Merge branch 'for-usb-linus' of master.kernel.org:/pub/scm/linux/kernel/git/sarah...
[platform/adaptation/renesas_rcar/renesas_kernel.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/module.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 {
22         qdisc_drop(skb, sch);
23         return NET_XMIT_SUCCESS;
24 }
25
26 static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
27 {
28         return NULL;
29 }
30
31 static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
32         .id             = "blackhole",
33         .priv_size      = 0,
34         .enqueue        = blackhole_enqueue,
35         .dequeue        = blackhole_dequeue,
36         .peek           = blackhole_dequeue,
37         .owner          = THIS_MODULE,
38 };
39
40 static int __init blackhole_module_init(void)
41 {
42         return register_qdisc(&blackhole_qdisc_ops);
43 }
44
45 static void __exit blackhole_module_exit(void)
46 {
47         unregister_qdisc(&blackhole_qdisc_ops);
48 }
49
50 module_init(blackhole_module_init)
51 module_exit(blackhole_module_exit)
52
53 MODULE_LICENSE("GPL");