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55 lines
1.4 KiB
55 lines
1.4 KiB
/* |
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* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. |
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* |
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* This file is released under the GPL. |
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*/ |
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#ifndef DM_BIO_RECORD_H |
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#define DM_BIO_RECORD_H |
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#include <linux/bio.h> |
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/* |
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* There are lots of mutable fields in the bio struct that get |
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* changed by the lower levels of the block layer. Some targets, |
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* such as multipath, may wish to resubmit a bio on error. The |
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* functions in this file help the target record and restore the |
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* original bio state. |
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*/ |
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struct dm_bio_details { |
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struct block_device *bi_bdev; |
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int __bi_remaining; |
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unsigned long bi_flags; |
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struct bvec_iter bi_iter; |
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bio_end_io_t *bi_end_io; |
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#if defined(CONFIG_BLK_DEV_INTEGRITY) |
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struct bio_integrity_payload *bi_integrity; |
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#endif |
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}; |
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static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) |
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{ |
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bd->bi_bdev = bio->bi_bdev; |
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bd->bi_flags = bio->bi_flags; |
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bd->bi_iter = bio->bi_iter; |
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bd->__bi_remaining = atomic_read(&bio->__bi_remaining); |
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bd->bi_end_io = bio->bi_end_io; |
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#if defined(CONFIG_BLK_DEV_INTEGRITY) |
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bd->bi_integrity = bio_integrity(bio); |
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#endif |
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} |
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static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) |
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{ |
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bio->bi_bdev = bd->bi_bdev; |
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bio->bi_flags = bd->bi_flags; |
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bio->bi_iter = bd->bi_iter; |
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atomic_set(&bio->__bi_remaining, bd->__bi_remaining); |
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bio->bi_end_io = bd->bi_end_io; |
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#if defined(CONFIG_BLK_DEV_INTEGRITY) |
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bio->bi_integrity = bd->bi_integrity; |
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#endif |
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} |
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#endif
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