| /* | |
| * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
| * | |
| * This file is released under the GPL. | |
| */ | |
| #ifndef DM_BIO_RECORD_H | |
| #define DM_BIO_RECORD_H | |
| #include <linux/bio.h> | |
| /* | |
| * There are lots of mutable fields in the bio struct that get | |
| * changed by the lower levels of the block layer. Some targets, | |
| * such as multipath, may wish to resubmit a bio on error. The | |
| * functions in this file help the target record and restore the | |
| * original bio state. | |
| */ | |
| struct dm_bio_details { | |
| sector_t bi_sector; | |
| struct block_device *bi_bdev; | |
| unsigned int bi_size; | |
| unsigned short bi_idx; | |
| unsigned long bi_flags; | |
| }; | |
| static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) | |
| { | |
| bd->bi_sector = bio->bi_sector; | |
| bd->bi_bdev = bio->bi_bdev; | |
| bd->bi_size = bio->bi_size; | |
| bd->bi_idx = bio->bi_idx; | |
| bd->bi_flags = bio->bi_flags; | |
| } | |
| static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) | |
| { | |
| bio->bi_sector = bd->bi_sector; | |
| bio->bi_bdev = bd->bi_bdev; | |
| bio->bi_size = bd->bi_size; | |
| bio->bi_idx = bd->bi_idx; | |
| bio->bi_flags = bd->bi_flags; | |
| } | |
| #endif |