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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_IMAGE_SYNC_THROTTLER_H
#define RBD_MIRROR_IMAGE_SYNC_THROTTLER_H
#include <list>
#include <map>
#include <set>
#include <sstream>
#include <string>
#include <utility>
#include "common/Mutex.h"
#include "common/config_obs.h"
class CephContext;
class Context;
namespace ceph { class Formatter; }
namespace librbd { class ImageCtx; }
namespace rbd {
namespace mirror {
template <typename ImageCtxT = librbd::ImageCtx>
class ImageSyncThrottler : public md_config_obs_t {
public:
static ImageSyncThrottler *create(CephContext *cct) {
return new ImageSyncThrottler(cct);
}
void destroy() {
delete this;
}
ImageSyncThrottler(CephContext *cct);
~ImageSyncThrottler() override;
void set_max_concurrent_syncs(uint32_t max);
void start_op(const std::string &id, Context *on_start);
bool cancel_op(const std::string &id);
void finish_op(const std::string &id);
void drain(int r);
void print_status(Formatter *f, std::stringstream *ss);
private:
CephContext *m_cct;
Mutex m_lock;
uint32_t m_max_concurrent_syncs;
std::list<std::string> m_queue;
std::map<std::string, Context *> m_queued_ops;
std::set<std::string> m_inflight_ops;
const char **get_tracked_conf_keys() const override;
void handle_conf_change(const ConfigProxy& conf,
const std::set<std::string> &changed) override;
};
} // namespace mirror
} // namespace rbd
extern template class rbd::mirror::ImageSyncThrottler<librbd::ImageCtx>;
#endif // RBD_MIRROR_IMAGE_SYNC_THROTTLER_H
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