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block: move bio_integrity_{intervals,bytes} into blkdev.h

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This allows bio_integrity_bytes() to be called from drivers instead of
open coding it.

Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Edwards <gedwards@ddn.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Greg Edwards 2018-07-25 10:22:58 -04:00 • committed by Jens Axboe
parent d3df0ac096
commit 359f642700
2 changed files with 34 additions and 22 deletions
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22
block/bio-integrity.c
View file

@ -159,28 +159,6 @@ int bio_integrity_add_page(struct bio *bio, struct page *page,
} }
EXPORT_SYMBOL(bio_integrity_add_page); EXPORT_SYMBOL(bio_integrity_add_page);
/**
* bio_integrity_intervals - Return number of integrity intervals for a bio
* @bi: blk_integrity profile for device
* @sectors: Size of the bio in 512-byte sectors
*
* Description: The block layer calculates everything in 512 byte
* sectors but integrity metadata is done in terms of the data integrity
* interval size of the storage device. Convert the block layer sectors
* to the appropriate number of integrity intervals.
*/
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
unsigned int sectors)
{
return sectors >> (bi->interval_exp - 9);
}
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
unsigned int sectors)
{
return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
}
/** /**
* bio_integrity_process - Process integrity metadata for a bio * bio_integrity_process - Process integrity metadata for a bio
* @bio: bio to generate/verify integrity metadata for * @bio: bio to generate/verify integrity metadata for

34
include/linux/blkdev.h
View file

@ -1865,6 +1865,28 @@ static inline bool integrity_req_gap_front_merge(struct request *req,
bip_next->bip_vec[0].bv_offset); bip_next->bip_vec[0].bv_offset);
} }
/**
* bio_integrity_intervals - Return number of integrity intervals for a bio
* @bi: blk_integrity profile for device
* @sectors: Size of the bio in 512-byte sectors
*
* Description: The block layer calculates everything in 512 byte
* sectors but integrity metadata is done in terms of the data integrity
* interval size of the storage device. Convert the block layer sectors
* to the appropriate number of integrity intervals.
*/
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
unsigned int sectors)
{
return sectors >> (bi->interval_exp - 9);
}
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
unsigned int sectors)
{
return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
}
#else /* CONFIG_BLK_DEV_INTEGRITY */ #else /* CONFIG_BLK_DEV_INTEGRITY */
struct bio; struct bio;
@ -1938,6 +1960,18 @@ static inline bool integrity_req_gap_front_merge(struct request *req,
return false; return false;
} }
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
unsigned int sectors)
{
return 0;
}
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
unsigned int sectors)
{
return 0;
}
#endif /* CONFIG_BLK_DEV_INTEGRITY */ #endif /* CONFIG_BLK_DEV_INTEGRITY */
struct block_device_operations { struct block_device_operations {