root/net/netfilter/nf_conntrack_timestamp.c

DEFINITIONS

1. nf_conntrack_tstamp_pernet_init
2. nf_conntrack_tstamp_init
3. nf_conntrack_tstamp_fini

   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 
  17 static bool nf_ct_tstamp __read_mostly;
  18 
  19 module_param_named(tstamp, nf_ct_tstamp, bool, 0644);
  20 MODULE_PARM_DESC(tstamp, "Enable connection tracking flow timestamping.");
  21 
  22 static 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 
  28 void nf_conntrack_tstamp_pernet_init(struct net *net)
  29 {
  30         net->ct.sysctl_tstamp = nf_ct_tstamp;
  31 }
  32 
  33 int 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 
  42 void nf_conntrack_tstamp_fini(void)
  43 {
  44         nf_ct_extend_unregister(&tstamp_extend);
  45 }