sctp: Do not account for sizeof(struct sk_buff) in estimated rwnd
[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 <linux/slab.h>
13 #include <net/ndisc.h>
14 #include <net/ipv6.h>
15 #include <net/addrconf.h>
16 #include <net/inet_frag.h>
17
18 static struct ctl_table empty[1];
19
20 static ctl_table ipv6_static_skeleton[] = {
21         {
22                 .procname       = "neigh",
23                 .maxlen         = 0,
24                 .mode           = 0555,
25                 .child          = empty,
26         },
27         { }
28 };
29
30 static ctl_table ipv6_table_template[] = {
31         {
32                 .procname       = "route",
33                 .maxlen         = 0,
34                 .mode           = 0555,
35                 .child          = ipv6_route_table_template
36         },
37         {
38                 .procname       = "icmp",
39                 .maxlen         = 0,
40                 .mode           = 0555,
41                 .child          = ipv6_icmp_table_template
42         },
43         {
44                 .procname       = "bindv6only",
45                 .data           = &init_net.ipv6.sysctl.bindv6only,
46                 .maxlen         = sizeof(int),
47                 .mode           = 0644,
48                 .proc_handler   = proc_dointvec
49         },
50         { }
51 };
52
53 static ctl_table ipv6_rotable[] = {
54         {
55                 .procname       = "mld_max_msf",
56                 .data           = &sysctl_mld_max_msf,
57                 .maxlen         = sizeof(int),
58                 .mode           = 0644,
59                 .proc_handler   = proc_dointvec
60         },
61         { }
62 };
63
64 struct ctl_path net_ipv6_ctl_path[] = {
65         { .procname = "net", },
66         { .procname = "ipv6", },
67         { },
68 };
69 EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
70
71 static int __net_init ipv6_sysctl_net_init(struct net *net)
72 {
73         struct ctl_table *ipv6_table;
74         struct ctl_table *ipv6_route_table;
75         struct ctl_table *ipv6_icmp_table;
76         int err;
77
78         err = -ENOMEM;
79         ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
80                              GFP_KERNEL);
81         if (!ipv6_table)
82                 goto out;
83
84         ipv6_route_table = ipv6_route_sysctl_init(net);
85         if (!ipv6_route_table)
86                 goto out_ipv6_table;
87         ipv6_table[0].child = ipv6_route_table;
88
89         ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
90         if (!ipv6_icmp_table)
91                 goto out_ipv6_route_table;
92         ipv6_table[1].child = ipv6_icmp_table;
93
94         ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
95
96         net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
97                                                            ipv6_table);
98         if (!net->ipv6.sysctl.table)
99                 goto out_ipv6_icmp_table;
100
101         err = 0;
102 out:
103         return err;
104
105 out_ipv6_icmp_table:
106         kfree(ipv6_icmp_table);
107 out_ipv6_route_table:
108         kfree(ipv6_route_table);
109 out_ipv6_table:
110         kfree(ipv6_table);
111         goto out;
112 }
113
114 static void __net_exit ipv6_sysctl_net_exit(struct net *net)
115 {
116         struct ctl_table *ipv6_table;
117         struct ctl_table *ipv6_route_table;
118         struct ctl_table *ipv6_icmp_table;
119
120         ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
121         ipv6_route_table = ipv6_table[0].child;
122         ipv6_icmp_table = ipv6_table[1].child;
123
124         unregister_net_sysctl_table(net->ipv6.sysctl.table);
125
126         kfree(ipv6_table);
127         kfree(ipv6_route_table);
128         kfree(ipv6_icmp_table);
129 }
130
131 static struct pernet_operations ipv6_sysctl_net_ops = {
132         .init = ipv6_sysctl_net_init,
133         .exit = ipv6_sysctl_net_exit,
134 };
135
136 static struct ctl_table_header *ip6_header;
137
138 int ipv6_sysctl_register(void)
139 {
140         int err = -ENOMEM;
141
142         ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
143         if (ip6_header == NULL)
144                 goto out;
145
146         err = register_pernet_subsys(&ipv6_sysctl_net_ops);
147         if (err)
148                 goto err_pernet;
149 out:
150         return err;
151
152 err_pernet:
153         unregister_net_sysctl_table(ip6_header);
154         goto out;
155 }
156
157 void ipv6_sysctl_unregister(void)
158 {
159         unregister_net_sysctl_table(ip6_header);
160         unregister_pernet_subsys(&ipv6_sysctl_net_ops);
161 }
162
163 static struct ctl_table_header *ip6_base;
164
165 int ipv6_static_sysctl_register(void)
166 {
167         ip6_base = register_sysctl_paths(net_ipv6_ctl_path, ipv6_static_skeleton);
168         if (ip6_base == NULL)
169                 return -ENOMEM;
170         return 0;
171 }
172
173 void ipv6_static_sysctl_unregister(void)
174 {
175         unregister_net_sysctl_table(ip6_base);
176 }