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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_INOTABLE_H
#define CEPH_INOTABLE_H
#include "MDSTable.h"
#include "include/interval_set.h"
class MDSRank;
class InoTable : public MDSTable {
interval_set<inodeno_t> free; // unused ids
interval_set<inodeno_t> projected_free;
public:
explicit InoTable(MDSRank *m) : MDSTable(m, "inotable", true) { }
inodeno_t project_alloc_id(inodeno_t id=0);
void apply_alloc_id(inodeno_t id);
void project_alloc_ids(interval_set<inodeno_t>& inos, int want);
void apply_alloc_ids(interval_set<inodeno_t>& inos);
void project_release_ids(interval_set<inodeno_t>& inos);
void apply_release_ids(interval_set<inodeno_t>& inos);
void replay_alloc_id(inodeno_t ino);
void replay_alloc_ids(interval_set<inodeno_t>& inos);
void replay_release_ids(interval_set<inodeno_t>& inos);
void replay_reset();
bool repair(inodeno_t id);
bool is_marked_free(inodeno_t id) const;
bool intersects_free(
const interval_set<inodeno_t> &other,
interval_set<inodeno_t> *intersection);
void reset_state() override;
void encode_state(bufferlist& bl) const override {
ENCODE_START(2, 2, bl);
encode(free, bl);
ENCODE_FINISH(bl);
}
void decode_state(bufferlist::const_iterator& bl) override {
DECODE_START_LEGACY_COMPAT_LEN(2, 2, 2, bl);
decode(free, bl);
projected_free = free;
DECODE_FINISH(bl);
}
// To permit enc/decoding in isolation in dencoder
InoTable() : MDSTable(NULL, "inotable", true) {}
void encode(bufferlist& bl) const {
encode_state(bl);
}
void decode(bufferlist::const_iterator& bl) {
decode_state(bl);
}
void dump(Formatter *f) const;
static void generate_test_instances(list<InoTable*>& ls);
void skip_inos(inodeno_t i);
/**
* If the specified inode is marked as free, mark it as used.
* For use in tools, not normal operations.
*
* @returns true if the inode was previously marked as free
*/
bool force_consume(inodeno_t ino)
{
if (free.contains(ino)) {
free.erase(ino);
return true;
} else {
return false;
}
}
/**
* If this ino is in this rank's range, consume up to and including it.
* For use in tools, when we know the max ino in use and want to make
* sure we're only allocating new inodes from above it.
*
* @return true if the table was modified
*/
bool force_consume_to(inodeno_t ino);
};
WRITE_CLASS_ENCODER(InoTable)
#endif
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