NetBSD/sbin/fsirand/fsirand.c

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2001-11-16 17:33:37 +03:00
/* $NetBSD: fsirand.c,v 1.18 2001/11/16 14:33:37 lukem Exp $ */
/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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 NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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
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__RCSID("$NetBSD: fsirand.c,v 1.18 2001/11/16 14:33:37 lukem Exp $");
#endif /* lint */
#include <sys/param.h>
#include <sys/time.h>
#include <sys/vnode.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include <ufs/ufs/ufs_bswap.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
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static void usage(void);
static void getsblock(int, const char *, struct fs *);
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static void fixinodes(int, struct fs *, struct disklabel *, int, long);
static void statussig(int);
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int main(int, char *[]);
int needswap, ino, imax;
time_t tstart;
static void
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usage(void)
{
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(void) fprintf(stderr,
"Usage: %s [-F] [-p] [-x <constant>] <special>\n",
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getprogname());
exit(1);
}
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/*
* getsblock():
* Return the superblock
*/
static void
getsblock(int fd, const char *name, struct fs *fs)
{
if (lseek(fd, (off_t) SBOFF , SEEK_SET) == (off_t) -1)
err(1, "%s: cannot seek to superblock", name);
if (read(fd, fs, SBSIZE) != SBSIZE)
err(1, "%s: cannot read superblock", name);
if (fs->fs_magic != FS_MAGIC) {
if(fs->fs_magic == bswap32(FS_MAGIC)) {
needswap = 1;
ffs_sb_swap(fs, fs);
} else
errx(1, "%s: bad superblock magic number", name);
}
if (fs->fs_ncg < 1)
errx(1, "%s: bad ncg in superblock", name);
if (fs->fs_cpg < 1)
errx(1, "%s: bad cpg in superblock", name);
if (fs->fs_ncg * fs->fs_cpg < fs->fs_ncyl ||
(fs->fs_ncg - 1) * fs->fs_cpg >= fs->fs_ncyl)
errx(1, "%s: bad number of cylinders in superblock", name);
if (fs->fs_sbsize > SBSIZE)
errx(1, "%s: superblock too large", name);
}
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/*
* fixinodes():
* Randomize the inode generation numbers
*/
static void
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fixinodes(int fd, struct fs *fs, struct disklabel *lab, int pflag, long xorval)
{
int inopb = INOPB(fs);
int size = inopb * DINODE_SIZE;
caddr_t buf;
struct dinode *dip;
int i;
if ((buf = malloc(size)) == NULL)
err(1, "Out of memory");
for (ino = 0, imax = fs->fs_ipg * fs->fs_ncg; ino < imax;) {
off_t sp;
sp = (off_t) fsbtodb(fs, ino_to_fsba(fs, ino)) *
(off_t) lab->d_secsize;
if (lseek(fd, sp, SEEK_SET) == (off_t) -1)
err(1, "Seeking to inode %d failed", ino);
if (read(fd, buf, size) != size)
err(1, "Reading inodes %d+%d failed", ino, inopb);
for (i = 0; i < inopb; i++) {
dip = (struct dinode *)(buf + (i * DINODE_SIZE));
if (pflag)
printf("inode %10d gen 0x%08x\n", ino,
ufs_rw32(dip->di_gen, needswap));
else
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dip->di_gen = ufs_rw32(random() ^ xorval,
needswap);
if (++ino > imax)
errx(1, "Exceeded number of inodes");
}
if (pflag)
continue;
if (lseek(fd, sp, SEEK_SET) == (off_t) -1)
err(1, "Seeking to inode %d failed", ino);
if (write(fd, buf, size) != size)
err(1, "Writing inodes %d+%d failed", ino, inopb);
}
free(buf);
}
/*
* statussig():
* display current status
*/
void
statussig(int dummy)
{
char msgbuf[256];
int len, deltat;
time_t tnow, elapsed;
(void)time(&tnow);
elapsed = tnow - tstart;
len = snprintf(msgbuf, sizeof(msgbuf),
"fsirand: completed inode %d of %d (%3.2f%%)",
ino, imax, (ino * 100.0) / imax);
if (imax - ino) {
deltat = tstart - tnow + (1.0 * (tnow - tstart)) / ino * imax;
len += snprintf(msgbuf + len, sizeof(msgbuf) - len,
", finished in %d:%02d\n", deltat / 60, deltat % 60);
} else {
len += snprintf(msgbuf + len, sizeof(msgbuf) - len, "\n");
}
write(STDERR_FILENO, msgbuf, len);
}
int
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main(int argc, char *argv[])
{
const char *special;
char buf[SBSIZE], device[MAXPATHLEN];
struct fs *fs = (struct fs *) buf;
struct disklabel lab;
long xorval;
char *ep;
struct timeval tv;
int fd, c, Fflag, pflag, openflags;
xorval = 0;
Fflag = pflag = 0;
while ((c = getopt(argc, argv, "Fpx:")) != -1)
switch (c) {
case 'F':
Fflag++;
break;
case 'p':
pflag++;
break;
case 'x':
xorval = strtol(optarg, &ep, 0);
if ((xorval == LONG_MIN || xorval == LONG_MAX) &&
errno == ERANGE)
err(1, "Out of range constant");
if (*ep)
errx(1, "Bad constant");
break;
default:
usage();
}
argv += optind;
argc -= optind;
if (argc != 1)
usage();
(void) gettimeofday(&tv, NULL);
srandom((unsigned) tv.tv_usec);
special = argv[0];
openflags = pflag ? O_RDONLY : O_RDWR;
if (Fflag)
fd = open(special, openflags);
else {
fd = opendisk(special, openflags, device, sizeof(device), 0);
special = device;
}
if (fd == -1)
err(1, "Cannot open `%s'", special);
if (Fflag) {
memset(&lab, 0, sizeof(lab));
lab.d_secsize = DEV_BSIZE; /* XXX */
} else {
if (ioctl(fd, DIOCGDINFO, &lab) == -1)
err(1, "%s: cannot get disklabel information", special);
}
time(&tstart);
(void)signal(SIGINFO, statussig);
getsblock(fd, special, fs);
fixinodes(fd, fs, &lab, pflag, xorval);
(void) close(fd);
return 0;
}