+++ /dev/null
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#ifndef CEPH_LIBRBD_OPERATION_SNAPSHOT_ROLLBACK_REQUEST_H
-#define CEPH_LIBRBD_OPERATION_SNAPSHOT_ROLLBACK_REQUEST_H
-
-#include "librbd/operation/Request.h"
-#include "librbd/ImageCtx.h"
-#include "librbd/internal.h"
-#include "librbd/journal/Types.h"
-#include <string>
-
-class Context;
-
-namespace librbd {
-
-class ProgressContext;
-
-namespace operation {
-
-template <typename ImageCtxT = ImageCtx>
-class SnapshotRollbackRequest : public Request<ImageCtxT> {
-public:
- /**
- * Snap Rollback goes through the following state machine:
- *
- * @verbatim
- *
- * <start> ---------\
- * |
- * v
- * STATE_BLOCK_WRITES
- * |
- * v
- * STATE_RESIZE_IMAGE (skip if resize not
- * | required)
- * v
- * STATE_ROLLBACK_OBJECT_MAP (skip if object
- * | map disabled)
- * v
- * STATE_ROLLBACK_OBJECTS
- * |
- * v
- * STATE_REFRESH_OBJECT_MAP (skip if object
- * | map disabled)
- * v
- * STATE_INVALIDATE_CACHE (skip if cache
- * | disabled)
- * v
- * <finish>
- *
- * @endverbatim
- *
- * The _RESIZE_IMAGE state is skipped if the image doesn't need to be resized.
- * The _ROLLBACK_OBJECT_MAP state is skipped if the object map isn't enabled.
- * The _INVALIDATE_CACHE state is skipped if the cache isn't enabled.
- */
-
- SnapshotRollbackRequest(ImageCtxT &image_ctx, Context *on_finish,
- const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name,
- uint64_t snap_id,
- uint64_t snap_size, ProgressContext &prog_ctx);
- ~SnapshotRollbackRequest() override;
-
-protected:
- void send_op() override;
- bool should_complete(int r) override {
- return true;
- }
-
- journal::Event create_event(uint64_t op_tid) const override {
- return journal::SnapRollbackEvent(op_tid, m_snap_namespace, m_snap_name);
- }
-
-private:
- cls::rbd::SnapshotNamespace m_snap_namespace;
- std::string m_snap_name;
- uint64_t m_snap_id;
- uint64_t m_snap_size;
- ProgressContext &m_prog_ctx;
-
- NoOpProgressContext m_no_op_prog_ctx;
-
- bool m_blocking_writes = false;
- decltype(ImageCtxT::object_map) m_object_map;
-
- void send_block_writes();
- Context *handle_block_writes(int *result);
-
- void send_resize_image();
- Context *handle_resize_image(int *result);
-
- void send_rollback_object_map();
- Context *handle_rollback_object_map(int *result);
-
- void send_rollback_objects();
- Context *handle_rollback_objects(int *result);
-
- Context *send_refresh_object_map();
- Context *handle_refresh_object_map(int *result);
-
- Context *send_invalidate_cache();
- Context *handle_invalidate_cache(int *result);
-
- void apply();
-};
-
-} // namespace operation
-} // namespace librbd
-
-extern template class librbd::operation::SnapshotRollbackRequest<librbd::ImageCtx>;
-
-#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_ROLLBACK_REQUEST_H