1 files changed, 53 insertions, 0 deletions
diff --git a/src/librbd/plugin/WriteLogImageCache.h b/src/librbd/plugin/WriteLogImageCache.h
new file mode 100644
index 000000000..2ceb87ec6
--- /dev/null
+++ b/src/librbd/plugin/WriteLogImageCache.h
@@ -0,0 +1,53 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_PLUGIN_WRITELOG_IMAGE_CACHE_H
+#define CEPH_LIBRBD_PLUGIN_WRITELOG_IMAGE_CACHE_H
+
+#include "librbd/plugin/Types.h"
+#include "include/Context.h"
+
+namespace librbd {
+
+struct ImageCtx;
+
+namespace plugin {
+
+template <typename ImageCtxT>
+class WriteLogImageCache : public Interface<ImageCtxT> {
+public:
+  WriteLogImageCache(CephContext* cct) : Interface<ImageCtxT>(cct) {
+  }
+
+  ~WriteLogImageCache() override;
+
+  void init(ImageCtxT* image_ctx, Api<ImageCtxT>& api,
+            cache::ImageWritebackInterface& image_writeback,
+            PluginHookPoints& hook_points_list,
+            Context* on_finish) override;
+
+  class HookPoints : public plugin::HookPoints {
+  public:
+    HookPoints(ImageCtxT* image_ctx,
+	       cache::ImageWritebackInterface& image_writeback,
+	       plugin::Api<ImageCtxT>& plugin_api);
+    ~HookPoints() override;
+
+    void acquired_exclusive_lock(Context* on_finish) override;
+    void prerelease_exclusive_lock(Context* on_finish) override;
+    void discard(Context* on_finish) override;
+
+  private:
+    ImageCtxT* m_image_ctx;
+    cache::ImageWritebackInterface& m_image_writeback;
+    plugin::Api<ImageCtxT>& m_plugin_api;
+  };
+
+};
+
+} // namespace plugin
+} // namespace librbd
+
+extern template class librbd::plugin::WriteLogImageCache<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_PLUGIN_WRITELOG_IMAGE_CACHE_H