1 files changed, 31 insertions, 0 deletions
diff --git a/src/librbd/exclusive_lock/Policy.h b/src/librbd/exclusive_lock/Policy.h
new file mode 100644
index 000000000..7064a6515
--- /dev/null
+++ b/src/librbd/exclusive_lock/Policy.h
@@ -0,0 +1,31 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_EXCLUSIVE_LOCK_POLICY_H
+#define CEPH_LIBRBD_EXCLUSIVE_LOCK_POLICY_H
+
+namespace librbd {
+namespace exclusive_lock {
+
+enum OperationRequestType {
+  OPERATION_REQUEST_TYPE_GENERAL           = 0,
+  OPERATION_REQUEST_TYPE_TRASH_SNAP_REMOVE = 1,
+  OPERATION_REQUEST_TYPE_FORCE_PROMOTION   = 2,
+};
+
+struct Policy {
+  virtual ~Policy() {
+  }
+
+  virtual bool may_auto_request_lock() = 0;
+  virtual int lock_requested(bool force) = 0;
+
+  virtual bool accept_blocked_request(OperationRequestType) {
+    return false;
+  }
+};
+
+} // namespace exclusive_lock
+} // namespace librbd
+
+#endif // CEPH_LIBRBD_EXCLUSIVE_LOCK_POLICY_H