ceph/src/messages/MDentryLink.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_MDENTRYLINK_H
  17 #define CEPH_MDENTRYLINK_H
  18
  19 #include <string_view>
  20
  21 #include "msg/Message.h"
  22
  23 class MDentryLink : public SafeMessage {
  24 private:
  25   static const int HEAD_VERSION = 1;
  26   static const int COMPAT_VERSION = 1;
  27
  28   dirfrag_t subtree;
  29   dirfrag_t dirfrag;
  30   string dn;
  31   bool is_primary = false;
  32
  33  public:
  34   dirfrag_t get_subtree() const { return subtree; }
  35   dirfrag_t get_dirfrag() const { return dirfrag; }
  36   const string& get_dn() const { return dn; }
  37   bool get_is_primary() const { return is_primary; }
  38
  39   bufferlist bl;
  40
  41 protected:
  42   MDentryLink() :
  43     SafeMessage(MSG_MDS_DENTRYLINK, HEAD_VERSION, COMPAT_VERSION) { }
  44   MDentryLink(dirfrag_t r, dirfrag_t df, std::string_view n, bool p) :
  45     SafeMessage(MSG_MDS_DENTRYLINK, HEAD_VERSION, COMPAT_VERSION),
  46     subtree(r),
  47     dirfrag(df),
  48     dn(n),
  49     is_primary(p) {}
  50   ~MDentryLink() override {}
  51
  52 public:
  53   std::string_view get_type_name() const override { return "dentry_link";}
  54   void print(ostream& o) const override {
  55     o << "dentry_link(" << dirfrag << " " << dn << ")";
  56   }
  57
  58   void decode_payload() override {
  59     auto p = payload.cbegin();
  60     decode(subtree, p);
  61     decode(dirfrag, p);
  62     decode(dn, p);
  63     decode(is_primary, p);
  64     decode(bl, p);
  65   }
  66   void encode_payload(uint64_t features) override {
  67     using ceph::encode;
  68     encode(subtree, payload);
  69     encode(dirfrag, payload);
  70     encode(dn, payload);
  71     encode(is_primary, payload);
  72     encode(bl, payload);
  73   }
  74 private:
  75   template<class T, typename... Args>
  76   friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
  77 };
  78
  79 #endif