root/net/sched/sch_blackhole.c

DEFINITIONS

1. blackhole_enqueue
2. blackhole_dequeue
3. blackhole_module_init
4. blackhole_module_exit

/*
 * 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/module.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)
{
        qdisc_drop(skb, sch);
        return NET_XMIT_SUCCESS;
}

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,
        .owner          = THIS_MODULE,
};

static int __init blackhole_module_init(void)
{
        return register_qdisc(&blackhole_qdisc_ops);
}

static void __exit blackhole_module_exit(void)
{
        unregister_qdisc(&blackhole_qdisc_ops);
}

module_init(blackhole_module_init)
module_exit(blackhole_module_exit)

MODULE_LICENSE("GPL");