Fix vmdk_allowed_types checking

This restores the vmdk_allowed_types checking in create_image()
that was unintentionally lost by tightening the
qemu-type-matches-glance code in the fetch patch recently. Since we
are still detecting the format of base images without metadata, we
would have treated a vmdk file that claims to be raw as raw in fetch,
but then read it like a vmdk once it was used as a base image for
something else.

Change-Id: I07b332a7edb814f6a91661651d9d24bfd6651ae7
Related-Bug: #2059809
(cherry picked from commit 08be7b2a0d)

nova/tests/unit/virt/libvirt/test_utils.py

@@ -119,9 +119,11 @@ class LibvirtUtilsTestCase(test.NoDBTestCase):
         else:
             backing_info = {}
         backing_backing_file = backing_info.pop('backing_file', None)
+        backing_fmt = backing_info.pop('backing_fmt',
+                                       mock.sentinel.backing_fmt)
 
         mock_info.return_value = mock.Mock(
-            file_format=mock.sentinel.backing_fmt,
+            file_format=backing_fmt,
             cluster_size=mock.sentinel.cluster_size,
             backing_file=backing_backing_file,
             format_specific=backing_info,
@@ -144,7 +146,7 @@ class LibvirtUtilsTestCase(test.NoDBTestCase):
             cow_opts = [
                 '-o',
                 f'backing_file={backing_file},'
-                f'backing_fmt={mock.sentinel.backing_fmt},'
+                f'backing_fmt={backing_fmt},'
                 f'cluster_size={mock.sentinel.cluster_size}',
             ]
 
@@ -221,6 +223,25 @@ class LibvirtUtilsTestCase(test.NoDBTestCase):
             backing_file=mock.sentinel.backing_file,
         )
 
+    def test_create_image_vmdk(self):
+        self._test_create_image(
+            '/some/vmdk', 'vmdk', '1234567891234',
+            backing_file={'file': mock.sentinel.backing_file,
+                          'backing_fmt': 'vmdk',
+                          'backing_file': None,
+                          'data': {'create-type': 'monolithicSparse'}}
+        )
+
+    def test_create_image_vmdk_invalid_type(self):
+        self.assertRaises(exception.ImageUnacceptable,
+            self._test_create_image,
+            '/some/vmdk', 'vmdk', '1234567891234',
+            backing_file={'file': mock.sentinel.backing_file,
+                          'backing_fmt': 'vmdk',
+                          'backing_file': None,
+                          'data': {'create-type': 'monolithicFlat'}}
+        )
+
     def test_create_image_encryption(self):
         encryption = {
             'secret': 'a_secret',

nova/virt/libvirt/utils.py

@@ -168,6 +168,8 @@ def create_image(
                     reason=_('Base image failed safety check'))
 
         base_details = images.qemu_img_info(backing_file)
+        if base_details.file_format == 'vmdk':
+            images.check_vmdk_image('base', base_details)
         if base_details.backing_file is not None:
             LOG.warning('Base image %s failed safety check', backing_file)
             raise exception.InvalidDiskInfo(