net/netfilter/nf_conntrack_acct.c

// SPDX-License-Identifier: GPL-2.0-only
/* Accounting handling for netfilter. */

/*
 * (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/netfilter.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/export.h>

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>

static bool nf_ct_acct __read_mostly;

module_param_named(acct, nf_ct_acct, bool, 0644);
MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");

static const struct nf_ct_ext_type acct_extend = {
	.len	= sizeof(struct nf_conn_acct),
	.align	= __alignof__(struct nf_conn_acct),
	.id	= NF_CT_EXT_ACCT,
};

void nf_conntrack_acct_pernet_init(struct net *net)
{
	net->ct.sysctl_acct = nf_ct_acct;
}

int nf_conntrack_acct_init(void)
{
	int ret = nf_ct_extend_register(&acct_extend);
	if (ret < 0)
		pr_err("Unable to register extension\n");
	return ret;
}

void nf_conntrack_acct_fini(void)
{
	nf_ct_extend_unregister(&acct_extend);
}