[GitHub/mt8127/android_kernel_alcatel_ttab.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 <linux/export.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	= "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
	},
	{ }
};

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_table[0].data = &net->ipv6.sysctl.bindv6only;

	ipv6_route_table = ipv6_route_sysctl_init(net);
	if (!ipv6_route_table)
		goto out_ipv6_table;

	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	if (!ipv6_icmp_table)
		goto out_ipv6_route_table;

	net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
	if (!net->ipv6.sysctl.hdr)
		goto out_ipv6_icmp_table;

	net->ipv6.sysctl.route_hdr =
		register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
	if (!net->ipv6.sysctl.route_hdr)
		goto out_unregister_ipv6_table;

	net->ipv6.sysctl.icmp_hdr =
		register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
	if (!net->ipv6.sysctl.icmp_hdr)
		goto out_unregister_route_table;

	err = 0;
out:
	return err;
out_unregister_route_table:
	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
out_unregister_ipv6_table:
	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
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.hdr->ctl_table_arg;
	ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
	ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;

	unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);

	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(&init_net, "net/ipv6", 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);
}
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>
bc3b2d7f	13	#include <linux/export.h>
1da177e4 LT	14	#include <net/ndisc.h>
	15	#include <net/ipv6.h>
	16	#include <net/addrconf.h>
04128f23	17	#include <net/inet_frag.h>
1da177e4	18
760f2d01	19	static ctl_table ipv6_table_template[] = {
1da177e4	20	{
1da177e4	21	.procname = "bindv6only",
99bc9c4e	22	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	23	.maxlen = sizeof(int),
1da177e4 LT	24	.mode = 0644,
6d9f239a	25	.proc_handler = proc_dointvec
1da177e4	26	},
f8572d8f	27	{ }
34ac2573 PE	28	};
34ac2573 PE	29
81e43213	30	static ctl_table ipv6_rotable[] = {
1da177e4	31	{
1da177e4 LT	32	.procname = "mld_max_msf",
	33	.data = &sysctl_mld_max_msf,
	34	.maxlen = sizeof(int),
	35	.mode = 0644,
6d9f239a	36	.proc_handler = proc_dointvec
1da177e4	37	},
f8572d8f	38	{ }
1da177e4 LT	39	};
1da177e4 LT	40
2c8c1e72	41	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	42	{
760f2d01 DL	43	struct ctl_table *ipv6_table;
	44	struct ctl_table *ipv6_route_table;
	45	struct ctl_table *ipv6_icmp_table;
	46	int err;
	47
	48	err = -ENOMEM;
	49	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	50	GFP_KERNEL);
	51	if (!ipv6_table)
	52	goto out;
6dceb036	53	ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
760f2d01 DL	54
	55	ipv6_route_table = ipv6_route_sysctl_init(net);
	56	if (!ipv6_route_table)
	57	goto out_ipv6_table;
	58
	59	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	60	if (!ipv6_icmp_table)
	61	goto out_ipv6_route_table;
760f2d01	62
6dceb036 EB	63	net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
6dceb036 EB	64	if (!net->ipv6.sysctl.hdr)
760f2d01 DL	65	goto out_ipv6_icmp_table;
760f2d01 DL	66
6dceb036 EB	67	net->ipv6.sysctl.route_hdr =
	68	register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
	69	if (!net->ipv6.sysctl.route_hdr)
	70	goto out_unregister_ipv6_table;
	71
	72	net->ipv6.sysctl.icmp_hdr =
	73	register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
	74	if (!net->ipv6.sysctl.icmp_hdr)
	75	goto out_unregister_route_table;
	76
760f2d01 DL	77	err = 0;
	78	out:
	79	return err;
6dceb036 EB	80	out_unregister_route_table:
	81	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	82	out_unregister_ipv6_table:
	83	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	84	out_ipv6_icmp_table:
	85	kfree(ipv6_icmp_table);
	86	out_ipv6_route_table:
	87	kfree(ipv6_route_table);
	88	out_ipv6_table:
	89	kfree(ipv6_table);
	90	goto out;
1da177e4 LT	91	}
1da177e4 LT	92
2c8c1e72	93	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	94	{
760f2d01 DL	95	struct ctl_table *ipv6_table;
	96	struct ctl_table *ipv6_route_table;
	97	struct ctl_table *ipv6_icmp_table;
	98
6dceb036 EB	99	ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
	100	ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
	101	ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
760f2d01	102
6dceb036 EB	103	unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
	104	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	105	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	106
	107	kfree(ipv6_table);
	108	kfree(ipv6_route_table);
	109	kfree(ipv6_icmp_table);
89918fc2 DL	110	}
	111
	112	static struct pernet_operations ipv6_sysctl_net_ops = {
	113	.init = ipv6_sysctl_net_init,
	114	.exit = ipv6_sysctl_net_exit,
	115	};
	116
34ac2573 PE	117	static struct ctl_table_header *ip6_header;
34ac2573 PE	118
89918fc2 DL	119	int ipv6_sysctl_register(void)
89918fc2 DL	120	{
c19a28e1	121	int err = -ENOMEM;
34ac2573	122
43444757	123	ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
34ac2573 PE	124	if (ip6_header == NULL)
	125	goto out;
	126
	127	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	128	if (err)
	129	goto err_pernet;
	130	out:
	131	return err;
	132
	133	err_pernet:
	134	unregister_net_sysctl_table(ip6_header);
	135	goto out;
89918fc2 DL	136	}
89918fc2 DL	137
1da177e4 LT	138	void ipv6_sysctl_unregister(void)
1da177e4 LT	139	{
34ac2573	140	unregister_net_sysctl_table(ip6_header);
89918fc2	141	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	142	}