pkt_sched: sch_generic: Add Qdisc_ops peek() method.

Add Qdisc_ops peek() method in order to replace requeuing.

Based on ideas and patches of Herbert Xu, Patrick McHardy and
David S. Miller.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 3fe49d8..f81f7c4 100644 (file)
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -111,6 +111,7 @@ struct Qdisc_ops
 
        int                     (*enqueue)(struct sk_buff *, struct Qdisc *);
        struct sk_buff *        (*dequeue)(struct Qdisc *);
+       struct sk_buff *        (*peek)(struct Qdisc *);
        int                     (*requeue)(struct sk_buff *, struct Qdisc *);
        unsigned int            (*drop)(struct Qdisc *);