tunefs.c revision 163842 
1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if 0
31#ifndef lint
32static const char copyright[] =
33"@(#) Copyright (c) 1983, 1993\n\
34	The Regents of the University of California.  All rights reserved.\n";
35#endif /* not lint */
36
37#ifndef lint
38static char sccsid[] = "@(#)tunefs.c	8.2 (Berkeley) 4/19/94";
39#endif /* not lint */
40#endif
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: head/sbin/tunefs/tunefs.c 163842 2006-10-31 21:52:28Z pjd $");
43
44/*
45 * tunefs: change layout parameters to an existing file system.
46 */
47#include <sys/param.h>
48#include <sys/mount.h>
49#include <sys/disklabel.h>
50#include <sys/stat.h>
51
52#include <ufs/ufs/ufsmount.h>
53#include <ufs/ufs/dinode.h>
54#include <ufs/ffs/fs.h>
55
56#include <ctype.h>
57#include <err.h>
58#include <fcntl.h>
59#include <fstab.h>
60#include <libufs.h>
61#include <paths.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <unistd.h>
66
67/* the optimization warning string template */
68#define	OPTWARN	"should optimize for %s with minfree %s %d%%"
69
70struct uufsd disk;
71#define	sblock disk.d_fs
72
73void usage(void);
74void printfs(void);
75
76int
77main(int argc, char *argv[])
78{
79	char *avalue, *Jvalue, *Lvalue, *lvalue, *nvalue;
80	const char *special, *on;
81	const char *name;
82	int active;
83	int Aflag, aflag, eflag, evalue, fflag, fvalue, Jflag, Lflag, lflag;
84	int mflag, mvalue, nflag, oflag, ovalue, pflag, sflag, svalue;
85	int ch, found_arg, i;
86	const char *chg[2];
87	struct ufs_args args;
88	struct statfs stfs;
89
90	if (argc < 3)
91		usage();
92	Aflag = aflag = eflag = fflag = Jflag = Lflag = lflag = mflag = 0;
93	nflag = oflag = pflag = sflag = 0;
94	avalue = Jvalue = Lvalue = lvalue = nvalue = NULL;
95	evalue = fvalue = mvalue = ovalue = svalue = 0;
96	active = 0;
97	found_arg = 0;		/* At least one arg is required. */
98	while ((ch = getopt(argc, argv, "Aa:e:f:J:L:l:m:n:o:ps:")) != -1)
99		switch (ch) {
100
101		case 'A':
102			found_arg = 1;
103			Aflag++;
104			break;
105
106		case 'a':
107			found_arg = 1;
108			name = "ACLs";
109			avalue = optarg;
110			if (strcmp(avalue, "enable") &&
111			    strcmp(avalue, "disable")) {
112				errx(10, "bad %s (options are %s)",
113				    name, "`enable' or `disable'");
114			}
115			aflag = 1;
116			break;
117
118		case 'e':
119			found_arg = 1;
120			name = "maximum blocks per file in a cylinder group";
121			evalue = atoi(optarg);
122			if (evalue < 1)
123				errx(10, "%s must be >= 1 (was %s)",
124				    name, optarg);
125			eflag = 1;
126			break;
127
128		case 'f':
129			found_arg = 1;
130			name = "average file size";
131			fvalue = atoi(optarg);
132			if (fvalue < 1)
133				errx(10, "%s must be >= 1 (was %s)",
134				    name, optarg);
135			fflag = 1;
136			break;
137
138		case 'J':
139			found_arg = 1;
140			name = "gjournaled file system";
141			Jvalue = optarg;
142			if (strcmp(Jvalue, "enable") &&
143			    strcmp(Jvalue, "disable")) {
144				errx(10, "bad %s (options are %s)",
145				    name, "`enable' or `disable'");
146			}
147			Jflag = 1;
148			break;
149
150
151		case 'L':
152			found_arg = 1;
153			name = "volume label";
154			Lvalue = optarg;
155			i = -1;
156			while (isalnum(Lvalue[++i]));
157			if (Lvalue[i] != '\0') {
158				errx(10,
159				"bad %s. Valid characters are alphanumerics.",
160				    name);
161			}
162			if (strlen(Lvalue) >= MAXVOLLEN) {
163				errx(10, "bad %s. Length is longer than %d.",
164				    name, MAXVOLLEN - 1);
165			}
166			Lflag = 1;
167			break;
168
169		case 'l':
170			found_arg = 1;
171			name = "multilabel MAC file system";
172			lvalue = optarg;
173			if (strcmp(lvalue, "enable") &&
174			    strcmp(lvalue, "disable")) {
175				errx(10, "bad %s (options are %s)",
176				    name, "`enable' or `disable'");
177			}
178			lflag = 1;
179			break;
180
181		case 'm':
182			found_arg = 1;
183			name = "minimum percentage of free space";
184			mvalue = atoi(optarg);
185			if (mvalue < 0 || mvalue > 99)
186				errx(10, "bad %s (%s)", name, optarg);
187			mflag = 1;
188			break;
189
190		case 'n':
191			found_arg = 1;
192			name = "soft updates";
193			nvalue = optarg;
194			if (strcmp(nvalue, "enable") != 0 &&
195			    strcmp(nvalue, "disable") != 0) {
196				errx(10, "bad %s (options are %s)",
197				    name, "`enable' or `disable'");
198			}
199			nflag = 1;
200			break;
201
202		case 'o':
203			found_arg = 1;
204			name = "optimization preference";
205			if (strcmp(optarg, "space") == 0)
206				ovalue = FS_OPTSPACE;
207			else if (strcmp(optarg, "time") == 0)
208				ovalue = FS_OPTTIME;
209			else
210				errx(10,
211				    "bad %s (options are `space' or `time')",
212				    name);
213			oflag = 1;
214			break;
215
216		case 'p':
217			found_arg = 1;
218			pflag = 1;
219			break;
220
221		case 's':
222			found_arg = 1;
223			name = "expected number of files per directory";
224			svalue = atoi(optarg);
225			if (svalue < 1)
226				errx(10, "%s must be >= 1 (was %s)",
227				    name, optarg);
228			sflag = 1;
229			break;
230
231		default:
232			usage();
233		}
234	argc -= optind;
235	argv += optind;
236	if (found_arg == 0 || argc != 1)
237		usage();
238
239	on = special = argv[0];
240	if (ufs_disk_fillout(&disk, special) == -1)
241		goto err;
242	if (disk.d_name != special) {
243		special = disk.d_name;
244		if (statfs(special, &stfs) == 0 &&
245		    strcmp(special, stfs.f_mntonname) == 0)
246			active = 1;
247	}
248
249	if (pflag) {
250		printfs();
251		exit(0);
252	}
253	if (Lflag) {
254		name = "volume label";
255		strlcpy(sblock.fs_volname, Lvalue, MAXVOLLEN);
256	}
257	if (aflag) {
258		name = "ACLs";
259		if (strcmp(avalue, "enable") == 0) {
260			if (sblock.fs_flags & FS_ACLS) {
261				warnx("%s remains unchanged as enabled", name);
262			} else {
263				sblock.fs_flags |= FS_ACLS;
264				warnx("%s set", name);
265			}
266		} else if (strcmp(avalue, "disable") == 0) {
267			if ((~sblock.fs_flags & FS_ACLS) ==
268			    FS_ACLS) {
269				warnx("%s remains unchanged as disabled",
270				    name);
271			} else {
272				sblock.fs_flags &= ~FS_ACLS;
273				warnx("%s cleared", name);
274			}
275		}
276	}
277	if (eflag) {
278		name = "maximum blocks per file in a cylinder group";
279		if (sblock.fs_maxbpg == evalue)
280			warnx("%s remains unchanged as %d", name, evalue);
281		else {
282			warnx("%s changes from %d to %d",
283			    name, sblock.fs_maxbpg, evalue);
284			sblock.fs_maxbpg = evalue;
285		}
286	}
287	if (fflag) {
288		name = "average file size";
289		if (sblock.fs_avgfilesize == fvalue) {
290			warnx("%s remains unchanged as %d", name, fvalue);
291		}
292		else {
293			warnx("%s changes from %d to %d",
294					name, sblock.fs_avgfilesize, fvalue);
295			sblock.fs_avgfilesize = fvalue;
296		}
297	}
298	if (Jflag) {
299		name = "gjournal";
300		if (strcmp(Jvalue, "enable") == 0) {
301			if (sblock.fs_flags & FS_GJOURNAL) {
302				warnx("%s remains unchanged as enabled", name);
303			} else {
304				sblock.fs_flags |= FS_GJOURNAL;
305				warnx("%s set", name);
306			}
307		} else if (strcmp(Jvalue, "disable") == 0) {
308			if ((~sblock.fs_flags & FS_GJOURNAL) ==
309			    FS_GJOURNAL) {
310				warnx("%s remains unchanged as disabled",
311				    name);
312			} else {
313				sblock.fs_flags &= ~FS_GJOURNAL;
314				warnx("%s cleared", name);
315			}
316		}
317	}
318	if (lflag) {
319		name = "multilabel";
320		if (strcmp(lvalue, "enable") == 0) {
321			if (sblock.fs_flags & FS_MULTILABEL) {
322				warnx("%s remains unchanged as enabled", name);
323			} else {
324				sblock.fs_flags |= FS_MULTILABEL;
325				warnx("%s set", name);
326			}
327		} else if (strcmp(lvalue, "disable") == 0) {
328			if ((~sblock.fs_flags & FS_MULTILABEL) ==
329			    FS_MULTILABEL) {
330				warnx("%s remains unchanged as disabled",
331				    name);
332			} else {
333				sblock.fs_flags &= ~FS_MULTILABEL;
334				warnx("%s cleared", name);
335			}
336		}
337	}
338	if (mflag) {
339		name = "minimum percentage of free space";
340		if (sblock.fs_minfree == mvalue)
341			warnx("%s remains unchanged as %d%%", name, mvalue);
342		else {
343			warnx("%s changes from %d%% to %d%%",
344				    name, sblock.fs_minfree, mvalue);
345			sblock.fs_minfree = mvalue;
346			if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE)
347				warnx(OPTWARN, "time", ">=", MINFREE);
348			if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME)
349				warnx(OPTWARN, "space", "<", MINFREE);
350		}
351	}
352	if (nflag) {
353 		name = "soft updates";
354 		if (strcmp(nvalue, "enable") == 0) {
355			if (sblock.fs_flags & FS_DOSOFTDEP)
356				warnx("%s remains unchanged as enabled", name);
357			else if (sblock.fs_clean == 0) {
358				warnx("%s cannot be enabled until fsck is run",
359				    name);
360			} else {
361 				sblock.fs_flags |= FS_DOSOFTDEP;
362 				warnx("%s set", name);
363			}
364 		} else if (strcmp(nvalue, "disable") == 0) {
365			if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP)
366				warnx("%s remains unchanged as disabled", name);
367			else {
368 				sblock.fs_flags &= ~FS_DOSOFTDEP;
369 				warnx("%s cleared", name);
370			}
371 		}
372	}
373	if (oflag) {
374		name = "optimization preference";
375		chg[FS_OPTSPACE] = "space";
376		chg[FS_OPTTIME] = "time";
377		if (sblock.fs_optim == ovalue)
378			warnx("%s remains unchanged as %s", name, chg[ovalue]);
379		else {
380			warnx("%s changes from %s to %s",
381				    name, chg[sblock.fs_optim], chg[ovalue]);
382			sblock.fs_optim = ovalue;
383			if (sblock.fs_minfree >= MINFREE &&
384			    ovalue == FS_OPTSPACE)
385				warnx(OPTWARN, "time", ">=", MINFREE);
386			if (sblock.fs_minfree < MINFREE && ovalue == FS_OPTTIME)
387				warnx(OPTWARN, "space", "<", MINFREE);
388		}
389	}
390	if (sflag) {
391		name = "expected number of files per directory";
392		if (sblock.fs_avgfpdir == svalue) {
393			warnx("%s remains unchanged as %d", name, svalue);
394		}
395		else {
396			warnx("%s changes from %d to %d",
397					name, sblock.fs_avgfpdir, svalue);
398			sblock.fs_avgfpdir = svalue;
399		}
400	}
401
402	if (sbwrite(&disk, Aflag) == -1)
403		goto err;
404	ufs_disk_close(&disk);
405	if (active) {
406		bzero(&args, sizeof(args));
407		if (mount("ufs", on,
408		    stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
409			err(9, "%s: reload", special);
410		warnx("file system reloaded");
411	}
412	exit(0);
413err:
414	if (disk.d_error != NULL)
415		errx(11, "%s: %s", special, disk.d_error);
416	else
417		err(12, "%s", special);
418}
419
420void
421usage(void)
422{
423	fprintf(stderr, "%s\n%s\n%s\n%s\n",
424"usage: tunefs [-A] [-a enable | disable] [-e maxbpg] [-f avgfilesize]",
425"              [-J enable | disable ] [-L volname] [-l enable | disable]",
426"              [-m minfree] [-n enable | disable] [-o space | time] [-p]",
427"              [-s avgfpdir] special | filesystem");
428	exit(2);
429}
430
431void
432printfs(void)
433{
434	warnx("ACLs: (-a)                                         %s",
435		(sblock.fs_flags & FS_ACLS)? "enabled" : "disabled");
436	warnx("MAC multilabel: (-l)                               %s",
437		(sblock.fs_flags & FS_MULTILABEL)? "enabled" : "disabled");
438	warnx("soft updates: (-n)                                 %s",
439		(sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
440	warnx("gjournal: (-J)                                     %s",
441		(sblock.fs_flags & FS_GJOURNAL)? "enabled" : "disabled");
442	warnx("maximum blocks per file in a cylinder group: (-e)  %d",
443	      sblock.fs_maxbpg);
444	warnx("average file size: (-f)                            %d",
445	      sblock.fs_avgfilesize);
446	warnx("average number of files in a directory: (-s)       %d",
447	      sblock.fs_avgfpdir);
448	warnx("minimum percentage of free space: (-m)             %d%%",
449	      sblock.fs_minfree);
450	warnx("optimization preference: (-o)                      %s",
451	      sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
452	if (sblock.fs_minfree >= MINFREE &&
453	    sblock.fs_optim == FS_OPTSPACE)
454		warnx(OPTWARN, "time", ">=", MINFREE);
455	if (sblock.fs_minfree < MINFREE &&
456	    sblock.fs_optim == FS_OPTTIME)
457		warnx(OPTWARN, "space", "<", MINFREE);
458	warnx("volume label: (-L)                                 %s",
459		sblock.fs_volname);
460}
461