sbin/tunefs/tunefs.c

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1983, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)tunefs.c	8.2 (Berkeley) 4/19/94";
#endif
static const char rcsid[] =
  "$FreeBSD: head/sbin/tunefs/tunefs.c 110174 2003-02-01 04:17:10Z gordon $";
#endif /* not lint */

/*
 * tunefs: change layout parameters to an existing file system.
 */
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/disklabel.h>
#include <sys/stat.h>

#include <ufs/ufs/ufsmount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>

#include <ctype.h>
#include <err.h>
#include <fcntl.h>
#include <fstab.h>
#include <libufs.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

/* the optimization warning string template */
#define	OPTWARN	"should optimize for %s with minfree %s %d%%"

struct uufsd disk;
#define	sblock disk.d_fs

void usage(void);
void printfs(void);

int
main(int argc, char *argv[])
{
	const char *special, *on;
	const char *name;
	int Aflag = 0, Lflag = 0, active = 0, aflag = 0;
	int eflag = 0, fflag = 0, lflag = 0, mflag = 0;
	int nflag = 0, oflag = 0, pflag = 0, sflag = 0;
	int evalue = 0, fvalue = 0;
	int mvalue = 0, ovalue = 0, svalue = 0;
	char *Lvalue = NULL, *avalue = NULL, *lvalue = NULL, *nvalue = NULL;
	const char *chg[2];
	struct ufs_args args;
	struct statfs stfs;
	int found_arg, ch, i;

        if (argc < 3)
                usage();
	found_arg = 0; /* at least one arg is required */
	while ((ch = getopt(argc, argv, "AL:a:e:f:l:m:n:o:ps:")) != -1)
	  switch (ch) {
	  case 'A':
		found_arg = 1;
		Aflag++;
		break;
	  case 'L':
		found_arg = 1;
		name = "volume label";
		Lvalue = optarg;
		i = -1;
		while (isalnum(Lvalue[++i]));
		if (Lvalue[i] != '\0') {
			errx(10, "bad %s. Valid characters are alphanumerics.",
			    name);
		}
		if (strlen(Lvalue) >= MAXVOLLEN) {
			errx(10, "bad %s. Length is longer than %d.",
			    name, MAXVOLLEN - 1);
		}
		Lflag = 1;
		break;
	  case 'a':
		found_arg = 1;
		name = "ACLs";
		avalue = optarg;
		if (strcmp(avalue, "enable") && strcmp(avalue, "disable")) {
			errx(10, "bad %s (options are %s)", name,
			    "`enable' or `disable'");
		}
		aflag = 1;
		break;
	  case 'e':
		found_arg = 1;
		name = "maximum blocks per file in a cylinder group";
		evalue = atoi(optarg);
		if (evalue < 1)
			errx(10, "%s must be >= 1 (was %s)", name, optarg);
		eflag = 1;
		break;
	  case 'f':
		found_arg = 1;
		name = "average file size";
		fvalue = atoi(optarg);
		if (fvalue < 1)
			errx(10, "%s must be >= 1 (was %s)", name, optarg);
		fflag = 1;
		break;
	  case 'l':
		found_arg = 1;
		name = "multilabel MAC file system";
		lvalue = optarg;
		if (strcmp(lvalue, "enable") && strcmp(lvalue, "disable")) {
			errx(10, "bad %s (options are %s)", name,
			    "`enable' or `disable'");
		}
		lflag = 1;
		break;
	  case 'm':
		found_arg = 1;
		name = "minimum percentage of free space";
		mvalue = atoi(optarg);
		if (mvalue < 0 || mvalue > 99)
			errx(10, "bad %s (%s)", name, optarg);
		mflag = 1;
		break;
	  case 'n':
		found_arg = 1;
 		name = "soft updates";
 		nvalue = optarg;
                if (strcmp(nvalue, "enable") && strcmp(nvalue, "disable")) {
 			errx(10, "bad %s (options are %s)",
 			    name, "`enable' or `disable'");
 		}
		nflag = 1;
 		break;
	  case 'o':
		found_arg = 1;
		name = "optimization preference";
		chg[FS_OPTSPACE] = "space";
		chg[FS_OPTTIME] = "time";
		if (strcmp(optarg, chg[FS_OPTSPACE]) == 0)
			ovalue = FS_OPTSPACE;
		else if (strcmp(optarg, chg[FS_OPTTIME]) == 0)
			ovalue = FS_OPTTIME;
		else
			errx(10, "bad %s (options are `space' or `time')",
					    name);
		oflag = 1;
		break;
	  case 'p':
		found_arg = 1;
		pflag = 1;
		break;
	  case 's':
		found_arg = 1;
		name = "expected number of files per directory";
		svalue = atoi(optarg);
		if (svalue < 1)
			errx(10, "%s must be >= 1 (was %s)", name, optarg);
		sflag = 1;
		break;
	  default:
		usage();
	  }
	argc -= optind;
	argv += optind;

	if (found_arg == 0 || argc != 1)
	  usage();

	on = special = argv[0];
	if (ufs_disk_fillout(&disk, special) == -1)
		goto err;
	if (disk.d_name != special) {
		special = disk.d_name;
		if (statfs(special, &stfs) == 0 &&
		    strcmp(special, stfs.f_mntonname) == 0)
			active = 1;
	}

	if (pflag) {
		printfs();
		exit(0);
	}
	if (Lflag) {
		name = "volume label";
		strlcpy(sblock.fs_volname, Lvalue, MAXVOLLEN);
	}
	if (aflag) {
		name = "ACLs";
		if (strcmp(avalue, "enable") == 0) {
			if (sblock.fs_flags & FS_ACLS) {
				warnx("%s remains unchanged as enabled", name);
			} else {
				sblock.fs_flags |= FS_ACLS;
				warnx("%s set", name);
			}
		} else if (strcmp(avalue, "disable") == 0) {
			if ((~sblock.fs_flags & FS_ACLS) ==
			    FS_ACLS) {
				warnx("%s remains unchanged as disabled",
				    name);
			} else {
				sblock.fs_flags &= ~FS_ACLS;
				warnx("%s cleared", name);
			}
		}
	}
	if (eflag) {
		name = "maximum blocks per file in a cylinder group";
		if (sblock.fs_maxbpg == evalue) {
			warnx("%s remains unchanged as %d", name, evalue);
		}
		else {
			warnx("%s changes from %d to %d",
					name, sblock.fs_maxbpg, evalue);
			sblock.fs_maxbpg = evalue;
		}
	}
	if (fflag) {
		name = "average file size";
		if (sblock.fs_avgfilesize == fvalue) {
			warnx("%s remains unchanged as %d", name, fvalue);
		}
		else {
			warnx("%s changes from %d to %d",
					name, sblock.fs_avgfilesize, fvalue);
			sblock.fs_avgfilesize = fvalue;
		}
	}
	if (lflag) {
		name = "multilabel";
		if (strcmp(lvalue, "enable") == 0) {
			if (sblock.fs_flags & FS_MULTILABEL) {
				warnx("%s remains unchanged as enabled", name);
			} else {
				sblock.fs_flags |= FS_MULTILABEL;
				warnx("%s set", name);
			}
		} else if (strcmp(lvalue, "disable") == 0) {
			if ((~sblock.fs_flags & FS_MULTILABEL) ==
			    FS_MULTILABEL) {
				warnx("%s remains unchanged as disabled",
				    name);
			} else {
				sblock.fs_flags &= ~FS_MULTILABEL;
				warnx("%s cleared", name);
			}
		}
	}
	if (mflag) {
		name = "minimum percentage of free space";
		if (sblock.fs_minfree == mvalue) {
			warnx("%s remains unchanged as %d%%", name, mvalue);
		}
		else {
			warnx("%s changes from %d%% to %d%%",
				    name, sblock.fs_minfree, mvalue);
			sblock.fs_minfree = mvalue;
			if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE)
				warnx(OPTWARN, "time", ">=", MINFREE);
			if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME)
				warnx(OPTWARN, "space", "<", MINFREE);
		}
	}
	if (nflag) {
 		name = "soft updates";
 		if (strcmp(nvalue, "enable") == 0) {
			if (sblock.fs_flags & FS_DOSOFTDEP) {
				warnx("%s remains unchanged as enabled", name);
			} else if (sblock.fs_clean == 0) {
				warnx("%s cannot be enabled until fsck is run",
				    name);
			} else {
 				sblock.fs_flags |= FS_DOSOFTDEP;
 				warnx("%s set", name);
			}
 		} else if (strcmp(nvalue, "disable") == 0) {
			if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP) {
				warnx("%s remains unchanged as disabled", name);
			} else {
 				sblock.fs_flags &= ~FS_DOSOFTDEP;
 				warnx("%s cleared", name);
			}
 		}
	}
	if (oflag) {
		name = "optimization preference";
		chg[FS_OPTSPACE] = "space";
		chg[FS_OPTTIME] = "time";
		if (sblock.fs_optim == ovalue) {
			warnx("%s remains unchanged as %s", name, chg[ovalue]);
		}
		else {
			warnx("%s changes from %s to %s",
				    name, chg[sblock.fs_optim], chg[ovalue]);
			sblock.fs_optim = ovalue;
			if (sblock.fs_minfree >= MINFREE &&
					ovalue == FS_OPTSPACE)
				warnx(OPTWARN, "time", ">=", MINFREE);
			if (sblock.fs_minfree < MINFREE &&
					ovalue == FS_OPTTIME)
				warnx(OPTWARN, "space", "<", MINFREE);
		}
	}
	if (sflag) {
		name = "expected number of files per directory";
		if (sblock.fs_avgfpdir == svalue) {
			warnx("%s remains unchanged as %d", name, svalue);
		}
		else {
			warnx("%s changes from %d to %d",
					name, sblock.fs_avgfpdir, svalue);
			sblock.fs_avgfpdir = svalue;
		}
	}

	if (sbwrite(&disk, Aflag) == -1)
		goto err;
	ufs_disk_close(&disk);
	if (active) {
		bzero(&args, sizeof(args));
		if (mount("ufs", on,
		    stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
			err(9, "%s: reload", special);
		warnx("file system reloaded");
	}
	exit(0);
err:
	if (disk.d_error != NULL)
		errx(11, "%s: %s", special, disk.d_error);
	else
		err(12, "%s", special);
}

void
usage(void)
{
	fprintf(stderr, "%s\n%s\n%s\n%s\n",
"usage: tunefs [-A] [-L volname] [-a enable | disable] [-e maxbpg]",
"              [-f avgfilesize] [-l enable | disable] [-m minfree]",
"              [-n enable | disable] [-o space | time] [-p]",
"              [-s avgfpdir] special | filesystem");
	exit(2);
}

void
printfs(void)
{
	warnx("ACLs: (-a)                                         %s",
		(sblock.fs_flags & FS_ACLS)? "enabled" : "disabled");
	warnx("MAC multilabel: (-l)                               %s",
		(sblock.fs_flags & FS_MULTILABEL)? "enabled" : "disabled");
	warnx("soft updates: (-n)                                 %s",
		(sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
	warnx("maximum blocks per file in a cylinder group: (-e)  %d",
	      sblock.fs_maxbpg);
	warnx("average file size: (-f)                            %d",
	      sblock.fs_avgfilesize);
	warnx("average number of files in a directory: (-s)       %d",
	      sblock.fs_avgfpdir);
	warnx("minimum percentage of free space: (-m)             %d%%",
	      sblock.fs_minfree);
	warnx("optimization preference: (-o)                      %s",
	      sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
	if (sblock.fs_minfree >= MINFREE &&
	    sblock.fs_optim == FS_OPTSPACE)
		warnx(OPTWARN, "time", ">=", MINFREE);
	if (sblock.fs_minfree < MINFREE &&
	    sblock.fs_optim == FS_OPTTIME)
		warnx(OPTWARN, "space", "<", MINFREE);
	warnx("volume label: (-L)                                 %s",
		sblock.fs_volname);
}