Add padding for anticipated functionality

- vimage
 - TOE
 - multiq
 - host rtentry caching

Rename spare used by 80211 to if_llsoftc

Reviewed by: rwatson, gnn
MFC after: 1 day

sys/net/if_var.h

@@ -161,8 +161,7 @@ struct ifnet {
 	int	(*if_resolvemulti)	/* validate/resolve multicast */
 		(struct ifnet *, struct sockaddr **, struct sockaddr *);
 	struct	ifaddr	*if_addr;	/* pointer to link-level address */
-	void	*if_spare2;		/* spare pointer 2 */
-	void	*if_spare3;		/* spare pointer 3 */
+	void	*if_llsoftc;		/* link layer softc */
 	int	if_drv_flags;		/* driver-managed status flags */
 	u_int	if_spare_flags2;	/* spare flags 2 */
 	struct  ifaltq if_snd;		/* output queue (includes altq) */
@@ -187,6 +186,8 @@ struct ifnet {
 					/* protected by if_addr_mtx */
 	void	*if_pf_kif;
 	void	*if_lagg;		/* lagg glue */
+	void	*if_pspare[10];		/* multiq/TOE 3; vimage 3; general use 4 */
+	int	if_ispare[2];		/* general use 2 */
 };
 
 typedef void if_init_f_t(void *);

sys/net80211/ieee80211.c

@@ -275,8 +275,8 @@ ieee80211_ifattach(struct ieee80211com *ic)
 	if (ic->ic_reset == NULL)
 		ic->ic_reset = ieee80211_default_reset;
 
-	KASSERT(ifp->if_spare2 == NULL, ("oops, hosed"));
-	ifp->if_spare2 = ic;			/* XXX temp backpointer */
+	KASSERT(ifp->if_llsoftc == NULL, ("oops, hosed"));
+	ifp->if_llsoftc = ic;
 }
 
 void

sys/net80211/ieee80211_output.c

@@ -248,7 +248,7 @@ ieee80211_output(struct ifnet *ifp, struct mbuf *m,
 	struct sockaddr *dst, struct rtentry *rt0)
 {
 #define senderr(e) do { error = (e); goto bad;} while (0)
-	struct ieee80211com *ic = ifp->if_spare2;	/* XXX */
+	struct ieee80211com *ic = ifp->if_llsoftc;	/* XXX */
 	struct ieee80211_node *ni = NULL;
 	struct ieee80211_frame *wh;
 	int error;

sys/netinet/in_pcb.h

@@ -113,19 +113,13 @@ struct	icmp6_filter;
 struct inpcb {
 	LIST_ENTRY(inpcb) inp_hash;	/* hash list */
 	LIST_ENTRY(inpcb) inp_list;	/* list for all PCBs of this proto */
-	u_int32_t	inp_flow;
-
-	/* Local and foreign ports, local and foreign addr. */
-	struct	in_conninfo inp_inc;
-
 	void	*inp_ppcb;		/* pointer to per-protocol pcb */
 	struct	inpcbinfo *inp_pcbinfo;	/* PCB list info */
 	struct	socket *inp_socket;	/* back pointer to socket */
-					/* list for this PCB's local port */
-	struct	label *inp_label;	/* MAC label */
+
+	u_int32_t	inp_flow;
 	int	inp_flags;		/* generic IP/datagram flags */
 
-	struct	inpcbpolicy *inp_sp;    /* for IPSEC */
 	u_char	inp_vflag;		/* IP version flag (v4/v6) */
 #define	INP_IPV4	0x1
 #define	INP_IPV6	0x2
@@ -137,6 +131,15 @@ struct inpcb {
 	u_char	inp_ip_ttl;		/* time to live proto */
 	u_char	inp_ip_p;		/* protocol proto */
 	u_char	inp_ip_minttl;		/* minimum TTL or drop */
+	uint32_t inp_ispare1;		/* connection id / queue id */
+	void	*inp_pspare[2];		/* rtentry / general use */
+
+	/* Local and foreign ports, local and foreign addr. */
+	struct	in_conninfo inp_inc;
+
+					/* list for this PCB's local port */
+	struct	label *inp_label;	/* MAC label */
+	struct	inpcbpolicy *inp_sp;    /* for IPSEC */
 
 	/* Protocol-dependent part; options. */
 	struct {
@@ -262,6 +265,12 @@ struct inpcbinfo {
 	 */
 	u_quad_t		 ipi_gencnt;
 	struct mtx		 ipi_mtx;
+
+	/*
+	 * vimage 1
+	 * general use 1
+	 */
+	void 			*ipi_pspare[2];	
 };
 
 #define INP_LOCK_INIT(inp, d, t) \

sys/netinet/tcp_syncache.c

@@ -135,6 +135,9 @@ struct syncache {
 #define SCF_UNREACH	0x10			/* icmp unreachable received */
 #define SCF_SIGNATURE	0x20			/* send MD5 digests */
 #define SCF_SACK	0x80			/* send SACK option */
+#ifndef DISABLE_TCP_OFFLOAD
+	void		*sc_pspare[2];		/* toepcb / toe_usrreqs */
+#endif			
 #ifdef MAC
 	struct label	*sc_label;		/* MAC label reference */
 #endif

sys/netinet/tcp_var.h

@@ -206,6 +206,7 @@ struct tcpcb {
 	int	t_rttlow;		/* smallest observerved RTT */
 	u_int32_t	rfbuf_ts;	/* recv buffer autoscaling timestamp */
 	int	rfbuf_cnt;		/* recv buffer autoscaling byte count */
+	void	*t_pspare[5];		/* toe usrreqs / toepcb * / congestion algo / vimage / 1 general use */ 
 };
 
 #define IN_FASTRECOVERY(tp)	(tp->t_flags & TF_FASTRECOVERY)

sys/sys/ucred.h

@@ -55,6 +55,7 @@ struct ucred {
 	struct uidinfo	*cr_uidinfo;	/* per euid resource consumption */
 	struct uidinfo	*cr_ruidinfo;	/* per ruid resource consumption */
 	struct prison	*cr_prison;	/* jail(2) */
+	void 		*cr_pspare[3];	/* vimage 2; general use 1 */
 #define	cr_endcopy	cr_label
 	struct label	*cr_label;	/* MAC label */
 	struct auditinfo_addr	cr_audit;	/* Audit properties. */