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block: Add a helper to validate the block size

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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: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Xie Yongji 2021-10-26 22:40:12 +08:00 committed by Jens Axboe
parent c7b84d4226
commit 570b1cac47
1 changed files with 8 additions and 0 deletions
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8
include/linux/blkdev.h
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@ -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;