SERVER-31289 Add test only $listLocalCursors

In order to make the kill sessions test a bit more reliable, adding a
test only agg stage that returns minimal info about cursors.  That way
we can see if we killed our specific cursors, rather than looking at
global counts.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/mongo/db/generic_cursor.idl b/src/mongo/db/generic_cursor.idl
new file mode 100644
index 00000000000..f1359c8f2b8
--- /dev/null
+++ b/src/mongo/db/generic_cursor.idl
@@ -0,0 +1,35 @@
+# 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/>.
+#
+
+# This IDL file describes the BSON format for a GenericCursor, and
+# handles the serialization to and deserialization from its BSON representation
+# for that class.
+
+global:
+  cpp_namespace: "mongo"
+
+imports:
+  - "mongo/db/logical_session_id.idl"
+  - "mongo/idl/basic_types.idl"
+
+structs:
+  GenericCursor:
+    description: "A struct representing a cursor in either mongod or mongos"
+    fields:
+      id: long
+      ns: namespacestring
+      lsid:
+        type: LogicalSessionId
+        optional: true