1e90474c37
Convert packet schedulers to use the netlink API. Unfortunately a gradual conversion is not possible without breaking compilation in the middle or adding lots of casts, so this patch converts them all in one step. The patch has been mostly generated automatically with some minor edits to at least allow seperate conversion of classifiers and actions. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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* net/sched/sch_fifo.c The simplest FIFO queue.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/skbuff.h>
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#include <net/pkt_sched.h>
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/* 1 band FIFO pseudo-"scheduler" */
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struct fifo_sched_data
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{
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u32 limit;
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};
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static int bfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
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{
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struct fifo_sched_data *q = qdisc_priv(sch);
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if (likely(sch->qstats.backlog + skb->len <= q->limit))
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return qdisc_enqueue_tail(skb, sch);
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return qdisc_reshape_fail(skb, sch);
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}
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static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc* sch)
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{
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struct fifo_sched_data *q = qdisc_priv(sch);
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if (likely(skb_queue_len(&sch->q) < q->limit))
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return qdisc_enqueue_tail(skb, sch);
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return qdisc_reshape_fail(skb, sch);
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}
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static int fifo_init(struct Qdisc *sch, struct nlattr *opt)
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{
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struct fifo_sched_data *q = qdisc_priv(sch);
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if (opt == NULL) {
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u32 limit = sch->dev->tx_queue_len ? : 1;
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if (sch->ops == &bfifo_qdisc_ops)
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limit *= sch->dev->mtu;
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q->limit = limit;
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} else {
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struct tc_fifo_qopt *ctl = nla_data(opt);
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if (nla_len(opt) < sizeof(*ctl))
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return -EINVAL;
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q->limit = ctl->limit;
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}
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return 0;
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}
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static int fifo_dump(struct Qdisc *sch, struct sk_buff *skb)
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{
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struct fifo_sched_data *q = qdisc_priv(sch);
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struct tc_fifo_qopt opt = { .limit = q->limit };
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NLA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt);
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return skb->len;
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nla_put_failure:
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return -1;
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}
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struct Qdisc_ops pfifo_qdisc_ops __read_mostly = {
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.id = "pfifo",
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.priv_size = sizeof(struct fifo_sched_data),
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.enqueue = pfifo_enqueue,
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.dequeue = qdisc_dequeue_head,
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.requeue = qdisc_requeue,
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.drop = qdisc_queue_drop,
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.init = fifo_init,
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.reset = qdisc_reset_queue,
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.change = fifo_init,
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.dump = fifo_dump,
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.owner = THIS_MODULE,
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};
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EXPORT_SYMBOL(pfifo_qdisc_ops);
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struct Qdisc_ops bfifo_qdisc_ops __read_mostly = {
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.id = "bfifo",
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.priv_size = sizeof(struct fifo_sched_data),
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.enqueue = bfifo_enqueue,
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.dequeue = qdisc_dequeue_head,
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.requeue = qdisc_requeue,
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.drop = qdisc_queue_drop,
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.init = fifo_init,
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.reset = qdisc_reset_queue,
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.change = fifo_init,
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.dump = fifo_dump,
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.owner = THIS_MODULE,
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};
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EXPORT_SYMBOL(bfifo_qdisc_ops);
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