[net-next-2.6.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[] = {
	{
		.ctl_name	= NET_IPV6_ROUTE,
		.procname	= "route",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv6_route_table_template
	},
	{
		.ctl_name	= NET_IPV6_ICMP,
		.procname	= "icmp",
		.maxlen		= 0,
		.mode		= 0555,
		.child		= ipv6_icmp_table_template
	},
	{
		.ctl_name	= NET_IPV6_BINDV6ONLY,
		.procname	= "bindv6only",
		.data		= &init_net.ipv6.sysctl.bindv6only,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ .ctl_name = 0 }
};

static ctl_table ipv6_table[] = {
	{
		.ctl_name	= NET_IPV6_MLD_MAX_MSF,
		.procname	= "mld_max_msf",
		.data		= &sysctl_mld_max_msf,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ .ctl_name = 0 }
};

struct ctl_path net_ipv6_ctl_path[] = {
	{ .procname = "net", .ctl_name = CTL_NET, },
	{ .procname = "ipv6", .ctl_name = NET_IPV6, },
	{ },
};
EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);

static int 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 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_table);
	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 LT	18	{
	19	.ctl_name = NET_IPV6_ROUTE,
	20	.procname = "route",
	21	.maxlen = 0,
	22	.mode = 0555,
760f2d01	23	.child = ipv6_route_table_template
1da177e4 LT	24	},
	25	{
	26	.ctl_name = NET_IPV6_ICMP,
	27	.procname = "icmp",
	28	.maxlen = 0,
	29	.mode = 0555,
760f2d01	30	.child = ipv6_icmp_table_template
1da177e4 LT	31	},
	32	{
	33	.ctl_name = NET_IPV6_BINDV6ONLY,
	34	.procname = "bindv6only",
99bc9c4e	35	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	36	.maxlen = sizeof(int),
1da177e4 LT	37	.mode = 0644,
6d9f239a	38	.proc_handler = proc_dointvec
1da177e4	39	},
34ac2573 PE	40	{ .ctl_name = 0 }
	41	};
	42
	43	static ctl_table ipv6_table[] = {
1da177e4 LT	44	{
	45	.ctl_name = NET_IPV6_MLD_MAX_MSF,
	46	.procname = "mld_max_msf",
	47	.data = &sysctl_mld_max_msf,
	48	.maxlen = sizeof(int),
	49	.mode = 0644,
6d9f239a	50	.proc_handler = proc_dointvec
1da177e4 LT	51	},
	52	{ .ctl_name = 0 }
	53	};
	54
3d7cc2ba	55	struct ctl_path net_ipv6_ctl_path[] = {
4d43b78a PE	56	{ .procname = "net", .ctl_name = CTL_NET, },
	57	{ .procname = "ipv6", .ctl_name = NET_IPV6, },
	58	{ },
1da177e4	59	};
3d7cc2ba	60	EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
1da177e4	61
89918fc2	62	static int ipv6_sysctl_net_init(struct net *net)
1da177e4	63	{
760f2d01 DL	64	struct ctl_table *ipv6_table;
	65	struct ctl_table *ipv6_route_table;
	66	struct ctl_table *ipv6_icmp_table;
	67	int err;
	68
	69	err = -ENOMEM;
	70	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	71	GFP_KERNEL);
	72	if (!ipv6_table)
	73	goto out;
	74
	75	ipv6_route_table = ipv6_route_sysctl_init(net);
	76	if (!ipv6_route_table)
	77	goto out_ipv6_table;
5ee09105	78	ipv6_table[0].child = ipv6_route_table;
760f2d01 DL	79
	80	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	81	if (!ipv6_icmp_table)
	82	goto out_ipv6_route_table;
760f2d01 DL	83	ipv6_table[1].child = ipv6_icmp_table;
760f2d01 DL	84
99bc9c4e DL	85	ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
99bc9c4e DL	86
760f2d01 DL	87	net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
760f2d01 DL	88	ipv6_table);
760f2d01 DL	89	if (!net->ipv6.sysctl.table)
	90	goto out_ipv6_icmp_table;
	91
	92	err = 0;
	93	out:
	94	return err;
291480c0	95
760f2d01 DL	96	out_ipv6_icmp_table:
	97	kfree(ipv6_icmp_table);
	98	out_ipv6_route_table:
	99	kfree(ipv6_route_table);
	100	out_ipv6_table:
	101	kfree(ipv6_table);
	102	goto out;
1da177e4 LT	103	}
1da177e4 LT	104
89918fc2 DL	105	static void ipv6_sysctl_net_exit(struct net *net)
89918fc2 DL	106	{
760f2d01 DL	107	struct ctl_table *ipv6_table;
	108	struct ctl_table *ipv6_route_table;
	109	struct ctl_table *ipv6_icmp_table;
	110
	111	ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
	112	ipv6_route_table = ipv6_table[0].child;
	113	ipv6_icmp_table = ipv6_table[1].child;
	114
	115	unregister_net_sysctl_table(net->ipv6.sysctl.table);
	116
	117	kfree(ipv6_table);
	118	kfree(ipv6_route_table);
	119	kfree(ipv6_icmp_table);
89918fc2 DL	120	}
	121
	122	static struct pernet_operations ipv6_sysctl_net_ops = {
	123	.init = ipv6_sysctl_net_init,
	124	.exit = ipv6_sysctl_net_exit,
	125	};
	126
34ac2573 PE	127	static struct ctl_table_header *ip6_header;
34ac2573 PE	128
89918fc2 DL	129	int ipv6_sysctl_register(void)
89918fc2 DL	130	{
c19a28e1	131	int err = -ENOMEM;
34ac2573 PE	132
	133	ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_table);
	134	if (ip6_header == NULL)
	135	goto out;
	136
	137	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	138	if (err)
	139	goto err_pernet;
	140	out:
	141	return err;
	142
	143	err_pernet:
	144	unregister_net_sysctl_table(ip6_header);
	145	goto out;
89918fc2 DL	146	}
89918fc2 DL	147
1da177e4 LT	148	void ipv6_sysctl_unregister(void)
1da177e4 LT	149	{
34ac2573	150	unregister_net_sysctl_table(ip6_header);
89918fc2	151	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	152	}
eeb61f71 AV	153
	154	static struct ctl_table_header *ip6_base;
	155
	156	int ipv6_static_sysctl_register(void)
	157	{
	158	static struct ctl_table empty[1];
ce3113ec	159	ip6_base = register_sysctl_paths(net_ipv6_ctl_path, empty);
eeb61f71 AV	160	if (ip6_base == NULL)
	161	return -ENOMEM;
	162	return 0;
	163	}
	164
	165	void ipv6_static_sysctl_unregister(void)
	166	{
	167	unregister_net_sysctl_table(ip6_base);
	168	}