[deliverable/linux.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 int one = 1;

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
	},
	{
		.procname	= "idgen_retries",
		.data		= &init_net.ipv6.sysctl.idgen_retries,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "idgen_delay",
		.data		= &init_net.ipv6.sysctl.idgen_delay,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_jiffies,
	},
	{
		.procname	= "flowlabel_state_ranges",
		.data		= &init_net.ipv6.sysctl.flowlabel_state_ranges,
		.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
	},
	{
		.procname	= "mld_qrv",
		.data		= &sysctl_mld_qrv,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &one
	},
	{ }
};

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_table[5].data = &net->ipv6.sysctl.idgen_retries;
	ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay;
	ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges;

	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)
		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
2f711939 HFS	19	static int one = 1;
2f711939 HFS	20
fe2c6338	21	static struct ctl_table ipv6_table_template[] = {
1da177e4	22	{
1da177e4	23	.procname = "bindv6only",
99bc9c4e	24	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	25	.maxlen = sizeof(int),
1da177e4 LT	26	.mode = 0644,
6d9f239a	27	.proc_handler = proc_dointvec
1da177e4	28	},
509aba3b FLB	29	{
509aba3b FLB	30	.procname = "anycast_src_echo_reply",
ec35b61e	31	.data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
509aba3b FLB	32	.maxlen = sizeof(int),
	33	.mode = 0644,
	34	.proc_handler = proc_dointvec
	35	},
6444f72b FF	36	{
	37	.procname = "flowlabel_consistency",
	38	.data = &init_net.ipv6.sysctl.flowlabel_consistency,
	39	.maxlen = sizeof(int),
	40	.mode = 0644,
	41	.proc_handler = proc_dointvec
	42	},
cb1ce2ef TH	43	{
	44	.procname = "auto_flowlabels",
	45	.data = &init_net.ipv6.sysctl.auto_flowlabels,
	46	.maxlen = sizeof(int),
	47	.mode = 0644,
	48	.proc_handler = proc_dointvec
	49	},
e110861f LC	50	{
	51	.procname = "fwmark_reflect",
	52	.data = &init_net.ipv6.sysctl.fwmark_reflect,
	53	.maxlen = sizeof(int),
	54	.mode = 0644,
	55	.proc_handler = proc_dointvec
	56	},
1855b7c3 HFS	57	{
	58	.procname = "idgen_retries",
	59	.data = &init_net.ipv6.sysctl.idgen_retries,
	60	.maxlen = sizeof(int),
	61	.mode = 0644,
	62	.proc_handler = proc_dointvec,
	63	},
	64	{
	65	.procname = "idgen_delay",
	66	.data = &init_net.ipv6.sysctl.idgen_delay,
	67	.maxlen = sizeof(int),
	68	.mode = 0644,
	69	.proc_handler = proc_dointvec_jiffies,
	70	},
82a584b7 TH	71	{
	72	.procname = "flowlabel_state_ranges",
	73	.data = &init_net.ipv6.sysctl.flowlabel_state_ranges,
	74	.maxlen = sizeof(int),
	75	.mode = 0644,
	76	.proc_handler = proc_dointvec
	77	},
f8572d8f	78	{ }
34ac2573 PE	79	};
34ac2573 PE	80
fe2c6338	81	static struct ctl_table ipv6_rotable[] = {
1da177e4	82	{
1da177e4 LT	83	.procname = "mld_max_msf",
	84	.data = &sysctl_mld_max_msf,
	85	.maxlen = sizeof(int),
	86	.mode = 0644,
6d9f239a	87	.proc_handler = proc_dointvec
1da177e4	88	},
2f711939 HFS	89	{
	90	.procname = "mld_qrv",
	91	.data = &sysctl_mld_qrv,
	92	.maxlen = sizeof(int),
	93	.mode = 0644,
	94	.proc_handler = proc_dointvec_minmax,
	95	.extra1 = &one
	96	},
f8572d8f	97	{ }
1da177e4 LT	98	};
1da177e4 LT	99
2c8c1e72	100	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	101	{
760f2d01 DL	102	struct ctl_table *ipv6_table;
	103	struct ctl_table *ipv6_route_table;
	104	struct ctl_table *ipv6_icmp_table;
	105	int err;
	106
	107	err = -ENOMEM;
	108	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	109	GFP_KERNEL);
	110	if (!ipv6_table)
	111	goto out;
6dceb036	112	ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
ec35b61e	113	ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply;
6444f72b	114	ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency;
cb1ce2ef	115	ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels;
d247b6ab	116	ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect;
1855b7c3 HFS	117	ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries;
1855b7c3 HFS	118	ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay;
82a584b7	119	ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges;
760f2d01 DL	120
	121	ipv6_route_table = ipv6_route_sysctl_init(net);
	122	if (!ipv6_route_table)
	123	goto out_ipv6_table;
	124
	125	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	126	if (!ipv6_icmp_table)
	127	goto out_ipv6_route_table;
760f2d01	128
6dceb036 EB	129	net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
6dceb036 EB	130	if (!net->ipv6.sysctl.hdr)
760f2d01 DL	131	goto out_ipv6_icmp_table;
760f2d01 DL	132
6dceb036 EB	133	net->ipv6.sysctl.route_hdr =
	134	register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
	135	if (!net->ipv6.sysctl.route_hdr)
	136	goto out_unregister_ipv6_table;
	137
	138	net->ipv6.sysctl.icmp_hdr =
	139	register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
	140	if (!net->ipv6.sysctl.icmp_hdr)
	141	goto out_unregister_route_table;
	142
760f2d01 DL	143	err = 0;
	144	out:
	145	return err;
6dceb036 EB	146	out_unregister_route_table:
	147	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	148	out_unregister_ipv6_table:
	149	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	150	out_ipv6_icmp_table:
	151	kfree(ipv6_icmp_table);
	152	out_ipv6_route_table:
	153	kfree(ipv6_route_table);
	154	out_ipv6_table:
	155	kfree(ipv6_table);
	156	goto out;
1da177e4 LT	157	}
1da177e4 LT	158
2c8c1e72	159	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	160	{
760f2d01 DL	161	struct ctl_table *ipv6_table;
	162	struct ctl_table *ipv6_route_table;
	163	struct ctl_table *ipv6_icmp_table;
	164
6dceb036 EB	165	ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
	166	ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
	167	ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
760f2d01	168
6dceb036 EB	169	unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
	170	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	171	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	172
	173	kfree(ipv6_table);
	174	kfree(ipv6_route_table);
	175	kfree(ipv6_icmp_table);
89918fc2 DL	176	}
	177
	178	static struct pernet_operations ipv6_sysctl_net_ops = {
	179	.init = ipv6_sysctl_net_init,
	180	.exit = ipv6_sysctl_net_exit,
	181	};
	182
34ac2573 PE	183	static struct ctl_table_header *ip6_header;
34ac2573 PE	184
89918fc2 DL	185	int ipv6_sysctl_register(void)
89918fc2 DL	186	{
c19a28e1	187	int err = -ENOMEM;
34ac2573	188
43444757	189	ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
63159f29	190	if (!ip6_header)
34ac2573 PE	191	goto out;
	192
	193	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	194	if (err)
	195	goto err_pernet;
	196	out:
	197	return err;
	198
	199	err_pernet:
	200	unregister_net_sysctl_table(ip6_header);
	201	goto out;
89918fc2 DL	202	}
89918fc2 DL	203
1da177e4 LT	204	void ipv6_sysctl_unregister(void)
1da177e4 LT	205	{
34ac2573	206	unregister_net_sysctl_table(ip6_header);
89918fc2	207	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	208	}