1 /* 2 Copyright 2021 The Kubernetes Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package validation 18 19 import ( 20 "k8s.io/apimachinery/pkg/util/validation/field" 21 22 gatewayv1b1 "sigs.k8s.io/gateway-api/apis/v1beta1" 23 ) 24 25 // ValidateGatewayClassUpdate validates an update to oldClass according to the 26 // Gateway API specification. For additional details of the GatewayClass spec, refer to: 27 // https://gateway-api.sigs.k8s.io/v1beta1/reference/spec/#gateway.networking.k8s.io/v1beta1.GatewayClass 28 func ValidateGatewayClassUpdate(oldClass, newClass *gatewayv1b1.GatewayClass) field.ErrorList { 29 if oldClass == nil || newClass == nil { 30 return nil 31 } 32 var errs field.ErrorList 33 if oldClass.Spec.ControllerName != newClass.Spec.ControllerName { 34 errs = append(errs, field.Invalid(field.NewPath("spec.controllerName"), newClass.Spec.ControllerName, 35 "cannot update an immutable field")) 36 } 37 return errs 38 } 39