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/config.h> 15 #include <linux/module.h> 16 #include <linux/types.h> 17 #include <linux/kernel.h> 18 #include <linux/netdevice.h> 19 #include <linux/skbuff.h> 20 #include <net/pkt_sched.h> 21 22 static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch) 23 { 24 qdisc_drop(skb, sch); 25 return NET_XMIT_SUCCESS; 26 } 27 28 static struct sk_buff *blackhole_dequeue(struct Qdisc *sch) 29 { 30 return NULL; 31 } 32 33 static struct Qdisc_ops blackhole_qdisc_ops = { 34 .id = "blackhole", 35 .priv_size = 0, 36 .enqueue = blackhole_enqueue, 37 .dequeue = blackhole_dequeue, 38 .owner = THIS_MODULE, 39 }; 40 41 static int __init blackhole_module_init(void) 42 { 43 return register_qdisc(&blackhole_qdisc_ops); 44 } 45 46 static void __exit blackhole_module_exit(void) 47 { 48 unregister_qdisc(&blackhole_qdisc_ops); 49 } 50 51 module_init(blackhole_module_init) 52 module_exit(blackhole_module_exit) 53 54 MODULE_LICENSE("GPL"); 55