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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/md/dm-bio-record.h | |
| parent | Initial commit. (diff) | |
| download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip | |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/md/dm-bio-record.h')
| -rw-r--r-- | drivers/md/dm-bio-record.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/md/dm-bio-record.h b/drivers/md/dm-bio-record.h new file mode 100644 index 0000000000..04d2f0cda3 --- /dev/null +++ b/drivers/md/dm-bio-record.h @@ -0,0 +1,57 @@ +/* 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 |