[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>

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 hlist_node *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 (!hlist_empty(&nf_conntrack_hash[st->bucket]))
			return nf_conntrack_hash[st->bucket].first;
	}
	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 = head->next;
	while (head == NULL) {
		if (++st->bucket >= nf_conntrack_htable_size)
			return NULL;
		head = 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)
{
	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 (l4proto->print_conntrack && 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 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);
	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_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	= 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 }
};

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

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_stat;
#endif
	int ret = 0;

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

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

	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
	if (!proc_stat)
		goto cleanup_proc;

	proc_stat->proc_fops = &ct_cpu_seq_fops;
	proc_stat->owner = THIS_MODULE;
#endif
#ifdef CONFIG_SYSCTL
	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");
		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", init_net. proc_net_stat);
 cleanup_proc:
	proc_net_remove(&init_net, "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", init_net.proc_net_stat);
	proc_net_remove(&init_net, "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	/* (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>
9fb9cbb1	28
9fb9cbb1 YK	29	MODULE_LICENSE("GPL");
9fb9cbb1 YK	30
9fb9cbb1	31	#ifdef CONFIG_PROC_FS
77ab9cff	32	int
9fb9cbb1 YK	33	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
9fb9cbb1 YK	34	struct nf_conntrack_l3proto *l3proto,
605dcad6	35	struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	36	{
605dcad6	37	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	38	}
e4bd8bce	39	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1 YK	40
	41	#ifdef CONFIG_NF_CT_ACCT
	42	static unsigned int
	43	seq_print_counters(struct seq_file *s,
	44	const struct ip_conntrack_counter *counter)
	45	{
	46	return seq_printf(s, "packets=%llu bytes=%llu ",
	47	(unsigned long long)counter->packets,
	48	(unsigned long long)counter->bytes);
	49	}
	50	#else
	51	#define seq_print_counters(x, y) 0
	52	#endif
	53
	54	struct ct_iter_state {
	55	unsigned int bucket;
	56	};
	57
f205c5e0	58	static struct hlist_node ct_get_first(struct seq_file seq)
9fb9cbb1 YK	59	{
	60	struct ct_iter_state *st = seq->private;
	61
	62	for (st->bucket = 0;
	63	st->bucket < nf_conntrack_htable_size;
	64	st->bucket++) {
f205c5e0 PM	65	if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
f205c5e0 PM	66	return nf_conntrack_hash[st->bucket].first;
9fb9cbb1 YK	67	}
	68	return NULL;
	69	}
	70
f205c5e0 PM	71	static struct hlist_node ct_get_next(struct seq_file seq,
f205c5e0 PM	72	struct hlist_node *head)
9fb9cbb1 YK	73	{
	74	struct ct_iter_state *st = seq->private;
	75
	76	head = head->next;
f205c5e0	77	while (head == NULL) {
9fb9cbb1 YK	78	if (++st->bucket >= nf_conntrack_htable_size)
9fb9cbb1 YK	79	return NULL;
f205c5e0	80	head = nf_conntrack_hash[st->bucket].first;
9fb9cbb1 YK	81	}
	82	return head;
	83	}
	84
f205c5e0	85	static struct hlist_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	86	{
f205c5e0	87	struct hlist_node *head = ct_get_first(seq);
9fb9cbb1 YK	88
	89	if (head)
	90	while (pos && (head = ct_get_next(seq, head)))
	91	pos--;
	92	return pos ? NULL : head;
	93	}
	94
	95	static void ct_seq_start(struct seq_file seq, loff_t *pos)
	96	{
	97	read_lock_bh(&nf_conntrack_lock);
	98	return ct_get_idx(seq, *pos);
	99	}
	100
	101	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	102	{
	103	(*pos)++;
	104	return ct_get_next(s, v);
	105	}
	106
	107	static void ct_seq_stop(struct seq_file s, void v)
	108	{
	109	read_unlock_bh(&nf_conntrack_lock);
	110	}
	111
	112	/* return 0 on success, 1 in case of error */
	113	static int ct_seq_show(struct seq_file s, void v)
	114	{
	115	const struct nf_conntrack_tuple_hash *hash = v;
	116	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
	117	struct nf_conntrack_l3proto *l3proto;
605dcad6	118	struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	119
9fb9cbb1 YK	120	NF_CT_ASSERT(conntrack);
	121
	122	/* we only want to print DIR_ORIGINAL */
	123	if (NF_CT_DIRECTION(hash))
	124	return 0;
	125
c1d10adb PNA	126	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	127	.tuple.src.l3num);
9fb9cbb1 YK	128
9fb9cbb1 YK	129	NF_CT_ASSERT(l3proto);
605dcad6	130	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	131	.tuple.src.l3num,
	132	conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
	133	.tuple.dst.protonum);
605dcad6	134	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	135
	136	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
	137	l3proto->name,
	138	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
605dcad6	139	l4proto->name,
9fb9cbb1 YK	140	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
	141	timer_pending(&conntrack->timeout)
	142	? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
	143	return -ENOSPC;
	144
c71e9167	145	if (l4proto->print_conntrack && l4proto->print_conntrack(s, conntrack))
9fb9cbb1 YK	146	return -ENOSPC;
	147
	148	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	149	l3proto, l4proto))
9fb9cbb1 YK	150	return -ENOSPC;
	151
	152	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
	153	return -ENOSPC;
	154
	155	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
	156	if (seq_printf(s, "[UNREPLIED] "))
	157	return -ENOSPC;
	158
	159	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	160	l3proto, l4proto))
9fb9cbb1 YK	161	return -ENOSPC;
	162
	163	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
	164	return -ENOSPC;
	165
	166	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
	167	if (seq_printf(s, "[ASSURED] "))
	168	return -ENOSPC;
	169
	170	#if defined(CONFIG_NF_CONNTRACK_MARK)
	171	if (seq_printf(s, "mark=%u ", conntrack->mark))
	172	return -ENOSPC;
	173	#endif
	174
7c9728c3 JM	175	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	176	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
	177	return -ENOSPC;
	178	#endif
	179
9fb9cbb1 YK	180	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
9fb9cbb1 YK	181	return -ENOSPC;
a5d29264	182
9fb9cbb1 YK	183	return 0;
	184	}
	185
56b3d975	186	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	187	.start = ct_seq_start,
	188	.next = ct_seq_next,
	189	.stop = ct_seq_stop,
	190	.show = ct_seq_show
	191	};
	192
	193	static int ct_open(struct inode inode, struct file file)
	194	{
e2da5913 PE	195	return seq_open_private(file, &ct_seq_ops,
e2da5913 PE	196	sizeof(struct ct_iter_state));
9fb9cbb1 YK	197	}
9fb9cbb1 YK	198
da7071d7	199	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	200	.owner = THIS_MODULE,
	201	.open = ct_open,
	202	.read = seq_read,
	203	.llseek = seq_lseek,
	204	.release = seq_release_private,
	205	};
	206
9fb9cbb1 YK	207	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	208	{
	209	int cpu;
	210
	211	if (*pos == 0)
	212	return SEQ_START_TOKEN;
	213
	214	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	215	if (!cpu_possible(cpu))
	216	continue;
	217	*pos = cpu + 1;
	218	return &per_cpu(nf_conntrack_stat, cpu);
	219	}
	220
	221	return NULL;
	222	}
	223
	224	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	225	{
	226	int cpu;
	227
	228	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	229	if (!cpu_possible(cpu))
	230	continue;
	231	*pos = cpu + 1;
	232	return &per_cpu(nf_conntrack_stat, cpu);
	233	}
	234
	235	return NULL;
	236	}
	237
	238	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	239	{
	240	}
	241
	242	static int ct_cpu_seq_show(struct seq_file seq, void v)
	243	{
	244	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	245	struct ip_conntrack_stat *st = v;
	246
	247	if (v == SEQ_START_TOKEN) {
	248	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");
	249	return 0;
	250	}
	251
	252	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	253	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	254	nr_conntracks,
	255	st->searched,
	256	st->found,
	257	st->new,
	258	st->invalid,
	259	st->ignore,
	260	st->delete,
	261	st->delete_list,
	262	st->insert,
	263	st->insert_failed,
	264	st->drop,
	265	st->early_drop,
	266	st->error,
	267
	268	st->expect_new,
	269	st->expect_create,
	270	st->expect_delete
271	);
272	return 0;
273	}
274
56b3d975	275	static const struct seq_operations ct_cpu_seq_ops = {
9fb9cbb1 YK	276	.start = ct_cpu_seq_start,
	277	.next = ct_cpu_seq_next,
	278	.stop = ct_cpu_seq_stop,
	279	.show = ct_cpu_seq_show,
	280	};
	281
	282	static int ct_cpu_seq_open(struct inode inode, struct file file)
	283	{
	284	return seq_open(file, &ct_cpu_seq_ops);
	285	}
	286
da7071d7	287	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	288	.owner = THIS_MODULE,
	289	.open = ct_cpu_seq_open,
	290	.read = seq_read,
	291	.llseek = seq_lseek,
	292	.release = seq_release_private,
	293	};
	294	#endif /* CONFIG_PROC_FS */
	295
	296	/* Sysctl support */
	297
94aec08e	298	int nf_conntrack_checksum __read_mostly = 1;
13b18339	299	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	300
9fb9cbb1	301	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	302	/* Log invalid packets of a given protocol */
	303	static int log_invalid_proto_min = 0;
	304	static int log_invalid_proto_max = 255;
	305
	306	static struct ctl_table_header *nf_ct_sysctl_header;
	307
	308	static ctl_table nf_ct_sysctl_table[] = {
	309	{
	310	.ctl_name = NET_NF_CONNTRACK_MAX,
	311	.procname = "nf_conntrack_max",
	312	.data = &nf_conntrack_max,
	313	.maxlen = sizeof(int),
	314	.mode = 0644,
	315	.proc_handler = &proc_dointvec,
	316	},
	317	{
	318	.ctl_name = NET_NF_CONNTRACK_COUNT,
	319	.procname = "nf_conntrack_count",
	320	.data = &nf_conntrack_count,
	321	.maxlen = sizeof(int),
	322	.mode = 0444,
	323	.proc_handler = &proc_dointvec,
	324	},
	325	{
	326	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	327	.procname = "nf_conntrack_buckets",
	328	.data = &nf_conntrack_htable_size,
	329	.maxlen = sizeof(unsigned int),
	330	.mode = 0444,
	331	.proc_handler = &proc_dointvec,
	332	},
39a27a35 PM	333	{
	334	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	335	.procname = "nf_conntrack_checksum",
	336	.data = &nf_conntrack_checksum,
	337	.maxlen = sizeof(unsigned int),
	338	.mode = 0644,
	339	.proc_handler = &proc_dointvec,
	340	},
9fb9cbb1 YK	341	{
	342	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	343	.procname = "nf_conntrack_log_invalid",
	344	.data = &nf_ct_log_invalid,
	345	.maxlen = sizeof(unsigned int),
	346	.mode = 0644,
	347	.proc_handler = &proc_dointvec_minmax,
	348	.strategy = &sysctl_intvec,
	349	.extra1 = &log_invalid_proto_min,
	350	.extra2 = &log_invalid_proto_max,
	351	},
f264a7df PM	352	{
	353	.ctl_name = CTL_UNNUMBERED,
	354	.procname = "nf_conntrack_expect_max",
	355	.data = &nf_ct_expect_max,
	356	.maxlen = sizeof(int),
	357	.mode = 0644,
	358	.proc_handler = &proc_dointvec,
	359	},
9fb9cbb1 YK	360	{ .ctl_name = 0 }
	361	};
	362
	363	#define NET_NF_CONNTRACK_MAX 2089
	364
	365	static ctl_table nf_ct_netfilter_table[] = {
	366	{
	367	.ctl_name = NET_NETFILTER,
	368	.procname = "netfilter",
	369	.mode = 0555,
	370	.child = nf_ct_sysctl_table,
	371	},
	372	{
	373	.ctl_name = NET_NF_CONNTRACK_MAX,
	374	.procname = "nf_conntrack_max",
	375	.data = &nf_conntrack_max,
	376	.maxlen = sizeof(int),
	377	.mode = 0644,
	378	.proc_handler = &proc_dointvec,
	379	},
	380	{ .ctl_name = 0 }
	381	};
	382
3d7cc2ba PE	383	struct ctl_path nf_ct_path[] = {
	384	{ .procname = "net", .ctl_name = CTL_NET, },
	385	{ }
9fb9cbb1	386	};
3d7cc2ba	387
13b18339	388	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
9fb9cbb1 YK	389	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	390
65b4b4e8	391	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	392	{
32292a7f	393	#ifdef CONFIG_PROC_FS
e9c1b084	394	struct proc_dir_entry proc, proc_stat;
32292a7f PM	395	#endif
	396	int ret = 0;
	397
	398	ret = nf_conntrack_init();
	399	if (ret < 0)
	400	return ret;
	401
	402	#ifdef CONFIG_PROC_FS
457c4cbc	403	proc = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
32292a7f PM	404	if (!proc) goto cleanup_init;
32292a7f PM	405
457c4cbc	406	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
32292a7f	407	if (!proc_stat)
e9c1b084	408	goto cleanup_proc;
32292a7f PM	409
	410	proc_stat->proc_fops = &ct_cpu_seq_fops;
	411	proc_stat->owner = THIS_MODULE;
	412	#endif
	413	#ifdef CONFIG_SYSCTL
3d7cc2ba PE	414	nf_ct_sysctl_header = register_sysctl_paths(nf_ct_path,
3d7cc2ba PE	415	nf_ct_netfilter_table);
32292a7f PM	416	if (nf_ct_sysctl_header == NULL) {
	417	printk("nf_conntrack: can't register to sysctl.\n");
	418	ret = -ENOMEM;
	419	goto cleanup_proc_stat;
	420	}
	421	#endif
	422	return ret;
	423
	424	#ifdef CONFIG_SYSCTL
	425	cleanup_proc_stat:
	426	#endif
	427	#ifdef CONFIG_PROC_FS
457c4cbc	428	remove_proc_entry("nf_conntrack", init_net. proc_net_stat);
32292a7f	429	cleanup_proc:
457c4cbc	430	proc_net_remove(&init_net, "nf_conntrack");
32292a7f PM	431	cleanup_init:
	432	#endif /* CNFIG_PROC_FS */
	433	nf_conntrack_cleanup();
	434	return ret;
9fb9cbb1 YK	435	}
9fb9cbb1 YK	436
65b4b4e8	437	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	438	{
32292a7f	439	#ifdef CONFIG_SYSCTL
601e68e1	440	unregister_sysctl_table(nf_ct_sysctl_header);
32292a7f PM	441	#endif
32292a7f PM	442	#ifdef CONFIG_PROC_FS
457c4cbc EB	443	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
457c4cbc EB	444	proc_net_remove(&init_net, "nf_conntrack");
32292a7f PM	445	#endif /* CNFIG_PROC_FS */
32292a7f PM	446	nf_conntrack_cleanup();
9fb9cbb1 YK	447	}
9fb9cbb1 YK	448
65b4b4e8 AM	449	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	450	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	451
	452	/* Some modules need us, but don't depend directly on any symbol.
	453	They should call this. */
2e4e6a17	454	void need_conntrack(void)
9fb9cbb1 YK	455	{
9fb9cbb1 YK	456	}
13b18339	457	EXPORT_SYMBOL_GPL(need_conntrack);