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1/* -*- linux-c -*-
2 * sysctl_net.c: sysctl interface to net subsystem.
3 *
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net directories for each protocol family. [MS]
6 *
7 * $Log: sysctl_net.c,v $
8 * Revision 1.2 1996/05/08 20:24:40 shaver
9 * Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
10 * NET_IPV4_IP_FORWARD.
11 *
12 *
13 */
14
15#include <linux/mm.h>
16#include <linux/sysctl.h>
17#include <linux/nsproxy.h>
18
19#include <net/sock.h>
20
21#ifdef CONFIG_INET
22#include <net/ip.h>
23#endif
24
25#ifdef CONFIG_NET
26#include <linux/if_ether.h>
27#endif
28
29#ifdef CONFIG_TR
30#include <linux/if_tr.h>
31#endif
32
33static struct list_head *
34net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
35{
36 return &namespaces->net_ns->sysctl_table_headers;
37}
38
39static struct ctl_table_root net_sysctl_root = {
40 .lookup = net_ctl_header_lookup,
41};
42
43static int sysctl_net_init(struct net *net)
44{
45 INIT_LIST_HEAD(&net->sysctl_table_headers);
46 return 0;
47}
48
49static void sysctl_net_exit(struct net *net)
50{
51 WARN_ON(!list_empty(&net->sysctl_table_headers));
52 return;
53}
54
55static struct pernet_operations sysctl_pernet_ops = {
56 .init = sysctl_net_init,
57 .exit = sysctl_net_exit,
58};
59
60static __init int sysctl_init(void)
61{
62 int ret;
63 ret = register_pernet_subsys(&sysctl_pernet_ops);
64 if (ret)
65 goto out;
66 register_sysctl_root(&net_sysctl_root);
67out:
68 return ret;
69}
70subsys_initcall(sysctl_init);
71
72struct ctl_table_header *register_net_sysctl_table(struct net *net,
73 const struct ctl_path *path, struct ctl_table *table)
74{
75 struct nsproxy namespaces;
76 namespaces = *current->nsproxy;
77 namespaces.net_ns = net;
78 return __register_sysctl_paths(&net_sysctl_root,
79 &namespaces, path, table);
80}
81EXPORT_SYMBOL_GPL(register_net_sysctl_table);
82
83void unregister_net_sysctl_table(struct ctl_table_header *header)
84{
85 return unregister_sysctl_table(header);
86}
87EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);