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| author | Jarek Poplawski <jarkao2@gmail.com> | 2008-10-31 00:47:01 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-10-31 00:47:01 -0700 |
| commit | 77be155cba4e163e8bba9fd27222a8b6189ec4f7 (patch) | |
| tree | 0819d4c0bb760080aaba8a00060a774205914034 /net/sched/sch_netem.c | |
| parent | 03c05f0d4bb0c267edf12d614025a40e33c5a6f9 (diff) | |
| download | talos-obmc-linux-77be155cba4e163e8bba9fd27222a8b6189ec4f7.tar.gz talos-obmc-linux-77be155cba4e163e8bba9fd27222a8b6189ec4f7.zip | |
pkt_sched: Add peek emulation for non-work-conserving qdiscs.
This patch adds qdisc_peek_dequeued() wrapper to emulate peek method
with qdisc->dequeue() and storing "peeked" skb in qdisc->gso_skb until
dequeuing. This is mainly for compatibility reasons not to break some
strange configs because peeking is expected for non-work-conserving
parent qdiscs to query work-conserving child qdiscs.
This implementation requires using qdisc_dequeue_peeked() wrapper
instead of directly calling qdisc->dequeue() for all qdiscs ever
querried with qdisc->ops->peek() or qdisc_peek_dequeued().
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_netem.c')
| -rw-r--r-- | net/sched/sch_netem.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c index 74fbdb52baed..3080bd6ee332 100644 --- a/net/sched/sch_netem.c +++ b/net/sched/sch_netem.c @@ -290,8 +290,8 @@ static struct sk_buff *netem_dequeue(struct Qdisc *sch) /* if more time remaining? */ if (cb->time_to_send <= now) { - skb = q->qdisc->dequeue(q->qdisc); - if (!skb) + skb = qdisc_dequeue_peeked(q->qdisc); + if (unlikely(!skb)) return NULL; pr_debug("netem_dequeue: return skb=%p\n", skb); @@ -714,6 +714,7 @@ static struct Qdisc_ops netem_qdisc_ops __read_mostly = { .priv_size = sizeof(struct netem_sched_data), .enqueue = netem_enqueue, .dequeue = netem_dequeue, + .peek = qdisc_peek_dequeued, .requeue = netem_requeue, .drop = netem_drop, .init = netem_init, |
