[deliverable/linux.git] / net / netfilter / nf_conntrack_standalone.c

/* This file contains all the functions required for the standalone
   nf_conntrack module.

   These are not required by the compatibility layer.
*/

/* (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.
 *
 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
 *	- generalize L3 protocol dependent part.
 *
 * Derived from net/ipv4/netfilter/ip_conntrack_standalone.c
 */

#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>
#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>

#if 0
#define DEBUGP printk
#else
#define DEBUGP(format, args...)
#endif

MODULE_LICENSE("GPL");

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

#ifdef CONFIG_NF_CT_ACCT
static unsigned int
seq_print_counters(struct seq_file *s,
		   const struct ip_conntrack_counter *counter)
{
	return seq_printf(s, "packets=%llu bytes=%llu ",
			  (unsigned long long)counter->packets,
			  (unsigned long long)counter->bytes);
}
#else
#define seq_print_counters(x, y)	0
#endif

struct ct_iter_state {
	unsigned int bucket;
};

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

	for (st->bucket = 0;
	     st->bucket < nf_conntrack_htable_size;
	     st->bucket++) {
		if (!list_empty(&nf_conntrack_hash[st->bucket]))
			return nf_conntrack_hash[st->bucket].next;
	}
	return NULL;
}

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

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

static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
{
	struct list_head *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)
{
	read_lock_bh(&nf_conntrack_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)
{
	read_unlock_bh(&nf_conntrack_lock);
}

/* 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 *conntrack = nf_ct_tuplehash_to_ctrack(hash);
	struct nf_conntrack_l3proto *l3proto;
	struct nf_conntrack_l4proto *l4proto;

	NF_CT_ASSERT(conntrack);

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

	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				       .tuple.src.l3num);

	NF_CT_ASSERT(l3proto);
	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				   .tuple.src.l3num,
				   conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				   .tuple.dst.protonum);
	NF_CT_ASSERT(l4proto);

	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
		       l3proto->name,
		       conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
		       l4proto->name,
		       conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
		       timer_pending(&conntrack->timeout)
		       ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
		return -ENOSPC;

	if (l3proto->print_conntrack(s, conntrack))
		return -ENOSPC;

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

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

	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
		return -ENOSPC;

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

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

	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
		return -ENOSPC;

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

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

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

	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
		return -ENOSPC;
	
	return 0;
}

static 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)
{
	struct seq_file *seq;
	struct ct_iter_state *st;
	int ret;

	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	if (st == NULL)
		return -ENOMEM;
	ret = seq_open(file, &ct_seq_ops);
	if (ret)
		goto out_free;
	seq          = file->private_data;
	seq->private = st;
	memset(st, 0, sizeof(struct ct_iter_state));
	return ret;
out_free:
	kfree(st);
	return ret;
}

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);
	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 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_private,
};
#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 = 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 ctl_table nf_ct_net_table[] = {
	{
		.ctl_name	= CTL_NET,
		.procname	= "net",
		.mode		= 0555,
		.child		= nf_ct_netfilter_table,
	},
	{ .ctl_name = 0 }
};
EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
#endif /* CONFIG_SYSCTL */

static int __init nf_conntrack_standalone_init(void)
{
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *proc, *proc_exp, *proc_stat;
#endif
	int ret = 0;

	ret = nf_conntrack_init();
	if (ret < 0)
		return ret;

#ifdef CONFIG_PROC_FS
	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	if (!proc) goto cleanup_init;

	proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440,
					&exp_file_ops);
	if (!proc_exp) goto cleanup_proc;

	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
	if (!proc_stat)
		goto cleanup_proc_exp;

	proc_stat->proc_fops = &ct_cpu_seq_fops;
	proc_stat->owner = THIS_MODULE;
#endif
#ifdef CONFIG_SYSCTL
	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
	if (nf_ct_sysctl_header == NULL) {
		printk("nf_conntrack: can't register to sysctl.\n");
		ret = -ENOMEM;
		goto cleanup_proc_stat;
	}
#endif
	return ret;

#ifdef CONFIG_SYSCTL
 cleanup_proc_stat:
#endif
#ifdef CONFIG_PROC_FS
	remove_proc_entry("nf_conntrack", proc_net_stat);
 cleanup_proc_exp:
	proc_net_remove("nf_conntrack_expect");
 cleanup_proc:
	proc_net_remove("nf_conntrack");
 cleanup_init:
#endif /* CNFIG_PROC_FS */
	nf_conntrack_cleanup();
	return ret;
}

static void __exit nf_conntrack_standalone_fini(void)
{
#ifdef CONFIG_SYSCTL
 	unregister_sysctl_table(nf_ct_sysctl_header);
#endif
#ifdef CONFIG_PROC_FS
	remove_proc_entry("nf_conntrack", proc_net_stat);
	proc_net_remove("nf_conntrack_expect");
	proc_net_remove("nf_conntrack");
#endif /* CNFIG_PROC_FS */
	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	/* This file contains all the functions required for the standalone
	2	nf_conntrack module.
	3
	4	These are not required by the compatibility layer.
	5	*/
	6
	7	/* (C) 1999-2001 Paul `Rusty' Russell
	8	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
	15	* - generalize L3 protocol dependent part.
	16	*
	17	* Derived from net/ipv4/netfilter/ip_conntrack_standalone.c
	18	*/
	19
9fb9cbb1 YK	20	#include <linux/types.h>
	21	#include <linux/netfilter.h>
	22	#include <linux/module.h>
	23	#include <linux/skbuff.h>
	24	#include <linux/proc_fs.h>
	25	#include <linux/seq_file.h>
	26	#include <linux/percpu.h>
	27	#include <linux/netdevice.h>
	28	#ifdef CONFIG_SYSCTL
	29	#include <linux/sysctl.h>
	30	#endif
	31
9fb9cbb1	32	#include <net/netfilter/nf_conntrack.h>
f6180121	33	#include <net/netfilter/nf_conntrack_core.h>
9fb9cbb1	34	#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6	35	#include <net/netfilter/nf_conntrack_l4proto.h>
77ab9cff	36	#include <net/netfilter/nf_conntrack_expect.h>
9fb9cbb1	37	#include <net/netfilter/nf_conntrack_helper.h>
9fb9cbb1 YK	38
	39	#if 0
	40	#define DEBUGP printk
	41	#else
	42	#define DEBUGP(format, args...)
	43	#endif
	44
	45	MODULE_LICENSE("GPL");
	46
9fb9cbb1	47	#ifdef CONFIG_PROC_FS
77ab9cff	48	int
9fb9cbb1 YK	49	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
9fb9cbb1 YK	50	struct nf_conntrack_l3proto *l3proto,
605dcad6	51	struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	52	{
605dcad6	53	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	54	}
e4bd8bce	55	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1 YK	56
	57	#ifdef CONFIG_NF_CT_ACCT
	58	static unsigned int
	59	seq_print_counters(struct seq_file *s,
	60	const struct ip_conntrack_counter *counter)
	61	{
	62	return seq_printf(s, "packets=%llu bytes=%llu ",
	63	(unsigned long long)counter->packets,
	64	(unsigned long long)counter->bytes);
	65	}
	66	#else
	67	#define seq_print_counters(x, y) 0
	68	#endif
	69
	70	struct ct_iter_state {
	71	unsigned int bucket;
	72	};
	73
	74	static struct list_head ct_get_first(struct seq_file seq)
	75	{
	76	struct ct_iter_state *st = seq->private;
	77
	78	for (st->bucket = 0;
	79	st->bucket < nf_conntrack_htable_size;
	80	st->bucket++) {
	81	if (!list_empty(&nf_conntrack_hash[st->bucket]))
	82	return nf_conntrack_hash[st->bucket].next;
	83	}
	84	return NULL;
	85	}
	86
	87	static struct list_head ct_get_next(struct seq_file seq, struct list_head *head)
	88	{
	89	struct ct_iter_state *st = seq->private;
	90
	91	head = head->next;
	92	while (head == &nf_conntrack_hash[st->bucket]) {
	93	if (++st->bucket >= nf_conntrack_htable_size)
	94	return NULL;
	95	head = nf_conntrack_hash[st->bucket].next;
	96	}
	97	return head;
	98	}
	99
	100	static struct list_head ct_get_idx(struct seq_file seq, loff_t pos)
	101	{
	102	struct list_head *head = ct_get_first(seq);
	103
	104	if (head)
	105	while (pos && (head = ct_get_next(seq, head)))
	106	pos--;
	107	return pos ? NULL : head;
	108	}
	109
	110	static void ct_seq_start(struct seq_file seq, loff_t *pos)
	111	{
	112	read_lock_bh(&nf_conntrack_lock);
	113	return ct_get_idx(seq, *pos);
	114	}
	115
	116	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	117	{
	118	(*pos)++;
	119	return ct_get_next(s, v);
120	}
121
122	static void ct_seq_stop(struct seq_file s, void v)
123	{
124	read_unlock_bh(&nf_conntrack_lock);
125	}
126
127	/* return 0 on success, 1 in case of error */
128	static int ct_seq_show(struct seq_file s, void v)
129	{
130	const struct nf_conntrack_tuple_hash *hash = v;
131	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
132	struct nf_conntrack_l3proto *l3proto;
605dcad6	133	struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	134
9fb9cbb1 YK	135	NF_CT_ASSERT(conntrack);
	136
	137	/* we only want to print DIR_ORIGINAL */
	138	if (NF_CT_DIRECTION(hash))
	139	return 0;
	140
c1d10adb PNA	141	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	142	.tuple.src.l3num);
9fb9cbb1 YK	143
9fb9cbb1 YK	144	NF_CT_ASSERT(l3proto);
605dcad6	145	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	146	.tuple.src.l3num,
	147	conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
	148	.tuple.dst.protonum);
605dcad6	149	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	150
	151	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
	152	l3proto->name,
	153	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
605dcad6	154	l4proto->name,
9fb9cbb1 YK	155	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
	156	timer_pending(&conntrack->timeout)
	157	? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
	158	return -ENOSPC;
	159
	160	if (l3proto->print_conntrack(s, conntrack))
	161	return -ENOSPC;
	162
605dcad6	163	if (l4proto->print_conntrack(s, conntrack))
9fb9cbb1 YK	164	return -ENOSPC;
	165
	166	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	167	l3proto, l4proto))
9fb9cbb1 YK	168	return -ENOSPC;
	169
	170	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
	171	return -ENOSPC;
	172
	173	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
	174	if (seq_printf(s, "[UNREPLIED] "))
	175	return -ENOSPC;
	176
	177	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	178	l3proto, l4proto))
9fb9cbb1 YK	179	return -ENOSPC;
	180
	181	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
	182	return -ENOSPC;
	183
	184	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
	185	if (seq_printf(s, "[ASSURED] "))
	186	return -ENOSPC;
	187
	188	#if defined(CONFIG_NF_CONNTRACK_MARK)
	189	if (seq_printf(s, "mark=%u ", conntrack->mark))
	190	return -ENOSPC;
	191	#endif
	192
7c9728c3 JM	193	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	194	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
	195	return -ENOSPC;
	196	#endif
	197
9fb9cbb1 YK	198	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
	199	return -ENOSPC;
	200
	201	return 0;
	202	}
	203
	204	static struct seq_operations ct_seq_ops = {
	205	.start = ct_seq_start,
	206	.next = ct_seq_next,
	207	.stop = ct_seq_stop,
	208	.show = ct_seq_show
	209	};
	210
	211	static int ct_open(struct inode inode, struct file file)
	212	{
	213	struct seq_file *seq;
	214	struct ct_iter_state *st;
	215	int ret;
	216
	217	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	218	if (st == NULL)
	219	return -ENOMEM;
	220	ret = seq_open(file, &ct_seq_ops);
	221	if (ret)
	222	goto out_free;
	223	seq = file->private_data;
	224	seq->private = st;
	225	memset(st, 0, sizeof(struct ct_iter_state));
	226	return ret;
	227	out_free:
	228	kfree(st);
	229	return ret;
	230	}
	231
da7071d7	232	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	233	.owner = THIS_MODULE,
	234	.open = ct_open,
	235	.read = seq_read,
	236	.llseek = seq_lseek,
	237	.release = seq_release_private,
	238	};
	239
9fb9cbb1 YK	240	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	241	{
	242	int cpu;
	243
	244	if (*pos == 0)
	245	return SEQ_START_TOKEN;
	246
	247	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	248	if (!cpu_possible(cpu))
	249	continue;
	250	*pos = cpu + 1;
	251	return &per_cpu(nf_conntrack_stat, cpu);
	252	}
	253
	254	return NULL;
	255	}
	256
	257	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	258	{
	259	int cpu;
	260
	261	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	262	if (!cpu_possible(cpu))
	263	continue;
	264	*pos = cpu + 1;
	265	return &per_cpu(nf_conntrack_stat, cpu);
	266	}
	267
	268	return NULL;
	269	}
	270
	271	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	272	{
	273	}
	274
	275	static int ct_cpu_seq_show(struct seq_file seq, void v)
	276	{
	277	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	278	struct ip_conntrack_stat *st = v;
	279
	280	if (v == SEQ_START_TOKEN) {
	281	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");
	282	return 0;
	283	}
	284
	285	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	286	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	287	nr_conntracks,
	288	st->searched,
	289	st->found,
	290	st->new,
	291	st->invalid,
	292	st->ignore,
	293	st->delete,
	294	st->delete_list,
	295	st->insert,
	296	st->insert_failed,
	297	st->drop,
	298	st->early_drop,
	299	st->error,
	300
	301	st->expect_new,
	302	st->expect_create,
	303	st->expect_delete
304	);
305	return 0;
306	}
307
308	static struct seq_operations ct_cpu_seq_ops = {
309	.start = ct_cpu_seq_start,
310	.next = ct_cpu_seq_next,
311	.stop = ct_cpu_seq_stop,
312	.show = ct_cpu_seq_show,
313	};
314
315	static int ct_cpu_seq_open(struct inode inode, struct file file)
316	{
317	return seq_open(file, &ct_cpu_seq_ops);
318	}
319
da7071d7	320	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	321	.owner = THIS_MODULE,
	322	.open = ct_cpu_seq_open,
	323	.read = seq_read,
	324	.llseek = seq_lseek,
	325	.release = seq_release_private,
	326	};
	327	#endif /* CONFIG_PROC_FS */
	328
	329	/* Sysctl support */
	330
94aec08e	331	int nf_conntrack_checksum __read_mostly = 1;
13b18339	332	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	333
9fb9cbb1	334	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	335	/* Log invalid packets of a given protocol */
	336	static int log_invalid_proto_min = 0;
	337	static int log_invalid_proto_max = 255;
	338
	339	static struct ctl_table_header *nf_ct_sysctl_header;
	340
	341	static ctl_table nf_ct_sysctl_table[] = {
	342	{
	343	.ctl_name = NET_NF_CONNTRACK_MAX,
	344	.procname = "nf_conntrack_max",
	345	.data = &nf_conntrack_max,
	346	.maxlen = sizeof(int),
	347	.mode = 0644,
	348	.proc_handler = &proc_dointvec,
	349	},
	350	{
	351	.ctl_name = NET_NF_CONNTRACK_COUNT,
	352	.procname = "nf_conntrack_count",
	353	.data = &nf_conntrack_count,
	354	.maxlen = sizeof(int),
	355	.mode = 0444,
	356	.proc_handler = &proc_dointvec,
	357	},
	358	{
	359	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	360	.procname = "nf_conntrack_buckets",
	361	.data = &nf_conntrack_htable_size,
	362	.maxlen = sizeof(unsigned int),
	363	.mode = 0444,
	364	.proc_handler = &proc_dointvec,
	365	},
39a27a35 PM	366	{
	367	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	368	.procname = "nf_conntrack_checksum",
	369	.data = &nf_conntrack_checksum,
	370	.maxlen = sizeof(unsigned int),
	371	.mode = 0644,
	372	.proc_handler = &proc_dointvec,
	373	},
9fb9cbb1 YK	374	{
	375	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	376	.procname = "nf_conntrack_log_invalid",
	377	.data = &nf_ct_log_invalid,
	378	.maxlen = sizeof(unsigned int),
	379	.mode = 0644,
	380	.proc_handler = &proc_dointvec_minmax,
	381	.strategy = &sysctl_intvec,
	382	.extra1 = &log_invalid_proto_min,
	383	.extra2 = &log_invalid_proto_max,
	384	},
9fb9cbb1 YK	385
	386	{ .ctl_name = 0 }
	387	};
	388
	389	#define NET_NF_CONNTRACK_MAX 2089
	390
	391	static ctl_table nf_ct_netfilter_table[] = {
	392	{
	393	.ctl_name = NET_NETFILTER,
	394	.procname = "netfilter",
	395	.mode = 0555,
	396	.child = nf_ct_sysctl_table,
	397	},
	398	{
	399	.ctl_name = NET_NF_CONNTRACK_MAX,
	400	.procname = "nf_conntrack_max",
	401	.data = &nf_conntrack_max,
	402	.maxlen = sizeof(int),
	403	.mode = 0644,
	404	.proc_handler = &proc_dointvec,
	405	},
	406	{ .ctl_name = 0 }
	407	};
	408
	409	static ctl_table nf_ct_net_table[] = {
	410	{
	411	.ctl_name = CTL_NET,
	412	.procname = "net",
	413	.mode = 0555,
	414	.child = nf_ct_netfilter_table,
	415	},
	416	{ .ctl_name = 0 }
	417	};
13b18339	418	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
9fb9cbb1 YK	419	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	420
65b4b4e8	421	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	422	{
32292a7f PM	423	#ifdef CONFIG_PROC_FS
	424	struct proc_dir_entry proc, proc_exp, *proc_stat;
	425	#endif
	426	int ret = 0;
	427
	428	ret = nf_conntrack_init();
	429	if (ret < 0)
	430	return ret;
	431
	432	#ifdef CONFIG_PROC_FS
	433	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	434	if (!proc) goto cleanup_init;
	435
	436	proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440,
	437	&exp_file_ops);
	438	if (!proc_exp) goto cleanup_proc;
	439
	440	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
	441	if (!proc_stat)
	442	goto cleanup_proc_exp;
	443
	444	proc_stat->proc_fops = &ct_cpu_seq_fops;
	445	proc_stat->owner = THIS_MODULE;
	446	#endif
	447	#ifdef CONFIG_SYSCTL
	448	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
	449	if (nf_ct_sysctl_header == NULL) {
	450	printk("nf_conntrack: can't register to sysctl.\n");
	451	ret = -ENOMEM;
	452	goto cleanup_proc_stat;
	453	}
	454	#endif
	455	return ret;
	456
	457	#ifdef CONFIG_SYSCTL
	458	cleanup_proc_stat:
	459	#endif
	460	#ifdef CONFIG_PROC_FS
	461	remove_proc_entry("nf_conntrack", proc_net_stat);
	462	cleanup_proc_exp:
	463	proc_net_remove("nf_conntrack_expect");
	464	cleanup_proc:
	465	proc_net_remove("nf_conntrack");
	466	cleanup_init:
	467	#endif /* CNFIG_PROC_FS */
	468	nf_conntrack_cleanup();
	469	return ret;
9fb9cbb1 YK	470	}
9fb9cbb1 YK	471
65b4b4e8	472	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	473	{
32292a7f PM	474	#ifdef CONFIG_SYSCTL
	475	unregister_sysctl_table(nf_ct_sysctl_header);
	476	#endif
	477	#ifdef CONFIG_PROC_FS
	478	remove_proc_entry("nf_conntrack", proc_net_stat);
	479	proc_net_remove("nf_conntrack_expect");
	480	proc_net_remove("nf_conntrack");
	481	#endif /* CNFIG_PROC_FS */
	482	nf_conntrack_cleanup();
9fb9cbb1 YK	483	}
9fb9cbb1 YK	484
65b4b4e8 AM	485	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	486	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	487
	488	/* Some modules need us, but don't depend directly on any symbol.
	489	They should call this. */
2e4e6a17	490	void need_conntrack(void)
9fb9cbb1 YK	491	{
9fb9cbb1 YK	492	}
13b18339	493	EXPORT_SYMBOL_GPL(need_conntrack);