#!/bin/sh
#
# Copyright (c) 2008, 2011 Peter Holm <pho@FreeBSD.org>
# 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.
#
# 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 deadlock that could occur running umount and quota at the same time
# "panic: dqsync: file" seen:
# https://people.freebsd.org/~pho/stress/log/quota10.txt
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
[ "`sysctl -in kern.features.ufs_quota`" != "1" ] && exit 0
. ../default.cfg
mounts=15 # Number of parallel scripts
mdstart=$mdstart # Use md unit numbers from this point
D=$diskimage
export PATH_FSTAB=/tmp/fstab
if [ $# -eq 0 ]; then
rm -f $PATH_FSTAB
for i in `jot $mounts`; do
m=$((i + mdstart - 1))
[ ! -d ${mntpoint}$m ] && mkdir ${mntpoint}$m
mount | grep "$mntpoint" | grep -q md$m &&
umount ${mntpoint}$m
[ -c /dev/md$m ] && mdconfig -d -u $m
dd if=/dev/zero of=$D$m bs=1m count=1 status=none
mdconfig -a -t vnode -f $D$m -u $m
bsdlabel -w md$m auto
newfs md${m}$part > /dev/null 2>&1
echo "/dev/md${m}$part ${mntpoint}$m ufs rw,userquota 2 2" \
>> $PATH_FSTAB
mount ${mntpoint}$m
edquota -u -f ${mntpoint}$m -e \
${mntpoint}$m:100000:110000:15000:16000 root
umount ${mntpoint}$m
done
sync;sync;sync
# start the parallel tests
touch /tmp/$0
for i in `jot $mounts`; do
m=$((i + mdstart - 1))
./$0 $m &
./$0 find $m &
done
wait
for i in `jot $mounts`; do
m=$((i + mdstart - 1))
mdconfig -d -u $m
rm -f $D$m
done
rm -f $PATH_FSTAB
else
if [ $1 = find ]; then
while [ -r /tmp/$0 ]; do
(
quotaon ${mntpoint}$2
quotaoff ${mntpoint}$2
) 2>&1 | egrep -v "No such file or directory"
done
else
# The test: Parallel mount and unmounts
start=`date '+%s'`
while [ $((`date '+%s'` - start)) -lt 1200 ]; do
m=$1
opt=`[ $(( m % 2 )) -eq 0 ] && echo -f`
mount $opt /dev/md${m}$part ${mntpoint}$m
while mount | grep -qw $mntpoint$m; do
opt=$([ $((`date '+%s'` % 2)) -eq 0 ] &&
echo "-f")
umount $opt ${mntpoint}$m > /dev/null 2>&1
done
done
rm -f /tmp/$0
fi
fi
exit 0
