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.
15 #ifndef CEPH_LOGEVENT_H
16 #define CEPH_LOGEVENT_H
18 #define EVENT_NEW_ENCODING 0 // indicates that the encoding is versioned
19 #define EVENT_UNUSED 1 // was previously EVENT_STRING
21 #define EVENT_SUBTREEMAP 2
22 #define EVENT_EXPORT 3
23 #define EVENT_IMPORTSTART 4
24 #define EVENT_IMPORTFINISH 5
25 #define EVENT_FRAGMENT 6
27 #define EVENT_RESETJOURNAL 9
29 #define EVENT_SESSION 10
30 #define EVENT_SESSIONS_OLD 11
31 #define EVENT_SESSIONS 12
33 #define EVENT_UPDATE 20
34 #define EVENT_SLAVEUPDATE 21
36 #define EVENT_COMMITTED 23
38 #define EVENT_TABLECLIENT 42
39 #define EVENT_TABLESERVER 43
41 #define EVENT_SUBTREEMAP_TEST 50
45 #include "include/buffer_fwd.h"
46 #include "include/Context.h"
47 #include "include/utime.h"
56 typedef __u32 EventType;
61 static LogEvent *decode_event(bufferlist& bl, bufferlist::iterator& p, EventType type);
71 explicit LogEvent(int t)
72 : _type(t), _start_off(0), _segment(0) { }
73 virtual ~LogEvent() { }
75 string get_type_str() const;
76 static EventType str_to_type(std::string const &str);
77 EventType get_type() const { return _type; }
78 void set_type(EventType t) { _type = t; }
80 uint64_t get_start_off() const { return _start_off; }
81 void set_start_off(uint64_t o) { _start_off = o; }
83 utime_t get_stamp() const { return stamp; }
84 void set_stamp(utime_t t) { stamp = t; }
87 virtual void encode(bufferlist& bl, uint64_t features) const = 0;
88 virtual void decode(bufferlist::iterator &bl) = 0;
89 static LogEvent *decode(bufferlist &bl);
90 virtual void dump(Formatter *f) const = 0;
92 void encode_with_header(bufferlist& bl, uint64_t features) {
93 ::encode(EVENT_NEW_ENCODING, bl);
94 ENCODE_START(1, 1, bl)
100 virtual void print(ostream& out) const {
101 out << "event(" << _type << ")";
104 /*** live journal ***/
105 /* update_segment() - adjust any state we need to in the LogSegment
107 virtual void update_segment() { }
110 /* replay() - replay given event. this is idempotent.
112 virtual void replay(MDSRank *m) { ceph_abort(); }
115 * If the subclass embeds a MetaBlob, return it here so that
116 * tools can examine metablobs while traversing lists of LogEvent.
118 virtual EMetaBlob *get_metablob() { return NULL; }
121 inline ostream& operator<<(ostream& out, const LogEvent &le) {