backup.cpp

mysql-5.0.22.tar.gz源码包

    p = 'G';
    break;
  default:
    p = 0;
  }
  char str[2];
  str[0] = p;
  str[1] = 0;
  Uint32 tmp = (val.val + (loop >> 1)) / loop;
#if 1
  if(p > 0)
    out << tmp << str;
  else
    out << tmp;
#else
  out << val.val;
#endif

  return out;
}

void
Backup::execBACKUP_CONF(Signal* signal)
{
  jamEntry();
  BackupConf * conf = (BackupConf*)signal->getDataPtr();
  
  ndbout_c("Backup %d has started", conf->backupId);
}

void
Backup::execBACKUP_REF(Signal* signal)
{
  jamEntry();
  BackupRef * ref = (BackupRef*)signal->getDataPtr();

  ndbout_c("Backup (%d) has NOT started %d", ref->senderData, ref->errorCode);
}

void
Backup::execBACKUP_COMPLETE_REP(Signal* signal)
{
  jamEntry();
  BackupCompleteRep* rep = (BackupCompleteRep*)signal->getDataPtr();
 
  startTime = NdbTick_CurrentMillisecond() - startTime;
  
  ndbout_c("Backup %d has completed", rep->backupId);
  const Uint32 bytes = rep->noOfBytes;
  const Uint32 records = rep->noOfRecords;

  Number rps = xps(records, startTime);
  Number bps = xps(bytes, startTime);

  ndbout << " Data [ "
	 << Number(records) << " rows " 
	 << Number(bytes) << " bytes " << startTime << " ms ] " 
	 << " => "
	 << rps << " row/s & " << bps << "b/s" << endl;

  bps = xps(rep->noOfLogBytes, startTime);
  rps = xps(rep->noOfLogRecords, startTime);

  ndbout << " Log [ "
	 << Number(rep->noOfLogRecords) << " log records " 
	 << Number(rep->noOfLogBytes) << " bytes " << startTime << " ms ] " 
	 << " => "
	 << rps << " records/s & " << bps << "b/s" << endl;

}

void
Backup::execBACKUP_ABORT_REP(Signal* signal)
{
  jamEntry();
  BackupAbortRep* rep = (BackupAbortRep*)signal->getDataPtr();
  
  ndbout_c("Backup %d has been aborted %d", rep->backupId, rep->reason);
}

const TriggerEvent::Value triggerEventValues[] = {
  TriggerEvent::TE_INSERT,
  TriggerEvent::TE_UPDATE,
  TriggerEvent::TE_DELETE
};

const char* triggerNameFormat[] = {
  "NDB$BACKUP_%d_%d_INSERT",
  "NDB$BACKUP_%d_%d_UPDATE",
  "NDB$BACKUP_%d_%d_DELETE"
};

const Backup::State 
Backup::validSlaveTransitions[] = {
  INITIAL,  DEFINING,
  DEFINING, DEFINED,
  DEFINED,  STARTED,
  STARTED,  STARTED, // Several START_BACKUP_REQ is sent
  STARTED,  SCANNING,
  SCANNING, STARTED,
  STARTED,  STOPPING,
  STOPPING, CLEANING,
  CLEANING, INITIAL,
  
  INITIAL,  ABORTING, // Node fail
  DEFINING, ABORTING,
  DEFINED,  ABORTING,
  STARTED,  ABORTING,
  SCANNING, ABORTING,
  STOPPING, ABORTING,
  CLEANING, ABORTING, // Node fail w/ master takeover
  ABORTING, ABORTING, // Slave who initiates ABORT should have this transition
  
  ABORTING, INITIAL,
  INITIAL,  INITIAL
};

const Uint32
Backup::validSlaveTransitionsCount = 
sizeof(Backup::validSlaveTransitions) / sizeof(Backup::State);

void
Backup::CompoundState::setState(State newState){
  bool found = false;
  const State currState = state;
  for(unsigned i = 0; i<noOfValidTransitions; i+= 2) {
    jam();
    if(validTransitions[i]   == currState &&
       validTransitions[i+1] == newState){
      jam();
      found = true;
      break;
    }
  }

  //ndbrequire(found);
  
  if (newState == INITIAL)
    abortState = INITIAL;
  if(newState == ABORTING && currState != ABORTING) {
    jam();
    abortState = currState;
  }
  state = newState;
#ifdef DEBUG_ABORT
  if (newState != currState) {
    ndbout_c("%u: Old state = %u, new state = %u, abort state = %u",
	     id, currState, newState, abortState);
  }
#endif
}

void
Backup::CompoundState::forceState(State newState)
{
  const State currState = state;
  if (newState == INITIAL)
    abortState = INITIAL;
  if(newState == ABORTING && currState != ABORTING) {
    jam();
    abortState = currState;
  }
  state = newState;
#ifdef DEBUG_ABORT
  if (newState != currState) {
    ndbout_c("%u: FORCE: Old state = %u, new state = %u, abort state = %u",
	     id, currState, newState, abortState);
  }
#endif
}

Backup::Table::Table(ArrayPool<Attribute> & ah, 
		     ArrayPool<Fragment> & fh) 
  : attributes(ah), fragments(fh)
{
  triggerIds[0] = ILLEGAL_TRIGGER_ID;
  triggerIds[1] = ILLEGAL_TRIGGER_ID;
  triggerIds[2] = ILLEGAL_TRIGGER_ID;
  triggerAllocated[0] = false;
  triggerAllocated[1] = false;
  triggerAllocated[2] = false;
}

/*****************************************************************************
 * 
 * Node state handling
 *
 *****************************************************************************/
void
Backup::execNODE_FAILREP(Signal* signal)
{
  jamEntry();

  NodeFailRep * rep = (NodeFailRep*)signal->getDataPtr();
  
  bool doStuff = false;
  /*
  Start by saving important signal data which will be destroyed before the
  process is completed.
  */
  NodeId new_master_node_id = rep->masterNodeId;
  Uint32 theFailedNodes[NodeBitmask::Size];
  for (Uint32 i = 0; i < NodeBitmask::Size; i++)
    theFailedNodes[i] = rep->theNodes[i];
  
  c_masterNodeId = new_master_node_id;

  NodePtr nodePtr;
  for(c_nodes.first(nodePtr); nodePtr.i != RNIL; c_nodes.next(nodePtr)) {
    jam();
    if(NodeBitmask::get(theFailedNodes, nodePtr.p->nodeId)){
      if(nodePtr.p->alive){
	jam();
	ndbrequire(c_aliveNodes.get(nodePtr.p->nodeId));
	doStuff = true;
      } else {
        jam();
	ndbrequire(!c_aliveNodes.get(nodePtr.p->nodeId));
      }//if
      nodePtr.p->alive = 0;
      c_aliveNodes.clear(nodePtr.p->nodeId);
    }//if
  }//for

  if(!doStuff){
    jam();
    return;
  }//if
  
#ifdef DEBUG_ABORT
  ndbout_c("****************** Node fail rep ******************");
#endif

  NodeId newCoordinator = c_masterNodeId;
  BackupRecordPtr ptr;
  for(c_backups.first(ptr); ptr.i != RNIL; c_backups.next(ptr)) {
    jam();
    checkNodeFail(signal, ptr, newCoordinator, theFailedNodes);
  }
}

bool
Backup::verifyNodesAlive(BackupRecordPtr ptr,
			 const NdbNodeBitmask& aNodeBitMask)
{
  Uint32 version = getNodeInfo(getOwnNodeId()).m_version;
  for (Uint32 i = 0; i < MAX_NDB_NODES; i++) {
    jam();
    if(aNodeBitMask.get(i)) {
      if(!c_aliveNodes.get(i)){
        jam();
	ptr.p->setErrorCode(AbortBackupOrd::BackupFailureDueToNodeFail);
        return false;
      }//if
      if(getNodeInfo(i).m_version != version)
      {
	jam();
	ptr.p->setErrorCode(AbortBackupOrd::IncompatibleVersions);
	return false;
      }
    }//if
  }//for
  return true;
}

void
Backup::checkNodeFail(Signal* signal,
		      BackupRecordPtr ptr,
		      NodeId newCoord,
		      Uint32 theFailedNodes[NodeBitmask::Size])
{
  NdbNodeBitmask mask;
  mask.assign(2, theFailedNodes);

  /* Update ptr.p->nodes to be up to date with current alive nodes
   */
  NodePtr nodePtr;
  bool found = false;
  for(c_nodes.first(nodePtr); nodePtr.i != RNIL; c_nodes.next(nodePtr)) {
    jam();
    if(NodeBitmask::get(theFailedNodes, nodePtr.p->nodeId)) {
      jam();
      if (ptr.p->nodes.get(nodePtr.p->nodeId)) {
	jam();
	ptr.p->nodes.clear(nodePtr.p->nodeId); 
	found = true;
      }
    }//if
  }//for

  if(!found) {
    jam();
    return; // failed node is not part of backup process, safe to continue
  }

  if(mask.get(refToNode(ptr.p->masterRef)))
  {
    /**
     * Master died...abort
     */
    ptr.p->masterRef = reference();
    ptr.p->nodes.clear();
    ptr.p->nodes.set(getOwnNodeId());
    ptr.p->setErrorCode(AbortBackupOrd::BackupFailureDueToNodeFail);
    switch(ptr.p->m_gsn){
    case GSN_DEFINE_BACKUP_REQ:
    case GSN_START_BACKUP_REQ:
    case GSN_BACKUP_FRAGMENT_REQ:
    case GSN_STOP_BACKUP_REQ:
      // I'm currently processing...reply to self and abort...
      ptr.p->masterData.gsn = ptr.p->m_gsn;
      ptr.p->masterData.sendCounter = ptr.p->nodes;
      return;
    case GSN_DEFINE_BACKUP_REF:
    case GSN_DEFINE_BACKUP_CONF:
    case GSN_START_BACKUP_REF:
    case GSN_START_BACKUP_CONF:
    case GSN_BACKUP_FRAGMENT_REF:
    case GSN_BACKUP_FRAGMENT_CONF:
    case GSN_STOP_BACKUP_REF:
    case GSN_STOP_BACKUP_CONF:
      ptr.p->masterData.gsn = GSN_DEFINE_BACKUP_REQ;
      masterAbort(signal, ptr);
      return;
    case GSN_ABORT_BACKUP_ORD:
      // Already aborting
      return;
    }
  }
  else if (newCoord == getOwnNodeId())
  {
    /**
     * I'm master for this backup
     */
    jam();
    CRASH_INSERTION((10001));
#ifdef DEBUG_ABORT
    ndbout_c("**** Master: Node failed: Master id = %u", 
	     refToNode(ptr.p->masterRef));
#endif

    Uint32 gsn, len, pos;
    ptr.p->nodes.bitANDC(mask);
    switch(ptr.p->masterData.gsn){
    case GSN_DEFINE_BACKUP_REQ:
    {
      DefineBackupRef * ref = (DefineBackupRef*)signal->getDataPtr();
      ref->backupPtr = ptr.i;
      ref->backupId = ptr.p->backupId;
      ref->errorCode = AbortBackupOrd::BackupFailureDueToNodeFail;
      gsn= GSN_DEFINE_BACKUP_REF;
      len= DefineBackupRef::SignalLength;
      pos= &ref->nodeId - signal->getDataPtr();
      break;
    }
    case GSN_START_BACKUP_REQ:
    {
      StartBackupRef * ref = (StartBackupRef*)signal->getDataPtr();
      ref->backupPtr = ptr.i;
      ref->backupId = ptr.p->backupId;
      ref->errorCode = AbortBackupOrd::BackupFailureDueToNodeFail;
      ref->signalNo = ptr.p->masterData.startBackup.signalNo;
      gsn= GSN_START_BACKUP_REF;
      len= StartBackupRef::SignalLength;
      pos= &ref->nodeId - signal->getDataPtr();
      break;
    }
    case GSN_BACKUP_FRAGMENT_REQ:
    {
      BackupFragmentRef * ref = (BackupFragmentRef*)signal->getDataPtr();
      ref->backupPtr = ptr.i;
      ref->backupId = ptr.p->backupId;
      ref->errorCode = AbortBackupOrd::BackupFailureDueToNodeFail;
      gsn= GSN_BACKUP_FRAGMENT_REF;
      len= BackupFragmentRef::SignalLength;
      pos= &ref->nodeId - signal->getDataPtr();
      break;
    }
    case GSN_STOP_BACKUP_REQ:
    {
      StopBackupRef * ref = (StopBackupRef*)signal->getDataPtr();
      ref->backupPtr = ptr.i;
      ref->backupId = ptr.p->backupId;
      ref->errorCode = AbortBackupOrd::BackupFailureDueToNodeFail;
      gsn= GSN_STOP_BACKUP_REF;
      len= StopBackupRef::SignalLength;
      pos= &ref->nodeId - signal->getDataPtr();
      break;
    }
    case GSN_WAIT_GCP_REQ:
    case GSN_DROP_TRIG_REQ:
    case GSN_CREATE_TRIG_REQ:
    case GSN_ALTER_TRIG_REQ:
      ptr.p->setErrorCode(AbortBackupOrd::BackupFailureDueToNodeFail);
      return;
    case GSN_UTIL_SEQUENCE_REQ:
    case GSN_UTIL_LOCK_REQ:
      return;
    default:
      ndbrequire(false);
    }
    
    for(Uint32 i = 0; (i = mask.find(i+1)) != NdbNodeBitmask::NotFound; )
    {
      signal->theData[pos] = i;
      sendSignal(reference(), gsn, signal, len, JBB);
#ifdef DEBUG_ABORT
      ndbout_c("sending %d to self from %d", gsn, i);
#endif
    }
    return;
  }//if
  
  /**
   * I abort myself as slave if not master
   */
  CRASH_INSERTION((10021));
} 

void
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