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authorJarek Poplawski <jarkao2@gmail.com>2008-10-31 10:46:19 +0300
committerDavid S. Miller <davem@davemloft.net>2008-10-31 10:46:19 +0300
commit03c05f0d4bb0c267edf12d614025a40e33c5a6f9 (patch)
treec23b79ed8b7dfcdabb872f5c114541ae2de8ac0f /net/sched/sch_tbf.c
parent8e3af97899db433111287e07d5105189f56fe191 (diff)
downloadlinux-03c05f0d4bb0c267edf12d614025a40e33c5a6f9.tar.xz
pkt_sched: Use qdisc->ops->peek() instead of ->dequeue() & ->requeue()
Use qdisc->ops->peek() instead of ->dequeue() & ->requeue() pair. After this patch the only remaining user of qdisc->ops->requeue() is netem_enqueue(). Based on ideas 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>
Diffstat (limited to 'net/sched/sch_tbf.c')
-rw-r--r--net/sched/sch_tbf.c12
1 files changed, 5 insertions, 7 deletions
diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index 94c61598b86a..61fdc77a48d2 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -169,7 +169,7 @@ static struct sk_buff *tbf_dequeue(struct Qdisc* sch)
struct tbf_sched_data *q = qdisc_priv(sch);
struct sk_buff *skb;
- skb = q->qdisc->dequeue(q->qdisc);
+ skb = q->qdisc->ops->peek(q->qdisc);
if (skb) {
psched_time_t now;
@@ -192,6 +192,10 @@ static struct sk_buff *tbf_dequeue(struct Qdisc* sch)
toks -= L2T(q, len);
if ((toks|ptoks) >= 0) {
+ skb = q->qdisc->dequeue(q->qdisc);
+ if (unlikely(!skb))
+ return NULL;
+
q->t_c = now;
q->tokens = toks;
q->ptokens = ptoks;
@@ -214,12 +218,6 @@ static struct sk_buff *tbf_dequeue(struct Qdisc* sch)
(cf. CSZ, HPFQ, HFSC)
*/
- if (q->qdisc->ops->requeue(skb, q->qdisc) != NET_XMIT_SUCCESS) {
- /* When requeue fails skb is dropped */
- qdisc_tree_decrease_qlen(q->qdisc, 1);
- sch->qstats.drops++;
- }
-
sch->qstats.overlimits++;
}
return NULL;