#!/bin/sh

#
# Copyright (c) 2018 Dell EMC Isilon
# 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.
#

# Experiment with a sparse MD disk.

[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
[ `sysctl -n vm.swap_total` -eq 0 ] && exit 0
[ `sysctl -n hw.physmem` -lt $(( 4 * 1024 * 1024 * 1024)) ] && exit 0

. ../default.cfg

size="100g"
jsize="10g"
mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
mdconfig -a -t swap -s $size -u $mdstart || exit 1

gjournal load
gjournal label -s $jsize md$mdstart
sleep .5
newfs -J /dev/md$mdstart.journal > /dev/null
mount -o async /dev/md$mdstart.journal $mntpoint
chmod 777 $mntpoint

export runRUNTIME=10m
export RUNDIR=$mntpoint/stressX
export CTRLDIR=$mntpoint/stressX.control
export swapINCARNATIONS=5

su $testuser -c 'cd ..; ./run.sh marcus.cfg' > /dev/null 2>&1

gjournal sync
while mount | grep $mntpoint | grep -q /dev/md; do
	umount $mntpoint || sleep 1
done
checkfs /dev/md$mdstart.journal && s=0 || s=$?
gjournal stop md$mdstart
gjournal unload
mdconfig -d -u $mdstart
exit $s