Adding SectionName to PolicyTargetReference

This allows to attach policies to a specific section within th targeted ojbect.

Signed-off-by: huabing zhao <[email protected]>

Author: zhaohuabing

apis/v1alpha2/policy_types.go

@@ -38,6 +38,19 @@ type PolicyTargetReference struct {
 	//
 	// +optional
 	Namespace *Namespace `json:"namespace,omitempty"`
+
+	// SectionName is the name of a section within the target resource. When
+	// unspecified, this targets the entire resource. In the following
+	// resources, SectionName is interpreted as the following:
+	// * Gateway: Listener Name
+	// * Route: Rule Name
+	// * Service: Port Name
+	//
+	// +kubebuilder:validation:MinLength=1
+	// +kubebuilder:validation:MaxLength=253
+	// +optional
+	// <gateway:experimental>
+	SectionName string `json:"sectionName,omitempty"`
 }
 
 // PolicyConditionType is a type of condition for a policy. This type should be