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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_CLOSE_REQUEST_H
#define CEPH_LIBRBD_IMAGE_CLOSE_REQUEST_H
#include "librbd/ImageCtx.h"
class Context;
namespace librbd {
class ImageCtx;
namespace image {
template <typename ImageCtxT = ImageCtx>
class CloseRequest {
public:
static CloseRequest *create(ImageCtxT *image_ctx, Context *on_finish) {
return new CloseRequest(image_ctx, on_finish);
}
void send();
private:
/**
* @verbatim
*
* <start>
* |
* v
* BLOCK_IMAGE_WATCHER (skip if R/O)
* |
* v
* SHUT_DOWN_UPDATE_WATCHERS
* |
* v
* SHUT_DOWN_AIO_WORK_QUEUE . . .
* | . (exclusive lock disabled)
* v v
* SHUT_DOWN_EXCLUSIVE_LOCK FLUSH
* | .
* | . . . . . . . . . . .
* | .
* v v
* UNREGISTER_IMAGE_WATCHER (skip if R/O)
* |
* v
* FLUSH_READAHEAD
* |
* v
* SHUT_DOWN_OBJECT_DISPATCHER
* |
* v
* FLUSH_OP_WORK_QUEUE
* |
* v (skip if no parent)
* CLOSE_PARENT
* |
* v
* FLUSH_IMAGE_WATCHER
* |
* v
* <finish>
*
* @endverbatim
*/
CloseRequest(ImageCtxT *image_ctx, Context *on_finish);
ImageCtxT *m_image_ctx;
Context *m_on_finish;
int m_error_result;
decltype(m_image_ctx->exclusive_lock) m_exclusive_lock;
void send_block_image_watcher();
void handle_block_image_watcher(int r);
void send_shut_down_update_watchers();
void handle_shut_down_update_watchers(int r);
void send_shut_down_io_queue();
void handle_shut_down_io_queue(int r);
void send_shut_down_exclusive_lock();
void handle_shut_down_exclusive_lock(int r);
void send_flush();
void handle_flush(int r);
void send_unregister_image_watcher();
void handle_unregister_image_watcher(int r);
void send_flush_readahead();
void handle_flush_readahead(int r);
void send_shut_down_object_dispatcher();
void handle_shut_down_object_dispatcher(int r);
void send_flush_op_work_queue();
void handle_flush_op_work_queue(int r);
void send_close_parent();
void handle_close_parent(int r);
void send_flush_image_watcher();
void handle_flush_image_watcher(int r);
void finish();
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::CloseRequest<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_IMAGE_CLOSE_REQUEST_H
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