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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/rpc/metadata.h"
#include "mongo/client/dbclientinterface.h"
#include "mongo/db/jsobj.h"
#include "mongo/rpc/metadata/audit_metadata.h"
#include "mongo/rpc/metadata/config_server_metadata.h"
#include "mongo/rpc/metadata/sharding_metadata.h"
#include "mongo/rpc/metadata/server_selection_metadata.h"
namespace mongo {
namespace rpc {
BSONObj makeEmptyMetadata() {
return BSONObj();
}
Status readRequestMetadata(OperationContext* txn, const BSONObj& metadataObj) {
BSONElement ssmElem;
BSONElement auditElem;
BSONElement configSvrElem;
for (const auto& metadataElem : metadataObj) {
auto fieldName = metadataElem.fieldNameStringData();
if (fieldName == ServerSelectionMetadata::fieldName()) {
ssmElem = metadataElem;
} else if (fieldName == AuditMetadata::fieldName()) {
auditElem = metadataElem;
} else if (fieldName == ConfigServerMetadata::fieldName()) {
configSvrElem = metadataElem;
}
}
auto swServerSelectionMetadata = ServerSelectionMetadata::readFromMetadata(ssmElem);
if (!swServerSelectionMetadata.isOK()) {
return swServerSelectionMetadata.getStatus();
}
ServerSelectionMetadata::get(txn) = std::move(swServerSelectionMetadata.getValue());
auto swAuditMetadata = AuditMetadata::readFromMetadata(auditElem);
if (!swAuditMetadata.isOK()) {
return swAuditMetadata.getStatus();
}
AuditMetadata::get(txn) = std::move(swAuditMetadata.getValue());
auto configServerMetadata = ConfigServerMetadata::readFromMetadata(configSvrElem);
if (!configServerMetadata.isOK()) {
return configServerMetadata.getStatus();
}
ConfigServerMetadata::get(txn) = std::move(configServerMetadata.getValue());
return Status::OK();
}
Status writeRequestMetadata(OperationContext* txn, BSONObjBuilder* metadataBob) {
auto ssStatus = ServerSelectionMetadata::get(txn).writeToMetadata(metadataBob);
if (!ssStatus.isOK()) {
return ssStatus;
}
return Status::OK();
}
StatusWith<CommandAndMetadata> upconvertRequestMetadata(BSONObj legacyCmdObj, int queryFlags) {
// We can reuse the same metadata BOB for every upconvert call, but we need to keep
// making new command BOBs as each metadata bob will need to remove fields. We can not use
// mutablebson here because the ServerSelectionMetadata upconvert routine performs
// manipulations (replacing a root with its child) that mutablebson doesn't
// support.
BSONObjBuilder metadataBob;
// Ordering is important here - ServerSelectionMetadata must be upconverted
// first, then AuditMetadata.
BSONObjBuilder ssmCommandBob;
auto upconvertStatus =
ServerSelectionMetadata::upconvert(legacyCmdObj, queryFlags, &ssmCommandBob, &metadataBob);
if (!upconvertStatus.isOK()) {
return upconvertStatus;
}
BSONObjBuilder auditCommandBob;
upconvertStatus =
AuditMetadata::upconvert(ssmCommandBob.done(), queryFlags, &auditCommandBob, &metadataBob);
if (!upconvertStatus.isOK()) {
return upconvertStatus;
}
return std::make_tuple(auditCommandBob.obj(), metadataBob.obj());
}
StatusWith<LegacyCommandAndFlags> downconvertRequestMetadata(BSONObj cmdObj, BSONObj metadata) {
int legacyQueryFlags = 0;
BSONObjBuilder auditCommandBob;
// Ordering is important here - AuditingMetadata must be downconverted first,
// then ServerSelectionMetadata.
auto downconvertStatus =
AuditMetadata::downconvert(cmdObj, metadata, &auditCommandBob, &legacyQueryFlags);
if (!downconvertStatus.isOK()) {
return downconvertStatus;
}
BSONObjBuilder ssmCommandBob;
downconvertStatus = ServerSelectionMetadata::downconvert(
auditCommandBob.done(), metadata, &ssmCommandBob, &legacyQueryFlags);
if (!downconvertStatus.isOK()) {
return downconvertStatus;
}
return std::make_tuple(ssmCommandBob.obj(), std::move(legacyQueryFlags));
}
StatusWith<CommandReplyWithMetadata> upconvertReplyMetadata(const BSONObj& legacyReply) {
BSONObjBuilder commandReplyBob;
BSONObjBuilder metadataBob;
auto upconvertStatus = ShardingMetadata::upconvert(legacyReply, &commandReplyBob, &metadataBob);
if (!upconvertStatus.isOK()) {
return upconvertStatus;
}
return std::make_tuple(commandReplyBob.obj(), metadataBob.obj());
}
StatusWith<BSONObj> downconvertReplyMetadata(const BSONObj& commandReply,
const BSONObj& replyMetadata) {
BSONObjBuilder legacyCommandReplyBob;
auto downconvertStatus =
ShardingMetadata::downconvert(commandReply, replyMetadata, &legacyCommandReplyBob);
if (!downconvertStatus.isOK()) {
return downconvertStatus;
}
return legacyCommandReplyBob.obj();
}
} // namespace rpc
} // namespace mongo
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