Commit 570b1cac authored by Xie Yongji's avatar Xie Yongji Committed by Jens Axboe
Browse files

block: Add a helper to validate the block size 



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>
parent c7b84d42

include/linux/blkdev.h

+8 −0
Original line number Diff line number Diff line
@@ -44,6 +44,14 @@ struct blk_crypto_profile; 
 */

#define BLKCG_MAX_POLS		6



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;

}



static inline bool blk_op_is_passthrough(unsigned int op)

{

	op &= REQ_OP_MASK;