blob: 2ea0360108e1d41b57a39b5c5df715c52a641442 [file] [log] [blame]
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
* This file is released under the GPL.
#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 gendisk *bi_disk;
u8 bi_partno;
int __bi_remaining;
unsigned long bi_flags;
struct bvec_iter bi_iter;
bio_end_io_t *bi_end_io;
struct bio_integrity_payload *bi_integrity;
static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
bd->bi_disk = bio->bi_disk;
bd->bi_partno = bio->bi_partno;
bd->bi_flags = bio->bi_flags;
bd->bi_iter = bio->bi_iter;
bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
bd->bi_end_io = bio->bi_end_io;
bd->bi_integrity = bio_integrity(bio);
static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
bio->bi_disk = bd->bi_disk;
bio->bi_partno = bd->bi_partno;
bio->bi_flags = bd->bi_flags;
bio->bi_iter = bd->bi_iter;
atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
bio->bi_end_io = bd->bi_end_io;
bio->bi_integrity = bd->bi_integrity;