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67d6698250
Now that btrfs_submit_bio splits the bio when crossing stripe boundaries, there is no need for the higher level code to do that manually. For direct I/O this is really helpful, as btrfs_submit_io can now simply take the bio allocated by iomap and send it on to btrfs_submit_bio instead of allocating clones. For that to work, the bio embedded into struct btrfs_dio_private needs to become a full btrfs_bio as expected by btrfs_submit_bio. With this change there is a single work item to offload the entire iomap bio so the heuristics to skip async processing for bios that were split isn't needed anymore either. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David Sterba <dsterba@suse.com>
98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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* Copyright (C) 2022 Christoph Hellwig.
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*/
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#ifndef BTRFS_BIO_H
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#define BTRFS_BIO_H
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#include <linux/bio.h>
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#include <linux/workqueue.h>
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#include "tree-checker.h"
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struct btrfs_bio;
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struct btrfs_fs_info;
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#define BTRFS_BIO_INLINE_CSUM_SIZE 64
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/*
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* Maximum number of sectors for a single bio to limit the size of the
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* checksum array. This matches the number of bio_vecs per bio and thus the
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* I/O size for buffered I/O.
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*/
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#define BTRFS_MAX_BIO_SECTORS (256)
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typedef void (*btrfs_bio_end_io_t)(struct btrfs_bio *bbio);
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/*
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* Highlevel btrfs I/O structure. It is allocated by btrfs_bio_alloc and
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* passed to btrfs_submit_bio for mapping to the physical devices.
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*/
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struct btrfs_bio {
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/* Inode and offset into it that this I/O operates on. */
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struct btrfs_inode *inode;
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u64 file_offset;
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union {
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/*
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* Data checksumming and original I/O information for internal
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* use in the btrfs_submit_bio machinery.
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*/
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struct {
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u8 *csum;
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u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
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struct bvec_iter saved_iter;
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};
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/* For metadata parentness verification. */
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struct btrfs_tree_parent_check parent_check;
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};
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/* End I/O information supplied to btrfs_bio_alloc */
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btrfs_bio_end_io_t end_io;
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void *private;
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/* For internal use in read end I/O handling */
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unsigned int mirror_num;
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atomic_t pending_ios;
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struct work_struct end_io_work;
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/*
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* This member must come last, bio_alloc_bioset will allocate enough
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* bytes for entire btrfs_bio but relies on bio being last.
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*/
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struct bio bio;
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};
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static inline struct btrfs_bio *btrfs_bio(struct bio *bio)
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{
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return container_of(bio, struct btrfs_bio, bio);
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}
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int __init btrfs_bioset_init(void);
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void __cold btrfs_bioset_exit(void);
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void btrfs_bio_init(struct btrfs_bio *bbio, struct btrfs_inode *inode,
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btrfs_bio_end_io_t end_io, void *private);
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struct bio *btrfs_bio_alloc(unsigned int nr_vecs, blk_opf_t opf,
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struct btrfs_inode *inode,
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btrfs_bio_end_io_t end_io, void *private);
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static inline void btrfs_bio_end_io(struct btrfs_bio *bbio, blk_status_t status)
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{
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bbio->bio.bi_status = status;
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bbio->end_io(bbio);
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}
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/* Bio only refers to one ordered extent. */
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#define REQ_BTRFS_ONE_ORDERED REQ_DRV
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void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
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int mirror_num);
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int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
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u64 length, u64 logical, struct page *page,
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unsigned int pg_offset, int mirror_num);
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#endif
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