--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2020 Red Hat, Inc
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ */
+
+#pragma once
+
+#include <string>
+#include <boost/container/flat_map.hpp>
+#include "include/rados.h" // CEPH_OSD_CMPXATTR_*
+#include "include/encoding.h"
+
+namespace cls::cmpomap {
+
+/// comparison operand type
+enum class Mode : uint8_t {
+ String = CEPH_OSD_CMPXATTR_MODE_STRING,
+ U64 = CEPH_OSD_CMPXATTR_MODE_U64,
+};
+
+/// comparison operation, where the left-hand operand is the input value and
+/// the right-hand operand is the stored value (or the optional default)
+enum class Op : uint8_t {
+ EQ = CEPH_OSD_CMPXATTR_OP_EQ,
+ NE = CEPH_OSD_CMPXATTR_OP_NE,
+ GT = CEPH_OSD_CMPXATTR_OP_GT,
+ GTE = CEPH_OSD_CMPXATTR_OP_GTE,
+ LT = CEPH_OSD_CMPXATTR_OP_LT,
+ LTE = CEPH_OSD_CMPXATTR_OP_LTE,
+};
+
+/// mapping of omap keys to value comparisons
+using ComparisonMap = boost::container::flat_map<std::string, ceph::bufferlist>;
+
+} // namespace cls::cmpomap