On Wed, May 04, 2022 at 03:40:45PM +0800, Xie Yongji wrote:
> Support getting the guest block size for the block backend.
> It's needed for the following commit.
>
> Signed-off-by: Xie Yongji <xieyon...@bytedance.com>
> ---
> block/block-backend.c | 6 ++++++
> include/sysemu/block-backend-io.h | 1 +
> 2 files changed, 7 insertions(+)
>
> diff --git a/block/block-backend.c b/block/block-backend.c
> index 35457a6a1d..1582ff81c9 100644
> --- a/block/block-backend.c
> +++ b/block/block-backend.c
> @@ -2106,6 +2106,12 @@ void blk_set_guest_block_size(BlockBackend *blk, int
> align)
> blk->guest_block_size = align;
> }
>
> +int blk_get_guest_block_size(BlockBackend *blk)
> +{
> + IO_CODE();
> + return blk->guest_block_size;I have sent a patch to remove blk->guest_block_size because this field is currently unused. I think there is a cleaner way for this patch series to store the guest logical_block_size (see next patch). Stashing it in BlockBackend was attractive because virtio-blk-handler.c lacks a struct to store its parameters (writable, serial, logical_block_size), but if such a struct is introduced then there's no need to stash it in BlockBackend. Stefan
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