1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 * Ceph - scalable distributed file system
6 * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
8 * This is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License version 2.1, as published by the Free Software
11 * Foundation. See file COPYING.
16 #ifndef JOURNAL_POINTER_H
17 #define JOURNAL_POINTER_H
19 #include "include/encoding.h"
25 // This always lives in the same location for a given MDS
26 // instance, it tells the daemon where to look for the journal.
27 class JournalPointer {
33 std::string get_object_id() const;
36 // The currently active journal
38 // The backup journal, if any (may be 0)
41 void encode(bufferlist &bl) const {
42 ENCODE_START(1, 1, bl);
48 void decode(bufferlist::iterator &bl) {
55 JournalPointer(int node_id_, int64_t pool_id_) : node_id(node_id_), pool_id(pool_id_),
58 JournalPointer() : node_id(-1), pool_id(-1), front(0), back(0) {}
60 int load(Objecter *objecter);
61 int save(Objecter *objecter) const;
62 void save(Objecter *objecter, Context *completion) const;
64 bool is_null() const {
65 return front == 0 && back == 0;
68 void dump(Formatter *f) const {
69 f->open_object_section("journal_pointer");
71 f->dump_unsigned("front", front);
72 f->dump_unsigned("back", back);
74 f->close_section(); // journal_header
77 static void generate_test_instances(std::list<JournalPointer*> &ls)
79 ls.push_back(new JournalPointer());
80 ls.push_back(new JournalPointer());
81 ls.back()->front = 0xdeadbeef;
82 ls.back()->back = 0xfeedbead;
85 WRITE_CLASS_ENCODER(JournalPointer)
87 #endif // JOURNAL_POINTER_H