ceph/src/messages/MExportCaps.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_MEXPORTCAPS_H
  17 #define CEPH_MEXPORTCAPS_H
  18
  19 #include "messages/MMDSOp.h"
  20
  21 class MExportCaps final : public MMDSOp {
  22 private:
  23   static constexpr int HEAD_VERSION = 2;
  24   static constexpr int COMPAT_VERSION = 1;
  25
  26 public:
  27   inodeno_t ino;
  28   ceph::buffer::list cap_bl;
  29   std::map<client_t,entity_inst_t> client_map;
  30   std::map<client_t,client_metadata_t> client_metadata_map;
  31
  32 protected:
  33   MExportCaps() :
  34     MMDSOp{MSG_MDS_EXPORTCAPS, HEAD_VERSION, COMPAT_VERSION} {}
  35   ~MExportCaps() final {}
  36
  37 public:
  38   std::string_view get_type_name() const override { return "export_caps"; }
  39   void print(std::ostream& o) const override {
  40     o << "export_caps(" << ino << ")";
  41   }
  42
  43   void encode_payload(uint64_t features) override {
  44     using ceph::encode;
  45     encode(ino, payload);
  46     encode(cap_bl, payload);
  47     encode(client_map, payload, features);
  48     encode(client_metadata_map, payload);
  49   }
  50   void decode_payload() override {
  51     using ceph::decode;
  52     auto p = payload.cbegin();
  53     decode(ino, p);
  54     decode(cap_bl, p);
  55     decode(client_map, p);
  56     if (header.version >= 2)
  57       decode(client_metadata_map, p);
  58   }
  59 private:
  60   template<class T, typename... Args>
  61   friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
  62   template<class T, typename... Args>
  63   friend MURef<T> crimson::make_message(Args&&... args);
  64 };
  65
  66 #endif