ibm_vpd_utils.cpp - openbmc/openpower-vpd-parser - Gitiles

 #include "config.h"

 #include "ibm_vpd_utils.hpp"

 #include "common_utility.hpp"
 #include "defines.hpp"
 #include "vpd_exceptions.hpp"

 #include <filesystem>
 #include <fstream>
 #include <iomanip>
 #include <nlohmann/json.hpp>
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/log.hpp>
 #include <regex>
 #include <sdbusplus/server.hpp>
 #include <sstream>
 #include <vector>
 #include <xyz/openbmc_project/Common/error.hpp>

 using json = nlohmann::json;

 namespace openpower
 {
 namespace vpd
 {
 using namespace openpower::vpd::constants;
 using namespace inventory;
 using namespace phosphor::logging;
 using namespace sdbusplus::xyz::openbmc_project::Common::Error;
 using namespace record;
 using namespace openpower::vpd::exceptions;
 using namespace common::utility;
 using Severity = openpower::vpd::constants::PelSeverity;
 namespace fs = std::filesystem;

 // mapping of severity enum to severity interface
 static std::unordered_map<Severity, std::string> sevMap = {
     {Severity::INFORMATIONAL,
      "xyz.openbmc_project.Logging.Entry.Level.Informational"},
     {Severity::DEBUG, "xyz.openbmc_project.Logging.Entry.Level.Debug"},
     {Severity::NOTICE, "xyz.openbmc_project.Logging.Entry.Level.Notice"},
     {Severity::WARNING, "xyz.openbmc_project.Logging.Entry.Level.Warning"},
     {Severity::CRITICAL, "xyz.openbmc_project.Logging.Entry.Level.Critical"},
     {Severity::EMERGENCY, "xyz.openbmc_project.Logging.Entry.Level.Emergency"},
     {Severity::ERROR, "xyz.openbmc_project.Logging.Entry.Level.Error"},
     {Severity::ALERT, "xyz.openbmc_project.Logging.Entry.Level.Alert"}};

 namespace inventory
 {

 MapperResponse
     getObjectSubtreeForInterfaces(const std::string& root, const int32_t depth,
                                   const std::vector<std::string>& interfaces)
 {
     auto bus = sdbusplus::bus::new_default();
     auto mapperCall = bus.new_method_call(mapperDestination, mapperObjectPath,
                                           mapperInterface, "GetSubTree");
     mapperCall.append(root);
     mapperCall.append(depth);
     mapperCall.append(interfaces);

     MapperResponse result = {};

     try
     {
         auto response = bus.call(mapperCall);

         response.read(result);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         log<level::ERR>("Error in mapper GetSubTree",
                         entry("ERROR=%s", e.what()));
     }

     return result;
 }

 } // namespace inventory

 LE2ByteData readUInt16LE(Binary::const_iterator iterator)
 {
     LE2ByteData lowByte = *iterator;
     LE2ByteData highByte = *(iterator + 1);
     lowByte |= (highByte << 8);
     return lowByte;
 }

 /** @brief Encodes a keyword for D-Bus.
  */
 string encodeKeyword(const string& kw, const string& encoding)
 {
     if (encoding == "MAC")
     {
         string res{};
         size_t first = kw[0];
         res += toHex(first >> 4);
         res += toHex(first & 0x0f);
         for (size_t i = 1; i < kw.size(); ++i)
         {
             res += ":";
             res += toHex(kw[i] >> 4);
             res += toHex(kw[i] & 0x0f);
         }
         return res;
     }
     else if (encoding == "DATE")
     {
         // Date, represent as
         // <year>-<month>-<day> <hour>:<min>
         string res{};
         static constexpr uint8_t skipPrefix = 3;

         auto strItr = kw.begin();
         advance(strItr, skipPrefix);
         for_each(strItr, kw.end(), [&res](size_t c) { res += c; });

         res.insert(BD_YEAR_END, 1, '-');
         res.insert(BD_MONTH_END, 1, '-');
         res.insert(BD_DAY_END, 1, ' ');
         res.insert(BD_HOUR_END, 1, ':');

         return res;
     }
     else // default to string encoding
     {
         return string(kw.begin(), kw.end());
     }
 }

 string readBusProperty(const string& obj, const string& inf, const string& prop)
 {
     std::string propVal{};
     std::string object = INVENTORY_PATH + obj;
     auto bus = sdbusplus::bus::new_default();
     auto properties = bus.new_method_call(
         "xyz.openbmc_project.Inventory.Manager", object.c_str(),
         "org.freedesktop.DBus.Properties", "Get");
     properties.append(inf);
     properties.append(prop);
     auto result = bus.call(properties);
     if (!result.is_method_error())
     {
         variant<Binary, string> val;
         result.read(val);
         if (auto pVal = get_if<Binary>(&val))
         {
             propVal.assign(reinterpret_cast<const char*>(pVal->data()),
                            pVal->size());
         }
         else if (auto pVal = get_if<string>(&val))
         {
             propVal.assign(pVal->data(), pVal->size());
         }
     }
     return propVal;
 }

 void createPEL(const std::map<std::string, std::string>& additionalData,
                const Severity& sev, const std::string& errIntf)
 {
     try
     {
         std::string pelSeverity =
             "xyz.openbmc_project.Logging.Entry.Level.Error";
         auto bus = sdbusplus::bus::new_default();
         auto service = getService(bus, loggerObjectPath, loggerCreateInterface);
         auto method = bus.new_method_call(service.c_str(), loggerObjectPath,
                                           loggerCreateInterface, "Create");

         auto itr = sevMap.find(sev);
         if (itr != sevMap.end())
         {
             pelSeverity = itr->second;
         }

         method.append(errIntf, pelSeverity, additionalData);
         auto resp = bus.call(method);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         throw std::runtime_error(
             "Error in invoking D-Bus logging create interface to register PEL");
     }
 }

 inventory::VPDfilepath getVpdFilePath(const string& jsonFile,
                                       const std::string& ObjPath)
 {
     ifstream inventoryJson(jsonFile);
     const auto& jsonObject = json::parse(inventoryJson);
     inventory::VPDfilepath filePath{};

     if (jsonObject.find("frus") == jsonObject.end())
     {
         throw(VpdJsonException(
             "Invalid JSON structure - frus{} object not found in ", jsonFile));
     }

     const nlohmann::json& groupFRUS =
         jsonObject["frus"].get_ref<const nlohmann::json::object_t&>();
     for (const auto& itemFRUS : groupFRUS.items())
     {
         const std::vector<nlohmann::json>& groupEEPROM =
             itemFRUS.value().get_ref<const nlohmann::json::array_t&>();
         for (const auto& itemEEPROM : groupEEPROM)
         {
             if (itemEEPROM["inventoryPath"]
                     .get_ref<const nlohmann::json::string_t&>() == ObjPath)
             {
                 filePath = itemFRUS.key();
                 return filePath;
             }
         }
     }

     return filePath;
 }

 bool isPathInJson(const std::string& eepromPath)
 {
     bool present = false;
     ifstream inventoryJson(INVENTORY_JSON_SYM_LINK);

     try
     {
         auto js = json::parse(inventoryJson);
         if (js.find("frus") == js.end())
         {
             throw(VpdJsonException(
                 "Invalid JSON structure - frus{} object not found in ",
                 INVENTORY_JSON_SYM_LINK));
         }
         json fruJson = js["frus"];

         if (fruJson.find(eepromPath) != fruJson.end())
         {
             present = true;
         }
     }
     catch (const json::parse_error& ex)
     {
         throw(VpdJsonException("Json Parsing failed", INVENTORY_JSON_SYM_LINK));
     }
     return present;
 }

 bool isRecKwInDbusJson(const std::string& recordName,
                        const std::string& keyword)
 {
     ifstream propertyJson(DBUS_PROP_JSON);
     json dbusProperty;
     bool present = false;

     if (propertyJson.is_open())
     {
         try
         {
             auto dbusPropertyJson = json::parse(propertyJson);
             if (dbusPropertyJson.find("dbusProperties") ==
                 dbusPropertyJson.end())
             {
                 throw(VpdJsonException("dbusProperties{} object not found in "
                                        "DbusProperties json : ",
                                        DBUS_PROP_JSON));
             }

             dbusProperty = dbusPropertyJson["dbusProperties"];
             if (dbusProperty.contains(recordName))
             {
                 const vector<string>& kwdsToPublish = dbusProperty[recordName];
                 if (find(kwdsToPublish.begin(), kwdsToPublish.end(), keyword) !=
                     kwdsToPublish.end()) // present
                 {
                     present = true;
                 }
             }
         }
         catch (const json::parse_error& ex)
         {
             throw(VpdJsonException("Json Parsing failed", DBUS_PROP_JSON));
         }
     }
     else
     {
         // If dbus properties json is not available, we assume the given
         // record-keyword is part of dbus-properties json. So setting the bool
         // variable to true.
         present = true;
     }
     return present;
 }

 vpdType vpdTypeCheck(const Binary& vpdVector)
 {
     // Read first 3 Bytes to check the 11S bar code format
     std::string is11SFormat = "";
     for (uint8_t i = 0; i < FORMAT_11S_LEN; i++)
     {
         is11SFormat += vpdVector[MEMORY_VPD_DATA_START + i];
     }

     if (vpdVector[IPZ_DATA_START] == KW_VAL_PAIR_START_TAG)
     {
         // IPZ VPD FORMAT
         return vpdType::IPZ_VPD;
     }
     else if (vpdVector[KW_VPD_DATA_START] == KW_VPD_START_TAG)
     {
         // KEYWORD VPD FORMAT
         return vpdType::KEYWORD_VPD;
     }
     else if (is11SFormat.compare(MEMORY_VPD_START_TAG) == 0)
     {
         // Memory VPD format
         return vpdType::MEMORY_VPD;
     }

     // INVALID VPD FORMAT
     return vpdType::INVALID_VPD_FORMAT;
 }

 const string getIM(const Parsed& vpdMap)
 {
     Binary imVal;
     auto property = vpdMap.find("VSBP");
     if (property != vpdMap.end())
     {
         auto kw = (property->second).find("IM");
         if (kw != (property->second).end())
         {
             copy(kw->second.begin(), kw->second.end(), back_inserter(imVal));
         }
     }

     ostringstream oss;
     for (auto& i : imVal)
     {
         oss << setw(2) << setfill('0') << hex << static_cast<int>(i);
     }

     return oss.str();
 }

 const string getHW(const Parsed& vpdMap)
 {
     Binary hwVal;
     auto prop = vpdMap.find("VINI");
     if (prop != vpdMap.end())
     {
         auto kw = (prop->second).find("HW");
         if (kw != (prop->second).end())
         {
             copy(kw->second.begin(), kw->second.end(), back_inserter(hwVal));
         }
     }

     ostringstream hwString;
     for (auto& i : hwVal)
     {
         hwString << setw(2) << setfill('0') << hex << static_cast<int>(i);
     }

     return hwString.str();
 }

 string getSystemsJson(const Parsed& vpdMap)
 {
     string jsonPath = "/usr/share/vpd/";
     string jsonName{};

     ifstream systemJson(SYSTEM_JSON);
     if (!systemJson)
     {
         throw((VpdJsonException("Failed to access Json path", SYSTEM_JSON)));
     }

     try
     {
         auto js = json::parse(systemJson);

         const string hwKeyword = getHW(vpdMap);
         const string imKeyword = getIM(vpdMap);

         if (js.find("system") == js.end())
         {
             throw runtime_error("Invalid systems Json");
         }

         if (js["system"].find(imKeyword) == js["system"].end())
         {
             throw runtime_error(
                 "Invalid system. This system type is not present "
                 "in the systemsJson. IM: " +
                 imKeyword);
         }

         if ((js["system"][imKeyword].find("constraint") !=
              js["system"][imKeyword].end()) &&
             (hwKeyword == js["system"][imKeyword]["constraint"]["HW"]))
         {
             jsonName = js["system"][imKeyword]["constraint"]["json"];
         }
         else if (js["system"][imKeyword].find("default") !=
                  js["system"][imKeyword].end())
         {
             jsonName = js["system"][imKeyword]["default"];
         }
         else
         {
             throw runtime_error(
                 "Bad System json. Neither constraint nor default found");
         }

         jsonPath += jsonName;
     }

     catch (const json::parse_error& ex)
     {
         throw(VpdJsonException("Json Parsing failed", SYSTEM_JSON));
     }
     return jsonPath;
 }

 void udevToGenericPath(string& file)
 {
     // Sample udevEvent i2c path :
     // "/sys/devices/platform/ahb/ahb:apb/ahb:apb:bus@1e78a000/1e78a480.i2c-bus/i2c-8/8-0051/8-00510/nvmem"
     // find if the path contains the word i2c in it.
     if (file.find("i2c") != string::npos)
     {
         string i2cBusAddr{};

         // Every udev i2c path should have the common pattern
         // "i2c-bus_number/bus_number-vpd_address". Search for
         // "bus_number-vpd_address".
         regex i2cPattern("((i2c)-[0-9]+\\/)([0-9]+-[0-9]{4})");
         smatch match;
         if (regex_search(file, match, i2cPattern))
         {
             i2cBusAddr = match.str(3);
         }
         else
         {
             cerr << "The given udev path < " << file
                  << " > doesn't match the required pattern. Skipping VPD "
                     "collection."
                  << endl;
             exit(EXIT_SUCCESS);
         }
         // Forming the generic file path
         file = i2cPathPrefix + i2cBusAddr + "/eeprom";
     }
     // Sample udevEvent spi path :
     // "/sys/devices/platform/ahb/ahb:apb/1e79b000.fsi/fsi-master/fsi0/slave@00:00/00:00:00:04/spi_master/spi2/spi2.0/spi2.00/nvmem"
     // find if the path contains the word spi in it.
     else if (file.find("spi") != string::npos)
     {
         // Every udev spi path will have common pattern "spi<Digit>/", which
         // describes the spi bus number at which the fru is connected; Followed
         // by a slash following the vpd address of the fru. Taking the above
         // input as a common key, we try to search for the pattern "spi<Digit>/"
         // using regular expression.
         regex spiPattern("((spi)[0-9]+)(\\/)");
         string spiBus{};
         smatch match;
         if (regex_search(file, match, spiPattern))
         {
             spiBus = match.str(1);
         }
         else
         {
             cerr << "The given udev path < " << file
                  << " > doesn't match the required pattern. Skipping VPD "
                     "collection."
                  << endl;
             exit(EXIT_SUCCESS);
         }
         // Forming the generic path
         file = spiPathPrefix + spiBus + ".0/eeprom";
     }
     else
     {
         cerr << "\n The given EEPROM path < " << file
              << " > is not valid. It's neither I2C nor "
                 "SPI path. Skipping VPD collection.."
              << endl;
         exit(EXIT_SUCCESS);
     }
 }
 string getBadVpdName(const string& file)
 {
     string badVpd = BAD_VPD_DIR;
     if (file.find("i2c") != string::npos)
     {
         badVpd += "i2c-";
         regex i2cPattern("(at24/)([0-9]+-[0-9]+)\\/");
         smatch match;
         if (regex_search(file, match, i2cPattern))
         {
             badVpd += match.str(2);
         }
     }
     else if (file.find("spi") != string::npos)
     {
         regex spiPattern("((spi)[0-9]+)(.0)");
         smatch match;
         if (regex_search(file, match, spiPattern))
         {
             badVpd += match.str(1);
         }
     }
     return badVpd;
 }

 void dumpBadVpd(const string& file, const Binary& vpdVector)
 {
     fs::path badVpdDir = BAD_VPD_DIR;
     fs::create_directory(badVpdDir);
     string badVpdPath = getBadVpdName(file);
     if (fs::exists(badVpdPath))
     {
         std::error_code ec;
         fs::remove(badVpdPath, ec);
         if (ec) // error code
         {
             string error = "Error removing the existing broken vpd in ";
             error += badVpdPath;
             error += ". Error code : ";
             error += ec.value();
             error += ". Error message : ";
             error += ec.message();
             throw runtime_error(error);
         }
     }
     ofstream badVpdFileStream(badVpdPath, ofstream::binary);
     if (!badVpdFileStream)
     {
         throw runtime_error("Failed to open bad vpd file path in /tmp/bad-vpd. "
                             "Unable to dump the broken/bad vpd file.");
     }
     badVpdFileStream.write(reinterpret_cast<const char*>(vpdVector.data()),
                            vpdVector.size());
 }

 const string getKwVal(const Parsed& vpdMap, const string& rec,
                       const string& kwd)
 {
     string kwVal{};

     auto findRec = vpdMap.find(rec);

     // check if record is found in map we got by parser
     if (findRec != vpdMap.end())
     {
         auto findKwd = findRec->second.find(kwd);

         if (findKwd != findRec->second.end())
         {
             kwVal = findKwd->second;
         }
     }

     return kwVal;
 }

 } // namespace vpd
 } // namespace openpower
	#include "config.h"

	#include "ibm_vpd_utils.hpp"

	#include "common_utility.hpp"
	#include "defines.hpp"
	#include "vpd_exceptions.hpp"

	#include <filesystem>
	#include <fstream>
	#include <iomanip>
	#include <nlohmann/json.hpp>
	#include <phosphor-logging/elog-errors.hpp>
	#include <phosphor-logging/log.hpp>
	#include <regex>
	#include <sdbusplus/server.hpp>
	#include <sstream>
	#include <vector>
	#include <xyz/openbmc_project/Common/error.hpp>

	using json = nlohmann::json;

	namespace openpower
	{
	namespace vpd
	{
	using namespace openpower::vpd::constants;
	using namespace inventory;
	using namespace phosphor::logging;
	using namespace sdbusplus::xyz::openbmc_project::Common::Error;
	using namespace record;
	using namespace openpower::vpd::exceptions;
	using namespace common::utility;
	using Severity = openpower::vpd::constants::PelSeverity;
	namespace fs = std::filesystem;

	// mapping of severity enum to severity interface
	static std::unordered_map<Severity, std::string> sevMap = {
	{Severity::INFORMATIONAL,
	"xyz.openbmc_project.Logging.Entry.Level.Informational"},
	{Severity::DEBUG, "xyz.openbmc_project.Logging.Entry.Level.Debug"},
	{Severity::NOTICE, "xyz.openbmc_project.Logging.Entry.Level.Notice"},
	{Severity::WARNING, "xyz.openbmc_project.Logging.Entry.Level.Warning"},
	{Severity::CRITICAL, "xyz.openbmc_project.Logging.Entry.Level.Critical"},
	{Severity::EMERGENCY, "xyz.openbmc_project.Logging.Entry.Level.Emergency"},
	{Severity::ERROR, "xyz.openbmc_project.Logging.Entry.Level.Error"},
	{Severity::ALERT, "xyz.openbmc_project.Logging.Entry.Level.Alert"}};

	namespace inventory
	{

	MapperResponse
	getObjectSubtreeForInterfaces(const std::string& root, const int32_t depth,
	const std::vector<std::string>& interfaces)
	{
	auto bus = sdbusplus::bus::new_default();
	auto mapperCall = bus.new_method_call(mapperDestination, mapperObjectPath,
	mapperInterface, "GetSubTree");
	mapperCall.append(root);
	mapperCall.append(depth);
	mapperCall.append(interfaces);

	MapperResponse result = {};

	try
	{
	auto response = bus.call(mapperCall);

	response.read(result);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	log<level::ERR>("Error in mapper GetSubTree",
	entry("ERROR=%s", e.what()));
	}

	return result;
	}

	} // namespace inventory

	LE2ByteData readUInt16LE(Binary::const_iterator iterator)
	{
	LE2ByteData lowByte = *iterator;
	LE2ByteData highByte = *(iterator + 1);
	lowByte \|= (highByte << 8);
	return lowByte;
	}

	/** @brief Encodes a keyword for D-Bus.
	*/
	string encodeKeyword(const string& kw, const string& encoding)
	{
	if (encoding == "MAC")
	{
	string res{};
	size_t first = kw[0];
	res += toHex(first >> 4);
	res += toHex(first & 0x0f);
	for (size_t i = 1; i < kw.size(); ++i)
	{
	res += ":";
	res += toHex(kw[i] >> 4);
	res += toHex(kw[i] & 0x0f);
	}
	return res;
	}
	else if (encoding == "DATE")
	{
	// Date, represent as
	// <year>-<month>-<day> <hour>:<min>
	string res{};
	static constexpr uint8_t skipPrefix = 3;

	auto strItr = kw.begin();
	advance(strItr, skipPrefix);
	for_each(strItr, kw.end(), [&res](size_t c) { res += c; });

	res.insert(BD_YEAR_END, 1, '-');
	res.insert(BD_MONTH_END, 1, '-');
	res.insert(BD_DAY_END, 1, ' ');
	res.insert(BD_HOUR_END, 1, ':');

	return res;
	}
	else // default to string encoding
	{
	return string(kw.begin(), kw.end());
	}
	}

	string readBusProperty(const string& obj, const string& inf, const string& prop)
	{
	std::string propVal{};
	std::string object = INVENTORY_PATH + obj;
	auto bus = sdbusplus::bus::new_default();
	auto properties = bus.new_method_call(
	"xyz.openbmc_project.Inventory.Manager", object.c_str(),
	"org.freedesktop.DBus.Properties", "Get");
	properties.append(inf);
	properties.append(prop);
	auto result = bus.call(properties);
	if (!result.is_method_error())
	{
	variant<Binary, string> val;
	result.read(val);
	if (auto pVal = get_if<Binary>(&val))
	{
	propVal.assign(reinterpret_cast<const char*>(pVal->data()),
	pVal->size());
	}
	else if (auto pVal = get_if<string>(&val))
	{
	propVal.assign(pVal->data(), pVal->size());
	}
	}
	return propVal;
	}

	void createPEL(const std::map<std::string, std::string>& additionalData,
	const Severity& sev, const std::string& errIntf)
	{
	try
	{
	std::string pelSeverity =
	"xyz.openbmc_project.Logging.Entry.Level.Error";
	auto bus = sdbusplus::bus::new_default();
	auto service = getService(bus, loggerObjectPath, loggerCreateInterface);
	auto method = bus.new_method_call(service.c_str(), loggerObjectPath,
	loggerCreateInterface, "Create");

	auto itr = sevMap.find(sev);
	if (itr != sevMap.end())
	{
	pelSeverity = itr->second;
	}

	method.append(errIntf, pelSeverity, additionalData);
	auto resp = bus.call(method);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	throw std::runtime_error(
	"Error in invoking D-Bus logging create interface to register PEL");
	}
	}

	inventory::VPDfilepath getVpdFilePath(const string& jsonFile,
	const std::string& ObjPath)
	{
	ifstream inventoryJson(jsonFile);
	const auto& jsonObject = json::parse(inventoryJson);
	inventory::VPDfilepath filePath{};

	if (jsonObject.find("frus") == jsonObject.end())
	{
	throw(VpdJsonException(
	"Invalid JSON structure - frus{} object not found in ", jsonFile));
	}

	const nlohmann::json& groupFRUS =
	jsonObject["frus"].get_ref<const nlohmann::json::object_t&>();
	for (const auto& itemFRUS : groupFRUS.items())
	{
	const std::vector<nlohmann::json>& groupEEPROM =
	itemFRUS.value().get_ref<const nlohmann::json::array_t&>();
	for (const auto& itemEEPROM : groupEEPROM)
	{
	if (itemEEPROM["inventoryPath"]
	.get_ref<const nlohmann::json::string_t&>() == ObjPath)
	{
	filePath = itemFRUS.key();
	return filePath;
	}
	}
	}

	return filePath;
	}

	bool isPathInJson(const std::string& eepromPath)
	{
	bool present = false;
	ifstream inventoryJson(INVENTORY_JSON_SYM_LINK);

	try
	{
	auto js = json::parse(inventoryJson);
	if (js.find("frus") == js.end())
	{
	throw(VpdJsonException(
	"Invalid JSON structure - frus{} object not found in ",
	INVENTORY_JSON_SYM_LINK));
	}
	json fruJson = js["frus"];

	if (fruJson.find(eepromPath) != fruJson.end())
	{
	present = true;
	}
	}
	catch (const json::parse_error& ex)
	{
	throw(VpdJsonException("Json Parsing failed", INVENTORY_JSON_SYM_LINK));
	}
	return present;
	}

	bool isRecKwInDbusJson(const std::string& recordName,
	const std::string& keyword)
	{
	ifstream propertyJson(DBUS_PROP_JSON);
	json dbusProperty;
	bool present = false;

	if (propertyJson.is_open())
	{
	try
	{
	auto dbusPropertyJson = json::parse(propertyJson);
	if (dbusPropertyJson.find("dbusProperties") ==
	dbusPropertyJson.end())
	{
	throw(VpdJsonException("dbusProperties{} object not found in "
	"DbusProperties json : ",
	DBUS_PROP_JSON));
	}

	dbusProperty = dbusPropertyJson["dbusProperties"];
	if (dbusProperty.contains(recordName))
	{
	const vector<string>& kwdsToPublish = dbusProperty[recordName];
	if (find(kwdsToPublish.begin(), kwdsToPublish.end(), keyword) !=
	kwdsToPublish.end()) // present
	{
	present = true;
	}
	}
	}
	catch (const json::parse_error& ex)
	{
	throw(VpdJsonException("Json Parsing failed", DBUS_PROP_JSON));
	}
	}
	else
	{
	// If dbus properties json is not available, we assume the given
	// record-keyword is part of dbus-properties json. So setting the bool
	// variable to true.
	present = true;
	}
	return present;
	}

	vpdType vpdTypeCheck(const Binary& vpdVector)
	{
	// Read first 3 Bytes to check the 11S bar code format
	std::string is11SFormat = "";
	for (uint8_t i = 0; i < FORMAT_11S_LEN; i++)
	{
	is11SFormat += vpdVector[MEMORY_VPD_DATA_START + i];
	}

	if (vpdVector[IPZ_DATA_START] == KW_VAL_PAIR_START_TAG)
	{
	// IPZ VPD FORMAT
	return vpdType::IPZ_VPD;
	}
	else if (vpdVector[KW_VPD_DATA_START] == KW_VPD_START_TAG)
	{
	// KEYWORD VPD FORMAT
	return vpdType::KEYWORD_VPD;
	}
	else if (is11SFormat.compare(MEMORY_VPD_START_TAG) == 0)
	{
	// Memory VPD format
	return vpdType::MEMORY_VPD;
	}

	// INVALID VPD FORMAT
	return vpdType::INVALID_VPD_FORMAT;
	}

	const string getIM(const Parsed& vpdMap)
	{
	Binary imVal;
	auto property = vpdMap.find("VSBP");
	if (property != vpdMap.end())
	{
	auto kw = (property->second).find("IM");
	if (kw != (property->second).end())
	{
	copy(kw->second.begin(), kw->second.end(), back_inserter(imVal));
	}
	}

	ostringstream oss;
	for (auto& i : imVal)
	{
	oss << setw(2) << setfill('0') << hex << static_cast<int>(i);
	}

	return oss.str();
	}

	const string getHW(const Parsed& vpdMap)
	{
	Binary hwVal;
	auto prop = vpdMap.find("VINI");
	if (prop != vpdMap.end())
	{
	auto kw = (prop->second).find("HW");
	if (kw != (prop->second).end())
	{
	copy(kw->second.begin(), kw->second.end(), back_inserter(hwVal));
	}
	}

	ostringstream hwString;
	for (auto& i : hwVal)
	{
	hwString << setw(2) << setfill('0') << hex << static_cast<int>(i);
	}

	return hwString.str();
	}

	string getSystemsJson(const Parsed& vpdMap)
	{
	string jsonPath = "/usr/share/vpd/";
	string jsonName{};

	ifstream systemJson(SYSTEM_JSON);
	if (!systemJson)
	{
	throw((VpdJsonException("Failed to access Json path", SYSTEM_JSON)));
	}

	try
	{
	auto js = json::parse(systemJson);

	const string hwKeyword = getHW(vpdMap);
	const string imKeyword = getIM(vpdMap);

	if (js.find("system") == js.end())
	{
	throw runtime_error("Invalid systems Json");
	}

	if (js["system"].find(imKeyword) == js["system"].end())
	{
	throw runtime_error(
	"Invalid system. This system type is not present "
	"in the systemsJson. IM: " +
	imKeyword);
	}

	if ((js["system"][imKeyword].find("constraint") !=
	js["system"][imKeyword].end()) &&
	(hwKeyword == js["system"][imKeyword]["constraint"]["HW"]))
	{
	jsonName = js["system"][imKeyword]["constraint"]["json"];
	}
	else if (js["system"][imKeyword].find("default") !=
	js["system"][imKeyword].end())
	{
	jsonName = js["system"][imKeyword]["default"];
	}
	else
	{
	throw runtime_error(
	"Bad System json. Neither constraint nor default found");
	}

	jsonPath += jsonName;
	}

	catch (const json::parse_error& ex)
	{
	throw(VpdJsonException("Json Parsing failed", SYSTEM_JSON));
	}
	return jsonPath;
	}

	void udevToGenericPath(string& file)
	{
	// Sample udevEvent i2c path :
	// "/sys/devices/platform/ahb/ahb:apb/ahb:apb:bus@1e78a000/1e78a480.i2c-bus/i2c-8/8-0051/8-00510/nvmem"
	// find if the path contains the word i2c in it.
	if (file.find("i2c") != string::npos)
	{
	string i2cBusAddr{};

	// Every udev i2c path should have the common pattern
	// "i2c-bus_number/bus_number-vpd_address". Search for
	// "bus_number-vpd_address".
	regex i2cPattern("((i2c)-[0-9]+\\/)([0-9]+-[0-9]{4})");
	smatch match;
	if (regex_search(file, match, i2cPattern))
	{
	i2cBusAddr = match.str(3);
	}
	else
	{
	cerr << "The given udev path < " << file
	<< " > doesn't match the required pattern. Skipping VPD "
	"collection."
	<< endl;
	exit(EXIT_SUCCESS);
	}
	// Forming the generic file path
	file = i2cPathPrefix + i2cBusAddr + "/eeprom";
	}
	// Sample udevEvent spi path :
	// "/sys/devices/platform/ahb/ahb:apb/1e79b000.fsi/fsi-master/fsi0/slave@00:00/00:00:00:04/spi_master/spi2/spi2.0/spi2.00/nvmem"
	// find if the path contains the word spi in it.
	else if (file.find("spi") != string::npos)
	{
	// Every udev spi path will have common pattern "spi<Digit>/", which
	// describes the spi bus number at which the fru is connected; Followed
	// by a slash following the vpd address of the fru. Taking the above
	// input as a common key, we try to search for the pattern "spi<Digit>/"
	// using regular expression.
	regex spiPattern("((spi)[0-9]+)(\\/)");
	string spiBus{};
	smatch match;
	if (regex_search(file, match, spiPattern))
	{
	spiBus = match.str(1);
	}
	else
	{
	cerr << "The given udev path < " << file
	<< " > doesn't match the required pattern. Skipping VPD "
	"collection."
	<< endl;
	exit(EXIT_SUCCESS);
	}
	// Forming the generic path
	file = spiPathPrefix + spiBus + ".0/eeprom";
	}
	else
	{
	cerr << "\n The given EEPROM path < " << file
	<< " > is not valid. It's neither I2C nor "
	"SPI path. Skipping VPD collection.."
	<< endl;
	exit(EXIT_SUCCESS);
	}
	}
	string getBadVpdName(const string& file)
	{
	string badVpd = BAD_VPD_DIR;
	if (file.find("i2c") != string::npos)
	{
	badVpd += "i2c-";
	regex i2cPattern("(at24/)([0-9]+-[0-9]+)\\/");
	smatch match;
	if (regex_search(file, match, i2cPattern))
	{
	badVpd += match.str(2);
	}
	}
	else if (file.find("spi") != string::npos)
	{
	regex spiPattern("((spi)[0-9]+)(.0)");
	smatch match;
	if (regex_search(file, match, spiPattern))
	{
	badVpd += match.str(1);
	}
	}
	return badVpd;
	}

	void dumpBadVpd(const string& file, const Binary& vpdVector)
	{
	fs::path badVpdDir = BAD_VPD_DIR;
	fs::create_directory(badVpdDir);
	string badVpdPath = getBadVpdName(file);
	if (fs::exists(badVpdPath))
	{
	std::error_code ec;
	fs::remove(badVpdPath, ec);
	if (ec) // error code
	{
	string error = "Error removing the existing broken vpd in ";
	error += badVpdPath;
	error += ". Error code : ";
	error += ec.value();
	error += ". Error message : ";
	error += ec.message();
	throw runtime_error(error);
	}
	}
	ofstream badVpdFileStream(badVpdPath, ofstream::binary);
	if (!badVpdFileStream)
	{
	throw runtime_error("Failed to open bad vpd file path in /tmp/bad-vpd. "
	"Unable to dump the broken/bad vpd file.");
	}
	badVpdFileStream.write(reinterpret_cast<const char*>(vpdVector.data()),
	vpdVector.size());
	}

	const string getKwVal(const Parsed& vpdMap, const string& rec,
	const string& kwd)
	{
	string kwVal{};

	auto findRec = vpdMap.find(rec);

	// check if record is found in map we got by parser
	if (findRec != vpdMap.end())
	{
	auto findKwd = findRec->second.find(kwd);

	if (findKwd != findRec->second.end())
	{
	kwVal = findKwd->second;
	}
	}

	return kwVal;
	}

	} // namespace vpd
	} // namespace openpower