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/*
* Copyright 2005, Devicescape Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* If building without CONFIG_NET_SCHED we need a simple
* fifo qdisc to install by default as the sub-qdisc.
* This is a simple replacement for sch_fifo.
*/
#include <linux/skbuff.h>
#include <net/pkt_sched.h>
#include <net/d80211.h>
#include "ieee80211_i.h"
#include "wme.h"
static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc* qd)
{
struct sk_buff_head *q = qdisc_priv(qd);
if (skb_queue_len(q) > qd->dev->tx_queue_len) {
qd->qstats.drops++;
kfree_skb(skb);
return NET_XMIT_DROP;
}
skb_queue_tail(q, skb);
qd->q.qlen++;
qd->bstats.bytes += skb->len;
qd->bstats.packets++;
return NET_XMIT_SUCCESS;
}
static int pfifo_requeue(struct sk_buff *skb, struct Qdisc* qd)
{
struct sk_buff_head *q = qdisc_priv(qd);
skb_queue_head(q, skb);
qd->q.qlen++;
qd->bstats.bytes += skb->len;
qd->bstats.packets++;
return NET_XMIT_SUCCESS;
}
static struct sk_buff *pfifo_dequeue(struct Qdisc* qd)
{
struct sk_buff_head *q = qdisc_priv(qd);
return skb_dequeue(q);
}
static int pfifo_init(struct Qdisc* qd, struct rtattr *opt)
{
struct sk_buff_head *q = qdisc_priv(qd);
skb_queue_head_init(q);
return 0;
}
static void pfifo_reset(struct Qdisc* qd)
{
struct sk_buff_head *q = qdisc_priv(qd);
skb_queue_purge(q);
qd->q.qlen = 0;
}
static int pfifo_dump(struct Qdisc *qd, struct sk_buff *skb)
{
return skb->len;
}
struct Qdisc_ops pfifo_qdisc_ops =
{
.next = NULL,
.cl_ops = NULL,
.id = "ieee80211_pfifo",
.priv_size = sizeof(struct sk_buff_head),
.enqueue = pfifo_enqueue,
.dequeue = pfifo_dequeue,
.requeue = pfifo_requeue,
.drop = NULL,
.init = pfifo_init,
.reset = pfifo_reset,
.destroy = NULL,
.change = NULL,
.dump = pfifo_dump,
};
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