ceph/src/mgr/MgrClient.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2016 John Spray <john.spray@redhat.com>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  */
  13
  14 #ifndef MGR_CLIENT_H_
  15 #define MGR_CLIENT_H_
  16
  17 #include "msg/Dispatcher.h"
  18 #include "mon/MgrMap.h"
  19
  20 #include "msg/Connection.h"
  21
  22 #include "common/perf_counters.h"
  23 #include "common/Timer.h"
  24 #include "common/CommandTable.h"
  25
  26 class MMgrMap;
  27 class MMgrConfigure;
  28 class Messenger;
  29 class MCommandReply;
  30 class MPGStats;
  31
  32 class MgrSessionState
  33 {
  34   public:
  35   // Which performance counters have we already transmitted schema for?
  36   std::set<std::string> declared;
  37
  38   // Our connection to the mgr
  39   ConnectionRef con;
  40 };
  41
  42 class MgrCommand : public CommandOp
  43 {
  44   public:
  45
  46   MgrCommand(ceph_tid_t t) : CommandOp(t) {}
  47   MgrCommand() : CommandOp() {}
  48 };
  49
  50 class MgrClient : public Dispatcher
  51 {
  52 protected:
  53   CephContext *cct;
  54   MgrMap map;
  55   Messenger *msgr;
  56
  57   unique_ptr<MgrSessionState> session;
  58
  59   Mutex lock = {"MgrClient::lock"};
  60
  61   uint32_t stats_period = 0;
  62   SafeTimer timer;
  63
  64   CommandTable<MgrCommand> command_table;
  65
  66   utime_t last_connect_attempt;
  67
  68   Context *report_callback = nullptr;
  69   Context *connect_retry_callback = nullptr;
  70
  71   // If provided, use this to compose an MPGStats to send with
  72   // our reports (hook for use by OSD)
  73   std::function<MPGStats*()> pgstats_cb;
  74
  75   void reconnect();
  76
  77 public:
  78   MgrClient(CephContext *cct_, Messenger *msgr_);
  79
  80   void set_messenger(Messenger *msgr_) { msgr = msgr_; }
  81
  82   void init();
  83   void shutdown();
  84
  85   bool ms_dispatch(Message *m) override;
  86   bool ms_handle_reset(Connection *con) override;
  87   void ms_handle_remote_reset(Connection *con) override {}
  88   bool ms_handle_refused(Connection *con) override;
  89
  90   bool handle_mgr_map(MMgrMap *m);
  91   bool handle_mgr_configure(MMgrConfigure *m);
  92   bool handle_command_reply(MCommandReply *m);
  93
  94   void send_report();
  95   void send_pgstats();
  96
  97   void set_pgstats_cb(std::function<MPGStats*()> cb_)
  98   {
  99     Mutex::Locker l(lock);
 100     pgstats_cb = cb_;
 101   }
 102
 103   int start_command(const vector<string>& cmd, const bufferlist& inbl,
 104                     bufferlist *outbl, string *outs,
 105                     Context *onfinish);
 106 };
 107
 108 #endif
 109