devs="$dev0 $dev1 $dev2"

set_up_test()
{
	mdadm -Cv -R -n 3 -l5 $md0 $devs --size=50M || die "create array failed"
	mdadm -a $md0 $dev3 || die "failed to bind new disk to array"
	mkfs.xfs -f $md0 || die "mkfs failed"
	xfs_ncheck $md0 || die "check fs failed"
}

clean_up_test()
{
	mdadm -S $md0
}

trap 'clean_up_test' EXIT

set_up_test || die "set up test failed"

# trigger reshape
echo 1000 > /sys/block/md0/md/sync_speed_max
mdadm --grow -l 6 $md0
sleep 1

# stop and start reshape
echo frozen > /sys/block/md0/md/sync_action
echo system > /sys/block/md0/md/sync_speed_max
echo reshape > /sys/block/md0/md/sync_action

mdadm -W $md0

# check if data is corrupted
xfs_ncheck $md0 || die "data is corrupted after reshape"

exit 0