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 /* _LINUX_FS_STRUCT_H */ 55