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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_IMAGE_PRE_REMOVE_REQUEST_H
#define CEPH_LIBRBD_IMAGE_PRE_REMOVE_REQUEST_H
#include "include/rados/librados.hpp"
#include "include/buffer.h"
#include "librbd/ImageCtx.h"
#include <list>
#include <map>
class Context;
namespace librbd {
namespace image {
template <typename ImageCtxT>
class PreRemoveRequest {
public:
static PreRemoveRequest *create(ImageCtxT *image_ctx, bool force,
Context *on_finish) {
return new PreRemoveRequest(image_ctx, force, on_finish);
}
PreRemoveRequest(ImageCtxT *image_ctx, bool force, Context *on_finish)
: m_image_ctx(image_ctx), m_force(force), m_on_finish(on_finish) {
}
void send();
private:
/**
* @verbatim
*
* <start>
* | (skip if
* v not needed) (error)
* ACQUIRE EXCLUSIVE LOCK * * * * * * > SHUT DOWN EXCLUSIVE LOCK
* | |
* v |
* CHECK IMAGE WATCHERS <------------------/
* |
* v
* CHECK GROUP
* |
* | /------\
* | | |
* v v |
* REMOVE SNAPS ----/
* |
* v
* <finish>
*
* @endverbatim
*/
ImageCtxT* m_image_ctx;
bool m_force;
Context* m_on_finish;
decltype(m_image_ctx->exclusive_lock) m_exclusive_lock = nullptr;
bufferlist m_out_bl;
std::list<obj_watch_t> m_watchers;
std::map<uint64_t, SnapInfo> m_snap_infos;
int m_ret_val = 0;
void acquire_exclusive_lock();
void handle_exclusive_lock(int r);
void shut_down_exclusive_lock();
void handle_shut_down_exclusive_lock(int r);
void validate_image_removal();
void check_image_snaps();
void list_image_watchers();
void handle_list_image_watchers(int r);
void check_image_watchers();
void check_group();
void handle_check_group(int r);
void remove_snapshot();
void handle_remove_snapshot(int r);
void finish(int r);
};
} // namespace image
} // namespace librbd
extern template class librbd::image::PreRemoveRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_IMAGE_PRE_REMOVE_REQUEST_H
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