initial code repo

[stor4nfv.git] / src / ceph / src / librbd / image / OpenRequest.h

diff --git a/src/ceph/src/librbd/image/OpenRequest.h b/src/ceph/src/librbd/image/OpenRequest.h
new file mode 100644 (file)
index 0000000..5dd0887
--- /dev/null
+++ b/src/ceph/src/librbd/image/OpenRequest.h
@@ -0,0 +1,139 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IMAGE_OPEN_REQUEST_H
+#define CEPH_LIBRBD_IMAGE_OPEN_REQUEST_H
+
+#include "include/buffer.h"
+#include <map>
+#include <string>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace image {
+
+template <typename ImageCtxT = ImageCtx>
+class OpenRequest {
+public:
+  static OpenRequest *create(ImageCtxT *image_ctx, bool skip_open_parent,
+                             Context *on_finish) {
+    return new OpenRequest(image_ctx, skip_open_parent, on_finish);
+  }
+
+  void send();
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    | (v1)
+   *    |-----> V1_DETECT_HEADER
+   *    |           |
+   *    |           \-------------------------------\
+   *    | (v2)                                      |
+   *    \-----> V2_DETECT_HEADER                    |
+   *                |                               |
+   *                v                               |
+   *            V2_GET_ID|NAME                      |
+   *                |                               |
+   *                v                               |
+   *            V2_GET_NAME_FROM_TRASH              |
+   *                |                               |
+   *                v                               |
+   *            V2_GET_IMMUTABLE_METADATA           |
+   *                |                               |
+   *                v                               |
+   *            V2_GET_STRIPE_UNIT_COUNT            |
+   *                |                               |
+   *                v                               |
+   *            V2_GET_CREATE_TIMESTAMP             |
+   *                |                               |
+   *                v                               |
+   *            V2_GET_DATA_POOL                    |
+   *                |                               |
+   *                v                               |
+   *      /---> V2_APPLY_METADATA -------------> REGISTER_WATCH (skip if
+   *      |         |                               |            read-only)
+   *      \---------/                               v
+   *                                             REFRESH
+   *                                                |
+   *                                                v
+   *                                             SET_SNAP (skip if no snap)
+   *                                                |
+   *                                                v
+   *                                             <finish>
+   *                                                ^
+   *     (on error)                                 |
+   *    * * * * * * > CLOSE ------------------------/
+   *
+   * @endverbatim
+   */
+
+  OpenRequest(ImageCtxT *image_ctx, bool skip_open_parent, Context *on_finish);
+
+  ImageCtxT *m_image_ctx;
+  bool m_skip_open_parent_image;
+  Context *m_on_finish;
+
+  bufferlist m_out_bl;
+  int m_error_result;
+
+  std::string m_last_metadata_key;
+  std::map<std::string, bufferlist> m_metadata;
+
+  void send_v1_detect_header();
+  Context *handle_v1_detect_header(int *result);
+
+  void send_v2_detect_header();
+  Context *handle_v2_detect_header(int *result);
+
+  void send_v2_get_id();
+  Context *handle_v2_get_id(int *result);
+
+  void send_v2_get_name();
+  Context *handle_v2_get_name(int *result);
+
+  void send_v2_get_name_from_trash();
+  Context *handle_v2_get_name_from_trash(int *result);
+
+  void send_v2_get_immutable_metadata();
+  Context *handle_v2_get_immutable_metadata(int *result);
+
+  void send_v2_get_stripe_unit_count();
+  Context *handle_v2_get_stripe_unit_count(int *result);
+
+  void send_v2_get_create_timestamp();
+  Context *handle_v2_get_create_timestamp(int *result);
+
+  void send_v2_get_data_pool();
+  Context *handle_v2_get_data_pool(int *result);
+
+  void send_v2_apply_metadata();
+  Context *handle_v2_apply_metadata(int *result);
+
+  void send_register_watch();
+  Context *handle_register_watch(int *result);
+
+  void send_refresh();
+  Context *handle_refresh(int *result);
+
+  Context *send_set_snap(int *result);
+  Context *handle_set_snap(int *result);
+
+  void send_close_image(int error_result);
+  Context *handle_close_image(int *result);
+
+};
+
+} // namespace image
+} // namespace librbd
+
+extern template class librbd::image::OpenRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IMAGE_OPEN_REQUEST_H