blob: d587ec4251d8832b6c3aaa80019a1cac19237188 [file] [log] [blame]
#include <fstream>
#include <iostream>
#include <chrono>
#include <cstdio>
#include <set>
#include <string>
#include <vector>
#include <sdbusplus/vtable.hpp>
#include <systemd/sd-bus.h>
#include <systemd/sd-journal.h>
#include "config.h"
#include "elog_entry.hpp"
#include <phosphor-logging/log.hpp>
#include "log_manager.hpp"
#include "elog_meta.hpp"
#include "elog_serialize.hpp"
using namespace phosphor::logging;
extern const std::map<metadata::Metadata,
std::function<metadata::associations::Type>> meta;
namespace phosphor
{
namespace logging
{
void Manager::commit(uint64_t transactionId, std::string errMsg)
{
constexpr const auto transactionIdVar = "TRANSACTION_ID";
// Length of 'TRANSACTION_ID' string.
constexpr const auto transactionIdVarSize = strlen(transactionIdVar);
// Length of 'TRANSACTION_ID=' string.
constexpr const auto transactionIdVarOffset = transactionIdVarSize + 1;
sd_journal *j = nullptr;
int rc = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
if (rc < 0)
{
logging::log<logging::level::ERR>("Failed to open journal",
logging::entry("DESCRIPTION=%s", strerror(-rc)));
return;
}
std::string transactionIdStr = std::to_string(transactionId);
std::set<std::string> metalist;
auto metamap = g_errMetaMap.find(errMsg);
if (metamap != g_errMetaMap.end())
{
metalist.insert(metamap->second.begin(), metamap->second.end());
}
std::vector<std::string> additionalData;
// Read the journal from the end to get the most recent entry first.
// The result from the sd_journal_get_data() is of the form VARIABLE=value.
SD_JOURNAL_FOREACH_BACKWARDS(j)
{
const char *data = nullptr;
size_t length = 0;
// Look for the transaction id metadata variable
rc = sd_journal_get_data(j, transactionIdVar, (const void **)&data,
&length);
if (rc < 0)
{
// This journal entry does not have the TRANSACTION_ID
// metadata variable.
continue;
}
// journald does not guarantee that sd_journal_get_data() returns NULL
// terminated strings, so need to specify the size to use to compare,
// use the returned length instead of anything that relies on NULL
// terminators like strlen().
// The data variable is in the form of 'TRANSACTION_ID=1234'. Remove
// the TRANSACTION_ID characters plus the (=) sign to do the comparison.
// 'data + transactionIdVarOffset' will be in the form of '1234'.
// 'length - transactionIdVarOffset' will be the length of '1234'.
if ((length <= (transactionIdVarOffset)) ||
(transactionIdStr.compare(0,
transactionIdStr.size(),
data + transactionIdVarOffset,
length - transactionIdVarOffset) != 0))
{
// The value of the TRANSACTION_ID metadata is not the requested
// transaction id number.
continue;
}
// Search for all metadata variables in the current journal entry.
for (auto i = metalist.cbegin(); i != metalist.cend();)
{
rc = sd_journal_get_data(j, (*i).c_str(),
(const void **)&data, &length);
if (rc < 0)
{
// Metadata variable not found, check next metadata variable.
i++;
continue;
}
// Metadata variable found, save it and remove it from the set.
additionalData.emplace_back(data, length);
i = metalist.erase(i);
}
if (metalist.empty())
{
// All metadata variables found, break out of journal loop.
break;
}
}
if (!metalist.empty())
{
// Not all the metadata variables were found in the journal.
for (auto& metaVarStr : metalist)
{
logging::log<logging::level::INFO>("Failed to find metadata",
logging::entry("META_FIELD=%s", metaVarStr.c_str()));
}
}
sd_journal_close(j);
// Create error Entry dbus object
entryId++;
auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::system_clock::now().time_since_epoch()).count();
auto objPath = std::string(OBJ_ENTRY) + '/' +
std::to_string(entryId);
AssociationList objects {};
processMetadata(errMsg, additionalData, objects);
level reqLevel = level::ERR; // Default to ERR
auto levelmap = g_errLevelMap.find(errMsg);
if (levelmap != g_errLevelMap.end())
{
reqLevel = levelmap->second;
}
auto e = std::make_unique<Entry>(
busLog,
objPath,
entryId,
ms, // Milliseconds since 1970
static_cast<Entry::Level>(reqLevel),
std::move(errMsg),
std::move(additionalData),
std::move(objects),
*this);
serialize(*e);
entries.insert(std::make_pair(entryId, std::move(e)));
}
void Manager::processMetadata(const std::string& errorName,
const std::vector<std::string>& additionalData,
AssociationList& objects) const
{
// additionalData is a list of "metadata=value"
constexpr auto separator = '=';
for(const auto& entry: additionalData)
{
auto found = entry.find(separator);
if(std::string::npos != found)
{
auto metadata = entry.substr(0, found);
auto iter = meta.find(metadata);
if(meta.end() != iter)
{
(iter->second)(metadata, additionalData, objects);
}
}
}
}
void Manager::erase(uint32_t entryId)
{
auto entry = entries.find(entryId);
auto id = entry->second->id();
if(entries.end() != entry)
{
// Delete the persistent representation of this error.
fs::path errorPath(ERRLOG_PERSIST_PATH);
errorPath /= std::to_string(id);
fs::remove(errorPath);
entries.erase(entry);
}
}
void Manager::restore()
{
std::vector<uint32_t> errorIds;
fs::path dir(ERRLOG_PERSIST_PATH);
if (!fs::exists(dir) || fs::is_empty(dir))
{
return;
}
for(auto& file: fs::directory_iterator(dir))
{
auto id = file.path().filename().c_str();
auto idNum = std::stol(id);
auto e = std::make_unique<Entry>(
busLog,
std::string(OBJ_ENTRY) + '/' + id,
idNum,
*this);
if (deserialize(file.path(), *e))
{
e->emit_object_added();
entries.insert(std::make_pair(idNum, std::move(e)));
errorIds.push_back(idNum);
}
}
entryId = *(std::max_element(errorIds.begin(), errorIds.end()));
}
} // namespace logging
} // namepsace phosphor