Step 1.5 of importing the network stack virtualization infrastructure

from the vimage project, as per plan established at devsummit 08/08:
http://wiki.freebsd.org/Image/Notes200808DevSummit

Introduce INIT_VNET_*() initializer macros, VNET_FOREACH() iterator
macros, and CURVNET_SET() context setting macros, all currently
resolving to NOPs.

Prepare for virtualization of selected SYSCTL objects by introducing a
family of SYSCTL_V_*() macros, currently resolving to their global
counterparts, i.e. SYSCTL_V_INT() == SYSCTL_INT().

Move selected #defines from sys/sys/vimage.h to newly introduced header
files specific to virtualized subsystems (sys/net/vnet.h,
sys/netinet/vinet.h etc.).

All the changes are verified to have zero functional impact at this
point in time by doing MD5 comparision between pre- and post-change
object files(*).

(*) netipsec/keysock.c did not validate depending on compile time options.

Implemented by:	julian, bz, brooks, zec
Reviewed by:	julian, bz, brooks, kris, rwatson, ...
Approved by:	julian (mentor)
Obtained from:	//depot/projects/vimage-commit2/...
X-MFC after:	never
Sponsored by:	NLnet Foundation, The FreeBSD Foundation

1 files changed, 3 insertions, 0 deletions

diff --git a/sys/net/if_gre.c b/sys/net/if_gre.c
index c3ec001..6b5e739 100644
--- a/sys/net/if_gre.c
+++ b/sys/net/if_gre.c
@@ -241,6 +241,9 @@ static int
 gre_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 	   struct rtentry *rt)
 {
+#ifdef INET6
+	INIT_VNET_INET(ifp->if_vnet);
+#endif
 	int error = 0;
 	struct gre_softc *sc = ifp->if_softc;
 	struct greip *gh;