1 files changed, 128 insertions, 0 deletions
diff --git a/src/librbd/operation/SnapshotRemoveRequest.h b/src/librbd/operation/SnapshotRemoveRequest.h
new file mode 100644
index 000000000..17638a529
--- /dev/null
+++ b/src/librbd/operation/SnapshotRemoveRequest.h
@@ -0,0 +1,128 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H
+#define CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H
+
+#include "librbd/operation/Request.h"
+#include "include/buffer.h"
+#include "librbd/Types.h"
+#include <string>
+
+class Context;
+
+namespace librbd {
+
+class ImageCtx;
+
+namespace operation {
+
+template <typename ImageCtxT = ImageCtx>
+class SnapshotRemoveRequest : public Request<ImageCtxT> {
+public:
+  /**
+   * @verbatim
+   *
+   * <start>
+   *    |
+   *    v
+   * TRASH_SNAP
+   *    |
+   *    v (skip if unsupported)
+   * GET_SNAP
+   *    |
+   *    v (skip if unnecessary)
+   * LIST_CHILDREN <-------------\
+   *    |                        |
+   *    v (skip if unnecessary)  | (repeat as needed)
+   * DETACH_STALE_CHILD ---------/
+   *    |
+   *    v (skip if unnecessary)
+   * DETACH_CHILD
+   *    |
+   *    v (skip if disabled/in-use)
+   * REMOVE_OBJECT_MAP
+   *    |
+   *    v (skip if not mirror snpashot)
+   * REMOVE_IMAGE_STATE
+   *    |
+   *    v (skip if in-use)
+   * RELEASE_SNAP_ID
+   *    |
+   *    v (skip if in-use)
+   * REMOVE_SNAP
+   *    |
+   *    v
+   * <finish>
+   *
+   * @endverbatim
+   */
+
+  static SnapshotRemoveRequest *create(
+      ImageCtxT &image_ctx, const cls::rbd::SnapshotNamespace &snap_namespace,
+      const std::string &snap_name, uint64_t snap_id, Context *on_finish) {
+    return new SnapshotRemoveRequest(image_ctx, on_finish, snap_namespace,
+                                     snap_name, snap_id);
+  }
+
+  SnapshotRemoveRequest(ImageCtxT &image_ctx, Context *on_finish,
+			const cls::rbd::SnapshotNamespace &snap_namespace,
+		        const std::string &snap_name,
+			uint64_t snap_id);
+
+protected:
+  void send_op() override;
+  bool should_complete(int r) override;
+
+  journal::Event create_event(uint64_t op_tid) const override {
+    return journal::SnapRemoveEvent(op_tid, m_snap_namespace, m_snap_name);
+  }
+
+private:
+  cls::rbd::SnapshotNamespace m_snap_namespace;
+  cls::rbd::ChildImageSpecs m_child_images;
+  std::string m_snap_name;
+  uint64_t m_snap_id;
+  bool m_trashed_snapshot = false;
+  bool m_child_attached = false;
+
+  ceph::bufferlist m_out_bl;
+
+  void trash_snap();
+  void handle_trash_snap(int r);
+
+  void get_snap();
+  void handle_get_snap(int r);
+
+  void list_children();
+  void handle_list_children(int r);
+
+  void detach_stale_child();
+  void handle_detach_stale_child(int r);
+
+  void detach_child();
+  void handle_detach_child(int r);
+
+  void remove_object_map();
+  void handle_remove_object_map(int r);
+
+  void remove_image_state();
+  void handle_remove_image_state(int r);
+
+  void release_snap_id();
+  void handle_release_snap_id(int r);
+
+  void remove_snap();
+  void handle_remove_snap(int r);
+
+  void remove_snap_context();
+  int scan_for_parents(cls::rbd::ParentImageSpec &pspec);
+
+};
+
+} // namespace operation
+} // namespace librbd
+
+extern template class librbd::operation::SnapshotRemoveRequest<librbd::ImageCtx>;
+
+#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_REMOVE_REQUEST_H