mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 18:10:52 +07:00
1b17159e52
Also, save/restore __bi_remaining in case the bio was used in a BIO_CHAIN (e.g. due to blk_queue_split). Suggested-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
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 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;
|
|
#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_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;
|
|
#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_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;
|
|
#if defined(CONFIG_BLK_DEV_INTEGRITY)
|
|
bio->bi_integrity = bd->bi_integrity;
|
|
#endif
|
|
}
|
|
|
|
#endif
|