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