net/netfilter/nf_conntrack_acct.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /* Accouting handling for netfilter. */
   3
   4 /*
   5  * (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
   6  */
   7
   8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/netfilter.h>
  11 #include <linux/slab.h>
  12 #include <linux/kernel.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/export.h>
  15
  16 #include <net/netfilter/nf_conntrack.h>
  17 #include <net/netfilter/nf_conntrack_extend.h>
  18 #include <net/netfilter/nf_conntrack_acct.h>
  19
  20 static bool nf_ct_acct __read_mostly;
  21
  22 module_param_named(acct, nf_ct_acct, bool, 0644);
  23 MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
  24
  25 static const struct nf_ct_ext_type acct_extend = {
  26         .len    = sizeof(struct nf_conn_acct),
  27         .align  = __alignof__(struct nf_conn_acct),
  28         .id     = NF_CT_EXT_ACCT,
  29 };
  30
  31 void nf_conntrack_acct_pernet_init(struct net *net)
  32 {
  33         net->ct.sysctl_acct = nf_ct_acct;
  34 }
  35
  36 int nf_conntrack_acct_init(void)
  37 {
  38         int ret = nf_ct_extend_register(&acct_extend);
  39         if (ret < 0)
  40                 pr_err("Unable to register extension\n");
  41         return ret;
  42 }
  43
  44 void nf_conntrack_acct_fini(void)
  45 {
  46         nf_ct_extend_unregister(&acct_extend);
  47 }