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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) 2018 Red Hat
*
* 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_ANCHOR_H
#define CEPH_ANCHOR_H
#include <string>
#include "include/types.h"
#include "mdstypes.h"
#include "include/buffer.h"
/*
* Anchor represents primary linkage of an inode. When adding inode to an
* anchor table, MDS ensures that the table also contains inode's ancestor
* inodes. MDS can get inode's path by looking up anchor table recursively.
*/
class Anchor {
public:
Anchor() {}
Anchor(inodeno_t i, inodeno_t di, std::string_view str, __u8 tp) :
ino(i), dirino(di), d_name(str), d_type(tp) {}
void encode(bufferlist &bl) const;
void decode(bufferlist::const_iterator &bl);
void dump(Formatter *f) const;
static void generate_test_instances(std::list<Anchor*>& ls);
bool operator==(const Anchor &r) const {
return ino == r.ino && dirino == r.dirino &&
d_name == r.d_name && d_type == r.d_type &&
frags == r.frags;
}
inodeno_t ino; // anchored ino
inodeno_t dirino;
std::string d_name;
__u8 d_type = 0;
std::set<frag_t> frags;
int omap_idx = -1; // stored in which omap object
};
WRITE_CLASS_ENCODER(Anchor)
class RecoveredAnchor : public Anchor {
public:
RecoveredAnchor() {}
mds_rank_t auth = MDS_RANK_NONE; // auth hint
};
class OpenedAnchor : public Anchor {
public:
OpenedAnchor(inodeno_t i, inodeno_t di, std::string_view str, __u8 tp, int nr) :
Anchor(i, di, str, tp),
nref(nr)
{}
mutable int nref = 0; // how many children
};
std::ostream& operator<<(std::ostream& out, const Anchor &a);
#endif
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