[IPV6]: Sparse: Declare non-static ipv6_{route,icmp,frag}_sysctl_init() in header.
[linux-2.6.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         {
41                 .ctl_name       = NET_IPV6_IP6FRAG_HIGH_THRESH,
42                 .procname       = "ip6frag_high_thresh",
43                 .data           = &init_net.ipv6.sysctl.frags.high_thresh,
44                 .maxlen         = sizeof(int),
45                 .mode           = 0644,
46                 .proc_handler   = &proc_dointvec
47         },
48         {
49                 .ctl_name       = NET_IPV6_IP6FRAG_LOW_THRESH,
50                 .procname       = "ip6frag_low_thresh",
51                 .data           = &init_net.ipv6.sysctl.frags.low_thresh,
52                 .maxlen         = sizeof(int),
53                 .mode           = 0644,
54                 .proc_handler   = &proc_dointvec
55         },
56         {
57                 .ctl_name       = NET_IPV6_IP6FRAG_TIME,
58                 .procname       = "ip6frag_time",
59                 .data           = &init_net.ipv6.sysctl.frags.timeout,
60                 .maxlen         = sizeof(int),
61                 .mode           = 0644,
62                 .proc_handler   = &proc_dointvec_jiffies,
63                 .strategy       = &sysctl_jiffies,
64         },
65         {
66                 .ctl_name       = NET_IPV6_IP6FRAG_SECRET_INTERVAL,
67                 .procname       = "ip6frag_secret_interval",
68                 .data           = &init_net.ipv6.sysctl.frags.secret_interval,
69                 .maxlen         = sizeof(int),
70                 .mode           = 0644,
71                 .proc_handler   = &proc_dointvec_jiffies,
72                 .strategy       = &sysctl_jiffies
73         },
74         {
75                 .ctl_name       = NET_IPV6_MLD_MAX_MSF,
76                 .procname       = "mld_max_msf",
77                 .data           = &sysctl_mld_max_msf,
78                 .maxlen         = sizeof(int),
79                 .mode           = 0644,
80                 .proc_handler   = &proc_dointvec
81         },
82         { .ctl_name = 0 }
83 };
84
85 struct ctl_path net_ipv6_ctl_path[] = {
86         { .procname = "net", .ctl_name = CTL_NET, },
87         { .procname = "ipv6", .ctl_name = NET_IPV6, },
88         { },
89 };
90 EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
91
92 static int ipv6_sysctl_net_init(struct net *net)
93 {
94         struct ctl_table *ipv6_table;
95         struct ctl_table *ipv6_route_table;
96         struct ctl_table *ipv6_icmp_table;
97         int err;
98
99         err = -ENOMEM;
100         ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
101                              GFP_KERNEL);
102         if (!ipv6_table)
103                 goto out;
104
105         ipv6_route_table = ipv6_route_sysctl_init(net);
106         if (!ipv6_route_table)
107                 goto out_ipv6_table;
108
109         ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
110         if (!ipv6_icmp_table)
111                 goto out_ipv6_route_table;
112
113         ipv6_route_table[0].data = &net->ipv6.sysctl.flush_delay;
114         /* ipv6_route_table[1].data will be handled when we have
115            routes per namespace */
116         ipv6_route_table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
117         ipv6_route_table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
118         ipv6_route_table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
119         ipv6_route_table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
120         ipv6_route_table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
121         ipv6_route_table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
122         ipv6_route_table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
123         ipv6_table[0].child = ipv6_route_table;
124
125         ipv6_icmp_table[0].data = &net->ipv6.sysctl.icmpv6_time;
126         ipv6_table[1].child = ipv6_icmp_table;
127
128         ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
129         ipv6_table[3].data = &net->ipv6.sysctl.frags.high_thresh;
130         ipv6_table[4].data = &net->ipv6.sysctl.frags.low_thresh;
131         ipv6_table[5].data = &net->ipv6.sysctl.frags.timeout;
132         ipv6_table[6].data = &net->ipv6.sysctl.frags.secret_interval;
133
134         /* We don't want this value to be per namespace, it should be global
135            to all namespaces, so make it read-only when we are not in the
136            init network namespace */
137         if (net != &init_net)
138                 ipv6_table[7].mode = 0444;
139
140         net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
141                                                            ipv6_table);
142         if (!net->ipv6.sysctl.table)
143                 return -ENOMEM;
144
145         if (!net->ipv6.sysctl.table)
146                 goto out_ipv6_icmp_table;
147
148         err = 0;
149 out:
150         return err;
151
152 out_ipv6_icmp_table:
153         kfree(ipv6_icmp_table);
154 out_ipv6_route_table:
155         kfree(ipv6_route_table);
156 out_ipv6_table:
157         kfree(ipv6_table);
158         goto out;
159 }
160
161 static void ipv6_sysctl_net_exit(struct net *net)
162 {
163         struct ctl_table *ipv6_table;
164         struct ctl_table *ipv6_route_table;
165         struct ctl_table *ipv6_icmp_table;
166
167         ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
168         ipv6_route_table = ipv6_table[0].child;
169         ipv6_icmp_table = ipv6_table[1].child;
170
171         unregister_net_sysctl_table(net->ipv6.sysctl.table);
172
173         kfree(ipv6_table);
174         kfree(ipv6_route_table);
175         kfree(ipv6_icmp_table);
176 }
177
178 static struct pernet_operations ipv6_sysctl_net_ops = {
179         .init = ipv6_sysctl_net_init,
180         .exit = ipv6_sysctl_net_exit,
181 };
182
183 int ipv6_sysctl_register(void)
184 {
185         return register_pernet_subsys(&ipv6_sysctl_net_ops);
186 }
187
188 void ipv6_sysctl_unregister(void)
189 {
190         unregister_pernet_subsys(&ipv6_sysctl_net_ops);
191 }