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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::kReplication
#include "mongo/platform/basic.h"
#include "mongo/db/repl/storage_interface_impl.h"
#include <algorithm>
#include <boost/optional.hpp>
#include <utility>
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/catalog/coll_mod.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_catalog.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog/document_validation.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/client.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/curop.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/exec/delete.h"
#include "mongo/db/exec/update_stage.h"
#include "mongo/db/exec/working_set_common.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/keypattern.h"
#include "mongo/db/logical_clock.h"
#include "mongo/db/matcher/extensions_callback_real.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/ops/delete_request.h"
#include "mongo/db/ops/parsed_update.h"
#include "mongo/db/ops/update_request.h"
#include "mongo/db/query/get_executor.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/repl/collection_bulk_loader_impl.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/repl/rollback_gen.h"
#include "mongo/db/service_context.h"
#include "mongo/db/storage/durable_catalog.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/log.h"
#include "mongo/util/str.h"
namespace mongo {
namespace repl {
const char StorageInterfaceImpl::kDefaultRollbackIdNamespace[] = "local.system.rollback.id";
const char StorageInterfaceImpl::kRollbackIdFieldName[] = "rollbackId";
const char StorageInterfaceImpl::kRollbackIdDocumentId[] = "rollbackId";
namespace {
using UniqueLock = stdx::unique_lock<stdx::mutex>;
const auto kIdIndexName = "_id_"_sd;
LockMode fixLockModeForSystemDotViewsChanges(const NamespaceString& nss, LockMode mode) {
return nss.isSystemDotViews() ? MODE_X : mode;
}
} // namespace
StorageInterfaceImpl::StorageInterfaceImpl()
: _rollbackIdNss(StorageInterfaceImpl::kDefaultRollbackIdNamespace) {}
StatusWith<int> StorageInterfaceImpl::getRollbackID(OperationContext* opCtx) {
BSONObjBuilder bob;
bob.append("_id", kRollbackIdDocumentId);
auto id = bob.obj();
try {
auto rbidDoc = findById(opCtx, _rollbackIdNss, id["_id"]);
if (!rbidDoc.isOK()) {
return rbidDoc.getStatus();
}
auto rbid = RollbackID::parse(IDLParserErrorContext("RollbackID"), rbidDoc.getValue());
invariant(rbid.get_id() == kRollbackIdDocumentId);
return rbid.getRollbackId();
} catch (...) {
return exceptionToStatus();
}
MONGO_UNREACHABLE;
}
StatusWith<int> StorageInterfaceImpl::initializeRollbackID(OperationContext* opCtx) {
UninterruptibleLockGuard noInterrupt(opCtx->lockState());
auto status = createCollection(opCtx, _rollbackIdNss, CollectionOptions());
if (!status.isOK()) {
return status;
}
RollbackID rbid;
int initRBID = 1;
rbid.set_id(kRollbackIdDocumentId);
rbid.setRollbackId(initRBID);
BSONObjBuilder bob;
rbid.serialize(&bob);
Timestamp noTimestamp; // This write is not replicated.
status = insertDocument(opCtx,
_rollbackIdNss,
TimestampedBSONObj{bob.done(), noTimestamp},
OpTime::kUninitializedTerm);
if (status.isOK()) {
return initRBID;
} else {
return status;
}
}
StatusWith<int> StorageInterfaceImpl::incrementRollbackID(OperationContext* opCtx) {
// This is safe because this is only called during rollback, and you can not have two
// rollbacks at once.
auto rbidSW = getRollbackID(opCtx);
if (!rbidSW.isOK()) {
return rbidSW;
}
// If we would go over the integer limit, reset the Rollback ID to 1.
BSONObjBuilder updateBob;
int newRBID = -1;
if (rbidSW.getValue() == std::numeric_limits<int>::max()) {
newRBID = 1;
BSONObjBuilder setBob(updateBob.subobjStart("$set"));
setBob.append(kRollbackIdFieldName, newRBID);
} else {
BSONObjBuilder incBob(updateBob.subobjStart("$inc"));
incBob.append(kRollbackIdFieldName, 1);
newRBID = rbidSW.getValue() + 1;
}
// Since the Rollback ID is in a singleton collection, we can fix the _id field.
BSONObjBuilder bob;
bob.append("_id", kRollbackIdDocumentId);
auto id = bob.obj();
Status status = upsertById(opCtx, _rollbackIdNss, id["_id"], updateBob.obj());
// We wait until durable so that we are sure the Rollback ID is updated before rollback ends.
if (status.isOK()) {
opCtx->recoveryUnit()->waitUntilDurable();
return newRBID;
}
return status;
}
StatusWith<std::unique_ptr<CollectionBulkLoader>>
StorageInterfaceImpl::createCollectionForBulkLoading(
const NamespaceString& nss,
const CollectionOptions& options,
const BSONObj idIndexSpec,
const std::vector<BSONObj>& secondaryIndexSpecs) {
LOG(2) << "StorageInterfaceImpl::createCollectionForBulkLoading called for ns: " << nss.ns();
class StashClient {
public:
StashClient() {
if (Client::getCurrent()) {
_stashedClient = Client::releaseCurrent();
}
}
~StashClient() {
if (Client::getCurrent()) {
Client::releaseCurrent();
}
if (_stashedClient) {
Client::setCurrent(std::move(_stashedClient));
}
}
private:
ServiceContext::UniqueClient _stashedClient;
} stash;
Client::setCurrent(
getGlobalServiceContext()->makeClient(str::stream() << nss.ns() << " loader"));
auto opCtx = cc().makeOperationContext();
documentValidationDisabled(opCtx.get()) = true;
std::unique_ptr<AutoGetCollection> autoColl;
// Retry if WCE.
Status status = writeConflictRetry(opCtx.get(), "beginCollectionClone", nss.ns(), [&] {
UnreplicatedWritesBlock uwb(opCtx.get());
// Get locks and create the collection.
AutoGetOrCreateDb db(opCtx.get(), nss.db(), MODE_X);
AutoGetCollection coll(opCtx.get(), nss, fixLockModeForSystemDotViewsChanges(nss, MODE_IX));
if (coll.getCollection()) {
return Status(ErrorCodes::NamespaceExists,
str::stream() << "Collection " << nss.ns() << " already exists.");
}
{
// Create the collection.
WriteUnitOfWork wunit(opCtx.get());
fassert(40332, db.getDb()->createCollection(opCtx.get(), nss, options, false));
wunit.commit();
}
autoColl = std::make_unique<AutoGetCollection>(
opCtx.get(), nss, fixLockModeForSystemDotViewsChanges(nss, MODE_IX));
// Build empty capped indexes. Capped indexes cannot be built by the MultiIndexBlock
// because the cap might delete documents off the back while we are inserting them into
// the front.
if (options.capped) {
WriteUnitOfWork wunit(opCtx.get());
if (!idIndexSpec.isEmpty()) {
auto status =
autoColl->getCollection()->getIndexCatalog()->createIndexOnEmptyCollection(
opCtx.get(), idIndexSpec);
if (!status.getStatus().isOK()) {
return status.getStatus();
}
}
for (auto&& spec : secondaryIndexSpecs) {
auto status =
autoColl->getCollection()->getIndexCatalog()->createIndexOnEmptyCollection(
opCtx.get(), spec);
if (!status.getStatus().isOK()) {
return status.getStatus();
}
}
wunit.commit();
}
return Status::OK();
});
if (!status.isOK()) {
return status;
}
// Move locks into loader, so it now controls their lifetime.
auto loader =
std::make_unique<CollectionBulkLoaderImpl>(Client::releaseCurrent(),
std::move(opCtx),
std::move(autoColl),
options.capped ? BSONObj() : idIndexSpec);
status = loader->init(options.capped ? std::vector<BSONObj>() : secondaryIndexSpecs);
if (!status.isOK()) {
return status;
}
return {std::move(loader)};
}
Status StorageInterfaceImpl::insertDocument(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
const TimestampedBSONObj& doc,
long long term) {
return insertDocuments(opCtx, nsOrUUID, {InsertStatement(doc.obj, doc.timestamp, term)});
}
namespace {
/**
* Returns Collection* from database RAII object.
* Returns NamespaceNotFound if the database or collection does not exist.
*/
template <typename AutoGetCollectionType>
StatusWith<Collection*> getCollection(const AutoGetCollectionType& autoGetCollection,
const NamespaceStringOrUUID& nsOrUUID,
const std::string& message) {
if (!autoGetCollection.getDb()) {
StringData dbName = nsOrUUID.nss() ? nsOrUUID.nss()->db() : nsOrUUID.dbname();
return {ErrorCodes::NamespaceNotFound,
str::stream() << "Database [" << dbName << "] not found. " << message};
}
auto collection = autoGetCollection.getCollection();
if (!collection) {
return {ErrorCodes::NamespaceNotFound,
str::stream() << "Collection [" << nsOrUUID.toString() << "] not found. "
<< message};
}
return collection;
}
Status insertDocumentsSingleBatch(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
std::vector<InsertStatement>::const_iterator begin,
std::vector<InsertStatement>::const_iterator end) {
AutoGetCollection autoColl(opCtx, nsOrUUID, MODE_IX);
auto collectionResult =
getCollection(autoColl, nsOrUUID, "The collection must exist before inserting documents.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
WriteUnitOfWork wunit(opCtx);
OpDebug* const nullOpDebug = nullptr;
auto status = collection->insertDocuments(opCtx, begin, end, nullOpDebug, false);
if (!status.isOK()) {
return status;
}
wunit.commit();
return Status::OK();
}
} // namespace
Status StorageInterfaceImpl::insertDocuments(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
const std::vector<InsertStatement>& docs) {
if (docs.size() > 1U) {
try {
if (insertDocumentsSingleBatch(opCtx, nsOrUUID, docs.cbegin(), docs.cend()).isOK()) {
return Status::OK();
}
} catch (...) {
// Ignore this failure and behave as-if we never tried to do the combined batch insert.
// The loop below will handle reporting any non-transient errors.
}
}
// Try to insert the batch one-at-a-time because the batch failed all-at-once inserting.
for (auto it = docs.cbegin(); it != docs.cend(); ++it) {
auto status = writeConflictRetry(
opCtx, "StorageInterfaceImpl::insertDocuments", nsOrUUID.toString(), [&] {
auto status = insertDocumentsSingleBatch(opCtx, nsOrUUID, it, it + 1);
if (!status.isOK()) {
return status;
}
return Status::OK();
});
if (!status.isOK()) {
return status;
}
}
return Status::OK();
}
Status StorageInterfaceImpl::dropReplicatedDatabases(OperationContext* opCtx) {
Lock::GlobalWrite globalWriteLock(opCtx);
std::vector<std::string> dbNames =
opCtx->getServiceContext()->getStorageEngine()->listDatabases();
invariant(!dbNames.empty());
log() << "dropReplicatedDatabases - dropping " << dbNames.size() << " databases";
ReplicationCoordinator::get(opCtx)->dropAllSnapshots();
auto databaseHolder = DatabaseHolder::get(opCtx);
auto hasLocalDatabase = false;
for (const auto& dbName : dbNames) {
if (dbName == "local") {
hasLocalDatabase = true;
continue;
}
writeConflictRetry(opCtx, "dropReplicatedDatabases", dbName, [&] {
if (auto db = databaseHolder->getDb(opCtx, dbName)) {
databaseHolder->dropDb(opCtx, db);
} else {
// This is needed since dropDatabase can't be rolled back.
// This is safe be replaced by "invariant(db);dropDatabase(opCtx, db);" once fixed.
log() << "dropReplicatedDatabases - database disappeared after retrieving list of "
"database names but before drop: "
<< dbName;
}
});
}
invariant(hasLocalDatabase, "local database missing");
log() << "dropReplicatedDatabases - dropped " << dbNames.size() << " databases";
return Status::OK();
}
Status StorageInterfaceImpl::createOplog(OperationContext* opCtx, const NamespaceString& nss) {
mongo::repl::createOplog(opCtx, nss, true);
return Status::OK();
}
StatusWith<size_t> StorageInterfaceImpl::getOplogMaxSize(OperationContext* opCtx,
const NamespaceString& nss) {
AutoGetCollectionForReadCommand autoColl(opCtx, nss);
auto collectionResult = getCollection(autoColl, nss, "Your oplog doesn't exist.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
const auto options = DurableCatalog::get(opCtx)->getCollectionOptions(opCtx, nss);
if (!options.capped)
return {ErrorCodes::BadValue, str::stream() << nss.ns() << " isn't capped"};
return options.cappedSize;
}
Status StorageInterfaceImpl::createCollection(OperationContext* opCtx,
const NamespaceString& nss,
const CollectionOptions& options) {
return writeConflictRetry(opCtx, "StorageInterfaceImpl::createCollection", nss.ns(), [&] {
AutoGetOrCreateDb databaseWriteGuard(opCtx, nss.db(), MODE_X);
auto db = databaseWriteGuard.getDb();
invariant(db);
if (db->getCollection(opCtx, nss)) {
return Status(ErrorCodes::NamespaceExists,
str::stream() << "Collection " << nss.ns() << " already exists.");
}
WriteUnitOfWork wuow(opCtx);
try {
auto coll = db->createCollection(opCtx, nss, options);
invariant(coll);
} catch (const AssertionException& ex) {
return ex.toStatus();
}
wuow.commit();
return Status::OK();
});
}
Status StorageInterfaceImpl::dropCollection(OperationContext* opCtx, const NamespaceString& nss) {
return writeConflictRetry(opCtx, "StorageInterfaceImpl::dropCollection", nss.ns(), [&] {
AutoGetDb autoDb(opCtx, nss.db(), MODE_IX);
Lock::CollectionLock collLock(opCtx, nss, MODE_X);
if (!autoDb.getDb()) {
// Database does not exist - nothing to do.
return Status::OK();
}
WriteUnitOfWork wunit(opCtx);
const auto status = autoDb.getDb()->dropCollectionEvenIfSystem(opCtx, nss);
if (!status.isOK()) {
return status;
}
wunit.commit();
return Status::OK();
});
}
Status StorageInterfaceImpl::truncateCollection(OperationContext* opCtx,
const NamespaceString& nss) {
return writeConflictRetry(opCtx, "StorageInterfaceImpl::truncateCollection", nss.ns(), [&] {
AutoGetCollection autoColl(opCtx, nss, MODE_X);
auto collectionResult =
getCollection(autoColl, nss, "The collection must exist before truncating.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
WriteUnitOfWork wunit(opCtx);
const auto status = collection->truncate(opCtx);
if (!status.isOK()) {
return status;
}
wunit.commit();
return Status::OK();
});
}
Status StorageInterfaceImpl::renameCollection(OperationContext* opCtx,
const NamespaceString& fromNS,
const NamespaceString& toNS,
bool stayTemp) {
if (fromNS.db() != toNS.db()) {
return Status(ErrorCodes::InvalidNamespace,
str::stream() << "Cannot rename collection between databases. From NS: "
<< fromNS.ns()
<< "; to NS: "
<< toNS.ns());
}
return writeConflictRetry(opCtx, "StorageInterfaceImpl::renameCollection", fromNS.ns(), [&] {
AutoGetDb autoDB(opCtx, fromNS.db(), MODE_X);
if (!autoDB.getDb()) {
return Status(ErrorCodes::NamespaceNotFound,
str::stream() << "Cannot rename collection from " << fromNS.ns() << " to "
<< toNS.ns()
<< ". Database "
<< fromNS.db()
<< " not found.");
}
WriteUnitOfWork wunit(opCtx);
const auto status = autoDB.getDb()->renameCollection(opCtx, fromNS, toNS, stayTemp);
if (!status.isOK()) {
return status;
}
wunit.commit();
return status;
});
}
Status StorageInterfaceImpl::setIndexIsMultikey(OperationContext* opCtx,
const NamespaceString& nss,
const std::string& indexName,
const MultikeyPaths& paths,
Timestamp ts) {
if (ts.isNull()) {
return Status(ErrorCodes::InvalidOptions,
str::stream() << "Cannot set index " << indexName << " on " << nss.ns()
<< " as multikey at null timestamp");
}
return writeConflictRetry(opCtx, "StorageInterfaceImpl::setIndexIsMultikey", nss.ns(), [&] {
AutoGetCollection autoColl(opCtx, nss, MODE_IX);
auto collectionResult = getCollection(
autoColl, nss, "The collection must exist before setting an index to multikey.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
WriteUnitOfWork wunit(opCtx);
auto tsResult = opCtx->recoveryUnit()->setTimestamp(ts);
if (!tsResult.isOK()) {
return tsResult;
}
auto idx = collection->getIndexCatalog()->findIndexByName(
opCtx, indexName, true /* includeUnfinishedIndexes */);
if (!idx) {
return Status(ErrorCodes::IndexNotFound,
str::stream() << "Could not find index " << indexName << " in "
<< nss.ns()
<< " to set to multikey.");
}
collection->getIndexCatalog()->setMultikeyPaths(opCtx, idx, paths);
wunit.commit();
return Status::OK();
});
}
namespace {
/**
* Returns DeleteStageParams for deleteOne with fetch.
*/
std::unique_ptr<DeleteStageParams> makeDeleteStageParamsForDeleteDocuments() {
auto deleteStageParams = std::make_unique<DeleteStageParams>();
deleteStageParams->isMulti = true;
deleteStageParams->returnDeleted = true;
return deleteStageParams;
}
/**
* Shared implementation between findDocuments, deleteDocuments, and _findOrDeleteById.
* _findOrDeleteById is used by findById, and deleteById.
*/
enum class FindDeleteMode { kFind, kDelete };
StatusWith<std::vector<BSONObj>> _findOrDeleteDocuments(
OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
boost::optional<StringData> indexName,
StorageInterface::ScanDirection scanDirection,
const BSONObj& startKey,
const BSONObj& endKey,
BoundInclusion boundInclusion,
std::size_t limit,
FindDeleteMode mode) {
auto isFind = mode == FindDeleteMode::kFind;
auto opStr = isFind ? "StorageInterfaceImpl::find" : "StorageInterfaceImpl::delete";
return writeConflictRetry(
opCtx, opStr, nsOrUUID.toString(), [&]() -> StatusWith<std::vector<BSONObj>> {
// We need to explicitly use this in a few places to help the type inference. Use a
// shorthand.
using Result = StatusWith<std::vector<BSONObj>>;
auto collectionAccessMode = isFind ? MODE_IS : MODE_IX;
AutoGetCollection autoColl(opCtx, nsOrUUID, collectionAccessMode);
auto collectionResult = getCollection(
autoColl, nsOrUUID, str::stream() << "Unable to proceed with " << opStr << ".");
if (!collectionResult.isOK()) {
return Result(collectionResult.getStatus());
}
auto collection = collectionResult.getValue();
auto isForward = scanDirection == StorageInterface::ScanDirection::kForward;
auto direction = isForward ? InternalPlanner::FORWARD : InternalPlanner::BACKWARD;
std::unique_ptr<PlanExecutor, PlanExecutor::Deleter> planExecutor;
if (!indexName) {
if (!startKey.isEmpty()) {
return Result(ErrorCodes::NoSuchKey,
"non-empty startKey not allowed for collection scan");
}
if (boundInclusion != BoundInclusion::kIncludeStartKeyOnly) {
return Result(
ErrorCodes::InvalidOptions,
"bound inclusion must be BoundInclusion::kIncludeStartKeyOnly for "
"collection scan");
}
// Use collection scan.
planExecutor = isFind
? InternalPlanner::collectionScan(
opCtx, nsOrUUID.toString(), collection, PlanExecutor::NO_YIELD, direction)
: InternalPlanner::deleteWithCollectionScan(
opCtx,
collection,
makeDeleteStageParamsForDeleteDocuments(),
PlanExecutor::NO_YIELD,
direction);
} else {
// Use index scan.
auto indexCatalog = collection->getIndexCatalog();
invariant(indexCatalog);
bool includeUnfinishedIndexes = false;
const IndexDescriptor* indexDescriptor =
indexCatalog->findIndexByName(opCtx, *indexName, includeUnfinishedIndexes);
if (!indexDescriptor) {
return Result(ErrorCodes::IndexNotFound,
str::stream() << "Index not found, ns:" << nsOrUUID.toString()
<< ", index: "
<< *indexName);
}
if (indexDescriptor->isPartial()) {
return Result(ErrorCodes::IndexOptionsConflict,
str::stream()
<< "Partial index is not allowed for this operation, ns:"
<< nsOrUUID.toString()
<< ", index: "
<< *indexName);
}
KeyPattern keyPattern(indexDescriptor->keyPattern());
auto minKey = Helpers::toKeyFormat(keyPattern.extendRangeBound({}, false));
auto maxKey = Helpers::toKeyFormat(keyPattern.extendRangeBound({}, true));
auto bounds =
isForward ? std::make_pair(minKey, maxKey) : std::make_pair(maxKey, minKey);
if (!startKey.isEmpty()) {
bounds.first = startKey;
}
if (!endKey.isEmpty()) {
bounds.second = endKey;
}
planExecutor = isFind ? InternalPlanner::indexScan(opCtx,
collection,
indexDescriptor,
bounds.first,
bounds.second,
boundInclusion,
PlanExecutor::NO_YIELD,
direction,
InternalPlanner::IXSCAN_FETCH)
: InternalPlanner::deleteWithIndexScan(
opCtx,
collection,
makeDeleteStageParamsForDeleteDocuments(),
indexDescriptor,
bounds.first,
bounds.second,
boundInclusion,
PlanExecutor::NO_YIELD,
direction);
}
std::vector<BSONObj> docs;
BSONObj out;
PlanExecutor::ExecState state = PlanExecutor::ExecState::ADVANCED;
while (state == PlanExecutor::ExecState::ADVANCED && docs.size() < limit) {
state = planExecutor->getNext(&out, nullptr);
if (state == PlanExecutor::ExecState::ADVANCED) {
docs.push_back(out.getOwned());
}
}
switch (state) {
case PlanExecutor::ADVANCED:
case PlanExecutor::IS_EOF:
return Result(docs);
case PlanExecutor::FAILURE:
return WorkingSetCommon::getMemberObjectStatus(out);
default:
MONGO_UNREACHABLE;
}
});
}
StatusWith<BSONObj> _findOrDeleteById(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
const BSONElement& idKey,
FindDeleteMode mode) {
auto wrappedIdKey = idKey.wrap("");
auto result = _findOrDeleteDocuments(opCtx,
nsOrUUID,
kIdIndexName,
StorageInterface::ScanDirection::kForward,
wrappedIdKey,
wrappedIdKey,
BoundInclusion::kIncludeBothStartAndEndKeys,
1U,
mode);
if (!result.isOK()) {
return result.getStatus();
}
const auto& docs = result.getValue();
if (docs.empty()) {
return {ErrorCodes::NoSuchKey,
str::stream() << "No document found with _id: " << redact(idKey) << " in namespace "
<< nsOrUUID.toString()};
}
return docs.front();
}
} // namespace
StatusWith<std::vector<BSONObj>> StorageInterfaceImpl::findDocuments(
OperationContext* opCtx,
const NamespaceString& nss,
boost::optional<StringData> indexName,
ScanDirection scanDirection,
const BSONObj& startKey,
BoundInclusion boundInclusion,
std::size_t limit) {
return _findOrDeleteDocuments(opCtx,
nss,
indexName,
scanDirection,
startKey,
{},
boundInclusion,
limit,
FindDeleteMode::kFind);
}
StatusWith<std::vector<BSONObj>> StorageInterfaceImpl::deleteDocuments(
OperationContext* opCtx,
const NamespaceString& nss,
boost::optional<StringData> indexName,
ScanDirection scanDirection,
const BSONObj& startKey,
BoundInclusion boundInclusion,
std::size_t limit) {
return _findOrDeleteDocuments(opCtx,
nss,
indexName,
scanDirection,
startKey,
{},
boundInclusion,
limit,
FindDeleteMode::kDelete);
}
StatusWith<BSONObj> StorageInterfaceImpl::findSingleton(OperationContext* opCtx,
const NamespaceString& nss) {
auto result = findDocuments(opCtx,
nss,
boost::none, // Collection scan.
StorageInterface::ScanDirection::kForward,
{}, // Start at the beginning of the collection.
BoundInclusion::kIncludeStartKeyOnly,
2U); // Ask for 2 documents to ensure it's a singleton.
if (!result.isOK()) {
return result.getStatus();
}
const auto& docs = result.getValue();
if (docs.empty()) {
return {ErrorCodes::CollectionIsEmpty,
str::stream() << "No document found in namespace: " << nss.ns()};
} else if (docs.size() != 1U) {
return {ErrorCodes::TooManyMatchingDocuments,
str::stream() << "More than singleton document found in namespace: " << nss.ns()};
}
return docs.front();
}
StatusWith<BSONObj> StorageInterfaceImpl::findById(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
const BSONElement& idKey) {
return _findOrDeleteById(opCtx, nsOrUUID, idKey, FindDeleteMode::kFind);
}
StatusWith<BSONObj> StorageInterfaceImpl::deleteById(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
const BSONElement& idKey) {
return _findOrDeleteById(opCtx, nsOrUUID, idKey, FindDeleteMode::kDelete);
}
namespace {
/**
* Checks _id key passed to upsertById and returns a query document for UpdateRequest.
*/
StatusWith<BSONObj> makeUpsertQuery(const BSONElement& idKey) {
auto query = BSON("_id" << idKey);
// With the ID hack, only simple _id queries are allowed. Otherwise, UpdateStage will fail with
// a fatal assertion.
if (!CanonicalQuery::isSimpleIdQuery(query)) {
return {ErrorCodes::InvalidIdField,
str::stream() << "Unable to update document with a non-simple _id query: "
<< query};
}
return query;
}
Status _updateWithQuery(OperationContext* opCtx,
const UpdateRequest& request,
const Timestamp& ts) {
invariant(!request.isMulti()); // We only want to update one document for performance.
invariant(!request.shouldReturnAnyDocs());
invariant(PlanExecutor::NO_YIELD == request.getYieldPolicy());
auto& nss = request.getNamespaceString();
return writeConflictRetry(opCtx, "_updateWithQuery", nss.ns(), [&] {
// ParsedUpdate needs to be inside the write conflict retry loop because it may create a
// CanonicalQuery whose ownership will be transferred to the plan executor in
// getExecutorUpdate().
const ExtensionsCallbackReal extensionsCallback(opCtx, &request.getNamespaceString());
ParsedUpdate parsedUpdate(opCtx, &request, extensionsCallback);
auto parsedUpdateStatus = parsedUpdate.parseRequest();
if (!parsedUpdateStatus.isOK()) {
return parsedUpdateStatus;
}
AutoGetCollection autoColl(opCtx, nss, MODE_IX);
auto collectionResult = getCollection(
autoColl,
nss,
str::stream() << "Unable to update documents in " << nss.ns() << " using query "
<< request.getQuery());
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
WriteUnitOfWork wuow(opCtx);
if (!ts.isNull()) {
uassertStatusOK(opCtx->recoveryUnit()->setTimestamp(ts));
}
auto planExecutorResult =
mongo::getExecutorUpdate(opCtx, nullptr, collection, &parsedUpdate);
if (!planExecutorResult.isOK()) {
return planExecutorResult.getStatus();
}
auto planExecutor = std::move(planExecutorResult.getValue());
auto ret = planExecutor->executePlan();
wuow.commit();
return ret;
});
}
} // namespace
Status StorageInterfaceImpl::upsertById(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
const BSONElement& idKey,
const BSONObj& update) {
// Validate and construct an _id query for UpdateResult.
// The _id key will be passed directly to IDHackStage.
auto queryResult = makeUpsertQuery(idKey);
if (!queryResult.isOK()) {
return queryResult.getStatus();
}
auto query = queryResult.getValue();
return writeConflictRetry(opCtx, "StorageInterfaceImpl::upsertById", nsOrUUID.toString(), [&] {
AutoGetCollection autoColl(opCtx, nsOrUUID, MODE_IX);
auto collectionResult = getCollection(autoColl, nsOrUUID, "Unable to update document.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
// We can create an UpdateRequest now that the collection's namespace has been resolved, in
// the event it was specified as a UUID.
UpdateRequest request(collection->ns());
request.setQuery(query);
request.setUpdateModification(update);
request.setUpsert(true);
invariant(!request.isMulti()); // This follows from using an exact _id query.
invariant(!request.shouldReturnAnyDocs());
invariant(PlanExecutor::NO_YIELD == request.getYieldPolicy());
// ParsedUpdate needs to be inside the write conflict retry loop because it contains
// the UpdateDriver whose state may be modified while we are applying the update.
const ExtensionsCallbackReal extensionsCallback(opCtx, &request.getNamespaceString());
ParsedUpdate parsedUpdate(opCtx, &request, extensionsCallback);
auto parsedUpdateStatus = parsedUpdate.parseRequest();
if (!parsedUpdateStatus.isOK()) {
return parsedUpdateStatus;
}
// We're using the ID hack to perform the update so we have to disallow collections
// without an _id index.
auto descriptor = collection->getIndexCatalog()->findIdIndex(opCtx);
if (!descriptor) {
return Status(ErrorCodes::IndexNotFound,
"Unable to update document in a collection without an _id index.");
}
UpdateStageParams updateStageParams(
parsedUpdate.getRequest(), parsedUpdate.getDriver(), nullptr);
auto planExecutor = InternalPlanner::updateWithIdHack(opCtx,
collection,
updateStageParams,
descriptor,
idKey.wrap(""),
parsedUpdate.yieldPolicy());
return planExecutor->executePlan();
});
}
Status StorageInterfaceImpl::putSingleton(OperationContext* opCtx,
const NamespaceString& nss,
const TimestampedBSONObj& update) {
UpdateRequest request(nss);
request.setQuery({});
request.setUpdateModification(update.obj);
request.setUpsert(true);
return _updateWithQuery(opCtx, request, update.timestamp);
}
Status StorageInterfaceImpl::updateSingleton(OperationContext* opCtx,
const NamespaceString& nss,
const BSONObj& query,
const TimestampedBSONObj& update) {
UpdateRequest request(nss);
request.setQuery(query);
request.setUpdateModification(update.obj);
invariant(!request.isUpsert());
return _updateWithQuery(opCtx, request, update.timestamp);
}
Status StorageInterfaceImpl::deleteByFilter(OperationContext* opCtx,
const NamespaceString& nss,
const BSONObj& filter) {
DeleteRequest request(nss);
request.setQuery(filter);
request.setMulti(true);
request.setYieldPolicy(PlanExecutor::NO_YIELD);
// This disables the isLegalClientSystemNS() check in getExecutorDelete() which is used to
// disallow client deletes from unrecognized system collections.
request.setGod();
return writeConflictRetry(opCtx, "StorageInterfaceImpl::deleteByFilter", nss.ns(), [&] {
// ParsedDelete needs to be inside the write conflict retry loop because it may create a
// CanonicalQuery whose ownership will be transferred to the plan executor in
// getExecutorDelete().
ParsedDelete parsedDelete(opCtx, &request);
auto parsedDeleteStatus = parsedDelete.parseRequest();
if (!parsedDeleteStatus.isOK()) {
return parsedDeleteStatus;
}
AutoGetCollection autoColl(opCtx, nss, MODE_IX);
auto collectionResult = getCollection(
autoColl,
nss,
str::stream() << "Unable to delete documents in " << nss.ns() << " using filter "
<< filter);
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
auto planExecutorResult =
mongo::getExecutorDelete(opCtx, nullptr, collection, &parsedDelete);
if (!planExecutorResult.isOK()) {
return planExecutorResult.getStatus();
}
auto planExecutor = std::move(planExecutorResult.getValue());
return planExecutor->executePlan();
});
}
StatusWith<StorageInterface::CollectionSize> StorageInterfaceImpl::getCollectionSize(
OperationContext* opCtx, const NamespaceString& nss) {
AutoGetCollectionForRead autoColl(opCtx, nss);
auto collectionResult =
getCollection(autoColl, nss, "Unable to get total size of documents in collection.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
return collection->dataSize(opCtx);
}
StatusWith<StorageInterface::CollectionCount> StorageInterfaceImpl::getCollectionCount(
OperationContext* opCtx, const NamespaceStringOrUUID& nsOrUUID) {
AutoGetCollectionForRead autoColl(opCtx, nsOrUUID);
auto collectionResult =
getCollection(autoColl, nsOrUUID, "Unable to get number of documents in collection.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
return collection->numRecords(opCtx);
}
Status StorageInterfaceImpl::setCollectionCount(OperationContext* opCtx,
const NamespaceStringOrUUID& nsOrUUID,
long long newCount) {
AutoGetCollection autoColl(opCtx, nsOrUUID, LockMode::MODE_X);
auto collectionResult =
getCollection(autoColl, nsOrUUID, "Unable to set number of documents in collection.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
auto rs = collection->getRecordStore();
// We cannot fix the data size correctly, so we just get the current cached value and keep it
// the same.
long long dataSize = rs->dataSize(opCtx);
rs->updateStatsAfterRepair(opCtx, newCount, dataSize);
return Status::OK();
}
StatusWith<OptionalCollectionUUID> StorageInterfaceImpl::getCollectionUUID(
OperationContext* opCtx, const NamespaceString& nss) {
AutoGetCollectionForRead autoColl(opCtx, nss);
auto collectionResult = getCollection(
autoColl, nss, str::stream() << "Unable to get UUID of " << nss.ns() << " collection.");
if (!collectionResult.isOK()) {
return collectionResult.getStatus();
}
auto collection = collectionResult.getValue();
return collection->uuid();
}
void StorageInterfaceImpl::setStableTimestamp(ServiceContext* serviceCtx, Timestamp snapshotName) {
serviceCtx->getStorageEngine()->setStableTimestamp(snapshotName);
}
void StorageInterfaceImpl::setInitialDataTimestamp(ServiceContext* serviceCtx,
Timestamp snapshotName) {
serviceCtx->getStorageEngine()->setInitialDataTimestamp(snapshotName);
}
StatusWith<Timestamp> StorageInterfaceImpl::recoverToStableTimestamp(OperationContext* opCtx) {
return opCtx->getServiceContext()->getStorageEngine()->recoverToStableTimestamp(opCtx);
}
bool StorageInterfaceImpl::supportsRecoverToStableTimestamp(ServiceContext* serviceCtx) const {
return serviceCtx->getStorageEngine()->supportsRecoverToStableTimestamp();
}
bool StorageInterfaceImpl::supportsRecoveryTimestamp(ServiceContext* serviceCtx) const {
return serviceCtx->getStorageEngine()->supportsRecoveryTimestamp();
}
boost::optional<Timestamp> StorageInterfaceImpl::getRecoveryTimestamp(
ServiceContext* serviceCtx) const {
return serviceCtx->getStorageEngine()->getRecoveryTimestamp();
}
Status StorageInterfaceImpl::isAdminDbValid(OperationContext* opCtx) {
AutoGetDb autoDB(opCtx, "admin", MODE_X);
auto adminDb = autoDB.getDb();
if (!adminDb) {
return Status::OK();
}
Collection* const usersCollection =
adminDb->getCollection(opCtx, AuthorizationManager::usersCollectionNamespace);
const bool hasUsers =
usersCollection && !Helpers::findOne(opCtx, usersCollection, BSONObj(), false).isNull();
Collection* const adminVersionCollection =
adminDb->getCollection(opCtx, AuthorizationManager::versionCollectionNamespace);
BSONObj authSchemaVersionDocument;
if (!adminVersionCollection ||
!Helpers::findOne(opCtx,
adminVersionCollection,
AuthorizationManager::versionDocumentQuery,
authSchemaVersionDocument)) {
if (!hasUsers) {
// It's OK to have no auth version document if there are no user documents.
return Status::OK();
}
std::string msg = str::stream()
<< "During initial sync, found documents in "
<< AuthorizationManager::usersCollectionNamespace.ns()
<< " but could not find an auth schema version document in "
<< AuthorizationManager::versionCollectionNamespace.ns() << ". "
<< "This indicates that the primary of this replica set was not successfully "
"upgraded to schema version "
<< AuthorizationManager::schemaVersion26Final
<< ", which is the minimum supported schema version in this version of MongoDB";
return {ErrorCodes::AuthSchemaIncompatible, msg};
}
long long foundSchemaVersion;
Status status = bsonExtractIntegerField(authSchemaVersionDocument,
AuthorizationManager::schemaVersionFieldName,
&foundSchemaVersion);
if (!status.isOK()) {
std::string msg = str::stream()
<< "During initial sync, found malformed auth schema version document: "
<< status.toString() << "; document: " << authSchemaVersionDocument;
return {ErrorCodes::AuthSchemaIncompatible, msg};
}
if ((foundSchemaVersion != AuthorizationManager::schemaVersion26Final) &&
(foundSchemaVersion != AuthorizationManager::schemaVersion28SCRAM)) {
std::string msg = str::stream()
<< "During initial sync, found auth schema version " << foundSchemaVersion
<< ", but this version of MongoDB only supports schema versions "
<< AuthorizationManager::schemaVersion26Final << " and "
<< AuthorizationManager::schemaVersion28SCRAM;
return {ErrorCodes::AuthSchemaIncompatible, msg};
}
return Status::OK();
}
void StorageInterfaceImpl::waitForAllEarlierOplogWritesToBeVisible(OperationContext* opCtx,
bool primaryOnly) {
Lock::GlobalLock lk(opCtx, MODE_IS);
if (primaryOnly &&
!repl::ReplicationCoordinator::get(opCtx)->canAcceptWritesForDatabase(opCtx, "admin"))
return;
Collection* oplog;
{
// We don't want to be holding the collection lock while blocking, to avoid deadlocks.
// It is safe to store and access the oplog's Collection object with just the global IS
// lock because of the special concurrency rules for the oplog.
// TODO(spencer): It should be possible to get the pointer to the oplog Collection object
// without ever having to take the collection lock.
AutoGetCollection oplogLock(opCtx, NamespaceString::kRsOplogNamespace, MODE_IS);
oplog = oplogLock.getCollection();
}
uassert(ErrorCodes::NotYetInitialized, "The oplog does not exist", oplog);
oplog->getRecordStore()->waitForAllEarlierOplogWritesToBeVisible(opCtx);
}
void StorageInterfaceImpl::oplogDiskLocRegister(OperationContext* opCtx,
const Timestamp& ts,
bool orderedCommit) {
AutoGetCollection oplog(opCtx, NamespaceString::kRsOplogNamespace, MODE_IS);
fassert(
28557,
oplog.getCollection()->getRecordStore()->oplogDiskLocRegister(opCtx, ts, orderedCommit));
}
boost::optional<Timestamp> StorageInterfaceImpl::getLastStableRecoveryTimestamp(
ServiceContext* serviceCtx) const {
if (!supportsRecoverToStableTimestamp(serviceCtx)) {
return boost::none;
}
const auto ret = serviceCtx->getStorageEngine()->getLastStableRecoveryTimestamp();
if (ret == boost::none) {
return Timestamp::min();
}
return ret;
}
bool StorageInterfaceImpl::supportsDocLocking(ServiceContext* serviceCtx) const {
return serviceCtx->getStorageEngine()->supportsDocLocking();
}
Timestamp StorageInterfaceImpl::getAllCommittedTimestamp(ServiceContext* serviceCtx) const {
return serviceCtx->getStorageEngine()->getAllCommittedTimestamp();
}
Timestamp StorageInterfaceImpl::getOldestOpenReadTimestamp(ServiceContext* serviceCtx) const {
return serviceCtx->getStorageEngine()->getOldestOpenReadTimestamp();
}
Timestamp StorageInterfaceImpl::getPointInTimeReadTimestamp(OperationContext* opCtx) const {
auto readTimestamp = opCtx->recoveryUnit()->getPointInTimeReadTimestamp();
invariant(readTimestamp);
return *readTimestamp;
}
} // namespace repl
} // namespace mongo
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