1#ifndef _RAID0_H
 2#define _RAID0_H
 3
 4struct strip_zone {
 5	sector_t zone_end;	/* Start of the next zone (in sectors) */
 6	sector_t dev_start;	/* Zone offset in real dev (in sectors) */
 7	int	 nb_dev;	/* # of devices attached to the zone */
 8};
 9
 
 
 
 
 
 
 
 
 
 
 
 
 
10struct r0conf {
11	struct strip_zone	*strip_zone;
12	struct md_rdev		**devlist; /* lists of rdevs, pointed to
13					    * by strip_zone->dev */
14	int			nr_strip_zones;
15	int			has_merge_bvec;	/* at least one member has
16						 * a merge_bvec_fn */
17};
18
19#endif

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _RAID0_H
 3#define _RAID0_H
 4
 5struct strip_zone {
 6	sector_t zone_end;	/* Start of the next zone (in sectors) */
 7	sector_t dev_start;	/* Zone offset in real dev (in sectors) */
 8	int	 nb_dev;	/* # of devices attached to the zone */
 9};
10
11/* Linux 3.14 (20d0189b101) made an unintended change to
12 * the RAID0 layout for multi-zone arrays (where devices aren't all
13 * the same size.
14 * RAID0_ORIG_LAYOUT restores the original layout
15 * RAID0_ALT_MULTIZONE_LAYOUT uses the altered layout
16 * The layouts are identical when there is only one zone (all
17 * devices the same size).
18 */
19
20enum r0layout {
21	RAID0_ORIG_LAYOUT = 1,
22	RAID0_ALT_MULTIZONE_LAYOUT = 2,
23};
24struct r0conf {
25	struct strip_zone	*strip_zone;
26	struct md_rdev		**devlist; /* lists of rdevs, pointed to
27					    * by strip_zone->dev */
28	int			nr_strip_zones;
29	enum r0layout		layout;
 
30};
31
32#endif