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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/platform/basic.h"
#include "mongo/db/transaction_validation.h"
#include <fmt/format.h>
#include "mongo/db/commands.h"
#include "mongo/db/commands/txn_cmds_gen.h"
#include "mongo/db/commands/txn_two_phase_commit_cmds_gen.h"
#include "mongo/db/logical_session_id.h"
#include "mongo/db/write_concern_options.h"
namespace mongo {
using namespace fmt::literals;
namespace {
const StringMap<int> retryableWriteCommands = {{"delete", 1},
{"findandmodify", 1},
{"findAndModify", 1},
{"insert", 1},
{"update", 1},
{"_recvChunkStart", 1}};
// Commands that can be sent with session info but should not check out a session.
const StringMap<int> skipSessionCheckoutList = {
{"coordinateCommitTransaction", 1}, {"_recvChunkStart", 1}, {"replSetStepDown", 1}};
const StringMap<int> transactionCommands = {{"commitTransaction", 1},
{"coordinateCommitTransaction", 1},
{"abortTransaction", 1},
{"prepareTransaction", 1}};
bool isRetryableWriteCommand(StringData cmdName) {
return retryableWriteCommands.find(cmdName) != retryableWriteCommands.cend();
}
} // namespace
bool isTransactionCommand(StringData cmdName) {
return transactionCommands.find(cmdName) != transactionCommands.cend();
}
void validateWriteConcernForTransaction(const WriteConcernOptions& wcResult, StringData cmdName) {
uassert(ErrorCodes::InvalidOptions,
"writeConcern is not allowed within a multi-statement transaction",
wcResult.usedDefault || isTransactionCommand(cmdName));
}
bool isReadConcernLevelAllowedInTransaction(repl::ReadConcernLevel readConcernLevel) {
return readConcernLevel == repl::ReadConcernLevel::kSnapshotReadConcern ||
readConcernLevel == repl::ReadConcernLevel::kMajorityReadConcern ||
readConcernLevel == repl::ReadConcernLevel::kLocalReadConcern;
}
bool shouldCommandSkipSessionCheckout(StringData cmdName) {
return skipSessionCheckoutList.find(cmdName) != skipSessionCheckoutList.cend();
}
void validateSessionOptions(const OperationSessionInfoFromClient& sessionOptions,
StringData cmdName,
const NamespaceString& nss,
bool allowTransactionsOnConfigDatabase) {
if (sessionOptions.getAutocommit()) {
CommandHelpers::canUseTransactions(nss, cmdName, allowTransactionsOnConfigDatabase);
}
if (!sessionOptions.getAutocommit() && sessionOptions.getTxnNumber()) {
uassert(50768,
"txnNumber may only be provided for multi-document transactions and retryable "
"write commands. autocommit:false was not provided, and {} is not a retryable "
"write command."_format(cmdName),
isRetryableWriteCommand(cmdName));
}
if (sessionOptions.getStartTransaction()) {
uassert(ErrorCodes::OperationNotSupportedInTransaction,
"Cannot run killCursors as the first operation in a multi-document transaction.",
cmdName != "killCursors");
uassert(ErrorCodes::OperationNotSupportedInTransaction,
"Cannot start a transaction with a prepare",
cmdName != PrepareTransaction::kCommandName);
uassert(ErrorCodes::OperationNotSupportedInTransaction,
"Cannot start a transaction with a commit",
cmdName != CommitTransaction::kCommandName);
uassert(ErrorCodes::OperationNotSupportedInTransaction,
"Cannot start a transaction with an abort",
cmdName != AbortTransaction::kCommandName);
}
}
} // namespace mongo
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