NetApp SolidFire: Fix CG snapshot deletion

This adds a function missing on the driver that was making impossible
to delete a consistency group snapshot.

Change-Id: I4d6a4f5cf4f4f0f751e1378d3747d2aacc050d24
Closes-bug: #1788418
Closes-bug: #1777862

cinder/tests/unit/volume/drivers/solidfire/test_solidfire.py

@@ -27,6 +27,8 @@ from cinder import context
 from cinder import exception
 from cinder.objects import fields
 from cinder import test
+from cinder.tests.unit import fake_group_snapshot
+from cinder.tests.unit import fake_snapshot
 from cinder.tests.unit.image import fake as fake_image
 from cinder.tests.unit import utils as test_utils
 from cinder.volume import configuration as conf
@@ -1797,8 +1799,8 @@ class SolidFireVolumeTestCase(test.TestCase):
         source = {'group_snapshot_id': 'typical_cgsnap_id',
                   'volume_id': 'typical_vol_id',
                   'id': 'no_id_4_u'}
-        name = (self.configuration.sf_volume_prefix
-                + source.get('group_snapshot_id'))
+        name = (self.configuration.sf_volume_prefix +
+                source.get('group_snapshot_id'))
         with mock.patch.object(sfv,
                                '_get_group_snapshot_by_name',
                                return_value={}) as get,\
@@ -1819,6 +1821,36 @@ class SolidFireVolumeTestCase(test.TestCase):
                          {'status': fields.GroupStatus.AVAILABLE})
         group_cg_test.assert_called_once_with(group)
 
+    @mock.patch('cinder.volume.utils.is_group_a_cg_snapshot_type')
+    def test_delete_group_snap_cg(self, group_cg_test):
+        sfv = solidfire.SolidFireDriver(configuration=self.configuration)
+        group_cg_test.return_value = True
+        cgsnapshot = fake_group_snapshot.fake_group_snapshot_obj(
+            mock.MagicMock())
+        snapshots = fake_snapshot.fake_snapshot_obj(mock.MagicMock())
+
+        with mock.patch.object(sfv, '_delete_cgsnapshot',
+                               return_value={}) as _del_mock:
+            model_update = sfv.delete_group_snapshot(self.ctxt,
+                                                     cgsnapshot, snapshots)
+            _del_mock.assert_called_once_with(self.ctxt, cgsnapshot, snapshots)
+            self.assertEqual({}, model_update)
+
+    @mock.patch('cinder.volume.utils.is_group_a_cg_snapshot_type')
+    def test_delete_group_snap(self, group_cg_test):
+        sfv = solidfire.SolidFireDriver(configuration=self.configuration)
+        group_cg_test.return_value = False
+        cgsnapshot = fake_group_snapshot.fake_group_snapshot_obj(
+            mock.MagicMock())
+        snapshots = fake_snapshot.fake_snapshot_obj(mock.MagicMock())
+
+        with mock.patch.object(sfv, '_delete_cgsnapshot',
+                               return_value={}) as _del_mock:
+
+            self.assertRaises(NotImplementedError, sfv.delete_group_snapshot,
+                              self.ctxt, cgsnapshot, snapshots)
+            _del_mock.assert_not_called()
+
     @mock.patch('cinder.volume.utils.is_group_a_cg_snapshot_type')
     def test_create_group_rainy(self, group_cg_test):
         sfv = solidfire.SolidFireDriver(configuration=self.configuration)

cinder/volume/drivers/solidfire.py

@@ -1833,6 +1833,13 @@ class SolidFireDriver(san.SanISCSIDriver):
         self._delete_cgsnapshot_by_name(snap_name)
         return None, None
 
+    def delete_group_snapshot(self, context, group_snapshot, snapshots):
+        if vol_utils.is_group_a_cg_snapshot_type(group_snapshot):
+            return self._delete_cgsnapshot(context, group_snapshot, snapshots)
+
+        # Default implementation handles other scenarios.
+        raise NotImplementedError()
+
     def _delete_consistencygroup(self, ctxt, group, volumes):
         # TODO(chris_morrell): exception handling and return correctly updated
         # volume_models.

releasenotes/notes/fix-netapp-cg-da4fd6c396e5bedb.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - Fixes a bug in NetApp SolidFire where the deletion of group snapshots
+    was failing.