[linux-2.6-block.git] / net / ipv6 / sysctl_net_ipv6.c

// SPDX-License-Identifier: GPL-2.0
/*
 * 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>
#ifdef CONFIG_NETLABEL
#include <net/calipso.h>
#endif

static int one = 1;
static int auto_flowlabels_min;
static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;


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_minmax,
		.extra1		= &auto_flowlabels_min,
		.extra2		= &auto_flowlabels_max
	},
	{
		.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
	},
	{
		.procname	= "ip_nonlocal_bind",
		.data		= &init_net.ipv6.sysctl.ip_nonlocal_bind,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "flowlabel_reflect",
		.data		= &init_net.ipv6.sysctl.flowlabel_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
	},
	{
		.procname	= "mld_qrv",
		.data		= &sysctl_mld_qrv,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= &one
	},
#ifdef CONFIG_NETLABEL
	{
		.procname	= "calipso_cache_enable",
		.data		= &calipso_cache_enabled,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
	{
		.procname	= "calipso_cache_bucket_size",
		.data		= &calipso_cache_bucketsize,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec,
	},
#endif /* CONFIG_NETLABEL */
	{ }
};

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_table[8].data = &net->ipv6.sysctl.ip_nonlocal_bind;
	ipv6_table[9].data = &net->ipv6.sysctl.flowlabel_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)
		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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
	4	*
	5	* Changes:
	6	* YOSHIFUJI Hideaki @USAGI: added icmp sysctl table.
	7	*/
	8
	9	#include <linux/mm.h>
	10	#include <linux/sysctl.h>
1da177e4 LT	11	#include <linux/in6.h>
1da177e4 LT	12	#include <linux/ipv6.h>
5a0e3ad6	13	#include <linux/slab.h>
bc3b2d7f	14	#include <linux/export.h>
1da177e4 LT	15	#include <net/ndisc.h>
	16	#include <net/ipv6.h>
	17	#include <net/addrconf.h>
04128f23	18	#include <net/inet_frag.h>
4fee5242 HD	19	#ifdef CONFIG_NETLABEL
	20	#include <net/calipso.h>
	21	#endif
1da177e4	22
2f711939	23	static int one = 1;
42240901 TH	24	static int auto_flowlabels_min;
	25	static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
	26
2f711939	27
fe2c6338	28	static struct ctl_table ipv6_table_template[] = {
1da177e4	29	{
1da177e4	30	.procname = "bindv6only",
99bc9c4e	31	.data = &init_net.ipv6.sysctl.bindv6only,
1da177e4 LT	32	.maxlen = sizeof(int),
1da177e4 LT	33	.mode = 0644,
6d9f239a	34	.proc_handler = proc_dointvec
1da177e4	35	},
509aba3b FLB	36	{
509aba3b FLB	37	.procname = "anycast_src_echo_reply",
ec35b61e	38	.data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
509aba3b FLB	39	.maxlen = sizeof(int),
	40	.mode = 0644,
	41	.proc_handler = proc_dointvec
	42	},
6444f72b FF	43	{
	44	.procname = "flowlabel_consistency",
	45	.data = &init_net.ipv6.sysctl.flowlabel_consistency,
	46	.maxlen = sizeof(int),
	47	.mode = 0644,
	48	.proc_handler = proc_dointvec
	49	},
cb1ce2ef TH	50	{
	51	.procname = "auto_flowlabels",
	52	.data = &init_net.ipv6.sysctl.auto_flowlabels,
	53	.maxlen = sizeof(int),
	54	.mode = 0644,
42240901 TH	55	.proc_handler = proc_dointvec_minmax,
	56	.extra1 = &auto_flowlabels_min,
	57	.extra2 = &auto_flowlabels_max
cb1ce2ef	58	},
e110861f LC	59	{
	60	.procname = "fwmark_reflect",
	61	.data = &init_net.ipv6.sysctl.fwmark_reflect,
	62	.maxlen = sizeof(int),
	63	.mode = 0644,
	64	.proc_handler = proc_dointvec
	65	},
1855b7c3 HFS	66	{
	67	.procname = "idgen_retries",
	68	.data = &init_net.ipv6.sysctl.idgen_retries,
	69	.maxlen = sizeof(int),
	70	.mode = 0644,
	71	.proc_handler = proc_dointvec,
	72	},
	73	{
	74	.procname = "idgen_delay",
	75	.data = &init_net.ipv6.sysctl.idgen_delay,
	76	.maxlen = sizeof(int),
	77	.mode = 0644,
	78	.proc_handler = proc_dointvec_jiffies,
	79	},
82a584b7 TH	80	{
	81	.procname = "flowlabel_state_ranges",
	82	.data = &init_net.ipv6.sysctl.flowlabel_state_ranges,
	83	.maxlen = sizeof(int),
	84	.mode = 0644,
	85	.proc_handler = proc_dointvec
	86	},
35a256fe TH	87	{
	88	.procname = "ip_nonlocal_bind",
	89	.data = &init_net.ipv6.sysctl.ip_nonlocal_bind,
	90	.maxlen = sizeof(int),
	91	.mode = 0644,
	92	.proc_handler = proc_dointvec
	93	},
22b6722b JS	94	{
	95	.procname = "flowlabel_reflect",
	96	.data = &init_net.ipv6.sysctl.flowlabel_reflect,
	97	.maxlen = sizeof(int),
	98	.mode = 0644,
	99	.proc_handler = proc_dointvec,
	100	},
f8572d8f	101	{ }
34ac2573 PE	102	};
34ac2573 PE	103
fe2c6338	104	static struct ctl_table ipv6_rotable[] = {
1da177e4	105	{
1da177e4 LT	106	.procname = "mld_max_msf",
	107	.data = &sysctl_mld_max_msf,
	108	.maxlen = sizeof(int),
	109	.mode = 0644,
6d9f239a	110	.proc_handler = proc_dointvec
1da177e4	111	},
2f711939 HFS	112	{
	113	.procname = "mld_qrv",
	114	.data = &sysctl_mld_qrv,
	115	.maxlen = sizeof(int),
	116	.mode = 0644,
	117	.proc_handler = proc_dointvec_minmax,
	118	.extra1 = &one
	119	},
4fee5242 HD	120	#ifdef CONFIG_NETLABEL
	121	{
	122	.procname = "calipso_cache_enable",
	123	.data = &calipso_cache_enabled,
	124	.maxlen = sizeof(int),
	125	.mode = 0644,
	126	.proc_handler = proc_dointvec,
	127	},
	128	{
	129	.procname = "calipso_cache_bucket_size",
	130	.data = &calipso_cache_bucketsize,
	131	.maxlen = sizeof(int),
	132	.mode = 0644,
	133	.proc_handler = proc_dointvec,
	134	},
	135	#endif /* CONFIG_NETLABEL */
f8572d8f	136	{ }
1da177e4 LT	137	};
1da177e4 LT	138
2c8c1e72	139	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	140	{
760f2d01 DL	141	struct ctl_table *ipv6_table;
	142	struct ctl_table *ipv6_route_table;
	143	struct ctl_table *ipv6_icmp_table;
	144	int err;
	145
	146	err = -ENOMEM;
	147	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	148	GFP_KERNEL);
	149	if (!ipv6_table)
	150	goto out;
6dceb036	151	ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
ec35b61e	152	ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply;
6444f72b	153	ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency;
cb1ce2ef	154	ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels;
d247b6ab	155	ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect;
1855b7c3 HFS	156	ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries;
1855b7c3 HFS	157	ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay;
82a584b7	158	ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges;
35a256fe	159	ipv6_table[8].data = &net->ipv6.sysctl.ip_nonlocal_bind;
22b6722b	160	ipv6_table[9].data = &net->ipv6.sysctl.flowlabel_reflect;
760f2d01 DL	161
	162	ipv6_route_table = ipv6_route_sysctl_init(net);
	163	if (!ipv6_route_table)
	164	goto out_ipv6_table;
	165
	166	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	167	if (!ipv6_icmp_table)
	168	goto out_ipv6_route_table;
760f2d01	169
6dceb036 EB	170	net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
6dceb036 EB	171	if (!net->ipv6.sysctl.hdr)
760f2d01 DL	172	goto out_ipv6_icmp_table;
760f2d01 DL	173
6dceb036 EB	174	net->ipv6.sysctl.route_hdr =
	175	register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
	176	if (!net->ipv6.sysctl.route_hdr)
	177	goto out_unregister_ipv6_table;
	178
	179	net->ipv6.sysctl.icmp_hdr =
	180	register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
	181	if (!net->ipv6.sysctl.icmp_hdr)
	182	goto out_unregister_route_table;
	183
760f2d01 DL	184	err = 0;
	185	out:
	186	return err;
6dceb036 EB	187	out_unregister_route_table:
	188	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	189	out_unregister_ipv6_table:
	190	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	191	out_ipv6_icmp_table:
	192	kfree(ipv6_icmp_table);
	193	out_ipv6_route_table:
	194	kfree(ipv6_route_table);
	195	out_ipv6_table:
	196	kfree(ipv6_table);
	197	goto out;
1da177e4 LT	198	}
1da177e4 LT	199
2c8c1e72	200	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	201	{
760f2d01 DL	202	struct ctl_table *ipv6_table;
	203	struct ctl_table *ipv6_route_table;
	204	struct ctl_table *ipv6_icmp_table;
	205
6dceb036 EB	206	ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
	207	ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
	208	ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
760f2d01	209
6dceb036 EB	210	unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
	211	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	212	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	213
	214	kfree(ipv6_table);
	215	kfree(ipv6_route_table);
	216	kfree(ipv6_icmp_table);
89918fc2 DL	217	}
	218
	219	static struct pernet_operations ipv6_sysctl_net_ops = {
	220	.init = ipv6_sysctl_net_init,
	221	.exit = ipv6_sysctl_net_exit,
	222	};
	223
34ac2573 PE	224	static struct ctl_table_header *ip6_header;
34ac2573 PE	225
89918fc2 DL	226	int ipv6_sysctl_register(void)
89918fc2 DL	227	{
c19a28e1	228	int err = -ENOMEM;
34ac2573	229
43444757	230	ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
63159f29	231	if (!ip6_header)
34ac2573 PE	232	goto out;
	233
	234	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	235	if (err)
	236	goto err_pernet;
	237	out:
	238	return err;
	239
	240	err_pernet:
	241	unregister_net_sysctl_table(ip6_header);
	242	goto out;
89918fc2 DL	243	}
89918fc2 DL	244
1da177e4 LT	245	void ipv6_sysctl_unregister(void)
1da177e4 LT	246	{
34ac2573	247	unregister_net_sysctl_table(ip6_header);
89918fc2	248	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	249	}