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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef SYSFILE_HPP
#define SYSFILE_HPP
#include <ndb_types.h>
#include <ndb_limits.h>
#include <NodeBitmask.hpp>
/**
* No bits in Sysfile to represent nodeid
*/
#define NODEID_BITS 8
/**
* Constant representing that node do not belong to
* any node group
*/
#define NO_NODE_GROUP_ID ((1 << NODEID_BITS) - 1)
/**
* No of 32 bits word in sysfile
*
* 6 + // was 5 in < version 5.1
* MAX_NDB_NODES + // lastCompletedGCI
* NODE_ARRAY_SIZE(MAX_NDB_NODES, 4) + // nodeStatus
* NODE_ARRAY_SIZE(MAX_NDB_NODES, NODEID_BITS) + // nodeGroups
* NODE_ARRAY_SIZE(MAX_NDB_NODES, NODEID_BITS) + // takeOver
* NodeBitmask::NDB_NODE_BITMASK_SIZE // Lcp Active
*/
#define _SYSFILE_SIZE32 (6 + \
MAX_NDB_NODES + \
NODE_ARRAY_SIZE(MAX_NDB_NODES, 4) + \
NODE_ARRAY_SIZE(MAX_NDB_NODES, NODEID_BITS) + \
NODE_ARRAY_SIZE(MAX_NDB_NODES, NODEID_BITS) + \
_NDB_NODE_BITMASK_SIZE)
/**
* This struct defines the format of P<X>.sysfile
*/
struct Sysfile {
public:
/**
* No of 32 bits words in the sysfile
*/
STATIC_CONST( SYSFILE_SIZE32 = _SYSFILE_SIZE32 );
Uint32 systemRestartBits;
/**
* Restart seq for _this_ node...
*/
Uint32 m_restart_seq;
static bool getInitialStartOngoing(const Uint32 & systemRestartBits);
static void setInitialStartOngoing(Uint32 & systemRestartBits);
static void clearInitialStartOngoing(Uint32 & systemRestartBits);
static bool getRestartOngoing(const Uint32 & systemRestartBits);
static void setRestartOngoing(Uint32 & systemRestartBits);
static void clearRestartOngoing(Uint32 & systemRestartBits);
static bool getLCPOngoing(const Uint32 & systemRestartBits);
static void setLCPOngoing(Uint32 & systemRestartBits);
static void clearLCPOngoing(Uint32 & systemRestartBits);
Uint32 keepGCI;
Uint32 oldestRestorableGCI;
Uint32 newestRestorableGCI;
Uint32 latestLCP_ID;
/**
* Last completed GCI for each node
*/
Uint32 lastCompletedGCI[MAX_NDB_NODES];
/**
* Active status bits
*
* It takes 4 bits to represent it
*/
enum ActiveStatus {
NS_Active = 0
,NS_ActiveMissed_1 = 1
,NS_ActiveMissed_2 = 2
,NS_ActiveMissed_3 = 3
,NS_HotSpare = 4
,NS_NotActive_NotTakenOver = 5
,NS_TakeOver = 6
,NS_NotActive_TakenOver = 7
,NS_NotDefined = 8
,NS_Standby = 9
};
STATIC_CONST( NODE_STATUS_SIZE = NODE_ARRAY_SIZE(MAX_NDB_NODES, 4) );
Uint32 nodeStatus[NODE_STATUS_SIZE];
static Uint32 getNodeStatus(NodeId, const Uint32 nodeStatus[]);
static void setNodeStatus(NodeId, Uint32 nodeStatus[], Uint32 status);
/**
* The node group of each node
* Sizeof(NodeGroup) = 8 Bit
*/
STATIC_CONST( NODE_GROUPS_SIZE = NODE_ARRAY_SIZE(MAX_NDB_NODES,
NODEID_BITS) );
Uint32 nodeGroups[NODE_GROUPS_SIZE];
static Uint16 getNodeGroup(NodeId, const Uint32 nodeGroups[]);
static void setNodeGroup(NodeId, Uint32 nodeGroups[], Uint16 group);
/**
* Any node can take over for any node
*/
STATIC_CONST( TAKE_OVER_SIZE = NODE_ARRAY_SIZE(MAX_NDB_NODES,
NODEID_BITS) );
Uint32 takeOver[TAKE_OVER_SIZE];
static NodeId getTakeOverNode(NodeId, const Uint32 takeOver[]);
static void setTakeOverNode(NodeId, Uint32 takeOver[], NodeId toNode);
/**
* Is a node running a LCP
*/
Uint32 lcpActive[NdbNodeBitmask::Size];
};
#if (MAX_NDB_NODES > (1<<NODEID_BITS))
#error "Sysfile node id is too small"
#endif
/**
* Restart Info
*
* i = Initial start completed
* r = Crash during system restart
* l = Crash during local checkpoint
* 1111111111222222222233
* 01234567890123456789012345678901
* irl
*/
inline
bool
Sysfile::getInitialStartOngoing(const Uint32 & systemRestartBits){
return systemRestartBits & 1;
}
inline
void
Sysfile::setInitialStartOngoing(Uint32 & systemRestartBits){
systemRestartBits |= 1;
}
inline
void
Sysfile::clearInitialStartOngoing(Uint32 & systemRestartBits){
systemRestartBits &= ~1;
}
inline
bool
Sysfile::getRestartOngoing(const Uint32 & systemRestartBits){
return (systemRestartBits & 2) != 0;
}
inline
void
Sysfile::setRestartOngoing(Uint32 & systemRestartBits){
systemRestartBits |= 2;
}
inline
void
Sysfile::clearRestartOngoing(Uint32 & systemRestartBits){
systemRestartBits &= ~2;
}
inline
bool
Sysfile::getLCPOngoing(const Uint32 & systemRestartBits){
return systemRestartBits & 4;
}
inline
void
Sysfile::setLCPOngoing(Uint32 & systemRestartBits){
systemRestartBits |= 4;
}
inline
void
Sysfile::clearLCPOngoing(Uint32 & systemRestartBits){
systemRestartBits &= ~4;
}
inline
Uint32
Sysfile::getNodeStatus(NodeId nodeId, const Uint32 nodeStatus[]){
const int word = nodeId >> 3;
const int shift = (nodeId & 7) << 2;
return (nodeStatus[word] >> shift) & 15;
}
inline
void
Sysfile::setNodeStatus(NodeId nodeId, Uint32 nodeStatus[], Uint32 status){
const int word = nodeId >> 3;
const int shift = (nodeId & 7) << 2;
const Uint32 mask = ~(((Uint32)15) << shift);
const Uint32 tmp = nodeStatus[word];
nodeStatus[word] = (tmp & mask) | ((status & 15) << shift);
}
inline
Uint16
Sysfile::getNodeGroup(NodeId nodeId, const Uint32 nodeGroups[]){
const int word = nodeId >> 2;
const int shift = (nodeId & 3) << 3;
return (nodeGroups[word] >> shift) & 255;
}
inline
void
Sysfile::setNodeGroup(NodeId nodeId, Uint32 nodeGroups[], Uint16 group){
const int word = nodeId >> 2;
const int shift = (nodeId & 3) << 3;
const Uint32 mask = ~(((Uint32)255) << shift);
const Uint32 tmp = nodeGroups[word];
nodeGroups[word] = (tmp & mask) | ((group & 255) << shift);
}
inline
NodeId
Sysfile::getTakeOverNode(NodeId nodeId, const Uint32 takeOver[]){
const int word = nodeId >> 2;
const int shift = (nodeId & 3) << 3;
return (takeOver[word] >> shift) & 255;
}
inline
void
Sysfile::setTakeOverNode(NodeId nodeId, Uint32 takeOver[], NodeId toNode){
const int word = nodeId >> 2;
const int shift = (nodeId & 3) << 3;
const Uint32 mask = ~(((Uint32)255) << shift);
const Uint32 tmp = takeOver[word];
takeOver[word] = (tmp & mask) | ((toNode & 255) << shift);
}
#endif
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