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3bd94003 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 LT |
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> | |
fe45e630 | 12 | #include <linux/blk-integrity.h> |
1da177e4 LT |
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 | */ | |
a920f6b3 | 21 | |
1da177e4 | 22 | struct dm_bio_details { |
309dca30 | 23 | struct block_device *bi_bdev; |
1b17159e | 24 | int __bi_remaining; |
1da177e4 | 25 | unsigned long bi_flags; |
75d5d815 | 26 | struct bvec_iter bi_iter; |
1b17159e MS |
27 | bio_end_io_t *bi_end_io; |
28 | #if defined(CONFIG_BLK_DEV_INTEGRITY) | |
29 | struct bio_integrity_payload *bi_integrity; | |
30 | #endif | |
1da177e4 LT |
31 | }; |
32 | ||
33 | static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) | |
34 | { | |
309dca30 | 35 | bd->bi_bdev = bio->bi_bdev; |
1da177e4 | 36 | bd->bi_flags = bio->bi_flags; |
75d5d815 | 37 | bd->bi_iter = bio->bi_iter; |
1b17159e MS |
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 | |
1da177e4 LT |
43 | } |
44 | ||
45 | static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) | |
46 | { | |
309dca30 | 47 | bio->bi_bdev = bd->bi_bdev; |
1da177e4 | 48 | bio->bi_flags = bd->bi_flags; |
75d5d815 | 49 | bio->bi_iter = bd->bi_iter; |
1b17159e MS |
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 | |
1da177e4 LT |
55 | } |
56 | ||
57 | #endif |