416 lines
11 KiB
C
416 lines
11 KiB
C
/* $NetBSD: tunefs.c,v 1.27 2003/04/02 10:39:32 fvdl Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__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 8.3 (Berkeley) 5/3/95";
|
|
#else
|
|
__RCSID("$NetBSD: tunefs.c,v 1.27 2003/04/02 10:39:32 fvdl Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* tunefs: change layout parameters to an existing file system.
|
|
*/
|
|
#include <sys/param.h>
|
|
|
|
#include <ufs/ufs/dinode.h>
|
|
#include <ufs/ffs/fs.h>
|
|
#include <ufs/ffs/ffs_extern.h>
|
|
|
|
#include <machine/bswap.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <fstab.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <util.h>
|
|
|
|
/* the optimization warning string template */
|
|
#define OPTWARN "should optimize for %s with minfree %s %d%%"
|
|
|
|
union {
|
|
struct fs sb;
|
|
char pad[MAXBSIZE];
|
|
} sbun;
|
|
#define sblock sbun.sb
|
|
char buf[MAXBSIZE];
|
|
|
|
int fi;
|
|
long dev_bsize = 512;
|
|
int needswap = 0;
|
|
int is_ufs2 = 0;
|
|
off_t sblockloc;
|
|
|
|
static off_t sblock_try[] = SBLOCKSEARCH;
|
|
|
|
static void bwrite(daddr_t, char *, int, const char *);
|
|
static void bread(daddr_t, char *, int, const char *);
|
|
static int getnum(const char *, const char *, int, int);
|
|
static void getsb(struct fs *, const char *);
|
|
static int openpartition(const char *, int, char *, size_t);
|
|
static void usage(void);
|
|
int main(int, char *[]);
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
#define OPTSTRINGBASE "AFNe:g:h:m:o:"
|
|
#ifdef TUNEFS_SOFTDEP
|
|
int softdep;
|
|
#define OPTSTRING OPTSTRINGBASE ## "n:"
|
|
#else
|
|
#define OPTSTRING OPTSTRINGBASE
|
|
#endif
|
|
int i, ch, Aflag, Fflag, Nflag, openflags;
|
|
const char *special, *chg[2];
|
|
char device[MAXPATHLEN];
|
|
int maxbpg, minfree, optim;
|
|
int avgfilesize, avgfpdir;
|
|
|
|
Aflag = Fflag = Nflag = 0;
|
|
maxbpg = minfree = optim = -1;
|
|
avgfilesize = avgfpdir = -1;
|
|
#ifdef TUNEFS_SOFTDEP
|
|
softdep = -1;
|
|
#endif
|
|
chg[FS_OPTSPACE] = "space";
|
|
chg[FS_OPTTIME] = "time";
|
|
|
|
while ((ch = getopt(argc, argv, OPTSTRING)) != -1) {
|
|
switch (ch) {
|
|
|
|
case 'A':
|
|
Aflag++;
|
|
break;
|
|
|
|
case 'F':
|
|
Fflag++;
|
|
break;
|
|
|
|
case 'N':
|
|
Nflag++;
|
|
break;
|
|
|
|
case 'e':
|
|
maxbpg = getnum(optarg,
|
|
"maximum blocks per file in a cylinder group",
|
|
1, INT_MAX);
|
|
break;
|
|
|
|
case 'g':
|
|
avgfilesize = getnum(optarg,
|
|
"average file size", 1, INT_MAX);
|
|
break;
|
|
|
|
case 'h':
|
|
avgfpdir = getnum(optarg,
|
|
"expected number of files per directory",
|
|
1, INT_MAX);
|
|
break;
|
|
|
|
case 'm':
|
|
minfree = getnum(optarg,
|
|
"minimum percentage of free space", 0, 99);
|
|
break;
|
|
|
|
#ifdef TUNEFS_SOFTDEP
|
|
case 'n':
|
|
if (strcmp(optarg, "enable") == 0)
|
|
softdep = 1;
|
|
else if (strcmp(optarg, "disable") == 0)
|
|
softdep = 0;
|
|
else {
|
|
errx(10, "bad soft dependencies "
|
|
"(options are `enable' or `disable')");
|
|
}
|
|
break;
|
|
#endif
|
|
|
|
case 'o':
|
|
if (strcmp(optarg, chg[FS_OPTSPACE]) == 0)
|
|
optim = FS_OPTSPACE;
|
|
else if (strcmp(optarg, chg[FS_OPTTIME]) == 0)
|
|
optim = FS_OPTTIME;
|
|
else
|
|
errx(10,
|
|
"bad %s (options are `space' or `time')",
|
|
"optimization preference");
|
|
break;
|
|
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc != 1)
|
|
usage();
|
|
|
|
special = argv[0];
|
|
openflags = Nflag ? O_RDONLY : O_RDWR;
|
|
if (Fflag)
|
|
fi = open(special, openflags);
|
|
else {
|
|
fi = openpartition(special, openflags, device, sizeof(device));
|
|
special = device;
|
|
}
|
|
if (fi == -1)
|
|
err(1, "%s", special);
|
|
getsb(&sblock, special);
|
|
|
|
#define CHANGEVAL(old, new, type, suffix) do \
|
|
if ((new) != -1) { \
|
|
if ((new) == (old)) \
|
|
warnx("%s remains unchanged at %d%s", \
|
|
(type), (old), (suffix)); \
|
|
else { \
|
|
warnx("%s changes from %d%s to %d%s", \
|
|
(type), (old), (suffix), (new), (suffix)); \
|
|
(old) = (new); \
|
|
} \
|
|
} while (/* CONSTCOND */0)
|
|
|
|
warnx("tuning %s", special);
|
|
CHANGEVAL(sblock.fs_maxbpg, maxbpg,
|
|
"maximum blocks per file in a cylinder group", "");
|
|
CHANGEVAL(sblock.fs_minfree, minfree,
|
|
"minimum percentage of free space", "%");
|
|
if (minfree != -1) {
|
|
if (minfree >= MINFREE &&
|
|
sblock.fs_optim == FS_OPTSPACE)
|
|
warnx(OPTWARN, "time", ">=", MINFREE);
|
|
if (minfree < MINFREE &&
|
|
sblock.fs_optim == FS_OPTTIME)
|
|
warnx(OPTWARN, "space", "<", MINFREE);
|
|
}
|
|
#ifdef TUNEFS_SOFTDEP
|
|
if (softdep == 1) {
|
|
sblock.fs_flags |= FS_DOSOFTDEP;
|
|
warnx("soft dependencies set");
|
|
} else if (softdep == 0) {
|
|
sblock.fs_flags &= ~FS_DOSOFTDEP;
|
|
warnx("soft dependencies cleared");
|
|
}
|
|
#endif
|
|
if (optim != -1) {
|
|
if (sblock.fs_optim == optim) {
|
|
warnx("%s remains unchanged as %s",
|
|
"optimization preference",
|
|
chg[optim]);
|
|
} else {
|
|
warnx("%s changes from %s to %s",
|
|
"optimization preference",
|
|
chg[sblock.fs_optim], chg[optim]);
|
|
sblock.fs_optim = optim;
|
|
if (sblock.fs_minfree >= MINFREE &&
|
|
optim == FS_OPTSPACE)
|
|
warnx(OPTWARN, "time", ">=", MINFREE);
|
|
if (sblock.fs_minfree < MINFREE &&
|
|
optim == FS_OPTTIME)
|
|
warnx(OPTWARN, "space", "<", MINFREE);
|
|
}
|
|
}
|
|
CHANGEVAL(sblock.fs_avgfilesize, avgfilesize,
|
|
"average file size", "");
|
|
CHANGEVAL(sblock.fs_avgfpdir, avgfpdir,
|
|
"expected number of files per directory", "");
|
|
|
|
if (Nflag) {
|
|
fprintf(stdout, "tunefs: current settings of %s\n", special);
|
|
fprintf(stdout, "\tmaximum contiguous block count %d\n",
|
|
sblock.fs_maxcontig);
|
|
fprintf(stdout,
|
|
"\tmaximum blocks per file in a cylinder group %d\n",
|
|
sblock.fs_maxbpg);
|
|
fprintf(stdout, "\tminimum percentage of free space %d%%\n",
|
|
sblock.fs_minfree);
|
|
#ifdef TUNEFS_SOFTDEP
|
|
fprintf(stdout, "\tsoft dependencies: %s\n",
|
|
(sblock.fs_flags & FS_DOSOFTDEP) ? "on" : "off");
|
|
#endif
|
|
fprintf(stdout, "\toptimization preference: %s\n",
|
|
chg[sblock.fs_optim]);
|
|
fprintf(stdout, "\taverage file size: %d\n",
|
|
sblock.fs_avgfilesize);
|
|
fprintf(stdout,
|
|
"\texpected number of files per directory: %d\n",
|
|
sblock.fs_avgfpdir);
|
|
fprintf(stdout, "tunefs: no changes made\n");
|
|
exit(0);
|
|
}
|
|
|
|
memcpy(buf, (char *)&sblock, SBLOCKSIZE);
|
|
if (needswap)
|
|
ffs_sb_swap((struct fs*)buf, (struct fs*)buf);
|
|
bwrite(sblockloc, buf, SBLOCKSIZE, special);
|
|
if (Aflag)
|
|
for (i = 0; i < sblock.fs_ncg; i++)
|
|
bwrite(fsbtodb(&sblock, cgsblock(&sblock, i)),
|
|
buf, SBLOCKSIZE, special);
|
|
close(fi);
|
|
exit(0);
|
|
}
|
|
|
|
static int
|
|
getnum(const char *num, const char *desc, int min, int max)
|
|
{
|
|
long n;
|
|
char *ep;
|
|
|
|
n = strtol(num, &ep, 10);
|
|
if (ep[0] != '\0')
|
|
errx(1, "Invalid number `%s' for %s", num, desc);
|
|
if ((int) n < min)
|
|
errx(1, "%s `%s' too small (minimum is %d)", desc, num, min);
|
|
if ((int) n > max)
|
|
errx(1, "%s `%s' too large (maximum is %d)", desc, num, max);
|
|
return ((int)n);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
fprintf(stderr, "Usage: tunefs [-AFN] tuneup-options special-device\n");
|
|
fprintf(stderr, "where tuneup-options are:\n");
|
|
fprintf(stderr, "\t-a maximum contiguous blocks\n");
|
|
fprintf(stderr, "\t-d rotational delay between contiguous blocks\n");
|
|
fprintf(stderr, "\t-e maximum blocks per file in a cylinder group\n");
|
|
fprintf(stderr, "\t-g average file size\n");
|
|
fprintf(stderr, "\t-h expected number of files per directory\n");
|
|
fprintf(stderr, "\t-k track skew in sectors\n");
|
|
fprintf(stderr, "\t-m minimum percentage of free space\n");
|
|
#ifdef TUNEFS_SOFTDEP
|
|
fprintf(stderr, "\t-n soft dependencies (`enable' or `disable')\n");
|
|
#endif
|
|
fprintf(stderr, "\t-o optimization preference (`space' or `time')\n");
|
|
exit(2);
|
|
}
|
|
|
|
static void
|
|
getsb(struct fs *fs, const char *file)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; sblock_try[i] != -1; i++) {
|
|
bread(sblock_try[i] / dev_bsize, (char *)fs, SBLOCKSIZE, file);
|
|
switch(fs->fs_magic) {
|
|
case FS_UFS2_MAGIC:
|
|
is_ufs2 = 1;
|
|
/*FALLTHROUGH*/
|
|
case FS_UFS1_MAGIC:
|
|
goto found;
|
|
case FS_UFS2_MAGIC_SWAPPED:
|
|
is_ufs2 = 1;
|
|
/*FALLTHROUGH*/
|
|
case FS_UFS1_MAGIC_SWAPPED:
|
|
warnx("%s: swapping byte order", file);
|
|
needswap = 1;
|
|
ffs_sb_swap(fs, fs);
|
|
goto found;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
errx(5, "cannot find filesystem superblock");
|
|
found:
|
|
if (is_ufs2 && fs->fs_sblockloc != sblock_try[i])
|
|
errx(5, "bad super block");
|
|
dev_bsize = fs->fs_fsize / fsbtodb(fs, 1);
|
|
sblockloc = sblock_try[i] / dev_bsize;
|
|
}
|
|
|
|
static void
|
|
bwrite(daddr_t blk, char *buffer, int size, const char *file)
|
|
{
|
|
off_t offset;
|
|
|
|
offset = (off_t)blk * dev_bsize;
|
|
if (lseek(fi, offset, SEEK_SET) == -1)
|
|
err(6, "%s: seeking to %lld", file, (long long)offset);
|
|
if (write(fi, buffer, size) != size)
|
|
err(7, "%s: writing %d bytes", file, size);
|
|
}
|
|
|
|
static void
|
|
bread(daddr_t blk, char *buffer, int cnt, const char *file)
|
|
{
|
|
off_t offset;
|
|
int i;
|
|
|
|
offset = (off_t)blk * dev_bsize;
|
|
if (lseek(fi, offset, SEEK_SET) == -1)
|
|
err(4, "%s: seeking to %lld", file, (long long)offset);
|
|
if ((i = read(fi, buffer, cnt)) != cnt)
|
|
errx(5, "%s: short read", file);
|
|
}
|
|
|
|
static int
|
|
openpartition(const char *name, int flags, char *device, size_t devicelen)
|
|
{
|
|
char rawspec[MAXPATHLEN], *p;
|
|
struct fstab *fs;
|
|
int fd, oerrno;
|
|
|
|
fs = getfsfile(name);
|
|
if (fs) {
|
|
if ((p = strrchr(fs->fs_spec, '/')) != NULL) {
|
|
snprintf(rawspec, sizeof(rawspec), "%.*s/r%s",
|
|
(int)(p - fs->fs_spec), fs->fs_spec, p + 1);
|
|
name = rawspec;
|
|
} else
|
|
name = fs->fs_spec;
|
|
}
|
|
fd = opendisk(name, flags, device, devicelen, 0);
|
|
if (fd == -1 && errno == ENOENT) {
|
|
oerrno = errno;
|
|
strlcpy(device, name, devicelen);
|
|
errno = oerrno;
|
|
}
|
|
return (fd);
|
|
}
|