22 static int bfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch,  in bfifo_enqueue()  argument
25 	if (likely(sch->qstats.backlog + qdisc_pkt_len(skb) <= sch->limit))  in bfifo_enqueue()
26 		return qdisc_enqueue_tail(skb, sch);  in bfifo_enqueue()
28 	return qdisc_drop(skb, sch, to_free);  in bfifo_enqueue()
31 static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch,  in pfifo_enqueue()  argument
34 	if (likely(sch->q.qlen < sch->limit))  in pfifo_enqueue()
35 		return qdisc_enqueue_tail(skb, sch);  in pfifo_enqueue()
37 	return qdisc_drop(skb, sch, to_free);  in pfifo_enqueue()
40 static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch,  in pfifo_tail_enqueue()  argument
45 	if (likely(sch->q.qlen < sch->limit))  in pfifo_tail_enqueue()
46 		return qdisc_enqueue_tail(skb, sch);  in pfifo_tail_enqueue()
48 	prev_backlog = sch->qstats.backlog;  in pfifo_tail_enqueue()
50 	__qdisc_queue_drop_head(sch, &sch->q, to_free);  in pfifo_tail_enqueue()
51 	qdisc_qstats_drop(sch);  in pfifo_tail_enqueue()
52 	qdisc_enqueue_tail(skb, sch);  in pfifo_tail_enqueue()
54 	qdisc_tree_reduce_backlog(sch, 0, prev_backlog - sch->qstats.backlog);  in pfifo_tail_enqueue()
58 static int fifo_init(struct Qdisc *sch, struct nlattr *opt,  in fifo_init()  argument
62 	bool is_bfifo = sch->ops == &bfifo_qdisc_ops;  in fifo_init()
65 		u32 limit = qdisc_dev(sch)->tx_queue_len;  in fifo_init()
68 			limit *= psched_mtu(qdisc_dev(sch));  in fifo_init()
70 		sch->limit = limit;  in fifo_init()
77 		sch->limit = ctl->limit;  in fifo_init()
81 		bypass = sch->limit >= psched_mtu(qdisc_dev(sch));  in fifo_init()
83 		bypass = sch->limit >= 1;  in fifo_init()
86 		sch->flags |= TCQ_F_CAN_BYPASS;  in fifo_init()
88 		sch->flags &= ~TCQ_F_CAN_BYPASS;  in fifo_init()
92 static int fifo_dump(struct Qdisc *sch, struct sk_buff *skb)  in fifo_dump()  argument
94 	struct tc_fifo_qopt opt = { .limit = sch->limit };  in fifo_dump()
168 struct Qdisc *fifo_create_dflt(struct Qdisc *sch, struct Qdisc_ops *ops,  in fifo_create_dflt()  argument
175 	q = qdisc_create_dflt(sch->dev_queue, ops, TC_H_MAKE(sch->handle, 1),  in fifo_create_dflt()