/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef _RAID0_H
  #define _RAID0_H

  struct strip_zone {

  	sector_t zone_end;	/* Start of the next zone (in sectors) */

  	sector_t dev_start;	/* Zone offset in real dev (in sectors) */

  	int	 nb_dev;	/* # of devices attached to the zone */

  };

  /* Linux 3.14 (20d0189b101) made an unintended change to
   * the RAID0 layout for multi-zone arrays (where devices aren't all
   * the same size.
   * RAID0_ORIG_LAYOUT restores the original layout
   * RAID0_ALT_MULTIZONE_LAYOUT uses the altered layout
   * The layouts are identical when there is only one zone (all
   * devices the same size).
   */
  
  enum r0layout {
  	RAID0_ORIG_LAYOUT = 1,
  	RAID0_ALT_MULTIZONE_LAYOUT = 2,
  };

  struct r0conf {

  	struct strip_zone	*strip_zone;
  	struct md_rdev		**devlist; /* lists of rdevs, pointed to
  					    * by strip_zone->dev */
  	int			nr_strip_zones;

  	enum r0layout		layout;

  };

  #endif