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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) 2004-2006 Sage Weil <sage@newdream.net>
*
* 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.
*
*/
/* Metadata Server Monitor
*/
#ifndef CEPH_MDSMONITOR_H
#define CEPH_MDSMONITOR_H
#include <map>
#include <set>
using namespace std;
#include "include/types.h"
#include "msg/Messenger.h"
#include "mds/MDSMap.h"
#include "PaxosService.h"
#include "Session.h"
#include "messages/MMDSBeacon.h"
class MMDSGetMap;
class MMonCommand;
class MMDSLoadTargets;
class MDSMonitor : public PaxosService {
public:
// mds maps
MDSMap mdsmap; // current
bufferlist mdsmap_bl; // encoded
MDSMap pending_mdsmap; // current + pending updates
// my helpers
void print_map(MDSMap &m, int dbl=7);
class C_Updated : public Context {
MDSMonitor *mm;
MMDSBeacon *m;
public:
C_Updated(MDSMonitor *a, MMDSBeacon *c) :
mm(a), m(c) {}
void finish(int r) {
if (r == -ECANCELED) {
if (m)
m->put();
return;
}
if (r >= 0)
mm->_updated(m); // success
else
mm->dispatch((PaxosServiceMessage*)m); // try again
}
};
void create_new_fs(MDSMap &m, int metadata_pool, int data_pool);
// service methods
void create_initial();
void update_from_paxos();
void create_pending();
void encode_pending(bufferlist &bl);
void update_logger();
void _updated(MMDSBeacon *m);
bool preprocess_query(PaxosServiceMessage *m); // true if processed.
bool prepare_update(PaxosServiceMessage *m);
bool should_propose(double& delay);
void on_active();
void _note_beacon(class MMDSBeacon *m);
bool preprocess_beacon(class MMDSBeacon *m);
bool prepare_beacon(class MMDSBeacon *m);
bool preprocess_offload_targets(MMDSLoadTargets *m);
bool prepare_offload_targets(MMDSLoadTargets *m);
void get_health(list<pair<health_status_t,string> >& summary,
list<pair<health_status_t,string> > *detail) const;
int fail_mds(std::ostream &ss, const std::string &arg);
int cluster_fail(std::ostream &ss);
bool preprocess_command(MMonCommand *m);
bool prepare_command(MMonCommand *m);
// beacons
struct beacon_info_t {
utime_t stamp;
uint64_t seq;
};
map<uint64_t, beacon_info_t> last_beacon;
bool try_standby_replay(MDSMap::mds_info_t& finfo, MDSMap::mds_info_t& ainfo);
public:
MDSMonitor(Monitor *mn, Paxos *p)
: PaxosService(mn, p)
{
}
void tick(); // check state, take actions
void do_stop();
void dump_info(Formatter *f);
void check_subs();
void check_sub(Subscription *sub);
};
#endif
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