sch_blackhole.c 924 B

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * net/sched/sch_blackhole.c Black hole queue
  4. *
  5. * Authors: Thomas Graf <tgraf@suug.ch>
  6. *
  7. * Note: Quantum tunneling is not supported.
  8. */
  9. #include <linux/init.h>
  10. #include <linux/types.h>
  11. #include <linux/kernel.h>
  12. #include <linux/skbuff.h>
  13. #include <net/pkt_sched.h>
  14. static int blackhole_enqueue(struct sk_buff *skb, struct Qdisc *sch,
  15. struct sk_buff **to_free)
  16. {
  17. qdisc_drop(skb, sch, to_free);
  18. return NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;
  19. }
  20. static struct sk_buff *blackhole_dequeue(struct Qdisc *sch)
  21. {
  22. return NULL;
  23. }
  24. static struct Qdisc_ops blackhole_qdisc_ops __read_mostly = {
  25. .id = "blackhole",
  26. .priv_size = 0,
  27. .enqueue = blackhole_enqueue,
  28. .dequeue = blackhole_dequeue,
  29. .peek = blackhole_dequeue,
  30. .owner = THIS_MODULE,
  31. };
  32. static int __init blackhole_init(void)
  33. {
  34. return register_qdisc(&blackhole_qdisc_ops);
  35. }
  36. device_initcall(blackhole_init)