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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; version 2 of the License.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#ifndef MgmtSrvr_H
#define MgmtSrvr_H
#include <kernel_types.h>
#include "Config.hpp"
#include <NdbCondition.h>
#include <mgmapi.h>
#include <NdbTCP.h>
#include <ConfigRetriever.hpp>
#include <Vector.hpp>
#include <NodeBitmask.hpp>
#include <signaldata/ManagementServer.hpp>
#include <ndb_version.h>
#include <EventLogger.hpp>
#include <signaldata/EventSubscribeReq.hpp>
#include <SignalSender.hpp>
/**
* @desc Block number for Management server.
* @todo This should probably be somewhere else. I don't know where atm.
*/
#define MGMSRV 1
#define MGM_ERROR_MAX_INJECT_SESSION_ONLY 10000
extern int g_errorInsert;
class ConfigInfoServer;
class NdbApiSignal;
class Config;
class SetLogLevelOrd;
class SocketServer;
class Ndb_mgmd_event_service : public EventLoggerBase
{
friend class MgmtSrvr;
public:
struct Event_listener : public EventLoggerBase {
Event_listener() {}
NDB_SOCKET_TYPE m_socket;
Uint32 m_parsable;
};
private:
class MgmtSrvr * m_mgmsrv;
MutexVector<Event_listener> m_clients;
public:
Ndb_mgmd_event_service(class MgmtSrvr * m) : m_clients(5) {
m_mgmsrv = m;
}
void add_listener(const Event_listener&);
void check_listeners();
void update_max_log_level(const LogLevel&);
void update_log_level(const LogLevel&);
void log(int eventType, const Uint32* theData, NodeId nodeId);
void stop_sessions();
Event_listener& operator[](unsigned i) { return m_clients[i]; }
const Event_listener& operator[](unsigned i) const { return m_clients[i]; }
void lock() { m_clients.lock(); }
void unlock(){ m_clients.unlock(); }
};
/**
* @class MgmtSrvr
* @brief Main class for the management server.
*
* It has one interface to be used by a local client.
* With the methods it's possible to send different kind of commands to
* DB processes, as log level, set trace number etc.
*
* A MgmtSrvr creates a ConfigInfoServer which serves request on TCP sockets.
* The requests come typical from DB and API processes which want
* to fetch its configuration parameters. The MgmtSrvr knows about the
* configuration by reading a configuration file.
*
* The MgmtSrvr class corresponds in some ways to the Ndb class in API.
* It creates a TransporterFacade, receives signals and defines signals
* to send and receive.
*/
class MgmtSrvr {
public:
// some compilers need all of this
class Allocated_resources;
friend class Allocated_resources;
class Allocated_resources {
public:
Allocated_resources(class MgmtSrvr &m);
~Allocated_resources();
// methods to reserve/allocate resources which
// will be freed when running destructor
void reserve_node(NodeId id, NDB_TICKS timeout);
bool is_timed_out(NDB_TICKS tick);
bool is_reserved(NodeId nodeId) { return m_reserved_nodes.get(nodeId); }
bool is_reserved(NodeBitmask mask) { return !mask.bitAND(m_reserved_nodes).isclear(); }
bool isclear() { return m_reserved_nodes.isclear(); }
NodeId get_nodeid() const;
private:
MgmtSrvr &m_mgmsrv;
NodeBitmask m_reserved_nodes;
NDB_TICKS m_alloc_timeout;
};
NdbMutex *m_node_id_mutex;
/**
* Start/initate the event log.
*/
void startEventLog();
/**
* Stop the event log.
*/
void stopEventLog();
/**
* Enable/disable eventlog log levels/severities.
*
* @param serverity the log level/serverity.
* @return true if the severity was enabled.
*/
bool setEventLogFilter(int severity, int enable);
/**
* Returns true if the log level/severity is enabled.
*
* @param severity the severity level.
*/
bool isEventLogFilterEnabled(int severity);
/**
* This enum specifies the different signal loggig modes possible to set
* with the setSignalLoggingMode method.
*/
enum LogMode {In, Out, InOut, Off};
/* Constructor */
MgmtSrvr(SocketServer *socket_server,
const char *config_filename, /* Where to save config */
const char *connect_string);
int init();
NodeId getOwnNodeId() const {return _ownNodeId;};
/**
* Read (initial) config file, create TransporterFacade,
* define signals, create ConfigInfoServer.
* @return true if succeeded, otherwise false
*/
bool check_start(); // may be run before start to check that some things are ok
bool start(BaseString &error_string);
~MgmtSrvr();
/**
* Get status on a node.
* address may point to a common area (e.g. from inet_addr)
* There is no gaurentee that it is preserved across calls.
* Copy the string if you are not going to use it immediately.
*/
int status(int nodeId,
ndb_mgm_node_status * status,
Uint32 * version,
Uint32 * phase,
bool * systemShutdown,
Uint32 * dynamicId,
Uint32 * nodeGroup,
Uint32 * connectCount,
const char **address);
// All the functions below may return any of this error codes:
// NO_CONTACT_WITH_PROCESS, PROCESS_NOT_CONFIGURED, WRONG_PROCESS_TYPE,
// COULD_NOT_ALLOCATE_MEMORY, SEND_OR_RECEIVE_FAILED
/**
* Save a configuration to permanent storage
*/
int saveConfig(const Config *);
/**
* Save the running configuration
*/
int saveConfig() {
return saveConfig(_config);
};
/**
* Read configuration from file, or from another MGM server
*/
Config *readConfig();
/**
* Fetch configuration from another MGM server
*/
Config *fetchConfig();
/**
* Stop a node
*
* @param processId: Id of the DB process to stop
* @return 0 if succeeded, otherwise: as stated above, plus:
*/
int stopNodes(const Vector<NodeId> &node_ids, int *stopCount, bool abort,
int *stopSelf);
int shutdownMGM(int *stopCount, bool abort, int *stopSelf);
/**
* shutdown the DB nodes
*/
int shutdownDB(int * cnt = 0, bool abort = false);
/**
* print version info about a node
*
* @param processId: Id of the DB process to stop
* @return 0 if succeeded, otherwise: as stated above, plus:
*/
int versionNode(int nodeId, Uint32 &version, const char **address);
/**
* Maintenance on the system
*/
int enterSingleUser(int * cnt = 0, Uint32 singleuserNodeId = 0);
/**
* Resume from maintenance on the system
*/
int exitSingleUser(int * cnt = 0, bool abort = false);
/**
* Start DB process.
* @param processId: Id of the DB process to start
* @return 0 if succeeded, otherwise: as stated above, plus:
*/
int start(int processId);
/**
* Restart nodes
* @param processId: Id of the DB process to start
*/
int restartNodes(const Vector<NodeId> &node_ids,
int *stopCount, bool nostart,
bool initialStart, bool abort, int *stopSelf);
/**
* Restart all DB nodes
*/
int restartDB(bool nostart, bool initialStart,
bool abort = false,
int * stopCount = 0);
struct BackupEvent {
enum Event {
BackupStarted = 1,
BackupFailedToStart = 2,
BackupCompleted = 3,
BackupAborted = 4
} Event;
NdbNodeBitmask Nodes;
union {
struct {
Uint32 BackupId;
} Started ;
struct {
Uint32 ErrorCode;
} FailedToStart ;
struct {
Uint64 NoOfBytes;
Uint64 NoOfRecords;
Uint32 BackupId;
Uint32 NoOfLogBytes;
Uint32 NoOfLogRecords;
Uint32 startGCP;
Uint32 stopGCP;
} Completed ;
struct {
Uint32 BackupId;
Uint32 Reason;
Uint32 ErrorCode;
} Aborted ;
};
};
/**
* Backup functionallity
*/
int startBackup(Uint32& backupId, int waitCompleted= 2);
int abortBackup(Uint32 backupId);
int performBackup(Uint32* backupId);
//**************************************************************************
// Description: Set event report level for a DB process
// Parameters:
// processId: Id of the DB process
// level: Event report level
// isResend: Flag to indicate for resending log levels during node restart
// Returns: 0 if succeeded, otherwise: as stated above, plus:
// INVALID_LEVEL
//**************************************************************************
int setEventReportingLevelImpl(int processId, const EventSubscribeReq& ll);
int setNodeLogLevelImpl(int processId, const SetLogLevelOrd & ll);
/**
* Insert an error in a DB process.
* @param processId: Id of the DB process
* @param errorNo: The error number. > 0.
* @return 0 if succeeded, otherwise: as stated above, plus:
* INVALID_ERROR_NUMBER
*/
int insertError(int processId, int errorNo);
int setTraceNo(int processId, int traceNo);
//**************************************************************************
// Description: Set trace number in a DB process.
// Parameters:
// processId: Id of the DB process
// trace: Trace number
// Returns: 0 if succeeded, otherwise: as stated above, plus:
// INVALID_TRACE_NUMBER
//**************************************************************************
int setSignalLoggingMode(int processId, LogMode mode,
const Vector<BaseString> &blocks);
int setSignalLoggingMode(int processId, LogMode mode,
BaseString &block) {
Vector<BaseString> v;
v.push_back(block);
return setSignalLoggingMode(processId, mode, v);
}
//**************************************************************************
// Description: Set signal logging mode for blocks in a DB process.
// Parameters:
// processId: Id of the DB process
// mode: The log mode
// blocks: Which blocks to be affected (container of strings)
// Returns: 0 if succeeded, otherwise: as stated above, plus:
// INVALID_BLOCK_NAME
//**************************************************************************
int startSignalTracing(int processId);
//**************************************************************************
// Description: Start signal tracing for a DB process.
// Parameters:
// processId: Id of the DB process
// Returns: 0 if succeeded, otherwise: as stated above.
//**************************************************************************
int stopSignalTracing(int processId);
//**************************************************************************
// Description: Stop signal tracing for a DB process.
// Parameters:
// processId: Id of the DB process
// Returns: 0 if succeeded, otherwise: as stated above.
//**************************************************************************
/**
* Dump State
*/
int dumpState(int processId, const Uint32 args[], Uint32 argNo);
int dumpState(int processId, const char* args);
/**
* Get next node id (node id gt that _nodeId)
* of specified type and save it in _nodeId
*
* @return false if none found
*/
bool getNextNodeId(NodeId * _nodeId, enum ndb_mgm_node_type type) const ;
bool alloc_node_id(NodeId * _nodeId, enum ndb_mgm_node_type type,
struct sockaddr *client_addr,
SOCKET_SIZE_TYPE *client_addr_len,
int &error_code, BaseString &error_string,
int log_event = 1);
/**
*
*/
enum ndb_mgm_node_type getNodeType(NodeId) const;
/**
* Get error text
*
* @param errorCode: Error code to get a match error text for.
* @return The error text.
*/
const char* getErrorText(int errorCode, char *buf, int buf_sz);
/**
* Get configuration
*/
const Config * getConfig() const;
/**
* Returns the node count for the specified node type.
*
* @param type The node type.
* @return The number of nodes of the specified type.
*/
int getNodeCount(enum ndb_mgm_node_type type) const;
/**
* Returns the port number.
* @return port number.
*/
int getPort() const;
int setDbParameter(int node, int parameter, const char * value, BaseString&);
int setConnectionDbParameter(int node1, int node2, int param, int value,
BaseString& msg);
int getConnectionDbParameter(int node1, int node2, int param,
int *value, BaseString& msg);
int connect_to_self(void);
void transporter_connect(NDB_SOCKET_TYPE sockfd);
ConfigRetriever *get_config_retriever() { return m_config_retriever; };
const char *get_connect_address(Uint32 node_id);
void get_connected_nodes(NodeBitmask &connected_nodes) const;
SocketServer *get_socket_server() { return m_socket_server; }
void updateStatus();
//**************************************************************************
private:
//**************************************************************************
int sendStopMgmd(NodeId nodeId,
bool abort,
bool stop,
bool restart,
bool nostart,
bool initialStart);
int sendSTOP_REQ(const Vector<NodeId> &node_ids,
NodeBitmask &stoppedNodes,
Uint32 singleUserNodeId,
bool abort,
bool stop,
bool restart,
bool nostart,
bool initialStart,
int *stopSelf);
/**
* Check if it is possible to send a signal to a (DB) process
*
* @param processId: Id of the process to send to
* @return 0 OK, 1 process dead, 2 API or MGMT process, 3 not configured
*/
int okToSendTo(NodeId nodeId, bool unCond = false);
/**
* Get block number for a block
*
* @param blockName: Block to get number for
* @return -1 if block not found, otherwise block number
*/
int getBlockNumber(const BaseString &blockName);
int alloc_node_id_req(NodeId free_node_id, enum ndb_mgm_node_type type);
//**************************************************************************
int _blockNumber;
NodeId _ownNodeId;
SocketServer *m_socket_server;
BlockReference _ownReference;
NdbMutex *m_configMutex;
const Config * _config;
Config * m_newConfig;
BaseString m_configFilename;
Uint32 m_nextConfigGenerationNumber;
NodeBitmask m_reserved_nodes;
struct in_addr m_connect_address[MAX_NODES];
//**************************************************************************
// Specific signal handling methods
//**************************************************************************
static void defineSignals(int blockNumber);
//**************************************************************************
// Description: Define all signals to be sent or received for a block
// Parameters:
// blockNumber: The block number send/receive
// Returns: -
//**************************************************************************
void handleReceivedSignal(NdbApiSignal* signal);
//**************************************************************************
// Description: This method is called from "another" thread when a signal
// is received. If expect the received signal and succeed to handle it
// we signal with a condition variable to the waiting
// thread (receiveOptimisedResponse) that the signal has arrived.
// Parameters:
// signal: The recieved signal
// Returns: -
//**************************************************************************
void handleStatus(NodeId nodeId, bool alive, bool nfComplete);
//**************************************************************************
// Description: Handle the death of a process
// Parameters:
// processId: Id of the dead process.
// Returns: -
//**************************************************************************
//**************************************************************************
// Specific signal handling data
//**************************************************************************
//**************************************************************************
//**************************************************************************
// General signal handling methods
// This functions are more or less copied from the Ndb class.
/**
* WaitSignalType defines states where each state define a set of signals
* we accept to receive.
* The state is set after we have sent a signal.
* When a signal arrives we first check current state (handleReceivedSignal)
* to verify that we expect the arrived signal.
* It's only then we are in state accepting the arrived signal
* we handle the signal.
*/
enum WaitSignalType {
NO_WAIT, // We don't expect to receive any signal
WAIT_SUBSCRIBE_CONF // Accept event subscription confirmation
};
/**
* This function is called from "outside" of MgmtSrvr
* when a signal is sent to MgmtSrvr.
* @param mgmtSrvr: The MgmtSrvr object which shall recieve the signal.
* @param signal: The received signal.
*/
static void signalReceivedNotification(void* mgmtSrvr,
NdbApiSignal* signal,
struct LinearSectionPtr ptr[3]);
/**
* Called from "outside" of MgmtSrvr when a DB process has died.
* @param mgmtSrvr: The MgmtSrvr object wreceiveOptimisedResponsehich
* shall receive the notification.
* @param processId: Id of the dead process.
*/
static void nodeStatusNotification(void* mgmSrv, Uint32 nodeId,
bool alive, bool nfCompleted);
/**
* An event from <i>nodeId</i> has arrived
*/
void eventReport(const Uint32 * theData);
//**************************************************************************
//**************************************************************************
// General signal handling data
STATIC_CONST( WAIT_FOR_RESPONSE_TIMEOUT = 300000 ); // Milliseconds
// Max time to wait for a signal to arrive
NdbApiSignal* theSignalIdleList;
// List of unused signals
Uint32 theWaitNode;
WaitSignalType theWaitState;
// State denoting a set of signals we accept to recieve.
NdbCondition* theMgmtWaitForResponseCondPtr;
// Condition variable used when we wait for a signal to arrive/a
// signal arrives.
// We wait in receiveOptimisedResponse and signal in handleReceivedSignal.
NdbMgmHandle m_local_mgm_handle;
char m_local_mgm_connect_string[20];
class TransporterFacade * theFacade;
int sendVersionReq( int processId, Uint32 &version, const char **address);
int translateStopRef(Uint32 errCode);
bool _isStopThread;
int _logLevelThreadSleep;
MutexVector<NodeId> m_started_nodes;
MutexVector<EventSubscribeReq> m_log_level_requests;
LogLevel m_nodeLogLevel[MAX_NODES];
enum ndb_mgm_node_type nodeTypes[MAX_NODES];
friend class MgmApiSession;
friend class Ndb_mgmd_event_service;
Ndb_mgmd_event_service m_event_listner;
NodeId m_master_node;
/**
* Handles the thread wich upon a 'Node is started' event will
* set the node's previous loglevel settings.
*/
struct NdbThread* _logLevelThread;
static void *logLevelThread_C(void *);
void logLevelThreadRun();
Config *_props;
ConfigRetriever *m_config_retriever;
};
inline
const Config *
MgmtSrvr::getConfig() const {
return _config;
}
#endif // MgmtSrvr_H
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