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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.
*
*/
/*
* Placement Group Monitor. Placement Groups are logical sets of objects
* that are replicated by the same set of devices.
*/
#ifndef __PGMONITOR_H
#define __PGMONITOR_H
#include <map>
#include <set>
using namespace std;
#include "include/types.h"
#include "msg/Messenger.h"
#include "PaxosService.h"
#include "PGMap.h"
class MPGStats;
class MPGStatsAck;
class MStatfs;
class MMonCommand;
class PGMonitor : public PaxosService {
public:
PGMap pg_map;
private:
PGMap::Incremental pending_inc;
void create_initial(bufferlist& bl);
bool update_from_paxos();
void create_pending(); // prepare a new pending
void encode_pending(bufferlist &bl); // propose pending update to peers
void committed();
bool preprocess_query(Message *m); // true if processed.
bool prepare_update(Message *m);
bool preprocess_pg_stats(MPGStats *stats);
bool prepare_pg_stats(MPGStats *stats);
void _updated_stats(MPGStatsAck *ack, entity_inst_t who);
struct C_Stats : public Context {
PGMonitor *pgmon;
MPGStatsAck *ack;
entity_inst_t who;
C_Stats(PGMonitor *p, MPGStatsAck *a, entity_inst_t w) : pgmon(p), ack(a), who(w) {}
void finish(int r) {
pgmon->_updated_stats(ack, who);
}
};
void handle_statfs(MStatfs *statfs);
bool preprocess_command(MMonCommand *m);
bool prepare_command(MMonCommand *m);
map<int,utime_t> last_sent_pg_create; // per osd throttle
bool register_new_pgs();
void send_pg_creates();
public:
PGMonitor(Monitor *mn, Paxos *p) : PaxosService(mn, p) { }
void tick(); // check state, take actions
void check_osd_map(epoch_t epoch);
};
#endif
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