Disallow moves between shares, even if they resolve to the same space.

internal/grpc/services/sharesstorageprovider/sharesstorageprovider.go

@@ -591,6 +591,12 @@ func (s *service) Move(ctx context.Context, req *provider.MoveRequest) (*provide
 		Interface("destination", req.Destination).
 		Msg("sharesstorageprovider: Got Move request")
 
+	if !utils.ResourceIDEqual(req.Source.ResourceId, req.Destination.ResourceId) {
+		return &provider.MoveResponse{
+			Status: status.NewUnimplemented(ctx, nil, "sharesstorageprovider: can not move between shares"),
+		}, nil
+	}
+
 	// TODO moving inside a shared tree should just be a forward of the move
 	//      but when do we rename a mounted share? Does that request even hit us?
 	//      - the registry needs to invalidate the alias
@@ -643,11 +649,6 @@ func (s *service) Move(ctx context.Context, req *provider.MoveRequest) (*provide
 			Status: rpcStatus,
 		}, nil
 	}
-	if srcReceivedShare.Share.ResourceId.SpaceId != dstReceivedShare.Share.ResourceId.SpaceId {
-		return &provider.MoveResponse{
-			Status: status.NewInvalid(ctx, "sharesstorageprovider: can not move between shares on different storages"),
-		}, nil
-	}
 
 	gatewayClient, err := s.gatewaySelector.Next()
 	if err != nil {