[Qemu-devel] [PATCH 2/2] qemu-iotests: Fix supported cache modes for 052

[Kevin Wolf <kwolf@redhat.com>]

The requirement for this test case is really "no O_DIRECT", because the
temporary snapshot for BDRV_O_SNAPSHOT is created in /tmp, which often
is a tmpfs.

Commit f210a83c ('qemu-iotests: Add _default_cache_mode and
_supported_cache_modes') turned the restriction into writethrough-only,
but that's not really necessary.

Allow to run the test for any non-O_DIRECT cache modes, and use the
global default of writeback if no cache mode is specified.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 tests/qemu-iotests/052 | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/qemu-iotests/052 b/tests/qemu-iotests/052
index 6bdae92..61959e2 100755
--- a/tests/qemu-iotests/052
+++ b/tests/qemu-iotests/052
@@ -41,8 +41,9 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 _supported_fmt generic
 _supported_proto file
 _supported_os Linux
-_default_cache_mode "writethrough"
-_supported_cache_modes "writethrough"
+
+# Don't do O_DIRECT on tmpfs
+_supported_cache_modes "writeback" "writethrough" "unsafe"
 
 size=128M
 _make_test_img $size
-- 
1.8.3.1