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block: Add a helper to validate the block size 

commit 570b1cac47 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>
This commit is contained in:
Xie Yongji 2021-10-26 22:40:12 +08:00 committed by Greg Kroah-Hartman
parent 8d0956438e
commit 1f124a6611
1 changed files with 8 additions and 0 deletions
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8
include/linux/blkdev.h
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@ -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;