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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_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
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