d, &diskh, d_entries) {
299		(void) printf("disk %s: ", d->d_name);
300		TAILQ_FOREACH(p, &d->d_part, p_entries)
301			(void) printf("%s ", p->p_devname);
302		(void) printf("\n");
303	}
304}
305
306
307static void
308addpart(type, devname, mntpt, auxarg)
309	const char *type, *devname, *mntpt;
310	void *auxarg;
311{
312	struct diskentry *d = finddisk(devname);
313	struct partentry *p;
314
315	TAILQ_FOREACH(p, &d->d_part, p_entries)
316		if (strcmp(p->p_devname, devname) == 0) {
317			warnx("%s in fstab more than once!\n", devname);
318			return;
319		}
320
321	p = emalloc(sizeof(*p));
322	p->p_devname = estrdup(devname);
323	p->p_mntpt = estrdup(mntpt);
324	p->p_type = estrdup(type);
325	p->p_auxarg = auxarg;
326
327	TAILQ_INSERT_TAIL(&d->d_part, p, p_entries);
328}
329
330
331static int
332startdisk(d, checkit)
333	struct diskentry *d;
334	int (*checkit) __P((const char *, const char *, const char *, void *,
335	    pid_t *));
336{
337	struct partentry *p = d->d_part.tqh_first;
338	int rv;
339
340	while ((rv = (*checkit)(p->p_type, p->p_devname, p->p_mntpt,
341	    p->p_auxarg, &d->d_pid)) != 0 && nrun > 0)
342		sleep(10);
343
344	if (rv == 0)
345		nrun++;
346
347	return rv;
348}
349