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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) 2004-2006 Sage Weil <sage@newdream.net>
*
* 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_MCLIENTSESSION_H
#define CEPH_MCLIENTSESSION_H
#include "msg/Message.h"
#include "mds/mdstypes.h"
class MClientSession : public MessageInstance<MClientSession> {
public:
friend factory;
private:
static constexpr int HEAD_VERSION = 3;
static constexpr int COMPAT_VERSION = 1;
public:
ceph_mds_session_head head;
std::map<std::string, std::string> metadata;
feature_bitset_t supported_features;
int get_op() const { return head.op; }
version_t get_seq() const { return head.seq; }
utime_t get_stamp() const { return utime_t(head.stamp); }
int get_max_caps() const { return head.max_caps; }
int get_max_leases() const { return head.max_leases; }
protected:
MClientSession() : MessageInstance(CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION) { }
MClientSession(int o, version_t s=0) :
MessageInstance(CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION) {
memset(&head, 0, sizeof(head));
head.op = o;
head.seq = s;
}
MClientSession(int o, utime_t st) :
MessageInstance(CEPH_MSG_CLIENT_SESSION, HEAD_VERSION, COMPAT_VERSION) {
memset(&head, 0, sizeof(head));
head.op = o;
head.seq = 0;
st.encode_timeval(&head.stamp);
}
~MClientSession() override {}
public:
std::string_view get_type_name() const override { return "client_session"; }
void print(ostream& out) const override {
out << "client_session(" << ceph_session_op_name(get_op());
if (get_seq())
out << " seq " << get_seq();
if (get_op() == CEPH_SESSION_RECALL_STATE)
out << " max_caps " << head.max_caps << " max_leases " << head.max_leases;
out << ")";
}
void decode_payload() override {
auto p = payload.cbegin();
decode(head, p);
if (header.version >= 2)
decode(metadata, p);
if (header.version >= 3)
decode(supported_features, p);
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(head, payload);
if (metadata.empty() && supported_features.empty()) {
// If we're not trying to send any metadata (always the case if
// we are a server) then send older-format message to avoid upsetting
// old kernel clients.
header.version = 1;
} else {
header.version = HEAD_VERSION;
encode(metadata, payload);
encode(supported_features, payload);
}
}
};
#endif
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