initial code repo

[stor4nfv.git] / src / ceph / src / librbd / object_map / UpdateRequest.h

diff --git a/src/ceph/src/librbd/object_map/UpdateRequest.h b/src/ceph/src/librbd/object_map/UpdateRequest.h
new file mode 100644 (file)
index 0000000..cb9804d
--- /dev/null
+++ b/src/ceph/src/librbd/object_map/UpdateRequest.h
@@ -0,0 +1,96 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_OBJECT_MAP_UPDATE_REQUEST_H
+#define CEPH_LIBRBD_OBJECT_MAP_UPDATE_REQUEST_H
+
+#include "include/int_types.h"
+#include "librbd/object_map/Request.h"
+#include "common/bit_vector.hpp"
+#include "common/zipkin_trace.h"
+#include "librbd/Utils.h"
+#include <boost/optional.hpp>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace object_map {
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class UpdateRequest : public Request {
+public:
+  static UpdateRequest *create(ImageCtx &image_ctx,
+                               ceph::BitVector<2> *object_map,
+                               uint64_t snap_id, uint64_t start_object_no,
+                               uint64_t end_object_no, uint8_t new_state,
+                               const boost::optional<uint8_t> &current_state,
+                               const ZTracer::Trace &parent_trace,
+                               Context *on_finish) {
+    return new UpdateRequest(image_ctx, object_map, snap_id, start_object_no,
+                             end_object_no, new_state, current_state,
+                             parent_trace, on_finish);
+  }
+
+  UpdateRequest(ImageCtx &image_ctx, ceph::BitVector<2> *object_map,
+                uint64_t snap_id, uint64_t start_object_no,
+                uint64_t end_object_no, uint8_t new_state,
+                const boost::optional<uint8_t> &current_state,
+               const ZTracer::Trace &parent_trace, Context *on_finish)
+    : Request(image_ctx, snap_id, on_finish), m_object_map(*object_map),
+      m_start_object_no(start_object_no), m_end_object_no(end_object_no),
+      m_update_start_object_no(start_object_no), m_new_state(new_state),
+      m_current_state(current_state),
+      m_trace(util::create_trace(image_ctx, "update object map", parent_trace))
+  {
+    m_trace.event("start");
+  }
+  virtual ~UpdateRequest() {
+    m_trace.event("finish");
+  }
+
+  void send() override;
+
+protected:
+  void finish_request() override;
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    |/------------------\
+   *    v                   | (repeat in batches)
+   * UPDATE_OBJECT_MAP -----/
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   */
+
+  ceph::BitVector<2> &m_object_map;
+  uint64_t m_start_object_no;
+  uint64_t m_end_object_no;
+  uint64_t m_update_start_object_no;
+  uint64_t m_update_end_object_no = 0;
+  uint8_t m_new_state;
+  boost::optional<uint8_t> m_current_state;
+  ZTracer::Trace m_trace;
+
+  void update_object_map();
+  void handle_update_object_map(int r);
+
+  void update_in_memory_object_map();
+
+};
+
+} // namespace object_map
+} // namespace librbd
+
+extern template class librbd::object_map::UpdateRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_OBJECT_MAP_UPDATE_REQUEST_H