share-size not set to 1 with 'manage_error' state

Currently, when we set share-state to 'manage-error', share-size
is set to 1 at all places except this one. Which results in error
logged during delete-share, w.r.t quota.

This fix sets share-size to 1 when share state is
set to 'manage_error'.

Change-Id: I96343ffd4f273b01c0376713717cdc89ea9a873a
Closes-Bug: #1587636

manila/scheduler/manager.py

@@ -126,9 +126,12 @@ class SchedulerManager(manager.Manager):
         """Ensure that the host exists and can accept the share."""
 
         def _manage_share_set_error(self, context, ex, request_spec):
+            # NOTE(nidhimittalhada): set size as 1 because design expects size
+            # to be set, it also will allow us to handle delete/unmanage
+            # operations properly with this errored share according to quotas.
             self._set_share_state_and_notify(
                 'manage_share',
-                {'status': constants.STATUS_MANAGE_ERROR},
+                {'status': constants.STATUS_MANAGE_ERROR, 'size': 1},
                 context, ex, request_spec)
 
         share_ref = db.share_get(context, share_id)

manila/tests/scheduler/test_manager.py

@@ -258,13 +258,20 @@ class SchedulerManagerTestCase(test.TestCase):
 
         share = db_utils.create_share()
 
+        db_update = self.mock_object(db, 'share_update', mock.Mock())
         self.mock_object(
             base.Scheduler, 'host_passes_filters',
             mock.Mock(side_effect=exception.NoValidHost('fake')))
 
+        share_id = share['id']
+
         self.assertRaises(
             exception.NoValidHost, self.manager.manage_share,
-            self.context, share['id'], 'driver_options', {}, None)
+            self.context, share['id'], 'driver_options',
+            {'share_id': share_id}, None)
+        db_update.assert_called_once_with(
+            self.context, share_id,
+            {'status': constants.STATUS_MANAGE_ERROR, 'size': 1})
 
     def test_create_share_replica_exception_path(self):
         """Test 'raisable' exceptions for create_share_replica."""

manila_tempest_tests/tests/api/admin/test_share_manage.py

@@ -212,6 +212,8 @@ class ManageNFSShareTest(base.BaseSharesAdminTest):
 
         self.shares_v2_client.wait_for_share_status(
             share['id'], 'manage_error')
+        share = self.shares_v2_client.get_share(share['id'])
+        self.assertEqual(1, int(share['size']))
 
         # Delete resource from backend. We need to manage the share properly
         # so it can be removed.

releasenotes/notes/error-share-set-size-ff5d4f4ac2d56755.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+ - Any errors that may occur during 'managing' a share into manila will
+   result in the share's size being set to 1, aside from transitioning
+   the status to 'manage_error'.