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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /fs/btrfs/raid56.h | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/btrfs/raid56.h')
| -rw-r--r-- | fs/btrfs/raid56.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/fs/btrfs/raid56.h b/fs/btrfs/raid56.h new file mode 100644 index 000000000..f5d4c13a8 --- /dev/null +++ b/fs/btrfs/raid56.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2012 Fusion-io All rights reserved. + * Copyright (C) 2012 Intel Corp. All rights reserved. + */ + +#ifndef BTRFS_RAID56_H +#define BTRFS_RAID56_H + +static inline int nr_parity_stripes(struct map_lookup *map) +{ + if (map->type & BTRFS_BLOCK_GROUP_RAID5) + return 1; + else if (map->type & BTRFS_BLOCK_GROUP_RAID6) + return 2; + else + return 0; +} + +static inline int nr_data_stripes(struct map_lookup *map) +{ + return map->num_stripes - nr_parity_stripes(map); +} +#define RAID5_P_STRIPE ((u64)-2) +#define RAID6_Q_STRIPE ((u64)-1) + +#define is_parity_stripe(x) (((x) == RAID5_P_STRIPE) || \ + ((x) == RAID6_Q_STRIPE)) + +struct btrfs_raid_bio; +struct btrfs_device; + +int raid56_parity_recover(struct btrfs_fs_info *fs_info, struct bio *bio, + struct btrfs_bio *bbio, u64 stripe_len, + int mirror_num, int generic_io); +int raid56_parity_write(struct btrfs_fs_info *fs_info, struct bio *bio, + struct btrfs_bio *bbio, u64 stripe_len); + +void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page, + u64 logical); + +struct btrfs_raid_bio * +raid56_parity_alloc_scrub_rbio(struct btrfs_fs_info *fs_info, struct bio *bio, + struct btrfs_bio *bbio, u64 stripe_len, + struct btrfs_device *scrub_dev, + unsigned long *dbitmap, int stripe_nsectors); +void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio); + +struct btrfs_raid_bio * +raid56_alloc_missing_rbio(struct btrfs_fs_info *fs_info, struct bio *bio, + struct btrfs_bio *bbio, u64 length); +void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio); + +int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info); +void btrfs_free_stripe_hash_table(struct btrfs_fs_info *info); + +#endif |