storagehandler.cpp - openbmc/phosphor-host-ipmid - Gitiles

 #include <cstdio>
 #include <string>
 #include <arpa/inet.h>
 #include <systemd/sd-bus.h>
 #include <mapper.h>
 #include <chrono>
 #include "selutility.hpp"
 #include "storagehandler.h"
 #include "storageaddsel.h"
 #include "utils.hpp"
 #include "host-ipmid/ipmid-api.h"
 #include <experimental/filesystem>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/server.hpp>
 #include "xyz/openbmc_project/Common/error.hpp"

 void register_netfn_storage_functions() __attribute__((constructor));


 unsigned int   g_sel_time    = 0xFFFFFFFF;
 extern unsigned short g_sel_reserve;

 constexpr auto time_manager_intf = "org.openbmc.TimeManager";
 constexpr auto time_manager_obj = "/org/openbmc/TimeManager";

 namespace cache
 {
     /*
      * This cache contains the object paths of the logging entries sorted in the
      * order of the filename(numeric order). The cache is initialized by
      * invoking readLoggingObjectPaths with the cache as the parameter. The
      * cache is invoked in the execution of the Get SEL info and Delete SEL
      * entry command. The Get SEL Info command is typically invoked before the
      * Get SEL entry command, so the cache is utilized for responding to Get SEL
      * entry command. The cache is invalidated by clearing after Delete SEL
      * entry and Clear SEL command.
      */
     ipmi::sel::ObjectPaths paths;

 } // namespace objectPathsCache

 using InternalFailure =
         sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
 using namespace phosphor::logging;

 ipmi_ret_t ipmi_storage_wildcard(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     printf("Handling STORAGE WILDCARD Netfn:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
     // Status code.
     ipmi_ret_t rc = IPMI_CC_INVALID;
     *data_len = 0;
     return rc;
 }

 ipmi_ret_t getSELInfo(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                       ipmi_request_t request, ipmi_response_t response,
                       ipmi_data_len_t data_len, ipmi_context_t context)
 {
     std::vector<uint8_t> outPayload(sizeof(ipmi::sel::GetSELInfoResponse));
     auto responseData = reinterpret_cast<ipmi::sel::GetSELInfoResponse*>
             (outPayload.data());

     responseData->selVersion = ipmi::sel::selVersion;
     // Last erase timestamp is not available from log manager.
     responseData->eraseTimeStamp = ipmi::sel::invalidTimeStamp;
     responseData->operationSupport = ipmi::sel::operationSupport;

     ipmi::sel::readLoggingObjectPaths(cache::paths);
     responseData->entries = 0;
     responseData->addTimeStamp = ipmi::sel::invalidTimeStamp;

     if (!cache::paths.empty())
     {
         responseData->entries = static_cast<uint16_t>(cache::paths.size());

         try
         {
             responseData->addTimeStamp = static_cast<uint32_t>(
                     (ipmi::sel::getEntryTimeStamp(cache::paths.back())
                     .count()));
         }
         catch (InternalFailure& e)
         {
         }
         catch (const std::runtime_error& e)
         {
             log<level::ERR>(e.what());
         }
     }

     memcpy(response, outPayload.data(), outPayload.size());
     *data_len = outPayload.size();

     return IPMI_CC_OK;
 }

 ipmi_ret_t getSELEntry(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                        ipmi_request_t request, ipmi_response_t response,
                        ipmi_data_len_t data_len, ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const ipmi::sel::GetSELEntryRequest*>
                    (request);

     if (requestData->reservationID != 0)
     {
         if (g_sel_reserve != requestData->reservationID)
         {
             *data_len = 0;
             return IPMI_CC_INVALID_RESERVATION_ID;
         }
     }

     if (cache::paths.empty())
     {
         *data_len = 0;
         return IPMI_CC_SENSOR_INVALID;
     }

     ipmi::sel::ObjectPaths::const_iterator iter;

     // Check for the requested SEL Entry.
     if (requestData->selRecordID == ipmi::sel::firstEntry)
     {
         iter = cache::paths.begin();
     }
     else if (requestData->selRecordID == ipmi::sel::lastEntry)
     {
         iter = cache::paths.end();
     }
     else
     {
         std::string objPath = std::string(ipmi::sel::logBasePath) + "/" +
                               std::to_string(requestData->selRecordID);

         iter = std::find(cache::paths.begin(), cache::paths.end(), objPath);
         if (iter == cache::paths.end())
         {
             *data_len = 0;
             return IPMI_CC_SENSOR_INVALID;
         }
     }

     ipmi::sel::GetSELEntryResponse record {};

     // Convert the log entry into SEL record.
     try
     {
         record = ipmi::sel::convertLogEntrytoSEL(*iter);
     }
     catch (InternalFailure& e)
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }
     catch (const std::runtime_error& e)
     {
         log<level::ERR>(e.what());
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }


     // Identify the next SEL record ID
     if(iter != cache::paths.end())
     {
         ++iter;
         if (iter == cache::paths.end())
         {
             record.nextRecordID = ipmi::sel::lastEntry;
         }
         else
         {
             namespace fs = std::experimental::filesystem;
             fs::path path(*iter);
             record.nextRecordID = static_cast<uint16_t>
                      (std::stoul(std::string(path.filename().c_str())));
         }
     }
     else
     {
         record.nextRecordID = ipmi::sel::lastEntry;
     }

     if (requestData->readLength == ipmi::sel::entireRecord)
     {
         memcpy(response, &record, sizeof(record));
         *data_len = sizeof(record);
     }
     else
     {
         if (requestData->offset >= ipmi::sel::selRecordSize ||
             requestData->readLength > ipmi::sel::selRecordSize)
         {
             *data_len = 0;
             return IPMI_CC_INVALID_FIELD_REQUEST;
         }

         auto diff = ipmi::sel::selRecordSize - requestData->offset;
         auto readLength = std::min(diff,
                                    static_cast<int>(requestData->readLength));

         memcpy(response, &record.nextRecordID, sizeof(record.nextRecordID));
         memcpy(static_cast<uint8_t*>(response) + sizeof(record.nextRecordID),
                &record.recordID + requestData->offset, readLength);
         *data_len = sizeof(record.nextRecordID) + readLength;
     }

     return IPMI_CC_OK;
 }

 ipmi_ret_t deleteSELEntry(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                           ipmi_request_t request, ipmi_response_t response,
                           ipmi_data_len_t data_len, ipmi_context_t context)
 {
     namespace fs = std::experimental::filesystem;
     auto requestData = reinterpret_cast<const ipmi::sel::DeleteSELEntryRequest*>
             (request);

     if (g_sel_reserve != requestData->reservationID)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_RESERVATION_ID;
     }

     ipmi::sel::readLoggingObjectPaths(cache::paths);

     if (cache::paths.empty())
     {
         *data_len = 0;
         return IPMI_CC_SENSOR_INVALID;
     }

     ipmi::sel::ObjectPaths::const_iterator iter;
     uint16_t delRecordID = 0;

     if (requestData->selRecordID == ipmi::sel::firstEntry)
     {
         iter = cache::paths.begin();
         fs::path path(*iter);
         delRecordID = static_cast<uint16_t>
                 (std::stoul(std::string(path.filename().c_str())));
     }
     else if (requestData->selRecordID == ipmi::sel::lastEntry)
     {
         iter = cache::paths.end();
         fs::path path(*iter);
         delRecordID = static_cast<uint16_t>
                 (std::stoul(std::string(path.filename().c_str())));
     }
     else
     {
         std::string objPath = std::string(ipmi::sel::logBasePath) + "/" +
                               std::to_string(requestData->selRecordID);

         iter = std::find(cache::paths.begin(), cache::paths.end(), objPath);
         if (iter == cache::paths.end())
         {
             *data_len = 0;
             return IPMI_CC_SENSOR_INVALID;
         }
         delRecordID = requestData->selRecordID;
     }

     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
     std::string service;

     try
     {
         service = ipmi::getService(bus, ipmi::sel::logDeleteIntf, *iter);
     }
     catch (const std::runtime_error& e)
     {
         log<level::ERR>(e.what());
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     auto methodCall = bus.new_method_call(service.c_str(),
                                           (*iter).c_str(),
                                           ipmi::sel::logDeleteIntf,
                                           "Delete");
     auto reply = bus.call(methodCall);
     if (reply.is_method_error())
     {
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     // Invalidate the cache of dbus entry objects.
     cache::paths.clear();
     memcpy(response, &delRecordID, sizeof(delRecordID));
     *data_len = sizeof(delRecordID);

     return IPMI_CC_OK;
 }

 ipmi_ret_t clearSEL(ipmi_netfn_t netfn, ipmi_cmd_t cmd, ipmi_request_t request,
                     ipmi_response_t response, ipmi_data_len_t data_len,
                     ipmi_context_t context)
 {
     auto requestData = reinterpret_cast<const ipmi::sel::ClearSELRequest*>
             (request);

     if (g_sel_reserve != requestData->reservationID)
     {
         *data_len = 0;
         return IPMI_CC_INVALID_RESERVATION_ID;
     }

     if (requestData->charC != 'C' ||
         requestData->charL != 'L' ||
         requestData->charR != 'R')
     {
         *data_len = 0;
         return IPMI_CC_INVALID_FIELD_REQUEST;
     }

     uint8_t eraseProgress = ipmi::sel::eraseComplete;

     /*
      * Erasure status cannot be fetched from DBUS, so always return erasure
      * status as `erase completed`.
      */
     if (requestData->eraseOperation == ipmi::sel::getEraseStatus)
     {
         memcpy(response, &eraseProgress, sizeof(eraseProgress));
         *data_len = sizeof(eraseProgress);
         return IPMI_CC_OK;
     }

     sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
     auto depth = 0;

     auto mapperCall = bus.new_method_call(ipmi::sel::mapperBusName,
                                           ipmi::sel::mapperObjPath,
                                           ipmi::sel::mapperIntf,
                                           "GetSubTreePaths");
     mapperCall.append(ipmi::sel::logBasePath);
     mapperCall.append(depth);
     mapperCall.append(ipmi::sel::ObjectPaths({ipmi::sel::logEntryIntf}));

     auto reply = bus.call(mapperCall);
     if (reply.is_method_error())
     {
         memcpy(response, &eraseProgress, sizeof(eraseProgress));
         *data_len = sizeof(eraseProgress);
         return IPMI_CC_OK;
     }

     ipmi::sel::ObjectPaths objectPaths;
     reply.read(objectPaths);
     if (objectPaths.empty())
     {
         memcpy(response, &eraseProgress, sizeof(eraseProgress));
         *data_len = sizeof(eraseProgress);
         return IPMI_CC_OK;
     }

     std::string service;

     try
     {
         service = ipmi::getService(bus,
                                    ipmi::sel::logDeleteIntf,
                                    objectPaths.front());
     }
     catch (const std::runtime_error& e)
     {
         log<level::ERR>(e.what());
         *data_len = 0;
         return IPMI_CC_UNSPECIFIED_ERROR;
     }

     for (const auto& iter : objectPaths)
     {
         auto methodCall = bus.new_method_call(service.c_str(),
                                               iter.c_str(),
                                               ipmi::sel::logDeleteIntf,
                                               "Delete");

         auto reply = bus.call(methodCall);
         if (reply.is_method_error())
         {
             *data_len = 0;
             return IPMI_CC_UNSPECIFIED_ERROR;
         }
     }

     // Invalidate the cache of dbus entry objects.
     cache::paths.clear();
     memcpy(response, &eraseProgress, sizeof(eraseProgress));
     *data_len = sizeof(eraseProgress);
     return IPMI_CC_OK;
 }

 ipmi_ret_t ipmi_storage_get_sel_time(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     using namespace std::chrono;

     char *time_provider = nullptr;
     const char* time_in_str = nullptr;
     uint64_t host_time_usec = 0;
     uint32_t resp = 0;
     ipmi_ret_t rc = IPMI_CC_OK;

     sd_bus_message *reply = nullptr;
     sd_bus_error bus_error = SD_BUS_ERROR_NULL;

     printf("IPMI Handling GET-SEL-TIME\n");

     auto bus = ipmid_get_sd_bus_connection();

     auto rct = mapper_get_service(bus, time_manager_obj, &time_provider);
     if (rct < 0) {
         printf("Error [%s] getting bus name for time provider\n",
             strerror(-rct));
         rc = IPMI_CC_UNSPECIFIED_ERROR;
         goto finish;
     }

     rct = sd_bus_call_method(bus,
                     time_provider,
                     time_manager_obj,
                     time_manager_intf,
                     "GetTime",
                     &bus_error,
                     &reply,
                     "s",
                     "host");
     if (rct < 0) {
         printf("Error [%s] getting time\n", strerror(-rct));
         rc = IPMI_CC_UNSPECIFIED_ERROR;
         goto finish;
     }

     rct = sd_bus_message_read(reply, "sx", &time_in_str, &host_time_usec);
     if (rct < 0) {
         fprintf(stderr, "Error [%s] parsing get-time response\n",
                 strerror(-rct));
         rc = IPMI_CC_UNSPECIFIED_ERROR;
         goto finish;
     }

     // Time is really long int but IPMI wants just uint32. This works okay until
     // the number of seconds since 1970 overflows uint32 size.. Still a whole
     // lot of time here to even think about that.
     resp = duration_cast<seconds>(microseconds(host_time_usec)).count();
     resp = htole32(resp);
     printf("Host Time read:[%s] :: [%d]\n", time_in_str, resp);

     // From the IPMI Spec 2.0, response should be a 32-bit value
     *data_len = sizeof(resp);

     // Pack the actual response
     memcpy(response, &resp, *data_len);

 finish:
     sd_bus_error_free(&bus_error);
     reply = sd_bus_message_unref(reply);
     free(time_provider);
     return rc;
 }

 ipmi_ret_t ipmi_storage_set_sel_time(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     char *time_provider = nullptr;
     int time_rc = 0;
     ipmi_ret_t rc = IPMI_CC_OK;

     sd_bus_message *reply = nullptr;
     sd_bus_error bus_error = SD_BUS_ERROR_NULL;

     uint32_t* secs = (uint32_t*)request;
     *data_len = 0;

     printf("Handling Set-SEL-Time:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
     printf("Data: 0x%X]\n",*secs);

     auto bus = ipmid_get_sd_bus_connection();

     auto rct = mapper_get_service(bus, time_manager_obj, &time_provider);
     if (rct < 0) {
         printf("Error [%s] getting bus name for time provider\n",
             strerror(-rct));
         rc = IPMI_CC_UNSPECIFIED_ERROR;
         goto finish;
     }

     rct = sd_bus_call_method(bus,
             time_provider,
             time_manager_obj,
             time_manager_intf,
             "SetTime",
             &bus_error,
             &reply,
             "ss",
             "host",
             std::to_string(le32toh(*secs)).c_str());

     if (rct < 0) {
         printf("Error [%s] setting time\n", strerror(-rct));
         rc = IPMI_CC_UNSPECIFIED_ERROR;
         goto finish;
     }

     rct = sd_bus_message_read(reply, "i", &time_rc);
     if (rct < 0) {
         fprintf(stderr, "Error [%s] parsing set-time response\n",
                 strerror(-rct));
         rc = IPMI_CC_UNSPECIFIED_ERROR;
         goto finish;
     }

     if (time_rc < 0) {
         printf("Error setting time.");
         rc = IPMI_CC_UNSPECIFIED_ERROR;
     }

 finish:
     sd_bus_error_free(&bus_error);
     reply = sd_bus_message_unref(reply);
     free(time_provider);
     return rc;
 }

 ipmi_ret_t ipmi_storage_reserve_sel(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {
     ipmi_ret_t rc = IPMI_CC_OK;

     // IPMI spec, Reservation ID, the value simply increases against each execution of reserve_sel command.
     if( ++g_sel_reserve == 0)
         g_sel_reserve = 1;

     printf("IPMI Handling RESERVE-SEL 0x%04x\n", g_sel_reserve);

     *data_len = sizeof(g_sel_reserve);

     // Pack the actual response
     memcpy(response, &g_sel_reserve, *data_len);

     return rc;
 }

 ipmi_ret_t ipmi_storage_add_sel(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
                               ipmi_request_t request, ipmi_response_t response,
                               ipmi_data_len_t data_len, ipmi_context_t context)
 {

     ipmi_ret_t rc = IPMI_CC_OK;
     ipmi_add_sel_request_t *p = (ipmi_add_sel_request_t*) request;
     uint16_t recordid;

     recordid = ((uint16_t)p->eventdata[1] << 8) | p->eventdata[2];

     printf("IPMI Handling ADD-SEL for record 0x%04x\n", recordid);

     *data_len = sizeof(g_sel_reserve);

     // Pack the actual response
     memcpy(response, &p->eventdata[1], 2);

     send_esel(recordid);

     return rc;
 }


 void register_netfn_storage_functions()
 {
     // <Wildcard Command>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_WILDCARD);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_WILDCARD, NULL, ipmi_storage_wildcard,
                            PRIVILEGE_USER);

     // <Get SEL Info>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_GET_SEL_INFO);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_GET_SEL_INFO, NULL, getSELInfo,
                            PRIVILEGE_USER);

     // <Get SEL Time>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_GET_SEL_TIME);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_GET_SEL_TIME, NULL, ipmi_storage_get_sel_time,
                            PRIVILEGE_USER);

     // <Set SEL Time>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_SET_SEL_TIME);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_SET_SEL_TIME, NULL, ipmi_storage_set_sel_time,
                            PRIVILEGE_OPERATOR);

     // <Reserve SEL>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_RESERVE_SEL);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_RESERVE_SEL, NULL, ipmi_storage_reserve_sel,
                            PRIVILEGE_USER);

     // <Get SEL Entry>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_GET_SEL_ENTRY);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_GET_SEL_ENTRY, NULL, getSELEntry,
                            PRIVILEGE_USER);

     // <Delete SEL Entry>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_DELETE_SEL);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_DELETE_SEL, NULL, deleteSELEntry,
                            PRIVILEGE_OPERATOR);

     // <Add SEL Entry>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_ADD_SEL);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_ADD_SEL, NULL, ipmi_storage_add_sel,
                            PRIVILEGE_OPERATOR);

     // <Clear SEL>
     printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_CLEAR_SEL);
     ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_CLEAR_SEL, NULL, clearSEL,
                            PRIVILEGE_OPERATOR);
     return;
 }
	#include <cstdio>
	#include <string>
	#include <arpa/inet.h>
	#include <systemd/sd-bus.h>
	#include <mapper.h>
	#include <chrono>
	#include "selutility.hpp"
	#include "storagehandler.h"
	#include "storageaddsel.h"
	#include "utils.hpp"
	#include "host-ipmid/ipmid-api.h"
	#include <experimental/filesystem>
	#include <phosphor-logging/log.hpp>
	#include <sdbusplus/server.hpp>
	#include "xyz/openbmc_project/Common/error.hpp"

	void register_netfn_storage_functions() __attribute__((constructor));


	unsigned int g_sel_time = 0xFFFFFFFF;
	extern unsigned short g_sel_reserve;

	constexpr auto time_manager_intf = "org.openbmc.TimeManager";
	constexpr auto time_manager_obj = "/org/openbmc/TimeManager";

	namespace cache
	{
	/*
	* This cache contains the object paths of the logging entries sorted in the
	* order of the filename(numeric order). The cache is initialized by
	* invoking readLoggingObjectPaths with the cache as the parameter. The
	* cache is invoked in the execution of the Get SEL info and Delete SEL
	* entry command. The Get SEL Info command is typically invoked before the
	* Get SEL entry command, so the cache is utilized for responding to Get SEL
	* entry command. The cache is invalidated by clearing after Delete SEL
	* entry and Clear SEL command.
	*/
	ipmi::sel::ObjectPaths paths;

	} // namespace objectPathsCache

	using InternalFailure =
	sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
	using namespace phosphor::logging;

	ipmi_ret_t ipmi_storage_wildcard(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	printf("Handling STORAGE WILDCARD Netfn:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
	// Status code.
	ipmi_ret_t rc = IPMI_CC_INVALID;
	*data_len = 0;
	return rc;
	}

	ipmi_ret_t getSELInfo(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	std::vector<uint8_t> outPayload(sizeof(ipmi::sel::GetSELInfoResponse));
	auto responseData = reinterpret_cast<ipmi::sel::GetSELInfoResponse*>
	(outPayload.data());

	responseData->selVersion = ipmi::sel::selVersion;
	// Last erase timestamp is not available from log manager.
	responseData->eraseTimeStamp = ipmi::sel::invalidTimeStamp;
	responseData->operationSupport = ipmi::sel::operationSupport;

	ipmi::sel::readLoggingObjectPaths(cache::paths);
	responseData->entries = 0;
	responseData->addTimeStamp = ipmi::sel::invalidTimeStamp;

	if (!cache::paths.empty())
	{
	responseData->entries = static_cast<uint16_t>(cache::paths.size());

	try
	{
	responseData->addTimeStamp = static_cast<uint32_t>(
	(ipmi::sel::getEntryTimeStamp(cache::paths.back())
	.count()));
	}
	catch (InternalFailure& e)
	{
	}
	catch (const std::runtime_error& e)
	{
	log<level::ERR>(e.what());
	}
	}

	memcpy(response, outPayload.data(), outPayload.size());
	*data_len = outPayload.size();

	return IPMI_CC_OK;
	}

	ipmi_ret_t getSELEntry(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const ipmi::sel::GetSELEntryRequest*>
	(request);

	if (requestData->reservationID != 0)
	{
	if (g_sel_reserve != requestData->reservationID)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_RESERVATION_ID;
	}
	}

	if (cache::paths.empty())
	{
	*data_len = 0;
	return IPMI_CC_SENSOR_INVALID;
	}

	ipmi::sel::ObjectPaths::const_iterator iter;

	// Check for the requested SEL Entry.
	if (requestData->selRecordID == ipmi::sel::firstEntry)
	{
	iter = cache::paths.begin();
	}
	else if (requestData->selRecordID == ipmi::sel::lastEntry)
	{
	iter = cache::paths.end();
	}
	else
	{
	std::string objPath = std::string(ipmi::sel::logBasePath) + "/" +
	std::to_string(requestData->selRecordID);

	iter = std::find(cache::paths.begin(), cache::paths.end(), objPath);
	if (iter == cache::paths.end())
	{
	*data_len = 0;
	return IPMI_CC_SENSOR_INVALID;
	}
	}

	ipmi::sel::GetSELEntryResponse record {};

	// Convert the log entry into SEL record.
	try
	{
	record = ipmi::sel::convertLogEntrytoSEL(*iter);
	}
	catch (InternalFailure& e)
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	catch (const std::runtime_error& e)
	{
	log<level::ERR>(e.what());
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}


	// Identify the next SEL record ID
	if(iter != cache::paths.end())
	{
	++iter;
	if (iter == cache::paths.end())
	{
	record.nextRecordID = ipmi::sel::lastEntry;
	}
	else
	{
	namespace fs = std::experimental::filesystem;
	fs::path path(*iter);
	record.nextRecordID = static_cast<uint16_t>
	(std::stoul(std::string(path.filename().c_str())));
	}
	}
	else
	{
	record.nextRecordID = ipmi::sel::lastEntry;
	}

	if (requestData->readLength == ipmi::sel::entireRecord)
	{
	memcpy(response, &record, sizeof(record));
	*data_len = sizeof(record);
	}
	else
	{
	if (requestData->offset >= ipmi::sel::selRecordSize \|\|
	requestData->readLength > ipmi::sel::selRecordSize)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	auto diff = ipmi::sel::selRecordSize - requestData->offset;
	auto readLength = std::min(diff,
	static_cast<int>(requestData->readLength));

	memcpy(response, &record.nextRecordID, sizeof(record.nextRecordID));
	memcpy(static_cast<uint8_t*>(response) + sizeof(record.nextRecordID),
	&record.recordID + requestData->offset, readLength);
	*data_len = sizeof(record.nextRecordID) + readLength;
	}

	return IPMI_CC_OK;
	}

	ipmi_ret_t deleteSELEntry(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	namespace fs = std::experimental::filesystem;
	auto requestData = reinterpret_cast<const ipmi::sel::DeleteSELEntryRequest*>
	(request);

	if (g_sel_reserve != requestData->reservationID)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_RESERVATION_ID;
	}

	ipmi::sel::readLoggingObjectPaths(cache::paths);

	if (cache::paths.empty())
	{
	*data_len = 0;
	return IPMI_CC_SENSOR_INVALID;
	}

	ipmi::sel::ObjectPaths::const_iterator iter;
	uint16_t delRecordID = 0;

	if (requestData->selRecordID == ipmi::sel::firstEntry)
	{
	iter = cache::paths.begin();
	fs::path path(*iter);
	delRecordID = static_cast<uint16_t>
	(std::stoul(std::string(path.filename().c_str())));
	}
	else if (requestData->selRecordID == ipmi::sel::lastEntry)
	{
	iter = cache::paths.end();
	fs::path path(*iter);
	delRecordID = static_cast<uint16_t>
	(std::stoul(std::string(path.filename().c_str())));
	}
	else
	{
	std::string objPath = std::string(ipmi::sel::logBasePath) + "/" +
	std::to_string(requestData->selRecordID);

	iter = std::find(cache::paths.begin(), cache::paths.end(), objPath);
	if (iter == cache::paths.end())
	{
	*data_len = 0;
	return IPMI_CC_SENSOR_INVALID;
	}
	delRecordID = requestData->selRecordID;
	}

	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
	std::string service;

	try
	{
	service = ipmi::getService(bus, ipmi::sel::logDeleteIntf, *iter);
	}
	catch (const std::runtime_error& e)
	{
	log<level::ERR>(e.what());
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	auto methodCall = bus.new_method_call(service.c_str(),
	(*iter).c_str(),
	ipmi::sel::logDeleteIntf,
	"Delete");
	auto reply = bus.call(methodCall);
	if (reply.is_method_error())
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	// Invalidate the cache of dbus entry objects.
	cache::paths.clear();
	memcpy(response, &delRecordID, sizeof(delRecordID));
	*data_len = sizeof(delRecordID);

	return IPMI_CC_OK;
	}

	ipmi_ret_t clearSEL(ipmi_netfn_t netfn, ipmi_cmd_t cmd, ipmi_request_t request,
	ipmi_response_t response, ipmi_data_len_t data_len,
	ipmi_context_t context)
	{
	auto requestData = reinterpret_cast<const ipmi::sel::ClearSELRequest*>
	(request);

	if (g_sel_reserve != requestData->reservationID)
	{
	*data_len = 0;
	return IPMI_CC_INVALID_RESERVATION_ID;
	}

	if (requestData->charC != 'C' \|\|
	requestData->charL != 'L' \|\|
	requestData->charR != 'R')
	{
	*data_len = 0;
	return IPMI_CC_INVALID_FIELD_REQUEST;
	}

	uint8_t eraseProgress = ipmi::sel::eraseComplete;

	/*
	* Erasure status cannot be fetched from DBUS, so always return erasure
	* status as `erase completed`.
	*/
	if (requestData->eraseOperation == ipmi::sel::getEraseStatus)
	{
	memcpy(response, &eraseProgress, sizeof(eraseProgress));
	*data_len = sizeof(eraseProgress);
	return IPMI_CC_OK;
	}

	sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
	auto depth = 0;

	auto mapperCall = bus.new_method_call(ipmi::sel::mapperBusName,
	ipmi::sel::mapperObjPath,
	ipmi::sel::mapperIntf,
	"GetSubTreePaths");
	mapperCall.append(ipmi::sel::logBasePath);
	mapperCall.append(depth);
	mapperCall.append(ipmi::sel::ObjectPaths({ipmi::sel::logEntryIntf}));

	auto reply = bus.call(mapperCall);
	if (reply.is_method_error())
	{
	memcpy(response, &eraseProgress, sizeof(eraseProgress));
	*data_len = sizeof(eraseProgress);
	return IPMI_CC_OK;
	}

	ipmi::sel::ObjectPaths objectPaths;
	reply.read(objectPaths);
	if (objectPaths.empty())
	{
	memcpy(response, &eraseProgress, sizeof(eraseProgress));
	*data_len = sizeof(eraseProgress);
	return IPMI_CC_OK;
	}

	std::string service;

	try
	{
	service = ipmi::getService(bus,
	ipmi::sel::logDeleteIntf,
	objectPaths.front());
	}
	catch (const std::runtime_error& e)
	{
	log<level::ERR>(e.what());
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}

	for (const auto& iter : objectPaths)
	{
	auto methodCall = bus.new_method_call(service.c_str(),
	iter.c_str(),
	ipmi::sel::logDeleteIntf,
	"Delete");

	auto reply = bus.call(methodCall);
	if (reply.is_method_error())
	{
	*data_len = 0;
	return IPMI_CC_UNSPECIFIED_ERROR;
	}
	}

	// Invalidate the cache of dbus entry objects.
	cache::paths.clear();
	memcpy(response, &eraseProgress, sizeof(eraseProgress));
	*data_len = sizeof(eraseProgress);
	return IPMI_CC_OK;
	}

	ipmi_ret_t ipmi_storage_get_sel_time(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	using namespace std::chrono;

	char *time_provider = nullptr;
	const char* time_in_str = nullptr;
	uint64_t host_time_usec = 0;
	uint32_t resp = 0;
	ipmi_ret_t rc = IPMI_CC_OK;

	sd_bus_message *reply = nullptr;
	sd_bus_error bus_error = SD_BUS_ERROR_NULL;

	printf("IPMI Handling GET-SEL-TIME\n");

	auto bus = ipmid_get_sd_bus_connection();

	auto rct = mapper_get_service(bus, time_manager_obj, &time_provider);
	if (rct < 0) {
	printf("Error [%s] getting bus name for time provider\n",
	strerror(-rct));
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	goto finish;
	}

	rct = sd_bus_call_method(bus,
	time_provider,
	time_manager_obj,
	time_manager_intf,
	"GetTime",
	&bus_error,
	&reply,
	"s",
	"host");
	if (rct < 0) {
	printf("Error [%s] getting time\n", strerror(-rct));
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	goto finish;
	}

	rct = sd_bus_message_read(reply, "sx", &time_in_str, &host_time_usec);
	if (rct < 0) {
	fprintf(stderr, "Error [%s] parsing get-time response\n",
	strerror(-rct));
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	goto finish;
	}

	// Time is really long int but IPMI wants just uint32. This works okay until
	// the number of seconds since 1970 overflows uint32 size.. Still a whole
	// lot of time here to even think about that.
	resp = duration_cast<seconds>(microseconds(host_time_usec)).count();
	resp = htole32(resp);
	printf("Host Time read:[%s] :: [%d]\n", time_in_str, resp);

	// From the IPMI Spec 2.0, response should be a 32-bit value
	*data_len = sizeof(resp);

	// Pack the actual response
	memcpy(response, &resp, *data_len);

	finish:
	sd_bus_error_free(&bus_error);
	reply = sd_bus_message_unref(reply);
	free(time_provider);
	return rc;
	}

	ipmi_ret_t ipmi_storage_set_sel_time(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	char *time_provider = nullptr;
	int time_rc = 0;
	ipmi_ret_t rc = IPMI_CC_OK;

	sd_bus_message *reply = nullptr;
	sd_bus_error bus_error = SD_BUS_ERROR_NULL;

	uint32_t* secs = (uint32_t*)request;
	*data_len = 0;

	printf("Handling Set-SEL-Time:[0x%X], Cmd:[0x%X]\n",netfn, cmd);
	printf("Data: 0x%X]\n",*secs);

	auto bus = ipmid_get_sd_bus_connection();

	auto rct = mapper_get_service(bus, time_manager_obj, &time_provider);
	if (rct < 0) {
	printf("Error [%s] getting bus name for time provider\n",
	strerror(-rct));
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	goto finish;
	}

	rct = sd_bus_call_method(bus,
	time_provider,
	time_manager_obj,
	time_manager_intf,
	"SetTime",
	&bus_error,
	&reply,
	"ss",
	"host",
	std::to_string(le32toh(*secs)).c_str());

	if (rct < 0) {
	printf("Error [%s] setting time\n", strerror(-rct));
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	goto finish;
	}

	rct = sd_bus_message_read(reply, "i", &time_rc);
	if (rct < 0) {
	fprintf(stderr, "Error [%s] parsing set-time response\n",
	strerror(-rct));
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	goto finish;
	}

	if (time_rc < 0) {
	printf("Error setting time.");
	rc = IPMI_CC_UNSPECIFIED_ERROR;
	}

	finish:
	sd_bus_error_free(&bus_error);
	reply = sd_bus_message_unref(reply);
	free(time_provider);
	return rc;
	}

	ipmi_ret_t ipmi_storage_reserve_sel(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{
	ipmi_ret_t rc = IPMI_CC_OK;

	// IPMI spec, Reservation ID, the value simply increases against each execution of reserve_sel command.
	if( ++g_sel_reserve == 0)
	g_sel_reserve = 1;

	printf("IPMI Handling RESERVE-SEL 0x%04x\n", g_sel_reserve);

	*data_len = sizeof(g_sel_reserve);

	// Pack the actual response
	memcpy(response, &g_sel_reserve, *data_len);

	return rc;
	}

	ipmi_ret_t ipmi_storage_add_sel(ipmi_netfn_t netfn, ipmi_cmd_t cmd,
	ipmi_request_t request, ipmi_response_t response,
	ipmi_data_len_t data_len, ipmi_context_t context)
	{

	ipmi_ret_t rc = IPMI_CC_OK;
	ipmi_add_sel_request_t p = (ipmi_add_sel_request_t) request;
	uint16_t recordid;

	recordid = ((uint16_t)p->eventdata[1] << 8) \| p->eventdata[2];

	printf("IPMI Handling ADD-SEL for record 0x%04x\n", recordid);

	*data_len = sizeof(g_sel_reserve);

	// Pack the actual response
	memcpy(response, &p->eventdata[1], 2);

	send_esel(recordid);

	return rc;
	}



	void register_netfn_storage_functions()
	{
	// <Wildcard Command>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_WILDCARD);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_WILDCARD, NULL, ipmi_storage_wildcard,
	PRIVILEGE_USER);

	// <Get SEL Info>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_GET_SEL_INFO);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_GET_SEL_INFO, NULL, getSELInfo,
	PRIVILEGE_USER);

	// <Get SEL Time>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_GET_SEL_TIME);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_GET_SEL_TIME, NULL, ipmi_storage_get_sel_time,
	PRIVILEGE_USER);

	// <Set SEL Time>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_SET_SEL_TIME);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_SET_SEL_TIME, NULL, ipmi_storage_set_sel_time,
	PRIVILEGE_OPERATOR);

	// <Reserve SEL>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_RESERVE_SEL);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_RESERVE_SEL, NULL, ipmi_storage_reserve_sel,
	PRIVILEGE_USER);

	// <Get SEL Entry>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_GET_SEL_ENTRY);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_GET_SEL_ENTRY, NULL, getSELEntry,
	PRIVILEGE_USER);

	// <Delete SEL Entry>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_DELETE_SEL);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_DELETE_SEL, NULL, deleteSELEntry,
	PRIVILEGE_OPERATOR);

	// <Add SEL Entry>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_ADD_SEL);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_ADD_SEL, NULL, ipmi_storage_add_sel,
	PRIVILEGE_OPERATOR);

	// <Clear SEL>
	printf("Registering NetFn:[0x%X], Cmd:[0x%X]\n",NETFUN_STORAGE, IPMI_CMD_CLEAR_SEL);
	ipmi_register_callback(NETFUN_STORAGE, IPMI_CMD_CLEAR_SEL, NULL, clearSEL,
	PRIVILEGE_OPERATOR);
	return;
	}