--- qemu/block.h	2018/04/24 16:56:47	1.1.1.3
+++ qemu/block.h	2018/04/24 17:02:01	1.1.1.4
@@ -169,4 +169,9 @@ void path_combine(char *dest, int dest_s
                   const char *base_path,
                   const char *filename);
 
+int bdrv_put_buffer(BlockDriverState *bs, const uint8_t *buf,
+                    int64_t pos, int size);
+
+int bdrv_get_buffer(BlockDriverState *bs, uint8_t *buf, int64_t pos, int size);
+
 #endif