[deliverable/linux.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>

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 {
	unsigned int bucket;
};

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

	for (st->bucket = 0;
	     st->bucket < nf_conntrack_htable_size;
	     st->bucket++) {
		n = rcu_dereference(nf_conntrack_hash[st->bucket].first);
		if (n)
			return n;
	}
	return NULL;
}

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

	head = rcu_dereference(head->next);
	while (head == NULL) {
		if (++st->bucket >= nf_conntrack_htable_size)
			return NULL;
		head = rcu_dereference(nf_conntrack_hash[st->bucket].first);
	}
	return head;
}

static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos)
{
	struct hlist_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)
{
	const struct nf_conntrack_tuple_hash *hash = v;
	const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
	const struct nf_conntrack_l3proto *l3proto;
	const struct nf_conntrack_l4proto *l4proto;

	NF_CT_ASSERT(ct);

	/* we only want to print DIR_ORIGINAL */
	if (NF_CT_DIRECTION(hash))
		return 0;

	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);

	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)
		return -ENOSPC;

	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
		return -ENOSPC;

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

	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
		return -ENOSPC;

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

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

	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
		return -ENOSPC;

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

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

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

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

	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_private(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_private,
};

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

	if (*pos == 0)
		return SEQ_START_TOKEN;

	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return &per_cpu(nf_conntrack_stat, cpu);
	}

	return NULL;
}

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

	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return &per_cpu(nf_conntrack_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)
{
	unsigned int nr_conntracks = atomic_read(&nf_conntrack_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(file, &ct_cpu_seq_ops);
}

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,
};

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

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

	pde = proc_create("nf_conntrack", S_IRUGO, init_net.proc_net_stat,
			  &ct_cpu_seq_fops);
	if (!pde)
		goto out_stat_nf_conntrack;
	return 0;

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

static void nf_conntrack_standalone_fini_proc(void)
{
	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
	proc_net_remove(&init_net, "nf_conntrack");
}
#else
static int nf_conntrack_standalone_init_proc(void)
{
	return 0;
}

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

/* Sysctl support */

int nf_conntrack_checksum __read_mostly = 1;
EXPORT_SYMBOL_GPL(nf_conntrack_checksum);

#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_sysctl_header;

static ctl_table nf_ct_sysctl_table[] = {
	{
		.ctl_name	= NET_NF_CONNTRACK_MAX,
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_COUNT,
		.procname	= "nf_conntrack_count",
		.data		= &nf_conntrack_count,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name       = NET_NF_CONNTRACK_BUCKETS,
		.procname       = "nf_conntrack_buckets",
		.data           = &nf_conntrack_htable_size,
		.maxlen         = sizeof(unsigned int),
		.mode           = 0444,
		.proc_handler   = &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_CHECKSUM,
		.procname	= "nf_conntrack_checksum",
		.data		= &nf_conntrack_checksum,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_LOG_INVALID,
		.procname	= "nf_conntrack_log_invalid",
		.data		= &nf_ct_log_invalid,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &log_invalid_proto_min,
		.extra2		= &log_invalid_proto_max,
	},
	{
		.ctl_name	= CTL_UNNUMBERED,
		.procname	= "nf_conntrack_expect_max",
		.data		= &nf_ct_expect_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{ .ctl_name = 0 }
};

#define NET_NF_CONNTRACK_MAX 2089

static ctl_table nf_ct_netfilter_table[] = {
	{
		.ctl_name	= NET_NETFILTER,
		.procname	= "netfilter",
		.mode		= 0555,
		.child		= nf_ct_sysctl_table,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_MAX,
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{ .ctl_name = 0 }
};

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

EXPORT_SYMBOL_GPL(nf_ct_log_invalid);

static int nf_conntrack_standalone_init_sysctl(void)
{
	nf_ct_sysctl_header =
		register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
	if (nf_ct_sysctl_header == NULL) {
		printk("nf_conntrack: can't register to sysctl.\n");
		return -ENOMEM;
	}
	return 0;

}

static void nf_conntrack_standalone_fini_sysctl(void)
{
	unregister_sysctl_table(nf_ct_sysctl_header);
}
#else
static int nf_conntrack_standalone_init_sysctl(void)
{
	return 0;
}

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

static int __init nf_conntrack_standalone_init(void)
{
	int ret;

	ret = nf_conntrack_init();
	if (ret < 0)
		goto out;
	ret = nf_conntrack_standalone_init_proc();
	if (ret < 0)
		goto out_proc;
	ret = nf_conntrack_standalone_init_sysctl();
	if (ret < 0)
		goto out_sysctl;
	return 0;

out_sysctl:
	nf_conntrack_standalone_fini_proc();
out_proc:
	nf_conntrack_cleanup();
out:
	return ret;
}

static void __exit nf_conntrack_standalone_fini(void)
{
	nf_conntrack_standalone_fini_sysctl();
	nf_conntrack_standalone_fini_proc();
	nf_conntrack_cleanup();
}

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>
9fb9cbb1	29
9fb9cbb1 YK	30	MODULE_LICENSE("GPL");
9fb9cbb1 YK	31
9fb9cbb1	32	#ifdef CONFIG_PROC_FS
77ab9cff	33	int
9fb9cbb1	34	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
32948588 JE	35	const struct nf_conntrack_l3proto *l3proto,
32948588 JE	36	const struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	37	{
605dcad6	38	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	39	}
e4bd8bce	40	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1	41
9fb9cbb1 YK	42	struct ct_iter_state {
	43	unsigned int bucket;
	44	};
	45
f205c5e0	46	static struct hlist_node ct_get_first(struct seq_file seq)
9fb9cbb1 YK	47	{
9fb9cbb1 YK	48	struct ct_iter_state *st = seq->private;
76507f69	49	struct hlist_node *n;
9fb9cbb1 YK	50
	51	for (st->bucket = 0;
	52	st->bucket < nf_conntrack_htable_size;
	53	st->bucket++) {
76507f69 PM	54	n = rcu_dereference(nf_conntrack_hash[st->bucket].first);
	55	if (n)
	56	return n;
9fb9cbb1 YK	57	}
	58	return NULL;
	59	}
	60
f205c5e0 PM	61	static struct hlist_node ct_get_next(struct seq_file seq,
f205c5e0 PM	62	struct hlist_node *head)
9fb9cbb1 YK	63	{
	64	struct ct_iter_state *st = seq->private;
	65
76507f69	66	head = rcu_dereference(head->next);
f205c5e0	67	while (head == NULL) {
9fb9cbb1 YK	68	if (++st->bucket >= nf_conntrack_htable_size)
9fb9cbb1 YK	69	return NULL;
76507f69	70	head = rcu_dereference(nf_conntrack_hash[st->bucket].first);
9fb9cbb1 YK	71	}
	72	return head;
	73	}
	74
f205c5e0	75	static struct hlist_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	76	{
f205c5e0	77	struct hlist_node *head = ct_get_first(seq);
9fb9cbb1 YK	78
	79	if (head)
	80	while (pos && (head = ct_get_next(seq, head)))
	81	pos--;
	82	return pos ? NULL : head;
	83	}
	84
	85	static void ct_seq_start(struct seq_file seq, loff_t *pos)
76507f69	86	__acquires(RCU)
9fb9cbb1	87	{
76507f69	88	rcu_read_lock();
9fb9cbb1 YK	89	return ct_get_idx(seq, *pos);
	90	}
	91
	92	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	93	{
	94	(*pos)++;
	95	return ct_get_next(s, v);
	96	}
	97
	98	static void ct_seq_stop(struct seq_file s, void v)
76507f69	99	__releases(RCU)
9fb9cbb1	100	{
76507f69	101	rcu_read_unlock();
9fb9cbb1 YK	102	}
	103
	104	/* return 0 on success, 1 in case of error */
	105	static int ct_seq_show(struct seq_file s, void v)
	106	{
	107	const struct nf_conntrack_tuple_hash *hash = v;
c88130bc	108	const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
32948588 JE	109	const struct nf_conntrack_l3proto *l3proto;
32948588 JE	110	const struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	111
c88130bc	112	NF_CT_ASSERT(ct);
9fb9cbb1 YK	113
	114	/* we only want to print DIR_ORIGINAL */
	115	if (NF_CT_DIRECTION(hash))
	116	return 0;
	117
5e8fbe2a	118	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
9fb9cbb1	119	NF_CT_ASSERT(l3proto);
5e8fbe2a	120	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
605dcad6	121	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	122
9fb9cbb1 YK	123	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
5e8fbe2a PM	124	l3proto->name, nf_ct_l3num(ct),
5e8fbe2a PM	125	l4proto->name, nf_ct_protonum(ct),
c88130bc PM	126	timer_pending(&ct->timeout)
c88130bc PM	127	? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
9fb9cbb1 YK	128	return -ENOSPC;
9fb9cbb1 YK	129
c88130bc	130	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
9fb9cbb1 YK	131	return -ENOSPC;
9fb9cbb1 YK	132
c88130bc	133	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	134	l3proto, l4proto))
9fb9cbb1 YK	135	return -ENOSPC;
9fb9cbb1 YK	136
58401572	137	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
9fb9cbb1 YK	138	return -ENOSPC;
9fb9cbb1 YK	139
c88130bc	140	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
9fb9cbb1 YK	141	if (seq_printf(s, "[UNREPLIED] "))
	142	return -ENOSPC;
	143
c88130bc	144	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	145	l3proto, l4proto))
9fb9cbb1 YK	146	return -ENOSPC;
9fb9cbb1 YK	147
58401572	148	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
9fb9cbb1 YK	149	return -ENOSPC;
9fb9cbb1 YK	150
c88130bc	151	if (test_bit(IPS_ASSURED_BIT, &ct->status))
9fb9cbb1 YK	152	if (seq_printf(s, "[ASSURED] "))
	153	return -ENOSPC;
	154
	155	#if defined(CONFIG_NF_CONNTRACK_MARK)
c88130bc	156	if (seq_printf(s, "mark=%u ", ct->mark))
9fb9cbb1 YK	157	return -ENOSPC;
	158	#endif
	159
7c9728c3	160	#ifdef CONFIG_NF_CONNTRACK_SECMARK
c88130bc	161	if (seq_printf(s, "secmark=%u ", ct->secmark))
7c9728c3 JM	162	return -ENOSPC;
	163	#endif
	164
c88130bc	165	if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
9fb9cbb1	166	return -ENOSPC;
a5d29264	167
9fb9cbb1 YK	168	return 0;
	169	}
	170
56b3d975	171	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	172	.start = ct_seq_start,
	173	.next = ct_seq_next,
	174	.stop = ct_seq_stop,
	175	.show = ct_seq_show
	176	};
	177
	178	static int ct_open(struct inode inode, struct file file)
	179	{
e2da5913 PE	180	return seq_open_private(file, &ct_seq_ops,
e2da5913 PE	181	sizeof(struct ct_iter_state));
9fb9cbb1 YK	182	}
9fb9cbb1 YK	183
da7071d7	184	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	185	.owner = THIS_MODULE,
	186	.open = ct_open,
	187	.read = seq_read,
	188	.llseek = seq_lseek,
	189	.release = seq_release_private,
	190	};
	191
9fb9cbb1 YK	192	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	193	{
	194	int cpu;
	195
	196	if (*pos == 0)
	197	return SEQ_START_TOKEN;
	198
	199	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	200	if (!cpu_possible(cpu))
	201	continue;
	202	*pos = cpu + 1;
	203	return &per_cpu(nf_conntrack_stat, cpu);
	204	}
	205
	206	return NULL;
	207	}
	208
	209	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	210	{
	211	int cpu;
	212
	213	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	214	if (!cpu_possible(cpu))
	215	continue;
	216	*pos = cpu + 1;
	217	return &per_cpu(nf_conntrack_stat, cpu);
	218	}
	219
	220	return NULL;
	221	}
	222
	223	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	224	{
	225	}
	226
	227	static int ct_cpu_seq_show(struct seq_file seq, void v)
	228	{
	229	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
32948588	230	const struct ip_conntrack_stat *st = v;
9fb9cbb1 YK	231
	232	if (v == SEQ_START_TOKEN) {
	233	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");
	234	return 0;
	235	}
	236
	237	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	238	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	239	nr_conntracks,
	240	st->searched,
	241	st->found,
	242	st->new,
	243	st->invalid,
	244	st->ignore,
	245	st->delete,
	246	st->delete_list,
	247	st->insert,
	248	st->insert_failed,
	249	st->drop,
	250	st->early_drop,
	251	st->error,
	252
	253	st->expect_new,
	254	st->expect_create,
	255	st->expect_delete
	256	);
	257	return 0;
	258	}
	259
56b3d975	260	static const struct seq_operations ct_cpu_seq_ops = {
9fb9cbb1 YK	261	.start = ct_cpu_seq_start,
	262	.next = ct_cpu_seq_next,
	263	.stop = ct_cpu_seq_stop,
	264	.show = ct_cpu_seq_show,
	265	};
	266
	267	static int ct_cpu_seq_open(struct inode inode, struct file file)
	268	{
	269	return seq_open(file, &ct_cpu_seq_ops);
	270	}
	271
da7071d7	272	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	273	.owner = THIS_MODULE,
	274	.open = ct_cpu_seq_open,
	275	.read = seq_read,
	276	.llseek = seq_lseek,
665bba10	277	.release = seq_release,
9fb9cbb1	278	};
b916f7d4 AD	279
	280	static int nf_conntrack_standalone_init_proc(void)
	281	{
	282	struct proc_dir_entry *pde;
	283
	284	pde = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
	285	if (!pde)
	286	goto out_nf_conntrack;
52c0e111 DL	287
	288	pde = proc_create("nf_conntrack", S_IRUGO, init_net.proc_net_stat,
	289	&ct_cpu_seq_fops);
b916f7d4 AD	290	if (!pde)
b916f7d4 AD	291	goto out_stat_nf_conntrack;
b916f7d4 AD	292	return 0;
	293
	294	out_stat_nf_conntrack:
	295	proc_net_remove(&init_net, "nf_conntrack");
	296	out_nf_conntrack:
	297	return -ENOMEM;
	298	}
	299
	300	static void nf_conntrack_standalone_fini_proc(void)
	301	{
	302	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
	303	proc_net_remove(&init_net, "nf_conntrack");
	304	}
	305	#else
	306	static int nf_conntrack_standalone_init_proc(void)
	307	{
	308	return 0;
	309	}
	310
	311	static void nf_conntrack_standalone_fini_proc(void)
	312	{
	313	}
9fb9cbb1 YK	314	#endif /* CONFIG_PROC_FS */
	315
	316	/* Sysctl support */
	317
94aec08e	318	int nf_conntrack_checksum __read_mostly = 1;
13b18339	319	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	320
9fb9cbb1	321	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	322	/* Log invalid packets of a given protocol */
	323	static int log_invalid_proto_min = 0;
	324	static int log_invalid_proto_max = 255;
	325
	326	static struct ctl_table_header *nf_ct_sysctl_header;
	327
	328	static ctl_table nf_ct_sysctl_table[] = {
	329	{
	330	.ctl_name = NET_NF_CONNTRACK_MAX,
	331	.procname = "nf_conntrack_max",
	332	.data = &nf_conntrack_max,
	333	.maxlen = sizeof(int),
	334	.mode = 0644,
	335	.proc_handler = &proc_dointvec,
	336	},
	337	{
	338	.ctl_name = NET_NF_CONNTRACK_COUNT,
	339	.procname = "nf_conntrack_count",
	340	.data = &nf_conntrack_count,
	341	.maxlen = sizeof(int),
	342	.mode = 0444,
	343	.proc_handler = &proc_dointvec,
	344	},
	345	{
	346	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	347	.procname = "nf_conntrack_buckets",
	348	.data = &nf_conntrack_htable_size,
	349	.maxlen = sizeof(unsigned int),
	350	.mode = 0444,
	351	.proc_handler = &proc_dointvec,
	352	},
39a27a35 PM	353	{
	354	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	355	.procname = "nf_conntrack_checksum",
	356	.data = &nf_conntrack_checksum,
	357	.maxlen = sizeof(unsigned int),
	358	.mode = 0644,
	359	.proc_handler = &proc_dointvec,
	360	},
9fb9cbb1 YK	361	{
	362	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	363	.procname = "nf_conntrack_log_invalid",
	364	.data = &nf_ct_log_invalid,
	365	.maxlen = sizeof(unsigned int),
	366	.mode = 0644,
	367	.proc_handler = &proc_dointvec_minmax,
	368	.strategy = &sysctl_intvec,
	369	.extra1 = &log_invalid_proto_min,
	370	.extra2 = &log_invalid_proto_max,
	371	},
f264a7df PM	372	{
	373	.ctl_name = CTL_UNNUMBERED,
	374	.procname = "nf_conntrack_expect_max",
	375	.data = &nf_ct_expect_max,
	376	.maxlen = sizeof(int),
	377	.mode = 0644,
	378	.proc_handler = &proc_dointvec,
	379	},
9fb9cbb1 YK	380	{ .ctl_name = 0 }
	381	};
	382
	383	#define NET_NF_CONNTRACK_MAX 2089
	384
	385	static ctl_table nf_ct_netfilter_table[] = {
	386	{
	387	.ctl_name = NET_NETFILTER,
	388	.procname = "netfilter",
	389	.mode = 0555,
	390	.child = nf_ct_sysctl_table,
	391	},
	392	{
	393	.ctl_name = NET_NF_CONNTRACK_MAX,
	394	.procname = "nf_conntrack_max",
	395	.data = &nf_conntrack_max,
	396	.maxlen = sizeof(int),
	397	.mode = 0644,
	398	.proc_handler = &proc_dointvec,
	399	},
	400	{ .ctl_name = 0 }
	401	};
	402
9e232495	403	static struct ctl_path nf_ct_path[] = {
3d7cc2ba PE	404	{ .procname = "net", .ctl_name = CTL_NET, },
3d7cc2ba PE	405	{ }
9fb9cbb1	406	};
3d7cc2ba	407
13b18339	408	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
b916f7d4 AD	409
	410	static int nf_conntrack_standalone_init_sysctl(void)
	411	{
	412	nf_ct_sysctl_header =
	413	register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
	414	if (nf_ct_sysctl_header == NULL) {
	415	printk("nf_conntrack: can't register to sysctl.\n");
	416	return -ENOMEM;
	417	}
	418	return 0;
	419
	420	}
	421
	422	static void nf_conntrack_standalone_fini_sysctl(void)
	423	{
	424	unregister_sysctl_table(nf_ct_sysctl_header);
	425	}
	426	#else
	427	static int nf_conntrack_standalone_init_sysctl(void)
	428	{
	429	return 0;
	430	}
	431
	432	static void nf_conntrack_standalone_fini_sysctl(void)
	433	{
	434	}
9fb9cbb1 YK	435	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	436
65b4b4e8	437	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	438	{
b916f7d4	439	int ret;
32292a7f PM	440
	441	ret = nf_conntrack_init();
	442	if (ret < 0)
b916f7d4 AD	443	goto out;
	444	ret = nf_conntrack_standalone_init_proc();
	445	if (ret < 0)
	446	goto out_proc;
	447	ret = nf_conntrack_standalone_init_sysctl();
	448	if (ret < 0)
	449	goto out_sysctl;
	450	return 0;
32292a7f	451
b916f7d4 AD	452	out_sysctl:
	453	nf_conntrack_standalone_fini_proc();
	454	out_proc:
32292a7f	455	nf_conntrack_cleanup();
b916f7d4	456	out:
32292a7f	457	return ret;
9fb9cbb1 YK	458	}
9fb9cbb1 YK	459
65b4b4e8	460	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	461	{
b916f7d4 AD	462	nf_conntrack_standalone_fini_sysctl();
b916f7d4 AD	463	nf_conntrack_standalone_fini_proc();
32292a7f	464	nf_conntrack_cleanup();
9fb9cbb1 YK	465	}
9fb9cbb1 YK	466
65b4b4e8 AM	467	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	468	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	469
	470	/* Some modules need us, but don't depend directly on any symbol.
	471	They should call this. */
2e4e6a17	472	void need_conntrack(void)
9fb9cbb1 YK	473	{
9fb9cbb1 YK	474	}
13b18339	475	EXPORT_SYMBOL_GPL(need_conntrack);