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/**
* Copyright (C) 2018-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/platform/basic.h"
#include "mongo/db/client.h"
#include "mongo/db/commands/server_status.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/db/storage/backup_cursor_hooks.h"
#include "mongo/db/storage/storage_engine.h"
#include "mongo/db/storage/storage_options.h"
namespace mongo {
namespace {
class StorageSSS : public ServerStatusSection {
public:
StorageSSS() : ServerStatusSection("storageEngine") {}
~StorageSSS() override = default;
bool includeByDefault() const override {
return true;
}
BSONObj generateSection(OperationContext* opCtx,
const BSONElement& configElement) const override {
auto svcCtx = opCtx->getClient()->getServiceContext();
auto engine = svcCtx->getStorageEngine();
auto oldestRequiredTimestampForCrashRecovery = engine->getOplogNeededForCrashRecovery();
auto backupCursorHooks = BackupCursorHooks::get(svcCtx);
BSONObjBuilder bob;
bob.append("name", storageGlobalParams.engine);
bob.append("supportsCommittedReads", engine->supportsReadConcernMajority());
bob.append("oldestRequiredTimestampForCrashRecovery",
oldestRequiredTimestampForCrashRecovery
? *oldestRequiredTimestampForCrashRecovery
: Timestamp());
bob.append("supportsPendingDrops", engine->supportsPendingDrops());
bob.append("dropPendingIdents", static_cast<long long>(engine->getNumDropPendingIdents()));
bob.append("supportsSnapshotReadConcern", engine->supportsReadConcernSnapshot());
bob.append("readOnly", !opCtx->getServiceContext()->userWritesAllowed());
bob.append("persistent", !engine->isEphemeral());
bob.append("backupCursorOpen", backupCursorHooks->isBackupCursorOpen());
return bob.obj();
}
} storageSSS;
} // namespace
} // namespace mongo
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