GNU Linux-libre 4.19.211-gnu1
[releases.git] / net / sched / sch_blackhole.c
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/init.h>
15 #include <linux/types.h>
16 #include <linux/kernel.h>
17 #include <linux/skbuff.h>
18 #include <net/pkt_sched.h>
19
20 static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
21                              struct sk_buff **to_free)
22 {
23         qdisc_drop(skb, sch, to_free);
24         return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
25 }
26
27 static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
28 {
29         return NULL;
30 }
31
32 static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
33         .id             = "blackhole",
34         .priv_size      = 0,
35         .enqueue        = blackhole_enqueue,
36         .dequeue        = blackhole_dequeue,
37         .peek           = blackhole_dequeue,
38         .owner          = THIS_MODULE,
39 };
40
41 static int __init blackhole_init(void)
42 {
43         return register_qdisc(&blackhole_qdisc_ops);
44 }
45 device_initcall(blackhole_init)