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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef RBD_MIRROR_INSTANCE_REPLAYER_H
#define RBD_MIRROR_INSTANCE_REPLAYER_H
#include <map>
#include <sstream>
#include "common/AsyncOpTracker.h"
#include "common/Formatter.h"
#include "common/Mutex.h"
#include "tools/rbd_mirror/Types.h"
namespace librbd { class ImageCtx; }
namespace rbd {
namespace mirror {
template <typename> class ImageReplayer;
template <typename> class InstanceWatcher;
template <typename> class ServiceDaemon;
template <typename> struct Threads;
template <typename ImageCtxT = librbd::ImageCtx>
class InstanceReplayer {
public:
static InstanceReplayer* create(
Threads<ImageCtxT> *threads,
ServiceDaemon<ImageCtxT>* service_daemon,
RadosRef local_rados, const std::string &local_mirror_uuid,
int64_t local_pool_id) {
return new InstanceReplayer(threads, service_daemon, local_rados,
local_mirror_uuid, local_pool_id);
}
void destroy() {
delete this;
}
InstanceReplayer(Threads<ImageCtxT> *threads,
ServiceDaemon<ImageCtxT>* service_daemon,
RadosRef local_rados, const std::string &local_mirror_uuid,
int64_t local_pool_id);
~InstanceReplayer();
bool is_blacklisted() const;
int init();
void shut_down();
void init(Context *on_finish);
void shut_down(Context *on_finish);
void add_peer(std::string peer_uuid, librados::IoCtx io_ctx);
void acquire_image(InstanceWatcher<ImageCtxT> *instance_watcher,
const std::string &global_image_id, Context *on_finish);
void release_image(const std::string &global_image_id, Context *on_finish);
void remove_peer_image(const std::string &global_image_id,
const std::string &peer_mirror_uuid,
Context *on_finish);
void release_all(Context *on_finish);
void print_status(Formatter *f, stringstream *ss);
void start();
void stop();
void restart();
void flush();
private:
/**
* @verbatim
*
* <uninitialized> <-------------------\
* | (init) | (repeat for each
* v STOP_IMAGE_REPLAYER ---\ image replayer)
* SCHEDULE_IMAGE_STATE_CHECK_TASK ^ ^ |
* | | | |
* v (shut_down) | \---------/
* <initialized> -----------------> WAIT_FOR_OPS
*
* @endverbatim
*/
Threads<ImageCtxT> *m_threads;
ServiceDaemon<ImageCtxT>* m_service_daemon;
RadosRef m_local_rados;
std::string m_local_mirror_uuid;
int64_t m_local_pool_id;
mutable Mutex m_lock;
AsyncOpTracker m_async_op_tracker;
std::map<std::string, ImageReplayer<ImageCtxT> *> m_image_replayers;
Peers m_peers;
Context *m_image_state_check_task = nullptr;
Context *m_on_shut_down = nullptr;
bool m_manual_stop = false;
bool m_blacklisted = false;
void wait_for_ops();
void handle_wait_for_ops(int r);
void start_image_replayer(ImageReplayer<ImageCtxT> *image_replayer);
void queue_start_image_replayers();
void start_image_replayers(int r);
void stop_image_replayer(ImageReplayer<ImageCtxT> *image_replayer,
Context *on_finish);
void stop_image_replayers();
void handle_stop_image_replayers(int r);
void schedule_image_state_check_task();
void cancel_image_state_check_task();
};
} // namespace mirror
} // namespace rbd
extern template class rbd::mirror::InstanceReplayer<librbd::ImageCtx>;
#endif // RBD_MIRROR_INSTANCE_REPLAYER_H
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