blob: 665e856675a4e449268789a295a40e119ee876b9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* -*- 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/mm.h>
16#include <linux/sysctl.h>
Eric W. Biederman95bdfcc2007-11-30 23:55:42 +110017#include <linux/nsproxy.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
Russell King496a22b2005-10-03 14:16:34 -070019#include <net/sock.h>
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#ifdef CONFIG_INET
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030022#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#endif
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#ifdef CONFIG_NET
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030026#include <linux/if_ether.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#endif
28
29#ifdef CONFIG_TR
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030030#include <linux/if_tr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#endif
32
Eric W. Biederman95bdfcc2007-11-30 23:55:42 +110033static 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);