From 2380220e1e13b2dec4ae6f561841763ed6e1b0c0 Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Sat, 21 Jan 2023 07:50:22 +0100 Subject: btrfs: remove stripe boundary calculation for buffered I/O Remove btrfs_bio_ctrl::len_to_stripe_boundary, so that buffer I/O will no longer limit its bio size according to stripe length now that btrfs_submit_bio can split bios at stripe boundaries. Reviewed-by: Josef Bacik Reviewed-by: Johannes Thumshirn Signed-off-by: Qu Wenruo [hch: simplify calc_bio_boundaries a little more] Signed-off-by: Christoph Hellwig Signed-off-by: David Sterba --- fs/btrfs/extent_io.c | 71 ++++++++++++++-------------------------------------- 1 file changed, 19 insertions(+), 52 deletions(-) (limited to 'fs/btrfs') diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 2983fe2e10fe..03dac03a3083 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -99,7 +99,6 @@ struct btrfs_bio_ctrl { struct bio *bio; int mirror_num; enum btrfs_compression_type compress_type; - u32 len_to_stripe_boundary; u32 len_to_oe_boundary; btrfs_bio_end_io_t end_io_func; @@ -900,7 +899,7 @@ static int btrfs_bio_add_page(struct btrfs_bio_ctrl *bio_ctrl, ASSERT(bio); /* The limit should be calculated when bio_ctrl->bio is allocated */ - ASSERT(bio_ctrl->len_to_oe_boundary && bio_ctrl->len_to_stripe_boundary); + ASSERT(bio_ctrl->len_to_oe_boundary); if (bio_ctrl->compress_type != compress_type) return 0; @@ -936,9 +935,7 @@ static int btrfs_bio_add_page(struct btrfs_bio_ctrl *bio_ctrl, if (!contig) return 0; - real_size = min(bio_ctrl->len_to_oe_boundary, - bio_ctrl->len_to_stripe_boundary) - bio_size; - real_size = min(real_size, size); + real_size = min(bio_ctrl->len_to_oe_boundary - bio_size, size); /* * If real_size is 0, never call bio_add_*_page(), as even size is 0, @@ -955,58 +952,30 @@ static int btrfs_bio_add_page(struct btrfs_bio_ctrl *bio_ctrl, return ret; } -static int calc_bio_boundaries(struct btrfs_bio_ctrl *bio_ctrl, - struct btrfs_inode *inode, u64 file_offset) +static void calc_bio_boundaries(struct btrfs_bio_ctrl *bio_ctrl, + struct btrfs_inode *inode, u64 file_offset) { - struct btrfs_fs_info *fs_info = inode->root->fs_info; - struct btrfs_io_geometry geom; struct btrfs_ordered_extent *ordered; - struct extent_map *em; u64 logical = (bio_ctrl->bio->bi_iter.bi_sector << SECTOR_SHIFT); - int ret; /* - * Pages for compressed extent are never submitted to disk directly, - * thus it has no real boundary, just set them to U32_MAX. - * - * The split happens for real compressed bio, which happens in - * btrfs_submit_compressed_read/write(). + * Limit the extent to the ordered boundary for Zone Append. + * Compressed bios aren't submitted directly, so it doesn't apply to + * them. */ - if (bio_ctrl->compress_type != BTRFS_COMPRESS_NONE) { - bio_ctrl->len_to_oe_boundary = U32_MAX; - bio_ctrl->len_to_stripe_boundary = U32_MAX; - return 0; - } - em = btrfs_get_chunk_map(fs_info, logical, fs_info->sectorsize); - if (IS_ERR(em)) - return PTR_ERR(em); - ret = btrfs_get_io_geometry(fs_info, em, btrfs_op(bio_ctrl->bio), - logical, &geom); - free_extent_map(em); - if (ret < 0) { - return ret; - } - if (geom.len > U32_MAX) - bio_ctrl->len_to_stripe_boundary = U32_MAX; - else - bio_ctrl->len_to_stripe_boundary = (u32)geom.len; - - if (bio_op(bio_ctrl->bio) != REQ_OP_ZONE_APPEND) { - bio_ctrl->len_to_oe_boundary = U32_MAX; - return 0; - } - - /* Ordered extent not yet created, so we're good */ - ordered = btrfs_lookup_ordered_extent(inode, file_offset); - if (!ordered) { - bio_ctrl->len_to_oe_boundary = U32_MAX; - return 0; + if (bio_ctrl->compress_type == BTRFS_COMPRESS_NONE && + bio_op(bio_ctrl->bio) == REQ_OP_ZONE_APPEND) { + ordered = btrfs_lookup_ordered_extent(inode, file_offset); + if (ordered) { + bio_ctrl->len_to_oe_boundary = min_t(u32, U32_MAX, + ordered->disk_bytenr + + ordered->disk_num_bytes - logical); + btrfs_put_ordered_extent(ordered); + return; + } } - bio_ctrl->len_to_oe_boundary = min_t(u32, U32_MAX, - ordered->disk_bytenr + ordered->disk_num_bytes - logical); - btrfs_put_ordered_extent(ordered); - return 0; + bio_ctrl->len_to_oe_boundary = U32_MAX; } static int alloc_new_bio(struct btrfs_inode *inode, @@ -1032,9 +1001,7 @@ static int alloc_new_bio(struct btrfs_inode *inode, bio->bi_iter.bi_sector = (disk_bytenr + offset) >> SECTOR_SHIFT; bio_ctrl->bio = bio; bio_ctrl->compress_type = compress_type; - ret = calc_bio_boundaries(bio_ctrl, inode, file_offset); - if (ret < 0) - goto error; + calc_bio_boundaries(bio_ctrl, inode, file_offset); if (wbc) { /* -- cgit v1.2.1