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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_REFRESH_PARENT_REQUEST_H
#define CEPH_LIBRBD_IMAGE_REFRESH_PARENT_REQUEST_H
#include "include/int_types.h"
#include "librbd/Types.h"
class Context;
namespace librbd {
class ImageCtx;
namespace image {
template <typename ImageCtxT = ImageCtx>
class RefreshParentRequest {
public:
static RefreshParentRequest *create(ImageCtxT &child_image_ctx,
const ParentImageInfo &parent_md,
const MigrationInfo &migration_info,
Context *on_finish) {
return new RefreshParentRequest(child_image_ctx, parent_md, migration_info,
on_finish);
}
static bool is_refresh_required(ImageCtxT &child_image_ctx,
const ParentImageInfo &parent_md,
const MigrationInfo &migration_info);
void send();
void apply();
void finalize(Context *on_finish);
private:
/**
* @verbatim
*
* <start>
* |
* | (open required)
* |----------------> OPEN_PARENT * * * * * * * * * * * * * * *
* | | *
* | v (on error) *
* \----------------> <apply> *
* | *
* | (close required) *
* |-----------------> CLOSE_PARENT *
* | | *
* | v *
* | RESET_EXISTENCE *
* | | *
* | v *
* \-----------------> <finish> < * * * *
*
* @endverbatim
*/
RefreshParentRequest(ImageCtxT &child_image_ctx,
const ParentImageInfo &parent_md,
const MigrationInfo &migration_info, Context *on_finish);
ImageCtxT &m_child_image_ctx;
ParentImageInfo m_parent_md;
MigrationInfo m_migration_info;
Context *m_on_finish;
ImageCtxT *m_parent_image_ctx;
uint64_t m_parent_snap_id;
int m_error_result;
static bool is_close_required(ImageCtxT &child_image_ctx,
const ParentImageInfo &parent_md,
const MigrationInfo &migration_info);
static bool is_open_required(ImageCtxT &child_image_ctx,
const ParentImageInfo &parent_md,
const MigrationInfo &migration_info);
static bool does_parent_exist(ImageCtxT &child_image_ctx,
const ParentImageInfo &parent_md,
const MigrationInfo &migration_info);
void send_open_parent();
Context *handle_open_parent(int *result);
void send_close_parent();
Context *handle_close_parent(int *result);
void send_reset_existence_cache();
Context *handle_reset_existence_cache(int *result);
void send_complete(int r);
void save_result(int *result) {
if (m_error_result == 0 && *result < 0) {
m_error_result = *result;
}
}
};
} // namespace image
} // namespace librbd
extern template class librbd::image::RefreshParentRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_IMAGE_REFRESH_PARENT_REQUEST_H
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