Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 12/20] block: Add a helper to validate the block size | Date | Fri, 19 Nov 2021 18:39:30 +0100 |
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From: Xie Yongji <xieyongji@bytedance.com>
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> Cc: Tadeusz Struk <tadeusz.struk@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- 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;
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