/*
|
* 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 {
|
struct block_device *bi_bdev;
|
unsigned long bi_flags;
|
struct bvec_iter bi_iter;
|
};
|
|
static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
|
{
|
bd->bi_bdev = bio->bi_bdev;
|
bd->bi_flags = bio->bi_flags;
|
bd->bi_iter = bio->bi_iter;
|
}
|
|
static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
|
{
|
bio->bi_bdev = bd->bi_bdev;
|
bio->bi_flags = bd->bi_flags;
|
bio->bi_iter = bd->bi_iter;
|
}
|
|
#endif
|
