mdadm: improve the dlm locking mechanism for clustered raid

[thirdparty/mdadm.git] / tests / 19raid6repair

number_of_disks=4
chunksize_in_kib=512
chunksize_in_b=$[chunksize_in_kib*1024]
array_data_size_in_kib=$[chunksize_in_kib*(number_of_disks-2)*number_of_disks]
array_data_size_in_b=$[array_data_size_in_kib*1024]
devs="$dev1 $dev2 $dev3 $dev4"

# default 2048 sectors
data_offset_in_kib=$[2048/2]

layouts="ls rs la ra parity-first ddf-zero-restart ddf-N-restart ddf-N-continue \
	left-asymmetric-6 right-asymmetric-6 left-symmetric-6 \
	right-symmetric-6 parity-first-6"

for layout in $layouts
do
    for failure in "$dev3 3 3 2" "$dev3 3 2 3" "$dev3 3 2 1" "$dev3 3 2 0" \
		"$dev4 3 3 0" "$dev4 3 3 1" "$dev4 3 3 2" \
		"$dev1 3 0 1" "$dev1 3 0 2" "$dev1 3 0 3" \
		"$dev2 3 1 0" "$dev2 3 1 2" "$dev2 3 1 3" ; do
	    failure_split=( $failure )
	    device_with_error=${failure_split[0]}
	    stripe_with_error=${failure_split[1]}
	    repair_params="$stripe_with_error ${failure_split[2]} ${failure_split[3]}"
	    start_of_errors_in_kib=$[data_offset_in_kib+chunksize_in_kib*stripe_with_error]

	    # make a raid5 from a file
	    dd if=/dev/urandom of=/tmp/RandFile bs=1024 count=$array_data_size_in_kib
	    mdadm -CR $md0 -l6 --layout=$layout -n$number_of_disks -c $chunksize_in_kib $devs
	    dd if=/tmp/RandFile of=$md0 bs=1024 count=$array_data_size_in_kib
	    blockdev --flushbufs $md0; sync

	    check wait
	    blockdev --flushbufs $devs; sync
	    echo 3 > /proc/sys/vm/drop_caches
	    cmp -s -n $array_data_size_in_b $md0 /tmp/RandFile || { echo sanity cmp failed ; exit 2; }

	    dd if=/dev/urandom of=$device_with_error bs=1024 count=$chunksize_in_kib seek=$start_of_errors_in_kib
	    blockdev --flushbufs $device_with_error; sync
	    echo 3 > /proc/sys/vm/drop_caches

	    $dir/raid6check $md0 0 0 2>&1 | grep -qs "Error" || { echo should detect errors; exit 2; }

	    $dir/raid6check $md0 repair $repair_params > /dev/null || { echo repair failed; exit 2; }
	    blockdev --flushbufs $md0 $devs; sync
	    echo 3 > /proc/sys/vm/drop_caches

	    $dir/raid6check $md0 0 0 2>&1 | grep -qs "Error" && { echo errors detected; exit 2; }
	    cmp -s -n $array_data_size_in_b $md0 /tmp/RandFile || { echo cmp failed ; exit 2; }

	    mdadm -S $md0
	    udevadm settle
	    sync
	    echo 3 > /proc/sys/vm/drop_caches
    done
done