ceph/src/messages/MWatchNotify.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_MWATCHNOTIFY_H
  17 #define CEPH_MWATCHNOTIFY_H
  18
  19 #include "msg/Message.h"
  20
  21
  22 class MWatchNotify : public Message {
  23 private:
  24   static constexpr int HEAD_VERSION = 3;
  25   static constexpr int COMPAT_VERSION = 1;
  26
  27  public:
  28   uint64_t cookie;     ///< client unique id for this watch or notify
  29   uint64_t ver;        ///< unused
  30   uint64_t notify_id;  ///< osd unique id for a notify notification
  31   uint8_t opcode;      ///< CEPH_WATCH_EVENT_*
  32   ceph::buffer::list bl;       ///< notify payload (osd->client)
  33   errorcode32_t return_code; ///< notify result (osd->client)
  34   uint64_t notifier_gid; ///< who sent the notify
  35
  36   MWatchNotify()
  37     : Message{CEPH_MSG_WATCH_NOTIFY, HEAD_VERSION, COMPAT_VERSION} { }
  38   MWatchNotify(uint64_t c, uint64_t v, uint64_t i, uint8_t o, ceph::buffer::list b, uint64_t n=0)
  39     : Message{CEPH_MSG_WATCH_NOTIFY, HEAD_VERSION, COMPAT_VERSION},
  40       cookie(c),
  41       ver(v),
  42       notify_id(i),
  43       opcode(o),
  44       bl(b),
  45       return_code(0),
  46       notifier_gid(n) { }
  47 private:
  48   ~MWatchNotify() override {}
  49
  50 public:
  51   void decode_payload() override {
  52     using ceph::decode;
  53     uint8_t msg_ver;
  54     auto p = payload.cbegin();
  55     decode(msg_ver, p);
  56     decode(opcode, p);
  57     decode(cookie, p);
  58     decode(ver, p);
  59     decode(notify_id, p);
  60     if (msg_ver >= 1)
  61       decode(bl, p);
  62     if (header.version >= 2)
  63       decode(return_code, p);
  64     else
  65       return_code = 0;
  66     if (header.version >= 3)
  67       decode(notifier_gid, p);
  68     else
  69       notifier_gid = 0;
  70   }
  71   void encode_payload(uint64_t features) override {
  72     using ceph::encode;
  73     uint8_t msg_ver = 1;
  74     encode(msg_ver, payload);
  75     encode(opcode, payload);
  76     encode(cookie, payload);
  77     encode(ver, payload);
  78     encode(notify_id, payload);
  79     encode(bl, payload);
  80     encode(return_code, payload);
  81     encode(notifier_gid, payload);
  82   }
  83
  84   std::string_view get_type_name() const override { return "watch-notify"; }
  85   void print(std::ostream& out) const override {
  86     out << "watch-notify("
  87         << ceph_watch_event_name(opcode) << " (" << (int)opcode << ")"
  88         << " cookie " << cookie
  89         << " notify " << notify_id
  90         << " ret " << return_code
  91         << ")";
  92   }
  93 private:
  94   template<class T, typename... Args>
  95   friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
  96 };
  97
  98 #endif