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/*
Copyright 2014 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 admission
import (
"fmt"
"strings"
"sync"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/validation"
"k8s.io/apiserver/pkg/authentication/user"
)
type attributesRecord struct {
kind schema.GroupVersionKind
namespace string
name string
resource schema.GroupVersionResource
subresource string
operation Operation
dryRun bool
object runtime.Object
oldObject runtime.Object
userInfo user.Info
// other elements are always accessed in single goroutine.
// But ValidatingAdmissionWebhook add annotations concurrently.
annotations map[string]string
annotationsLock sync.RWMutex
}
func NewAttributesRecord(object runtime.Object, oldObject runtime.Object, kind schema.GroupVersionKind, namespace, name string, resource schema.GroupVersionResource, subresource string, operation Operation, dryRun bool, userInfo user.Info) Attributes {
return &attributesRecord{
kind: kind,
namespace: namespace,
name: name,
resource: resource,
subresource: subresource,
operation: operation,
dryRun: dryRun,
object: object,
oldObject: oldObject,
userInfo: userInfo,
}
}
func (record *attributesRecord) GetKind() schema.GroupVersionKind {
return record.kind
}
func (record *attributesRecord) GetNamespace() string {
return record.namespace
}
func (record *attributesRecord) GetName() string {
return record.name
}
func (record *attributesRecord) GetResource() schema.GroupVersionResource {
return record.resource
}
func (record *attributesRecord) GetSubresource() string {
return record.subresource
}
func (record *attributesRecord) GetOperation() Operation {
return record.operation
}
func (record *attributesRecord) IsDryRun() bool {
return record.dryRun
}
func (record *attributesRecord) GetObject() runtime.Object {
return record.object
}
func (record *attributesRecord) GetOldObject() runtime.Object {
return record.oldObject
}
func (record *attributesRecord) GetUserInfo() user.Info {
return record.userInfo
}
// getAnnotations implements privateAnnotationsGetter.It's a private method used
// by WithAudit decorator.
func (record *attributesRecord) getAnnotations() map[string]string {
record.annotationsLock.RLock()
defer record.annotationsLock.RUnlock()
if record.annotations == nil {
return nil
}
cp := make(map[string]string, len(record.annotations))
for key, value := range record.annotations {
cp[key] = value
}
return cp
}
func (record *attributesRecord) AddAnnotation(key, value string) error {
if err := checkKeyFormat(key); err != nil {
return err
}
record.annotationsLock.Lock()
defer record.annotationsLock.Unlock()
if record.annotations == nil {
record.annotations = make(map[string]string)
}
if v, ok := record.annotations[key]; ok && v != value {
return fmt.Errorf("admission annotations are not allowd to be overwritten, key:%q, old value: %q, new value:%q", key, record.annotations[key], value)
}
record.annotations[key] = value
return nil
}
func checkKeyFormat(key string) error {
parts := strings.Split(key, "/")
if len(parts) != 2 {
return fmt.Errorf("annotation key has invalid format, the right format is a DNS subdomain prefix and '/' and key name. (e.g. 'podsecuritypolicy.admission.k8s.io/admit-policy')")
}
if msgs := validation.IsQualifiedName(key); len(msgs) != 0 {
return fmt.Errorf("annotation key has invalid format %s. A qualified name like 'podsecuritypolicy.admission.k8s.io/admit-policy' is required.", strings.Join(msgs, ","))
}
return nil
}
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