#!/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 unmodified, 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 sparse file read
# No problems seen.

. ../default.cfg

set -e
mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
mdconfig -a -t swap -s 5g -u $mdstart
newfs $newfs_flags md$mdstart > /dev/null
mount /dev/md$mdstart $mntpoint
set +e

in=$mntpoint/in
out=$mntpoint/out

size=`jot -r 1 1 2048`
size=$((size * 1024 * 1024))
truncate -s $size $in

for i in `jot $(jot -r 1 10 100)`; do
	bs=`jot -r 1 1 4096`
	pos=`jot -r 1 0 $((size - bs))`
	pos=$((pos / bs)) # in blocks
	[ $((pos + bs)) -gt $size ] && { echo "seek error"; exit 1; }
	dd if=/dev/random of=$in seek=$pos bs=$bs count=1 conv=notrunc \
	    status=none
done
[ `stat -f%z $in` -ne $size ] && { ls -l $in; exit 1; }

cp $in $out
md1=`md5 < $in`
md2=`md5 < $out`
[ $md1 == $md2 ] && s=0 ||
	{ echo "md5 differs: $in: $md1, $out: $md2"; s=1
	ls -l $in $out; }
rm -f $in $out
for i in `jot 6`; do
	mount | grep -q "on $mntpoint " || break
	umount $mntpoint && break || sleep 10
	[ $i -eq 6 ] &&
	    { echo FATAL; fstat -mf $mntpoint; exit 1; }
done
mdconfig -d -u $mdstart
exit $s