kubernetes-sigs
diff --git a/‎apis/applyconfiguration/apis/v1/fraction.go
+48 b/‎apis/applyconfiguration/apis/v1/fraction.go
+48
diff --git a/‎apis/applyconfiguration/apis/v1/httprequestmirrorfilter.go
+18 b/‎apis/applyconfiguration/apis/v1/httprequestmirrorfilter.go
+18
diff --git a/‎apis/applyconfiguration/internal/internal.go
+17 b/‎apis/applyconfiguration/internal/internal.go
+17
diff --git a/‎apis/applyconfiguration/utils.go
+2 b/‎apis/applyconfiguration/utils.go
+2
diff --git a/‎apis/v1/grpcroute_types.go
+2 b/‎apis/v1/grpcroute_types.go
+2
diff --git a/‎apis/v1/httproute_types.go
+25 b/‎apis/v1/httproute_types.go
+25
diff --git a/‎apis/v1/shared_types.go
+11 b/‎apis/v1/shared_types.go
+11
diff --git a/‎apis/v1/zz_generated.deepcopy.go
+26 b/‎apis/v1/zz_generated.deepcopy.go
+26
@@ -550,6 +550,8 @@ type GRPCRouteFilter struct {
 	// Support: Extended
 	//
 	// +optional
+	//
+	// <gateway:experimental:validation:XValidation:message="Only one of percent or fraction may be specified in HTTPRequestMirrorFilter",rule="!(has(self.percent) && has(self.fraction))">
 	RequestMirror *HTTPRequestMirrorFilter `json:"requestMirror,omitempty"`
 
 	// ExtensionRef is an optional, implementation-specific extension to the
 
@@ -757,6 +757,8 @@ type HTTPRouteFilter struct {
 	// Support: Extended
 	//
 	// +optional
+	//
+	// <gateway:experimental:validation:XValidation:message="Only one of percent or fraction may be specified in HTTPRequestMirrorFilter",rule="!(has(self.percent) && has(self.fraction))">
 	RequestMirror *HTTPRequestMirrorFilter `json:"requestMirror,omitempty"`
 
 	// RequestRedirect defines a schema for a filter that responds to the
@@ -1153,6 +1155,29 @@ type HTTPRequestMirrorFilter struct {
 	//
 	// Support: Implementation-specific for any other resource
 	BackendRef BackendObjectReference `json:"backendRef"`
+
+	// Percent represents the percentage of requests that should be
+	// mirrored to BackendRef. Its minimum value is 0 (indicating 0% of
+	// requests) and its maximum value is 100 (indicating 100% of requests).
+	//
+	// Only one of Fraction or Percent may be specified. If neither field
+	// is specified, 100% of requests will be mirrored.
+	//
+	// +optional
+	// +kubebuilder:validation:Minimum=0
+	// +kubebuilder:validation:Maximum=100
+	// <gateway:experimental>
+	Percent *int32 `json:"percent,omitempty"`
+
+	// Fraction represents the fraction of requests that should be
+	// mirrored to BackendRef.
+	//
+	// Only one of Fraction or Percent may be specified. If neither field
+	// is specified, 100% of requests will be mirrored.
+	//
+	// +optional
+	// <gateway:experimental>
+	Fraction Fraction `json:"fraction,omitempty"`
 }
 
 // HTTPBackendRef defines how a HTTPRoute forwards a HTTP request.
 
@@ -855,3 +855,14 @@ const (
 	// Support: Extended
 	PermanentCookieLifetimeType CookieLifetimeType = "Permanent"
 )
+
+// +kubebuilder:validation:XValidation:message="numerator must be less than or equal to denominator",rule="self.numerator <= self.denominator"
+type Fraction struct {
+	// +kubebuilder:validation:Minimum=0
+	Numerator int32 `json:"numerator"`
+
+	// +optional
+	// +kubebuilder:default=100
+	// +kubebuilder:validation:Minimum=1
+	Denominator *int32 `json:"denominator,omitempty"`
+}