| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _RAID0_H |
| 3 | #define _RAID0_H |
| 4 | |
| 5 | struct 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 | |
| 20 | enum r0layout { |
| 21 | RAID0_ORIG_LAYOUT = 1, |
| 22 | RAID0_ALT_MULTIZONE_LAYOUT = 2, |
| 23 | }; |
| 24 | struct 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 |