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_slvar.h b/sys/net/if_slvar.h
index 2de9533..e6b6d2c 100644
--- a/sys/net/if_slvar.h
+++ b/sys/net/if_slvar.h
@@ -43,7 +43,7 @@
  *  of sl_softc.)
  */
 struct sl_softc {
-	struct	ifnet sc_if;		/* network-visible interface */
+	struct	ifnet *sc_ifp;		/* network-visible interface */
 	struct	ifqueue sc_fastq;	/* interactive output queue */
 	struct	tty *sc_ttyp;		/* pointer to tty structure */
 	struct	mbuf *sc_mbuf;		/* pointer to mbuf containing buffer */
@@ -67,6 +67,7 @@ struct sl_softc {
 	LIST_ENTRY(sl_softc) sl_next;
 	u_char	*bpfbuf;		/* hang buffer for bpf here */
 };
+#define	SL2IFP(sc)	((sc)->sc_ifp)
 
 /* internal flags */
 #define	SC_ERROR	0x0001		/* had an input error */