int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *,
int *key_lenp);
void ovs_flow_used(struct sw_flow *, struct sk_buff *);
int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *,
int *key_lenp);
void ovs_flow_used(struct sw_flow *, struct sk_buff *);