| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 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) |