1c3b13e64c
We need to convert the dm code to the new bvec_iter primitives which respect bi_bvec_done; they also allow us to drastically simplify dm's bio splitting code. Also, it's no longer necessary to save/restore the bvec array anymore - driver conversions for immutable bvecs are done, so drivers should never be modifying it. Also kill bio_sector_offset(), dm was the only user and it doesn't make much sense anymore. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Alasdair Kergon <agk@redhat.com> Cc: dm-devel@redhat.com Reviewed-by: Mike Snitzer <snitzer@redhat.com>
40 lines
936 B
C
40 lines
936 B
C
/*
|
|
* 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
|