-int gmnal_small_rx(lib_nal_t *, void *, lib_msg_t *, unsigned int,
- struct iovec *, size_t, size_t);
-int gmnal_small_tx(lib_nal_t *, void *, lib_msg_t *, ptl_hdr_t *,
+ptl_err_t gmnal_small_rx(lib_nal_t *, void *, lib_msg_t *);
+ptl_err_t gmnal_small_tx(lib_nal_t *, void *, lib_msg_t *, ptl_hdr_t *,