-extern int fio_net_send_cmd(int, uint16_t, const void *, off_t);
-extern int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t serial);
+extern int fio_net_send_cmd(int, uint16_t, const void *, off_t, uint64_t);
+extern int fio_net_send_simple_cmd(int sk, uint16_t opcode, uint64_t tag);