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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "indexwriteutilities.h"
#include "indexdisklayout.h"
#include "indexreadutilities.h"
#include <vespa/searchlib/common/serialnumfileheadercontext.h>
#include <vespa/searchlib/index/schemautil.h>
#include <vespa/fastlib/io/bufferedfile.h>
#include <vespa/vespalib/io/fileutil.h>
#include <vespa/vespalib/util/exceptions.h>
#include <filesystem>
#include <sstream>
#include <system_error>
#include <unistd.h>
#include <vespa/log/log.h>
LOG_SETUP(".searchcorespi.index.indexwriteutilities");
using search::FixedSourceSelector;
using search::TuneFileAttributes;
using search::common::FileHeaderContext;
using search::common::SerialNumFileHeaderContext;
using search::index::Schema;
using search::index::SchemaUtil;
using search::SerialNum;
using vespalib::IllegalStateException;
using vespalib::FileHeader;
namespace searchcorespi::index {
namespace {
SerialNum noSerialNumHigh = std::numeric_limits<SerialNum>::max();
}
void
IndexWriteUtilities::writeSerialNum(SerialNum serialNum,
const vespalib::string &dir,
const FileHeaderContext &fileHeaderContext)
{
const vespalib::string fileName =
IndexDiskLayout::getSerialNumFileName(dir);
const vespalib::string tmpFileName = fileName + ".tmp";
SerialNumFileHeaderContext snFileHeaderContext(fileHeaderContext, serialNum);
Fast_BufferedFile file;
file.WriteOpen(tmpFileName.c_str());
FileHeader fileHeader;
snFileHeaderContext.addTags(fileHeader, fileName);
fileHeader.putTag(FileHeader::Tag(IndexDiskLayout::SerialNumTag, serialNum));
bool ok = (fileHeader.writeFile(file) >= fileHeader.getSize());
if ( ! ok) {
LOG(error, "Unable to write file header '%s'", tmpFileName.c_str());
}
if ( ! file.Sync()) {
ok = false;
LOG(error, "Unable to fsync '%s'", tmpFileName.c_str());
}
if ( ! file.Close()) {
ok = false;
LOG(error, "Unable to close '%s'", tmpFileName.c_str());
}
vespalib::File::sync(dir);
if (ok) {
FastOS_File renameFile(tmpFileName.c_str());
ok &= renameFile.Rename(fileName.c_str());
}
if (!ok) {
std::ostringstream msg;
msg << "Unable to write serial number to '" << dir << "'.";
throw IllegalStateException(msg.str());
}
vespalib::File::sync(dir);
}
bool
IndexWriteUtilities::copySerialNumFile(const vespalib::string &sourceDir,
const vespalib::string &destDir)
{
vespalib::string source = IndexDiskLayout::getSerialNumFileName(sourceDir);
vespalib::string dest = IndexDiskLayout::getSerialNumFileName(destDir);
vespalib::string tmpDest = dest + ".tmp";
std::error_code ec;
std::filesystem::copy_file(std::filesystem::path(source), std::filesystem::path(tmpDest), ec);
if (ec) {
LOG(error, "Unable to copy file '%s'", source.c_str());
return false;
}
FastOS_File file(tmpDest.c_str());
if (!file.OpenReadWrite()) {
LOG(error, "Unable to open '%s' for fsync", tmpDest.c_str());
return false;
}
if (!file.Sync()) {
LOG(error, "Unable to fsync '%s'", tmpDest.c_str());
return false;
}
if (!file.Close()) {
LOG(error, "Unable to close '%s'", tmpDest.c_str());
return false;
}
vespalib::File::sync(destDir);
if (!file.Rename(dest.c_str())) {
LOG(error, "Unable to rename file '%s' to '%s'", tmpDest.c_str(), dest.c_str());
return false;
}
vespalib::File::sync(destDir);
return true;
}
void
IndexWriteUtilities::writeSourceSelector(FixedSourceSelector::SaveInfo &
saveInfo,
uint32_t sourceId,
const TuneFileAttributes &
tuneFileAttributes,
const FileHeaderContext &
fileHeaderContext,
SerialNum serialNum)
{
SerialNumFileHeaderContext snFileHeaderContext(fileHeaderContext,
serialNum);
if (!saveInfo.save(tuneFileAttributes, snFileHeaderContext)) {
std::ostringstream msg;
msg << "Flush of sourceselector failed. Source id = " << sourceId;
throw IllegalStateException(msg.str());
}
}
void
IndexWriteUtilities::updateDiskIndexSchema(const vespalib::string &indexDir,
const Schema &schema,
SerialNum serialNum)
{
vespalib::string schemaName = IndexDiskLayout::getSchemaFileName(indexDir);
Schema oldSchema;
if (!oldSchema.loadFromFile(schemaName)) {
LOG(error, "Could not open schema '%s'",
schemaName.c_str());
return;
}
if (!SchemaUtil::validateSchema(oldSchema)) {
LOG(error, "Could not validate schema loaded from '%s'",
schemaName.c_str());
return;
}
Schema::UP newSchema = Schema::intersect(oldSchema, schema);
if (*newSchema == oldSchema) {
return;
}
if (serialNum != noSerialNumHigh) {
SerialNum oldSerial = IndexReadUtilities::readSerialNum(indexDir);
if (oldSerial >= serialNum) {
return;
}
}
vespalib::string schemaTmpName = schemaName + ".tmp";
vespalib::string schemaOrigName = schemaName + ".orig";
vespalib::unlink(schemaTmpName);
if (!newSchema->saveToFile(schemaTmpName)) {
LOG(error, "Could not save schema to '%s'",
schemaTmpName.c_str());
}
// XXX: FastOS layer violation
FastOS_StatInfo statInfo;
bool statres;
statres = FastOS_File::Stat(schemaOrigName.c_str(), &statInfo);
if (!statres) {
if (statInfo._error != FastOS_StatInfo::FileNotFound) {
LOG(error, "Failed to stat orig schema '%s': %s",
schemaOrigName.c_str(),
FastOS_File::getLastErrorString().c_str());
}
int linkres = ::link(schemaName.c_str(), schemaOrigName.c_str());
if (linkres != 0) {
LOG(error, "Could not link '%s' to '%s': %s",
schemaOrigName.c_str(),
schemaName.c_str(),
FastOS_File::getLastErrorString().c_str());
}
vespalib::File::sync(indexDir);
}
// XXX: FastOS layer violation
int renameres = ::rename(schemaTmpName.c_str(), schemaName.c_str());
if (renameres != 0) {
int error = errno;
std::string errString = FastOS_File::getErrorString(error);
LOG(error, "Could not rename '%s' to '%s': %s",
schemaTmpName.c_str(),
schemaName.c_str(),
errString.c_str());
}
vespalib::File::sync(indexDir);
}
}
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