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authorJarek Poplawski <jarkao2@gmail.com>2008-10-31 00:45:27 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-31 00:45:27 -0700
commit99c0db26797edb39cf83c8c5f8972067f5426b4e (patch)
tree918b933d2ac5f0579b24636274c4394c17011d0d /net/sched/sch_api.c
parent48a8f519e0fe22a5c98523286b2a120841a11dd5 (diff)
pkt_sched: sch_generic: Add generic qdisc->ops->peek() implementation.
With feedback from Patrick McHardy. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_api.c')
-rw-r--r--net/sched/sch_api.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index b16ad2972c6b..e5646614e88d 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -102,6 +102,10 @@ static int tclass_notify(struct sk_buff *oskb, struct nlmsghdr *n,
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 @@ int register_qdisc(struct Qdisc_ops *qops)
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;