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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kQuery
#include "mongo/platform/basic.h"
#include "mongo/db/pipeline/process_interface/shardsvr_process_interface.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/exec/shard_filterer_impl.h"
#include "mongo/db/ops/write_ops_exec.h"
#include "mongo/db/ops/write_ops_gen.h"
#include "mongo/db/pipeline/document_source_internal_shard_filter.h"
#include "mongo/db/pipeline/sharded_agg_helpers.h"
#include "mongo/db/query/query_knobs_gen.h"
#include "mongo/db/s/collection_sharding_state.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/cluster_commands_helpers.h"
#include "mongo/s/grid.h"
#include "mongo/s/write_ops/cluster_write.h"
namespace mongo {
using boost::intrusive_ptr;
using std::shared_ptr;
using std::string;
using std::unique_ptr;
using write_ops::Insert;
using write_ops::Update;
using write_ops::UpdateOpEntry;
bool ShardServerProcessInterface::isSharded(OperationContext* opCtx, const NamespaceString& nss) {
Lock::DBLock dbLock(opCtx, nss.db(), MODE_IS);
Lock::CollectionLock collLock(opCtx, nss, MODE_IS);
const auto metadata = CollectionShardingState::get(opCtx, nss)->getCurrentMetadata();
return metadata->isSharded();
}
void ShardServerProcessInterface::checkRoutingInfoEpochOrThrow(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& nss,
ChunkVersion targetCollectionVersion) const {
auto catalogCache = Grid::get(expCtx->opCtx)->catalogCache();
auto const shardId = ShardingState::get(expCtx->opCtx)->shardId();
return catalogCache->checkEpochOrThrow(nss, targetCollectionVersion, shardId);
}
std::pair<std::vector<FieldPath>, bool>
ShardServerProcessInterface::collectDocumentKeyFieldsForHostedCollection(OperationContext* opCtx,
const NamespaceString& nss,
UUID uuid) const {
invariant(serverGlobalParams.clusterRole == ClusterRole::ShardServer);
const auto metadata = [opCtx, &nss]() -> ScopedCollectionMetadata {
Lock::DBLock dbLock(opCtx, nss.db(), MODE_IS);
Lock::CollectionLock collLock(opCtx, nss, MODE_IS);
return CollectionShardingState::get(opCtx, nss)->getCurrentMetadata();
}();
if (!metadata->isSharded() || !metadata->uuidMatches(uuid)) {
// An unsharded collection can still become sharded so is not final. If the uuid doesn't
// match the one stored in the ScopedCollectionMetadata, this implies that the collection
// has been dropped and recreated as sharded. We don't know what the old document key fields
// might have been in this case so we return just _id.
return {{"_id"}, false};
}
// Unpack the shard key. Collection is now sharded so the document key fields will never change,
// mark as final.
return {_shardKeyToDocumentKeyFields(metadata->getKeyPatternFields()), true};
}
Status ShardServerProcessInterface::insert(const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
std::vector<BSONObj>&& objs,
const WriteConcernOptions& wc,
boost::optional<OID> targetEpoch) {
BatchedCommandResponse response;
BatchWriteExecStats stats;
BatchedCommandRequest insertCommand(
buildInsertOp(ns, std::move(objs), expCtx->bypassDocumentValidation));
// If applicable, attach a write concern to the batched command request.
CommonMongodProcessInterface::attachWriteConcern(&insertCommand, wc);
ClusterWriter::write(expCtx->opCtx, insertCommand, &stats, &response, targetEpoch);
return response.toStatus();
}
StatusWith<MongoProcessInterface::UpdateResult> ShardServerProcessInterface::update(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
const NamespaceString& ns,
BatchedObjects&& batch,
const WriteConcernOptions& wc,
UpsertType upsert,
bool multi,
boost::optional<OID> targetEpoch) {
BatchedCommandResponse response;
BatchWriteExecStats stats;
BatchedCommandRequest updateCommand(buildUpdateOp(expCtx, ns, std::move(batch), upsert, multi));
// If applicable, attach a write concern to the batched command request.
CommonMongodProcessInterface::attachWriteConcern(&updateCommand, wc);
ClusterWriter::write(expCtx->opCtx, updateCommand, &stats, &response, targetEpoch);
if (auto status = response.toStatus(); status != Status::OK()) {
return status;
}
return {{response.getN(), response.getNModified()}};
}
std::unique_ptr<ShardFilterer> ShardServerProcessInterface::getShardFilterer(
const boost::intrusive_ptr<ExpressionContext>& expCtx) const {
auto collectionFilter =
CollectionShardingState::get(expCtx->opCtx, expCtx->ns)->getOwnershipFilter(expCtx->opCtx);
return std::make_unique<ShardFiltererImpl>(std::move(collectionFilter));
}
void ShardServerProcessInterface::renameIfOptionsAndIndexesHaveNotChanged(
OperationContext* opCtx,
const BSONObj& renameCommandObj,
const NamespaceString& destinationNs,
const BSONObj& originalCollectionOptions,
const std::list<BSONObj>& originalIndexes) {
BSONObjBuilder newCmd;
newCmd.append("internalRenameIfOptionsAndIndexesMatch", 1);
newCmd.append("from", renameCommandObj["renameCollection"].String());
newCmd.append("to", renameCommandObj["to"].String());
newCmd.append("collectionOptions", originalCollectionOptions);
if (!opCtx->getWriteConcern().usedDefault) {
newCmd.append(WriteConcernOptions::kWriteConcernField, opCtx->getWriteConcern().toBSON());
}
BSONArrayBuilder indexArrayBuilder(newCmd.subarrayStart("indexes"));
for (auto&& index : originalIndexes) {
indexArrayBuilder.append(index);
}
indexArrayBuilder.done();
auto cachedDbInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getDatabase(opCtx, destinationNs.db()));
auto newCmdObj = newCmd.obj();
auto response =
executeCommandAgainstDatabasePrimary(opCtx,
// internalRenameIfOptionsAndIndexesMatch is adminOnly.
NamespaceString::kAdminDb,
std::move(cachedDbInfo),
newCmdObj,
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
Shard::RetryPolicy::kNoRetry);
uassertStatusOKWithContext(response.swResponse,
str::stream() << "failed while running command " << newCmdObj);
auto result = response.swResponse.getValue().data;
uassertStatusOKWithContext(getStatusFromCommandResult(result),
str::stream() << "failed while running command " << newCmdObj);
uassertStatusOKWithContext(getWriteConcernStatusFromCommandResult(result),
str::stream() << "failed while running command " << newCmdObj);
}
std::list<BSONObj> ShardServerProcessInterface::getIndexSpecs(OperationContext* opCtx,
const NamespaceString& ns,
bool includeBuildUUIDs) {
auto cachedDbInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getDatabase(opCtx, ns.db()));
auto shard = uassertStatusOK(
Grid::get(opCtx)->shardRegistry()->getShard(opCtx, cachedDbInfo.primaryId()));
auto cmdObj = BSON("listIndexes" << ns.coll());
Shard::QueryResponse indexes;
try {
indexes = uassertStatusOK(
shard->runExhaustiveCursorCommand(opCtx,
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
ns.db().toString(),
appendDbVersionIfPresent(cmdObj, cachedDbInfo),
Milliseconds(-1)));
} catch (ExceptionFor<ErrorCodes::NamespaceNotFound>&) {
return std::list<BSONObj>();
}
return std::list<BSONObj>(indexes.docs.begin(), indexes.docs.end());
}
void ShardServerProcessInterface::createCollection(OperationContext* opCtx,
const std::string& dbName,
const BSONObj& cmdObj) {
auto cachedDbInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getDatabase(opCtx, dbName));
BSONObj finalCmdObj = cmdObj;
if (!opCtx->getWriteConcern().usedDefault) {
auto writeObj =
BSON(WriteConcernOptions::kWriteConcernField << opCtx->getWriteConcern().toBSON());
finalCmdObj = cmdObj.addField(writeObj.getField(WriteConcernOptions::kWriteConcernField));
}
auto response =
executeCommandAgainstDatabasePrimary(opCtx,
dbName,
std::move(cachedDbInfo),
finalCmdObj,
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
Shard::RetryPolicy::kIdempotent);
uassertStatusOKWithContext(response.swResponse,
str::stream() << "failed while running command " << finalCmdObj);
auto result = response.swResponse.getValue().data;
uassertStatusOKWithContext(getStatusFromCommandResult(result),
str::stream() << "failed while running command " << finalCmdObj);
uassertStatusOKWithContext(getWriteConcernStatusFromCommandResult(result),
str::stream()
<< "write concern failed while running command " << finalCmdObj);
}
void ShardServerProcessInterface::createIndexesOnEmptyCollection(
OperationContext* opCtx, const NamespaceString& ns, const std::vector<BSONObj>& indexSpecs) {
auto cachedDbInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getDatabase(opCtx, ns.db()));
BSONObjBuilder newCmdBuilder;
newCmdBuilder.append("createIndexes", ns.coll());
newCmdBuilder.append("indexes", indexSpecs);
if (!opCtx->getWriteConcern().usedDefault) {
newCmdBuilder.append(WriteConcernOptions::kWriteConcernField,
opCtx->getWriteConcern().toBSON());
}
auto cmdObj = newCmdBuilder.done();
auto response =
executeCommandAgainstDatabasePrimary(opCtx,
ns.db(),
std::move(cachedDbInfo),
cmdObj,
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
Shard::RetryPolicy::kIdempotent);
uassertStatusOKWithContext(response.swResponse,
str::stream() << "failed while running command " << cmdObj);
auto result = response.swResponse.getValue().data;
uassertStatusOKWithContext(getStatusFromCommandResult(result),
str::stream() << "failed while running command " << cmdObj);
uassertStatusOKWithContext(getWriteConcernStatusFromCommandResult(result),
str::stream()
<< "write concern failed while running command " << cmdObj);
}
void ShardServerProcessInterface::dropCollection(OperationContext* opCtx,
const NamespaceString& ns) {
// Build and execute the dropCollection command against the primary shard of the given
// database.
auto cachedDbInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getDatabase(opCtx, ns.db()));
BSONObjBuilder newCmdBuilder;
newCmdBuilder.append("drop", ns.coll());
if (!opCtx->getWriteConcern().usedDefault) {
newCmdBuilder.append(WriteConcernOptions::kWriteConcernField,
opCtx->getWriteConcern().toBSON());
}
auto cmdObj = newCmdBuilder.done();
auto response =
executeCommandAgainstDatabasePrimary(opCtx,
ns.db(),
std::move(cachedDbInfo),
cmdObj,
ReadPreferenceSetting(ReadPreference::PrimaryOnly),
Shard::RetryPolicy::kIdempotent);
uassertStatusOKWithContext(response.swResponse,
str::stream() << "failed while running command " << cmdObj);
auto result = response.swResponse.getValue().data;
uassertStatusOKWithContext(getStatusFromCommandResult(result),
str::stream() << "failed while running command " << cmdObj);
uassertStatusOKWithContext(getWriteConcernStatusFromCommandResult(result),
str::stream()
<< "write concern failed while running command " << cmdObj);
}
std::unique_ptr<Pipeline, PipelineDeleter>
ShardServerProcessInterface::attachCursorSourceToPipeline(
const boost::intrusive_ptr<ExpressionContext>& expCtx,
Pipeline* ownedPipeline,
bool allowTargetingShards) {
return sharded_agg_helpers::attachCursorToPipeline(expCtx, ownedPipeline, allowTargetingShards);
}
} // namespace mongo
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