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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_MCLIENTRECONNECT_H
#define CEPH_MCLIENTRECONNECT_H
#include "msg/Message.h"
#include "mds/mdstypes.h"
#include "include/ceph_features.h"
class MClientReconnect : public MessageInstance<MClientReconnect> {
public:
friend factory;
private:
static constexpr int HEAD_VERSION = 5;
static constexpr int COMPAT_VERSION = 4;
public:
map<inodeno_t, cap_reconnect_t> caps; // only head inodes
vector<snaprealm_reconnect_t> realms;
bool more = false;
MClientReconnect() :
MessageInstance(CEPH_MSG_CLIENT_RECONNECT, HEAD_VERSION, COMPAT_VERSION) {}
private:
~MClientReconnect() override {}
size_t cap_size = 0;
size_t realm_size = 0;
size_t approx_size = sizeof(__u32) + sizeof(__u32) + 1;
void calc_item_size() {
using ceph::encode;
{
bufferlist bl;
inodeno_t ino;
cap_reconnect_t cr;
encode(ino, bl);
encode(cr, bl);
cap_size = bl.length();
}
{
bufferlist bl;
snaprealm_reconnect_t sr;
encode(sr, bl);
realm_size = bl.length();
}
}
public:
std::string_view get_type_name() const override { return "client_reconnect"; }
void print(ostream& out) const override {
out << "client_reconnect("
<< caps.size() << " caps " << realms.size() << " realms )";
}
// Force to use old encoding.
// Use connection's features to choose encoding if version is set to 0.
void set_encoding_version(int v) {
header.version = v;
if (v <= 3)
header.compat_version = 0;
}
size_t get_approx_size() {
return approx_size;
}
void mark_more() { more = true; }
bool has_more() const { return more; }
void add_cap(inodeno_t ino, uint64_t cap_id, inodeno_t pathbase, const string& path,
int wanted, int issued, inodeno_t sr, snapid_t sf, bufferlist& lb)
{
caps[ino] = cap_reconnect_t(cap_id, pathbase, path, wanted, issued, sr, sf, lb);
if (!cap_size)
calc_item_size();
approx_size += cap_size + path.length() + lb.length();
}
void add_snaprealm(inodeno_t ino, snapid_t seq, inodeno_t parent) {
snaprealm_reconnect_t r;
r.realm.ino = ino;
r.realm.seq = seq;
r.realm.parent = parent;
realms.push_back(r);
if (!realm_size)
calc_item_size();
approx_size += realm_size;
}
void encode_payload(uint64_t features) override {
if (header.version == 0) {
if (features & CEPH_FEATURE_MDSENC)
header.version = 3;
else if (features & CEPH_FEATURE_FLOCK)
header.version = 2;
else
header.version = 1;
}
using ceph::encode;
data.clear();
if (header.version >= 4) {
encode(caps, data);
encode(realms, data);
encode(more, data);
} else {
// compat crap
if (header.version == 3) {
encode(caps, data);
} else if (header.version == 2) {
__u32 n = caps.size();
encode(n, data);
for (auto& p : caps) {
encode(p.first, data);
p.second.encode_old(data);
}
} else {
map<inodeno_t, old_cap_reconnect_t> ocaps;
for (auto& p : caps) {
ocaps[p.first] = p.second;
encode(ocaps, data);
}
for (auto& r : realms)
r.encode_old(data);
}
}
}
void decode_payload() override {
auto p = data.cbegin();
if (header.version >= 4) {
decode(caps, p);
decode(realms, p);
if (header.version >= 5)
decode(more, p);
} else {
// compat crap
if (header.version == 3) {
decode(caps, p);
} else if (header.version == 2) {
__u32 n;
decode(n, p);
inodeno_t ino;
while (n--) {
decode(ino, p);
caps[ino].decode_old(p);
}
} else {
map<inodeno_t, old_cap_reconnect_t> ocaps;
decode(ocaps, p);
for (auto &q : ocaps)
caps[q.first] = q.second;
}
while (!p.end()) {
realms.push_back(snaprealm_reconnect_t());
realms.back().decode_old(p);
}
}
}
};
#endif
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