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block: Add a helper to validate the block size

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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@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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xie Yongji
2021-10-26 22:40:12 +08:00
committed by Greg Kroah-Hartman
parent eaafc59005
commit 79ff56c613
1 changed files with 8 additions and 0 deletions
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8
include/linux/blkdev.h
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@@ -59,6 +59,14 @@ struct blk_keyslot_manager;
*/ */
#define BLKCG_MAX_POLS 5 #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); typedef void (rq_end_io_fn)(struct request *, blk_status_t);
/* /*