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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::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/index_builds_manager.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_catalog_entry.h"
#include "mongo/db/catalog/database_catalog_entry.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/storage/write_unit_of_work.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/log.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace {
/**
* Returns basic info on index builders.
*/
std::string toSummary(const std::map<UUID, std::shared_ptr<MultiIndexBlock>>& builders) {
str::stream ss;
ss << "Number of builders: " << builders.size() << ": [";
bool first = true;
for (const auto& pair : builders) {
if (!first) {
ss << ", ";
}
ss << pair.first;
first = false;
}
ss << "]";
return ss;
}
} // namespace
IndexBuildsManager::~IndexBuildsManager() {
invariant(_builders.empty(),
str::stream() << "Index builds still active: " << toSummary(_builders));
}
Status IndexBuildsManager::setUpIndexBuild(OperationContext* opCtx,
Collection* collection,
const std::vector<BSONObj>& specs,
const UUID& buildUUID,
OnInitFn onInit) {
_registerIndexBuild(opCtx, collection, buildUUID);
const auto& nss = collection->ns();
invariant(opCtx->lockState()->isCollectionLockedForMode(nss.ns(), MODE_X),
str::stream() << "Unable to set up index build " << buildUUID << ": collection "
<< nss.ns()
<< " is not locked in exclusive mode.");
auto builder = _getBuilder(buildUUID);
auto initResult = writeConflictRetry(
opCtx, "IndexBuildsManager::setUpIndexBuild", nss.ns(), [opCtx, builder, &onInit, &specs] {
return builder->init(specs, onInit);
});
if (!initResult.isOK()) {
return initResult.getStatus();
}
log() << "Index build initialized: " << buildUUID << ": " << nss << " (" << *collection->uuid()
<< " ): indexes: " << initResult.getValue().size();
return Status::OK();
}
StatusWith<IndexBuildRecoveryState> IndexBuildsManager::recoverIndexBuild(
const NamespaceString& nss, const UUID& buildUUID, std::vector<std::string> indexNames) {
// TODO: Not yet implemented.
return IndexBuildRecoveryState::Building;
}
Status IndexBuildsManager::startBuildingIndex(const UUID& buildUUID) {
auto builder = _getBuilder(buildUUID);
return builder->insertAllDocumentsInCollection();
}
StatusWith<std::pair<long long, long long>> IndexBuildsManager::startBuildingIndexForRecovery(
OperationContext* opCtx, NamespaceString ns, const UUID& buildUUID) {
auto builder = _getBuilder(buildUUID);
auto const storageEngine = opCtx->getServiceContext()->getStorageEngine();
auto dbCatalogEntry = storageEngine->getDatabaseCatalogEntry(opCtx, ns.db());
auto rs = dbCatalogEntry->getRecordStore(ns.ns());
// Iterate all records in the collection. Delete them if they aren't valid BSON. Index them
// if they are.
long long numRecords = 0;
long long dataSize = 0;
auto cursor = rs->getCursor(opCtx);
auto record = cursor->next();
while (record) {
opCtx->checkForInterrupt();
// Cursor is left one past the end of the batch inside writeConflictRetry
auto beginBatchId = record->id;
Status status = writeConflictRetry(opCtx, "repairDatabase", ns.ns(), [&] {
// In the case of WCE in a partial batch, we need to go back to the beginning
if (!record || (beginBatchId != record->id)) {
record = cursor->seekExact(beginBatchId);
}
WriteUnitOfWork wunit(opCtx);
for (int i = 0; record && i < internalInsertMaxBatchSize.load(); i++) {
RecordId id = record->id;
RecordData& data = record->data;
// Use the latest BSON validation version. We retain decimal data when repairing
// database even if decimal is disabled.
auto validStatus = validateBSON(data.data(), data.size(), BSONVersion::kLatest);
if (!validStatus.isOK()) {
warning() << "Invalid BSON detected at " << id << ": " << redact(validStatus)
<< ". Deleting.";
rs->deleteRecord(opCtx, id);
} else {
numRecords++;
dataSize += data.size();
auto insertStatus = builder->insert(data.releaseToBson(), id);
if (!insertStatus.isOK()) {
return insertStatus;
}
}
record = cursor->next();
}
cursor->save(); // Can't fail per API definition
// When this exits via success or WCE, we need to restore the cursor
ON_BLOCK_EXIT([opCtx, ns, &cursor]() {
// restore CAN throw WCE per API
writeConflictRetry(
opCtx, "retryRestoreCursor", ns.ns(), [&cursor] { cursor->restore(); });
});
wunit.commit();
return Status::OK();
});
if (!status.isOK()) {
return status;
}
}
Status status = builder->dumpInsertsFromBulk();
if (!status.isOK()) {
return status;
}
return std::make_pair(numRecords, dataSize);
}
Status IndexBuildsManager::drainBackgroundWrites(const UUID& buildUUID) {
auto builder = _getBuilder(buildUUID);
return builder->drainBackgroundWrites();
}
Status IndexBuildsManager::finishBuildingPhase(const UUID& buildUUID) {
auto multiIndexBlockPtr = _getBuilder(buildUUID);
// TODO: verify that the index builder is in the expected state.
// TODO: Not yet implemented.
return Status::OK();
}
Status IndexBuildsManager::checkIndexConstraintViolations(const UUID& buildUUID) {
auto builder = _getBuilder(buildUUID);
return builder->checkConstraints();
}
Status IndexBuildsManager::commitIndexBuild(OperationContext* opCtx,
const NamespaceString& nss,
const UUID& buildUUID,
MultiIndexBlock::OnCreateEachFn onCreateEachFn,
MultiIndexBlock::OnCommitFn onCommitFn) {
auto builder = _getBuilder(buildUUID);
return writeConflictRetry(opCtx,
"IndexBuildsManager::commitIndexBuild",
nss.ns(),
[builder, opCtx, &onCreateEachFn, &onCommitFn] {
WriteUnitOfWork wunit(opCtx);
auto status = builder->commit(onCreateEachFn, onCommitFn);
if (!status.isOK()) {
return status;
}
wunit.commit();
return Status::OK();
});
}
bool IndexBuildsManager::abortIndexBuild(const UUID& buildUUID, const std::string& reason) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
auto builderIt = _builders.find(buildUUID);
if (builderIt == _builders.end()) {
return false;
}
builderIt->second->abort(reason);
return true;
}
bool IndexBuildsManager::interruptIndexBuild(const UUID& buildUUID, const std::string& reason) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
auto builderIt = _builders.find(buildUUID);
if (builderIt == _builders.end()) {
return false;
}
// TODO: Not yet implemented.
return true;
}
void IndexBuildsManager::tearDownIndexBuild(const UUID& buildUUID) {
// TODO verify that the index builder is in a finished state before allowing its destruction.
_unregisterIndexBuild(buildUUID);
}
bool IndexBuildsManager::isBackgroundBuilding(const UUID& buildUUID) {
auto builder = _getBuilder(buildUUID);
return builder->isBackgroundBuilding();
}
void IndexBuildsManager::initializeIndexesWithoutCleanupForRecovery(
OperationContext* opCtx, Collection* collection, const std::vector<BSONObj>& indexSpecs) {
// Sanity check to ensure we're in recovery mode.
invariant(opCtx->lockState()->isW());
invariant(indexSpecs.size() > 0);
MultiIndexBlock indexer(opCtx, collection);
WriteUnitOfWork wuow(opCtx);
invariant(indexer.init(indexSpecs, MultiIndexBlock::kNoopOnInitFn).isOK());
wuow.commit();
}
void IndexBuildsManager::verifyNoIndexBuilds_forTestOnly() {
invariant(_builders.empty());
}
void IndexBuildsManager::_registerIndexBuild(OperationContext* opCtx,
Collection* collection,
UUID buildUUID) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
std::shared_ptr<MultiIndexBlock> mib = std::make_shared<MultiIndexBlock>(opCtx, collection);
invariant(_builders.insert(std::make_pair(buildUUID, mib)).second);
}
void IndexBuildsManager::_unregisterIndexBuild(const UUID& buildUUID) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
auto builderIt = _builders.find(buildUUID);
invariant(builderIt != _builders.end());
_builders.erase(builderIt);
}
std::shared_ptr<MultiIndexBlock> IndexBuildsManager::_getBuilder(const UUID& buildUUID) {
stdx::unique_lock<stdx::mutex> lk(_mutex);
auto builderIt = _builders.find(buildUUID);
invariant(builderIt != _builders.end());
return builderIt->second;
}
} // namespace mongo
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