Add flowid to mbuf to allow drivers to uniquely

identify connection flows to guarantee ordering
across queues

sys/sys/mbuf.h

@@ -115,6 +115,9 @@ struct pkthdr {
 	/* variables for ip and tcp reassembly */
 	void		*header;	/* pointer to packet header */
 	int		 len;		/* total packet length */
+	uint32_t	 flowid;	/* packet's 4-tuple system 
+					 * flow identifier
+					 */
 	/* variables for hardware checksum */
 	int		 csum_flags;	/* flags regarding checksum */
 	int		 csum_data;	/* data field used by csum routines */