diff --git a/envoy/COMMIT b/envoy/COMMIT
index d085ab98f..95058f017 100644
--- a/envoy/COMMIT
+++ b/envoy/COMMIT
@@ -1 +1 @@
-07f6286c2e9da40908f28022562ebd7ae332ca47
+8f95f9ec501febe91e3f7688a3f85e33a2052d7a
diff --git a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go
index 06cbea5e8..857956d19 100755
--- a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go
+++ b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.go
@@ -93,7 +93,7 @@ const (
 // <arch_overview_advanced_filter_state_sharing>` object in a namespace matching the filter
 // name.
 //
-// [#next-free-field: 16]
+// [#next-free-field: 17]
 type ExternalProcessor struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -183,6 +183,8 @@ type ExternalProcessor struct {
 	// Instead, the stream to the external processor will be closed. There will be no
 	// more external processing for this stream from now on.
 	DisableImmediateResponse bool `protobuf:"varint,15,opt,name=disable_immediate_response,json=disableImmediateResponse,proto3" json:"disable_immediate_response,omitempty"`
+	// Options related to the sending and receiving of dynamic metadata.
+	MetadataOptions *MetadataOptions `protobuf:"bytes,16,opt,name=metadata_options,json=metadataOptions,proto3" json:"metadata_options,omitempty"`
 }
 
 func (x *ExternalProcessor) Reset() {
@@ -322,6 +324,76 @@ func (x *ExternalProcessor) GetDisableImmediateResponse() bool {
 	return false
 }
 
+func (x *ExternalProcessor) GetMetadataOptions() *MetadataOptions {
+	if x != nil {
+		return x.MetadataOptions
+	}
+	return nil
+}
+
+// The MetadataOptions structure defines options for the sending and receiving of
+// dynamic metadata. Specifically, which namespaces to send to the server, whether
+// metadata returned by the server may be written, and how that metadata may be written.
+type MetadataOptions struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Describes which typed or untyped dynamic metadata namespaces to forward to
+	// the external processing server.
+	ForwardingNamespaces *MetadataOptions_MetadataNamespaces `protobuf:"bytes,1,opt,name=forwarding_namespaces,json=forwardingNamespaces,proto3" json:"forwarding_namespaces,omitempty"`
+	// Describes which typed or untyped dynamic metadata namespaces to accept from
+	// the external processing server. Set to empty or leave unset to disallow writing
+	// any received dynamic metadata. Receiving of typed metadata is not supported.
+	ReceivingNamespaces *MetadataOptions_MetadataNamespaces `protobuf:"bytes,2,opt,name=receiving_namespaces,json=receivingNamespaces,proto3" json:"receiving_namespaces,omitempty"`
+}
+
+func (x *MetadataOptions) Reset() {
+	*x = MetadataOptions{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MetadataOptions) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MetadataOptions) ProtoMessage() {}
+
+func (x *MetadataOptions) ProtoReflect() protoreflect.Message {
+	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MetadataOptions.ProtoReflect.Descriptor instead.
+func (*MetadataOptions) Descriptor() ([]byte, []int) {
+	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *MetadataOptions) GetForwardingNamespaces() *MetadataOptions_MetadataNamespaces {
+	if x != nil {
+		return x.ForwardingNamespaces
+	}
+	return nil
+}
+
+func (x *MetadataOptions) GetReceivingNamespaces() *MetadataOptions_MetadataNamespaces {
+	if x != nil {
+		return x.ReceivingNamespaces
+	}
+	return nil
+}
+
 // The HeaderForwardingRules structure specifies what headers are
 // allowed to be forwarded to the external processing server.
 //
@@ -350,7 +422,7 @@ type HeaderForwardingRules struct {
 func (x *HeaderForwardingRules) Reset() {
 	*x = HeaderForwardingRules{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[1]
+		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -363,7 +435,7 @@ func (x *HeaderForwardingRules) String() string {
 func (*HeaderForwardingRules) ProtoMessage() {}
 
 func (x *HeaderForwardingRules) ProtoReflect() protoreflect.Message {
-	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[1]
+	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -376,7 +448,7 @@ func (x *HeaderForwardingRules) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use HeaderForwardingRules.ProtoReflect.Descriptor instead.
 func (*HeaderForwardingRules) Descriptor() ([]byte, []int) {
-	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{1}
+	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *HeaderForwardingRules) GetAllowedHeaders() *v32.ListStringMatcher {
@@ -410,7 +482,7 @@ type ExtProcPerRoute struct {
 func (x *ExtProcPerRoute) Reset() {
 	*x = ExtProcPerRoute{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[2]
+		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -423,7 +495,7 @@ func (x *ExtProcPerRoute) String() string {
 func (*ExtProcPerRoute) ProtoMessage() {}
 
 func (x *ExtProcPerRoute) ProtoReflect() protoreflect.Message {
-	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[2]
+	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -436,7 +508,7 @@ func (x *ExtProcPerRoute) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExtProcPerRoute.ProtoReflect.Descriptor instead.
 func (*ExtProcPerRoute) Descriptor() ([]byte, []int) {
-	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{2}
+	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{3}
 }
 
 func (m *ExtProcPerRoute) GetOverride() isExtProcPerRoute_Override {
@@ -482,7 +554,7 @@ func (*ExtProcPerRoute_Disabled) isExtProcPerRoute_Override() {}
 func (*ExtProcPerRoute_Overrides) isExtProcPerRoute_Override() {}
 
 // Overrides that may be set on a per-route basis
-// [#next-free-field: 6]
+// [#next-free-field: 7]
 type ExtProcOverrides struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -503,12 +575,18 @@ type ExtProcOverrides struct {
 	ResponseAttributes []string `protobuf:"bytes,4,rep,name=response_attributes,json=responseAttributes,proto3" json:"response_attributes,omitempty"`
 	// Set a different gRPC service for this route than the default.
 	GrpcService *v3.GrpcService `protobuf:"bytes,5,opt,name=grpc_service,json=grpcService,proto3" json:"grpc_service,omitempty"`
+	// Options related to the sending and receiving of dynamic metadata.
+	// Lists of forwarding and receiving namespaces will be overridden in their entirety,
+	// meaning the most-specific config that specifies this override will be the final
+	// config used. It is the prerogative of the control plane to ensure this
+	// most-specific config contains the correct final overrides.
+	MetadataOptions *MetadataOptions `protobuf:"bytes,6,opt,name=metadata_options,json=metadataOptions,proto3" json:"metadata_options,omitempty"`
 }
 
 func (x *ExtProcOverrides) Reset() {
 	*x = ExtProcOverrides{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[3]
+		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -521,7 +599,7 @@ func (x *ExtProcOverrides) String() string {
 func (*ExtProcOverrides) ProtoMessage() {}
 
 func (x *ExtProcOverrides) ProtoReflect() protoreflect.Message {
-	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[3]
+	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -534,7 +612,7 @@ func (x *ExtProcOverrides) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ExtProcOverrides.ProtoReflect.Descriptor instead.
 func (*ExtProcOverrides) Descriptor() ([]byte, []int) {
-	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{3}
+	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *ExtProcOverrides) GetProcessingMode() *ProcessingMode {
@@ -572,6 +650,74 @@ func (x *ExtProcOverrides) GetGrpcService() *v3.GrpcService {
 	return nil
 }
 
+func (x *ExtProcOverrides) GetMetadataOptions() *MetadataOptions {
+	if x != nil {
+		return x.MetadataOptions
+	}
+	return nil
+}
+
+type MetadataOptions_MetadataNamespaces struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Specifies a list of metadata namespaces whose values, if present,
+	// will be passed to the ext_proc service as an opaque *protobuf::Struct*.
+	Untyped []string `protobuf:"bytes,1,rep,name=untyped,proto3" json:"untyped,omitempty"`
+	// Specifies a list of metadata namespaces whose values, if present,
+	// will be passed to the ext_proc service as a *protobuf::Any*. This allows
+	// envoy and the external processing server to share the protobuf message
+	// definition for safe parsing.
+	Typed []string `protobuf:"bytes,2,rep,name=typed,proto3" json:"typed,omitempty"`
+}
+
+func (x *MetadataOptions_MetadataNamespaces) Reset() {
+	*x = MetadataOptions_MetadataNamespaces{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *MetadataOptions_MetadataNamespaces) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*MetadataOptions_MetadataNamespaces) ProtoMessage() {}
+
+func (x *MetadataOptions_MetadataNamespaces) ProtoReflect() protoreflect.Message {
+	mi := &file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use MetadataOptions_MetadataNamespaces.ProtoReflect.Descriptor instead.
+func (*MetadataOptions_MetadataNamespaces) Descriptor() ([]byte, []int) {
+	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP(), []int{1, 0}
+}
+
+func (x *MetadataOptions_MetadataNamespaces) GetUntyped() []string {
+	if x != nil {
+		return x.Untyped
+	}
+	return nil
+}
+
+func (x *MetadataOptions_MetadataNamespaces) GetTyped() []string {
+	if x != nil {
+		return x.Typed
+	}
+	return nil
+}
+
 var File_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto protoreflect.FileDescriptor
 
 var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDesc = []byte{
@@ -601,7 +747,7 @@ var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDesc = []by
 	0x64, 0x70, 0x61, 0x2f, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2f,
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@@ -664,50 +810,85 @@ var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDesc = []by
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@@ -734,37 +915,43 @@ func file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescGZIP()
 	return file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDescData
 }
 
-var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
 var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_goTypes = []interface{}{
-	(*ExternalProcessor)(nil),       // 0: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor
-	(*HeaderForwardingRules)(nil),   // 1: envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules
-	(*ExtProcPerRoute)(nil),         // 2: envoy.extensions.filters.http.ext_proc.v3.ExtProcPerRoute
-	(*ExtProcOverrides)(nil),        // 3: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides
-	(*v3.GrpcService)(nil),          // 4: envoy.config.core.v3.GrpcService
-	(*ProcessingMode)(nil),          // 5: envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
-	(*duration.Duration)(nil),       // 6: google.protobuf.Duration
-	(*v31.HeaderMutationRules)(nil), // 7: envoy.config.common.mutation_rules.v3.HeaderMutationRules
-	(*_struct.Struct)(nil),          // 8: google.protobuf.Struct
-	(*v32.ListStringMatcher)(nil),   // 9: envoy.type.matcher.v3.ListStringMatcher
+	(*ExternalProcessor)(nil),                  // 0: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor
+	(*MetadataOptions)(nil),                    // 1: envoy.extensions.filters.http.ext_proc.v3.MetadataOptions
+	(*HeaderForwardingRules)(nil),              // 2: envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules
+	(*ExtProcPerRoute)(nil),                    // 3: envoy.extensions.filters.http.ext_proc.v3.ExtProcPerRoute
+	(*ExtProcOverrides)(nil),                   // 4: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides
+	(*MetadataOptions_MetadataNamespaces)(nil), // 5: envoy.extensions.filters.http.ext_proc.v3.MetadataOptions.MetadataNamespaces
+	(*v3.GrpcService)(nil),                     // 6: envoy.config.core.v3.GrpcService
+	(*ProcessingMode)(nil),                     // 7: envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
+	(*duration.Duration)(nil),                  // 8: google.protobuf.Duration
+	(*v31.HeaderMutationRules)(nil),            // 9: envoy.config.common.mutation_rules.v3.HeaderMutationRules
+	(*_struct.Struct)(nil),                     // 10: google.protobuf.Struct
+	(*v32.ListStringMatcher)(nil),              // 11: envoy.type.matcher.v3.ListStringMatcher
 }
 var file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_depIdxs = []int32{
-	4,  // 0: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.grpc_service:type_name -> envoy.config.core.v3.GrpcService
-	5,  // 1: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.processing_mode:type_name -> envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
-	6,  // 2: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.message_timeout:type_name -> google.protobuf.Duration
-	7,  // 3: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.mutation_rules:type_name -> envoy.config.common.mutation_rules.v3.HeaderMutationRules
-	6,  // 4: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.max_message_timeout:type_name -> google.protobuf.Duration
-	1,  // 5: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.forward_rules:type_name -> envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules
-	8,  // 6: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.filter_metadata:type_name -> google.protobuf.Struct
-	9,  // 7: envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules.allowed_headers:type_name -> envoy.type.matcher.v3.ListStringMatcher
-	9,  // 8: envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules.disallowed_headers:type_name -> envoy.type.matcher.v3.ListStringMatcher
-	3,  // 9: envoy.extensions.filters.http.ext_proc.v3.ExtProcPerRoute.overrides:type_name -> envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides
-	5,  // 10: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides.processing_mode:type_name -> envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
-	4,  // 11: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides.grpc_service:type_name -> envoy.config.core.v3.GrpcService
-	12, // [12:12] is the sub-list for method output_type
-	12, // [12:12] is the sub-list for method input_type
-	12, // [12:12] is the sub-list for extension type_name
-	12, // [12:12] is the sub-list for extension extendee
-	0,  // [0:12] is the sub-list for field type_name
+	6,  // 0: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.grpc_service:type_name -> envoy.config.core.v3.GrpcService
+	7,  // 1: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.processing_mode:type_name -> envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
+	8,  // 2: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.message_timeout:type_name -> google.protobuf.Duration
+	9,  // 3: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.mutation_rules:type_name -> envoy.config.common.mutation_rules.v3.HeaderMutationRules
+	8,  // 4: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.max_message_timeout:type_name -> google.protobuf.Duration
+	2,  // 5: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.forward_rules:type_name -> envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules
+	10, // 6: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.filter_metadata:type_name -> google.protobuf.Struct
+	1,  // 7: envoy.extensions.filters.http.ext_proc.v3.ExternalProcessor.metadata_options:type_name -> envoy.extensions.filters.http.ext_proc.v3.MetadataOptions
+	5,  // 8: envoy.extensions.filters.http.ext_proc.v3.MetadataOptions.forwarding_namespaces:type_name -> envoy.extensions.filters.http.ext_proc.v3.MetadataOptions.MetadataNamespaces
+	5,  // 9: envoy.extensions.filters.http.ext_proc.v3.MetadataOptions.receiving_namespaces:type_name -> envoy.extensions.filters.http.ext_proc.v3.MetadataOptions.MetadataNamespaces
+	11, // 10: envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules.allowed_headers:type_name -> envoy.type.matcher.v3.ListStringMatcher
+	11, // 11: envoy.extensions.filters.http.ext_proc.v3.HeaderForwardingRules.disallowed_headers:type_name -> envoy.type.matcher.v3.ListStringMatcher
+	4,  // 12: envoy.extensions.filters.http.ext_proc.v3.ExtProcPerRoute.overrides:type_name -> envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides
+	7,  // 13: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides.processing_mode:type_name -> envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
+	6,  // 14: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides.grpc_service:type_name -> envoy.config.core.v3.GrpcService
+	1,  // 15: envoy.extensions.filters.http.ext_proc.v3.ExtProcOverrides.metadata_options:type_name -> envoy.extensions.filters.http.ext_proc.v3.MetadataOptions
+	16, // [16:16] is the sub-list for method output_type
+	16, // [16:16] is the sub-list for method input_type
+	16, // [16:16] is the sub-list for extension type_name
+	16, // [16:16] is the sub-list for extension extendee
+	0,  // [0:16] is the sub-list for field type_name
 }
 
 func init() { file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_init() }
@@ -787,7 +974,7 @@ func file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_init() {
 			}
 		}
 		file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*HeaderForwardingRules); i {
+			switch v := v.(*MetadataOptions); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -799,7 +986,7 @@ func file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_init() {
 			}
 		}
 		file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ExtProcPerRoute); i {
+			switch v := v.(*HeaderForwardingRules); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -811,6 +998,18 @@ func file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_init() {
 			}
 		}
 		file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ExtProcPerRoute); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*ExtProcOverrides); i {
 			case 0:
 				return &v.state
@@ -822,8 +1021,20 @@ func file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_init() {
 				return nil
 			}
 		}
+		file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MetadataOptions_MetadataNamespaces); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
-	file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[2].OneofWrappers = []interface{}{
+	file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_msgTypes[3].OneofWrappers = []interface{}{
 		(*ExtProcPerRoute_Disabled)(nil),
 		(*ExtProcPerRoute_Overrides)(nil),
 	}
@@ -833,7 +1044,7 @@ func file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_envoy_extensions_filters_http_ext_proc_v3_ext_proc_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   4,
+			NumMessages:   6,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.validate.go b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.validate.go
index 6fcc3fcc4..e5fcb8025 100755
--- a/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.validate.go
+++ b/envoy/extensions/filters/http/ext_proc/v3/ext_proc.pb.validate.go
@@ -288,6 +288,35 @@ func (m *ExternalProcessor) validate(all bool) error {
 
 	// no validation rules for DisableImmediateResponse
 
+	if all {
+		switch v := interface{}(m.GetMetadataOptions()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, ExternalProcessorValidationError{
+					field:  "MetadataOptions",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, ExternalProcessorValidationError{
+					field:  "MetadataOptions",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetMetadataOptions()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return ExternalProcessorValidationError{
+				field:  "MetadataOptions",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
 	if len(errors) > 0 {
 		return ExternalProcessorMultiError(errors)
 	}
@@ -368,6 +397,164 @@ var _ interface {
 	ErrorName() string
 } = ExternalProcessorValidationError{}
 
+// Validate checks the field values on MetadataOptions with the rules defined
+// in the proto definition for this message. If any rules are violated, the
+// first error encountered is returned, or nil if there are no violations.
+func (m *MetadataOptions) Validate() error {
+	return m.validate(false)
+}
+
+// ValidateAll checks the field values on MetadataOptions with the rules
+// defined in the proto definition for this message. If any rules are
+// violated, the result is a list of violation errors wrapped in
+// MetadataOptionsMultiError, or nil if none found.
+func (m *MetadataOptions) ValidateAll() error {
+	return m.validate(true)
+}
+
+func (m *MetadataOptions) validate(all bool) error {
+	if m == nil {
+		return nil
+	}
+
+	var errors []error
+
+	if all {
+		switch v := interface{}(m.GetForwardingNamespaces()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, MetadataOptionsValidationError{
+					field:  "ForwardingNamespaces",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, MetadataOptionsValidationError{
+					field:  "ForwardingNamespaces",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetForwardingNamespaces()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return MetadataOptionsValidationError{
+				field:  "ForwardingNamespaces",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
+	if all {
+		switch v := interface{}(m.GetReceivingNamespaces()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, MetadataOptionsValidationError{
+					field:  "ReceivingNamespaces",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, MetadataOptionsValidationError{
+					field:  "ReceivingNamespaces",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetReceivingNamespaces()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return MetadataOptionsValidationError{
+				field:  "ReceivingNamespaces",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
+	if len(errors) > 0 {
+		return MetadataOptionsMultiError(errors)
+	}
+
+	return nil
+}
+
+// MetadataOptionsMultiError is an error wrapping multiple validation errors
+// returned by MetadataOptions.ValidateAll() if the designated constraints
+// aren't met.
+type MetadataOptionsMultiError []error
+
+// Error returns a concatenation of all the error messages it wraps.
+func (m MetadataOptionsMultiError) Error() string {
+	var msgs []string
+	for _, err := range m {
+		msgs = append(msgs, err.Error())
+	}
+	return strings.Join(msgs, "; ")
+}
+
+// AllErrors returns a list of validation violation errors.
+func (m MetadataOptionsMultiError) AllErrors() []error { return m }
+
+// MetadataOptionsValidationError is the validation error returned by
+// MetadataOptions.Validate if the designated constraints aren't met.
+type MetadataOptionsValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e MetadataOptionsValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e MetadataOptionsValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e MetadataOptionsValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e MetadataOptionsValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e MetadataOptionsValidationError) ErrorName() string { return "MetadataOptionsValidationError" }
+
+// Error satisfies the builtin error interface
+func (e MetadataOptionsValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sMetadataOptions.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = MetadataOptionsValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = MetadataOptionsValidationError{}
+
 // Validate checks the field values on HeaderForwardingRules with the rules
 // defined in the proto definition for this message. If any rules are
 // violated, the first error encountered is returned, or nil if there are no violations.
@@ -792,6 +979,35 @@ func (m *ExtProcOverrides) validate(all bool) error {
 		}
 	}
 
+	if all {
+		switch v := interface{}(m.GetMetadataOptions()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, ExtProcOverridesValidationError{
+					field:  "MetadataOptions",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, ExtProcOverridesValidationError{
+					field:  "MetadataOptions",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetMetadataOptions()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return ExtProcOverridesValidationError{
+				field:  "MetadataOptions",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
 	if len(errors) > 0 {
 		return ExtProcOverridesMultiError(errors)
 	}
@@ -869,3 +1085,108 @@ var _ interface {
 	Cause() error
 	ErrorName() string
 } = ExtProcOverridesValidationError{}
+
+// Validate checks the field values on MetadataOptions_MetadataNamespaces with
+// the rules defined in the proto definition for this message. If any rules
+// are violated, the first error encountered is returned, or nil if there are
+// no violations.
+func (m *MetadataOptions_MetadataNamespaces) Validate() error {
+	return m.validate(false)
+}
+
+// ValidateAll checks the field values on MetadataOptions_MetadataNamespaces
+// with the rules defined in the proto definition for this message. If any
+// rules are violated, the result is a list of violation errors wrapped in
+// MetadataOptions_MetadataNamespacesMultiError, or nil if none found.
+func (m *MetadataOptions_MetadataNamespaces) ValidateAll() error {
+	return m.validate(true)
+}
+
+func (m *MetadataOptions_MetadataNamespaces) validate(all bool) error {
+	if m == nil {
+		return nil
+	}
+
+	var errors []error
+
+	if len(errors) > 0 {
+		return MetadataOptions_MetadataNamespacesMultiError(errors)
+	}
+
+	return nil
+}
+
+// MetadataOptions_MetadataNamespacesMultiError is an error wrapping multiple
+// validation errors returned by
+// MetadataOptions_MetadataNamespaces.ValidateAll() if the designated
+// constraints aren't met.
+type MetadataOptions_MetadataNamespacesMultiError []error
+
+// Error returns a concatenation of all the error messages it wraps.
+func (m MetadataOptions_MetadataNamespacesMultiError) Error() string {
+	var msgs []string
+	for _, err := range m {
+		msgs = append(msgs, err.Error())
+	}
+	return strings.Join(msgs, "; ")
+}
+
+// AllErrors returns a list of validation violation errors.
+func (m MetadataOptions_MetadataNamespacesMultiError) AllErrors() []error { return m }
+
+// MetadataOptions_MetadataNamespacesValidationError is the validation error
+// returned by MetadataOptions_MetadataNamespaces.Validate if the designated
+// constraints aren't met.
+type MetadataOptions_MetadataNamespacesValidationError struct {
+	field  string
+	reason string
+	cause  error
+	key    bool
+}
+
+// Field function returns field value.
+func (e MetadataOptions_MetadataNamespacesValidationError) Field() string { return e.field }
+
+// Reason function returns reason value.
+func (e MetadataOptions_MetadataNamespacesValidationError) Reason() string { return e.reason }
+
+// Cause function returns cause value.
+func (e MetadataOptions_MetadataNamespacesValidationError) Cause() error { return e.cause }
+
+// Key function returns key value.
+func (e MetadataOptions_MetadataNamespacesValidationError) Key() bool { return e.key }
+
+// ErrorName returns error name.
+func (e MetadataOptions_MetadataNamespacesValidationError) ErrorName() string {
+	return "MetadataOptions_MetadataNamespacesValidationError"
+}
+
+// Error satisfies the builtin error interface
+func (e MetadataOptions_MetadataNamespacesValidationError) Error() string {
+	cause := ""
+	if e.cause != nil {
+		cause = fmt.Sprintf(" | caused by: %v", e.cause)
+	}
+
+	key := ""
+	if e.key {
+		key = "key for "
+	}
+
+	return fmt.Sprintf(
+		"invalid %sMetadataOptions_MetadataNamespaces.%s: %s%s",
+		key,
+		e.field,
+		e.reason,
+		cause)
+}
+
+var _ error = MetadataOptions_MetadataNamespacesValidationError{}
+
+var _ interface {
+	Field() string
+	Reason() string
+	Key() bool
+	Cause() error
+	ErrorName() string
+} = MetadataOptions_MetadataNamespacesValidationError{}
diff --git a/envoy/extensions/filters/http/ext_proc/v3/ext_proc_vtproto.pb.go b/envoy/extensions/filters/http/ext_proc/v3/ext_proc_vtproto.pb.go
index 24aa836e3..5f6cc7a40 100755
--- a/envoy/extensions/filters/http/ext_proc/v3/ext_proc_vtproto.pb.go
+++ b/envoy/extensions/filters/http/ext_proc/v3/ext_proc_vtproto.pb.go
@@ -49,6 +49,18 @@ func (m *ExternalProcessor) MarshalToSizedBufferVTStrict(dAtA []byte) (int, erro
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.MetadataOptions != nil {
+		size, err := m.MetadataOptions.MarshalToSizedBufferVTStrict(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x1
+		i--
+		dAtA[i] = 0x82
+	}
 	if m.DisableImmediateResponse {
 		i--
 		if m.DisableImmediateResponse {
@@ -221,6 +233,110 @@ func (m *ExternalProcessor) MarshalToSizedBufferVTStrict(dAtA []byte) (int, erro
 	return len(dAtA) - i, nil
 }
 
+func (m *MetadataOptions_MetadataNamespaces) MarshalVTStrict() (dAtA []byte, err error) {
+	if m == nil {
+		return nil, nil
+	}
+	size := m.SizeVT()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBufferVTStrict(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *MetadataOptions_MetadataNamespaces) MarshalToVTStrict(dAtA []byte) (int, error) {
+	size := m.SizeVT()
+	return m.MarshalToSizedBufferVTStrict(dAtA[:size])
+}
+
+func (m *MetadataOptions_MetadataNamespaces) MarshalToSizedBufferVTStrict(dAtA []byte) (int, error) {
+	if m == nil {
+		return 0, nil
+	}
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.unknownFields != nil {
+		i -= len(m.unknownFields)
+		copy(dAtA[i:], m.unknownFields)
+	}
+	if len(m.Typed) > 0 {
+		for iNdEx := len(m.Typed) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.Typed[iNdEx])
+			copy(dAtA[i:], m.Typed[iNdEx])
+			i = encodeVarint(dAtA, i, uint64(len(m.Typed[iNdEx])))
+			i--
+			dAtA[i] = 0x12
+		}
+	}
+	if len(m.Untyped) > 0 {
+		for iNdEx := len(m.Untyped) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.Untyped[iNdEx])
+			copy(dAtA[i:], m.Untyped[iNdEx])
+			i = encodeVarint(dAtA, i, uint64(len(m.Untyped[iNdEx])))
+			i--
+			dAtA[i] = 0xa
+		}
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *MetadataOptions) MarshalVTStrict() (dAtA []byte, err error) {
+	if m == nil {
+		return nil, nil
+	}
+	size := m.SizeVT()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBufferVTStrict(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *MetadataOptions) MarshalToVTStrict(dAtA []byte) (int, error) {
+	size := m.SizeVT()
+	return m.MarshalToSizedBufferVTStrict(dAtA[:size])
+}
+
+func (m *MetadataOptions) MarshalToSizedBufferVTStrict(dAtA []byte) (int, error) {
+	if m == nil {
+		return 0, nil
+	}
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.unknownFields != nil {
+		i -= len(m.unknownFields)
+		copy(dAtA[i:], m.unknownFields)
+	}
+	if m.ReceivingNamespaces != nil {
+		size, err := m.ReceivingNamespaces.MarshalToSizedBufferVTStrict(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x12
+	}
+	if m.ForwardingNamespaces != nil {
+		size, err := m.ForwardingNamespaces.MarshalToSizedBufferVTStrict(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *HeaderForwardingRules) MarshalVTStrict() (dAtA []byte, err error) {
 	if m == nil {
 		return nil, nil
@@ -411,6 +527,16 @@ func (m *ExtProcOverrides) MarshalToSizedBufferVTStrict(dAtA []byte) (int, error
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.MetadataOptions != nil {
+		size, err := m.MetadataOptions.MarshalToSizedBufferVTStrict(dAtA[:i])
+		if err != nil {
+			return 0, err
+		}
+		i -= size
+		i = encodeVarint(dAtA, i, uint64(size))
+		i--
+		dAtA[i] = 0x32
+	}
 	if m.GrpcService != nil {
 		if vtmsg, ok := interface{}(m.GrpcService).(interface {
 			MarshalToSizedBufferVTStrict([]byte) (int, error)
@@ -551,6 +677,50 @@ func (m *ExternalProcessor) SizeVT() (n int) {
 	if m.DisableImmediateResponse {
 		n += 2
 	}
+	if m.MetadataOptions != nil {
+		l = m.MetadataOptions.SizeVT()
+		n += 2 + l + sov(uint64(l))
+	}
+	n += len(m.unknownFields)
+	return n
+}
+
+func (m *MetadataOptions_MetadataNamespaces) SizeVT() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if len(m.Untyped) > 0 {
+		for _, s := range m.Untyped {
+			l = len(s)
+			n += 1 + l + sov(uint64(l))
+		}
+	}
+	if len(m.Typed) > 0 {
+		for _, s := range m.Typed {
+			l = len(s)
+			n += 1 + l + sov(uint64(l))
+		}
+	}
+	n += len(m.unknownFields)
+	return n
+}
+
+func (m *MetadataOptions) SizeVT() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.ForwardingNamespaces != nil {
+		l = m.ForwardingNamespaces.SizeVT()
+		n += 1 + l + sov(uint64(l))
+	}
+	if m.ReceivingNamespaces != nil {
+		l = m.ReceivingNamespaces.SizeVT()
+		n += 1 + l + sov(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
@@ -654,6 +824,10 @@ func (m *ExtProcOverrides) SizeVT() (n int) {
 		}
 		n += 1 + l + sov(uint64(l))
 	}
+	if m.MetadataOptions != nil {
+		l = m.MetadataOptions.SizeVT()
+		n += 1 + l + sov(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }
diff --git a/envoy/service/ext_proc/v3/external_processor.pb.go b/envoy/service/ext_proc/v3/external_processor.pb.go
index 400229ed9..190f8c2fa 100755
--- a/envoy/service/ext_proc/v3/external_processor.pb.go
+++ b/envoy/service/ext_proc/v3/external_processor.pb.go
@@ -9,8 +9,8 @@ package ext_procv3
 import (
 	context "context"
 	_ "github.com/cncf/xds/go/udpa/annotations"
-	v31 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
-	v3 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/ext_proc/v3"
+	v3 "github.com/envoyproxy/go-control-plane/envoy/config/core/v3"
+	v31 "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/ext_proc/v3"
 	v32 "github.com/envoyproxy/go-control-plane/envoy/type/v3"
 	_ "github.com/envoyproxy/protoc-gen-validate/validate"
 	duration "github.com/golang/protobuf/ptypes/duration"
@@ -94,7 +94,7 @@ func (CommonResponse_ResponseStatus) EnumDescriptor() ([]byte, []int) {
 
 // This represents the different types of messages that Envoy can send
 // to an external processing server.
-// [#next-free-field: 8]
+// [#next-free-field: 9]
 type ProcessingRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -124,6 +124,8 @@ type ProcessingRequest struct {
 	//	*ProcessingRequest_RequestTrailers
 	//	*ProcessingRequest_ResponseTrailers
 	Request isProcessingRequest_Request `protobuf_oneof:"request"`
+	// Dynamic metadata associated with the request.
+	MetadataContext *v3.Metadata `protobuf:"bytes,8,opt,name=metadata_context,json=metadataContext,proto3" json:"metadata_context,omitempty"`
 }
 
 func (x *ProcessingRequest) Reset() {
@@ -214,6 +216,13 @@ func (x *ProcessingRequest) GetResponseTrailers() *HttpTrailers {
 	return nil
 }
 
+func (x *ProcessingRequest) GetMetadataContext() *v3.Metadata {
+	if x != nil {
+		return x.MetadataContext
+	}
+	return nil
+}
+
 type isProcessingRequest_Request interface {
 	isProcessingRequest_Request()
 }
@@ -292,9 +301,9 @@ type ProcessingResponse struct {
 	//	*ProcessingResponse_ResponseTrailers
 	//	*ProcessingResponse_ImmediateResponse
 	Response isProcessingResponse_Response `protobuf_oneof:"response"`
-	// [#not-implemented-hide:]
-	// Optional metadata that will be emitted as dynamic metadata to be consumed by the next
-	// filter. This metadata will be placed in the namespace “envoy.filters.http.ext_proc“.
+	// Optional metadata that will be emitted as dynamic metadata to be consumed by
+	// following filters. This metadata will be placed in the namespace(s) specified by the top-level
+	// field name(s) of the struct.
 	DynamicMetadata *_struct.Struct `protobuf:"bytes,8,opt,name=dynamic_metadata,json=dynamicMetadata,proto3" json:"dynamic_metadata,omitempty"`
 	// Override how parts of the HTTP request and response are processed
 	// for the duration of this particular request/response only. Servers
@@ -306,7 +315,7 @@ type ProcessingResponse struct {
 	// :ref:`allow_mode_override
 	// <envoy_v3_api_field_extensions.filters.http.ext_proc.v3.ExternalProcessor.allow_mode_override>`
 	// is set to false.
-	ModeOverride *v3.ProcessingMode `protobuf:"bytes,9,opt,name=mode_override,json=modeOverride,proto3" json:"mode_override,omitempty"`
+	ModeOverride *v31.ProcessingMode `protobuf:"bytes,9,opt,name=mode_override,json=modeOverride,proto3" json:"mode_override,omitempty"`
 	// When ext_proc server receives a request message, in case it needs more
 	// time to process the message, it sends back a ProcessingResponse message
 	// with a new timeout value. When Envoy receives this response message,
@@ -418,7 +427,7 @@ func (x *ProcessingResponse) GetDynamicMetadata() *_struct.Struct {
 	return nil
 }
 
-func (x *ProcessingResponse) GetModeOverride() *v3.ProcessingMode {
+func (x *ProcessingResponse) GetModeOverride() *v31.ProcessingMode {
 	if x != nil {
 		return x.ModeOverride
 	}
@@ -512,7 +521,7 @@ type HttpHeaders struct {
 	// :ref:`raw_value <envoy_v3_api_field_config.core.v3.HeaderValue.raw_value>` field.
 	// When it is false, the header value is encoded in the
 	// :ref:`value <envoy_v3_api_field_config.core.v3.HeaderValue.value>` field.
-	Headers *v31.HeaderMap `protobuf:"bytes,1,opt,name=headers,proto3" json:"headers,omitempty"`
+	Headers *v3.HeaderMap `protobuf:"bytes,1,opt,name=headers,proto3" json:"headers,omitempty"`
 	// [#not-implemented-hide:]
 	// The values of properties selected by the “request_attributes“
 	// or “response_attributes“ list in the configuration. Each entry
@@ -557,7 +566,7 @@ func (*HttpHeaders) Descriptor() ([]byte, []int) {
 	return file_envoy_service_ext_proc_v3_external_processor_proto_rawDescGZIP(), []int{2}
 }
 
-func (x *HttpHeaders) GetHeaders() *v31.HeaderMap {
+func (x *HttpHeaders) GetHeaders() *v3.HeaderMap {
 	if x != nil {
 		return x.Headers
 	}
@@ -646,7 +655,7 @@ type HttpTrailers struct {
 	// :ref:`raw_value <envoy_v3_api_field_config.core.v3.HeaderValue.raw_value>` field.
 	// When it is false, the header value is encoded in the
 	// :ref:`value <envoy_v3_api_field_config.core.v3.HeaderValue.value>` field.
-	Trailers *v31.HeaderMap `protobuf:"bytes,1,opt,name=trailers,proto3" json:"trailers,omitempty"`
+	Trailers *v3.HeaderMap `protobuf:"bytes,1,opt,name=trailers,proto3" json:"trailers,omitempty"`
 }
 
 func (x *HttpTrailers) Reset() {
@@ -681,7 +690,7 @@ func (*HttpTrailers) Descriptor() ([]byte, []int) {
 	return file_envoy_service_ext_proc_v3_external_processor_proto_rawDescGZIP(), []int{4}
 }
 
-func (x *HttpTrailers) GetTrailers() *v31.HeaderMap {
+func (x *HttpTrailers) GetTrailers() *v3.HeaderMap {
 	if x != nil {
 		return x.Trailers
 	}
@@ -865,7 +874,7 @@ type CommonResponse struct {
 	// :ref:`raw_value <envoy_v3_api_field_config.core.v3.HeaderValue.raw_value>` field.
 	// When it is false, the header value is encoded in the
 	// :ref:`value <envoy_v3_api_field_config.core.v3.HeaderValue.value>` field.
-	Trailers *v31.HeaderMap `protobuf:"bytes,4,opt,name=trailers,proto3" json:"trailers,omitempty"`
+	Trailers *v3.HeaderMap `protobuf:"bytes,4,opt,name=trailers,proto3" json:"trailers,omitempty"`
 	// Clear the route cache for the current client request. This is necessary
 	// if the remote server modified headers that are used to calculate the route.
 	// This field is ignored in the response direction.
@@ -925,7 +934,7 @@ func (x *CommonResponse) GetBodyMutation() *BodyMutation {
 	return nil
 }
 
-func (x *CommonResponse) GetTrailers() *v31.HeaderMap {
+func (x *CommonResponse) GetTrailers() *v3.HeaderMap {
 	if x != nil {
 		return x.Trailers
 	}
@@ -1098,7 +1107,7 @@ type HeaderMutation struct {
 	// :ref:`raw_value <envoy_v3_api_field_config.core.v3.HeaderValue.raw_value>` field.
 	// When it is false, the header value is encoded in the
 	// :ref:`value <envoy_v3_api_field_config.core.v3.HeaderValue.value>` field.
-	SetHeaders []*v31.HeaderValueOption `protobuf:"bytes,1,rep,name=set_headers,json=setHeaders,proto3" json:"set_headers,omitempty"`
+	SetHeaders []*v3.HeaderValueOption `protobuf:"bytes,1,rep,name=set_headers,json=setHeaders,proto3" json:"set_headers,omitempty"`
 	// Remove these HTTP headers. Attempts to remove system headers --
 	// any header starting with “:“, plus “host“ -- will be ignored.
 	RemoveHeaders []string `protobuf:"bytes,2,rep,name=remove_headers,json=removeHeaders,proto3" json:"remove_headers,omitempty"`
@@ -1136,7 +1145,7 @@ func (*HeaderMutation) Descriptor() ([]byte, []int) {
 	return file_envoy_service_ext_proc_v3_external_processor_proto_rawDescGZIP(), []int{11}
 }
 
-func (x *HeaderMutation) GetSetHeaders() []*v31.HeaderValueOption {
+func (x *HeaderMutation) GetSetHeaders() []*v3.HeaderValueOption {
 	if x != nil {
 		return x.SetHeaders
 	}
@@ -1258,7 +1267,7 @@ var file_envoy_service_ext_proc_v3_external_processor_proto_rawDesc = []byte{
 	0x1a, 0x1d, 0x75, 0x64, 0x70, 0x61, 0x2f, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f,
 	0x6e, 0x73, 0x2f, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a,
 	0x17, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x61, 0x74, 0x65, 0x2f, 0x76, 0x61, 0x6c, 0x69, 0x64, 0x61,
-	0x74, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0xae, 0x04, 0x0a, 0x11, 0x50, 0x72, 0x6f,
+	0x74, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0xf9, 0x04, 0x0a, 0x11, 0x50, 0x72, 0x6f,
 	0x63, 0x65, 0x73, 0x73, 0x69, 0x6e, 0x67, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x1d,
 	0x0a, 0x0a, 0x61, 0x73, 0x79, 0x6e, 0x63, 0x5f, 0x6d, 0x6f, 0x64, 0x65, 0x18, 0x01, 0x20, 0x01,
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@@ -1292,187 +1301,192 @@ var file_envoy_service_ext_proc_v3_external_processor_proto_rawDesc = []byte{
 	0x6e, 0x76, 0x6f, 0x79, 0x2e, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2e, 0x65, 0x78, 0x74,
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 }
 
 var (
@@ -1505,12 +1519,13 @@ var file_envoy_service_ext_proc_v3_external_processor_proto_goTypes = []interfac
 	(*HeaderMutation)(nil),             // 12: envoy.service.ext_proc.v3.HeaderMutation
 	(*BodyMutation)(nil),               // 13: envoy.service.ext_proc.v3.BodyMutation
 	nil,                                // 14: envoy.service.ext_proc.v3.HttpHeaders.AttributesEntry
-	(*_struct.Struct)(nil),             // 15: google.protobuf.Struct
-	(*v3.ProcessingMode)(nil),          // 16: envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
-	(*duration.Duration)(nil),          // 17: google.protobuf.Duration
-	(*v31.HeaderMap)(nil),              // 18: envoy.config.core.v3.HeaderMap
-	(*v32.HttpStatus)(nil),             // 19: envoy.type.v3.HttpStatus
-	(*v31.HeaderValueOption)(nil),      // 20: envoy.config.core.v3.HeaderValueOption
+	(*v3.Metadata)(nil),                // 15: envoy.config.core.v3.Metadata
+	(*_struct.Struct)(nil),             // 16: google.protobuf.Struct
+	(*v31.ProcessingMode)(nil),         // 17: envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
+	(*duration.Duration)(nil),          // 18: google.protobuf.Duration
+	(*v3.HeaderMap)(nil),               // 19: envoy.config.core.v3.HeaderMap
+	(*v32.HttpStatus)(nil),             // 20: envoy.type.v3.HttpStatus
+	(*v3.HeaderValueOption)(nil),       // 21: envoy.config.core.v3.HeaderValueOption
 }
 var file_envoy_service_ext_proc_v3_external_processor_proto_depIdxs = []int32{
 	3,  // 0: envoy.service.ext_proc.v3.ProcessingRequest.request_headers:type_name -> envoy.service.ext_proc.v3.HttpHeaders
@@ -1519,38 +1534,39 @@ var file_envoy_service_ext_proc_v3_external_processor_proto_depIdxs = []int32{
 	4,  // 3: envoy.service.ext_proc.v3.ProcessingRequest.response_body:type_name -> envoy.service.ext_proc.v3.HttpBody
 	5,  // 4: envoy.service.ext_proc.v3.ProcessingRequest.request_trailers:type_name -> envoy.service.ext_proc.v3.HttpTrailers
 	5,  // 5: envoy.service.ext_proc.v3.ProcessingRequest.response_trailers:type_name -> envoy.service.ext_proc.v3.HttpTrailers
-	6,  // 6: envoy.service.ext_proc.v3.ProcessingResponse.request_headers:type_name -> envoy.service.ext_proc.v3.HeadersResponse
-	6,  // 7: envoy.service.ext_proc.v3.ProcessingResponse.response_headers:type_name -> envoy.service.ext_proc.v3.HeadersResponse
-	8,  // 8: envoy.service.ext_proc.v3.ProcessingResponse.request_body:type_name -> envoy.service.ext_proc.v3.BodyResponse
-	8,  // 9: envoy.service.ext_proc.v3.ProcessingResponse.response_body:type_name -> envoy.service.ext_proc.v3.BodyResponse
-	7,  // 10: envoy.service.ext_proc.v3.ProcessingResponse.request_trailers:type_name -> envoy.service.ext_proc.v3.TrailersResponse
-	7,  // 11: envoy.service.ext_proc.v3.ProcessingResponse.response_trailers:type_name -> envoy.service.ext_proc.v3.TrailersResponse
-	10, // 12: envoy.service.ext_proc.v3.ProcessingResponse.immediate_response:type_name -> envoy.service.ext_proc.v3.ImmediateResponse
-	15, // 13: envoy.service.ext_proc.v3.ProcessingResponse.dynamic_metadata:type_name -> google.protobuf.Struct
-	16, // 14: envoy.service.ext_proc.v3.ProcessingResponse.mode_override:type_name -> envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
-	17, // 15: envoy.service.ext_proc.v3.ProcessingResponse.override_message_timeout:type_name -> google.protobuf.Duration
-	18, // 16: envoy.service.ext_proc.v3.HttpHeaders.headers:type_name -> envoy.config.core.v3.HeaderMap
-	14, // 17: envoy.service.ext_proc.v3.HttpHeaders.attributes:type_name -> envoy.service.ext_proc.v3.HttpHeaders.AttributesEntry
-	18, // 18: envoy.service.ext_proc.v3.HttpTrailers.trailers:type_name -> envoy.config.core.v3.HeaderMap
-	9,  // 19: envoy.service.ext_proc.v3.HeadersResponse.response:type_name -> envoy.service.ext_proc.v3.CommonResponse
-	12, // 20: envoy.service.ext_proc.v3.TrailersResponse.header_mutation:type_name -> envoy.service.ext_proc.v3.HeaderMutation
-	9,  // 21: envoy.service.ext_proc.v3.BodyResponse.response:type_name -> envoy.service.ext_proc.v3.CommonResponse
-	0,  // 22: envoy.service.ext_proc.v3.CommonResponse.status:type_name -> envoy.service.ext_proc.v3.CommonResponse.ResponseStatus
-	12, // 23: envoy.service.ext_proc.v3.CommonResponse.header_mutation:type_name -> envoy.service.ext_proc.v3.HeaderMutation
-	13, // 24: envoy.service.ext_proc.v3.CommonResponse.body_mutation:type_name -> envoy.service.ext_proc.v3.BodyMutation
-	18, // 25: envoy.service.ext_proc.v3.CommonResponse.trailers:type_name -> envoy.config.core.v3.HeaderMap
-	19, // 26: envoy.service.ext_proc.v3.ImmediateResponse.status:type_name -> envoy.type.v3.HttpStatus
-	12, // 27: envoy.service.ext_proc.v3.ImmediateResponse.headers:type_name -> envoy.service.ext_proc.v3.HeaderMutation
-	11, // 28: envoy.service.ext_proc.v3.ImmediateResponse.grpc_status:type_name -> envoy.service.ext_proc.v3.GrpcStatus
-	20, // 29: envoy.service.ext_proc.v3.HeaderMutation.set_headers:type_name -> envoy.config.core.v3.HeaderValueOption
-	15, // 30: envoy.service.ext_proc.v3.HttpHeaders.AttributesEntry.value:type_name -> google.protobuf.Struct
-	1,  // 31: envoy.service.ext_proc.v3.ExternalProcessor.Process:input_type -> envoy.service.ext_proc.v3.ProcessingRequest
-	2,  // 32: envoy.service.ext_proc.v3.ExternalProcessor.Process:output_type -> envoy.service.ext_proc.v3.ProcessingResponse
-	32, // [32:33] is the sub-list for method output_type
-	31, // [31:32] is the sub-list for method input_type
-	31, // [31:31] is the sub-list for extension type_name
-	31, // [31:31] is the sub-list for extension extendee
-	0,  // [0:31] is the sub-list for field type_name
+	15, // 6: envoy.service.ext_proc.v3.ProcessingRequest.metadata_context:type_name -> envoy.config.core.v3.Metadata
+	6,  // 7: envoy.service.ext_proc.v3.ProcessingResponse.request_headers:type_name -> envoy.service.ext_proc.v3.HeadersResponse
+	6,  // 8: envoy.service.ext_proc.v3.ProcessingResponse.response_headers:type_name -> envoy.service.ext_proc.v3.HeadersResponse
+	8,  // 9: envoy.service.ext_proc.v3.ProcessingResponse.request_body:type_name -> envoy.service.ext_proc.v3.BodyResponse
+	8,  // 10: envoy.service.ext_proc.v3.ProcessingResponse.response_body:type_name -> envoy.service.ext_proc.v3.BodyResponse
+	7,  // 11: envoy.service.ext_proc.v3.ProcessingResponse.request_trailers:type_name -> envoy.service.ext_proc.v3.TrailersResponse
+	7,  // 12: envoy.service.ext_proc.v3.ProcessingResponse.response_trailers:type_name -> envoy.service.ext_proc.v3.TrailersResponse
+	10, // 13: envoy.service.ext_proc.v3.ProcessingResponse.immediate_response:type_name -> envoy.service.ext_proc.v3.ImmediateResponse
+	16, // 14: envoy.service.ext_proc.v3.ProcessingResponse.dynamic_metadata:type_name -> google.protobuf.Struct
+	17, // 15: envoy.service.ext_proc.v3.ProcessingResponse.mode_override:type_name -> envoy.extensions.filters.http.ext_proc.v3.ProcessingMode
+	18, // 16: envoy.service.ext_proc.v3.ProcessingResponse.override_message_timeout:type_name -> google.protobuf.Duration
+	19, // 17: envoy.service.ext_proc.v3.HttpHeaders.headers:type_name -> envoy.config.core.v3.HeaderMap
+	14, // 18: envoy.service.ext_proc.v3.HttpHeaders.attributes:type_name -> envoy.service.ext_proc.v3.HttpHeaders.AttributesEntry
+	19, // 19: envoy.service.ext_proc.v3.HttpTrailers.trailers:type_name -> envoy.config.core.v3.HeaderMap
+	9,  // 20: envoy.service.ext_proc.v3.HeadersResponse.response:type_name -> envoy.service.ext_proc.v3.CommonResponse
+	12, // 21: envoy.service.ext_proc.v3.TrailersResponse.header_mutation:type_name -> envoy.service.ext_proc.v3.HeaderMutation
+	9,  // 22: envoy.service.ext_proc.v3.BodyResponse.response:type_name -> envoy.service.ext_proc.v3.CommonResponse
+	0,  // 23: envoy.service.ext_proc.v3.CommonResponse.status:type_name -> envoy.service.ext_proc.v3.CommonResponse.ResponseStatus
+	12, // 24: envoy.service.ext_proc.v3.CommonResponse.header_mutation:type_name -> envoy.service.ext_proc.v3.HeaderMutation
+	13, // 25: envoy.service.ext_proc.v3.CommonResponse.body_mutation:type_name -> envoy.service.ext_proc.v3.BodyMutation
+	19, // 26: envoy.service.ext_proc.v3.CommonResponse.trailers:type_name -> envoy.config.core.v3.HeaderMap
+	20, // 27: envoy.service.ext_proc.v3.ImmediateResponse.status:type_name -> envoy.type.v3.HttpStatus
+	12, // 28: envoy.service.ext_proc.v3.ImmediateResponse.headers:type_name -> envoy.service.ext_proc.v3.HeaderMutation
+	11, // 29: envoy.service.ext_proc.v3.ImmediateResponse.grpc_status:type_name -> envoy.service.ext_proc.v3.GrpcStatus
+	21, // 30: envoy.service.ext_proc.v3.HeaderMutation.set_headers:type_name -> envoy.config.core.v3.HeaderValueOption
+	16, // 31: envoy.service.ext_proc.v3.HttpHeaders.AttributesEntry.value:type_name -> google.protobuf.Struct
+	1,  // 32: envoy.service.ext_proc.v3.ExternalProcessor.Process:input_type -> envoy.service.ext_proc.v3.ProcessingRequest
+	2,  // 33: envoy.service.ext_proc.v3.ExternalProcessor.Process:output_type -> envoy.service.ext_proc.v3.ProcessingResponse
+	33, // [33:34] is the sub-list for method output_type
+	32, // [32:33] is the sub-list for method input_type
+	32, // [32:32] is the sub-list for extension type_name
+	32, // [32:32] is the sub-list for extension extendee
+	0,  // [0:32] is the sub-list for field type_name
 }
 
 func init() { file_envoy_service_ext_proc_v3_external_processor_proto_init() }
diff --git a/envoy/service/ext_proc/v3/external_processor.pb.validate.go b/envoy/service/ext_proc/v3/external_processor.pb.validate.go
index d498592c6..b6c2b5aad 100755
--- a/envoy/service/ext_proc/v3/external_processor.pb.validate.go
+++ b/envoy/service/ext_proc/v3/external_processor.pb.validate.go
@@ -60,6 +60,35 @@ func (m *ProcessingRequest) validate(all bool) error {
 
 	// no validation rules for AsyncMode
 
+	if all {
+		switch v := interface{}(m.GetMetadataContext()).(type) {
+		case interface{ ValidateAll() error }:
+			if err := v.ValidateAll(); err != nil {
+				errors = append(errors, ProcessingRequestValidationError{
+					field:  "MetadataContext",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		case interface{ Validate() error }:
+			if err := v.Validate(); err != nil {
+				errors = append(errors, ProcessingRequestValidationError{
+					field:  "MetadataContext",
+					reason: "embedded message failed validation",
+					cause:  err,
+				})
+			}
+		}
+	} else if v, ok := interface{}(m.GetMetadataContext()).(interface{ Validate() error }); ok {
+		if err := v.Validate(); err != nil {
+			return ProcessingRequestValidationError{
+				field:  "MetadataContext",
+				reason: "embedded message failed validation",
+				cause:  err,
+			}
+		}
+	}
+
 	oneofRequestPresent := false
 	switch v := m.Request.(type) {
 	case *ProcessingRequest_RequestHeaders:
diff --git a/envoy/service/ext_proc/v3/external_processor_vtproto.pb.go b/envoy/service/ext_proc/v3/external_processor_vtproto.pb.go
index 9ab44bec6..4fc008d74 100755
--- a/envoy/service/ext_proc/v3/external_processor_vtproto.pb.go
+++ b/envoy/service/ext_proc/v3/external_processor_vtproto.pb.go
@@ -50,6 +50,28 @@ func (m *ProcessingRequest) MarshalToSizedBufferVTStrict(dAtA []byte) (int, erro
 		i -= len(m.unknownFields)
 		copy(dAtA[i:], m.unknownFields)
 	}
+	if m.MetadataContext != nil {
+		if vtmsg, ok := interface{}(m.MetadataContext).(interface {
+			MarshalToSizedBufferVTStrict([]byte) (int, error)
+		}); ok {
+			size, err := vtmsg.MarshalToSizedBufferVTStrict(dAtA[:i])
+			if err != nil {
+				return 0, err
+			}
+			i -= size
+			i = encodeVarint(dAtA, i, uint64(size))
+		} else {
+			encoded, err := proto.Marshal(m.MetadataContext)
+			if err != nil {
+				return 0, err
+			}
+			i -= len(encoded)
+			copy(dAtA[i:], encoded)
+			i = encodeVarint(dAtA, i, uint64(len(encoded)))
+		}
+		i--
+		dAtA[i] = 0x42
+	}
 	if msg, ok := m.Request.(*ProcessingRequest_ResponseTrailers); ok {
 		size, err := msg.MarshalToSizedBufferVTStrict(dAtA[:i])
 		if err != nil {
@@ -1181,6 +1203,16 @@ func (m *ProcessingRequest) SizeVT() (n int) {
 	if vtmsg, ok := m.Request.(interface{ SizeVT() int }); ok {
 		n += vtmsg.SizeVT()
 	}
+	if m.MetadataContext != nil {
+		if size, ok := interface{}(m.MetadataContext).(interface {
+			SizeVT() int
+		}); ok {
+			l = size.SizeVT()
+		} else {
+			l = proto.Size(m.MetadataContext)
+		}
+		n += 1 + l + sov(uint64(l))
+	}
 	n += len(m.unknownFields)
 	return n
 }