mount_lfs.c revision 1.26 1 1.26 jmmv /* $NetBSD: mount_lfs.c,v 1.26 2005/09/23 12:10:35 jmmv 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 1.5 lukem __COPYRIGHT("@(#) Copyright (c) 1993, 1994\n\
35 1.5 lukem The Regents of the University of California. All rights reserved.\n");
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 1.26 jmmv __RCSID("$NetBSD: mount_lfs.c,v 1.26 2005/09/23 12:10:35 jmmv 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 1.1 mycroft
64 1.11 jdolecek static const struct mntopt mopts[] = {
65 1.1 mycroft MOPT_STDOPTS,
66 1.1 mycroft MOPT_UPDATE,
67 1.14 christos MOPT_GETARGS,
68 1.15 jdolecek MOPT_NOATIME,
69 1.1 mycroft { NULL }
70 1.1 mycroft };
71 1.1 mycroft
72 1.22 xtraeme int mount_lfs(int, char *[]);
73 1.22 xtraeme static void invoke_cleaner(char *);
74 1.22 xtraeme static void usage(void);
75 1.22 xtraeme static void kill_daemon(char *);
76 1.22 xtraeme static void kill_cleaner(char *);
77 1.1 mycroft
78 1.23 xtraeme static int short_rds, cleaner_debug, cleaner_bytes, fs_idle;
79 1.25 christos static const char *nsegs;
80 1.1 mycroft
81 1.11 jdolecek #ifndef MOUNT_NOMAIN
82 1.1 mycroft int
83 1.22 xtraeme main(int argc, char **argv)
84 1.11 jdolecek {
85 1.11 jdolecek return mount_lfs(argc, argv);
86 1.11 jdolecek }
87 1.11 jdolecek #endif
88 1.11 jdolecek
89 1.11 jdolecek int
90 1.22 xtraeme mount_lfs(int argc, char *argv[])
91 1.1 mycroft {
92 1.1 mycroft struct ufs_args args;
93 1.12 perseant int ch, mntflags, noclean, mntsize, oldflags, i;
94 1.21 erh char fs_name[MAXPATHLEN], canon_dev[MAXPATHLEN];
95 1.21 erh char *options;
96 1.12 perseant
97 1.8 perseant const char *errcause;
98 1.19 christos struct statvfs *mntbuf;
99 1.1 mycroft
100 1.1 mycroft options = NULL;
101 1.10 perseant nsegs = "4";
102 1.1 mycroft mntflags = noclean = 0;
103 1.10 perseant cleaner_bytes = 1;
104 1.23 xtraeme while ((ch = getopt(argc, argv, "bdiN:no:s")) != -1)
105 1.1 mycroft switch (ch) {
106 1.10 perseant case 'b':
107 1.10 perseant cleaner_bytes = !cleaner_bytes;
108 1.10 perseant break;
109 1.1 mycroft case 'd':
110 1.1 mycroft cleaner_debug = 1;
111 1.1 mycroft break;
112 1.24 xtraeme case 'i':
113 1.24 xtraeme fs_idle = 1;
114 1.24 xtraeme break;
115 1.1 mycroft case 'n':
116 1.1 mycroft noclean = 1;
117 1.1 mycroft break;
118 1.10 perseant case 'N':
119 1.10 perseant nsegs = optarg;
120 1.10 perseant break;
121 1.1 mycroft case 'o':
122 1.6 lukem getmntopts(optarg, mopts, &mntflags, 0);
123 1.1 mycroft break;
124 1.1 mycroft case 's':
125 1.1 mycroft short_rds = 1;
126 1.1 mycroft break;
127 1.1 mycroft case '?':
128 1.1 mycroft default:
129 1.1 mycroft usage();
130 1.1 mycroft }
131 1.1 mycroft argc -= optind;
132 1.1 mycroft argv += optind;
133 1.1 mycroft
134 1.1 mycroft if (argc != 2)
135 1.1 mycroft usage();
136 1.1 mycroft
137 1.21 erh if (realpath(argv[0], canon_dev) == NULL) /* Check device path */
138 1.21 erh err(1, "realpath %s", argv[0]);
139 1.21 erh if (strncmp(argv[0], canon_dev, MAXPATHLEN)) {
140 1.21 erh warnx("\"%s\" is a relative path.", argv[0]);
141 1.21 erh warnx("using \"%s\" instead.", canon_dev);
142 1.21 erh }
143 1.21 erh args.fspec = canon_dev;
144 1.21 erh
145 1.21 erh if (realpath(argv[1], fs_name) == NULL) /* Check mounton path */
146 1.21 erh err(1, "realpath %s", argv[1]);
147 1.21 erh if (strncmp(argv[1], fs_name, MAXPATHLEN)) {
148 1.21 erh warnx("\"%s\" is a relative path.", argv[1]);
149 1.21 erh warnx("using \"%s\" instead.", fs_name);
150 1.21 erh }
151 1.1 mycroft
152 1.12 perseant /*
153 1.12 perseant * Record the previous status of this filesystem (if any) before
154 1.12 perseant * performing the mount, so we can know whether to start or
155 1.12 perseant * kill the cleaner process below.
156 1.12 perseant */
157 1.12 perseant oldflags = MNT_RDONLY; /* If not mounted, pretend r/o */
158 1.12 perseant if (mntflags & MNT_UPDATE) {
159 1.12 perseant if ((mntsize = getmntinfo(&mntbuf, MNT_NOWAIT)) == 0)
160 1.12 perseant err(1, "getmntinfo");
161 1.12 perseant for (i = 0; i < mntsize; i++) {
162 1.12 perseant if (strcmp(mntbuf[i].f_mntfromname, args.fspec) == 0) {
163 1.19 christos oldflags = mntbuf[i].f_flag;
164 1.12 perseant break;
165 1.12 perseant }
166 1.12 perseant }
167 1.12 perseant }
168 1.12 perseant
169 1.8 perseant if (mount(MOUNT_LFS, fs_name, mntflags, &args)) {
170 1.8 perseant switch (errno) {
171 1.8 perseant case EMFILE:
172 1.8 perseant errcause = "mount table full";
173 1.8 perseant break;
174 1.8 perseant case EINVAL:
175 1.8 perseant if (mntflags & MNT_UPDATE)
176 1.8 perseant errcause =
177 1.8 perseant "specified device does not match mounted device";
178 1.8 perseant else
179 1.8 perseant errcause = "incorrect super block";
180 1.8 perseant break;
181 1.8 perseant default:
182 1.8 perseant errcause = strerror(errno);
183 1.8 perseant break;
184 1.8 perseant }
185 1.8 perseant errx(1, "%s on %s: %s", args.fspec, fs_name, errcause);
186 1.8 perseant }
187 1.1 mycroft
188 1.12 perseant /* Not mounting fresh or upgrading to r/w; don't start the cleaner */
189 1.12 perseant if (!(oldflags & MNT_RDONLY) || (mntflags & MNT_RDONLY))
190 1.12 perseant noclean = 1;
191 1.1 mycroft if (!noclean)
192 1.1 mycroft invoke_cleaner(fs_name);
193 1.1 mycroft /* NOTREACHED */
194 1.1 mycroft
195 1.12 perseant /* Downgrade to r/o; kill the cleaner */
196 1.12 perseant if ((mntflags & MNT_RDONLY) && !(oldflags & MNT_RDONLY))
197 1.12 perseant kill_cleaner(fs_name);
198 1.12 perseant
199 1.1 mycroft exit(0);
200 1.12 perseant }
201 1.12 perseant
202 1.12 perseant static void
203 1.22 xtraeme kill_daemon(char *pidname)
204 1.12 perseant {
205 1.12 perseant FILE *fp;
206 1.12 perseant char s[80];
207 1.12 perseant pid_t pid;
208 1.12 perseant
209 1.12 perseant fp = fopen(pidname, "r");
210 1.12 perseant if (fp) {
211 1.12 perseant fgets(s, 80, fp);
212 1.12 perseant pid = atoi(s);
213 1.12 perseant if (pid)
214 1.12 perseant kill(pid, SIGINT);
215 1.12 perseant fclose(fp);
216 1.12 perseant }
217 1.12 perseant }
218 1.12 perseant
219 1.12 perseant static void
220 1.22 xtraeme kill_cleaner(char *name)
221 1.12 perseant {
222 1.12 perseant char *pidname;
223 1.12 perseant char *cp;
224 1.12 perseant int off;
225 1.12 perseant
226 1.12 perseant /* Parent first */
227 1.17 itojun asprintf(&pidname, "%slfs_cleanerd:m:%s.pid", _PATH_VARRUN, name);
228 1.17 itojun if (!pidname)
229 1.17 itojun err(1, "malloc");
230 1.12 perseant off = strlen(_PATH_VARRUN);
231 1.12 perseant while((cp = strchr(pidname + off, '/')) != NULL)
232 1.12 perseant *cp = '|';
233 1.12 perseant kill_daemon(pidname);
234 1.17 itojun free(pidname);
235 1.12 perseant
236 1.12 perseant /* Then child */
237 1.17 itojun asprintf(&pidname, "%slfs_cleanerd:s:%s.pid", _PATH_VARRUN, name);
238 1.17 itojun if (!pidname)
239 1.17 itojun err(1, "malloc");
240 1.12 perseant off = strlen(_PATH_VARRUN);
241 1.12 perseant while((cp = strchr(pidname + off, '/')) != NULL)
242 1.12 perseant *cp = '|';
243 1.12 perseant kill_daemon(pidname);
244 1.17 itojun free(pidname);
245 1.1 mycroft }
246 1.1 mycroft
247 1.11 jdolecek static void
248 1.22 xtraeme invoke_cleaner(char *name)
249 1.1 mycroft {
250 1.25 christos const char *args[7], **ap = args;
251 1.1 mycroft
252 1.1 mycroft /* Build the argument list. */
253 1.1 mycroft *ap++ = _PATH_LFS_CLEANERD;
254 1.10 perseant if (cleaner_bytes)
255 1.10 perseant *ap++ = "-b";
256 1.10 perseant if (nsegs) {
257 1.10 perseant *ap++ = "-n";
258 1.10 perseant *ap++ = nsegs;
259 1.10 perseant }
260 1.1 mycroft if (short_rds)
261 1.1 mycroft *ap++ = "-s";
262 1.1 mycroft if (cleaner_debug)
263 1.1 mycroft *ap++ = "-d";
264 1.24 xtraeme if (fs_idle)
265 1.24 xtraeme *ap++ = "-f";
266 1.1 mycroft *ap++ = name;
267 1.1 mycroft *ap = NULL;
268 1.1 mycroft
269 1.25 christos execv(args[0], __UNCONST(args));
270 1.1 mycroft err(1, "exec %s", _PATH_LFS_CLEANERD);
271 1.1 mycroft }
272 1.1 mycroft
273 1.11 jdolecek static void
274 1.22 xtraeme usage(void)
275 1.1 mycroft {
276 1.1 mycroft (void)fprintf(stderr,
277 1.23 xtraeme "usage: %s [-bdins] [-N nsegs] [-o options] special node\n",
278 1.20 wiz getprogname());
279 1.1 mycroft exit(1);
280 1.1 mycroft }
281