Commit | Line | Data |
---|---|---|
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 | * | |
1da177e4 LT |
7 | * Revision 1.2 1996/05/08 20:24:40 shaver |
8 | * Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and | |
9 | * NET_IPV4_IP_FORWARD. | |
10 | * | |
11 | * | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/mm.h> |
15 | #include <linux/sysctl.h> | |
95bdfccb | 16 | #include <linux/nsproxy.h> |
1da177e4 | 17 | |
496a22b0 RK |
18 | #include <net/sock.h> |
19 | ||
1da177e4 | 20 | #ifdef CONFIG_INET |
20380731 | 21 | #include <net/ip.h> |
1da177e4 LT |
22 | #endif |
23 | ||
1da177e4 | 24 | #ifdef CONFIG_NET |
20380731 | 25 | #include <linux/if_ether.h> |
1da177e4 LT |
26 | #endif |
27 | ||
28 | #ifdef CONFIG_TR | |
20380731 | 29 | #include <linux/if_tr.h> |
1da177e4 LT |
30 | #endif |
31 | ||
95bdfccb EB |
32 | static struct list_head * |
33 | net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces) | |
34 | { | |
35 | return &namespaces->net_ns->sysctl_table_headers; | |
36 | } | |
37 | ||
38 | static struct ctl_table_root net_sysctl_root = { | |
39 | .lookup = net_ctl_header_lookup, | |
40 | }; | |
41 | ||
d62c612e PE |
42 | static LIST_HEAD(net_sysctl_ro_tables); |
43 | static struct list_head *net_ctl_ro_header_lookup(struct ctl_table_root *root, | |
44 | struct nsproxy *namespaces) | |
45 | { | |
46 | return &net_sysctl_ro_tables; | |
47 | } | |
48 | ||
49 | static int net_ctl_ro_header_perms(struct ctl_table_root *root, | |
50 | struct nsproxy *namespaces, struct ctl_table *table) | |
51 | { | |
52 | if (namespaces->net_ns == &init_net) | |
53 | return table->mode; | |
54 | else | |
55 | return table->mode & ~0222; | |
56 | } | |
57 | ||
58 | static struct ctl_table_root net_sysctl_ro_root = { | |
59 | .lookup = net_ctl_ro_header_lookup, | |
60 | .permissions = net_ctl_ro_header_perms, | |
61 | }; | |
62 | ||
95bdfccb EB |
63 | static int sysctl_net_init(struct net *net) |
64 | { | |
65 | INIT_LIST_HEAD(&net->sysctl_table_headers); | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static void sysctl_net_exit(struct net *net) | |
70 | { | |
71 | WARN_ON(!list_empty(&net->sysctl_table_headers)); | |
72 | return; | |
73 | } | |
74 | ||
75 | static struct pernet_operations sysctl_pernet_ops = { | |
76 | .init = sysctl_net_init, | |
77 | .exit = sysctl_net_exit, | |
78 | }; | |
79 | ||
80 | static __init int sysctl_init(void) | |
81 | { | |
82 | int ret; | |
83 | ret = register_pernet_subsys(&sysctl_pernet_ops); | |
84 | if (ret) | |
85 | goto out; | |
86 | register_sysctl_root(&net_sysctl_root); | |
d62c612e | 87 | register_sysctl_root(&net_sysctl_ro_root); |
95bdfccb EB |
88 | out: |
89 | return ret; | |
90 | } | |
91 | subsys_initcall(sysctl_init); | |
92 | ||
93 | struct ctl_table_header *register_net_sysctl_table(struct net *net, | |
94 | const struct ctl_path *path, struct ctl_table *table) | |
95 | { | |
96 | struct nsproxy namespaces; | |
97 | namespaces = *current->nsproxy; | |
98 | namespaces.net_ns = net; | |
99 | return __register_sysctl_paths(&net_sysctl_root, | |
100 | &namespaces, path, table); | |
101 | } | |
102 | EXPORT_SYMBOL_GPL(register_net_sysctl_table); | |
103 | ||
d62c612e PE |
104 | struct ctl_table_header *register_net_sysctl_rotable(const |
105 | struct ctl_path *path, struct ctl_table *table) | |
106 | { | |
107 | return __register_sysctl_paths(&net_sysctl_ro_root, | |
108 | &init_nsproxy, path, table); | |
109 | } | |
110 | EXPORT_SYMBOL_GPL(register_net_sysctl_rotable); | |
111 | ||
95bdfccb EB |
112 | void unregister_net_sysctl_table(struct ctl_table_header *header) |
113 | { | |
ab59859d | 114 | unregister_sysctl_table(header); |
95bdfccb EB |
115 | } |
116 | EXPORT_SYMBOL_GPL(unregister_net_sysctl_table); |