#ifndef _MULTIPATH_H
  #define _MULTIPATH_H

  struct multipath_info {

  	struct md_rdev	*rdev;

  };

  struct mpconf {

  	struct mddev			*mddev;

  	struct multipath_info	*multipaths;
  	int			raid_disks;

  	spinlock_t		device_lock;
  	struct list_head	retry_list;
  
  	mempool_t		*pool;
  };

  /*

   * this is our 'private' 'collective' MULTIPATH buffer head.
   * it contains information about what kind of IO operations were started
   * for this MULTIPATH operation, and about their status:
   */
  
  struct multipath_bh {

  	struct mddev			*mddev;

  	struct bio		*master_bio;
  	struct bio		bio;
  	int			path;
  	struct list_head	retry_list;
  };
  #endif