act_meta_skbtcindex.c 1.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * net/sched/act_meta_tc_index.c IFE skb->tc_index metadata module
  4. *
  5. * copyright Jamal Hadi Salim (2016)
  6. */
  7. #include <linux/types.h>
  8. #include <linux/kernel.h>
  9. #include <linux/string.h>
  10. #include <linux/errno.h>
  11. #include <linux/skbuff.h>
  12. #include <linux/rtnetlink.h>
  13. #include <linux/module.h>
  14. #include <linux/init.h>
  15. #include <net/netlink.h>
  16. #include <net/pkt_sched.h>
  17. #include <uapi/linux/tc_act/tc_ife.h>
  18. #include <net/tc_act/tc_ife.h>
  19. static int skbtcindex_encode(struct sk_buff *skb, void *skbdata,
  20. struct tcf_meta_info *e)
  21. {
  22. u32 ifetc_index = skb->tc_index;
  23. return ife_encode_meta_u16(ifetc_index, skbdata, e);
  24. }
  25. static int skbtcindex_decode(struct sk_buff *skb, void *data, u16 len)
  26. {
  27. u16 ifetc_index = *(u16 *)data;
  28. skb->tc_index = ntohs(ifetc_index);
  29. return 0;
  30. }
  31. static int skbtcindex_check(struct sk_buff *skb, struct tcf_meta_info *e)
  32. {
  33. return ife_check_meta_u16(skb->tc_index, e);
  34. }
  35. static struct tcf_meta_ops ife_skbtcindex_ops = {
  36. .metaid = IFE_META_TCINDEX,
  37. .metatype = NLA_U16,
  38. .name = "tc_index",
  39. .synopsis = "skb tc_index 16 bit metadata",
  40. .check_presence = skbtcindex_check,
  41. .encode = skbtcindex_encode,
  42. .decode = skbtcindex_decode,
  43. .get = ife_get_meta_u16,
  44. .alloc = ife_alloc_meta_u16,
  45. .release = ife_release_meta_gen,
  46. .validate = ife_validate_meta_u16,
  47. .owner = THIS_MODULE,
  48. };
  49. static int __init ifetc_index_init_module(void)
  50. {
  51. return register_ife_op(&ife_skbtcindex_ops);
  52. }
  53. static void __exit ifetc_index_cleanup_module(void)
  54. {
  55. unregister_ife_op(&ife_skbtcindex_ops);
  56. }
  57. module_init(ifetc_index_init_module);
  58. module_exit(ifetc_index_cleanup_module);
  59. MODULE_AUTHOR("Jamal Hadi Salim(2016)");
  60. MODULE_DESCRIPTION("Inter-FE skb tc_index metadata module");
  61. MODULE_LICENSE("GPL");
  62. MODULE_ALIAS_IFE_META("tcindex");