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_pppvar.h b/sys/net/if_pppvar.h
index daa263c..f103df5 100644
--- a/sys/net/if_pppvar.h
+++ b/sys/net/if_pppvar.h
@@ -54,7 +54,7 @@
  * Structure describing each ppp unit.
  */
 struct ppp_softc {
-	struct	ifnet sc_if;		/* network-visible interface */
+	struct	ifnet *sc_ifp;		/* network-visible interface */
 /*hi*/	u_int	sc_flags;		/* control/status bits; see if_ppp.h */
 	struct	callout_handle sc_ch;	/* Used for scheduling timeouts */
 	void	*sc_devp;		/* pointer to device-dep structure */
@@ -99,6 +99,7 @@ struct ppp_softc {
 	int	sc_rawin_count;		/* # in sc_rawin */
 	LIST_ENTRY(ppp_softc) sc_list;
 };
+#define	PPP2IFP(sc)	((sc)->sc_ifp)
 
 struct	ppp_softc *pppalloc(pid_t pid);
 void	pppdealloc(struct ppp_softc *sc);