update dependencies (#6267)

Signed-off-by: hongming <coder.scala@gmail.com>

vendor/k8s.io/apiserver/pkg/admission/plugin/policy/matching/matching.go

@@ -0,0 +1,200 @@
+/*
+Copyright 2022 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 matching
+
+import (
+	"fmt"
+
+	v1 "k8s.io/api/admissionregistration/v1"
+	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/client-go/kubernetes"
+	listersv1 "k8s.io/client-go/listers/core/v1"
+
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/predicates/namespace"
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/predicates/object"
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/predicates/rules"
+)
+
+type MatchCriteria interface {
+	namespace.NamespaceSelectorProvider
+	object.ObjectSelectorProvider
+
+	GetMatchResources() v1.MatchResources
+}
+
+// Matcher decides if a request matches against matchCriteria
+type Matcher struct {
+	namespaceMatcher *namespace.Matcher
+	objectMatcher    *object.Matcher
+}
+
+func (m *Matcher) GetNamespace(name string) (*corev1.Namespace, error) {
+	return m.namespaceMatcher.GetNamespace(name)
+}
+
+// NewMatcher initialize the matcher with dependencies requires
+func NewMatcher(
+	namespaceLister listersv1.NamespaceLister,
+	client kubernetes.Interface,
+) *Matcher {
+	return &Matcher{
+		namespaceMatcher: &namespace.Matcher{
+			NamespaceLister: namespaceLister,
+			Client:          client,
+		},
+		objectMatcher: &object.Matcher{},
+	}
+}
+
+// ValidateInitialization verify if the matcher is ready before use
+func (m *Matcher) ValidateInitialization() error {
+	if err := m.namespaceMatcher.Validate(); err != nil {
+		return fmt.Errorf("namespaceMatcher is not properly setup: %v", err)
+	}
+	return nil
+}
+
+func (m *Matcher) Matches(attr admission.Attributes, o admission.ObjectInterfaces, criteria MatchCriteria) (bool, schema.GroupVersionResource, schema.GroupVersionKind, error) {
+	matches, matchNsErr := m.namespaceMatcher.MatchNamespaceSelector(criteria, attr)
+	// Should not return an error here for policy which do not apply to the request, even if err is an unexpected scenario.
+	if !matches && matchNsErr == nil {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, nil
+	}
+
+	matches, matchObjErr := m.objectMatcher.MatchObjectSelector(criteria, attr)
+	// Should not return an error here for policy which do not apply to the request, even if err is an unexpected scenario.
+	if !matches && matchObjErr == nil {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, nil
+	}
+
+	matchResources := criteria.GetMatchResources()
+	matchPolicy := matchResources.MatchPolicy
+	if isExcluded, _, _, err := matchesResourceRules(matchResources.ExcludeResourceRules, matchPolicy, attr, o); isExcluded || err != nil {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, err
+	}
+
+	var (
+		isMatch       bool
+		matchResource schema.GroupVersionResource
+		matchKind     schema.GroupVersionKind
+		matchErr      error
+	)
+	if len(matchResources.ResourceRules) == 0 {
+		isMatch = true
+		matchKind = attr.GetKind()
+		matchResource = attr.GetResource()
+	} else {
+		isMatch, matchResource, matchKind, matchErr = matchesResourceRules(matchResources.ResourceRules, matchPolicy, attr, o)
+	}
+	if matchErr != nil {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, matchErr
+	}
+	if !isMatch {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, nil
+	}
+
+	// now that we know this applies to this request otherwise, if there were selector errors, return them
+	if matchNsErr != nil {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, matchNsErr
+	}
+	if matchObjErr != nil {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, matchObjErr
+	}
+
+	return true, matchResource, matchKind, nil
+}
+
+func matchesResourceRules(namedRules []v1.NamedRuleWithOperations, matchPolicy *v1.MatchPolicyType, attr admission.Attributes, o admission.ObjectInterfaces) (bool, schema.GroupVersionResource, schema.GroupVersionKind, error) {
+	matchKind := attr.GetKind()
+	matchResource := attr.GetResource()
+
+	for _, namedRule := range namedRules {
+		rule := v1.RuleWithOperations(namedRule.RuleWithOperations)
+		ruleMatcher := rules.Matcher{
+			Rule: rule,
+			Attr: attr,
+		}
+		if !ruleMatcher.Matches() {
+			continue
+		}
+		// an empty name list always matches
+		if len(namedRule.ResourceNames) == 0 {
+			return true, matchResource, matchKind, nil
+		}
+		// TODO: GetName() can return an empty string if the user is relying on
+		// the API server to generate the name... figure out what to do for this edge case
+		name := attr.GetName()
+		for _, matchedName := range namedRule.ResourceNames {
+			if name == matchedName {
+				return true, matchResource, matchKind, nil
+			}
+		}
+	}
+
+	// if match policy is undefined or exact, don't perform fuzzy matching
+	// note that defaulting to fuzzy matching is set by the API
+	if matchPolicy == nil || *matchPolicy == v1.Exact {
+		return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, nil
+	}
+
+	attrWithOverride := &attrWithResourceOverride{Attributes: attr}
+	equivalents := o.GetEquivalentResourceMapper().EquivalentResourcesFor(attr.GetResource(), attr.GetSubresource())
+	for _, namedRule := range namedRules {
+		for _, equivalent := range equivalents {
+			if equivalent == attr.GetResource() {
+				// we have already checked the original resource
+				continue
+			}
+			attrWithOverride.resource = equivalent
+			rule := v1.RuleWithOperations(namedRule.RuleWithOperations)
+			m := rules.Matcher{
+				Rule: rule,
+				Attr: attrWithOverride,
+			}
+			if !m.Matches() {
+				continue
+			}
+			matchKind = o.GetEquivalentResourceMapper().KindFor(equivalent, attr.GetSubresource())
+			if matchKind.Empty() {
+				return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, fmt.Errorf("unable to convert to %v: unknown kind", equivalent)
+			}
+			// an empty name list always matches
+			if len(namedRule.ResourceNames) == 0 {
+				return true, equivalent, matchKind, nil
+			}
+
+			// TODO: GetName() can return an empty string if the user is relying on
+			// the API server to generate the name... figure out what to do for this edge case
+			name := attr.GetName()
+			for _, matchedName := range namedRule.ResourceNames {
+				if name == matchedName {
+					return true, equivalent, matchKind, nil
+				}
+			}
+		}
+	}
+	return false, schema.GroupVersionResource{}, schema.GroupVersionKind{}, nil
+}
+
+type attrWithResourceOverride struct {
+	admission.Attributes
+	resource schema.GroupVersionResource
+}
+
+func (a *attrWithResourceOverride) GetResource() schema.GroupVersionResource { return a.resource }