link: add INNER_PROTO_INHERIT support for Geneve

link.go

@@ -1022,16 +1022,17 @@ func (v *VrfSlave) SlaveType() string {
 // https://github.com/torvalds/linux/blob/47ec5303d73ea344e84f46660fff693c57641386/drivers/net/geneve.c#L1209-L1223
 type Geneve struct {
 	LinkAttrs
-	ID             uint32 // vni
-	Remote         net.IP
-	Ttl            uint8
-	Tos            uint8
-	Dport          uint16
-	UdpCsum        uint8
-	UdpZeroCsum6Tx uint8
-	UdpZeroCsum6Rx uint8
-	Link           uint32
-	FlowBased      bool
+	ID                uint32 // vni
+	Remote            net.IP
+	Ttl               uint8
+	Tos               uint8
+	Dport             uint16
+	UdpCsum           uint8
+	UdpZeroCsum6Tx    uint8
+	UdpZeroCsum6Rx    uint8
+	Link              uint32
+	FlowBased         bool
+	InnerProtoInherit bool
 }
 
 func (geneve *Geneve) Attrs() *LinkAttrs {

link_linux.go

@@ -2997,6 +2997,10 @@ func linkFlags(rawFlags uint32) net.Flags {
 func addGeneveAttrs(geneve *Geneve, linkInfo *nl.RtAttr) {
 	data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
 
+	if geneve.InnerProtoInherit {
+		data.AddRtAttr(nl.IFLA_GENEVE_INNER_PROTO_INHERIT, []byte{})
+	}
+
 	if geneve.FlowBased {
 		geneve.ID = 0
 		data.AddRtAttr(nl.IFLA_GENEVE_COLLECT_METADATA, []byte{})
@@ -3043,6 +3047,8 @@ func parseGeneveData(link Link, data []syscall.NetlinkRouteAttr) {
 			geneve.Tos = uint8(datum.Value[0])
 		case nl.IFLA_GENEVE_COLLECT_METADATA:
 			geneve.FlowBased = true
+		case nl.IFLA_GENEVE_INNER_PROTO_INHERIT:
+			geneve.InnerProtoInherit = true
 		}
 	}
 }

link_test.go

@@ -389,6 +389,10 @@ func compareGeneve(t *testing.T, expected, actual *Geneve) {
 		t.Fatal("Geneve.FlowBased doesn't match")
 	}
 
+	if actual.InnerProtoInherit != expected.InnerProtoInherit {
+		t.Fatal("Geneve.InnerProtoInherit doesn't match")
+	}
+
 	// TODO: we should implement the rest of the geneve methods
 }
 

nl/link_linux.go

@@ -227,7 +227,10 @@ const (
 	IFLA_GENEVE_UDP_ZERO_CSUM6_TX
 	IFLA_GENEVE_UDP_ZERO_CSUM6_RX
 	IFLA_GENEVE_LABEL
-	IFLA_GENEVE_MAX = IFLA_GENEVE_LABEL
+	IFLA_GENEVE_TTL_INHERIT
+	IFLA_GENEVE_DF
+	IFLA_GENEVE_INNER_PROTO_INHERIT
+	IFLA_GENEVE_MAX = IFLA_GENEVE_INNER_PROTO_INHERIT
 )
 
 const (