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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 int one = 1;
20static int auto_flowlabels_min;
21static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
22
23
24static struct ctl_table ipv6_table_template[] = {
25 {
26 .procname = "bindv6only",
27 .data = &init_net.ipv6.sysctl.bindv6only,
28 .maxlen = sizeof(int),
29 .mode = 0644,
30 .proc_handler = proc_dointvec
31 },
32 {
33 .procname = "anycast_src_echo_reply",
34 .data = &init_net.ipv6.sysctl.anycast_src_echo_reply,
35 .maxlen = sizeof(int),
36 .mode = 0644,
37 .proc_handler = proc_dointvec
38 },
39 {
40 .procname = "flowlabel_consistency",
41 .data = &init_net.ipv6.sysctl.flowlabel_consistency,
42 .maxlen = sizeof(int),
43 .mode = 0644,
44 .proc_handler = proc_dointvec
45 },
46 {
47 .procname = "auto_flowlabels",
48 .data = &init_net.ipv6.sysctl.auto_flowlabels,
49 .maxlen = sizeof(int),
50 .mode = 0644,
51 .proc_handler = proc_dointvec_minmax,
52 .extra1 = &auto_flowlabels_min,
53 .extra2 = &auto_flowlabels_max
54 },
55 {
56 .procname = "fwmark_reflect",
57 .data = &init_net.ipv6.sysctl.fwmark_reflect,
58 .maxlen = sizeof(int),
59 .mode = 0644,
60 .proc_handler = proc_dointvec
61 },
62 {
63 .procname = "idgen_retries",
64 .data = &init_net.ipv6.sysctl.idgen_retries,
65 .maxlen = sizeof(int),
66 .mode = 0644,
67 .proc_handler = proc_dointvec,
68 },
69 {
70 .procname = "idgen_delay",
71 .data = &init_net.ipv6.sysctl.idgen_delay,
72 .maxlen = sizeof(int),
73 .mode = 0644,
74 .proc_handler = proc_dointvec_jiffies,
75 },
76 {
77 .procname = "flowlabel_state_ranges",
78 .data = &init_net.ipv6.sysctl.flowlabel_state_ranges,
79 .maxlen = sizeof(int),
80 .mode = 0644,
81 .proc_handler = proc_dointvec
82 },
83 {
84 .procname = "ip_nonlocal_bind",
85 .data = &init_net.ipv6.sysctl.ip_nonlocal_bind,
86 .maxlen = sizeof(int),
87 .mode = 0644,
88 .proc_handler = proc_dointvec
89 },
90 { }
91};
92
93static struct ctl_table ipv6_rotable[] = {
94 {
95 .procname = "mld_max_msf",
96 .data = &sysctl_mld_max_msf,
97 .maxlen = sizeof(int),
98 .mode = 0644,
99 .proc_handler = proc_dointvec
100 },
101 {
102 .procname = "mld_qrv",
103 .data = &sysctl_mld_qrv,
104 .maxlen = sizeof(int),
105 .mode = 0644,
106 .proc_handler = proc_dointvec_minmax,
107 .extra1 = &one
108 },
109 { }
110};
111
112static int __net_init ipv6_sysctl_net_init(struct net *net)
113{
114 struct ctl_table *ipv6_table;
115 struct ctl_table *ipv6_route_table;
116 struct ctl_table *ipv6_icmp_table;
117 int err;
118
119 err = -ENOMEM;
120 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
121 GFP_KERNEL);
122 if (!ipv6_table)
123 goto out;
124 ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
125 ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply;
126 ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency;
127 ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels;
128 ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect;
129 ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries;
130 ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay;
131 ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges;
132 ipv6_table[8].data = &net->ipv6.sysctl.ip_nonlocal_bind;
133
134 ipv6_route_table = ipv6_route_sysctl_init(net);
135 if (!ipv6_route_table)
136 goto out_ipv6_table;
137
138 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
139 if (!ipv6_icmp_table)
140 goto out_ipv6_route_table;
141
142 net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
143 if (!net->ipv6.sysctl.hdr)
144 goto out_ipv6_icmp_table;
145
146 net->ipv6.sysctl.route_hdr =
147 register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
148 if (!net->ipv6.sysctl.route_hdr)
149 goto out_unregister_ipv6_table;
150
151 net->ipv6.sysctl.icmp_hdr =
152 register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
153 if (!net->ipv6.sysctl.icmp_hdr)
154 goto out_unregister_route_table;
155
156 err = 0;
157out:
158 return err;
159out_unregister_route_table:
160 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
161out_unregister_ipv6_table:
162 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
163out_ipv6_icmp_table:
164 kfree(ipv6_icmp_table);
165out_ipv6_route_table:
166 kfree(ipv6_route_table);
167out_ipv6_table:
168 kfree(ipv6_table);
169 goto out;
170}
171
172static void __net_exit ipv6_sysctl_net_exit(struct net *net)
173{
174 struct ctl_table *ipv6_table;
175 struct ctl_table *ipv6_route_table;
176 struct ctl_table *ipv6_icmp_table;
177
178 ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
179 ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
180 ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
181
182 unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
183 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
184 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
185
186 kfree(ipv6_table);
187 kfree(ipv6_route_table);
188 kfree(ipv6_icmp_table);
189}
190
191static struct pernet_operations ipv6_sysctl_net_ops = {
192 .init = ipv6_sysctl_net_init,
193 .exit = ipv6_sysctl_net_exit,
194};
195
196static struct ctl_table_header *ip6_header;
197
198int ipv6_sysctl_register(void)
199{
200 int err = -ENOMEM;
201
202 ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
203 if (!ip6_header)
204 goto out;
205
206 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
207 if (err)
208 goto err_pernet;
209out:
210 return err;
211
212err_pernet:
213 unregister_net_sysctl_table(ip6_header);
214 goto out;
215}
216
217void ipv6_sysctl_unregister(void)
218{
219 unregister_net_sysctl_table(ip6_header);
220 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
221}
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}