1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
3 * net/sched/sch_blackhole.c Black hole que 2 * net/sched/sch_blackhole.c Black hole queue
4 * 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 *
5 * Authors: Thomas Graf <tgraf@suug.ch> 9 * Authors: Thomas Graf <tgraf@suug.ch>
6 * 10 *
7 * Note: Quantum tunneling is not supported. 11 * Note: Quantum tunneling is not supported.
8 */ 12 */
9 13
10 #include <linux/init.h> 14 #include <linux/init.h>
11 #include <linux/types.h> 15 #include <linux/types.h>
12 #include <linux/kernel.h> 16 #include <linux/kernel.h>
13 #include <linux/skbuff.h> 17 #include <linux/skbuff.h>
14 #include <net/pkt_sched.h> 18 #include <net/pkt_sched.h>
15 19
16 static int blackhole_enqueue(struct sk_buff *s 20 static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
17 struct sk_buff ** 21 struct sk_buff **to_free)
18 { 22 {
19 qdisc_drop(skb, sch, to_free); 23 qdisc_drop(skb, sch, to_free);
20 return NET_XMIT_SUCCESS | __NET_XMIT_B !! 24 return NET_XMIT_SUCCESS;
21 } 25 }
22 26
23 static struct sk_buff *blackhole_dequeue(struc 27 static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
24 { 28 {
25 return NULL; 29 return NULL;
26 } 30 }
27 31
28 static struct Qdisc_ops blackhole_qdisc_ops __ 32 static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
29 .id = "blackhole", 33 .id = "blackhole",
30 .priv_size = 0, 34 .priv_size = 0,
31 .enqueue = blackhole_enqueue, 35 .enqueue = blackhole_enqueue,
32 .dequeue = blackhole_dequeue, 36 .dequeue = blackhole_dequeue,
33 .peek = blackhole_dequeue, 37 .peek = blackhole_dequeue,
34 .owner = THIS_MODULE, 38 .owner = THIS_MODULE,
35 }; 39 };
36 40
37 static int __init blackhole_init(void) 41 static int __init blackhole_init(void)
38 { 42 {
39 return register_qdisc(&blackhole_qdisc 43 return register_qdisc(&blackhole_qdisc_ops);
40 } 44 }
41 device_initcall(blackhole_init) 45 device_initcall(blackhole_init)
42 46
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