311 lines
8.9 KiB
C
311 lines
8.9 KiB
C
/* $OpenBSD: fsirand.c,v 1.9 1997/02/28 00:46:33 millert Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1997 Todd C. Miller <Todd.Miller@courtesan.com>
|
|
* 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 Todd C. Miller.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/disklabel.h>
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/resource.h>
|
|
|
|
#include <ufs/ufs/dinode.h>
|
|
#include <ufs/ffs/fs.h>
|
|
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
static void usage(void) __dead2;
|
|
int fsirand(char *);
|
|
|
|
/*
|
|
* Possible superblock locations ordered from most to least likely.
|
|
*/
|
|
static int sblock_try[] = SBLOCKSEARCH;
|
|
|
|
int printonly = 0, force = 0, ignorelabel = 0;
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int n, ex = 0;
|
|
struct rlimit rl;
|
|
|
|
while ((n = getopt(argc, argv, "bfp")) != -1) {
|
|
switch (n) {
|
|
case 'b':
|
|
ignorelabel++;
|
|
break;
|
|
case 'p':
|
|
printonly++;
|
|
break;
|
|
case 'f':
|
|
force++;
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
}
|
|
if (argc - optind < 1)
|
|
usage();
|
|
|
|
srandomdev();
|
|
|
|
/* Increase our data size to the max */
|
|
if (getrlimit(RLIMIT_DATA, &rl) == 0) {
|
|
rl.rlim_cur = rl.rlim_max;
|
|
if (setrlimit(RLIMIT_DATA, &rl) < 0)
|
|
warn("can't get resource limit to max data size");
|
|
} else
|
|
warn("can't get resource limit for data size");
|
|
|
|
for (n = optind; n < argc; n++) {
|
|
if (argc - optind != 1)
|
|
(void)puts(argv[n]);
|
|
ex += fsirand(argv[n]);
|
|
if (n < argc - 1)
|
|
putchar('\n');
|
|
}
|
|
|
|
exit(ex);
|
|
}
|
|
|
|
int
|
|
fsirand(char *device)
|
|
{
|
|
struct ufs1_dinode *dp1;
|
|
struct ufs2_dinode *dp2;
|
|
caddr_t inodebuf;
|
|
size_t ibufsize;
|
|
struct fs *sblock;
|
|
ino_t inumber, maxino;
|
|
ufs2_daddr_t sblockloc, dblk;
|
|
char sbuf[SBLOCKSIZE], sbuftmp[SBLOCKSIZE];
|
|
int i, devfd, n, cg;
|
|
u_int32_t bsize = DEV_BSIZE;
|
|
struct disklabel label;
|
|
|
|
if ((devfd = open(device, printonly ? O_RDONLY : O_RDWR)) < 0) {
|
|
warn("can't open %s", device);
|
|
return (1);
|
|
}
|
|
|
|
/* Get block size (usually 512) from disklabel if possible */
|
|
if (!ignorelabel) {
|
|
if (ioctl(devfd, DIOCGDINFO, &label) < 0)
|
|
warn("can't read disklabel, using sector size of %d",
|
|
bsize);
|
|
else
|
|
bsize = label.d_secsize;
|
|
}
|
|
|
|
/* Read in master superblock */
|
|
(void)memset(&sbuf, 0, sizeof(sbuf));
|
|
sblock = (struct fs *)&sbuf;
|
|
for (i = 0; sblock_try[i] != -1; i++) {
|
|
sblockloc = sblock_try[i];
|
|
if (lseek(devfd, sblockloc, SEEK_SET) == -1) {
|
|
warn("can't seek to superblock (%qd) on %s",
|
|
sblockloc, device);
|
|
return (1);
|
|
}
|
|
if ((n = read(devfd, (void *)sblock, SBLOCKSIZE))!=SBLOCKSIZE) {
|
|
warnx("can't read superblock on %s: %s", device,
|
|
(n < SBLOCKSIZE) ? "short read" : strerror(errno));
|
|
return (1);
|
|
}
|
|
if ((sblock->fs_magic == FS_UFS1_MAGIC ||
|
|
(sblock->fs_magic == FS_UFS2_MAGIC &&
|
|
sblock->fs_sblockloc == sblock_try[i])) &&
|
|
sblock->fs_bsize <= MAXBSIZE &&
|
|
sblock->fs_bsize >= sizeof(struct fs))
|
|
break;
|
|
}
|
|
if (sblock_try[i] == -1) {
|
|
fprintf(stderr, "Cannot find file system superblock\n");
|
|
return (1);
|
|
}
|
|
maxino = sblock->fs_ncg * sblock->fs_ipg;
|
|
|
|
if (sblock->fs_magic == FS_UFS1_MAGIC &&
|
|
sblock->fs_old_inodefmt < FS_44INODEFMT) {
|
|
warnx("file system format is too old, sorry");
|
|
return (1);
|
|
}
|
|
if (!force && !printonly && sblock->fs_clean != 1) {
|
|
warnx("file system is not clean, fsck %s first", device);
|
|
return (1);
|
|
}
|
|
|
|
/* Make sure backup superblocks are sane. */
|
|
sblock = (struct fs *)&sbuftmp;
|
|
for (cg = 0; cg < sblock->fs_ncg; cg++) {
|
|
dblk = fsbtodb(sblock, cgsblock(sblock, cg));
|
|
if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
|
|
warn("can't seek to %qd", (off_t)dblk * bsize);
|
|
return (1);
|
|
} else if ((n = write(devfd, (void *)sblock, SBLOCKSIZE)) != SBLOCKSIZE) {
|
|
warn("can't read backup superblock %d on %s: %s",
|
|
cg + 1, device, (n < SBLOCKSIZE) ? "short write"
|
|
: strerror(errno));
|
|
return (1);
|
|
}
|
|
if (sblock->fs_magic != FS_UFS1_MAGIC &&
|
|
sblock->fs_magic != FS_UFS2_MAGIC) {
|
|
warnx("bad magic number in backup superblock %d on %s",
|
|
cg + 1, device);
|
|
return (1);
|
|
}
|
|
if (sblock->fs_sbsize > SBLOCKSIZE) {
|
|
warnx("size of backup superblock %d on %s is preposterous",
|
|
cg + 1, device);
|
|
return (1);
|
|
}
|
|
}
|
|
sblock = (struct fs *)&sbuf;
|
|
|
|
/* XXX - should really cap buffer at 512kb or so */
|
|
if (sblock->fs_magic == FS_UFS1_MAGIC)
|
|
ibufsize = sizeof(struct ufs1_dinode) * sblock->fs_ipg;
|
|
else
|
|
ibufsize = sizeof(struct ufs2_dinode) * sblock->fs_ipg;
|
|
if ((inodebuf = malloc(ibufsize)) == NULL)
|
|
errx(1, "can't allocate memory for inode buffer");
|
|
|
|
if (printonly && (sblock->fs_id[0] || sblock->fs_id[1])) {
|
|
if (sblock->fs_id[0])
|
|
(void)printf("%s was randomized on %s", device,
|
|
ctime((const time_t *)&(sblock->fs_id[0])));
|
|
(void)printf("fsid: %x %x\n", sblock->fs_id[0],
|
|
sblock->fs_id[1]);
|
|
}
|
|
|
|
/* Randomize fs_id unless old 4.2BSD file system */
|
|
if (!printonly) {
|
|
/* Randomize fs_id and write out new sblock and backups */
|
|
sblock->fs_id[0] = (u_int32_t)time(NULL);
|
|
sblock->fs_id[1] = random();
|
|
|
|
if (lseek(devfd, sblockloc, SEEK_SET) == -1) {
|
|
warn("can't seek to superblock (%qd) on %s", sblockloc,
|
|
device);
|
|
return (1);
|
|
}
|
|
if ((n = write(devfd, (void *)sblock, SBLOCKSIZE)) !=
|
|
SBLOCKSIZE) {
|
|
warn("can't write superblock on %s: %s", device,
|
|
(n < SBLOCKSIZE) ? "short write" : strerror(errno));
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/* For each cylinder group, randomize inodes and update backup sblock */
|
|
for (cg = 0, inumber = 0; cg < sblock->fs_ncg; cg++) {
|
|
/* Update superblock if appropriate */
|
|
if (!printonly) {
|
|
dblk = fsbtodb(sblock, cgsblock(sblock, cg));
|
|
if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
|
|
warn("can't seek to %qd", (off_t)dblk * bsize);
|
|
return (1);
|
|
} else if ((n = write(devfd, (void *)sblock,
|
|
SBLOCKSIZE)) != SBLOCKSIZE) {
|
|
warn("can't write backup superblock %d on %s: %s",
|
|
cg + 1, device, (n < SBLOCKSIZE) ?
|
|
"short write" : strerror(errno));
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/* Read in inodes, then print or randomize generation nums */
|
|
dblk = fsbtodb(sblock, ino_to_fsba(sblock, inumber));
|
|
if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
|
|
warn("can't seek to %qd", (off_t)dblk * bsize);
|
|
return (1);
|
|
} else if ((n = read(devfd, inodebuf, ibufsize)) != ibufsize) {
|
|
warnx("can't read inodes: %s",
|
|
(n < ibufsize) ? "short read" : strerror(errno));
|
|
return (1);
|
|
}
|
|
|
|
for (n = 0; n < sblock->fs_ipg; n++, inumber++) {
|
|
if (sblock->fs_magic == FS_UFS1_MAGIC)
|
|
dp1 = &((struct ufs1_dinode *)inodebuf)[n];
|
|
else
|
|
dp2 = &((struct ufs2_dinode *)inodebuf)[n];
|
|
if (inumber >= ROOTINO) {
|
|
if (printonly)
|
|
(void)printf("ino %d gen %qx\n",
|
|
inumber,
|
|
sblock->fs_magic == FS_UFS1_MAGIC ?
|
|
(quad_t)dp1->di_gen : dp2->di_gen);
|
|
else if (sblock->fs_magic == FS_UFS1_MAGIC)
|
|
dp1->di_gen = random();
|
|
else
|
|
dp2->di_gen = random();
|
|
}
|
|
}
|
|
|
|
/* Write out modified inodes */
|
|
if (!printonly) {
|
|
if (lseek(devfd, (off_t)dblk * bsize, SEEK_SET) < 0) {
|
|
warn("can't seek to %qd",
|
|
(off_t)dblk * bsize);
|
|
return (1);
|
|
} else if ((n = write(devfd, inodebuf, ibufsize)) !=
|
|
ibufsize) {
|
|
warnx("can't write inodes: %s",
|
|
(n != ibufsize) ? "short write" :
|
|
strerror(errno));
|
|
return (1);
|
|
}
|
|
}
|
|
}
|
|
(void)close(devfd);
|
|
|
|
return(0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
(void)fprintf(stderr,
|
|
"usage: fsirand [-b] [-f] [-p] special [special ...]\n");
|
|
exit(1);
|
|
}
|