SERVER-40580 add NonAuthTaskExecutor

Spin up a non-authing task executor for the service context for use in
local communication to mongodb wire protocol speaking services

4 files changed, 223 insertions, 0 deletions

diff --git a/src/mongo/executor/SConscript b/src/mongo/executor/SConscript
index 364ff4772a4..2da4b4e18a6 100644
--- a/src/mongo/executor/SConscript
+++ b/src/mongo/executor/SConscript
@@ -300,3 +300,30 @@ env.CppUnitTest(
         'thread_pool_task_executor_test_fixture',
     ],
 )
+
+env.Library(
+    target='non_auth_task_executor',
+    source=[
+        'non_auth_task_executor.cpp',
+    ],
+    LIBDEPS=[
+        'task_executor_interface',
+        '$BUILD_DIR/mongo/executor/network_interface_factory',
+        '$BUILD_DIR/mongo/executor/network_interface_thread_pool',
+        '$BUILD_DIR/mongo/executor/thread_pool_task_executor',
+        '$BUILD_DIR/mongo/util/concurrency/thread_pool',
+    ],
+)
+
+env.CppIntegrationTest(
+    target='non_auth_task_executor_integration_test',
+    source=[
+        'non_auth_task_executor_integration_test.cpp',
+    ],
+    LIBDEPS=[
+        'non_auth_task_executor',
+        '$BUILD_DIR/mongo/db/wire_version',
+        '$BUILD_DIR/mongo/transport/transport_layer_egress_init',
+        '$BUILD_DIR/mongo/util/version_impl',
+    ],
+)
diff --git a/src/mongo/executor/non_auth_task_executor.cpp b/src/mongo/executor/non_auth_task_executor.cpp
new file mode 100644
index 00000000000..60471994a8d
--- /dev/null
+++ b/src/mongo/executor/non_auth_task_executor.cpp
@@ -0,0 +1,75 @@
+/**
+ *    Copyright (C) 2019-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::kExecutor
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/executor/non_auth_task_executor.h"
+
+#include "mongo/executor/network_interface_factory.h"
+#include "mongo/executor/network_interface_thread_pool.h"
+#include "mongo/executor/thread_pool_task_executor.h"
+
+namespace mongo {
+namespace executor {
+
+namespace {
+
+const auto getExecutor = ServiceContext::declareDecoration<std::unique_ptr<TaskExecutor>>();
+
+ServiceContext::ConstructorActionRegisterer nonAuthExecutorCAR{
+    "NonAuthTaskExecutor",
+    [](ServiceContext* service) {
+        std::shared_ptr<NetworkInterface> ni =
+            makeNetworkInterface("NonAuthExecutor", nullptr, nullptr, [] {
+                ConnectionPool::Options options;
+                options.skipAuthentication = true;
+                return options;
+            }());
+        auto tp = std::make_unique<NetworkInterfaceThreadPool>(ni.get());
+        auto exec = std::make_unique<ThreadPoolTaskExecutor>(std::move(tp), std::move(ni));
+
+        exec->startup();
+
+        getExecutor(service) = std::move(exec);
+    },
+    [](ServiceContext* service) {
+        // Destruction implicitly performs the needed shutdown and join()
+        getExecutor(service).reset();
+    }};
+
+}  // namespace
+
+TaskExecutor* getNonAuthTaskExecutor(ServiceContext* svc) {
+    return getExecutor(svc).get();
+}
+
+}  // namespace executor
+}  // namespace mongo
diff --git a/src/mongo/executor/non_auth_task_executor.h b/src/mongo/executor/non_auth_task_executor.h
new file mode 100644
index 00000000000..30329dd6740
--- /dev/null
+++ b/src/mongo/executor/non_auth_task_executor.h
@@ -0,0 +1,50 @@
+/**
+ *    Copyright (C) 2019-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.
+ */
+
+#pragma once
+
+#include "mongo/executor/task_executor.h"
+
+namespace mongo {
+
+class ServiceContext;
+
+namespace executor {
+
+/**
+ * Provides access to a service context scoped task executor which does not perform authentication
+ * in its connection pool.
+ *
+ * This executor has a bounded thread pool and otherwise unspecified hooks.  It should only be used
+ * for internal communication to local mongodb protocol speaking services.
+ */
+TaskExecutor* getNonAuthTaskExecutor(ServiceContext* svc);
+
+}  // namespace executor
+}  // namespace mongo
diff --git a/src/mongo/executor/non_auth_task_executor_integration_test.cpp b/src/mongo/executor/non_auth_task_executor_integration_test.cpp
new file mode 100644
index 00000000000..b1d29190a04
--- /dev/null
+++ b/src/mongo/executor/non_auth_task_executor_integration_test.cpp
@@ -0,0 +1,71 @@
+/**
+ *    Copyright (C) 2019-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/executor/non_auth_task_executor.h"
+
+#include "mongo/db/service_context.h"
+#include "mongo/unittest/integration_test.h"
+#include "mongo/unittest/unittest.h"
+#include "mongo/util/future.h"
+
+namespace mongo {
+namespace executor {
+namespace {
+
+// Basic test that the non auth task executor is actually set up and works
+TEST(NonAuthTaskExecutor, Basic) {
+    ServiceContext::UniqueServiceContext svc = ServiceContext::make();
+    auto exec = getNonAuthTaskExecutor(svc.get());
+
+    RemoteCommandRequest rcr(unittest::getFixtureConnectionString().getServers().front(),
+                             "admin",
+                             BSON("isMaster" << 1),
+                             BSONObj(),
+                             nullptr);
+
+    auto pf = makePromiseFuture<void>();
+
+    ASSERT(exec->scheduleRemoteCommand(std::move(rcr),
+                                       [&](const TaskExecutor::RemoteCommandCallbackArgs& args) {
+                                           if (args.response.isOK()) {
+                                               pf.promise.emplaceValue();
+                                           } else {
+                                               pf.promise.setError(args.response.status);
+                                           }
+                                       })
+               .isOK());
+
+    ASSERT_OK(pf.future.getNoThrow());
+}
+
+}  // namespace
+}  // namespace executor
+}  // namespace mongo