netdev: Add netdev->select_queue() method.
Devices or device layers can set this to control the queue selection
performed by dev_pick_tx().
This function runs under RCU protection, which allows overriding
functions to have some way of synchronizing with things like dynamic
->real_num_tx_queues adjustments.
This makes the spinlock prefetch in dev_queue_xmit() a little bit
less effective, but that's the price right now for correctness.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index fdac115..9464e64 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -724,6 +724,9 @@
void (*poll_controller)(struct net_device *dev);
#endif
+ u16 (*select_queue)(struct net_device *dev,
+ struct sk_buff *skb);
+
#ifdef CONFIG_NET_NS
/* Network namespace this network device is inside */
struct net *nd_net;
