[PATCH v5 2/8] block-backend: Introduce blk_get_guest_block_size()

[Xie Yongji <xieyongji@bytedance.com>]

Support getting the guest block size for the block backend.
It's needed for the following commit.

Signed-off-by: Xie Yongji <xieyongji@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;
+}
+
 void *blk_try_blockalign(BlockBackend *blk, size_t size)
 {
     IO_CODE();
diff --git a/include/sysemu/block-backend-io.h b/include/sysemu/block-backend-io.h
index 6517c39295..7600822196 100644
--- a/include/sysemu/block-backend-io.h
+++ b/include/sysemu/block-backend-io.h
@@ -73,6 +73,7 @@ void blk_iostatus_set_err(BlockBackend *blk, int error);
 int blk_get_max_iov(BlockBackend *blk);
 int blk_get_max_hw_iov(BlockBackend *blk);
 void blk_set_guest_block_size(BlockBackend *blk, int align);
+int blk_get_guest_block_size(BlockBackend *blk);
 
 void blk_io_plug(BlockBackend *blk);
 void blk_io_unplug(BlockBackend *blk);
-- 
2.20.1