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[stor4nfv.git] / src / ceph / src / librbd / operation / SnapshotProtectRequest.h

diff --git a/src/ceph/src/librbd/operation/SnapshotProtectRequest.h b/src/ceph/src/librbd/operation/SnapshotProtectRequest.h
new file mode 100644 (file)
index 0000000..bef8022
--- /dev/null
+++ b/src/ceph/src/librbd/operation/SnapshotProtectRequest.h
@@ -0,0 +1,68 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_OPERATION_SNAPSHOT_PROTECT_REQUEST_H
+#define CEPH_LIBRBD_OPERATION_SNAPSHOT_PROTECT_REQUEST_H
+
+#include "librbd/operation/Request.h"
+#include <string>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace operation {
+
+template <typename ImageCtxT = ImageCtx>
+class SnapshotProtectRequest : public Request<ImageCtxT> {
+public:
+  /**
+   * Snap Protect goes through the following state machine:
+   *
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * STATE_PROTECT_SNAP
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   *
+   */
+  enum State {
+    STATE_PROTECT_SNAP
+  };
+
+  SnapshotProtectRequest(ImageCtxT &image_ctx, Context *on_finish,
+                        const cls::rbd::SnapshotNamespace &snap_namespace,
+                        const std::string &snap_name);
+
+protected:
+  void send_op() override;
+  bool should_complete(int r) override;
+
+  journal::Event create_event(uint64_t op_tid) const override {
+    return journal::SnapProtectEvent(op_tid, m_snap_namespace, m_snap_name);
+  }
+
+private:
+  cls::rbd::SnapshotNamespace m_snap_namespace;
+  std::string m_snap_name;
+  State m_state;
+
+  void send_protect_snap();
+
+  int verify_and_send_protect_snap();
+};
+
+} // namespace operation
+} // namespace librbd
+
+extern template class librbd::operation::SnapshotProtectRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_PROTECT_REQUEST_H