nf_conntrack_timestamp.c 1.1 KB

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  1. // SPDX-License-Identifier: GPL-2.0-or-later
  2. /*
  3. * (C) 2010 Pablo Neira Ayuso <pablo@netfilter.org>
  4. */
  5. #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  6. #include <linux/netfilter.h>
  7. #include <linux/slab.h>
  8. #include <linux/kernel.h>
  9. #include <linux/moduleparam.h>
  10. #include <net/netfilter/nf_conntrack.h>
  11. #include <net/netfilter/nf_conntrack_extend.h>
  12. #include <net/netfilter/nf_conntrack_timestamp.h>
  13. static bool nf_ct_tstamp __read_mostly;
  14. module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
  15. MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
  16. static const struct nf_ct_ext_type tstamp_extend = {
  17. .len = sizeof(struct nf_conn_tstamp),
  18. .align = __alignof__(struct nf_conn_tstamp),
  19. .id = NF_CT_EXT_TSTAMP,
  20. };
  21. void nf_conntrack_tstamp_pernet_init(struct net *net)
  22. {
  23. net->ct.sysctl_tstamp = nf_ct_tstamp;
  24. }
  25. int nf_conntrack_tstamp_init(void)
  26. {
  27. int ret;
  28. ret = nf_ct_extend_register(&tstamp_extend);
  29. if (ret < 0)
  30. pr_err("Unable to register extension\n");
  31. return ret;
  32. }
  33. void nf_conntrack_tstamp_fini(void)
  34. {
  35. nf_ct_extend_unregister(&tstamp_extend);
  36. }