NetBSD-5.0.2/sbin/fsirand/fsirand.c
/* $NetBSD: fsirand.c,v 1.28 2008/04/28 20:23:08 martin 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.
*
* 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
__RCSID("$NetBSD: fsirand.c,v 1.28 2008/04/28 20:23:08 martin 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 <signal.h>
#include <ufs/ufs/ufs_bswap.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <ufs/ffs/ffs_extern.h>
static void usage(void);
static void getsblock(int, const char *, struct fs *);
static void fixinodes(int, struct fs *, struct disklabel *, int, long);
static void statussig(int);
int needswap, ino, imax, is_ufs2;
time_t tstart;
static void
usage(void)
{
(void) fprintf(stderr,
"usage: %s [-F] [-p] [-x <constant>] <special>\n",
getprogname());
exit(1);
}
static const off_t sblock_try[] = SBLOCKSEARCH;
/*
* getsblock():
* Return the superblock
*/
static void
getsblock(int fd, const char *name, struct fs *fs)
{
int i;
for (i = 0; ; i++) {
if (sblock_try[i] == -1)
errx(1, "%s: can't find superblock", name);
if (pread(fd, fs, SBLOCKSIZE, sblock_try[i]) != SBLOCKSIZE)
continue;
switch(fs->fs_magic) {
case FS_UFS2_MAGIC:
is_ufs2 = 1;
/* FALLTHROUGH */
case FS_UFS1_MAGIC:
break;
case FS_UFS2_MAGIC_SWAPPED:
is_ufs2 = 1;
/* FALLTHROUGH */
case FS_UFS1_MAGIC_SWAPPED:
needswap = 1;
ffs_sb_swap(fs, fs);
break;
default:
continue;
}
if (!is_ufs2 && sblock_try[i] == SBLOCK_UFS2)
continue;
break;
}
if (fs->fs_ncg < 1)
errx(1, "%s: bad ncg in superblock", name);
if (fs->fs_sbsize > SBLOCKSIZE)
errx(1, "%s: superblock too large", name);
}
/*
* fixinodes():
* Randomize the inode generation numbers
*/
static void
fixinodes(int fd, struct fs *fs, struct disklabel *lab, int pflag, long xorval)
{
int inopb = INOPB(fs);
int size;
caddr_t buf;
struct ufs1_dinode *dp1 = NULL;
struct ufs2_dinode *dp2 = NULL;
int i;
size = is_ufs2 ? inopb * sizeof (struct ufs2_dinode) :
inopb * sizeof (struct ufs1_dinode);
if ((buf = malloc(size)) == NULL)
err(1, "Out of memory");
if (is_ufs2)
dp2 = (struct ufs2_dinode *)buf;
else
dp1 = (struct ufs1_dinode *)buf;
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++) {
if (is_ufs2) {
if (pflag)
printf("inode %10d gen 0x%08x\n",
ino,
ufs_rw32(dp2[i].di_gen, needswap));
else
dp2[i].di_gen =
ufs_rw32((arc4random() & INT32_MAX)^ xorval,
needswap);
} else {
if (pflag)
printf("inode %10d gen 0x%08x\n",
ino,
ufs_rw32(dp1[i].di_gen, needswap));
else
dp1[i].di_gen =
ufs_rw32((arc4random() & INT32_MAX) ^ 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
main(int argc, char *argv[])
{
const char *special;
char buf[SBLOCKSIZE], device[MAXPATHLEN];
struct fs *fs = (struct fs *) buf;
struct disklabel lab;
long xorval;
char *ep;
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':
errno = 0;
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();
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;
}