| Kirill Korotaev | 6b3286e | 2006-12-08 02:37:56 -0800 | [diff] [blame] | 1 | #ifndef _NAMESPACE_H_ |
| 2 | #define _NAMESPACE_H_ |
| 3 | #ifdef __KERNEL__ |
| 4 | |
| 5 | #include <linux/mount.h> |
| 6 | #include <linux/sched.h> |
| 7 | #include <linux/nsproxy.h> |
| 8 | |
| 9 | struct mnt_namespace { |
| 10 | atomic_t count; |
| 11 | struct vfsmount * root; |
| 12 | struct list_head list; |
| 13 | wait_queue_head_t poll; |
| 14 | int event; |
| 15 | }; |
| 16 | |
| 17 | extern int copy_mnt_ns(int, struct task_struct *); |
| 18 | extern void __put_mnt_ns(struct mnt_namespace *ns); |
| 19 | extern struct mnt_namespace *dup_mnt_ns(struct task_struct *, |
| 20 | struct fs_struct *); |
| 21 | |
| 22 | static inline void put_mnt_ns(struct mnt_namespace *ns) |
| 23 | { |
| 24 | if (atomic_dec_and_lock(&ns->count, &vfsmount_lock)) |
| 25 | /* releases vfsmount_lock */ |
| 26 | __put_mnt_ns(ns); |
| 27 | } |
| 28 | |
| 29 | static inline void exit_mnt_ns(struct task_struct *p) |
| 30 | { |
| 31 | struct mnt_namespace *ns = p->nsproxy->mnt_ns; |
| 32 | if (ns) |
| 33 | put_mnt_ns(ns); |
| 34 | } |
| 35 | |
| 36 | static inline void get_mnt_ns(struct mnt_namespace *ns) |
| 37 | { |
| 38 | atomic_inc(&ns->count); |
| 39 | } |
| 40 | |
| 41 | #endif |
| 42 | #endif |