cls_rbd: note overlap units

Signed-off-by: Sage Weil <sage@inktank.com>

diff --git a/src/librbd/cls_rbd.h b/src/librbd/cls_rbd.h
index 5bb2d4826fc4edfa18981ebef18c0c9c7e60114b..ec93909bba28caf7bc5e28e7ca07eb3aa1e5d727 100644 (file)
--- a/src/librbd/cls_rbd.h
+++ b/src/librbd/cls_rbd.h
@@ -10,7 +10,7 @@ struct cls_rbd_parent {
   int64_t pool;        ///< parent pool id
   string id;           ///< parent image id
   snapid_t snapid;     ///< parent snapid we refer to
-  uint64_t overlap;    ///< portion of this image mapped onto parent
+  uint64_t overlap;    ///< portion of this image mapped onto parent (bytes)
 
   /// true if our parent pointer information is defined
   bool exists() const {