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-rw-r--r--include/block/block_int.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h
index e264be9..7ad1950 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -412,6 +412,10 @@ struct BlockDriverState {
/* The error object in use for blocking operations on backing_hd */
Error *backing_blocker;
+
+ /* threshold limit for writes, in bytes. "High water mark". */
+ uint64_t write_threshold_offset;
+ NotifierWithReturn write_threshold_notifier;
};