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Commit 602210eb authored by Xie Yongji's avatar Xie Yongji Committed by Greg Kroah-Hartman
Browse files

block: Add a helper to validate the block size 



commit 570b1cac477643cbf01a45fa5d018430a1fddbce upstream.

There are some duplicated codes to validate the block
size in block drivers. This limitation actually comes
from block layer, so this patch tries to add a new block
layer helper for that.

Signed-off-by: default avatarXie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@bytedance.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent cb64bd03

include/linux/blkdev.h

+8 −0
Original line number Diff line number Diff line
@@ -56,6 +56,14 @@ struct blk_stat_callback; 
 */

#define BLKCG_MAX_POLS		5



static inline int blk_validate_block_size(unsigned int bsize)

{

	if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))

		return -EINVAL;



	return 0;

}



typedef void (rq_end_io_fn)(struct request *, blk_status_t);



#define BLK_RL_SYNCFULL		(1U << 0)