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) 46