Add helper methods to attach/detach shares

Manila is the OpenStack Shared Filesystems service.
These series of patches implement changes required in Nova to allow the shares
provided by Manila to be associated with and attached to instances using
virtiofs.

Implements: blueprint libvirt-virtiofs-attach-manila-shares
Change-Id: Ieef67e5a090e2d4b5eb3dd53381c26d277ccfcbe

nova/tests/functional/api/client.py

@@ -395,6 +395,24 @@ class TestOpenStackClient(object):
         return self.api_delete('/servers/%s/os-volume_attachments/%s' %
                             (server_id, volume_id))
 
+    def get_server_shares(self, server_id):
+        return self.api_get('/servers/%s/shares' %
+                            (server_id)).body['share']
+
+    def get_server_share(self, server_id, share_id):
+        return self.api_get('/servers/%s/shares/%s' %
+                            (server_id, share_id)
+                        ).body['share']
+
+    def post_server_share(self, server_id, share_attachment):
+        return self.api_post('/servers/%s/shares' %
+                             (server_id), share_attachment
+                            ).body['share']
+
+    def delete_server_share(self, server_id, share_id):
+        return self.api_delete('/servers/%s/shares/%s' %
+                            (server_id, share_id))
+
     def post_server_metadata(self, server_id, metadata):
         post_body = {'metadata': {}}
         post_body['metadata'].update(metadata)

nova/tests/functional/integrated_helpers.py

@@ -550,6 +550,24 @@ class InstanceHelperMixin:
         self.notifier.wait_for_versioned_notifications(
             'instance.interface_detach.end')
 
+    def _get_share(self, server, share_id):
+        return (self.api.get_server_share(server['id'], share_id))
+
+    def _attach_share(self, server, share_id, tag=None):
+        if not tag:
+            self.api.post_server_share(
+                server['id'], {"share": {"share_id": share_id}})
+        else:
+            self.api.post_server_share(
+                server['id'], {"share": {"share_id": share_id, "tag": tag}})
+        self.notifier.wait_for_versioned_notifications(
+            'instance.share_attach.end')
+
+    def _detach_share(self, server, share_id):
+        self.api.delete_server_share(server['id'], share_id)
+        self.notifier.wait_for_versioned_notifications(
+            'instance.share_detach.end')
+
     def _rebuild_server(self, server, image_uuid, expected_state='ACTIVE'):
         """Rebuild a server."""
         self.api.post_server_action(