diff options
Diffstat (limited to 'include/net/sch_generic.h')
| -rw-r--r-- | include/net/sch_generic.h | 38 |
1 files changed, 28 insertions, 10 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index 3fe49d808957..f8c47429044a 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -53,7 +53,6 @@ struct Qdisc atomic_t refcnt; unsigned long state; struct sk_buff *gso_skb; - struct sk_buff_head requeue; struct sk_buff_head q; struct netdev_queue *dev_queue; struct Qdisc *next_sched; @@ -111,7 +110,7 @@ struct Qdisc_ops int (*enqueue)(struct sk_buff *, struct Qdisc *); struct sk_buff * (*dequeue)(struct Qdisc *); - int (*requeue)(struct sk_buff *, struct Qdisc *); + struct sk_buff * (*peek)(struct Qdisc *); unsigned int (*drop)(struct Qdisc *); int (*init)(struct Qdisc *, struct nlattr *arg); @@ -432,19 +431,38 @@ static inline struct sk_buff *qdisc_dequeue_tail(struct Qdisc *sch) return __qdisc_dequeue_tail(sch, &sch->q); } -static inline int __qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch, - struct sk_buff_head *list) +static inline struct sk_buff *qdisc_peek_head(struct Qdisc *sch) { - __skb_queue_head(list, skb); - sch->qstats.backlog += qdisc_pkt_len(skb); - sch->qstats.requeues++; + return skb_peek(&sch->q); +} - return NET_XMIT_SUCCESS; +/* generic pseudo peek method for non-work-conserving qdisc */ +static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch) +{ + /* we can reuse ->gso_skb because peek isn't called for root qdiscs */ + if (!sch->gso_skb) { + sch->gso_skb = sch->dequeue(sch); + if (sch->gso_skb) + /* it's still part of the queue */ + sch->q.qlen++; + } + + return sch->gso_skb; } -static inline int qdisc_requeue(struct sk_buff *skb, struct Qdisc *sch) +/* use instead of qdisc->dequeue() for all qdiscs queried with ->peek() */ +static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch) { - return __qdisc_requeue(skb, sch, &sch->q); + struct sk_buff *skb = sch->gso_skb; + + if (skb) { + sch->gso_skb = NULL; + sch->q.qlen--; + } else { + skb = sch->dequeue(sch); + } + + return skb; } static inline void __qdisc_reset_queue(struct Qdisc *sch, |