iotests: Test valid values of l2-cache-entry-size

The l2-cache-entry-size setting can only contain values that are
powers of two between 512 and the cluster size.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: bd3547b670b8d0af11480c760991a22bcae5b48c.1517840877.git.berto@igalia.com
[mreitz: Changed non-power-of-two test value from 300 to 4242]
Signed-off-by: Max Reitz <mreitz@redhat.com>

tests/qemu-iotests/103

@@ -66,6 +66,14 @@ $QEMU_IO -c "open -o cache-size=1M,refcount-cache-size=2M $TEST_IMG" 2>&1 \
 $QEMU_IO -c "open -o cache-size=0,l2-cache-size=0,refcount-cache-size=0 $TEST_IMG" \
     2>&1 | _filter_testdir | _filter_imgfmt
 
+# Invalid cache entry sizes
+$QEMU_IO -c "open -o l2-cache-entry-size=256 $TEST_IMG" \
+    2>&1 | _filter_testdir | _filter_imgfmt
+$QEMU_IO -c "open -o l2-cache-entry-size=4242 $TEST_IMG" \
+    2>&1 | _filter_testdir | _filter_imgfmt
+$QEMU_IO -c "open -o l2-cache-entry-size=128k $TEST_IMG" \
+    2>&1 | _filter_testdir | _filter_imgfmt
+
 echo
 echo '=== Testing valid option combinations ==='
 echo
@@ -94,6 +102,15 @@ $QEMU_IO -c "open -o l2-cache-size=1M,refcount-cache-size=0.25M $TEST_IMG" \
          -c 'read -P 42 0 64k' \
     | _filter_qemu_io
 
+# Valid cache entry sizes
+$QEMU_IO -c "open -o l2-cache-entry-size=512 $TEST_IMG" \
+    2>&1 | _filter_testdir | _filter_imgfmt
+$QEMU_IO -c "open -o l2-cache-entry-size=16k $TEST_IMG" \
+    2>&1 | _filter_testdir | _filter_imgfmt
+$QEMU_IO -c "open -o l2-cache-entry-size=64k $TEST_IMG" \
+    2>&1 | _filter_testdir | _filter_imgfmt
+
+
 echo
 echo '=== Testing minimal L2 cache and COW ==='
 echo

tests/qemu-iotests/103.out

@@ -9,6 +9,9 @@ can't open device TEST_DIR/t.IMGFMT: cache-size, l2-cache-size and refcount-cach
 can't open device TEST_DIR/t.IMGFMT: l2-cache-size may not exceed cache-size
 can't open device TEST_DIR/t.IMGFMT: refcount-cache-size may not exceed cache-size
 can't open device TEST_DIR/t.IMGFMT: cache-size, l2-cache-size and refcount-cache-size may not be set the same time
+can't open device TEST_DIR/t.IMGFMT: L2 cache entry size must be a power of two between 512 and the cluster size (65536)
+can't open device TEST_DIR/t.IMGFMT: L2 cache entry size must be a power of two between 512 and the cluster size (65536)
+can't open device TEST_DIR/t.IMGFMT: L2 cache entry size must be a power of two between 512 and the cluster size (65536)
 
 === Testing valid option combinations ===