]>
Commit | Line | Data |
---|---|---|
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 | */ | |
19 | struct dm_bio_details { | |
20 | sector_t bi_sector; | |
21 | struct block_device *bi_bdev; | |
22 | unsigned int bi_size; | |
23 | unsigned short bi_idx; | |
24 | unsigned long bi_flags; | |
25 | }; | |
26 | ||
27 | static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) | |
28 | { | |
29 | bd->bi_sector = bio->bi_sector; | |
30 | bd->bi_bdev = bio->bi_bdev; | |
31 | bd->bi_size = bio->bi_size; | |
32 | bd->bi_idx = bio->bi_idx; | |
33 | bd->bi_flags = bio->bi_flags; | |
34 | } | |
35 | ||
36 | static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) | |
37 | { | |
38 | bio->bi_sector = bd->bi_sector; | |
39 | bio->bi_bdev = bd->bi_bdev; | |
40 | bio->bi_size = bd->bi_size; | |
41 | bio->bi_idx = bd->bi_idx; | |
42 | bio->bi_flags = bd->bi_flags; | |
43 | } | |
44 | ||
45 | #endif |