Commit | Line | Data |
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9888c340 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
53b381b3 DW |
2 | /* |
3 | * Copyright (C) 2012 Fusion-io All rights reserved. | |
4 | * Copyright (C) 2012 Intel Corp. All rights reserved. | |
53b381b3 DW |
5 | */ |
6 | ||
9888c340 DS |
7 | #ifndef BTRFS_RAID56_H |
8 | #define BTRFS_RAID56_H | |
9 | ||
72ad8131 | 10 | static inline int nr_parity_stripes(const struct map_lookup *map) |
53b381b3 DW |
11 | { |
12 | if (map->type & BTRFS_BLOCK_GROUP_RAID5) | |
13 | return 1; | |
14 | else if (map->type & BTRFS_BLOCK_GROUP_RAID6) | |
15 | return 2; | |
16 | else | |
17 | return 0; | |
18 | } | |
19 | ||
72ad8131 | 20 | static inline int nr_data_stripes(const struct map_lookup *map) |
53b381b3 DW |
21 | { |
22 | return map->num_stripes - nr_parity_stripes(map); | |
23 | } | |
24 | #define RAID5_P_STRIPE ((u64)-2) | |
25 | #define RAID6_Q_STRIPE ((u64)-1) | |
26 | ||
27 | #define is_parity_stripe(x) (((x) == RAID5_P_STRIPE) || \ | |
28 | ((x) == RAID6_Q_STRIPE)) | |
29 | ||
5a6ac9ea MX |
30 | struct btrfs_raid_bio; |
31 | struct btrfs_device; | |
32 | ||
6a258d72 | 33 | int raid56_parity_recover(struct bio *bio, struct btrfs_io_context *bioc, |
cc353a8b QW |
34 | u32 stripe_len, int mirror_num, int generic_io); |
35 | int raid56_parity_write(struct bio *bio, struct btrfs_io_context *bioc, u32 stripe_len); | |
53b381b3 | 36 | |
b4ee1782 OS |
37 | void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page, |
38 | u64 logical); | |
39 | ||
6a258d72 | 40 | struct btrfs_raid_bio *raid56_parity_alloc_scrub_rbio(struct bio *bio, |
cc353a8b | 41 | struct btrfs_io_context *bioc, u32 stripe_len, |
6a258d72 QW |
42 | struct btrfs_device *scrub_dev, |
43 | unsigned long *dbitmap, int stripe_nsectors); | |
5a6ac9ea MX |
44 | void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio); |
45 | ||
b4ee1782 | 46 | struct btrfs_raid_bio * |
6a258d72 QW |
47 | raid56_alloc_missing_rbio(struct bio *bio, struct btrfs_io_context *bioc, |
48 | u64 length); | |
b4ee1782 OS |
49 | void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio); |
50 | ||
53b381b3 DW |
51 | int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info); |
52 | void btrfs_free_stripe_hash_table(struct btrfs_fs_info *info); | |
9888c340 | 53 | |
53b381b3 | 54 | #endif |