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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2014 Adam Crume <adamcrume@gmail.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#ifndef _INCLUDED_RBD_REPLAY_REPLAYER_HPP
#define _INCLUDED_RBD_REPLAY_REPLAYER_HPP
#include <chrono>
#include <mutex>
#include <thread>
#include <condition_variable>
#include "rbd_replay/ActionTypes.h"
#include "BoundedBuffer.hpp"
#include "ImageNameMap.hpp"
#include "PendingIO.hpp"
namespace rbd_replay {
class Replayer;
/**
Performs Actions within a single thread.
*/
class Worker : public ActionCtx {
public:
explicit Worker(Replayer &replayer);
void start();
/// Should only be called by StopThreadAction
void stop() override;
void join();
void send(Action::ptr action);
void add_pending(PendingIO::ptr io) override;
void remove_pending(PendingIO::ptr io) override;
librbd::Image* get_image(imagectx_id_t imagectx_id) override;
void put_image(imagectx_id_t imagectx_id, librbd::Image* image) override;
void erase_image(imagectx_id_t imagectx_id) override;
librbd::RBD* rbd() override;
librados::IoCtx* ioctx() override;
void set_action_complete(action_id_t id) override;
bool readonly() const override;
rbd_loc map_image_name(std::string image_name, std::string snap_name) const override;
private:
void run();
Replayer &m_replayer;
BoundedBuffer<Action::ptr> m_buffer;
std::shared_ptr<std::thread> m_thread;
std::map<action_id_t, PendingIO::ptr> m_pending_ios;
std::mutex m_pending_ios_mutex;
std::condition_variable_any m_pending_ios_empty;
bool m_done;
};
class Replayer {
public:
explicit Replayer(int num_action_trackers);
~Replayer();
void run(const std::string &replay_file);
librbd::RBD* get_rbd() {
return m_rbd;
}
librados::IoCtx* get_ioctx() {
return m_ioctx;
}
librbd::Image* get_image(imagectx_id_t imagectx_id);
void put_image(imagectx_id_t imagectx_id, librbd::Image *image);
void erase_image(imagectx_id_t imagectx_id);
void set_action_complete(action_id_t id);
bool is_action_complete(action_id_t id);
void wait_for_actions(const action::Dependencies &deps);
std::string pool_name() const;
void set_pool_name(std::string pool_name);
void set_latency_multiplier(float f);
bool readonly() const;
void set_readonly(bool readonly);
void set_image_name_map(const ImageNameMap &map) {
m_image_name_map = map;
}
void set_dump_perf_counters(bool dump_perf_counters) {
m_dump_perf_counters = dump_perf_counters;
}
const ImageNameMap &image_name_map() const {
return m_image_name_map;
}
private:
struct action_tracker_d {
/// Maps an action ID to the time the action completed
std::map<action_id_t, std::chrono::system_clock::time_point> actions;
std::shared_mutex mutex;
std::condition_variable_any condition;
};
void clear_images();
action_tracker_d &tracker_for(action_id_t id);
/// Disallow copying
Replayer(const Replayer& rhs);
/// Disallow assignment
const Replayer& operator=(const Replayer& rhs);
librbd::RBD* m_rbd;
librados::IoCtx* m_ioctx;
std::string m_pool_name;
float m_latency_multiplier;
bool m_readonly;
ImageNameMap m_image_name_map;
bool m_dump_perf_counters;
std::map<imagectx_id_t, librbd::Image*> m_images;
std::shared_mutex m_images_mutex;
/// Actions are hashed across the trackers by ID.
/// Number of trackers should probably be larger than the number of cores and prime.
/// Should definitely be odd.
const int m_num_action_trackers;
action_tracker_d* m_action_trackers;
};
}
#endif
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