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Message-Id: <20211119171443.973003563@linuxfoundation.org>
Date: Fri, 19 Nov 2021 18:37:37 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Xie Yongji <xieyongji@...edance.com>,
Jens Axboe <axboe@...nel.dk>,
Tadeusz Struk <tadeusz.struk@...aro.org>
Subject: [PATCH 5.10 02/21] block: Add a helper to validate the block size
From: Xie Yongji <xieyongji@...edance.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@...edance.com>
Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@bytedance.com
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Tadeusz Struk <tadeusz.struk@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
include/linux/blkdev.h | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -59,6 +59,14 @@ struct blk_keyslot_manager;
*/
#define BLKCG_MAX_POLS 5
+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;
+}
+
typedef void (rq_end_io_fn)(struct request *, blk_status_t);
/*
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