From 5dc96f8d5de9cc2b93a171c43ff5cb67909b1013 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Wed, 29 Mar 2023 13:55:20 +0800 Subject: [PATCH] btrfs: scrub: remove scrub_parity structure The structure scrub_parity is used to indicate that some extents are scrubbed for the purpose of RAID56 P/Q scrubbing. Since the whole RAID56 P/Q scrubbing path has been replaced with new scrub_stripe infrastructure, and we no longer need to use scrub_parity to modify the behavior of data stripes, we can remove it completely. This removal involves: - scrub_parity_workers Now only one worker would be utilized, scrub_workers, to do the read and repair. All writeback would happen at the main scrub thread. - scrub_block::sparity member - scrub_parity structure - function scrub_parity_get() - function scrub_parity_put() - function scrub_free_parity() - function __scrub_mark_bitmap() - function scrub_parity_mark_sectors_error() - function scrub_parity_mark_sectors_data() These helpers are no longer needed, scrub_stripe has its bitmaps and we can use bitmap helpers to get the error/data status. - scrub_parity_bio_endio() - scrub_parity_check_and_repair() - function scrub_sectors_for_parity() - function scrub_extent_for_parity() - function scrub_raid56_data_stripe_for_parity() - function scrub_raid56_parity() The new code would reuse the scrub read-repair and writeback path. Just skip the dev-replace phase. And scrub_stripe infrastructure allows us to submit and wait for those data stripes before scrubbing P/Q, without extra infrastructure. The following two functions are temporarily exported for later cleanup: - scrub_find_csum() - scrub_add_sector_to_rd_bio() Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/fs.h | 1 - fs/btrfs/scrub.c | 524 +---------------------------------------------- fs/btrfs/scrub.h | 8 +- 3 files changed, 9 insertions(+), 524 deletions(-) diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h index ca17a7fc3ac3..0d98fc5f6f44 100644 --- a/fs/btrfs/fs.h +++ b/fs/btrfs/fs.h @@ -644,7 +644,6 @@ struct btrfs_fs_info { refcount_t scrub_workers_refcnt; struct workqueue_struct *scrub_workers; struct workqueue_struct *scrub_wr_completion_workers; - struct workqueue_struct *scrub_parity_workers; struct btrfs_subpage_info *subpage_info; struct btrfs_discard_ctl discard_ctl; diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index f42b533bc1c0..de6f72f4d723 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -238,7 +238,6 @@ struct scrub_block { atomic_t outstanding_sectors; refcount_t refs; /* free mem on transition to zero */ struct scrub_ctx *sctx; - struct scrub_parity *sparity; struct { unsigned int header_error:1; unsigned int checksum_error:1; @@ -252,37 +251,6 @@ struct scrub_block { struct work_struct work; }; -/* Used for the chunks with parity stripe such RAID5/6 */ -struct scrub_parity { - struct scrub_ctx *sctx; - - struct btrfs_device *scrub_dev; - - u64 logic_start; - - u64 logic_end; - - int nsectors; - - u32 stripe_len; - - refcount_t refs; - - struct list_head sectors_list; - - /* Work of parity check and repair */ - struct work_struct work; - - /* Mark the parity blocks which have data */ - unsigned long dbitmap; - - /* - * Mark the parity blocks which have data, but errors happen when - * read data or check data - */ - unsigned long ebitmap; -}; - struct scrub_ctx { struct scrub_bio *bios[SCRUB_BIOS_PER_SCTX]; struct scrub_stripe stripes[SCRUB_STRIPES_PER_SCTX]; @@ -588,8 +556,6 @@ static int scrub_checksum_super(struct scrub_block *sblock); static void scrub_block_put(struct scrub_block *sblock); static void scrub_sector_get(struct scrub_sector *sector); static void scrub_sector_put(struct scrub_sector *sector); -static void scrub_parity_get(struct scrub_parity *sparity); -static void scrub_parity_put(struct scrub_parity *sparity); static void scrub_bio_end_io(struct bio *bio); static void scrub_bio_end_io_worker(struct work_struct *work); static void scrub_block_complete(struct scrub_block *sblock); @@ -1943,13 +1909,6 @@ static void scrub_write_block_to_dev_replace(struct scrub_block *sblock) struct btrfs_fs_info *fs_info = sblock->sctx->fs_info; int i; - /* - * This block is used for the check of the parity on the source device, - * so the data needn't be written into the destination device. - */ - if (sblock->sparity) - return; - for (i = 0; i < sblock->sector_count; i++) { int ret; @@ -2933,9 +2892,6 @@ static void scrub_block_put(struct scrub_block *sblock) if (refcount_dec_and_test(&sblock->refs)) { int i; - if (sblock->sparity) - scrub_parity_put(sblock->sparity); - for (i = 0; i < sblock->sector_count; i++) scrub_sector_put(sblock->sectors[i]); for (i = 0; i < DIV_ROUND_UP(sblock->len, PAGE_SIZE); i++) { @@ -3038,8 +2994,7 @@ static void scrub_submit(struct scrub_ctx *sctx) submit_bio(sbio->bio); } -static int scrub_add_sector_to_rd_bio(struct scrub_ctx *sctx, - struct scrub_sector *sector) +int scrub_add_sector_to_rd_bio(struct scrub_ctx *sctx, struct scrub_sector *sector) { struct scrub_block *sblock = sector->sblock; struct scrub_bio *sbio; @@ -3159,45 +3114,6 @@ static void scrub_bio_end_io_worker(struct work_struct *work) scrub_pending_bio_dec(sctx); } -static inline void __scrub_mark_bitmap(struct scrub_parity *sparity, - unsigned long *bitmap, - u64 start, u32 len) -{ - u64 offset; - u32 nsectors; - u32 sectorsize_bits = sparity->sctx->fs_info->sectorsize_bits; - - if (len >= sparity->stripe_len) { - bitmap_set(bitmap, 0, sparity->nsectors); - return; - } - - start -= sparity->logic_start; - start = div64_u64_rem(start, sparity->stripe_len, &offset); - offset = offset >> sectorsize_bits; - nsectors = len >> sectorsize_bits; - - if (offset + nsectors <= sparity->nsectors) { - bitmap_set(bitmap, offset, nsectors); - return; - } - - bitmap_set(bitmap, offset, sparity->nsectors - offset); - bitmap_set(bitmap, 0, nsectors - (sparity->nsectors - offset)); -} - -static inline void scrub_parity_mark_sectors_error(struct scrub_parity *sparity, - u64 start, u32 len) -{ - __scrub_mark_bitmap(sparity, &sparity->ebitmap, start, len); -} - -static inline void scrub_parity_mark_sectors_data(struct scrub_parity *sparity, - u64 start, u32 len) -{ - __scrub_mark_bitmap(sparity, &sparity->dbitmap, start, len); -} - static void scrub_block_complete(struct scrub_block *sblock) { int corrupted = 0; @@ -3215,17 +3131,6 @@ static void scrub_block_complete(struct scrub_block *sblock) if (!corrupted && sblock->sctx->is_dev_replace) scrub_write_block_to_dev_replace(sblock); } - - if (sblock->sparity && corrupted && !sblock->data_corrected) { - u64 start = sblock->logical; - u64 end = sblock->logical + - sblock->sectors[sblock->sector_count - 1]->offset + - sblock->sctx->fs_info->sectorsize; - - ASSERT(end - start <= U32_MAX); - scrub_parity_mark_sectors_error(sblock->sparity, - start, end - start); - } } static void drop_csum_range(struct scrub_ctx *sctx, struct btrfs_ordered_sum *sum) @@ -3246,7 +3151,7 @@ static void drop_csum_range(struct scrub_ctx *sctx, struct btrfs_ordered_sum *su * Return 0 if there is no csum for the range. * Return 1 if there is csum for the range and copied to @csum. */ -static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum) +int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum) { bool found = false; @@ -3290,123 +3195,6 @@ static int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum) return 1; } -static int scrub_sectors_for_parity(struct scrub_parity *sparity, - u64 logical, u32 len, - u64 physical, struct btrfs_device *dev, - u64 flags, u64 gen, int mirror_num, u8 *csum) -{ - struct scrub_ctx *sctx = sparity->sctx; - struct scrub_block *sblock; - const u32 sectorsize = sctx->fs_info->sectorsize; - int index; - - ASSERT(IS_ALIGNED(len, sectorsize)); - - sblock = alloc_scrub_block(sctx, dev, logical, physical, physical, mirror_num); - if (!sblock) { - spin_lock(&sctx->stat_lock); - sctx->stat.malloc_errors++; - spin_unlock(&sctx->stat_lock); - return -ENOMEM; - } - - sblock->sparity = sparity; - scrub_parity_get(sparity); - - for (index = 0; len > 0; index++) { - struct scrub_sector *sector; - - sector = alloc_scrub_sector(sblock, logical); - if (!sector) { - spin_lock(&sctx->stat_lock); - sctx->stat.malloc_errors++; - spin_unlock(&sctx->stat_lock); - scrub_block_put(sblock); - return -ENOMEM; - } - sblock->sectors[index] = sector; - /* For scrub parity */ - scrub_sector_get(sector); - list_add_tail(§or->list, &sparity->sectors_list); - sector->flags = flags; - sector->generation = gen; - if (csum) { - sector->have_csum = 1; - memcpy(sector->csum, csum, sctx->fs_info->csum_size); - } else { - sector->have_csum = 0; - } - - /* Iterate over the stripe range in sectorsize steps */ - len -= sectorsize; - logical += sectorsize; - physical += sectorsize; - } - - WARN_ON(sblock->sector_count == 0); - for (index = 0; index < sblock->sector_count; index++) { - struct scrub_sector *sector = sblock->sectors[index]; - int ret; - - ret = scrub_add_sector_to_rd_bio(sctx, sector); - if (ret) { - scrub_block_put(sblock); - return ret; - } - } - - /* Last one frees, either here or in bio completion for last sector */ - scrub_block_put(sblock); - return 0; -} - -static int scrub_extent_for_parity(struct scrub_parity *sparity, - u64 logical, u32 len, - u64 physical, struct btrfs_device *dev, - u64 flags, u64 gen, int mirror_num) -{ - struct scrub_ctx *sctx = sparity->sctx; - int ret; - u8 csum[BTRFS_CSUM_SIZE]; - u32 blocksize; - - if (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state)) { - scrub_parity_mark_sectors_error(sparity, logical, len); - return 0; - } - - if (flags & BTRFS_EXTENT_FLAG_DATA) { - blocksize = sparity->stripe_len; - } else if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) { - blocksize = sparity->stripe_len; - } else { - blocksize = sctx->fs_info->sectorsize; - WARN_ON(1); - } - - while (len) { - u32 l = min(len, blocksize); - int have_csum = 0; - - if (flags & BTRFS_EXTENT_FLAG_DATA) { - /* push csums to sbio */ - have_csum = scrub_find_csum(sctx, logical, csum); - if (have_csum == 0) - goto skip; - } - ret = scrub_sectors_for_parity(sparity, logical, l, physical, dev, - flags, gen, mirror_num, - have_csum ? csum : NULL); - if (ret) - return ret; -skip: - len -= l; - logical += l; - physical += l; - } - return 0; -} - /* * Given a physical address, this will calculate it's * logical offset. if this is a parity stripe, it will return @@ -3452,119 +3240,6 @@ static int get_raid56_logic_offset(u64 physical, int num, return 1; } -static void scrub_free_parity(struct scrub_parity *sparity) -{ - struct scrub_ctx *sctx = sparity->sctx; - struct scrub_sector *curr, *next; - int nbits; - - nbits = bitmap_weight(&sparity->ebitmap, sparity->nsectors); - if (nbits) { - spin_lock(&sctx->stat_lock); - sctx->stat.read_errors += nbits; - sctx->stat.uncorrectable_errors += nbits; - spin_unlock(&sctx->stat_lock); - } - - list_for_each_entry_safe(curr, next, &sparity->sectors_list, list) { - list_del_init(&curr->list); - scrub_sector_put(curr); - } - - kfree(sparity); -} - -static void scrub_parity_bio_endio_worker(struct work_struct *work) -{ - struct scrub_parity *sparity = container_of(work, struct scrub_parity, - work); - struct scrub_ctx *sctx = sparity->sctx; - - btrfs_bio_counter_dec(sctx->fs_info); - scrub_free_parity(sparity); - scrub_pending_bio_dec(sctx); -} - -static void scrub_parity_bio_endio(struct bio *bio) -{ - struct scrub_parity *sparity = bio->bi_private; - struct btrfs_fs_info *fs_info = sparity->sctx->fs_info; - - if (bio->bi_status) - bitmap_or(&sparity->ebitmap, &sparity->ebitmap, - &sparity->dbitmap, sparity->nsectors); - - bio_put(bio); - - INIT_WORK(&sparity->work, scrub_parity_bio_endio_worker); - queue_work(fs_info->scrub_parity_workers, &sparity->work); -} - -static void scrub_parity_check_and_repair(struct scrub_parity *sparity) -{ - struct scrub_ctx *sctx = sparity->sctx; - struct btrfs_fs_info *fs_info = sctx->fs_info; - struct bio *bio; - struct btrfs_raid_bio *rbio; - struct btrfs_io_context *bioc = NULL; - u64 length; - int ret; - - if (!bitmap_andnot(&sparity->dbitmap, &sparity->dbitmap, - &sparity->ebitmap, sparity->nsectors)) - goto out; - - length = sparity->logic_end - sparity->logic_start; - - btrfs_bio_counter_inc_blocked(fs_info); - ret = btrfs_map_sblock(fs_info, BTRFS_MAP_WRITE, sparity->logic_start, - &length, &bioc); - if (ret || !bioc) - goto bioc_out; - - bio = bio_alloc(NULL, BIO_MAX_VECS, REQ_OP_READ, GFP_NOFS); - bio->bi_iter.bi_sector = sparity->logic_start >> 9; - bio->bi_private = sparity; - bio->bi_end_io = scrub_parity_bio_endio; - - rbio = raid56_parity_alloc_scrub_rbio(bio, bioc, - sparity->scrub_dev, - &sparity->dbitmap, - sparity->nsectors); - btrfs_put_bioc(bioc); - if (!rbio) - goto rbio_out; - - scrub_pending_bio_inc(sctx); - raid56_parity_submit_scrub_rbio(rbio); - return; - -rbio_out: - bio_put(bio); -bioc_out: - btrfs_bio_counter_dec(fs_info); - bitmap_or(&sparity->ebitmap, &sparity->ebitmap, &sparity->dbitmap, - sparity->nsectors); - spin_lock(&sctx->stat_lock); - sctx->stat.malloc_errors++; - spin_unlock(&sctx->stat_lock); -out: - scrub_free_parity(sparity); -} - -static void scrub_parity_get(struct scrub_parity *sparity) -{ - refcount_inc(&sparity->refs); -} - -static void scrub_parity_put(struct scrub_parity *sparity) -{ - if (!refcount_dec_and_test(&sparity->refs)) - return; - - scrub_parity_check_and_repair(sparity); -} - /* * Return 0 if the extent item range covers any byte of the range. * Return <0 if the extent item is before @search_start. @@ -3691,184 +3366,6 @@ static void get_extent_info(struct btrfs_path *path, u64 *extent_start_ret, *generation_ret = btrfs_extent_generation(path->nodes[0], ei); } -static bool does_range_cross_boundary(u64 extent_start, u64 extent_len, - u64 boundary_start, u64 boudary_len) -{ - return (extent_start < boundary_start && - extent_start + extent_len > boundary_start) || - (extent_start < boundary_start + boudary_len && - extent_start + extent_len > boundary_start + boudary_len); -} - -static int scrub_raid56_data_stripe_for_parity(struct scrub_ctx *sctx, - struct scrub_parity *sparity, - struct map_lookup *map, - struct btrfs_device *sdev, - struct btrfs_path *path, - u64 logical) -{ - struct btrfs_fs_info *fs_info = sctx->fs_info; - struct btrfs_root *extent_root = btrfs_extent_root(fs_info, logical); - struct btrfs_root *csum_root = btrfs_csum_root(fs_info, logical); - u64 cur_logical = logical; - int ret; - - ASSERT(map->type & BTRFS_BLOCK_GROUP_RAID56_MASK); - - /* Path must not be populated */ - ASSERT(!path->nodes[0]); - - while (cur_logical < logical + BTRFS_STRIPE_LEN) { - struct btrfs_io_context *bioc = NULL; - struct btrfs_device *extent_dev; - u64 extent_start; - u64 extent_size; - u64 mapped_length; - u64 extent_flags; - u64 extent_gen; - u64 extent_physical; - u64 extent_mirror_num; - - ret = find_first_extent_item(extent_root, path, cur_logical, - logical + BTRFS_STRIPE_LEN - cur_logical); - /* No more extent item in this data stripe */ - if (ret > 0) { - ret = 0; - break; - } - if (ret < 0) - break; - get_extent_info(path, &extent_start, &extent_size, &extent_flags, - &extent_gen); - - /* Metadata should not cross stripe boundaries */ - if ((extent_flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) && - does_range_cross_boundary(extent_start, extent_size, - logical, BTRFS_STRIPE_LEN)) { - btrfs_err(fs_info, - "scrub: tree block %llu spanning stripes, ignored. logical=%llu", - extent_start, logical); - spin_lock(&sctx->stat_lock); - sctx->stat.uncorrectable_errors++; - spin_unlock(&sctx->stat_lock); - cur_logical += extent_size; - continue; - } - - /* Skip hole range which doesn't have any extent */ - cur_logical = max(extent_start, cur_logical); - - /* Truncate the range inside this data stripe */ - extent_size = min(extent_start + extent_size, - logical + BTRFS_STRIPE_LEN) - cur_logical; - extent_start = cur_logical; - ASSERT(extent_size <= U32_MAX); - - scrub_parity_mark_sectors_data(sparity, extent_start, extent_size); - - mapped_length = extent_size; - ret = btrfs_map_block(fs_info, BTRFS_MAP_READ, extent_start, - &mapped_length, &bioc, 0); - if (!ret && (!bioc || mapped_length < extent_size)) - ret = -EIO; - if (ret) { - btrfs_put_bioc(bioc); - scrub_parity_mark_sectors_error(sparity, extent_start, - extent_size); - break; - } - extent_physical = bioc->stripes[0].physical; - extent_mirror_num = bioc->mirror_num; - extent_dev = bioc->stripes[0].dev; - btrfs_put_bioc(bioc); - - ret = btrfs_lookup_csums_list(csum_root, extent_start, - extent_start + extent_size - 1, - &sctx->csum_list, 1, false); - if (ret) { - scrub_parity_mark_sectors_error(sparity, extent_start, - extent_size); - break; - } - - ret = scrub_extent_for_parity(sparity, extent_start, - extent_size, extent_physical, - extent_dev, extent_flags, - extent_gen, extent_mirror_num); - scrub_free_csums(sctx); - - if (ret) { - scrub_parity_mark_sectors_error(sparity, extent_start, - extent_size); - break; - } - - cond_resched(); - cur_logical += extent_size; - } - btrfs_release_path(path); - return ret; -} - -int scrub_raid56_parity(struct scrub_ctx *sctx, struct map_lookup *map, - struct btrfs_device *sdev, u64 logic_start, u64 logic_end) -{ - struct btrfs_fs_info *fs_info = sctx->fs_info; - struct btrfs_path *path; - u64 cur_logical; - int ret; - struct scrub_parity *sparity; - int nsectors; - - path = btrfs_alloc_path(); - if (!path) { - spin_lock(&sctx->stat_lock); - sctx->stat.malloc_errors++; - spin_unlock(&sctx->stat_lock); - return -ENOMEM; - } - path->search_commit_root = 1; - path->skip_locking = 1; - - nsectors = BTRFS_STRIPE_LEN >> fs_info->sectorsize_bits; - ASSERT(nsectors <= BITS_PER_LONG); - sparity = kzalloc(sizeof(struct scrub_parity), GFP_NOFS); - if (!sparity) { - spin_lock(&sctx->stat_lock); - sctx->stat.malloc_errors++; - spin_unlock(&sctx->stat_lock); - btrfs_free_path(path); - return -ENOMEM; - } - - sparity->stripe_len = BTRFS_STRIPE_LEN; - sparity->nsectors = nsectors; - sparity->sctx = sctx; - sparity->scrub_dev = sdev; - sparity->logic_start = logic_start; - sparity->logic_end = logic_end; - refcount_set(&sparity->refs, 1); - INIT_LIST_HEAD(&sparity->sectors_list); - - ret = 0; - for (cur_logical = logic_start; cur_logical < logic_end; - cur_logical += BTRFS_STRIPE_LEN) { - ret = scrub_raid56_data_stripe_for_parity(sctx, sparity, map, - sdev, path, cur_logical); - if (ret < 0) - break; - } - - scrub_parity_put(sparity); - scrub_submit(sctx); - mutex_lock(&sctx->wr_lock); - scrub_wr_submit(sctx); - mutex_unlock(&sctx->wr_lock); - - btrfs_free_path(path); - return ret < 0 ? ret : 0; -} - static int sync_write_pointer_for_zoned(struct scrub_ctx *sctx, u64 logical, u64 physical, u64 physical_end) { @@ -5166,20 +4663,15 @@ static void scrub_workers_put(struct btrfs_fs_info *fs_info) struct workqueue_struct *scrub_workers = fs_info->scrub_workers; struct workqueue_struct *scrub_wr_comp = fs_info->scrub_wr_completion_workers; - struct workqueue_struct *scrub_parity = - fs_info->scrub_parity_workers; fs_info->scrub_workers = NULL; fs_info->scrub_wr_completion_workers = NULL; - fs_info->scrub_parity_workers = NULL; mutex_unlock(&fs_info->scrub_lock); if (scrub_workers) destroy_workqueue(scrub_workers); if (scrub_wr_comp) destroy_workqueue(scrub_wr_comp); - if (scrub_parity) - destroy_workqueue(scrub_parity); } } @@ -5191,7 +4683,6 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info, { struct workqueue_struct *scrub_workers = NULL; struct workqueue_struct *scrub_wr_comp = NULL; - struct workqueue_struct *scrub_parity = NULL; unsigned int flags = WQ_FREEZABLE | WQ_UNBOUND; int max_active = fs_info->thread_pool_size; int ret = -ENOMEM; @@ -5208,18 +4699,12 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info, if (!scrub_wr_comp) goto fail_scrub_wr_completion_workers; - scrub_parity = alloc_workqueue("btrfs-scrubparity", flags, max_active); - if (!scrub_parity) - goto fail_scrub_parity_workers; - mutex_lock(&fs_info->scrub_lock); if (refcount_read(&fs_info->scrub_workers_refcnt) == 0) { ASSERT(fs_info->scrub_workers == NULL && - fs_info->scrub_wr_completion_workers == NULL && - fs_info->scrub_parity_workers == NULL); + fs_info->scrub_wr_completion_workers == NULL); fs_info->scrub_workers = scrub_workers; fs_info->scrub_wr_completion_workers = scrub_wr_comp; - fs_info->scrub_parity_workers = scrub_parity; refcount_set(&fs_info->scrub_workers_refcnt, 1); mutex_unlock(&fs_info->scrub_lock); return 0; @@ -5229,8 +4714,7 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info, mutex_unlock(&fs_info->scrub_lock); ret = 0; - destroy_workqueue(scrub_parity); -fail_scrub_parity_workers: + destroy_workqueue(scrub_wr_comp); fail_scrub_wr_completion_workers: destroy_workqueue(scrub_workers); diff --git a/fs/btrfs/scrub.h b/fs/btrfs/scrub.h index 6c17668dfad9..d23068e741fb 100644 --- a/fs/btrfs/scrub.h +++ b/fs/btrfs/scrub.h @@ -14,8 +14,10 @@ int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, struct btrfs_scrub_progress *progress); /* Temporary declaration, would be deleted later. */ -int scrub_raid56_parity(struct scrub_ctx *sctx, struct map_lookup *map, - struct btrfs_device *sdev, u64 logic_start, - u64 logic_end); +struct scrub_ctx; +struct scrub_sector; +int scrub_find_csum(struct scrub_ctx *sctx, u64 logical, u8 *csum); +int scrub_add_sector_to_rd_bio(struct scrub_ctx *sctx, + struct scrub_sector *sector); #endif