2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 * @(#) Copyright (c) 1983, 1993 The Regents of the University of California. All rights reserved.
34 * @(#)tunefs.c 8.2 (Berkeley) 4/19/94
35 * $FreeBSD: src/sbin/tunefs/tunefs.c,v 1.11.2.5 2001/10/14 21:50:39 iedowse Exp $
36 * $DragonFly: src/sbin/tunefs/tunefs.c,v 1.7 2006/04/03 01:58:49 dillon Exp $
40 * tunefs: change layout parameters to an existing file system.
42 #include <sys/param.h>
43 #include <sys/mount.h>
46 #include <vfs/ufs/dinode.h>
47 #include <vfs/ufs/fs.h>
48 #include <vfs/ufs/ufsmount.h>
59 /* the optimization warning string template */
60 #define OPTWARN "should optimize for %s with minfree %s %d%%"
66 #define sblock sbun.sb
71 void bwrite(daddr_t, const char *, int);
72 int bread(daddr_t, char *, int);
73 void getsb(struct fs *, const char *);
74 void putsb(struct fs *, const char *, int);
79 main(int argc, char **argv)
82 const char *name, *action;
85 int Aflag = 0, active = 0;
88 char device[MAXPATHLEN];
95 special = argv[argc - 1];
96 fs = getfsfile(special);
98 if (statfs(special, &stfs) == 0 &&
99 strcmp(special, stfs.f_mntonname) == 0) {
102 special = fs->fs_spec;
105 if (stat(special, &st) < 0) {
106 if (*special != '/') {
109 snprintf(device, sizeof(device), "%s%s",
114 err(1, "%s", special);
116 if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR)
117 errx(10, "%s: unknown file system", special);
118 getsb(&sblock, special);
119 for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
120 for (cp = &argv[0][1]; *cp; cp++)
132 name = "maximum contiguous block count";
134 errx(10, "-a: missing %s", name);
138 errx(10, "%s must be >= 1 (was %s)",
140 warnx("%s changes from %d to %d",
141 name, sblock.fs_maxcontig, i);
142 sblock.fs_maxcontig = i;
147 "rotational delay between contiguous blocks";
149 errx(10, "-d: missing %s", name);
152 warnx("%s changes from %dms to %dms",
153 name, sblock.fs_rotdelay, i);
154 sblock.fs_rotdelay = i;
159 "maximum blocks per file in a cylinder group";
161 errx(10, "-e: missing %s", name);
165 errx(10, "%s must be >= 1 (was %s)",
167 warnx("%s changes from %d to %d",
168 name, sblock.fs_maxbpg, i);
169 sblock.fs_maxbpg = i;
173 name = "average file size";
175 errx(10, "-a: missing %s", name);
179 errx(10, "%s must be >= 1 (was %s)", name, *argv);
180 if (sblock.fs_avgfilesize == i) {
181 warnx("%s remains unchanged as %d",
184 warnx("%s changes from %d to %d",
185 name, sblock.fs_avgfilesize, i);
186 sblock.fs_avgfilesize = i;
191 name = "minimum percentage of free space";
193 errx(10, "-m: missing %s", name);
197 errx(10, "bad %s (%s)", name, *argv);
198 warnx("%s changes from %d%% to %d%%",
199 name, sblock.fs_minfree, i);
200 sblock.fs_minfree = i;
202 sblock.fs_optim == FS_OPTSPACE)
203 warnx(OPTWARN, "time", ">=", MINFREE);
205 sblock.fs_optim == FS_OPTTIME)
206 warnx(OPTWARN, "space", "<", MINFREE);
210 name = "soft updates";
212 errx(10, "-n: missing %s", name);
214 if (strcmp(*argv, "enable") == 0) {
215 sblock.fs_flags |= FS_DOSOFTDEP;
217 } else if (strcmp(*argv, "disable") == 0) {
218 sblock.fs_flags &= ~FS_DOSOFTDEP;
221 errx(10, "bad %s (options are %s)",
222 name, "`enable' or `disable'");
224 warnx("%s %s", name, action);
228 name = "optimization preference";
230 errx(10, "-o: missing %s", name);
232 chg[FS_OPTSPACE] = "space";
233 chg[FS_OPTTIME] = "time";
234 if (strcmp(*argv, chg[FS_OPTSPACE]) == 0)
236 else if (strcmp(*argv, chg[FS_OPTTIME]) == 0)
239 errx(10, "bad %s (options are `space' or `time')",
241 if (sblock.fs_optim == i) {
242 warnx("%s remains unchanged as %s",
246 warnx("%s changes from %s to %s",
247 name, chg[sblock.fs_optim], chg[i]);
249 if (sblock.fs_minfree >= MINFREE &&
251 warnx(OPTWARN, "time", ">=", MINFREE);
252 if (sblock.fs_minfree < MINFREE &&
254 warnx(OPTWARN, "space", "<", MINFREE);
258 name = "expected number of files per directory";
260 errx(10, "-a: missing %s", name);
264 errx(10, "%s must be >= 1 (was %s)", name, *argv);
265 if (sblock.fs_avgfpdir == i) {
266 warnx("%s remains unchanged as %d",
269 warnx("%s changes from %d to %d",
270 name, sblock.fs_avgfpdir, i);
271 sblock.fs_avgfpdir = i;
281 putsb(&sblock, special, Aflag);
283 bzero(&args, sizeof(args));
284 if (mount("ufs", fs->fs_file,
285 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
286 err(9, "%s: reload", special);
287 warnx("file system reloaded");
295 fprintf(stderr, "%s\n%s\n%s\n",
296 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
297 " [-m minfree] [-p] [-n enable | disable] [-o space | time]",
298 " [-s filesperdir] [special | filesystem]");
303 getsb(struct fs *fs, const char *file)
306 fi = open(file, O_RDONLY);
308 err(3, "cannot open %s", file);
309 if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE))
310 err(4, "%s: bad super block", file);
311 if (fs->fs_magic != FS_MAGIC)
312 errx(5, "%s: bad magic number", file);
313 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
317 putsb(struct fs *fs, const char *file, int all)
322 * Re-open the device read-write. Use the read-only file
323 * descriptor as an interlock to prevent the device from
324 * being mounted while we are switching mode.
327 fi = open(file, O_RDWR);
330 err(3, "cannot open %s", file);
331 bwrite((daddr_t)SBOFF / dev_bsize, (const char *)fs, SBSIZE);
333 for (i = 0; i < fs->fs_ncg; i++)
334 bwrite(fsbtodb(fs, cgsblock(fs, i)),
335 (const char *)fs, SBSIZE);
342 warnx("soft updates: (-n) %s",
343 (sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
344 warnx("maximum contiguous block count: (-a) %d",
345 sblock.fs_maxcontig);
346 warnx("rotational delay between contiguous blocks: (-d) %d ms",
348 warnx("maximum blocks per file in a cylinder group: (-e) %d",
350 warnx("average file size: (-f) %d",
351 sblock.fs_avgfilesize);
352 warnx("average number of files in a directory: (-s) %d",
354 warnx("minimum percentage of free space: (-m) %d%%",
356 warnx("optimization preference: (-o) %s",
357 sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
358 if (sblock.fs_minfree >= MINFREE &&
359 sblock.fs_optim == FS_OPTSPACE)
360 warnx(OPTWARN, "time", ">=", MINFREE);
361 if (sblock.fs_minfree < MINFREE &&
362 sblock.fs_optim == FS_OPTTIME)
363 warnx(OPTWARN, "space", "<", MINFREE);
367 bwrite(daddr_t blk, const char *buf, int size)
370 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
372 if (write(fi, buf, size) != size)
377 bread(daddr_t bno, char *buf, int cnt)
381 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
383 if ((i = read(fi, buf, cnt)) != cnt) {
384 for(i=0; i<sblock.fs_bsize; i++)