1 files changed, 83 insertions, 0 deletions
diff --git a/src/librbd/image/GetMetadataRequest.h b/src/librbd/image/GetMetadataRequest.h
new file mode 100644
index 000000000..08fc2de71
--- /dev/null
+++ b/src/librbd/image/GetMetadataRequest.h
@@ -0,0 +1,83 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IMAGE_GET_METADATA_REQUEST_H
+#define CEPH_LIBRBD_IMAGE_GET_METADATA_REQUEST_H
+
+#include "include/common_fwd.h"
+#include "include/rados/librados.hpp"
+#include "include/rbd/librbd.hpp"
+#include <string>
+#include <map>
+
+class Context;
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace image {
+
+template <typename ImageCtxT = ImageCtx>
+class GetMetadataRequest {
+public:
+  typedef std::map<std::string, bufferlist> KeyValues;
+
+  static GetMetadataRequest* create(
+      IoCtx &io_ctx, const std::string &oid, bool filter_internal,
+      const std::string& filter_key_prefix, const std::string& last_key,
+      uint32_t max_results, KeyValues* key_values, Context *on_finish) {
+    return new GetMetadataRequest(io_ctx, oid, filter_internal,
+                                  filter_key_prefix, last_key, max_results,
+                                  key_values, on_finish);
+  }
+
+  GetMetadataRequest(
+      IoCtx &io_ctx, const std::string &oid, bool filter_internal,
+      const std::string& filter_key_prefix, const std::string& last_key,
+      uint32_t max_results, KeyValues* key_values, Context *on_finish);
+
+  void send();
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    |     /-------\
+   *    |     |       |
+   *    v     v       |
+   * METADATA_LIST ---/
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   */
+  librados::IoCtx m_io_ctx;
+  std::string m_oid;
+  bool m_filter_internal;
+  std::string m_filter_key_prefix;
+  std::string m_last_key;
+  uint32_t m_max_results;
+  KeyValues* m_key_values;
+  Context* m_on_finish;
+
+  CephContext* m_cct;
+  bufferlist m_out_bl;
+  uint32_t m_expected_results = 0;
+
+  void metadata_list();
+  void handle_metadata_list(int r);
+
+  void finish(int r);
+
+};
+
+} //namespace image
+} //namespace librbd
+
+extern template class librbd::image::GetMetadataRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IMAGE_GET_METADATA_REQUEST_H