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