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/* 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 */
int disk_shift; /* start disk for the original layout */
};
/* 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
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