2 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
4 * This file is released under the GPL.
7 #ifndef DM_BIO_RECORD_H
8 #define DM_BIO_RECORD_H
10 #include <linux/bio.h>
11 #include <linux/blk-integrity.h>
14 * There are lots of mutable fields in the bio struct that get
15 * changed by the lower levels of the block layer. Some targets,
16 * such as multipath, may wish to resubmit a bio on error. The
17 * functions in this file help the target record and restore the
21 struct dm_bio_details {
22 struct block_device *bi_bdev;
24 unsigned long bi_flags;
25 struct bvec_iter bi_iter;
26 bio_end_io_t *bi_end_io;
27 #if defined(CONFIG_BLK_DEV_INTEGRITY)
28 struct bio_integrity_payload *bi_integrity;
32 static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
34 bd->bi_bdev = bio->bi_bdev;
35 bd->bi_flags = bio->bi_flags;
36 bd->bi_iter = bio->bi_iter;
37 bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
38 bd->bi_end_io = bio->bi_end_io;
39 #if defined(CONFIG_BLK_DEV_INTEGRITY)
40 bd->bi_integrity = bio_integrity(bio);
44 static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
46 bio->bi_bdev = bd->bi_bdev;
47 bio->bi_flags = bd->bi_flags;
48 bio->bi_iter = bd->bi_iter;
49 atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
50 bio->bi_end_io = bd->bi_end_io;
51 #if defined(CONFIG_BLK_DEV_INTEGRITY)
52 bio->bi_integrity = bd->bi_integrity;