chassis_state_manager.cpp - openbmc/phosphor-state-manager - Gitiles

 #include "config.h"

 #include "chassis_state_manager.hpp"

 #include "utils.hpp"
 #include "xyz/openbmc_project/Common/error.hpp"
 #include "xyz/openbmc_project/State/Shutdown/Power/error.hpp"

 #include <cereal/archives/json.hpp>
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/bus.hpp>
 #include <sdbusplus/exception.hpp>
 #include <sdeventplus/event.hpp>
 #include <sdeventplus/exception.hpp>

 #include <filesystem>
 #include <fstream>

 namespace phosphor
 {
 namespace state
 {
 namespace manager
 {

 PHOSPHOR_LOG2_USING;

 // When you see server:: you know we're referencing our base class
 namespace server = sdbusplus::xyz::openbmc_project::State::server;

 using namespace phosphor::logging;
 using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
 using sdbusplus::xyz::openbmc_project::State::Shutdown::Power::Error::Blackout;
 using sdbusplus::xyz::openbmc_project::State::Shutdown::Power::Error::Regulator;
 constexpr auto CHASSIS_STATE_POWEROFF_TGT = "obmc-chassis-poweroff@0.target";
 constexpr auto CHASSIS_STATE_HARD_POWEROFF_TGT =
     "obmc-chassis-hard-poweroff@0.target";
 constexpr auto CHASSIS_STATE_POWERON_TGT = "obmc-chassis-poweron@0.target";

 constexpr auto ACTIVE_STATE = "active";
 constexpr auto ACTIVATING_STATE = "activating";

 // Details at https://upower.freedesktop.org/docs/Device.html
 constexpr uint TYPE_UPS = 3;
 constexpr uint STATE_FULLY_CHARGED = 4;
 constexpr uint BATTERY_LVL_FULL = 8;

 /* Map a transition to it's systemd target */
 const std::map<server::Chassis::Transition, std::string> SYSTEMD_TARGET_TABLE =
     {
         // Use the hard off target to ensure we shutdown immediately
         {server::Chassis::Transition::Off, CHASSIS_STATE_HARD_POWEROFF_TGT},
         {server::Chassis::Transition::On, CHASSIS_STATE_POWERON_TGT}};

 constexpr auto SYSTEMD_SERVICE = "org.freedesktop.systemd1";
 constexpr auto SYSTEMD_OBJ_PATH = "/org/freedesktop/systemd1";
 constexpr auto SYSTEMD_INTERFACE = "org.freedesktop.systemd1.Manager";

 constexpr auto SYSTEMD_PROPERTY_IFACE = "org.freedesktop.DBus.Properties";
 constexpr auto SYSTEMD_INTERFACE_UNIT = "org.freedesktop.systemd1.Unit";

 constexpr auto MAPPER_BUSNAME = "xyz.openbmc_project.ObjectMapper";
 constexpr auto MAPPER_PATH = "/xyz/openbmc_project/object_mapper";
 constexpr auto MAPPER_INTERFACE = "xyz.openbmc_project.ObjectMapper";
 constexpr auto UPOWER_INTERFACE = "org.freedesktop.UPower.Device";
 constexpr auto PROPERTY_INTERFACE = "org.freedesktop.DBus.Properties";

 void Chassis::subscribeToSystemdSignals()
 {
     try
     {
         auto method = this->bus.new_method_call(
             SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH, SYSTEMD_INTERFACE, "Subscribe");
         this->bus.call(method);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         error("Failed to subscribe to systemd signals: {ERROR}", "ERROR", e);
         elog<InternalFailure>();
     }

     return;
 }

 // TODO - Will be rewritten once sdbusplus client bindings are in place
 //        and persistent storage design is in place and sdbusplus
 //        has read property function
 void Chassis::determineInitialState()
 {

     // Monitor for any properties changed signals on UPower device path
     uPowerPropChangeSignal = std::make_unique<sdbusplus::bus::match_t>(
         bus,
         sdbusplus::bus::match::rules::propertiesChangedNamespace(
             "/org/freedesktop/UPower", UPOWER_INTERFACE),
         [this](auto& msg) { this->uPowerChangeEvent(msg); });

     determineStatusOfPower();

     std::variant<int> pgood = -1;
     auto method = this->bus.new_method_call(
         "org.openbmc.control.Power", "/org/openbmc/control/power0",
         "org.freedesktop.DBus.Properties", "Get");

     method.append("org.openbmc.control.Power", "pgood");
     try
     {
         auto reply = this->bus.call(method);
         reply.read(pgood);

         if (std::get<int>(pgood) == 1)
         {
             info("Initial Chassis State will be On");
             server::Chassis::currentPowerState(PowerState::On);
             server::Chassis::requestedPowerTransition(Transition::On);
             return;
         }
         else
         {
             // The system is off.  If we think it should be on then
             // we probably lost AC while up, so set a new state
             // change time.
             uint64_t lastTime;
             PowerState lastState;

             if (deserializeStateChangeTime(lastTime, lastState))
             {
                 // If power was on before the BMC reboot and the reboot reason
                 // was not a pinhole reset, log an error
                 if (lastState == PowerState::On)
                 {
                     info(
                         "Chassis power was on before the BMC reboot and it is off now");
                     setStateChangeTime();

                     if (phosphor::state::manager::utils::getGpioValue(
                             "reset-cause-pinhole") != 1)
                     {
                         if (standbyVoltageRegulatorFault())
                         {
                             report<Regulator>();
                         }
                         else
                         {
                             report<Blackout>();
                         }
                     }
                 }
             }
         }
     }
     catch (const sdbusplus::exception::exception& e)
     {
         // It's acceptable for the pgood state service to not be available
         // since it will notify us of the pgood state when it comes up.
         if (e.name() != nullptr &&
             strcmp("org.freedesktop.DBus.Error.ServiceUnknown", e.name()) == 0)
         {
             goto fail;
         }

         // Only log for unexpected error types.
         error("Error performing call to get pgood: {ERROR}", "ERROR", e);
         goto fail;
     }

 fail:
     info("Initial Chassis State will be Off");
     server::Chassis::currentPowerState(PowerState::Off);
     server::Chassis::requestedPowerTransition(Transition::Off);

     return;
 }

 void Chassis::determineStatusOfPower()
 {
     // Default PowerStatus to good
     server::Chassis::currentPowerStatus(PowerStatus::Good);

     // Find all implementations of the UPower interface
     auto mapper = bus.new_method_call(MAPPER_BUSNAME, MAPPER_PATH,
                                       MAPPER_INTERFACE, "GetSubTree");

     mapper.append("/", 0, std::vector<std::string>({UPOWER_INTERFACE}));

     std::map<std::string, std::map<std::string, std::vector<std::string>>>
         mapperResponse;

     try
     {
         auto mapperResponseMsg = bus.call(mapper);
         mapperResponseMsg.read(mapperResponse);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         error("Error in mapper GetSubTree call for UPS: {ERROR}", "ERROR", e);
         throw;
     }

     if (mapperResponse.empty())
     {
         debug("No UPower devices found in system");
     }

     // Iterate through all returned Upower interfaces and look for UPS's
     for (const auto& [path, services] : mapperResponse)
     {
         for (const auto& serviceIter : services)
         {
             const std::string& service = serviceIter.first;

             try
             {
                 auto method = bus.new_method_call(service.c_str(), path.c_str(),
                                                   PROPERTY_INTERFACE, "GetAll");
                 method.append(UPOWER_INTERFACE);

                 auto response = bus.call(method);
                 using Property = std::string;
                 using Value = std::variant<bool, uint>;
                 using PropertyMap = std::map<Property, Value>;
                 PropertyMap properties;
                 response.read(properties);

                 if (std::get<uint>(properties["Type"]) != TYPE_UPS)
                 {
                     info("UPower device {OBJ_PATH} is not a UPS device",
                          "OBJ_PATH", path);
                     continue;
                 }

                 if (std::get<bool>(properties["IsPresent"]) != true)
                 {
                     // There is a UPS detected but it is not officially
                     // "present" yet. Monitor it for state change.
                     info("UPower device {OBJ_PATH} is not present", "OBJ_PATH",
                          path);
                     continue;
                 }

                 if (std::get<uint>(properties["State"]) == STATE_FULLY_CHARGED)
                 {
                     info("UPS is fully charged");
                 }
                 else
                 {
                     info("UPS is not fully charged: {UPS_STATE}", "UPS_STATE",
                          std::get<uint>(properties["State"]));
                     server::Chassis::currentPowerStatus(
                         PowerStatus::UninterruptiblePowerSupply);
                     return;
                 }

                 if (std::get<uint>(properties["BatteryLevel"]) ==
                     BATTERY_LVL_FULL)
                 {
                     info("UPS Battery Level is Full");
                     // Only one UPS per system, we've found it and it's all
                     // good so exit function
                     return;
                 }
                 else
                 {
                     info("UPS Battery Level is Low: {UPS_BAT_LEVEL}",
                          "UPS_BAT_LEVEL",
                          std::get<uint>(properties["BatteryLevel"]));
                     server::Chassis::currentPowerStatus(
                         PowerStatus::UninterruptiblePowerSupply);
                     return;
                 }
             }
             catch (const sdbusplus::exception::exception& e)
             {
                 error("Error reading UPS property, error: {ERROR}, "
                       "service: {SERVICE} path: {PATH}",
                       "ERROR", e, "SERVICE", service, "PATH", path);
                 throw;
             }
         }
     }
     return;
 }

 void Chassis::uPowerChangeEvent(sdbusplus::message::message& msg)
 {
     debug("UPS Property Change Event Triggered");
     std::string statusInterface;
     std::map<std::string, std::variant<uint, bool>> msgData;
     msg.read(statusInterface, msgData);

     // If the change is to any of the three properties we are interested in
     // then call determineStatusOfPower() to see if a power status change
     // is needed
     auto propertyMap = msgData.find("IsPresent");
     if (propertyMap != msgData.end())
     {
         info("UPS presence changed to {UPS_PRES_INFO}", "UPS_PRES_INFO",
              std::get<bool>(propertyMap->second));
         determineStatusOfPower();
         return;
     }

     propertyMap = msgData.find("State");
     if (propertyMap != msgData.end())
     {
         info("UPS State changed to {UPS_STATE}", "UPS_STATE",
              std::get<uint>(propertyMap->second));
         determineStatusOfPower();
         return;
     }

     propertyMap = msgData.find("BatteryLevel");
     if (propertyMap != msgData.end())
     {
         info("UPS BatteryLevel changed to {UPS_BAT_LEVEL}", "UPS_BAT_LEVEL",
              std::get<uint>(propertyMap->second));
         determineStatusOfPower();
         return;
     }
     return;
 }

 void Chassis::executeTransition(Transition tranReq)
 {
     auto sysdTarget = SYSTEMD_TARGET_TABLE.find(tranReq)->second;

     auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
                                             SYSTEMD_INTERFACE, "StartUnit");

     method.append(sysdTarget);
     method.append("replace");

     this->bus.call_noreply(method);

     return;
 }

 bool Chassis::stateActive(const std::string& target)
 {
     std::variant<std::string> currentState;
     sdbusplus::message::object_path unitTargetPath;

     auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
                                             SYSTEMD_INTERFACE, "GetUnit");

     method.append(target);

     try
     {
         auto result = this->bus.call(method);
         result.read(unitTargetPath);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         error("Error in GetUnit call: {ERROR}", "ERROR", e);
         return false;
     }

     method = this->bus.new_method_call(
         SYSTEMD_SERVICE,
         static_cast<const std::string&>(unitTargetPath).c_str(),
         SYSTEMD_PROPERTY_IFACE, "Get");

     method.append(SYSTEMD_INTERFACE_UNIT, "ActiveState");

     try
     {
         auto result = this->bus.call(method);
         result.read(currentState);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         error("Error in ActiveState Get: {ERROR}", "ERROR", e);
         return false;
     }

     const auto& currentStateStr = std::get<std::string>(currentState);
     return currentStateStr == ACTIVE_STATE ||
            currentStateStr == ACTIVATING_STATE;
 }

 int Chassis::sysStateChange(sdbusplus::message::message& msg)
 {
     sdbusplus::message::object_path newStateObjPath;
     std::string newStateUnit{};
     std::string newStateResult{};

     // Read the msg and populate each variable
     try
     {
         // newStateID is a throwaway that is needed in order to read the
         // parameters that are useful out of the dbus message
         uint32_t newStateID{};
         msg.read(newStateID, newStateObjPath, newStateUnit, newStateResult);
     }
     catch (const sdbusplus::exception::exception& e)
     {
         error("Error in state change - bad encoding: {ERROR} {REPLY_SIG}",
               "ERROR", e, "REPLY_SIG", msg.get_signature());
         return 0;
     }

     if ((newStateUnit == CHASSIS_STATE_POWEROFF_TGT) &&
         (newStateResult == "done") && (!stateActive(CHASSIS_STATE_POWERON_TGT)))
     {
         info("Received signal that power OFF is complete");
         this->currentPowerState(server::Chassis::PowerState::Off);
         this->setStateChangeTime();
     }
     else if ((newStateUnit == CHASSIS_STATE_POWERON_TGT) &&
              (newStateResult == "done") &&
              (stateActive(CHASSIS_STATE_POWERON_TGT)))
     {
         info("Received signal that power ON is complete");
         this->currentPowerState(server::Chassis::PowerState::On);
         this->setStateChangeTime();

         // Remove temporary file which is utilized for scenarios where the
         // BMC is rebooted while the chassis power is still on.
         // This file is used to indicate to chassis related systemd services
         // that the chassis is already on and they should skip running.
         // Once the chassis state is back to on we can clear this file.
         auto size = std::snprintf(nullptr, 0, CHASSIS_ON_FILE, 0);
         size++; // null
         std::unique_ptr<char[]> chassisFile(new char[size]);
         std::snprintf(chassisFile.get(), size, CHASSIS_ON_FILE, 0);
         if (std::filesystem::exists(chassisFile.get()))
         {
             std::filesystem::remove(chassisFile.get());
         }
     }

     return 0;
 }

 Chassis::Transition Chassis::requestedPowerTransition(Transition value)
 {

     info("Change to Chassis Requested Power State: {REQ_POWER_TRAN}",
          "REQ_POWER_TRAN", value);
     executeTransition(value);
     return server::Chassis::requestedPowerTransition(value);
 }

 Chassis::PowerState Chassis::currentPowerState(PowerState value)
 {
     PowerState chassisPowerState;
     info("Change to Chassis Power State: {CUR_POWER_STATE}", "CUR_POWER_STATE",
          value);

     chassisPowerState = server::Chassis::currentPowerState(value);
     pohTimer.setEnabled(chassisPowerState == PowerState::On);
     return chassisPowerState;
 }

 uint32_t Chassis::pohCounter(uint32_t value)
 {
     if (value != pohCounter())
     {
         ChassisInherit::pohCounter(value);
         serializePOH();
     }
     return pohCounter();
 }

 void Chassis::pohCallback()
 {
     if (ChassisInherit::currentPowerState() == PowerState::On)
     {
         pohCounter(pohCounter() + 1);
     }
 }

 void Chassis::restorePOHCounter()
 {
     uint32_t counter;
     if (!deserializePOH(POH_COUNTER_PERSIST_PATH, counter))
     {
         // set to default value
         pohCounter(0);
     }
     else
     {
         pohCounter(counter);
     }
 }

 fs::path Chassis::serializePOH(const fs::path& path)
 {
     std::ofstream os(path.c_str(), std::ios::binary);
     cereal::JSONOutputArchive oarchive(os);
     oarchive(pohCounter());
     return path;
 }

 bool Chassis::deserializePOH(const fs::path& path, uint32_t& pohCounter)
 {
     try
     {
         if (fs::exists(path))
         {
             std::ifstream is(path.c_str(), std::ios::in | std::ios::binary);
             cereal::JSONInputArchive iarchive(is);
             iarchive(pohCounter);
             return true;
         }
         return false;
     }
     catch (const cereal::Exception& e)
     {
         error("deserialize exception: {ERROR}", "ERROR", e);
         fs::remove(path);
         return false;
     }
     catch (const fs::filesystem_error& e)
     {
         return false;
     }

     return false;
 }

 void Chassis::startPOHCounter()
 {
     auto dir = fs::path(POH_COUNTER_PERSIST_PATH).parent_path();
     fs::create_directories(dir);

     try
     {
         auto event = sdeventplus::Event::get_default();
         bus.attach_event(event.get(), SD_EVENT_PRIORITY_NORMAL);
         event.loop();
     }
     catch (const sdeventplus::SdEventError& e)
     {
         error("Error occurred during the sdeventplus loop: {ERROR}", "ERROR",
               e);
         phosphor::logging::commit<InternalFailure>();
     }
 }

 void Chassis::serializeStateChangeTime()
 {
     fs::path path{CHASSIS_STATE_CHANGE_PERSIST_PATH};
     std::ofstream os(path.c_str(), std::ios::binary);
     cereal::JSONOutputArchive oarchive(os);

     oarchive(ChassisInherit::lastStateChangeTime(),
              ChassisInherit::currentPowerState());
 }

 bool Chassis::deserializeStateChangeTime(uint64_t& time, PowerState& state)
 {
     fs::path path{CHASSIS_STATE_CHANGE_PERSIST_PATH};

     try
     {
         if (fs::exists(path))
         {
             std::ifstream is(path.c_str(), std::ios::in | std::ios::binary);
             cereal::JSONInputArchive iarchive(is);
             iarchive(time, state);
             return true;
         }
     }
     catch (const std::exception& e)
     {
         error("deserialize exception: {ERROR}", "ERROR", e);
         fs::remove(path);
     }

     return false;
 }

 void Chassis::restoreChassisStateChangeTime()
 {
     uint64_t time;
     PowerState state;

     if (!deserializeStateChangeTime(time, state))
     {
         ChassisInherit::lastStateChangeTime(0);
     }
     else
     {
         ChassisInherit::lastStateChangeTime(time);
     }
 }

 void Chassis::setStateChangeTime()
 {
     using namespace std::chrono;
     uint64_t lastTime;
     PowerState lastState;

     auto now =
         duration_cast<milliseconds>(system_clock::now().time_since_epoch())
             .count();

     // If power is on when the BMC is rebooted, this function will get called
     // because sysStateChange() runs.  Since the power state didn't change
     // in this case, neither should the state change time, so check that
     // the power state actually did change here.
     if (deserializeStateChangeTime(lastTime, lastState))
     {
         if (lastState == ChassisInherit::currentPowerState())
         {
             return;
         }
     }

     ChassisInherit::lastStateChangeTime(now);
     serializeStateChangeTime();
 }

 bool Chassis::standbyVoltageRegulatorFault()
 {
     bool regulatorFault = false;

     // find standby voltage regulator fault via gpiog

     auto gpioval = utils::getGpioValue("regulator-standby-faulted");

     if (-1 == gpioval)
     {
         error("Failed reading regulator-standby-faulted GPIO");
     }

     if (1 == gpioval)
     {
         info("Detected standby voltage regulator fault");
         regulatorFault = true;
     }

     return regulatorFault;
 }

 } // namespace manager
 } // namespace state
 } // namespace phosphor
	#include "config.h"

	#include "chassis_state_manager.hpp"

	#include "utils.hpp"
	#include "xyz/openbmc_project/Common/error.hpp"
	#include "xyz/openbmc_project/State/Shutdown/Power/error.hpp"

	#include <cereal/archives/json.hpp>
	#include <phosphor-logging/elog-errors.hpp>
	#include <phosphor-logging/lg2.hpp>
	#include <sdbusplus/bus.hpp>
	#include <sdbusplus/exception.hpp>
	#include <sdeventplus/event.hpp>
	#include <sdeventplus/exception.hpp>

	#include <filesystem>
	#include <fstream>

	namespace phosphor
	{
	namespace state
	{
	namespace manager
	{

	PHOSPHOR_LOG2_USING;

	// When you see server:: you know we're referencing our base class
	namespace server = sdbusplus::xyz::openbmc_project::State::server;

	using namespace phosphor::logging;
	using sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;
	using sdbusplus::xyz::openbmc_project::State::Shutdown::Power::Error::Blackout;
	using sdbusplus::xyz::openbmc_project::State::Shutdown::Power::Error::Regulator;
	constexpr auto CHASSIS_STATE_POWEROFF_TGT = "obmc-chassis-poweroff@0.target";
	constexpr auto CHASSIS_STATE_HARD_POWEROFF_TGT =
	"obmc-chassis-hard-poweroff@0.target";
	constexpr auto CHASSIS_STATE_POWERON_TGT = "obmc-chassis-poweron@0.target";

	constexpr auto ACTIVE_STATE = "active";
	constexpr auto ACTIVATING_STATE = "activating";

	// Details at https://upower.freedesktop.org/docs/Device.html
	constexpr uint TYPE_UPS = 3;
	constexpr uint STATE_FULLY_CHARGED = 4;
	constexpr uint BATTERY_LVL_FULL = 8;

	/* Map a transition to it's systemd target */
	const std::map<server::Chassis::Transition, std::string> SYSTEMD_TARGET_TABLE =
	{
	// Use the hard off target to ensure we shutdown immediately
	{server::Chassis::Transition::Off, CHASSIS_STATE_HARD_POWEROFF_TGT},
	{server::Chassis::Transition::On, CHASSIS_STATE_POWERON_TGT}};

	constexpr auto SYSTEMD_SERVICE = "org.freedesktop.systemd1";
	constexpr auto SYSTEMD_OBJ_PATH = "/org/freedesktop/systemd1";
	constexpr auto SYSTEMD_INTERFACE = "org.freedesktop.systemd1.Manager";

	constexpr auto SYSTEMD_PROPERTY_IFACE = "org.freedesktop.DBus.Properties";
	constexpr auto SYSTEMD_INTERFACE_UNIT = "org.freedesktop.systemd1.Unit";

	constexpr auto MAPPER_BUSNAME = "xyz.openbmc_project.ObjectMapper";
	constexpr auto MAPPER_PATH = "/xyz/openbmc_project/object_mapper";
	constexpr auto MAPPER_INTERFACE = "xyz.openbmc_project.ObjectMapper";
	constexpr auto UPOWER_INTERFACE = "org.freedesktop.UPower.Device";
	constexpr auto PROPERTY_INTERFACE = "org.freedesktop.DBus.Properties";

	void Chassis::subscribeToSystemdSignals()
	{
	try
	{
	auto method = this->bus.new_method_call(
	SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH, SYSTEMD_INTERFACE, "Subscribe");
	this->bus.call(method);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	error("Failed to subscribe to systemd signals: {ERROR}", "ERROR", e);
	elog<InternalFailure>();
	}

	return;
	}

	// TODO - Will be rewritten once sdbusplus client bindings are in place
	// and persistent storage design is in place and sdbusplus
	// has read property function
	void Chassis::determineInitialState()
	{

	// Monitor for any properties changed signals on UPower device path
	uPowerPropChangeSignal = std::make_unique<sdbusplus::bus::match_t>(
	bus,
	sdbusplus::bus::match::rules::propertiesChangedNamespace(
	"/org/freedesktop/UPower", UPOWER_INTERFACE),
	[this](auto& msg) { this->uPowerChangeEvent(msg); });

	determineStatusOfPower();

	std::variant<int> pgood = -1;
	auto method = this->bus.new_method_call(
	"org.openbmc.control.Power", "/org/openbmc/control/power0",
	"org.freedesktop.DBus.Properties", "Get");

	method.append("org.openbmc.control.Power", "pgood");
	try
	{
	auto reply = this->bus.call(method);
	reply.read(pgood);

	if (std::get<int>(pgood) == 1)
	{
	info("Initial Chassis State will be On");
	server::Chassis::currentPowerState(PowerState::On);
	server::Chassis::requestedPowerTransition(Transition::On);
	return;
	}
	else
	{
	// The system is off. If we think it should be on then
	// we probably lost AC while up, so set a new state
	// change time.
	uint64_t lastTime;
	PowerState lastState;

	if (deserializeStateChangeTime(lastTime, lastState))
	{
	// If power was on before the BMC reboot and the reboot reason
	// was not a pinhole reset, log an error
	if (lastState == PowerState::On)
	{
	info(
	"Chassis power was on before the BMC reboot and it is off now");
	setStateChangeTime();

	if (phosphor::state::manager::utils::getGpioValue(
	"reset-cause-pinhole") != 1)
	{
	if (standbyVoltageRegulatorFault())
	{
	report<Regulator>();
	}
	else
	{
	report<Blackout>();
	}
	}
	}
	}
	}
	}
	catch (const sdbusplus::exception::exception& e)
	{
	// It's acceptable for the pgood state service to not be available
	// since it will notify us of the pgood state when it comes up.
	if (e.name() != nullptr &&
	strcmp("org.freedesktop.DBus.Error.ServiceUnknown", e.name()) == 0)
	{
	goto fail;
	}

	// Only log for unexpected error types.
	error("Error performing call to get pgood: {ERROR}", "ERROR", e);
	goto fail;
	}

	fail:
	info("Initial Chassis State will be Off");
	server::Chassis::currentPowerState(PowerState::Off);
	server::Chassis::requestedPowerTransition(Transition::Off);

	return;
	}

	void Chassis::determineStatusOfPower()
	{
	// Default PowerStatus to good
	server::Chassis::currentPowerStatus(PowerStatus::Good);

	// Find all implementations of the UPower interface
	auto mapper = bus.new_method_call(MAPPER_BUSNAME, MAPPER_PATH,
	MAPPER_INTERFACE, "GetSubTree");

	mapper.append("/", 0, std::vector<std::string>({UPOWER_INTERFACE}));

	std::map<std::string, std::map<std::string, std::vector<std::string>>>
	mapperResponse;

	try
	{
	auto mapperResponseMsg = bus.call(mapper);
	mapperResponseMsg.read(mapperResponse);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	error("Error in mapper GetSubTree call for UPS: {ERROR}", "ERROR", e);
	throw;
	}

	if (mapperResponse.empty())
	{
	debug("No UPower devices found in system");
	}

	// Iterate through all returned Upower interfaces and look for UPS's
	for (const auto& [path, services] : mapperResponse)
	{
	for (const auto& serviceIter : services)
	{
	const std::string& service = serviceIter.first;

	try
	{
	auto method = bus.new_method_call(service.c_str(), path.c_str(),
	PROPERTY_INTERFACE, "GetAll");
	method.append(UPOWER_INTERFACE);

	auto response = bus.call(method);
	using Property = std::string;
	using Value = std::variant<bool, uint>;
	using PropertyMap = std::map<Property, Value>;
	PropertyMap properties;
	response.read(properties);

	if (std::get<uint>(properties["Type"]) != TYPE_UPS)
	{
	info("UPower device {OBJ_PATH} is not a UPS device",
	"OBJ_PATH", path);
	continue;
	}

	if (std::get<bool>(properties["IsPresent"]) != true)
	{
	// There is a UPS detected but it is not officially
	// "present" yet. Monitor it for state change.
	info("UPower device {OBJ_PATH} is not present", "OBJ_PATH",
	path);
	continue;
	}

	if (std::get<uint>(properties["State"]) == STATE_FULLY_CHARGED)
	{
	info("UPS is fully charged");
	}
	else
	{
	info("UPS is not fully charged: {UPS_STATE}", "UPS_STATE",
	std::get<uint>(properties["State"]));
	server::Chassis::currentPowerStatus(
	PowerStatus::UninterruptiblePowerSupply);
	return;
	}

	if (std::get<uint>(properties["BatteryLevel"]) ==
	BATTERY_LVL_FULL)
	{
	info("UPS Battery Level is Full");
	// Only one UPS per system, we've found it and it's all
	// good so exit function
	return;
	}
	else
	{
	info("UPS Battery Level is Low: {UPS_BAT_LEVEL}",
	"UPS_BAT_LEVEL",
	std::get<uint>(properties["BatteryLevel"]));
	server::Chassis::currentPowerStatus(
	PowerStatus::UninterruptiblePowerSupply);
	return;
	}
	}
	catch (const sdbusplus::exception::exception& e)
	{
	error("Error reading UPS property, error: {ERROR}, "
	"service: {SERVICE} path: {PATH}",
	"ERROR", e, "SERVICE", service, "PATH", path);
	throw;
	}
	}
	}
	return;
	}

	void Chassis::uPowerChangeEvent(sdbusplus::message::message& msg)
	{
	debug("UPS Property Change Event Triggered");
	std::string statusInterface;
	std::map<std::string, std::variant<uint, bool>> msgData;
	msg.read(statusInterface, msgData);

	// If the change is to any of the three properties we are interested in
	// then call determineStatusOfPower() to see if a power status change
	// is needed
	auto propertyMap = msgData.find("IsPresent");
	if (propertyMap != msgData.end())
	{
	info("UPS presence changed to {UPS_PRES_INFO}", "UPS_PRES_INFO",
	std::get<bool>(propertyMap->second));
	determineStatusOfPower();
	return;
	}

	propertyMap = msgData.find("State");
	if (propertyMap != msgData.end())
	{
	info("UPS State changed to {UPS_STATE}", "UPS_STATE",
	std::get<uint>(propertyMap->second));
	determineStatusOfPower();
	return;
	}

	propertyMap = msgData.find("BatteryLevel");
	if (propertyMap != msgData.end())
	{
	info("UPS BatteryLevel changed to {UPS_BAT_LEVEL}", "UPS_BAT_LEVEL",
	std::get<uint>(propertyMap->second));
	determineStatusOfPower();
	return;
	}
	return;
	}

	void Chassis::executeTransition(Transition tranReq)
	{
	auto sysdTarget = SYSTEMD_TARGET_TABLE.find(tranReq)->second;

	auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
	SYSTEMD_INTERFACE, "StartUnit");

	method.append(sysdTarget);
	method.append("replace");

	this->bus.call_noreply(method);

	return;
	}

	bool Chassis::stateActive(const std::string& target)
	{
	std::variant<std::string> currentState;
	sdbusplus::message::object_path unitTargetPath;

	auto method = this->bus.new_method_call(SYSTEMD_SERVICE, SYSTEMD_OBJ_PATH,
	SYSTEMD_INTERFACE, "GetUnit");

	method.append(target);

	try
	{
	auto result = this->bus.call(method);
	result.read(unitTargetPath);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	error("Error in GetUnit call: {ERROR}", "ERROR", e);
	return false;
	}

	method = this->bus.new_method_call(
	SYSTEMD_SERVICE,
	static_cast<const std::string&>(unitTargetPath).c_str(),
	SYSTEMD_PROPERTY_IFACE, "Get");

	method.append(SYSTEMD_INTERFACE_UNIT, "ActiveState");

	try
	{
	auto result = this->bus.call(method);
	result.read(currentState);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	error("Error in ActiveState Get: {ERROR}", "ERROR", e);
	return false;
	}

	const auto& currentStateStr = std::get<std::string>(currentState);
	return currentStateStr == ACTIVE_STATE \|\|
	currentStateStr == ACTIVATING_STATE;
	}

	int Chassis::sysStateChange(sdbusplus::message::message& msg)
	{
	sdbusplus::message::object_path newStateObjPath;
	std::string newStateUnit{};
	std::string newStateResult{};

	// Read the msg and populate each variable
	try
	{
	// newStateID is a throwaway that is needed in order to read the
	// parameters that are useful out of the dbus message
	uint32_t newStateID{};
	msg.read(newStateID, newStateObjPath, newStateUnit, newStateResult);
	}
	catch (const sdbusplus::exception::exception& e)
	{
	error("Error in state change - bad encoding: {ERROR} {REPLY_SIG}",
	"ERROR", e, "REPLY_SIG", msg.get_signature());
	return 0;
	}

	if ((newStateUnit == CHASSIS_STATE_POWEROFF_TGT) &&
	(newStateResult == "done") && (!stateActive(CHASSIS_STATE_POWERON_TGT)))
	{
	info("Received signal that power OFF is complete");
	this->currentPowerState(server::Chassis::PowerState::Off);
	this->setStateChangeTime();
	}
	else if ((newStateUnit == CHASSIS_STATE_POWERON_TGT) &&
	(newStateResult == "done") &&
	(stateActive(CHASSIS_STATE_POWERON_TGT)))
	{
	info("Received signal that power ON is complete");
	this->currentPowerState(server::Chassis::PowerState::On);
	this->setStateChangeTime();

	// Remove temporary file which is utilized for scenarios where the
	// BMC is rebooted while the chassis power is still on.
	// This file is used to indicate to chassis related systemd services
	// that the chassis is already on and they should skip running.
	// Once the chassis state is back to on we can clear this file.
	auto size = std::snprintf(nullptr, 0, CHASSIS_ON_FILE, 0);
	size++; // null
	std::unique_ptr<char[]> chassisFile(new char[size]);
	std::snprintf(chassisFile.get(), size, CHASSIS_ON_FILE, 0);
	if (std::filesystem::exists(chassisFile.get()))
	{
	std::filesystem::remove(chassisFile.get());
	}
	}

	return 0;
	}

	Chassis::Transition Chassis::requestedPowerTransition(Transition value)
	{

	info("Change to Chassis Requested Power State: {REQ_POWER_TRAN}",
	"REQ_POWER_TRAN", value);
	executeTransition(value);
	return server::Chassis::requestedPowerTransition(value);
	}

	Chassis::PowerState Chassis::currentPowerState(PowerState value)
	{
	PowerState chassisPowerState;
	info("Change to Chassis Power State: {CUR_POWER_STATE}", "CUR_POWER_STATE",
	value);

	chassisPowerState = server::Chassis::currentPowerState(value);
	pohTimer.setEnabled(chassisPowerState == PowerState::On);
	return chassisPowerState;
	}

	uint32_t Chassis::pohCounter(uint32_t value)
	{
	if (value != pohCounter())
	{
	ChassisInherit::pohCounter(value);
	serializePOH();
	}
	return pohCounter();
	}

	void Chassis::pohCallback()
	{
	if (ChassisInherit::currentPowerState() == PowerState::On)
	{
	pohCounter(pohCounter() + 1);
	}
	}

	void Chassis::restorePOHCounter()
	{
	uint32_t counter;
	if (!deserializePOH(POH_COUNTER_PERSIST_PATH, counter))
	{
	// set to default value
	pohCounter(0);
	}
	else
	{
	pohCounter(counter);
	}
	}

	fs::path Chassis::serializePOH(const fs::path& path)
	{
	std::ofstream os(path.c_str(), std::ios::binary);
	cereal::JSONOutputArchive oarchive(os);
	oarchive(pohCounter());
	return path;
	}

	bool Chassis::deserializePOH(const fs::path& path, uint32_t& pohCounter)
	{
	try
	{
	if (fs::exists(path))
	{
	std::ifstream is(path.c_str(), std::ios::in \| std::ios::binary);
	cereal::JSONInputArchive iarchive(is);
	iarchive(pohCounter);
	return true;
	}
	return false;
	}
	catch (const cereal::Exception& e)
	{
	error("deserialize exception: {ERROR}", "ERROR", e);
	fs::remove(path);
	return false;
	}
	catch (const fs::filesystem_error& e)
	{
	return false;
	}

	return false;
	}

	void Chassis::startPOHCounter()
	{
	auto dir = fs::path(POH_COUNTER_PERSIST_PATH).parent_path();
	fs::create_directories(dir);

	try
	{
	auto event = sdeventplus::Event::get_default();
	bus.attach_event(event.get(), SD_EVENT_PRIORITY_NORMAL);
	event.loop();
	}
	catch (const sdeventplus::SdEventError& e)
	{
	error("Error occurred during the sdeventplus loop: {ERROR}", "ERROR",
	e);
	phosphor::logging::commit<InternalFailure>();
	}
	}

	void Chassis::serializeStateChangeTime()
	{
	fs::path path{CHASSIS_STATE_CHANGE_PERSIST_PATH};
	std::ofstream os(path.c_str(), std::ios::binary);
	cereal::JSONOutputArchive oarchive(os);

	oarchive(ChassisInherit::lastStateChangeTime(),
	ChassisInherit::currentPowerState());
	}

	bool Chassis::deserializeStateChangeTime(uint64_t& time, PowerState& state)
	{
	fs::path path{CHASSIS_STATE_CHANGE_PERSIST_PATH};

	try
	{
	if (fs::exists(path))
	{
	std::ifstream is(path.c_str(), std::ios::in \| std::ios::binary);
	cereal::JSONInputArchive iarchive(is);
	iarchive(time, state);
	return true;
	}
	}
	catch (const std::exception& e)
	{
	error("deserialize exception: {ERROR}", "ERROR", e);
	fs::remove(path);
	}

	return false;
	}

	void Chassis::restoreChassisStateChangeTime()
	{
	uint64_t time;
	PowerState state;

	if (!deserializeStateChangeTime(time, state))
	{
	ChassisInherit::lastStateChangeTime(0);
	}
	else
	{
	ChassisInherit::lastStateChangeTime(time);
	}
	}

	void Chassis::setStateChangeTime()
	{
	using namespace std::chrono;
	uint64_t lastTime;
	PowerState lastState;

	auto now =
	duration_cast<milliseconds>(system_clock::now().time_since_epoch())
	.count();

	// If power is on when the BMC is rebooted, this function will get called
	// because sysStateChange() runs. Since the power state didn't change
	// in this case, neither should the state change time, so check that
	// the power state actually did change here.
	if (deserializeStateChangeTime(lastTime, lastState))
	{
	if (lastState == ChassisInherit::currentPowerState())
	{
	return;
	}
	}

	ChassisInherit::lastStateChangeTime(now);
	serializeStateChangeTime();
	}

	bool Chassis::standbyVoltageRegulatorFault()
	{
	bool regulatorFault = false;

	// find standby voltage regulator fault via gpiog

	auto gpioval = utils::getGpioValue("regulator-standby-faulted");

	if (-1 == gpioval)
	{
	error("Failed reading regulator-standby-faulted GPIO");
	}

	if (1 == gpioval)
	{
	info("Detected standby voltage regulator fault");
	regulatorFault = true;
	}

	return regulatorFault;
	}

	} // namespace manager
	} // namespace state
	} // namespace phosphor