ceph/src/messages/MDiscover.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_MDISCOVER_H
  17 #define CEPH_MDISCOVER_H
  18
  19 #include "msg/Message.h"
  20 #include "include/filepath.h"
  21
  22 #include <string>
  23
  24
  25 class MDiscover : public MessageInstance<MDiscover> {
  26 public:
  27   friend factory;
  28 private:
  29
  30   inodeno_t       base_ino;          // 1 -> root
  31   frag_t          base_dir_frag;
  32
  33   snapid_t        snapid;
  34   filepath        want;   // ... [/]need/this/stuff
  35
  36   bool want_base_dir = true;
  37   bool want_xlocked = false;
  38
  39  public:
  40   inodeno_t get_base_ino() const { return base_ino; }
  41   frag_t    get_base_dir_frag() const { return base_dir_frag; }
  42   snapid_t  get_snapid() const { return snapid; }
  43
  44   const filepath& get_want() const { return want; }
  45   const std::string& get_dentry(int n) const { return want[n]; }
  46
  47   bool wants_base_dir() const { return want_base_dir; }
  48   bool wants_xlocked() const { return want_xlocked; }
  49
  50   void set_base_dir_frag(frag_t f) { base_dir_frag = f; }
  51
  52 protected:
  53   MDiscover() : MessageInstance(MSG_MDS_DISCOVER) { }
  54   MDiscover(inodeno_t base_ino_,
  55             frag_t base_frag_,
  56             snapid_t s,
  57             filepath& want_path_,
  58             bool want_base_dir_ = true,
  59             bool discover_xlocks_ = false) :
  60     MessageInstance(MSG_MDS_DISCOVER),
  61     base_ino(base_ino_),
  62     base_dir_frag(base_frag_),
  63     snapid(s),
  64     want(want_path_),
  65     want_base_dir(want_base_dir_),
  66     want_xlocked(discover_xlocks_) { }
  67   ~MDiscover() override {}
  68
  69 public:
  70   std::string_view get_type_name() const override { return "Dis"; }
  71   void print(ostream &out) const override {
  72     out << "discover(" << header.tid << " " << base_ino << "." << base_dir_frag
  73         << " " << want << ")";
  74   }
  75
  76   void decode_payload() override {
  77     auto p = payload.cbegin();
  78     decode(base_ino, p);
  79     decode(base_dir_frag, p);
  80     decode(snapid, p);
  81     decode(want, p);
  82     decode(want_base_dir, p);
  83     decode(want_xlocked, p);
  84   }
  85   void encode_payload(uint64_t features) override {
  86     using ceph::encode;
  87     encode(base_ino, payload);
  88     encode(base_dir_frag, payload);
  89     encode(snapid, payload);
  90     encode(want, payload);
  91     encode(want_base_dir, payload);
  92     encode(want_xlocked, payload);
  93   }
  94
  95 };
  96
  97 #endif