sensordatahandler.hpp - openbmc/phosphor-host-ipmid - Gitiles

 #pragma once

 #include "config.h"

 #include "sensorhandler.hpp"

 #include <cmath>
 #include <ipmid/api.hpp>
 #include <ipmid/types.hpp>
 #include <ipmid/utils.hpp>
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/message/types.hpp>

 #ifdef FEATURE_SENSORS_CACHE

 extern ipmi::sensor::SensorCacheMap sensorCacheMap;

 // The signal's message type is 0x04 from DBus spec:
 // https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
 static constexpr auto msgTypeSignal = 0x04;

 #endif

 namespace ipmi
 {
 namespace sensor
 {

 using Assertion = uint16_t;
 using Deassertion = uint16_t;
 using AssertionSet = std::pair<Assertion, Deassertion>;

 using Service = std::string;
 using Path = std::string;
 using Interface = std::string;

 using ServicePath = std::pair<Path, Service>;

 using Interfaces = std::vector<Interface>;

 using MapperResponseType = std::map<Path, std::map<Service, Interfaces>>;
 using namespace phosphor::logging;

 /** @brief get the D-Bus service and service path
  *  @param[in] bus - The Dbus bus object
  *  @param[in] interface - interface to the service
  *  @param[in] path - interested path in the list of objects
  *  @return pair of service path and service
  */
 ServicePath getServiceAndPath(sdbusplus::bus::bus& bus,
                               const std::string& interface,
                               const std::string& path = std::string());

 /** @brief Make assertion set from input data
  *  @param[in] cmdData - Input sensor data
  *  @return pair of assertion and deassertion set
  */
 AssertionSet getAssertionSet(const SetSensorReadingReq& cmdData);

 /** @brief send the message to DBus
  *  @param[in] msg - message to send
  *  @return failure status in IPMI error code
  */
 ipmi_ret_t updateToDbus(IpmiUpdateData& msg);

 namespace get
 {

 /** @brief Populate sensor name from the D-Bus property associated with the
  *         sensor. In the example entry from the yaml, the name of the D-bus
  *         property "AttemptsLeft" is the sensor name.
  *
  *         0x07:
  *            sensorType: 195
  *            path: /xyz/openbmc_project/state/host0
  *            sensorReadingType: 0x6F
  *            serviceInterface: org.freedesktop.DBus.Properties
  *            readingType: readingAssertion
  *            sensorNamePattern: nameProperty
  *            interfaces:
  *              xyz.openbmc_project.Control.Boot.RebootAttempts:
  *                AttemptsLeft:
  *                    Offsets:
  *                        0xFF:
  *                          type: uint32_t
  *
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return On success return the sensor name for the sensor.
  */
 inline SensorName nameProperty(const Info& sensorInfo)
 {
     return sensorInfo.propertyInterfaces.begin()->second.begin()->first;
 }

 /** @brief Populate sensor name from the D-Bus object associated with the
  *         sensor. If the object path is /system/chassis/motherboard/dimm0 then
  *         the leaf dimm0 is considered as the sensor name.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return On success return the sensor name for the sensor.
  */
 inline SensorName nameLeaf(const Info& sensorInfo)
 {
     return sensorInfo.sensorPath.substr(
         sensorInfo.sensorPath.find_last_of('/') + 1,
         sensorInfo.sensorPath.length());
 }

 /** @brief Populate sensor name from the D-Bus object associated with the
  *         sensor and the property.
  *         If the object path is /xyz/openbmc_project/inventory/Fan0 and
  *         the property is Present, the leaf Fan0 and the Property is
  *         joined to Fan0_Present as the sensor name.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return On success return the sensor name for the sensor.
  */
 inline SensorName nameLeafProperty(const Info& sensorInfo)
 {
     return nameLeaf(sensorInfo) + "_" + nameProperty(sensorInfo);
 }

 /** @brief Populate sensor name from the D-Bus object associated with the
  *         sensor. If the object path is /system/chassis/motherboard/cpu0/core0
  *         then the sensor name is cpu0_core0. The leaf and the parent is put
  *         together to get the sensor name.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return On success return the sensor name for the sensor.
  */
 SensorName nameParentLeaf(const Info& sensorInfo);

 /**
  *  @brief Helper function to map the dbus info to sensor's assertion status
  *         for the get sensor reading command.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *  @param[in] path - Dbus object path.
  *  @param[in] interface - Dbus interface.
  *
  *  @return Response for get sensor reading command.
  */
 GetSensorResponse mapDbusToAssertion(const Info& sensorInfo,
                                      const InstancePath& path,
                                      const DbusInterface& interface);

 #ifndef FEATURE_SENSORS_CACHE
 /**
  *  @brief Map the Dbus info to sensor's assertion status in the Get sensor
  *         reading command response.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return Response for get sensor reading command.
  */
 GetSensorResponse assertion(const Info& sensorInfo);

 /**
  *  @brief Maps the Dbus info to the reading field in the Get sensor reading
  *         command response.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return Response for get sensor reading command.
  */
 GetSensorResponse eventdata2(const Info& sensorInfo);

 /**
  *  @brief readingAssertion is a case where the entire assertion state field
  *         serves as the sensor value.
  *
  *  @tparam T - type of the dbus property related to sensor.
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return Response for get sensor reading command.
  */
 template <typename T>
 GetSensorResponse readingAssertion(const Info& sensorInfo)
 {
     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
     GetSensorResponse response{};

     enableScanning(&response);

     auto service = ipmi::getService(bus, sensorInfo.sensorInterface,
                                     sensorInfo.sensorPath);

     auto propValue = ipmi::getDbusProperty(
         bus, service, sensorInfo.sensorPath,
         sensorInfo.propertyInterfaces.begin()->first,
         sensorInfo.propertyInterfaces.begin()->second.begin()->first);

     setAssertionBytes(static_cast<uint16_t>(std::get<T>(propValue)), &response);

     return response;
 }

 /** @brief Map the Dbus info to the reading field in the Get sensor reading
  *         command response
  *
  *  @tparam T - type of the dbus property related to sensor.
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return Response for get sensor reading command.
  */
 template <typename T>
 GetSensorResponse readingData(const Info& sensorInfo)
 {
     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};

     GetSensorResponse response{};

     enableScanning(&response);

     auto service = ipmi::getService(bus, sensorInfo.sensorInterface,
                                     sensorInfo.sensorPath);

 #ifdef UPDATE_FUNCTIONAL_ON_FAIL
     // Check the OperationalStatus interface for functional property
     if (sensorInfo.propertyInterfaces.begin()->first ==
         "xyz.openbmc_project.Sensor.Value")
     {
         bool functional = true;
         try
         {
             auto funcValue = ipmi::getDbusProperty(
                 bus, service, sensorInfo.sensorPath,
                 "xyz.openbmc_project.State.Decorator.OperationalStatus",
                 "Functional");
             functional = std::get<bool>(funcValue);
         }
         catch (...)
         {
             // No-op if Functional property could not be found since this
             // check is only valid for Sensor.Value read for hwmonio
         }
         if (!functional)
         {
             throw SensorFunctionalError();
         }
     }
 #endif

     auto propValue = ipmi::getDbusProperty(
         bus, service, sensorInfo.sensorPath,
         sensorInfo.propertyInterfaces.begin()->first,
         sensorInfo.propertyInterfaces.begin()->second.begin()->first);

     double value = std::get<T>(propValue) *
                    std::pow(10, sensorInfo.scale - sensorInfo.exponentR);
     int32_t rawData =
         (value - sensorInfo.scaledOffset) / sensorInfo.coefficientM;

     constexpr uint8_t sensorUnitsSignedBits = 2 << 6;
     constexpr uint8_t signedDataFormat = 0x80;
     // if sensorUnits1 [7:6] = 10b, sensor is signed
     if ((sensorInfo.sensorUnits1 & sensorUnitsSignedBits) == signedDataFormat)
     {
         if (rawData > std::numeric_limits<int8_t>::max() ||
             rawData < std::numeric_limits<int8_t>::lowest())
         {
             log<level::ERR>("Value out of range");
             throw std::out_of_range("Value out of range");
         }
         setReading(static_cast<int8_t>(rawData), &response);
     }
     else
     {
         if (rawData > std::numeric_limits<uint8_t>::max() ||
             rawData < std::numeric_limits<uint8_t>::lowest())
         {
             log<level::ERR>("Value out of range");
             throw std::out_of_range("Value out of range");
         }
         setReading(static_cast<uint8_t>(rawData), &response);
     }

     if (!std::isfinite(value))
     {
         response.readingOrStateUnavailable = 1;
     }

     bool critAlarmHigh;
     try
     {
         critAlarmHigh = std::get<bool>(ipmi::getDbusProperty(
             bus, service, sensorInfo.sensorPath,
             "xyz.openbmc_project.Sensor.Threshold.Critical",
             "CriticalAlarmHigh"));
     }
     catch (const std::exception& e)
     {
         critAlarmHigh = false;
     }
     bool critAlarmLow;
     try
     {
         critAlarmLow = std::get<bool>(ipmi::getDbusProperty(
             bus, service, sensorInfo.sensorPath,
             "xyz.openbmc_project.Sensor.Threshold.Critical",
             "CriticalAlarmLow"));
     }
     catch (const std::exception& e)
     {
         critAlarmLow = false;
     }
     bool warningAlarmHigh;
     try
     {
         warningAlarmHigh = std::get<bool>(ipmi::getDbusProperty(
             bus, service, sensorInfo.sensorPath,
             "xyz.openbmc_project.Sensor.Threshold.Warning",
             "WarningAlarmHigh"));
     }
     catch (const std::exception& e)
     {
         warningAlarmHigh = false;
     }
     bool warningAlarmLow;
     try
     {
         warningAlarmLow = std::get<bool>(ipmi::getDbusProperty(
             bus, service, sensorInfo.sensorPath,
             "xyz.openbmc_project.Sensor.Threshold.Warning", "WarningAlarmlow"));
     }
     catch (const std::exception& e)
     {
         warningAlarmLow = false;
     }
     response.thresholdLevelsStates =
         (static_cast<uint8_t>(critAlarmHigh) << 4) |
         (static_cast<uint8_t>(warningAlarmHigh) << 3) |
         (static_cast<uint8_t>(warningAlarmLow) << 2) |
         (static_cast<uint8_t>(critAlarmLow) << 1);

     return response;
 }

 #else

 /**
  *  @brief Map the Dbus info to sensor's assertion status in the Get sensor
  *         reading command response.
  *
  *  @param[in] id - The sensor id
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *  @param[in] msg - Dbus message from match callback.
  *
  *  @return Response for get sensor reading command.
  */
 std::optional<GetSensorResponse> assertion(uint8_t id, const Info& sensorInfo,
                                            sdbusplus::message::message& msg);

 /**
  *  @brief Maps the Dbus info to the reading field in the Get sensor reading
  *         command response.
  *
  *  @param[in] id - The sensor id
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *  @param[in] msg - Dbus message from match callback.
  *
  *  @return Response for get sensor reading command.
  */
 std::optional<GetSensorResponse> eventdata2(uint8_t id, const Info& sensorInfo,
                                             sdbusplus::message::message& msg);

 /**
  *  @brief readingAssertion is a case where the entire assertion state field
  *         serves as the sensor value.
  *
  *  @tparam T - type of the dbus property related to sensor.
  *  @param[in] id - The sensor id
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *  @param[in] msg - Dbus message from match callback.
  *
  *  @return Response for get sensor reading command.
  */
 template <typename T>
 std::optional<GetSensorResponse>
     readingAssertion(uint8_t id, const Info& sensorInfo,
                      sdbusplus::message::message& msg)
 {
     // TODO
     return {};
 }

 /** @brief Get sensor reading from the dbus message from match
  *
  *  @tparam T - type of the dbus property related to sensor.
  *  @param[in] id - The sensor id
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *  @param[in] msg - Dbus message from match callback.
  *
  *  @return Response for get sensor reading command.
  */
 template <typename T>
 std::optional<GetSensorResponse> readingData(uint8_t id, const Info& sensorInfo,
                                              sdbusplus::message::message& msg)
 {
     std::map<std::string, ipmi::Value> properties;
     auto type = msg.get_type();
     if (type == msgTypeSignal)
     {
         // This is signal callback
         std::string interfaceName;
         msg.read(interfaceName);

         if (interfaceName ==
             "xyz.openbmc_project.State.Decorator.OperationalStatus")
         {
             msg.read(properties);
             auto val = properties.find("Functional");
             if (val != properties.end())
             {
                 sensorCacheMap[id]->functional = std::get<bool>(val->second);
             }
             return {};
         }
         if (interfaceName == "xyz.openbmc_project.State.Decorator.Availability")
         {
             msg.read(properties);
             auto val = properties.find("Available");
             if (val != properties.end())
             {
                 sensorCacheMap[id]->available = std::get<bool>(val->second);
             }
             return {};
         }

         if (interfaceName != sensorInfo.sensorInterface)
         {
             // Not the interface we need
             return {};
         }

 #ifdef UPDATE_FUNCTIONAL_ON_FAIL
         if (sensorCacheMap[id])
         {
             if (!sensorCacheMap[id]->functional)
             {
                 throw SensorFunctionalError();
             }
         }
 #endif
     }
     // Now the message only contains the properties.

     GetSensorResponse response{};

     enableScanning(&response);

     msg.read(properties);

     auto iter = properties.find(
         sensorInfo.propertyInterfaces.begin()->second.begin()->first);
     if (iter == properties.end())
     {
         return {};
     }

     double value = std::get<T>(iter->second) *
                    std::pow(10, sensorInfo.scale - sensorInfo.exponentR);
     int32_t rawData =
         (value - sensorInfo.scaledOffset) / sensorInfo.coefficientM;

     constexpr uint8_t sensorUnitsSignedBits = 2 << 6;
     constexpr uint8_t signedDataFormat = 0x80;
     // if sensorUnits1 [7:6] = 10b, sensor is signed
     if ((sensorInfo.sensorUnits1 & sensorUnitsSignedBits) == signedDataFormat)
     {
         if (rawData > std::numeric_limits<int8_t>::max() ||
             rawData < std::numeric_limits<int8_t>::lowest())
         {
             log<level::ERR>("Value out of range");
             throw std::out_of_range("Value out of range");
         }
         setReading(static_cast<int8_t>(rawData), &response);
     }
     else
     {
         if (rawData > std::numeric_limits<uint8_t>::max() ||
             rawData < std::numeric_limits<uint8_t>::lowest())
         {
             log<level::ERR>("Value out of range");
             throw std::out_of_range("Value out of range");
         }
         setReading(static_cast<uint8_t>(rawData), &response);
     }

     if (!std::isfinite(value))
     {
         response.readingOrStateUnavailable = 1;
     }

     if (!sensorCacheMap[id].has_value())
     {
         sensorCacheMap[id] = SensorData{};
     }
     sensorCacheMap[id]->response = response;

     return response;
 }

 #endif // FEATURE_SENSORS_CACHE

 } // namespace get

 namespace set
 {

 /** @brief Make a DBus message for a Dbus call
  *  @param[in] updateInterface - Interface name
  *  @param[in] sensorPath - Path of the sensor
  *  @param[in] command - command to be executed
  *  @param[in] sensorInterface - DBus interface of sensor
  *  @return a dbus message
  */
 IpmiUpdateData makeDbusMsg(const std::string& updateInterface,
                            const std::string& sensorPath,
                            const std::string& command,
                            const std::string& sensorInterface);

 /** @brief Update d-bus based on assertion type sensor data
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 ipmi_ret_t assertion(const SetSensorReadingReq& cmdData,
                      const Info& sensorInfo);

 /** @brief Update d-bus based on a reading assertion
  *  @tparam T - type of d-bus property mapping this sensor
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 template <typename T>
 ipmi_ret_t readingAssertion(const SetSensorReadingReq& cmdData,
                             const Info& sensorInfo)
 {
     auto msg =
         makeDbusMsg("org.freedesktop.DBus.Properties", sensorInfo.sensorPath,
                     "Set", sensorInfo.sensorInterface);

     const auto& interface = sensorInfo.propertyInterfaces.begin();
     msg.append(interface->first);
     for (const auto& property : interface->second)
     {
         msg.append(property.first);
         std::variant<T> value = static_cast<T>((cmdData.assertOffset8_14 << 8) |
                                                cmdData.assertOffset0_7);
         msg.append(value);
     }
     return updateToDbus(msg);
 }

 /** @brief Update d-bus based on a discrete reading
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return an IPMI error code
  */
 template <typename T>
 ipmi_ret_t readingData(const SetSensorReadingReq& cmdData,
                        const Info& sensorInfo)
 {
     T raw_value =
         (sensorInfo.coefficientM * cmdData.reading) + sensorInfo.scaledOffset;

     raw_value *= std::pow(10, sensorInfo.exponentR - sensorInfo.scale);

     auto msg =
         makeDbusMsg("org.freedesktop.DBus.Properties", sensorInfo.sensorPath,
                     "Set", sensorInfo.sensorInterface);

     const auto& interface = sensorInfo.propertyInterfaces.begin();
     msg.append(interface->first);

     for (const auto& property : interface->second)
     {
         msg.append(property.first);
         std::variant<T> value = raw_value;
         msg.append(value);
     }
     return updateToDbus(msg);
 }

 /** @brief Update d-bus based on eventdata type sensor data
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 ipmi_ret_t eventdata(const SetSensorReadingReq& cmdData, const Info& sensorInfo,
                      uint8_t data);

 /** @brief Update d-bus based on eventdata1 type sensor data
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 inline ipmi_ret_t eventdata1(const SetSensorReadingReq& cmdData,
                              const Info& sensorInfo)
 {
     return eventdata(cmdData, sensorInfo, cmdData.eventData1);
 }

 /** @brief Update d-bus based on eventdata2 type sensor data
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 inline ipmi_ret_t eventdata2(const SetSensorReadingReq& cmdData,
                              const Info& sensorInfo)
 {
     return eventdata(cmdData, sensorInfo, cmdData.eventData2);
 }

 /** @brief Update d-bus based on eventdata3 type sensor data
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 inline ipmi_ret_t eventdata3(const SetSensorReadingReq& cmdData,
                              const Info& sensorInfo)
 {
     return eventdata(cmdData, sensorInfo, cmdData.eventData3);
 }

 } // namespace set

 namespace notify
 {

 /** @brief Make a DBus message for a Dbus call
  *  @param[in] updateInterface - Interface name
  *  @param[in] sensorPath - Path of the sensor
  *  @param[in] command - command to be executed
  *  @param[in] sensorInterface - DBus interface of sensor
  *  @return a dbus message
  */
 IpmiUpdateData makeDbusMsg(const std::string& updateInterface,
                            const std::string& sensorPath,
                            const std::string& command,
                            const std::string& sensorInterface);

 /** @brief Update d-bus based on assertion type sensor data
  *  @param[in] interfaceMap - sensor interface
  *  @param[in] cmdData - input sensor data
  *  @param[in] sensorInfo - sensor d-bus info
  *  @return a IPMI error code
  */
 ipmi_ret_t assertion(const SetSensorReadingReq& cmdData,
                      const Info& sensorInfo);

 } // namespace notify

 namespace inventory
 {

 namespace get
 {

 /**
  *  @brief Map the Dbus info to sensor's assertion status in the Get sensor
  *         reading command response.
  *
  *  @param[in] sensorInfo - Dbus info related to sensor.
  *
  *  @return Response for get sensor reading command.
  */
 GetSensorResponse assertion(const Info& sensorInfo);

 } // namespace get

 } // namespace inventory
 } // namespace sensor
 } // namespace ipmi
	#pragma once

	#include "config.h"

	#include "sensorhandler.hpp"

	#include <cmath>
	#include <ipmid/api.hpp>
	#include <ipmid/types.hpp>
	#include <ipmid/utils.hpp>
	#include <phosphor-logging/elog-errors.hpp>
	#include <phosphor-logging/log.hpp>
	#include <sdbusplus/message/types.hpp>

	#ifdef FEATURE_SENSORS_CACHE

	extern ipmi::sensor::SensorCacheMap sensorCacheMap;

	// The signal's message type is 0x04 from DBus spec:
	// https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-messages
	static constexpr auto msgTypeSignal = 0x04;

	#endif

	namespace ipmi
	{
	namespace sensor
	{

	using Assertion = uint16_t;
	using Deassertion = uint16_t;
	using AssertionSet = std::pair<Assertion, Deassertion>;

	using Service = std::string;
	using Path = std::string;
	using Interface = std::string;

	using ServicePath = std::pair<Path, Service>;

	using Interfaces = std::vector<Interface>;

	using MapperResponseType = std::map<Path, std::map<Service, Interfaces>>;
	using namespace phosphor::logging;

	/** @brief get the D-Bus service and service path
	* @param[in] bus - The Dbus bus object
	* @param[in] interface - interface to the service
	* @param[in] path - interested path in the list of objects
	* @return pair of service path and service
	*/
	ServicePath getServiceAndPath(sdbusplus::bus::bus& bus,
	const std::string& interface,
	const std::string& path = std::string());

	/** @brief Make assertion set from input data
	* @param[in] cmdData - Input sensor data
	* @return pair of assertion and deassertion set
	*/
	AssertionSet getAssertionSet(const SetSensorReadingReq& cmdData);

	/** @brief send the message to DBus
	* @param[in] msg - message to send
	* @return failure status in IPMI error code
	*/
	ipmi_ret_t updateToDbus(IpmiUpdateData& msg);

	namespace get
	{

	/** @brief Populate sensor name from the D-Bus property associated with the
	* sensor. In the example entry from the yaml, the name of the D-bus
	* property "AttemptsLeft" is the sensor name.
	*
	* 0x07:
	* sensorType: 195
	* path: /xyz/openbmc_project/state/host0
	* sensorReadingType: 0x6F
	* serviceInterface: org.freedesktop.DBus.Properties
	* readingType: readingAssertion
	* sensorNamePattern: nameProperty
	* interfaces:
	* xyz.openbmc_project.Control.Boot.RebootAttempts:
	* AttemptsLeft:
	* Offsets:
	* 0xFF:
	* type: uint32_t
	*
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return On success return the sensor name for the sensor.
	*/
	inline SensorName nameProperty(const Info& sensorInfo)
	{
	return sensorInfo.propertyInterfaces.begin()->second.begin()->first;
	}

	/** @brief Populate sensor name from the D-Bus object associated with the
	* sensor. If the object path is /system/chassis/motherboard/dimm0 then
	* the leaf dimm0 is considered as the sensor name.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return On success return the sensor name for the sensor.
	*/
	inline SensorName nameLeaf(const Info& sensorInfo)
	{
	return sensorInfo.sensorPath.substr(
	sensorInfo.sensorPath.find_last_of('/') + 1,
	sensorInfo.sensorPath.length());
	}

	/** @brief Populate sensor name from the D-Bus object associated with the
	* sensor and the property.
	* If the object path is /xyz/openbmc_project/inventory/Fan0 and
	* the property is Present, the leaf Fan0 and the Property is
	* joined to Fan0_Present as the sensor name.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return On success return the sensor name for the sensor.
	*/
	inline SensorName nameLeafProperty(const Info& sensorInfo)
	{
	return nameLeaf(sensorInfo) + "_" + nameProperty(sensorInfo);
	}

	/** @brief Populate sensor name from the D-Bus object associated with the
	* sensor. If the object path is /system/chassis/motherboard/cpu0/core0
	* then the sensor name is cpu0_core0. The leaf and the parent is put
	* together to get the sensor name.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return On success return the sensor name for the sensor.
	*/
	SensorName nameParentLeaf(const Info& sensorInfo);

	/**
	* @brief Helper function to map the dbus info to sensor's assertion status
	* for the get sensor reading command.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	* @param[in] path - Dbus object path.
	* @param[in] interface - Dbus interface.
	*
	* @return Response for get sensor reading command.
	*/
	GetSensorResponse mapDbusToAssertion(const Info& sensorInfo,
	const InstancePath& path,
	const DbusInterface& interface);

	#ifndef FEATURE_SENSORS_CACHE
	/**
	* @brief Map the Dbus info to sensor's assertion status in the Get sensor
	* reading command response.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return Response for get sensor reading command.
	*/
	GetSensorResponse assertion(const Info& sensorInfo);

	/**
	* @brief Maps the Dbus info to the reading field in the Get sensor reading
	* command response.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return Response for get sensor reading command.
	*/
	GetSensorResponse eventdata2(const Info& sensorInfo);

	/**
	* @brief readingAssertion is a case where the entire assertion state field
	* serves as the sensor value.
	*
	* @tparam T - type of the dbus property related to sensor.
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return Response for get sensor reading command.
	*/
	template <typename T>
	GetSensorResponse readingAssertion(const Info& sensorInfo)
	{
	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
	GetSensorResponse response{};

	enableScanning(&response);

	auto service = ipmi::getService(bus, sensorInfo.sensorInterface,
	sensorInfo.sensorPath);

	auto propValue = ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	sensorInfo.propertyInterfaces.begin()->first,
	sensorInfo.propertyInterfaces.begin()->second.begin()->first);

	setAssertionBytes(static_cast<uint16_t>(std::get<T>(propValue)), &response);

	return response;
	}

	/** @brief Map the Dbus info to the reading field in the Get sensor reading
	* command response
	*
	* @tparam T - type of the dbus property related to sensor.
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return Response for get sensor reading command.
	*/
	template <typename T>
	GetSensorResponse readingData(const Info& sensorInfo)
	{
	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};

	GetSensorResponse response{};

	enableScanning(&response);

	auto service = ipmi::getService(bus, sensorInfo.sensorInterface,
	sensorInfo.sensorPath);

	#ifdef UPDATE_FUNCTIONAL_ON_FAIL
	// Check the OperationalStatus interface for functional property
	if (sensorInfo.propertyInterfaces.begin()->first ==
	"xyz.openbmc_project.Sensor.Value")
	{
	bool functional = true;
	try
	{
	auto funcValue = ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	"xyz.openbmc_project.State.Decorator.OperationalStatus",
	"Functional");
	functional = std::get<bool>(funcValue);
	}
	catch (...)
	{
	// No-op if Functional property could not be found since this
	// check is only valid for Sensor.Value read for hwmonio
	}
	if (!functional)
	{
	throw SensorFunctionalError();
	}
	}
	#endif

	auto propValue = ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	sensorInfo.propertyInterfaces.begin()->first,
	sensorInfo.propertyInterfaces.begin()->second.begin()->first);

	double value = std::get<T>(propValue) *
	std::pow(10, sensorInfo.scale - sensorInfo.exponentR);
	int32_t rawData =
	(value - sensorInfo.scaledOffset) / sensorInfo.coefficientM;

	constexpr uint8_t sensorUnitsSignedBits = 2 << 6;
	constexpr uint8_t signedDataFormat = 0x80;
	// if sensorUnits1 [7:6] = 10b, sensor is signed
	if ((sensorInfo.sensorUnits1 & sensorUnitsSignedBits) == signedDataFormat)
	{
	if (rawData > std::numeric_limits<int8_t>::max() \|\|
	rawData < std::numeric_limits<int8_t>::lowest())
	{
	log<level::ERR>("Value out of range");
	throw std::out_of_range("Value out of range");
	}
	setReading(static_cast<int8_t>(rawData), &response);
	}
	else
	{
	if (rawData > std::numeric_limits<uint8_t>::max() \|\|
	rawData < std::numeric_limits<uint8_t>::lowest())
	{
	log<level::ERR>("Value out of range");
	throw std::out_of_range("Value out of range");
	}
	setReading(static_cast<uint8_t>(rawData), &response);
	}

	if (!std::isfinite(value))
	{
	response.readingOrStateUnavailable = 1;
	}

	bool critAlarmHigh;
	try
	{
	critAlarmHigh = std::get<bool>(ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	"xyz.openbmc_project.Sensor.Threshold.Critical",
	"CriticalAlarmHigh"));
	}
	catch (const std::exception& e)
	{
	critAlarmHigh = false;
	}
	bool critAlarmLow;
	try
	{
	critAlarmLow = std::get<bool>(ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	"xyz.openbmc_project.Sensor.Threshold.Critical",
	"CriticalAlarmLow"));
	}
	catch (const std::exception& e)
	{
	critAlarmLow = false;
	}
	bool warningAlarmHigh;
	try
	{
	warningAlarmHigh = std::get<bool>(ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	"xyz.openbmc_project.Sensor.Threshold.Warning",
	"WarningAlarmHigh"));
	}
	catch (const std::exception& e)
	{
	warningAlarmHigh = false;
	}
	bool warningAlarmLow;
	try
	{
	warningAlarmLow = std::get<bool>(ipmi::getDbusProperty(
	bus, service, sensorInfo.sensorPath,
	"xyz.openbmc_project.Sensor.Threshold.Warning", "WarningAlarmlow"));
	}
	catch (const std::exception& e)
	{
	warningAlarmLow = false;
	}
	response.thresholdLevelsStates =
	(static_cast<uint8_t>(critAlarmHigh) << 4) \|
	(static_cast<uint8_t>(warningAlarmHigh) << 3) \|
	(static_cast<uint8_t>(warningAlarmLow) << 2) \|
	(static_cast<uint8_t>(critAlarmLow) << 1);

	return response;
	}

	#else

	/**
	* @brief Map the Dbus info to sensor's assertion status in the Get sensor
	* reading command response.
	*
	* @param[in] id - The sensor id
	* @param[in] sensorInfo - Dbus info related to sensor.
	* @param[in] msg - Dbus message from match callback.
	*
	* @return Response for get sensor reading command.
	*/
	std::optional<GetSensorResponse> assertion(uint8_t id, const Info& sensorInfo,
	sdbusplus::message::message& msg);

	/**
	* @brief Maps the Dbus info to the reading field in the Get sensor reading
	* command response.
	*
	* @param[in] id - The sensor id
	* @param[in] sensorInfo - Dbus info related to sensor.
	* @param[in] msg - Dbus message from match callback.
	*
	* @return Response for get sensor reading command.
	*/
	std::optional<GetSensorResponse> eventdata2(uint8_t id, const Info& sensorInfo,
	sdbusplus::message::message& msg);

	/**
	* @brief readingAssertion is a case where the entire assertion state field
	* serves as the sensor value.
	*
	* @tparam T - type of the dbus property related to sensor.
	* @param[in] id - The sensor id
	* @param[in] sensorInfo - Dbus info related to sensor.
	* @param[in] msg - Dbus message from match callback.
	*
	* @return Response for get sensor reading command.
	*/
	template <typename T>
	std::optional<GetSensorResponse>
	readingAssertion(uint8_t id, const Info& sensorInfo,
	sdbusplus::message::message& msg)
	{
	// TODO
	return {};
	}

	/** @brief Get sensor reading from the dbus message from match
	*
	* @tparam T - type of the dbus property related to sensor.
	* @param[in] id - The sensor id
	* @param[in] sensorInfo - Dbus info related to sensor.
	* @param[in] msg - Dbus message from match callback.
	*
	* @return Response for get sensor reading command.
	*/
	template <typename T>
	std::optional<GetSensorResponse> readingData(uint8_t id, const Info& sensorInfo,
	sdbusplus::message::message& msg)
	{
	std::map<std::string, ipmi::Value> properties;
	auto type = msg.get_type();
	if (type == msgTypeSignal)
	{
	// This is signal callback
	std::string interfaceName;
	msg.read(interfaceName);

	if (interfaceName ==
	"xyz.openbmc_project.State.Decorator.OperationalStatus")
	{
	msg.read(properties);
	auto val = properties.find("Functional");
	if (val != properties.end())
	{
	sensorCacheMap[id]->functional = std::get<bool>(val->second);
	}
	return {};
	}
	if (interfaceName == "xyz.openbmc_project.State.Decorator.Availability")
	{
	msg.read(properties);
	auto val = properties.find("Available");
	if (val != properties.end())
	{
	sensorCacheMap[id]->available = std::get<bool>(val->second);
	}
	return {};
	}

	if (interfaceName != sensorInfo.sensorInterface)
	{
	// Not the interface we need
	return {};
	}

	#ifdef UPDATE_FUNCTIONAL_ON_FAIL
	if (sensorCacheMap[id])
	{
	if (!sensorCacheMap[id]->functional)
	{
	throw SensorFunctionalError();
	}
	}
	#endif
	}
	// Now the message only contains the properties.

	GetSensorResponse response{};

	enableScanning(&response);

	msg.read(properties);

	auto iter = properties.find(
	sensorInfo.propertyInterfaces.begin()->second.begin()->first);
	if (iter == properties.end())
	{
	return {};
	}

	double value = std::get<T>(iter->second) *
	std::pow(10, sensorInfo.scale - sensorInfo.exponentR);
	int32_t rawData =
	(value - sensorInfo.scaledOffset) / sensorInfo.coefficientM;

	constexpr uint8_t sensorUnitsSignedBits = 2 << 6;
	constexpr uint8_t signedDataFormat = 0x80;
	// if sensorUnits1 [7:6] = 10b, sensor is signed
	if ((sensorInfo.sensorUnits1 & sensorUnitsSignedBits) == signedDataFormat)
	{
	if (rawData > std::numeric_limits<int8_t>::max() \|\|
	rawData < std::numeric_limits<int8_t>::lowest())
	{
	log<level::ERR>("Value out of range");
	throw std::out_of_range("Value out of range");
	}
	setReading(static_cast<int8_t>(rawData), &response);
	}
	else
	{
	if (rawData > std::numeric_limits<uint8_t>::max() \|\|
	rawData < std::numeric_limits<uint8_t>::lowest())
	{
	log<level::ERR>("Value out of range");
	throw std::out_of_range("Value out of range");
	}
	setReading(static_cast<uint8_t>(rawData), &response);
	}

	if (!std::isfinite(value))
	{
	response.readingOrStateUnavailable = 1;
	}

	if (!sensorCacheMap[id].has_value())
	{
	sensorCacheMap[id] = SensorData{};
	}
	sensorCacheMap[id]->response = response;

	return response;
	}

	#endif // FEATURE_SENSORS_CACHE

	} // namespace get

	namespace set
	{

	/** @brief Make a DBus message for a Dbus call
	* @param[in] updateInterface - Interface name
	* @param[in] sensorPath - Path of the sensor
	* @param[in] command - command to be executed
	* @param[in] sensorInterface - DBus interface of sensor
	* @return a dbus message
	*/
	IpmiUpdateData makeDbusMsg(const std::string& updateInterface,
	const std::string& sensorPath,
	const std::string& command,
	const std::string& sensorInterface);

	/** @brief Update d-bus based on assertion type sensor data
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	ipmi_ret_t assertion(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo);

	/** @brief Update d-bus based on a reading assertion
	* @tparam T - type of d-bus property mapping this sensor
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	template <typename T>
	ipmi_ret_t readingAssertion(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo)
	{
	auto msg =
	makeDbusMsg("org.freedesktop.DBus.Properties", sensorInfo.sensorPath,
	"Set", sensorInfo.sensorInterface);

	const auto& interface = sensorInfo.propertyInterfaces.begin();
	msg.append(interface->first);
	for (const auto& property : interface->second)
	{
	msg.append(property.first);
	std::variant<T> value = static_cast<T>((cmdData.assertOffset8_14 << 8) \|
	cmdData.assertOffset0_7);
	msg.append(value);
	}
	return updateToDbus(msg);
	}

	/** @brief Update d-bus based on a discrete reading
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return an IPMI error code
	*/
	template <typename T>
	ipmi_ret_t readingData(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo)
	{
	T raw_value =
	(sensorInfo.coefficientM * cmdData.reading) + sensorInfo.scaledOffset;

	raw_value *= std::pow(10, sensorInfo.exponentR - sensorInfo.scale);

	auto msg =
	makeDbusMsg("org.freedesktop.DBus.Properties", sensorInfo.sensorPath,
	"Set", sensorInfo.sensorInterface);

	const auto& interface = sensorInfo.propertyInterfaces.begin();
	msg.append(interface->first);

	for (const auto& property : interface->second)
	{
	msg.append(property.first);
	std::variant<T> value = raw_value;
	msg.append(value);
	}
	return updateToDbus(msg);
	}

	/** @brief Update d-bus based on eventdata type sensor data
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	ipmi_ret_t eventdata(const SetSensorReadingReq& cmdData, const Info& sensorInfo,
	uint8_t data);

	/** @brief Update d-bus based on eventdata1 type sensor data
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	inline ipmi_ret_t eventdata1(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo)
	{
	return eventdata(cmdData, sensorInfo, cmdData.eventData1);
	}

	/** @brief Update d-bus based on eventdata2 type sensor data
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	inline ipmi_ret_t eventdata2(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo)
	{
	return eventdata(cmdData, sensorInfo, cmdData.eventData2);
	}

	/** @brief Update d-bus based on eventdata3 type sensor data
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	inline ipmi_ret_t eventdata3(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo)
	{
	return eventdata(cmdData, sensorInfo, cmdData.eventData3);
	}

	} // namespace set

	namespace notify
	{

	/** @brief Make a DBus message for a Dbus call
	* @param[in] updateInterface - Interface name
	* @param[in] sensorPath - Path of the sensor
	* @param[in] command - command to be executed
	* @param[in] sensorInterface - DBus interface of sensor
	* @return a dbus message
	*/
	IpmiUpdateData makeDbusMsg(const std::string& updateInterface,
	const std::string& sensorPath,
	const std::string& command,
	const std::string& sensorInterface);

	/** @brief Update d-bus based on assertion type sensor data
	* @param[in] interfaceMap - sensor interface
	* @param[in] cmdData - input sensor data
	* @param[in] sensorInfo - sensor d-bus info
	* @return a IPMI error code
	*/
	ipmi_ret_t assertion(const SetSensorReadingReq& cmdData,
	const Info& sensorInfo);

	} // namespace notify

	namespace inventory
	{

	namespace get
	{

	/**
	* @brief Map the Dbus info to sensor's assertion status in the Get sensor
	* reading command response.
	*
	* @param[in] sensorInfo - Dbus info related to sensor.
	*
	* @return Response for get sensor reading command.
	*/
	GetSensorResponse assertion(const Info& sensorInfo);

	} // namespace get

	} // namespace inventory
	} // namespace sensor
	} // namespace ipmi