1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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.
15 #ifndef CEPH_MMONSUBSCRIBE_H
16 #define CEPH_MMONSUBSCRIBE_H
18 #include "msg/Message.h"
19 #include "include/ceph_features.h"
22 * compatibility with old crap
24 struct ceph_mon_subscribe_item_old {
28 } __attribute__ ((packed));
29 WRITE_RAW_ENCODER(ceph_mon_subscribe_item_old)
32 struct MMonSubscribe : public Message {
34 static const int HEAD_VERSION = 2;
36 map<string, ceph_mon_subscribe_item> what;
38 MMonSubscribe() : Message(CEPH_MSG_MON_SUBSCRIBE, HEAD_VERSION) { }
40 ~MMonSubscribe() override {}
43 void sub_want(const char *w, version_t start, unsigned flags) {
44 what[w].start = start;
45 what[w].flags = flags;
48 const char *get_type_name() const override { return "mon_subscribe"; }
49 void print(ostream& o) const override {
50 o << "mon_subscribe(" << what << ")";
53 void decode_payload() override {
54 bufferlist::iterator p = payload.begin();
55 if (header.version < 2) {
56 map<string, ceph_mon_subscribe_item_old> oldwhat;
59 for (map<string, ceph_mon_subscribe_item_old>::iterator q = oldwhat.begin();
63 what[q->first].start = q->second.have + 1;
65 what[q->first].start = 0;
66 what[q->first].flags = 0;
67 if (q->second.onetime)
68 what[q->first].flags |= CEPH_SUBSCRIBE_ONETIME;
74 void encode_payload(uint64_t features) override {
75 if (features & CEPH_FEATURE_SUBSCRIBE2) {
76 ::encode(what, payload);
77 header.version = HEAD_VERSION;
80 map<string, ceph_mon_subscribe_item_old> oldwhat;
81 for (map<string, ceph_mon_subscribe_item>::iterator q = what.begin();
85 // warning: start=1 -> have=0, which was ambiguous
86 oldwhat[q->first].have = q->second.start - 1;
88 oldwhat[q->first].have = 0;
89 oldwhat[q->first].onetime = q->second.flags & CEPH_SUBSCRIBE_ONETIME;
91 ::encode(oldwhat, payload);