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mount_lfs.c revision 1.34.8.1
      1  1.34.8.1       tls /*	$NetBSD: mount_lfs.c,v 1.34.8.1 2014/08/20 00:02:26 tls Exp $	*/
      2       1.2       cgd 
      3       1.1   mycroft /*-
      4       1.1   mycroft  * Copyright (c) 1993, 1994
      5       1.1   mycroft  *	The Regents of the University of California.  All rights reserved.
      6       1.1   mycroft  *
      7       1.1   mycroft  * Redistribution and use in source and binary forms, with or without
      8       1.1   mycroft  * modification, are permitted provided that the following conditions
      9       1.1   mycroft  * are met:
     10       1.1   mycroft  * 1. Redistributions of source code must retain the above copyright
     11       1.1   mycroft  *    notice, this list of conditions and the following disclaimer.
     12       1.1   mycroft  * 2. Redistributions in binary form must reproduce the above copyright
     13       1.1   mycroft  *    notice, this list of conditions and the following disclaimer in the
     14       1.1   mycroft  *    documentation and/or other materials provided with the distribution.
     15      1.18       agc  * 3. Neither the name of the University nor the names of its contributors
     16       1.1   mycroft  *    may be used to endorse or promote products derived from this software
     17       1.1   mycroft  *    without specific prior written permission.
     18       1.1   mycroft  *
     19       1.1   mycroft  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20       1.1   mycroft  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21       1.1   mycroft  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22       1.1   mycroft  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23       1.1   mycroft  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24       1.1   mycroft  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25       1.1   mycroft  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26       1.1   mycroft  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27       1.1   mycroft  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28       1.1   mycroft  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29       1.1   mycroft  * SUCH DAMAGE.
     30       1.1   mycroft  */
     31       1.1   mycroft 
     32       1.5     lukem #include <sys/cdefs.h>
     33       1.1   mycroft #ifndef lint
     34      1.32     lukem __COPYRIGHT("@(#) Copyright (c) 1993, 1994\
     35      1.32     lukem  The Regents of the University of California.  All rights reserved.");
     36       1.1   mycroft #endif /* not lint */
     37       1.1   mycroft 
     38       1.1   mycroft #ifndef lint
     39       1.2       cgd #if 0
     40       1.6     lukem static char sccsid[] = "@(#)mount_lfs.c	8.4 (Berkeley) 4/26/95";
     41       1.2       cgd #else
     42  1.34.8.1       tls __RCSID("$NetBSD: mount_lfs.c,v 1.34.8.1 2014/08/20 00:02:26 tls Exp $");
     43       1.2       cgd #endif
     44       1.1   mycroft #endif /* not lint */
     45       1.1   mycroft 
     46       1.1   mycroft #include <sys/param.h>
     47       1.1   mycroft #include <sys/mount.h>
     48       1.7      fvdl 
     49       1.7      fvdl #include <ufs/ufs/ufsmount.h>
     50       1.1   mycroft 
     51       1.1   mycroft #include <err.h>
     52       1.8  perseant #include <errno.h>
     53       1.1   mycroft #include <stdio.h>
     54       1.1   mycroft #include <stdlib.h>
     55       1.1   mycroft #include <string.h>
     56       1.1   mycroft #include <unistd.h>
     57      1.12  perseant #include <paths.h>
     58      1.12  perseant 
     59      1.12  perseant #include <signal.h>
     60       1.1   mycroft 
     61      1.16  jdolecek #include <mntopts.h>
     62       1.1   mycroft #include "pathnames.h"
     63      1.33     pooka #include "mountprog.h"
     64      1.33     pooka #include "mount_lfs.h"
     65       1.1   mycroft 
     66      1.11  jdolecek static const struct mntopt mopts[] = {
     67       1.1   mycroft 	MOPT_STDOPTS,
     68       1.1   mycroft 	MOPT_UPDATE,
     69      1.14  christos 	MOPT_GETARGS,
     70      1.15  jdolecek 	MOPT_NOATIME,
     71      1.28  christos 	MOPT_NULL,
     72       1.1   mycroft };
     73       1.1   mycroft 
     74      1.34     joerg __dead static void	usage(void);
     75      1.33     pooka 
     76      1.33     pooka #ifdef WANT_CLEANER
     77      1.34     joerg __dead static void	invoke_cleaner(char *);
     78      1.22   xtraeme static void	kill_daemon(char *);
     79      1.22   xtraeme static void	kill_cleaner(char *);
     80      1.33     pooka #endif /* WANT_CLEANER */
     81       1.1   mycroft 
     82      1.33     pooka static int short_rds, cleaner_debug, cleaner_bytes, fs_idle, noclean;
     83      1.25  christos static const char *nsegs;
     84       1.1   mycroft 
     85      1.11  jdolecek #ifndef MOUNT_NOMAIN
     86       1.1   mycroft int
     87      1.22   xtraeme main(int argc, char **argv)
     88      1.11  jdolecek {
     89      1.33     pooka 
     90      1.33     pooka 	setprogname(argv[0]);
     91      1.11  jdolecek 	return mount_lfs(argc, argv);
     92      1.11  jdolecek }
     93      1.11  jdolecek #endif
     94      1.11  jdolecek 
     95      1.33     pooka void
     96      1.33     pooka mount_lfs_parseargs(int argc, char *argv[],
     97      1.33     pooka 	struct ufs_args *args, int *mntflags,
     98      1.33     pooka 	char *canon_dev, char *canon_dir)
     99       1.1   mycroft {
    100      1.33     pooka 	int ch;
    101      1.27  christos 	mntoptparse_t mp;
    102      1.12  perseant 
    103      1.33     pooka 	memset(args, 0, sizeof(*args));
    104      1.10  perseant 	nsegs = "4";
    105      1.33     pooka 	*mntflags = noclean = 0;
    106      1.10  perseant 	cleaner_bytes = 1;
    107      1.23   xtraeme 	while ((ch = getopt(argc, argv, "bdiN:no:s")) != -1)
    108       1.1   mycroft 		switch (ch) {
    109      1.10  perseant 		case 'b':
    110      1.10  perseant 			cleaner_bytes = !cleaner_bytes;
    111      1.10  perseant 			break;
    112       1.1   mycroft 		case 'd':
    113       1.1   mycroft 			cleaner_debug = 1;
    114       1.1   mycroft 			break;
    115      1.24   xtraeme 		case 'i':
    116      1.24   xtraeme 			fs_idle = 1;
    117      1.24   xtraeme 			break;
    118       1.1   mycroft 		case 'n':
    119       1.1   mycroft 			noclean = 1;
    120       1.1   mycroft 			break;
    121      1.10  perseant 		case 'N':
    122      1.10  perseant 			nsegs = optarg;
    123      1.10  perseant 			break;
    124       1.1   mycroft 		case 'o':
    125      1.33     pooka 			mp = getmntopts(optarg, mopts, mntflags, 0);
    126      1.27  christos 			if (mp == NULL)
    127      1.27  christos 				err(1, "getmntopts");
    128      1.27  christos 			freemntopts(mp);
    129       1.1   mycroft 			break;
    130       1.1   mycroft 		case 's':
    131       1.1   mycroft 			short_rds = 1;
    132       1.1   mycroft 			break;
    133       1.1   mycroft 		case '?':
    134       1.1   mycroft 		default:
    135       1.1   mycroft 			usage();
    136       1.1   mycroft 		}
    137       1.1   mycroft 	argc -= optind;
    138       1.1   mycroft 	argv += optind;
    139       1.1   mycroft 
    140       1.1   mycroft 	if (argc != 2)
    141       1.1   mycroft 		usage();
    142       1.1   mycroft 
    143      1.33     pooka 	pathadj(argv[0], canon_dev);
    144      1.33     pooka 	args->fspec = canon_dev;
    145      1.33     pooka 
    146      1.33     pooka 	pathadj(argv[1], canon_dir);
    147      1.33     pooka }
    148      1.33     pooka 
    149      1.33     pooka int
    150      1.33     pooka mount_lfs(int argc, char *argv[])
    151      1.33     pooka {
    152      1.33     pooka 	struct ufs_args args;
    153      1.33     pooka 	int mntflags;
    154      1.33     pooka 	int mntsize, oldflags, i;
    155      1.33     pooka 	char fs_name[MAXPATHLEN], canon_dev[MAXPATHLEN];
    156      1.33     pooka 	struct statvfs *mntbuf;
    157      1.33     pooka 	const char *errcause;
    158      1.21       erh 
    159      1.33     pooka 	mount_lfs_parseargs(argc, argv, &args, &mntflags, canon_dev, fs_name);
    160       1.1   mycroft 
    161      1.12  perseant 	/*
    162      1.12  perseant 	 * Record the previous status of this filesystem (if any) before
    163      1.12  perseant 	 * performing the mount, so we can know whether to start or
    164      1.12  perseant 	 * kill the cleaner process below.
    165      1.12  perseant 	 */
    166      1.12  perseant 	oldflags = MNT_RDONLY; /* If not mounted, pretend r/o */
    167      1.12  perseant 	if (mntflags & MNT_UPDATE) {
    168      1.12  perseant 		if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
    169      1.12  perseant 			err(1, "getmntinfo");
    170      1.12  perseant 		for (i = 0; i < mntsize; i++) {
    171      1.12  perseant 			if (strcmp(mntbuf[i].f_mntfromname, args.fspec) == 0) {
    172      1.19  christos 				oldflags = mntbuf[i].f_flag;
    173      1.12  perseant 				break;
    174      1.12  perseant 			}
    175      1.12  perseant 		}
    176      1.12  perseant 	}
    177      1.12  perseant 
    178      1.30     pooka 	if (mount(MOUNT_LFS, fs_name, mntflags, &args, sizeof args) == -1) {
    179       1.8  perseant 		switch (errno) {
    180       1.8  perseant 		case EMFILE:
    181       1.8  perseant 			errcause = "mount table full";
    182       1.8  perseant 			break;
    183       1.8  perseant 		case EINVAL:
    184       1.8  perseant 			if (mntflags & MNT_UPDATE)
    185       1.8  perseant 				errcause =
    186       1.8  perseant 			    "specified device does not match mounted device";
    187       1.8  perseant 			else
    188       1.8  perseant 				errcause = "incorrect super block";
    189       1.8  perseant 			break;
    190       1.8  perseant 		default:
    191       1.8  perseant 			errcause = strerror(errno);
    192       1.8  perseant 			break;
    193       1.8  perseant 		}
    194       1.8  perseant 		errx(1, "%s on %s: %s", args.fspec, fs_name, errcause);
    195       1.8  perseant 	}
    196       1.1   mycroft 
    197      1.33     pooka #ifdef WANT_CLEANER
    198      1.12  perseant 	/* Not mounting fresh or upgrading to r/w; don't start the cleaner */
    199      1.31     pooka 	if (!(oldflags & MNT_RDONLY) || (mntflags & MNT_RDONLY)
    200      1.31     pooka 	    || (mntflags & MNT_GETARGS))
    201      1.12  perseant 		noclean = 1;
    202       1.1   mycroft 	if (!noclean)
    203       1.1   mycroft 		invoke_cleaner(fs_name);
    204       1.1   mycroft 		/* NOTREACHED */
    205       1.1   mycroft 
    206      1.12  perseant 	/* Downgrade to r/o; kill the cleaner */
    207      1.12  perseant 	if ((mntflags & MNT_RDONLY) && !(oldflags & MNT_RDONLY))
    208      1.12  perseant 		kill_cleaner(fs_name);
    209  1.34.8.1       tls #else
    210  1.34.8.1       tls 	__USE(oldflags);
    211      1.33     pooka #endif /* WANT_CLEANER */
    212      1.12  perseant 
    213       1.1   mycroft 	exit(0);
    214      1.12  perseant }
    215      1.12  perseant 
    216      1.33     pooka #ifdef WANT_CLEANER
    217      1.12  perseant static void
    218      1.22   xtraeme kill_daemon(char *pidname)
    219      1.12  perseant {
    220      1.12  perseant 	FILE *fp;
    221      1.12  perseant 	char s[80];
    222      1.12  perseant 	pid_t pid;
    223      1.12  perseant 
    224      1.12  perseant 	fp = fopen(pidname, "r");
    225      1.12  perseant 	if (fp) {
    226      1.12  perseant 		fgets(s, 80, fp);
    227      1.12  perseant 		pid = atoi(s);
    228      1.12  perseant 		if (pid)
    229      1.12  perseant 			kill(pid, SIGINT);
    230      1.12  perseant 		fclose(fp);
    231      1.12  perseant 	}
    232      1.12  perseant }
    233      1.12  perseant 
    234      1.12  perseant static void
    235      1.22   xtraeme kill_cleaner(char *name)
    236      1.12  perseant {
    237      1.12  perseant 	char *pidname;
    238      1.12  perseant 	char *cp;
    239      1.12  perseant 	int off;
    240      1.12  perseant 
    241      1.12  perseant 	/* Parent first */
    242      1.17    itojun 	asprintf(&pidname, "%slfs_cleanerd:m:%s.pid", _PATH_VARRUN, name);
    243      1.17    itojun 	if (!pidname)
    244      1.17    itojun 		err(1, "malloc");
    245      1.12  perseant 	off = strlen(_PATH_VARRUN);
    246      1.12  perseant 	while((cp = strchr(pidname + off, '/')) != NULL)
    247      1.12  perseant 		*cp = '|';
    248      1.12  perseant 	kill_daemon(pidname);
    249      1.17    itojun 	free(pidname);
    250      1.12  perseant 
    251      1.12  perseant 	/* Then child */
    252      1.17    itojun 	asprintf(&pidname, "%slfs_cleanerd:s:%s.pid", _PATH_VARRUN, name);
    253      1.17    itojun 	if (!pidname)
    254      1.17    itojun 		err(1, "malloc");
    255      1.12  perseant 	off = strlen(_PATH_VARRUN);
    256      1.12  perseant 	while((cp = strchr(pidname + off, '/')) != NULL)
    257      1.12  perseant 		*cp = '|';
    258      1.12  perseant 	kill_daemon(pidname);
    259      1.17    itojun 	free(pidname);
    260       1.1   mycroft }
    261       1.1   mycroft 
    262      1.11  jdolecek static void
    263      1.22   xtraeme invoke_cleaner(char *name)
    264       1.1   mycroft {
    265      1.25  christos 	const char *args[7], **ap = args;
    266       1.1   mycroft 
    267       1.1   mycroft 	/* Build the argument list. */
    268       1.1   mycroft 	*ap++ = _PATH_LFS_CLEANERD;
    269      1.10  perseant 	if (cleaner_bytes)
    270      1.10  perseant 		*ap++ = "-b";
    271      1.10  perseant 	if (nsegs) {
    272      1.10  perseant 		*ap++ = "-n";
    273      1.10  perseant 		*ap++ = nsegs;
    274      1.10  perseant 	}
    275       1.1   mycroft 	if (short_rds)
    276       1.1   mycroft 		*ap++ = "-s";
    277       1.1   mycroft 	if (cleaner_debug)
    278       1.1   mycroft 		*ap++ = "-d";
    279      1.24   xtraeme 	if (fs_idle)
    280      1.24   xtraeme 		*ap++ = "-f";
    281       1.1   mycroft 	*ap++ = name;
    282       1.1   mycroft 	*ap = NULL;
    283       1.1   mycroft 
    284      1.25  christos 	execv(args[0], __UNCONST(args));
    285       1.1   mycroft 	err(1, "exec %s", _PATH_LFS_CLEANERD);
    286       1.1   mycroft }
    287      1.33     pooka #endif /* WANT_CLEANER */
    288       1.1   mycroft 
    289      1.11  jdolecek static void
    290      1.22   xtraeme usage(void)
    291       1.1   mycroft {
    292       1.1   mycroft 	(void)fprintf(stderr,
    293      1.23   xtraeme 		"usage: %s [-bdins] [-N nsegs] [-o options] special node\n",
    294      1.20       wiz 		getprogname());
    295       1.1   mycroft 	exit(1);
    296       1.1   mycroft }
    297