1c2665d807
Because the kernel will allow the mounting of unclean filesystems when the soft updates flag is set, it is important that only soft updates style inconsistencies (missing blocks and inodes) be present. Otherwise a panic may ensue. It is also important that the filesystem be in a clean state when the soft updates flag is set because the background fsck uses the fact that the flag is set to indicate that it is safe to run. If background fsck encounters non-soft updates style inconsistencies, it will exit with unexpected inconsistencies.
457 lines
12 KiB
C
457 lines
12 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tunefs.c 8.2 (Berkeley) 4/19/94";
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#endif
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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/*
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* tunefs: change layout parameters to an existing file system.
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*/
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/ufsmount.h>
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#include <err.h>
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#include <fcntl.h>
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#include <fstab.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* the optimization warning string template */
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#define OPTWARN "should optimize for %s with minfree %s %d%%"
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union {
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struct fs sb;
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char pad[MAXBSIZE];
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} sbun;
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#define sblock sbun.sb
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int fi;
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long dev_bsize = 1;
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void bwrite __P((daddr_t, char *, int));
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int bread __P((daddr_t, char *, int));
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void getsb __P((struct fs *, char *));
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void putsb __P((struct fs *, char *, int));
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void usage __P((void));
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void printfs __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char *special, *name;
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struct stat st;
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int Aflag = 0, active = 0;
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int aflag = 0, dflag = 0, eflag = 0, fflag = 0, mflag = 0;
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int nflag = 0, oflag = 0, pflag = 0, sflag = 0;
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int avalue = 0, dvalue = 0, evalue = 0, fvalue = 0;
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int mvalue = 0, ovalue = 0, svalue = 0;
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char *nvalue = NULL;
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struct fstab *fs;
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char *chg[2], device[MAXPATHLEN];
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struct ufs_args args;
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struct statfs stfs;
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int found_arg, ch;
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if (argc < 3)
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usage();
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found_arg = 0; /* at least one arg is required */
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while ((ch = getopt(argc, argv, "Aa:d:e:f:m:n:o:ps:")) != -1)
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switch (ch) {
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case 'A':
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found_arg = 1;
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Aflag++;
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break;
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case 'a':
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found_arg = 1;
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name = "maximum contiguous block count";
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avalue = atoi(optarg);
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if (avalue < 1)
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errx(10, "%s must be >= 1 (was %s)", name, optarg);
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aflag = 1;
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break;
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case 'd':
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found_arg = 1;
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name = "rotational delay between contiguous blocks";
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dvalue = atoi(optarg);
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dflag = 1;
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break;
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case 'e':
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found_arg = 1;
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name = "maximum blocks per file in a cylinder group";
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evalue = atoi(optarg);
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if (evalue < 1)
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errx(10, "%s must be >= 1 (was %s)", name, optarg);
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eflag = 1;
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break;
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case 'f':
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found_arg = 1;
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name = "average file size";
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fvalue = atoi(optarg);
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if (fvalue < 1)
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errx(10, "%s must be >= 1 (was %s)", name, optarg);
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fflag = 1;
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break;
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case 'm':
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found_arg = 1;
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name = "minimum percentage of free space";
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mvalue = atoi(optarg);
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if (mvalue < 0 || mvalue > 99)
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errx(10, "bad %s (%s)", name, optarg);
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mflag = 1;
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break;
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case 'n':
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found_arg = 1;
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name = "soft updates";
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nvalue = optarg;
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if (strcmp(nvalue, "enable") && strcmp(nvalue, "disable")) {
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errx(10, "bad %s (options are %s)",
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name, "`enable' or `disable'");
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}
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nflag = 1;
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break;
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case 'o':
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found_arg = 1;
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name = "optimization preference";
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chg[FS_OPTSPACE] = "space";
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chg[FS_OPTTIME] = "time";
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if (strcmp(optarg, chg[FS_OPTSPACE]) == 0)
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ovalue = FS_OPTSPACE;
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else if (strcmp(optarg, chg[FS_OPTTIME]) == 0)
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ovalue = FS_OPTTIME;
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else
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errx(10, "bad %s (options are `space' or `time')",
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name);
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oflag = 1;
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break;
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case 'p':
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found_arg = 1;
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pflag = 1;
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break;
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case 's':
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found_arg = 1;
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name = "expected number of files per directory";
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svalue = atoi(optarg);
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if (svalue < 1)
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errx(10, "%s must be >= 1 (was %s)", name, optarg);
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sflag = 1;
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (found_arg == 0 || argc != 1)
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usage();
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special = argv[0];
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fs = getfsfile(special);
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if (fs) {
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if (statfs(special, &stfs) == 0 &&
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strcmp(special, stfs.f_mntonname) == 0) {
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active = 1;
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}
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special = fs->fs_spec;
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}
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again:
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if (stat(special, &st) < 0) {
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if (*special != '/') {
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if (*special == 'r')
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special++;
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(void)sprintf(device, "%s/%s", _PATH_DEV, special);
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special = device;
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goto again;
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}
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err(1, "%s", special);
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}
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if ((st.st_mode & S_IFMT) != S_IFBLK &&
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(st.st_mode & S_IFMT) != S_IFCHR)
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errx(10, "%s: not a block or character device", special);
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getsb(&sblock, special);
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if (pflag) {
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printfs();
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exit(0);
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}
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if (aflag) {
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name = "maximum contiguous block count";
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if (sblock.fs_maxcontig == avalue) {
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warnx("%s remains unchanged as %d", name, avalue);
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}
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else {
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warnx("%s changes from %d to %d",
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name, sblock.fs_maxcontig, avalue);
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sblock.fs_maxcontig = avalue;
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}
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}
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if (dflag) {
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name = "rotational delay between contiguous blocks";
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if (sblock.fs_rotdelay == dvalue) {
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warnx("%s remains unchanged as %dms", name, dvalue);
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}
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else {
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warnx("%s changes from %dms to %dms",
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name, sblock.fs_rotdelay, dvalue);
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sblock.fs_rotdelay = dvalue;
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}
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}
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if (eflag) {
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name = "maximum blocks per file in a cylinder group";
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if (sblock.fs_maxbpg == evalue) {
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warnx("%s remains unchanged as %d", name, evalue);
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}
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else {
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warnx("%s changes from %d to %d",
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name, sblock.fs_maxbpg, evalue);
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sblock.fs_maxbpg = evalue;
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}
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}
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if (fflag) {
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name = "average file size";
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if (sblock.fs_avgfilesize == fvalue) {
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warnx("%s remains unchanged as %d", name, fvalue);
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}
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else {
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warnx("%s changes from %d to %d",
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name, sblock.fs_avgfilesize, fvalue);
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sblock.fs_avgfilesize = fvalue;
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}
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}
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if (mflag) {
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name = "minimum percentage of free space";
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if (sblock.fs_minfree == mvalue) {
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warnx("%s remains unchanged as %d%%", name, mvalue);
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}
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else {
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warnx("%s changes from %d%% to %d%%",
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name, sblock.fs_minfree, mvalue);
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sblock.fs_minfree = mvalue;
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if (mvalue >= MINFREE && sblock.fs_optim == FS_OPTSPACE)
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warnx(OPTWARN, "time", ">=", MINFREE);
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if (mvalue < MINFREE && sblock.fs_optim == FS_OPTTIME)
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warnx(OPTWARN, "space", "<", MINFREE);
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}
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}
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if (nflag) {
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name = "soft updates";
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if (strcmp(nvalue, "enable") == 0) {
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if (sblock.fs_flags & FS_DOSOFTDEP) {
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warnx("%s remains unchanged as enabled", name);
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} else if (sblock.fs_clean == 0) {
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warnx("%s cannot be enabled until fsck is run",
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name);
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} else {
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sblock.fs_flags |= FS_DOSOFTDEP;
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warnx("%s set", name);
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}
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} else if (strcmp(nvalue, "disable") == 0) {
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if ((~sblock.fs_flags & FS_DOSOFTDEP) == FS_DOSOFTDEP) {
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warnx("%s remains unchanged as disabled", name);
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} else {
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sblock.fs_flags &= ~FS_DOSOFTDEP;
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warnx("%s cleared", name);
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}
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}
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}
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if (oflag) {
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name = "optimization preference";
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chg[FS_OPTSPACE] = "space";
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chg[FS_OPTTIME] = "time";
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if (sblock.fs_optim == ovalue) {
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warnx("%s remains unchanged as %s", name, chg[ovalue]);
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}
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else {
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warnx("%s changes from %s to %s",
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name, chg[sblock.fs_optim], chg[ovalue]);
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sblock.fs_optim = ovalue;
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if (sblock.fs_minfree >= MINFREE &&
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ovalue == FS_OPTSPACE)
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warnx(OPTWARN, "time", ">=", MINFREE);
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if (sblock.fs_minfree < MINFREE &&
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ovalue == FS_OPTTIME)
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warnx(OPTWARN, "space", "<", MINFREE);
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}
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}
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if (sflag) {
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name = "expected number of files per directory";
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if (sblock.fs_avgfpdir == svalue) {
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warnx("%s remains unchanged as %d", name, svalue);
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}
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else {
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warnx("%s changes from %d to %d",
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name, sblock.fs_avgfpdir, svalue);
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sblock.fs_avgfpdir = svalue;
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}
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}
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putsb(&sblock, special, Aflag);
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if (active) {
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bzero(&args, sizeof(args));
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if (mount("ufs", fs->fs_file,
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stfs.f_flags | MNT_UPDATE | MNT_RELOAD, &args) < 0)
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err(9, "%s: reload", special);
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warnx("file system reloaded");
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}
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exit(0);
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}
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void
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usage()
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{
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fprintf(stderr, "%s\n%s\n%s\n",
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"usage: tunefs [-A] [-a maxcontig] [-d rotdelay] [-e maxbpg] [-f avgfilesize]",
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" [-m minfree] [-p] [-n enable | disable] [-o space | time]",
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" [-s filesperdir] special | filesystem");
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exit(2);
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}
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void
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getsb(fs, file)
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register struct fs *fs;
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char *file;
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{
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fi = open(file, O_RDONLY);
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if (fi < 0)
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err(3, "cannot open %s", file);
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if (bread((daddr_t)SBOFF, (char *)fs, SBSIZE))
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err(4, "%s: bad super block", file);
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if (fs->fs_magic != FS_MAGIC)
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err(5, "%s: bad magic number", file);
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dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
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}
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void
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putsb(fs, file, all)
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register struct fs *fs;
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char *file;
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int all;
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{
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int i;
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/*
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* Re-open the device read-write. Use the read-only file
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* descriptor as an interlock to prevent the device from
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* being mounted while we are switching mode.
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*/
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i = fi;
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fi = open(file, O_RDWR);
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close(i);
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if (fi < 0)
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err(3, "cannot open %s", file);
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bwrite((daddr_t)SBOFF / dev_bsize, (char *)fs, SBSIZE);
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if (all)
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for (i = 0; i < fs->fs_ncg; i++)
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bwrite(fsbtodb(fs, cgsblock(fs, i)),
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(char *)fs, SBSIZE);
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close(fi);
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}
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void
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printfs()
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{
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warnx("soft updates: (-n) %s",
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(sblock.fs_flags & FS_DOSOFTDEP)? "enabled" : "disabled");
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warnx("maximum contiguous block count: (-a) %d",
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sblock.fs_maxcontig);
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warnx("rotational delay between contiguous blocks: (-d) %d ms",
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sblock.fs_rotdelay);
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warnx("maximum blocks per file in a cylinder group: (-e) %d",
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sblock.fs_maxbpg);
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warnx("average file size: (-f) %d",
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sblock.fs_avgfilesize);
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warnx("average number of files in a directory: (-s) %d",
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sblock.fs_avgfpdir);
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warnx("minimum percentage of free space: (-m) %d%%",
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sblock.fs_minfree);
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warnx("optimization preference: (-o) %s",
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sblock.fs_optim == FS_OPTSPACE ? "space" : "time");
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if (sblock.fs_minfree >= MINFREE &&
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sblock.fs_optim == FS_OPTSPACE)
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warnx(OPTWARN, "time", ">=", MINFREE);
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if (sblock.fs_minfree < MINFREE &&
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sblock.fs_optim == FS_OPTTIME)
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warnx(OPTWARN, "space", "<", MINFREE);
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}
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void
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bwrite(blk, buf, size)
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daddr_t blk;
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char *buf;
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int size;
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{
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if (lseek(fi, (off_t)blk * dev_bsize, SEEK_SET) < 0)
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err(6, "FS SEEK");
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if (write(fi, buf, size) != size)
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err(7, "FS WRITE");
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}
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int
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bread(bno, buf, cnt)
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daddr_t bno;
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char *buf;
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int cnt;
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{
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int i;
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if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0)
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return(1);
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if ((i = read(fi, buf, cnt)) != cnt) {
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for(i=0; i<sblock.fs_bsize; i++)
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buf[i] = 0;
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return (1);
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}
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return (0);
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}
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