| Nicholas Flintham | 1e3d311 | 2013-04-10 10:48:38 +0100 | [diff] [blame^] | 1 | #ifndef _LINUX_FS_STRUCT_H |
| 2 | #define _LINUX_FS_STRUCT_H |
| 3 | |
| 4 | #include <linux/path.h> |
| 5 | #include <linux/spinlock.h> |
| 6 | #include <linux/seqlock.h> |
| 7 | |
| 8 | struct fs_struct { |
| 9 | int users; |
| 10 | spinlock_t lock; |
| 11 | seqcount_t seq; |
| 12 | int umask; |
| 13 | int in_exec; |
| 14 | struct path root, pwd; |
| 15 | }; |
| 16 | |
| 17 | extern struct kmem_cache *fs_cachep; |
| 18 | |
| 19 | extern void exit_fs(struct task_struct *); |
| 20 | extern void set_fs_root(struct fs_struct *, struct path *); |
| 21 | extern void set_fs_pwd(struct fs_struct *, struct path *); |
| 22 | extern struct fs_struct *copy_fs_struct(struct fs_struct *); |
| 23 | extern void free_fs_struct(struct fs_struct *); |
| 24 | extern void daemonize_fs_struct(void); |
| 25 | extern int unshare_fs_struct(void); |
| 26 | |
| 27 | static inline void get_fs_root(struct fs_struct *fs, struct path *root) |
| 28 | { |
| 29 | spin_lock(&fs->lock); |
| 30 | *root = fs->root; |
| 31 | path_get(root); |
| 32 | spin_unlock(&fs->lock); |
| 33 | } |
| 34 | |
| 35 | static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd) |
| 36 | { |
| 37 | spin_lock(&fs->lock); |
| 38 | *pwd = fs->pwd; |
| 39 | path_get(pwd); |
| 40 | spin_unlock(&fs->lock); |
| 41 | } |
| 42 | |
| 43 | static inline void get_fs_root_and_pwd(struct fs_struct *fs, struct path *root, |
| 44 | struct path *pwd) |
| 45 | { |
| 46 | spin_lock(&fs->lock); |
| 47 | *root = fs->root; |
| 48 | path_get(root); |
| 49 | *pwd = fs->pwd; |
| 50 | path_get(pwd); |
| 51 | spin_unlock(&fs->lock); |
| 52 | } |
| 53 | |
| 54 | #endif |