elog_watch.cpp

#include "config.h"

#include "elog_watch.hpp"

#include "dump_serialize.hpp"
#include "dump_types.hpp"
#include "xyz/openbmc_project/Dump/Create/error.hpp"

#include <cereal/cereal.hpp>
#include <phosphor-logging/elog.hpp>
#include <phosphor-logging/lg2.hpp>
#include <sdbusplus/exception.hpp>
#include <xyz/openbmc_project/Dump/Create/common.hpp>

#include <fstream>

// Register class version with Cereal
CEREAL_CLASS_VERSION(phosphor::dump::elog::Watch, CLASS_VERSION)

namespace phosphor
{
namespace dump
{
namespace elog
{

constexpr auto LOG_PATH = "/xyz/openbmc_project/logging";
using Message = std::string;
using Attributes = std::variant<Message>;
using AttributeName = std::string;
using AttributeMap = std::map<AttributeName, Attributes>;
using PropertyName = std::string;
using PropertyMap = std::map<PropertyName, AttributeMap>;

Watch::Watch(sdbusplus::bus_t& bus, Mgr& mgr) :
    mgr(mgr),
    addMatch(bus,
             sdbusplus::bus::match::rules::interfacesAdded() +
                 sdbusplus::bus::match::rules::path_namespace(OBJ_LOGGING),
             std::bind(std::mem_fn(&Watch::addCallback), this,
                       std::placeholders::_1)),
    delMatch(bus,
             sdbusplus::bus::match::rules::interfacesRemoved() +
                 sdbusplus::bus::match::rules::path_namespace(OBJ_LOGGING),
             std::bind(std::mem_fn(&Watch::delCallback), this,
                       std::placeholders::_1))
{
    std::filesystem::path file(ELOG_ID_PERSIST_PATH);
    if (std::filesystem::exists(file))
    {
        if (!deserialize(ELOG_ID_PERSIST_PATH, elogList))
        {
            lg2::error("Error occurred during error id deserialize");
        }
    }
}

void Watch::addCallback(sdbusplus::message_t& msg)
{
    using QuotaExceeded =
        sdbusplus::xyz::openbmc_project::Dump::Create::Error::QuotaExceeded;

    sdbusplus::message::object_path objectPath;
    PropertyMap propertyMap;
    try
    {
        msg.read(objectPath, propertyMap);
    }
    catch (const sdbusplus::exception_t& e)
    {
        lg2::error("Failed to parse elog add signal, errormsg: {ERROR}, "
                   "REPLY_SIG: {REPLY_SIG}",
                   "ERROR", e, "REPLY_SIG", msg.get_signature());
        return;
    }

    std::size_t found = objectPath.str.find("entry");
    if (found == std::string::npos)
    {
        // Not a new error entry skip
        return;
    }

    auto eId = getEid(objectPath);

    auto search = elogList.find(eId);
    if (search != elogList.end())
    {
        // elog exists in the list, Skip the dump
        return;
    }

    auto iter = propertyMap.find("xyz.openbmc_project.Logging.Entry");
    if (iter == propertyMap.end())
    {
        return;
    }

    auto attr = iter->second.find("Message");
    if (attr == iter->second.end())
    {
        return;
    }

    auto& data = std::get<PropertyName>(attr->second);
    if (data.empty())
    {
        // No Message skip
        return;
    }

    auto etype = findErrorType(data);
    if (!etype.has_value())
    {
        // error not supported in the configuration
        return;
    }

    auto errorType = etype.value();

    DumpCreateParams params;
    using DumpIntr = sdbusplus::common::xyz::openbmc_project::dump::Create;
    using CreateParameters =
        sdbusplus::common::xyz::openbmc_project::dump::Create::CreateParameters;
    using DumpType =
        sdbusplus::common::xyz::openbmc_project::dump::Create::DumpType;
    params[DumpIntr::convertCreateParametersToString(
        CreateParameters::FilePath)] = objectPath;
    params[DumpIntr::convertCreateParametersToString(
        CreateParameters::DumpType)] =
        DumpIntr::convertDumpTypeToString(DumpType::ErrorLog);
    params[DumpIntr::convertCreateParametersToString(
        CreateParameters::ErrorType)] = errorType;
    try
    {
        // Save the elog information. This is to avoid dump requests
        // in elog restore path.
        elogList.insert(eId);

        phosphor::dump::elog::serialize(elogList);
        mgr.Mgr::createDump(params);
    }
    catch (const QuotaExceeded& e)
    {
        // No action now
    }
    return;
}

void Watch::delCallback(sdbusplus::message_t& msg)
{
    sdbusplus::message::object_path objectPath;
    try
    {
        msg.read(objectPath);
    }
    catch (const sdbusplus::exception_t& e)
    {
        lg2::error("Failed to parse elog del signal, errormsg: {ERROR}, "
                   "REPLY_SIG: {REPLY_SIG}",
                   "ERROR", e, "REPLY_SIG", msg.get_signature());
        return;
    }

    std::size_t found = objectPath.str.find("entry");
    if (found == std::string::npos)
    {
        // Not a error entry so skip
        return;
    }

    // Get elog id
    auto eId = getEid(objectPath);

    // Delete the elog entry from the list and serialize
    auto search = elogList.find(eId);
    if (search != elogList.end())
    {
        elogList.erase(search);
        phosphor::dump::elog::serialize(elogList);
    }
}

} // namespace elog
} // namespace dump
} // namespace phosphor