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1 | // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- |
2 | // vim: ts=8 sw=2 smarttab | |
3 | /* | |
4 | * Ceph - scalable distributed file system | |
5 | * | |
6 | * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net> | |
7 | * | |
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. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "common/config.h" | |
16 | #include "LogEvent.h" | |
17 | ||
18 | #include "MDSRank.h" | |
19 | ||
20 | // events i know of | |
21 | #include "events/ESubtreeMap.h" | |
22 | #include "events/EExport.h" | |
23 | #include "events/EImportStart.h" | |
24 | #include "events/EImportFinish.h" | |
25 | #include "events/EFragment.h" | |
26 | ||
27 | #include "events/EResetJournal.h" | |
28 | #include "events/ESession.h" | |
29 | #include "events/ESessions.h" | |
30 | ||
31 | #include "events/EUpdate.h" | |
32 | #include "events/ESlaveUpdate.h" | |
33 | #include "events/EOpen.h" | |
34 | #include "events/ECommitted.h" | |
35 | ||
36 | #include "events/ETableClient.h" | |
37 | #include "events/ETableServer.h" | |
38 | ||
39 | #include "events/ENoOp.h" | |
40 | ||
41 | #define dout_context g_ceph_context | |
42 | ||
43 | ||
44 | LogEvent *LogEvent::decode(bufferlist& bl) | |
45 | { | |
46 | // parse type, length | |
47 | bufferlist::iterator p = bl.begin(); | |
48 | EventType type; | |
49 | LogEvent *event = NULL; | |
50 | ::decode(type, p); | |
51 | ||
52 | if (EVENT_NEW_ENCODING == type) { | |
53 | try { | |
54 | DECODE_START(1, p); | |
55 | ::decode(type, p); | |
56 | event = decode_event(bl, p, type); | |
57 | DECODE_FINISH(p); | |
58 | } | |
59 | catch (const buffer::error &e) { | |
60 | generic_dout(0) << "failed to decode LogEvent (type maybe " << type << ")" << dendl; | |
61 | return NULL; | |
62 | } | |
63 | } else { // we are using classic encoding | |
64 | event = decode_event(bl, p, type); | |
65 | } | |
66 | return event; | |
67 | } | |
68 | ||
69 | ||
70 | std::string LogEvent::get_type_str() const | |
71 | { | |
72 | switch(_type) { | |
73 | case EVENT_SUBTREEMAP: return "SUBTREEMAP"; | |
74 | case EVENT_SUBTREEMAP_TEST: return "SUBTREEMAP_TEST"; | |
75 | case EVENT_EXPORT: return "EXPORT"; | |
76 | case EVENT_IMPORTSTART: return "IMPORTSTART"; | |
77 | case EVENT_IMPORTFINISH: return "IMPORTFINISH"; | |
78 | case EVENT_FRAGMENT: return "FRAGMENT"; | |
79 | case EVENT_RESETJOURNAL: return "RESETJOURNAL"; | |
80 | case EVENT_SESSION: return "SESSION"; | |
81 | case EVENT_SESSIONS_OLD: return "SESSIONS_OLD"; | |
82 | case EVENT_SESSIONS: return "SESSIONS"; | |
83 | case EVENT_UPDATE: return "UPDATE"; | |
84 | case EVENT_SLAVEUPDATE: return "SLAVEUPDATE"; | |
85 | case EVENT_OPEN: return "OPEN"; | |
86 | case EVENT_COMMITTED: return "COMMITTED"; | |
87 | case EVENT_TABLECLIENT: return "TABLECLIENT"; | |
88 | case EVENT_TABLESERVER: return "TABLESERVER"; | |
89 | case EVENT_NOOP: return "NOOP"; | |
90 | ||
91 | default: | |
92 | generic_dout(0) << "get_type_str: unknown type " << _type << dendl; | |
93 | return "UNKNOWN"; | |
94 | } | |
95 | } | |
96 | ||
97 | ||
98 | /* | |
99 | * Resolve type string to type enum | |
100 | * | |
101 | * Return -1 if not found | |
102 | */ | |
103 | LogEvent::EventType LogEvent::str_to_type(std::string const &str) | |
104 | { | |
105 | std::map<std::string, EventType> types; | |
106 | types["SUBTREEMAP"] = EVENT_SUBTREEMAP; | |
107 | types["SUBTREEMAP_TEST"] = EVENT_SUBTREEMAP_TEST; | |
108 | types["EXPORT"] = EVENT_EXPORT; | |
109 | types["IMPORTSTART"] = EVENT_IMPORTSTART; | |
110 | types["IMPORTFINISH"] = EVENT_IMPORTFINISH; | |
111 | types["FRAGMENT"] = EVENT_FRAGMENT; | |
112 | types["RESETJOURNAL"] = EVENT_RESETJOURNAL; | |
113 | types["SESSION"] = EVENT_SESSION; | |
114 | types["SESSIONS_OLD"] = EVENT_SESSIONS_OLD; | |
115 | types["SESSIONS"] = EVENT_SESSIONS; | |
116 | types["UPDATE"] = EVENT_UPDATE; | |
117 | types["SLAVEUPDATE"] = EVENT_SLAVEUPDATE; | |
118 | types["OPEN"] = EVENT_OPEN; | |
119 | types["COMMITTED"] = EVENT_COMMITTED; | |
120 | types["TABLECLIENT"] = EVENT_TABLECLIENT; | |
121 | types["TABLESERVER"] = EVENT_TABLESERVER; | |
122 | types["NOOP"] = EVENT_NOOP; | |
123 | ||
124 | return types[str]; | |
125 | } | |
126 | ||
127 | ||
128 | LogEvent *LogEvent::decode_event(bufferlist& bl, bufferlist::iterator& p, LogEvent::EventType type) | |
129 | { | |
130 | int length = bl.length() - p.get_off(); | |
131 | generic_dout(15) << "decode_log_event type " << type << ", size " << length << dendl; | |
132 | ||
133 | // create event | |
134 | LogEvent *le; | |
135 | switch (type) { | |
136 | case EVENT_SUBTREEMAP: le = new ESubtreeMap; break; | |
137 | case EVENT_SUBTREEMAP_TEST: | |
138 | le = new ESubtreeMap; | |
139 | le->set_type(type); | |
140 | break; | |
141 | case EVENT_EXPORT: le = new EExport; break; | |
142 | case EVENT_IMPORTSTART: le = new EImportStart; break; | |
143 | case EVENT_IMPORTFINISH: le = new EImportFinish; break; | |
144 | case EVENT_FRAGMENT: le = new EFragment; break; | |
145 | ||
146 | case EVENT_RESETJOURNAL: le = new EResetJournal; break; | |
147 | ||
148 | case EVENT_SESSION: le = new ESession; break; | |
149 | case EVENT_SESSIONS_OLD: le = new ESessions; (static_cast<ESessions *>(le))->mark_old_encoding(); break; | |
150 | case EVENT_SESSIONS: le = new ESessions; break; | |
151 | ||
152 | case EVENT_UPDATE: le = new EUpdate; break; | |
153 | case EVENT_SLAVEUPDATE: le = new ESlaveUpdate; break; | |
154 | case EVENT_OPEN: le = new EOpen; break; | |
155 | case EVENT_COMMITTED: le = new ECommitted; break; | |
156 | ||
157 | case EVENT_TABLECLIENT: le = new ETableClient; break; | |
158 | case EVENT_TABLESERVER: le = new ETableServer; break; | |
159 | ||
160 | case EVENT_NOOP: le = new ENoOp; break; | |
161 | ||
162 | default: | |
163 | generic_dout(0) << "uh oh, unknown log event type " << type << " length " << length << dendl; | |
164 | return NULL; | |
165 | } | |
166 | ||
167 | // decode | |
168 | try { | |
169 | le->decode(p); | |
170 | } | |
171 | catch (const buffer::error &e) { | |
172 | generic_dout(0) << "failed to decode LogEvent type " << type << dendl; | |
173 | delete le; | |
174 | return NULL; | |
175 | } | |
176 | ||
177 | assert(p.end()); | |
178 | return le; | |
179 | } | |
180 |