writefrudata.cpp - openbmc/ipmi-fru-parser - Gitiles

 #include "writefrudata.hpp"

 #include "fru_area.hpp"
 #include "frup.hpp"
 #include "types.hpp"

 #include <host-ipmid/ipmid-api.h>
 #include <systemd/sd-bus.h>
 #include <unistd.h>

 #include <algorithm>
 #include <cstdio>
 #include <cstring>
 #include <exception>
 #include <fstream>
 #include <iostream>
 #include <map>
 #include <memory>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/bus.hpp>
 #include <sstream>
 #include <vector>

 using namespace ipmi::vpd;
 using namespace phosphor::logging;

 extern const FruMap frus;
 extern const std::map<Path, InterfaceMap> extras;

 using FruAreaVector = std::vector<std::unique_ptr<IPMIFruArea>>;

 namespace
 {

 //------------------------------------------------------------
 // Cleanup routine
 // Must always be called as last reference to fru_fp.
 //------------------------------------------------------------
 int cleanupError(FILE* fru_fp, FruAreaVector& fru_area_vec)
 {
     if (fru_fp != NULL)
     {
         std::fclose(fru_fp);
     }

     if (!(fru_area_vec.empty()))
     {
         fru_area_vec.clear();
     }

     return -1;
 }

 //------------------------------------------------------------------------
 // Gets the value of the key from the fru dictionary of the given section.
 // FRU dictionary is parsed fru data for all the sections.
 //------------------------------------------------------------------------
 std::string getFRUValue(const std::string& section, const std::string& key,
                         const std::string& delimiter, IPMIFruInfo& fruData)
 {

     auto minIndexValue = 0;
     auto maxIndexValue = 0;
     std::string fruValue = "";

     if (section == "Board")
     {
         minIndexValue = OPENBMC_VPD_KEY_BOARD_MFG_DATE;
         maxIndexValue = OPENBMC_VPD_KEY_BOARD_MAX;
     }
     else if (section == "Product")
     {
         minIndexValue = OPENBMC_VPD_KEY_PRODUCT_MFR;
         maxIndexValue = OPENBMC_VPD_KEY_PRODUCT_MAX;
     }
     else if (section == "Chassis")
     {
         minIndexValue = OPENBMC_VPD_KEY_CHASSIS_TYPE;
         maxIndexValue = OPENBMC_VPD_KEY_CHASSIS_MAX;
     }

     auto first = fruData.cbegin() + minIndexValue;
     auto last = first + (maxIndexValue - minIndexValue) + 1;

     auto itr =
         std::find_if(first, last, [&key](auto& e) { return key == e.first; });

     if (itr != last)
     {
         fruValue = itr->second;
     }

     // if the key is custom property then the value could be in two formats.
     // 1) custom field 2 = "value".
     // 2) custom field 2 =  "key:value".
     // if delimiter length = 0 i.e custom field 2 = "value"

     constexpr auto customProp = "Custom Field";
     if (key.find(customProp) != std::string::npos)
     {
         if (delimiter.length() > 0)
         {
             size_t delimiterpos = fruValue.find(delimiter);
             if (delimiterpos != std::string::npos)
                 fruValue = fruValue.substr(delimiterpos + 1);
         }
     }
     return fruValue;
 }

 // Get the inventory service from the mapper.
 auto getService(sdbusplus::bus::bus& bus, const std::string& intf,
                 const std::string& path)
 {
     auto mapperCall =
         bus.new_method_call("xyz.openbmc_project.ObjectMapper",
                             "/xyz/openbmc_project/object_mapper",
                             "xyz.openbmc_project.ObjectMapper", "GetObject");

     mapperCall.append(path);
     mapperCall.append(std::vector<std::string>({intf}));
     std::map<std::string, std::vector<std::string>> mapperResponse;

     try
     {
         auto mapperResponseMsg = bus.call(mapperCall);
         mapperResponseMsg.read(mapperResponse);
     }
     catch (const sdbusplus::exception::SdBusError& ex)
     {
         log<level::ERR>("Exception from sdbus call",
                         entry("WHAT=%s", ex.what()));
         throw;
     }

     if (mapperResponse.begin() == mapperResponse.end())
     {
         throw std::runtime_error("ERROR in reading the mapper response");
     }

     return mapperResponse.begin()->first;
 }

 // Takes FRU data, invokes Parser for each fru record area and updates
 // Inventory
 //------------------------------------------------------------------------
 int updateInventory(FruAreaVector& area_vec, sd_bus* bus_sd)
 {
     // Generic error reporter
     int rc = 0;
     uint8_t fruid = 0;
     IPMIFruInfo fruData;

     // For each FRU area, extract the needed data , get it parsed and update
     // the Inventory.
     for (const auto& fruArea : area_vec)
     {
         fruid = fruArea->get_fruid();
         // Fill the container with information
         rc = parse_fru_area((fruArea)->get_type(), (void*)(fruArea)->get_data(),
                             (fruArea)->get_len(), fruData);
         if (rc < 0)
         {
             log<level::ERR>("Error parsing FRU records");
             return rc;
         }
     } // END walking the vector of areas and updating

     // For each Fru we have the list of instances which needs to be updated.
     // Each instance object implements certain interfaces.
     // Each Interface is having Dbus properties.
     // Each Dbus Property would be having metaData(eg section,VpdPropertyName).

     // Here we are just printing the object,interface and the properties.
     // which needs to be called with the new inventory manager implementation.
     sdbusplus::bus::bus bus{bus_sd};
     using namespace std::string_literals;
     static const auto intf = "xyz.openbmc_project.Inventory.Manager"s;
     static const auto path = "/xyz/openbmc_project/inventory"s;
     std::string service;
     try
     {
         service = getService(bus, intf, path);
     }
     catch (const std::exception& e)
     {
         std::cerr << e.what() << "\n";
         return -1;
     }

     auto iter = frus.find(fruid);
     if (iter == frus.end())
     {
         log<level::ERR>("Unable to get the fru info",
                         entry("FRU=%d", static_cast<int>(fruid)));
         return -1;
     }

     auto& instanceList = iter->second;
     if (instanceList.size() <= 0)
     {
         log<level::DEBUG>("Object list empty for this FRU",
                           entry("FRU=%d", static_cast<int>(fruid)));
     }

     ObjectMap objects;
     for (auto& instance : instanceList)
     {
         InterfaceMap interfaces;
         const auto& extrasIter = extras.find(instance.path);

         for (auto& interfaceList : instance.interfaces)
         {
             PropertyMap props; // store all the properties
             for (auto& properties : interfaceList.second)
             {
                 std::string value;
                 decltype(auto) pdata = properties.second;

                 if (!pdata.section.empty() && !pdata.property.empty())
                 {
                     value = getFRUValue(pdata.section, pdata.property,
                                         pdata.delimiter, fruData);
                 }
                 props.emplace(std::move(properties.first), std::move(value));
             }
             // Check and update extra properties
             if (extras.end() != extrasIter)
             {
                 const auto& propsIter =
                     (extrasIter->second).find(interfaceList.first);
                 if ((extrasIter->second).end() != propsIter)
                 {
                     for (const auto& map : propsIter->second)
                     {
                         props.emplace(map.first, map.second);
                     }
                 }
             }
             interfaces.emplace(std::move(interfaceList.first),
                                std::move(props));
         }

         // Call the inventory manager
         sdbusplus::message::object_path objectPath = instance.path;
         // Check and update extra properties
         if (extras.end() != extrasIter)
         {
             for (const auto& entry : extrasIter->second)
             {
                 if (interfaces.end() == interfaces.find(entry.first))
                 {
                     interfaces.emplace(entry.first, entry.second);
                 }
             }
         }
         objects.emplace(objectPath, interfaces);
     }

     auto pimMsg = bus.new_method_call(service.c_str(), path.c_str(),
                                       intf.c_str(), "Notify");
     pimMsg.append(std::move(objects));

     try
     {
         auto inventoryMgrResponseMsg = bus.call(pimMsg);
     }
     catch (const sdbusplus::exception::SdBusError& ex)
     {
         log<level::ERR>("Error in notify call", entry("WHAT=%s", ex.what()));
         return -1;
     }

     return rc;
 }

 } // namespace

 //------------------------------------------------
 // Takes the pointer to stream of bytes and length
 // and returns the 8 bit checksum
 // This algo is per IPMI V2.0 spec
 //-------------------------------------------------
 unsigned char calculate_crc(const unsigned char* data, size_t len)
 {
     char crc = 0;
     size_t byte = 0;

     for (byte = 0; byte < len; byte++)
     {
         crc += *data++;
     }

     return (-crc);
 }

 //---------------------------------------------------------------------
 // Accepts a fru area offset in commom hdr and tells which area it is.
 //---------------------------------------------------------------------
 ipmi_fru_area_type get_fru_area_type(uint8_t area_offset)
 {
     ipmi_fru_area_type type = IPMI_FRU_AREA_TYPE_MAX;

     switch (area_offset)
     {
         case IPMI_FRU_INTERNAL_OFFSET:
             type = IPMI_FRU_AREA_INTERNAL_USE;
             break;

         case IPMI_FRU_CHASSIS_OFFSET:
             type = IPMI_FRU_AREA_CHASSIS_INFO;
             break;

         case IPMI_FRU_BOARD_OFFSET:
             type = IPMI_FRU_AREA_BOARD_INFO;
             break;

         case IPMI_FRU_PRODUCT_OFFSET:
             type = IPMI_FRU_AREA_PRODUCT_INFO;
             break;

         case IPMI_FRU_MULTI_OFFSET:
             type = IPMI_FRU_AREA_MULTI_RECORD;
             break;

         default:
             type = IPMI_FRU_AREA_TYPE_MAX;
     }

     return type;
 }

 ///-----------------------------------------------
 // Validates the data for crc and mandatory fields
 ///-----------------------------------------------
 int verify_fru_data(const uint8_t* data, const size_t len)
 {
     uint8_t checksum = 0;
     int rc = -1;

     // Validate for first byte to always have a value of [1]
     if (data[0] != IPMI_FRU_HDR_BYTE_ZERO)
     {
         log<level::ERR>("Invalid entry in byte-0",
                         entry("ENTRY=0x%X", static_cast<uint32_t>(data[0])));
         return rc;
     }
 #ifdef __IPMI_DEBUG__
     else
     {
         log<level::DEBUG>("Validated in entry_1 of fru_data",
                           entry("ENTRY=0x%X", static_cast<uint32_t>(data[0])));
     }
 #endif

     // See if the calculated CRC matches with the embedded one.
     // CRC to be calculated on all except the last one that is CRC itself.
     checksum = calculate_crc(data, len - 1);
     if (checksum != data[len - 1])
     {
 #ifdef __IPMI_DEBUG__
         log<level::ERR>(
             "Checksum mismatch",
             entry("Calculated=0x%X", static_cast<uint32_t>(checksum)),
             entry("Embedded=0x%X", static_cast<uint32_t>(data[len])));
 #endif
         return rc;
     }
 #ifdef __IPMI_DEBUG__
     else
     {
         log<level::DEBUG>("Checksum matches");
     }
 #endif

     return EXIT_SUCCESS;
 }

 ///----------------------------------------------------
 // Checks if a particular fru area is populated or not
 ///----------------------------------------------------
 bool remove_invalid_area(const std::unique_ptr<IPMIFruArea>& fru_area)
 {
     // Filter the ones that are empty
     if (!(fru_area->get_len()))
     {
         return true;
     }
     return false;
 }

 ///----------------------------------------------------------------------------------
 // Populates various FRU areas
 // @prereq : This must be called only after validating common header.
 ///----------------------------------------------------------------------------------
 int ipmi_populate_fru_areas(uint8_t* fru_data, const size_t data_len,
                             FruAreaVector& fru_area_vec)
 {
     int rc = -1;

     // Now walk the common header and see if the file size has atleast the last
     // offset mentioned by the common_hdr. If the file size is less than the
     // offset of any if the fru areas mentioned in the common header, then we do
     // not have a complete file.
     for (uint8_t fru_entry = IPMI_FRU_INTERNAL_OFFSET;
          fru_entry < (sizeof(struct common_header) - 2); fru_entry++)
     {
         rc = -1;
         // Actual offset in the payload is the offset mentioned in common header
         // multiplied by 8. Common header is always the first 8 bytes.
         size_t area_offset = fru_data[fru_entry] * IPMI_EIGHT_BYTES;
         if (area_offset && (data_len < (area_offset + 2)))
         {
             // Our file size is less than what it needs to be. +2 because we are
             // using area len that is at 2 byte off area_offset
             log<level::ERR>("fru file is incomplete",
                             entry("SIZE=%d", data_len));
             return rc;
         }
         else if (area_offset)
         {
             // Read 2 bytes to know the actual size of area.
             uint8_t area_hdr[2] = {0};
             std::memcpy(area_hdr, &((uint8_t*)fru_data)[area_offset],
                         sizeof(area_hdr));

             // Size of this area will be the 2nd byte in the fru area header.
             size_t area_len = area_hdr[1] * IPMI_EIGHT_BYTES;
             uint8_t area_data[area_len] = {0};

             log<level::DEBUG>("Fru Data", entry("SIZE=%d", data_len),
                               entry("AREA OFFSET=%d", area_offset),
                               entry("AREA_SIZE=%d", area_len));

             // See if we really have that much buffer. We have area offset amd
             // from there, the actual len.
             if (data_len < (area_len + area_offset))
             {
                 log<level::ERR>("Incomplete Fru file",
                                 entry("SIZE=%d", data_len));
                 return rc;
             }

             // Save off the data.
             std::memcpy(area_data, &((uint8_t*)fru_data)[area_offset],
                         area_len);

             // Validate the crc
             rc = verify_fru_data(area_data, area_len);
             if (rc < 0)
             {
                 log<level::ERR>("Err validating fru area",
                                 entry("OFFSET=%d", area_offset));
                 return rc;
             }
             else
             {
                 log<level::DEBUG>("Successfully verified area checksum.",
                                   entry("OFFSET=%d", area_offset));
             }

             // We already have a vector that is passed to us containing all
             // of the fields populated. Update the data portion now.
             for (auto& iter : fru_area_vec)
             {
                 if ((iter)->get_type() == get_fru_area_type(fru_entry))
                 {
                     (iter)->set_data(area_data, area_len);
                 }
             }
         } // If we have fru data present
     }     // Walk common_hdr

     // Not all the fields will be populated in a fru data. Mostly all cases will
     // not have more than 2 or 3.
     fru_area_vec.erase(std::remove_if(fru_area_vec.begin(), fru_area_vec.end(),
                                       remove_invalid_area),
                        fru_area_vec.end());

     return EXIT_SUCCESS;
 }

 ///---------------------------------------------------------
 // Validates the fru data per ipmi common header constructs.
 // Returns with updated common_hdr and also file_size
 //----------------------------------------------------------
 int ipmi_validate_common_hdr(const uint8_t* fru_data, const size_t data_len)
 {
     int rc = -1;

     uint8_t common_hdr[sizeof(struct common_header)] = {0};
     if (data_len >= sizeof(common_hdr))
     {
         std::memcpy(common_hdr, fru_data, sizeof(common_hdr));
     }
     else
     {
         log<level::ERR>("Incomplete fru data file", entry("SIZE=%d", data_len));
         return rc;
     }

     // Verify the crc and size
     rc = verify_fru_data(common_hdr, sizeof(common_hdr));
     if (rc < 0)
     {
         log<level::ERR>("Failed to validate common header");
         return rc;
     }

     return EXIT_SUCCESS;
 }

 ///-----------------------------------------------------
 // Accepts the filename and validates per IPMI FRU spec
 //----------------------------------------------------
 int validateFRUArea(const uint8_t fruid, const char* fru_file_name,
                     sd_bus* bus_type, const bool bmc_fru)
 {
     size_t data_len = 0;
     size_t bytes_read = 0;
     int rc = -1;

     // Vector that holds individual IPMI FRU AREAs. Although MULTI and INTERNAL
     // are not used, keeping it here for completeness.
     FruAreaVector fru_area_vec;

     for (uint8_t fru_entry = IPMI_FRU_INTERNAL_OFFSET;
          fru_entry < (sizeof(struct common_header) - 2); fru_entry++)
     {
         // Create an object and push onto a vector.
         std::unique_ptr<IPMIFruArea> fru_area = std::make_unique<IPMIFruArea>(
             fruid, get_fru_area_type(fru_entry), bmc_fru);

         // Physically being present
         bool present = access(fru_file_name, F_OK) == 0;
         fru_area->set_present(present);

         fru_area_vec.emplace_back(std::move(fru_area));
     }

     FILE* fru_fp = std::fopen(fru_file_name, "rb");
     if (fru_fp == NULL)
     {
         log<level::ERR>("Unable to open fru file",
                         entry("FILE=%s", fru_file_name),
                         entry("ERRNO=%s", std::strerror(errno)));
         return cleanupError(fru_fp, fru_area_vec);
     }

     // Get the size of the file to see if it meets minimum requirement
     if (std::fseek(fru_fp, 0, SEEK_END))
     {
         log<level::ERR>("Unable to seek fru file",
                         entry("FILE=%s", fru_file_name),
                         entry("ERRNO=%s", std::strerror(errno)));
         return cleanupError(fru_fp, fru_area_vec);
     }

     // Allocate a buffer to hold entire file content
     data_len = std::ftell(fru_fp);
     uint8_t fru_data[data_len] = {0};

     std::rewind(fru_fp);
     bytes_read = std::fread(fru_data, data_len, 1, fru_fp);
     if (bytes_read != 1)
     {
         log<level::ERR>("Failed reading fru data.",
                         entry("BYTESREAD=%d", bytes_read),
                         entry("ERRNO=%s", std::strerror(errno)));
         return cleanupError(fru_fp, fru_area_vec);
     }

     // We are done reading.
     std::fclose(fru_fp);
     fru_fp = NULL;

     rc = ipmi_validate_common_hdr(fru_data, data_len);
     if (rc < 0)
     {
         return cleanupError(fru_fp, fru_area_vec);
     }

     // Now that we validated the common header, populate various fru sections if
     // we have them here.
     rc = ipmi_populate_fru_areas(fru_data, data_len, fru_area_vec);
     if (rc < 0)
     {
         log<level::ERR>("Populating FRU areas failed", entry("FRU=%d", fruid));
         return cleanupError(fru_fp, fru_area_vec);
     }
     else
     {
         log<level::DEBUG>("Populated FRU areas",
                           entry("FILE=%s", fru_file_name));
     }

 #ifdef __IPMI_DEBUG__
     for (auto& iter : fru_area_vec)
     {
         std::printf("FRU ID : [%d]\n", (iter)->get_fruid());
         std::printf("AREA NAME : [%s]\n", (iter)->get_name());
         std::printf("TYPE : [%d]\n", (iter)->get_type());
         std::printf("LEN : [%d]\n", (iter)->get_len());
         std::printf("BUS NAME : [%s]\n", (iter)->get_bus_name());
         std::printf("OBJ PATH : [%s]\n", (iter)->get_obj_path());
         std::printf("INTF NAME :[%s]\n", (iter)->get_intf_name());
     }
 #endif

     // If the vector is populated with everything, then go ahead and update the
     // inventory.
     if (!(fru_area_vec.empty()))
     {

 #ifdef __IPMI_DEBUG__
         std::printf("\n SIZE of vector is : [%d] \n", fru_area_vec.size());
 #endif
         rc = updateInventory(fru_area_vec, bus_type);
         if (rc < 0)
         {
             log<level::ERR>("Error updating inventory.");
         }
     }

     // we are done with all that we wanted to do. This will do the job of
     // calling any destructors too.
     fru_area_vec.clear();

     return rc;
 }
	#include "writefrudata.hpp"

	#include "fru_area.hpp"
	#include "frup.hpp"
	#include "types.hpp"

	#include <host-ipmid/ipmid-api.h>
	#include <systemd/sd-bus.h>
	#include <unistd.h>

	#include <algorithm>
	#include <cstdio>
	#include <cstring>
	#include <exception>
	#include <fstream>
	#include <iostream>
	#include <map>
	#include <memory>
	#include <phosphor-logging/log.hpp>
	#include <sdbusplus/bus.hpp>
	#include <sstream>
	#include <vector>

	using namespace ipmi::vpd;
	using namespace phosphor::logging;

	extern const FruMap frus;
	extern const std::map<Path, InterfaceMap> extras;

	using FruAreaVector = std::vector<std::unique_ptr<IPMIFruArea>>;

	namespace
	{

	//------------------------------------------------------------
	// Cleanup routine
	// Must always be called as last reference to fru_fp.
	//------------------------------------------------------------
	int cleanupError(FILE* fru_fp, FruAreaVector& fru_area_vec)
	{
	if (fru_fp != NULL)
	{
	std::fclose(fru_fp);
	}

	if (!(fru_area_vec.empty()))
	{
	fru_area_vec.clear();
	}

	return -1;
	}

	//------------------------------------------------------------------------
	// Gets the value of the key from the fru dictionary of the given section.
	// FRU dictionary is parsed fru data for all the sections.
	//------------------------------------------------------------------------
	std::string getFRUValue(const std::string& section, const std::string& key,
	const std::string& delimiter, IPMIFruInfo& fruData)
	{

	auto minIndexValue = 0;
	auto maxIndexValue = 0;
	std::string fruValue = "";

	if (section == "Board")
	{
	minIndexValue = OPENBMC_VPD_KEY_BOARD_MFG_DATE;
	maxIndexValue = OPENBMC_VPD_KEY_BOARD_MAX;
	}
	else if (section == "Product")
	{
	minIndexValue = OPENBMC_VPD_KEY_PRODUCT_MFR;
	maxIndexValue = OPENBMC_VPD_KEY_PRODUCT_MAX;
	}
	else if (section == "Chassis")
	{
	minIndexValue = OPENBMC_VPD_KEY_CHASSIS_TYPE;
	maxIndexValue = OPENBMC_VPD_KEY_CHASSIS_MAX;
	}

	auto first = fruData.cbegin() + minIndexValue;
	auto last = first + (maxIndexValue - minIndexValue) + 1;

	auto itr =
	std::find_if(first, last, [&key](auto& e) { return key == e.first; });

	if (itr != last)
	{
	fruValue = itr->second;
	}

	// if the key is custom property then the value could be in two formats.
	// 1) custom field 2 = "value".
	// 2) custom field 2 = "key:value".
	// if delimiter length = 0 i.e custom field 2 = "value"

	constexpr auto customProp = "Custom Field";
	if (key.find(customProp) != std::string::npos)
	{
	if (delimiter.length() > 0)
	{
	size_t delimiterpos = fruValue.find(delimiter);
	if (delimiterpos != std::string::npos)
	fruValue = fruValue.substr(delimiterpos + 1);
	}
	}
	return fruValue;
	}

	// Get the inventory service from the mapper.
	auto getService(sdbusplus::bus::bus& bus, const std::string& intf,
	const std::string& path)
	{
	auto mapperCall =
	bus.new_method_call("xyz.openbmc_project.ObjectMapper",
	"/xyz/openbmc_project/object_mapper",
	"xyz.openbmc_project.ObjectMapper", "GetObject");

	mapperCall.append(path);
	mapperCall.append(std::vector<std::string>({intf}));
	std::map<std::string, std::vector<std::string>> mapperResponse;

	try
	{
	auto mapperResponseMsg = bus.call(mapperCall);
	mapperResponseMsg.read(mapperResponse);
	}
	catch (const sdbusplus::exception::SdBusError& ex)
	{
	log<level::ERR>("Exception from sdbus call",
	entry("WHAT=%s", ex.what()));
	throw;
	}

	if (mapperResponse.begin() == mapperResponse.end())
	{
	throw std::runtime_error("ERROR in reading the mapper response");
	}

	return mapperResponse.begin()->first;
	}

	// Takes FRU data, invokes Parser for each fru record area and updates
	// Inventory
	//------------------------------------------------------------------------
	int updateInventory(FruAreaVector& area_vec, sd_bus* bus_sd)
	{
	// Generic error reporter
	int rc = 0;
	uint8_t fruid = 0;
	IPMIFruInfo fruData;

	// For each FRU area, extract the needed data , get it parsed and update
	// the Inventory.
	for (const auto& fruArea : area_vec)
	{
	fruid = fruArea->get_fruid();
	// Fill the container with information
	rc = parse_fru_area((fruArea)->get_type(), (void*)(fruArea)->get_data(),
	(fruArea)->get_len(), fruData);
	if (rc < 0)
	{
	log<level::ERR>("Error parsing FRU records");
	return rc;
	}
	} // END walking the vector of areas and updating

	// For each Fru we have the list of instances which needs to be updated.
	// Each instance object implements certain interfaces.
	// Each Interface is having Dbus properties.
	// Each Dbus Property would be having metaData(eg section,VpdPropertyName).

	// Here we are just printing the object,interface and the properties.
	// which needs to be called with the new inventory manager implementation.
	sdbusplus::bus::bus bus{bus_sd};
	using namespace std::string_literals;
	static const auto intf = "xyz.openbmc_project.Inventory.Manager"s;
	static const auto path = "/xyz/openbmc_project/inventory"s;
	std::string service;
	try
	{
	service = getService(bus, intf, path);
	}
	catch (const std::exception& e)
	{
	std::cerr << e.what() << "\n";
	return -1;
	}

	auto iter = frus.find(fruid);
	if (iter == frus.end())
	{
	log<level::ERR>("Unable to get the fru info",
	entry("FRU=%d", static_cast<int>(fruid)));
	return -1;
	}

	auto& instanceList = iter->second;
	if (instanceList.size() <= 0)
	{
	log<level::DEBUG>("Object list empty for this FRU",
	entry("FRU=%d", static_cast<int>(fruid)));
	}

	ObjectMap objects;
	for (auto& instance : instanceList)
	{
	InterfaceMap interfaces;
	const auto& extrasIter = extras.find(instance.path);

	for (auto& interfaceList : instance.interfaces)
	{
	PropertyMap props; // store all the properties
	for (auto& properties : interfaceList.second)
	{
	std::string value;
	decltype(auto) pdata = properties.second;

	if (!pdata.section.empty() && !pdata.property.empty())
	{
	value = getFRUValue(pdata.section, pdata.property,
	pdata.delimiter, fruData);
	}
	props.emplace(std::move(properties.first), std::move(value));
	}
	// Check and update extra properties
	if (extras.end() != extrasIter)
	{
	const auto& propsIter =
	(extrasIter->second).find(interfaceList.first);
	if ((extrasIter->second).end() != propsIter)
	{
	for (const auto& map : propsIter->second)
	{
	props.emplace(map.first, map.second);
	}
	}
	}
	interfaces.emplace(std::move(interfaceList.first),
	std::move(props));
	}

	// Call the inventory manager
	sdbusplus::message::object_path objectPath = instance.path;
	// Check and update extra properties
	if (extras.end() != extrasIter)
	{
	for (const auto& entry : extrasIter->second)
	{
	if (interfaces.end() == interfaces.find(entry.first))
	{
	interfaces.emplace(entry.first, entry.second);
	}
	}
	}
	objects.emplace(objectPath, interfaces);
	}

	auto pimMsg = bus.new_method_call(service.c_str(), path.c_str(),
	intf.c_str(), "Notify");
	pimMsg.append(std::move(objects));

	try
	{
	auto inventoryMgrResponseMsg = bus.call(pimMsg);
	}
	catch (const sdbusplus::exception::SdBusError& ex)
	{
	log<level::ERR>("Error in notify call", entry("WHAT=%s", ex.what()));
	return -1;
	}

	return rc;
	}

	} // namespace

	//------------------------------------------------
	// Takes the pointer to stream of bytes and length
	// and returns the 8 bit checksum
	// This algo is per IPMI V2.0 spec
	//-------------------------------------------------
	unsigned char calculate_crc(const unsigned char* data, size_t len)
	{
	char crc = 0;
	size_t byte = 0;

	for (byte = 0; byte < len; byte++)
	{
	crc += *data++;
	}

	return (-crc);
	}

	//---------------------------------------------------------------------
	// Accepts a fru area offset in commom hdr and tells which area it is.
	//---------------------------------------------------------------------
	ipmi_fru_area_type get_fru_area_type(uint8_t area_offset)
	{
	ipmi_fru_area_type type = IPMI_FRU_AREA_TYPE_MAX;

	switch (area_offset)
	{
	case IPMI_FRU_INTERNAL_OFFSET:
	type = IPMI_FRU_AREA_INTERNAL_USE;
	break;

	case IPMI_FRU_CHASSIS_OFFSET:
	type = IPMI_FRU_AREA_CHASSIS_INFO;
	break;

	case IPMI_FRU_BOARD_OFFSET:
	type = IPMI_FRU_AREA_BOARD_INFO;
	break;

	case IPMI_FRU_PRODUCT_OFFSET:
	type = IPMI_FRU_AREA_PRODUCT_INFO;
	break;

	case IPMI_FRU_MULTI_OFFSET:
	type = IPMI_FRU_AREA_MULTI_RECORD;
	break;

	default:
	type = IPMI_FRU_AREA_TYPE_MAX;
	}

	return type;
	}

	///-----------------------------------------------
	// Validates the data for crc and mandatory fields
	///-----------------------------------------------
	int verify_fru_data(const uint8_t* data, const size_t len)
	{
	uint8_t checksum = 0;
	int rc = -1;

	// Validate for first byte to always have a value of [1]
	if (data[0] != IPMI_FRU_HDR_BYTE_ZERO)
	{
	log<level::ERR>("Invalid entry in byte-0",
	entry("ENTRY=0x%X", static_cast<uint32_t>(data[0])));
	return rc;
	}
	#ifdef __IPMI_DEBUG__
	else
	{
	log<level::DEBUG>("Validated in entry_1 of fru_data",
	entry("ENTRY=0x%X", static_cast<uint32_t>(data[0])));
	}
	#endif

	// See if the calculated CRC matches with the embedded one.
	// CRC to be calculated on all except the last one that is CRC itself.
	checksum = calculate_crc(data, len - 1);
	if (checksum != data[len - 1])
	{
	#ifdef __IPMI_DEBUG__
	log<level::ERR>(
	"Checksum mismatch",
	entry("Calculated=0x%X", static_cast<uint32_t>(checksum)),
	entry("Embedded=0x%X", static_cast<uint32_t>(data[len])));
	#endif
	return rc;
	}
	#ifdef __IPMI_DEBUG__
	else
	{
	log<level::DEBUG>("Checksum matches");
	}
	#endif

	return EXIT_SUCCESS;
	}

	///----------------------------------------------------
	// Checks if a particular fru area is populated or not
	///----------------------------------------------------
	bool remove_invalid_area(const std::unique_ptr<IPMIFruArea>& fru_area)
	{
	// Filter the ones that are empty
	if (!(fru_area->get_len()))
	{
	return true;
	}
	return false;
	}

	///----------------------------------------------------------------------------------
	// Populates various FRU areas
	// @prereq : This must be called only after validating common header.
	///----------------------------------------------------------------------------------
	int ipmi_populate_fru_areas(uint8_t* fru_data, const size_t data_len,
	FruAreaVector& fru_area_vec)
	{
	int rc = -1;

	// Now walk the common header and see if the file size has atleast the last
	// offset mentioned by the common_hdr. If the file size is less than the
	// offset of any if the fru areas mentioned in the common header, then we do
	// not have a complete file.
	for (uint8_t fru_entry = IPMI_FRU_INTERNAL_OFFSET;
	fru_entry < (sizeof(struct common_header) - 2); fru_entry++)
	{
	rc = -1;
	// Actual offset in the payload is the offset mentioned in common header
	// multiplied by 8. Common header is always the first 8 bytes.
	size_t area_offset = fru_data[fru_entry] * IPMI_EIGHT_BYTES;
	if (area_offset && (data_len < (area_offset + 2)))
	{
	// Our file size is less than what it needs to be. +2 because we are
	// using area len that is at 2 byte off area_offset
	log<level::ERR>("fru file is incomplete",
	entry("SIZE=%d", data_len));
	return rc;
	}
	else if (area_offset)
	{
	// Read 2 bytes to know the actual size of area.
	uint8_t area_hdr[2] = {0};
	std::memcpy(area_hdr, &((uint8_t*)fru_data)[area_offset],
	sizeof(area_hdr));

	// Size of this area will be the 2nd byte in the fru area header.
	size_t area_len = area_hdr[1] * IPMI_EIGHT_BYTES;
	uint8_t area_data[area_len] = {0};

	log<level::DEBUG>("Fru Data", entry("SIZE=%d", data_len),
	entry("AREA OFFSET=%d", area_offset),
	entry("AREA_SIZE=%d", area_len));

	// See if we really have that much buffer. We have area offset amd
	// from there, the actual len.
	if (data_len < (area_len + area_offset))
	{
	log<level::ERR>("Incomplete Fru file",
	entry("SIZE=%d", data_len));
	return rc;
	}

	// Save off the data.
	std::memcpy(area_data, &((uint8_t*)fru_data)[area_offset],
	area_len);

	// Validate the crc
	rc = verify_fru_data(area_data, area_len);
	if (rc < 0)
	{
	log<level::ERR>("Err validating fru area",
	entry("OFFSET=%d", area_offset));
	return rc;
	}
	else
	{
	log<level::DEBUG>("Successfully verified area checksum.",
	entry("OFFSET=%d", area_offset));
	}

	// We already have a vector that is passed to us containing all
	// of the fields populated. Update the data portion now.
	for (auto& iter : fru_area_vec)
	{
	if ((iter)->get_type() == get_fru_area_type(fru_entry))
	{
	(iter)->set_data(area_data, area_len);
	}
	}
	} // If we have fru data present
	} // Walk common_hdr

	// Not all the fields will be populated in a fru data. Mostly all cases will
	// not have more than 2 or 3.
	fru_area_vec.erase(std::remove_if(fru_area_vec.begin(), fru_area_vec.end(),
	remove_invalid_area),
	fru_area_vec.end());

	return EXIT_SUCCESS;
	}

	///---------------------------------------------------------
	// Validates the fru data per ipmi common header constructs.
	// Returns with updated common_hdr and also file_size
	//----------------------------------------------------------
	int ipmi_validate_common_hdr(const uint8_t* fru_data, const size_t data_len)
	{
	int rc = -1;

	uint8_t common_hdr[sizeof(struct common_header)] = {0};
	if (data_len >= sizeof(common_hdr))
	{
	std::memcpy(common_hdr, fru_data, sizeof(common_hdr));
	}
	else
	{
	log<level::ERR>("Incomplete fru data file", entry("SIZE=%d", data_len));
	return rc;
	}

	// Verify the crc and size
	rc = verify_fru_data(common_hdr, sizeof(common_hdr));
	if (rc < 0)
	{
	log<level::ERR>("Failed to validate common header");
	return rc;
	}

	return EXIT_SUCCESS;
	}

	///-----------------------------------------------------
	// Accepts the filename and validates per IPMI FRU spec
	//----------------------------------------------------
	int validateFRUArea(const uint8_t fruid, const char* fru_file_name,
	sd_bus* bus_type, const bool bmc_fru)
	{
	size_t data_len = 0;
	size_t bytes_read = 0;
	int rc = -1;

	// Vector that holds individual IPMI FRU AREAs. Although MULTI and INTERNAL
	// are not used, keeping it here for completeness.
	FruAreaVector fru_area_vec;

	for (uint8_t fru_entry = IPMI_FRU_INTERNAL_OFFSET;
	fru_entry < (sizeof(struct common_header) - 2); fru_entry++)
	{
	// Create an object and push onto a vector.
	std::unique_ptr<IPMIFruArea> fru_area = std::make_unique<IPMIFruArea>(
	fruid, get_fru_area_type(fru_entry), bmc_fru);

	// Physically being present
	bool present = access(fru_file_name, F_OK) == 0;
	fru_area->set_present(present);

	fru_area_vec.emplace_back(std::move(fru_area));
	}

	FILE* fru_fp = std::fopen(fru_file_name, "rb");
	if (fru_fp == NULL)
	{
	log<level::ERR>("Unable to open fru file",
	entry("FILE=%s", fru_file_name),
	entry("ERRNO=%s", std::strerror(errno)));
	return cleanupError(fru_fp, fru_area_vec);
	}

	// Get the size of the file to see if it meets minimum requirement
	if (std::fseek(fru_fp, 0, SEEK_END))
	{
	log<level::ERR>("Unable to seek fru file",
	entry("FILE=%s", fru_file_name),
	entry("ERRNO=%s", std::strerror(errno)));
	return cleanupError(fru_fp, fru_area_vec);
	}

	// Allocate a buffer to hold entire file content
	data_len = std::ftell(fru_fp);
	uint8_t fru_data[data_len] = {0};

	std::rewind(fru_fp);
	bytes_read = std::fread(fru_data, data_len, 1, fru_fp);
	if (bytes_read != 1)
	{
	log<level::ERR>("Failed reading fru data.",
	entry("BYTESREAD=%d", bytes_read),
	entry("ERRNO=%s", std::strerror(errno)));
	return cleanupError(fru_fp, fru_area_vec);
	}

	// We are done reading.
	std::fclose(fru_fp);
	fru_fp = NULL;

	rc = ipmi_validate_common_hdr(fru_data, data_len);
	if (rc < 0)
	{
	return cleanupError(fru_fp, fru_area_vec);
	}

	// Now that we validated the common header, populate various fru sections if
	// we have them here.
	rc = ipmi_populate_fru_areas(fru_data, data_len, fru_area_vec);
	if (rc < 0)
	{
	log<level::ERR>("Populating FRU areas failed", entry("FRU=%d", fruid));
	return cleanupError(fru_fp, fru_area_vec);
	}
	else
	{
	log<level::DEBUG>("Populated FRU areas",
	entry("FILE=%s", fru_file_name));
	}

	#ifdef __IPMI_DEBUG__
	for (auto& iter : fru_area_vec)
	{
	std::printf("FRU ID : [%d]\n", (iter)->get_fruid());
	std::printf("AREA NAME : [%s]\n", (iter)->get_name());
	std::printf("TYPE : [%d]\n", (iter)->get_type());
	std::printf("LEN : [%d]\n", (iter)->get_len());
	std::printf("BUS NAME : [%s]\n", (iter)->get_bus_name());
	std::printf("OBJ PATH : [%s]\n", (iter)->get_obj_path());
	std::printf("INTF NAME :[%s]\n", (iter)->get_intf_name());
	}
	#endif

	// If the vector is populated with everything, then go ahead and update the
	// inventory.
	if (!(fru_area_vec.empty()))
	{

	#ifdef __IPMI_DEBUG__
	std::printf("\n SIZE of vector is : [%d] \n", fru_area_vec.size());
	#endif
	rc = updateInventory(fru_area_vec, bus_type);
	if (rc < 0)
	{
	log<level::ERR>("Error updating inventory.");
	}
	}

	// we are done with all that we wanted to do. This will do the job of
	// calling any destructors too.
	fru_area_vec.clear();

	return rc;
	}