code: func newIocltSlaveReq(slave, master string) *IfreqSlave {
  	ifreq := &IfreqSlave{}
  	copy(ifreq.Name[:unix.IFNAMSIZ-1], master)
  	copy(ifreq.Slave[:unix.IFNAMSIZ-1], slave)
  	return ifreq
  }
docs: // newIocltSlaveReq returns filled IfreqSlave with proper interface names
  // It is used by ioctl to assign slave to bond master