qcow2: Optimize the refcount-block overlap check

[qemu.git] / block / qcow2.h

diff --git a/block/qcow2.h b/block/qcow2.h
index 182341483a292193f61e1e027db3e89db6b7c20f..f8aeb0879436e9c274413e02f81097838b6c9a26 100644 (file)
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -251,6 +251,7 @@ typedef struct BDRVQcow2State {
     uint64_t *refcount_table;
     uint64_t refcount_table_offset;
     uint32_t refcount_table_size;
+    uint32_t max_refcount_table_index; /* Last used entry in refcount_table */
     uint64_t free_cluster_index;
     uint64_t free_byte_offset;