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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_MDS_METRICS_HANDLER_H
#define CEPH_MDS_METRICS_HANDLER_H
#include <thread>
#include <utility>
#include <boost/variant.hpp>
#include "msg/Dispatcher.h"
#include "common/ceph_mutex.h"
#include "include/common_fwd.h"
#include "include/cephfs/metrics/Types.h"
#include "messages/MMDSPing.h"
#include "messages/MClientMetrics.h"
#include "MDSPerfMetricTypes.h"
class MDSRank;
class Session;
class MetricsHandler : public Dispatcher {
public:
MetricsHandler(CephContext *cct, MDSRank *mds);
bool ms_can_fast_dispatch_any() const override {
return true;
}
bool ms_can_fast_dispatch2(const cref_t<Message> &m) const override;
void ms_fast_dispatch2(const ref_t<Message> &m) override;
bool ms_dispatch2(const ref_t<Message> &m) override;
void ms_handle_connect(Connection *c) override {
}
bool ms_handle_reset(Connection *c) override {
return false;
}
void ms_handle_remote_reset(Connection *c) override {
}
bool ms_handle_refused(Connection *c) override {
return false;
}
void add_session(Session *session);
void remove_session(Session *session);
void init();
void shutdown();
void notify_mdsmap(const MDSMap &mdsmap);
private:
struct HandlePayloadVisitor : public boost::static_visitor<void> {
MetricsHandler *metrics_handler;
Session *session;
HandlePayloadVisitor(MetricsHandler *metrics_handler, Session *session)
: metrics_handler(metrics_handler), session(session) {
}
template <typename ClientMetricPayload>
inline void operator()(const ClientMetricPayload &payload) const {
metrics_handler->handle_payload(session, payload);
}
};
MDSRank *mds;
// drop this lock when calling ->send_message_mds() else mds might
// deadlock
ceph::mutex lock = ceph::make_mutex("MetricsHandler::lock");
// ISN sent by rank0 pinger is 1
version_t next_seq = 0;
// sequence number incremented on each update sent to rank 0.
// this is nowhere related to next_seq and is completely used
// locally to figure out if a session got added and removed
// within an update to rank 0.
version_t last_updated_seq = 0;
std::thread updater;
std::map<entity_inst_t, std::pair<version_t, Metrics>> client_metrics_map;
// address of rank 0 mds, so that the message can be sent without
// acquiring mds_lock. misdirected messages to rank 0 are taken
// care of by rank 0.
boost::optional<entity_addrvec_t> addr_rank0;
bool stopping = false;
void handle_payload(Session *session, const CapInfoPayload &payload);
void handle_payload(Session *session, const ReadLatencyPayload &payload);
void handle_payload(Session *session, const WriteLatencyPayload &payload);
void handle_payload(Session *session, const MetadataLatencyPayload &payload);
void handle_payload(Session *session, const DentryLeasePayload &payload);
void handle_payload(Session *session, const OpenedFilesPayload &payload);
void handle_payload(Session *session, const PinnedIcapsPayload &payload);
void handle_payload(Session *session, const OpenedInodesPayload &payload);
void handle_payload(Session *session, const ReadIoSizesPayload &payload);
void handle_payload(Session *session, const WriteIoSizesPayload &payload);
void handle_payload(Session *session, const UnknownPayload &payload);
void set_next_seq(version_t seq);
void reset_seq();
void handle_client_metrics(const cref_t<MClientMetrics> &m);
void handle_mds_ping(const cref_t<MMDSPing> &m);
void update_rank0();
};
#endif // CEPH_MDS_METRICS_HANDLER_H
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