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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::kCommand
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/drop_collection.h"
#include "mongo/db/background.h"
#include "mongo/db/catalog/index_catalog.h"
#include "mongo/db/client.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/curop.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/index_builds_coordinator.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
#include "mongo/db/views/view_catalog.h"
#include "mongo/util/fail_point_service.h"
#include "mongo/util/log.h"
namespace mongo {
MONGO_FAIL_POINT_DEFINE(hangDropCollectionBeforeLockAcquisition);
MONGO_FAIL_POINT_DEFINE(hangDuringDropCollection);
Status _dropView(OperationContext* opCtx,
Database* db,
const NamespaceString& collectionName,
BSONObjBuilder& result) {
if (!db) {
return Status(ErrorCodes::NamespaceNotFound, "ns not found");
}
auto view = ViewCatalog::get(db)->lookup(opCtx, collectionName.ns());
if (!view) {
return Status(ErrorCodes::NamespaceNotFound, "ns not found");
}
Lock::CollectionLock collLock(opCtx, collectionName, MODE_IX);
// Operations all lock system.views in the end to prevent deadlock.
Lock::CollectionLock systemViewsLock(opCtx, db->getSystemViewsName(), MODE_X);
if (MONGO_FAIL_POINT(hangDuringDropCollection)) {
log() << "hangDuringDropCollection fail point enabled. Blocking until fail point is "
"disabled.";
MONGO_FAIL_POINT_PAUSE_WHILE_SET(hangDuringDropCollection);
}
AutoStatsTracker statsTracker(opCtx,
collectionName,
Top::LockType::NotLocked,
AutoStatsTracker::LogMode::kUpdateTopAndCurop,
db->getProfilingLevel());
if (opCtx->writesAreReplicated() &&
!repl::ReplicationCoordinator::get(opCtx)->canAcceptWritesFor(opCtx, collectionName)) {
return Status(ErrorCodes::NotMaster,
str::stream() << "Not primary while dropping collection " << collectionName);
}
WriteUnitOfWork wunit(opCtx);
Status status = db->dropView(opCtx, collectionName);
if (!status.isOK()) {
return status;
}
wunit.commit();
result.append("ns", collectionName.ns());
return Status::OK();
}
Status _dropCollection(OperationContext* opCtx,
Database* db,
const NamespaceString& collectionName,
const repl::OpTime& dropOpTime,
DropCollectionSystemCollectionMode systemCollectionMode,
BSONObjBuilder& result) {
Lock::CollectionLock collLock(opCtx, collectionName, MODE_X);
Collection* coll = db->getCollection(opCtx, collectionName);
if (!coll) {
return Status(ErrorCodes::NamespaceNotFound, "ns not found");
}
if (MONGO_FAIL_POINT(hangDuringDropCollection)) {
log() << "hangDuringDropCollection fail point enabled. Blocking until fail point is "
"disabled.";
MONGO_FAIL_POINT_PAUSE_WHILE_SET(hangDuringDropCollection);
}
AutoStatsTracker statsTracker(opCtx,
collectionName,
Top::LockType::NotLocked,
AutoStatsTracker::LogMode::kUpdateTopAndCurop,
db->getProfilingLevel());
if (opCtx->writesAreReplicated() &&
!repl::ReplicationCoordinator::get(opCtx)->canAcceptWritesFor(opCtx, collectionName)) {
return Status(ErrorCodes::NotMaster,
str::stream() << "Not primary while dropping collection " << collectionName);
}
WriteUnitOfWork wunit(opCtx);
int numIndexes = coll->getIndexCatalog()->numIndexesTotal(opCtx);
BackgroundOperation::assertNoBgOpInProgForNs(collectionName.ns());
IndexBuildsCoordinator::get(opCtx)->assertNoIndexBuildInProgForCollection(coll->uuid());
Status status =
systemCollectionMode == DropCollectionSystemCollectionMode::kDisallowSystemCollectionDrops
? db->dropCollection(opCtx, collectionName, dropOpTime)
: db->dropCollectionEvenIfSystem(opCtx, collectionName, dropOpTime);
if (!status.isOK()) {
return status;
}
wunit.commit();
result.append("nIndexesWas", numIndexes);
result.append("ns", collectionName.ns());
return Status::OK();
}
Status dropCollection(OperationContext* opCtx,
const NamespaceString& collectionName,
BSONObjBuilder& result,
const repl::OpTime& dropOpTime,
DropCollectionSystemCollectionMode systemCollectionMode) {
if (!serverGlobalParams.quiet.load()) {
log() << "CMD: drop " << collectionName;
}
if (MONGO_FAIL_POINT(hangDropCollectionBeforeLockAcquisition)) {
log() << "Hanging drop collection before lock acquisition while fail point is set";
MONGO_FAIL_POINT_PAUSE_WHILE_SET(hangDropCollectionBeforeLockAcquisition);
}
return writeConflictRetry(opCtx, "drop", collectionName.ns(), [&] {
AutoGetDb autoDb(opCtx, collectionName.db(), MODE_IX);
Database* db = autoDb.getDb();
if (!db) {
return Status(ErrorCodes::NamespaceNotFound, "ns not found");
}
Collection* coll = db->getCollection(opCtx, collectionName);
if (!coll) {
return _dropView(opCtx, db, collectionName, result);
} else {
return _dropCollection(
opCtx, db, collectionName, dropOpTime, systemCollectionMode, result);
}
});
}
} // namespace mongo
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