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#!/bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org>
#
# 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 AUTHOR 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 AUTHOR 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.
#
# Hunt for "panic: ufsdirhash_dirtrunc: bad offset"
# by making the directory inode grow into the indirect blocks.
# Truncate directories larger than 12 * block_size bytes
# default is 12 * 32768 = 393216, 384k
# No problems seen.
. ../default.cfg
[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
dir=/tmp
odir=`pwd`
cd $dir
sed '1,/^EOF/d' < $odir/$0 > $dir/indir.c
sed -i '' -e "s#MNTPOINT#$mntpoint#g" $dir/indir.c
mycc -o indir -Wall -Wextra -O0 -g indir.c || exit 1
rm -f indir.c
cd $odir
set -e
mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
mdconfig -a -t swap -s 1g -u $mdstart
newfs -j -n -b 16384 -f 2048 -i 2048 md$mdstart > /dev/null
mount /dev/md$mdstart $mntpoint
ifree=`df -i $mntpoint | tail -1 | awk '{print $7 - 50}'`
set +e
if [ $dtrace ]; then
dtrace -w -n '*ufsdirhash_dirtrunc:entry {@rw[execname,probefunc] = \
count(); }' &
dpid=$!
sleep 2
fi
/tmp/indir $mntpoint $ifree
if [ $dtrace ]; then
kill -s TERM $dpid
wait $dpid
fi
for i in `jot 6`; do
mount | grep -q "on $mntpoint " || break
umount $mntpoint && break || sleep 10
[ $i -eq 6 ] &&
{ echo FATAL; fstat -mf $mntpoint; exit 1; }
done
mdconfig -d -u $mdstart
rm -f /tmp/indir
if [ $dtrace ]; then
while pgrep -q dtrace; do sleep 1; done
kldstat | grep -q dtraceall &&
kldunload dtraceall.ko
fi
exit 0
EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdatomic.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
static long files;
static char *path;
#define PARALLEL 64
#define RUNTIME (10 * 60)
static void
test(int idx)
{
long j;
int fd;
pid_t pid;
char dir[128], file[128], new[128];
sleep(1);
snprintf(dir, sizeof(dir), "%s/d%d", path, idx);
if (mkdir(dir, 0755) == -1) {
if (errno != EEXIST)
err(1, "mkdir(%s)", dir);
}
if (chdir(dir) == -1)
err(1, "chdir(%s)", dir);
pid = getpid();
for (j = 0; j < files; j++) {
sprintf(file,"p%05d.%05ld", pid, j);
if ((fd = creat(file, 0660)) == -1)
err(1, "creat(%s). %s:%d", file, __FILE__, __LINE__);
if (fd != -1 && close(fd) == -1)
err(2, "close(%ld)", j);
}
for (j = 0; j < files; j++) {
sprintf(file,"p%05d.%05ld", pid, j);
sprintf(new,"p%05d.%05ld.old", pid, j);
if (rename(file, new) == -1)
err(1, "rename(%s, %s)", file, new);
}
for (j = 0; j < files; j++) {
sprintf(file,"p%05d.%05ld", pid, j);
sprintf(new,"p%05d.%05ld.old", pid, j);
if (rename(new, file) == -1)
err(1, "rename(%s, %s)", new, file);
}
for (j = 0; j < files; j++) {
sprintf(file,"p%05d.%05ld", pid, j);
if (unlink(file) == -1)
warn("unlink(%s)", file);
}
if (chdir("..") == -1)
err(1, "chdir ..");
_exit(0);
}
int
main(int argc, char *argv[])
{
pid_t pids[PARALLEL];
time_t start;
int e, i, n, status;
if (argc != 3) {
fprintf(stderr, "Usage %s <path> <files>\n", argv[0]);
exit(1);
}
path = argv[1];
files = atol(argv[2]) / PARALLEL;
fprintf(stderr, "Using %ld inodes per dir. %d threads. %ld inodes in total\n",
files, PARALLEL, files * PARALLEL);
e = n = 0;
start = time(NULL);
while ((time(NULL) - start) < RUNTIME && e == 0) {
fprintf(stderr, "Loop #%d\n", ++n);
for (i = 0; i < PARALLEL; i++) {
if ((pids[i] = fork()) == 0)
test(i);
if (pids[i] == -1)
err(1, "fork()");
}
for (i = 0; i < PARALLEL; i++) {
if (waitpid(pids[i], &status, 0) == -1)
err(1, "waitpid(%d)", pids[i]);
if (status != 0) {
if (WIFSIGNALED(status))
fprintf(stderr,
"pid %d exit signal %d\n",
pids[i], WTERMSIG(status));
}
e += status == 0 ? 0 : 1;
}
// system("(cd MNTPOINT; umount MNTPOINT) > /dev/null 2>&1");
}
return (e);
}
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