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block: Add a public bdev_zone_is_seq() helper

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Turn the private disk_zone_is_conv() function in blk-zoned.c into a
public and documented bdev_zone_is_seq() helper with the inverse
polarity of the original function, also adding a check for non-zoned
devices so that all file systems can use the helper, even with a regular
block device.

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20241107064300.227731-3-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal
2024-11-07 15:43:00 +09:00
committed by Jens Axboe
parent d7cb6d7414
commit f3d9bf0514
2 changed files with 29 additions and 15 deletions
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27
include/linux/blkdev.h
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@@ -1395,6 +1395,33 @@ static inline bool bdev_is_zone_start(struct block_device *bdev,
return bdev_offset_from_zone_start(bdev, sector) == 0;
}
/**
* bdev_zone_is_seq - check if a sector belongs to a sequential write zone
* @bdev: block device to check
* @sector: sector number
*
* Check if @sector on @bdev is contained in a sequential write required zone.
*/
static inline bool bdev_zone_is_seq(struct block_device *bdev, sector_t sector)
{
bool is_seq = false;
#if IS_ENABLED(CONFIG_BLK_DEV_ZONED)
if (bdev_is_zoned(bdev)) {
struct gendisk *disk = bdev->bd_disk;
unsigned long *bitmap;
rcu_read_lock();
bitmap = rcu_dereference(disk->conv_zones_bitmap);
is_seq = !bitmap ||
!test_bit(disk_zone_no(disk, sector), bitmap);
rcu_read_unlock();
}
#endif
return is_seq;
}
static inline int queue_dma_alignment(const struct request_queue *q)
{
return q->limits.dma_alignment;