#ifndef _LINUX_NAMEI_H
  #define _LINUX_NAMEI_H

  #include <linux/dcache.h>

  #include <linux/linkage.h>

  #include <linux/path.h>

  
  struct vfsmount;
  
  struct open_intent {
  	int	flags;
  	int	create_mode;

  	struct file *file;

  };

  enum { MAX_NESTED_LINKS = 8 };

  
  struct nameidata {

  	struct path	path;

  	struct qstr	last;

  	struct path	root;

  	unsigned int	flags;
  	int		last_type;
  	unsigned	depth;
  	char *saved_names[MAX_NESTED_LINKS + 1];
  
  	/* Intent data */
  	union {
  		struct open_intent open;
  	} intent;
  };
  
  /*
   * Type of the last component on LOOKUP_PARENT
   */
  enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
  
  /*
   * The bitmask for a lookup event:
   *  - follow links at the end
   *  - require a directory
   *  - ending slashes ok even for nonexistent files

   *  - internal "there are more path components" flag

   *  - locked when lookup done with dcache_lock held
   *  - dentry cache is untrusted; force a real lookup
   */
  #define LOOKUP_FOLLOW		 1
  #define LOOKUP_DIRECTORY	 2
  #define LOOKUP_CONTINUE		 4
  #define LOOKUP_PARENT		16

  #define LOOKUP_REVAL		64
  /*
   * Intent data
   */

  #define LOOKUP_OPEN		0x0100
  #define LOOKUP_CREATE		0x0200
  #define LOOKUP_EXCL		0x0400

  #define LOOKUP_RENAME_TARGET	0x0800

  extern int user_path_at(int, const char __user *, unsigned, struct path *);
  
  #define user_path(name, path) user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW, path)
  #define user_lpath(name, path) user_path_at(AT_FDCWD, name, 0, path)
  #define user_path_dir(name, path) \
  	user_path_at(AT_FDCWD, name, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, path)

  extern int kern_path(const char *, unsigned, struct path *);

  extern int path_lookup(const char *, unsigned, struct nameidata *);

  extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
  			   const char *, unsigned int, struct nameidata *);

  extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry *dentry,
  		int (*open)(struct inode *, struct file *));

  extern struct dentry *lookup_one_len(const char *, struct dentry *, int);

  extern int follow_down(struct path *);

  extern int follow_up(struct path *);

  
  extern struct dentry *lock_rename(struct dentry *, struct dentry *);
  extern void unlock_rename(struct dentry *, struct dentry *);
  
  static inline void nd_set_link(struct nameidata *nd, char *path)
  {
  	nd->saved_names[nd->depth] = path;
  }
  
  static inline char *nd_get_link(struct nameidata *nd)
  {
  	return nd->saved_names[nd->depth];
  }

  static inline void nd_terminate_link(void *name, size_t len, size_t maxlen)
  {
  	((char *) name)[min(len, maxlen)] = '\0';
  }

  #endif /* _LINUX_NAMEI_H */