[v9,16/34] qcow2: Add qcow2_cluster_is_allocated()

Commit Message

Alberto Garcia June 28, 2020, 11:02 a.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(+)

Comments

Max Reitz July 1, 2020, 1:55 p.m. UTC | #1

On 28.06.20 13:02, Alberto Garcia wrote:
> 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(+)

Reviewed-by: Max Reitz <[e-mail]>

Patch

diff --git a/block/qcow2.h b/block/qcow2.h
index 3aec6f452a..ea647c8bb5 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)
 {