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
35 static const char copyright[] =
36 "@(#) Copyright (c) 1983, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
42 static char sccsid[] = "@(#)tunefs.c 8.2 (Berkeley) 4/19/94";
44 static const char rcsid[] =
45 "$FreeBSD: src/sbin/tunefs/tunefs.c,v 1.11.2.5 2001/10/14 21:50:39 iedowse Exp $";
49 * tunefs: change layout parameters to an existing file system.
51 #include <sys/param.h>
52 #include <sys/mount.h>
55 #include <ufs/ffs/fs.h>
56 #include <ufs/ufs/ufsmount.h>
67 /* the optimization warning string template */
68 #define OPTWARN "should optimize for %s with minfree %s %d%%"
74 #define sblock sbun.sb
79 void bwrite __P((daddr_t, const char *, int));
80 int bread __P((daddr_t, char *, int));
81 void getsb __P((struct fs *, const char *));
82 void putsb __P((struct fs *, const char *, int));
83 void usage __P((void));
84 void printfs __P((void));
92 const char *name, *action;
95 int Aflag = 0, active = 0;
98 char device[MAXPATHLEN];
105 special = argv[argc - 1];
106 fs = getfsfile(special);
108 if (statfs(special, &stfs) == 0 &&
109 strcmp(special, stfs.f_mntonname) == 0) {
112 special = fs->fs_spec;
115 if (stat(special, &st) < 0) {
116 if (*special != '/') {
119 (void)snprintf(device, sizeof(device), "%s%s",
124 err(1, "%s", special);
126 if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR)
127 errx(10, "%s: unknown file system", special);
128 getsb(&sblock, special);
129 for (; argc > 0 && argv[0][0] == '-'; argc--, argv++) {
130 for (cp = &argv[0][1]; *cp; cp++)
142 name = "maximum contiguous block count";
144 errx(10, "-a: missing %s", name);
148 errx(10, "%s must be >= 1 (was %s)",
150 warnx("%s changes from %d to %d",
151 name, sblock.fs_maxcontig, i);
152 sblock.fs_maxcontig = i;
157 "rotational delay between contiguous blocks";
159 errx(10, "-d: missing %s", name);
162 warnx("%s changes from %dms to %dms",
163 name, sblock.fs_rotdelay, i);
164 sblock.fs_rotdelay = i;
169 "maximum blocks per file in a cylinder group";
171 errx(10, "-e: missing %s", name);
175 errx(10, "%s must be >= 1 (was %s)",
177 warnx("%s changes from %d to %d",
178 name, sblock.fs_maxbpg, i);
179 sblock.fs_maxbpg = i;
183 name = "average file size";
185 errx(10, "-a: missing %s", name);
189 errx(10, "%s must be >= 1 (was %s)", name, *argv);
190 if (sblock.fs_avgfilesize == i) {
191 warnx("%s remains unchanged as %d",
194 warnx("%s changes from %d to %d",
195 name, sblock.fs_avgfilesize, i);
196 sblock.fs_avgfilesize = i;
201 name = "minimum percentage of free space";
203 errx(10, "-m: missing %s", name);
207 errx(10, "bad %s (%s)", name, *argv);
208 warnx("%s changes from %d%% to %d%%",
209 name, sblock.fs_minfree, i);
210 sblock.fs_minfree = i;
212 sblock.fs_optim == FS_OPTSPACE)
213 warnx(OPTWARN, "time", ">=", MINFREE);
215 sblock.fs_optim == FS_OPTTIME)
216 warnx(OPTWARN, "space", "<", MINFREE);
220 name = "soft updates";
222 errx(10, "-n: missing %s", name);
224 if (strcmp(*argv, "enable") == 0) {
225 sblock.fs_flags |= FS_DOSOFTDEP;
227 } else if (strcmp(*argv, "disable") == 0) {
228 sblock.fs_flags &= ~FS_DOSOFTDEP;
231 errx(10, "bad %s (options are %s)",
232 name, "`enable' or `disable'");
234 warnx("%s %s", name, action);
238 name = "optimization preference";
240 errx(10, "-o: missing %s", name);
242 chg[FS_OPTSPACE] = "space";
243 chg[FS_OPTTIME] = "time";
244 if (strcmp(*argv, chg[FS_OPTSPACE]) == 0)
246 else if (strcmp(*argv, chg[FS_OPTTIME]) == 0)
249 errx(10, "bad %s (options are `space' or `time')",
251 if (sblock.fs_optim == i) {
252 warnx("%s remains unchanged as %s",
256 warnx("%s changes from %s to %s",
257 name, chg[sblock.fs_optim], chg[i]);
259 if (sblock.fs_minfree >= MINFREE &&
261 warnx(OPTWARN, "time", ">=", MINFREE);
262 if (sblock.fs_minfree < MINFREE &&
264 warnx(OPTWARN, "space", "<", MINFREE);
268 name = "expected number of files per directory";
270 errx(10, "-a: missing %s", name);
274 errx(10, "%s must be >= 1 (was %s)", name, *argv);
275 if (sblock.fs_avgfpdir == i) {
276 warnx("%s remains unchanged as %d",
279 warnx("%s changes from %d to %d",
280 name, sblock.fs_avgfpdir, i);
281 sblock.fs_avgfpdir = i;
291 putsb(&sblock, special, Aflag);
293 bzero(&args, sizeof(args));
294 if (mount("ufs", fs->fs_file,
295 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
296 err(9, "%s: reload", special);
297 warnx("file system reloaded");
305 fprintf(stderr, "%s\n%s\n%s\n",
306 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
307 " [-m minfree] [-p] [-n enable | disable] [-o space | time]",
308 " [-s filesperdir] [special | filesystem]");
318 fi = open(file, O_RDONLY);
320 err(3, "cannot open %s", file);
321 if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE))
322 err(4, "%s: bad super block", file);
323 if (fs->fs_magic != FS_MAGIC)
324 errx(5, "%s: bad magic number", file);
325 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
337 * Re-open the device read-write. Use the read-only file
338 * descriptor as an interlock to prevent the device from
339 * being mounted while we are switching mode.
342 fi = open(file, O_RDWR);
345 err(3, "cannot open %s", file);
346 bwrite((daddr_t)SBOFF / dev_bsize, (const char *)fs, SBSIZE);
348 for (i = 0; i < fs->fs_ncg; i++)
349 bwrite(fsbtodb(fs, cgsblock(fs, i)),
350 (const char *)fs, SBSIZE);
357 warnx("soft updates: (-n) %s",
358 (sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
359 warnx("maximum contiguous block count: (-a) %d",
360 sblock.fs_maxcontig);
361 warnx("rotational delay between contiguous blocks: (-d) %d ms",
363 warnx("maximum blocks per file in a cylinder group: (-e) %d",
365 warnx("average file size: (-f) %d",
366 sblock.fs_avgfilesize);
367 warnx("average number of files in a directory: (-s) %d",
369 warnx("minimum percentage of free space: (-m) %d%%",
371 warnx("optimization preference: (-o) %s",
372 sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
373 if (sblock.fs_minfree >= MINFREE &&
374 sblock.fs_optim == FS_OPTSPACE)
375 warnx(OPTWARN, "time", ">=", MINFREE);
376 if (sblock.fs_minfree < MINFREE &&
377 sblock.fs_optim == FS_OPTTIME)
378 warnx(OPTWARN, "space", "<", MINFREE);
382 bwrite(blk, buf, size)
388 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
390 if (write(fi, buf, size) != size)
402 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
404 if ((i = read(fi, buf, cnt)) != cnt) {
405 for(i=0; i<sblock.fs_bsize; i++)