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 | |
bf36076a EB |
19 | static struct ctl_table empty[1]; |
20 | ||
9d2a8fa9 EB |
21 | static ctl_table ipv6_static_skeleton[] = { |
22 | { | |
23 | .procname = "neigh", | |
24 | .maxlen = 0, | |
25 | .mode = 0555, | |
26 | .child = empty, | |
27 | }, | |
28 | { } | |
29 | }; | |
30 | ||
760f2d01 | 31 | static ctl_table ipv6_table_template[] = { |
1da177e4 | 32 | { |
1da177e4 LT |
33 | .procname = "route", |
34 | .maxlen = 0, | |
35 | .mode = 0555, | |
760f2d01 | 36 | .child = ipv6_route_table_template |
1da177e4 LT |
37 | }, |
38 | { | |
1da177e4 LT |
39 | .procname = "icmp", |
40 | .maxlen = 0, | |
41 | .mode = 0555, | |
760f2d01 | 42 | .child = ipv6_icmp_table_template |
1da177e4 LT |
43 | }, |
44 | { | |
1da177e4 | 45 | .procname = "bindv6only", |
99bc9c4e | 46 | .data = &init_net.ipv6.sysctl.bindv6only, |
1da177e4 LT |
47 | .maxlen = sizeof(int), |
48 | .mode = 0644, | |
6d9f239a | 49 | .proc_handler = proc_dointvec |
1da177e4 | 50 | }, |
f8572d8f | 51 | { } |
34ac2573 PE |
52 | }; |
53 | ||
81e43213 | 54 | static ctl_table ipv6_rotable[] = { |
1da177e4 | 55 | { |
1da177e4 LT |
56 | .procname = "mld_max_msf", |
57 | .data = &sysctl_mld_max_msf, | |
58 | .maxlen = sizeof(int), | |
59 | .mode = 0644, | |
6d9f239a | 60 | .proc_handler = proc_dointvec |
1da177e4 | 61 | }, |
f8572d8f | 62 | { } |
1da177e4 LT |
63 | }; |
64 | ||
3d7cc2ba | 65 | struct ctl_path net_ipv6_ctl_path[] = { |
f8572d8f EB |
66 | { .procname = "net", }, |
67 | { .procname = "ipv6", }, | |
4d43b78a | 68 | { }, |
1da177e4 | 69 | }; |
3d7cc2ba | 70 | EXPORT_SYMBOL_GPL(net_ipv6_ctl_path); |
1da177e4 | 71 | |
2c8c1e72 | 72 | static int __net_init ipv6_sysctl_net_init(struct net *net) |
1da177e4 | 73 | { |
760f2d01 DL |
74 | struct ctl_table *ipv6_table; |
75 | struct ctl_table *ipv6_route_table; | |
76 | struct ctl_table *ipv6_icmp_table; | |
77 | int err; | |
78 | ||
79 | err = -ENOMEM; | |
80 | ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template), | |
81 | GFP_KERNEL); | |
82 | if (!ipv6_table) | |
83 | goto out; | |
84 | ||
85 | ipv6_route_table = ipv6_route_sysctl_init(net); | |
86 | if (!ipv6_route_table) | |
87 | goto out_ipv6_table; | |
5ee09105 | 88 | ipv6_table[0].child = ipv6_route_table; |
760f2d01 DL |
89 | |
90 | ipv6_icmp_table = ipv6_icmp_sysctl_init(net); | |
91 | if (!ipv6_icmp_table) | |
92 | goto out_ipv6_route_table; | |
760f2d01 DL |
93 | ipv6_table[1].child = ipv6_icmp_table; |
94 | ||
99bc9c4e DL |
95 | ipv6_table[2].data = &net->ipv6.sysctl.bindv6only; |
96 | ||
760f2d01 DL |
97 | net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path, |
98 | ipv6_table); | |
760f2d01 DL |
99 | if (!net->ipv6.sysctl.table) |
100 | goto out_ipv6_icmp_table; | |
101 | ||
102 | err = 0; | |
103 | out: | |
104 | return err; | |
291480c0 | 105 | |
760f2d01 DL |
106 | out_ipv6_icmp_table: |
107 | kfree(ipv6_icmp_table); | |
108 | out_ipv6_route_table: | |
109 | kfree(ipv6_route_table); | |
110 | out_ipv6_table: | |
111 | kfree(ipv6_table); | |
112 | goto out; | |
1da177e4 LT |
113 | } |
114 | ||
2c8c1e72 | 115 | static void __net_exit ipv6_sysctl_net_exit(struct net *net) |
89918fc2 | 116 | { |
760f2d01 DL |
117 | struct ctl_table *ipv6_table; |
118 | struct ctl_table *ipv6_route_table; | |
119 | struct ctl_table *ipv6_icmp_table; | |
120 | ||
121 | ipv6_table = net->ipv6.sysctl.table->ctl_table_arg; | |
122 | ipv6_route_table = ipv6_table[0].child; | |
123 | ipv6_icmp_table = ipv6_table[1].child; | |
124 | ||
125 | unregister_net_sysctl_table(net->ipv6.sysctl.table); | |
126 | ||
127 | kfree(ipv6_table); | |
128 | kfree(ipv6_route_table); | |
129 | kfree(ipv6_icmp_table); | |
89918fc2 DL |
130 | } |
131 | ||
132 | static struct pernet_operations ipv6_sysctl_net_ops = { | |
133 | .init = ipv6_sysctl_net_init, | |
134 | .exit = ipv6_sysctl_net_exit, | |
135 | }; | |
136 | ||
34ac2573 PE |
137 | static struct ctl_table_header *ip6_header; |
138 | ||
89918fc2 DL |
139 | int ipv6_sysctl_register(void) |
140 | { | |
c19a28e1 | 141 | int err = -ENOMEM; |
34ac2573 | 142 | |
81e43213 | 143 | ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable); |
34ac2573 PE |
144 | if (ip6_header == NULL) |
145 | goto out; | |
146 | ||
147 | err = register_pernet_subsys(&ipv6_sysctl_net_ops); | |
148 | if (err) | |
149 | goto err_pernet; | |
150 | out: | |
151 | return err; | |
152 | ||
153 | err_pernet: | |
154 | unregister_net_sysctl_table(ip6_header); | |
155 | goto out; | |
89918fc2 DL |
156 | } |
157 | ||
1da177e4 LT |
158 | void ipv6_sysctl_unregister(void) |
159 | { | |
34ac2573 | 160 | unregister_net_sysctl_table(ip6_header); |
89918fc2 | 161 | unregister_pernet_subsys(&ipv6_sysctl_net_ops); |
1da177e4 | 162 | } |
eeb61f71 AV |
163 | |
164 | static struct ctl_table_header *ip6_base; | |
165 | ||
166 | int ipv6_static_sysctl_register(void) | |
167 | { | |
9d2a8fa9 | 168 | ip6_base = register_sysctl_paths(net_ipv6_ctl_path, ipv6_static_skeleton); |
eeb61f71 AV |
169 | if (ip6_base == NULL) |
170 | return -ENOMEM; | |
171 | return 0; | |
172 | } | |
173 | ||
174 | void ipv6_static_sysctl_unregister(void) | |
175 | { | |
176 | unregister_net_sysctl_table(ip6_base); | |
177 | } |