backingstore2.sh

#!/bin/sh

#
# Copyright (c) 2009 Peter Holm <[email protected]>
# 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.
#

# Test unmount of a device that is already gone

# Leaves /mnt6 unmountable and leads to a "panic: 1 vncache entries remaining"
# during shut down.

[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1

. ../default.cfg

D=$diskimage
export here=`pwd`

m1=$mdstart
m2=$((m1 + 1))
mount | grep "$mntpoint$m2" | grep -q md$m2 && umount $mntpoint$m2
mdconfig -l | grep -q md$m2 &&  mdconfig -d -u $m2
mount | grep "$mntpoint$m1" | grep -q md$m1 && umount $mntpoint$m1
mdconfig -l | grep -q md$m1 &&  mdconfig -d -u $m1
[ -d $mntpoint$m1 ] || mkdir -p $mntpoint$m1
[ -d $mntpoint$m2 ] || mkdir -p $mntpoint$m2

dd if=/dev/zero of=$D$m bs=100m count=1 status=none || exit 1

mdconfig -a -t vnode -f $D$m1 -u $m1

newfs md$m1 > /dev/null 2>&1
mount /dev/md$m1 $mntpoint$m1

truncate -s 500M $mntpoint$m1/diskimage
mdconfig -a -t vnode -f $mntpoint$m1/diskimage -u $m2

newfs md$m2 > /dev/null 2>&1
mount /dev/md$m2 $mntpoint$m2

# Reversed umount sequence:
umount -f /dev/md$m1
umount -f /dev/md$m2

mount | grep "$mntpoint" | grep -q md$m2 && umount $mntpoint$m2
mdconfig -l | grep -q md$m2 &&  mdconfig -d -u $m2
mount | grep "$mntpoint" | grep -q md$m1 && umount $mntpoint$m1
mdconfig -l | grep -q md$m1 &&  mdconfig -d -u $m1