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

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * 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/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <net/netfilter/nf_conntrack_zones.h>

MODULE_LICENSE("GPL");

#ifdef CONFIG_PROC_FS
int
print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
            const struct nf_conntrack_l3proto *l3proto,
            const struct nf_conntrack_l4proto *l4proto)
{
	return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
}
EXPORT_SYMBOL_GPL(print_tuple);

struct ct_iter_state {
	struct seq_net_private p;
	unsigned int bucket;
};

static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
{
	struct net *net = seq_file_net(seq);
	struct ct_iter_state *st = seq->private;
	struct hlist_nulls_node *n;

	for (st->bucket = 0;
	     st->bucket < net->ct.htable_size;
	     st->bucket++) {
		n = rcu_dereference(net->ct.hash[st->bucket].first);
		if (!is_a_nulls(n))
			return n;
	}
	return NULL;
}

static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
				      struct hlist_nulls_node *head)
{
	struct net *net = seq_file_net(seq);
	struct ct_iter_state *st = seq->private;

	head = rcu_dereference(head->next);
	while (is_a_nulls(head)) {
		if (likely(get_nulls_value(head) == st->bucket)) {
			if (++st->bucket >= net->ct.htable_size)
				return NULL;
		}
		head = rcu_dereference(net->ct.hash[st->bucket].first);
	}
	return head;
}

static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
{
	struct hlist_nulls_node *head = ct_get_first(seq);

	if (head)
		while (pos && (head = ct_get_next(seq, head)))
			pos--;
	return pos ? NULL : head;
}

static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
	__acquires(RCU)
{
	rcu_read_lock();
	return ct_get_idx(seq, *pos);
}

static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
	(*pos)++;
	return ct_get_next(s, v);
}

static void ct_seq_stop(struct seq_file *s, void *v)
	__releases(RCU)
{
	rcu_read_unlock();
}

/* return 0 on success, 1 in case of error */
static int ct_seq_show(struct seq_file *s, void *v)
{
	struct nf_conntrack_tuple_hash *hash = v;
	struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
	const struct nf_conntrack_l3proto *l3proto;
	const struct nf_conntrack_l4proto *l4proto;
	int ret = 0;

	NF_CT_ASSERT(ct);
	if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
		return 0;

	/* we only want to print DIR_ORIGINAL */
	if (NF_CT_DIRECTION(hash))
		goto release;

	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
	NF_CT_ASSERT(l3proto);
	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
	NF_CT_ASSERT(l4proto);

	ret = -ENOSPC;
	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
		       l3proto->name, nf_ct_l3num(ct),
		       l4proto->name, nf_ct_protonum(ct),
		       timer_pending(&ct->timeout)
		       ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
		goto release;

	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
		goto release;

	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
			l3proto, l4proto))
		goto release;

	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
		goto release;

	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
		if (seq_printf(s, "[UNREPLIED] "))
			goto release;

	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
			l3proto, l4proto))
		goto release;

	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
		goto release;

	if (test_bit(IPS_ASSURED_BIT, &ct->status))
		if (seq_printf(s, "[ASSURED] "))
			goto release;

#if defined(CONFIG_NF_CONNTRACK_MARK)
	if (seq_printf(s, "mark=%u ", ct->mark))
		goto release;
#endif

#ifdef CONFIG_NF_CONNTRACK_SECMARK
	if (seq_printf(s, "secmark=%u ", ct->secmark))
		goto release;
#endif

#ifdef CONFIG_NF_CONNTRACK_ZONES
	if (seq_printf(s, "zone=%u ", nf_ct_zone(ct)))
		goto release;
#endif

	if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
		goto release;

	ret = 0;
release:
	nf_ct_put(ct);
	return 0;
}

static const struct seq_operations ct_seq_ops = {
	.start = ct_seq_start,
	.next  = ct_seq_next,
	.stop  = ct_seq_stop,
	.show  = ct_seq_show
};

static int ct_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &ct_seq_ops,
			sizeof(struct ct_iter_state));
}

static const struct file_operations ct_file_ops = {
	.owner   = THIS_MODULE,
	.open    = ct_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_net,
};

static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
{
	struct net *net = seq_file_net(seq);
	int cpu;

	if (*pos == 0)
		return SEQ_START_TOKEN;

	for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return per_cpu_ptr(net->ct.stat, cpu);
	}

	return NULL;
}

static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	struct net *net = seq_file_net(seq);
	int cpu;

	for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return per_cpu_ptr(net->ct.stat, cpu);
	}

	return NULL;
}

static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
{
}

static int ct_cpu_seq_show(struct seq_file *seq, void *v)
{
	struct net *net = seq_file_net(seq);
	unsigned int nr_conntracks = atomic_read(&net->ct.count);
	const struct ip_conntrack_stat *st = v;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, "entries  searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete\n");
		return 0;
	}

	seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
			"%08x %08x %08x %08x %08x  %08x %08x %08x \n",
		   nr_conntracks,
		   st->searched,
		   st->found,
		   st->new,
		   st->invalid,
		   st->ignore,
		   st->delete,
		   st->delete_list,
		   st->insert,
		   st->insert_failed,
		   st->drop,
		   st->early_drop,
		   st->error,

		   st->expect_new,
		   st->expect_create,
		   st->expect_delete
		);
	return 0;
}

static const struct seq_operations ct_cpu_seq_ops = {
	.start	= ct_cpu_seq_start,
	.next	= ct_cpu_seq_next,
	.stop	= ct_cpu_seq_stop,
	.show	= ct_cpu_seq_show,
};

static int ct_cpu_seq_open(struct inode *inode, struct file *file)
{
	return seq_open_net(inode, file, &ct_cpu_seq_ops,
			    sizeof(struct seq_net_private));
}

static const struct file_operations ct_cpu_seq_fops = {
	.owner	 = THIS_MODULE,
	.open	 = ct_cpu_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release_net,
};

static int nf_conntrack_standalone_init_proc(struct net *net)
{
	struct proc_dir_entry *pde;

	pde = proc_net_fops_create(net, "nf_conntrack", 0440, &ct_file_ops);
	if (!pde)
		goto out_nf_conntrack;

	pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat,
			  &ct_cpu_seq_fops);
	if (!pde)
		goto out_stat_nf_conntrack;
	return 0;

out_stat_nf_conntrack:
	proc_net_remove(net, "nf_conntrack");
out_nf_conntrack:
	return -ENOMEM;
}

static void nf_conntrack_standalone_fini_proc(struct net *net)
{
	remove_proc_entry("nf_conntrack", net->proc_net_stat);
	proc_net_remove(net, "nf_conntrack");
}
#else
static int nf_conntrack_standalone_init_proc(struct net *net)
{
	return 0;
}

static void nf_conntrack_standalone_fini_proc(struct net *net)
{
}
#endif /* CONFIG_PROC_FS */

/* Sysctl support */

#ifdef CONFIG_SYSCTL
/* Log invalid packets of a given protocol */
static int log_invalid_proto_min = 0;
static int log_invalid_proto_max = 255;

static struct ctl_table_header *nf_ct_netfilter_header;

static ctl_table nf_ct_sysctl_table[] = {
	{
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "nf_conntrack_count",
		.data		= &init_net.ct.count,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname       = "nf_conntrack_buckets",
		.data           = &init_net.ct.htable_size,
		.maxlen         = sizeof(unsigned int),
		.mode           = 0444,
		.proc_handler   = proc_dointvec,
	},
	{
		.procname	= "nf_conntrack_checksum",
		.data		= &init_net.ct.sysctl_checksum,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "nf_conntrack_log_invalid",
		.data		= &init_net.ct.sysctl_log_invalid,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &log_invalid_proto_min,
		.extra2		= &log_invalid_proto_max,
	},
	{
		.procname	= "nf_conntrack_expect_max",
		.data		= &nf_ct_expect_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{ }
};

#define NET_NF_CONNTRACK_MAX 2089

static ctl_table nf_ct_netfilter_table[] = {
	{
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{ }
};

static struct ctl_path nf_ct_path[] = {
	{ .procname = "net", },
	{ }
};

static int nf_conntrack_standalone_init_sysctl(struct net *net)
{
	struct ctl_table *table;

	if (net_eq(net, &init_net)) {
		nf_ct_netfilter_header =
		       register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
		if (!nf_ct_netfilter_header)
			goto out;
	}

	table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
			GFP_KERNEL);
	if (!table)
		goto out_kmemdup;

	table[1].data = &net->ct.count;
	table[2].data = &net->ct.htable_size;
	table[3].data = &net->ct.sysctl_checksum;
	table[4].data = &net->ct.sysctl_log_invalid;

	net->ct.sysctl_header = register_net_sysctl_table(net,
					nf_net_netfilter_sysctl_path, table);
	if (!net->ct.sysctl_header)
		goto out_unregister_netfilter;

	return 0;

out_unregister_netfilter:
	kfree(table);
out_kmemdup:
	if (net_eq(net, &init_net))
		unregister_sysctl_table(nf_ct_netfilter_header);
out:
	printk("nf_conntrack: can't register to sysctl.\n");
	return -ENOMEM;
}

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

	if (net_eq(net, &init_net))
		unregister_sysctl_table(nf_ct_netfilter_header);
	table = net->ct.sysctl_header->ctl_table_arg;
	unregister_net_sysctl_table(net->ct.sysctl_header);
	kfree(table);
}
#else
static int nf_conntrack_standalone_init_sysctl(struct net *net)
{
	return 0;
}

static void nf_conntrack_standalone_fini_sysctl(struct net *net)
{
}
#endif /* CONFIG_SYSCTL */

static int nf_conntrack_net_init(struct net *net)
{
	int ret;

	ret = nf_conntrack_init(net);
	if (ret < 0)
		goto out_init;
	ret = nf_conntrack_standalone_init_proc(net);
	if (ret < 0)
		goto out_proc;
	net->ct.sysctl_checksum = 1;
	net->ct.sysctl_log_invalid = 0;
	ret = nf_conntrack_standalone_init_sysctl(net);
	if (ret < 0)
		goto out_sysctl;
	return 0;

out_sysctl:
	nf_conntrack_standalone_fini_proc(net);
out_proc:
	nf_conntrack_cleanup(net);
out_init:
	return ret;
}

static void nf_conntrack_net_exit(struct net *net)
{
	nf_conntrack_standalone_fini_sysctl(net);
	nf_conntrack_standalone_fini_proc(net);
	nf_conntrack_cleanup(net);
}

static struct pernet_operations nf_conntrack_net_ops = {
	.init = nf_conntrack_net_init,
	.exit = nf_conntrack_net_exit,
};

static int __init nf_conntrack_standalone_init(void)
{
	return register_pernet_subsys(&nf_conntrack_net_ops);
}

static void __exit nf_conntrack_standalone_fini(void)
{
	unregister_pernet_subsys(&nf_conntrack_net_ops);
}

module_init(nf_conntrack_standalone_init);
module_exit(nf_conntrack_standalone_fini);

/* Some modules need us, but don't depend directly on any symbol.
   They should call this. */
void need_conntrack(void)
{
}
EXPORT_SYMBOL_GPL(need_conntrack);
Commit	Line	Data
9fb9cbb1 YK	1	/* (C) 1999-2001 Paul `Rusty' Russell
	2	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
9fb9cbb1 YK	7	*/
9fb9cbb1 YK	8
9fb9cbb1 YK	9	#include <linux/types.h>
	10	#include <linux/netfilter.h>
	11	#include <linux/module.h>
	12	#include <linux/skbuff.h>
	13	#include <linux/proc_fs.h>
	14	#include <linux/seq_file.h>
	15	#include <linux/percpu.h>
	16	#include <linux/netdevice.h>
457c4cbc	17	#include <net/net_namespace.h>
9fb9cbb1 YK	18	#ifdef CONFIG_SYSCTL
	19	#include <linux/sysctl.h>
	20	#endif
	21
9fb9cbb1	22	#include <net/netfilter/nf_conntrack.h>
f6180121	23	#include <net/netfilter/nf_conntrack_core.h>
9fb9cbb1	24	#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6	25	#include <net/netfilter/nf_conntrack_l4proto.h>
77ab9cff	26	#include <net/netfilter/nf_conntrack_expect.h>
9fb9cbb1	27	#include <net/netfilter/nf_conntrack_helper.h>
58401572	28	#include <net/netfilter/nf_conntrack_acct.h>
5d0aa2cc	29	#include <net/netfilter/nf_conntrack_zones.h>
9fb9cbb1	30
9fb9cbb1 YK	31	MODULE_LICENSE("GPL");
9fb9cbb1 YK	32
9fb9cbb1	33	#ifdef CONFIG_PROC_FS
77ab9cff	34	int
9fb9cbb1	35	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
32948588 JE	36	const struct nf_conntrack_l3proto *l3proto,
32948588 JE	37	const struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	38	{
605dcad6	39	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	40	}
e4bd8bce	41	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1	42
9fb9cbb1	43	struct ct_iter_state {
b2ce2c74	44	struct seq_net_private p;
9fb9cbb1 YK	45	unsigned int bucket;
	46	};
	47
ea781f19	48	static struct hlist_nulls_node ct_get_first(struct seq_file seq)
9fb9cbb1	49	{
b2ce2c74	50	struct net *net = seq_file_net(seq);
9fb9cbb1	51	struct ct_iter_state *st = seq->private;
ea781f19	52	struct hlist_nulls_node *n;
9fb9cbb1 YK	53
9fb9cbb1 YK	54	for (st->bucket = 0;
d696c7bd	55	st->bucket < net->ct.htable_size;
9fb9cbb1	56	st->bucket++) {
b2ce2c74	57	n = rcu_dereference(net->ct.hash[st->bucket].first);
ea781f19	58	if (!is_a_nulls(n))
76507f69	59	return n;
9fb9cbb1 YK	60	}
	61	return NULL;
	62	}
	63
ea781f19 ED	64	static struct hlist_nulls_node ct_get_next(struct seq_file seq,
ea781f19 ED	65	struct hlist_nulls_node *head)
9fb9cbb1	66	{
b2ce2c74	67	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	68	struct ct_iter_state *st = seq->private;
9fb9cbb1 YK	69
76507f69	70	head = rcu_dereference(head->next);
ea781f19 ED	71	while (is_a_nulls(head)) {
ea781f19 ED	72	if (likely(get_nulls_value(head) == st->bucket)) {
d696c7bd	73	if (++st->bucket >= net->ct.htable_size)
ea781f19 ED	74	return NULL;
ea781f19 ED	75	}
b2ce2c74	76	head = rcu_dereference(net->ct.hash[st->bucket].first);
9fb9cbb1 YK	77	}
	78	return head;
	79	}
	80
ea781f19	81	static struct hlist_nulls_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	82	{
ea781f19	83	struct hlist_nulls_node *head = ct_get_first(seq);
9fb9cbb1 YK	84
	85	if (head)
	86	while (pos && (head = ct_get_next(seq, head)))
	87	pos--;
	88	return pos ? NULL : head;
	89	}
	90
	91	static void ct_seq_start(struct seq_file seq, loff_t *pos)
76507f69	92	__acquires(RCU)
9fb9cbb1	93	{
76507f69	94	rcu_read_lock();
9fb9cbb1 YK	95	return ct_get_idx(seq, *pos);
	96	}
	97
	98	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	99	{
	100	(*pos)++;
	101	return ct_get_next(s, v);
	102	}
	103
	104	static void ct_seq_stop(struct seq_file s, void v)
76507f69	105	__releases(RCU)
9fb9cbb1	106	{
76507f69	107	rcu_read_unlock();
9fb9cbb1 YK	108	}
	109
	110	/* return 0 on success, 1 in case of error */
	111	static int ct_seq_show(struct seq_file s, void v)
	112	{
ea781f19 ED	113	struct nf_conntrack_tuple_hash *hash = v;
ea781f19 ED	114	struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
32948588 JE	115	const struct nf_conntrack_l3proto *l3proto;
32948588 JE	116	const struct nf_conntrack_l4proto *l4proto;
ea781f19	117	int ret = 0;
9fb9cbb1	118
c88130bc	119	NF_CT_ASSERT(ct);
ea781f19 ED	120	if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
ea781f19 ED	121	return 0;
9fb9cbb1 YK	122
	123	/* we only want to print DIR_ORIGINAL */
	124	if (NF_CT_DIRECTION(hash))
ea781f19	125	goto release;
9fb9cbb1	126
5e8fbe2a	127	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
9fb9cbb1	128	NF_CT_ASSERT(l3proto);
5e8fbe2a	129	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
605dcad6	130	NF_CT_ASSERT(l4proto);
9fb9cbb1	131
ea781f19	132	ret = -ENOSPC;
9fb9cbb1	133	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
5e8fbe2a PM	134	l3proto->name, nf_ct_l3num(ct),
5e8fbe2a PM	135	l4proto->name, nf_ct_protonum(ct),
c88130bc PM	136	timer_pending(&ct->timeout)
c88130bc PM	137	? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
ea781f19	138	goto release;
9fb9cbb1	139
c88130bc	140	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
ea781f19	141	goto release;
9fb9cbb1	142
c88130bc	143	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	144	l3proto, l4proto))
ea781f19	145	goto release;
9fb9cbb1	146
58401572	147	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
ea781f19	148	goto release;
9fb9cbb1	149
c88130bc	150	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
9fb9cbb1	151	if (seq_printf(s, "[UNREPLIED] "))
ea781f19	152	goto release;
9fb9cbb1	153
c88130bc	154	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	155	l3proto, l4proto))
ea781f19	156	goto release;
9fb9cbb1	157
58401572	158	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
ea781f19	159	goto release;
9fb9cbb1	160
c88130bc	161	if (test_bit(IPS_ASSURED_BIT, &ct->status))
9fb9cbb1	162	if (seq_printf(s, "[ASSURED] "))
ea781f19	163	goto release;
9fb9cbb1 YK	164
9fb9cbb1 YK	165	#if defined(CONFIG_NF_CONNTRACK_MARK)
c88130bc	166	if (seq_printf(s, "mark=%u ", ct->mark))
ea781f19	167	goto release;
9fb9cbb1 YK	168	#endif
9fb9cbb1 YK	169
7c9728c3	170	#ifdef CONFIG_NF_CONNTRACK_SECMARK
c88130bc	171	if (seq_printf(s, "secmark=%u ", ct->secmark))
ea781f19	172	goto release;
7c9728c3 JM	173	#endif
7c9728c3 JM	174
5d0aa2cc PM	175	#ifdef CONFIG_NF_CONNTRACK_ZONES
	176	if (seq_printf(s, "zone=%u ", nf_ct_zone(ct)))
	177	goto release;
	178	#endif
	179
c88130bc	180	if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
ea781f19	181	goto release;
a5d29264	182
ea781f19 ED	183	ret = 0;
	184	release:
	185	nf_ct_put(ct);
9fb9cbb1 YK	186	return 0;
	187	}
	188
56b3d975	189	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	190	.start = ct_seq_start,
	191	.next = ct_seq_next,
	192	.stop = ct_seq_stop,
	193	.show = ct_seq_show
	194	};
	195
	196	static int ct_open(struct inode inode, struct file file)
	197	{
b2ce2c74	198	return seq_open_net(inode, file, &ct_seq_ops,
e2da5913	199	sizeof(struct ct_iter_state));
9fb9cbb1 YK	200	}
9fb9cbb1 YK	201
da7071d7	202	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	203	.owner = THIS_MODULE,
	204	.open = ct_open,
	205	.read = seq_read,
	206	.llseek = seq_lseek,
b2ce2c74	207	.release = seq_release_net,
9fb9cbb1 YK	208	};
9fb9cbb1 YK	209
9fb9cbb1 YK	210	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
9fb9cbb1 YK	211	{
8e9df801	212	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	213	int cpu;
	214
	215	if (*pos == 0)
	216	return SEQ_START_TOKEN;
	217
0f23174a	218	for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
9fb9cbb1 YK	219	if (!cpu_possible(cpu))
	220	continue;
	221	*pos = cpu + 1;
8e9df801	222	return per_cpu_ptr(net->ct.stat, cpu);
9fb9cbb1 YK	223	}
	224
	225	return NULL;
	226	}
	227
	228	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	229	{
8e9df801	230	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	231	int cpu;
9fb9cbb1 YK	232
0f23174a	233	for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
9fb9cbb1 YK	234	if (!cpu_possible(cpu))
	235	continue;
	236	*pos = cpu + 1;
8e9df801	237	return per_cpu_ptr(net->ct.stat, cpu);
9fb9cbb1 YK	238	}
	239
	240	return NULL;
	241	}
	242
	243	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	244	{
	245	}
	246
	247	static int ct_cpu_seq_show(struct seq_file seq, void v)
	248	{
8e9df801 AD	249	struct net *net = seq_file_net(seq);
8e9df801 AD	250	unsigned int nr_conntracks = atomic_read(&net->ct.count);
32948588	251	const struct ip_conntrack_stat *st = v;
9fb9cbb1 YK	252
	253	if (v == SEQ_START_TOKEN) {
	254	seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete\n");
	255	return 0;
	256	}
	257
	258	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	259	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	260	nr_conntracks,
	261	st->searched,
	262	st->found,
	263	st->new,
	264	st->invalid,
	265	st->ignore,
	266	st->delete,
	267	st->delete_list,
	268	st->insert,
	269	st->insert_failed,
	270	st->drop,
	271	st->early_drop,
	272	st->error,
	273
	274	st->expect_new,
	275	st->expect_create,
	276	st->expect_delete
	277	);
	278	return 0;
	279	}
	280
56b3d975	281	static const struct seq_operations ct_cpu_seq_ops = {
9fb9cbb1 YK	282	.start = ct_cpu_seq_start,
	283	.next = ct_cpu_seq_next,
	284	.stop = ct_cpu_seq_stop,
	285	.show = ct_cpu_seq_show,
	286	};
	287
	288	static int ct_cpu_seq_open(struct inode inode, struct file file)
	289	{
8e9df801 AD	290	return seq_open_net(inode, file, &ct_cpu_seq_ops,
8e9df801 AD	291	sizeof(struct seq_net_private));
9fb9cbb1 YK	292	}
9fb9cbb1 YK	293
da7071d7	294	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	295	.owner = THIS_MODULE,
	296	.open = ct_cpu_seq_open,
	297	.read = seq_read,
	298	.llseek = seq_lseek,
8e9df801	299	.release = seq_release_net,
9fb9cbb1	300	};
b916f7d4	301
b2ce2c74	302	static int nf_conntrack_standalone_init_proc(struct net *net)
b916f7d4 AD	303	{
	304	struct proc_dir_entry *pde;
	305
b2ce2c74	306	pde = proc_net_fops_create(net, "nf_conntrack", 0440, &ct_file_ops);
b916f7d4 AD	307	if (!pde)
b916f7d4 AD	308	goto out_nf_conntrack;
52c0e111	309
b2ce2c74	310	pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat,
52c0e111	311	&ct_cpu_seq_fops);
b916f7d4 AD	312	if (!pde)
b916f7d4 AD	313	goto out_stat_nf_conntrack;
b916f7d4 AD	314	return 0;
	315
	316	out_stat_nf_conntrack:
b2ce2c74	317	proc_net_remove(net, "nf_conntrack");
b916f7d4 AD	318	out_nf_conntrack:
	319	return -ENOMEM;
	320	}
	321
b2ce2c74	322	static void nf_conntrack_standalone_fini_proc(struct net *net)
b916f7d4	323	{
b2ce2c74 AD	324	remove_proc_entry("nf_conntrack", net->proc_net_stat);
b2ce2c74 AD	325	proc_net_remove(net, "nf_conntrack");
b916f7d4 AD	326	}
b916f7d4 AD	327	#else
b2ce2c74	328	static int nf_conntrack_standalone_init_proc(struct net *net)
b916f7d4 AD	329	{
	330	return 0;
	331	}
	332
b2ce2c74	333	static void nf_conntrack_standalone_fini_proc(struct net *net)
b916f7d4 AD	334	{
b916f7d4 AD	335	}
9fb9cbb1 YK	336	#endif /* CONFIG_PROC_FS */
	337
	338	/* Sysctl support */
	339
	340	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	341	/* Log invalid packets of a given protocol */
	342	static int log_invalid_proto_min = 0;
	343	static int log_invalid_proto_max = 255;
	344
9714be7d	345	static struct ctl_table_header *nf_ct_netfilter_header;
9fb9cbb1 YK	346
	347	static ctl_table nf_ct_sysctl_table[] = {
	348	{
9fb9cbb1 YK	349	.procname = "nf_conntrack_max",
	350	.data = &nf_conntrack_max,
	351	.maxlen = sizeof(int),
	352	.mode = 0644,
6d9f239a	353	.proc_handler = proc_dointvec,
9fb9cbb1 YK	354	},
9fb9cbb1 YK	355	{
9fb9cbb1	356	.procname = "nf_conntrack_count",
49ac8713	357	.data = &init_net.ct.count,
9fb9cbb1 YK	358	.maxlen = sizeof(int),
9fb9cbb1 YK	359	.mode = 0444,
6d9f239a	360	.proc_handler = proc_dointvec,
9fb9cbb1 YK	361	},
9fb9cbb1 YK	362	{
9fb9cbb1	363	.procname = "nf_conntrack_buckets",
d696c7bd	364	.data = &init_net.ct.htable_size,
9fb9cbb1 YK	365	.maxlen = sizeof(unsigned int),
9fb9cbb1 YK	366	.mode = 0444,
6d9f239a	367	.proc_handler = proc_dointvec,
9fb9cbb1	368	},
39a27a35	369	{
39a27a35	370	.procname = "nf_conntrack_checksum",
c04d0552	371	.data = &init_net.ct.sysctl_checksum,
39a27a35 PM	372	.maxlen = sizeof(unsigned int),
39a27a35 PM	373	.mode = 0644,
6d9f239a	374	.proc_handler = proc_dointvec,
39a27a35	375	},
9fb9cbb1	376	{
9fb9cbb1	377	.procname = "nf_conntrack_log_invalid",
c2a2c7e0	378	.data = &init_net.ct.sysctl_log_invalid,
9fb9cbb1 YK	379	.maxlen = sizeof(unsigned int),
9fb9cbb1 YK	380	.mode = 0644,
6d9f239a	381	.proc_handler = proc_dointvec_minmax,
9fb9cbb1 YK	382	.extra1 = &log_invalid_proto_min,
	383	.extra2 = &log_invalid_proto_max,
	384	},
f264a7df	385	{
f264a7df PM	386	.procname = "nf_conntrack_expect_max",
	387	.data = &nf_ct_expect_max,
	388	.maxlen = sizeof(int),
	389	.mode = 0644,
6d9f239a	390	.proc_handler = proc_dointvec,
f264a7df	391	},
f8572d8f	392	{ }
9fb9cbb1 YK	393	};
	394
	395	#define NET_NF_CONNTRACK_MAX 2089
	396
	397	static ctl_table nf_ct_netfilter_table[] = {
9fb9cbb1	398	{
9fb9cbb1 YK	399	.procname = "nf_conntrack_max",
	400	.data = &nf_conntrack_max,
	401	.maxlen = sizeof(int),
	402	.mode = 0644,
6d9f239a	403	.proc_handler = proc_dointvec,
9fb9cbb1	404	},
f8572d8f	405	{ }
9fb9cbb1 YK	406	};
9fb9cbb1 YK	407
9e232495	408	static struct ctl_path nf_ct_path[] = {
f8572d8f	409	{ .procname = "net", },
3d7cc2ba	410	{ }
9fb9cbb1	411	};
3d7cc2ba	412
80250707	413	static int nf_conntrack_standalone_init_sysctl(struct net *net)
b916f7d4	414	{
80250707 AD	415	struct ctl_table *table;
	416
	417	if (net_eq(net, &init_net)) {
	418	nf_ct_netfilter_header =
	419	register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
	420	if (!nf_ct_netfilter_header)
	421	goto out;
	422	}
	423
	424	table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
	425	GFP_KERNEL);
	426	if (!table)
	427	goto out_kmemdup;
	428
	429	table[1].data = &net->ct.count;
d696c7bd	430	table[2].data = &net->ct.htable_size;
c04d0552	431	table[3].data = &net->ct.sysctl_checksum;
c2a2c7e0	432	table[4].data = &net->ct.sysctl_log_invalid;
80250707 AD	433
	434	net->ct.sysctl_header = register_net_sysctl_table(net,
	435	nf_net_netfilter_sysctl_path, table);
	436	if (!net->ct.sysctl_header)
9714be7d KPO	437	goto out_unregister_netfilter;
9714be7d KPO	438
b916f7d4 AD	439	return 0;
b916f7d4 AD	440
9714be7d	441	out_unregister_netfilter:
80250707 AD	442	kfree(table);
	443	out_kmemdup:
	444	if (net_eq(net, &init_net))
	445	unregister_sysctl_table(nf_ct_netfilter_header);
9714be7d KPO	446	out:
	447	printk("nf_conntrack: can't register to sysctl.\n");
	448	return -ENOMEM;
b916f7d4 AD	449	}
b916f7d4 AD	450
80250707	451	static void nf_conntrack_standalone_fini_sysctl(struct net *net)
b916f7d4	452	{
80250707 AD	453	struct ctl_table *table;
	454
	455	if (net_eq(net, &init_net))
	456	unregister_sysctl_table(nf_ct_netfilter_header);
	457	table = net->ct.sysctl_header->ctl_table_arg;
	458	unregister_net_sysctl_table(net->ct.sysctl_header);
	459	kfree(table);
b916f7d4 AD	460	}
b916f7d4 AD	461	#else
80250707	462	static int nf_conntrack_standalone_init_sysctl(struct net *net)
b916f7d4 AD	463	{
	464	return 0;
	465	}
	466
80250707	467	static void nf_conntrack_standalone_fini_sysctl(struct net *net)
b916f7d4 AD	468	{
b916f7d4 AD	469	}
9fb9cbb1 YK	470	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	471
dfdb8d79 AD	472	static int nf_conntrack_net_init(struct net *net)
dfdb8d79 AD	473	{
b2ce2c74 AD	474	int ret;
	475
	476	ret = nf_conntrack_init(net);
	477	if (ret < 0)
	478	goto out_init;
	479	ret = nf_conntrack_standalone_init_proc(net);
	480	if (ret < 0)
	481	goto out_proc;
c04d0552	482	net->ct.sysctl_checksum = 1;
c2a2c7e0	483	net->ct.sysctl_log_invalid = 0;
80250707 AD	484	ret = nf_conntrack_standalone_init_sysctl(net);
	485	if (ret < 0)
	486	goto out_sysctl;
b2ce2c74 AD	487	return 0;
b2ce2c74 AD	488
80250707 AD	489	out_sysctl:
80250707 AD	490	nf_conntrack_standalone_fini_proc(net);
b2ce2c74 AD	491	out_proc:
	492	nf_conntrack_cleanup(net);
	493	out_init:
	494	return ret;
dfdb8d79 AD	495	}
	496
	497	static void nf_conntrack_net_exit(struct net *net)
	498	{
80250707	499	nf_conntrack_standalone_fini_sysctl(net);
b2ce2c74	500	nf_conntrack_standalone_fini_proc(net);
dfdb8d79 AD	501	nf_conntrack_cleanup(net);
	502	}
	503
	504	static struct pernet_operations nf_conntrack_net_ops = {
	505	.init = nf_conntrack_net_init,
	506	.exit = nf_conntrack_net_exit,
	507	};
	508
65b4b4e8	509	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	510	{
80250707	511	return register_pernet_subsys(&nf_conntrack_net_ops);
9fb9cbb1 YK	512	}
9fb9cbb1 YK	513
65b4b4e8	514	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	515	{
dfdb8d79	516	unregister_pernet_subsys(&nf_conntrack_net_ops);
9fb9cbb1 YK	517	}
9fb9cbb1 YK	518
65b4b4e8 AM	519	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	520	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	521
	522	/* Some modules need us, but don't depend directly on any symbol.
	523	They should call this. */
2e4e6a17	524	void need_conntrack(void)
9fb9cbb1 YK	525	{
9fb9cbb1 YK	526	}
13b18339	527	EXPORT_SYMBOL_GPL(need_conntrack);