linux/fs/btrfs/bio.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2007 Oracle.  All rights reserved.
 * Copyright (C) 2022 Christoph Hellwig.
 */

#ifndef BTRFS_BIO_H
#define BTRFS_BIO_H

#include <linux/types.h>
#include <linux/bio.h>
#include <linux/workqueue.h>
#include "tree-checker.h"

struct btrfs_bio;
struct btrfs_fs_info;
struct btrfs_inode;

#define BTRFS_BIO_INLINE_CSUM_SIZE …

/*
 * Maximum number of sectors for a single bio to limit the size of the
 * checksum array.  This matches the number of bio_vecs per bio and thus the
 * I/O size for buffered I/O.
 */
#define BTRFS_MAX_BIO_SECTORS …

btrfs_bio_end_io_t;

/*
 * Highlevel btrfs I/O structure.  It is allocated by btrfs_bio_alloc and
 * passed to btrfs_submit_bio for mapping to the physical devices.
 */
struct btrfs_bio { … };

static inline struct btrfs_bio *btrfs_bio(struct bio *bio)
{ … }

int __init btrfs_bioset_init(void);
void __cold btrfs_bioset_exit(void);

void btrfs_bio_init(struct btrfs_bio *bbio, struct btrfs_fs_info *fs_info,
		    btrfs_bio_end_io_t end_io, void *private);
struct btrfs_bio *btrfs_bio_alloc(unsigned int nr_vecs, blk_opf_t opf,
				  struct btrfs_fs_info *fs_info,
				  btrfs_bio_end_io_t end_io, void *private);
void btrfs_bio_end_io(struct btrfs_bio *bbio, blk_status_t status);

/* Submit using blkcg_punt_bio_submit. */
#define REQ_BTRFS_CGROUP_PUNT …

void btrfs_submit_bio(struct btrfs_bio *bbio, int mirror_num);
void btrfs_submit_repair_write(struct btrfs_bio *bbio, int mirror_num, bool dev_replace);
int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
			    u64 length, u64 logical, struct folio *folio,
			    unsigned int folio_offset, int mirror_num);

#endif