[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>
#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 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 (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_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_stat = create_proc_entry("nf_conntrack", S_IRUGO, 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_table(nf_ct_net_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", proc_net_stat);
 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");
#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>
	17	#ifdef CONFIG_SYSCTL
	18	#include <linux/sysctl.h>
	19	#endif
	20
9fb9cbb1	21	#include <net/netfilter/nf_conntrack.h>
f6180121	22	#include <net/netfilter/nf_conntrack_core.h>
9fb9cbb1	23	#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6	24	#include <net/netfilter/nf_conntrack_l4proto.h>
77ab9cff	25	#include <net/netfilter/nf_conntrack_expect.h>
9fb9cbb1	26	#include <net/netfilter/nf_conntrack_helper.h>
9fb9cbb1 YK	27
	28	#if 0
	29	#define DEBUGP printk
	30	#else
	31	#define DEBUGP(format, args...)
	32	#endif
	33
	34	MODULE_LICENSE("GPL");
	35
9fb9cbb1	36	#ifdef CONFIG_PROC_FS
77ab9cff	37	int
9fb9cbb1 YK	38	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
9fb9cbb1 YK	39	struct nf_conntrack_l3proto *l3proto,
605dcad6	40	struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	41	{
605dcad6	42	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	43	}
e4bd8bce	44	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1 YK	45
	46	#ifdef CONFIG_NF_CT_ACCT
	47	static unsigned int
	48	seq_print_counters(struct seq_file *s,
	49	const struct ip_conntrack_counter *counter)
	50	{
	51	return seq_printf(s, "packets=%llu bytes=%llu ",
	52	(unsigned long long)counter->packets,
	53	(unsigned long long)counter->bytes);
	54	}
	55	#else
	56	#define seq_print_counters(x, y) 0
	57	#endif
	58
	59	struct ct_iter_state {
	60	unsigned int bucket;
	61	};
	62
f205c5e0	63	static struct hlist_node ct_get_first(struct seq_file seq)
9fb9cbb1 YK	64	{
	65	struct ct_iter_state *st = seq->private;
	66
	67	for (st->bucket = 0;
	68	st->bucket < nf_conntrack_htable_size;
	69	st->bucket++) {
f205c5e0 PM	70	if (!hlist_empty(&nf_conntrack_hash[st->bucket]))
f205c5e0 PM	71	return nf_conntrack_hash[st->bucket].first;
9fb9cbb1 YK	72	}
	73	return NULL;
	74	}
	75
f205c5e0 PM	76	static struct hlist_node ct_get_next(struct seq_file seq,
f205c5e0 PM	77	struct hlist_node *head)
9fb9cbb1 YK	78	{
	79	struct ct_iter_state *st = seq->private;
	80
	81	head = head->next;
f205c5e0	82	while (head == NULL) {
9fb9cbb1 YK	83	if (++st->bucket >= nf_conntrack_htable_size)
9fb9cbb1 YK	84	return NULL;
f205c5e0	85	head = nf_conntrack_hash[st->bucket].first;
9fb9cbb1 YK	86	}
	87	return head;
	88	}
	89
f205c5e0	90	static struct hlist_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	91	{
f205c5e0	92	struct hlist_node *head = ct_get_first(seq);
9fb9cbb1 YK	93
	94	if (head)
	95	while (pos && (head = ct_get_next(seq, head)))
	96	pos--;
	97	return pos ? NULL : head;
	98	}
	99
	100	static void ct_seq_start(struct seq_file seq, loff_t *pos)
	101	{
	102	read_lock_bh(&nf_conntrack_lock);
	103	return ct_get_idx(seq, *pos);
	104	}
	105
	106	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	107	{
	108	(*pos)++;
	109	return ct_get_next(s, v);
	110	}
	111
	112	static void ct_seq_stop(struct seq_file s, void v)
	113	{
	114	read_unlock_bh(&nf_conntrack_lock);
	115	}
	116
	117	/* return 0 on success, 1 in case of error */
	118	static int ct_seq_show(struct seq_file s, void v)
	119	{
	120	const struct nf_conntrack_tuple_hash *hash = v;
	121	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
	122	struct nf_conntrack_l3proto *l3proto;
605dcad6	123	struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	124
9fb9cbb1 YK	125	NF_CT_ASSERT(conntrack);
	126
	127	/* we only want to print DIR_ORIGINAL */
	128	if (NF_CT_DIRECTION(hash))
	129	return 0;
	130
c1d10adb PNA	131	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	132	.tuple.src.l3num);
9fb9cbb1 YK	133
9fb9cbb1 YK	134	NF_CT_ASSERT(l3proto);
605dcad6	135	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	136	.tuple.src.l3num,
	137	conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
	138	.tuple.dst.protonum);
605dcad6	139	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	140
	141	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
	142	l3proto->name,
	143	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
605dcad6	144	l4proto->name,
9fb9cbb1 YK	145	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
	146	timer_pending(&conntrack->timeout)
	147	? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
	148	return -ENOSPC;
	149
	150	if (l3proto->print_conntrack(s, conntrack))
	151	return -ENOSPC;
	152
605dcad6	153	if (l4proto->print_conntrack(s, conntrack))
9fb9cbb1 YK	154	return -ENOSPC;
	155
	156	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	157	l3proto, l4proto))
9fb9cbb1 YK	158	return -ENOSPC;
	159
	160	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
	161	return -ENOSPC;
	162
	163	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
	164	if (seq_printf(s, "[UNREPLIED] "))
	165	return -ENOSPC;
	166
	167	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	168	l3proto, l4proto))
9fb9cbb1 YK	169	return -ENOSPC;
	170
	171	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
	172	return -ENOSPC;
	173
	174	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
	175	if (seq_printf(s, "[ASSURED] "))
	176	return -ENOSPC;
	177
	178	#if defined(CONFIG_NF_CONNTRACK_MARK)
	179	if (seq_printf(s, "mark=%u ", conntrack->mark))
	180	return -ENOSPC;
	181	#endif
	182
7c9728c3 JM	183	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	184	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
	185	return -ENOSPC;
	186	#endif
	187
9fb9cbb1 YK	188	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
	189	return -ENOSPC;
	190
	191	return 0;
	192	}
	193
	194	static struct seq_operations ct_seq_ops = {
	195	.start = ct_seq_start,
	196	.next = ct_seq_next,
	197	.stop = ct_seq_stop,
	198	.show = ct_seq_show
	199	};
	200
	201	static int ct_open(struct inode inode, struct file file)
	202	{
	203	struct seq_file *seq;
	204	struct ct_iter_state *st;
	205	int ret;
	206
	207	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	208	if (st == NULL)
	209	return -ENOMEM;
	210	ret = seq_open(file, &ct_seq_ops);
	211	if (ret)
	212	goto out_free;
	213	seq = file->private_data;
	214	seq->private = st;
	215	memset(st, 0, sizeof(struct ct_iter_state));
	216	return ret;
	217	out_free:
	218	kfree(st);
	219	return ret;
	220	}
	221
da7071d7	222	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	223	.owner = THIS_MODULE,
	224	.open = ct_open,
	225	.read = seq_read,
	226	.llseek = seq_lseek,
	227	.release = seq_release_private,
	228	};
	229
9fb9cbb1 YK	230	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	231	{
	232	int cpu;
	233
	234	if (*pos == 0)
	235	return SEQ_START_TOKEN;
	236
	237	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	238	if (!cpu_possible(cpu))
	239	continue;
	240	*pos = cpu + 1;
	241	return &per_cpu(nf_conntrack_stat, cpu);
	242	}
	243
	244	return NULL;
	245	}
	246
	247	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	248	{
	249	int cpu;
	250
	251	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	252	if (!cpu_possible(cpu))
	253	continue;
	254	*pos = cpu + 1;
	255	return &per_cpu(nf_conntrack_stat, cpu);
	256	}
	257
	258	return NULL;
	259	}
	260
	261	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	262	{
	263	}
	264
	265	static int ct_cpu_seq_show(struct seq_file seq, void v)
	266	{
	267	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	268	struct ip_conntrack_stat *st = v;
	269
	270	if (v == SEQ_START_TOKEN) {
	271	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");
	272	return 0;
	273	}
	274
	275	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	276	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	277	nr_conntracks,
	278	st->searched,
	279	st->found,
	280	st->new,
	281	st->invalid,
	282	st->ignore,
	283	st->delete,
	284	st->delete_list,
	285	st->insert,
	286	st->insert_failed,
	287	st->drop,
	288	st->early_drop,
	289	st->error,
	290
	291	st->expect_new,
	292	st->expect_create,
	293	st->expect_delete
294	);
295	return 0;
296	}
297
298	static struct seq_operations ct_cpu_seq_ops = {
299	.start = ct_cpu_seq_start,
300	.next = ct_cpu_seq_next,
301	.stop = ct_cpu_seq_stop,
302	.show = ct_cpu_seq_show,
303	};
304
305	static int ct_cpu_seq_open(struct inode inode, struct file file)
306	{
307	return seq_open(file, &ct_cpu_seq_ops);
308	}
309
da7071d7	310	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	311	.owner = THIS_MODULE,
	312	.open = ct_cpu_seq_open,
	313	.read = seq_read,
	314	.llseek = seq_lseek,
	315	.release = seq_release_private,
	316	};
	317	#endif /* CONFIG_PROC_FS */
	318
	319	/* Sysctl support */
	320
94aec08e	321	int nf_conntrack_checksum __read_mostly = 1;
13b18339	322	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	323
9fb9cbb1	324	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	325	/* Log invalid packets of a given protocol */
	326	static int log_invalid_proto_min = 0;
	327	static int log_invalid_proto_max = 255;
	328
	329	static struct ctl_table_header *nf_ct_sysctl_header;
	330
	331	static ctl_table nf_ct_sysctl_table[] = {
	332	{
	333	.ctl_name = NET_NF_CONNTRACK_MAX,
	334	.procname = "nf_conntrack_max",
	335	.data = &nf_conntrack_max,
	336	.maxlen = sizeof(int),
	337	.mode = 0644,
	338	.proc_handler = &proc_dointvec,
	339	},
	340	{
	341	.ctl_name = NET_NF_CONNTRACK_COUNT,
	342	.procname = "nf_conntrack_count",
	343	.data = &nf_conntrack_count,
	344	.maxlen = sizeof(int),
	345	.mode = 0444,
	346	.proc_handler = &proc_dointvec,
	347	},
	348	{
	349	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	350	.procname = "nf_conntrack_buckets",
	351	.data = &nf_conntrack_htable_size,
	352	.maxlen = sizeof(unsigned int),
	353	.mode = 0444,
	354	.proc_handler = &proc_dointvec,
	355	},
39a27a35 PM	356	{
	357	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	358	.procname = "nf_conntrack_checksum",
	359	.data = &nf_conntrack_checksum,
	360	.maxlen = sizeof(unsigned int),
	361	.mode = 0644,
	362	.proc_handler = &proc_dointvec,
	363	},
9fb9cbb1 YK	364	{
	365	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	366	.procname = "nf_conntrack_log_invalid",
	367	.data = &nf_ct_log_invalid,
	368	.maxlen = sizeof(unsigned int),
	369	.mode = 0644,
	370	.proc_handler = &proc_dointvec_minmax,
	371	.strategy = &sysctl_intvec,
	372	.extra1 = &log_invalid_proto_min,
	373	.extra2 = &log_invalid_proto_max,
	374	},
9fb9cbb1 YK	375
	376	{ .ctl_name = 0 }
	377	};
	378
	379	#define NET_NF_CONNTRACK_MAX 2089
	380
	381	static ctl_table nf_ct_netfilter_table[] = {
	382	{
	383	.ctl_name = NET_NETFILTER,
	384	.procname = "netfilter",
	385	.mode = 0555,
	386	.child = nf_ct_sysctl_table,
	387	},
	388	{
	389	.ctl_name = NET_NF_CONNTRACK_MAX,
	390	.procname = "nf_conntrack_max",
	391	.data = &nf_conntrack_max,
	392	.maxlen = sizeof(int),
	393	.mode = 0644,
	394	.proc_handler = &proc_dointvec,
	395	},
	396	{ .ctl_name = 0 }
	397	};
	398
	399	static ctl_table nf_ct_net_table[] = {
	400	{
	401	.ctl_name = CTL_NET,
	402	.procname = "net",
	403	.mode = 0555,
	404	.child = nf_ct_netfilter_table,
	405	},
	406	{ .ctl_name = 0 }
	407	};
13b18339	408	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
9fb9cbb1 YK	409	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	410
65b4b4e8	411	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	412	{
32292a7f	413	#ifdef CONFIG_PROC_FS
e9c1b084	414	struct proc_dir_entry proc, proc_stat;
32292a7f PM	415	#endif
	416	int ret = 0;
	417
	418	ret = nf_conntrack_init();
	419	if (ret < 0)
	420	return ret;
	421
	422	#ifdef CONFIG_PROC_FS
	423	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	424	if (!proc) goto cleanup_init;
	425
32292a7f PM	426	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
32292a7f PM	427	if (!proc_stat)
e9c1b084	428	goto cleanup_proc;
32292a7f PM	429
	430	proc_stat->proc_fops = &ct_cpu_seq_fops;
	431	proc_stat->owner = THIS_MODULE;
	432	#endif
	433	#ifdef CONFIG_SYSCTL
0b4d4147	434	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table);
32292a7f PM	435	if (nf_ct_sysctl_header == NULL) {
	436	printk("nf_conntrack: can't register to sysctl.\n");
	437	ret = -ENOMEM;
	438	goto cleanup_proc_stat;
	439	}
	440	#endif
	441	return ret;
	442
	443	#ifdef CONFIG_SYSCTL
	444	cleanup_proc_stat:
	445	#endif
	446	#ifdef CONFIG_PROC_FS
	447	remove_proc_entry("nf_conntrack", proc_net_stat);
32292a7f PM	448	cleanup_proc:
	449	proc_net_remove("nf_conntrack");
	450	cleanup_init:
	451	#endif /* CNFIG_PROC_FS */
	452	nf_conntrack_cleanup();
	453	return ret;
9fb9cbb1 YK	454	}
9fb9cbb1 YK	455
65b4b4e8	456	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	457	{
32292a7f	458	#ifdef CONFIG_SYSCTL
601e68e1	459	unregister_sysctl_table(nf_ct_sysctl_header);
32292a7f PM	460	#endif
	461	#ifdef CONFIG_PROC_FS
	462	remove_proc_entry("nf_conntrack", proc_net_stat);
32292a7f PM	463	proc_net_remove("nf_conntrack");
	464	#endif /* CNFIG_PROC_FS */
	465	nf_conntrack_cleanup();
9fb9cbb1 YK	466	}
9fb9cbb1 YK	467
65b4b4e8 AM	468	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	469	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	470
	471	/* Some modules need us, but don't depend directly on any symbol.
	472	They should call this. */
2e4e6a17	473	void need_conntrack(void)
9fb9cbb1 YK	474	{
9fb9cbb1 YK	475	}
13b18339	476	EXPORT_SYMBOL_GPL(need_conntrack);