tests/env-ddf-template: helper for new unit test

I forgot to check in this helper script, similar to the one for IMSM.
It is needed by tests/10ddf-create-fail-rebuild.

Signed-off-by: Martin Wilck <mwilck@arcor.de>
Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/tests/env-ddf-template b/tests/env-ddf-template
new file mode 100644 (file)
index 0000000..fa7af1f
--- /dev/null
+++ b/tests/env-ddf-template
@@ -0,0 +1,76 @@
+ddf_check() {
+    udevadm settle
+    case $1 in
+    container )
+       grep -s "blocks super external:ddf" /proc/mdstat > /dev/null || {
+           echo >&2 "**Fatal** Correctly formed container not found"; cat /proc/mdstat; exit 1; }
+       ;;
+    member )
+       t_member=$2
+       t_num_disks=$3
+       t_level=$4
+       t_rd_size=$5
+       t_size=$6
+       t_offset=$7
+       t_chunk=$8
+       t_layout=$9
+
+       if [ $t_chunk -ne 0 ]; then
+           t_rd_size=$((t_rd_size & ~(t_chunk - 1)))
+       fi
+       case $t_level in
+       0) t_size=$((t_num_disks*$t_rd_size));;
+       1) t_size=$t_rd_size;;
+       4|5) t_size=$(((t_num_disks-1)*$t_rd_size));;
+       6) t_size=$(((t_num_disks-2)*$t_rd_size));;
+       10) t_size=$((t_num_disks*$t_rd_size/t_layout));;
+       esac
+
+       err=0
+
+       eval `stat -L -c "let major=0x%t; let minor=0x%T;" $t_member`
+       sysfs=/sys/dev/block/${major}:${minor}
+       if [ ! -f ${sysfs}/md/array_state ]; then
+           echo "**Fatal**: Array member $t_member not found" >&2; cat /proc/mdstat >&2; exit 1
+       fi
+       _chunk=`cat ${sysfs}/md/chunk_size`
+       if [ $t_chunk -ne $((_chunk/1024)) ]; then
+           echo "**Error**: Chunk size mismatch - expected $t_chunk, actual $_chunk" >&2
+           err=$((err + 1))
+       fi
+       for i in `seq 0 $((t_num_disks - 1))`; do
+           _offset=`cat ${sysfs}/md/rd${i}/offset`
+           if [ $t_offset -ne $((_offset / 2)) ]; then
+               echo "**Error**: Offset mismatch - expected $t_offset, actual $((_offset/2))" >&2
+               err=$((err + 1))
+           fi
+           _rd_size=`cat ${sysfs}/md/rd${i}/size`
+           if [ $t_rd_size -ne $_rd_size ]; then
+               echo "**Error**: Component size mismatch - expected $t_rd_size, actual $_rd_size" >&2
+               err=$((err + 1))
+           fi
+       done
+       _size=`cat ${sysfs}/md/array_size`
+       [ o$_size = odefault ] && _size=$(($(cat ${sysfs}/size)/2))
+       if [ $t_size -ne $_size ]; then
+           echo "**Error**: Array size mismatch - expected $t_size, actual $_size" >&2
+           err=$((err + 1))
+       fi
+       if [ $err -gt 0 ]; then
+           echo "$t_member failed check" >&2
+           cat /proc/mdstat >&2
+           mdadm -E /dev/loop8 >&2
+           exit 1
+       fi
+       ;;
+    * )
+       echo >&2 "**Error** unknown check $1"; exit 1;
+    esac
+}
+
+container=/dev/md/ddf
+member0=/dev/md/vol0
+member1=/dev/md/vol1
+member2=/dev/md/vol2
+member3=/dev/md/vol3
+member4=/dev/md/vol4