include/linux/fs_struct.h

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