projects / linux-2.6-block.git / blame
| 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 | */ | |
| a920f6b3 | 19 | |
| 1da177e4 | 20 | struct dm_bio_details { |
| 1da177e4 | 21 | struct block_device *bi_bdev; |
| 1da177e4 | 22 | unsigned long bi_flags; |
| 75d5d815 | 23 | struct bvec_iter bi_iter; |
| 1da177e4 LT |
24 | }; |
| 25 | ||
| 26 | static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) | |
| 27 | { | |
| 1da177e4 | 28 | bd->bi_bdev = bio->bi_bdev; |
| 1da177e4 | 29 | bd->bi_flags = bio->bi_flags; |
| 75d5d815 | 30 | bd->bi_iter = bio->bi_iter; |
| 1da177e4 LT |
31 | } |
| 32 | ||
| 33 | static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) | |
| 34 | { | |
| 1da177e4 | 35 | bio->bi_bdev = bd->bi_bdev; |
| 1da177e4 | 36 | bio->bi_flags = bd->bi_flags; |
| 75d5d815 | 37 | bio->bi_iter = bd->bi_iter; |
| 1da177e4 LT |
38 | } |
| 39 | ||
| 40 | #endif |