+ arpresolve(): remove an unused argument

+ struct ifnet: remove unused fields, move ipv6-related field close
  to each other, add a pointer to l3<->l2 translation tables (arp,nd6,
  etc.) for future use.

+ struct route: remove an unused field, move close to each
  other some fields that might likely go away in the future

sys/net/if_ethersubr.c

@@ -164,7 +164,7 @@ ether_output(struct ifnet *ifp, struct mbuf *m,
 	switch (dst->sa_family) {
 #ifdef INET
 	case AF_INET:
-		if (!arpresolve(ifp, rt, m, dst, edst, rt0))
+		if (!arpresolve(ifp, rt, m, dst, edst))
 			return (0);	/* if not yet resolved */
 		type = htons(ETHERTYPE_IP);
 		break;

sys/net/if_var.h

@@ -158,30 +158,23 @@ struct ifnet {
 		(struct ifnet *, struct mbuf *);
 	void	(*if_start)		/* initiate output routine */
 		(struct ifnet *);
-	int	(*if_done)		/* output complete routine */
-		(struct ifnet *);	/* (XXX not used; fake prototype) */
 	int	(*if_ioctl)		/* ioctl routine */
 		(struct ifnet *, u_long, caddr_t);
 	void	(*if_watchdog)		/* timer routine */
 		(struct ifnet *);
-	int	(*if_poll_recv)		/* polled receive routine */
-		(struct ifnet *, int *);
-	int	(*if_poll_xmit)		/* polled transmit routine */
-		(struct ifnet *, int *);
-	void	(*if_poll_intren)	/* polled interrupt reenable routine */
-		(struct ifnet *);
-	void	(*if_poll_slowinput)	/* input routine for slow devices */
-		(struct ifnet *, struct mbuf *);
 	void	(*if_init)		/* Init routine */
 		(void *);
 	int	(*if_resolvemulti)	/* validate/resolve multicast */
 		(struct ifnet *, struct sockaddr **, struct sockaddr *);
 	struct	ifqueue if_snd;		/* output queue */
-	struct	ifqueue *if_poll_slowq;	/* input queue for slow devices */
-	struct	ifprefixhead if_prefixhead; /* list of prefixes per if */
 	const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
+
+	struct	lltable *lltables;	/* list of L3-L2 resolution tables */
+
 	struct	label *if_label;	/* interface MAC label */
 
+	/* these are only used by IPv6 */
+	struct	ifprefixhead if_prefixhead; /* list of prefixes per if */
 	void	*if_afdata[AF_MAX];
 	int	if_afdata_initialized;
 	struct	mtx if_afdata_mtx;
@@ -478,13 +471,6 @@ int	ifioctl(struct socket *, u_long, caddr_t, struct thread *);
 int	ifpromisc(struct ifnet *, int);
 struct	ifnet *ifunit(const char *);
 
-int	if_poll_recv_slow(struct ifnet *ifp, int *quotap);
-void	if_poll_xmit_slow(struct ifnet *ifp, int *quotap);
-void	if_poll_throttle(void);
-void	if_poll_unthrottle(void *);
-void	if_poll_init(void);
-void	if_poll(void);
-
 struct	ifaddr *ifa_ifwithaddr(struct sockaddr *);
 struct	ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
 struct	ifaddr *ifa_ifwithnet(struct sockaddr *);

sys/net/route.h

@@ -107,17 +107,14 @@ struct rtentry {
 #define	rt_key(r)	((struct sockaddr *)((r)->rt_nodes->rn_key))
 #define	rt_mask(r)	((struct sockaddr *)((r)->rt_nodes->rn_mask))
 	struct	sockaddr *rt_gateway;	/* value */
-	long	rt_refcnt;		/* # held references */
 	u_long	rt_flags;		/* up/down?, host/net */
 	struct	ifnet *rt_ifp;		/* the answer: interface to use */
 	struct	ifaddr *rt_ifa;		/* the answer: interface address to use */
+	struct	rt_metrics_lite rt_rmx;	/* metrics used by rx'ing protocols */
+	long	rt_refcnt;		/* # held references */
 	struct	sockaddr *rt_genmask;	/* for generation of cloned routes */
 	caddr_t	rt_llinfo;		/* pointer to link level info cache */
-	struct	rt_metrics_lite rt_rmx;	/* metrics used by rx'ing protocols */
 	struct	rtentry *rt_gwroute;	/* implied entry for gatewayed routes */
-	int	(*rt_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
-		    struct rtentry *);
-					/* output routine for this (rt,if) */
 	struct	rtentry *rt_parent; 	/* cloning parent of this route */
 #ifdef _KERNEL
 	/* XXX ugly, user apps use this definition but don't have a mtx def */

sys/netinet/if_ether.c

@@ -347,13 +347,8 @@ arprequest(ifp, sip, tip, enaddr)
  * taken over here, either now or for later transmission.
  */
 int
-arpresolve(ifp, rt, m, dst, desten, rt0)
-	struct ifnet *ifp;
-	struct rtentry *rt;
-	struct mbuf *m;
-	struct sockaddr *dst;
-	u_char *desten;
-	struct rtentry *rt0;
+arpresolve(struct ifnet *ifp, struct rtentry *rt, struct mbuf *m,
+	struct sockaddr *dst, u_char *desten)
 {
 	struct llinfo_arp *la = 0;
 	struct sockaddr_dl *sdl;

sys/netinet/if_ether.h

@@ -113,8 +113,8 @@ struct sockaddr_inarp {
 extern u_char	ether_ipmulticast_min[ETHER_ADDR_LEN];
 extern u_char	ether_ipmulticast_max[ETHER_ADDR_LEN];
 
-int	arpresolve(struct ifnet *, struct rtentry *, struct mbuf *,
-	    struct sockaddr *, u_char *, struct rtentry *);
+int	arpresolve(struct ifnet *ifp, struct rtentry *rt,
+		struct mbuf *m, struct sockaddr *dst, u_char *desten);
 void	arp_ifinit(struct ifnet *, struct ifaddr *);
 #endif