qemu-iotests: Remove cache mode test without medium

Specifying the cache mode for a driver without a medium is not a useful
thing to do: As long as there is no medium, the cache mode doesn't make
a difference, and once the 'change' command is used to insert a medium,
it ignores the old cache mode and makes the new medium use
cache=writethrough.

Later patches will make it an error to specify the cache mode for an
empty drive. Remove the corresponding test case.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>

3 files changed, 14 insertions, 14 deletions

diff --git a/tests/qemu-iotests/051 b/tests/qemu-iotests/051
index 17dbf04af4..f6f0f4d8d3 100755
--- a/tests/qemu-iotests/051
+++ b/tests/qemu-iotests/051
@@ -183,12 +183,12 @@ echo
 # Cannot use the test image because cache=none might not work on the host FS
 # Use cdrom so that we won't get errors about missing media
 
-run_qemu -drive media=cdrom,cache=none
-run_qemu -drive media=cdrom,cache=directsync
-run_qemu -drive media=cdrom,cache=writeback
-run_qemu -drive media=cdrom,cache=writethrough
-run_qemu -drive media=cdrom,cache=unsafe
-run_qemu -drive media=cdrom,cache=invalid_value
+run_qemu -drive driver=null-co,cache=none
+run_qemu -drive driver=null-co,cache=directsync
+run_qemu -drive driver=null-co,cache=writeback
+run_qemu -drive driver=null-co,cache=writethrough
+run_qemu -drive driver=null-co,cache=unsafe
+run_qemu -drive driver=null-co,cache=invalid_value
 
 echo
 echo === Specifying the protocol layer ===
diff --git a/tests/qemu-iotests/051.out b/tests/qemu-iotests/051.out
index 7765aa0bb2..7a459a3989 100644
--- a/tests/qemu-iotests/051.out
+++ b/tests/qemu-iotests/051.out
@@ -215,28 +215,28 @@ QEMU X.Y.Z monitor - type 'help' for more information
 
 === Cache modes ===
 
-Testing: -drive media=cdrom,cache=none
+Testing: -drive driver=null-co,cache=none
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
-Testing: -drive media=cdrom,cache=directsync
+Testing: -drive driver=null-co,cache=directsync
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
-Testing: -drive media=cdrom,cache=writeback
+Testing: -drive driver=null-co,cache=writeback
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
-Testing: -drive media=cdrom,cache=writethrough
+Testing: -drive driver=null-co,cache=writethrough
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
-Testing: -drive media=cdrom,cache=unsafe
+Testing: -drive driver=null-co,cache=unsafe
 QEMU X.Y.Z monitor - type 'help' for more information
 (qemu) qququiquit
 
-Testing: -drive media=cdrom,cache=invalid_value
-QEMU_PROG: -drive media=cdrom,cache=invalid_value: invalid cache option
+Testing: -drive driver=null-co,cache=invalid_value
+QEMU_PROG: -drive driver=null-co,cache=invalid_value: invalid cache option
 
 
 === Specifying the protocol layer ===
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
index 27eddec3e8..0a238ec1b7 100644
--- a/tests/qemu-iotests/iotests.py
+++ b/tests/qemu-iotests/iotests.py
@@ -148,12 +148,12 @@ class VM(object):
     def add_drive(self, path, opts='', interface='virtio'):
         '''Add a virtio-blk drive to the VM'''
         options = ['if=%s' % interface,
-                   'cache=%s' % cachemode,
                    'id=drive%d' % self._num_drives]
 
         if path is not None:
             options.append('file=%s' % path)
             options.append('format=%s' % imgfmt)
+            options.append('cache=%s' % cachemode)
 
         if opts:
             options.append(opts)