blob: c98a61e980baa68931f7e974582eb1c43ed60cf5 [file] [log] [blame]
Thomas Graf63d886c2005-07-05 15:29:16 -07001/*
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
Paul Gortmaker075640e2015-10-07 17:27:45 -040014#include <linux/init.h>
Thomas Graf63d886c2005-07-05 15:29:16 -070015#include <linux/types.h>
16#include <linux/kernel.h>
Thomas Graf63d886c2005-07-05 15:29:16 -070017#include <linux/skbuff.h>
18#include <net/pkt_sched.h>
19
Eric Dumazet520ac302016-06-21 23:16:49 -070020static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
21 struct sk_buff **to_free)
Thomas Graf63d886c2005-07-05 15:29:16 -070022{
Eric Dumazet520ac302016-06-21 23:16:49 -070023 qdisc_drop(skb, sch, to_free);
Thomas Graf63d886c2005-07-05 15:29:16 -070024 return NET_XMIT_SUCCESS;
25}
26
27static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
28{
29 return NULL;
30}
31
Eric Dumazet20fea082007-11-14 01:44:41 -080032static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
Thomas Graf63d886c2005-07-05 15:29:16 -070033 .id = "blackhole",
34 .priv_size = 0,
35 .enqueue = blackhole_enqueue,
36 .dequeue = blackhole_dequeue,
Jarek Poplawski8e3af972008-10-31 00:45:55 -070037 .peek = blackhole_dequeue,
Thomas Graf63d886c2005-07-05 15:29:16 -070038 .owner = THIS_MODULE,
39};
40
Paul Gortmaker075640e2015-10-07 17:27:45 -040041static int __init blackhole_init(void)
Thomas Graf63d886c2005-07-05 15:29:16 -070042{
43 return register_qdisc(&blackhole_qdisc_ops);
44}
Paul Gortmaker075640e2015-10-07 17:27:45 -040045device_initcall(blackhole_init)