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

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_acct.h>

MODULE_LICENSE("GPL");

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

struct ct_iter_state {
	struct seq_net_private p;
	unsigned int bucket;
};

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

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

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

	head = rcu_dereference(head->next);
	while (is_a_nulls(head)) {
		if (likely(get_nulls_value(head) == st->bucket)) {
			if (++st->bucket >= nf_conntrack_htable_size)
				return NULL;
		}
		head = rcu_dereference(net->ct.hash[st->bucket].first);
	}
	return head;
}

static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
{
	struct hlist_nulls_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)
{
	struct nf_conntrack_tuple_hash *hash = v;
	struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
	const struct nf_conntrack_l3proto *l3proto;
	const struct nf_conntrack_l4proto *l4proto;
	int ret = 0;

	NF_CT_ASSERT(ct);
	if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
		return 0;

	/* we only want to print DIR_ORIGINAL */
	if (NF_CT_DIRECTION(hash))
		goto release;

	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
	NF_CT_ASSERT(l3proto);
	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
	NF_CT_ASSERT(l4proto);

	ret = -ENOSPC;
	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
		       l3proto->name, nf_ct_l3num(ct),
		       l4proto->name, nf_ct_protonum(ct),
		       timer_pending(&ct->timeout)
		       ? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
		goto release;

	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
		goto release;

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

	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
		goto release;

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

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

	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
		goto release;

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

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

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

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

	ret = 0;
release:
	nf_ct_put(ct);
	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_net(inode, 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_net,
};

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

	if (*pos == 0)
		return SEQ_START_TOKEN;

	for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return per_cpu_ptr(net->ct.stat, cpu);
	}

	return NULL;
}

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

	for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return per_cpu_ptr(net->ct.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)
{
	struct net *net = seq_file_net(seq);
	unsigned int nr_conntracks = atomic_read(&net->ct.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_net(inode, file, &ct_cpu_seq_ops,
			    sizeof(struct seq_net_private));
}

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_net,
};

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

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

	pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat,
			  &ct_cpu_seq_fops);
	if (!pde)
		goto out_stat_nf_conntrack;
	return 0;

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

static void nf_conntrack_standalone_fini_proc(struct net *net)
{
	remove_proc_entry("nf_conntrack", net->proc_net_stat);
	proc_net_remove(net, "nf_conntrack");
}
#else
static int nf_conntrack_standalone_init_proc(struct net *net)
{
	return 0;
}

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

/* Sysctl support */

#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_netfilter_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		= &init_net.ct.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		= &init_net.ct.sysctl_checksum,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_LOG_INVALID,
		.procname	= "nf_conntrack_log_invalid",
		.data		= &init_net.ct.sysctl_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_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, },
	{ }
};

static int nf_conntrack_standalone_init_sysctl(struct net *net)
{
	struct ctl_table *table;

	if (net_eq(net, &init_net)) {
		nf_ct_netfilter_header =
		       register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
		if (!nf_ct_netfilter_header)
			goto out;
	}

	table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
			GFP_KERNEL);
	if (!table)
		goto out_kmemdup;

	table[1].data = &net->ct.count;
	table[3].data = &net->ct.sysctl_checksum;
	table[4].data = &net->ct.sysctl_log_invalid;

	net->ct.sysctl_header = register_net_sysctl_table(net,
					nf_net_netfilter_sysctl_path, table);
	if (!net->ct.sysctl_header)
		goto out_unregister_netfilter;

	return 0;

out_unregister_netfilter:
	kfree(table);
out_kmemdup:
	if (net_eq(net, &init_net))
		unregister_sysctl_table(nf_ct_netfilter_header);
out:
	printk("nf_conntrack: can't register to sysctl.\n");
	return -ENOMEM;
}

static void nf_conntrack_standalone_fini_sysctl(struct net *net)
{
	struct ctl_table *table;

	if (net_eq(net, &init_net))
		unregister_sysctl_table(nf_ct_netfilter_header);
	table = net->ct.sysctl_header->ctl_table_arg;
	unregister_net_sysctl_table(net->ct.sysctl_header);
	kfree(table);
}
#else
static int nf_conntrack_standalone_init_sysctl(struct net *net)
{
	return 0;
}

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

static int nf_conntrack_net_init(struct net *net)
{
	int ret;

	ret = nf_conntrack_init(net);
	if (ret < 0)
		goto out_init;
	ret = nf_conntrack_standalone_init_proc(net);
	if (ret < 0)
		goto out_proc;
	net->ct.sysctl_checksum = 1;
	net->ct.sysctl_log_invalid = 0;
	ret = nf_conntrack_standalone_init_sysctl(net);
	if (ret < 0)
		goto out_sysctl;
	return 0;

out_sysctl:
	nf_conntrack_standalone_fini_proc(net);
out_proc:
	nf_conntrack_cleanup(net);
out_init:
	return ret;
}

static void nf_conntrack_net_exit(struct net *net)
{
	nf_conntrack_standalone_fini_sysctl(net);
	nf_conntrack_standalone_fini_proc(net);
	nf_conntrack_cleanup(net);
}

static struct pernet_operations nf_conntrack_net_ops = {
	.init = nf_conntrack_net_init,
	.exit = nf_conntrack_net_exit,
};

static int __init nf_conntrack_standalone_init(void)
{
	return register_pernet_subsys(&nf_conntrack_net_ops);
}

static void __exit nf_conntrack_standalone_fini(void)
{
	unregister_pernet_subsys(&nf_conntrack_net_ops);
}

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 <[email protected]>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
9fb9cbb1 YK	7	*/
9fb9cbb1 YK	8
9fb9cbb1 YK	9	#include <linux/types.h>
	10	#include <linux/netfilter.h>
	11	#include <linux/module.h>
	12	#include <linux/skbuff.h>
	13	#include <linux/proc_fs.h>
	14	#include <linux/seq_file.h>
	15	#include <linux/percpu.h>
	16	#include <linux/netdevice.h>
457c4cbc	17	#include <net/net_namespace.h>
9fb9cbb1 YK	18	#ifdef CONFIG_SYSCTL
	19	#include <linux/sysctl.h>
	20	#endif
	21
9fb9cbb1	22	#include <net/netfilter/nf_conntrack.h>
f6180121	23	#include <net/netfilter/nf_conntrack_core.h>
9fb9cbb1	24	#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6	25	#include <net/netfilter/nf_conntrack_l4proto.h>
77ab9cff	26	#include <net/netfilter/nf_conntrack_expect.h>
9fb9cbb1	27	#include <net/netfilter/nf_conntrack_helper.h>
58401572	28	#include <net/netfilter/nf_conntrack_acct.h>
9fb9cbb1	29
9fb9cbb1 YK	30	MODULE_LICENSE("GPL");
9fb9cbb1 YK	31
9fb9cbb1	32	#ifdef CONFIG_PROC_FS
77ab9cff	33	int
9fb9cbb1	34	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
32948588 JE	35	const struct nf_conntrack_l3proto *l3proto,
32948588 JE	36	const struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	37	{
605dcad6	38	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1	39	}
e4bd8bce	40	EXPORT_SYMBOL_GPL(print_tuple);
9fb9cbb1	41
9fb9cbb1	42	struct ct_iter_state {
b2ce2c74	43	struct seq_net_private p;
9fb9cbb1 YK	44	unsigned int bucket;
	45	};
	46
ea781f19	47	static struct hlist_nulls_node ct_get_first(struct seq_file seq)
9fb9cbb1	48	{
b2ce2c74	49	struct net *net = seq_file_net(seq);
9fb9cbb1	50	struct ct_iter_state *st = seq->private;
ea781f19	51	struct hlist_nulls_node *n;
9fb9cbb1 YK	52
	53	for (st->bucket = 0;
	54	st->bucket < nf_conntrack_htable_size;
	55	st->bucket++) {
b2ce2c74	56	n = rcu_dereference(net->ct.hash[st->bucket].first);
ea781f19	57	if (!is_a_nulls(n))
76507f69	58	return n;
9fb9cbb1 YK	59	}
	60	return NULL;
	61	}
	62
ea781f19 ED	63	static struct hlist_nulls_node ct_get_next(struct seq_file seq,
ea781f19 ED	64	struct hlist_nulls_node *head)
9fb9cbb1	65	{
b2ce2c74	66	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	67	struct ct_iter_state *st = seq->private;
9fb9cbb1 YK	68
76507f69	69	head = rcu_dereference(head->next);
ea781f19 ED	70	while (is_a_nulls(head)) {
	71	if (likely(get_nulls_value(head) == st->bucket)) {
	72	if (++st->bucket >= nf_conntrack_htable_size)
	73	return NULL;
	74	}
b2ce2c74	75	head = rcu_dereference(net->ct.hash[st->bucket].first);
9fb9cbb1 YK	76	}
	77	return head;
	78	}
	79
ea781f19	80	static struct hlist_nulls_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	81	{
ea781f19	82	struct hlist_nulls_node *head = ct_get_first(seq);
9fb9cbb1 YK	83
	84	if (head)
	85	while (pos && (head = ct_get_next(seq, head)))
	86	pos--;
	87	return pos ? NULL : head;
	88	}
	89
	90	static void ct_seq_start(struct seq_file seq, loff_t *pos)
76507f69	91	__acquires(RCU)
9fb9cbb1	92	{
76507f69	93	rcu_read_lock();
9fb9cbb1 YK	94	return ct_get_idx(seq, *pos);
	95	}
	96
	97	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	98	{
	99	(*pos)++;
	100	return ct_get_next(s, v);
	101	}
	102
	103	static void ct_seq_stop(struct seq_file s, void v)
76507f69	104	__releases(RCU)
9fb9cbb1	105	{
76507f69	106	rcu_read_unlock();
9fb9cbb1 YK	107	}
	108
	109	/* return 0 on success, 1 in case of error */
	110	static int ct_seq_show(struct seq_file s, void v)
	111	{
ea781f19 ED	112	struct nf_conntrack_tuple_hash *hash = v;
ea781f19 ED	113	struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
32948588 JE	114	const struct nf_conntrack_l3proto *l3proto;
32948588 JE	115	const struct nf_conntrack_l4proto *l4proto;
ea781f19	116	int ret = 0;
9fb9cbb1	117
c88130bc	118	NF_CT_ASSERT(ct);
ea781f19 ED	119	if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
ea781f19 ED	120	return 0;
9fb9cbb1 YK	121
	122	/* we only want to print DIR_ORIGINAL */
	123	if (NF_CT_DIRECTION(hash))
ea781f19	124	goto release;
9fb9cbb1	125
5e8fbe2a	126	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
9fb9cbb1	127	NF_CT_ASSERT(l3proto);
5e8fbe2a	128	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
605dcad6	129	NF_CT_ASSERT(l4proto);
9fb9cbb1	130
ea781f19	131	ret = -ENOSPC;
9fb9cbb1	132	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
5e8fbe2a PM	133	l3proto->name, nf_ct_l3num(ct),
5e8fbe2a PM	134	l4proto->name, nf_ct_protonum(ct),
c88130bc PM	135	timer_pending(&ct->timeout)
c88130bc PM	136	? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
ea781f19	137	goto release;
9fb9cbb1	138
c88130bc	139	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
ea781f19	140	goto release;
9fb9cbb1	141
c88130bc	142	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	143	l3proto, l4proto))
ea781f19	144	goto release;
9fb9cbb1	145
58401572	146	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
ea781f19	147	goto release;
9fb9cbb1	148
c88130bc	149	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
9fb9cbb1	150	if (seq_printf(s, "[UNREPLIED] "))
ea781f19	151	goto release;
9fb9cbb1	152
c88130bc	153	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	154	l3proto, l4proto))
ea781f19	155	goto release;
9fb9cbb1	156
58401572	157	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
ea781f19	158	goto release;
9fb9cbb1	159
c88130bc	160	if (test_bit(IPS_ASSURED_BIT, &ct->status))
9fb9cbb1	161	if (seq_printf(s, "[ASSURED] "))
ea781f19	162	goto release;
9fb9cbb1 YK	163
9fb9cbb1 YK	164	#if defined(CONFIG_NF_CONNTRACK_MARK)
c88130bc	165	if (seq_printf(s, "mark=%u ", ct->mark))
ea781f19	166	goto release;
9fb9cbb1 YK	167	#endif
9fb9cbb1 YK	168
7c9728c3	169	#ifdef CONFIG_NF_CONNTRACK_SECMARK
c88130bc	170	if (seq_printf(s, "secmark=%u ", ct->secmark))
ea781f19	171	goto release;
7c9728c3 JM	172	#endif
7c9728c3 JM	173
c88130bc	174	if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
ea781f19	175	goto release;
a5d29264	176
ea781f19 ED	177	ret = 0;
	178	release:
	179	nf_ct_put(ct);
9fb9cbb1 YK	180	return 0;
	181	}
	182
56b3d975	183	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	184	.start = ct_seq_start,
	185	.next = ct_seq_next,
	186	.stop = ct_seq_stop,
	187	.show = ct_seq_show
	188	};
	189
	190	static int ct_open(struct inode inode, struct file file)
	191	{
b2ce2c74	192	return seq_open_net(inode, file, &ct_seq_ops,
e2da5913	193	sizeof(struct ct_iter_state));
9fb9cbb1 YK	194	}
9fb9cbb1 YK	195
da7071d7	196	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	197	.owner = THIS_MODULE,
	198	.open = ct_open,
	199	.read = seq_read,
	200	.llseek = seq_lseek,
b2ce2c74	201	.release = seq_release_net,
9fb9cbb1 YK	202	};
9fb9cbb1 YK	203
9fb9cbb1 YK	204	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
9fb9cbb1 YK	205	{
8e9df801	206	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	207	int cpu;
	208
	209	if (*pos == 0)
	210	return SEQ_START_TOKEN;
	211
0f23174a	212	for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
9fb9cbb1 YK	213	if (!cpu_possible(cpu))
	214	continue;
	215	*pos = cpu + 1;
8e9df801	216	return per_cpu_ptr(net->ct.stat, cpu);
9fb9cbb1 YK	217	}
	218
	219	return NULL;
	220	}
	221
	222	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	223	{
8e9df801	224	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	225	int cpu;
9fb9cbb1 YK	226
0f23174a	227	for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
9fb9cbb1 YK	228	if (!cpu_possible(cpu))
	229	continue;
	230	*pos = cpu + 1;
8e9df801	231	return per_cpu_ptr(net->ct.stat, cpu);
9fb9cbb1 YK	232	}
	233
	234	return NULL;
	235	}
	236
	237	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	238	{
	239	}
	240
	241	static int ct_cpu_seq_show(struct seq_file seq, void v)
	242	{
8e9df801 AD	243	struct net *net = seq_file_net(seq);
8e9df801 AD	244	unsigned int nr_conntracks = atomic_read(&net->ct.count);
32948588	245	const struct ip_conntrack_stat *st = v;
9fb9cbb1 YK	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	{
8e9df801 AD	284	return seq_open_net(inode, file, &ct_cpu_seq_ops,
8e9df801 AD	285	sizeof(struct seq_net_private));
9fb9cbb1 YK	286	}
9fb9cbb1 YK	287
da7071d7	288	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	289	.owner = THIS_MODULE,
	290	.open = ct_cpu_seq_open,
	291	.read = seq_read,
	292	.llseek = seq_lseek,
8e9df801	293	.release = seq_release_net,
9fb9cbb1	294	};
b916f7d4	295
b2ce2c74	296	static int nf_conntrack_standalone_init_proc(struct net *net)
b916f7d4 AD	297	{
	298	struct proc_dir_entry *pde;
	299
b2ce2c74	300	pde = proc_net_fops_create(net, "nf_conntrack", 0440, &ct_file_ops);
b916f7d4 AD	301	if (!pde)
b916f7d4 AD	302	goto out_nf_conntrack;
52c0e111	303
b2ce2c74	304	pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat,
52c0e111	305	&ct_cpu_seq_fops);
b916f7d4 AD	306	if (!pde)
b916f7d4 AD	307	goto out_stat_nf_conntrack;
b916f7d4 AD	308	return 0;
	309
	310	out_stat_nf_conntrack:
b2ce2c74	311	proc_net_remove(net, "nf_conntrack");
b916f7d4 AD	312	out_nf_conntrack:
	313	return -ENOMEM;
	314	}
	315
b2ce2c74	316	static void nf_conntrack_standalone_fini_proc(struct net *net)
b916f7d4	317	{
b2ce2c74 AD	318	remove_proc_entry("nf_conntrack", net->proc_net_stat);
b2ce2c74 AD	319	proc_net_remove(net, "nf_conntrack");
b916f7d4 AD	320	}
b916f7d4 AD	321	#else
b2ce2c74	322	static int nf_conntrack_standalone_init_proc(struct net *net)
b916f7d4 AD	323	{
	324	return 0;
	325	}
	326
b2ce2c74	327	static void nf_conntrack_standalone_fini_proc(struct net *net)
b916f7d4 AD	328	{
b916f7d4 AD	329	}
9fb9cbb1 YK	330	#endif /* CONFIG_PROC_FS */
	331
	332	/* Sysctl support */
	333
	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
9714be7d	339	static struct ctl_table_header *nf_ct_netfilter_header;
9fb9cbb1 YK	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,
6d9f239a	348	.proc_handler = proc_dointvec,
9fb9cbb1 YK	349	},
	350	{
	351	.ctl_name = NET_NF_CONNTRACK_COUNT,
	352	.procname = "nf_conntrack_count",
49ac8713	353	.data = &init_net.ct.count,
9fb9cbb1 YK	354	.maxlen = sizeof(int),
9fb9cbb1 YK	355	.mode = 0444,
6d9f239a	356	.proc_handler = proc_dointvec,
9fb9cbb1 YK	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,
6d9f239a	364	.proc_handler = proc_dointvec,
9fb9cbb1	365	},
39a27a35 PM	366	{
	367	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	368	.procname = "nf_conntrack_checksum",
c04d0552	369	.data = &init_net.ct.sysctl_checksum,
39a27a35 PM	370	.maxlen = sizeof(unsigned int),
39a27a35 PM	371	.mode = 0644,
6d9f239a	372	.proc_handler = proc_dointvec,
39a27a35	373	},
9fb9cbb1 YK	374	{
	375	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	376	.procname = "nf_conntrack_log_invalid",
c2a2c7e0	377	.data = &init_net.ct.sysctl_log_invalid,
9fb9cbb1 YK	378	.maxlen = sizeof(unsigned int),
9fb9cbb1 YK	379	.mode = 0644,
6d9f239a AD	380	.proc_handler = proc_dointvec_minmax,
6d9f239a AD	381	.strategy = sysctl_intvec,
9fb9cbb1 YK	382	.extra1 = &log_invalid_proto_min,
	383	.extra2 = &log_invalid_proto_max,
	384	},
f264a7df PM	385	{
	386	.ctl_name = CTL_UNNUMBERED,
	387	.procname = "nf_conntrack_expect_max",
	388	.data = &nf_ct_expect_max,
	389	.maxlen = sizeof(int),
	390	.mode = 0644,
6d9f239a	391	.proc_handler = proc_dointvec,
f264a7df	392	},
9fb9cbb1 YK	393	{ .ctl_name = 0 }
	394	};
	395
	396	#define NET_NF_CONNTRACK_MAX 2089
	397
	398	static ctl_table nf_ct_netfilter_table[] = {
9fb9cbb1 YK	399	{
	400	.ctl_name = NET_NF_CONNTRACK_MAX,
	401	.procname = "nf_conntrack_max",
	402	.data = &nf_conntrack_max,
	403	.maxlen = sizeof(int),
	404	.mode = 0644,
6d9f239a	405	.proc_handler = proc_dointvec,
9fb9cbb1 YK	406	},
	407	{ .ctl_name = 0 }
	408	};
	409
9e232495	410	static struct ctl_path nf_ct_path[] = {
3d7cc2ba PE	411	{ .procname = "net", .ctl_name = CTL_NET, },
3d7cc2ba PE	412	{ }
9fb9cbb1	413	};
3d7cc2ba	414
80250707	415	static int nf_conntrack_standalone_init_sysctl(struct net *net)
b916f7d4	416	{
80250707 AD	417	struct ctl_table *table;
	418
	419	if (net_eq(net, &init_net)) {
	420	nf_ct_netfilter_header =
	421	register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
	422	if (!nf_ct_netfilter_header)
	423	goto out;
	424	}
	425
	426	table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
	427	GFP_KERNEL);
	428	if (!table)
	429	goto out_kmemdup;
	430
	431	table[1].data = &net->ct.count;
c04d0552	432	table[3].data = &net->ct.sysctl_checksum;
c2a2c7e0	433	table[4].data = &net->ct.sysctl_log_invalid;
80250707 AD	434
	435	net->ct.sysctl_header = register_net_sysctl_table(net,
	436	nf_net_netfilter_sysctl_path, table);
	437	if (!net->ct.sysctl_header)
9714be7d KPO	438	goto out_unregister_netfilter;
9714be7d KPO	439
b916f7d4 AD	440	return 0;
b916f7d4 AD	441
9714be7d	442	out_unregister_netfilter:
80250707 AD	443	kfree(table);
	444	out_kmemdup:
	445	if (net_eq(net, &init_net))
	446	unregister_sysctl_table(nf_ct_netfilter_header);
9714be7d KPO	447	out:
	448	printk("nf_conntrack: can't register to sysctl.\n");
	449	return -ENOMEM;
b916f7d4 AD	450	}
b916f7d4 AD	451
80250707	452	static void nf_conntrack_standalone_fini_sysctl(struct net *net)
b916f7d4	453	{
80250707 AD	454	struct ctl_table *table;
	455
	456	if (net_eq(net, &init_net))
	457	unregister_sysctl_table(nf_ct_netfilter_header);
	458	table = net->ct.sysctl_header->ctl_table_arg;
	459	unregister_net_sysctl_table(net->ct.sysctl_header);
	460	kfree(table);
b916f7d4 AD	461	}
b916f7d4 AD	462	#else
80250707	463	static int nf_conntrack_standalone_init_sysctl(struct net *net)
b916f7d4 AD	464	{
	465	return 0;
	466	}
	467
80250707	468	static void nf_conntrack_standalone_fini_sysctl(struct net *net)
b916f7d4 AD	469	{
b916f7d4 AD	470	}
9fb9cbb1 YK	471	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	472
dfdb8d79 AD	473	static int nf_conntrack_net_init(struct net *net)
dfdb8d79 AD	474	{
b2ce2c74 AD	475	int ret;
	476
	477	ret = nf_conntrack_init(net);
	478	if (ret < 0)
	479	goto out_init;
	480	ret = nf_conntrack_standalone_init_proc(net);
	481	if (ret < 0)
	482	goto out_proc;
c04d0552	483	net->ct.sysctl_checksum = 1;
c2a2c7e0	484	net->ct.sysctl_log_invalid = 0;
80250707 AD	485	ret = nf_conntrack_standalone_init_sysctl(net);
	486	if (ret < 0)
	487	goto out_sysctl;
b2ce2c74 AD	488	return 0;
b2ce2c74 AD	489
80250707 AD	490	out_sysctl:
80250707 AD	491	nf_conntrack_standalone_fini_proc(net);
b2ce2c74 AD	492	out_proc:
	493	nf_conntrack_cleanup(net);
	494	out_init:
	495	return ret;
dfdb8d79 AD	496	}
	497
	498	static void nf_conntrack_net_exit(struct net *net)
	499	{
80250707	500	nf_conntrack_standalone_fini_sysctl(net);
b2ce2c74	501	nf_conntrack_standalone_fini_proc(net);
dfdb8d79 AD	502	nf_conntrack_cleanup(net);
	503	}
	504
	505	static struct pernet_operations nf_conntrack_net_ops = {
	506	.init = nf_conntrack_net_init,
	507	.exit = nf_conntrack_net_exit,
	508	};
	509
65b4b4e8	510	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	511	{
80250707	512	return register_pernet_subsys(&nf_conntrack_net_ops);
9fb9cbb1 YK	513	}
9fb9cbb1 YK	514
65b4b4e8	515	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	516	{
dfdb8d79	517	unregister_pernet_subsys(&nf_conntrack_net_ops);
9fb9cbb1 YK	518	}
9fb9cbb1 YK	519
65b4b4e8 AM	520	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	521	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	522
	523	/* Some modules need us, but don't depend directly on any symbol.
	524	They should call this. */
2e4e6a17	525	void need_conntrack(void)
9fb9cbb1 YK	526	{
9fb9cbb1 YK	527	}
13b18339	528	EXPORT_SYMBOL_GPL(need_conntrack);