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@xxxxxxxxxxxxx>
---
include/linux/blkdev.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 12b9dbcc980e..805cd02d7914 100644
--- 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;
--
2.11.0
