Commit | Line | Data |
---|---|---|
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> |
1da177e4 | 18 | |
2f711939 | 19 | static int one = 1; |
42240901 TH |
20 | static int auto_flowlabels_min; |
21 | static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX; | |
22 | ||
2f711939 | 23 | |
fe2c6338 | 24 | static struct ctl_table ipv6_table_template[] = { |
1da177e4 | 25 | { |
1da177e4 | 26 | .procname = "bindv6only", |
99bc9c4e | 27 | .data = &init_net.ipv6.sysctl.bindv6only, |
1da177e4 LT |
28 | .maxlen = sizeof(int), |
29 | .mode = 0644, | |
6d9f239a | 30 | .proc_handler = proc_dointvec |
1da177e4 | 31 | }, |
509aba3b FLB |
32 | { |
33 | .procname = "anycast_src_echo_reply", | |
ec35b61e | 34 | .data = &init_net.ipv6.sysctl.anycast_src_echo_reply, |
509aba3b FLB |
35 | .maxlen = sizeof(int), |
36 | .mode = 0644, | |
37 | .proc_handler = proc_dointvec | |
38 | }, | |
6444f72b FF |
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 | }, | |
cb1ce2ef TH |
46 | { |
47 | .procname = "auto_flowlabels", | |
48 | .data = &init_net.ipv6.sysctl.auto_flowlabels, | |
49 | .maxlen = sizeof(int), | |
50 | .mode = 0644, | |
42240901 TH |
51 | .proc_handler = proc_dointvec_minmax, |
52 | .extra1 = &auto_flowlabels_min, | |
53 | .extra2 = &auto_flowlabels_max | |
cb1ce2ef | 54 | }, |
e110861f LC |
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 | }, | |
1855b7c3 HFS |
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 | }, | |
82a584b7 TH |
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 | }, | |
35a256fe TH |
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 | }, | |
f8572d8f | 90 | { } |
34ac2573 PE |
91 | }; |
92 | ||
fe2c6338 | 93 | static struct ctl_table ipv6_rotable[] = { |
1da177e4 | 94 | { |
1da177e4 LT |
95 | .procname = "mld_max_msf", |
96 | .data = &sysctl_mld_max_msf, | |
97 | .maxlen = sizeof(int), | |
98 | .mode = 0644, | |
6d9f239a | 99 | .proc_handler = proc_dointvec |
1da177e4 | 100 | }, |
2f711939 HFS |
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 | }, | |
f8572d8f | 109 | { } |
1da177e4 LT |
110 | }; |
111 | ||
2c8c1e72 | 112 | static int __net_init ipv6_sysctl_net_init(struct net *net) |
1da177e4 | 113 | { |
760f2d01 DL |
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; | |
6dceb036 | 124 | ipv6_table[0].data = &net->ipv6.sysctl.bindv6only; |
ec35b61e | 125 | ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply; |
6444f72b | 126 | ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency; |
cb1ce2ef | 127 | ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels; |
d247b6ab | 128 | ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect; |
1855b7c3 HFS |
129 | ipv6_table[5].data = &net->ipv6.sysctl.idgen_retries; |
130 | ipv6_table[6].data = &net->ipv6.sysctl.idgen_delay; | |
82a584b7 | 131 | ipv6_table[7].data = &net->ipv6.sysctl.flowlabel_state_ranges; |
35a256fe | 132 | ipv6_table[8].data = &net->ipv6.sysctl.ip_nonlocal_bind; |
760f2d01 DL |
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; | |
760f2d01 | 141 | |
6dceb036 EB |
142 | net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table); |
143 | if (!net->ipv6.sysctl.hdr) | |
760f2d01 DL |
144 | goto out_ipv6_icmp_table; |
145 | ||
6dceb036 EB |
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 | ||
760f2d01 DL |
156 | err = 0; |
157 | out: | |
158 | return err; | |
6dceb036 EB |
159 | out_unregister_route_table: |
160 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); | |
161 | out_unregister_ipv6_table: | |
162 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); | |
760f2d01 DL |
163 | out_ipv6_icmp_table: |
164 | kfree(ipv6_icmp_table); | |
165 | out_ipv6_route_table: | |
166 | kfree(ipv6_route_table); | |
167 | out_ipv6_table: | |
168 | kfree(ipv6_table); | |
169 | goto out; | |
1da177e4 LT |
170 | } |
171 | ||
2c8c1e72 | 172 | static void __net_exit ipv6_sysctl_net_exit(struct net *net) |
89918fc2 | 173 | { |
760f2d01 DL |
174 | struct ctl_table *ipv6_table; |
175 | struct ctl_table *ipv6_route_table; | |
176 | struct ctl_table *ipv6_icmp_table; | |
177 | ||
6dceb036 EB |
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; | |
760f2d01 | 181 | |
6dceb036 EB |
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); | |
760f2d01 DL |
185 | |
186 | kfree(ipv6_table); | |
187 | kfree(ipv6_route_table); | |
188 | kfree(ipv6_icmp_table); | |
89918fc2 DL |
189 | } |
190 | ||
191 | static struct pernet_operations ipv6_sysctl_net_ops = { | |
192 | .init = ipv6_sysctl_net_init, | |
193 | .exit = ipv6_sysctl_net_exit, | |
194 | }; | |
195 | ||
34ac2573 PE |
196 | static struct ctl_table_header *ip6_header; |
197 | ||
89918fc2 DL |
198 | int ipv6_sysctl_register(void) |
199 | { | |
c19a28e1 | 200 | int err = -ENOMEM; |
34ac2573 | 201 | |
43444757 | 202 | ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable); |
63159f29 | 203 | if (!ip6_header) |
34ac2573 PE |
204 | goto out; |
205 | ||
206 | err = register_pernet_subsys(&ipv6_sysctl_net_ops); | |
207 | if (err) | |
208 | goto err_pernet; | |
209 | out: | |
210 | return err; | |
211 | ||
212 | err_pernet: | |
213 | unregister_net_sysctl_table(ip6_header); | |
214 | goto out; | |
89918fc2 DL |
215 | } |
216 | ||
1da177e4 LT |
217 | void ipv6_sysctl_unregister(void) |
218 | { | |
34ac2573 | 219 | unregister_net_sysctl_table(ip6_header); |
89918fc2 | 220 | unregister_pernet_subsys(&ipv6_sysctl_net_ops); |
1da177e4 | 221 | } |