Stop embedding struct ifnet at the top of driver softcs. Instead the

struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
 - Struct arpcom is no longer referenced in normal interface code.
   Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
   To enforce this ac_enaddr has been renamed to _ac_enaddr.
 - The second argument to ether_ifattach is now always the mac address
   from driver private storage rather than sometimes being ac_enaddr.

Reviewed by:	sobomax, sam

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/net/if_gif.h b/sys/net/if_gif.h
index dc92ae1..831c7f7 100644
--- a/sys/net/if_gif.h
+++ b/sys/net/if_gif.h
@@ -56,7 +56,7 @@ extern	void (*ng_gif_attach_p)(struct ifnet *ifp);
 extern	void (*ng_gif_detach_p)(struct ifnet *ifp);
 
 struct gif_softc {
-	struct ifnet	gif_if;	   /* common area - must be at the top */
+	struct ifnet	*gif_ifp;
 	struct sockaddr	*gif_psrc; /* Physical src addr */
 	struct sockaddr	*gif_pdst; /* Physical dst addr */
 	union {
@@ -71,6 +71,7 @@ struct gif_softc {
 	void		*gif_netgraph;	/* ng_gif(4) netgraph node info */
 	LIST_ENTRY(gif_softc) gif_list; /* all gif's are linked */
 };
+#define	GIF2IFP(sc)	((sc)->gif_ifp)
 
 #define gif_ro gifsc_gifscr.gifscr_ro
 #ifdef INET6