blob: f841d93bf987eb07ce03864be359be91b656583a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include <linux/in6.h>
11#include <linux/ipv6.h>
12#include <net/ndisc.h>
13#include <net/ipv6.h>
14#include <net/addrconf.h>
Pavel Emelyanov04128f22007-10-15 02:33:45 -070015#include <net/inet_frag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016
Daniel Lezcano760f2d02008-01-10 02:53:43 -080017static ctl_table ipv6_table_template[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070018 {
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 .procname = "route",
20 .maxlen = 0,
21 .mode = 0555,
Daniel Lezcano760f2d02008-01-10 02:53:43 -080022 .child = ipv6_route_table_template
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 },
24 {
Linus Torvalds1da177e2005-04-16 15:20:36 -070025 .procname = "icmp",
26 .maxlen = 0,
27 .mode = 0555,
Daniel Lezcano760f2d02008-01-10 02:53:43 -080028 .child = ipv6_icmp_table_template
Linus Torvalds1da177e2005-04-16 15:20:36 -070029 },
30 {
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 .procname = "bindv6only",
Daniel Lezcano99bc9c42008-01-10 02:54:53 -080032 .data = &init_net.ipv6.sysctl.bindv6only,
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 .maxlen = sizeof(int),
34 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -080035 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -080037 { }
Pavel Emelyanov34ac2572008-05-19 13:53:30 -070038};
39
Gerrit Renker81e43212009-07-28 09:48:07 +000040static ctl_table ipv6_rotable[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 {
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 .procname = "mld_max_msf",
43 .data = &sysctl_mld_max_msf,
44 .maxlen = sizeof(int),
45 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -080046 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -080048 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -070049};
50
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -080051struct ctl_path net_ipv6_ctl_path[] = {
Eric W. Biedermanf8572d82009-11-05 13:32:03 -080052 { .procname = "net", },
53 { .procname = "ipv6", },
Pavel Emelyanov4d43b782007-12-05 01:44:02 -080054 { },
55};
Pavel Emelyanov3d7cc2b2008-01-09 00:33:11 -080056EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
Pavel Emelyanov4d43b782007-12-05 01:44:02 -080057
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +000058static int __net_init ipv6_sysctl_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059{
Daniel Lezcano760f2d02008-01-10 02:53:43 -080060 struct ctl_table *ipv6_table;
61 struct ctl_table *ipv6_route_table;
62 struct ctl_table *ipv6_icmp_table;
63 int err;
64
65 err = -ENOMEM;
66 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
67 GFP_KERNEL);
68 if (!ipv6_table)
69 goto out;
70
71 ipv6_route_table = ipv6_route_sysctl_init(net);
72 if (!ipv6_route_table)
73 goto out_ipv6_table;
YOSHIFUJI Hideaki5ee09102008-02-28 00:24:28 +090074 ipv6_table[0].child = ipv6_route_table;
Daniel Lezcano760f2d02008-01-10 02:53:43 -080075
76 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
77 if (!ipv6_icmp_table)
78 goto out_ipv6_route_table;
Daniel Lezcano760f2d02008-01-10 02:53:43 -080079 ipv6_table[1].child = ipv6_icmp_table;
80
Daniel Lezcano99bc9c42008-01-10 02:54:53 -080081 ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
82
Daniel Lezcano760f2d02008-01-10 02:53:43 -080083 net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
84 ipv6_table);
85 if (!net->ipv6.sysctl.table)
Daniel Lezcano760f2d02008-01-10 02:53:43 -080086 goto out_ipv6_icmp_table;
Daniel Lezcano291480c2008-01-10 02:47:55 -080087
Daniel Lezcano760f2d02008-01-10 02:53:43 -080088 err = 0;
89out:
90 return err;
91
92out_ipv6_icmp_table:
93 kfree(ipv6_icmp_table);
94out_ipv6_route_table:
95 kfree(ipv6_route_table);
96out_ipv6_table:
97 kfree(ipv6_table);
98 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099}
100
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000101static void __net_exit ipv6_sysctl_net_exit(struct net *net)
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800102{
Daniel Lezcano760f2d02008-01-10 02:53:43 -0800103 struct ctl_table *ipv6_table;
104 struct ctl_table *ipv6_route_table;
105 struct ctl_table *ipv6_icmp_table;
106
107 ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
108 ipv6_route_table = ipv6_table[0].child;
109 ipv6_icmp_table = ipv6_table[1].child;
110
111 unregister_net_sysctl_table(net->ipv6.sysctl.table);
112
113 kfree(ipv6_table);
114 kfree(ipv6_route_table);
115 kfree(ipv6_icmp_table);
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800116}
117
118static struct pernet_operations ipv6_sysctl_net_ops = {
119 .init = ipv6_sysctl_net_init,
120 .exit = ipv6_sysctl_net_exit,
121};
122
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700123static struct ctl_table_header *ip6_header;
124
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800125int ipv6_sysctl_register(void)
126{
Fernando Carrijoc19a28e2009-01-07 18:09:08 -0800127 int err = -ENOMEM;
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700128
Gerrit Renker81e43212009-07-28 09:48:07 +0000129 ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700130 if (ip6_header == NULL)
131 goto out;
132
133 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
134 if (err)
135 goto err_pernet;
136out:
137 return err;
138
139err_pernet:
140 unregister_net_sysctl_table(ip6_header);
141 goto out;
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800142}
143
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144void ipv6_sysctl_unregister(void)
145{
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700146 unregister_net_sysctl_table(ip6_header);
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800147 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148}
Al Viroeeb61f72008-07-27 08:59:33 +0100149
150static struct ctl_table_header *ip6_base;
151
152int ipv6_static_sysctl_register(void)
153{
154 static struct ctl_table empty[1];
Al Viroce3113e2008-08-25 15:18:15 -0700155 ip6_base = register_sysctl_paths(net_ipv6_ctl_path, empty);
Al Viroeeb61f72008-07-27 08:59:33 +0100156 if (ip6_base == NULL)
157 return -ENOMEM;
158 return 0;
159}
160
161void ipv6_static_sysctl_unregister(void)
162{
163 unregister_net_sysctl_table(ip6_base);
164}