1 files changed, 82 insertions, 0 deletions
diff --git a/src/librbd/image/ListWatchersRequest.h b/src/librbd/image/ListWatchersRequest.h
new file mode 100644
index 000000000..2c77254a7
--- /dev/null
+++ b/src/librbd/image/ListWatchersRequest.h
@@ -0,0 +1,82 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_IMAGE_LIST_WATCHERS_REQUEST_H
+#define CEPH_LIBRBD_IMAGE_LIST_WATCHERS_REQUEST_H
+
+#include "include/rados/rados_types.hpp"
+
+#include <list>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace image {
+
+enum {
+  LIST_WATCHERS_FILTER_OUT_MY_INSTANCE = 1 << 0,
+  LIST_WATCHERS_FILTER_OUT_MIRROR_INSTANCES = 1 << 1,
+  LIST_WATCHERS_MIRROR_INSTANCES_ONLY = 1 << 3,
+};
+
+template<typename ImageCtxT = ImageCtx>
+class ListWatchersRequest {
+public:
+  static ListWatchersRequest *create(ImageCtxT &image_ctx, int flags,
+                                     std::list<obj_watch_t> *watchers,
+                                     Context *on_finish) {
+    return new ListWatchersRequest(image_ctx, flags, watchers, on_finish);
+  }
+
+  void send();
+
+private:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * LIST_IMAGE_WATCHERS
+   *    |
+   *    v
+   * LIST_MIRROR_WATCHERS (skip if not needed)
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   */
+
+  ListWatchersRequest(ImageCtxT &image_ctx, int flags, std::list<obj_watch_t> *watchers,
+                      Context *on_finish);
+
+  ImageCtxT& m_image_ctx;
+  int m_flags;
+  std::list<obj_watch_t> *m_watchers;
+  Context *m_on_finish;
+
+  CephContext *m_cct;
+  int m_ret_val;
+  bufferlist m_out_bl;
+  std::list<obj_watch_t> m_object_watchers;
+  std::list<obj_watch_t> m_mirror_watchers;
+
+  void list_image_watchers();
+  void handle_list_image_watchers(int r);
+
+  void list_mirror_watchers();
+  void handle_list_mirror_watchers(int r);
+
+  void finish(int r);
+};
+
+} // namespace image
+} // namespace librbd
+
+extern template class librbd::image::ListWatchersRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_IMAGE_LIST_WATCHERS_REQUEST_H