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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 | ||
457c4cbc | 11 | struct proc_dir_entry; |
5f256bec EB |
12 | struct net { |
13 | atomic_t count; /* To decided when the network | |
14 | * namespace should be freed. | |
15 | */ | |
16 | atomic_t use_count; /* To track references we | |
17 | * destroy on demand | |
18 | */ | |
19 | struct list_head list; /* list of network namespaces */ | |
20 | struct work_struct work; /* work struct for freeing */ | |
457c4cbc EB |
21 | |
22 | struct proc_dir_entry *proc_net; | |
23 | struct proc_dir_entry *proc_net_stat; | |
24 | struct proc_dir_entry *proc_net_root; | |
5f256bec EB |
25 | }; |
26 | ||
27 | extern struct net init_net; | |
28 | extern struct list_head net_namespace_list; | |
29 | ||
30 | extern void __put_net(struct net *net); | |
31 | ||
32 | static inline struct net *get_net(struct net *net) | |
33 | { | |
34 | atomic_inc(&net->count); | |
35 | return net; | |
36 | } | |
37 | ||
38 | static inline void put_net(struct net *net) | |
39 | { | |
40 | if (atomic_dec_and_test(&net->count)) | |
41 | __put_net(net); | |
42 | } | |
43 | ||
44 | static inline struct net *hold_net(struct net *net) | |
45 | { | |
46 | atomic_inc(&net->use_count); | |
47 | return net; | |
48 | } | |
49 | ||
50 | static inline void release_net(struct net *net) | |
51 | { | |
52 | atomic_dec(&net->use_count); | |
53 | } | |
54 | ||
55 | extern void net_lock(void); | |
56 | extern void net_unlock(void); | |
57 | ||
58 | #define for_each_net(VAR) \ | |
59 | list_for_each_entry(VAR, &net_namespace_list, list) | |
60 | ||
61 | ||
62 | struct pernet_operations { | |
63 | struct list_head list; | |
64 | int (*init)(struct net *net); | |
65 | void (*exit)(struct net *net); | |
66 | }; | |
67 | ||
68 | extern int register_pernet_subsys(struct pernet_operations *); | |
69 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
70 | extern int register_pernet_device(struct pernet_operations *); | |
71 | extern void unregister_pernet_device(struct pernet_operations *); | |
72 | ||
73 | #endif /* __NET_NET_NAMESPACE_H */ |