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/**
* Copyright (C) 2022-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/storage/backup_block.h"
#include <boost/filesystem.hpp>
#include <set>
#include "mongo/base/string_data.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/storage/durable_catalog.h"
#include "mongo/db/storage/historical_ident_tracker.h"
#include "mongo/db/storage/storage_options.h"
namespace mongo {
namespace {
const std::set<std::string> kRequiredWTFiles = {
"WiredTiger", "WiredTiger.backup", "WiredTigerHS.wt"};
const std::set<std::string> kRequiredMDBFiles = {"_mdb_catalog.wt", "sizeStorer.wt"};
} // namespace
BackupBlock::BackupBlock(OperationContext* opCtx,
std::string filePath,
const IdentToNamespaceAndUUIDMap& identToNamespaceAndUUIDMap,
boost::optional<Timestamp> checkpointTimestamp,
std::uint64_t offset,
std::uint64_t length,
std::uint64_t fileSize)
: _filePath(filePath), _offset(offset), _length(length), _fileSize(fileSize) {
boost::filesystem::path path(filePath);
_filenameStem = path.stem().string();
_initialize(opCtx, identToNamespaceAndUUIDMap, checkpointTimestamp);
}
bool BackupBlock::isRequired() const {
// Extract the filename from the path.
boost::filesystem::path path(_filePath);
const std::string filename = path.filename().string();
// Check whether this is a required WiredTiger file.
if (kRequiredWTFiles.find(filename) != kRequiredWTFiles.end()) {
return true;
}
// Check if this is a journal file.
if (StringData(filename).startsWith("WiredTigerLog.")) {
return true;
}
// Check whether this is a required MongoDB file.
if (kRequiredMDBFiles.find(filename) != kRequiredMDBFiles.end()) {
return true;
}
// All files for the encrypted storage engine are required.
boost::filesystem::path basePath(storageGlobalParams.dbpath);
boost::filesystem::path keystoreBasePath(basePath / "key.store");
if (StringData(path.string()).startsWith(keystoreBasePath.string())) {
return true;
}
// Check if collection resides in an internal database (admin, local, or config).
if (_nss.isOnInternalDb()) {
return true;
}
// Check if collection is 'system.views'.
if (_nss.isSystemDotViews()) {
return true;
}
return false;
}
void BackupBlock::_setNamespaceString(const NamespaceString& nss) {
// Remove "system.buckets." from time-series collection namespaces since it is an internal
// detail that is not intended to be visible externally.
if (nss.isTimeseriesBucketsCollection()) {
_nss = nss.getTimeseriesViewNamespace();
return;
}
_nss = nss;
}
void BackupBlock::_initialize(OperationContext* opCtx,
const IdentToNamespaceAndUUIDMap& identToNamespaceAndUUIDMap,
boost::optional<Timestamp> checkpointTimestamp) {
if (!opCtx) {
return;
}
// Fetch the latest values for the ident.
auto it = identToNamespaceAndUUIDMap.find(_filenameStem);
if (it != identToNamespaceAndUUIDMap.end()) {
_uuid = it->second.second;
_setNamespaceString(it->second.first);
}
if (!checkpointTimestamp) {
return;
}
// Check if the ident had a different value at the checkpoint timestamp. If so, we want to use
// that instead as that will be the ident's value when restoring from the backup.
boost::optional<std::pair<NamespaceString, UUID>> historicalEntry =
HistoricalIdentTracker::get(opCtx).lookup(_filenameStem, checkpointTimestamp.get());
if (historicalEntry) {
_uuid = historicalEntry->second;
_setNamespaceString(historicalEntry->first);
}
}
} // namespace mongo
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