From: John Garry <john.g.garry@oracle.com> mainline inclusion from mainline-v6.12-rc1 commit 1eadb157947163ca72ba8963b915fdc099ce6cca category: feature bugzilla: https://atomgit.com/openeuler/kernel/issues/8862 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... -------------------------------- Add helpers to get atomic write limits for a bdev, so that we don't access request_queue helpers outside the block layer. We check if the bdev can actually atomic write in these helpers, so we can avoid users missing using this check. Suggested-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20241019125113.369994-4-john.g.garry@oracle.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Long Li <leo.lilong@huawei.com> --- include/linux/blkdev.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 8ff5cb3ad89d..442c5c82b36b 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1697,6 +1697,22 @@ static inline bool bdev_can_atomic_write(struct block_device *bdev) return true; } +static inline unsigned int +bdev_atomic_write_unit_min_bytes(struct block_device *bdev) +{ + if (!bdev_can_atomic_write(bdev)) + return 0; + return queue_atomic_write_unit_min_bytes(bdev_get_queue(bdev)); +} + +static inline unsigned int +bdev_atomic_write_unit_max_bytes(struct block_device *bdev) +{ + if (!bdev_can_atomic_write(bdev)) + return 0; + return queue_atomic_write_unit_max_bytes(bdev_get_queue(bdev)); +} + #define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { } #endif /* _LINUX_BLKDEV_H */ -- 2.52.0