Add spares to struct ifnet and socket for packet pacing and/or general

use.  Update comments regarding the spare fields in struct inpcb.

Bump __FreeBSD_version for the changes to the size of the structures.

Reviewed by:	gnn@
Approved by:	re@ (gjb@)
Sponsored by:	Chelsio Communications

sys/net/if_var.h

@@ -311,6 +311,8 @@ struct ifnet {
 	 * that structure can be enhanced without changing the kernel
 	 * binary interface.
 	 */
+	void	*if_pspare[4];		/* packet pacing / general use */
+	int	if_ispare[4];		/* packet pacing / general use */
 };
 
 /* for compatibility with other BSDs */

sys/netinet/in_pcb.h

@@ -202,10 +202,10 @@ struct inpcb {
 	u_char	inp_ip_minttl;		/* (i) minimum TTL or drop */
 	uint32_t inp_flowid;		/* (x) flow id / queue id */
 	u_int	inp_refcount;		/* (i) refcount */
-	void	*inp_pspare[5];		/* (x) route caching / general use */
+	void	*inp_pspare[5];		/* (x) packet pacing / general use */
 	uint32_t inp_flowtype;		/* (x) M_HASHTYPE value */
 	uint32_t inp_rss_listen_bucket;	/* (x) overridden RSS listen bucket */
-	u_int	inp_ispare[4];		/* (x) route caching / user cookie /
+	u_int	inp_ispare[4];		/* (x) packet pacing / user cookie /
 					 *     general use */
 
 	/* Local and foreign ports, local and foreign addr. */

sys/sys/param.h

@@ -58,7 +58,7 @@
  *		in the range 5 to 9.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1100119	/* Master, propagated to newvers */
+#define __FreeBSD_version 1100120	/* Master, propagated to newvers */
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,

sys/sys/socketvar.h

@@ -126,6 +126,9 @@ struct socket {
 	 */
 	int so_fibnum;		/* routing domain for this socket */
 	uint32_t so_user_cookie;
+
+	void *so_pspare[2];	/* packet pacing / general use */
+	int so_ispare[2];	/* packet pacing / general use */
 };
 
 /*