163d886c9SThomas Graf /* 263d886c9SThomas Graf * net/sched/sch_blackhole.c Black hole queue 363d886c9SThomas Graf * 463d886c9SThomas Graf * This program is free software; you can redistribute it and/or 563d886c9SThomas Graf * modify it under the terms of the GNU General Public License 663d886c9SThomas Graf * as published by the Free Software Foundation; either version 763d886c9SThomas Graf * 2 of the License, or (at your option) any later version. 863d886c9SThomas Graf * 963d886c9SThomas Graf * Authors: Thomas Graf <tgraf@suug.ch> 1063d886c9SThomas Graf * 1163d886c9SThomas Graf * Note: Quantum tunneling is not supported. 1263d886c9SThomas Graf */ 1363d886c9SThomas Graf 14075640e3SPaul Gortmaker #include <linux/init.h> 1563d886c9SThomas Graf #include <linux/types.h> 1663d886c9SThomas Graf #include <linux/kernel.h> 1763d886c9SThomas Graf #include <linux/skbuff.h> 1863d886c9SThomas Graf #include <net/pkt_sched.h> 1963d886c9SThomas Graf 20*520ac30fSEric Dumazet static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch, 21*520ac30fSEric Dumazet struct sk_buff **to_free) 2263d886c9SThomas Graf { 23*520ac30fSEric Dumazet qdisc_drop(skb, sch, to_free); 2463d886c9SThomas Graf return NET_XMIT_SUCCESS; 2563d886c9SThomas Graf } 2663d886c9SThomas Graf 2763d886c9SThomas Graf static struct sk_buff *blackhole_dequeue(struct Qdisc *sch) 2863d886c9SThomas Graf { 2963d886c9SThomas Graf return NULL; 3063d886c9SThomas Graf } 3163d886c9SThomas Graf 3220fea08bSEric Dumazet static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = { 3363d886c9SThomas Graf .id = "blackhole", 3463d886c9SThomas Graf .priv_size = 0, 3563d886c9SThomas Graf .enqueue = blackhole_enqueue, 3663d886c9SThomas Graf .dequeue = blackhole_dequeue, 378e3af978SJarek Poplawski .peek = blackhole_dequeue, 3863d886c9SThomas Graf .owner = THIS_MODULE, 3963d886c9SThomas Graf }; 4063d886c9SThomas Graf 41075640e3SPaul Gortmaker static int __init blackhole_init(void) 4263d886c9SThomas Graf { 4363d886c9SThomas Graf return register_qdisc(&blackhole_qdisc_ops); 4463d886c9SThomas Graf } 45075640e3SPaul Gortmaker device_initcall(blackhole_init) 46