[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/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>
	12	#include <linux/kernel.h>
	13	#include <linux/moduleparam.h>
	14
	15	#include <net/netfilter/nf_conntrack.h>
	16	#include <net/netfilter/nf_conntrack_extend.h>
	17	#include <net/netfilter/nf_conntrack_acct.h>
	18
	19	#ifdef CONFIG_NF_CT_ACCT
	20	#define NF_CT_ACCT_DEFAULT 1
	21	#else
	22	#define NF_CT_ACCT_DEFAULT 0
	23	#endif
	24
d716a4df	25	static int nf_ct_acct __read_mostly = NF_CT_ACCT_DEFAULT;
58401572 KPO	26
	27	module_param_named(acct, nf_ct_acct, bool, 0644);
	28	MODULE_PARM_DESC(acct, "Enable connection tracking flow accounting.");
	29
	30	#ifdef CONFIG_SYSCTL
58401572 KPO	31	static struct ctl_table acct_sysctl_table[] = {
58401572 KPO	32	{
58401572	33	.procname = "nf_conntrack_acct",
d716a4df	34	.data = &init_net.ct.sysctl_acct,
58401572 KPO	35	.maxlen = sizeof(unsigned int),
58401572 KPO	36	.mode = 0644,
6d9f239a	37	.proc_handler = proc_dointvec,
58401572 KPO	38	},
	39	{}
	40	};
	41	#endif /* CONFIG_SYSCTL */
	42
	43	unsigned int
	44	seq_print_acct(struct seq_file s, const struct nf_conn ct, int dir)
	45	{
	46	struct nf_conn_counter *acct;
	47
	48	acct = nf_conn_acct_find(ct);
	49	if (!acct)
	50	return 0;
	51
	52	return seq_printf(s, "packets=%llu bytes=%llu ",
	53	(unsigned long long)acct[dir].packets,
	54	(unsigned long long)acct[dir].bytes);
	55	};
	56	EXPORT_SYMBOL_GPL(seq_print_acct);
	57
	58	static struct nf_ct_ext_type acct_extend __read_mostly = {
	59	.len = sizeof(struct nf_conn_counter[IP_CT_DIR_MAX]),
	60	.align = __alignof__(struct nf_conn_counter[IP_CT_DIR_MAX]),
	61	.id = NF_CT_EXT_ACCT,
	62	};
	63
d716a4df AD	64	#ifdef CONFIG_SYSCTL
d716a4df AD	65	static int nf_conntrack_acct_init_sysctl(struct net *net)
58401572	66	{
d716a4df	67	struct ctl_table *table;
58401572	68
d716a4df AD	69	table = kmemdup(acct_sysctl_table, sizeof(acct_sysctl_table),
	70	GFP_KERNEL);
	71	if (!table)
	72	goto out;
	73
	74	table[0].data = &net->ct.sysctl_acct;
58401572	75
d716a4df AD	76	net->ct.acct_sysctl_header = register_net_sysctl_table(net,
	77	nf_net_netfilter_sysctl_path, table);
	78	if (!net->ct.acct_sysctl_header) {
	79	printk(KERN_ERR "nf_conntrack_acct: can't register to sysctl.\n");
	80	goto out_register;
58401572	81	}
d716a4df	82	return 0;
58401572	83
d716a4df AD	84	out_register:
	85	kfree(table);
	86	out:
	87	return -ENOMEM;
	88	}
58401572	89
d716a4df AD	90	static void nf_conntrack_acct_fini_sysctl(struct net *net)
	91	{
	92	struct ctl_table *table;
58401572	93
d716a4df AD	94	table = net->ct.acct_sysctl_header->ctl_table_arg;
	95	unregister_net_sysctl_table(net->ct.acct_sysctl_header);
	96	kfree(table);
	97	}
	98	#else
	99	static int nf_conntrack_acct_init_sysctl(struct net *net)
	100	{
	101	return 0;
	102	}
	103
	104	static void nf_conntrack_acct_fini_sysctl(struct net *net)
	105	{
	106	}
	107	#endif
	108
	109	int nf_conntrack_acct_init(struct net *net)
	110	{
	111	int ret;
	112
	113	net->ct.sysctl_acct = nf_ct_acct;
	114
	115	if (net_eq(net, &init_net)) {
	116	#ifdef CONFIG_NF_CT_ACCT
404d0ae2	117	printk(KERN_WARNING "CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use\n");
6d60f9df	118	printk(KERN_WARNING "nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or\n");
d716a4df	119	printk(KERN_WARNING "sysctl net.netfilter.nf_conntrack_acct=1 to enable it.\n");
58401572 KPO	120	#endif
58401572 KPO	121
d716a4df AD	122	ret = nf_ct_extend_register(&acct_extend);
	123	if (ret < 0) {
	124	printk(KERN_ERR "nf_conntrack_acct: Unable to register extension\n");
	125	goto out_extend_register;
	126	}
	127	}
	128
	129	ret = nf_conntrack_acct_init_sysctl(net);
	130	if (ret < 0)
	131	goto out_sysctl;
	132
58401572	133	return 0;
d716a4df AD	134
	135	out_sysctl:
	136	if (net_eq(net, &init_net))
	137	nf_ct_extend_unregister(&acct_extend);
	138	out_extend_register:
	139	return ret;
58401572 KPO	140	}
58401572 KPO	141
d716a4df	142	void nf_conntrack_acct_fini(struct net *net)
58401572	143	{
d716a4df AD	144	nf_conntrack_acct_fini_sysctl(net);
	145	if (net_eq(net, &init_net))
	146	nf_ct_extend_unregister(&acct_extend);
58401572	147	}