remove lots of double-semicolons
[linux-3.10.git] / net / ipv6 / sysctl_net_ipv6.c
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 <net/ndisc.h>
13 #include <net/ipv6.h>
14 #include <net/addrconf.h>
15 #include <net/inet_frag.h>
16
17 static ctl_table ipv6_table_template[] = {
18         {
19                 .ctl_name       = NET_IPV6_ROUTE,
20                 .procname       = "route",
21                 .maxlen         = 0,
22                 .mode           = 0555,
23                 .child          = ipv6_route_table_template
24         },
25         {
26                 .ctl_name       = NET_IPV6_ICMP,
27                 .procname       = "icmp",
28                 .maxlen         = 0,
29                 .mode           = 0555,
30                 .child          = ipv6_icmp_table_template
31         },
32         {
33                 .ctl_name       = NET_IPV6_BINDV6ONLY,
34                 .procname       = "bindv6only",
35                 .data           = &init_net.ipv6.sysctl.bindv6only,
36                 .maxlen         = sizeof(int),
37                 .mode           = 0644,
38                 .proc_handler   = proc_dointvec
39         },
40         { .ctl_name = 0 }
41 };
42
43 static ctl_table ipv6_table[] = {
44         {
45                 .ctl_name       = NET_IPV6_MLD_MAX_MSF,
46                 .procname       = "mld_max_msf",
47                 .data           = &sysctl_mld_max_msf,
48                 .maxlen         = sizeof(int),
49                 .mode           = 0644,
50                 .proc_handler   = proc_dointvec
51         },
52         { .ctl_name = 0 }
53 };
54
55 struct ctl_path net_ipv6_ctl_path[] = {
56         { .procname = "net", .ctl_name = CTL_NET, },
57         { .procname = "ipv6", .ctl_name = NET_IPV6, },
58         { },
59 };
60 EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
61
62 static int ipv6_sysctl_net_init(struct net *net)
63 {
64         struct ctl_table *ipv6_table;
65         struct ctl_table *ipv6_route_table;
66         struct ctl_table *ipv6_icmp_table;
67         int err;
68
69         err = -ENOMEM;
70         ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
71                              GFP_KERNEL);
72         if (!ipv6_table)
73                 goto out;
74
75         ipv6_route_table = ipv6_route_sysctl_init(net);
76         if (!ipv6_route_table)
77                 goto out_ipv6_table;
78         ipv6_table[0].child = ipv6_route_table;
79
80         ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
81         if (!ipv6_icmp_table)
82                 goto out_ipv6_route_table;
83         ipv6_table[1].child = ipv6_icmp_table;
84
85         ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
86
87         net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
88                                                            ipv6_table);
89         if (!net->ipv6.sysctl.table)
90                 goto out_ipv6_icmp_table;
91
92         err = 0;
93 out:
94         return err;
95
96 out_ipv6_icmp_table:
97         kfree(ipv6_icmp_table);
98 out_ipv6_route_table:
99         kfree(ipv6_route_table);
100 out_ipv6_table:
101         kfree(ipv6_table);
102         goto out;
103 }
104
105 static void ipv6_sysctl_net_exit(struct net *net)
106 {
107         struct ctl_table *ipv6_table;
108         struct ctl_table *ipv6_route_table;
109         struct ctl_table *ipv6_icmp_table;
110
111         ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
112         ipv6_route_table = ipv6_table[0].child;
113         ipv6_icmp_table = ipv6_table[1].child;
114
115         unregister_net_sysctl_table(net->ipv6.sysctl.table);
116
117         kfree(ipv6_table);
118         kfree(ipv6_route_table);
119         kfree(ipv6_icmp_table);
120 }
121
122 static struct pernet_operations ipv6_sysctl_net_ops = {
123         .init = ipv6_sysctl_net_init,
124         .exit = ipv6_sysctl_net_exit,
125 };
126
127 static struct ctl_table_header *ip6_header;
128
129 int ipv6_sysctl_register(void)
130 {
131         int err = -ENOMEM;
132
133         ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_table);
134         if (ip6_header == NULL)
135                 goto out;
136
137         err = register_pernet_subsys(&ipv6_sysctl_net_ops);
138         if (err)
139                 goto err_pernet;
140 out:
141         return err;
142
143 err_pernet:
144         unregister_net_sysctl_table(ip6_header);
145         goto out;
146 }
147
148 void ipv6_sysctl_unregister(void)
149 {
150         unregister_net_sysctl_table(ip6_header);
151         unregister_pernet_subsys(&ipv6_sysctl_net_ops);
152 }
153
154 static struct ctl_table_header *ip6_base;
155
156 int ipv6_static_sysctl_register(void)
157 {
158         static struct ctl_table empty[1];
159         ip6_base = register_sysctl_paths(net_ipv6_ctl_path, empty);
160         if (ip6_base == NULL)
161                 return -ENOMEM;
162         return 0;
163 }
164
165 void ipv6_static_sysctl_unregister(void)
166 {
167         unregister_net_sysctl_table(ip6_base);
168 }