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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef ClusterMgr_H
#define ClusterMgr_H
#include "API.hpp"
#include <ndb_limits.h>
#include <NdbThread.h>
#include <NdbMutex.h>
#include <NdbCondition.h>
#include <signaldata/ArbitSignalData.hpp>
#include <signaldata/NodeStateSignalData.hpp>
#include <NodeInfo.hpp>
#include <NodeState.hpp>
extern "C" void* runClusterMgr_C(void * me);
/**
* @class ClusterMgr
*/
class ClusterMgr {
friend void* runClusterMgr_C(void * me);
friend void execute(void *, struct SignalHeader * const,
Uint8, Uint32 * const, LinearSectionPtr ptr[3]);
public:
ClusterMgr(class TransporterFacade &);
~ClusterMgr();
void init(struct ndb_mgm_configuration_iterator & config);
void reportConnected(NodeId nodeId);
void reportDisconnected(NodeId nodeId);
bool checkUpgradeCompatability(Uint32 nodeVersion);
void doStop();
void startThread();
void forceHB();
private:
void threadMain();
int theStop;
class TransporterFacade & theFacade;
public:
struct Node {
Node();
bool defined;
bool connected; // Transporter connected
bool compatible; // Version is compatible
bool nfCompleteRep; // NF Complete Rep has arrived
bool m_alive; // Node is alive
NodeInfo m_info;
NodeState m_state;
/**
* Heartbeat stuff
*/
Uint32 hbFrequency; // Heartbeat frequence
Uint32 hbCounter; // # milliseconds passed since last hb sent
};
const Node & getNodeInfo(NodeId) const;
Uint32 getNoOfConnectedNodes() const;
void hb_received(NodeId);
Uint32 m_connect_count;
private:
Uint32 noOfAliveNodes;
Uint32 noOfConnectedNodes;
Node theNodes[MAX_NODES];
NdbThread* theClusterMgrThread;
NodeBitmask waitForHBFromNodes; // used in forcing HBs
NdbCondition* waitForHBCond;
bool waitingForHB;
/**
* Used for controlling start/stop of the thread
*/
NdbMutex* clusterMgrThreadMutex;
void showState(NodeId nodeId);
void reportNodeFailed(NodeId nodeId);
/**
* Signals received
*/
void execAPI_REGREQ (const Uint32 * theData);
void execAPI_REGCONF (const Uint32 * theData);
void execAPI_REGREF (const Uint32 * theData);
void execNODE_FAILREP (const Uint32 * theData);
void execNF_COMPLETEREP(const Uint32 * theData);
inline void set_node_alive(Node& node, bool alive){
if(node.m_alive && !alive)
{
assert(noOfAliveNodes);
noOfAliveNodes--;
}
else if(!node.m_alive && alive)
{
noOfAliveNodes++;
}
node.m_alive = alive;
}
};
inline
const ClusterMgr::Node &
ClusterMgr::getNodeInfo(NodeId nodeId) const {
return theNodes[nodeId];
}
inline
Uint32
ClusterMgr::getNoOfConnectedNodes() const {
return noOfConnectedNodes;
}
inline
void
ClusterMgr::hb_received(NodeId nodeId) {
theNodes[nodeId].m_info.m_heartbeat_cnt= 0;
}
/*****************************************************************************/
/**
* @class ArbitMgr
* Arbitration manager. Runs in separate thread.
* Started only by a request from the kernel.
*/
extern "C" void* runArbitMgr_C(void* me);
class ArbitMgr
{
public:
ArbitMgr(class TransporterFacade &);
~ArbitMgr();
inline void setRank(unsigned n) { theRank = n; }
inline void setDelay(unsigned n) { theDelay = n; }
void doStart(const Uint32* theData);
void doChoose(const Uint32* theData);
void doStop(const Uint32* theData);
friend void* runArbitMgr_C(void* me);
private:
class TransporterFacade & theFacade;
unsigned theRank;
unsigned theDelay;
void threadMain();
NdbThread* theThread;
NdbMutex* theThreadMutex; // not really needed
struct ArbitSignal {
GlobalSignalNumber gsn;
ArbitSignalData data;
NDB_TICKS timestamp;
inline void init(GlobalSignalNumber aGsn, const Uint32* aData) {
gsn = aGsn;
if (aData != NULL)
memcpy(&data, aData, sizeof(data));
else
memset(&data, 0, sizeof(data));
}
inline void setTimestamp() {
timestamp = NdbTick_CurrentMillisecond();
}
inline NDB_TICKS getTimediff() {
NDB_TICKS now = NdbTick_CurrentMillisecond();
return now < timestamp ? 0 : now - timestamp;
}
};
NdbMutex* theInputMutex;
NdbCondition* theInputCond;
int theInputTimeout;
bool theInputFull; // the predicate
ArbitSignal theInputBuffer; // shared buffer
void sendSignalToThread(ArbitSignal& aSignal);
enum State { // thread states
StateInit,
StateStarted, // thread started
StateChoose1, // received one valid REQ
StateChoose2, // received two valid REQs
StateFinished // finished one way or other
};
State theState;
enum Stop { // stop code in ArbitSignal.data.code
StopExit = 1, // at API exit
StopRequest = 2, // request from kernel
StopRestart = 3 // stop before restart
};
void threadStart(ArbitSignal& aSignal); // handle thread events
void threadChoose(ArbitSignal& aSignal);
void threadTimeout();
void threadStop(ArbitSignal& aSignal);
ArbitSignal theStartReq;
ArbitSignal theChooseReq1;
ArbitSignal theChooseReq2;
ArbitSignal theStopOrd;
void sendStartConf(ArbitSignal& aSignal, Uint32);
void sendChooseRef(ArbitSignal& aSignal, Uint32);
void sendChooseConf(ArbitSignal& aSignal, Uint32);
void sendStopRep(ArbitSignal& aSignal, Uint32);
void sendSignalToQmgr(ArbitSignal& aSignal);
};
#endif
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