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_H
 9#define DM_BIO_RECORD_H
10
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 get
16 * changed by the lower levels of the block layer.  Some targets,
17 * such as multipath, may wish to resubmit a bio on error.  The
18 * functions in this file help the target record and restore the
19 * 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#endif
31};
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#endif
43}
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#endif
55}
56
57#endif

 
 1/*
 2 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
 3 *
 4 * This file is released under the GPL.
 5 */
 6
 7#ifndef DM_BIO_RECORD_H
 8#define DM_BIO_RECORD_H
 9
10#include <linux/bio.h>
 
11
12/*
13 * There are lots of mutable fields in the bio struct that get
14 * changed by the lower levels of the block layer.  Some targets,
15 * such as multipath, may wish to resubmit a bio on error.  The
16 * functions in this file help the target record and restore the
17 * original bio state.
18 */
19
20struct dm_bio_details {
21	struct block_device *bi_bdev;
 
22	unsigned long bi_flags;
23	struct bvec_iter bi_iter;
 
 
 
 
24};
25
26static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
27{
28	bd->bi_bdev = bio->bi_bdev;
29	bd->bi_flags = bio->bi_flags;
30	bd->bi_iter = bio->bi_iter;
 
 
 
 
 
31}
32
33static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
34{
35	bio->bi_bdev = bd->bi_bdev;
36	bio->bi_flags = bd->bi_flags;
37	bio->bi_iter = bd->bi_iter;
 
 
 
 
 
38}
39
40#endif