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 1.3 2003/08/08 04:18:41 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/fs.h>
47 #include <vfs/ufs/ufsmount.h>
58 /* the optimization warning string template */
59 #define OPTWARN "should optimize for %s with minfree %s %d%%"
65 #define sblock sbun.sb
70 void bwrite __P((daddr_t, const char *, int));
71 int bread __P((daddr_t, char *, int));
72 void getsb __P((struct fs *, const char *));
73 void putsb __P((struct fs *, const char *, int));
74 void usage __P((void));
75 void printfs __P((void));
83 const char *name, *action;
86 int Aflag = 0, active = 0;
89 char device[MAXPATHLEN];
96 special = argv[argc - 1];
97 fs = getfsfile(special);
99 if (statfs(special, &stfs) == 0 &&
100 strcmp(special, stfs.f_mntonname) == 0) {
103 special = fs->fs_spec;
106 if (stat(special, &st) < 0) {
107 if (*special != '/') {
110 (void)snprintf(device, sizeof(device), "%s%s",
115 err(1, "%s", special);
117 if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR)
118 errx(10, "%s: unknown file system", special);
119 getsb(&sblock, special);
120 for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
121 for (cp = &argv[0][1]; *cp; cp++)
133 name = "maximum contiguous block count";
135 errx(10, "-a: missing %s", name);
139 errx(10, "%s must be >= 1 (was %s)",
141 warnx("%s changes from %d to %d",
142 name, sblock.fs_maxcontig, i);
143 sblock.fs_maxcontig = i;
148 "rotational delay between contiguous blocks";
150 errx(10, "-d: missing %s", name);
153 warnx("%s changes from %dms to %dms",
154 name, sblock.fs_rotdelay, i);
155 sblock.fs_rotdelay = i;
160 "maximum blocks per file in a cylinder group";
162 errx(10, "-e: missing %s", name);
166 errx(10, "%s must be >= 1 (was %s)",
168 warnx("%s changes from %d to %d",
169 name, sblock.fs_maxbpg, i);
170 sblock.fs_maxbpg = i;
174 name = "average file size";
176 errx(10, "-a: missing %s", name);
180 errx(10, "%s must be >= 1 (was %s)", name, *argv);
181 if (sblock.fs_avgfilesize == i) {
182 warnx("%s remains unchanged as %d",
185 warnx("%s changes from %d to %d",
186 name, sblock.fs_avgfilesize, i);
187 sblock.fs_avgfilesize = i;
192 name = "minimum percentage of free space";
194 errx(10, "-m: missing %s", name);
198 errx(10, "bad %s (%s)", name, *argv);
199 warnx("%s changes from %d%% to %d%%",
200 name, sblock.fs_minfree, i);
201 sblock.fs_minfree = i;
203 sblock.fs_optim == FS_OPTSPACE)
204 warnx(OPTWARN, "time", ">=", MINFREE);
206 sblock.fs_optim == FS_OPTTIME)
207 warnx(OPTWARN, "space", "<", MINFREE);
211 name = "soft updates";
213 errx(10, "-n: missing %s", name);
215 if (strcmp(*argv, "enable") == 0) {
216 sblock.fs_flags |= FS_DOSOFTDEP;
218 } else if (strcmp(*argv, "disable") == 0) {
219 sblock.fs_flags &= ~FS_DOSOFTDEP;
222 errx(10, "bad %s (options are %s)",
223 name, "`enable' or `disable'");
225 warnx("%s %s", name, action);
229 name = "optimization preference";
231 errx(10, "-o: missing %s", name);
233 chg[FS_OPTSPACE] = "space";
234 chg[FS_OPTTIME] = "time";
235 if (strcmp(*argv, chg[FS_OPTSPACE]) == 0)
237 else if (strcmp(*argv, chg[FS_OPTTIME]) == 0)
240 errx(10, "bad %s (options are `space' or `time')",
242 if (sblock.fs_optim == i) {
243 warnx("%s remains unchanged as %s",
247 warnx("%s changes from %s to %s",
248 name, chg[sblock.fs_optim], chg[i]);
250 if (sblock.fs_minfree >= MINFREE &&
252 warnx(OPTWARN, "time", ">=", MINFREE);
253 if (sblock.fs_minfree < MINFREE &&
255 warnx(OPTWARN, "space", "<", MINFREE);
259 name = "expected number of files per directory";
261 errx(10, "-a: missing %s", name);
265 errx(10, "%s must be >= 1 (was %s)", name, *argv);
266 if (sblock.fs_avgfpdir == i) {
267 warnx("%s remains unchanged as %d",
270 warnx("%s changes from %d to %d",
271 name, sblock.fs_avgfpdir, i);
272 sblock.fs_avgfpdir = i;
282 putsb(&sblock, special, Aflag);
284 bzero(&args, sizeof(args));
285 if (mount("ufs", fs->fs_file,
286 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
287 err(9, "%s: reload", special);
288 warnx("file system reloaded");
296 fprintf(stderr, "%s\n%s\n%s\n",
297 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
298 " [-m minfree] [-p] [-n enable | disable] [-o space | time]",
299 " [-s filesperdir] [special | filesystem]");
309 fi = open(file, O_RDONLY);
311 err(3, "cannot open %s", file);
312 if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE))
313 err(4, "%s: bad super block", file);
314 if (fs->fs_magic != FS_MAGIC)
315 errx(5, "%s: bad magic number", file);
316 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
328 * Re-open the device read-write. Use the read-only file
329 * descriptor as an interlock to prevent the device from
330 * being mounted while we are switching mode.
333 fi = open(file, O_RDWR);
336 err(3, "cannot open %s", file);
337 bwrite((daddr_t)SBOFF / dev_bsize, (const char *)fs, SBSIZE);
339 for (i = 0; i < fs->fs_ncg; i++)
340 bwrite(fsbtodb(fs, cgsblock(fs, i)),
341 (const char *)fs, SBSIZE);
348 warnx("soft updates: (-n) %s",
349 (sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
350 warnx("maximum contiguous block count: (-a) %d",
351 sblock.fs_maxcontig);
352 warnx("rotational delay between contiguous blocks: (-d) %d ms",
354 warnx("maximum blocks per file in a cylinder group: (-e) %d",
356 warnx("average file size: (-f) %d",
357 sblock.fs_avgfilesize);
358 warnx("average number of files in a directory: (-s) %d",
360 warnx("minimum percentage of free space: (-m) %d%%",
362 warnx("optimization preference: (-o) %s",
363 sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
364 if (sblock.fs_minfree >= MINFREE &&
365 sblock.fs_optim == FS_OPTSPACE)
366 warnx(OPTWARN, "time", ">=", MINFREE);
367 if (sblock.fs_minfree < MINFREE &&
368 sblock.fs_optim == FS_OPTTIME)
369 warnx(OPTWARN, "space", "<", MINFREE);
373 bwrite(blk, buf, size)
379 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
381 if (write(fi, buf, size) != size)
393 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
395 if ((i = read(fi, buf, cnt)) != cnt) {
396 for(i=0; i<sblock.fs_bsize; i++)