diff options
| author | Xie Yongji <xieyongji@bytedance.com> | 2021-10-26 22:40:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-21 13:46:35 +0100 |
| commit | 79ff56c613c193744d6be77d4c50a7ae22d6dd01 (patch) | |
| tree | 8e2c1257bb5de42cf3f17adc072cc0398a562927 | |
| parent | eaafc590053b314d4907017044ba2e739893c17c (diff) | |
block: Add a helper to validate the block size
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>
| -rw-r--r-- | include/linux/blkdev.h | 8 |
1 files changed, 8 insertions, 0 deletions
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); /* |