[GitHub/mt8127/android_kernel_alcatel_ttab.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>
#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_node *ct_get_first(struct seq_file *seq)
{
	struct net *net = seq_file_net(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(net->ct.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 net *net = seq_file_net(seq);
	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(net->ct.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(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);

	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)
		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_acct(s, ct, 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_acct(s, ct, 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_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_CPUS; ++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_CPUS; ++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 */

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_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		= &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_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(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;

	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;
	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 <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>
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
f205c5e0	47	static struct hlist_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;
76507f69	51	struct hlist_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);
76507f69 PM	57	if (n)
76507f69 PM	58	return n;
9fb9cbb1 YK	59	}
	60	return NULL;
	61	}
	62
f205c5e0 PM	63	static struct hlist_node ct_get_next(struct seq_file seq,
f205c5e0 PM	64	struct hlist_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);
f205c5e0	70	while (head == NULL) {
9fb9cbb1 YK	71	if (++st->bucket >= nf_conntrack_htable_size)
9fb9cbb1 YK	72	return NULL;
b2ce2c74	73	head = rcu_dereference(net->ct.hash[st->bucket].first);
9fb9cbb1 YK	74	}
	75	return head;
	76	}
	77
f205c5e0	78	static struct hlist_node ct_get_idx(struct seq_file seq, loff_t pos)
9fb9cbb1	79	{
f205c5e0	80	struct hlist_node *head = ct_get_first(seq);
9fb9cbb1 YK	81
	82	if (head)
	83	while (pos && (head = ct_get_next(seq, head)))
	84	pos--;
	85	return pos ? NULL : head;
	86	}
	87
	88	static void ct_seq_start(struct seq_file seq, loff_t *pos)
76507f69	89	__acquires(RCU)
9fb9cbb1	90	{
76507f69	91	rcu_read_lock();
9fb9cbb1 YK	92	return ct_get_idx(seq, *pos);
	93	}
	94
	95	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	96	{
	97	(*pos)++;
	98	return ct_get_next(s, v);
	99	}
	100
	101	static void ct_seq_stop(struct seq_file s, void v)
76507f69	102	__releases(RCU)
9fb9cbb1	103	{
76507f69	104	rcu_read_unlock();
9fb9cbb1 YK	105	}
	106
	107	/* return 0 on success, 1 in case of error */
	108	static int ct_seq_show(struct seq_file s, void v)
	109	{
	110	const struct nf_conntrack_tuple_hash *hash = v;
c88130bc	111	const struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
32948588 JE	112	const struct nf_conntrack_l3proto *l3proto;
32948588 JE	113	const struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	114
c88130bc	115	NF_CT_ASSERT(ct);
9fb9cbb1 YK	116
	117	/* we only want to print DIR_ORIGINAL */
	118	if (NF_CT_DIRECTION(hash))
	119	return 0;
	120
5e8fbe2a	121	l3proto = __nf_ct_l3proto_find(nf_ct_l3num(ct));
9fb9cbb1	122	NF_CT_ASSERT(l3proto);
5e8fbe2a	123	l4proto = __nf_ct_l4proto_find(nf_ct_l3num(ct), nf_ct_protonum(ct));
605dcad6	124	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	125
9fb9cbb1 YK	126	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
5e8fbe2a PM	127	l3proto->name, nf_ct_l3num(ct),
5e8fbe2a PM	128	l4proto->name, nf_ct_protonum(ct),
c88130bc PM	129	timer_pending(&ct->timeout)
c88130bc PM	130	? (long)(ct->timeout.expires - jiffies)/HZ : 0) != 0)
9fb9cbb1 YK	131	return -ENOSPC;
9fb9cbb1 YK	132
c88130bc	133	if (l4proto->print_conntrack && l4proto->print_conntrack(s, ct))
9fb9cbb1 YK	134	return -ENOSPC;
9fb9cbb1 YK	135
c88130bc	136	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	137	l3proto, l4proto))
9fb9cbb1 YK	138	return -ENOSPC;
9fb9cbb1 YK	139
58401572	140	if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
9fb9cbb1 YK	141	return -ENOSPC;
9fb9cbb1 YK	142
c88130bc	143	if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
9fb9cbb1 YK	144	if (seq_printf(s, "[UNREPLIED] "))
	145	return -ENOSPC;
	146
c88130bc	147	if (print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	148	l3proto, l4proto))
9fb9cbb1 YK	149	return -ENOSPC;
9fb9cbb1 YK	150
58401572	151	if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
9fb9cbb1 YK	152	return -ENOSPC;
9fb9cbb1 YK	153
c88130bc	154	if (test_bit(IPS_ASSURED_BIT, &ct->status))
9fb9cbb1 YK	155	if (seq_printf(s, "[ASSURED] "))
	156	return -ENOSPC;
	157
	158	#if defined(CONFIG_NF_CONNTRACK_MARK)
c88130bc	159	if (seq_printf(s, "mark=%u ", ct->mark))
9fb9cbb1 YK	160	return -ENOSPC;
	161	#endif
	162
7c9728c3	163	#ifdef CONFIG_NF_CONNTRACK_SECMARK
c88130bc	164	if (seq_printf(s, "secmark=%u ", ct->secmark))
7c9728c3 JM	165	return -ENOSPC;
	166	#endif
	167
c88130bc	168	if (seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use)))
9fb9cbb1	169	return -ENOSPC;
a5d29264	170
9fb9cbb1 YK	171	return 0;
	172	}
	173
56b3d975	174	static const struct seq_operations ct_seq_ops = {
9fb9cbb1 YK	175	.start = ct_seq_start,
	176	.next = ct_seq_next,
	177	.stop = ct_seq_stop,
	178	.show = ct_seq_show
	179	};
	180
	181	static int ct_open(struct inode inode, struct file file)
	182	{
b2ce2c74	183	return seq_open_net(inode, file, &ct_seq_ops,
e2da5913	184	sizeof(struct ct_iter_state));
9fb9cbb1 YK	185	}
9fb9cbb1 YK	186
da7071d7	187	static const struct file_operations ct_file_ops = {
9fb9cbb1 YK	188	.owner = THIS_MODULE,
	189	.open = ct_open,
	190	.read = seq_read,
	191	.llseek = seq_lseek,
b2ce2c74	192	.release = seq_release_net,
9fb9cbb1 YK	193	};
9fb9cbb1 YK	194
9fb9cbb1 YK	195	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
9fb9cbb1 YK	196	{
8e9df801	197	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	198	int cpu;
	199
	200	if (*pos == 0)
	201	return SEQ_START_TOKEN;
	202
	203	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	204	if (!cpu_possible(cpu))
	205	continue;
	206	*pos = cpu + 1;
8e9df801	207	return per_cpu_ptr(net->ct.stat, cpu);
9fb9cbb1 YK	208	}
	209
	210	return NULL;
	211	}
	212
	213	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	214	{
8e9df801	215	struct net *net = seq_file_net(seq);
9fb9cbb1 YK	216	int cpu;
	217
	218	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	219	if (!cpu_possible(cpu))
	220	continue;
	221	*pos = cpu + 1;
8e9df801	222	return per_cpu_ptr(net->ct.stat, cpu);
9fb9cbb1 YK	223	}
	224
	225	return NULL;
	226	}
	227
	228	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	229	{
	230	}
	231
	232	static int ct_cpu_seq_show(struct seq_file seq, void v)
	233	{
8e9df801 AD	234	struct net *net = seq_file_net(seq);
8e9df801 AD	235	unsigned int nr_conntracks = atomic_read(&net->ct.count);
32948588	236	const struct ip_conntrack_stat *st = v;
9fb9cbb1 YK	237
	238	if (v == SEQ_START_TOKEN) {
	239	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");
	240	return 0;
	241	}
	242
	243	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	244	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	245	nr_conntracks,
	246	st->searched,
	247	st->found,
	248	st->new,
	249	st->invalid,
	250	st->ignore,
	251	st->delete,
	252	st->delete_list,
	253	st->insert,
	254	st->insert_failed,
	255	st->drop,
	256	st->early_drop,
	257	st->error,
	258
	259	st->expect_new,
	260	st->expect_create,
	261	st->expect_delete
	262	);
	263	return 0;
	264	}
	265
56b3d975	266	static const struct seq_operations ct_cpu_seq_ops = {
9fb9cbb1 YK	267	.start = ct_cpu_seq_start,
	268	.next = ct_cpu_seq_next,
	269	.stop = ct_cpu_seq_stop,
	270	.show = ct_cpu_seq_show,
	271	};
	272
	273	static int ct_cpu_seq_open(struct inode inode, struct file file)
	274	{
8e9df801 AD	275	return seq_open_net(inode, file, &ct_cpu_seq_ops,
8e9df801 AD	276	sizeof(struct seq_net_private));
9fb9cbb1 YK	277	}
9fb9cbb1 YK	278
da7071d7	279	static const struct file_operations ct_cpu_seq_fops = {
9fb9cbb1 YK	280	.owner = THIS_MODULE,
	281	.open = ct_cpu_seq_open,
	282	.read = seq_read,
	283	.llseek = seq_lseek,
8e9df801	284	.release = seq_release_net,
9fb9cbb1	285	};
b916f7d4	286
b2ce2c74	287	static int nf_conntrack_standalone_init_proc(struct net *net)
b916f7d4 AD	288	{
	289	struct proc_dir_entry *pde;
	290
b2ce2c74	291	pde = proc_net_fops_create(net, "nf_conntrack", 0440, &ct_file_ops);
b916f7d4 AD	292	if (!pde)
b916f7d4 AD	293	goto out_nf_conntrack;
52c0e111	294
b2ce2c74	295	pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat,
52c0e111	296	&ct_cpu_seq_fops);
b916f7d4 AD	297	if (!pde)
b916f7d4 AD	298	goto out_stat_nf_conntrack;
b916f7d4 AD	299	return 0;
	300
	301	out_stat_nf_conntrack:
b2ce2c74	302	proc_net_remove(net, "nf_conntrack");
b916f7d4 AD	303	out_nf_conntrack:
	304	return -ENOMEM;
	305	}
	306
b2ce2c74	307	static void nf_conntrack_standalone_fini_proc(struct net *net)
b916f7d4	308	{
b2ce2c74 AD	309	remove_proc_entry("nf_conntrack", net->proc_net_stat);
b2ce2c74 AD	310	proc_net_remove(net, "nf_conntrack");
b916f7d4 AD	311	}
b916f7d4 AD	312	#else
b2ce2c74	313	static int nf_conntrack_standalone_init_proc(struct net *net)
b916f7d4 AD	314	{
	315	return 0;
	316	}
	317
b2ce2c74	318	static void nf_conntrack_standalone_fini_proc(struct net *net)
b916f7d4 AD	319	{
b916f7d4 AD	320	}
9fb9cbb1 YK	321	#endif /* CONFIG_PROC_FS */
	322
	323	/* Sysctl support */
	324
94aec08e	325	int nf_conntrack_checksum __read_mostly = 1;
13b18339	326	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
72b55823	327
9fb9cbb1	328	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	329	/* Log invalid packets of a given protocol */
	330	static int log_invalid_proto_min = 0;
	331	static int log_invalid_proto_max = 255;
	332
9714be7d	333	static struct ctl_table_header *nf_ct_netfilter_header;
9fb9cbb1 YK	334
	335	static ctl_table nf_ct_sysctl_table[] = {
	336	{
	337	.ctl_name = NET_NF_CONNTRACK_MAX,
	338	.procname = "nf_conntrack_max",
	339	.data = &nf_conntrack_max,
	340	.maxlen = sizeof(int),
	341	.mode = 0644,
	342	.proc_handler = &proc_dointvec,
	343	},
	344	{
	345	.ctl_name = NET_NF_CONNTRACK_COUNT,
	346	.procname = "nf_conntrack_count",
49ac8713	347	.data = &init_net.ct.count,
9fb9cbb1 YK	348	.maxlen = sizeof(int),
	349	.mode = 0444,
	350	.proc_handler = &proc_dointvec,
	351	},
	352	{
	353	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	354	.procname = "nf_conntrack_buckets",
	355	.data = &nf_conntrack_htable_size,
	356	.maxlen = sizeof(unsigned int),
	357	.mode = 0444,
	358	.proc_handler = &proc_dointvec,
	359	},
39a27a35 PM	360	{
	361	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	362	.procname = "nf_conntrack_checksum",
	363	.data = &nf_conntrack_checksum,
	364	.maxlen = sizeof(unsigned int),
	365	.mode = 0644,
	366	.proc_handler = &proc_dointvec,
	367	},
9fb9cbb1 YK	368	{
	369	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	370	.procname = "nf_conntrack_log_invalid",
	371	.data = &nf_ct_log_invalid,
	372	.maxlen = sizeof(unsigned int),
	373	.mode = 0644,
	374	.proc_handler = &proc_dointvec_minmax,
	375	.strategy = &sysctl_intvec,
	376	.extra1 = &log_invalid_proto_min,
	377	.extra2 = &log_invalid_proto_max,
	378	},
f264a7df PM	379	{
	380	.ctl_name = CTL_UNNUMBERED,
	381	.procname = "nf_conntrack_expect_max",
	382	.data = &nf_ct_expect_max,
	383	.maxlen = sizeof(int),
	384	.mode = 0644,
	385	.proc_handler = &proc_dointvec,
	386	},
9fb9cbb1 YK	387	{ .ctl_name = 0 }
	388	};
	389
	390	#define NET_NF_CONNTRACK_MAX 2089
	391
	392	static ctl_table nf_ct_netfilter_table[] = {
9fb9cbb1 YK	393	{
	394	.ctl_name = NET_NF_CONNTRACK_MAX,
	395	.procname = "nf_conntrack_max",
	396	.data = &nf_conntrack_max,
	397	.maxlen = sizeof(int),
	398	.mode = 0644,
	399	.proc_handler = &proc_dointvec,
	400	},
	401	{ .ctl_name = 0 }
	402	};
	403
9e232495	404	static struct ctl_path nf_ct_path[] = {
3d7cc2ba PE	405	{ .procname = "net", .ctl_name = CTL_NET, },
3d7cc2ba PE	406	{ }
9fb9cbb1	407	};
3d7cc2ba	408
13b18339	409	EXPORT_SYMBOL_GPL(nf_ct_log_invalid);
b916f7d4	410
80250707	411	static int nf_conntrack_standalone_init_sysctl(struct net *net)
b916f7d4	412	{
80250707 AD	413	struct ctl_table *table;
	414
	415	if (net_eq(net, &init_net)) {
	416	nf_ct_netfilter_header =
	417	register_sysctl_paths(nf_ct_path, nf_ct_netfilter_table);
	418	if (!nf_ct_netfilter_header)
	419	goto out;
	420	}
	421
	422	table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
	423	GFP_KERNEL);
	424	if (!table)
	425	goto out_kmemdup;
	426
	427	table[1].data = &net->ct.count;
	428
	429	net->ct.sysctl_header = register_net_sysctl_table(net,
	430	nf_net_netfilter_sysctl_path, table);
	431	if (!net->ct.sysctl_header)
9714be7d KPO	432	goto out_unregister_netfilter;
9714be7d KPO	433
b916f7d4 AD	434	return 0;
b916f7d4 AD	435
9714be7d	436	out_unregister_netfilter:
80250707 AD	437	kfree(table);
	438	out_kmemdup:
	439	if (net_eq(net, &init_net))
	440	unregister_sysctl_table(nf_ct_netfilter_header);
9714be7d KPO	441	out:
	442	printk("nf_conntrack: can't register to sysctl.\n");
	443	return -ENOMEM;
b916f7d4 AD	444	}
b916f7d4 AD	445
80250707	446	static void nf_conntrack_standalone_fini_sysctl(struct net *net)
b916f7d4	447	{
80250707 AD	448	struct ctl_table *table;
	449
	450	if (net_eq(net, &init_net))
	451	unregister_sysctl_table(nf_ct_netfilter_header);
	452	table = net->ct.sysctl_header->ctl_table_arg;
	453	unregister_net_sysctl_table(net->ct.sysctl_header);
	454	kfree(table);
b916f7d4 AD	455	}
b916f7d4 AD	456	#else
80250707	457	static int nf_conntrack_standalone_init_sysctl(struct net *net)
b916f7d4 AD	458	{
	459	return 0;
	460	}
	461
80250707	462	static void nf_conntrack_standalone_fini_sysctl(struct net *net)
b916f7d4 AD	463	{
b916f7d4 AD	464	}
9fb9cbb1 YK	465	#endif /* CONFIG_SYSCTL */
9fb9cbb1 YK	466
dfdb8d79 AD	467	static int nf_conntrack_net_init(struct net *net)
dfdb8d79 AD	468	{
b2ce2c74 AD	469	int ret;
	470
	471	ret = nf_conntrack_init(net);
	472	if (ret < 0)
	473	goto out_init;
	474	ret = nf_conntrack_standalone_init_proc(net);
	475	if (ret < 0)
	476	goto out_proc;
80250707 AD	477	ret = nf_conntrack_standalone_init_sysctl(net);
	478	if (ret < 0)
	479	goto out_sysctl;
b2ce2c74 AD	480	return 0;
b2ce2c74 AD	481
80250707 AD	482	out_sysctl:
80250707 AD	483	nf_conntrack_standalone_fini_proc(net);
b2ce2c74 AD	484	out_proc:
	485	nf_conntrack_cleanup(net);
	486	out_init:
	487	return ret;
dfdb8d79 AD	488	}
	489
	490	static void nf_conntrack_net_exit(struct net *net)
	491	{
80250707	492	nf_conntrack_standalone_fini_sysctl(net);
b2ce2c74	493	nf_conntrack_standalone_fini_proc(net);
dfdb8d79 AD	494	nf_conntrack_cleanup(net);
	495	}
	496
	497	static struct pernet_operations nf_conntrack_net_ops = {
	498	.init = nf_conntrack_net_init,
	499	.exit = nf_conntrack_net_exit,
	500	};
	501
65b4b4e8	502	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	503	{
80250707	504	return register_pernet_subsys(&nf_conntrack_net_ops);
9fb9cbb1 YK	505	}
9fb9cbb1 YK	506
65b4b4e8	507	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	508	{
dfdb8d79	509	unregister_pernet_subsys(&nf_conntrack_net_ops);
9fb9cbb1 YK	510	}
9fb9cbb1 YK	511
65b4b4e8 AM	512	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	513	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	514
	515	/* Some modules need us, but don't depend directly on any symbol.
	516	They should call this. */
2e4e6a17	517	void need_conntrack(void)
9fb9cbb1 YK	518	{
9fb9cbb1 YK	519	}
13b18339	520	EXPORT_SYMBOL_GPL(need_conntrack);