/* 1 band FIFO pseudo-"scheduler" */
-struct fifo_sched_data
+static int bfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
- u32 limit;
-};
-
-static int bfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
-{
- struct fifo_sched_data *q = qdisc_priv(sch);
-
- if (likely(sch->qstats.backlog + qdisc_pkt_len(skb) <= q->limit))
+ if (likely(sch->qstats.backlog + qdisc_pkt_len(skb) <= sch->limit))
return qdisc_enqueue_tail(skb, sch);
return qdisc_reshape_fail(skb, sch);
}
-static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
+static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
- struct fifo_sched_data *q = qdisc_priv(sch);
-
- if (likely(skb_queue_len(&sch->q) < q->limit))
+ if (likely(skb_queue_len(&sch->q) < sch->limit))
return qdisc_enqueue_tail(skb, sch);
return qdisc_reshape_fail(skb, sch);
}
-static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc* sch)
+static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
- struct fifo_sched_data *q = qdisc_priv(sch);
-
- if (likely(skb_queue_len(&sch->q) < q->limit))
+ if (likely(skb_queue_len(&sch->q) < sch->limit))
return qdisc_enqueue_tail(skb, sch);
/* queue full, remove one skb to fulfill the limit */
static int fifo_init(struct Qdisc *sch, struct nlattr *opt)
{
- struct fifo_sched_data *q = qdisc_priv(sch);
+ bool bypass;
+ bool is_bfifo = sch->ops == &bfifo_qdisc_ops;
if (opt == NULL) {
u32 limit = qdisc_dev(sch)->tx_queue_len ? : 1;
- if (sch->ops == &bfifo_qdisc_ops)
+ if (is_bfifo)
limit *= psched_mtu(qdisc_dev(sch));
- q->limit = limit;
+ sch->limit = limit;
} else {
struct tc_fifo_qopt *ctl = nla_data(opt);
if (nla_len(opt) < sizeof(*ctl))
return -EINVAL;
- q->limit = ctl->limit;
+ sch->limit = ctl->limit;
}
+ if (is_bfifo)
+ bypass = sch->limit >= psched_mtu(qdisc_dev(sch));
+ else
+ bypass = sch->limit >= 1;
+
+ if (bypass)
+ sch->flags |= TCQ_F_CAN_BYPASS;
+ else
+ sch->flags &= ~TCQ_F_CAN_BYPASS;
return 0;
}
static int fifo_dump(struct Qdisc *sch, struct sk_buff *skb)
{
- struct fifo_sched_data *q = qdisc_priv(sch);
- struct tc_fifo_qopt opt = { .limit = q->limit };
+ struct tc_fifo_qopt opt = { .limit = sch->limit };
NLA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt);
return skb->len;
struct Qdisc_ops pfifo_qdisc_ops __read_mostly = {
.id = "pfifo",
- .priv_size = sizeof(struct fifo_sched_data),
+ .priv_size = 0,
.enqueue = pfifo_enqueue,
.dequeue = qdisc_dequeue_head,
.peek = qdisc_peek_head,
struct Qdisc_ops bfifo_qdisc_ops __read_mostly = {
.id = "bfifo",
- .priv_size = sizeof(struct fifo_sched_data),
+ .priv_size = 0,
.enqueue = bfifo_enqueue,
.dequeue = qdisc_dequeue_head,
.peek = qdisc_peek_head,
struct Qdisc_ops pfifo_head_drop_qdisc_ops __read_mostly = {
.id = "pfifo_head_drop",
- .priv_size = sizeof(struct fifo_sched_data),
+ .priv_size = 0,
.enqueue = pfifo_tail_enqueue,
.dequeue = qdisc_dequeue_head,
.peek = qdisc_peek_head,