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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef _RAID0_H |
3 | #define _RAID0_H | |
4 | ||
e373ab10 | 5 | struct strip_zone { |
dc582663 | 6 | sector_t zone_end; /* Start of the next zone (in sectors) */ |
019c4e2f | 7 | sector_t dev_start; /* Zone offset in real dev (in sectors) */ |
ba13da47 | 8 | int nb_dev; /* # of devices attached to the zone */ |
1da177e4 LT |
9 | }; |
10 | ||
c84a1372 N |
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 | }; | |
e373ab10 | 24 | struct r0conf { |
ba13da47 N |
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; | |
c84a1372 | 29 | enum r0layout layout; |
1da177e4 LT |
30 | }; |
31 | ||
1da177e4 | 32 | #endif |