projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 53b381b3 DW |
1 | /* |
| 2 | * Copyright (C) 2012 Fusion-io All rights reserved. | |
| 3 | * Copyright (C) 2012 Intel Corp. All rights reserved. | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public | |
| 7 | * License v2 as published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | * General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public | |
| 15 | * License along with this program; if not, write to the | |
| 16 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 17 | * Boston, MA 021110-1307, USA. | |
| 18 | */ | |
| 19 | ||
| 20 | #ifndef __BTRFS_RAID56__ | |
| 21 | #define __BTRFS_RAID56__ | |
| 22 | static inline int nr_parity_stripes(struct map_lookup *map) | |
| 23 | { | |
| 24 | if (map->type & BTRFS_BLOCK_GROUP_RAID5) | |
| 25 | return 1; | |
| 26 | else if (map->type & BTRFS_BLOCK_GROUP_RAID6) | |
| 27 | return 2; | |
| 28 | else | |
| 29 | return 0; | |
| 30 | } | |
| 31 | ||
| 32 | static inline int nr_data_stripes(struct map_lookup *map) | |
| 33 | { | |
| 34 | return map->num_stripes - nr_parity_stripes(map); | |
| 35 | } | |
| 36 | #define RAID5_P_STRIPE ((u64)-2) | |
| 37 | #define RAID6_Q_STRIPE ((u64)-1) | |
| 38 | ||
| 39 | #define is_parity_stripe(x) (((x) == RAID5_P_STRIPE) || \ | |
| 40 | ((x) == RAID6_Q_STRIPE)) | |
| 41 | ||
| 5a6ac9ea MX |
42 | struct btrfs_raid_bio; |
| 43 | struct btrfs_device; | |
| 44 | ||
| 53b381b3 | 45 | int raid56_parity_recover(struct btrfs_root *root, struct bio *bio, |
| 8e5cfb55 ZL |
46 | struct btrfs_bio *bbio, u64 stripe_len, |
| 47 | int mirror_num, int generic_io); | |
| 53b381b3 | 48 | int raid56_parity_write(struct btrfs_root *root, struct bio *bio, |
| 8e5cfb55 | 49 | struct btrfs_bio *bbio, u64 stripe_len); |
| 53b381b3 | 50 | |
| 5a6ac9ea MX |
51 | struct btrfs_raid_bio * |
| 52 | raid56_parity_alloc_scrub_rbio(struct btrfs_root *root, struct bio *bio, | |
| 8e5cfb55 ZL |
53 | struct btrfs_bio *bbio, u64 stripe_len, |
| 54 | struct btrfs_device *scrub_dev, | |
| 5a6ac9ea MX |
55 | unsigned long *dbitmap, int stripe_nsectors); |
| 56 | void raid56_parity_add_scrub_pages(struct btrfs_raid_bio *rbio, | |
| 57 | struct page *page, u64 logical); | |
| 58 | void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio); | |
| 59 | ||
| 53b381b3 DW |
60 | int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info); |
| 61 | void btrfs_free_stripe_hash_table(struct btrfs_fs_info *info); | |
| 62 | #endif |