mdadm/test: Add one test case for raid5 reshape

This case tries to allow raid5 reshape to use backwards direction.
It changes chunksize after reshape and stops the raid. Then starts
the raid again.

Signed-off-by: Xiao Ni <xni@redhat.com>
Suggested-by:  Jes Sorensen <jes.sorensen@gmail.com>
Suggested-by:  Zhilong Liu <zlliu@suse.com>
Suggested-by:  Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>

diff --git a/test b/test
index 25268a0f76b38a6554df244f13e5ac665ae96362..e74bbe5756fa2687755eb4934ca1fd980524ce8d 100755 (executable)
--- a/test
+++ b/test
@@ -320,6 +320,13 @@ check() {
                grep -sq "inactive" /proc/mdstat ||
                        die "array is not inactive!"
                ;;
+       # It only can be used when there is only one raid
+       chunk )
+               chunk_size=`awk -F',' '/chunk/{print $2}' /proc/mdstat | awk -F'[a-z]' '{print $1}'`
+               if [ "$chunk_size" -ne "$2" ] ; then
+                       die "chunksize should be $2, but it's $chunk_size"
+               fi
+               ;;
        * )
                die "unknown check $1"
                ;;

diff --git a/tests/02r5grow b/tests/02r5grow
index 386e82ee9b9e3f8cf0465f5466fd34578cfc2dd3..bb9bd6da3702ffa425a9ccba583c552509e52a63 100644 (file)
--- a/tests/02r5grow
+++ b/tests/02r5grow
@@ -34,3 +34,20 @@ check nosync
 sh tests/testdev $md0 3 $[size/2] 128
 
 mdadm -S $md0
+
+# create a raid5 array and change the chunk
+mdadm -CR $md0 --level raid5 --metadata=1.1 --chunk=32 --raid-disks 3 --size $[size/2] $dev1 $dev2 $dev3
+check wait
+check state UUU
+check chunk 32
+
+mdadm $md0 --grow --chunk=64
+check reshape
+check wait
+check chunk 64
+
+mdadm -S $md0
+mdadm -A $md0 $dev1 $dev2 $dev3
+check state UUU
+check chunk 64
+mdadm -S $md0