Unimplemented RPC method stubs for volume expand

Author: davidz627

pkg/gce-pd-csi-driver/controller.go

@@ -604,6 +604,10 @@ func (gceCS *GCEControllerServer) ListSnapshots(ctx context.Context, req *csi.Li
 	return gceCS.getSnapshots(ctx, req)
 }
 
+func (gceCS *GCEControllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
+	return nil, status.Error(codes.Unimplemented, "ControllerExpandVolume is not yet implemented")
+}
+
 func (gceCS *GCEControllerServer) getSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error) {
 	snapshots := []*compute.Snapshot{}
 	var nextToken string

pkg/gce-pd-csi-driver/node.go

@@ -298,3 +298,7 @@ func (ns *GCENodeServer) NodeGetInfo(ctx context.Context, req *csi.NodeGetInfoRe
 func (ns *GCENodeServer) NodeGetVolumeStats(ctx context.Context, req *csi.NodeGetVolumeStatsRequest) (*csi.NodeGetVolumeStatsResponse, error) {
 	return nil, status.Error(codes.Unimplemented, fmt.Sprintf("NodeGetVolumeStats is not yet implemented"))
 }
+
+func (ns *GCENodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
+	return nil, status.Error(codes.Unimplemented, fmt.Sprintf("NodeExpandVolume is not yet implemented"))
+}