1/*
 2 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
 3 *
 4 * This file is released under the GPL.
 5 */
 6
 7#ifndef DM_BIO_RECORD_H
 8#define DM_BIO_RECORD_H
 9
10#include <linux/bio.h>
11#include <linux/blk-integrity.h>
12
13/*
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
18 * original bio state.
19 */
20
21struct dm_bio_details {
22	struct block_device *bi_bdev;
23	int __bi_remaining;
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;
29#endif
30};
31
32static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
33{
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);
41#endif
42}
43
44static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
45{
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;
53#endif
54}
55
56#endif

 1/*
 2 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
 3 *
 4 * This file is released under the GPL.
 5 */
 6
 7#ifndef DM_BIO_RECORD_H
 8#define DM_BIO_RECORD_H
 9
10#include <linux/bio.h>
 
11
12/*
13 * There are lots of mutable fields in the bio struct that get
14 * changed by the lower levels of the block layer.  Some targets,
15 * such as multipath, may wish to resubmit a bio on error.  The
16 * functions in this file help the target record and restore the
17 * original bio state.
18 */
19
20struct dm_bio_details {
21	struct block_device *bi_bdev;
22	int __bi_remaining;
23	unsigned long bi_flags;
24	struct bvec_iter bi_iter;
25	bio_end_io_t *bi_end_io;
26#if defined(CONFIG_BLK_DEV_INTEGRITY)
27	struct bio_integrity_payload *bi_integrity;
28#endif
29};
30
31static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
32{
33	bd->bi_bdev = bio->bi_bdev;
34	bd->bi_flags = bio->bi_flags;
35	bd->bi_iter = bio->bi_iter;
36	bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
37	bd->bi_end_io = bio->bi_end_io;
38#if defined(CONFIG_BLK_DEV_INTEGRITY)
39	bd->bi_integrity = bio_integrity(bio);
40#endif
41}
42
43static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
44{
45	bio->bi_bdev = bd->bi_bdev;
46	bio->bi_flags = bd->bi_flags;
47	bio->bi_iter = bd->bi_iter;
48	atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
49	bio->bi_end_io = bd->bi_end_io;
50#if defined(CONFIG_BLK_DEV_INTEGRITY)
51	bio->bi_integrity = bd->bi_integrity;
52#endif
53}
54
55#endif