projects / deliverable / linux.git / blame
| 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 | ||
| 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; | |
| 881d966b EB |
25 | |
| 26 | struct list_head dev_base_head; | |
| 27 | struct hlist_head *dev_name_head; | |
| 28 | struct hlist_head *dev_index_head; | |
| 5f256bec EB |
29 | }; |
| 30 | ||
| 4fabcd71 DL |
31 | #ifdef CONFIG_NET |
| 32 | /* Init's network namespace */ | |
| 5f256bec | 33 | extern struct net init_net; |
| 4fabcd71 DL |
34 | #define INIT_NET_NS(net_ns) .net_ns = &init_net, |
| 35 | #else | |
| 36 | #define INIT_NET_NS(net_ns) | |
| 37 | #endif | |
| 38 | ||
| 5f256bec EB |
39 | extern struct list_head net_namespace_list; |
| 40 | ||
| 41 | extern void __put_net(struct net *net); | |
| 42 | ||
| 43 | static inline struct net *get_net(struct net *net) | |
| 44 | { | |
| 45 | atomic_inc(&net->count); | |
| 46 | return net; | |
| 47 | } | |
| 48 | ||
| 49 | static inline void put_net(struct net *net) | |
| 50 | { | |
| 51 | if (atomic_dec_and_test(&net->count)) | |
| 52 | __put_net(net); | |
| 53 | } | |
| 54 | ||
| 55 | static inline struct net *hold_net(struct net *net) | |
| 56 | { | |
| 57 | atomic_inc(&net->use_count); | |
| 58 | return net; | |
| 59 | } | |
| 60 | ||
| 61 | static inline void release_net(struct net *net) | |
| 62 | { | |
| 63 | atomic_dec(&net->use_count); | |
| 64 | } | |
| 65 | ||
| 66 | extern void net_lock(void); | |
| 67 | extern void net_unlock(void); | |
| 68 | ||
| 69 | #define for_each_net(VAR) \ | |
| 70 | list_for_each_entry(VAR, &net_namespace_list, list) | |
| 71 | ||
| 72 | ||
| 73 | struct pernet_operations { | |
| 74 | struct list_head list; | |
| 75 | int (*init)(struct net *net); | |
| 76 | void (*exit)(struct net *net); | |
| 77 | }; | |
| 78 | ||
| 79 | extern int register_pernet_subsys(struct pernet_operations *); | |
| 80 | extern void unregister_pernet_subsys(struct pernet_operations *); | |
| 81 | extern int register_pernet_device(struct pernet_operations *); | |
| 82 | extern void unregister_pernet_device(struct pernet_operations *); | |
| 83 | ||
| 84 | #endif /* __NET_NET_NAMESPACE_H */ |