247 lines
6.3 KiB
C
247 lines
6.3 KiB
C
/* $NetBSD: fsirand.c,v 1.11 2001/02/04 20:04:02 christos Exp $ */
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/*-
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* Copyright (c) 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: fsirand.c,v 1.11 2001/02/04 20:04:02 christos Exp $");
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#endif /* lint */
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <err.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <sys/disklabel.h>
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#include <sys/ioctl.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/inode.h>
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#include <ufs/ufs/ufs_bswap.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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static void usage __P((void));
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static void getsblock __P((int, const char *, struct disklabel *, struct fs *));
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static void fixinodes __P((int, struct fs *, struct disklabel *, int, long));
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int main __P((int, char *[]));
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int needswap = 0;
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extern char *__progname;
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static void
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usage()
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{
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(void) fprintf(stderr, "Usage: %s [-x <constant>] [-p] <special>\n",
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__progname);
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exit(1);
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}
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/* getsblock():
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* Return the superblock
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*/
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static void
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getsblock(fd, name, lab, fs)
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int fd;
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const char *name;
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struct disklabel *lab;
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struct fs *fs;
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{
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struct partition *pp = NULL;
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char p = name[strlen(name) - 1];
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if (p >= 'a' && p <= 'h')
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pp = &lab->d_partitions[p - 'a'];
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else if (isdigit((unsigned char) p))
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pp = &lab->d_partitions[0];
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else
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errx(1, "Invalid partition `%c'", p);
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if (pp->p_fstype != FS_BSDFFS)
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errx(1, "Not an FFS partition");
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if (lseek(fd, (off_t) SBOFF , SEEK_SET) == (off_t) -1)
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err(1, "Cannot seek to superblock");
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if (read(fd, fs, SBSIZE) != SBSIZE)
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err(1, "Cannot read superblock");
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if (fs->fs_magic != FS_MAGIC) {
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if(fs->fs_magic == bswap32(FS_MAGIC)) {
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needswap = 1;
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ffs_sb_swap(fs, fs, 0);
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} else
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errx(1, "Bad superblock magic number");
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}
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if (fs->fs_ncg < 1)
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errx(1, "Bad ncg in superblock");
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if (fs->fs_cpg < 1)
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errx(1, "Bad cpg in superblock");
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if (fs->fs_ncg * fs->fs_cpg < fs->fs_ncyl ||
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(fs->fs_ncg - 1) * fs->fs_cpg >= fs->fs_ncyl)
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errx(1, "Bad number of cylinders in superblock");
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if (fs->fs_sbsize > SBSIZE)
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errx(1, "Superblock too large");
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}
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/* fixinodes():
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* Randomize the inode generation numbers
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*/
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static void
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fixinodes(fd, fs, lab, pflag, xorval)
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int fd;
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struct fs *fs;
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struct disklabel *lab;
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int pflag;
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long xorval;
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{
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int inopb = INOPB(fs);
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int size = inopb * DINODE_SIZE;
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caddr_t buf;
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struct dinode *dip;
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int i, ino, imax;
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if ((buf = malloc(size)) == NULL)
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err(1, "Out of memory");
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for (ino = 0, imax = fs->fs_ipg * fs->fs_ncg; ino < imax;) {
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off_t sp;
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#if __GNUC__ /* XXX work around lame compiler problem (gcc 2.7.2) */
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(void)&sp;
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#endif
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sp = (off_t) fsbtodb(fs, ino_to_fsba(fs, ino)) *
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(off_t) lab->d_secsize;
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if (lseek(fd, sp, SEEK_SET) == (off_t) -1)
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err(1, "Seeking to inode %d failed", ino);
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if (read(fd, buf, size) != size)
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err(1, "Reading inodes %d+%d failed", ino, inopb);
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for (i = 0; i < inopb; i++) {
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dip = (struct dinode *)(buf + (i * DINODE_SIZE));
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if (pflag)
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printf("ino %d gen 0x%x\n", ino,
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ufs_rw32(dip->di_gen, needswap));
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else
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dip->di_gen = ufs_rw32(random() ^ xorval, needswap);
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if (++ino > imax)
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errx(1, "Exceeded number of inodes");
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}
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if (pflag)
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continue;
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if (lseek(fd, sp, SEEK_SET) == (off_t) -1)
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err(1, "Seeking to inode %d failed", ino);
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if (write(fd, buf, size) != size)
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err(1, "Writing inodes %d+%d failed", ino, inopb);
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}
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free(buf);
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}
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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 buf[SBSIZE];
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struct fs *fs = (struct fs *) buf;
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struct disklabel lab;
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int fd, c;
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long xorval = 0;
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char *ep;
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struct timeval tv;
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int pflag = 0;
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while ((c = getopt(argc, argv, "px:")) != -1)
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switch (c) {
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case 'p':
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pflag++;
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break;
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case 'x':
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xorval = strtol(optarg, &ep, 0);
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if ((xorval == LONG_MIN || xorval == LONG_MAX) &&
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errno == ERANGE)
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err(1, "Out of range constant");
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if (*ep)
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errx(1, "Bad constant");
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break;
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default:
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usage();
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}
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argv += optind;
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argc -= optind;
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if (argc != 1)
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usage();
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(void) gettimeofday(&tv, NULL);
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srandom((unsigned) tv.tv_usec);
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if ((fd = open(argv[0], pflag ? O_RDONLY : O_RDWR)) == -1)
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err(1, "Cannot open `%s'", argv[0]);
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if (ioctl(fd, DIOCGDINFO, &lab) == -1)
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err(1, "Cannot get label information");
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getsblock(fd, argv[0], &lab, fs);
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fixinodes(fd, fs, &lab, pflag, xorval);
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(void) close(fd);
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return 0;
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}
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