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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.4 *5 * This file is released under the GPL.6 */7 8#ifndef DM_BIO_RECORD_H9#define DM_BIO_RECORD_H10 11#include <linux/bio.h>12#include <linux/blk-integrity.h>13 14/*15 * There are lots of mutable fields in the bio struct that get16 * changed by the lower levels of the block layer. Some targets,17 * such as multipath, may wish to resubmit a bio on error. The18 * functions in this file help the target record and restore the19 * original bio state.20 */21 22struct dm_bio_details {23 struct block_device *bi_bdev;24 int __bi_remaining;25 unsigned long bi_flags;26 struct bvec_iter bi_iter;27 bio_end_io_t *bi_end_io;28#if defined(CONFIG_BLK_DEV_INTEGRITY)29 struct bio_integrity_payload *bi_integrity;30#endif31};32 33static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)34{35 bd->bi_bdev = bio->bi_bdev;36 bd->bi_flags = bio->bi_flags;37 bd->bi_iter = bio->bi_iter;38 bd->__bi_remaining = atomic_read(&bio->__bi_remaining);39 bd->bi_end_io = bio->bi_end_io;40#if defined(CONFIG_BLK_DEV_INTEGRITY)41 bd->bi_integrity = bio_integrity(bio);42#endif43}44 45static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)46{47 bio->bi_bdev = bd->bi_bdev;48 bio->bi_flags = bd->bi_flags;49 bio->bi_iter = bd->bi_iter;50 atomic_set(&bio->__bi_remaining, bd->__bi_remaining);51 bio->bi_end_io = bd->bi_end_io;52#if defined(CONFIG_BLK_DEV_INTEGRITY)53 bio->bi_integrity = bd->bi_integrity;54#endif55}56 57#endif58