blob: e85c48bd404f4036b0c4e7db1e29bd6a92192f75 [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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090012#include <linux/slab.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040013#include <linux/export.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <net/ndisc.h>
15#include <net/ipv6.h>
16#include <net/addrconf.h>
Pavel Emelyanov04128f22007-10-15 02:33:45 -070017#include <net/inet_frag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Daniel Lezcano760f2d02008-01-10 02:53:43 -080019static ctl_table ipv6_table_template[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 {
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 .procname = "bindv6only",
Daniel Lezcano99bc9c42008-01-10 02:54:53 -080022 .data = &init_net.ipv6.sysctl.bindv6only,
Linus Torvalds1da177e2005-04-16 15:20:36 -070023 .maxlen = sizeof(int),
24 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -080025 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -080027 { }
Pavel Emelyanov34ac2572008-05-19 13:53:30 -070028};
29
Gerrit Renker81e43212009-07-28 09:48:07 +000030static ctl_table ipv6_rotable[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 {
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 .procname = "mld_max_msf",
33 .data = &sysctl_mld_max_msf,
34 .maxlen = sizeof(int),
35 .mode = 0644,
Alexey Dobriyan6d9f2392008-11-03 18:21:05 -080036 .proc_handler = proc_dointvec
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 },
Eric W. Biedermanf8572d82009-11-05 13:32:03 -080038 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -070039};
40
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +000041static int __net_init ipv6_sysctl_net_init(struct net *net)
Linus Torvalds1da177e2005-04-16 15:20:36 -070042{
Daniel Lezcano760f2d02008-01-10 02:53:43 -080043 struct ctl_table *ipv6_table;
44 struct ctl_table *ipv6_route_table;
45 struct ctl_table *ipv6_icmp_table;
46 int err;
47
48 err = -ENOMEM;
49 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
50 GFP_KERNEL);
51 if (!ipv6_table)
52 goto out;
Eric W. Biederman6dceb032012-04-19 13:37:09 +000053 ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
Daniel Lezcano760f2d02008-01-10 02:53:43 -080054
55 ipv6_route_table = ipv6_route_sysctl_init(net);
56 if (!ipv6_route_table)
57 goto out_ipv6_table;
58
59 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
60 if (!ipv6_icmp_table)
61 goto out_ipv6_route_table;
Daniel Lezcano760f2d02008-01-10 02:53:43 -080062
Eric W. Biederman6dceb032012-04-19 13:37:09 +000063 net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
64 if (!net->ipv6.sysctl.hdr)
Daniel Lezcano760f2d02008-01-10 02:53:43 -080065 goto out_ipv6_icmp_table;
Daniel Lezcano291480c2008-01-10 02:47:55 -080066
Eric W. Biederman6dceb032012-04-19 13:37:09 +000067 net->ipv6.sysctl.route_hdr =
68 register_net_sysctl(net, "net/ipv6/route", ipv6_route_table);
69 if (!net->ipv6.sysctl.route_hdr)
70 goto out_unregister_ipv6_table;
71
72 net->ipv6.sysctl.icmp_hdr =
73 register_net_sysctl(net, "net/ipv6/icmp", ipv6_icmp_table);
74 if (!net->ipv6.sysctl.icmp_hdr)
75 goto out_unregister_route_table;
76
Daniel Lezcano760f2d02008-01-10 02:53:43 -080077 err = 0;
78out:
79 return err;
Eric W. Biederman6dceb032012-04-19 13:37:09 +000080out_unregister_route_table:
81 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
82out_unregister_ipv6_table:
83 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
Daniel Lezcano760f2d02008-01-10 02:53:43 -080084out_ipv6_icmp_table:
85 kfree(ipv6_icmp_table);
86out_ipv6_route_table:
87 kfree(ipv6_route_table);
88out_ipv6_table:
89 kfree(ipv6_table);
90 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091}
92
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +000093static void __net_exit ipv6_sysctl_net_exit(struct net *net)
Daniel Lezcano89918fc2008-01-10 02:49:34 -080094{
Daniel Lezcano760f2d02008-01-10 02:53:43 -080095 struct ctl_table *ipv6_table;
96 struct ctl_table *ipv6_route_table;
97 struct ctl_table *ipv6_icmp_table;
98
Eric W. Biederman6dceb032012-04-19 13:37:09 +000099 ipv6_table = net->ipv6.sysctl.hdr->ctl_table_arg;
100 ipv6_route_table = net->ipv6.sysctl.route_hdr->ctl_table_arg;
101 ipv6_icmp_table = net->ipv6.sysctl.icmp_hdr->ctl_table_arg;
Daniel Lezcano760f2d02008-01-10 02:53:43 -0800102
Eric W. Biederman6dceb032012-04-19 13:37:09 +0000103 unregister_net_sysctl_table(net->ipv6.sysctl.icmp_hdr);
104 unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
105 unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
Daniel Lezcano760f2d02008-01-10 02:53:43 -0800106
107 kfree(ipv6_table);
108 kfree(ipv6_route_table);
109 kfree(ipv6_icmp_table);
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800110}
111
112static struct pernet_operations ipv6_sysctl_net_ops = {
113 .init = ipv6_sysctl_net_init,
114 .exit = ipv6_sysctl_net_exit,
115};
116
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700117static struct ctl_table_header *ip6_header;
118
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800119int ipv6_sysctl_register(void)
120{
Fernando Carrijoc19a28e2009-01-07 18:09:08 -0800121 int err = -ENOMEM;
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700122
Eric W. Biederman43444752012-04-19 13:22:55 +0000123 ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700124 if (ip6_header == NULL)
125 goto out;
126
127 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
128 if (err)
129 goto err_pernet;
130out:
131 return err;
132
133err_pernet:
134 unregister_net_sysctl_table(ip6_header);
135 goto out;
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800136}
137
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138void ipv6_sysctl_unregister(void)
139{
Pavel Emelyanov34ac2572008-05-19 13:53:30 -0700140 unregister_net_sysctl_table(ip6_header);
Daniel Lezcano89918fc2008-01-10 02:49:34 -0800141 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}