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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_MIRROR_STATUS_UPDATER_H
#define CEPH_RBD_MIRROR_MIRROR_STATUS_UPDATER_H
#include "include/rados/librados.hpp"
#include "common/ceph_mutex.h"
#include "cls/rbd/cls_rbd_types.h"
#include <list>
#include <map>
#include <set>
#include <string>
struct Context;
namespace librbd { class ImageCtx; }
namespace rbd {
namespace mirror {
template <typename> struct MirrorStatusWatcher;
template <typename> struct Threads;
template <typename ImageCtxT = librbd::ImageCtx>
class MirrorStatusUpdater {
public:
static MirrorStatusUpdater* create(librados::IoCtx& io_ctx,
Threads<ImageCtxT> *threads,
const std::string& local_mirror_uuid) {
return new MirrorStatusUpdater(io_ctx, threads, local_mirror_uuid);
}
MirrorStatusUpdater(librados::IoCtx& io_ctx, Threads<ImageCtxT> *threads,
const std::string& local_mirror_uuid);
~MirrorStatusUpdater();
void init(Context* on_finish);
void shut_down(Context* on_finish);
bool exists(const std::string& global_image_id);
void set_mirror_image_status(
const std::string& global_image_id,
const cls::rbd::MirrorImageSiteStatus& mirror_image_site_status,
bool immediate_update);
void remove_mirror_image_status(const std::string& global_image_id,
bool immediate_update, Context* on_finish);
void remove_refresh_mirror_image_status(const std::string& global_image_id,
Context* on_finish);
private:
/**
* @verbatim
*
* <uninitialized> <----------------------\
* | (init) ^ (error) |
* v * |
* INIT_STATUS_WATCHER * * * * * |
* | |
* | SHUT_DOWN_STATUS_WATCHER
* | ^
* | |
* | (shutdown) |
* <initialized> -------------------------/
*
* @endverbatim
*/
typedef std::list<Context*> Contexts;
typedef std::set<std::string> GlobalImageIds;
typedef std::map<std::string, cls::rbd::MirrorImageSiteStatus>
GlobalImageStatus;
librados::IoCtx m_io_ctx;
Threads<ImageCtxT>* m_threads;
std::string m_local_mirror_uuid;
Context* m_timer_task = nullptr;
ceph::mutex m_lock;
bool m_initialized = false;
MirrorStatusWatcher<ImageCtxT>* m_mirror_status_watcher = nullptr;
GlobalImageIds m_update_global_image_ids;
GlobalImageStatus m_global_image_status;
bool m_update_in_progress = false;
bool m_update_in_flight = false;
bool m_update_requested = false;
Contexts m_update_on_finish_ctxs;
GlobalImageIds m_updating_global_image_ids;
bool try_remove_mirror_image_status(const std::string& global_image_id,
bool queue_update, bool immediate_update,
Context* on_finish);
void init_mirror_status_watcher(Context* on_finish);
void handle_init_mirror_status_watcher(int r, Context* on_finish);
void shut_down_mirror_status_watcher(Context* on_finish);
void handle_shut_down_mirror_status_watcher(int r, Context* on_finish);
void finalize_shutdown(int r, Context* on_finish);
void schedule_timer_task();
void handle_timer_task(int r);
void queue_update_task(std::unique_lock<ceph::mutex>&& locker);
void update_task(int r);
void handle_update_task(int r);
};
} // namespace mirror
} // namespace rbd
extern template class rbd::mirror::MirrorStatusUpdater<librbd::ImageCtx>;
#endif // CEPH_RBD_MIRROR_MIRROR_STATUS_UPDATER_H
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