ceph/src/librbd/TrashWatcher.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #ifndef CEPH_LIBRBD_TRASH_WATCHER_H
   5 #define CEPH_LIBRBD_TRASH_WATCHER_H
   6
   7 #include "include/int_types.h"
   8 #include "include/rados/librados_fwd.hpp"
   9 #include "cls/rbd/cls_rbd_types.h"
  10 #include "librbd/ImageCtx.h"
  11 #include "librbd/Watcher.h"
  12 #include "librbd/trash_watcher/Types.h"
  13
  14 namespace librbd {
  15
  16 namespace asio { struct ContextWQ; }
  17 namespace watcher {
  18 namespace util {
  19 template <typename> struct HandlePayloadVisitor;
  20 } // namespace util
  21 } // namespace watcher
  22
  23 template <typename ImageCtxT = librbd::ImageCtx>
  24 class TrashWatcher : public Watcher {
  25   friend struct watcher::util::HandlePayloadVisitor<TrashWatcher<ImageCtxT>>;
  26 public:
  27   TrashWatcher(librados::IoCtx &io_ctx, asio::ContextWQ *work_queue);
  28
  29   static void notify_image_added(librados::IoCtx &io_ctx,
  30                                  const std::string& image_id,
  31                                  const cls::rbd::TrashImageSpec& spec,
  32                                  Context *on_finish);
  33   static void notify_image_removed(librados::IoCtx &io_ctx,
  34                                    const std::string& image_id,
  35                                    Context *on_finish);
  36
  37 protected:
  38   virtual void handle_image_added(const std::string &image_id,
  39                                   const cls::rbd::TrashImageSpec& spec) = 0;
  40   virtual void handle_image_removed(const std::string &image_id) = 0;
  41
  42 private:
  43   void handle_notify(uint64_t notify_id, uint64_t handle,
  44                      uint64_t notifier_id, bufferlist &bl) override;
  45
  46   bool handle_payload(const trash_watcher::ImageAddedPayload &payload,
  47                       Context *on_notify_ack);
  48   bool handle_payload(const trash_watcher::ImageRemovedPayload &payload,
  49                       Context *on_notify_ack);
  50   bool handle_payload(const trash_watcher::UnknownPayload &payload,
  51                       Context *on_notify_ack);
  52 };
  53
  54 } // namespace librbd
  55
  56 extern template class librbd::TrashWatcher<librbd::ImageCtx>;
  57
  58 #endif // CEPH_LIBRBD_TRASH_WATCHER_H