[linux-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>
#include <net/netevent.h>
#include <net/ip_fib.h>
#ifdef CONFIG_NETLABEL
#include <net/calipso.h>
#endif
#include <linux/ioam6.h>

static int flowlabel_reflect_max = 0x7;
static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
static u32 rt6_multipath_hash_fields_all_mask =
	FIB_MULTIPATH_HASH_FIELD_ALL_MASK;
static u32 ioam6_id_max = IOAM6_DEFAULT_ID;
static u64 ioam6_id_wide_max = IOAM6_DEFAULT_ID_WIDE;

static int proc_rt6_multipath_hash_policy(struct ctl_table *table, int write,
					  void *buffer, size_t *lenp, loff_t *ppos)
{
	struct net *net;
	int ret;

	net = container_of(table->data, struct net,
			   ipv6.sysctl.multipath_hash_policy);
	ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
	if (write && ret == 0)
		call_netevent_notifiers(NETEVENT_IPV6_MPATH_HASH_UPDATE, net);

	return ret;
}

static int
proc_rt6_multipath_hash_fields(struct ctl_table *table, int write, void *buffer,
			       size_t *lenp, loff_t *ppos)
{
	struct net *net;
	int ret;

	net = container_of(table->data, struct net,
			   ipv6.sysctl.multipath_hash_fields);
	ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos);
	if (write && ret == 0)
		call_netevent_notifiers(NETEVENT_IPV6_MPATH_HASH_UPDATE, net);

	return ret;
}

static struct ctl_table ipv6_table_template[] = {
	{
		.procname	= "bindv6only",
		.data		= &init_net.ipv6.sysctl.bindv6only,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
	},
	{
		.procname	= "anycast_src_echo_reply",
		.data		= &init_net.ipv6.sysctl.anycast_src_echo_reply,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
	},
	{
		.procname	= "flowlabel_consistency",
		.data		= &init_net.ipv6.sysctl.flowlabel_consistency,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
	},
	{
		.procname	= "auto_flowlabels",
		.data		= &init_net.ipv6.sysctl.auto_flowlabels,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
		.extra2		= &auto_flowlabels_max
	},
	{
		.procname	= "fwmark_reflect",
		.data		= &init_net.ipv6.sysctl.fwmark_reflect,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
	},
	{
		.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(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
	},
	{
		.procname	= "ip_nonlocal_bind",
		.data		= &init_net.ipv6.sysctl.ip_nonlocal_bind,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
	},
	{
		.procname	= "flowlabel_reflect",
		.data		= &init_net.ipv6.sysctl.flowlabel_reflect,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec_minmax,
		.extra1		= SYSCTL_ZERO,
		.extra2		= &flowlabel_reflect_max,
	},
	{
		.procname	= "max_dst_opts_number",
		.data		= &init_net.ipv6.sysctl.max_dst_opts_cnt,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "max_hbh_opts_number",
		.data		= &init_net.ipv6.sysctl.max_hbh_opts_cnt,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "max_dst_opts_length",
		.data		= &init_net.ipv6.sysctl.max_dst_opts_len,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "max_hbh_length",
		.data		= &init_net.ipv6.sysctl.max_hbh_opts_len,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "fib_multipath_hash_policy",
		.data		= &init_net.ipv6.sysctl.multipath_hash_policy,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler   = proc_rt6_multipath_hash_policy,
		.extra1		= SYSCTL_ZERO,
		.extra2		= SYSCTL_THREE,
	},
	{
		.procname	= "fib_multipath_hash_fields",
		.data		= &init_net.ipv6.sysctl.multipath_hash_fields,
		.maxlen		= sizeof(u32),
		.mode		= 0644,
		.proc_handler	= proc_rt6_multipath_hash_fields,
		.extra1		= SYSCTL_ONE,
		.extra2		= &rt6_multipath_hash_fields_all_mask,
	},
	{
		.procname	= "seg6_flowlabel",
		.data		= &init_net.ipv6.sysctl.seg6_flowlabel,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= proc_dointvec
	},
	{
		.procname	= "fib_notify_on_flag_change",
		.data		= &init_net.ipv6.sysctl.fib_notify_on_flag_change,
		.maxlen		= sizeof(u8),
		.mode		= 0644,
		.proc_handler	= proc_dou8vec_minmax,
		.extra1         = SYSCTL_ZERO,
		.extra2         = SYSCTL_TWO,
	},
	{
		.procname	= "ioam6_id",
		.data		= &init_net.ipv6.sysctl.ioam6_id,
		.maxlen		= sizeof(u32),
		.mode		= 0644,
		.proc_handler	= proc_douintvec_minmax,
		.extra2		= &ioam6_id_max,
	},
	{
		.procname	= "ioam6_id_wide",
		.data		= &init_net.ipv6.sysctl.ioam6_id_wide,
		.maxlen		= sizeof(u64),
		.mode		= 0644,
		.proc_handler	= proc_doulongvec_minmax,
		.extra2		= &ioam6_id_wide_max,
	},
	{ }
};

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		= SYSCTL_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, i;

	err = -ENOMEM;
	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
			     GFP_KERNEL);
	if (!ipv6_table)
		goto out;
	/* Update the variables to point into the current struct net */
	for (i = 0; i < ARRAY_SIZE(ipv6_table_template) - 1; i++)
		ipv6_table[i].data += (void *)net - (void *)&init_net;

	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>
b4bac172	19	#include <net/netevent.h>
ed13923f	20	#include <net/ip_fib.h>
4fee5242 HD	21	#ifdef CONFIG_NETLABEL
	22	#include <net/calipso.h>
	23	#endif
9ee11f0f	24	#include <linux/ioam6.h>
1da177e4	25
a346abe0	26	static int flowlabel_reflect_max = 0x7;
42240901	27	static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
ed13923f IS	28	static u32 rt6_multipath_hash_fields_all_mask =
ed13923f IS	29	FIB_MULTIPATH_HASH_FIELD_ALL_MASK;
9ee11f0f JI	30	static u32 ioam6_id_max = IOAM6_DEFAULT_ID;
9ee11f0f JI	31	static u64 ioam6_id_wide_max = IOAM6_DEFAULT_ID_WIDE;
42240901	32
b4bac172	33	static int proc_rt6_multipath_hash_policy(struct ctl_table *table, int write,
32927393	34	void buffer, size_t lenp, loff_t *ppos)
b4bac172 DA	35	{
	36	struct net *net;
	37	int ret;
	38
	39	net = container_of(table->data, struct net,
	40	ipv6.sysctl.multipath_hash_policy);
a6175633	41	ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
b4bac172 DA	42	if (write && ret == 0)
	43	call_netevent_notifiers(NETEVENT_IPV6_MPATH_HASH_UPDATE, net);
	44
	45	return ret;
	46	}
2f711939	47
eb0e4d59 IS	48	static int
	49	proc_rt6_multipath_hash_fields(struct ctl_table table, int write, void buffer,
	50	size_t lenp, loff_t ppos)
	51	{
	52	struct net *net;
	53	int ret;
	54
	55	net = container_of(table->data, struct net,
	56	ipv6.sysctl.multipath_hash_fields);
	57	ret = proc_douintvec_minmax(table, write, buffer, lenp, ppos);
	58	if (write && ret == 0)
	59	call_netevent_notifiers(NETEVENT_IPV6_MPATH_HASH_UPDATE, net);
	60
	61	return ret;
	62	}
	63
fe2c6338	64	static struct ctl_table ipv6_table_template[] = {
1da177e4	65	{
1da177e4	66	.procname = "bindv6only",
99bc9c4e	67	.data = &init_net.ipv6.sysctl.bindv6only,
a6175633	68	.maxlen = sizeof(u8),
1da177e4	69	.mode = 0644,
a6175633	70	.proc_handler = proc_dou8vec_minmax,
1da177e4	71	},
509aba3b FLB	72	{
509aba3b FLB	73	.procname = "anycast_src_echo_reply",
ec35b61e	74	.data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
a6175633	75	.maxlen = sizeof(u8),
509aba3b	76	.mode = 0644,
a6175633	77	.proc_handler = proc_dou8vec_minmax,
509aba3b	78	},
6444f72b FF	79	{
	80	.procname = "flowlabel_consistency",
	81	.data = &init_net.ipv6.sysctl.flowlabel_consistency,
a6175633	82	.maxlen = sizeof(u8),
6444f72b	83	.mode = 0644,
a6175633	84	.proc_handler = proc_dou8vec_minmax,
6444f72b	85	},
cb1ce2ef TH	86	{
	87	.procname = "auto_flowlabels",
	88	.data = &init_net.ipv6.sysctl.auto_flowlabels,
a6175633	89	.maxlen = sizeof(u8),
cb1ce2ef	90	.mode = 0644,
a6175633	91	.proc_handler = proc_dou8vec_minmax,
42240901	92	.extra2 = &auto_flowlabels_max
cb1ce2ef	93	},
e110861f LC	94	{
	95	.procname = "fwmark_reflect",
	96	.data = &init_net.ipv6.sysctl.fwmark_reflect,
a6175633	97	.maxlen = sizeof(u8),
e110861f	98	.mode = 0644,
a6175633	99	.proc_handler = proc_dou8vec_minmax,
e110861f	100	},
1855b7c3 HFS	101	{
	102	.procname = "idgen_retries",
	103	.data = &init_net.ipv6.sysctl.idgen_retries,
	104	.maxlen = sizeof(int),
	105	.mode = 0644,
	106	.proc_handler = proc_dointvec,
	107	},
	108	{
	109	.procname = "idgen_delay",
	110	.data = &init_net.ipv6.sysctl.idgen_delay,
	111	.maxlen = sizeof(int),
	112	.mode = 0644,
	113	.proc_handler = proc_dointvec_jiffies,
	114	},
82a584b7 TH	115	{
	116	.procname = "flowlabel_state_ranges",
	117	.data = &init_net.ipv6.sysctl.flowlabel_state_ranges,
a6175633	118	.maxlen = sizeof(u8),
82a584b7	119	.mode = 0644,
a6175633	120	.proc_handler = proc_dou8vec_minmax,
82a584b7	121	},
35a256fe TH	122	{
	123	.procname = "ip_nonlocal_bind",
	124	.data = &init_net.ipv6.sysctl.ip_nonlocal_bind,
a6175633	125	.maxlen = sizeof(u8),
35a256fe	126	.mode = 0644,
a6175633	127	.proc_handler = proc_dou8vec_minmax,
35a256fe	128	},
22b6722b JS	129	{
	130	.procname = "flowlabel_reflect",
	131	.data = &init_net.ipv6.sysctl.flowlabel_reflect,
	132	.maxlen = sizeof(int),
	133	.mode = 0644,
00dc3307	134	.proc_handler = proc_dointvec_minmax,
eec4844f	135	.extra1 = SYSCTL_ZERO,
a346abe0	136	.extra2 = &flowlabel_reflect_max,
22b6722b	137	},
47d3d7ac TH	138	{
	139	.procname = "max_dst_opts_number",
	140	.data = &init_net.ipv6.sysctl.max_dst_opts_cnt,
	141	.maxlen = sizeof(int),
	142	.mode = 0644,
	143	.proc_handler = proc_dointvec
	144	},
	145	{
	146	.procname = "max_hbh_opts_number",
	147	.data = &init_net.ipv6.sysctl.max_hbh_opts_cnt,
	148	.maxlen = sizeof(int),
	149	.mode = 0644,
	150	.proc_handler = proc_dointvec
	151	},
	152	{
	153	.procname = "max_dst_opts_length",
	154	.data = &init_net.ipv6.sysctl.max_dst_opts_len,
	155	.maxlen = sizeof(int),
	156	.mode = 0644,
	157	.proc_handler = proc_dointvec
	158	},
	159	{
	160	.procname = "max_hbh_length",
	161	.data = &init_net.ipv6.sysctl.max_hbh_opts_len,
	162	.maxlen = sizeof(int),
	163	.mode = 0644,
	164	.proc_handler = proc_dointvec
	165	},
b4bac172 DA	166	{
	167	.procname = "fib_multipath_hash_policy",
	168	.data = &init_net.ipv6.sysctl.multipath_hash_policy,
a6175633	169	.maxlen = sizeof(u8),
b4bac172 DA	170	.mode = 0644,
b4bac172 DA	171	.proc_handler = proc_rt6_multipath_hash_policy,
eec4844f	172	.extra1 = SYSCTL_ZERO,
4c7f24f8	173	.extra2 = SYSCTL_THREE,
b4bac172	174	},
ed13923f IS	175	{
	176	.procname = "fib_multipath_hash_fields",
	177	.data = &init_net.ipv6.sysctl.multipath_hash_fields,
	178	.maxlen = sizeof(u32),
	179	.mode = 0644,
eb0e4d59	180	.proc_handler = proc_rt6_multipath_hash_fields,
ed13923f IS	181	.extra1 = SYSCTL_ONE,
	182	.extra2 = &rt6_multipath_hash_fields_all_mask,
	183	},
b5facfdb AA	184	{
	185	.procname = "seg6_flowlabel",
	186	.data = &init_net.ipv6.sysctl.seg6_flowlabel,
	187	.maxlen = sizeof(int),
	188	.mode = 0644,
	189	.proc_handler = proc_dointvec
	190	},
907eea48 AC	191	{
	192	.procname = "fib_notify_on_flag_change",
	193	.data = &init_net.ipv6.sysctl.fib_notify_on_flag_change,
a6175633	194	.maxlen = sizeof(u8),
907eea48	195	.mode = 0644,
a6175633	196	.proc_handler = proc_dou8vec_minmax,
907eea48	197	.extra1 = SYSCTL_ZERO,
bd8a5367	198	.extra2 = SYSCTL_TWO,
907eea48	199	},
9ee11f0f JI	200	{
	201	.procname = "ioam6_id",
	202	.data = &init_net.ipv6.sysctl.ioam6_id,
	203	.maxlen = sizeof(u32),
	204	.mode = 0644,
	205	.proc_handler = proc_douintvec_minmax,
	206	.extra2 = &ioam6_id_max,
	207	},
	208	{
	209	.procname = "ioam6_id_wide",
	210	.data = &init_net.ipv6.sysctl.ioam6_id_wide,
	211	.maxlen = sizeof(u64),
	212	.mode = 0644,
	213	.proc_handler = proc_doulongvec_minmax,
	214	.extra2 = &ioam6_id_wide_max,
	215	},
f8572d8f	216	{ }
34ac2573 PE	217	};
34ac2573 PE	218
fe2c6338	219	static struct ctl_table ipv6_rotable[] = {
1da177e4	220	{
1da177e4 LT	221	.procname = "mld_max_msf",
	222	.data = &sysctl_mld_max_msf,
	223	.maxlen = sizeof(int),
	224	.mode = 0644,
6d9f239a	225	.proc_handler = proc_dointvec
1da177e4	226	},
2f711939 HFS	227	{
	228	.procname = "mld_qrv",
	229	.data = &sysctl_mld_qrv,
	230	.maxlen = sizeof(int),
	231	.mode = 0644,
	232	.proc_handler = proc_dointvec_minmax,
eec4844f	233	.extra1 = SYSCTL_ONE
2f711939	234	},
4fee5242 HD	235	#ifdef CONFIG_NETLABEL
	236	{
	237	.procname = "calipso_cache_enable",
	238	.data = &calipso_cache_enabled,
	239	.maxlen = sizeof(int),
	240	.mode = 0644,
	241	.proc_handler = proc_dointvec,
	242	},
	243	{
	244	.procname = "calipso_cache_bucket_size",
	245	.data = &calipso_cache_bucketsize,
	246	.maxlen = sizeof(int),
	247	.mode = 0644,
	248	.proc_handler = proc_dointvec,
	249	},
	250	#endif /* CONFIG_NETLABEL */
f8572d8f	251	{ }
1da177e4 LT	252	};
1da177e4 LT	253
2c8c1e72	254	static int __net_init ipv6_sysctl_net_init(struct net *net)
1da177e4	255	{
760f2d01 DL	256	struct ctl_table *ipv6_table;
	257	struct ctl_table *ipv6_route_table;
	258	struct ctl_table *ipv6_icmp_table;
d2f7e56d	259	int err, i;
760f2d01 DL	260
	261	err = -ENOMEM;
	262	ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
	263	GFP_KERNEL);
	264	if (!ipv6_table)
	265	goto out;
d2f7e56d CZ	266	/* Update the variables to point into the current struct net */
	267	for (i = 0; i < ARRAY_SIZE(ipv6_table_template) - 1; i++)
	268	ipv6_table[i].data += (void )net - (void )&init_net;
760f2d01 DL	269
	270	ipv6_route_table = ipv6_route_sysctl_init(net);
	271	if (!ipv6_route_table)
	272	goto out_ipv6_table;
	273
	274	ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
	275	if (!ipv6_icmp_table)
	276	goto out_ipv6_route_table;
760f2d01	277
6dceb036 EB	278	net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
6dceb036 EB	279	if (!net->ipv6.sysctl.hdr)
760f2d01 DL	280	goto out_ipv6_icmp_table;
760f2d01 DL	281
6dceb036 EB	282	net->ipv6.sysctl.route_hdr =
	283	register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
	284	if (!net->ipv6.sysctl.route_hdr)
	285	goto out_unregister_ipv6_table;
	286
	287	net->ipv6.sysctl.icmp_hdr =
	288	register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
	289	if (!net->ipv6.sysctl.icmp_hdr)
	290	goto out_unregister_route_table;
	291
760f2d01 DL	292	err = 0;
	293	out:
	294	return err;
6dceb036 EB	295	out_unregister_route_table:
	296	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	297	out_unregister_ipv6_table:
	298	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	299	out_ipv6_icmp_table:
	300	kfree(ipv6_icmp_table);
	301	out_ipv6_route_table:
	302	kfree(ipv6_route_table);
	303	out_ipv6_table:
	304	kfree(ipv6_table);
	305	goto out;
1da177e4 LT	306	}
1da177e4 LT	307
2c8c1e72	308	static void __net_exit ipv6_sysctl_net_exit(struct net *net)
89918fc2	309	{
760f2d01 DL	310	struct ctl_table *ipv6_table;
	311	struct ctl_table *ipv6_route_table;
	312	struct ctl_table *ipv6_icmp_table;
	313
6dceb036 EB	314	ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
	315	ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
	316	ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
760f2d01	317
6dceb036 EB	318	unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
	319	unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
	320	unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
760f2d01 DL	321
	322	kfree(ipv6_table);
	323	kfree(ipv6_route_table);
	324	kfree(ipv6_icmp_table);
89918fc2 DL	325	}
	326
	327	static struct pernet_operations ipv6_sysctl_net_ops = {
	328	.init = ipv6_sysctl_net_init,
	329	.exit = ipv6_sysctl_net_exit,
	330	};
	331
34ac2573 PE	332	static struct ctl_table_header *ip6_header;
34ac2573 PE	333
89918fc2 DL	334	int ipv6_sysctl_register(void)
89918fc2 DL	335	{
c19a28e1	336	int err = -ENOMEM;
34ac2573	337
43444757	338	ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
63159f29	339	if (!ip6_header)
34ac2573 PE	340	goto out;
	341
	342	err = register_pernet_subsys(&ipv6_sysctl_net_ops);
	343	if (err)
	344	goto err_pernet;
	345	out:
	346	return err;
	347
	348	err_pernet:
	349	unregister_net_sysctl_table(ip6_header);
	350	goto out;
89918fc2 DL	351	}
89918fc2 DL	352
1da177e4 LT	353	void ipv6_sysctl_unregister(void)
1da177e4 LT	354	{
34ac2573	355	unregister_net_sysctl_table(ip6_header);
89918fc2	356	unregister_pernet_subsys(&ipv6_sysctl_net_ops);
1da177e4	357	}