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/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package volumeattachment
import (
"context"
storageapiv1beta1 "k8s.io/api/storage/v1beta1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/validation/field"
genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/apiserver/pkg/storage/names"
"k8s.io/kubernetes/pkg/api/legacyscheme"
"k8s.io/kubernetes/pkg/apis/storage"
"k8s.io/kubernetes/pkg/apis/storage/validation"
)
// volumeAttachmentStrategy implements behavior for VolumeAttachment objects
type volumeAttachmentStrategy struct {
runtime.ObjectTyper
names.NameGenerator
}
// Strategy is the default logic that applies when creating and updating
// VolumeAttachment objects via the REST API.
var Strategy = volumeAttachmentStrategy{legacyscheme.Scheme, names.SimpleNameGenerator}
func (volumeAttachmentStrategy) NamespaceScoped() bool {
return false
}
// ResetBeforeCreate clears the Status field which is not allowed to be set by end users on creation.
func (volumeAttachmentStrategy) PrepareForCreate(ctx context.Context, obj runtime.Object) {
var groupVersion schema.GroupVersion
if requestInfo, found := genericapirequest.RequestInfoFrom(ctx); found {
groupVersion = schema.GroupVersion{Group: requestInfo.APIGroup, Version: requestInfo.APIVersion}
}
switch groupVersion {
case storageapiv1beta1.SchemeGroupVersion:
// allow modification of status for v1beta1
default:
volumeAttachment := obj.(*storage.VolumeAttachment)
volumeAttachment.Status = storage.VolumeAttachmentStatus{}
}
}
func (volumeAttachmentStrategy) Validate(ctx context.Context, obj runtime.Object) field.ErrorList {
volumeAttachment := obj.(*storage.VolumeAttachment)
errs := validation.ValidateVolumeAttachment(volumeAttachment)
var groupVersion schema.GroupVersion
if requestInfo, found := genericapirequest.RequestInfoFrom(ctx); found {
groupVersion = schema.GroupVersion{Group: requestInfo.APIGroup, Version: requestInfo.APIVersion}
}
switch groupVersion {
case storageapiv1beta1.SchemeGroupVersion:
// no extra validation
default:
// tighten up validation of newly created v1 attachments
errs = append(errs, validation.ValidateVolumeAttachmentV1(volumeAttachment)...)
}
return errs
}
// Canonicalize normalizes the object after validation.
func (volumeAttachmentStrategy) Canonicalize(obj runtime.Object) {
}
func (volumeAttachmentStrategy) AllowCreateOnUpdate() bool {
return false
}
// PrepareForUpdate sets the Status fields which is not allowed to be set by an end user updating a VolumeAttachment
func (volumeAttachmentStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
var groupVersion schema.GroupVersion
if requestInfo, found := genericapirequest.RequestInfoFrom(ctx); found {
groupVersion = schema.GroupVersion{Group: requestInfo.APIGroup, Version: requestInfo.APIVersion}
}
switch groupVersion {
case storageapiv1beta1.SchemeGroupVersion:
// allow modification of Status via main resource for v1beta1
default:
newVolumeAttachment := obj.(*storage.VolumeAttachment)
oldVolumeAttachment := old.(*storage.VolumeAttachment)
newVolumeAttachment.Status = oldVolumeAttachment.Status
// No need to increment Generation because we don't allow updates to spec
}
}
func (volumeAttachmentStrategy) ValidateUpdate(ctx context.Context, obj, old runtime.Object) field.ErrorList {
newVolumeAttachmentObj := obj.(*storage.VolumeAttachment)
oldVolumeAttachmentObj := old.(*storage.VolumeAttachment)
errorList := validation.ValidateVolumeAttachment(newVolumeAttachmentObj)
return append(errorList, validation.ValidateVolumeAttachmentUpdate(newVolumeAttachmentObj, oldVolumeAttachmentObj)...)
}
func (volumeAttachmentStrategy) AllowUnconditionalUpdate() bool {
return false
}
// volumeAttachmentStatusStrategy implements behavior for VolumeAttachmentStatus subresource
type volumeAttachmentStatusStrategy struct {
volumeAttachmentStrategy
}
// StatusStrategy is the default logic that applies when creating and updating
// VolumeAttachmentStatus subresource via the REST API.
var StatusStrategy = volumeAttachmentStatusStrategy{Strategy}
// PrepareForUpdate sets the Status fields which is not allowed to be set by an end user updating a VolumeAttachment
func (volumeAttachmentStatusStrategy) PrepareForUpdate(ctx context.Context, obj, old runtime.Object) {
newVolumeAttachment := obj.(*storage.VolumeAttachment)
oldVolumeAttachment := old.(*storage.VolumeAttachment)
newVolumeAttachment.Spec = oldVolumeAttachment.Spec
oldMeta := oldVolumeAttachment.ObjectMeta
newMeta := &newVolumeAttachment.ObjectMeta
newMeta.SetDeletionTimestamp(oldMeta.GetDeletionTimestamp())
newMeta.SetGeneration(oldMeta.GetGeneration())
newMeta.SetSelfLink(oldMeta.GetSelfLink())
newMeta.SetLabels(oldMeta.GetLabels())
newMeta.SetAnnotations(oldMeta.GetAnnotations())
newMeta.SetFinalizers(oldMeta.GetFinalizers())
newMeta.SetOwnerReferences(oldMeta.GetOwnerReferences())
}
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