[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,
            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);

#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;
	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(ct->tuplehash[IP_CT_DIR_ORIGINAL]
				       .tuple.src.l3num);

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

	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
		       l3proto->name,
		       ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
		       l4proto->name,
		       ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
		       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_counters(s, &ct->counters[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_counters(s, &ct->counters[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 = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
	if (!pde)
		goto out_stat_nf_conntrack;
	pde->proc_fops = &ct_cpu_seq_fops;
	pde->owner = THIS_MODULE;
	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>
9fb9cbb1	28
9fb9cbb1 YK	29	MODULE_LICENSE("GPL");
9fb9cbb1 YK	30
9fb9cbb1	31	#ifdef CONFIG_PROC_FS
77ab9cff	32	int
9fb9cbb1	33	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
32948588 JE	34	const struct nf_conntrack_l3proto *l3proto,
32948588 JE	35	const 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	{
9fb9cbb1 YK	60	struct ct_iter_state *st = seq->private;
76507f69	61	struct hlist_node *n;
9fb9cbb1 YK	62
	63	for (st->bucket = 0;
	64	st->bucket < nf_conntrack_htable_size;
	65	st->bucket++) {
76507f69 PM	66	n = rcu_dereference(nf_conntrack_hash[st->bucket].first);
	67	if (n)
	68	return n;
9fb9cbb1 YK	69	}
	70	return NULL;
	71	}
	72
f205c5e0 PM	73	static struct hlist_node ct_get_next(struct seq_file seq,
f205c5e0 PM	74	struct hlist_node *head)
9fb9cbb1 YK	75	{
	76	struct ct_iter_state *st = seq->private;
	77
76507f69	78	head = rcu_dereference(head->next);
f205c5e0	79	while (head == NULL) {
9fb9cbb1 YK	80	if (++st->bucket >= nf_conntrack_htable_size)
9fb9cbb1 YK	81	return NULL;
76507f69	82	head = rcu_dereference(nf_conntrack_hash[st->bucket].first);
9fb9cbb1 YK	83	}
	84	return head;
	85	}
	86
f205c5e0	87	static struct hlist_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	88	{
f205c5e0	89	struct hlist_node *head = ct_get_first(seq);
9fb9cbb1 YK	90
	91	if (head)
	92	while (pos && (head = ct_get_next(seq, head)))
	93	pos--;
	94	return pos ? NULL : head;
	95	}
	96
	97	static void ct_seq_start(struct seq_file seq, loff_t *pos)
76507f69	98	__acquires(RCU)
9fb9cbb1	99	{
76507f69	100	rcu_read_lock();
9fb9cbb1 YK	101	return ct_get_idx(seq, *pos);
	102	}
	103
	104	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	105	{
	106	(*pos)++;
	107	return ct_get_next(s, v);
	108	}
	109
	110	static void ct_seq_stop(struct seq_file s, void v)
76507f69	111	__releases(RCU)
9fb9cbb1	112	{
76507f69	113	rcu_read_unlock();
9fb9cbb1 YK	114	}
	115
	116	/* return 0 on success, 1 in case of error */
	117	static int ct_seq_show(struct seq_file s, void v)
	118	{
	119	const struct nf_conntrack_tuple_hash *hash = v;
c88130bc	120	const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
32948588 JE	121	const struct nf_conntrack_l3proto *l3proto;
32948588 JE	122	const struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	123
c88130bc	124	NF_CT_ASSERT(ct);
9fb9cbb1 YK	125
	126	/* we only want to print DIR_ORIGINAL */
	127	if (NF_CT_DIRECTION(hash))
	128	return 0;
	129
c88130bc	130	l3proto = __nf_ct_l3proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb	131	.tuple.src.l3num);
9fb9cbb1 YK	132
9fb9cbb1 YK	133	NF_CT_ASSERT(l3proto);
c88130bc	134	l4proto = __nf_ct_l4proto_find(ct->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb	135	.tuple.src.l3num,
c88130bc	136	ct->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb	137	.tuple.dst.protonum);
605dcad6	138	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	139
	140	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
	141	l3proto->name,
c88130bc	142	ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
605dcad6	143	l4proto->name,
c88130bc PM	144	ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
	145	timer_pending(&ct->timeout)
	146	? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
9fb9cbb1 YK	147	return -ENOSPC;
9fb9cbb1 YK	148
c88130bc	149	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
9fb9cbb1 YK	150	return -ENOSPC;
9fb9cbb1 YK	151
c88130bc	152	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	153	l3proto, l4proto))
9fb9cbb1 YK	154	return -ENOSPC;
9fb9cbb1 YK	155
c88130bc	156	if (seq_print_counters(s, &ct->counters[IP_CT_DIR_ORIGINAL]))
9fb9cbb1 YK	157	return -ENOSPC;
9fb9cbb1 YK	158
c88130bc	159	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
9fb9cbb1 YK	160	if (seq_printf(s, "[UNREPLIED] "))
	161	return -ENOSPC;
	162
c88130bc	163	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	164	l3proto, l4proto))
9fb9cbb1 YK	165	return -ENOSPC;
9fb9cbb1 YK	166
c88130bc	167	if (seq_print_counters(s, &ct->counters[IP_CT_DIR_REPLY]))
9fb9cbb1 YK	168	return -ENOSPC;
9fb9cbb1 YK	169
c88130bc	170	if (test_bit(IPS_ASSURED_BIT, &ct->status))
9fb9cbb1 YK	171	if (seq_printf(s, "[ASSURED] "))
	172	return -ENOSPC;
	173
	174	#if defined(CONFIG_NF_CONNTRACK_MARK)
c88130bc	175	if (seq_printf(s, "mark=%u ", ct->mark))
9fb9cbb1 YK	176	return -ENOSPC;
	177	#endif
	178
7c9728c3	179	#ifdef CONFIG_NF_CONNTRACK_SECMARK
c88130bc	180	if (seq_printf(s, "secmark=%u ", ct->secmark))
7c9728c3 JM	181	return -ENOSPC;
	182	#endif
	183
c88130bc	184	if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
9fb9cbb1	185	return -ENOSPC;
a5d29264	186
9fb9cbb1 YK	187	return 0;
	188	}
	189
56b3d975	190	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	191	.start = ct_seq_start,
	192	.next = ct_seq_next,
	193	.stop = ct_seq_stop,
	194	.show = ct_seq_show
	195	};
	196
	197	static int ct_open(struct inode inode, struct file file)
	198	{
e2da5913 PE	199	return seq_open_private(file, &ct_seq_ops,
e2da5913 PE	200	sizeof(struct ct_iter_state));
9fb9cbb1 YK	201	}
9fb9cbb1 YK	202
da7071d7	203	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	204	.owner = THIS_MODULE,
	205	.open = ct_open,
	206	.read = seq_read,
	207	.llseek = seq_lseek,
	208	.release = seq_release_private,
	209	};
	210
9fb9cbb1 YK	211	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	212	{
	213	int cpu;
	214
	215	if (*pos == 0)
	216	return SEQ_START_TOKEN;
	217
	218	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	219	if (!cpu_possible(cpu))
	220	continue;
	221	*pos = cpu + 1;
	222	return &per_cpu(nf_conntrack_stat, cpu);
	223	}
	224
	225	return NULL;
	226	}
	227
	228	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	229	{
	230	int cpu;
	231
	232	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	233	if (!cpu_possible(cpu))
	234	continue;
	235	*pos = cpu + 1;
	236	return &per_cpu(nf_conntrack_stat, cpu);
	237	}
	238
	239	return NULL;
	240	}
	241
	242	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	243	{
	244	}
	245
	246	static int ct_cpu_seq_show(struct seq_file seq, void v)
	247	{
	248	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
32948588	249	const struct ip_conntrack_stat *st = v;
9fb9cbb1 YK	250
	251	if (v == SEQ_START_TOKEN) {
	252	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");
	253	return 0;
	254	}
	255
	256	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	257	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	258	nr_conntracks,
	259	st->searched,
	260	st->found,
	261	st->new,
	262	st->invalid,
	263	st->ignore,
	264	st->delete,
	265	st->delete_list,
	266	st->insert,
	267	st->insert_failed,
	268	st->drop,
	269	st->early_drop,
	270	st->error,
	271
	272	st->expect_new,
	273	st->expect_create,
	274	st->expect_delete
	275	);
	276	return 0;
	277	}
	278
56b3d975	279	static const struct seq_operations ct_cpu_seq_ops = {
9fb9cbb1 YK	280	.start = ct_cpu_seq_start,
	281	.next = ct_cpu_seq_next,
	282	.stop = ct_cpu_seq_stop,
	283	.show = ct_cpu_seq_show,
	284	};
	285
	286	static int ct_cpu_seq_open(struct inode inode, struct file file)
	287	{
	288	return seq_open(file, &ct_cpu_seq_ops);
	289	}
	290
da7071d7	291	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	292	.owner = THIS_MODULE,
	293	.open = ct_cpu_seq_open,
	294	.read = seq_read,
	295	.llseek = seq_lseek,
665bba10	296	.release = seq_release,
9fb9cbb1	297	};
b916f7d4 AD	298
	299	static int nf_conntrack_standalone_init_proc(void)
	300	{
	301	struct proc_dir_entry *pde;
	302
	303	pde = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
	304	if (!pde)
	305	goto out_nf_conntrack;
	306	pde = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat);
	307	if (!pde)
	308	goto out_stat_nf_conntrack;
	309	pde->proc_fops = &ct_cpu_seq_fops;
	310	pde->owner = THIS_MODULE;
	311	return 0;
	312
	313	out_stat_nf_conntrack:
	314	proc_net_remove(&init_net, "nf_conntrack");
	315	out_nf_conntrack:
	316	return -ENOMEM;
	317	}
	318
	319	static void nf_conntrack_standalone_fini_proc(void)
	320	{
	321	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
	322	proc_net_remove(&init_net, "nf_conntrack");
	323	}
	324	#else
	325	static int nf_conntrack_standalone_init_proc(void)
	326	{
	327	return 0;
	328	}
	329
	330	static void nf_conntrack_standalone_fini_proc(void)
	331	{
	332	}
9fb9cbb1 YK	333	#endif /* CONFIG_PROC_FS */
	334
	335	/* Sysctl support */
	336
94aec08e	337	int nf_conntrack_checksum __read_mostly = 1;
13b18339	338	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	339
9fb9cbb1	340	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	341	/* Log invalid packets of a given protocol */
	342	static int log_invalid_proto_min = 0;
	343	static int log_invalid_proto_max = 255;
	344
	345	static struct ctl_table_header *nf_ct_sysctl_header;
	346
	347	static ctl_table nf_ct_sysctl_table[] = {
	348	{
	349	.ctl_name = NET_NF_CONNTRACK_MAX,
	350	.procname = "nf_conntrack_max",
	351	.data = &nf_conntrack_max,
	352	.maxlen = sizeof(int),
	353	.mode = 0644,
	354	.proc_handler = &proc_dointvec,
	355	},
	356	{
	357	.ctl_name = NET_NF_CONNTRACK_COUNT,
	358	.procname = "nf_conntrack_count",
	359	.data = &nf_conntrack_count,
	360	.maxlen = sizeof(int),
	361	.mode = 0444,
	362	.proc_handler = &proc_dointvec,
	363	},
	364	{
	365	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	366	.procname = "nf_conntrack_buckets",
	367	.data = &nf_conntrack_htable_size,
	368	.maxlen = sizeof(unsigned int),
	369	.mode = 0444,
	370	.proc_handler = &proc_dointvec,
	371	},
39a27a35 PM	372	{
	373	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	374	.procname = "nf_conntrack_checksum",
	375	.data = &nf_conntrack_checksum,
	376	.maxlen = sizeof(unsigned int),
	377	.mode = 0644,
	378	.proc_handler = &proc_dointvec,
	379	},
9fb9cbb1 YK	380	{
	381	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	382	.procname = "nf_conntrack_log_invalid",
	383	.data = &nf_ct_log_invalid,
	384	.maxlen = sizeof(unsigned int),
	385	.mode = 0644,
	386	.proc_handler = &proc_dointvec_minmax,
	387	.strategy = &sysctl_intvec,
	388	.extra1 = &log_invalid_proto_min,
	389	.extra2 = &log_invalid_proto_max,
	390	},
f264a7df PM	391	{
	392	.ctl_name = CTL_UNNUMBERED,
	393	.procname = "nf_conntrack_expect_max",
	394	.data = &nf_ct_expect_max,
	395	.maxlen = sizeof(int),
	396	.mode = 0644,
	397	.proc_handler = &proc_dointvec,
	398	},
9fb9cbb1 YK	399	{ .ctl_name = 0 }
	400	};
	401
	402	#define NET_NF_CONNTRACK_MAX 2089
	403
	404	static ctl_table nf_ct_netfilter_table[] = {
	405	{
	406	.ctl_name = NET_NETFILTER,
	407	.procname = "netfilter",
	408	.mode = 0555,
	409	.child = nf_ct_sysctl_table,
	410	},
	411	{
	412	.ctl_name = NET_NF_CONNTRACK_MAX,
	413	.procname = "nf_conntrack_max",
	414	.data = &nf_conntrack_max,
	415	.maxlen = sizeof(int),
	416	.mode = 0644,
	417	.proc_handler = &proc_dointvec,
	418	},
	419	{ .ctl_name = 0 }
	420	};
	421
9e232495	422	static struct ctl_path nf_ct_path[] = {
3d7cc2ba PE	423	{ .procname = "net", .ctl_name = CTL_NET, },
3d7cc2ba PE	424	{ }
9fb9cbb1	425	};
3d7cc2ba	426
13b18339	427	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
b916f7d4 AD	428
	429	static int nf_conntrack_standalone_init_sysctl(void)
	430	{
	431	nf_ct_sysctl_header =
	432	register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
	433	if (nf_ct_sysctl_header == NULL) {
	434	printk("nf_conntrack: can't register to sysctl.\n");
	435	return -ENOMEM;
	436	}
	437	return 0;
	438
	439	}
	440
	441	static void nf_conntrack_standalone_fini_sysctl(void)
	442	{
	443	unregister_sysctl_table(nf_ct_sysctl_header);
	444	}
	445	#else
	446	static int nf_conntrack_standalone_init_sysctl(void)
	447	{
	448	return 0;
	449	}
	450
	451	static void nf_conntrack_standalone_fini_sysctl(void)
	452	{
	453	}
9fb9cbb1 YK	454	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	455
65b4b4e8	456	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	457	{
b916f7d4	458	int ret;
32292a7f PM	459
	460	ret = nf_conntrack_init();
	461	if (ret < 0)
b916f7d4 AD	462	goto out;
	463	ret = nf_conntrack_standalone_init_proc();
	464	if (ret < 0)
	465	goto out_proc;
	466	ret = nf_conntrack_standalone_init_sysctl();
	467	if (ret < 0)
	468	goto out_sysctl;
	469	return 0;
32292a7f	470
b916f7d4 AD	471	out_sysctl:
	472	nf_conntrack_standalone_fini_proc();
	473	out_proc:
32292a7f	474	nf_conntrack_cleanup();
b916f7d4	475	out:
32292a7f	476	return ret;
9fb9cbb1 YK	477	}
9fb9cbb1 YK	478
65b4b4e8	479	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	480	{
b916f7d4 AD	481	nf_conntrack_standalone_fini_sysctl();
b916f7d4 AD	482	nf_conntrack_standalone_fini_proc();
32292a7f	483	nf_conntrack_cleanup();
9fb9cbb1 YK	484	}
9fb9cbb1 YK	485
65b4b4e8 AM	486	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	487	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	488
	489	/* Some modules need us, but don't depend directly on any symbol.
	490	They should call this. */
2e4e6a17	491	void need_conntrack(void)
9fb9cbb1 YK	492	{
9fb9cbb1 YK	493	}
13b18339	494	EXPORT_SYMBOL_GPL(need_conntrack);