1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * net/sched/sch_blackhole.c	Black hole queue
 4 *
 5 * Authors:	Thomas Graf <tgraf@suug.ch>
 6 *
 7 * Note: Quantum tunneling is not supported.
 8 */
 9
10#include <linux/init.h>
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/skbuff.h>
14#include <net/pkt_sched.h>
15
16static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
17			     struct sk_buff **to_free)
18{
19	qdisc_drop(skb, sch, to_free);
20	return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
21}
22
23static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
24{
25	return NULL;
26}
27
28static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
29	.id		= "blackhole",
30	.priv_size	= 0,
31	.enqueue	= blackhole_enqueue,
32	.dequeue	= blackhole_dequeue,
33	.peek		= blackhole_dequeue,
34	.owner		= THIS_MODULE,
35};
36
37static int __init blackhole_init(void)
38{
39	return register_qdisc(&blackhole_qdisc_ops);
40}
41device_initcall(blackhole_init)

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * net/sched/sch_blackhole.c	Black hole queue
 4 *
 5 * Authors:	Thomas Graf <tgraf@suug.ch>
 6 *
 7 * Note: Quantum tunneling is not supported.
 8 */
 9
10#include <linux/init.h>
11#include <linux/types.h>
12#include <linux/kernel.h>
13#include <linux/skbuff.h>
14#include <net/pkt_sched.h>
15
16static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
17			     struct sk_buff **to_free)
18{
19	qdisc_drop(skb, sch, to_free);
20	return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
21}
22
23static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
24{
25	return NULL;
26}
27
28static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
29	.id		= "blackhole",
30	.priv_size	= 0,
31	.enqueue	= blackhole_enqueue,
32	.dequeue	= blackhole_dequeue,
33	.peek		= blackhole_dequeue,
34	.owner		= THIS_MODULE,
35};
36
37static int __init blackhole_init(void)
38{
39	return register_qdisc(&blackhole_qdisc_ops);
40}
41device_initcall(blackhole_init)