blob: 745e3ab4aa0af1449852aca186e1a081fb38ab84 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
/*
* 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>
#include <linux/blk-integrity.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;
int __bi_remaining;
unsigned long bi_flags;
struct bvec_iter bi_iter;
bio_end_io_t *bi_end_io;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
struct bio_integrity_payload *bi_integrity;
#endif
};
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;
bd->__bi_remaining = atomic_read(&bio->__bi_remaining);
bd->bi_end_io = bio->bi_end_io;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
bd->bi_integrity = bio_integrity(bio);
#endif
}
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;
atomic_set(&bio->__bi_remaining, bd->__bi_remaining);
bio->bi_end_io = bd->bi_end_io;
#if defined(CONFIG_BLK_DEV_INTEGRITY)
bio->bi_integrity = bd->bi_integrity;
#endif
}
#endif
|
