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diff --git a/src/tools/rbd_mirror/image_deleter/SnapshotPurgeRequest.h b/src/tools/rbd_mirror/image_deleter/SnapshotPurgeRequest.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_RBD_MIRROR_IMAGE_DELETER_SNAPSHOT_PURGE_REQUEST_H
+#define CEPH_RBD_MIRROR_IMAGE_DELETER_SNAPSHOT_PURGE_REQUEST_H
+
+#include "include/rados/librados.hpp"
+#include "cls/rbd/cls_rbd_types.h"
+#include <string>
+#include <vector>
+
+class Context;
+namespace librbd { struct ImageCtx; }
+
+namespace rbd {
+namespace mirror {
+namespace image_deleter {
+
+template <typename ImageCtxT = librbd::ImageCtx>
+class SnapshotPurgeRequest {
+public:
+ static SnapshotPurgeRequest* create(librados::IoCtx &io_ctx,
+ const std::string &image_id,
+ Context *on_finish) {
+ return new SnapshotPurgeRequest(io_ctx, image_id, on_finish);
+ }
+
+ SnapshotPurgeRequest(librados::IoCtx &io_ctx, const std::string &image_id,
+ Context *on_finish)
+ : m_io_ctx(io_ctx), m_image_id(image_id), m_on_finish(on_finish) {
+ }
+
+ void send();
+
+private:
+ /*
+ * @verbatim
+ *
+ * <start>
+ * |
+ * v
+ * OPEN_IMAGE
+ * |
+ * v
+ * ACQUIRE_LOCK
+ * |
+ * | (repeat for each snapshot)
+ * |/------------------------\
+ * | |
+ * v (skip if not needed) |
+ * SNAP_UNPROTECT |
+ * | |
+ * v (skip if not needed) |
+ * SNAP_REMOVE -----------------/
+ * |
+ * v
+ * CLOSE_IMAGE
+ * |
+ * v
+ * <finish>
+ *
+ * @endverbatim
+ */
+
+ librados::IoCtx &m_io_ctx;
+ std::string m_image_id;
+ Context *m_on_finish;
+
+ ImageCtxT *m_image_ctx = nullptr;
+ int m_ret_val = 0;
+
+ std::vector<librados::snap_t> m_snaps;
+ cls::rbd::SnapshotNamespace m_snap_namespace;
+ std::string m_snap_name;
+
+ void open_image();
+ void handle_open_image(int r);
+
+ void acquire_lock();
+ void handle_acquire_lock(int r);
+
+ void start_snap_unprotect();
+ void snap_unprotect();
+ void handle_snap_unprotect(int r);
+
+ void snap_remove();
+ void handle_snap_remove(int r);
+
+ void close_image();
+ void handle_close_image(int r);
+
+ void finish(int r);
+
+ Context *start_lock_op(int* r);
+
+};
+
+} // namespace image_deleter
+} // namespace mirror
+} // namespace rbd
+
+extern template class rbd::mirror::image_deleter::SnapshotPurgeRequest<librbd::ImageCtx>;
+
+#endif // CEPH_RBD_MIRROR_IMAGE_DELETER_SNAPSHOT_PURGE_REQUEST_H
+