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-rw-r--r--include/block/block_int.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 805414619d..a6b13adb45 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -439,6 +439,11 @@ struct BlockDriverState {
int copy_on_read; /* if nonzero, copy read backing sectors into image.
note this is a reference count */
+ CoQueue flush_queue; /* Serializing flush queue */
+ unsigned int write_gen; /* Current data generation */
+ unsigned int flush_started_gen; /* Generation for which flush has started */
+ unsigned int flushed_gen; /* Flushed write generation */
+
BlockDriver *drv; /* NULL means no media */
void *opaque;