ceph/src/messages/MOSDFailure.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
  16 #ifndef CEPH_MOSDFAILURE_H
  17 #define CEPH_MOSDFAILURE_H
  18
  19 #include "messages/PaxosServiceMessage.h"
  20
  21
  22 class MOSDFailure : public PaxosServiceMessage {
  23
  24   static const int HEAD_VERSION = 3;
  25   static const int COMPAT_VERSION = 3;
  26
  27  public:
  28   enum {
  29     FLAG_ALIVE = 0,      // use this on its own to mark as "I'm still alive"
  30     FLAG_FAILED = 1,     // if set, failure; if not, recovery
  31     FLAG_IMMEDIATE = 2,  // known failure, not a timeout
  32   };
  33
  34   uuid_d fsid;
  35   entity_inst_t target_osd;
  36   __u8 flags = 0;
  37   epoch_t       epoch = 0;
  38   int32_t failed_for = 0;  // known to be failed since at least this long
  39
  40   MOSDFailure() : PaxosServiceMessage(MSG_OSD_FAILURE, 0, HEAD_VERSION) { }
  41   MOSDFailure(const uuid_d &fs, const entity_inst_t& f, int duration, epoch_t e)
  42     : PaxosServiceMessage(MSG_OSD_FAILURE, e, HEAD_VERSION, COMPAT_VERSION),
  43       fsid(fs), target_osd(f),
  44       flags(FLAG_FAILED),
  45       epoch(e), failed_for(duration) { }
  46   MOSDFailure(const uuid_d &fs, const entity_inst_t& f, int duration,
  47               epoch_t e, __u8 extra_flags)
  48     : PaxosServiceMessage(MSG_OSD_FAILURE, e, HEAD_VERSION, COMPAT_VERSION),
  49       fsid(fs), target_osd(f),
  50       flags(extra_flags),
  51       epoch(e), failed_for(duration) { }
  52 private:
  53   ~MOSDFailure() override {}
  54
  55 public:
  56   entity_inst_t get_target() { return target_osd; }
  57   bool if_osd_failed() const {
  58     return flags & FLAG_FAILED;
  59   }
  60   bool is_immediate() const {
  61     return flags & FLAG_IMMEDIATE;
  62   }
  63   epoch_t get_epoch() const { return epoch; }
  64
  65   void decode_payload() override {
  66     bufferlist::iterator p = payload.begin();
  67     paxos_decode(p);
  68     ::decode(fsid, p);
  69     ::decode(target_osd, p);
  70     ::decode(epoch, p);
  71     ::decode(flags, p);
  72     ::decode(failed_for, p);
  73   }
  74
  75   void encode_payload(uint64_t features) override {
  76     paxos_encode();
  77     ::encode(fsid, payload);
  78     ::encode(target_osd, payload, features);
  79     ::encode(epoch, payload);
  80     ::encode(flags, payload);
  81     ::encode(failed_for, payload);
  82   }
  83
  84   const char *get_type_name() const override { return "osd_failure"; }
  85   void print(ostream& out) const override {
  86     out << "osd_failure("
  87         << (if_osd_failed() ? "failed " : "recovered ")
  88         << (is_immediate() ? "immediate " : "timeout ")
  89         << target_osd << " for " << failed_for << "sec e" << epoch
  90         << " v" << version << ")";
  91   }
  92 };
  93
  94 #endif