linux-imx

/*

 * net/sched/sch_blackhole.c    Black hole queue

 *

 *      This program is free software; you can redistribute it and/or

 *      modify it under the terms of the GNU General Public License

 *      as published by the Free Software Foundation; either version

 *      2 of the License, or (at your option) any later version.

 *

 * Authors: Thomas Graf <tgraf@suug.ch>

 *

 * Note: Quantum tunneling is not supported.

 */

​

#include <linux/init.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/skbuff.h>

#include <net/pkt_sched.h>

​

static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,

                 struct sk_buff **to_free)

{

    qdisc_drop(skb, sch, to_free);

    return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;

}

​

static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)

{

    return NULL;

}

​

static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {

    .id     = "blackhole",

    .priv_size  = 0,

    .enqueue    = blackhole_enqueue,

    .dequeue    = blackhole_dequeue,

    .peek       = blackhole_dequeue,

    .owner      = THIS_MODULE,

};

​

static int __init blackhole_init(void)

{

    return register_qdisc(&blackhole_qdisc_ops);

}

device_initcall(blackhole_init)