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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> |
1da177e4 | 18 | |
fe2c6338 | 19 | static struct ctl_table ipv6_table_template[] = { |
1da177e4 | 20 | { |
1da177e4 | 21 | .procname = "bindv6only", |
99bc9c4e | 22 | .data = &init_net.ipv6.sysctl.bindv6only, |
1da177e4 LT |
23 | .maxlen = sizeof(int), |
24 | .mode = 0644, | |
6d9f239a | 25 | .proc_handler = proc_dointvec |
1da177e4 | 26 | }, |
509aba3b FLB |
27 | { |
28 | .procname = "anycast_src_echo_reply", | |
ec35b61e | 29 | .data = &init_net.ipv6.sysctl.anycast_src_echo_reply, |
509aba3b FLB |
30 | .maxlen = sizeof(int), |
31 | .mode = 0644, | |
32 | .proc_handler = proc_dointvec | |
33 | }, | |
6444f72b FF |
34 | { |
35 | .procname = "flowlabel_consistency", | |
36 | .data = &init_net.ipv6.sysctl.flowlabel_consistency, | |
37 | .maxlen = sizeof(int), | |
38 | .mode = 0644, | |
39 | .proc_handler = proc_dointvec | |
40 | }, | |
cb1ce2ef TH |
41 | { |
42 | .procname = "auto_flowlabels", | |
43 | .data = &init_net.ipv6.sysctl.auto_flowlabels, | |
44 | .maxlen = sizeof(int), | |
45 | .mode = 0644, | |
46 | .proc_handler = proc_dointvec | |
47 | }, | |
e110861f LC |
48 | { |
49 | .procname = "fwmark_reflect", | |
50 | .data = &init_net.ipv6.sysctl.fwmark_reflect, | |
51 | .maxlen = sizeof(int), | |
52 | .mode = 0644, | |
53 | .proc_handler = proc_dointvec | |
54 | }, | |
f8572d8f | 55 | { } |
34ac2573 PE |
56 | }; |
57 | ||
fe2c6338 | 58 | static struct ctl_table ipv6_rotable[] = { |
1da177e4 | 59 | { |
1da177e4 LT |
60 | .procname = "mld_max_msf", |
61 | .data = &sysctl_mld_max_msf, | |
62 | .maxlen = sizeof(int), | |
63 | .mode = 0644, | |
6d9f239a | 64 | .proc_handler = proc_dointvec |
1da177e4 | 65 | }, |
f8572d8f | 66 | { } |
1da177e4 LT |
67 | }; |
68 | ||
2c8c1e72 | 69 | static int __net_init ipv6_sysctl_net_init(struct net *net) |
1da177e4 | 70 | { |
760f2d01 DL |
71 | struct ctl_table *ipv6_table; |
72 | struct ctl_table *ipv6_route_table; | |
73 | struct ctl_table *ipv6_icmp_table; | |
74 | int err; | |
75 | ||
76 | err = -ENOMEM; | |
77 | ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template), | |
78 | GFP_KERNEL); | |
79 | if (!ipv6_table) | |
80 | goto out; | |
6dceb036 | 81 | ipv6_table[0].data = &net->ipv6.sysctl.bindv6only; |
ec35b61e | 82 | ipv6_table[1].data = &net->ipv6.sysctl.anycast_src_echo_reply; |
6444f72b | 83 | ipv6_table[2].data = &net->ipv6.sysctl.flowlabel_consistency; |
cb1ce2ef | 84 | ipv6_table[3].data = &net->ipv6.sysctl.auto_flowlabels; |
d247b6ab | 85 | ipv6_table[4].data = &net->ipv6.sysctl.fwmark_reflect; |
760f2d01 DL |
86 | |
87 | ipv6_route_table = ipv6_route_sysctl_init(net); | |
88 | if (!ipv6_route_table) | |
89 | goto out_ipv6_table; | |
90 | ||
91 | ipv6_icmp_table = ipv6_icmp_sysctl_init(net); | |
92 | if (!ipv6_icmp_table) | |
93 | goto out_ipv6_route_table; | |
760f2d01 | 94 | |
6dceb036 EB |
95 | net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table); |
96 | if (!net->ipv6.sysctl.hdr) | |
760f2d01 DL |
97 | goto out_ipv6_icmp_table; |
98 | ||
6dceb036 EB |
99 | net->ipv6.sysctl.route_hdr = |
100 | register_net_sysctl(net, "net/ipv6/route", ipv6_route_table); | |
101 | if (!net->ipv6.sysctl.route_hdr) | |
102 | goto out_unregister_ipv6_table; | |
103 | ||
104 | net->ipv6.sysctl.icmp_hdr = | |
105 | register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table); | |
106 | if (!net->ipv6.sysctl.icmp_hdr) | |
107 | goto out_unregister_route_table; | |
108 | ||
760f2d01 DL |
109 | err = 0; |
110 | out: | |
111 | return err; | |
6dceb036 EB |
112 | out_unregister_route_table: |
113 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); | |
114 | out_unregister_ipv6_table: | |
115 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); | |
760f2d01 DL |
116 | out_ipv6_icmp_table: |
117 | kfree(ipv6_icmp_table); | |
118 | out_ipv6_route_table: | |
119 | kfree(ipv6_route_table); | |
120 | out_ipv6_table: | |
121 | kfree(ipv6_table); | |
122 | goto out; | |
1da177e4 LT |
123 | } |
124 | ||
2c8c1e72 | 125 | static void __net_exit ipv6_sysctl_net_exit(struct net *net) |
89918fc2 | 126 | { |
760f2d01 DL |
127 | struct ctl_table *ipv6_table; |
128 | struct ctl_table *ipv6_route_table; | |
129 | struct ctl_table *ipv6_icmp_table; | |
130 | ||
6dceb036 EB |
131 | ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg; |
132 | ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg; | |
133 | ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg; | |
760f2d01 | 134 | |
6dceb036 EB |
135 | unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr); |
136 | unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr); | |
137 | unregister_net_sysctl_table(net->ipv6.sysctl.hdr); | |
760f2d01 DL |
138 | |
139 | kfree(ipv6_table); | |
140 | kfree(ipv6_route_table); | |
141 | kfree(ipv6_icmp_table); | |
89918fc2 DL |
142 | } |
143 | ||
144 | static struct pernet_operations ipv6_sysctl_net_ops = { | |
145 | .init = ipv6_sysctl_net_init, | |
146 | .exit = ipv6_sysctl_net_exit, | |
147 | }; | |
148 | ||
34ac2573 PE |
149 | static struct ctl_table_header *ip6_header; |
150 | ||
89918fc2 DL |
151 | int ipv6_sysctl_register(void) |
152 | { | |
c19a28e1 | 153 | int err = -ENOMEM; |
34ac2573 | 154 | |
43444757 | 155 | ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable); |
34ac2573 PE |
156 | if (ip6_header == NULL) |
157 | goto out; | |
158 | ||
159 | err = register_pernet_subsys(&ipv6_sysctl_net_ops); | |
160 | if (err) | |
161 | goto err_pernet; | |
162 | out: | |
163 | return err; | |
164 | ||
165 | err_pernet: | |
166 | unregister_net_sysctl_table(ip6_header); | |
167 | goto out; | |
89918fc2 DL |
168 | } |
169 | ||
1da177e4 LT |
170 | void ipv6_sysctl_unregister(void) |
171 | { | |
34ac2573 | 172 | unregister_net_sysctl_table(ip6_header); |
89918fc2 | 173 | unregister_pernet_subsys(&ipv6_sysctl_net_ops); |
1da177e4 | 174 | } |