[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 <linux/slab.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>
1da177e4 LT	11	#include <linux/ipv6.h>
5a0e3ad6	12	#include <linux/slab.h>
1da177e4 LT	13	#include <net/ndisc.h>
	14	#include <net/ipv6.h>
	15	#include <net/addrconf.h>
04128f23	16	#include <net/inet_frag.h>
1da177e4	17
760f2d01	18	static ctl_table ipv6_table_template[] = {
1da177e4	19	{
1da177e4 LT	20	.procname = "route",
	21	.maxlen = 0,
	22	.mode = 0555,
760f2d01	23	.child = ipv6_route_table_template
1da177e4 LT	24	},
1da177e4 LT	25	{
1da177e4 LT	26	.procname = "icmp",
	27	.maxlen = 0,
	28	.mode = 0555,
760f2d01	29	.child = ipv6_icmp_table_template
1da177e4 LT	30	},
1da177e4 LT	31	{
1da177e4	32	.procname = "bindv6only",
99bc9c4e	33	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	34	.maxlen = sizeof(int),
1da177e4 LT	35	.mode = 0644,
6d9f239a	36	.proc_handler = proc_dointvec
1da177e4	37	},
f8572d8f	38	{ }
34ac2573 PE	39	};
34ac2573 PE	40
81e43213	41	static ctl_table ipv6_rotable[] = {
1da177e4	42	{
1da177e4 LT	43	.procname = "mld_max_msf",
	44	.data = &sysctl_mld_max_msf,
	45	.maxlen = sizeof(int),
	46	.mode = 0644,
6d9f239a	47	.proc_handler = proc_dointvec
1da177e4	48	},
f8572d8f	49	{ }
1da177e4 LT	50	};
1da177e4 LT	51
3d7cc2ba	52	struct ctl_path net_ipv6_ctl_path[] = {
f8572d8f EB	53	{ .procname = "net", },
f8572d8f EB	54	{ .procname = "ipv6", },
4d43b78a	55	{ },
1da177e4	56	};
3d7cc2ba	57	EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
1da177e4	58
2c8c1e72	59	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	60	{
760f2d01 DL	61	struct ctl_table *ipv6_table;
	62	struct ctl_table *ipv6_route_table;
	63	struct ctl_table *ipv6_icmp_table;
	64	int err;
	65
	66	err = -ENOMEM;
	67	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	68	GFP_KERNEL);
	69	if (!ipv6_table)
	70	goto out;
	71
	72	ipv6_route_table = ipv6_route_sysctl_init(net);
	73	if (!ipv6_route_table)
	74	goto out_ipv6_table;
5ee09105	75	ipv6_table[0].child = ipv6_route_table;
760f2d01 DL	76
	77	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	78	if (!ipv6_icmp_table)
	79	goto out_ipv6_route_table;
760f2d01 DL	80	ipv6_table[1].child = ipv6_icmp_table;
760f2d01 DL	81
99bc9c4e DL	82	ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
99bc9c4e DL	83
760f2d01 DL	84	net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
760f2d01 DL	85	ipv6_table);
760f2d01 DL	86	if (!net->ipv6.sysctl.table)
	87	goto out_ipv6_icmp_table;
	88
	89	err = 0;
	90	out:
	91	return err;
291480c0	92
760f2d01 DL	93	out_ipv6_icmp_table:
	94	kfree(ipv6_icmp_table);
	95	out_ipv6_route_table:
	96	kfree(ipv6_route_table);
	97	out_ipv6_table:
	98	kfree(ipv6_table);
	99	goto out;
1da177e4 LT	100	}
1da177e4 LT	101
2c8c1e72	102	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	103	{
760f2d01 DL	104	struct ctl_table *ipv6_table;
	105	struct ctl_table *ipv6_route_table;
	106	struct ctl_table *ipv6_icmp_table;
	107
	108	ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
	109	ipv6_route_table = ipv6_table[0].child;
	110	ipv6_icmp_table = ipv6_table[1].child;
	111
	112	unregister_net_sysctl_table(net->ipv6.sysctl.table);
	113
	114	kfree(ipv6_table);
	115	kfree(ipv6_route_table);
	116	kfree(ipv6_icmp_table);
89918fc2 DL	117	}
	118
	119	static struct pernet_operations ipv6_sysctl_net_ops = {
	120	.init = ipv6_sysctl_net_init,
	121	.exit = ipv6_sysctl_net_exit,
	122	};
	123
34ac2573 PE	124	static struct ctl_table_header *ip6_header;
34ac2573 PE	125
89918fc2 DL	126	int ipv6_sysctl_register(void)
89918fc2 DL	127	{
c19a28e1	128	int err = -ENOMEM;
34ac2573	129
81e43213	130	ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
34ac2573 PE	131	if (ip6_header == NULL)
	132	goto out;
	133
	134	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	135	if (err)
	136	goto err_pernet;
	137	out:
	138	return err;
	139
	140	err_pernet:
	141	unregister_net_sysctl_table(ip6_header);
	142	goto out;
89918fc2 DL	143	}
89918fc2 DL	144
1da177e4 LT	145	void ipv6_sysctl_unregister(void)
1da177e4 LT	146	{
34ac2573	147	unregister_net_sysctl_table(ip6_header);
89918fc2	148	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	149	}
eeb61f71 AV	150
	151	static struct ctl_table_header *ip6_base;
	152
	153	int ipv6_static_sysctl_register(void)
	154	{
	155	static struct ctl_table empty[1];
ce3113ec	156	ip6_base = register_sysctl_paths(net_ipv6_ctl_path, empty);
eeb61f71 AV	157	if (ip6_base == NULL)
	158	return -ENOMEM;
	159	return 0;
	160	}
	161
	162	void ipv6_static_sysctl_unregister(void)
	163	{
	164	unregister_net_sysctl_table(ip6_base);
	165	}