Verify that pvcreate --dataalignment really does override the topology

detected alignment.

NOTE: lvm2 doesn't detect MD 1.2 metadata (now the default on RHEL6) so
for now I'm forcing 1.0 metadata.  This was needed to be able to reuse
the existing loop devices but recreate the md device with different
raid0 striping.

test/t-pvcreate-operation-md.sh

@@ -41,13 +41,17 @@ cleanup_md() {
 	sleep 2
 	rm -f $mddev
     fi
+}
+
+cleanup_md_and_teardown() {
+    cleanup_md
     teardown
 }
 
 # create 2 disk MD raid0 array (stripe_width=128K)
 test -b "$mddev" && exit 200
-mdadm --create $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
+mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 64 $dev1 $dev2
-trap 'aux cleanup_md' EXIT # cleanup this MD device at the end of the test
+trap 'aux cleanup_md_and_teardown' EXIT # cleanup this MD device at the end of the test
 test -b "$mddev" || exit 200
 
 # Test alignment of PV on MD without any MD-aware or topology-aware detection
@@ -113,3 +117,27 @@ EOF
 	pvremove $mddev_p
     fi
 fi
+
+# Test newer topology-aware alignment detection w/ --dataalignment override
+if [ $linux_minor -ge 33 ]; then
+    cleanup_md
+    pvcreate -f $dev1
+    pvcreate -f $dev2
+
+    # create 2 disk MD raid0 array (stripe_width=2M)
+    test -b "$mddev" && exit 200
+    mdadm --create --metadata=1.0 $mddev --auto=md --level 0 --raid-devices=2 --chunk 1024 $dev1 $dev2
+    test -b "$mddev" || exit 200
+
+    # optimal_io_size=2097152, minimum_io_size=1048576
+    pv_align="2.00m"
+    pvcreate --metadatasize 128k \
+	--config 'devices { md_chunk_alignment=0 }' $mddev
+    check_pv_field_ $mddev pe_start $pv_align
+
+    # now verify pe_start alignment override using --dataalignment
+    pv_align="192.00k"
+    pvcreate --dataalignment 64k --metadatasize 128k \
+	--config 'devices { md_chunk_alignment=0 }' $mddev
+    check_pv_field_ $mddev pe_start $pv_align
+fi