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block: add a new helper bdev_{is_zone_start, offset_from_zone_start} 

Instead of open coding to check for zone start, add a helper to improve
readability and store the logic in one place.

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230110143635.77300-3-p.raghav@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pankaj Raghav 2023-01-10 15:36:34 +01:00 committed by Jens Axboe
parent fea127b36c
commit e29b210021
3 changed files with 15 additions and 3 deletions
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2
block/blk-core.c
View File

@ -570,7 +570,7 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q,
return BLK_STS_NOTSUPP;
/* The bio sector must point to the start of a sequential zone */
if (bio->bi_iter.bi_sector & (bdev_zone_sectors(bio->bi_bdev) - 1) ||
if (!bdev_is_zone_start(bio->bi_bdev, bio->bi_iter.bi_sector) ||
!bio_zone_is_seq(bio))
return BLK_STS_IOERR;

4
block/blk-zoned.c
View File

@ -277,10 +277,10 @@ int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
return -EINVAL;
/* Check alignment (handle eventual smaller last zone) */
if (sector & (zone_sectors - 1))
if (!bdev_is_zone_start(bdev, sector))
return -EINVAL;
if ((nr_sectors & (zone_sectors - 1)) && end_sector != capacity)
if (!bdev_is_zone_start(bdev, nr_sectors) && end_sector != capacity)
return -EINVAL;
/*

12
include/linux/blkdev.h
View File

@ -1306,6 +1306,18 @@ static inline sector_t bdev_zone_sectors(struct block_device *bdev)
return q->limits.chunk_sectors;
}
static inline sector_t bdev_offset_from_zone_start(struct block_device *bdev,
sector_t sector)
{
return sector & (bdev_zone_sectors(bdev) - 1);
}
static inline bool bdev_is_zone_start(struct block_device *bdev,
sector_t sector)
{
return bdev_offset_from_zone_start(bdev, sector) == 0;
}
static inline int queue_dma_alignment(const struct request_queue *q)
{
return q ? q->limits.dma_alignment : 511;