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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_MIRROR_DEMOTE_REQUEST_H
#define CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H
#include "cls/rbd/cls_rbd_types.h"
#include "librbd/mirror/Types.h"
struct Context;
namespace librbd {
struct ImageCtx;
namespace mirror {
template <typename ImageCtxT = librbd::ImageCtx>
class DemoteRequest {
public:
static DemoteRequest *create(ImageCtxT &image_ctx, Context *on_finish) {
return new DemoteRequest(image_ctx, on_finish);
}
DemoteRequest(ImageCtxT &image_ctx, Context *on_finish)
: m_image_ctx(image_ctx), m_on_finish(on_finish) {
}
void send();
private:
/**
* @verbatim
*
* <start>
* |
* v
* GET_INFO
* |
* v
* ACQUIRE_LOCK * * * *
* | *
* v *
* DEMOTE *
* | *
* v *
* RELEASE_LOCK *
* | *
* v *
* <finish> < * * * * *
*
* @endverbatim
*/
ImageCtxT &m_image_ctx;
Context *m_on_finish;
int m_ret_val = 0;
bool m_blocked_requests = false;
cls::rbd::MirrorImage m_mirror_image;
PromotionState m_promotion_state = PROMOTION_STATE_PRIMARY;
std::string m_primary_mirror_uuid;
void get_info();
void handle_get_info(int r);
void acquire_lock();
void handle_acquire_lock(int r);
void demote();
void handle_demote(int r);
void release_lock();
void handle_release_lock(int r);
void finish(int r);
};
} // namespace mirror
} // namespace librbd
extern template class librbd::mirror::DemoteRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_MIRROR_DEMOTE_REQUEST_H
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