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[PKT_SCHED]: Qdisc drop operation is optional

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The drop operation is optional and qdiscs must check if childs support it.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-03-20 19:00:49 -08:00 • committed by David S. Miller
parent a85d771e32
commit 6d037a26f0
3 changed files with 5 additions and 5 deletions
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4
net/sched/sch_netem.c
View file

@ -252,9 +252,9 @@ static int netem_requeue(struct sk_buff *skb, struct Qdisc *sch)
static unsigned int netem_drop(struct Qdisc* sch) static unsigned int netem_drop(struct Qdisc* sch)
{ {
struct netem_sched_data *q = qdisc_priv(sch); struct netem_sched_data *q = qdisc_priv(sch);
unsigned int len; unsigned int len = 0;
if ((len = q->qdisc->ops->drop(q->qdisc)) != 0) { if (q->qdisc->ops->drop && (len = q->qdisc->ops->drop(q->qdisc)) != 0) {
sch->q.qlen--; sch->q.qlen--;
sch->qstats.drops++; sch->qstats.drops++;
} }

2
net/sched/sch_prio.c
View file

@ -165,7 +165,7 @@ static unsigned int prio_drop(struct Qdisc* sch)
for (prio = q->bands-1; prio >= 0; prio--) { for (prio = q->bands-1; prio >= 0; prio--) {
qdisc = q->queues[prio]; qdisc = q->queues[prio];
if ((len = qdisc->ops->drop(qdisc)) != 0) { if (qdisc->ops->drop && (len = qdisc->ops->drop(qdisc)) != 0) {
sch->q.qlen--; sch->q.qlen--;
return len; return len;
} }

4
net/sched/sch_tbf.c
View file

@ -177,9 +177,9 @@ static int tbf_requeue(struct sk_buff *skb, struct Qdisc* sch)
static unsigned int tbf_drop(struct Qdisc* sch) static unsigned int tbf_drop(struct Qdisc* sch)
{ {
struct tbf_sched_data *q = qdisc_priv(sch); struct tbf_sched_data *q = qdisc_priv(sch);
unsigned int len; unsigned int len = 0;
if ((len = q->qdisc->ops->drop(q->qdisc)) != 0) { if (q->qdisc->ops->drop && (len = q->qdisc->ops->drop(q->qdisc)) != 0) {
sch->q.qlen--; sch->q.qlen--;
sch->qstats.drops++; sch->qstats.drops++;
} }