# Any format supporting backing files except vmdk and qcow which do not support
# smaller backing files.
_supported_fmt qcow2 qed
-_supported_proto generic
+_supported_proto file
_supported_os Linux
# Choose a size that is not necessarily a cluster size multiple for image
echo
# Fill end of base image with a pattern, skipping every other sector
-io writev $offset 512 1024 31
+io writev $offset 512 1024 32
_check_test_img
echo "Creating test image with backing file"
echo
-mv $TEST_IMG $TEST_IMG.base
-_make_test_img -b $TEST_IMG.base $image_size
+mv "$TEST_IMG" "$TEST_IMG.base"
+_make_test_img -b "$TEST_IMG.base" $image_size
echo "Filling test image"
echo
# Write every other sector around where the base image ends
-io writev $(( offset + 512 )) 512 1024 63
+io writev $(( offset + 512 )) 512 1024 64
_check_test_img
echo
# Base image sectors
-io readv $(( offset )) 512 1024 31
+io readv $(( offset )) 512 1024 32
# Image sectors
-io readv $(( offset + 512 )) 512 1024 63
+io readv $(( offset + 512 )) 512 1024 64
# Zero sectors beyond end of base image
-io_zero readv $(( offset + 32 * 1024 )) 512 1024 31
+io_zero readv $(( offset + 32 * 1024 )) 512 1024 32
+
+_check_test_img
+
+# Rebase it on top of its base image
+$QEMU_IMG rebase -b "$TEST_IMG.base" "$TEST_IMG"
_check_test_img