initial code repo

[stor4nfv.git] / src / ceph / src / mds / LogEvent.cc

diff --git a/src/ceph/src/mds/LogEvent.cc b/src/ceph/src/mds/LogEvent.cc
new file mode 100644 (file)
index 0000000..90d84de
--- /dev/null
+++ b/src/ceph/src/mds/LogEvent.cc
@@ -0,0 +1,180 @@
+// -*- 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.
+ * 
+ */
+
+#include "common/config.h"
+#include "LogEvent.h"
+
+#include "MDSRank.h"
+
+// events i know of
+#include "events/ESubtreeMap.h"
+#include "events/EExport.h"
+#include "events/EImportStart.h"
+#include "events/EImportFinish.h"
+#include "events/EFragment.h"
+
+#include "events/EResetJournal.h"
+#include "events/ESession.h"
+#include "events/ESessions.h"
+
+#include "events/EUpdate.h"
+#include "events/ESlaveUpdate.h"
+#include "events/EOpen.h"
+#include "events/ECommitted.h"
+
+#include "events/ETableClient.h"
+#include "events/ETableServer.h"
+
+#include "events/ENoOp.h"
+
+#define dout_context g_ceph_context
+
+
+LogEvent *LogEvent::decode(bufferlist& bl)
+{
+  // parse type, length
+  bufferlist::iterator p = bl.begin();
+  EventType type;
+  LogEvent *event = NULL;
+  ::decode(type, p);
+
+  if (EVENT_NEW_ENCODING == type) {
+    try {
+      DECODE_START(1, p);
+      ::decode(type, p);
+      event = decode_event(bl, p, type);
+      DECODE_FINISH(p);
+    }
+    catch (const buffer::error &e) {
+      generic_dout(0) << "failed to decode LogEvent (type maybe " << type << ")" << dendl;
+      return NULL;
+    }
+  } else { // we are using classic encoding
+    event = decode_event(bl, p, type);
+  }
+  return event;
+}
+
+
+std::string LogEvent::get_type_str() const
+{
+  switch(_type) {
+  case EVENT_SUBTREEMAP: return "SUBTREEMAP";
+  case EVENT_SUBTREEMAP_TEST: return "SUBTREEMAP_TEST";
+  case EVENT_EXPORT: return "EXPORT";
+  case EVENT_IMPORTSTART: return "IMPORTSTART";
+  case EVENT_IMPORTFINISH: return "IMPORTFINISH";
+  case EVENT_FRAGMENT: return "FRAGMENT";
+  case EVENT_RESETJOURNAL: return "RESETJOURNAL";
+  case EVENT_SESSION: return "SESSION";
+  case EVENT_SESSIONS_OLD: return "SESSIONS_OLD";
+  case EVENT_SESSIONS: return "SESSIONS";
+  case EVENT_UPDATE: return "UPDATE";
+  case EVENT_SLAVEUPDATE: return "SLAVEUPDATE";
+  case EVENT_OPEN: return "OPEN";
+  case EVENT_COMMITTED: return "COMMITTED";
+  case EVENT_TABLECLIENT: return "TABLECLIENT";
+  case EVENT_TABLESERVER: return "TABLESERVER";
+  case EVENT_NOOP: return "NOOP";
+
+  default:
+    generic_dout(0) << "get_type_str: unknown type " << _type << dendl;
+    return "UNKNOWN";
+  }
+}
+
+
+/*
+ * Resolve type string to type enum
+ *
+ * Return -1 if not found
+ */
+LogEvent::EventType LogEvent::str_to_type(std::string const &str)
+{
+  std::map<std::string, EventType> types;
+  types["SUBTREEMAP"] = EVENT_SUBTREEMAP;
+  types["SUBTREEMAP_TEST"] = EVENT_SUBTREEMAP_TEST;
+  types["EXPORT"] = EVENT_EXPORT;
+  types["IMPORTSTART"] = EVENT_IMPORTSTART;
+  types["IMPORTFINISH"] = EVENT_IMPORTFINISH;
+  types["FRAGMENT"] = EVENT_FRAGMENT;
+  types["RESETJOURNAL"] = EVENT_RESETJOURNAL;
+  types["SESSION"] = EVENT_SESSION;
+  types["SESSIONS_OLD"] = EVENT_SESSIONS_OLD;
+  types["SESSIONS"] = EVENT_SESSIONS;
+  types["UPDATE"] = EVENT_UPDATE;
+  types["SLAVEUPDATE"] = EVENT_SLAVEUPDATE;
+  types["OPEN"] = EVENT_OPEN;
+  types["COMMITTED"] = EVENT_COMMITTED;
+  types["TABLECLIENT"] = EVENT_TABLECLIENT;
+  types["TABLESERVER"] = EVENT_TABLESERVER;
+  types["NOOP"] = EVENT_NOOP;
+
+  return types[str];
+}
+
+
+LogEvent *LogEvent::decode_event(bufferlist& bl, bufferlist::iterator& p, LogEvent::EventType type)
+{
+  int length = bl.length() - p.get_off();
+  generic_dout(15) << "decode_log_event type " << type << ", size " << length << dendl;
+  
+  // create event
+  LogEvent *le;
+  switch (type) {
+  case EVENT_SUBTREEMAP: le = new ESubtreeMap; break;
+  case EVENT_SUBTREEMAP_TEST: 
+    le = new ESubtreeMap;
+    le->set_type(type);
+    break;
+  case EVENT_EXPORT: le = new EExport; break;
+  case EVENT_IMPORTSTART: le = new EImportStart; break;
+  case EVENT_IMPORTFINISH: le = new EImportFinish; break;
+  case EVENT_FRAGMENT: le = new EFragment; break;
+
+  case EVENT_RESETJOURNAL: le = new EResetJournal; break;
+
+  case EVENT_SESSION: le = new ESession; break;
+  case EVENT_SESSIONS_OLD: le = new ESessions; (static_cast<ESessions *>(le))->mark_old_encoding(); break;
+  case EVENT_SESSIONS: le = new ESessions; break;
+
+  case EVENT_UPDATE: le = new EUpdate; break;
+  case EVENT_SLAVEUPDATE: le = new ESlaveUpdate; break;
+  case EVENT_OPEN: le = new EOpen; break;
+  case EVENT_COMMITTED: le = new ECommitted; break;
+
+  case EVENT_TABLECLIENT: le = new ETableClient; break;
+  case EVENT_TABLESERVER: le = new ETableServer; break;
+
+  case EVENT_NOOP: le = new ENoOp; break;
+
+  default:
+    generic_dout(0) << "uh oh, unknown log event type " << type << " length " << length << dendl;
+    return NULL;
+  }
+
+  // decode
+  try {
+    le->decode(p);
+  }
+  catch (const buffer::error &e) {
+    generic_dout(0) << "failed to decode LogEvent type " << type << dendl;
+    delete le;
+    return NULL;
+  }
+
+  assert(p.end());
+  return le;
+}
+