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)
75 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
77 goto out_ipv6_route_table;
79 ipv6_route_table[0].data = &net->ipv6.sysctl.flush_delay;
80 /* ipv6_route_table[1].data will be handled when we have
81 routes per namespace */
82 ipv6_route_table[2].data = &net->ipv6.sysctl.ip6_rt_max_size;
83 ipv6_route_table[3].data = &net->ipv6.sysctl.ip6_rt_gc_min_interval;
84 ipv6_route_table[4].data = &net->ipv6.sysctl.ip6_rt_gc_timeout;
85 ipv6_route_table[5].data = &net->ipv6.sysctl.ip6_rt_gc_interval;
86 ipv6_route_table[6].data = &net->ipv6.sysctl.ip6_rt_gc_elasticity;
87 ipv6_route_table[7].data = &net->ipv6.sysctl.ip6_rt_mtu_expires;
88 ipv6_route_table[8].data = &net->ipv6.sysctl.ip6_rt_min_advmss;
89 ipv6_table[0].child = ipv6_route_table;
91 ipv6_icmp_table[0].data = &net->ipv6.sysctl.icmpv6_time;
92 ipv6_table[1].child = ipv6_icmp_table;
94 ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
96 /* We don't want this value to be per namespace, it should be global
97 to all namespaces, so make it read-only when we are not in the
98 init network namespace */
100 ipv6_table[3].mode = 0444;
102 net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
104 if (!net->ipv6.sysctl.table)
107 if (!net->ipv6.sysctl.table)
108 goto out_ipv6_icmp_table;
115 kfree(ipv6_icmp_table);
116 out_ipv6_route_table:
117 kfree(ipv6_route_table);
123 static void ipv6_sysctl_net_exit(struct net *net)
125 struct ctl_table *ipv6_table;
126 struct ctl_table *ipv6_route_table;
127 struct ctl_table *ipv6_icmp_table;
129 ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
130 ipv6_route_table = ipv6_table[0].child;
131 ipv6_icmp_table = ipv6_table[1].child;
133 unregister_net_sysctl_table(net->ipv6.sysctl.table);
136 kfree(ipv6_route_table);
137 kfree(ipv6_icmp_table);
140 static struct pernet_operations ipv6_sysctl_net_ops = {
141 .init = ipv6_sysctl_net_init,
142 .exit = ipv6_sysctl_net_exit,
145 int ipv6_sysctl_register(void)
147 return register_pernet_subsys(&ipv6_sysctl_net_ops);
150 void ipv6_sysctl_unregister(void)
152 unregister_pernet_subsys(&ipv6_sysctl_net_ops);