-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
-// vim: ts=8 sw=2 smarttab
-
-#ifndef CEPH_LIBRBD_OPERATION_SNAPSHOT_UNPROTECT_REQUEST_H
-#define CEPH_LIBRBD_OPERATION_SNAPSHOT_UNPROTECT_REQUEST_H
-
-#include "librbd/operation/Request.h"
-#include <string>
-
-class Context;
-
-namespace librbd {
-
-class ImageCtx;
-
-namespace operation {
-
-template <typename ImageCtxT = ImageCtx>
-class SnapshotUnprotectRequest : public Request<ImageCtxT> {
-public:
- /**
- * Snap Unprotect goes through the following state machine:
- *
- * @verbatim
- *
- * <start>
- * |
- * v
- * STATE_UNPROTECT_SNAP_START
- * |
- * v
- * STATE_SCAN_POOL_CHILDREN * * * * > STATE_UNPROTECT_SNAP_ROLLBACK
- * | |
- * v |
- * STATE_UNPROTECT_SNAP_FINISH |
- * | |
- * v |
- * <finish> <----------------------------/
- *
- * @endverbatim
- *
- * If the unprotect operation needs to abort, the error path is followed
- * to rollback the unprotect in-progress status on the image.
- */
- enum State {
- STATE_UNPROTECT_SNAP_START,
- STATE_SCAN_POOL_CHILDREN,
- STATE_UNPROTECT_SNAP_FINISH,
- STATE_UNPROTECT_SNAP_ROLLBACK
- };
-
- SnapshotUnprotectRequest(ImageCtxT &image_ctx, Context *on_finish,
- const cls::rbd::SnapshotNamespace &snap_namespace,
- const std::string &snap_name);
-
-protected:
- void send_op() override;
- bool should_complete(int r) override;
-
- int filter_return_code(int r) const override {
- if (m_ret_val < 0) {
- return m_ret_val;
- }
- return 0;
- }
-
- journal::Event create_event(uint64_t op_tid) const override {
- return journal::SnapUnprotectEvent(op_tid, m_snap_namespace, m_snap_name);
- }
-
-private:
- cls::rbd::SnapshotNamespace m_snap_namespace;
- std::string m_snap_name;
- State m_state;
-
- int m_ret_val;
- uint64_t m_snap_id;
-
- bool should_complete_error();
-
- void send_unprotect_snap_start();
- void send_scan_pool_children();
- void send_unprotect_snap_finish();
- void send_unprotect_snap_rollback();
-
- int verify_and_send_unprotect_snap_start();
-};
-
-} // namespace operation
-} // namespace librbd
-
-extern template class librbd::operation::SnapshotUnprotectRequest<librbd::ImageCtx>;
-
-#endif // CEPH_LIBRBD_OPERATION_SNAPSHOT_UNPROTECT_REQUEST_H