From: Xie Yongji xieyongji@bytedance.com
stable inclusion from stable-5.10.81 commit 79ff56c613c193744d6be77d4c50a7ae22d6dd01 bugzilla: 185832 https://gitee.com/openeuler/kernel/issues/I4L9CF
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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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: Tadeusz Struk tadeusz.struk@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com --- include/linux/blkdev.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 9d3e7760b092..f02a74feee63 100644 --- 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);
/*