pkt_sched: sch_generic: Add generic qdisc->ops->peek() implementation.
With feedback from Patrick McHardy.
Signed-off-by: Jarek Poplawski <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index b16ad29..e5646614 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -102,6 +102,10 @@
requeues once dequeued packet. It is used for non-standard or
just buggy devices, which can defer output even if netif_queue_stopped()=0.
+ ---peek
+
+ like dequeue but without removing a packet from the queue
+
---reset
returns qdisc to initial state: purge all buffers, clear all
@@ -149,6 +153,14 @@
qops->enqueue = noop_qdisc_ops.enqueue;
if (qops->requeue == NULL)
qops->requeue = noop_qdisc_ops.requeue;
+ if (qops->peek == NULL) {
+ if (qops->dequeue == NULL) {
+ qops->peek = noop_qdisc_ops.peek;
+ } else {
+ rc = -EINVAL;
+ goto out;
+ }
+ }
if (qops->dequeue == NULL)
qops->dequeue = noop_qdisc_ops.dequeue;
