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1da177e4 LT |
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 | */ | |
a920f6b3 | 19 | |
1da177e4 | 20 | struct dm_bio_details { |
74d46992 CH |
21 | struct gendisk *bi_disk; |
22 | u8 bi_partno; | |
1da177e4 | 23 | unsigned long bi_flags; |
75d5d815 | 24 | struct bvec_iter bi_iter; |
1da177e4 LT |
25 | }; |
26 | ||
27 | static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) | |
28 | { | |
74d46992 CH |
29 | bd->bi_disk = bio->bi_disk; |
30 | bd->bi_partno = bio->bi_partno; | |
1da177e4 | 31 | bd->bi_flags = bio->bi_flags; |
75d5d815 | 32 | bd->bi_iter = bio->bi_iter; |
1da177e4 LT |
33 | } |
34 | ||
35 | static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) | |
36 | { | |
74d46992 CH |
37 | bio->bi_disk = bd->bi_disk; |
38 | bio->bi_partno = bd->bi_partno; | |
1da177e4 | 39 | bio->bi_flags = bd->bi_flags; |
75d5d815 | 40 | bio->bi_iter = bd->bi_iter; |
1da177e4 LT |
41 | } |
42 | ||
43 | #endif |