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/ufs/ufsmount.h>
57 #include <ufs/ufs/dinode.h>
58 #include <ufs/ffs/fs.h>
69 /* the optimization warning string template */
70 #define OPTWARN "should optimize for %s with minfree %s %d%%"
76 #define sblock sbun.sb
81 void bwrite(ufs2_daddr_t, const char *, int);
82 int bread(ufs2_daddr_t, char *, int);
83 void getsb(struct fs *, const char *);
84 void putsb(struct fs *, const char *, int);
96 int Aflag = 0, active = 0;
97 int aflag = 0, eflag = 0, fflag = 0, mflag = 0;
98 int nflag = 0, oflag = 0, pflag = 0, sflag = 0;
99 int avalue = 0, evalue = 0, fvalue = 0;
100 int mvalue = 0, ovalue = 0, svalue = 0;
104 char device[MAXPATHLEN];
105 struct ufs_args args;
111 found_arg = 0; /* at least one arg is required */
112 while ((ch = getopt(argc, argv, "Aa:e:f:m:n:o:ps:")) != -1)
120 name = "maximum contiguous block count";
121 avalue = atoi(optarg);
123 errx(10, "%s must be >= 1 (was %s)", name, optarg);
128 name = "maximum blocks per file in a cylinder group";
129 evalue = atoi(optarg);
131 errx(10, "%s must be >= 1 (was %s)", name, optarg);
136 name = "average file size";
137 fvalue = atoi(optarg);
139 errx(10, "%s must be >= 1 (was %s)", name, optarg);
144 name = "minimum percentage of free space";
145 mvalue = atoi(optarg);
146 if (mvalue < 0 || mvalue > 99)
147 errx(10, "bad %s (%s)", name, optarg);
152 name = "soft updates";
154 if (strcmp(nvalue, "enable") && strcmp(nvalue, "disable")) {
155 errx(10, "bad %s (options are %s)",
156 name, "`enable' or `disable'");
162 name = "optimization preference";
163 chg[FS_OPTSPACE] = "space";
164 chg[FS_OPTTIME] = "time";
165 if (strcmp(optarg, chg[FS_OPTSPACE]) == 0)
166 ovalue = FS_OPTSPACE;
167 else if (strcmp(optarg, chg[FS_OPTTIME]) == 0)
170 errx(10, "bad %s (options are `space' or `time')",
180 name = "expected number of files per directory";
181 svalue = atoi(optarg);
183 errx(10, "%s must be >= 1 (was %s)", name, optarg);
192 if (found_arg == 0 || argc != 1)
196 fs = getfsfile(special);
198 if (statfs(special, &stfs) == 0 &&
199 strcmp(special, stfs.f_mntonname) == 0) {
202 special = fs->fs_spec;
205 if (stat(special, &st) < 0) {
206 if (*special != '/') {
209 (void)snprintf(device, sizeof(device), "%s%s",
214 err(1, "%s", special);
216 if (fs == NULL && (st.st_mode & S_IFMT) == S_IFDIR)
217 errx(10, "%s: unknown filesystem", special);
218 getsb(&sblock, special);
225 name = "maximum contiguous block count";
226 if (sblock.fs_maxcontig == avalue) {
227 warnx("%s remains unchanged as %d", name, avalue);
230 warnx("%s changes from %d to %d",
231 name, sblock.fs_maxcontig, avalue);
232 sblock.fs_maxcontig = avalue;
236 name = "maximum blocks per file in a cylinder group";
237 if (sblock.fs_maxbpg == evalue) {
238 warnx("%s remains unchanged as %d", name, evalue);
241 warnx("%s changes from %d to %d",
242 name, sblock.fs_maxbpg, evalue);
243 sblock.fs_maxbpg = evalue;
247 name = "average file size";
248 if (sblock.fs_avgfilesize == fvalue) {
249 warnx("%s remains unchanged as %d", name, fvalue);
252 warnx("%s changes from %d to %d",
253 name, sblock.fs_avgfilesize, fvalue);
254 sblock.fs_avgfilesize = fvalue;
258 name = "minimum percentage of free space";
259 if (sblock.fs_minfree == mvalue) {
260 warnx("%s remains unchanged as %d%%", name, mvalue);
263 warnx("%s changes from %d%% to %d%%",
264 name, sblock.fs_minfree, mvalue);
265 sblock.fs_minfree = mvalue;
266 if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE)
267 warnx(OPTWARN, "time", ">=", MINFREE);
268 if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME)
269 warnx(OPTWARN, "space", "<", MINFREE);
273 name = "soft updates";
274 if (strcmp(nvalue, "enable") == 0) {
275 if (sblock.fs_flags & FS_DOSOFTDEP) {
276 warnx("%s remains unchanged as enabled", name);
277 } else if (sblock.fs_clean == 0) {
278 warnx("%s cannot be enabled until fsck is run",
281 sblock.fs_flags |= FS_DOSOFTDEP;
282 warnx("%s set", name);
284 } else if (strcmp(nvalue, "disable") == 0) {
285 if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP) {
286 warnx("%s remains unchanged as disabled", name);
288 sblock.fs_flags &= ~FS_DOSOFTDEP;
289 warnx("%s cleared", name);
294 name = "optimization preference";
295 chg[FS_OPTSPACE] = "space";
296 chg[FS_OPTTIME] = "time";
297 if (sblock.fs_optim == ovalue) {
298 warnx("%s remains unchanged as %s", name, chg[ovalue]);
301 warnx("%s changes from %s to %s",
302 name, chg[sblock.fs_optim], chg[ovalue]);
303 sblock.fs_optim = ovalue;
304 if (sblock.fs_minfree >= MINFREE &&
305 ovalue == FS_OPTSPACE)
306 warnx(OPTWARN, "time", ">=", MINFREE);
307 if (sblock.fs_minfree < MINFREE &&
308 ovalue == FS_OPTTIME)
309 warnx(OPTWARN, "space", "<", MINFREE);
313 name = "expected number of files per directory";
314 if (sblock.fs_avgfpdir == svalue) {
315 warnx("%s remains unchanged as %d", name, svalue);
318 warnx("%s changes from %d to %d",
319 name, sblock.fs_avgfpdir, svalue);
320 sblock.fs_avgfpdir = svalue;
324 putsb(&sblock, special, Aflag);
326 bzero(&args, sizeof(args));
327 if (mount("ufs", fs->fs_file,
328 stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
329 err(9, "%s: reload", special);
330 warnx("filesystem reloaded");
338 fprintf(stderr, "%s\n%s\n%s\n",
339 "usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
340 " [-m minfree] [-p] [-n enable | disable] [-o space | time]",
341 " [-s filesperdir] special | filesystem");
346 * Possible superblock locations ordered from most to least likely.
348 static int sblock_try[] = SBLOCKSEARCH;
349 static ufs2_daddr_t sblockloc;
358 fi = open(file, O_RDONLY);
360 err(3, "cannot open %s", file);
361 for (i = 0; sblock_try[i] != -1; i++) {
362 if (bread(sblock_try[i], (char *)fs, SBLOCKSIZE))
363 err(4, "%s: bad super block", file);
364 if ((fs->fs_magic == FS_UFS1_MAGIC ||
365 (fs->fs_magic == FS_UFS2_MAGIC &&
366 fs->fs_sblockloc == numfrags(fs, sblock_try[i]))) &&
367 fs->fs_bsize <= MAXBSIZE &&
368 fs->fs_bsize >= sizeof(struct fs))
371 if (sblock_try[i] == -1)
372 err(5, "Cannot find filesystem superblock");
373 dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
374 sblockloc = sblock_try[i] / dev_bsize;
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(sblockloc, (const char *)fs, SBLOCKSIZE);
397 for (i = 0; i < fs->fs_ncg; i++)
398 bwrite(fsbtodb(fs, cgsblock(fs, i)),
399 (const char *)fs, SBLOCKSIZE);
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("maximum blocks per file in a cylinder group: (-e) %d",
412 warnx("average file size: (-f) %d",
413 sblock.fs_avgfilesize);
414 warnx("average number of files in a directory: (-s) %d",
416 warnx("minimum percentage of free space: (-m) %d%%",
418 warnx("optimization preference: (-o) %s",
419 sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
420 if (sblock.fs_minfree >= MINFREE &&
421 sblock.fs_optim == FS_OPTSPACE)
422 warnx(OPTWARN, "time", ">=", MINFREE);
423 if (sblock.fs_minfree < MINFREE &&
424 sblock.fs_optim == FS_OPTTIME)
425 warnx(OPTWARN, "space", "<", MINFREE);
429 bwrite(blk, buf, size)
435 if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
437 if (write(fi, buf, size) != size)
449 if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
451 if ((i = read(fi, buf, cnt)) != cnt) {
452 for(i=0; i<sblock.fs_bsize; i++)