291 lines
6.8 KiB
C
291 lines
6.8 KiB
C
/* $NetBSD: fsirand.c,v 1.32 2013/10/19 01:09:58 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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*
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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 1.32 2013/10/19 01:09:58 christos Exp $");
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#endif /* lint */
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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 <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include <signal.h>
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#include <ufs/ufs/ufs_bswap.h>
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#include <ufs/ufs/dinode.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ffs/ffs_extern.h>
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__dead static void usage(void);
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static void getsblock(int, const char *, struct fs *);
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static void fixinodes(int, struct fs *, struct disklabel *, int, long);
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static void statussig(int);
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int needswap, ino, imax, is_ufs2;
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static time_t tstart;
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static void
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usage(void)
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{
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(void) fprintf(stderr,
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"usage: %s [-F] [-p] [-x <constant>] <special>\n",
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getprogname());
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exit(1);
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}
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static const off_t sblock_try[] = SBLOCKSEARCH;
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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(int fd, const char *name, struct fs *fs)
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{
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int i;
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for (i = 0; ; i++) {
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if (sblock_try[i] == -1)
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errx(1, "%s: can't find superblock", name);
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if (pread(fd, fs, SBLOCKSIZE, sblock_try[i]) != SBLOCKSIZE)
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continue;
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switch(fs->fs_magic) {
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case FS_UFS2_MAGIC:
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is_ufs2 = 1;
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/* FALLTHROUGH */
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case FS_UFS1_MAGIC:
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break;
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case FS_UFS2_MAGIC_SWAPPED:
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is_ufs2 = 1;
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/* FALLTHROUGH */
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case FS_UFS1_MAGIC_SWAPPED:
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needswap = 1;
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ffs_sb_swap(fs, fs);
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break;
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default:
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continue;
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}
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if (!is_ufs2 && sblock_try[i] == SBLOCK_UFS2)
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continue;
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break;
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}
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if (fs->fs_ncg < 1)
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errx(1, "%s: bad ncg in superblock", name);
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if (fs->fs_sbsize > SBLOCKSIZE)
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errx(1, "%s: superblock too large", name);
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}
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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(int fd, struct fs *fs, struct disklabel *lab, int pflag, long xorval)
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{
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int inopb = FFS_INOPB(fs);
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int size;
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caddr_t buf;
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struct ufs1_dinode *dp1 = NULL;
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struct ufs2_dinode *dp2 = NULL;
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int i;
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size = is_ufs2 ? inopb * sizeof (struct ufs2_dinode) :
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inopb * sizeof (struct ufs1_dinode);
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if ((buf = malloc(size)) == NULL)
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err(1, "Out of memory");
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if (is_ufs2)
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dp2 = (struct ufs2_dinode *)buf;
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else
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dp1 = (struct ufs1_dinode *)buf;
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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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sp = (off_t) FFS_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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if (is_ufs2) {
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if (pflag)
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printf("inode %10d gen 0x%08x\n",
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ino,
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ufs_rw32(dp2[i].di_gen, needswap));
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else
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dp2[i].di_gen =
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ufs_rw32((arc4random() & INT32_MAX)^ xorval,
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needswap);
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} else {
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if (pflag)
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printf("inode %10d gen 0x%08x\n",
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ino,
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ufs_rw32(dp1[i].di_gen, needswap));
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else
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dp1[i].di_gen =
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ufs_rw32((arc4random() & INT32_MAX) ^ xorval,
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needswap);
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}
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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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/*
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* statussig():
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* display current status
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*/
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static void
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statussig(int dummy)
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{
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char msgbuf[256];
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int len, deltat;
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time_t tnow;
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(void)time(&tnow);
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len = snprintf(msgbuf, sizeof(msgbuf),
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"fsirand: completed inode %d of %d (%3.2f%%)",
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ino, imax, (ino * 100.0) / imax);
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if (imax - ino) {
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deltat = tstart - tnow + (1.0 * (tnow - tstart)) / ino * imax;
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len += snprintf(msgbuf + len, sizeof(msgbuf) - len,
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", finished in %d:%02d\n", deltat / 60, deltat % 60);
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} else {
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len += snprintf(msgbuf + len, sizeof(msgbuf) - len, "\n");
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}
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write(STDERR_FILENO, msgbuf, len);
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}
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int
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main(int argc, char *argv[])
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{
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const char *special;
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char buf[SBLOCKSIZE], device[MAXPATHLEN];
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struct fs *fs = (struct fs *) buf;
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struct disklabel lab;
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long xorval;
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char *ep;
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int fd, c, Fflag, pflag, openflags;
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xorval = 0;
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Fflag = pflag = 0;
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while ((c = getopt(argc, argv, "Fpx:")) != -1)
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switch (c) {
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case 'F':
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Fflag++;
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break;
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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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errno = 0;
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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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special = argv[0];
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openflags = pflag ? O_RDONLY : O_RDWR;
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if (Fflag)
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fd = open(special, openflags);
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else {
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fd = opendisk(special, openflags, device, sizeof(device), 0);
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special = device;
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}
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if (fd == -1)
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err(1, "Cannot open `%s'", special);
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if (Fflag) {
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memset(&lab, 0, sizeof(lab));
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lab.d_secsize = DEV_BSIZE; /* XXX */
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} else {
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if (ioctl(fd, DIOCGDINFO, &lab) == -1)
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err(1, "%s: cannot get disklabel information", special);
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}
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time(&tstart);
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(void)signal(SIGINFO, statussig);
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getsblock(fd, special, 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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