manager/lamptest/lamptest.cpp - openbmc/phosphor-led-manager - Gitiles

 #include "lamptest.hpp"

 #include <phosphor-logging/lg2.hpp>

 #include <algorithm>

 namespace phosphor
 {
 namespace led
 {

 using Json = nlohmann::json;
 static const fs::path lampTestIndicator =
     "/var/lib/phosphor-led-manager/lamp-test-running";

 bool LampTest::processLEDUpdates(const ActionSet& ledsAssert,
                                  const ActionSet& ledsDeAssert)
 {
     // If the physical LED status is updated during the lamp test, it should be
     // saved to Queue, and the queue will be processed after the lamp test is
     // stopped.
     if (isLampTestRunning)
     {
         // Physical LEDs will be updated during lamp test
         for (const auto& it : ledsDeAssert)
         {
             std::string path = std::string(phyLedPath) + it.name;
             auto iter = std::find_if(
                 forceUpdateLEDs.begin(), forceUpdateLEDs.end(),
                 [&path](const auto& name) { return name == path; });

             if (iter != forceUpdateLEDs.end())
             {
                 manager.drivePhysicalLED(path, Layout::Action::Off, it.dutyOn,
                                          it.period);
             }
         }

         for (const auto& it : ledsAssert)
         {
             std::string path = std::string(phyLedPath) + it.name;
             auto iter = std::find_if(
                 forceUpdateLEDs.begin(), forceUpdateLEDs.end(),
                 [&path](const auto& name) { return name == path; });

             if (iter != forceUpdateLEDs.end())
             {
                 manager.drivePhysicalLED(path, it.action, it.dutyOn, it.period);
             }
         }

         updatedLEDsDuringLampTest.emplace(ledsAssert, ledsDeAssert);
         return true;
     }
     return false;
 }

 void LampTest::stop()
 {
     if (!isLampTestRunning)
     {
         return;
     }

     timer.setEnabled(false);

     // Stop host lamp test
     doHostLampTest(false);

     // Set all the Physical action to Off
     for (const auto& path : physicalLEDPaths)
     {
         auto iter =
             std::find_if(skipUpdateLEDs.begin(), skipUpdateLEDs.end(),
                          [&path](const auto& skip) { return skip == path; });

         if (iter != skipUpdateLEDs.end())
         {
             // Skip update physical path
             continue;
         }

         manager.drivePhysicalLED(path, Layout::Action::Off, 0, 0);
     }

     if (std::filesystem::exists(lampTestIndicator))
     {
         if (!std::filesystem::remove(lampTestIndicator))
         {
             lg2::error(
                 "Error removing lamp test on indicator file after lamp test execution.");
         }
     }

     isLampTestRunning = false;
     restorePhysicalLedStates();
 }

 Layout::Action LampTest::getActionFromString(const std::string& str)
 {
     Layout::Action action = Layout::Action::Off;

     if (str == "xyz.openbmc_project.Led.Physical.Action.On")
     {
         action = Layout::Action::On;
     }
     else if (str == "xyz.openbmc_project.Led.Physical.Action.Blink")
     {
         action = Layout::Action::Blink;
     }

     return action;
 }

 void LampTest::storePhysicalLEDsStates()
 {
     physicalLEDStatesPriorToLampTest.clear();

     for (const auto& path : physicalLEDPaths)
     {
         auto iter = std::find_if(
             skipUpdateLEDs.begin(), skipUpdateLEDs.end(),
             [&path](const auto& skipLed) { return skipLed == path; });

         if (iter != skipUpdateLEDs.end())
         {
             // Physical LEDs will be skipped
             continue;
         }

         // Reverse intercept path, Get the name of each member of physical led
         // e.g: path = /xyz/openbmc_project/led/physical/front_fan
         //      name = front_fan
         sdbusplus::message::object_path object_path(path);
         auto name = object_path.filename();
         if (name.empty())
         {
             lg2::error(
                 "Failed to get the name of member of physical LED path, PATH = {PATH}, NAME = {NAME}",
                 "PATH", path, "NAME", name);
             continue;
         }

         std::string state{};
         uint16_t period{};
         uint8_t dutyOn{};
         try
         {
             auto properties = dBusHandler.getAllProperties(path, phyLedIntf);

             state = std::get<std::string>(properties["State"]);
             period = std::get<uint16_t>(properties["Period"]);
             dutyOn = std::get<uint8_t>(properties["DutyOn"]);
         }
         catch (const sdbusplus::exception_t& e)
         {
             lg2::error(
                 "Failed to get All properties, ERROR = {ERROR}, PATH = {PATH}",
                 "ERROR", e, "PATH", path);
             continue;
         }

         phosphor::led::Layout::Action action = getActionFromString(state);
         if (action != phosphor::led::Layout::Action::Off)
         {
             phosphor::led::Layout::LedAction ledAction{
                 name, action, dutyOn, period,
                 phosphor::led::Layout::Action::On};
             physicalLEDStatesPriorToLampTest.emplace(ledAction);
         }
     }
 }

 void LampTest::start()
 {
     if (isLampTestRunning)
     {
         // reset the timer and then return
         timer.restart(std::chrono::seconds(LAMP_TEST_TIMEOUT_IN_SECS));

         // Notify host to reset the timer
         doHostLampTest(true);

         return;
     }

     // Get paths of all the Physical LED objects
     try
     {
         physicalLEDPaths = dBusHandler.getSubTreePaths(phyLedPath, phyLedIntf);
     }
     catch (const sdbusplus::exception_t& e)
     {
         lg2::error(
             "Failed to call the SubTreePaths method: {ERROR}, ledPath: {PATH}, ledInterface: {INTERFACE}",
             "ERROR", e, "PATH", phyLedPath, "INTERFACE", phyLedIntf);
         return;
     }

     // Get physical LEDs states before lamp test
     storePhysicalLEDsStates();

     // restart lamp test, it contains initiate or reset the timer.
     timer.restart(std::chrono::seconds(LAMP_TEST_TIMEOUT_IN_SECS));
     isLampTestRunning = true;

     // Notify host to start the lamp test
     doHostLampTest(true);

     // Create a file to maintain the state across reboots that Lamp test is on.
     // This is required as there was a scenario where it has been found that
     // LEDs remains in "on" state if lamp test is triggered and reboot takes
     // place.
     const auto ledDirectory = lampTestIndicator.parent_path();

     if (!fs::exists(ledDirectory))
     {
         fs::create_directories(ledDirectory);
     }

     std::ofstream ofs(lampTestIndicator.c_str());

     // Set all the Physical action to On for lamp test
     for (const auto& path : physicalLEDPaths)
     {
         auto iter =
             std::find_if(skipUpdateLEDs.begin(), skipUpdateLEDs.end(),
                          [&path](const auto& skip) { return skip == path; });

         if (iter != skipUpdateLEDs.end())
         {
             // Skip update physical path
             continue;
         }

         manager.drivePhysicalLED(path, Layout::Action::On, 0, 0);
     }
 }

 void LampTest::timeOutHandler()
 {
     // set the Asserted property of lamp test to false
     if (!groupObj)
     {
         lg2::error("the Group object is nullptr");
         throw std::runtime_error("the Group object is nullptr");
     }

     groupObj->asserted(false);
 }

 bool LampTest::requestHandler(Group* group, bool value)
 {
     if (groupObj == nullptr)
     {
         groupObj = std::move(group);
     }

     if (value)
     {
         start();

         // Return true in both cases (F -> T && T -> T)
         return true;
     }
     else
     {
         if (timer.hasExpired())
         {
             stop();

             // Return true as the request to stop the lamptest is handled
             // successfully.
             return true;
         }
         else if (timer.isEnabled())
         {
             lg2::info(
                 "Lamp test is still running. Cannot force stop the lamp test. Asserted is set back to true.");

             // Return false as the request to stop lamptest is not handled as
             // the lamptest is still running.
             return false;
         }
         return false;
     }
 }

 void LampTest::restorePhysicalLedStates()
 {
     // restore physical LEDs states before lamp test
     ActionSet ledsDeAssert{};
     manager.driveLEDs(physicalLEDStatesPriorToLampTest, ledsDeAssert);
     physicalLEDStatesPriorToLampTest.clear();

     // restore physical LEDs states during lamp test
     while (!updatedLEDsDuringLampTest.empty())
     {
         auto& [ledsAssert, ledsDeAssert] = updatedLEDsDuringLampTest.front();
         manager.driveLEDs(ledsAssert, ledsDeAssert);
         updatedLEDsDuringLampTest.pop();
     }
 }

 void LampTest::doHostLampTest(bool value)
 {
     try
     {
         PropertyValue assertedValue{value};
         dBusHandler.setProperty(HOST_LAMP_TEST_OBJECT,
                                 "xyz.openbmc_project.Led.Group", "Asserted",
                                 assertedValue);
     }
     catch (const sdbusplus::exception_t& e)
     {
         lg2::error(
             "Failed to set Asserted property, ERROR = {ERROR}, PATH = {PATH}",
             "ERROR", e, "PATH", std::string(HOST_LAMP_TEST_OBJECT));
     }
 }

 void LampTest::getPhysicalLEDNamesFromJson(const fs::path& path)
 {
     if (!fs::exists(path) || fs::is_empty(path))
     {
         lg2::info("The file does not exist or is empty, FILE_PATH = {PATH}",
                   "PATH", path);
         return;
     }

     try
     {
         std::ifstream jsonFile(path);
         auto json = Json::parse(jsonFile);

         // define the default JSON as empty
         const std::vector<std::string> empty{};
         auto forceLEDs = json.value("forceLEDs", empty);
         std::ranges::transform(forceLEDs, std::back_inserter(forceUpdateLEDs),
                                [](const auto& i) { return phyLedPath + i; });

         auto skipLEDs = json.value("skipLEDs", empty);
         std::ranges::transform(skipLEDs, std::back_inserter(skipUpdateLEDs),
                                [](const auto& i) { return phyLedPath + i; });
     }
     catch (const std::exception& e)
     {
         lg2::error(
             "Failed to parse config file, ERROR = {ERROR}, FILE_PATH = {PATH}",
             "ERROR", e, "PATH", path);
     }
     return;
 }

 void LampTest::clearLamps()
 {
     if (std::filesystem::exists(lampTestIndicator))
     {
         // we need to off all the LEDs.
         phosphor::led::utils::DBusHandler dBusHandler;
         std::vector<std::string> physicalLedPaths = dBusHandler.getSubTreePaths(
             phosphor::led::phyLedPath, phosphor::led::phyLedIntf);

         for (const auto& path : physicalLedPaths)
         {
             manager.drivePhysicalLED(path, phosphor::led::Layout::Action::Off,
                                      0, 0);
         }

         // Also remove the lamp test on indicator file.
         if (!std::filesystem::remove(lampTestIndicator))
         {
             lg2::error(
                 "Error removing lamp test on indicator file after lamp test execution.");
         }
     }
 }
 } // namespace led
 } // namespace phosphor
	#include "lamptest.hpp"

	#include <phosphor-logging/lg2.hpp>

	#include <algorithm>

	namespace phosphor
	{
	namespace led
	{

	using Json = nlohmann::json;
	static const fs::path lampTestIndicator =
	"/var/lib/phosphor-led-manager/lamp-test-running";

	bool LampTest::processLEDUpdates(const ActionSet& ledsAssert,
	const ActionSet& ledsDeAssert)
	{
	// If the physical LED status is updated during the lamp test, it should be
	// saved to Queue, and the queue will be processed after the lamp test is
	// stopped.
	if (isLampTestRunning)
	{
	// Physical LEDs will be updated during lamp test
	for (const auto& it : ledsDeAssert)
	{
	std::string path = std::string(phyLedPath) + it.name;
	auto iter = std::find_if(
	forceUpdateLEDs.begin(), forceUpdateLEDs.end(),
	[&path](const auto& name) { return name == path; });

	if (iter != forceUpdateLEDs.end())
	{
	manager.drivePhysicalLED(path, Layout::Action::Off, it.dutyOn,
	it.period);
	}
	}

	for (const auto& it : ledsAssert)
	{
	std::string path = std::string(phyLedPath) + it.name;
	auto iter = std::find_if(
	forceUpdateLEDs.begin(), forceUpdateLEDs.end(),
	[&path](const auto& name) { return name == path; });

	if (iter != forceUpdateLEDs.end())
	{
	manager.drivePhysicalLED(path, it.action, it.dutyOn, it.period);
	}
	}

	updatedLEDsDuringLampTest.emplace(ledsAssert, ledsDeAssert);
	return true;
	}
	return false;
	}

	void LampTest::stop()
	{
	if (!isLampTestRunning)
	{
	return;
	}

	timer.setEnabled(false);

	// Stop host lamp test
	doHostLampTest(false);

	// Set all the Physical action to Off
	for (const auto& path : physicalLEDPaths)
	{
	auto iter =
	std::find_if(skipUpdateLEDs.begin(), skipUpdateLEDs.end(),
	[&path](const auto& skip) { return skip == path; });

	if (iter != skipUpdateLEDs.end())
	{
	// Skip update physical path
	continue;
	}

	manager.drivePhysicalLED(path, Layout::Action::Off, 0, 0);
	}

	if (std::filesystem::exists(lampTestIndicator))
	{
	if (!std::filesystem::remove(lampTestIndicator))
	{
	lg2::error(
	"Error removing lamp test on indicator file after lamp test execution.");
	}
	}

	isLampTestRunning = false;
	restorePhysicalLedStates();
	}

	Layout::Action LampTest::getActionFromString(const std::string& str)
	{
	Layout::Action action = Layout::Action::Off;

	if (str == "xyz.openbmc_project.Led.Physical.Action.On")
	{
	action = Layout::Action::On;
	}
	else if (str == "xyz.openbmc_project.Led.Physical.Action.Blink")
	{
	action = Layout::Action::Blink;
	}

	return action;
	}

	void LampTest::storePhysicalLEDsStates()
	{
	physicalLEDStatesPriorToLampTest.clear();

	for (const auto& path : physicalLEDPaths)
	{
	auto iter = std::find_if(
	skipUpdateLEDs.begin(), skipUpdateLEDs.end(),
	[&path](const auto& skipLed) { return skipLed == path; });

	if (iter != skipUpdateLEDs.end())
	{
	// Physical LEDs will be skipped
	continue;
	}

	// Reverse intercept path, Get the name of each member of physical led
	// e.g: path = /xyz/openbmc_project/led/physical/front_fan
	// name = front_fan
	sdbusplus::message::object_path object_path(path);
	auto name = object_path.filename();
	if (name.empty())
	{
	lg2::error(
	"Failed to get the name of member of physical LED path, PATH = {PATH}, NAME = {NAME}",
	"PATH", path, "NAME", name);
	continue;
	}

	std::string state{};
	uint16_t period{};
	uint8_t dutyOn{};
	try
	{
	auto properties = dBusHandler.getAllProperties(path, phyLedIntf);

	state = std::get<std::string>(properties["State"]);
	period = std::get<uint16_t>(properties["Period"]);
	dutyOn = std::get<uint8_t>(properties["DutyOn"]);
	}
	catch (const sdbusplus::exception_t& e)
	{
	lg2::error(
	"Failed to get All properties, ERROR = {ERROR}, PATH = {PATH}",
	"ERROR", e, "PATH", path);
	continue;
	}

	phosphor::led::Layout::Action action = getActionFromString(state);
	if (action != phosphor::led::Layout::Action::Off)
	{
	phosphor::led::Layout::LedAction ledAction{
	name, action, dutyOn, period,
	phosphor::led::Layout::Action::On};
	physicalLEDStatesPriorToLampTest.emplace(ledAction);
	}
	}
	}

	void LampTest::start()
	{
	if (isLampTestRunning)
	{
	// reset the timer and then return
	timer.restart(std::chrono::seconds(LAMP_TEST_TIMEOUT_IN_SECS));

	// Notify host to reset the timer
	doHostLampTest(true);

	return;
	}

	// Get paths of all the Physical LED objects
	try
	{
	physicalLEDPaths = dBusHandler.getSubTreePaths(phyLedPath, phyLedIntf);
	}
	catch (const sdbusplus::exception_t& e)
	{
	lg2::error(
	"Failed to call the SubTreePaths method: {ERROR}, ledPath: {PATH}, ledInterface: {INTERFACE}",
	"ERROR", e, "PATH", phyLedPath, "INTERFACE", phyLedIntf);
	return;
	}

	// Get physical LEDs states before lamp test
	storePhysicalLEDsStates();

	// restart lamp test, it contains initiate or reset the timer.
	timer.restart(std::chrono::seconds(LAMP_TEST_TIMEOUT_IN_SECS));
	isLampTestRunning = true;

	// Notify host to start the lamp test
	doHostLampTest(true);

	// Create a file to maintain the state across reboots that Lamp test is on.
	// This is required as there was a scenario where it has been found that
	// LEDs remains in "on" state if lamp test is triggered and reboot takes
	// place.
	const auto ledDirectory = lampTestIndicator.parent_path();

	if (!fs::exists(ledDirectory))
	{
	fs::create_directories(ledDirectory);
	}

	std::ofstream ofs(lampTestIndicator.c_str());

	// Set all the Physical action to On for lamp test
	for (const auto& path : physicalLEDPaths)
	{
	auto iter =
	std::find_if(skipUpdateLEDs.begin(), skipUpdateLEDs.end(),
	[&path](const auto& skip) { return skip == path; });

	if (iter != skipUpdateLEDs.end())
	{
	// Skip update physical path
	continue;
	}

	manager.drivePhysicalLED(path, Layout::Action::On, 0, 0);
	}
	}

	void LampTest::timeOutHandler()
	{
	// set the Asserted property of lamp test to false
	if (!groupObj)
	{
	lg2::error("the Group object is nullptr");
	throw std::runtime_error("the Group object is nullptr");
	}

	groupObj->asserted(false);
	}

	bool LampTest::requestHandler(Group* group, bool value)
	{
	if (groupObj == nullptr)
	{
	groupObj = std::move(group);
	}

	if (value)
	{
	start();

	// Return true in both cases (F -> T && T -> T)
	return true;
	}
	else
	{
	if (timer.hasExpired())
	{
	stop();

	// Return true as the request to stop the lamptest is handled
	// successfully.
	return true;
	}
	else if (timer.isEnabled())
	{
	lg2::info(
	"Lamp test is still running. Cannot force stop the lamp test. Asserted is set back to true.");

	// Return false as the request to stop lamptest is not handled as
	// the lamptest is still running.
	return false;
	}
	return false;
	}
	}

	void LampTest::restorePhysicalLedStates()
	{
	// restore physical LEDs states before lamp test
	ActionSet ledsDeAssert{};
	manager.driveLEDs(physicalLEDStatesPriorToLampTest, ledsDeAssert);
	physicalLEDStatesPriorToLampTest.clear();

	// restore physical LEDs states during lamp test
	while (!updatedLEDsDuringLampTest.empty())
	{
	auto& [ledsAssert, ledsDeAssert] = updatedLEDsDuringLampTest.front();
	manager.driveLEDs(ledsAssert, ledsDeAssert);
	updatedLEDsDuringLampTest.pop();
	}
	}

	void LampTest::doHostLampTest(bool value)
	{
	try
	{
	PropertyValue assertedValue{value};
	dBusHandler.setProperty(HOST_LAMP_TEST_OBJECT,
	"xyz.openbmc_project.Led.Group", "Asserted",
	assertedValue);
	}
	catch (const sdbusplus::exception_t& e)
	{
	lg2::error(
	"Failed to set Asserted property, ERROR = {ERROR}, PATH = {PATH}",
	"ERROR", e, "PATH", std::string(HOST_LAMP_TEST_OBJECT));
	}
	}

	void LampTest::getPhysicalLEDNamesFromJson(const fs::path& path)
	{
	if (!fs::exists(path) \|\| fs::is_empty(path))
	{
	lg2::info("The file does not exist or is empty, FILE_PATH = {PATH}",
	"PATH", path);
	return;
	}

	try
	{
	std::ifstream jsonFile(path);
	auto json = Json::parse(jsonFile);

	// define the default JSON as empty
	const std::vector<std::string> empty{};
	auto forceLEDs = json.value("forceLEDs", empty);
	std::ranges::transform(forceLEDs, std::back_inserter(forceUpdateLEDs),
	[](const auto& i) { return phyLedPath + i; });

	auto skipLEDs = json.value("skipLEDs", empty);
	std::ranges::transform(skipLEDs, std::back_inserter(skipUpdateLEDs),
	[](const auto& i) { return phyLedPath + i; });
	}
	catch (const std::exception& e)
	{
	lg2::error(
	"Failed to parse config file, ERROR = {ERROR}, FILE_PATH = {PATH}",
	"ERROR", e, "PATH", path);
	}
	return;
	}

	void LampTest::clearLamps()
	{
	if (std::filesystem::exists(lampTestIndicator))
	{
	// we need to off all the LEDs.
	phosphor::led::utils::DBusHandler dBusHandler;
	std::vector<std::string> physicalLedPaths = dBusHandler.getSubTreePaths(
	phosphor::led::phyLedPath, phosphor::led::phyLedIntf);

	for (const auto& path : physicalLedPaths)
	{
	manager.drivePhysicalLED(path, phosphor::led::Layout::Action::Off,
	0, 0);
	}

	// Also remove the lamp test on indicator file.
	if (!std::filesystem::remove(lampTestIndicator))
	{
	lg2::error(
	"Error removing lamp test on indicator file after lamp test execution.");
	}
	}
	}
	} // namespace led
	} // namespace phosphor