1/*
2 * net/sched/sch_blackhole.c	Black hole queue
3 *
4 *		This program is free software; you can redistribute it and/or
5 *		modify it under the terms of the GNU General Public License
6 *		as published by the Free Software Foundation; either version
7 *		2 of the License, or (at your option) any later version.
8 *
9 * Authors:	Thomas Graf <tgraf@suug.ch>
10 *
11 * Note: Quantum tunneling is not supported.
12 */
13
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
17#include <linux/netdevice.h>
18#include <linux/skbuff.h>
19#include <net/pkt_sched.h>
20
21static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch)
22{
23	qdisc_drop(skb, sch);
24	return NET_XMIT_SUCCESS;
25}
26
27static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
28{
29	return NULL;
30}
31
32static struct Qdisc_ops blackhole_qdisc_ops = {
33	.id		= "blackhole",
34	.priv_size	= 0,
35	.enqueue	= blackhole_enqueue,
36	.dequeue	= blackhole_dequeue,
37	.owner		= THIS_MODULE,
38};
39
40static int __init blackhole_module_init(void)
41{
42	return register_qdisc(&blackhole_qdisc_ops);
43}
44
45static void __exit blackhole_module_exit(void)
46{
47	unregister_qdisc(&blackhole_qdisc_ops);
48}
49
50module_init(blackhole_module_init)
51module_exit(blackhole_module_exit)
52
53MODULE_LICENSE("GPL");
54