PERFORCE change 163487 for review

[Marko Zec]

http://perforce.freebsd.org/chv.cgi?CH=163487

Change 163487 by zec at zec_amdx4 on 2009/06/04 14:03:58

	Allow for lo0 to be automatically destroyed via the vnet
	destructor framework.
	
	ifconfig lo0 destroy still works with unchanged semantics,
	i.e. returns an error and can never succeed.

Affected files ...

.. //depot/projects/vimage/src/sys/net/if_loop.c#50 edit

Differences ...

==== //depot/projects/vimage/src/sys/net/if_loop.c#50 (text+ko) ====

@@ -135,12 +135,11 @@
 static void
 lo_clone_destroy(struct ifnet *ifp)
 {
-#ifdef INVARIANTS
-	INIT_VNET_NET(ifp->if_vnet);
-#endif
 
+#ifndef VIMAGE
 	/* XXX: destroying lo0 will lead to panics. */
 	KASSERT(V_loif != ifp, ("%s: destroying lo0", __func__));
+#endif
 
 	bpfdetach(ifp);
 	if_detach(ifp);
@@ -194,8 +193,10 @@
 static int vnet_loif_idetach(unused)
 	const void *unused;
 {
+	INIT_VNET_NET(curvnet);
 
-	/* XXX nothing done here - revisit! */
+	if_clone_detach(V_lo_cloner);
+	V_loif = NULL;
 
 	return (0);
 }