SERVER-66480 introduce joinMigration shard cmd to set a barrier on the Balancer initialisation

(cherry picked from commit 531dfe764bc0645f5e676feaf5687100c0a5e612)

2 files changed, 43 insertions, 0 deletions

diff --git a/src/mongo/s/SConscript b/src/mongo/s/SConscript
index ddcd048fe64..336e7a2ff98 100644
--- a/src/mongo/s/SConscript
+++ b/src/mongo/s/SConscript
@@ -202,6 +202,7 @@ env.Library(
         'request_types/flush_resharding_state_change.idl',
         'request_types/flush_routing_table_cache_updates.idl',
         'request_types/get_database_version.idl',
+        'request_types/shardsvr_join_migrations_request.idl',
         'request_types/merge_chunk_request.idl',
         'request_types/migration_secondary_throttle_options.cpp',
         'request_types/move_chunk_request.cpp',
diff --git a/src/mongo/s/request_types/shardsvr_join_migrations_request.idl b/src/mongo/s/request_types/shardsvr_join_migrations_request.idl
new file mode 100644
index 00000000000..e779dd5da84
--- /dev/null
+++ b/src/mongo/s/request_types/shardsvr_join_migrations_request.idl
@@ -0,0 +1,42 @@
+# Copyright (C) 2022-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.
+#
+
+global:
+    cpp_namespace: "mongo"
+
+imports:
+    - "mongo/idl/basic_types.idl"
+
+commands:
+    _shardsvrJoinMigrations:
+        command_name: _shardsvrJoinMigrations
+        cpp_name: ShardsvrJoinMigrations
+        description: "Command to synch the caller on the completion of any chunk migration activity performed by the shard (as either donor or recipient)"
+        namespace: ignored
+        api_version: ""
+        strict: false