1 files changed, 63 insertions, 0 deletions
diff --git a/src/mongo/db/s/add_shard_util.h b/src/mongo/db/s/add_shard_util.h
new file mode 100644
index 00000000000..9a525e44a58
--- /dev/null
+++ b/src/mongo/db/s/add_shard_util.h
@@ -0,0 +1,63 @@
+/**
+ * Copyright (C) 2018 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.
+ */
+
+#pragma once
+
+#include <string>
+
+#include "mongo/base/string_data.h"
+
+namespace mongo {
+class AddShard;
+class BSONObj;
+class OperationContext;
+class ShardId;
+
+// Contains a collection of utility functions relating to the addShard command
+namespace add_shard_util {
+
+/*
+ * The _id value for shard identity documents
+ */
+constexpr StringData kShardIdentityDocumentId = "shardIdentity"_sd;
+
+/**
+ * Creates an AddShard command object that's sent from the config server to
+ * a mongod to instruct it to initialize itself as a shard in the cluster.
+ */
+AddShard createAddShardCmd(OperationContext* opCtx, const ShardId& shardName);
+
+/**
+ * Returns a BSON representation of an update request that can be used to insert a shardIdentity
+ * doc into the shard with the given shardName (or update the shard's existing shardIdentity
+ * doc's configsvrConnString if the _id, shardName, and clusterId do not conflict).
+ */
+BSONObj createShardIdentityUpsertForAddShard(const AddShard& addShardCmd);
+
+}  // namespace mongo
+}  // namespace add_shard_util