diff options
Diffstat (limited to 'src/mongo/db/s/shardsvr_set_allow_migrations_command.cpp')
| -rw-r--r-- | src/mongo/db/s/shardsvr_set_allow_migrations_command.cpp | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/mongo/db/s/shardsvr_set_allow_migrations_command.cpp b/src/mongo/db/s/shardsvr_set_allow_migrations_command.cpp new file mode 100644 index 00000000000..244653e2783 --- /dev/null +++ b/src/mongo/db/s/shardsvr_set_allow_migrations_command.cpp @@ -0,0 +1,142 @@ +/** + * Copyright (C) 2021-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. + */ + +#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kSharding + +#include "mongo/db/auth/authorization_session.h" +#include "mongo/db/commands.h" +#include "mongo/db/s/sharding_state.h" +#include "mongo/s/grid.h" +#include "mongo/s/request_types/set_allow_migrations_gen.h" +#include "mongo/s/write_ops/batched_command_request.h" +#include "mongo/s/write_ops/batched_command_response.h" + +namespace mongo { +namespace { + +class ShardsvrSetAllowMigrationsCommand final + : public TypedCommand<ShardsvrSetAllowMigrationsCommand> { +public: + using Request = ShardsvrSetAllowMigrations; + + std::string help() const override { + return "Internal command. Do not call directly. Enable/disable migrations in a collection."; + } + + bool adminOnly() const override { + return false; + } + + AllowedOnSecondary secondaryAllowed(ServiceContext*) const override { + return AllowedOnSecondary::kNever; + } + + class Invocation final : public InvocationBase { + public: + using InvocationBase::InvocationBase; + + bool isCollectionSharded(OperationContext* opCtx, const NamespaceString& nss) { + try { + uassertStatusOK(Grid::get(opCtx)->catalogClient()->getCollection(opCtx, nss)); + return true; + } catch (ExceptionFor<ErrorCodes::NamespaceNotFound>&) { + // The collection is unsharded or doesn't exist + return false; + } + } + + void typedRun(OperationContext* opCtx) { + uassertStatusOK(ShardingState::get(opCtx)->canAcceptShardedCommands()); + + opCtx->setAlwaysInterruptAtStepDownOrUp(); + + uassert(ErrorCodes::InvalidOptions, + str::stream() << Request::kCommandName + << " must be called with majority writeConcern, got " + << request().toBSON(BSONObj()), + opCtx->getWriteConcern().wMode == WriteConcernOptions::kMajority); + + const auto& nss = ns(); + + uassert(ErrorCodes::NamespaceNotSharded, + "Collection must be sharded so migrations can be blocked", + isCollectionSharded(opCtx, nss)); + + const auto configShard = Grid::get(opCtx)->shardRegistry()->getConfigShard(); + + BatchedCommandRequest updateRequest([&]() { + write_ops::Update updateOp(CollectionType::ConfigNS); + updateOp.setUpdates({[&] { + write_ops::UpdateOpEntry entry; + entry.setQ(BSON(CollectionType::fullNs << nss.ns())); + if (request().getAllowMigrations()) { + entry.setU(write_ops::UpdateModification(BSON( + "$unset" << BSON(CollectionType::permitMigrations.name() << true)))); + } else { + entry.setU(write_ops::UpdateModification(BSON( + "$set" << BSON(CollectionType::permitMigrations.name() << false)))); + } + entry.setMulti(false); + return entry; + }()}); + return updateOp; + }()); + + updateRequest.setWriteConcern(ShardingCatalogClient::kMajorityWriteConcern.toBSON()); + + auto response = configShard->runBatchWriteCommand(opCtx, + Shard::kDefaultConfigCommandTimeout, + updateRequest, + Shard::RetryPolicy::kIdempotent); + + uassertStatusOK(response.toStatus()); + } + + private: + NamespaceString ns() const override { + return request().getNamespace(); + } + + bool supportsWriteConcern() const override { + return true; + } + + void doCheckAuthorization(OperationContext* opCtx) const override { + uassert(ErrorCodes::Unauthorized, + "Unauthorized", + AuthorizationSession::get(opCtx->getClient()) + ->isAuthorizedForActionsOnResource(ResourcePattern::forClusterResource(), + ActionType::internal)); + } + }; + +} shardsvrSetAllowMigrationsCommand; + +} // namespace +} // namespace mongo |