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/**
* Copyright (C) 2017 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/db/pipeline/document_source_current_op.h"
#include "mongo/db/pipeline/lite_parsed_document_source.h"
#include "mongo/db/server_options.h"
#include "mongo/util/net/sock.h"
namespace mongo {
namespace {
const StringData kAllUsersFieldName = "allUsers"_sd;
const StringData kIdleConnectionsFieldName = "idleConnections"_sd;
const StringData kOpIdFieldName = "opid"_sd;
const StringData kClientFieldName = "client"_sd;
const StringData kMongosClientFieldName = "client_s"_sd;
} // namespace
using boost::intrusive_ptr;
REGISTER_DOCUMENT_SOURCE(currentOp,
LiteParsedDocumentSourceDefault::parse,
DocumentSourceCurrentOp::createFromBson);
const char* DocumentSourceCurrentOp::getSourceName() const {
return "$currentOp";
}
DocumentSource::InitialSourceType DocumentSourceCurrentOp::getInitialSourceType() const {
return InitialSourceType::kCollectionlessInitialSource;
}
DocumentSource::GetNextResult DocumentSourceCurrentOp::getNext() {
if (_ops.empty()) {
_ops = _mongod->getCurrentOps(_includeIdleConnections, _includeOpsFromAllUsers);
_opsIter = _ops.begin();
if (pExpCtx->inShard) {
_shardName = _mongod->getShardName(pExpCtx->opCtx);
uassert(40465,
"Aggregation request specified 'fromRouter' but unable to retrieve shard name "
"for $currentOp pipeline stage.",
!_shardName.empty());
}
}
if (_opsIter != _ops.end()) {
if (!pExpCtx->inShard) {
return Document(*_opsIter++);
}
// This $currentOp is running in a sharded context.
invariant(!_shardName.empty());
const BSONObj& op = *_opsIter++;
MutableDocument doc;
// For operations on a shard, we change the opid from the raw numeric form to
// 'shardname:opid'. We also change the fieldname 'client' to 'client_s' to indicate
// that the IP is that of the mongos which initiated this request.
for (auto&& elt : op) {
StringData fieldName = elt.fieldNameStringData();
if (fieldName == kOpIdFieldName) {
uassert(ErrorCodes::TypeMismatch,
str::stream() << "expected numeric opid for $currentOp response from '"
<< _shardName
<< "' but got: "
<< typeName(elt.type()),
elt.isNumber());
std::string shardOpID = (str::stream() << _shardName << ":" << elt.numberInt());
doc.addField(kOpIdFieldName, Value(shardOpID));
} else if (fieldName == kClientFieldName) {
doc.addField(kMongosClientFieldName, Value(elt.str()));
} else {
doc.addField(fieldName, Value(elt));
}
}
return doc.freeze();
}
return GetNextResult::makeEOF();
}
intrusive_ptr<DocumentSource> DocumentSourceCurrentOp::createFromBson(
BSONElement spec, const intrusive_ptr<ExpressionContext>& pExpCtx) {
uassert(ErrorCodes::FailedToParse,
str::stream() << "$currentOp options must be specified in an object, but found: "
<< typeName(spec.type()),
spec.type() == BSONType::Object);
const NamespaceString& nss = pExpCtx->ns;
uassert(ErrorCodes::InvalidNamespace,
"$currentOp must be run against the 'admin' database with {aggregate: 1}",
nss.db() == NamespaceString::kAdminDb && nss.isCollectionlessAggregateNS());
ConnMode includeIdleConnections = ConnMode::kExcludeIdle;
UserMode includeOpsFromAllUsers = UserMode::kExcludeOthers;
for (auto&& elem : spec.embeddedObject()) {
const auto fieldName = elem.fieldNameStringData();
if (fieldName == kIdleConnectionsFieldName) {
uassert(ErrorCodes::FailedToParse,
str::stream() << "The 'idleConnections' parameter of the $currentOp stage must "
"be a boolean value, but found: "
<< typeName(elem.type()),
elem.type() == BSONType::Bool);
includeIdleConnections =
(elem.Bool() ? ConnMode::kIncludeIdle : ConnMode::kExcludeIdle);
} else if (fieldName == kAllUsersFieldName) {
uassert(ErrorCodes::FailedToParse,
str::stream() << "The 'allUsers' parameter of the $currentOp stage must be a "
"boolean value, but found: "
<< typeName(elem.type()),
elem.type() == BSONType::Bool);
includeOpsFromAllUsers =
(elem.Bool() ? UserMode::kIncludeAll : UserMode::kExcludeOthers);
} else {
uasserted(ErrorCodes::FailedToParse,
str::stream() << "Unrecognized option '" << fieldName
<< "' in $currentOp stage.");
}
}
return intrusive_ptr<DocumentSourceCurrentOp>(
new DocumentSourceCurrentOp(pExpCtx, includeIdleConnections, includeOpsFromAllUsers));
}
intrusive_ptr<DocumentSourceCurrentOp> DocumentSourceCurrentOp::create(
const boost::intrusive_ptr<ExpressionContext>& pExpCtx,
ConnMode includeIdleConnections,
UserMode includeOpsFromAllUsers) {
return intrusive_ptr<DocumentSourceCurrentOp>(
new DocumentSourceCurrentOp(pExpCtx, includeIdleConnections, includeOpsFromAllUsers));
}
Value DocumentSourceCurrentOp::serialize(boost::optional<ExplainOptions::Verbosity> explain) const {
return Value(Document{
{getSourceName(),
Document{{kIdleConnectionsFieldName, (_includeIdleConnections == ConnMode::kIncludeIdle)},
{kAllUsersFieldName, (_includeOpsFromAllUsers == UserMode::kIncludeAll)}}}});
}
} // namespace mongo
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