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1da177e4 LT |
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 | ||
1da177e4 LT |
15 | #include <linux/mm.h> |
16 | #include <linux/sysctl.h> | |
95bdfccb | 17 | #include <linux/nsproxy.h> |
1da177e4 | 18 | |
496a22b0 RK |
19 | #include <net/sock.h> |
20 | ||
1da177e4 | 21 | #ifdef CONFIG_INET |
20380731 | 22 | #include <net/ip.h> |
1da177e4 LT |
23 | #endif |
24 | ||
1da177e4 | 25 | #ifdef CONFIG_NET |
20380731 | 26 | #include <linux/if_ether.h> |
1da177e4 LT |
27 | #endif |
28 | ||
29 | #ifdef CONFIG_TR | |
20380731 | 30 | #include <linux/if_tr.h> |
1da177e4 LT |
31 | #endif |
32 | ||
95bdfccb EB |
33 | static struct list_head * |
34 | net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces) | |
35 | { | |
36 | return &namespaces->net_ns->sysctl_table_headers; | |
37 | } | |
38 | ||
39 | static struct ctl_table_root net_sysctl_root = { | |
40 | .lookup = net_ctl_header_lookup, | |
41 | }; | |
42 | ||
43 | static int sysctl_net_init(struct net *net) | |
44 | { | |
45 | INIT_LIST_HEAD(&net->sysctl_table_headers); | |
46 | return 0; | |
47 | } | |
48 | ||
49 | static void sysctl_net_exit(struct net *net) | |
50 | { | |
51 | WARN_ON(!list_empty(&net->sysctl_table_headers)); | |
52 | return; | |
53 | } | |
54 | ||
55 | static struct pernet_operations sysctl_pernet_ops = { | |
56 | .init = sysctl_net_init, | |
57 | .exit = sysctl_net_exit, | |
58 | }; | |
59 | ||
60 | static __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); | |
67 | out: | |
68 | return ret; | |
69 | } | |
70 | subsys_initcall(sysctl_init); | |
71 | ||
72 | struct 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 | } | |
81 | EXPORT_SYMBOL_GPL(register_net_sysctl_table); | |
82 | ||
83 | void unregister_net_sysctl_table(struct ctl_table_header *header) | |
84 | { | |
85 | return unregister_sysctl_table(header); | |
86 | } | |
87 | EXPORT_SYMBOL_GPL(unregister_net_sysctl_table); |