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| author | Xie Yongji <xieyongji@bytedance.com> | 2021-10-26 22:40:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 09:06:28 +0200 |
| commit | 35076e0847b72037c5a721bc1689ba81417335b7 (patch) | |
| tree | 6554feb3e0b4c047aa19adb793c94fb2b87c2ddc /include | |
| parent | 7b0e01a9b7f2aaeb6fa73b35864b1d7dc6e795c4 (diff) | |
| download | linux-35076e0847b72037c5a721bc1689ba81417335b7.tar.gz linux-35076e0847b72037c5a721bc1689ba81417335b7.tar.bz2 linux-35076e0847b72037c5a721bc1689ba81417335b7.zip | |
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: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -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 848aab6c6982..805072406552 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -49,6 +49,14 @@ struct pr_ops; typedef void (rq_end_io_fn)(struct request *, int); +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; +} + #define BLK_RL_SYNCFULL (1U << 0) #define BLK_RL_ASYNCFULL (1U << 1) |