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block: Introduce bio_straddles_zones() and bio_offset_from_zone_start()

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Implement the inline helper functions bio_straddles_zones() and
bio_offset_from_zone_start() to respectively test if a BIO crosses a
zone boundary (the start sector and last sector belong to different
zones) and to obtain the offset of a BIO from the start sector of its
target zone.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20240408014128.205141-5-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal 2024-04-08 10:41:04 +09:00 committed by Jens Axboe
parent a0508c36ef
commit b85a3c1b79
1 changed files with 13 additions and 0 deletions
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13
include/linux/blkdev.h
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@ -853,6 +853,13 @@ static inline unsigned int bio_zone_no(struct bio *bio)
return disk_zone_no(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector);
}
static inline bool bio_straddles_zones(struct bio *bio)
{
return bio_sectors(bio) &&
bio_zone_no(bio) !=
disk_zone_no(bio->bi_bdev->bd_disk, bio_end_sector(bio) - 1);
}
static inline unsigned int bio_zone_is_seq(struct bio *bio)
{
return disk_zone_is_seq(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector);
@ -1328,6 +1335,12 @@ static inline sector_t bdev_offset_from_zone_start(struct block_device *bdev,
return sector & (bdev_zone_sectors(bdev) - 1);
}
static inline sector_t bio_offset_from_zone_start(struct bio *bio)
{
return bdev_offset_from_zone_start(bio->bi_bdev,
bio->bi_iter.bi_sector);
}
static inline bool bdev_is_zone_start(struct block_device *bdev,
sector_t sector)
{