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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_RBD_MIRROR_IMAGE_DELETER_SNAPSHOT_PURGE_REQUEST_H
#define CEPH_RBD_MIRROR_IMAGE_DELETER_SNAPSHOT_PURGE_REQUEST_H
#include "include/rados/librados.hpp"
#include "cls/rbd/cls_rbd_types.h"
#include <string>
#include <vector>
class Context;
namespace librbd { struct ImageCtx; }
namespace rbd {
namespace mirror {
namespace image_deleter {
template <typename ImageCtxT = librbd::ImageCtx>
class SnapshotPurgeRequest {
public:
static SnapshotPurgeRequest* create(librados::IoCtx &io_ctx,
const std::string &image_id,
Context *on_finish) {
return new SnapshotPurgeRequest(io_ctx, image_id, on_finish);
}
SnapshotPurgeRequest(librados::IoCtx &io_ctx, const std::string &image_id,
Context *on_finish)
: m_io_ctx(io_ctx), m_image_id(image_id), m_on_finish(on_finish) {
}
void send();
private:
/*
* @verbatim
*
* <start>
* |
* v
* OPEN_IMAGE
* |
* v
* ACQUIRE_LOCK
* |
* | (repeat for each snapshot)
* |/------------------------\
* | |
* v (skip if not needed) |
* SNAP_UNPROTECT |
* | |
* v (skip if not needed) |
* SNAP_REMOVE -----------------/
* |
* v
* CLOSE_IMAGE
* |
* v
* <finish>
*
* @endverbatim
*/
librados::IoCtx &m_io_ctx;
std::string m_image_id;
Context *m_on_finish;
ImageCtxT *m_image_ctx = nullptr;
int m_ret_val = 0;
std::vector<librados::snap_t> m_snaps;
cls::rbd::SnapshotNamespace m_snap_namespace;
std::string m_snap_name;
void open_image();
void handle_open_image(int r);
void acquire_lock();
void handle_acquire_lock(int r);
void snap_unprotect();
void handle_snap_unprotect(int r);
void snap_remove();
void handle_snap_remove(int r);
void close_image();
void handle_close_image(int r);
void finish(int r);
Context *start_lock_op(int* r);
};
} // namespace image_deleter
} // namespace mirror
} // namespace rbd
extern template class rbd::mirror::image_deleter::SnapshotPurgeRequest<librbd::ImageCtx>;
#endif // CEPH_RBD_MIRROR_IMAGE_DELETER_SNAPSHOT_PURGE_REQUEST_H
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