rbd: fix read_iterate for sparse read

diff --git a/src/librbd.cc b/src/librbd.cc
index d66dfcf92f0e2ddc39eaf026b3f04250e9c21385..c390f57acc1ce94886327f41f1e94c1b22ea8d39 100644 (file)
--- a/src/librbd.cc
+++ b/src/librbd.cc
@@ -1167,6 +1167,7 @@ int64_t read_iterate(ImageCtx *ictx, uint64_t off, size_t len,
         return r;
       bl_ofs += extent_len;
       buf_bl_pos += extent_len;
+      block_ofs += extent_len;
     }
 
     /* last hole */