1#!/bin/sh 2 3# 4# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30 31# Deadlock seen when deleting the snapshots during an "ls" of the FS 32 33# Based on test scenario by John Kozubik <john at kozubik dot com> 34# kern/94769: [ufs] Multiple file deletions on multi-snapshotted filesystems 35# causes hang 36 37[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 38 39. ../default.cfg 40 41mount | grep -q /dev/md${mdstart}$part && umount -f /dev/md${mdstart}$part 42mdconfig -l | grep -q md${mdstart} && mdconfig -d -u $mdstart 43 44 45parallel=20 46size=25 # Gb 47[ `df -k $(dirname $diskimage) | tail -1 | awk '{print $4'}` -lt $((size * 1024 * 1024)) ] && \ 48 echo "Not enough disk space." && exit 1 49truncate -s ${size}G $diskimage 50 51mdconfig -a -t vnode -f $diskimage -u $mdstart 52bsdlabel -w md$mdstart auto 53newfs -O2 -U md${mdstart}${part} > /dev/null 54mount /dev/md${mdstart}${part} $mntpoint 55 56 57cc -o /tmp/fstool -Wall ../tools/fstool.c 58for i in `jot $parallel`; do 59 (mkdir $mntpoint/test$i; cd $mntpoint/test$i; /tmp/fstool -l -f 50 -n 500 -s 8k) & 60done 61for i in `jot $parallel`; do 62 wait 63done 64rm -f /tmp/fstool 65 66mksnap_ffs $mntpoint $mntpoint/.snap/snap1 67mksnap_ffs $mntpoint $mntpoint/.snap/snap2 68mksnap_ffs $mntpoint $mntpoint/.snap/snap3 69mksnap_ffs $mntpoint $mntpoint/.snap/snap4 70mksnap_ffs $mntpoint $mntpoint/.snap/snap5 71mksnap_ffs $mntpoint $mntpoint/.snap/snap6 72mksnap_ffs $mntpoint $mntpoint/.snap/snap7 73mksnap_ffs $mntpoint $mntpoint/.snap/snap8 74mksnap_ffs $mntpoint $mntpoint/.snap/snap9 75 76for i in `jot $parallel`; do 77 rm -rf $mntpoint/test$i & 78done 79for i in `jot $parallel`; do 80 wait 81done 82 83rm -rf $mntpoint/.snap/snap? & 84 85for i in `jot 10`; do 86 ls -lsrt $mntpoint > /dev/null 2>&1 87 sleep 2 88done 89wait 90 91umount /dev/md${mdstart}$part 92 93mount | grep -q /dev/md${mdstart}$part && umount -f /dev/md${mdstart}$part 94mdconfig -l | grep -q md${mdstart} && mdconfig -d -u $mdstart 95rm -f $diskimage 96