[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 <linux/export.h>
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
#include <net/inet_frag.h>

static struct ctl_table ipv6_table_template[] = {
	{
		.procname	= "bindv6only",
		.data		= &init_net.ipv6.sysctl.bindv6only,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "anycast_src_echo_reply",
		.data		= &init_net.ipv6.sysctl.anycast_src_echo_reply,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "flowlabel_consistency",
		.data		= &init_net.ipv6.sysctl.flowlabel_consistency,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "auto_flowlabels",
		.data		= &init_net.ipv6.sysctl.auto_flowlabels,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "fwmark_reflect",
		.data		= &init_net.ipv6.sysctl.fwmark_reflect,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{ }
};

static struct 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_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply;
	ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency;
	ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels;
	ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect;

	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
fe2c6338	19	static struct 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	},
509aba3b FLB	27	{
509aba3b FLB	28	.procname = "anycast_src_echo_reply",
ec35b61e	29	.data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
509aba3b FLB	30	.maxlen = sizeof(int),
	31	.mode = 0644,
	32	.proc_handler = proc_dointvec
	33	},
6444f72b FF	34	{
	35	.procname = "flowlabel_consistency",
	36	.data = &init_net.ipv6.sysctl.flowlabel_consistency,
	37	.maxlen = sizeof(int),
	38	.mode = 0644,
	39	.proc_handler = proc_dointvec
	40	},
cb1ce2ef TH	41	{
	42	.procname = "auto_flowlabels",
	43	.data = &init_net.ipv6.sysctl.auto_flowlabels,
	44	.maxlen = sizeof(int),
	45	.mode = 0644,
	46	.proc_handler = proc_dointvec
	47	},
e110861f LC	48	{
	49	.procname = "fwmark_reflect",
	50	.data = &init_net.ipv6.sysctl.fwmark_reflect,
	51	.maxlen = sizeof(int),
	52	.mode = 0644,
	53	.proc_handler = proc_dointvec
	54	},
f8572d8f	55	{ }
34ac2573 PE	56	};
34ac2573 PE	57
fe2c6338	58	static struct ctl_table ipv6_rotable[] = {
1da177e4	59	{
1da177e4 LT	60	.procname = "mld_max_msf",
	61	.data = &sysctl_mld_max_msf,
	62	.maxlen = sizeof(int),
	63	.mode = 0644,
6d9f239a	64	.proc_handler = proc_dointvec
1da177e4	65	},
f8572d8f	66	{ }
1da177e4 LT	67	};
1da177e4 LT	68
2c8c1e72	69	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	70	{
760f2d01 DL	71	struct ctl_table *ipv6_table;
	72	struct ctl_table *ipv6_route_table;
	73	struct ctl_table *ipv6_icmp_table;
	74	int err;
	75
	76	err = -ENOMEM;
	77	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	78	GFP_KERNEL);
	79	if (!ipv6_table)
	80	goto out;
6dceb036	81	ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
ec35b61e	82	ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply;
6444f72b	83	ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency;
cb1ce2ef	84	ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels;
d247b6ab	85	ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect;
760f2d01 DL	86
	87	ipv6_route_table = ipv6_route_sysctl_init(net);
	88	if (!ipv6_route_table)
	89	goto out_ipv6_table;
	90
	91	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	92	if (!ipv6_icmp_table)
	93	goto out_ipv6_route_table;
760f2d01	94
6dceb036 EB	95	net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
6dceb036 EB	96	if (!net->ipv6.sysctl.hdr)
760f2d01 DL	97	goto out_ipv6_icmp_table;
760f2d01 DL	98
6dceb036 EB	99	net->ipv6.sysctl.route_hdr =
	100	register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
	101	if (!net->ipv6.sysctl.route_hdr)
	102	goto out_unregister_ipv6_table;
	103
	104	net->ipv6.sysctl.icmp_hdr =
	105	register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
	106	if (!net->ipv6.sysctl.icmp_hdr)
	107	goto out_unregister_route_table;
	108
760f2d01 DL	109	err = 0;
	110	out:
	111	return err;
6dceb036 EB	112	out_unregister_route_table:
	113	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	114	out_unregister_ipv6_table:
	115	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	116	out_ipv6_icmp_table:
	117	kfree(ipv6_icmp_table);
	118	out_ipv6_route_table:
	119	kfree(ipv6_route_table);
	120	out_ipv6_table:
	121	kfree(ipv6_table);
	122	goto out;
1da177e4 LT	123	}
1da177e4 LT	124
2c8c1e72	125	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	126	{
760f2d01 DL	127	struct ctl_table *ipv6_table;
	128	struct ctl_table *ipv6_route_table;
	129	struct ctl_table *ipv6_icmp_table;
	130
6dceb036 EB	131	ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
	132	ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
	133	ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
760f2d01	134
6dceb036 EB	135	unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
	136	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	137	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	138
	139	kfree(ipv6_table);
	140	kfree(ipv6_route_table);
	141	kfree(ipv6_icmp_table);
89918fc2 DL	142	}
	143
	144	static struct pernet_operations ipv6_sysctl_net_ops = {
	145	.init = ipv6_sysctl_net_init,
	146	.exit = ipv6_sysctl_net_exit,
	147	};
	148
34ac2573 PE	149	static struct ctl_table_header *ip6_header;
34ac2573 PE	150
89918fc2 DL	151	int ipv6_sysctl_register(void)
89918fc2 DL	152	{
c19a28e1	153	int err = -ENOMEM;
34ac2573	154
43444757	155	ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
34ac2573 PE	156	if (ip6_header == NULL)
	157	goto out;
	158
	159	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	160	if (err)
	161	goto err_pernet;
	162	out:
	163	return err;
	164
	165	err_pernet:
	166	unregister_net_sysctl_table(ip6_header);
	167	goto out;
89918fc2 DL	168	}
89918fc2 DL	169
1da177e4 LT	170	void ipv6_sysctl_unregister(void)
1da177e4 LT	171	{
34ac2573	172	unregister_net_sysctl_table(ip6_header);
89918fc2	173	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	174	}