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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_MDISCOVER_H
#define CEPH_MDISCOVER_H
#include "include/filepath.h"
#include "messages/MMDSOp.h"
#include <string>
class MDiscover final : public MMDSOp {
private:
static constexpr int HEAD_VERSION = 1;
static constexpr int COMPAT_VERSION = 1;
inodeno_t base_ino; // 1 -> root
frag_t base_dir_frag;
snapid_t snapid;
filepath want; // ... [/]need/this/stuff
bool want_base_dir = true;
bool path_locked = false;
public:
inodeno_t get_base_ino() const { return base_ino; }
frag_t get_base_dir_frag() const { return base_dir_frag; }
snapid_t get_snapid() const { return snapid; }
const filepath& get_want() const { return want; }
const std::string& get_dentry(int n) const { return want[n]; }
bool wants_base_dir() const { return want_base_dir; }
bool is_path_locked() const { return path_locked; }
void set_base_dir_frag(frag_t f) { base_dir_frag = f; }
protected:
MDiscover() : MMDSOp(MSG_MDS_DISCOVER, HEAD_VERSION, COMPAT_VERSION) { }
MDiscover(inodeno_t base_ino_,
frag_t base_frag_,
snapid_t s,
filepath& want_path_,
bool want_base_dir_ = true,
bool path_locked_ = false) :
MMDSOp{MSG_MDS_DISCOVER},
base_ino(base_ino_),
base_dir_frag(base_frag_),
snapid(s),
want(want_path_),
want_base_dir(want_base_dir_),
path_locked(path_locked_) { }
~MDiscover() final {}
public:
std::string_view get_type_name() const override { return "Dis"; }
void print(std::ostream &out) const override {
out << "discover(" << header.tid << " " << base_ino << "." << base_dir_frag
<< " " << want << ")";
}
void decode_payload() override {
using ceph::decode;
auto p = payload.cbegin();
decode(base_ino, p);
decode(base_dir_frag, p);
decode(snapid, p);
decode(want, p);
decode(want_base_dir, p);
decode(path_locked, p);
}
void encode_payload(uint64_t features) override {
using ceph::encode;
encode(base_ino, payload);
encode(base_dir_frag, payload);
encode(snapid, payload);
encode(want, payload);
encode(want_base_dir, payload);
encode(path_locked, payload);
}
private:
template<class T, typename... Args>
friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
template<class T, typename... Args>
friend MURef<T> crimson::make_message(Args&&... args);
};
#endif
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