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[] =
49 * tunefs: change layout parameters to an existing filesystem.
51 #include <sys/param.h>
52 #include <sys/mount.h>
53 #include <sys/disklabel.h>
56 #include <ufs/ffs/fs.h>
57 #include <ufs/ufs/ufsmount.h>
68 /* the optimization warning string template */
69 #define OPTWARN "should optimize for %s with minfree %s %d%%"
75 #define sblock sbun.sb
80 void bwrite(daddr_t, const char *, int);
81 int bread(daddr_t, char *, int);
82 void getsb(struct fs *, const char *);
83 void putsb(struct fs *, const char *, int);
95 int Aflag = 0, active = 0;
96 int aflag = 0, dflag = 0, eflag = 0, fflag = 0, mflag = 0;
97 int nflag = 0, oflag = 0, pflag = 0, sflag = 0;
98 int avalue = 0, dvalue = 0, evalue = 0, fvalue = 0;
99 int mvalue = 0, ovalue = 0, svalue = 0;
103 char device[MAXPATHLEN];
104 struct ufs_args args;
110 found_arg = 0; /* at least one arg is required */
111 while ((ch = getopt(argc, argv, "Aa:d:e:f:m:n:o:ps:")) != -1)
119 name = "maximum contiguous block count";
120 avalue = atoi(optarg);
122 errx(10, "%s must be >= 1 (was %s)", name, optarg);
127 name = "rotational delay between contiguous blocks";
128 dvalue = atoi(optarg);
133 name = "maximum blocks per file in a cylinder group";
134 evalue = atoi(optarg);
136 errx(10, "%s must be >= 1 (was %s)", name, optarg);
141 name = "average file size";
142 fvalue = atoi(optarg);
144 errx(10, "%s must be >= 1 (was %s)", name, optarg);
149 name = "minimum percentage of free space";
150 mvalue = atoi(optarg);
151 if (mvalue < 0 || mvalue > 99)
152 errx(10, "bad %s (%s)", name, optarg);
157 name = "soft updates";
159 if (strcmp(nvalue, "enable") && strcmp(nvalue, "disable")) {
160 errx(10, "bad %s (options are %s)",
161 name, "`enable' or `disable'");
167 name = "optimization preference";
168 chg[FS_OPTSPACE] = "space";
169 chg[FS_OPTTIME] = "time";
170 if (strcmp(optarg, chg[FS_OPTSPACE]) == 0)
171 ovalue = FS_OPTSPACE;
172 else if (strcmp(optarg, chg[FS_OPTTIME]) == 0)
175 errx(10, "bad %s (options are `space' or `time')",
185 name = "expected number of files per directory";
186 svalue = atoi(optarg);
188 errx(10, "%s must be >= 1 (was %s)", name, optarg);
197 if (found_arg == 0 || argc != 1)
201 fs = getfsfile(special);
203 if (statfs(special, &stfs) == 0 &&
204 strcmp(special, stfs.f_mntonname) == 0) {
207 special = fs->fs_spec;
210 if (stat(special, &st) < 0) {
211 if (*special != '/') {
214 (void)snprintf(device, sizeof(device), "%s%s",
219 err(1, "%s", special);
221 if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR)
222 errx(10, "%s: unknown filesystem", special);
223 getsb(&sblock, special);
230 name = "maximum contiguous block count";
231 if (sblock.fs_maxcontig == avalue) {
232 warnx("%s remains unchanged as %d", name, avalue);
235 warnx("%s changes from %d to %d",
236 name, sblock.fs_maxcontig, avalue);
237 sblock.fs_maxcontig = avalue;
241 name = "rotational delay between contiguous blocks";
242 if (sblock.fs_rotdelay == dvalue) {
243 warnx("%s remains unchanged as %dms", name, dvalue);
246 warnx("%s changes from %dms to %dms",
247 name, sblock.fs_rotdelay, dvalue);
248 sblock.fs_rotdelay = dvalue;
252 name = "maximum blocks per file in a cylinder group";
253 if (sblock.fs_maxbpg == evalue) {
254 warnx("%s remains unchanged as %d", name, evalue);
257 warnx("%s changes from %d to %d",
258 name, sblock.fs_maxbpg, evalue);
259 sblock.fs_maxbpg = evalue;
263 name = "average file size";
264 if (sblock.fs_avgfilesize == fvalue) {
265 warnx("%s remains unchanged as %d", name, fvalue);
268 warnx("%s changes from %d to %d",
269 name, sblock.fs_avgfilesize, fvalue);
270 sblock.fs_avgfilesize = fvalue;
274 name = "minimum percentage of free space";
275 if (sblock.fs_minfree == mvalue) {
276 warnx("%s remains unchanged as %d%%", name, mvalue);
279 warnx("%s changes from %d%% to %d%%",
280 name, sblock.fs_minfree, mvalue);
281 sblock.fs_minfree = mvalue;
282 if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE)
283 warnx(OPTWARN, "time", ">=", MINFREE);
284 if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME)
285 warnx(OPTWARN, "space", "<", MINFREE);
289 name = "soft updates";
290 if (strcmp(nvalue, "enable") == 0) {
291 if (sblock.fs_flags & FS_DOSOFTDEP) {
292 warnx("%s remains unchanged as enabled", name);
293 } else if (sblock.fs_clean == 0) {
294 warnx("%s cannot be enabled until fsck is run",
297 sblock.fs_flags |= FS_DOSOFTDEP;
298 warnx("%s set", name);
300 } else if (strcmp(nvalue, "disable") == 0) {
301 if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP) {
302 warnx("%s remains unchanged as disabled", name);
304 sblock.fs_flags &= ~FS_DOSOFTDEP;
305 warnx("%s cleared", name);
310 name = "optimization preference";
311 chg[FS_OPTSPACE] = "space";
312 chg[FS_OPTTIME] = "time";
313 if (sblock.fs_optim == ovalue) {
314 warnx("%s remains unchanged as %s", name, chg[ovalue]);
317 warnx("%s changes from %s to %s",
318 name, chg[sblock.fs_optim], chg[ovalue]);
319 sblock.fs_optim = ovalue;
320 if (sblock.fs_minfree >= MINFREE &&
321 ovalue == FS_OPTSPACE)
322 warnx(OPTWARN, "time", ">=", MINFREE);
323 if (sblock.fs_minfree < MINFREE &&
324 ovalue == FS_OPTTIME)
325 warnx(OPTWARN, "space", "<", MINFREE);
329 name = "expected number of files per directory";
330 if (sblock.fs_avgfpdir == svalue) {
331 warnx("%s remains unchanged as %d", name, svalue);
334 warnx("%s changes from %d to %d",
335 name, sblock.fs_avgfpdir, svalue);
336 sblock.fs_avgfpdir = svalue;
340 putsb(&sblock, special, Aflag);
342 bzero(&args, sizeof(args));
343 if (mount("ufs", fs->fs_file,
344 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
345 err(9, "%s: reload", special);
346 warnx("filesystem reloaded");
354 fprintf(stderr, "%s\n%s\n%s\n",
355 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
356 " [-m minfree] [-p] [-n enable | disable] [-o space | time]",
357 " [-s filesperdir] special | filesystem");
367 fi = open(file, O_RDONLY);
369 err(3, "cannot open %s", file);
370 if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE))
371 err(4, "%s: bad super block", file);
372 if (fs->fs_magic != FS_MAGIC)
373 errx(5, "%s: bad magic number", file);
374 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
386 * Re-open the device read-write. Use the read-only file
387 * descriptor as an interlock to prevent the device from
388 * being mounted while we are switching mode.
391 fi = open(file, O_RDWR);
394 err(3, "cannot open %s", file);
395 bwrite((daddr_t)SBOFF / dev_bsize, (const char *)fs, SBSIZE);
397 for (i = 0; i < fs->fs_ncg; i++)
398 bwrite(fsbtodb(fs, cgsblock(fs, i)),
399 (const char *)fs, SBSIZE);
406 warnx("soft updates: (-n) %s",
407 (sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
408 warnx("maximum contiguous block count: (-a) %d",
409 sblock.fs_maxcontig);
410 warnx("rotational delay between contiguous blocks: (-d) %d ms",
412 warnx("maximum blocks per file in a cylinder group: (-e) %d",
414 warnx("average file size: (-f) %d",
415 sblock.fs_avgfilesize);
416 warnx("average number of files in a directory: (-s) %d",
418 warnx("minimum percentage of free space: (-m) %d%%",
420 warnx("optimization preference: (-o) %s",
421 sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
422 if (sblock.fs_minfree >= MINFREE &&
423 sblock.fs_optim == FS_OPTSPACE)
424 warnx(OPTWARN, "time", ">=", MINFREE);
425 if (sblock.fs_minfree < MINFREE &&
426 sblock.fs_optim == FS_OPTTIME)
427 warnx(OPTWARN, "space", "<", MINFREE);
431 bwrite(blk, buf, size)
437 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
439 if (write(fi, buf, size) != size)
451 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
453 if ((i = read(fi, buf, cnt)) != cnt) {
454 for(i=0; i<sblock.fs_bsize; i++)