2 * Copyright 2005, Devicescape Software, Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * If building without CONFIG_NET_SCHED we need a simple
9 * fifo qdisc to install by default as the sub-qdisc.
10 * This is a simple replacement for sch_fifo.
13 #include <linux/config.h>
14 #include <linux/version.h>
15 #include <linux/netdevice.h>
16 #include <net/ieee80211.h>
17 #include "ieee80211_i.h"
20 static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc* qd)
22 struct sk_buff_head *q = qdisc_priv(qd);
24 if (skb_queue_len(q) > qd->dev->tx_queue_len) {
30 skb_queue_tail(q, skb);
32 qd->bstats.bytes += skb->len;
35 return NET_XMIT_SUCCESS;
39 static int pfifo_requeue(struct sk_buff *skb, struct Qdisc* qd)
41 struct sk_buff_head *q = qdisc_priv(qd);
43 skb_queue_head(q, skb);
45 qd->bstats.bytes += skb->len;
48 return NET_XMIT_SUCCESS;
52 static struct sk_buff *pfifo_dequeue(struct Qdisc* qd)
54 struct sk_buff_head *q = qdisc_priv(qd);
56 return skb_dequeue(q);
60 static int pfifo_init(struct Qdisc* qd, struct rtattr *opt)
62 struct sk_buff_head *q = qdisc_priv(qd);
64 skb_queue_head_init(q);
69 static void pfifo_reset(struct Qdisc* qd)
71 struct sk_buff_head *q = qdisc_priv(qd);
78 static int pfifo_dump(struct Qdisc *qd, struct sk_buff *skb)
84 struct Qdisc_ops pfifo_qdisc_ops =
88 .id = "ieee80211_pfifo",
89 .priv_size = sizeof(struct sk_buff_head),
91 .enqueue = pfifo_enqueue,
92 .dequeue = pfifo_dequeue,
93 .requeue = pfifo_requeue,