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authorPatrick McHardy <kaber@trash.net>2008-10-31 00:44:18 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-31 00:44:18 -0700
commit48a8f519e0fe22a5c98523286b2a120841a11dd5 (patch)
treeec70428b026091669bf1e23779f9cfdd1a1ca46f /net/sched/sch_fifo.c
parent90d841fd0a5e02affd4e2bbdde4f710c61599281 (diff)
downloadlinux-48a8f519e0fe22a5c98523286b2a120841a11dd5.tar.bz2
pkt_sched: Add ->peek() methods for fifo, prio and SFQ qdiscs.
From: Patrick McHardy <kaber@trash.net> Just as a demonstration how easy adding a peek operation to the work-conserving qdiscs actually is. It doesn't need to keep or change any internal state in many cases thanks to the guarantee that the packet will either be dequeued or, if another packet arrives, the upper qdisc will immediately ->peek again to reevaluate the state. (This is only slightly modified Patrick's patch.) Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_fifo.c')
-rw-r--r--net/sched/sch_fifo.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sched/sch_fifo.c b/net/sched/sch_fifo.c
index 23d258bfe8ac..8825e8806f41 100644
--- a/net/sched/sch_fifo.c
+++ b/net/sched/sch_fifo.c
@@ -83,6 +83,7 @@ struct Qdisc_ops pfifo_qdisc_ops __read_mostly = {
.priv_size = sizeof(struct fifo_sched_data),
.enqueue = pfifo_enqueue,
.dequeue = qdisc_dequeue_head,
+ .peek = qdisc_peek_head,
.requeue = qdisc_requeue,
.drop = qdisc_queue_drop,
.init = fifo_init,
@@ -98,6 +99,7 @@ struct Qdisc_ops bfifo_qdisc_ops __read_mostly = {
.priv_size = sizeof(struct fifo_sched_data),
.enqueue = bfifo_enqueue,
.dequeue = qdisc_dequeue_head,
+ .peek = qdisc_peek_head,
.requeue = qdisc_requeue,
.drop = qdisc_queue_drop,
.init = fifo_init,