tests: basic ddf tests

Test script to create a ddf with three different member arrays,
and assemble it in a variety of ways.

Signed-off-by: NeilBrown <neilb@suse.de>

tests/10ddf-create

@@ -0,0 +1,76 @@
+#
+# Test basic DDF functionality.
+#
+# Create a container with 5 drives
+# create a small raid0 across them all, then a 2disk raid1
+# and a 3disk raid5 using the remaining space
+#
+# add some data, tear down the array, reassemble
+# and make sure it is still there.
+
+mdadm -CR /dev/md/ddf0 -e ddf -n 5 $dev8 $dev9 $dev10 $dev11 $dev12
+mdadm -CR r0 -l0 -n5 /dev/md/ddf0 -z 5000
+mdadm -CR r1 -l1 -n2 /dev/md/ddf0
+mdadm -CR r5 -l5 -n3 /dev/md/ddf0
+testdev /dev/md/r0 5 5000 64
+# r0 will use 4992 due to chunk size, so that leave 27776 for the rest
+testdev /dev/md/r1 1 27776 1
+testdev /dev/md/r5 2 27776 64
+dd if=/dev/sda of=/dev/md/r0 || true
+dd if=/dev/sda of=/dev/md/r1 || true
+dd if=/dev/sda of=/dev/md/r5 || true
+
+s0=`sha1sum /dev/md/r0`
+s1=`sha1sum /dev/md/r1`
+s5=`sha1sum /dev/md/r5`
+
+
+mdadm -Ss
+mdadm -A /dev/md/ddf0  $dev8 $dev9 $dev10 $dev11 $dev12
+mdadm -I /dev/md/ddf0
+
+s0a=`sha1sum /dev/md/r0`
+s1a=`sha1sum /dev/md/r1`
+s5a=`sha1sum /dev/md/r5`
+
+if [ "$s0" != "$s0a" ]; then
+   echo r0 did not match ; exit 1;
+fi
+if [ "$s1" != "$s1a" ]; then
+   echo r1 did not match ; exit 1;
+fi
+if [ "$s5" != "$s5a" ]; then
+   echo r5 did not match ; exit 1;
+fi
+
+# failure status just means it has completed already, so ignore it.
+mdadm --wait /dev/md/r1 || true
+mdadm --wait /dev/md/r5 || true
+
+mdadm -Dbs > /var/tmp/mdadm.conf
+
+mdadm -Ss
+
+# Now try to assemble using mdadm.conf
+mdadm -Asc /var/tmp/mdadm.conf
+check nosync  # This failed once. The raid5 was resyncing.
+
+mdadm -Dbs > /tmp/mdadm.conf
+diff /tmp/mdadm.conf /var/tmp/mdadm.conf
+mdadm -Ss
+
+# and now assemble fully incrementally.
+for i in  $dev8 $dev9 $dev10 $dev11 $dev12
+do 
+  #./mdadm -I $i -vv 2>&1 | wc -l > /tmp/cnt
+  ./mdadm -I $i 2> /tmp/thing
+  wc -l < /tmp/thing > /tmp/cnt
+  # should find container and 2 devices, so 3 lines.
+  [ `cat /tmp/cnt` -eq 3 ]
+done
+check nosync
+
+mdadm -Dbs > /tmp/mdadm.conf
+diff /tmp/mdadm.conf /var/tmp/mdadm.conf
+mdadm -Ss
+rm /tmp/mdadm.conf /var/tmp/mdadm.conf