2 * Operations on the network namespace
4 #ifndef __NET_NET_NAMESPACE_H
5 #define __NET_NET_NAMESPACE_H
7 #include <asm/atomic.h>
8 #include <linux/workqueue.h>
9 #include <linux/list.h>
11 struct proc_dir_entry;
13 atomic_t count; /* To decided when the network
14 * namespace should be freed.
16 atomic_t use_count; /* To track references we
19 struct list_head list; /* list of network namespaces */
20 struct work_struct work; /* work struct for freeing */
22 struct proc_dir_entry *proc_net;
23 struct proc_dir_entry *proc_net_stat;
24 struct proc_dir_entry *proc_net_root;
27 extern struct net init_net;
28 extern struct list_head net_namespace_list;
30 extern void __put_net(struct net *net);
32 static inline struct net *get_net(struct net *net)
34 atomic_inc(&net->count);
38 static inline void put_net(struct net *net)
40 if (atomic_dec_and_test(&net->count))
44 static inline struct net *hold_net(struct net *net)
46 atomic_inc(&net->use_count);
50 static inline void release_net(struct net *net)
52 atomic_dec(&net->use_count);
55 extern void net_lock(void);
56 extern void net_unlock(void);
58 #define for_each_net(VAR) \
59 list_for_each_entry(VAR, &net_namespace_list, list)
62 struct pernet_operations {
63 struct list_head list;
64 int (*init)(struct net *net);
65 void (*exit)(struct net *net);
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 *);
73 #endif /* __NET_NET_NAMESPACE_H */