LXR linux/net/netfilter/nf_conntrack

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * (C) 2010 Pablo Neira Ayuso <pablo@netfilter.org>
   4 */
   5
   6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   7
   8#include <linux/netfilter.h>
   9#include <linux/slab.h>
  10#include <linux/kernel.h>
  11#include <linux/moduleparam.h>
  12
  13#include <net/netfilter/nf_conntrack.h>
  14#include <net/netfilter/nf_conntrack_extend.h>
  15#include <net/netfilter/nf_conntrack_timestamp.h>
  16
  17static bool nf_ct_tstamp __read_mostly;
  18
  19module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
  20MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
  21
  22static const struct nf_ct_ext_type tstamp_extend = {
  23        .len    = sizeof(struct nf_conn_tstamp),
  24        .align  = __alignof__(struct nf_conn_tstamp),
  25        .id     = NF_CT_EXT_TSTAMP,
  26};
  27
  28void nf_conntrack_tstamp_pernet_init(struct net *net)
  29{
  30        net->ct.sysctl_tstamp = nf_ct_tstamp;
  31}
  32
  33int nf_conntrack_tstamp_init(void)
  34{
  35        int ret;
  36        ret = nf_ct_extend_register(&tstamp_extend);
  37        if (ret < 0)
  38                pr_err("Unable to register extension\n");
  39        return ret;
  40}
  41
  42void nf_conntrack_tstamp_fini(void)
  43{
  44        nf_ct_extend_unregister(&tstamp_extend);
  45}
  46