1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #ifndef CEPH_LIBRBD_OPERATION_SNAPSHOT_ROLLBACK_REQUEST_H
5 #define CEPH_LIBRBD_OPERATION_SNAPSHOT_ROLLBACK_REQUEST_H
7 #include "librbd/operation/Request.h"
8 #include "librbd/ImageCtx.h"
9 #include "librbd/internal.h"
10 #include "librbd/journal/Types.h"
17 class ProgressContext;
21 template <typename ImageCtxT = ImageCtx>
22 class SnapshotRollbackRequest : public Request<ImageCtxT> {
25 * Snap Rollback goes through the following state machine:
35 * STATE_RESIZE_IMAGE (skip if resize not
38 * STATE_ROLLBACK_OBJECT_MAP (skip if object
41 * STATE_ROLLBACK_OBJECTS
44 * STATE_REFRESH_OBJECT_MAP (skip if object
47 * STATE_INVALIDATE_CACHE (skip if cache
54 * The _RESIZE_IMAGE state is skipped if the image doesn't need to be resized.
55 * The _ROLLBACK_OBJECT_MAP state is skipped if the object map isn't enabled.
56 * The _INVALIDATE_CACHE state is skipped if the cache isn't enabled.
59 SnapshotRollbackRequest(ImageCtxT &image_ctx, Context *on_finish,
60 const cls::rbd::SnapshotNamespace &snap_namespace,
61 const std::string &snap_name,
63 uint64_t snap_size, ProgressContext &prog_ctx);
64 ~SnapshotRollbackRequest() override;
67 void send_op() override;
68 bool should_complete(int r) override {
72 journal::Event create_event(uint64_t op_tid) const override {
73 return journal::SnapRollbackEvent(op_tid, m_snap_namespace, m_snap_name);
77 cls::rbd::SnapshotNamespace m_snap_namespace;
78 std::string m_snap_name;
81 ProgressContext &m_prog_ctx;
83 NoOpProgressContext m_no_op_prog_ctx;
85 bool m_blocking_writes = false;
86 decltype(ImageCtxT::object_map) m_object_map;
88 void send_block_writes();
89 Context *handle_block_writes(int *result);
91 void send_resize_image();
92 Context *handle_resize_image(int *result);
94 void send_rollback_object_map();
95 Context *handle_rollback_object_map(int *result);
97 void send_rollback_objects();
98 Context *handle_rollback_objects(int *result);
100 Context *send_refresh_object_map();
101 Context *handle_refresh_object_map(int *result);
103 Context *send_invalidate_cache();
104 Context *handle_invalidate_cache(int *result);
109 } // namespace operation
110 } // namespace librbd
112 extern template class librbd::operation::SnapshotRollbackRequest<librbd::ImageCtx>;
114 #endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_ROLLBACK_REQUEST_H