extensions/openpower-pels/host_notifier.cpp - openbmc/phosphor-logging - Gitiles

 /**
  * Copyright © 2019 IBM Corporation
  *
  * 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 "host_notifier.hpp"

 #include <phosphor-logging/log.hpp>

 namespace openpower::pels
 {

 const auto subscriptionName = "PELHostNotifier";
 const size_t maxRetryAttempts = 15;

 using namespace phosphor::logging;

 HostNotifier::HostNotifier(Repository& repo, DataInterfaceBase& dataIface,
                            std::unique_ptr<HostInterface> hostIface) :
     _repo(repo),
     _dataIface(dataIface), _hostIface(std::move(hostIface)),
     _retryTimer(_hostIface->getEvent(),
                 std::bind(std::mem_fn(&HostNotifier::retryTimerExpired), this)),
     _hostFullTimer(
         _hostIface->getEvent(),
         std::bind(std::mem_fn(&HostNotifier::hostFullTimerExpired), this))
 {
     // Subscribe to be told about new PELs.
     _repo.subscribeToAdds(subscriptionName,
                           std::bind(std::mem_fn(&HostNotifier::newLogCallback),
                                     this, std::placeholders::_1));

     // Add any existing PELs to the queue to send them if necessary.
     _repo.for_each(std::bind(std::mem_fn(&HostNotifier::addPELToQueue), this,
                              std::placeholders::_1));

     // Subscribe to be told about host state changes.
     _dataIface.subscribeToHostStateChange(
         subscriptionName,
         std::bind(std::mem_fun(&HostNotifier::hostStateChange), this,
                   std::placeholders::_1));

     // Set the function to call when the async reponse is received.
     _hostIface->setResponseFunction(
         std::bind(std::mem_fn(&HostNotifier::commandResponse), this,
                   std::placeholders::_1));

     // Start sending logs if the host is running
     if (!_pelQueue.empty() && _dataIface.isHostUp())
     {
         doNewLogNotify();
     }
 }

 HostNotifier::~HostNotifier()
 {
     _repo.unsubscribeFromAdds(subscriptionName);
     _dataIface.unsubscribeFromHostStateChange(subscriptionName);
 }

 bool HostNotifier::addPELToQueue(const PEL& pel)
 {
     if (enqueueRequired(pel.id()))
     {
         _pelQueue.push_back(pel.id());
     }

     // Return false so that Repo::for_each keeps going.
     return false;
 }

 bool HostNotifier::enqueueRequired(uint32_t id) const
 {
     bool required = true;
     Repository::LogID i{Repository::LogID::Pel{id}};

     if (auto attributes = _repo.getPELAttributes(i); attributes)
     {
         auto a = attributes.value().get();

         if ((a.hostState == TransmissionState::acked) ||
             (a.hostState == TransmissionState::badPEL))
         {
             required = false;
         }
         else if (a.actionFlags.test(hiddenFlagBit) &&
                  (a.hmcState == TransmissionState::acked))
         {
             required = false;
         }
         else if (a.actionFlags.test(dontReportToHostFlagBit))
         {
             required = false;
         }
     }
     else
     {
         using namespace phosphor::logging;
         log<level::ERR>("Host Enqueue: Unable to find PEL ID in repository",
                         entry("PEL_ID=0x%X", id));
         required = false;
     }

     return required;
 }

 bool HostNotifier::notifyRequired(uint32_t id) const
 {
     bool notify = true;
     Repository::LogID i{Repository::LogID::Pel{id}};

     if (auto attributes = _repo.getPELAttributes(i); attributes)
     {
         // If already acked by the host, don't send again.
         // (A safety check as it shouldn't get to this point.)
         auto a = attributes.value().get();
         if (a.hostState == TransmissionState::acked)
         {
             notify = false;
         }
         else if (a.actionFlags.test(hiddenFlagBit))
         {
             // If hidden and acked (or will be) acked by the HMC,
             // also don't send it. (HMC management can come and
             // go at any time)
             if ((a.hmcState == TransmissionState::acked) ||
                 _dataIface.isHMCManaged())
             {
                 notify = false;
             }
         }
     }
     else
     {
         // Must have been deleted since put on the queue.
         notify = false;
     }

     return notify;
 }

 void HostNotifier::newLogCallback(const PEL& pel)
 {
     if (!enqueueRequired(pel.id()))
     {
         return;
     }

     _pelQueue.push_back(pel.id());

     // Notify shouldn't happen if host is down or full
     if (!_dataIface.isHostUp() || _hostFull)
     {
         return;
     }

     // Dispatch a command now if there isn't currently a command
     // in progress and this is the first log in the queue or it
     // previously gave up from a hard failure.
     auto inProgress = (_inProgressPEL != 0) || _hostIface->cmdInProgress() ||
                       _retryTimer.isEnabled();

     auto firstPEL = _pelQueue.size() == 1;
     auto gaveUp = _retryCount >= maxRetryAttempts;

     if (!inProgress && (firstPEL || gaveUp))
     {
         _retryCount = 0;

         // Send a log, but from the event loop, not from here.
         scheduleDispatch();
     }
 }

 void HostNotifier::scheduleDispatch()
 {
     _dispatcher = std::make_unique<sdeventplus::source::Defer>(
         _hostIface->getEvent(), std::bind(std::mem_fn(&HostNotifier::dispatch),
                                           this, std::placeholders::_1));
 }

 void HostNotifier::dispatch(sdeventplus::source::EventBase& source)
 {
     _dispatcher.reset();

     doNewLogNotify();
 }

 void HostNotifier::doNewLogNotify()
 {
     if (!_dataIface.isHostUp() || _retryTimer.isEnabled() ||
         _hostFullTimer.isEnabled())
     {
         return;
     }

     if (_retryCount >= maxRetryAttempts)
     {
         // Give up until a new log comes in.
         if (_retryCount == maxRetryAttempts)
         {
             // If this were to really happen, the PLDM interface
             // would be down and isolating that shouldn't left to
             // a logging daemon, so just trace.  Also, this will start
             // trying again when the next new log comes in.
             log<level::ERR>(
                 "PEL Host notifier hit max retry attempts. Giving up for now.",
                 entry("PEL_ID=0x%X", _pelQueue.front()));
         }
         return;
     }

     bool doNotify = false;
     uint32_t id = 0;

     // Find the PEL to send
     while (!doNotify && !_pelQueue.empty())
     {
         id = _pelQueue.front();
         _pelQueue.pop_front();

         if (notifyRequired(id))
         {
             doNotify = true;
         }
     }

     if (doNotify)
     {
         // Get the size using the repo attributes
         Repository::LogID i{Repository::LogID::Pel{id}};
         if (auto attributes = _repo.getPELAttributes(i); attributes)
         {
             auto size = static_cast<size_t>(
                 std::filesystem::file_size((*attributes).get().path));
             auto rc = _hostIface->sendNewLogCmd(id, size);

             if (rc == CmdStatus::success)
             {
                 _inProgressPEL = id;
             }
             else
             {
                 // It failed.  Retry
                 log<level::ERR>("PLDM send failed", entry("PEL_ID=0x%X", id));
                 _pelQueue.push_front(id);
                 _inProgressPEL = 0;
                 _retryTimer.restartOnce(_hostIface->getSendRetryDelay());
             }
         }
         else
         {
             log<level::ERR>("PEL ID not in repository.  Cannot notify host",
                             entry("PEL_ID=0x%X", id));
         }
     }
 }

 void HostNotifier::hostStateChange(bool hostUp)
 {
     _retryCount = 0;
     _hostFull = false;

     if (hostUp && !_pelQueue.empty())
     {
         doNewLogNotify();
     }
     else if (!hostUp)
     {
         stopCommand();

         // Reset the state on any PELs that were sent but not acked back
         // to new so they'll get sent again.
         for (auto id : _sentPELs)
         {
             _pelQueue.push_back(id);
             _repo.setPELHostTransState(id, TransmissionState::newPEL);
         }

         _sentPELs.clear();

         if (_hostFullTimer.isEnabled())
         {
             _hostFullTimer.setEnabled(false);
         }
     }
 }

 void HostNotifier::commandResponse(ResponseStatus status)
 {
     auto id = _inProgressPEL;
     _inProgressPEL = 0;

     if (status == ResponseStatus::success)
     {
         _retryCount = 0;

         _sentPELs.push_back(id);

         _repo.setPELHostTransState(id, TransmissionState::sent);

         // If the host is full, don't send off the next PEL
         if (!_hostFull && !_pelQueue.empty())
         {
             doNewLogNotify();
         }
     }
     else
     {
         log<level::ERR>("PLDM command response failure",
                         entry("PEL_ID=0x%X", id));
         // Retry
         _pelQueue.push_front(id);
         _retryTimer.restartOnce(_hostIface->getReceiveRetryDelay());
     }
 }

 void HostNotifier::retryTimerExpired()
 {
     if (_dataIface.isHostUp())
     {
         log<level::INFO>("Attempting command retry",
                          entry("PEL_ID=0x%X", _pelQueue.front()));
         _retryCount++;
         doNewLogNotify();
     }
 }

 void HostNotifier::hostFullTimerExpired()
 {
     doNewLogNotify();
 }

 void HostNotifier::stopCommand()
 {
     _retryCount = 0;

     if (_inProgressPEL != 0)
     {
         _pelQueue.push_front(_inProgressPEL);
         _inProgressPEL = 0;
     }

     if (_retryTimer.isEnabled())
     {
         _retryTimer.setEnabled(false);
     }

     if (_hostIface->cmdInProgress())
     {
         _hostIface->cancelCmd();
     }
 }

 void HostNotifier::ackPEL(uint32_t id)
 {
     _repo.setPELHostTransState(id, TransmissionState::acked);

     // No longer just 'sent', so remove it from the sent list.
     auto sent = std::find(_sentPELs.begin(), _sentPELs.end(), id);
     if (sent != _sentPELs.end())
     {
         _sentPELs.erase(sent);
     }

     // An ack means the host is no longer full
     if (_hostFullTimer.isEnabled())
     {
         _hostFullTimer.setEnabled(false);
     }

     if (_hostFull)
     {
         _hostFull = false;

         // Start sending PELs again, from the event loop
         if (!_pelQueue.empty())
         {
             scheduleDispatch();
         }
     }
 }

 void HostNotifier::setHostFull(uint32_t id)
 {
     log<level::INFO>("Received Host full indication", entry("PEL_ID=0x%X", id));

     _hostFull = true;

     // This PEL needs to get re-sent
     auto sent = std::find(_sentPELs.begin(), _sentPELs.end(), id);
     if (sent != _sentPELs.end())
     {
         _sentPELs.erase(sent);
         _repo.setPELHostTransState(id, TransmissionState::newPEL);

         if (std::find(_pelQueue.begin(), _pelQueue.end(), id) ==
             _pelQueue.end())
         {
             _pelQueue.push_front(id);
         }
     }

     // The only PELs that will be sent when the
     // host is full is from this timer callback.
     if (!_hostFullTimer.isEnabled())
     {
         _hostFullTimer.restartOnce(_hostIface->getHostFullRetryDelay());
     }
 }

 } // namespace openpower::pels
	/**
	* Copyright © 2019 IBM Corporation
	*
	* 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 "host_notifier.hpp"

	#include <phosphor-logging/log.hpp>

	namespace openpower::pels
	{

	const auto subscriptionName = "PELHostNotifier";
	const size_t maxRetryAttempts = 15;

	using namespace phosphor::logging;

	HostNotifier::HostNotifier(Repository& repo, DataInterfaceBase& dataIface,
	std::unique_ptr<HostInterface> hostIface) :
	_repo(repo),
	_dataIface(dataIface), _hostIface(std::move(hostIface)),
	_retryTimer(_hostIface->getEvent(),
	std::bind(std::mem_fn(&HostNotifier::retryTimerExpired), this)),
	_hostFullTimer(
	_hostIface->getEvent(),
	std::bind(std::mem_fn(&HostNotifier::hostFullTimerExpired), this))
	{
	// Subscribe to be told about new PELs.
	_repo.subscribeToAdds(subscriptionName,
	std::bind(std::mem_fn(&HostNotifier::newLogCallback),
	this, std::placeholders::_1));

	// Add any existing PELs to the queue to send them if necessary.
	_repo.for_each(std::bind(std::mem_fn(&HostNotifier::addPELToQueue), this,
	std::placeholders::_1));

	// Subscribe to be told about host state changes.
	_dataIface.subscribeToHostStateChange(
	subscriptionName,
	std::bind(std::mem_fun(&HostNotifier::hostStateChange), this,
	std::placeholders::_1));

	// Set the function to call when the async reponse is received.
	_hostIface->setResponseFunction(
	std::bind(std::mem_fn(&HostNotifier::commandResponse), this,
	std::placeholders::_1));

	// Start sending logs if the host is running
	if (!_pelQueue.empty() && _dataIface.isHostUp())
	{
	doNewLogNotify();
	}
	}

	HostNotifier::~HostNotifier()
	{
	_repo.unsubscribeFromAdds(subscriptionName);
	_dataIface.unsubscribeFromHostStateChange(subscriptionName);
	}

	bool HostNotifier::addPELToQueue(const PEL& pel)
	{
	if (enqueueRequired(pel.id()))
	{
	_pelQueue.push_back(pel.id());
	}

	// Return false so that Repo::for_each keeps going.
	return false;
	}

	bool HostNotifier::enqueueRequired(uint32_t id) const
	{
	bool required = true;
	Repository::LogID i{Repository::LogID::Pel{id}};

	if (auto attributes = _repo.getPELAttributes(i); attributes)
	{
	auto a = attributes.value().get();

	if ((a.hostState == TransmissionState::acked) \|\|
	(a.hostState == TransmissionState::badPEL))
	{
	required = false;
	}
	else if (a.actionFlags.test(hiddenFlagBit) &&
	(a.hmcState == TransmissionState::acked))
	{
	required = false;
	}
	else if (a.actionFlags.test(dontReportToHostFlagBit))
	{
	required = false;
	}
	}
	else
	{
	using namespace phosphor::logging;
	log<level::ERR>("Host Enqueue: Unable to find PEL ID in repository",
	entry("PEL_ID=0x%X", id));
	required = false;
	}

	return required;
	}

	bool HostNotifier::notifyRequired(uint32_t id) const
	{
	bool notify = true;
	Repository::LogID i{Repository::LogID::Pel{id}};

	if (auto attributes = _repo.getPELAttributes(i); attributes)
	{
	// If already acked by the host, don't send again.
	// (A safety check as it shouldn't get to this point.)
	auto a = attributes.value().get();
	if (a.hostState == TransmissionState::acked)
	{
	notify = false;
	}
	else if (a.actionFlags.test(hiddenFlagBit))
	{
	// If hidden and acked (or will be) acked by the HMC,
	// also don't send it. (HMC management can come and
	// go at any time)
	if ((a.hmcState == TransmissionState::acked) \|\|
	_dataIface.isHMCManaged())
	{
	notify = false;
	}
	}
	}
	else
	{
	// Must have been deleted since put on the queue.
	notify = false;
	}

	return notify;
	}

	void HostNotifier::newLogCallback(const PEL& pel)
	{
	if (!enqueueRequired(pel.id()))
	{
	return;
	}

	_pelQueue.push_back(pel.id());

	// Notify shouldn't happen if host is down or full
	if (!_dataIface.isHostUp() \|\| _hostFull)
	{
	return;
	}

	// Dispatch a command now if there isn't currently a command
	// in progress and this is the first log in the queue or it
	// previously gave up from a hard failure.
	auto inProgress = (_inProgressPEL != 0) \|\| _hostIface->cmdInProgress() \|\|
	_retryTimer.isEnabled();

	auto firstPEL = _pelQueue.size() == 1;
	auto gaveUp = _retryCount >= maxRetryAttempts;

	if (!inProgress && (firstPEL \|\| gaveUp))
	{
	_retryCount = 0;

	// Send a log, but from the event loop, not from here.
	scheduleDispatch();
	}
	}

	void HostNotifier::scheduleDispatch()
	{
	_dispatcher = std::make_unique<sdeventplus::source::Defer>(
	_hostIface->getEvent(), std::bind(std::mem_fn(&HostNotifier::dispatch),
	this, std::placeholders::_1));
	}

	void HostNotifier::dispatch(sdeventplus::source::EventBase& source)
	{
	_dispatcher.reset();

	doNewLogNotify();
	}

	void HostNotifier::doNewLogNotify()
	{
	if (!_dataIface.isHostUp() \|\| _retryTimer.isEnabled() \|\|
	_hostFullTimer.isEnabled())
	{
	return;
	}

	if (_retryCount >= maxRetryAttempts)
	{
	// Give up until a new log comes in.
	if (_retryCount == maxRetryAttempts)
	{
	// If this were to really happen, the PLDM interface
	// would be down and isolating that shouldn't left to
	// a logging daemon, so just trace. Also, this will start
	// trying again when the next new log comes in.
	log<level::ERR>(
	"PEL Host notifier hit max retry attempts. Giving up for now.",
	entry("PEL_ID=0x%X", _pelQueue.front()));
	}
	return;
	}

	bool doNotify = false;
	uint32_t id = 0;

	// Find the PEL to send
	while (!doNotify && !_pelQueue.empty())
	{
	id = _pelQueue.front();
	_pelQueue.pop_front();

	if (notifyRequired(id))
	{
	doNotify = true;
	}
	}

	if (doNotify)
	{
	// Get the size using the repo attributes
	Repository::LogID i{Repository::LogID::Pel{id}};
	if (auto attributes = _repo.getPELAttributes(i); attributes)
	{
	auto size = static_cast<size_t>(
	std::filesystem::file_size((*attributes).get().path));
	auto rc = _hostIface->sendNewLogCmd(id, size);

	if (rc == CmdStatus::success)
	{
	_inProgressPEL = id;
	}
	else
	{
	// It failed. Retry
	log<level::ERR>("PLDM send failed", entry("PEL_ID=0x%X", id));
	_pelQueue.push_front(id);
	_inProgressPEL = 0;
	_retryTimer.restartOnce(_hostIface->getSendRetryDelay());
	}
	}
	else
	{
	log<level::ERR>("PEL ID not in repository. Cannot notify host",
	entry("PEL_ID=0x%X", id));
	}
	}
	}

	void HostNotifier::hostStateChange(bool hostUp)
	{
	_retryCount = 0;
	_hostFull = false;

	if (hostUp && !_pelQueue.empty())
	{
	doNewLogNotify();
	}
	else if (!hostUp)
	{
	stopCommand();

	// Reset the state on any PELs that were sent but not acked back
	// to new so they'll get sent again.
	for (auto id : _sentPELs)
	{
	_pelQueue.push_back(id);
	_repo.setPELHostTransState(id, TransmissionState::newPEL);
	}

	_sentPELs.clear();

	if (_hostFullTimer.isEnabled())
	{
	_hostFullTimer.setEnabled(false);
	}
	}
	}

	void HostNotifier::commandResponse(ResponseStatus status)
	{
	auto id = _inProgressPEL;
	_inProgressPEL = 0;

	if (status == ResponseStatus::success)
	{
	_retryCount = 0;

	_sentPELs.push_back(id);

	_repo.setPELHostTransState(id, TransmissionState::sent);

	// If the host is full, don't send off the next PEL
	if (!_hostFull && !_pelQueue.empty())
	{
	doNewLogNotify();
	}
	}
	else
	{
	log<level::ERR>("PLDM command response failure",
	entry("PEL_ID=0x%X", id));
	// Retry
	_pelQueue.push_front(id);
	_retryTimer.restartOnce(_hostIface->getReceiveRetryDelay());
	}
	}

	void HostNotifier::retryTimerExpired()
	{
	if (_dataIface.isHostUp())
	{
	log<level::INFO>("Attempting command retry",
	entry("PEL_ID=0x%X", _pelQueue.front()));
	_retryCount++;
	doNewLogNotify();
	}
	}

	void HostNotifier::hostFullTimerExpired()
	{
	doNewLogNotify();
	}

	void HostNotifier::stopCommand()
	{
	_retryCount = 0;

	if (_inProgressPEL != 0)
	{
	_pelQueue.push_front(_inProgressPEL);
	_inProgressPEL = 0;
	}

	if (_retryTimer.isEnabled())
	{
	_retryTimer.setEnabled(false);
	}

	if (_hostIface->cmdInProgress())
	{
	_hostIface->cancelCmd();
	}
	}

	void HostNotifier::ackPEL(uint32_t id)
	{
	_repo.setPELHostTransState(id, TransmissionState::acked);

	// No longer just 'sent', so remove it from the sent list.
	auto sent = std::find(_sentPELs.begin(), _sentPELs.end(), id);
	if (sent != _sentPELs.end())
	{
	_sentPELs.erase(sent);
	}

	// An ack means the host is no longer full
	if (_hostFullTimer.isEnabled())
	{
	_hostFullTimer.setEnabled(false);
	}

	if (_hostFull)
	{
	_hostFull = false;

	// Start sending PELs again, from the event loop
	if (!_pelQueue.empty())
	{
	scheduleDispatch();
	}
	}
	}

	void HostNotifier::setHostFull(uint32_t id)
	{
	log<level::INFO>("Received Host full indication", entry("PEL_ID=0x%X", id));

	_hostFull = true;

	// This PEL needs to get re-sent
	auto sent = std::find(_sentPELs.begin(), _sentPELs.end(), id);
	if (sent != _sentPELs.end())
	{
	_sentPELs.erase(sent);
	_repo.setPELHostTransState(id, TransmissionState::newPEL);

	if (std::find(_pelQueue.begin(), _pelQueue.end(), id) ==
	_pelQueue.end())
	{
	_pelQueue.push_front(id);
	}
	}

	// The only PELs that will be sent when the
	// host is full is from this timer callback.
	if (!_hostFullTimer.isEnabled())
	{
	_hostFullTimer.restartOnce(_hostIface->getHostFullRetryDelay());
	}
	}

	} // namespace openpower::pels