ceph/src/messages/MOSDRepOp.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_MOSDREPOP_H
  17 #define CEPH_MOSDREPOP_H
  18
  19 #include "MOSDFastDispatchOp.h"
  20
  21 /*
  22  * OSD sub op - for internal ops on pobjects between primary and replicas(/stripes/whatever)
  23  */
  24
  25 class MOSDRepOp : public MOSDFastDispatchOp {
  26
  27   static const int HEAD_VERSION = 2;
  28   static const int COMPAT_VERSION = 1;
  29
  30 public:
  31   epoch_t map_epoch, min_epoch;
  32
  33   // metadata from original request
  34   osd_reqid_t reqid;
  35
  36   spg_t pgid;
  37
  38   bufferlist::iterator p;
  39   // Decoding flags. Decoding is only needed for messages catched by pipe reader.
  40   bool final_decode_needed;
  41
  42   // subop
  43   pg_shard_t from;
  44   hobject_t poid;
  45
  46   __u8 acks_wanted;
  47
  48   // transaction to exec
  49   bufferlist logbl;
  50   pg_stat_t pg_stats;
  51
  52   // subop metadata
  53   eversion_t version;
  54
  55   // piggybacked osd/og state
  56   eversion_t pg_trim_to;   // primary->replica: trim to here
  57   eversion_t pg_roll_forward_to;   // primary->replica: trim rollback
  58                                     // info to here
  59
  60   hobject_t new_temp_oid;      ///< new temp object that we must now start tracking
  61   hobject_t discard_temp_oid;  ///< previously used temp object that we can now stop tracking
  62
  63   /// non-empty if this transaction involves a hit_set history update
  64   boost::optional<pg_hit_set_history_t> updated_hit_set_history;
  65
  66   epoch_t get_map_epoch() const override {
  67     return map_epoch;
  68   }
  69   epoch_t get_min_epoch() const override {
  70     return min_epoch;
  71   }
  72   spg_t get_spg() const override {
  73     return pgid;
  74   }
  75
  76   int get_cost() const override {
  77     return data.length();
  78   }
  79
  80   void decode_payload() override {
  81     p = payload.begin();
  82     // splitted to partial and final
  83     ::decode(map_epoch, p);
  84     if (header.version >= 2) {
  85       ::decode(min_epoch, p);
  86       decode_trace(p);
  87     } else {
  88       min_epoch = map_epoch;
  89     }
  90     ::decode(reqid, p);
  91     ::decode(pgid, p);
  92   }
  93
  94   void finish_decode() {
  95     if (!final_decode_needed)
  96       return; // Message is already final decoded
  97     ::decode(poid, p);
  98
  99     ::decode(acks_wanted, p);
 100     ::decode(version, p);
 101     ::decode(logbl, p);
 102     ::decode(pg_stats, p);
 103     ::decode(pg_trim_to, p);
 104
 105
 106     ::decode(new_temp_oid, p);
 107     ::decode(discard_temp_oid, p);
 108
 109     ::decode(from, p);
 110     ::decode(updated_hit_set_history, p);
 111     ::decode(pg_roll_forward_to, p);
 112     final_decode_needed = false;
 113   }
 114
 115   void encode_payload(uint64_t features) override {
 116     ::encode(map_epoch, payload);
 117     if (HAVE_FEATURE(features, SERVER_LUMINOUS)) {
 118       header.version = HEAD_VERSION;
 119       ::encode(min_epoch, payload);
 120       encode_trace(payload, features);
 121     } else {
 122       header.version = 1;
 123     }
 124     ::encode(reqid, payload);
 125     ::encode(pgid, payload);
 126     ::encode(poid, payload);
 127
 128     ::encode(acks_wanted, payload);
 129     ::encode(version, payload);
 130     ::encode(logbl, payload);
 131     ::encode(pg_stats, payload);
 132     ::encode(pg_trim_to, payload);
 133     ::encode(new_temp_oid, payload);
 134     ::encode(discard_temp_oid, payload);
 135     ::encode(from, payload);
 136     ::encode(updated_hit_set_history, payload);
 137     ::encode(pg_roll_forward_to, payload);
 138   }
 139
 140   MOSDRepOp()
 141     : MOSDFastDispatchOp(MSG_OSD_REPOP, HEAD_VERSION, COMPAT_VERSION),
 142       map_epoch(0),
 143       final_decode_needed(true), acks_wanted (0) {}
 144   MOSDRepOp(osd_reqid_t r, pg_shard_t from,
 145             spg_t p, const hobject_t& po, int aw,
 146             epoch_t mape, epoch_t min_epoch, ceph_tid_t rtid, eversion_t v)
 147     : MOSDFastDispatchOp(MSG_OSD_REPOP, HEAD_VERSION, COMPAT_VERSION),
 148       map_epoch(mape),
 149       min_epoch(min_epoch),
 150       reqid(r),
 151       pgid(p),
 152       final_decode_needed(false),
 153       from(from),
 154       poid(po),
 155       acks_wanted(aw),
 156       version(v) {
 157     set_tid(rtid);
 158   }
 159 private:
 160   ~MOSDRepOp() override {}
 161
 162 public:
 163   const char *get_type_name() const override { return "osd_repop"; }
 164   void print(ostream& out) const override {
 165     out << "osd_repop(" << reqid
 166         << " " << pgid << " e" << map_epoch << "/" << min_epoch;
 167     if (!final_decode_needed) {
 168       out << " " << poid << " v " << version;
 169       if (updated_hit_set_history)
 170         out << ", has_updated_hit_set_history";
 171     }
 172     out << ")";
 173   }
 174 };
 175
 176
 177 #endif