Loading...
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>
10#include <linux/in6.h>
11#include <linux/ipv6.h>
12#include <linux/slab.h>
13#include <net/ndisc.h>
14#include <net/ipv6.h>
15#include <net/addrconf.h>
16#include <net/inet_frag.h>
17
18static struct ctl_table empty[1];
19
20static ctl_table ipv6_static_skeleton[] = {
21 {
22 .procname = "neigh",
23 .maxlen = 0,
24 .mode = 0555,
25 .child = empty,
26 },
27 { }
28};
29
30static ctl_table ipv6_table_template[] = {
31 {
32 .procname = "route",
33 .maxlen = 0,
34 .mode = 0555,
35 .child = ipv6_route_table_template
36 },
37 {
38 .procname = "icmp",
39 .maxlen = 0,
40 .mode = 0555,
41 .child = ipv6_icmp_table_template
42 },
43 {
44 .procname = "bindv6only",
45 .data = &init_net.ipv6.sysctl.bindv6only,
46 .maxlen = sizeof(int),
47 .mode = 0644,
48 .proc_handler = proc_dointvec
49 },
50 { }
51};
52
53static ctl_table ipv6_rotable[] = {
54 {
55 .procname = "mld_max_msf",
56 .data = &sysctl_mld_max_msf,
57 .maxlen = sizeof(int),
58 .mode = 0644,
59 .proc_handler = proc_dointvec
60 },
61 { }
62};
63
64struct ctl_path net_ipv6_ctl_path[] = {
65 { .procname = "net", },
66 { .procname = "ipv6", },
67 { },
68};
69EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
70
71static int __net_init ipv6_sysctl_net_init(struct net *net)
72{
73 struct ctl_table *ipv6_table;
74 struct ctl_table *ipv6_route_table;
75 struct ctl_table *ipv6_icmp_table;
76 int err;
77
78 err = -ENOMEM;
79 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
80 GFP_KERNEL);
81 if (!ipv6_table)
82 goto out;
83
84 ipv6_route_table = ipv6_route_sysctl_init(net);
85 if (!ipv6_route_table)
86 goto out_ipv6_table;
87 ipv6_table[0].child = ipv6_route_table;
88
89 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
90 if (!ipv6_icmp_table)
91 goto out_ipv6_route_table;
92 ipv6_table[1].child = ipv6_icmp_table;
93
94 ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
95
96 net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
97 ipv6_table);
98 if (!net->ipv6.sysctl.table)
99 goto out_ipv6_icmp_table;
100
101 err = 0;
102out:
103 return err;
104
105out_ipv6_icmp_table:
106 kfree(ipv6_icmp_table);
107out_ipv6_route_table:
108 kfree(ipv6_route_table);
109out_ipv6_table:
110 kfree(ipv6_table);
111 goto out;
112}
113
114static void __net_exit ipv6_sysctl_net_exit(struct net *net)
115{
116 struct ctl_table *ipv6_table;
117 struct ctl_table *ipv6_route_table;
118 struct ctl_table *ipv6_icmp_table;
119
120 ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
121 ipv6_route_table = ipv6_table[0].child;
122 ipv6_icmp_table = ipv6_table[1].child;
123
124 unregister_net_sysctl_table(net->ipv6.sysctl.table);
125
126 kfree(ipv6_table);
127 kfree(ipv6_route_table);
128 kfree(ipv6_icmp_table);
129}
130
131static struct pernet_operations ipv6_sysctl_net_ops = {
132 .init = ipv6_sysctl_net_init,
133 .exit = ipv6_sysctl_net_exit,
134};
135
136static struct ctl_table_header *ip6_header;
137
138int ipv6_sysctl_register(void)
139{
140 int err = -ENOMEM;
141
142 ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
143 if (ip6_header == NULL)
144 goto out;
145
146 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
147 if (err)
148 goto err_pernet;
149out:
150 return err;
151
152err_pernet:
153 unregister_net_sysctl_table(ip6_header);
154 goto out;
155}
156
157void ipv6_sysctl_unregister(void)
158{
159 unregister_net_sysctl_table(ip6_header);
160 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
161}
162
163static struct ctl_table_header *ip6_base;
164
165int ipv6_static_sysctl_register(void)
166{
167 ip6_base = register_sysctl_paths(net_ipv6_ctl_path, ipv6_static_skeleton);
168 if (ip6_base == NULL)
169 return -ENOMEM;
170 return 0;
171}
172
173void ipv6_static_sysctl_unregister(void)
174{
175 unregister_net_sysctl_table(ip6_base);
176}
1// SPDX-License-Identifier: GPL-2.0
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>
11#include <linux/in6.h>
12#include <linux/ipv6.h>
13#include <linux/slab.h>
14#include <linux/export.h>
15#include <net/ndisc.h>
16#include <net/ipv6.h>
17#include <net/addrconf.h>
18#include <net/inet_frag.h>
19#include <net/netevent.h>
20#ifdef CONFIG_NETLABEL
21#include <net/calipso.h>
22#endif
23
24static int two = 2;
25static int flowlabel_reflect_max = 0x7;
26static int auto_flowlabels_min;
27static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
28
29static int proc_rt6_multipath_hash_policy(struct ctl_table *table, int write,
30 void *buffer, size_t *lenp, loff_t *ppos)
31{
32 struct net *net;
33 int ret;
34
35 net = container_of(table->data, struct net,
36 ipv6.sysctl.multipath_hash_policy);
37 ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
38 if (write && ret == 0)
39 call_netevent_notifiers(NETEVENT_IPV6_MPATH_HASH_UPDATE, net);
40
41 return ret;
42}
43
44static struct ctl_table ipv6_table_template[] = {
45 {
46 .procname = "bindv6only",
47 .data = &init_net.ipv6.sysctl.bindv6only,
48 .maxlen = sizeof(int),
49 .mode = 0644,
50 .proc_handler = proc_dointvec
51 },
52 {
53 .procname = "anycast_src_echo_reply",
54 .data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
55 .maxlen = sizeof(int),
56 .mode = 0644,
57 .proc_handler = proc_dointvec
58 },
59 {
60 .procname = "flowlabel_consistency",
61 .data = &init_net.ipv6.sysctl.flowlabel_consistency,
62 .maxlen = sizeof(int),
63 .mode = 0644,
64 .proc_handler = proc_dointvec
65 },
66 {
67 .procname = "auto_flowlabels",
68 .data = &init_net.ipv6.sysctl.auto_flowlabels,
69 .maxlen = sizeof(int),
70 .mode = 0644,
71 .proc_handler = proc_dointvec_minmax,
72 .extra1 = &auto_flowlabels_min,
73 .extra2 = &auto_flowlabels_max
74 },
75 {
76 .procname = "fwmark_reflect",
77 .data = &init_net.ipv6.sysctl.fwmark_reflect,
78 .maxlen = sizeof(int),
79 .mode = 0644,
80 .proc_handler = proc_dointvec
81 },
82 {
83 .procname = "idgen_retries",
84 .data = &init_net.ipv6.sysctl.idgen_retries,
85 .maxlen = sizeof(int),
86 .mode = 0644,
87 .proc_handler = proc_dointvec,
88 },
89 {
90 .procname = "idgen_delay",
91 .data = &init_net.ipv6.sysctl.idgen_delay,
92 .maxlen = sizeof(int),
93 .mode = 0644,
94 .proc_handler = proc_dointvec_jiffies,
95 },
96 {
97 .procname = "flowlabel_state_ranges",
98 .data = &init_net.ipv6.sysctl.flowlabel_state_ranges,
99 .maxlen = sizeof(int),
100 .mode = 0644,
101 .proc_handler = proc_dointvec
102 },
103 {
104 .procname = "ip_nonlocal_bind",
105 .data = &init_net.ipv6.sysctl.ip_nonlocal_bind,
106 .maxlen = sizeof(int),
107 .mode = 0644,
108 .proc_handler = proc_dointvec
109 },
110 {
111 .procname = "flowlabel_reflect",
112 .data = &init_net.ipv6.sysctl.flowlabel_reflect,
113 .maxlen = sizeof(int),
114 .mode = 0644,
115 .proc_handler = proc_dointvec_minmax,
116 .extra1 = SYSCTL_ZERO,
117 .extra2 = &flowlabel_reflect_max,
118 },
119 {
120 .procname = "max_dst_opts_number",
121 .data = &init_net.ipv6.sysctl.max_dst_opts_cnt,
122 .maxlen = sizeof(int),
123 .mode = 0644,
124 .proc_handler = proc_dointvec
125 },
126 {
127 .procname = "max_hbh_opts_number",
128 .data = &init_net.ipv6.sysctl.max_hbh_opts_cnt,
129 .maxlen = sizeof(int),
130 .mode = 0644,
131 .proc_handler = proc_dointvec
132 },
133 {
134 .procname = "max_dst_opts_length",
135 .data = &init_net.ipv6.sysctl.max_dst_opts_len,
136 .maxlen = sizeof(int),
137 .mode = 0644,
138 .proc_handler = proc_dointvec
139 },
140 {
141 .procname = "max_hbh_length",
142 .data = &init_net.ipv6.sysctl.max_hbh_opts_len,
143 .maxlen = sizeof(int),
144 .mode = 0644,
145 .proc_handler = proc_dointvec
146 },
147 {
148 .procname = "fib_multipath_hash_policy",
149 .data = &init_net.ipv6.sysctl.multipath_hash_policy,
150 .maxlen = sizeof(int),
151 .mode = 0644,
152 .proc_handler = proc_rt6_multipath_hash_policy,
153 .extra1 = SYSCTL_ZERO,
154 .extra2 = &two,
155 },
156 {
157 .procname = "seg6_flowlabel",
158 .data = &init_net.ipv6.sysctl.seg6_flowlabel,
159 .maxlen = sizeof(int),
160 .mode = 0644,
161 .proc_handler = proc_dointvec
162 },
163 { }
164};
165
166static struct ctl_table ipv6_rotable[] = {
167 {
168 .procname = "mld_max_msf",
169 .data = &sysctl_mld_max_msf,
170 .maxlen = sizeof(int),
171 .mode = 0644,
172 .proc_handler = proc_dointvec
173 },
174 {
175 .procname = "mld_qrv",
176 .data = &sysctl_mld_qrv,
177 .maxlen = sizeof(int),
178 .mode = 0644,
179 .proc_handler = proc_dointvec_minmax,
180 .extra1 = SYSCTL_ONE
181 },
182#ifdef CONFIG_NETLABEL
183 {
184 .procname = "calipso_cache_enable",
185 .data = &calipso_cache_enabled,
186 .maxlen = sizeof(int),
187 .mode = 0644,
188 .proc_handler = proc_dointvec,
189 },
190 {
191 .procname = "calipso_cache_bucket_size",
192 .data = &calipso_cache_bucketsize,
193 .maxlen = sizeof(int),
194 .mode = 0644,
195 .proc_handler = proc_dointvec,
196 },
197#endif /* CONFIG_NETLABEL */
198 { }
199};
200
201static int __net_init ipv6_sysctl_net_init(struct net *net)
202{
203 struct ctl_table *ipv6_table;
204 struct ctl_table *ipv6_route_table;
205 struct ctl_table *ipv6_icmp_table;
206 int err, i;
207
208 err = -ENOMEM;
209 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
210 GFP_KERNEL);
211 if (!ipv6_table)
212 goto out;
213 /* Update the variables to point into the current struct net */
214 for (i = 0; i < ARRAY_SIZE(ipv6_table_template) - 1; i++)
215 ipv6_table[i].data += (void *)net - (void *)&init_net;
216
217 ipv6_route_table = ipv6_route_sysctl_init(net);
218 if (!ipv6_route_table)
219 goto out_ipv6_table;
220
221 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
222 if (!ipv6_icmp_table)
223 goto out_ipv6_route_table;
224
225 net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
226 if (!net->ipv6.sysctl.hdr)
227 goto out_ipv6_icmp_table;
228
229 net->ipv6.sysctl.route_hdr =
230 register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
231 if (!net->ipv6.sysctl.route_hdr)
232 goto out_unregister_ipv6_table;
233
234 net->ipv6.sysctl.icmp_hdr =
235 register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
236 if (!net->ipv6.sysctl.icmp_hdr)
237 goto out_unregister_route_table;
238
239 err = 0;
240out:
241 return err;
242out_unregister_route_table:
243 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
244out_unregister_ipv6_table:
245 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
246out_ipv6_icmp_table:
247 kfree(ipv6_icmp_table);
248out_ipv6_route_table:
249 kfree(ipv6_route_table);
250out_ipv6_table:
251 kfree(ipv6_table);
252 goto out;
253}
254
255static void __net_exit ipv6_sysctl_net_exit(struct net *net)
256{
257 struct ctl_table *ipv6_table;
258 struct ctl_table *ipv6_route_table;
259 struct ctl_table *ipv6_icmp_table;
260
261 ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
262 ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
263 ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
264
265 unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
266 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
267 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
268
269 kfree(ipv6_table);
270 kfree(ipv6_route_table);
271 kfree(ipv6_icmp_table);
272}
273
274static struct pernet_operations ipv6_sysctl_net_ops = {
275 .init = ipv6_sysctl_net_init,
276 .exit = ipv6_sysctl_net_exit,
277};
278
279static struct ctl_table_header *ip6_header;
280
281int ipv6_sysctl_register(void)
282{
283 int err = -ENOMEM;
284
285 ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
286 if (!ip6_header)
287 goto out;
288
289 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
290 if (err)
291 goto err_pernet;
292out:
293 return err;
294
295err_pernet:
296 unregister_net_sysctl_table(ip6_header);
297 goto out;
298}
299
300void ipv6_sysctl_unregister(void)
301{
302 unregister_net_sysctl_table(ip6_header);
303 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
304}