[net-next-2.6.git] / net / netfilter / nf_conntrack_acct.c

/* Accouting handling for netfilter. */

/*
 * (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

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

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

#ifdef CONFIG_NF_CT_ACCT
#define NF_CT_ACCT_DEFAULT 1
#else
#define NF_CT_ACCT_DEFAULT 0
#endif

static int nf_ct_acct __read_mostly = NF_CT_ACCT_DEFAULT;

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

#ifdef CONFIG_SYSCTL
static struct ctl_table acct_sysctl_table[] = {
	{
		.procname	= "nf_conntrack_acct",
		.data		= &init_net.ct.sysctl_acct,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{}
};
#endif /* CONFIG_SYSCTL */

unsigned int
seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
{
	struct nf_conn_counter *acct;

	acct = nf_conn_acct_find(ct);
	if (!acct)
		return 0;

	return seq_printf(s, "packets=%llu bytes=%llu ",
			  (unsigned long long)acct[dir].packets,
			  (unsigned long long)acct[dir].bytes);
};
EXPORT_SYMBOL_GPL(seq_print_acct);

static struct nf_ct_ext_type acct_extend __read_mostly = {
	.len	= sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]),
	.align	= __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]),
	.id	= NF_CT_EXT_ACCT,
};

#ifdef CONFIG_SYSCTL
static int nf_conntrack_acct_init_sysctl(struct net *net)
{
	struct ctl_table *table;

	table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table),
			GFP_KERNEL);
	if (!table)
		goto out;

	table[0].data = &net->ct.sysctl_acct;

	net->ct.acct_sysctl_header = register_net_sysctl_table(net,
			nf_net_netfilter_sysctl_path, table);
	if (!net->ct.acct_sysctl_header) {
		printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n");
		goto out_register;
	}
	return 0;

out_register:
	kfree(table);
out:
	return -ENOMEM;
}

static void nf_conntrack_acct_fini_sysctl(struct net *net)
{
	struct ctl_table *table;

	table = net->ct.acct_sysctl_header->ctl_table_arg;
	unregister_net_sysctl_table(net->ct.acct_sysctl_header);
	kfree(table);
}
#else
static int nf_conntrack_acct_init_sysctl(struct net *net)
{
	return 0;
}

static void nf_conntrack_acct_fini_sysctl(struct net *net)
{
}
#endif

int nf_conntrack_acct_init(struct net *net)
{
	int ret;

	net->ct.sysctl_acct = nf_ct_acct;

	if (net_eq(net, &init_net)) {
#ifdef CONFIG_NF_CT_ACCT
	printk(KERN_WARNING "CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use\n");
		printk(KERN_WARNING "nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or\n");
		printk(KERN_WARNING "sysctl net.netfilter.nf_conntrack_acct=1 to enable it.\n");
#endif

		ret = nf_ct_extend_register(&acct_extend);
		if (ret < 0) {
			printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
			goto out_extend_register;
		}
	}

	ret = nf_conntrack_acct_init_sysctl(net);
	if (ret < 0)
		goto out_sysctl;

	return 0;

out_sysctl:
	if (net_eq(net, &init_net))
		nf_ct_extend_unregister(&acct_extend);
out_extend_register:
	return ret;
}

void nf_conntrack_acct_fini(struct net *net)
{
	nf_conntrack_acct_fini_sysctl(net);
	if (net_eq(net, &init_net))
		nf_ct_extend_unregister(&acct_extend);
}
Commit	Line	Data
58401572 KPO	1	/* Accouting handling for netfilter. */
	2
	3	/*
	4	* (C) 2008 Krzysztof Piotr Oledzki <ole@ans.pl>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/netfilter.h>
5a0e3ad6	12	#include <linux/slab.h>
58401572 KPO	13	#include <linux/kernel.h>
	14	#include <linux/moduleparam.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	#ifdef CONFIG_NF_CT_ACCT
	21	#define NF_CT_ACCT_DEFAULT 1
	22	#else
	23	#define NF_CT_ACCT_DEFAULT 0
	24	#endif
	25
d716a4df	26	static int nf_ct_acct __read_mostly = NF_CT_ACCT_DEFAULT;
58401572 KPO	27
	28	module_param_named(acct, nf_ct_acct, bool, 0644);
	29	MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
	30
	31	#ifdef CONFIG_SYSCTL
58401572 KPO	32	static struct ctl_table acct_sysctl_table[] = {
58401572 KPO	33	{
58401572	34	.procname = "nf_conntrack_acct",
d716a4df	35	.data = &init_net.ct.sysctl_acct,
58401572 KPO	36	.maxlen = sizeof(unsigned int),
58401572 KPO	37	.mode = 0644,
6d9f239a	38	.proc_handler = proc_dointvec,
58401572 KPO	39	},
	40	{}
	41	};
	42	#endif /* CONFIG_SYSCTL */
	43
	44	unsigned int
	45	seq_print_acct(struct seq_file s, const struct nf_conn ct, int dir)
	46	{
	47	struct nf_conn_counter *acct;
	48
	49	acct = nf_conn_acct_find(ct);
	50	if (!acct)
	51	return 0;
	52
	53	return seq_printf(s, "packets=%llu bytes=%llu ",
	54	(unsigned long long)acct[dir].packets,
	55	(unsigned long long)acct[dir].bytes);
	56	};
	57	EXPORT_SYMBOL_GPL(seq_print_acct);
	58
	59	static struct nf_ct_ext_type acct_extend __read_mostly = {
	60	.len = sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]),
	61	.align = __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]),
	62	.id = NF_CT_EXT_ACCT,
	63	};
	64
d716a4df AD	65	#ifdef CONFIG_SYSCTL
d716a4df AD	66	static int nf_conntrack_acct_init_sysctl(struct net *net)
58401572	67	{
d716a4df	68	struct ctl_table *table;
58401572	69
d716a4df AD	70	table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table),
	71	GFP_KERNEL);
	72	if (!table)
	73	goto out;
	74
	75	table[0].data = &net->ct.sysctl_acct;
58401572	76
d716a4df AD	77	net->ct.acct_sysctl_header = register_net_sysctl_table(net,
	78	nf_net_netfilter_sysctl_path, table);
	79	if (!net->ct.acct_sysctl_header) {
	80	printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n");
	81	goto out_register;
58401572	82	}
d716a4df	83	return 0;
58401572	84
d716a4df AD	85	out_register:
	86	kfree(table);
	87	out:
	88	return -ENOMEM;
	89	}
58401572	90
d716a4df AD	91	static void nf_conntrack_acct_fini_sysctl(struct net *net)
	92	{
	93	struct ctl_table *table;
58401572	94
d716a4df AD	95	table = net->ct.acct_sysctl_header->ctl_table_arg;
	96	unregister_net_sysctl_table(net->ct.acct_sysctl_header);
	97	kfree(table);
	98	}
	99	#else
	100	static int nf_conntrack_acct_init_sysctl(struct net *net)
	101	{
	102	return 0;
	103	}
	104
	105	static void nf_conntrack_acct_fini_sysctl(struct net *net)
	106	{
	107	}
	108	#endif
	109
	110	int nf_conntrack_acct_init(struct net *net)
	111	{
	112	int ret;
	113
	114	net->ct.sysctl_acct = nf_ct_acct;
	115
	116	if (net_eq(net, &init_net)) {
	117	#ifdef CONFIG_NF_CT_ACCT
404d0ae2	118	printk(KERN_WARNING "CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use\n");
6d60f9df	119	printk(KERN_WARNING "nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or\n");
d716a4df	120	printk(KERN_WARNING "sysctl net.netfilter.nf_conntrack_acct=1 to enable it.\n");
58401572 KPO	121	#endif
58401572 KPO	122
d716a4df AD	123	ret = nf_ct_extend_register(&acct_extend);
	124	if (ret < 0) {
	125	printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
	126	goto out_extend_register;
	127	}
	128	}
	129
	130	ret = nf_conntrack_acct_init_sysctl(net);
	131	if (ret < 0)
	132	goto out_sysctl;
	133
58401572	134	return 0;
d716a4df AD	135
	136	out_sysctl:
	137	if (net_eq(net, &init_net))
	138	nf_ct_extend_unregister(&acct_extend);
	139	out_extend_register:
	140	return ret;
58401572 KPO	141	}
58401572 KPO	142
d716a4df	143	void nf_conntrack_acct_fini(struct net *net)
58401572	144	{
d716a4df AD	145	nf_conntrack_acct_fini_sysctl(net);
	146	if (net_eq(net, &init_net))
	147	nf_ct_extend_unregister(&acct_extend);
58401572	148	}