libpldmresponder/bios_parser.cpp - openbmc/pldm - Gitiles

 #include "bios_parser.hpp"

 #include "libpldmresponder/utils.hpp"

 #include <filesystem>
 #include <fstream>
 #include <nlohmann/json.hpp>
 #include <optional>
 #include <phosphor-logging/log.hpp>

 namespace bios_parser
 {

 using Json = nlohmann::json;
 namespace fs = std::filesystem;
 using namespace phosphor::logging;

 const std::vector<Json> emptyJsonList{};
 const Json emptyJson{};

 struct DBusMapping
 {
     std::string objectPath;   //!< D-Bus object path
     std::string interface;    //!< D-Bus interface
     std::string propertyName; //!< D-Bus property name
 };

 using AttrName = std::string;
 using BIOSJsonName = std::string;
 using AttrLookup = std::map<AttrName, std::optional<DBusMapping>>;
 using BIOSStringHandler =
     std::function<int(const Json& entry, Strings& strings)>;
 using AttrLookupHandler = std::function<int(const Json& entry, AttrLookup)>;
 using typeHandler = std::function<int(const Json& entry)>;

 Strings BIOSStrings;
 AttrLookup BIOSAttrLookup;

 const Strings& getStrings()
 {
     return BIOSStrings;
 }

 int parseBiosJsonFile(const fs::path& dirPath, const std::string& fileName,
                       Json& fileData)
 {
     int rc = 0;

     fs::path filePath = dirPath / fileName;

     std::ifstream jsonFile(filePath);
     if (!jsonFile.is_open())
     {
         log<level::ERR>("BIOS config file does not exist",
                         entry("FILE=%s", filePath.c_str()));
         rc = -1;
     }
     else
     {
         fileData = Json::parse(jsonFile, nullptr, false);
         if (fileData.is_discarded())
         {
             log<level::ERR>("Parsing config file failed",
                             entry("FILE=%s", filePath.c_str()));
             rc = -1;
         }
     }

     return rc;
 }

 namespace bios_enum
 {

 namespace internal
 {

 using PropertyValue =
     std::variant<bool, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t,
                  uint64_t, double, std::string>;
 using Value = std::string;

 /** @brief Map of DBus property value to attribute value
  */
 using DbusValToValMap = std::map<PropertyValue, Value>;

 /** @brief Map containing the DBus property value to attribute value map for the
  * BIOS enumeration type attributes
  */
 std::map<AttrName, DbusValToValMap> dbusValToValMaps;

 /** @brief Map containing the possible and the default values for the BIOS
  *         enumeration type attributes.
  */
 AttrValuesMap valueMap;

 /** @brief Populate the mapping between D-Bus property value and attribute value
  *         for the BIOS enumeration attribute.
  *
  *  @param[in] type - type of the D-Bus property
  *  @param[in] dBusValues - json array of D-Bus property values
  *  @param[in] pv - Possible values for the BIOS enumeration attribute
  *
  */
 DbusValToValMap populateMapping(const std::string& type, const Json& dBusValues,
                                 const PossibleValues& pv)
 {
     size_t pos = 0;
     PropertyValue value;
     DbusValToValMap valueMap;
     for (auto it = dBusValues.begin(); it != dBusValues.end(); ++it, ++pos)
     {
         if (type == "uint8_t")
         {
             value = static_cast<uint8_t>(it.value());
         }
         else if (type == "uint16_t")
         {
             value = static_cast<uint16_t>(it.value());
         }
         else if (type == "uint32_t")
         {
             value = static_cast<uint32_t>(it.value());
         }
         else if (type == "uint64_t")
         {
             value = static_cast<uint64_t>(it.value());
         }
         else if (type == "int16_t")
         {
             value = static_cast<int16_t>(it.value());
         }
         else if (type == "int32_t")
         {
             value = static_cast<int32_t>(it.value());
         }
         else if (type == "int64_t")
         {
             value = static_cast<int64_t>(it.value());
         }
         else if (type == "bool")
         {
             value = static_cast<bool>(it.value());
         }
         else if (type == "double")
         {
             value = static_cast<double>(it.value());
         }
         else if (type == "string")
         {
             value = static_cast<std::string>(it.value());
         }
         else
         {
             log<level::ERR>("Unknown D-Bus property type",
                             entry("TYPE=%s", type.c_str()));
         }

         valueMap.emplace(value, pv[pos]);
     }

     return valueMap;
 }

 } // namespace internal

 int setupBIOSStrings(const Json& entry, Strings& strings)
 {
     Json pvs = entry.value("possible_values", emptyJsonList);

     for (auto& pv : pvs)
     {
         strings.emplace_back(std::move(pv.get<std::string>()));
     }

     return 0;
 }

 int setup(const Json& entry)
 {
     PossibleValues possibleValues;
     DefaultValues defaultValues;

     std::string attrName = entry.value("attribute_name", "");
     Json pv = entry["possible_values"];
     for (auto& val : pv)
     {
         possibleValues.emplace_back(std::move(val));
     }
     Json dv = entry["default_values"];
     for (auto& val : dv)
     {
         defaultValues.emplace_back(std::move(val));
     }
     if (entry.count("dbus") != 0)
     {
         auto dbusEntry = entry.value("dbus", emptyJson);
         std::string propertyType = dbusEntry.value("property_type", "");
         Json propValues = dbusEntry["property_values"];
         internal::dbusValToValMaps.emplace(
             attrName, internal::populateMapping(propertyType, propValues,
                                                 possibleValues));
     }
     // Defaulting all the types of attributes to BIOSEnumeration
     internal::valueMap.emplace(std::move(attrName),
                                std::make_tuple(entry.count("dbus") == 0,
                                                std::move(possibleValues),
                                                std::move(defaultValues)));
     return 0;
 }

 const AttrValuesMap& getValues()
 {
     return internal::valueMap;
 }

 CurrentValues getAttrValue(const AttrName& attrName)
 {
     const auto& dBusMap = BIOSAttrLookup.at(attrName);
     CurrentValues currentValues;
     internal::PropertyValue propValue;

     if (dBusMap == std::nullopt)
     {
         const auto& valueEntry = internal::valueMap.at(attrName);
         const auto& [readOnly, possibleValues, currentValues] = valueEntry;
         return currentValues;
     }

     const auto& dbusValToValMap = internal::dbusValToValMaps.at(attrName);
     auto bus = sdbusplus::bus::new_default();
     auto service = pldm::responder::getService(bus, dBusMap.value().objectPath,
                                                dBusMap.value().interface);
     auto method =
         bus.new_method_call(service.c_str(), dBusMap.value().objectPath.c_str(),
                             "org.freedesktop.DBus.Properties", "Get");
     method.append(dBusMap->interface, dBusMap->propertyName);
     auto reply = bus.call(method);
     reply.read(propValue);

     auto iter = dbusValToValMap.find(propValue);
     if (iter != dbusValToValMap.end())
     {
         currentValues.push_back(iter->second);
     }

     return currentValues;
 }

 } // namespace bios_enum

 namespace bios_string
 {

 /** @brief BIOS string types
  */
 enum BiosStringEncoding
 {
     UNKNOWN = 0x00,
     ASCII = 0x01,
     HEX = 0x02,
     UTF_8 = 0x03,
     UTF_16LE = 0x04,
     UTF_16BE = 0x05,
     VENDOR_SPECIFIC = 0xFF
 };

 const std::map<std::string, uint8_t> strTypeMap{
     {"Unknown", UNKNOWN},
     {"ASCII", ASCII},
     {"Hex", HEX},
     {"UTF-8", UTF_8},
     {"UTF-16LE", UTF_16LE},
     {"UTF-16LE", UTF_16LE},
     {"Vendor Specific", VENDOR_SPECIFIC}};

 namespace internal
 {

 /** @brief Map containing the possible and the default values for the BIOS
  *         string type attributes.
  */
 AttrValuesMap valueMap;

 } // namespace internal

 int setup(const Json& entry)
 {

     std::string attr = entry.value("attribute_name", "");
     // Transfer string type from string to enum
     std::string strTypeTmp = entry.value("string_type", "Unknown");
     auto iter = strTypeMap.find(strTypeTmp);
     if (iter == strTypeMap.end())
     {
         log<level::ERR>(
             "Wrong string type",
             phosphor::logging::entry("STRING_TYPE=%s", strTypeTmp.c_str()),
             phosphor::logging::entry("ATTRIBUTE_NAME=%s", attr.c_str()));
         return -1;
     }
     uint8_t strType = iter->second;

     uint16_t minStrLen = entry.value("minimum_string_length", 0);
     uint16_t maxStrLen = entry.value("maximum_string_length", 0);
     if (maxStrLen - minStrLen < 0)
     {
         log<level::ERR>(
             "Maximum string length is smaller than minimum string length",
             phosphor::logging::entry("ATTRIBUTE_NAME=%s", attr.c_str()));
         return -1;
     }
     uint16_t defaultStrLen = entry.value("default_string_length", 0);
     std::string defaultStr = entry.value("default_string", "");
     if ((defaultStrLen == 0) && (defaultStr.size() > 0))
     {
         log<level::ERR>(
             "Default string length is 0, but default string is existing",
             phosphor::logging::entry("ATTRIBUTE_NAME=%s", attr.c_str()));
         return -1;
     }

     // Defaulting all the types of attributes to BIOSString
     internal::valueMap.emplace(
         std::move(attr),
         std::make_tuple(entry.count("dbus") == 0, strType, minStrLen, maxStrLen,
                         defaultStrLen, std::move(defaultStr)));

     return 0;
 }

 const AttrValuesMap& getValues()
 {
     return internal::valueMap;
 }

 std::string getAttrValue(const AttrName& attrName)
 {
     const auto& dBusMap = BIOSAttrLookup.at(attrName);
     std::variant<std::string> propValue;

     if (dBusMap == std::nullopt)
     { // return default string
         const auto& valueEntry = internal::valueMap.at(attrName);
         return std::get<DefaultStr>(valueEntry);
     }

     auto bus = sdbusplus::bus::new_default();
     auto service = pldm::responder::getService(bus, dBusMap->objectPath,
                                                dBusMap->interface);
     auto method =
         bus.new_method_call(service.c_str(), dBusMap->objectPath.c_str(),
                             "org.freedesktop.DBus.Properties", "Get");
     method.append(dBusMap->interface, dBusMap->propertyName);
     auto reply = bus.call(method);
     reply.read(propValue);

     return std::get<std::string>(propValue);
 }

 } // namespace bios_string

 const std::map<BIOSJsonName, BIOSStringHandler> BIOSStringHandlers = {
     {bIOSEnumJson, bios_enum::setupBIOSStrings},
 };

 const std::map<BIOSJsonName, typeHandler> BIOSTypeHandlers = {
     {bIOSEnumJson, bios_enum::setup},
     {bIOSStrJson, bios_string::setup},
 };

 void setupBIOSStrings(const BIOSJsonName& jsonName, const Json& entry,
                       Strings& strings)
 {
     strings.emplace_back(entry.value("attribute_name", ""));
     auto iter = BIOSStringHandlers.find(jsonName);
     if (iter != BIOSStringHandlers.end())
     {
         iter->second(entry, strings);
     }
 }

 void setupBIOSAttrLookup(const Json& entry, AttrLookup& lookup)
 {
     std::optional<DBusMapping> dBusMap;
     std::string attrName = entry.value("attribute_name", "");

     if (entry.count("dbus") != 0)
     {
         auto dBusEntry = entry.value("dbus", emptyJson);
         std::string objectPath = dBusEntry.value("object_path", "");
         std::string interface = dBusEntry.value("interface", "");
         std::string propertyName = dBusEntry.value("property_name", "");
         if (!objectPath.empty() && !interface.empty() && !propertyName.empty())
         {
             dBusMap = std::optional<DBusMapping>(
                 {objectPath, interface, propertyName});
         }
         else
         {
             log<level::ERR>(
                 "Invalid dbus config",
                 phosphor::logging::entry("OBJPATH=%s",
                                          dBusMap->objectPath.c_str()),
                 phosphor::logging::entry("INTERFACE=%s",
                                          dBusMap->interface.c_str()),
                 phosphor::logging::entry("PROPERTY_NAME=%s",
                                          dBusMap->propertyName.c_str()));
         }
     }
     lookup.emplace(attrName, dBusMap);
 }

 int setupBIOSType(const BIOSJsonName& jsonName, const Json& entry)
 {
     auto iter = BIOSTypeHandlers.find(jsonName);
     if (iter != BIOSTypeHandlers.end())
     {
         iter->second(entry);
     }
     return 0;
 }

 const std::vector<BIOSJsonName> BIOSConfigFiles = {bIOSEnumJson, bIOSStrJson};

 int setupConfig(const char* dirPath)
 {
     if (!BIOSStrings.empty() && !BIOSAttrLookup.empty())
     {
         return 0;
     }

     fs::path dir(dirPath);
     if (!fs::exists(dir) || fs::is_empty(dir))
     {
         log<level::ERR>("BIOS config directory does not exist or empty",
                         entry("DIR=%s", dirPath));
         return -1;
     }
     for (auto jsonName : BIOSConfigFiles)
     {
         Json json;
         if (parseBiosJsonFile(dir, jsonName, json) < 0)
         {
             continue;
         }
         auto entries = json.value("entries", emptyJsonList);
         for (auto& entry : entries)
         {
             setupBIOSStrings(jsonName, entry, BIOSStrings);
             setupBIOSAttrLookup(entry, BIOSAttrLookup);
             setupBIOSType(jsonName, entry);
         }
     }
     if (BIOSStrings.empty())
     { // means there is no attribute
         log<level::ERR>("No attribute is found in the config directory",
                         entry("DIR=%s", dirPath));
         return -1;
     }
     return 0;
 }

 } // namespace bios_parser
	#include "bios_parser.hpp"

	#include "libpldmresponder/utils.hpp"

	#include <filesystem>
	#include <fstream>
	#include <nlohmann/json.hpp>
	#include <optional>
	#include <phosphor-logging/log.hpp>

	namespace bios_parser
	{

	using Json = nlohmann::json;
	namespace fs = std::filesystem;
	using namespace phosphor::logging;

	const std::vector<Json> emptyJsonList{};
	const Json emptyJson{};

	struct DBusMapping
	{
	std::string objectPath; //!< D-Bus object path
	std::string interface; //!< D-Bus interface
	std::string propertyName; //!< D-Bus property name
	};

	using AttrName = std::string;
	using BIOSJsonName = std::string;
	using AttrLookup = std::map<AttrName, std::optional<DBusMapping>>;
	using BIOSStringHandler =
	std::function<int(const Json& entry, Strings& strings)>;
	using AttrLookupHandler = std::function<int(const Json& entry, AttrLookup)>;
	using typeHandler = std::function<int(const Json& entry)>;

	Strings BIOSStrings;
	AttrLookup BIOSAttrLookup;

	const Strings& getStrings()
	{
	return BIOSStrings;
	}

	int parseBiosJsonFile(const fs::path& dirPath, const std::string& fileName,
	Json& fileData)
	{
	int rc = 0;

	fs::path filePath = dirPath / fileName;

	std::ifstream jsonFile(filePath);
	if (!jsonFile.is_open())
	{
	log<level::ERR>("BIOS config file does not exist",
	entry("FILE=%s", filePath.c_str()));
	rc = -1;
	}
	else
	{
	fileData = Json::parse(jsonFile, nullptr, false);
	if (fileData.is_discarded())
	{
	log<level::ERR>("Parsing config file failed",
	entry("FILE=%s", filePath.c_str()));
	rc = -1;
	}
	}

	return rc;
	}

	namespace bios_enum
	{

	namespace internal
	{

	using PropertyValue =
	std::variant<bool, uint8_t, int16_t, uint16_t, int32_t, uint32_t, int64_t,
	uint64_t, double, std::string>;
	using Value = std::string;

	/** @brief Map of DBus property value to attribute value
	*/
	using DbusValToValMap = std::map<PropertyValue, Value>;

	/** @brief Map containing the DBus property value to attribute value map for the
	* BIOS enumeration type attributes
	*/
	std::map<AttrName, DbusValToValMap> dbusValToValMaps;

	/** @brief Map containing the possible and the default values for the BIOS
	* enumeration type attributes.
	*/
	AttrValuesMap valueMap;

	/** @brief Populate the mapping between D-Bus property value and attribute value
	* for the BIOS enumeration attribute.
	*
	* @param[in] type - type of the D-Bus property
	* @param[in] dBusValues - json array of D-Bus property values
	* @param[in] pv - Possible values for the BIOS enumeration attribute
	*
	*/
	DbusValToValMap populateMapping(const std::string& type, const Json& dBusValues,
	const PossibleValues& pv)
	{
	size_t pos = 0;
	PropertyValue value;
	DbusValToValMap valueMap;
	for (auto it = dBusValues.begin(); it != dBusValues.end(); ++it, ++pos)
	{
	if (type == "uint8_t")
	{
	value = static_cast<uint8_t>(it.value());
	}
	else if (type == "uint16_t")
	{
	value = static_cast<uint16_t>(it.value());
	}
	else if (type == "uint32_t")
	{
	value = static_cast<uint32_t>(it.value());
	}
	else if (type == "uint64_t")
	{
	value = static_cast<uint64_t>(it.value());
	}
	else if (type == "int16_t")
	{
	value = static_cast<int16_t>(it.value());
	}
	else if (type == "int32_t")
	{
	value = static_cast<int32_t>(it.value());
	}
	else if (type == "int64_t")
	{
	value = static_cast<int64_t>(it.value());
	}
	else if (type == "bool")
	{
	value = static_cast<bool>(it.value());
	}
	else if (type == "double")
	{
	value = static_cast<double>(it.value());
	}
	else if (type == "string")
	{
	value = static_cast<std::string>(it.value());
	}
	else
	{
	log<level::ERR>("Unknown D-Bus property type",
	entry("TYPE=%s", type.c_str()));
	}

	valueMap.emplace(value, pv[pos]);
	}

	return valueMap;
	}

	} // namespace internal

	int setupBIOSStrings(const Json& entry, Strings& strings)
	{
	Json pvs = entry.value("possible_values", emptyJsonList);

	for (auto& pv : pvs)
	{
	strings.emplace_back(std::move(pv.get<std::string>()));
	}

	return 0;
	}

	int setup(const Json& entry)
	{
	PossibleValues possibleValues;
	DefaultValues defaultValues;

	std::string attrName = entry.value("attribute_name", "");
	Json pv = entry["possible_values"];
	for (auto& val : pv)
	{
	possibleValues.emplace_back(std::move(val));
	}
	Json dv = entry["default_values"];
	for (auto& val : dv)
	{
	defaultValues.emplace_back(std::move(val));
	}
	if (entry.count("dbus") != 0)
	{
	auto dbusEntry = entry.value("dbus", emptyJson);
	std::string propertyType = dbusEntry.value("property_type", "");
	Json propValues = dbusEntry["property_values"];
	internal::dbusValToValMaps.emplace(
	attrName, internal::populateMapping(propertyType, propValues,
	possibleValues));
	}
	// Defaulting all the types of attributes to BIOSEnumeration
	internal::valueMap.emplace(std::move(attrName),
	std::make_tuple(entry.count("dbus") == 0,
	std::move(possibleValues),
	std::move(defaultValues)));
	return 0;
	}

	const AttrValuesMap& getValues()
	{
	return internal::valueMap;
	}

	CurrentValues getAttrValue(const AttrName& attrName)
	{
	const auto& dBusMap = BIOSAttrLookup.at(attrName);
	CurrentValues currentValues;
	internal::PropertyValue propValue;

	if (dBusMap == std::nullopt)
	{
	const auto& valueEntry = internal::valueMap.at(attrName);
	const auto& [readOnly, possibleValues, currentValues] = valueEntry;
	return currentValues;
	}

	const auto& dbusValToValMap = internal::dbusValToValMaps.at(attrName);
	auto bus = sdbusplus::bus::new_default();
	auto service = pldm::responder::getService(bus, dBusMap.value().objectPath,
	dBusMap.value().interface);
	auto method =
	bus.new_method_call(service.c_str(), dBusMap.value().objectPath.c_str(),
	"org.freedesktop.DBus.Properties", "Get");
	method.append(dBusMap->interface, dBusMap->propertyName);
	auto reply = bus.call(method);
	reply.read(propValue);

	auto iter = dbusValToValMap.find(propValue);
	if (iter != dbusValToValMap.end())
	{
	currentValues.push_back(iter->second);
	}

	return currentValues;
	}

	} // namespace bios_enum

	namespace bios_string
	{

	/** @brief BIOS string types
	*/
	enum BiosStringEncoding
	{
	UNKNOWN = 0x00,
	ASCII = 0x01,
	HEX = 0x02,
	UTF_8 = 0x03,
	UTF_16LE = 0x04,
	UTF_16BE = 0x05,
	VENDOR_SPECIFIC = 0xFF
	};

	const std::map<std::string, uint8_t> strTypeMap{
	{"Unknown", UNKNOWN},
	{"ASCII", ASCII},
	{"Hex", HEX},
	{"UTF-8", UTF_8},
	{"UTF-16LE", UTF_16LE},
	{"UTF-16LE", UTF_16LE},
	{"Vendor Specific", VENDOR_SPECIFIC}};

	namespace internal
	{

	/** @brief Map containing the possible and the default values for the BIOS
	* string type attributes.
	*/
	AttrValuesMap valueMap;

	} // namespace internal

	int setup(const Json& entry)
	{

	std::string attr = entry.value("attribute_name", "");
	// Transfer string type from string to enum
	std::string strTypeTmp = entry.value("string_type", "Unknown");
	auto iter = strTypeMap.find(strTypeTmp);
	if (iter == strTypeMap.end())
	{
	log<level::ERR>(
	"Wrong string type",
	phosphor::logging::entry("STRING_TYPE=%s", strTypeTmp.c_str()),
	phosphor::logging::entry("ATTRIBUTE_NAME=%s", attr.c_str()));
	return -1;
	}
	uint8_t strType = iter->second;

	uint16_t minStrLen = entry.value("minimum_string_length", 0);
	uint16_t maxStrLen = entry.value("maximum_string_length", 0);
	if (maxStrLen - minStrLen < 0)
	{
	log<level::ERR>(
	"Maximum string length is smaller than minimum string length",
	phosphor::logging::entry("ATTRIBUTE_NAME=%s", attr.c_str()));
	return -1;
	}
	uint16_t defaultStrLen = entry.value("default_string_length", 0);
	std::string defaultStr = entry.value("default_string", "");
	if ((defaultStrLen == 0) && (defaultStr.size() > 0))
	{
	log<level::ERR>(
	"Default string length is 0, but default string is existing",
	phosphor::logging::entry("ATTRIBUTE_NAME=%s", attr.c_str()));
	return -1;
	}

	// Defaulting all the types of attributes to BIOSString
	internal::valueMap.emplace(
	std::move(attr),
	std::make_tuple(entry.count("dbus") == 0, strType, minStrLen, maxStrLen,
	defaultStrLen, std::move(defaultStr)));

	return 0;
	}

	const AttrValuesMap& getValues()
	{
	return internal::valueMap;
	}

	std::string getAttrValue(const AttrName& attrName)
	{
	const auto& dBusMap = BIOSAttrLookup.at(attrName);
	std::variant<std::string> propValue;

	if (dBusMap == std::nullopt)
	{ // return default string
	const auto& valueEntry = internal::valueMap.at(attrName);
	return std::get<DefaultStr>(valueEntry);
	}

	auto bus = sdbusplus::bus::new_default();
	auto service = pldm::responder::getService(bus, dBusMap->objectPath,
	dBusMap->interface);
	auto method =
	bus.new_method_call(service.c_str(), dBusMap->objectPath.c_str(),
	"org.freedesktop.DBus.Properties", "Get");
	method.append(dBusMap->interface, dBusMap->propertyName);
	auto reply = bus.call(method);
	reply.read(propValue);

	return std::get<std::string>(propValue);
	}

	} // namespace bios_string

	const std::map<BIOSJsonName, BIOSStringHandler> BIOSStringHandlers = {
	{bIOSEnumJson, bios_enum::setupBIOSStrings},
	};

	const std::map<BIOSJsonName, typeHandler> BIOSTypeHandlers = {
	{bIOSEnumJson, bios_enum::setup},
	{bIOSStrJson, bios_string::setup},
	};

	void setupBIOSStrings(const BIOSJsonName& jsonName, const Json& entry,
	Strings& strings)
	{
	strings.emplace_back(entry.value("attribute_name", ""));
	auto iter = BIOSStringHandlers.find(jsonName);
	if (iter != BIOSStringHandlers.end())
	{
	iter->second(entry, strings);
	}
	}

	void setupBIOSAttrLookup(const Json& entry, AttrLookup& lookup)
	{
	std::optional<DBusMapping> dBusMap;
	std::string attrName = entry.value("attribute_name", "");

	if (entry.count("dbus") != 0)
	{
	auto dBusEntry = entry.value("dbus", emptyJson);
	std::string objectPath = dBusEntry.value("object_path", "");
	std::string interface = dBusEntry.value("interface", "");
	std::string propertyName = dBusEntry.value("property_name", "");
	if (!objectPath.empty() && !interface.empty() && !propertyName.empty())
	{
	dBusMap = std::optional<DBusMapping>(
	{objectPath, interface, propertyName});
	}
	else
	{
	log<level::ERR>(
	"Invalid dbus config",
	phosphor::logging::entry("OBJPATH=%s",
	dBusMap->objectPath.c_str()),
	phosphor::logging::entry("INTERFACE=%s",
	dBusMap->interface.c_str()),
	phosphor::logging::entry("PROPERTY_NAME=%s",
	dBusMap->propertyName.c_str()));
	}
	}
	lookup.emplace(attrName, dBusMap);
	}

	int setupBIOSType(const BIOSJsonName& jsonName, const Json& entry)
	{
	auto iter = BIOSTypeHandlers.find(jsonName);
	if (iter != BIOSTypeHandlers.end())
	{
	iter->second(entry);
	}
	return 0;
	}

	const std::vector<BIOSJsonName> BIOSConfigFiles = {bIOSEnumJson, bIOSStrJson};

	int setupConfig(const char* dirPath)
	{
	if (!BIOSStrings.empty() && !BIOSAttrLookup.empty())
	{
	return 0;
	}

	fs::path dir(dirPath);
	if (!fs::exists(dir) \|\| fs::is_empty(dir))
	{
	log<level::ERR>("BIOS config directory does not exist or empty",
	entry("DIR=%s", dirPath));
	return -1;
	}
	for (auto jsonName : BIOSConfigFiles)
	{
	Json json;
	if (parseBiosJsonFile(dir, jsonName, json) < 0)
	{
	continue;
	}
	auto entries = json.value("entries", emptyJsonList);
	for (auto& entry : entries)
	{
	setupBIOSStrings(jsonName, entry, BIOSStrings);
	setupBIOSAttrLookup(entry, BIOSAttrLookup);
	setupBIOSType(jsonName, entry);
	}
	}
	if (BIOSStrings.empty())
	{ // means there is no attribute
	log<level::ERR>("No attribute is found in the config directory",
	entry("DIR=%s", dirPath));
	return -1;
	}
	return 0;
	}

	} // namespace bios_parser