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 MessageInstance<MOSDRepOp, MOSDFastDispatchOp> {
  26 public:
  27   friend factory;
  28 private:
  29   static constexpr int HEAD_VERSION = 2;
  30   static constexpr int COMPAT_VERSION = 1;
  31
  32 public:
  33   epoch_t map_epoch, min_epoch;
  34
  35   // metadata from original request
  36   osd_reqid_t reqid;
  37
  38   spg_t pgid;
  39
  40   bufferlist::const_iterator p;
  41   // Decoding flags. Decoding is only needed for messages caught by pipe reader.
  42   bool final_decode_needed;
  43
  44   // subop
  45   pg_shard_t from;
  46   hobject_t poid;
  47
  48   __u8 acks_wanted;
  49
  50   // transaction to exec
  51   bufferlist logbl;
  52   pg_stat_t pg_stats;
  53
  54   // subop metadata
  55   eversion_t version;
  56
  57   // piggybacked osd/og state
  58   eversion_t pg_trim_to;   // primary->replica: trim to here
  59   eversion_t pg_roll_forward_to;   // primary->replica: trim rollback
  60                                     // info to here
  61
  62   hobject_t new_temp_oid;      ///< new temp object that we must now start tracking
  63   hobject_t discard_temp_oid;  ///< previously used temp object that we can now stop tracking
  64
  65   /// non-empty if this transaction involves a hit_set history update
  66   boost::optional<pg_hit_set_history_t> updated_hit_set_history;
  67
  68   epoch_t get_map_epoch() const override {
  69     return map_epoch;
  70   }
  71   epoch_t get_min_epoch() const override {
  72     return min_epoch;
  73   }
  74   spg_t get_spg() const override {
  75     return pgid;
  76   }
  77
  78   int get_cost() const override {
  79     return data.length();
  80   }
  81
  82   void decode_payload() override {
  83     p = payload.cbegin();
  84     // split to partial and final
  85     decode(map_epoch, p);
  86     if (header.version >= 2) {
  87       decode(min_epoch, p);
  88       decode_trace(p);
  89     } else {
  90       min_epoch = map_epoch;
  91     }
  92     decode(reqid, p);
  93     decode(pgid, p);
  94   }
  95
  96   void finish_decode() {
  97     if (!final_decode_needed)
  98       return; // Message is already final decoded
  99     decode(poid, p);
 100
 101     decode(acks_wanted, p);
 102     decode(version, p);
 103     decode(logbl, p);
 104     decode(pg_stats, p);
 105     decode(pg_trim_to, p);
 106
 107
 108     decode(new_temp_oid, p);
 109     decode(discard_temp_oid, p);
 110
 111     decode(from, p);
 112     decode(updated_hit_set_history, p);
 113     decode(pg_roll_forward_to, p);
 114     final_decode_needed = false;
 115   }
 116
 117   void encode_payload(uint64_t features) override {
 118     using ceph::encode;
 119     encode(map_epoch, payload);
 120     if (HAVE_FEATURE(features, SERVER_LUMINOUS)) {
 121       header.version = HEAD_VERSION;
 122       encode(min_epoch, payload);
 123       encode_trace(payload, features);
 124     } else {
 125       header.version = 1;
 126     }
 127     encode(reqid, payload);
 128     encode(pgid, payload);
 129     encode(poid, payload);
 130
 131     encode(acks_wanted, payload);
 132     encode(version, payload);
 133     encode(logbl, payload);
 134     encode(pg_stats, payload);
 135     encode(pg_trim_to, payload);
 136     encode(new_temp_oid, payload);
 137     encode(discard_temp_oid, payload);
 138     encode(from, payload);
 139     encode(updated_hit_set_history, payload);
 140     encode(pg_roll_forward_to, payload);
 141   }
 142
 143   MOSDRepOp()
 144     : MessageInstance(MSG_OSD_REPOP, HEAD_VERSION, COMPAT_VERSION),
 145       map_epoch(0),
 146       final_decode_needed(true), acks_wanted (0) {}
 147   MOSDRepOp(osd_reqid_t r, pg_shard_t from,
 148             spg_t p, const hobject_t& po, int aw,
 149             epoch_t mape, epoch_t min_epoch, ceph_tid_t rtid, eversion_t v)
 150     : MessageInstance(MSG_OSD_REPOP, HEAD_VERSION, COMPAT_VERSION),
 151       map_epoch(mape),
 152       min_epoch(min_epoch),
 153       reqid(r),
 154       pgid(p),
 155       final_decode_needed(false),
 156       from(from),
 157       poid(po),
 158       acks_wanted(aw),
 159       version(v) {
 160     set_tid(rtid);
 161   }
 162 private:
 163   ~MOSDRepOp() override {}
 164
 165 public:
 166   std::string_view get_type_name() const override { return "osd_repop"; }
 167   void print(ostream& out) const override {
 168     out << "osd_repop(" << reqid
 169         << " " << pgid << " e" << map_epoch << "/" << min_epoch;
 170     if (!final_decode_needed) {
 171       out << " " << poid << " v " << version;
 172       if (updated_hit_set_history)
 173         out << ", has_updated_hit_set_history";
 174     }
 175     out << ")";
 176   }
 177 };
 178
 179
 180 #endif