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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 <linux/export.h>
14#include <net/ndisc.h>
15#include <net/ipv6.h>
16#include <net/addrconf.h>
17#include <net/inet_frag.h>
18
19static ctl_table ipv6_table_template[] = {
20 {
21 .procname = "bindv6only",
22 .data = &init_net.ipv6.sysctl.bindv6only,
23 .maxlen = sizeof(int),
24 .mode = 0644,
25 .proc_handler = proc_dointvec
26 },
27 { }
28};
29
30static ctl_table ipv6_rotable[] = {
31 {
32 .procname = "mld_max_msf",
33 .data = &sysctl_mld_max_msf,
34 .maxlen = sizeof(int),
35 .mode = 0644,
36 .proc_handler = proc_dointvec
37 },
38 { }
39};
40
41static int __net_init ipv6_sysctl_net_init(struct net *net)
42{
43 struct ctl_table *ipv6_table;
44 struct ctl_table *ipv6_route_table;
45 struct ctl_table *ipv6_icmp_table;
46 int err;
47
48 err = -ENOMEM;
49 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
50 GFP_KERNEL);
51 if (!ipv6_table)
52 goto out;
53 ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
54
55 ipv6_route_table = ipv6_route_sysctl_init(net);
56 if (!ipv6_route_table)
57 goto out_ipv6_table;
58
59 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
60 if (!ipv6_icmp_table)
61 goto out_ipv6_route_table;
62
63 net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
64 if (!net->ipv6.sysctl.hdr)
65 goto out_ipv6_icmp_table;
66
67 net->ipv6.sysctl.route_hdr =
68 register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
69 if (!net->ipv6.sysctl.route_hdr)
70 goto out_unregister_ipv6_table;
71
72 net->ipv6.sysctl.icmp_hdr =
73 register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
74 if (!net->ipv6.sysctl.icmp_hdr)
75 goto out_unregister_route_table;
76
77 err = 0;
78out:
79 return err;
80out_unregister_route_table:
81 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
82out_unregister_ipv6_table:
83 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
84out_ipv6_icmp_table:
85 kfree(ipv6_icmp_table);
86out_ipv6_route_table:
87 kfree(ipv6_route_table);
88out_ipv6_table:
89 kfree(ipv6_table);
90 goto out;
91}
92
93static void __net_exit ipv6_sysctl_net_exit(struct net *net)
94{
95 struct ctl_table *ipv6_table;
96 struct ctl_table *ipv6_route_table;
97 struct ctl_table *ipv6_icmp_table;
98
99 ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
100 ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
101 ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
102
103 unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
104 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
105 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
106
107 kfree(ipv6_table);
108 kfree(ipv6_route_table);
109 kfree(ipv6_icmp_table);
110}
111
112static struct pernet_operations ipv6_sysctl_net_ops = {
113 .init = ipv6_sysctl_net_init,
114 .exit = ipv6_sysctl_net_exit,
115};
116
117static struct ctl_table_header *ip6_header;
118
119int ipv6_sysctl_register(void)
120{
121 int err = -ENOMEM;
122
123 ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
124 if (ip6_header == NULL)
125 goto out;
126
127 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
128 if (err)
129 goto err_pernet;
130out:
131 return err;
132
133err_pernet:
134 unregister_net_sysctl_table(ip6_header);
135 goto out;
136}
137
138void ipv6_sysctl_unregister(void)
139{
140 unregister_net_sysctl_table(ip6_header);
141 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
142}
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 flowlabel_reflect_max = 0x7;
25static int auto_flowlabels_min;
26static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
27
28static int proc_rt6_multipath_hash_policy(struct ctl_table *table, int write,
29 void __user *buffer, size_t *lenp,
30 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 = SYSCTL_ONE,
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;
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 ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
214 ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply;
215 ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency;
216 ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels;
217 ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect;
218 ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries;
219 ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay;
220 ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges;
221 ipv6_table[8].data = &net->ipv6.sysctl.ip_nonlocal_bind;
222 ipv6_table[9].data = &net->ipv6.sysctl.flowlabel_reflect;
223 ipv6_table[10].data = &net->ipv6.sysctl.max_dst_opts_cnt;
224 ipv6_table[11].data = &net->ipv6.sysctl.max_hbh_opts_cnt;
225 ipv6_table[12].data = &net->ipv6.sysctl.max_dst_opts_len;
226 ipv6_table[13].data = &net->ipv6.sysctl.max_hbh_opts_len;
227 ipv6_table[14].data = &net->ipv6.sysctl.multipath_hash_policy,
228 ipv6_table[15].data = &net->ipv6.sysctl.seg6_flowlabel;
229
230 ipv6_route_table = ipv6_route_sysctl_init(net);
231 if (!ipv6_route_table)
232 goto out_ipv6_table;
233
234 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
235 if (!ipv6_icmp_table)
236 goto out_ipv6_route_table;
237
238 net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
239 if (!net->ipv6.sysctl.hdr)
240 goto out_ipv6_icmp_table;
241
242 net->ipv6.sysctl.route_hdr =
243 register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
244 if (!net->ipv6.sysctl.route_hdr)
245 goto out_unregister_ipv6_table;
246
247 net->ipv6.sysctl.icmp_hdr =
248 register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
249 if (!net->ipv6.sysctl.icmp_hdr)
250 goto out_unregister_route_table;
251
252 err = 0;
253out:
254 return err;
255out_unregister_route_table:
256 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
257out_unregister_ipv6_table:
258 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
259out_ipv6_icmp_table:
260 kfree(ipv6_icmp_table);
261out_ipv6_route_table:
262 kfree(ipv6_route_table);
263out_ipv6_table:
264 kfree(ipv6_table);
265 goto out;
266}
267
268static void __net_exit ipv6_sysctl_net_exit(struct net *net)
269{
270 struct ctl_table *ipv6_table;
271 struct ctl_table *ipv6_route_table;
272 struct ctl_table *ipv6_icmp_table;
273
274 ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
275 ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
276 ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
277
278 unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
279 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
280 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
281
282 kfree(ipv6_table);
283 kfree(ipv6_route_table);
284 kfree(ipv6_icmp_table);
285}
286
287static struct pernet_operations ipv6_sysctl_net_ops = {
288 .init = ipv6_sysctl_net_init,
289 .exit = ipv6_sysctl_net_exit,
290};
291
292static struct ctl_table_header *ip6_header;
293
294int ipv6_sysctl_register(void)
295{
296 int err = -ENOMEM;
297
298 ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
299 if (!ip6_header)
300 goto out;
301
302 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
303 if (err)
304 goto err_pernet;
305out:
306 return err;
307
308err_pernet:
309 unregister_net_sysctl_table(ip6_header);
310 goto out;
311}
312
313void ipv6_sysctl_unregister(void)
314{
315 unregister_net_sysctl_table(ip6_header);
316 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
317}