2 * sysctl_net.c: sysctl interface to net subsystem.
4 * Begun April 1, 1996, Mike Shaver.
5 * Added /proc/sys/net directories for each protocol family. [MS]
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.
16 #include <linux/sysctl.h>
17 #include <linux/nsproxy.h>
26 #include <linux/if_ether.h>
30 #include <linux/if_tr.h>
33 static struct list_head *
34 net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
36 return &namespaces->net_ns->sysctl_table_headers;
39 static struct ctl_table_root net_sysctl_root = {
40 .lookup = net_ctl_header_lookup,
43 static int sysctl_net_init(struct net *net)
45 INIT_LIST_HEAD(&net->sysctl_table_headers);
49 static void sysctl_net_exit(struct net *net)
51 WARN_ON(!list_empty(&net->sysctl_table_headers));
55 static struct pernet_operations sysctl_pernet_ops = {
56 .init = sysctl_net_init,
57 .exit = sysctl_net_exit,
60 static __init int sysctl_init(void)
63 ret = register_pernet_subsys(&sysctl_pernet_ops);
66 register_sysctl_root(&net_sysctl_root);
70 subsys_initcall(sysctl_init);
72 struct ctl_table_header *register_net_sysctl_table(struct net *net,
73 const struct ctl_path *path, struct ctl_table *table)
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);
81 EXPORT_SYMBOL_GPL(register_net_sysctl_table);
83 void unregister_net_sysctl_table(struct ctl_table_header *header)
85 return unregister_sysctl_table(header);
87 EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);