diff --git a/block/vmdk.c b/block/vmdk.c
index 1bba61ad7d..5b0eae877e 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -2898,12 +2898,12 @@ static int vmdk_has_zero_init(BlockDriverState *bs)
     return 1;
 }
 
-static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent)
+static VmdkExtentInfo *vmdk_get_extent_info(VmdkExtent *extent)
 {
-    ImageInfo *info = g_new0(ImageInfo, 1);
+    VmdkExtentInfo *info = g_new0(VmdkExtentInfo, 1);
 
     bdrv_refresh_filename(extent->file->bs);
-    *info = (ImageInfo){
+    *info = (VmdkExtentInfo){
         .filename         = g_strdup(extent->file->bs->filename),
         .format           = g_strdup(extent->type),
         .virtual_size     = extent->sectors * BDRV_SECTOR_SIZE,
@@ -2982,7 +2982,7 @@ static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs,
     int i;
     BDRVVmdkState *s = bs->opaque;
     ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1);
-    ImageInfoList **tail;
+    VmdkExtentInfoList **tail;
 
     *spec_info = (ImageInfoSpecific){
         .type = IMAGE_INFO_SPECIFIC_KIND_VMDK,
diff --git a/qapi/block-core.json b/qapi/block-core.json
index f5d822cbd6..4b9365167f 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -124,7 +124,33 @@
       'create-type': 'str',
       'cid': 'int',
       'parent-cid': 'int',
-      'extents': ['ImageInfo']
+      'extents': ['VmdkExtentInfo']
+  } }
+
+##
+# @VmdkExtentInfo:
+#
+# Information about a VMDK extent file
+#
+# @filename: Name of the extent file
+#
+# @format: Extent type (e.g. FLAT or SPARSE)
+#
+# @virtual-size: Number of bytes covered by this extent
+#
+# @cluster-size: Cluster size in bytes (for non-flat extents)
+#
+# @compressed: Whether this extent contains compressed data
+#
+# Since: 8.0
+##
+{ 'struct': 'VmdkExtentInfo',
+  'data': {
+      'filename': 'str',
+      'format': 'str',
+      'virtual-size': 'int',
+      '*cluster-size': 'int',
+      '*compressed': 'bool'
   } }
 
 ##
@@ -5754,3 +5780,13 @@
   'data': { 'device': 'str', '*id': 'str', '*name': 'str'},
   'returns': 'SnapshotInfo',
   'allow-preconfig': true }
+
+##
+# @DummyBlockCoreForceArrays:
+#
+# Not used by QMP; hack to let us use ImageInfoList internally
+#
+# Since: 8.0
+##
+{ 'struct': 'DummyBlockCoreForceArrays',
+  'data': { 'unused-image-info': ['ImageInfo'] } }