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.

Conflicts:
  nova/tests/unit/virt/libvirt/test_utils.py
  nova/virt/libvirt/utils.py

NOTE(elod.illes): conflicts are due to patch to consolidate image
creation functions (I111cfc8a5eae27b15c6312957255fcf973038ddf) is only
introduced in zed.

Change-Id: I07b332a7edb814f6a91661651d9d24bfd6651ae7
Related-Bug: #2059809
(cherry picked from commit 08be7b2)
(cherry picked from commit 11301e7)
(cherry picked from commit 70a435f)
(cherry picked from commit f732f84)
(cherry picked from commit a2acb31)
(cherry picked from commit 3ba8ee1)

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

@@ -128,10 +128,12 @@ def _test_create_cow_image(
         else:
             backing_info = {}
         backing_backing_file = backing_info.pop('backing_file', None)
+        backing_fmt = backing_info.pop('backing_fmt',
+                                       mock.sentinel.backing_fmt)
 
         mock_execute.return_value = ('stdout', None)
         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 @@ def _test_create_cow_image(
         mock_execute.assert_has_calls([mock.call(
             'qemu-img', 'create', '-f', 'qcow2', '-o',
             'backing_file=%s,backing_fmt=%s,cluster_size=%s' % (
-                mock.sentinel.backing_path, mock.sentinel.backing_fmt,
+                mock.sentinel.backing_path, backing_fmt,
                 mock.sentinel.cluster_size),
              mock.sentinel.new_path)])
         if backing_file:
@@ -175,6 +177,28 @@ def test_create_image_base_has_data_file(self):
                           'data': {'data-file': mock.sentinel.data_file}},
         )
 
+    def test_create_image_size_none(self):
+        self._test_create_cow_image(
+            backing_file=mock.sentinel.backing_file,
+        )
+
+    def test_create_image_vmdk(self):
+        self._test_create_cow_image(
+            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_cow_image,
+            backing_file={'file': mock.sentinel.backing_file,
+                          'backing_fmt': 'vmdk',
+                          'backing_file': None,
+                          'data': {'create-type': 'monolithicFlat'}}
+        )
+
     @ddt.unpack
     @ddt.data({'fs_type': 'some_fs_type',
                'default_eph_format': None,

nova/virt/libvirt/utils.py

@@ -155,7 +155,8 @@ def create_cow_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(