tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 <net/ndisc.h>
14#include <net/ipv6.h>
15#include <net/addrconf.h>
16#include <net/inet_frag.h>
17
18static struct ctl_table empty[1];
19
20static ctl_table ipv6_static_skeleton[] = {
21 {
22 .procname = "neigh",
23 .maxlen = 0,
24 .mode = 0555,
25 .child = empty,
26 },
27 { }
28};
29
30static ctl_table ipv6_table_template[] = {
31 {
32 .procname = "route",
33 .maxlen = 0,
34 .mode = 0555,
35 .child = ipv6_route_table_template
36 },
37 {
38 .procname = "icmp",
39 .maxlen = 0,
40 .mode = 0555,
41 .child = ipv6_icmp_table_template
42 },
43 {
44 .procname = "bindv6only",
45 .data = &init_net.ipv6.sysctl.bindv6only,
46 .maxlen = sizeof(int),
47 .mode = 0644,
48 .proc_handler = proc_dointvec
49 },
50 { }
51};
52
53static ctl_table ipv6_rotable[] = {
54 {
55 .procname = "mld_max_msf",
56 .data = &sysctl_mld_max_msf,
57 .maxlen = sizeof(int),
58 .mode = 0644,
59 .proc_handler = proc_dointvec
60 },
61 { }
62};
63
64struct ctl_path net_ipv6_ctl_path[] = {
65 { .procname = "net", },
66 { .procname = "ipv6", },
67 { },
68};
69EXPORT_SYMBOL_GPL(net_ipv6_ctl_path);
70
71static int __net_init ipv6_sysctl_net_init(struct net *net)
72{
73 struct ctl_table *ipv6_table;
74 struct ctl_table *ipv6_route_table;
75 struct ctl_table *ipv6_icmp_table;
76 int err;
77
78 err = -ENOMEM;
79 ipv6_table = kmemdup(ipv6_table_template, sizeof(ipv6_table_template),
80 GFP_KERNEL);
81 if (!ipv6_table)
82 goto out;
83
84 ipv6_route_table = ipv6_route_sysctl_init(net);
85 if (!ipv6_route_table)
86 goto out_ipv6_table;
87 ipv6_table[0].child = ipv6_route_table;
88
89 ipv6_icmp_table = ipv6_icmp_sysctl_init(net);
90 if (!ipv6_icmp_table)
91 goto out_ipv6_route_table;
92 ipv6_table[1].child = ipv6_icmp_table;
93
94 ipv6_table[2].data = &net->ipv6.sysctl.bindv6only;
95
96 net->ipv6.sysctl.table = register_net_sysctl_table(net, net_ipv6_ctl_path,
97 ipv6_table);
98 if (!net->ipv6.sysctl.table)
99 goto out_ipv6_icmp_table;
100
101 err = 0;
102out:
103 return err;
104
105out_ipv6_icmp_table:
106 kfree(ipv6_icmp_table);
107out_ipv6_route_table:
108 kfree(ipv6_route_table);
109out_ipv6_table:
110 kfree(ipv6_table);
111 goto out;
112}
113
114static void __net_exit ipv6_sysctl_net_exit(struct net *net)
115{
116 struct ctl_table *ipv6_table;
117 struct ctl_table *ipv6_route_table;
118 struct ctl_table *ipv6_icmp_table;
119
120 ipv6_table = net->ipv6.sysctl.table->ctl_table_arg;
121 ipv6_route_table = ipv6_table[0].child;
122 ipv6_icmp_table = ipv6_table[1].child;
123
124 unregister_net_sysctl_table(net->ipv6.sysctl.table);
125
126 kfree(ipv6_table);
127 kfree(ipv6_route_table);
128 kfree(ipv6_icmp_table);
129}
130
131static struct pernet_operations ipv6_sysctl_net_ops = {
132 .init = ipv6_sysctl_net_init,
133 .exit = ipv6_sysctl_net_exit,
134};
135
136static struct ctl_table_header *ip6_header;
137
138int ipv6_sysctl_register(void)
139{
140 int err = -ENOMEM;
141
142 ip6_header = register_net_sysctl_rotable(net_ipv6_ctl_path, ipv6_rotable);
143 if (ip6_header == NULL)
144 goto out;
145
146 err = register_pernet_subsys(&ipv6_sysctl_net_ops);
147 if (err)
148 goto err_pernet;
149out:
150 return err;
151
152err_pernet:
153 unregister_net_sysctl_table(ip6_header);
154 goto out;
155}
156
157void ipv6_sysctl_unregister(void)
158{
159 unregister_net_sysctl_table(ip6_header);
160 unregister_pernet_subsys(&ipv6_sysctl_net_ops);
161}
162
163static struct ctl_table_header *ip6_base;
164
165int ipv6_static_sysctl_register(void)
166{
167 ip6_base = register_sysctl_paths(net_ipv6_ctl_path, ipv6_static_skeleton);
168 if (ip6_base == NULL)
169 return -ENOMEM;
170 return 0;
171}
172
173void ipv6_static_sysctl_unregister(void)
174{
175 unregister_net_sysctl_table(ip6_base);
176}