2 * sysctl_net_ipv6.c: sysctl interface to net IPV6 subsystem.
5 * YOSHIFUJI Hideaki @USAGI: added icmp sysctl table.
9 #include <linux/sysctl.h>
10 #include <linux/in6.h>
11 #include <linux/ipv6.h>
12 #include <net/ndisc.h>
14 #include <net/addrconf.h>
15 #include <net/inet_frag.h>
17 static ctl_table ipv6_table_template[] = {
19 .ctl_name = NET_IPV6_ROUTE,
23 .child = ipv6_route_table_template
26 .ctl_name = NET_IPV6_ICMP,
30 .child = ipv6_icmp_table_template
33 .ctl_name = NET_IPV6_BINDV6ONLY,
34 .procname = "bindv6only",
35 .data = &init_net.ipv6.sysctl.bindv6only,
36 .maxlen = sizeof(int),
38 .proc_handler = &proc_dointvec
41 .ctl_name = NET_IPV6_MLD_MAX_MSF,
42 .procname = "mld_max_msf",
43 .data = &sysctl_mld_max_msf,
44 .maxlen = sizeof(int),
46 .proc_handler = &proc_dointvec
51 struct ctl_path net_ipv6_ctl_path[] = {
52 { .procname = "net", .ctl_name = CTL_NET, },
53 { .procname = "ipv6", .ctl_name = NET_IPV6, },
56 EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
58 static int ipv6_sysctl_net_init(struct net *net)
60 struct ctl_table *ipv6_table;
61 struct ctl_table *ipv6_route_table;
62 struct ctl_table *ipv6_icmp_table;
66 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
71 ipv6_route_table = ipv6_route_sysctl_init(net);
72 if (!ipv6_route_table)
74 ipv6_table[0].child = ipv6_route_table;
76 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
78 goto out_ipv6_route_table;
79 ipv6_table[1].child = ipv6_icmp_table;
81 ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
83 /* We don't want this value to be per namespace, it should be global
84 to all namespaces, so make it read-only when we are not in the
85 init network namespace */
87 ipv6_table[3].mode = 0444;
89 net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
91 if (!net->ipv6.sysctl.table)
92 goto out_ipv6_icmp_table;
99 kfree(ipv6_icmp_table);
100 out_ipv6_route_table:
101 kfree(ipv6_route_table);
107 static void ipv6_sysctl_net_exit(struct net *net)
109 struct ctl_table *ipv6_table;
110 struct ctl_table *ipv6_route_table;
111 struct ctl_table *ipv6_icmp_table;
113 ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
114 ipv6_route_table = ipv6_table[0].child;
115 ipv6_icmp_table = ipv6_table[1].child;
117 unregister_net_sysctl_table(net->ipv6.sysctl.table);
120 kfree(ipv6_route_table);
121 kfree(ipv6_icmp_table);
124 static struct pernet_operations ipv6_sysctl_net_ops = {
125 .init = ipv6_sysctl_net_init,
126 .exit = ipv6_sysctl_net_exit,
129 int ipv6_sysctl_register(void)
131 return register_pernet_subsys(&ipv6_sysctl_net_ops);
134 void ipv6_sysctl_unregister(void)
136 unregister_pernet_subsys(&ipv6_sysctl_net_ops);