main.cpp - openbmc/phosphor-pid-control - Gitiles

 /**
  * Copyright 2017 Google Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "config.h"

 #include "buildjson/buildjson.hpp"
 #include "conf.hpp"
 #include "dbus/dbusconfiguration.hpp"
 #include "interfaces.hpp"
 #include "pid/builder.hpp"
 #include "pid/buildjson.hpp"
 #include "pid/pidloop.hpp"
 #include "pid/tuning.hpp"
 #include "pid/zone.hpp"
 #include "sensors/builder.hpp"
 #include "sensors/buildjson.hpp"
 #include "sensors/manager.hpp"
 #include "util.hpp"

 #include <CLI/CLI.hpp>
 #include <boost/asio/io_context.hpp>
 #include <boost/asio/signal_set.hpp>
 #include <boost/asio/steady_timer.hpp>
 #include <sdbusplus/asio/connection.hpp>
 #include <sdbusplus/bus.hpp>
 #include <sdbusplus/server/manager.hpp>

 #include <chrono>
 #include <filesystem>
 #include <iostream>
 #include <list>
 #include <map>
 #include <memory>
 #include <thread>
 #include <unordered_map>
 #include <utility>
 #include <vector>

 namespace pid_control
 {

 /* The configuration converted sensor list. */
 std::map<std::string, conf::SensorConfig> sensorConfig = {};
 /* The configuration converted PID list. */
 std::map<int64_t, conf::PIDConf> zoneConfig = {};
 /* The configuration converted Zone configuration. */
 std::map<int64_t, conf::ZoneConfig> zoneDetailsConfig = {};

 } // namespace pid_control

 /** the swampd daemon will check for the existence of this file. */
 constexpr auto jsonConfigurationPath = "/usr/share/swampd/config.json";
 std::string configPath = "";

 /* async io context for operation */
 boost::asio::io_context io;
 /* async signal_set for signal handling */
 boost::asio::signal_set signals(io, SIGHUP);

 /* buses for system control */
 static sdbusplus::asio::connection modeControlBus(io);
 static sdbusplus::asio::connection
     hostBus(io, sdbusplus::bus::new_system().release());
 static sdbusplus::asio::connection
     passiveBus(io, sdbusplus::bus::new_system().release());

 namespace pid_control
 {

 void restartControlLoops()
 {
     static SensorManager mgmr;
     static std::unordered_map<int64_t, std::shared_ptr<ZoneInterface>> zones;
     static std::vector<std::shared_ptr<boost::asio::steady_timer>> timers;
     static bool isCanceling = false;

     for (const auto& timer : timers)
     {
         timer->cancel();
     }
     isCanceling = true;
     timers.clear();

     if (zones.size() > 0 && zones.begin()->second.use_count() > 1)
     {
         throw std::runtime_error("wait for count back to 1");
     }
     zones.clear();
     isCanceling = false;

     const std::string& path =
         (configPath.length() > 0) ? configPath : jsonConfigurationPath;

     if (std::filesystem::exists(path))
     {
         /*
          * When building the sensors, if any of the dbus passive ones aren't on
          * the bus, it'll fail immediately.
          */
         try
         {
             auto jsonData = parseValidateJson(path);
             sensorConfig = buildSensorsFromJson(jsonData);
             std::tie(zoneConfig, zoneDetailsConfig) =
                 buildPIDsFromJson(jsonData);
         }
         catch (const std::exception& e)
         {
             std::cerr << "Failed during building: " << e.what() << "\n";
             exit(EXIT_FAILURE); /* fatal error. */
         }
     }
     else
     {
         static boost::asio::steady_timer reloadTimer(io);
         if (!dbus_configuration::init(modeControlBus, reloadTimer, sensorConfig,
                                       zoneConfig, zoneDetailsConfig))
         {
             return; // configuration not ready
         }
     }

     mgmr = buildSensors(sensorConfig, passiveBus, hostBus);
     zones = buildZones(zoneConfig, zoneDetailsConfig, mgmr, modeControlBus);

     if (0 == zones.size())
     {
         std::cerr << "No zones defined, exiting.\n";
         std::exit(EXIT_FAILURE);
     }

     for (const auto& i : zones)
     {
         std::shared_ptr<boost::asio::steady_timer> timer = timers.emplace_back(
             std::make_shared<boost::asio::steady_timer>(io));
         std::cerr << "pushing zone " << i.first << "\n";
         pidControlLoop(i.second, timer, &isCanceling);
     }
 }

 void tryRestartControlLoops(bool first)
 {
     static int count = 0;
     static const auto delayTime = std::chrono::seconds(10);
     static boost::asio::steady_timer timer(io);
     // try to start a control loop while the loop has been scheduled.
     if (first && count != 0)
     {
         std::cerr
             << "ControlLoops has been scheduled, refresh the loop count\n";
         count = 1;
         return;
     }

     auto restartLbd = [](const boost::system::error_code& error) {
         if (error == boost::asio::error::operation_aborted)
         {
             return;
         }

         // for the last loop, don't elminate the failure of restartControlLoops.
         if (count >= 5)
         {
             restartControlLoops();
             // reset count after succesful restartControlLoops()
             count = 0;
             return;
         }

         // retry when restartControlLoops() has some failure.
         try
         {
             restartControlLoops();
             // reset count after succesful restartControlLoops()
             count = 0;
         }
         catch (const std::exception& e)
         {
             std::cerr << count
                       << " Failed during restartControlLoops, try again: "
                       << e.what() << "\n";
             tryRestartControlLoops(false);
         }
     };
     count++;
     // first time of trying to restart the control loop without a delay
     if (first)
     {
         boost::asio::post(io,
                           std::bind(restartLbd, boost::system::error_code()));
     }
     // re-try control loop, set up a delay.
     else
     {
         timer.expires_after(delayTime);
         timer.async_wait(restartLbd);
     }

     return;
 }

 } // namespace pid_control

 void sighupHandler(const boost::system::error_code& error, int signal_number)
 {
     static boost::asio::steady_timer timer(io);

     if (error)
     {
         std::cout << "Signal " << signal_number
                   << " handler error: " << error.message() << "\n";
         return;
     }

     timer.expires_after(std::chrono::seconds(1));
     timer.async_wait([](const boost::system::error_code ec) {
         if (ec)
         {
             std::cout << "Signal timer error: " << ec.message() << "\n";
             return;
         }

         std::cout << "reloading configuration\n";
         pid_control::tryRestartControlLoops();
     });
     signals.async_wait(sighupHandler);
 }

 int main(int argc, char* argv[])
 {
     loggingPath = "";
     loggingEnabled = false;
     tuningEnabled = false;
     debugEnabled = false;
     coreLoggingEnabled = false;

     CLI::App app{"OpenBMC Fan Control Daemon"};

     app.add_option("-c,--conf", configPath,
                    "Optional parameter to specify configuration at run-time")
         ->check(CLI::ExistingFile);
     app.add_option("-l,--log", loggingPath,
                    "Optional parameter to specify logging folder")
         ->check(CLI::ExistingDirectory);
     app.add_flag("-t,--tuning", tuningEnabled, "Enable or disable tuning");
     app.add_flag("-d,--debug", debugEnabled, "Enable or disable debug mode");
     app.add_flag("-g,--corelogging", coreLoggingEnabled,
                  "Enable or disable logging of core PID loop computations");

     CLI11_PARSE(app, argc, argv);

     static constexpr auto loggingEnablePath = "/etc/thermal.d/logging";
     static constexpr auto tuningEnablePath = "/etc/thermal.d/tuning";
     static constexpr auto debugEnablePath = "/etc/thermal.d/debugging";
     static constexpr auto coreLoggingEnablePath = "/etc/thermal.d/corelogging";

     // Set up default logging path, preferring command line if it was given
     std::string defLoggingPath(loggingPath);
     if (defLoggingPath.empty())
     {
         defLoggingPath = std::filesystem::temp_directory_path();
     }
     else
     {
         // Enable logging, if user explicitly gave path on command line
         loggingEnabled = true;
     }

     // If this file exists, enable logging at runtime
     std::ifstream fsLogging(loggingEnablePath);
     if (fsLogging)
     {
         // Allow logging path to be changed by file content
         std::string altPath;
         std::getline(fsLogging, altPath);
         fsLogging.close();

         if (std::filesystem::exists(altPath))
         {
             loggingPath = altPath;
         }

         loggingEnabled = true;
     }
     if (loggingEnabled)
     {
         std::cerr << "Logging enabled: " << loggingPath << "\n";
     }

     // If this file exists, enable tuning at runtime
     if (std::filesystem::exists(tuningEnablePath))
     {
         tuningEnabled = true;
     }
     if (tuningEnabled)
     {
         std::cerr << "Tuning enabled\n";
     }

     // If this file exists, enable debug mode at runtime
     if (std::filesystem::exists(debugEnablePath))
     {
         debugEnabled = true;
     }

     if (debugEnabled)
     {
         std::cerr << "Debug mode enabled\n";
     }

     // If this file exists, enable core logging at runtime
     if (std::filesystem::exists(coreLoggingEnablePath))
     {
         coreLoggingEnabled = true;
     }
     if (coreLoggingEnabled)
     {
         std::cerr << "Core logging enabled\n";
     }

     static constexpr auto modeRoot = "/xyz/openbmc_project/settings/fanctrl";
     // Create a manager for the ModeBus because we own it.
     sdbusplus::server::manager_t(static_cast<sdbusplus::bus_t&>(modeControlBus),
                                  modeRoot);
     hostBus.request_name("xyz.openbmc_project.Hwmon.external");
     modeControlBus.request_name("xyz.openbmc_project.State.FanCtrl");
     sdbusplus::server::manager_t objManager(modeControlBus, modeRoot);

     // Enable SIGHUP handling to reload JSON config
     signals.async_wait(sighupHandler);

     /*
      * All sensors are managed by one manager, but each zone has a pointer to
      * it.
      */

     pid_control::tryRestartControlLoops();

     io.run();
     return 0;
 }
	/**
	* Copyright 2017 Google Inc.
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "config.h"

	#include "buildjson/buildjson.hpp"
	#include "conf.hpp"
	#include "dbus/dbusconfiguration.hpp"
	#include "interfaces.hpp"
	#include "pid/builder.hpp"
	#include "pid/buildjson.hpp"
	#include "pid/pidloop.hpp"
	#include "pid/tuning.hpp"
	#include "pid/zone.hpp"
	#include "sensors/builder.hpp"
	#include "sensors/buildjson.hpp"
	#include "sensors/manager.hpp"
	#include "util.hpp"

	#include <CLI/CLI.hpp>
	#include <boost/asio/io_context.hpp>
	#include <boost/asio/signal_set.hpp>
	#include <boost/asio/steady_timer.hpp>
	#include <sdbusplus/asio/connection.hpp>
	#include <sdbusplus/bus.hpp>
	#include <sdbusplus/server/manager.hpp>

	#include <chrono>
	#include <filesystem>
	#include <iostream>
	#include <list>
	#include <map>
	#include <memory>
	#include <thread>
	#include <unordered_map>
	#include <utility>
	#include <vector>

	namespace pid_control
	{

	/* The configuration converted sensor list. */
	std::map<std::string, conf::SensorConfig> sensorConfig = {};
	/* The configuration converted PID list. */
	std::map<int64_t, conf::PIDConf> zoneConfig = {};
	/* The configuration converted Zone configuration. */
	std::map<int64_t, conf::ZoneConfig> zoneDetailsConfig = {};

	} // namespace pid_control

	/** the swampd daemon will check for the existence of this file. */
	constexpr auto jsonConfigurationPath = "/usr/share/swampd/config.json";
	std::string configPath = "";

	/* async io context for operation */
	boost::asio::io_context io;
	/* async signal_set for signal handling */
	boost::asio::signal_set signals(io, SIGHUP);

	/* buses for system control */
	static sdbusplus::asio::connection modeControlBus(io);
	static sdbusplus::asio::connection
	hostBus(io, sdbusplus::bus::new_system().release());
	static sdbusplus::asio::connection
	passiveBus(io, sdbusplus::bus::new_system().release());

	namespace pid_control
	{

	void restartControlLoops()
	{
	static SensorManager mgmr;
	static std::unordered_map<int64_t, std::shared_ptr<ZoneInterface>> zones;
	static std::vector<std::shared_ptr<boost::asio::steady_timer>> timers;
	static bool isCanceling = false;

	for (const auto& timer : timers)
	{
	timer->cancel();
	}
	isCanceling = true;
	timers.clear();

	if (zones.size() > 0 && zones.begin()->second.use_count() > 1)
	{
	throw std::runtime_error("wait for count back to 1");
	}
	zones.clear();
	isCanceling = false;

	const std::string& path =
	(configPath.length() > 0) ? configPath : jsonConfigurationPath;

	if (std::filesystem::exists(path))
	{
	/*
	* When building the sensors, if any of the dbus passive ones aren't on
	* the bus, it'll fail immediately.
	*/
	try
	{
	auto jsonData = parseValidateJson(path);
	sensorConfig = buildSensorsFromJson(jsonData);
	std::tie(zoneConfig, zoneDetailsConfig) =
	buildPIDsFromJson(jsonData);
	}
	catch (const std::exception& e)
	{
	std::cerr << "Failed during building: " << e.what() << "\n";
	exit(EXIT_FAILURE); /* fatal error. */
	}
	}
	else
	{
	static boost::asio::steady_timer reloadTimer(io);
	if (!dbus_configuration::init(modeControlBus, reloadTimer, sensorConfig,
	zoneConfig, zoneDetailsConfig))
	{
	return; // configuration not ready
	}
	}

	mgmr = buildSensors(sensorConfig, passiveBus, hostBus);
	zones = buildZones(zoneConfig, zoneDetailsConfig, mgmr, modeControlBus);

	if (0 == zones.size())
	{
	std::cerr << "No zones defined, exiting.\n";
	std::exit(EXIT_FAILURE);
	}

	for (const auto& i : zones)
	{
	std::shared_ptr<boost::asio::steady_timer> timer = timers.emplace_back(
	std::make_shared<boost::asio::steady_timer>(io));
	std::cerr << "pushing zone " << i.first << "\n";
	pidControlLoop(i.second, timer, &isCanceling);
	}
	}

	void tryRestartControlLoops(bool first)
	{
	static int count = 0;
	static const auto delayTime = std::chrono::seconds(10);
	static boost::asio::steady_timer timer(io);
	// try to start a control loop while the loop has been scheduled.
	if (first && count != 0)
	{
	std::cerr
	<< "ControlLoops has been scheduled, refresh the loop count\n";
	count = 1;
	return;
	}

	auto restartLbd = [](const boost::system::error_code& error) {
	if (error == boost::asio::error::operation_aborted)
	{
	return;
	}

	// for the last loop, don't elminate the failure of restartControlLoops.
	if (count >= 5)
	{
	restartControlLoops();
	// reset count after succesful restartControlLoops()
	count = 0;
	return;
	}

	// retry when restartControlLoops() has some failure.
	try
	{
	restartControlLoops();
	// reset count after succesful restartControlLoops()
	count = 0;
	}
	catch (const std::exception& e)
	{
	std::cerr << count
	<< " Failed during restartControlLoops, try again: "
	<< e.what() << "\n";
	tryRestartControlLoops(false);
	}
	};
	count++;
	// first time of trying to restart the control loop without a delay
	if (first)
	{
	boost::asio::post(io,
	std::bind(restartLbd, boost::system::error_code()));
	}
	// re-try control loop, set up a delay.
	else
	{
	timer.expires_after(delayTime);
	timer.async_wait(restartLbd);
	}

	return;
	}

	} // namespace pid_control

	void sighupHandler(const boost::system::error_code& error, int signal_number)
	{
	static boost::asio::steady_timer timer(io);

	if (error)
	{
	std::cout << "Signal " << signal_number
	<< " handler error: " << error.message() << "\n";
	return;
	}

	timer.expires_after(std::chrono::seconds(1));
	timer.async_wait([](const boost::system::error_code ec) {
	if (ec)
	{
	std::cout << "Signal timer error: " << ec.message() << "\n";
	return;
	}

	std::cout << "reloading configuration\n";
	pid_control::tryRestartControlLoops();
	});
	signals.async_wait(sighupHandler);
	}

	int main(int argc, char* argv[])
	{
	loggingPath = "";
	loggingEnabled = false;
	tuningEnabled = false;
	debugEnabled = false;
	coreLoggingEnabled = false;

	CLI::App app{"OpenBMC Fan Control Daemon"};

	app.add_option("-c,--conf", configPath,
	"Optional parameter to specify configuration at run-time")
	->check(CLI::ExistingFile);
	app.add_option("-l,--log", loggingPath,
	"Optional parameter to specify logging folder")
	->check(CLI::ExistingDirectory);
	app.add_flag("-t,--tuning", tuningEnabled, "Enable or disable tuning");
	app.add_flag("-d,--debug", debugEnabled, "Enable or disable debug mode");
	app.add_flag("-g,--corelogging", coreLoggingEnabled,
	"Enable or disable logging of core PID loop computations");

	CLI11_PARSE(app, argc, argv);

	static constexpr auto loggingEnablePath = "/etc/thermal.d/logging";
	static constexpr auto tuningEnablePath = "/etc/thermal.d/tuning";
	static constexpr auto debugEnablePath = "/etc/thermal.d/debugging";
	static constexpr auto coreLoggingEnablePath = "/etc/thermal.d/corelogging";

	// Set up default logging path, preferring command line if it was given
	std::string defLoggingPath(loggingPath);
	if (defLoggingPath.empty())
	{
	defLoggingPath = std::filesystem::temp_directory_path();
	}
	else
	{
	// Enable logging, if user explicitly gave path on command line
	loggingEnabled = true;
	}

	// If this file exists, enable logging at runtime
	std::ifstream fsLogging(loggingEnablePath);
	if (fsLogging)
	{
	// Allow logging path to be changed by file content
	std::string altPath;
	std::getline(fsLogging, altPath);
	fsLogging.close();

	if (std::filesystem::exists(altPath))
	{
	loggingPath = altPath;
	}

	loggingEnabled = true;
	}
	if (loggingEnabled)
	{
	std::cerr << "Logging enabled: " << loggingPath << "\n";
	}

	// If this file exists, enable tuning at runtime
	if (std::filesystem::exists(tuningEnablePath))
	{
	tuningEnabled = true;
	}
	if (tuningEnabled)
	{
	std::cerr << "Tuning enabled\n";
	}

	// If this file exists, enable debug mode at runtime
	if (std::filesystem::exists(debugEnablePath))
	{
	debugEnabled = true;
	}

	if (debugEnabled)
	{
	std::cerr << "Debug mode enabled\n";
	}

	// If this file exists, enable core logging at runtime
	if (std::filesystem::exists(coreLoggingEnablePath))
	{
	coreLoggingEnabled = true;
	}
	if (coreLoggingEnabled)
	{
	std::cerr << "Core logging enabled\n";
	}

	static constexpr auto modeRoot = "/xyz/openbmc_project/settings/fanctrl";
	// Create a manager for the ModeBus because we own it.
	sdbusplus::server::manager_t(static_cast<sdbusplus::bus_t&>(modeControlBus),
	modeRoot);
	hostBus.request_name("xyz.openbmc_project.Hwmon.external");
	modeControlBus.request_name("xyz.openbmc_project.State.FanCtrl");
	sdbusplus::server::manager_t objManager(modeControlBus, modeRoot);

	// Enable SIGHUP handling to reload JSON config
	signals.async_wait(sighupHandler);

	/*
	* All sensors are managed by one manager, but each zone has a pointer to
	* it.
	*/

	pid_control::tryRestartControlLoops();

	io.run();
	return 0;
	}