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 MessageInstance<MOSDFailure, PaxosServiceMessage> {
  23 public:
  24   friend factory;
  25 private:
  26   static constexpr int HEAD_VERSION = 4;
  27   static constexpr int COMPAT_VERSION = 4;
  28
  29  public:
  30   enum {
  31     FLAG_ALIVE = 0,      // use this on its own to mark as "I'm still alive"
  32     FLAG_FAILED = 1,     // if set, failure; if not, recovery
  33     FLAG_IMMEDIATE = 2,  // known failure, not a timeout
  34   };
  35
  36   uuid_d fsid;
  37   int32_t target_osd;
  38   entity_addrvec_t target_addrs;
  39   __u8 flags = 0;
  40   epoch_t epoch = 0;
  41   int32_t failed_for = 0;  // known to be failed since at least this long
  42
  43   MOSDFailure() : MessageInstance(MSG_OSD_FAILURE, 0, HEAD_VERSION) { }
  44   MOSDFailure(const uuid_d &fs, int osd, const entity_addrvec_t& av,
  45               int duration, epoch_t e)
  46     : MessageInstance(MSG_OSD_FAILURE, e, HEAD_VERSION, COMPAT_VERSION),
  47       fsid(fs),
  48       target_osd(osd),
  49       target_addrs(av),
  50       flags(FLAG_FAILED),
  51       epoch(e), failed_for(duration) { }
  52   MOSDFailure(const uuid_d &fs, int osd, const entity_addrvec_t& av,
  53               int duration,
  54               epoch_t e, __u8 extra_flags)
  55     : MessageInstance(MSG_OSD_FAILURE, e, HEAD_VERSION, COMPAT_VERSION),
  56       fsid(fs),
  57       target_osd(osd),
  58       target_addrs(av),
  59       flags(extra_flags),
  60       epoch(e), failed_for(duration) { }
  61 private:
  62   ~MOSDFailure() override {}
  63
  64 public:
  65   int get_target_osd() { return target_osd; }
  66   const entity_addrvec_t& get_target_addrs() { return target_addrs; }
  67   bool if_osd_failed() const {
  68     return flags & FLAG_FAILED;
  69   }
  70   bool is_immediate() const {
  71     return flags & FLAG_IMMEDIATE;
  72   }
  73   epoch_t get_epoch() const { return epoch; }
  74
  75   void decode_payload() override {
  76     auto p = payload.cbegin();
  77     paxos_decode(p);
  78     decode(fsid, p);
  79     if (header.version < 4) {
  80       entity_inst_t i;
  81       decode(i, p);
  82       target_osd = i.name.num();
  83       target_addrs.v.push_back(i.addr);
  84     } else {
  85       decode(target_osd, p);
  86       decode(target_addrs, p);
  87     }
  88     decode(epoch, p);
  89     decode(flags, p);
  90     decode(failed_for, p);
  91   }
  92
  93   void encode_payload(uint64_t features) override {
  94     using ceph::encode;
  95     paxos_encode();
  96     if (!HAVE_FEATURE(features, SERVER_NAUTILUS)) {
  97       header.version = 3;
  98       header.compat_version = 3;
  99       encode(fsid, payload);
 100       encode(entity_inst_t(entity_name_t::OSD(target_osd),
 101                            target_addrs.legacy_addr()), payload, features);
 102       encode(epoch, payload);
 103       encode(flags, payload);
 104       encode(failed_for, payload);
 105       return;
 106     }
 107     header.version = HEAD_VERSION;
 108     header.compat_version = COMPAT_VERSION;
 109     encode(fsid, payload);
 110     encode(target_osd, payload, features);
 111     encode(target_addrs, payload, features);
 112     encode(epoch, payload);
 113     encode(flags, payload);
 114     encode(failed_for, payload);
 115   }
 116
 117   std::string_view get_type_name() const override { return "osd_failure"; }
 118   void print(ostream& out) const override {
 119     out << "osd_failure("
 120         << (if_osd_failed() ? "failed " : "recovered ")
 121         << (is_immediate() ? "immediate " : "timeout ")
 122         << "osd." << target_osd << " " << target_addrs
 123         << " for " << failed_for << "sec e" << epoch
 124         << " v" << version << ")";
 125   }
 126 };
 127
 128 #endif