initial code repo

[stor4nfv.git] / src / ceph / src / mon / PGMonitor.h

diff --git a/src/ceph/src/mon/PGMonitor.h b/src/ceph/src/mon/PGMonitor.h
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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 CEPH_PGMONITOR_H
+#define CEPH_PGMONITOR_H
+
+#include <map>
+#include <set>
+using namespace std;
+
+#include "PGMap.h"
+#include "PaxosService.h"
+#include "include/types.h"
+#include "include/utime.h"
+#include "common/histogram.h"
+#include "msg/Messenger.h"
+#include "mon/MonitorDBStore.h"
+
+class MPGStats;
+class MonPGStatService;
+class PGMonStatService;
+
+class PGMonitor : public PaxosService {
+  PGMap pg_map;
+  std::unique_ptr<PGMonStatService> pgservice;
+
+  bool do_delete = false;   ///< propose deleting pgmap data
+  bool did_delete = false;  ///< we already deleted pgmap data
+
+private:
+  PGMap::Incremental pending_inc;
+
+  bool check_all_pgs = false;
+
+  const char *pgmap_meta_prefix;
+  const char *pgmap_pg_prefix;
+  const char *pgmap_osd_prefix;
+
+  void create_initial() override;
+  void update_from_paxos(bool *need_bootstrap) override;
+  void upgrade_format() override;
+  void on_upgrade() override;
+  void post_paxos_update() override;
+  void handle_osd_timeouts();
+  void create_pending() override;  // prepare a new pending
+  // propose pending update to peers
+  version_t get_trim_to() override;
+  void update_logger();
+
+  void encode_pending(MonitorDBStore::TransactionRef t) override;
+  void read_pgmap_meta();
+  void read_pgmap_full();
+  void apply_pgmap_delta(bufferlist& bl);
+
+  bool preprocess_query(MonOpRequestRef op) override;  // true if processed.
+  bool prepare_update(MonOpRequestRef op) override;
+
+  bool preprocess_pg_stats(MonOpRequestRef op);
+  bool pg_stats_have_changed(int from, const MPGStats *stats) const;
+  bool prepare_pg_stats(MonOpRequestRef op);
+  void _updated_stats(MonOpRequestRef op, MonOpRequestRef ack_op);
+
+  struct C_Stats;
+
+  bool preprocess_command(MonOpRequestRef op);
+  bool prepare_command(MonOpRequestRef op);
+
+  // when we last received PG stats from each osd
+  map<int,utime_t> last_osd_report;
+
+  epoch_t send_pg_creates(int osd, Connection *con, epoch_t next);
+
+public:
+  PGMonitor(Monitor *mn, Paxos *p, const string& service_name);
+  ~PGMonitor() override;
+
+  void get_store_prefixes(set<string>& s) override {
+    s.insert(get_service_name());
+    s.insert(pgmap_meta_prefix);
+    s.insert(pgmap_pg_prefix);
+    s.insert(pgmap_osd_prefix);
+  }
+
+  void on_restart() override;
+
+  /* Courtesy function provided by PaxosService, called when an election
+   * finishes and the cluster goes active. We use it here to make sure we
+   * haven't lost any PGs from new pools. */
+  void on_active() override;
+
+  bool should_stash_full() override {
+    return false;  // never
+  }
+  void encode_full(MonitorDBStore::TransactionRef t) override {
+    assert(0 == "unimplemented encode_full");
+  }
+
+
+  void tick() override;  // check state, take actions
+
+  void check_osd_map(epoch_t epoch);
+
+  int _warn_slow_request_histogram(const pow2_hist_t& h, string suffix,
+                                  list<pair<health_status_t,string> >& summary,
+                                  list<pair<health_status_t,string> > *detail) const;
+
+  void get_health(list<pair<health_status_t,string> >& summary,
+                 list<pair<health_status_t,string> > *detail,
+                 CephContext *cct) const override;
+  void check_full_osd_health(
+    list<pair<health_status_t,string> >& summary,
+    list<pair<health_status_t,string> > *detail,
+    const mempool::pgmap::set<int>& s,
+    const char *desc, health_status_t sev) const;
+
+  void check_subs();
+  bool check_sub(Subscription *sub);
+
+  MonPGStatService *get_pg_stat_service();
+
+private:
+  // no copying allowed
+  PGMonitor(const PGMonitor &rhs);
+  PGMonitor &operator=(const PGMonitor &rhs);
+
+  // we don't want to include gtest.h just for FRIEND_TEST
+  friend class pgmonitor_dump_object_stat_sum_0_Test;
+  friend class pgmonitor_dump_object_stat_sum_1_Test;
+  friend class pgmonitor_dump_object_stat_sum_2_Test;
+};
+
+#endif