veth: move loopback logic to common location

The veth driver contains code to forward an skb
from the start_xmit function of one network
device into the receive path of another device.

Moving that code into a common location lets us
reuse the code for direct forwarding of data
between macvlan ports, and possibly in other
drivers.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 97873e31661c..9428793775a0 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1562,6 +1562,8 @@ extern int		dev_set_mac_address(struct net_device *,
 extern int              dev_hard_start_xmit(struct sk_buff *skb,
                                             struct net_device *dev,
                                             struct netdev_queue *txq);
+extern int              dev_forward_skb(struct net_device *dev,
+                                        struct sk_buff *skb);
 
 extern int              netdev_budget;