backup.cpp

mysql-5.0.24源码包

Backup::execINCL_NODEREQ(Signal* signal)
{
  jamEntry();
  
  const Uint32 senderRef = signal->theData[0];
  const Uint32 inclNode  = signal->theData[1];

  NodePtr node;
  for(c_nodes.first(node); node.i != RNIL; c_nodes.next(node)) {
    jam();
    const Uint32 nodeId = node.p->nodeId;
    if(inclNode == nodeId){
      jam();
      
      ndbrequire(node.p->alive == 0);
      ndbrequire(!c_aliveNodes.get(nodeId));
      
      node.p->alive = 1;
      c_aliveNodes.set(nodeId);
      
      break;
    }//if
  }//for
  signal->theData[0] = reference();
  sendSignal(senderRef, GSN_INCL_NODECONF, signal, 1, JBB);
}

/*****************************************************************************
 * 
 * Master functionallity - Define backup
 *
 *****************************************************************************/

void
Backup::execBACKUP_REQ(Signal* signal)
{
  jamEntry();
  BackupReq * req = (BackupReq*)signal->getDataPtr();
  
  const Uint32 senderData = req->senderData;
  const BlockReference senderRef = signal->senderBlockRef();
  const Uint32 dataLen32 = req->backupDataLen; // In 32 bit words
  const Uint32 flags = signal->getLength() > 2 ? req->flags : 2;

  if(getOwnNodeId() != getMasterNodeId()) {
    jam();
    sendBackupRef(senderRef, flags, signal, senderData, BackupRef::IAmNotMaster);
    return;
  }//if

  if (m_diskless)
  {
    sendBackupRef(senderRef, flags, signal, senderData, 
		  BackupRef::CannotBackupDiskless);
    return;
  }
  
  if(dataLen32 != 0) {
    jam();
    sendBackupRef(senderRef, flags, signal, senderData, 
		  BackupRef::BackupDefinitionNotImplemented);
    return;
  }//if
  
#ifdef DEBUG_ABORT
  dumpUsedResources();
#endif
  /**
   * Seize a backup record
   */
  BackupRecordPtr ptr;
  c_backups.seize(ptr);
  if(ptr.i == RNIL) {
    jam();
    sendBackupRef(senderRef, flags, signal, senderData, BackupRef::OutOfBackupRecord);
    return;
  }//if

  ndbrequire(ptr.p->pages.empty());
  ndbrequire(ptr.p->tables.isEmpty());
  
  ptr.p->m_gsn = 0;
  ptr.p->errorCode = 0;
  ptr.p->clientRef = senderRef;
  ptr.p->clientData = senderData;
  ptr.p->flags = flags;
  ptr.p->masterRef = reference();
  ptr.p->nodes = c_aliveNodes;
  ptr.p->backupId = 0;
  ptr.p->backupKey[0] = 0;
  ptr.p->backupKey[1] = 0;
  ptr.p->backupDataLen = 0;
  ptr.p->masterData.errorCode = 0;
  ptr.p->masterData.dropTrig.tableId = RNIL;
  ptr.p->masterData.alterTrig.tableId = RNIL;
  
  UtilSequenceReq * utilReq = (UtilSequenceReq*)signal->getDataPtrSend();
    
  ptr.p->masterData.gsn = GSN_UTIL_SEQUENCE_REQ;
  utilReq->senderData  = ptr.i;
  utilReq->sequenceId  = BACKUP_SEQUENCE;
  utilReq->requestType = UtilSequenceReq::NextVal;
  sendSignal(DBUTIL_REF, GSN_UTIL_SEQUENCE_REQ, 
	     signal, UtilSequenceReq::SignalLength, JBB);
}

void
Backup::execUTIL_SEQUENCE_REF(Signal* signal)
{
  BackupRecordPtr ptr;
  jamEntry();
  UtilSequenceRef * utilRef = (UtilSequenceRef*)signal->getDataPtr();
  ptr.i = utilRef->senderData;
  c_backupPool.getPtr(ptr);
  ndbrequire(ptr.p->masterData.gsn == GSN_UTIL_SEQUENCE_REQ);
  sendBackupRef(signal, ptr, BackupRef::SequenceFailure);
}//execUTIL_SEQUENCE_REF()


void
Backup::sendBackupRef(Signal* signal, BackupRecordPtr ptr, Uint32 errorCode)
{
  jam();
  sendBackupRef(ptr.p->clientRef, ptr.p->flags, signal, ptr.p->clientData, errorCode);
  cleanup(signal, ptr);
}

void
Backup::sendBackupRef(BlockReference senderRef, Uint32 flags, Signal *signal,
		      Uint32 senderData, Uint32 errorCode)
{
  jam();
  if (SEND_BACKUP_STARTED_FLAG(flags))
  {
    BackupRef* ref = (BackupRef*)signal->getDataPtrSend();
    ref->senderData = senderData;
    ref->errorCode = errorCode;
    ref->masterRef = numberToRef(BACKUP, getMasterNodeId());
    sendSignal(senderRef, GSN_BACKUP_REF, signal, BackupRef::SignalLength, JBB);
  }

  if(errorCode != BackupRef::IAmNotMaster){
    signal->theData[0] = NDB_LE_BackupFailedToStart;
    signal->theData[1] = senderRef;
    signal->theData[2] = errorCode;
    sendSignal(CMVMI_REF, GSN_EVENT_REP, signal, 3, JBB);
  }
}

void
Backup::execUTIL_SEQUENCE_CONF(Signal* signal)
{
  jamEntry();

  UtilSequenceConf * conf = (UtilSequenceConf*)signal->getDataPtr();
  
  if(conf->requestType == UtilSequenceReq::Create) 
  {
    jam();
    sendSTTORRY(signal); // At startup in NDB
    return;
  }

  BackupRecordPtr ptr;
  ptr.i = conf->senderData;
  c_backupPool.getPtr(ptr);

  ndbrequire(ptr.p->masterData.gsn == GSN_UTIL_SEQUENCE_REQ);

  if (ptr.p->checkError())
  {
    jam();
    sendBackupRef(signal, ptr, ptr.p->errorCode);
    return;
  }//if

  if (ERROR_INSERTED(10023)) 
  {
    sendBackupRef(signal, ptr, 323);
    return;
  }//if


  {
    Uint64 backupId;
    memcpy(&backupId,conf->sequenceValue,8);
    ptr.p->backupId= (Uint32)backupId;
  }
  ptr.p->backupKey[0] = (getOwnNodeId() << 16) | (ptr.p->backupId & 0xFFFF);
  ptr.p->backupKey[1] = NdbTick_CurrentMillisecond();

  ptr.p->masterData.gsn = GSN_UTIL_LOCK_REQ;
  Mutex mutex(signal, c_mutexMgr, ptr.p->masterData.m_defineBackupMutex);
  Callback c = { safe_cast(&Backup::defineBackupMutex_locked), ptr.i };
  ndbrequire(mutex.lock(c));

  return;
}

void
Backup::defineBackupMutex_locked(Signal* signal, Uint32 ptrI, Uint32 retVal){
  jamEntry();
  ndbrequire(retVal == 0);
  
  BackupRecordPtr ptr;
  ptr.i = ptrI;
  c_backupPool.getPtr(ptr);
  
  ndbrequire(ptr.p->masterData.gsn == GSN_UTIL_LOCK_REQ);

  ptr.p->masterData.gsn = GSN_UTIL_LOCK_REQ;
  Mutex mutex(signal, c_mutexMgr, ptr.p->masterData.m_dictCommitTableMutex);
  Callback c = { safe_cast(&Backup::dictCommitTableMutex_locked), ptr.i };
  ndbrequire(mutex.lock(c));
}

void
Backup::dictCommitTableMutex_locked(Signal* signal, Uint32 ptrI,Uint32 retVal)
{
  jamEntry();
  ndbrequire(retVal == 0);
  
  /**
   * We now have both the mutexes
   */
  BackupRecordPtr ptr;
  ptr.i = ptrI;
  c_backupPool.getPtr(ptr);

  ndbrequire(ptr.p->masterData.gsn == GSN_UTIL_LOCK_REQ);

  if (ERROR_INSERTED(10031)) {
    ptr.p->setErrorCode(331);
  }//if

  if (ptr.p->checkError())
  {
    jam();
    
    /**
     * Unlock mutexes
     */
    jam();
    Mutex mutex1(signal, c_mutexMgr, ptr.p->masterData.m_dictCommitTableMutex);
    jam();
    mutex1.unlock(); // ignore response
    
    jam();
    Mutex mutex2(signal, c_mutexMgr, ptr.p->masterData.m_defineBackupMutex);
    jam();
    mutex2.unlock(); // ignore response
    
    sendBackupRef(signal, ptr, ptr.p->errorCode);
    return;
  }//if
  
  sendDefineBackupReq(signal, ptr);
}

/*****************************************************************************
 * 
 * Master functionallity - Define backup cont'd (from now on all slaves are in)
 *
 *****************************************************************************/

bool
Backup::haveAllSignals(BackupRecordPtr ptr, Uint32 gsn, Uint32 nodeId)
{ 
  ndbrequire(ptr.p->masterRef == reference());
  ndbrequire(ptr.p->masterData.gsn == gsn);
  ndbrequire(!ptr.p->masterData.sendCounter.done());
  ndbrequire(ptr.p->masterData.sendCounter.isWaitingFor(nodeId));
  
  ptr.p->masterData.sendCounter.clearWaitingFor(nodeId);
  return ptr.p->masterData.sendCounter.done();
}

void
Backup::sendDefineBackupReq(Signal *signal, BackupRecordPtr ptr)
{
  /**
   * Sending define backup to all participants
   */
  DefineBackupReq * req = (DefineBackupReq*)signal->getDataPtrSend();
  req->backupId = ptr.p->backupId;
  req->clientRef = ptr.p->clientRef;
  req->clientData = ptr.p->clientData;
  req->senderRef = reference();
  req->backupPtr = ptr.i;
  req->backupKey[0] = ptr.p->backupKey[0];
  req->backupKey[1] = ptr.p->backupKey[1];
  req->nodes = ptr.p->nodes;
  req->backupDataLen = ptr.p->backupDataLen;
  req->flags = ptr.p->flags;
  
  ptr.p->masterData.gsn = GSN_DEFINE_BACKUP_REQ;
  ptr.p->masterData.sendCounter = ptr.p->nodes;
  NodeReceiverGroup rg(BACKUP, ptr.p->nodes);
  sendSignal(rg, GSN_DEFINE_BACKUP_REQ, signal, 
	     DefineBackupReq::SignalLength, JBB);
  
  /**
   * Now send backup data
   */
  const Uint32 len = ptr.p->backupDataLen;
  if(len == 0){
    /**
     * No data to send
     */
    jam();
    return;
  }//if
  
  /**
   * Not implemented
   */
  ndbrequire(0);
}

void
Backup::execDEFINE_BACKUP_REF(Signal* signal)
{
  jamEntry();

  DefineBackupRef* ref = (DefineBackupRef*)signal->getDataPtr();
  
  const Uint32 ptrI = ref->backupPtr;
  //const Uint32 backupId = ref->backupId;
  const Uint32 nodeId = ref->nodeId;
  
  BackupRecordPtr ptr;
  c_backupPool.getPtr(ptr, ptrI);
  
  ptr.p->setErrorCode(ref->errorCode);
  defineBackupReply(signal, ptr, nodeId);
}

void
Backup::execDEFINE_BACKUP_CONF(Signal* signal)
{
  jamEntry();

  DefineBackupConf* conf = (DefineBackupConf*)signal->getDataPtr();
  const Uint32 ptrI = conf->backupPtr;
  //const Uint32 backupId = conf->backupId;
  const Uint32 nodeId = refToNode(signal->senderBlockRef());

  BackupRecordPtr ptr;
  c_backupPool.getPtr(ptr, ptrI);

  if (ERROR_INSERTED(10024))
  {
    ptr.p->setErrorCode(324);
  }

  defineBackupReply(signal, ptr, nodeId);
}

void
Backup::defineBackupReply(Signal* signal, BackupRecordPtr ptr, Uint32 nodeId)
{
  if (!haveAllSignals(ptr, GSN_DEFINE_BACKUP_REQ, nodeId)) {
    jam();
    return;
  }

  /**
   * Unlock mutexes
   */
  jam();
  Mutex mutex1(signal, c_mutexMgr, ptr.p->masterData.m_dictCommitTableMutex);
  jam();
  mutex1.unlock(); // ignore response

  jam();
  Mutex mutex2(signal, c_mutexMgr, ptr.p->masterData.m_defineBackupMutex);
  jam();
  mutex2.unlock(); // ignore response

  if(ptr.p->checkError())
  {
    jam();
    masterAbort(signal, ptr);
    return;
  }
  
  /**
   * Reply to client
   */
  CRASH_INSERTION((10034));

  if (SEND_BACKUP_STARTED_FLAG(ptr.p->flags))
  {
    BackupConf * conf = (BackupConf*)signal->getDataPtrSend();
    conf->backupId = ptr.p->backupId;
    conf->senderData = ptr.p->clientData;
    conf->nodes = ptr.p->nodes;
    sendSignal(ptr.p->clientRef, GSN_BACKUP_CONF, signal, 
	       BackupConf::SignalLength, JBB);
  }

  signal->theData[0] = NDB_LE_BackupStarted;
  signal->theData[1] = ptr.p->clientRef;
  signal->theData[2] = ptr.p->backupId;
  ptr.p->nodes.copyto(NdbNodeBitmask::Size, signal->theData+3);
  sendSignal(CMVMI_REF, GSN_EVENT_REP, signal, 3+NdbNodeBitmask::Size, JBB);
  
  /**
   * Prepare Trig
   */
  TablePtr tabPtr;
  ndbrequire(ptr.p->tables.first(tabPtr));
  sendCreateTrig(signal, ptr, tabPtr);
}

/*****************************************************************************
 * 
 * Master functionallity - Prepare triggers
 *
 *****************************************************************************/
void
Backup::createAttributeMask(TablePtr tabPtr, 
			    Bitmask<MAXNROFATTRIBUTESINWORDS> & mask)
{
  mask.clear();
  Table & table = * tabPtr.p;
  for(Uint32 i = 0; i<table.noOfAttributes; i++) {
    jam();
    AttributePtr attr;
    table.attributes.getPtr(attr, i);
    mask.set(i);
  }
}

void
Backup::sendCreateTrig(Signal* signal, 
			   BackupRecordPtr ptr, TablePtr tabPtr)
{
  CreateTrigReq * req =(CreateTrigReq *)signal->getDataPtrSend();
  
  ptr.p->masterData.gsn = GSN_CREATE_TRIG_REQ;
  ptr.p->masterData.sendCounter = 3;
  ptr.p->masterData.createTrig.tableId = tabPtr.p->tableId;

  req->setUserRef(reference());
  req->setConnectionPtr(ptr.i);
  req->setRequestType(CreateTrigReq::RT_USER);
  
  Bitmask<MAXNROFATTRIBUTESINWORDS> attrMask;
  createAttributeMask(tabPtr, attrMask);
  req->setAttributeMask(attrMask);
  req->setTableId(tabPtr.p->tableId);
  req->setIndexId(RNIL);        // not used
  req->setTriggerId(RNIL);      // to be created
  req->setTriggerType(TriggerType::SUBSCRIPTION);
  req->setTriggerActionTime(TriggerActionTime::TA_DETACHED);
  req->setMonitorReplicas(true);
  req->setMonitorAllAttributes(false);
  req->setOnline(false);        // leave trigger offline

  char triggerName[MAX_TAB_NAME_SIZE];
  Uint32 nameBuffer[2 + ((MAX_TAB_NAME_SIZE + 3) >> 2)];  // SP string
  LinearWriter w(nameBuffer, sizeof(nameBuffer) >> 2);
  LinearSectionPtr lsPtr[3];
  
  for (int i=0; i < 3; i++) {
    req->setTriggerEvent(triggerEventValues[i]);
    BaseString::snprintf(triggerName, sizeof(triggerName), triggerNameFormat[i],
	     ptr.p->backupId, tabPtr.p->tableId);
    w.reset();
    w.add(CreateTrigReq::TriggerNameKey, triggerName);
    lsPtr[0].p = nameBuffer;
    lsPtr[0].sz = w.getWordsUsed();
    sendSignal(DBDICT_REF, GSN_CREATE_TRIG_REQ, 
	       signal, CreateTrigReq::SignalLength, JBB, lsPtr, 1);
  }
}

void
Backup::execCREATE_TRIG_CONF(Signal* signal)
{
  jamEntry();
  CreateTrigConf * conf = (CreateTrigConf*)signal->getDataPtr();
  
  const Uint32 ptrI = conf->getConnectionPtr();
  const Uint32 tableId = conf->getTableId();
  const TriggerEvent::Value type = conf->getTriggerEvent();
  const Uint32 triggerId = conf->getTriggerId();

  BackupRecordPtr ptr;