[v7,16/32] qcow2: Add qcow2_cluster_is_allocated()

Commit Message

Alberto Garcia May 25, 2020, 6:08 p.m. UTC

This helper function tells us if a cluster is allocated (that is,
there is an associated host offset for it).

Signed-off-by: Alberto Garcia <[e-mail]>
Reviewed-by: Eric Blake <[e-mail]>
---
 block/qcow2.h | 6 ++++++
 1 file changed, 6 insertions(+)

Patch

diff --git a/block/qcow2.h b/block/qcow2.h
index 27dbcbc502..ba7614e406 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -780,6 +780,12 @@  QCow2SubclusterType qcow2_get_subcluster_type(BlockDriverState *bs,
     }
 }
 
+static inline bool qcow2_cluster_is_allocated(QCow2ClusterType type)
+{
+    return (type == QCOW2_CLUSTER_COMPRESSED || type == QCOW2_CLUSTER_NORMAL ||
+            type == QCOW2_CLUSTER_ZERO_ALLOC);
+}
+
 /* Check whether refcounts are eager or lazy */
 static inline bool qcow2_need_accurate_refcounts(BDRVQcow2State *s)
 {