Save XDP attach mode into LinkXdp.

link.go

@@ -196,10 +196,11 @@ type LinkStatistics64 struct {
 }
 
 type LinkXdp struct {
-	Fd       int
-	Attached bool
-	Flags    uint32
-	ProgId   uint32
+	Fd         int
+	Attached   bool
+	AttachMode uint32
+	Flags      uint32
+	ProgId     uint32
 }
 
 // Device links cannot be created via netlink. These links

link_linux.go

@@ -2513,7 +2513,8 @@ func parseLinkXdp(data []byte) (*LinkXdp, error) {
 		case nl.IFLA_XDP_FD:
 			xdp.Fd = int(native.Uint32(attr.Value[0:4]))
 		case nl.IFLA_XDP_ATTACHED:
-			xdp.Attached = attr.Value[0] != 0
+			xdp.AttachMode = uint32(attr.Value[0])
+			xdp.Attached = xdp.AttachMode != 0
 		case nl.IFLA_XDP_FLAGS:
 			xdp.Flags = native.Uint32(attr.Value[0:4])
 		case nl.IFLA_XDP_PROG_ID:

nl/link_linux.go

@@ -478,6 +478,14 @@ const (
 	IFLA_XDP_MAX      = IFLA_XDP_PROG_ID
 )
 
+// XDP program attach mode (used as dump value for IFLA_XDP_ATTACHED)
+const (
+	XDP_ATTACHED_NONE = iota
+	XDP_ATTACHED_DRV
+	XDP_ATTACHED_SKB
+	XDP_ATTACHED_HW
+)
+
 const (
 	IFLA_IPTUN_UNSPEC = iota
 	IFLA_IPTUN_LINK