linux/drivers/md/dm-bio-record.h
Heinz Mauelshagen 3bd9400307 dm: add missing SPDX-License-Indentifiers
'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has
deprecated its use.

Suggested-by: John Wiele <jwiele@redhat.com>
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
2023-02-14 14:23:06 -05:00

58 lines
1.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 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