mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
309dca309f
Replace the gendisk pointer in struct bio with a pointer to the newly improved struct block device. From that the gendisk can be trivially accessed with an extra indirection, but it also allows to directly look up all information related to partition remapping. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
55 lines
1.4 KiB
C
55 lines
1.4 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 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
|