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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.
*/
#pragma once
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/client.h"
#include "mongo/db/commands/list_databases_for_all_tenants_gen.h"
#include "mongo/db/commands/list_databases_gen.h"
#include "mongo/db/concurrency/exception_util.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/matcher/expression.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/db/storage/storage_engine.h"
#include "mongo/util/database_name_util.h"
namespace mongo {
namespace list_databases {
constexpr auto kName = "name"_sd;
// Initialize ListDatabasesForAllTenantsReplyItem reply item by setting the tenantId
void inline initializeItemWithTenantId(ListDatabasesForAllTenantsReplyItem& item,
const DatabaseName& dbName) {
item.setTenantId(dbName.tenantId());
}
// Do nothing if provided ListDatabasesReplyItem to satisy the compiler
void inline initializeItemWithTenantId(ListDatabasesReplyItem& item, const DatabaseName& dbName) {
/* No-op */
}
template <class CommandType>
std::unique_ptr<MatchExpression> getFilter(CommandType cmd,
OperationContext* opCtx,
NamespaceString ns) {
if (auto filterObj = cmd.getFilter()) {
// The collator is null because database metadata objects are compared using simple
// binary comparison.
auto expCtx = make_intrusive<ExpressionContext>(
opCtx, std::unique_ptr<CollatorInterface>(nullptr), ns);
auto matcher =
uassertStatusOK(MatchExpressionParser::parse(filterObj.get(), std::move(expCtx)));
return matcher;
}
return std::unique_ptr<MatchExpression>{};
}
template <typename ReplyItemType>
int64_t setReplyItems(OperationContext* opCtx,
const std::vector<DatabaseName>& dbNames,
std::vector<ReplyItemType>& items,
StorageEngine* storageEngine,
bool nameOnly,
const std::unique_ptr<MatchExpression>& filter,
bool setTenantId,
bool authorizedDatabases) {
auto* as = AuthorizationSession::get(opCtx->getClient());
const bool filterNameOnly = filter &&
filter->getCategory() == MatchExpression::MatchCategory::kLeaf && filter->path() == kName;
int64_t totalSize = 0;
for (const auto& dbName : dbNames) {
if (authorizedDatabases &&
!as->isAuthorizedForAnyActionOnAnyResourceInDB(DatabaseNameUtil::serialize(dbName))) {
// We don't have listDatabases on the cluster or find on this database.
continue;
}
// If setTenantId is true, always return the dbName without the tenantId
ReplyItemType item(setTenantId ? dbName.db().toString()
: DatabaseNameUtil::serialize(dbName));
if (setTenantId) {
initializeItemWithTenantId(item, dbName);
}
int64_t size = 0;
if (!nameOnly) {
// Filtering on name only should not require taking locks on filtered-out names.
if (filterNameOnly && !filter->matchesBSON(item.toBSON())) {
continue;
}
AutoGetDbForReadMaybeLockFree lockFreeReadBlock(opCtx, dbName);
// The database could have been dropped since we called 'listDatabases()' originally.
if (!DatabaseHolder::get(opCtx)->dbExists(opCtx, dbName)) {
continue;
}
writeConflictRetry(opCtx, "sizeOnDisk", toStringForLogging(dbName), [&] {
size = storageEngine->sizeOnDiskForDb(opCtx, dbName);
});
item.setSizeOnDisk(size);
item.setEmpty(
CollectionCatalog::get(opCtx)->getAllCollectionUUIDsFromDb(dbName).empty());
}
if (!filter || filter->matchesBSON(item.toBSON())) {
totalSize += size;
items.push_back(std::move(item));
}
}
return totalSize;
}
} // namespace list_databases
} // namespace mongo
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