[linux-2.6-block.git] / net / ipv6 / sysctl_net_ipv6.c

/*
 * sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
 *
 * Changes:
 * YOSHIFUJI Hideaki @USAGI:	added icmp sysctl table.
 */

#include <linux/mm.h>
#include <linux/sysctl.h>
#include <linux/in6.h>
#include <linux/ipv6.h>
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <net/inet_frag.h>

static ctl_table ipv6_table_template[] = {
	{
		.procname	= "route",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv6_route_table_template
	},
	{
		.procname	= "icmp",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv6_icmp_table_template
	},
	{
		.procname	= "bindv6only",
		.data		= &init_net.ipv6.sysctl.bindv6only,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ }
};

static ctl_table ipv6_rotable[] = {
	{
		.procname	= "mld_max_msf",
		.data		= &sysctl_mld_max_msf,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ }
};

struct ctl_path net_ipv6_ctl_path[] = {
	{ .procname = "net", },
	{ .procname = "ipv6", },
	{ },
};
EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);

static int __net_init ipv6_sysctl_net_init(struct net *net)
{
	struct ctl_table *ipv6_table;
	struct ctl_table *ipv6_route_table;
	struct ctl_table *ipv6_icmp_table;
	int err;

	err = -ENOMEM;
	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
			     GFP_KERNEL);
	if (!ipv6_table)
		goto out;

	ipv6_route_table = ipv6_route_sysctl_init(net);
	if (!ipv6_route_table)
		goto out_ipv6_table;
	ipv6_table[0].child = ipv6_route_table;

	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	if (!ipv6_icmp_table)
		goto out_ipv6_route_table;
	ipv6_table[1].child = ipv6_icmp_table;

	ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;

	net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
							   ipv6_table);
	if (!net->ipv6.sysctl.table)
		goto out_ipv6_icmp_table;

	err = 0;
out:
	return err;

out_ipv6_icmp_table:
	kfree(ipv6_icmp_table);
out_ipv6_route_table:
	kfree(ipv6_route_table);
out_ipv6_table:
	kfree(ipv6_table);
	goto out;
}

static void __net_exit ipv6_sysctl_net_exit(struct net *net)
{
	struct ctl_table *ipv6_table;
	struct ctl_table *ipv6_route_table;
	struct ctl_table *ipv6_icmp_table;

	ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
	ipv6_route_table = ipv6_table[0].child;
	ipv6_icmp_table = ipv6_table[1].child;

	unregister_net_sysctl_table(net->ipv6.sysctl.table);

	kfree(ipv6_table);
	kfree(ipv6_route_table);
	kfree(ipv6_icmp_table);
}

static struct pernet_operations ipv6_sysctl_net_ops = {
	.init = ipv6_sysctl_net_init,
	.exit = ipv6_sysctl_net_exit,
};

static struct ctl_table_header *ip6_header;

int ipv6_sysctl_register(void)
{
	int err = -ENOMEM;

	ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
	if (ip6_header == NULL)
		goto out;

	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	if (err)
		goto err_pernet;
out:
	return err;

err_pernet:
	unregister_net_sysctl_table(ip6_header);
	goto out;
}

void ipv6_sysctl_unregister(void)
{
	unregister_net_sysctl_table(ip6_header);
	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
}

static struct ctl_table_header *ip6_base;

int ipv6_static_sysctl_register(void)
{
	static struct ctl_table empty[1];
	ip6_base = register_sysctl_paths(net_ipv6_ctl_path, empty);
	if (ip6_base == NULL)
		return -ENOMEM;
	return 0;
}

void ipv6_static_sysctl_unregister(void)
{
	unregister_net_sysctl_table(ip6_base);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
	3	*
	4	* Changes:
	5	* YOSHIFUJI Hideaki @USAGI: added icmp sysctl table.
	6	*/
	7
	8	#include <linux/mm.h>
	9	#include <linux/sysctl.h>
1da177e4 LT	10	#include <linux/in6.h>
	11	#include <linux/ipv6.h>
	12	#include <net/ndisc.h>
	13	#include <net/ipv6.h>
	14	#include <net/addrconf.h>
04128f23	15	#include <net/inet_frag.h>
1da177e4	16
760f2d01	17	static ctl_table ipv6_table_template[] = {
1da177e4	18	{
1da177e4 LT	19	.procname = "route",
	20	.maxlen = 0,
	21	.mode = 0555,
760f2d01	22	.child = ipv6_route_table_template
1da177e4 LT	23	},
1da177e4 LT	24	{
1da177e4 LT	25	.procname = "icmp",
	26	.maxlen = 0,
	27	.mode = 0555,
760f2d01	28	.child = ipv6_icmp_table_template
1da177e4 LT	29	},
1da177e4 LT	30	{
1da177e4	31	.procname = "bindv6only",
99bc9c4e	32	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	33	.maxlen = sizeof(int),
1da177e4 LT	34	.mode = 0644,
6d9f239a	35	.proc_handler = proc_dointvec
1da177e4	36	},
f8572d8f	37	{ }
34ac2573 PE	38	};
34ac2573 PE	39
81e43213	40	static ctl_table ipv6_rotable[] = {
1da177e4	41	{
1da177e4 LT	42	.procname = "mld_max_msf",
	43	.data = &sysctl_mld_max_msf,
	44	.maxlen = sizeof(int),
	45	.mode = 0644,
6d9f239a	46	.proc_handler = proc_dointvec
1da177e4	47	},
f8572d8f	48	{ }
1da177e4 LT	49	};
1da177e4 LT	50
3d7cc2ba	51	struct ctl_path net_ipv6_ctl_path[] = {
f8572d8f EB	52	{ .procname = "net", },
f8572d8f EB	53	{ .procname = "ipv6", },
4d43b78a	54	{ },
1da177e4	55	};
3d7cc2ba	56	EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
1da177e4	57
2c8c1e72	58	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	59	{
760f2d01 DL	60	struct ctl_table *ipv6_table;
	61	struct ctl_table *ipv6_route_table;
	62	struct ctl_table *ipv6_icmp_table;
	63	int err;
	64
	65	err = -ENOMEM;
	66	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	67	GFP_KERNEL);
	68	if (!ipv6_table)
	69	goto out;
	70
	71	ipv6_route_table = ipv6_route_sysctl_init(net);
	72	if (!ipv6_route_table)
	73	goto out_ipv6_table;
5ee09105	74	ipv6_table[0].child = ipv6_route_table;
760f2d01 DL	75
	76	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	77	if (!ipv6_icmp_table)
	78	goto out_ipv6_route_table;
760f2d01 DL	79	ipv6_table[1].child = ipv6_icmp_table;
760f2d01 DL	80
99bc9c4e DL	81	ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
99bc9c4e DL	82
760f2d01 DL	83	net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
760f2d01 DL	84	ipv6_table);
760f2d01 DL	85	if (!net->ipv6.sysctl.table)
	86	goto out_ipv6_icmp_table;
	87
	88	err = 0;
	89	out:
	90	return err;
291480c0	91
760f2d01 DL	92	out_ipv6_icmp_table:
	93	kfree(ipv6_icmp_table);
	94	out_ipv6_route_table:
	95	kfree(ipv6_route_table);
	96	out_ipv6_table:
	97	kfree(ipv6_table);
	98	goto out;
1da177e4 LT	99	}
1da177e4 LT	100
2c8c1e72	101	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	102	{
760f2d01 DL	103	struct ctl_table *ipv6_table;
	104	struct ctl_table *ipv6_route_table;
	105	struct ctl_table *ipv6_icmp_table;
	106
	107	ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
	108	ipv6_route_table = ipv6_table[0].child;
	109	ipv6_icmp_table = ipv6_table[1].child;
	110
	111	unregister_net_sysctl_table(net->ipv6.sysctl.table);
	112
	113	kfree(ipv6_table);
	114	kfree(ipv6_route_table);
	115	kfree(ipv6_icmp_table);
89918fc2 DL	116	}
	117
	118	static struct pernet_operations ipv6_sysctl_net_ops = {
	119	.init = ipv6_sysctl_net_init,
	120	.exit = ipv6_sysctl_net_exit,
	121	};
	122
34ac2573 PE	123	static struct ctl_table_header *ip6_header;
34ac2573 PE	124
89918fc2 DL	125	int ipv6_sysctl_register(void)
89918fc2 DL	126	{
c19a28e1	127	int err = -ENOMEM;
34ac2573	128
81e43213	129	ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
34ac2573 PE	130	if (ip6_header == NULL)
	131	goto out;
	132
	133	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	134	if (err)
	135	goto err_pernet;
	136	out:
	137	return err;
	138
	139	err_pernet:
	140	unregister_net_sysctl_table(ip6_header);
	141	goto out;
89918fc2 DL	142	}
89918fc2 DL	143
1da177e4 LT	144	void ipv6_sysctl_unregister(void)
1da177e4 LT	145	{
34ac2573	146	unregister_net_sysctl_table(ip6_header);
89918fc2	147	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	148	}
eeb61f71 AV	149
	150	static struct ctl_table_header *ip6_base;
	151
	152	int ipv6_static_sysctl_register(void)
	153	{
	154	static struct ctl_table empty[1];
ce3113ec	155	ip6_base = register_sysctl_paths(net_ipv6_ctl_path, empty);
eeb61f71 AV	156	if (ip6_base == NULL)
	157	return -ENOMEM;
	158	return 0;
	159	}
	160
	161	void ipv6_static_sysctl_unregister(void)
	162	{
	163	unregister_net_sysctl_table(ip6_base);
	164	}