1 files changed, 275 insertions, 0 deletions
diff --git a/ndb/src/kernel/blocks/dbdih/Sysfile.hpp b/ndb/src/kernel/blocks/dbdih/Sysfile.hpp
new file mode 100644
index 00000000000..a44992d6ad0
--- /dev/null
+++ b/ndb/src/kernel/blocks/dbdih/Sysfile.hpp
@@ -0,0 +1,275 @@
+/* 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 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)
+
+/**
+ * Dummy macro to make emacs indent better
+ */
+#define _F(x) x
+
+/**
+ * No of 32 bits word in sysfile
+ * 
+ *   5 + 
+ *   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 (5 + \
+                         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 Uint32 SYSFILE_SIZE32 = _SYSFILE_SIZE32;
+  
+  Uint32 systemRestartBits;
+
+  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 Uint32 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 Uint32 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 Uint32 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