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"); 54