extensions/openpower-pels/repository.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 "repository.hpp"

 #include <sys/stat.h>

 #include <fstream>
 #include <phosphor-logging/log.hpp>
 #include <xyz/openbmc_project/Common/File/error.hpp>

 namespace openpower
 {
 namespace pels
 {

 namespace fs = std::filesystem;
 using namespace phosphor::logging;
 namespace file_error = sdbusplus::xyz::openbmc_project::Common::File::Error;

 constexpr size_t warningPercentage = 95;

 /**
  * @brief Returns the amount of space the file uses on disk.
  *
  * This is different than just the regular size of the file.
  *
  * @param[in] file - The file to get the size of
  *
  * @return size_t The disk space the file uses
  */
 size_t getFileDiskSize(const std::filesystem::path& file)
 {
     constexpr size_t statBlockSize = 512;
     struct stat statData;
     auto rc = stat(file.c_str(), &statData);
     if (rc != 0)
     {
         auto e = errno;
         std::string msg = "call to stat() failed on " + file.native() +
                           " with errno " + std::to_string(e);
         log<level::ERR>(msg.c_str());
         abort();
     }

     return statData.st_blocks * statBlockSize;
 }

 Repository::Repository(const std::filesystem::path& basePath, size_t repoSize,
                        size_t maxNumPELs) :
     _logPath(basePath / "logs"),
     _maxRepoSize(repoSize), _maxNumPELs(maxNumPELs)
 {
     if (!fs::exists(_logPath))
     {
         fs::create_directories(_logPath);
     }

     restore();
 }

 void Repository::restore()
 {
     for (auto& dirEntry : fs::directory_iterator(_logPath))
     {
         try
         {
             if (!fs::is_regular_file(dirEntry.path()))
             {
                 continue;
             }

             std::ifstream file{dirEntry.path()};
             std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
                                       std::istreambuf_iterator<char>()};
             file.close();

             PEL pel{data};
             if (pel.valid())
             {
                 // If the host hasn't acked it, reset the host state so
                 // it will get sent up again.
                 if (pel.hostTransmissionState() == TransmissionState::sent)
                 {
                     pel.setHostTransmissionState(TransmissionState::newPEL);
                     try
                     {
                         write(pel, dirEntry.path());
                     }
                     catch (std::exception& e)
                     {
                         log<level::ERR>(
                             "Failed to save PEL after updating host state",
                             entry("PELID=0x%X", pel.id()));
                     }
                 }

                 PELAttributes attributes{dirEntry.path(),
                                          getFileDiskSize(dirEntry.path()),
                                          pel.privateHeader().creatorID(),
                                          pel.userHeader().severity(),
                                          pel.userHeader().actionFlags(),
                                          pel.hostTransmissionState(),
                                          pel.hmcTransmissionState()};

                 using pelID = LogID::Pel;
                 using obmcID = LogID::Obmc;
                 _pelAttributes.emplace(
                     LogID(pelID(pel.id()), obmcID(pel.obmcLogID())),
                     attributes);

                 updateRepoStats(attributes, true);
             }
             else
             {
                 log<level::ERR>(
                     "Found invalid PEL file while restoring.  Removing.",
                     entry("FILENAME=%s", dirEntry.path().c_str()));
                 fs::remove(dirEntry.path());
             }
         }
         catch (std::exception& e)
         {
             log<level::ERR>("Hit exception while restoring PEL File",
                             entry("FILENAME=%s", dirEntry.path().c_str()),
                             entry("ERROR=%s", e.what()));
         }
     }
 }

 std::string Repository::getPELFilename(uint32_t pelID, const BCDTime& time)
 {
     char name[50];
     sprintf(name, "%.2X%.2X%.2X%.2X%.2X%.2X%.2X%.2X_%.8X", time.yearMSB,
             time.yearLSB, time.month, time.day, time.hour, time.minutes,
             time.seconds, time.hundredths, pelID);
     return std::string{name};
 }

 void Repository::add(std::unique_ptr<PEL>& pel)
 {
     pel->setHostTransmissionState(TransmissionState::newPEL);
     pel->setHMCTransmissionState(TransmissionState::newPEL);

     auto path = _logPath / getPELFilename(pel->id(), pel->commitTime());

     write(*(pel.get()), path);

     PELAttributes attributes{path,
                              getFileDiskSize(path),
                              pel->privateHeader().creatorID(),
                              pel->userHeader().severity(),
                              pel->userHeader().actionFlags(),
                              pel->hostTransmissionState(),
                              pel->hmcTransmissionState()};

     using pelID = LogID::Pel;
     using obmcID = LogID::Obmc;
     _pelAttributes.emplace(LogID(pelID(pel->id()), obmcID(pel->obmcLogID())),
                            attributes);

     updateRepoStats(attributes, true);

     processAddCallbacks(*pel);
 }

 void Repository::write(const PEL& pel, const fs::path& path)
 {
     std::ofstream file{path, std::ios::binary};

     if (!file.good())
     {
         // If this fails, the filesystem is probably full so it isn't like
         // we could successfully create yet another error log here.
         auto e = errno;
         fs::remove(path);
         log<level::ERR>("Unable to open PEL file for writing",
                         entry("ERRNO=%d", e), entry("PATH=%s", path.c_str()));
         throw file_error::Open();
     }

     auto data = pel.data();
     file.write(reinterpret_cast<const char*>(data.data()), data.size());

     if (file.fail())
     {
         // Same note as above about not being able to create an error log
         // for this case even if we wanted.
         auto e = errno;
         file.close();
         fs::remove(path);
         log<level::ERR>("Unable to write PEL file", entry("ERRNO=%d", e),
                         entry("PATH=%s", path.c_str()));
         throw file_error::Write();
     }
 }

 void Repository::remove(const LogID& id)
 {
     auto pel = findPEL(id);
     if (pel != _pelAttributes.end())
     {
         updateRepoStats(pel->second, false);

         log<level::DEBUG>("Removing PEL from repository",
                           entry("PEL_ID=0x%X", pel->first.pelID.id),
                           entry("OBMC_LOG_ID=%d", pel->first.obmcID.id));
         fs::remove(pel->second.path);
         _pelAttributes.erase(pel);

         processDeleteCallbacks(pel->first.pelID.id);
     }
     else
     {
         log<level::DEBUG>("Could not find PEL to remove",
                           entry("PEL_ID=0x%X", id.pelID.id),
                           entry("OBMC_LOG_ID=%d", id.obmcID.id));
     }
 }

 std::optional<std::vector<uint8_t>> Repository::getPELData(const LogID& id)
 {
     auto pel = findPEL(id);
     if (pel != _pelAttributes.end())
     {
         std::ifstream file{pel->second.path.c_str()};
         if (!file.good())
         {
             auto e = errno;
             log<level::ERR>("Unable to open PEL file", entry("ERRNO=%d", e),
                             entry("PATH=%s", pel->second.path.c_str()));
             throw file_error::Open();
         }

         std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
                                   std::istreambuf_iterator<char>()};
         return data;
     }

     return std::nullopt;
 }

 std::optional<sdbusplus::message::unix_fd> Repository::getPELFD(const LogID& id)
 {
     auto pel = findPEL(id);
     if (pel != _pelAttributes.end())
     {
         FILE* fp = fopen(pel->second.path.c_str(), "rb");

         if (fp == nullptr)
         {
             auto e = errno;
             log<level::ERR>("Unable to open PEL File", entry("ERRNO=%d", e),
                             entry("PATH=%s", pel->second.path.c_str()));
             throw file_error::Open();
         }

         // Must leave the file open here.  It will be closed by sdbusplus
         // when it sends it back over D-Bus.

         return fileno(fp);
     }
     return std::nullopt;
 }

 void Repository::for_each(ForEachFunc func) const
 {
     for (const auto& [id, attributes] : _pelAttributes)
     {
         std::ifstream file{attributes.path};

         if (!file.good())
         {
             auto e = errno;
             log<level::ERR>("Repository::for_each: Unable to open PEL file",
                             entry("ERRNO=%d", e),
                             entry("PATH=%s", attributes.path.c_str()));
             continue;
         }

         std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
                                   std::istreambuf_iterator<char>()};
         file.close();

         PEL pel{data};

         try
         {
             if (func(pel))
             {
                 break;
             }
         }
         catch (std::exception& e)
         {
             log<level::ERR>("Repository::for_each function exception",
                             entry("ERROR=%s", e.what()));
         }
     }
 }

 void Repository::processAddCallbacks(const PEL& pel) const
 {
     for (auto& [name, func] : _addSubscriptions)
     {
         try
         {
             func(pel);
         }
         catch (std::exception& e)
         {
             log<level::ERR>("PEL Repository add callback exception",
                             entry("NAME=%s", name.c_str()),
                             entry("ERROR=%s", e.what()));
         }
     }
 }

 void Repository::processDeleteCallbacks(uint32_t id) const
 {
     for (auto& [name, func] : _deleteSubscriptions)
     {
         try
         {
             func(id);
         }
         catch (std::exception& e)
         {
             log<level::ERR>("PEL Repository delete callback exception",
                             entry("NAME=%s", name.c_str()),
                             entry("ERROR=%s", e.what()));
         }
     }
 }

 std::optional<std::reference_wrapper<const Repository::PELAttributes>>
     Repository::getPELAttributes(const LogID& id) const
 {
     auto pel = findPEL(id);
     if (pel != _pelAttributes.end())
     {
         return pel->second;
     }

     return std::nullopt;
 }

 void Repository::setPELHostTransState(uint32_t pelID, TransmissionState state)
 {
     LogID id{LogID::Pel{pelID}};
     auto attr = std::find_if(_pelAttributes.begin(), _pelAttributes.end(),
                              [&id](const auto& a) { return a.first == id; });

     if ((attr != _pelAttributes.end()) && (attr->second.hostState != state))
     {
         PELUpdateFunc func = [state](PEL& pel) {
             pel.setHostTransmissionState(state);
         };

         try
         {
             updatePEL(attr->second.path, func);

             attr->second.hostState = state;
         }
         catch (std::exception& e)
         {
             log<level::ERR>("Unable to update PEL host transmission state",
                             entry("PATH=%s", attr->second.path.c_str()),
                             entry("ERROR=%s", e.what()));
         }
     }
 }

 void Repository::setPELHMCTransState(uint32_t pelID, TransmissionState state)
 {
     LogID id{LogID::Pel{pelID}};
     auto attr = std::find_if(_pelAttributes.begin(), _pelAttributes.end(),
                              [&id](const auto& a) { return a.first == id; });

     if ((attr != _pelAttributes.end()) && (attr->second.hmcState != state))
     {
         PELUpdateFunc func = [state](PEL& pel) {
             pel.setHMCTransmissionState(state);
         };

         try
         {
             updatePEL(attr->second.path, func);

             attr->second.hmcState = state;
         }
         catch (std::exception& e)
         {
             log<level::ERR>("Unable to update PEL HMC transmission state",
                             entry("PATH=%s", attr->second.path.c_str()),
                             entry("ERROR=%s", e.what()));
         }
     }
 }

 void Repository::updatePEL(const fs::path& path, PELUpdateFunc updateFunc)
 {
     std::ifstream file{path};
     std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
                               std::istreambuf_iterator<char>()};
     file.close();

     PEL pel{data};

     if (pel.valid())
     {
         updateFunc(pel);

         write(pel, path);
     }
     else
     {
         throw std::runtime_error(
             "Unable to read a valid PEL when trying to update it");
     }
 }

 bool Repository::isServiceableSev(const PELAttributes& pel)
 {
     auto sevType = static_cast<SeverityType>(pel.severity & 0xF0);
     auto sevPVEntry =
         pel_values::findByValue(pel.severity, pel_values::severityValues);
     std::string sevName = std::get<pel_values::registryNamePos>(*sevPVEntry);

     bool check1 = (sevType == SeverityType::predictive) ||
                   (sevType == SeverityType::unrecoverable) ||
                   (sevType == SeverityType::critical);

     bool check2 = ((sevType == SeverityType::recovered) ||
                    (sevName == "symptom_recovered")) &&
                   !pel.actionFlags.test(hiddenFlagBit);

     bool check3 = (sevName == "symptom_predictive") ||
                   (sevName == "symptom_unrecoverable") ||
                   (sevName == "symptom_critical");

     return check1 || check2 || check3;
 }

 void Repository::updateRepoStats(const PELAttributes& pel, bool pelAdded)
 {
     auto isServiceable = Repository::isServiceableSev(pel);
     auto bmcPEL = CreatorID::openBMC == static_cast<CreatorID>(pel.creator);

     auto adjustSize = [pelAdded, &pel](auto& runningSize) {
         if (pelAdded)
         {
             runningSize += pel.sizeOnDisk;
         }
         else
         {
             runningSize = std::max(static_cast<int64_t>(runningSize) -
                                        static_cast<int64_t>(pel.sizeOnDisk),
                                    static_cast<int64_t>(0));
         }
     };

     adjustSize(_sizes.total);

     if (bmcPEL)
     {
         adjustSize(_sizes.bmc);
         if (isServiceable)
         {
             adjustSize(_sizes.bmcServiceable);
         }
         else
         {
             adjustSize(_sizes.bmcInfo);
         }
     }
     else
     {
         adjustSize(_sizes.nonBMC);
         if (isServiceable)
         {
             adjustSize(_sizes.nonBMCServiceable);
         }
         else
         {
             adjustSize(_sizes.nonBMCInfo);
         }
     }
 }

 bool Repository::sizeWarning() const
 {
     return (_sizes.total > (_maxRepoSize * warningPercentage / 100)) ||
            (_pelAttributes.size() > _maxNumPELs);
 }

 std::vector<Repository::AttributesReference>
     Repository::getAllPELAttributes(SortOrder order) const
 {
     std::vector<Repository::AttributesReference> attributes;

     std::for_each(
         _pelAttributes.begin(), _pelAttributes.end(),
         [&attributes](auto& pelEntry) { attributes.push_back(pelEntry); });

     std::sort(attributes.begin(), attributes.end(),
               [order](const auto& left, const auto& right) {
                   if (order == SortOrder::ascending)
                   {
                       return left.get().second.path < right.get().second.path;
                   }
                   return left.get().second.path > right.get().second.path;
               });

     return attributes;
 }

 std::vector<uint32_t> Repository::prune()
 {
     std::vector<uint32_t> obmcLogIDs;
     std::string msg = "Pruning PEL repository that takes up " +
                       std::to_string(_sizes.total) + " bytes and has " +
                       std::to_string(_pelAttributes.size()) + " PELs";
     log<level::INFO>(msg.c_str());

     // Set up the 5 functions to check if the PEL category
     // is still over its limits.

     // BMC informational PELs should only take up 15%
     IsOverLimitFunc overBMCInfoLimit = [this]() {
         return _sizes.bmcInfo > _maxRepoSize * 15 / 100;
     };

     // BMC non informational PELs should only take up 30%
     IsOverLimitFunc overBMCNonInfoLimit = [this]() {
         return _sizes.bmcServiceable > _maxRepoSize * 30 / 100;
     };

     // Non BMC informational PELs should only take up 15%
     IsOverLimitFunc overNonBMCInfoLimit = [this]() {
         return _sizes.nonBMCInfo > _maxRepoSize * 15 / 100;
     };

     // Non BMC non informational PELs should only take up 15%
     IsOverLimitFunc overNonBMCNonInfoLimit = [this]() {
         return _sizes.nonBMCServiceable > _maxRepoSize * 30 / 100;
     };

     // Bring the total number of PELs down to 80% of the max
     IsOverLimitFunc tooManyPELsLimit = [this]() {
         return _pelAttributes.size() > _maxNumPELs * 80 / 100;
     };

     // Set up the functions to determine which category a PEL is in.
     // TODO: Return false in these functions if a PEL caused a guard record.

     // A BMC informational PEL
     IsPELTypeFunc isBMCInfo = [](const PELAttributes& pel) {
         return (CreatorID::openBMC == static_cast<CreatorID>(pel.creator)) &&
                !Repository::isServiceableSev(pel);
     };

     // A BMC non informational PEL
     IsPELTypeFunc isBMCNonInfo = [](const PELAttributes& pel) {
         return (CreatorID::openBMC == static_cast<CreatorID>(pel.creator)) &&
                Repository::isServiceableSev(pel);
     };

     // A non BMC informational PEL
     IsPELTypeFunc isNonBMCInfo = [](const PELAttributes& pel) {
         return (CreatorID::openBMC != static_cast<CreatorID>(pel.creator)) &&
                !Repository::isServiceableSev(pel);
     };

     // A non BMC non informational PEL
     IsPELTypeFunc isNonBMCNonInfo = [](const PELAttributes& pel) {
         return (CreatorID::openBMC != static_cast<CreatorID>(pel.creator)) &&
                Repository::isServiceableSev(pel);
     };

     // When counting PELs, count every PEL
     IsPELTypeFunc isAnyPEL = [](const PELAttributes& pel) { return true; };

     // Check all 4 categories, which will result in at most 90%
     // usage (15 + 30 + 15 + 30).
     removePELs(overBMCInfoLimit, isBMCInfo, obmcLogIDs);
     removePELs(overBMCNonInfoLimit, isBMCNonInfo, obmcLogIDs);
     removePELs(overNonBMCInfoLimit, isNonBMCInfo, obmcLogIDs);
     removePELs(overNonBMCNonInfoLimit, isNonBMCNonInfo, obmcLogIDs);

     // After the above pruning check if there are still too many PELs,
     // which can happen depending on PEL sizes.
     if (_pelAttributes.size() > _maxNumPELs)
     {
         removePELs(tooManyPELsLimit, isAnyPEL, obmcLogIDs);
     }

     if (!obmcLogIDs.empty())
     {
         std::string msg = "Number of PELs removed to save space: " +
                           std::to_string(obmcLogIDs.size());
         log<level::INFO>(msg.c_str());
     }

     return obmcLogIDs;
 }

 void Repository::removePELs(IsOverLimitFunc& isOverLimit,
                             IsPELTypeFunc& isPELType,
                             std::vector<uint32_t>& removedBMCLogIDs)
 {
     if (!isOverLimit())
     {
         return;
     }

     auto attributes = getAllPELAttributes(SortOrder::ascending);

     // Make 4 passes on the PELs, stopping as soon as isOverLimit
     // returns false.
     //   Pass 1: only delete HMC acked PELs
     //   Pass 2: only delete OS acked PELs
     //   Pass 3: only delete PHYP sent PELs
     //   Pass 4: delete all PELs
     static const std::vector<std::function<bool(const PELAttributes& pel)>>
         stateChecks{[](const auto& pel) {
                         return pel.hmcState == TransmissionState::acked;
                     },

                     [](const auto& pel) {
                         return pel.hostState == TransmissionState::acked;
                     },

                     [](const auto& pel) {
                         return pel.hostState == TransmissionState::sent;
                     },

                     [](const auto& pel) { return true; }};

     for (const auto& stateCheck : stateChecks)
     {
         for (auto it = attributes.begin(); it != attributes.end();)
         {
             const auto& pel = it->get();
             if (isPELType(pel.second) && stateCheck(pel.second))
             {
                 auto removedID = pel.first.obmcID.id;
                 remove(pel.first);

                 removedBMCLogIDs.push_back(removedID);

                 attributes.erase(it);

                 if (!isOverLimit())
                 {
                     break;
                 }
             }
             else
             {
                 ++it;
             }
         }

         if (!isOverLimit())
         {
             break;
         }
     }
 }

 } // namespace pels
 } // namespace openpower
	/**
	* 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 "repository.hpp"

	#include <sys/stat.h>

	#include <fstream>
	#include <phosphor-logging/log.hpp>
	#include <xyz/openbmc_project/Common/File/error.hpp>

	namespace openpower
	{
	namespace pels
	{

	namespace fs = std::filesystem;
	using namespace phosphor::logging;
	namespace file_error = sdbusplus::xyz::openbmc_project::Common::File::Error;

	constexpr size_t warningPercentage = 95;

	/**
	* @brief Returns the amount of space the file uses on disk.
	*
	* This is different than just the regular size of the file.
	*
	* @param[in] file - The file to get the size of
	*
	* @return size_t The disk space the file uses
	*/
	size_t getFileDiskSize(const std::filesystem::path& file)
	{
	constexpr size_t statBlockSize = 512;
	struct stat statData;
	auto rc = stat(file.c_str(), &statData);
	if (rc != 0)
	{
	auto e = errno;
	std::string msg = "call to stat() failed on " + file.native() +
	" with errno " + std::to_string(e);
	log<level::ERR>(msg.c_str());
	abort();
	}

	return statData.st_blocks * statBlockSize;
	}

	Repository::Repository(const std::filesystem::path& basePath, size_t repoSize,
	size_t maxNumPELs) :
	_logPath(basePath / "logs"),
	_maxRepoSize(repoSize), _maxNumPELs(maxNumPELs)
	{
	if (!fs::exists(_logPath))
	{
	fs::create_directories(_logPath);
	}

	restore();
	}

	void Repository::restore()
	{
	for (auto& dirEntry : fs::directory_iterator(_logPath))
	{
	try
	{
	if (!fs::is_regular_file(dirEntry.path()))
	{
	continue;
	}

	std::ifstream file{dirEntry.path()};
	std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
	std::istreambuf_iterator<char>()};
	file.close();

	PEL pel{data};
	if (pel.valid())
	{
	// If the host hasn't acked it, reset the host state so
	// it will get sent up again.
	if (pel.hostTransmissionState() == TransmissionState::sent)
	{
	pel.setHostTransmissionState(TransmissionState::newPEL);
	try
	{
	write(pel, dirEntry.path());
	}
	catch (std::exception& e)
	{
	log<level::ERR>(
	"Failed to save PEL after updating host state",
	entry("PELID=0x%X", pel.id()));
	}
	}

	PELAttributes attributes{dirEntry.path(),
	getFileDiskSize(dirEntry.path()),
	pel.privateHeader().creatorID(),
	pel.userHeader().severity(),
	pel.userHeader().actionFlags(),
	pel.hostTransmissionState(),
	pel.hmcTransmissionState()};

	using pelID = LogID::Pel;
	using obmcID = LogID::Obmc;
	_pelAttributes.emplace(
	LogID(pelID(pel.id()), obmcID(pel.obmcLogID())),
	attributes);

	updateRepoStats(attributes, true);
	}
	else
	{
	log<level::ERR>(
	"Found invalid PEL file while restoring. Removing.",
	entry("FILENAME=%s", dirEntry.path().c_str()));
	fs::remove(dirEntry.path());
	}
	}
	catch (std::exception& e)
	{
	log<level::ERR>("Hit exception while restoring PEL File",
	entry("FILENAME=%s", dirEntry.path().c_str()),
	entry("ERROR=%s", e.what()));
	}
	}
	}

	std::string Repository::getPELFilename(uint32_t pelID, const BCDTime& time)
	{
	char name[50];
	sprintf(name, "%.2X%.2X%.2X%.2X%.2X%.2X%.2X%.2X_%.8X", time.yearMSB,
	time.yearLSB, time.month, time.day, time.hour, time.minutes,
	time.seconds, time.hundredths, pelID);
	return std::string{name};
	}

	void Repository::add(std::unique_ptr<PEL>& pel)
	{
	pel->setHostTransmissionState(TransmissionState::newPEL);
	pel->setHMCTransmissionState(TransmissionState::newPEL);

	auto path = _logPath / getPELFilename(pel->id(), pel->commitTime());

	write(*(pel.get()), path);

	PELAttributes attributes{path,
	getFileDiskSize(path),
	pel->privateHeader().creatorID(),
	pel->userHeader().severity(),
	pel->userHeader().actionFlags(),
	pel->hostTransmissionState(),
	pel->hmcTransmissionState()};

	using pelID = LogID::Pel;
	using obmcID = LogID::Obmc;
	_pelAttributes.emplace(LogID(pelID(pel->id()), obmcID(pel->obmcLogID())),
	attributes);

	updateRepoStats(attributes, true);

	processAddCallbacks(*pel);
	}

	void Repository::write(const PEL& pel, const fs::path& path)
	{
	std::ofstream file{path, std::ios::binary};

	if (!file.good())
	{
	// If this fails, the filesystem is probably full so it isn't like
	// we could successfully create yet another error log here.
	auto e = errno;
	fs::remove(path);
	log<level::ERR>("Unable to open PEL file for writing",
	entry("ERRNO=%d", e), entry("PATH=%s", path.c_str()));
	throw file_error::Open();
	}

	auto data = pel.data();
	file.write(reinterpret_cast<const char*>(data.data()), data.size());

	if (file.fail())
	{
	// Same note as above about not being able to create an error log
	// for this case even if we wanted.
	auto e = errno;
	file.close();
	fs::remove(path);
	log<level::ERR>("Unable to write PEL file", entry("ERRNO=%d", e),
	entry("PATH=%s", path.c_str()));
	throw file_error::Write();
	}
	}

	void Repository::remove(const LogID& id)
	{
	auto pel = findPEL(id);
	if (pel != _pelAttributes.end())
	{
	updateRepoStats(pel->second, false);

	log<level::DEBUG>("Removing PEL from repository",
	entry("PEL_ID=0x%X", pel->first.pelID.id),
	entry("OBMC_LOG_ID=%d", pel->first.obmcID.id));
	fs::remove(pel->second.path);
	_pelAttributes.erase(pel);

	processDeleteCallbacks(pel->first.pelID.id);
	}
	else
	{
	log<level::DEBUG>("Could not find PEL to remove",
	entry("PEL_ID=0x%X", id.pelID.id),
	entry("OBMC_LOG_ID=%d", id.obmcID.id));
	}
	}

	std::optional<std::vector<uint8_t>> Repository::getPELData(const LogID& id)
	{
	auto pel = findPEL(id);
	if (pel != _pelAttributes.end())
	{
	std::ifstream file{pel->second.path.c_str()};
	if (!file.good())
	{
	auto e = errno;
	log<level::ERR>("Unable to open PEL file", entry("ERRNO=%d", e),
	entry("PATH=%s", pel->second.path.c_str()));
	throw file_error::Open();
	}

	std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
	std::istreambuf_iterator<char>()};
	return data;
	}

	return std::nullopt;
	}

	std::optional<sdbusplus::message::unix_fd> Repository::getPELFD(const LogID& id)
	{
	auto pel = findPEL(id);
	if (pel != _pelAttributes.end())
	{
	FILE* fp = fopen(pel->second.path.c_str(), "rb");

	if (fp == nullptr)
	{
	auto e = errno;
	log<level::ERR>("Unable to open PEL File", entry("ERRNO=%d", e),
	entry("PATH=%s", pel->second.path.c_str()));
	throw file_error::Open();
	}

	// Must leave the file open here. It will be closed by sdbusplus
	// when it sends it back over D-Bus.

	return fileno(fp);
	}
	return std::nullopt;
	}

	void Repository::for_each(ForEachFunc func) const
	{
	for (const auto& [id, attributes] : _pelAttributes)
	{
	std::ifstream file{attributes.path};

	if (!file.good())
	{
	auto e = errno;
	log<level::ERR>("Repository::for_each: Unable to open PEL file",
	entry("ERRNO=%d", e),
	entry("PATH=%s", attributes.path.c_str()));
	continue;
	}

	std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
	std::istreambuf_iterator<char>()};
	file.close();

	PEL pel{data};

	try
	{
	if (func(pel))
	{
	break;
	}
	}
	catch (std::exception& e)
	{
	log<level::ERR>("Repository::for_each function exception",
	entry("ERROR=%s", e.what()));
	}
	}
	}

	void Repository::processAddCallbacks(const PEL& pel) const
	{
	for (auto& [name, func] : _addSubscriptions)
	{
	try
	{
	func(pel);
	}
	catch (std::exception& e)
	{
	log<level::ERR>("PEL Repository add callback exception",
	entry("NAME=%s", name.c_str()),
	entry("ERROR=%s", e.what()));
	}
	}
	}

	void Repository::processDeleteCallbacks(uint32_t id) const
	{
	for (auto& [name, func] : _deleteSubscriptions)
	{
	try
	{
	func(id);
	}
	catch (std::exception& e)
	{
	log<level::ERR>("PEL Repository delete callback exception",
	entry("NAME=%s", name.c_str()),
	entry("ERROR=%s", e.what()));
	}
	}
	}

	std::optional<std::reference_wrapper<const Repository::PELAttributes>>
	Repository::getPELAttributes(const LogID& id) const
	{
	auto pel = findPEL(id);
	if (pel != _pelAttributes.end())
	{
	return pel->second;
	}

	return std::nullopt;
	}

	void Repository::setPELHostTransState(uint32_t pelID, TransmissionState state)
	{
	LogID id{LogID::Pel{pelID}};
	auto attr = std::find_if(_pelAttributes.begin(), _pelAttributes.end(),
	[&id](const auto& a) { return a.first == id; });

	if ((attr != _pelAttributes.end()) && (attr->second.hostState != state))
	{
	PELUpdateFunc func = [state](PEL& pel) {
	pel.setHostTransmissionState(state);
	};

	try
	{
	updatePEL(attr->second.path, func);

	attr->second.hostState = state;
	}
	catch (std::exception& e)
	{
	log<level::ERR>("Unable to update PEL host transmission state",
	entry("PATH=%s", attr->second.path.c_str()),
	entry("ERROR=%s", e.what()));
	}
	}
	}

	void Repository::setPELHMCTransState(uint32_t pelID, TransmissionState state)
	{
	LogID id{LogID::Pel{pelID}};
	auto attr = std::find_if(_pelAttributes.begin(), _pelAttributes.end(),
	[&id](const auto& a) { return a.first == id; });

	if ((attr != _pelAttributes.end()) && (attr->second.hmcState != state))
	{
	PELUpdateFunc func = [state](PEL& pel) {
	pel.setHMCTransmissionState(state);
	};

	try
	{
	updatePEL(attr->second.path, func);

	attr->second.hmcState = state;
	}
	catch (std::exception& e)
	{
	log<level::ERR>("Unable to update PEL HMC transmission state",
	entry("PATH=%s", attr->second.path.c_str()),
	entry("ERROR=%s", e.what()));
	}
	}
	}

	void Repository::updatePEL(const fs::path& path, PELUpdateFunc updateFunc)
	{
	std::ifstream file{path};
	std::vector<uint8_t> data{std::istreambuf_iterator<char>(file),
	std::istreambuf_iterator<char>()};
	file.close();

	PEL pel{data};

	if (pel.valid())
	{
	updateFunc(pel);

	write(pel, path);
	}
	else
	{
	throw std::runtime_error(
	"Unable to read a valid PEL when trying to update it");
	}
	}

	bool Repository::isServiceableSev(const PELAttributes& pel)
	{
	auto sevType = static_cast<SeverityType>(pel.severity & 0xF0);
	auto sevPVEntry =
	pel_values::findByValue(pel.severity, pel_values::severityValues);
	std::string sevName = std::get<pel_values::registryNamePos>(*sevPVEntry);

	bool check1 = (sevType == SeverityType::predictive) \|\|
	(sevType == SeverityType::unrecoverable) \|\|
	(sevType == SeverityType::critical);

	bool check2 = ((sevType == SeverityType::recovered) \|\|
	(sevName == "symptom_recovered")) &&
	!pel.actionFlags.test(hiddenFlagBit);

	bool check3 = (sevName == "symptom_predictive") \|\|
	(sevName == "symptom_unrecoverable") \|\|
	(sevName == "symptom_critical");

	return check1 \|\| check2 \|\| check3;
	}

	void Repository::updateRepoStats(const PELAttributes& pel, bool pelAdded)
	{
	auto isServiceable = Repository::isServiceableSev(pel);
	auto bmcPEL = CreatorID::openBMC == static_cast<CreatorID>(pel.creator);

	auto adjustSize = [pelAdded, &pel](auto& runningSize) {
	if (pelAdded)
	{
	runningSize += pel.sizeOnDisk;
	}
	else
	{
	runningSize = std::max(static_cast<int64_t>(runningSize) -
	static_cast<int64_t>(pel.sizeOnDisk),
	static_cast<int64_t>(0));
	}
	};

	adjustSize(_sizes.total);

	if (bmcPEL)
	{
	adjustSize(_sizes.bmc);
	if (isServiceable)
	{
	adjustSize(_sizes.bmcServiceable);
	}
	else
	{
	adjustSize(_sizes.bmcInfo);
	}
	}
	else
	{
	adjustSize(_sizes.nonBMC);
	if (isServiceable)
	{
	adjustSize(_sizes.nonBMCServiceable);
	}
	else
	{
	adjustSize(_sizes.nonBMCInfo);
	}
	}
	}

	bool Repository::sizeWarning() const
	{
	return (_sizes.total > (_maxRepoSize * warningPercentage / 100)) \|\|
	(_pelAttributes.size() > _maxNumPELs);
	}

	std::vector<Repository::AttributesReference>
	Repository::getAllPELAttributes(SortOrder order) const
	{
	std::vector<Repository::AttributesReference> attributes;

	std::for_each(
	_pelAttributes.begin(), _pelAttributes.end(),
	[&attributes](auto& pelEntry) { attributes.push_back(pelEntry); });

	std::sort(attributes.begin(), attributes.end(),
	[order](const auto& left, const auto& right) {
	if (order == SortOrder::ascending)
	{
	return left.get().second.path < right.get().second.path;
	}
	return left.get().second.path > right.get().second.path;
	});

	return attributes;
	}

	std::vector<uint32_t> Repository::prune()
	{
	std::vector<uint32_t> obmcLogIDs;
	std::string msg = "Pruning PEL repository that takes up " +
	std::to_string(_sizes.total) + " bytes and has " +
	std::to_string(_pelAttributes.size()) + " PELs";
	log<level::INFO>(msg.c_str());

	// Set up the 5 functions to check if the PEL category
	// is still over its limits.

	// BMC informational PELs should only take up 15%
	IsOverLimitFunc overBMCInfoLimit = [this]() {
	return _sizes.bmcInfo > _maxRepoSize * 15 / 100;
	};

	// BMC non informational PELs should only take up 30%
	IsOverLimitFunc overBMCNonInfoLimit = [this]() {
	return _sizes.bmcServiceable > _maxRepoSize * 30 / 100;
	};

	// Non BMC informational PELs should only take up 15%
	IsOverLimitFunc overNonBMCInfoLimit = [this]() {
	return _sizes.nonBMCInfo > _maxRepoSize * 15 / 100;
	};

	// Non BMC non informational PELs should only take up 15%
	IsOverLimitFunc overNonBMCNonInfoLimit = [this]() {
	return _sizes.nonBMCServiceable > _maxRepoSize * 30 / 100;
	};

	// Bring the total number of PELs down to 80% of the max
	IsOverLimitFunc tooManyPELsLimit = [this]() {
	return _pelAttributes.size() > _maxNumPELs * 80 / 100;
	};

	// Set up the functions to determine which category a PEL is in.
	// TODO: Return false in these functions if a PEL caused a guard record.

	// A BMC informational PEL
	IsPELTypeFunc isBMCInfo = [](const PELAttributes& pel) {
	return (CreatorID::openBMC == static_cast<CreatorID>(pel.creator)) &&
	!Repository::isServiceableSev(pel);
	};

	// A BMC non informational PEL
	IsPELTypeFunc isBMCNonInfo = [](const PELAttributes& pel) {
	return (CreatorID::openBMC == static_cast<CreatorID>(pel.creator)) &&
	Repository::isServiceableSev(pel);
	};

	// A non BMC informational PEL
	IsPELTypeFunc isNonBMCInfo = [](const PELAttributes& pel) {
	return (CreatorID::openBMC != static_cast<CreatorID>(pel.creator)) &&
	!Repository::isServiceableSev(pel);
	};

	// A non BMC non informational PEL
	IsPELTypeFunc isNonBMCNonInfo = [](const PELAttributes& pel) {
	return (CreatorID::openBMC != static_cast<CreatorID>(pel.creator)) &&
	Repository::isServiceableSev(pel);
	};

	// When counting PELs, count every PEL
	IsPELTypeFunc isAnyPEL = [](const PELAttributes& pel) { return true; };

	// Check all 4 categories, which will result in at most 90%
	// usage (15 + 30 + 15 + 30).
	removePELs(overBMCInfoLimit, isBMCInfo, obmcLogIDs);
	removePELs(overBMCNonInfoLimit, isBMCNonInfo, obmcLogIDs);
	removePELs(overNonBMCInfoLimit, isNonBMCInfo, obmcLogIDs);
	removePELs(overNonBMCNonInfoLimit, isNonBMCNonInfo, obmcLogIDs);

	// After the above pruning check if there are still too many PELs,
	// which can happen depending on PEL sizes.
	if (_pelAttributes.size() > _maxNumPELs)
	{
	removePELs(tooManyPELsLimit, isAnyPEL, obmcLogIDs);
	}

	if (!obmcLogIDs.empty())
	{
	std::string msg = "Number of PELs removed to save space: " +
	std::to_string(obmcLogIDs.size());
	log<level::INFO>(msg.c_str());
	}

	return obmcLogIDs;
	}

	void Repository::removePELs(IsOverLimitFunc& isOverLimit,
	IsPELTypeFunc& isPELType,
	std::vector<uint32_t>& removedBMCLogIDs)
	{
	if (!isOverLimit())
	{
	return;
	}

	auto attributes = getAllPELAttributes(SortOrder::ascending);

	// Make 4 passes on the PELs, stopping as soon as isOverLimit
	// returns false.
	// Pass 1: only delete HMC acked PELs
	// Pass 2: only delete OS acked PELs
	// Pass 3: only delete PHYP sent PELs
	// Pass 4: delete all PELs
	static const std::vector<std::function<bool(const PELAttributes& pel)>>
	stateChecks{[](const auto& pel) {
	return pel.hmcState == TransmissionState::acked;
	},

	[](const auto& pel) {
	return pel.hostState == TransmissionState::acked;
	},

	[](const auto& pel) {
	return pel.hostState == TransmissionState::sent;
	},

	[](const auto& pel) { return true; }};

	for (const auto& stateCheck : stateChecks)
	{
	for (auto it = attributes.begin(); it != attributes.end();)
	{
	const auto& pel = it->get();
	if (isPELType(pel.second) && stateCheck(pel.second))
	{
	auto removedID = pel.first.obmcID.id;
	remove(pel.first);

	removedBMCLogIDs.push_back(removedID);

	attributes.erase(it);

	if (!isOverLimit())
	{
	break;
	}
	}
	else
	{
	++it;
	}
	}

	if (!isOverLimit())
	{
	break;
	}
	}
	}

	} // namespace pels
	} // namespace openpower