ceph/src/messages/MDirUpdate.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_MDIRUPDATE_H
  17 #define CEPH_MDIRUPDATE_H
  18
  19 #include "msg/Message.h"
  20
  21 class MDirUpdate : public Message {
  22   mds_rank_t from_mds;
  23   dirfrag_t dirfrag;
  24   int32_t dir_rep;
  25   int32_t discover;
  26   compact_set<int32_t> dir_rep_by;
  27   filepath path;
  28   int tried_discover;
  29
  30  public:
  31   mds_rank_t get_source_mds() const { return from_mds; }
  32   dirfrag_t get_dirfrag() const { return dirfrag; }
  33   int get_dir_rep() const { return dir_rep; }
  34   const compact_set<int>& get_dir_rep_by() const { return dir_rep_by; }
  35   bool should_discover() const { return discover > tried_discover; }
  36   const filepath& get_path() const { return path; }
  37
  38   bool has_tried_discover() const { return tried_discover > 0; }
  39   void inc_tried_discover() { ++tried_discover; }
  40
  41   MDirUpdate() : Message(MSG_MDS_DIRUPDATE), tried_discover(0) {}
  42   MDirUpdate(mds_rank_t f,
  43              dirfrag_t dirfrag,
  44              int dir_rep,
  45              compact_set<int>& dir_rep_by,
  46              filepath& path,
  47              bool discover = false) :
  48     Message(MSG_MDS_DIRUPDATE), tried_discover(0) {
  49     this->from_mds = f;
  50     this->dirfrag = dirfrag;
  51     this->dir_rep = dir_rep;
  52     this->dir_rep_by = dir_rep_by;
  53     this->discover = discover ? 5 : 0;
  54     this->path = path;
  55   }
  56 private:
  57   ~MDirUpdate() override {}
  58
  59 public:
  60   const char *get_type_name() const override { return "dir_update"; }
  61   void print(ostream& out) const override {
  62     out << "dir_update(" << get_dirfrag() << ")";
  63   }
  64
  65   void decode_payload() override {
  66     bufferlist::iterator p = payload.begin();
  67     ::decode(from_mds, p);
  68     ::decode(dirfrag, p);
  69     ::decode(dir_rep, p);
  70     ::decode(discover, p);
  71     ::decode(dir_rep_by, p);
  72     ::decode(path, p);
  73   }
  74
  75   void encode_payload(uint64_t features) override {
  76     ::encode(from_mds, payload);
  77     ::encode(dirfrag, payload);
  78     ::encode(dir_rep, payload);
  79     ::encode(discover, payload);
  80     ::encode(dir_rep_by, payload);
  81     ::encode(path, payload);
  82   }
  83 };
  84
  85 #endif