This is a note to let you know that I've just added the patch titled
block: Add a helper to validate the block size
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
block-add-a-helper-to-validate-the-block-size.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 570b1cac477643cbf01a45fa5d018430a1fddbce Mon Sep 17 00:00:00 2001
From: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
Date: Tue, 26 Oct 2021 22:40:12 +0800
Subject: block: Add a helper to validate the block size
From: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@xxxxxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
Patches currently in stable-queue which might be from xieyongji@xxxxxxxxxxxxx are
queue-5.15/loop-use-blk_validate_block_size-to-validate-block-size.patch
queue-5.15/block-add-a-helper-to-validate-the-block-size.patch
