blob: 72fad1a0956b86c5502bb85dc634a79cd6dbf46b [file] [log] [blame]
Eric W. Biederman5f256be2007-09-12 11:50:50 +02001/*
2 * Operations on the network namespace
3 */
4#ifndef __NET_NET_NAMESPACE_H
5#define __NET_NET_NAMESPACE_H
6
7#include <asm/atomic.h>
8#include <linux/workqueue.h>
9#include <linux/list.h>
10
Pavel Emelyanov8efa6e92008-03-31 19:41:14 -070011#include <net/netns/core.h>
Denis V. Luneva0a53c82007-12-11 04:19:17 -080012#include <net/netns/unix.h>
Denis V. Lunev2aaef4e2007-12-11 04:19:54 -080013#include <net/netns/packet.h>
Pavel Emelyanov8afd3512007-12-16 13:29:36 -080014#include <net/netns/ipv4.h>
Daniel Lezcanob0f159d2008-01-10 02:49:06 -080015#include <net/netns/ipv6.h>
Pavel Emelyanov67019cc2008-04-13 22:28:42 -070016#include <net/netns/dccp.h>
Alexey Dobriyan8d870052008-01-31 04:02:13 -080017#include <net/netns/x_tables.h>
Denis V. Luneva0a53c82007-12-11 04:19:17 -080018
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020019struct proc_dir_entry;
Eric W. Biederman2774c7a2007-09-26 22:10:56 -070020struct net_device;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -080021struct sock;
Pavel Emelyanov1597fbc2007-12-01 23:51:01 +110022struct ctl_table_header;
23
Eric W. Biederman5f256be2007-09-12 11:50:50 +020024struct net {
25 atomic_t count; /* To decided when the network
26 * namespace should be freed.
27 */
28 atomic_t use_count; /* To track references we
29 * destroy on demand
30 */
31 struct list_head list; /* list of network namespaces */
32 struct work_struct work; /* work struct for freeing */
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020033
34 struct proc_dir_entry *proc_net;
35 struct proc_dir_entry *proc_net_stat;
Eric W. Biederman881d9662007-09-17 11:56:21 -070036
Eric W. Biederman95bdfcc2007-11-30 23:55:42 +110037 struct list_head sysctl_table_headers;
38
Eric W. Biederman2774c7a2007-09-26 22:10:56 -070039 struct net_device *loopback_dev; /* The loopback */
40
Eric W. Biederman881d9662007-09-17 11:56:21 -070041 struct list_head dev_base_head;
42 struct hlist_head *dev_name_head;
43 struct hlist_head *dev_index_head;
Denis V. Lunev97c53ca2007-11-19 22:26:51 -080044
Denis V. Lunev5fd30ee2008-01-10 03:20:28 -080045 /* core fib_rules */
46 struct list_head rules_ops;
47 spinlock_t rules_mod_lock;
48
Denis V. Lunev97c53ca2007-11-19 22:26:51 -080049 struct sock *rtnl; /* rtnetlink socket */
Denis V. Lunevd12d01d2007-11-19 22:28:35 -080050
Pavel Emelyanov8efa6e92008-03-31 19:41:14 -070051 struct netns_core core;
Denis V. Lunev2aaef4e2007-12-11 04:19:54 -080052 struct netns_packet packet;
Denis V. Luneva0a53c82007-12-11 04:19:17 -080053 struct netns_unix unx;
Pavel Emelyanov8afd3512007-12-16 13:29:36 -080054 struct netns_ipv4 ipv4;
Daniel Lezcanob0f159d2008-01-10 02:49:06 -080055#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
56 struct netns_ipv6 ipv6;
57#endif
Pavel Emelyanov67019cc2008-04-13 22:28:42 -070058#if defined(CONFIG_IP_DCCP) || defined(CONFIG_IP_DCCP_MODULE)
59 struct netns_dccp dccp;
60#endif
Alexey Dobriyan8d870052008-01-31 04:02:13 -080061#ifdef CONFIG_NETFILTER
62 struct netns_xt xt;
63#endif
Eric W. Biederman5f256be2007-09-12 11:50:50 +020064};
65
Denis V. Lunev225c0a02008-04-02 00:09:29 -070066
Denis V. Lunevc0f39322008-04-02 00:10:28 -070067#include <linux/seq_file_net.h>
68
Daniel Lezcano4fabcd72007-09-13 09:16:29 +020069/* Init's network namespace */
Eric W. Biederman5f256be2007-09-12 11:50:50 +020070extern struct net init_net;
Denis V. Luneva4aa8342008-04-03 13:04:33 -070071
72#ifdef CONFIG_NET
Daniel Lezcano4fabcd72007-09-13 09:16:29 +020073#define INIT_NET_NS(net_ns) .net_ns = &init_net,
Daniel Lezcano4fabcd72007-09-13 09:16:29 +020074
Eric W. Biederman9dd776b2007-09-26 22:04:26 -070075extern struct net *copy_net_ns(unsigned long flags, struct net *net_ns);
Denis V. Lunev225c0a02008-04-02 00:09:29 -070076
77#else /* CONFIG_NET */
78
79#define INIT_NET_NS(net_ns)
80
Eric W. Biederman9dd776b2007-09-26 22:04:26 -070081static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns)
82{
83 /* There is nothing to copy so this is a noop */
84 return net_ns;
85}
Denis V. Lunev225c0a02008-04-02 00:09:29 -070086#endif /* CONFIG_NET */
87
88
89extern struct list_head net_namespace_list;
Eric W. Biederman9dd776b2007-09-26 22:04:26 -070090
Pavel Emelyanovd4655792007-11-01 00:43:49 -070091#ifdef CONFIG_NET_NS
Eric W. Biederman5f256be2007-09-12 11:50:50 +020092extern void __put_net(struct net *net);
93
94static inline struct net *get_net(struct net *net)
95{
96 atomic_inc(&net->count);
97 return net;
98}
99
Eric W. Biederman077130c2007-09-13 09:18:57 +0200100static inline struct net *maybe_get_net(struct net *net)
101{
102 /* Used when we know struct net exists but we
103 * aren't guaranteed a previous reference count
104 * exists. If the reference count is zero this
105 * function fails and returns NULL.
106 */
107 if (!atomic_inc_not_zero(&net->count))
108 net = NULL;
109 return net;
110}
111
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200112static inline void put_net(struct net *net)
113{
114 if (atomic_dec_and_test(&net->count))
115 __put_net(net);
116}
117
118static inline struct net *hold_net(struct net *net)
119{
120 atomic_inc(&net->use_count);
121 return net;
122}
123
124static inline void release_net(struct net *net)
125{
126 atomic_dec(&net->use_count);
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200127}
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +0900128
129static inline
130int net_eq(const struct net *net1, const struct net *net2)
131{
132 return net1 == net2;
133}
Pavel Emelyanovd4655792007-11-01 00:43:49 -0700134#else
135static inline struct net *get_net(struct net *net)
136{
137 return net;
138}
139
140static inline void put_net(struct net *net)
141{
142}
143
144static inline struct net *hold_net(struct net *net)
145{
146 return net;
147}
148
149static inline void release_net(struct net *net)
150{
151}
152
153static inline struct net *maybe_get_net(struct net *net)
154{
155 return net;
156}
YOSHIFUJI Hideaki878628f2008-03-26 03:57:35 +0900157
158static inline
159int net_eq(const struct net *net1, const struct net *net2)
160{
161 return 1;
162}
Pavel Emelyanovd4655792007-11-01 00:43:49 -0700163#endif
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200164
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200165#define for_each_net(VAR) \
166 list_for_each_entry(VAR, &net_namespace_list, list)
167
Pavel Emelyanov46650792007-10-08 20:38:39 -0700168#ifdef CONFIG_NET_NS
169#define __net_init
170#define __net_exit
Denis V. Lunev022cbae2007-11-13 03:23:50 -0800171#define __net_initdata
Pavel Emelyanov46650792007-10-08 20:38:39 -0700172#else
173#define __net_init __init
174#define __net_exit __exit_refok
Denis V. Lunev022cbae2007-11-13 03:23:50 -0800175#define __net_initdata __initdata
Pavel Emelyanov46650792007-10-08 20:38:39 -0700176#endif
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200177
178struct pernet_operations {
179 struct list_head list;
180 int (*init)(struct net *net);
181 void (*exit)(struct net *net);
182};
183
184extern int register_pernet_subsys(struct pernet_operations *);
185extern void unregister_pernet_subsys(struct pernet_operations *);
186extern int register_pernet_device(struct pernet_operations *);
187extern void unregister_pernet_device(struct pernet_operations *);
Pavel Emelyanovc93cf612008-04-15 00:35:23 -0700188extern int register_pernet_gen_device(int *id, struct pernet_operations *);
189extern void unregister_pernet_gen_device(int id, struct pernet_operations *);
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200190
Eric W. Biederman95bdfcc2007-11-30 23:55:42 +1100191struct ctl_path;
192struct ctl_table;
193struct ctl_table_header;
194extern struct ctl_table_header *register_net_sysctl_table(struct net *net,
195 const struct ctl_path *path, struct ctl_table *table);
196extern void unregister_net_sysctl_table(struct ctl_table_header *header);
197
Eric W. Biederman5f256be2007-09-12 11:50:50 +0200198#endif /* __NET_NET_NAMESPACE_H */