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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_MCACHEEXPIRE_H
#define CEPH_MCACHEEXPIRE_H
#include <string_view>
#include "mds/mdstypes.h"
#include "messages/MMDSOp.h"
class MCacheExpire final : public MMDSOp {
private:
__s32 from;
public:
/*
group things by realm (auth delgation root), since that's how auth is determined.
that makes it less work to process when exports are in progress.
*/
struct realm {
std::map<vinodeno_t, uint32_t> inodes;
std::map<dirfrag_t, uint32_t> dirs;
std::map<dirfrag_t, std::map<std::pair<std::string,snapid_t>,uint32_t> > dentries;
void merge(const realm& o) {
inodes.insert(o.inodes.begin(), o.inodes.end());
dirs.insert(o.dirs.begin(), o.dirs.end());
for (const auto &p : o.dentries) {
auto em = dentries.emplace(std::piecewise_construct, std::forward_as_tuple(p.first), std::forward_as_tuple(p.second));
if (!em.second) {
em.first->second.insert(p.second.begin(), p.second.end());
}
}
}
void encode(ceph::buffer::list &bl) const {
using ceph::encode;
encode(inodes, bl);
encode(dirs, bl);
encode(dentries, bl);
}
void decode(ceph::buffer::list::const_iterator &bl) {
using ceph::decode;
decode(inodes, bl);
decode(dirs, bl);
decode(dentries, bl);
}
};
WRITE_CLASS_ENCODER(realm)
std::map<dirfrag_t, realm> realms;
int get_from() const { return from; }
protected:
MCacheExpire() : MMDSOp{MSG_MDS_CACHEEXPIRE}, from(-1) {}
MCacheExpire(int f) :
MMDSOp{MSG_MDS_CACHEEXPIRE},
from(f) { }
~MCacheExpire() final {}
public:
std::string_view get_type_name() const override { return "cache_expire";}
void add_inode(dirfrag_t r, vinodeno_t vino, unsigned nonce) {
realms[r].inodes[vino] = nonce;
}
void add_dir(dirfrag_t r, dirfrag_t df, unsigned nonce) {
realms[r].dirs[df] = nonce;
}
void add_dentry(dirfrag_t r, dirfrag_t df, std::string_view dn, snapid_t last, unsigned nonce) {
realms[r].dentries[df][std::pair<std::string,snapid_t>(dn,last)] = nonce;
}
void add_realm(dirfrag_t df, const realm& r) {
auto em = realms.emplace(std::piecewise_construct, std::forward_as_tuple(df), std::forward_as_tuple(r));
if (!em.second) {
em.first->second.merge(r);
}
}
void decode_payload() override {
using ceph::decode;
auto p = payload.cbegin();
decode(from, p);
decode(realms, p);
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(from, payload);
encode(realms, payload);
}
private:
template<class T, typename... Args>
friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
};
WRITE_CLASS_ENCODER(MCacheExpire::realm)
#endif
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