From: Xie Yongji <xieyongji@xxxxxxxxxxxxx> 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: Xie Yongji <xieyongji@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@xxxxxxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Cc: Tadeusz Struk <tadeusz.struk@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- include/linux/blkdev.h | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -235,6 +235,14 @@ struct request { void *end_io_data; }; +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;
