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_gre.h b/sys/net/if_gre.h
index ef9fa4e..6c8e853 100644
--- a/sys/net/if_gre.h
+++ b/sys/net/if_gre.h
@@ -55,7 +55,7 @@ typedef enum {
 } wccp_ver_t;
 
 struct gre_softc {
-	struct ifnet sc_if;
+	struct ifnet *sc_ifp;
 	LIST_ENTRY(gre_softc) sc_list;
 	int gre_unit;
 	int gre_flags;
@@ -71,6 +71,7 @@ struct gre_softc {
 
 	wccp_ver_t wccp_ver;	/* version of the WCCP */
 };
+#define	GRE2IFP(sc)	((sc)->sc_ifp)
 
 
 struct gre_h {