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/**
* Copyright (C) 2019-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/auth/authorization_session.h"
#include "mongo/db/catalog/rename_collection.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/internal_rename_if_options_and_indexes_match_gen.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/s/collection_sharding_state.h"
#include "mongo/db/s/database_sharding_state.h"
#include "mongo/db/s/ddl_lock_manager.h"
#include "mongo/db/s/sharding_ddl_coordinator_service.h"
namespace mongo {
namespace {
MONGO_FAIL_POINT_DEFINE(blockBeforeInternalRenameIfOptionsAndIndexesMatch);
bool isCollectionSharded(OperationContext* opCtx, const NamespaceString& nss) {
AutoGetCollectionForRead lock(opCtx, nss);
return opCtx->writesAreReplicated() &&
CollectionShardingState::assertCollectionLockedAndAcquire(opCtx, nss)
->getCollectionDescription(opCtx)
.isSharded();
}
/**
* Rename a collection while checking collection option and indexes.
*/
class InternalRenameIfOptionsAndIndexesMatchCmd final
: public TypedCommand<InternalRenameIfOptionsAndIndexesMatchCmd> {
public:
using Request = InternalRenameIfOptionsAndIndexesMatch;
class Invocation final : public InvocationBase {
public:
using InvocationBase::InvocationBase;
void typedRun(OperationContext* opCtx) {
auto thisRequest = request();
const auto& fromNss = thisRequest.getFrom();
const auto& toNss = thisRequest.getTo();
const auto& originalIndexes = thisRequest.getIndexes();
const auto indexList =
std::list<BSONObj>(originalIndexes.begin(), originalIndexes.end());
const auto& collectionOptions = thisRequest.getCollectionOptions();
if (serverGlobalParams.clusterRole.has(ClusterRole::None) ||
serverGlobalParams.clusterRole.exclusivelyHasConfigRole()) {
// No need to acquire additional locks in a non-sharded environment
_internalRun(opCtx, fromNss, toNss, indexList, collectionOptions);
return;
}
// Check if the receiving shard is still the primary for the database
DatabaseShardingState::assertIsPrimaryShardForDb(opCtx, fromNss.dbName());
/**
* Acquiring the local part of the distributed locks for involved namespaces allows:
* - Serialize with sharded DDLs, ensuring no concurrent modifications of the
* collections.
* - Check safely if the target collection is sharded or not.
* Since we are not using the ShardingDDLCoordinator infrastructure we need to
* explicitly wait for all DDL coordinators to be recovered and to have re-acquired
* their DDL locks before to proceed.
* TODO SERVER-76463 remove call to 'waitForRecoveryCompletion'.
*/
ShardingDDLCoordinatorService::getService(opCtx)->waitForRecoveryCompletion(opCtx);
static constexpr StringData lockReason{"internalRenameCollection"_sd};
auto ddlLockManager = DDLLockManager::get(opCtx);
auto fromCollDDLLock = ddlLockManager->lock(
opCtx, fromNss.ns(), lockReason, DDLLockManager::kDefaultLockTimeout);
// If we are renaming a buckets collection in the $out stage, we must acquire a lock on
// the view namespace, instead of the buckets namespace. This lock avoids concurrent
// modifications, since users run operations on the view and not the buckets namespace
// and all time-series DDL operations take a lock on the view namespace.
auto toCollDDLLock = ddlLockManager->lock(opCtx,
fromNss.isOutTmpBucketsCollection()
? toNss.getTimeseriesViewNamespace().ns()
: toNss.ns(),
lockReason,
DDLLockManager::kDefaultLockTimeout);
uassert(ErrorCodes::IllegalOperation,
str::stream() << "cannot rename to sharded collection '"
<< toNss.toStringForErrorMsg() << "'",
!isCollectionSharded(opCtx, toNss));
_internalRun(opCtx, fromNss, toNss, indexList, collectionOptions);
}
private:
static void _internalRun(OperationContext* opCtx,
const NamespaceString& fromNss,
const NamespaceString& toNss,
const std::list<BSONObj>& indexList,
const BSONObj& collectionOptions) {
if (MONGO_unlikely(blockBeforeInternalRenameIfOptionsAndIndexesMatch.shouldFail())) {
blockBeforeInternalRenameIfOptionsAndIndexesMatch.pauseWhileSet();
}
RenameCollectionOptions options;
options.dropTarget = true;
options.stayTemp = false;
doLocalRenameIfOptionsAndIndexesHaveNotChanged(
opCtx, fromNss, toNss, options, std::move(indexList), collectionOptions);
}
NamespaceString ns() const override {
return request().getFrom();
}
bool supportsWriteConcern() const override {
return true;
}
void doCheckAuthorization(OperationContext* opCtx) const override {
auto thisRequest = request();
auto from = thisRequest.getFrom();
auto to = thisRequest.getTo();
uassert(ErrorCodes::Unauthorized,
str::stream() << "Unauthorized to rename " << from.toStringForErrorMsg(),
AuthorizationSession::get(opCtx->getClient())
->isAuthorizedForActionsOnResource(ResourcePattern::forExactNamespace(from),
ActionType::renameCollection));
uassert(ErrorCodes::Unauthorized,
str::stream() << "Unauthorized to drop " << to.toStringForErrorMsg(),
AuthorizationSession::get(opCtx->getClient())
->isAuthorizedForActionsOnResource(ResourcePattern::forExactNamespace(to),
ActionType::dropCollection));
uassert(ErrorCodes::Unauthorized,
str::stream() << "Unauthorized to insert into " << to.toStringForErrorMsg(),
AuthorizationSession::get(opCtx->getClient())
->isAuthorizedForActionsOnResource(ResourcePattern::forExactNamespace(to),
ActionType::insert));
}
};
bool skipApiVersionCheck() const override {
// Internal command (server to server).
return true;
}
std::string help() const override {
return "Internal command to rename and check collection options";
}
bool adminOnly() const override {
return true;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
} internalRenameIfOptionsAndIndexesMatchCmd;
} // namespace
} // namespace mongo
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