src/sd_blackhole.c

   1 /*
   2  * Lightweight Autonomic Network Architecture
   3  *
   4  * Blackhole scheduler.
   5  *
   6  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   7  * Swiss federal institute of technology (ETH Zurich)
   8  * Subject to the GPL.
   9  *
  10  * Note: Quantum tunneling is not supported, too.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/cache.h>
  16
  17 #include "xt_sched.h"
  18 #include "xt_engine.h"
  19
  20 static int ppe_blackhole_init(void)
  21 {
  22         return 0;
  23 }
  24
  25 static int ppe_blackhole_sched(struct sk_buff *skb, enum path_type dir)
  26 {
  27         /* ... entering the event horizon! */
  28         kfree(skb);
  29         return PPE_SUCCESS;
  30 }
  31
  32 static void ppe_blackhole_cleanup(void)
  33 {
  34 }
  35
  36 static struct ppesched_discipline_ops ppe_blackhole_ops __read_mostly = {
  37         .discipline_init = ppe_blackhole_init,
  38         .discipline_sched = ppe_blackhole_sched,
  39         .discipline_cleanup = ppe_blackhole_cleanup,
  40 };
  41
  42 static struct ppesched_discipline ppe_blackhole __read_mostly = {
  43         .name = "blackhole",
  44         .ops = &ppe_blackhole_ops,
  45         .owner = THIS_MODULE,
  46 };
  47
  48 static int __init init_ppe_blackhole_module(void)
  49 {
  50         return ppesched_discipline_register(&ppe_blackhole);
  51 }
  52
  53 static void __exit cleanup_ppe_blackhole_module(void)
  54 {
  55         return ppesched_discipline_unregister(&ppe_blackhole);
  56 }
  57
  58 module_init(init_ppe_blackhole_module);
  59 module_exit(cleanup_ppe_blackhole_module);
  60
  61 MODULE_LICENSE("GPL");
  62 MODULE_AUTHOR("Daniel Borkmann <dborkma@tik.ee.ethz.ch>");
  63 MODULE_DESCRIPTION("LANA black hole scheduler");
  64