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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_EXCLUSIVE_LOCK_PRE_RELEASE_REQUEST_H
#define CEPH_LIBRBD_EXCLUSIVE_LOCK_PRE_RELEASE_REQUEST_H
#include "librbd/ImageCtx.h"
#include <string>
class AsyncOpTracker;
class Context;
namespace librbd {
struct ImageCtx;
namespace exclusive_lock {
template <typename ImageCtxT = ImageCtx>
class PreReleaseRequest {
public:
static PreReleaseRequest* create(ImageCtxT &image_ctx, bool shutting_down,
AsyncOpTracker &async_op_tracker,
Context *on_finish);
~PreReleaseRequest();
void send();
private:
/**
* @verbatim
*
* <start>
* |
* v
* PREPARE_LOCK
* |
* v
* CANCEL_OP_REQUESTS
* |
* v
* BLOCK_WRITES
* |
* v
* WAIT_FOR_OPS
* |
* v
* INVALIDATE_CACHE
* |
* v
* FLUSH_NOTIFIES . . . . . . . . . . . . . .
* | .
* v .
* CLOSE_JOURNAL .
* | (journal disabled, .
* v object map enabled) .
* CLOSE_OBJECT_MAP < . . . . . . . . . . . .
* | .
* v (object map disabled) .
* <finish> < . . . . . . . . . . . . . . . . .
*
* @endverbatim
*/
PreReleaseRequest(ImageCtxT &image_ctx, bool shutting_down,
AsyncOpTracker &async_op_tracker, Context *on_finish);
ImageCtxT &m_image_ctx;
bool m_shutting_down;
AsyncOpTracker &m_async_op_tracker;
Context *m_on_finish;
int m_error_result = 0;
decltype(m_image_ctx.object_map) m_object_map = nullptr;
decltype(m_image_ctx.journal) m_journal = nullptr;
void send_prepare_lock();
void handle_prepare_lock(int r);
void send_cancel_op_requests();
void handle_cancel_op_requests(int r);
void send_block_writes();
void handle_block_writes(int r);
void send_wait_for_ops();
void handle_wait_for_ops(int r);
void send_invalidate_cache();
void handle_invalidate_cache(int r);
void send_flush_notifies();
void handle_flush_notifies(int r);
void send_close_journal();
void handle_close_journal(int r);
void send_close_object_map();
void handle_close_object_map(int r);
void send_unlock();
void finish();
void save_result(int result) {
if (m_error_result == 0 && result < 0) {
m_error_result = result;
}
}
};
} // namespace exclusive_lock
} // namespace librbd
#endif // CEPH_LIBRBD_EXCLUSIVE_LOCK_PRE_RELEASE_REQUEST_H
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