+/**
+ * Implementation of ldlm_valblock_ops::lvbo_fill for MDT.
+ *
+ * This function is called to fill the given RPC buffer \a buf with LVB data
+ *
+ * \param[in] env execution environment
+ * \param[in] lock LDLM lock
+ * \param[in] buf RPC buffer to fill
+ * \param[in,out] lvblen lvb buffer length
+ *
+ * \retval size of LVB data written into \a buf buffer
+ * or -ERANGE when the provided @lvblen is not big enough,
+ * and the needed lvb buffer size will be returned in
+ * @lvblen
+ */
+static int mdt_lvbo_fill(struct ldlm_lock *lock,
+ void *lvb, int *lvblen)