Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/jesse/openvswitch
[profile/ivi/kernel-adaptation-intel-automotive.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 <linux/export.h>
14 #include <net/ndisc.h>
15 #include <net/ipv6.h>
16 #include <net/addrconf.h>
17 #include <net/inet_frag.h>
18
19 static ctl_table ipv6_table_template[] = {
20         {
21                 .procname       = "bindv6only",
22                 .data           = &init_net.ipv6.sysctl.bindv6only,
23                 .maxlen         = sizeof(int),
24                 .mode           = 0644,
25                 .proc_handler   = proc_dointvec
26         },
27         { }
28 };
29
30 static ctl_table ipv6_rotable[] = {
31         {
32                 .procname       = "mld_max_msf",
33                 .data           = &sysctl_mld_max_msf,
34                 .maxlen         = sizeof(int),
35                 .mode           = 0644,
36                 .proc_handler   = proc_dointvec
37         },
38         { }
39 };
40
41 static int __net_init ipv6_sysctl_net_init(struct net *net)
42 {
43         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;
53         ipv6_table[0].data = &net->ipv6.sysctl.bindv6only;
54
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;
62
63         net->ipv6.sysctl.hdr = register_net_sysctl(net, "net/ipv6", ipv6_table);
64         if (!net->ipv6.sysctl.hdr)
65                 goto out_ipv6_icmp_table;
66
67         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
77         err = 0;
78 out:
79         return err;
80 out_unregister_route_table:
81         unregister_net_sysctl_table(net->ipv6.sysctl.route_hdr);
82 out_unregister_ipv6_table:
83         unregister_net_sysctl_table(net->ipv6.sysctl.hdr);
84 out_ipv6_icmp_table:
85         kfree(ipv6_icmp_table);
86 out_ipv6_route_table:
87         kfree(ipv6_route_table);
88 out_ipv6_table:
89         kfree(ipv6_table);
90         goto out;
91 }
92
93 static void __net_exit ipv6_sysctl_net_exit(struct net *net)
94 {
95         struct ctl_table *ipv6_table;
96         struct ctl_table *ipv6_route_table;
97         struct ctl_table *ipv6_icmp_table;
98
99         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;
102
103         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);
106
107         kfree(ipv6_table);
108         kfree(ipv6_route_table);
109         kfree(ipv6_icmp_table);
110 }
111
112 static struct pernet_operations ipv6_sysctl_net_ops = {
113         .init = ipv6_sysctl_net_init,
114         .exit = ipv6_sysctl_net_exit,
115 };
116
117 static struct ctl_table_header *ip6_header;
118
119 int ipv6_sysctl_register(void)
120 {
121         int err = -ENOMEM;
122
123         ip6_header = register_net_sysctl(&init_net, "net/ipv6", ipv6_rotable);
124         if (ip6_header == NULL)
125                 goto out;
126
127         err = register_pernet_subsys(&ipv6_sysctl_net_ops);
128         if (err)
129                 goto err_pernet;
130 out:
131         return err;
132
133 err_pernet:
134         unregister_net_sysctl_table(ip6_header);
135         goto out;
136 }
137
138 void ipv6_sysctl_unregister(void)
139 {
140         unregister_net_sysctl_table(ip6_header);
141         unregister_pernet_subsys(&ipv6_sysctl_net_ops);
142 }