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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2012 Inktank, Inc.
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*/
#ifndef CEPH_MMONSYNC_H
#define CEPH_MMONSYNC_H
#include "msg/Message.h"
class MMonSync : public Message {
private:
static constexpr int HEAD_VERSION = 2;
static constexpr int COMPAT_VERSION = 2;
public:
/**
* Operation types
*/
enum {
OP_GET_COOKIE_FULL = 1, // -> start a session (full scan)
OP_GET_COOKIE_RECENT = 2, // -> start a session (only recent paxos events)
OP_COOKIE = 3, // <- pass the iterator cookie, or
OP_GET_CHUNK = 4, // -> get some keys
OP_CHUNK = 5, // <- return some keys
OP_LAST_CHUNK = 6, // <- return the last set of keys
OP_NO_COOKIE = 8, // <- sorry, no cookie
};
/**
* Obtain a string corresponding to the operation type @p op
*
* @param op Operation type
* @returns A string
*/
static const char *get_opname(int op) {
switch (op) {
case OP_GET_COOKIE_FULL: return "get_cookie_full";
case OP_GET_COOKIE_RECENT: return "get_cookie_recent";
case OP_COOKIE: return "cookie";
case OP_GET_CHUNK: return "get_chunk";
case OP_CHUNK: return "chunk";
case OP_LAST_CHUNK: return "last_chunk";
case OP_NO_COOKIE: return "no_cookie";
default: ceph_abort_msg("unknown op type"); return NULL;
}
}
uint32_t op = 0;
uint64_t cookie = 0;
version_t last_committed = 0;
std::pair<std::string,std::string> last_key;
ceph::buffer::list chunk_bl;
entity_inst_t reply_to;
MMonSync()
: Message{MSG_MON_SYNC, HEAD_VERSION, COMPAT_VERSION}
{ }
MMonSync(uint32_t op, uint64_t c = 0)
: Message{MSG_MON_SYNC, HEAD_VERSION, COMPAT_VERSION},
op(op),
cookie(c),
last_committed(0)
{ }
std::string_view get_type_name() const override { return "mon_sync"; }
void print(std::ostream& out) const override {
out << "mon_sync(" << get_opname(op);
if (cookie)
out << " cookie " << cookie;
if (last_committed > 0)
out << " lc " << last_committed;
if (chunk_bl.length())
out << " bl " << chunk_bl.length() << " bytes";
if (!last_key.first.empty() || !last_key.second.empty())
out << " last_key " << last_key.first << "," << last_key.second;
out << ")";
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(op, payload);
encode(cookie, payload);
encode(last_committed, payload);
encode(last_key.first, payload);
encode(last_key.second, payload);
encode(chunk_bl, payload);
encode(reply_to, payload, features);
}
void decode_payload() override {
using ceph::decode;
auto p = payload.cbegin();
decode(op, p);
decode(cookie, p);
decode(last_committed, p);
decode(last_key.first, p);
decode(last_key.second, p);
decode(chunk_bl, p);
decode(reply_to, p);
}
private:
template<class T, typename... Args>
friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
};
#endif /* CEPH_MMONSYNC_H */
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