ceph/src/mds/events/ESessions.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) 2004-2006 Sage Weil <sage@newdream.net>
   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
  15 #ifndef CEPH_MDS_ESESSIONS_H
  16 #define CEPH_MDS_ESESSIONS_H
  17
  18 #include "common/config.h"
  19 #include "include/types.h"
  20
  21 #include "../LogEvent.h"
  22
  23 class ESessions : public LogEvent {
  24 protected:
  25   version_t cmapv;  // client map version
  26
  27 public:
  28   map<client_t,entity_inst_t> client_map;
  29   bool old_style_encode;
  30
  31   ESessions() : LogEvent(EVENT_SESSIONS), cmapv(0), old_style_encode(false) { }
  32   ESessions(version_t pv, map<client_t,entity_inst_t>& cm) :
  33     LogEvent(EVENT_SESSIONS),
  34     cmapv(pv),
  35     old_style_encode(false) {
  36     client_map.swap(cm);
  37   }
  38
  39   void mark_old_encoding() { old_style_encode = true; }
  40
  41   void encode(bufferlist &bl, uint64_t features) const override;
  42   void decode_old(bufferlist::iterator &bl);
  43   void decode_new(bufferlist::iterator &bl);
  44   void decode(bufferlist::iterator &bl) override {
  45     if (old_style_encode) decode_old(bl);
  46     else decode_new(bl);
  47   }
  48   void dump(Formatter *f) const override;
  49   static void generate_test_instances(list<ESessions*>& ls);
  50
  51   void print(ostream& out) const override {
  52     out << "ESessions " << client_map.size() << " opens cmapv " << cmapv;
  53   }
  54
  55   void update_segment() override;
  56   void replay(MDSRank *mds) override;
  57 };
  58 WRITE_CLASS_ENCODER_FEATURES(ESessions)
  59
  60 #endif