1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2018 Dell EMC Isilon 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# Parallel unmount of the same mount point with one mounter thread and 4 31# threads doing unmount. 32 33# "panic: dounmount: invalid lock refcount in the drain path @ 34# ../../../kern/vfs_mount.c:1409" seen in WiP code. 35 36[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 37 38. ../default.cfg 39 40parallel=4 41continue=/tmp/umount3.cont 42touch $continue 43 44[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 45mdconfig -a -t swap -s 10m -u $mdstart || exit 1 46newfs $newfs_flags md$mdstart > /dev/null 47mount /dev/md$mdstart $mntpoint 48 49for i in `jot $parallel`; do 50 while [ -f $continue ]; do umount $mntpoint; done 2>/dev/null & 51done 52 53start=`date '+%s'` 54while [ $((`date '+%s'` - start)) -lt 300 ]; do 55 mount | grep -q "on $mntpoint " || 56 mount /dev/md$mdstart $mntpoint 57done > /dev/null 2>&1 58rm $continue 59wait 60 61while mount | grep $mntpoint | grep -q /dev/md; do 62 umount $mntpoint || sleep 1 63done 64mdconfig -d -u $mdstart 65exit 0 66