This main goals of this project are:

1. separating L2 tables (ARP, NDP) from the L3 routing tables
2. removing as much locking dependencies among these layers as
   possible to allow for some parallelism in the search operations
3. simplify the logic in the routing code,

The most notable end result is the obsolescent of the route
cloning (RTF_CLONING) concept, which translated into code reduction
in both IPv4 ARP and IPv6 NDP related modules, and size reduction in
struct rtentry{}. The change in design obsoletes the semantics of
RTF_CLONING, RTF_WASCLONE and RTF_LLINFO routing flags. The userland
applications such as "arp" and "ndp" have been modified to reflect
those changes. The output from "netstat -r" shows only the routing
entries.

Quite a few developers have contributed to this project in the
past: Glebius Smirnoff, Luigi Rizzo, Alessandro Cerri, and
Andre Oppermann. And most recently:

- Kip Macy revised the locking code completely, thus completing
  the last piece of the puzzle, Kip has also been conducting
  active functional testing
- Sam Leffler has helped me improving/refactoring the code, and
  provided valuable reviews
- Julian Elischer setup the perforce tree for me and has helped
  me maintaining that branch before the svn conversion

1 files changed, 4 insertions, 2 deletions

diff --git a/sys/net/if_var.h b/sys/net/if_var.h
index 62c2b99..c4cb4f6 100644
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -169,8 +169,6 @@ struct ifnet {
 
 	void	*if_bridge;		/* bridge glue */
 
-	struct	lltable *lltables;	/* list of L3-L2 resolution tables */
-
 	struct	label *if_label;	/* interface MAC label */
 
 	/* these are only used by IPv6 */
@@ -181,6 +179,7 @@ struct ifnet {
 	struct	task if_starttask;	/* task for IFF_NEEDSGIANT */
 	struct	task if_linktask;	/* task for link change events */
 	struct	mtx if_addr_mtx;	/* mutex to protect address lists */
+
 	LIST_ENTRY(ifnet) if_clones;	/* interfaces of a cloner */
 	TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
 					/* protected by if_addr_mtx */
@@ -365,6 +364,9 @@ EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
 #define	IF_AFDATA_UNLOCK(ifp)	mtx_unlock(&(ifp)->if_afdata_mtx)
 #define	IF_AFDATA_DESTROY(ifp)	mtx_destroy(&(ifp)->if_afdata_mtx)
 
+#define	IF_AFDATA_LOCK_ASSERT(ifp)	mtx_assert(&(ifp)->if_afdata_mtx, MA_OWNED)
+#define	IF_AFDATA_UNLOCK_ASSERT(ifp)	mtx_assert(&(ifp)->if_afdata_mtx, MA_NOTOWNED)
+
 #define	IFF_LOCKGIANT(ifp) do {						\
 	if ((ifp)->if_flags & IFF_NEEDSGIANT)				\
 		mtx_lock(&Giant);					\