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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.
*/
#include "mongo/db/commands/test_commands.h"
#include <string>
#include "mongo/base/init.h"
#include "mongo/db/catalog/capped_collection_maintenance.h"
#include "mongo/db/catalog/capped_utils.h"
#include "mongo/db/catalog/collection_write_path.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/test_commands_enabled.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/index_builds_coordinator.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/op_observer/op_observer.h"
#include "mongo/db/ops/insert.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/service_context.h"
#include "mongo/logv2/log.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kCommand
namespace mongo {
namespace {
const NamespaceString kDurableHistoryTestNss("mdb_testing.pinned_timestamp");
const std::string kTestingDurableHistoryPinName = "_testing";
using repl::UnreplicatedWritesBlock;
using std::endl;
using std::string;
using std::stringstream;
/* For testing only, not for general use. Enabled via command-line */
class GodInsert : public BasicCommand {
public:
GodInsert() : BasicCommand("godinsert") {}
virtual bool adminOnly() const {
return false;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
// No auth needed because it only works when enabled via command line.
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const {}
std::string help() const override {
return "internal. for testing only.";
}
bool run(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
LOGV2(20505,
"Test-only command 'godinsert' invoked coll:{collection}",
"Test-only command 'godinsert' invoked",
"collection"_attr = nss.coll());
BSONObj obj = cmdObj["obj"].embeddedObjectUserCheck();
Lock::DBLock lk(opCtx, dbName, MODE_X);
OldClientContext ctx(opCtx, nss);
Database* db = ctx.db();
WriteUnitOfWork wunit(opCtx);
UnreplicatedWritesBlock unreplicatedWritesBlock(opCtx);
CollectionPtr collection =
CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(opCtx, nss);
if (!collection) {
collection = db->createCollection(opCtx, nss);
uassert(ErrorCodes::CannotCreateCollection, "could not create collection", collection);
}
OpDebug* const nullOpDebug = nullptr;
Status status = collection_internal::insertDocument(
opCtx, collection, InsertStatement(obj), nullOpDebug, false);
if (status.isOK()) {
wunit.commit();
}
uassertStatusOK(status);
return true;
}
};
MONGO_REGISTER_TEST_COMMAND(GodInsert);
// Testing only, enabled via command-line.
class CapTrunc : public BasicCommand {
public:
CapTrunc() : BasicCommand("captrunc") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
// No auth needed because it only works when enabled via command line.
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const {}
virtual bool run(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
const NamespaceString fullNs = CommandHelpers::parseNsCollectionRequired(dbName, cmdObj);
if (!fullNs.isValid()) {
uasserted(ErrorCodes::InvalidNamespace,
str::stream() << "collection name " << fullNs.ns() << " is not valid");
}
int n = cmdObj.getIntField("n");
bool inc = cmdObj.getBoolField("inc"); // inclusive range?
if (n <= 0) {
uasserted(ErrorCodes::BadValue, "n must be a positive integer");
}
// Lock the database in mode IX and lock the collection exclusively.
AutoGetCollection collection(opCtx, fullNs, MODE_X);
if (!collection) {
uasserted(ErrorCodes::NamespaceNotFound,
str::stream() << "collection " << fullNs.ns() << " does not exist");
}
if (!collection->isCapped()) {
uasserted(ErrorCodes::IllegalOperation, "collection must be capped");
}
RecordId end;
{
// Scan backwards through the collection to find the document to start truncating from.
// We will remove 'n' documents, so start truncating from the (n + 1)th document to the
// end.
auto exec = InternalPlanner::collectionScan(opCtx,
&collection.getCollection(),
PlanYieldPolicy::YieldPolicy::NO_YIELD,
InternalPlanner::BACKWARD);
for (int i = 0; i < n + 1; ++i) {
PlanExecutor::ExecState state = exec->getNext(static_cast<BSONObj*>(nullptr), &end);
if (PlanExecutor::ADVANCED != state) {
uasserted(ErrorCodes::IllegalOperation,
str::stream() << "invalid n, collection contains fewer than " << n
<< " documents");
}
}
}
IndexBuildsCoordinator::get(opCtx)->assertNoIndexBuildInProgForCollection(
collection->uuid());
collection_internal::cappedTruncateAfter(opCtx, *collection, end, inc);
return true;
}
};
MONGO_REGISTER_TEST_COMMAND(CapTrunc);
// Testing-only, enabled via command line.
class EmptyCapped : public BasicCommand {
public:
EmptyCapped() : BasicCommand("emptycapped") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
// No auth needed because it only works when enabled via command line.
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const {}
virtual bool run(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
const NamespaceString nss = CommandHelpers::parseNsCollectionRequired(dbName, cmdObj);
uassertStatusOK(emptyCapped(opCtx, nss));
return true;
}
};
MONGO_REGISTER_TEST_COMMAND(EmptyCapped);
class DurableHistoryReplicatedTestCmd : public BasicCommand {
public:
DurableHistoryReplicatedTestCmd() : BasicCommand("pinHistoryReplicated") {}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kNever;
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool adminOnly() const override {
return true;
}
bool requiresAuth() const override {
return false;
}
// No auth needed because it only works when enabled via command line.
void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const override {}
std::string help() const override {
return "pins the oldest timestamp";
}
bool run(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const Timestamp requestedPinTs = cmdObj.firstElement().timestamp();
const bool round = cmdObj["round"].booleanSafe();
AutoGetDb autoDb(opCtx, kDurableHistoryTestNss.dbName(), MODE_IX);
Lock::CollectionLock collLock(opCtx, kDurableHistoryTestNss, MODE_IX);
if (!CollectionCatalog::get(opCtx)->lookupCollectionByNamespace(
opCtx,
kDurableHistoryTestNss)) { // someone else may have beat us to it.
uassertStatusOK(userAllowedCreateNS(opCtx, kDurableHistoryTestNss));
WriteUnitOfWork wuow(opCtx);
CollectionOptions defaultCollectionOptions;
auto db = autoDb.ensureDbExists(opCtx);
uassertStatusOK(
db->userCreateNS(opCtx, kDurableHistoryTestNss, defaultCollectionOptions));
wuow.commit();
}
AutoGetCollection autoColl(opCtx, kDurableHistoryTestNss, MODE_IX);
WriteUnitOfWork wuow(opCtx);
// Note, this write will replicate to secondaries, but a secondary will not in-turn pin the
// oldest timestamp. The write otherwise must be timestamped in a storage engine table with
// logging disabled. This is to test that rolling back the written document also results in
// the pin being lifted.
Timestamp pinTs =
uassertStatusOK(opCtx->getServiceContext()->getStorageEngine()->pinOldestTimestamp(
opCtx, kTestingDurableHistoryPinName, requestedPinTs, round));
uassertStatusOK(collection_internal::insertDocument(
opCtx,
*autoColl,
InsertStatement(fixDocumentForInsert(opCtx, BSON("pinTs" << pinTs)).getValue()),
nullptr));
wuow.commit();
result.append("requestedPinTs", requestedPinTs);
result.append("pinTs", pinTs);
return true;
}
};
MONGO_REGISTER_TEST_COMMAND(DurableHistoryReplicatedTestCmd);
} // namespace
std::string TestingDurableHistoryPin::getName() {
return kTestingDurableHistoryPinName;
}
boost::optional<Timestamp> TestingDurableHistoryPin::calculatePin(OperationContext* opCtx) {
AutoGetCollectionForRead autoColl(opCtx, kDurableHistoryTestNss);
if (!autoColl) {
return boost::none;
}
Timestamp ret = Timestamp::max();
auto cursor = autoColl->getCursor(opCtx);
for (auto doc = cursor->next(); doc; doc = cursor->next()) {
const BSONObj obj = doc.value().data.toBson();
const Timestamp ts = obj["pinTs"].timestamp();
ret = std::min(ret, ts);
}
if (ret == Timestamp::min()) {
return boost::none;
}
return ret;
}
} // namespace mongo
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