Commit | Line | Data |
---|---|---|
5f256bec EB |
1 | /* |
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 | ||
11 | struct net { | |
12 | atomic_t count; /* To decided when the network | |
13 | * namespace should be freed. | |
14 | */ | |
15 | atomic_t use_count; /* To track references we | |
16 | * destroy on demand | |
17 | */ | |
18 | struct list_head list; /* list of network namespaces */ | |
19 | struct work_struct work; /* work struct for freeing */ | |
20 | }; | |
21 | ||
22 | extern struct net init_net; | |
23 | extern struct list_head net_namespace_list; | |
24 | ||
25 | extern void __put_net(struct net *net); | |
26 | ||
27 | static inline struct net *get_net(struct net *net) | |
28 | { | |
29 | atomic_inc(&net->count); | |
30 | return net; | |
31 | } | |
32 | ||
33 | static inline void put_net(struct net *net) | |
34 | { | |
35 | if (atomic_dec_and_test(&net->count)) | |
36 | __put_net(net); | |
37 | } | |
38 | ||
39 | static inline struct net *hold_net(struct net *net) | |
40 | { | |
41 | atomic_inc(&net->use_count); | |
42 | return net; | |
43 | } | |
44 | ||
45 | static inline void release_net(struct net *net) | |
46 | { | |
47 | atomic_dec(&net->use_count); | |
48 | } | |
49 | ||
50 | extern void net_lock(void); | |
51 | extern void net_unlock(void); | |
52 | ||
53 | #define for_each_net(VAR) \ | |
54 | list_for_each_entry(VAR, &net_namespace_list, list) | |
55 | ||
56 | ||
57 | struct pernet_operations { | |
58 | struct list_head list; | |
59 | int (*init)(struct net *net); | |
60 | void (*exit)(struct net *net); | |
61 | }; | |
62 | ||
63 | extern int register_pernet_subsys(struct pernet_operations *); | |
64 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
65 | extern int register_pernet_device(struct pernet_operations *); | |
66 | extern void unregister_pernet_device(struct pernet_operations *); | |
67 | ||
68 | #endif /* __NET_NET_NAMESPACE_H */ |