From: Xie Yongji xieyongji@bytedance.com
From: Xie Yongji xieyongji@bytedance.com
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 Signed-off-by: Tadeusz Struk tadeusz.struk@linaro.org --- include/linux/blkdev.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 4ba17736b614..98fdf5a31fd6 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -59,6 +59,14 @@ struct blk_keyslot_manager; */ #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);
/*