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rf_dagutils.h revision 1.2 
      1 /*	$NetBSD: rf_dagutils.h,v 1.2 1999/01/26 02:33:54 oster Exp $	*/
      2 /*
      3  * Copyright (c) 1995 Carnegie-Mellon University.
      4  * All rights reserved.
      5  *
      6  * Author: Mark Holland, William V. Courtright II
      7  *
      8  * Permission to use, copy, modify and distribute this software and
      9  * its documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie the
     26  * rights to redistribute these changes.
     27  */
     28 
     29 /*************************************************************************
     30  *
     31  * rf_dagutils.h -- header file for utility routines for manipulating DAGs
     32  *
     33  *************************************************************************/
     34 
     35 
     36 #include "rf_types.h"
     37 #include "rf_dagfuncs.h"
     38 #include "rf_general.h"
     39 
     40 #ifndef _RF__RF_DAGUTILS_H_
     41 #define _RF__RF_DAGUTILS_H_
     42 
     43 struct RF_RedFuncs_s {
     44   int   (*regular)(RF_DagNode_t *);
     45   char   *RegularName;
     46   int   (*simple)(RF_DagNode_t *);
     47   char   *SimpleName;
     48 };
     49 
     50 extern RF_RedFuncs_t rf_xorFuncs;
     51 extern RF_RedFuncs_t rf_xorRecoveryFuncs;
     52 
     53 void rf_InitNode(RF_DagNode_t *node, RF_NodeStatus_t initstatus,
     54 	      int commit,
     55 	      int (*doFunc)(RF_DagNode_t *node),
     56 	      int (*undoFunc)(RF_DagNode_t *node),
     57 	      int (*wakeFunc)(RF_DagNode_t *node, int status),
     58 	      int nSucc, int nAnte, int nParam, int nResult,
     59 	      RF_DagHeader_t *hdr, char *name, RF_AllocListElem_t *alist);
     60 
     61 void rf_FreeDAG(RF_DagHeader_t *dag_h);
     62 
     63 RF_PropHeader_t *rf_MakePropListEntry(RF_DagHeader_t *dag_h, int resultNum,
     64 	int paramNum, RF_PropHeader_t *next, RF_AllocListElem_t *allocList);
     65 
     66 int rf_ConfigureDAGs(RF_ShutdownList_t **listp);
     67 
     68 RF_DagHeader_t *rf_AllocDAGHeader(void);
     69 
     70 void rf_FreeDAGHeader(RF_DagHeader_t *dh);
     71 
     72 void *rf_AllocBuffer(RF_Raid_t *raidPtr, RF_DagHeader_t *dag_h,
     73 	RF_PhysDiskAddr_t *pda, RF_AllocListElem_t *allocList);
     74 
     75 char *rf_NodeStatusString(RF_DagNode_t *node);
     76 
     77 void rf_PrintNodeInfoString(RF_DagNode_t *node);
     78 
     79 int rf_AssignNodeNums(RF_DagHeader_t *dag_h);
     80 
     81 int rf_RecurAssignNodeNums(RF_DagNode_t *node, int num, int unvisited);
     82 
     83 void rf_ResetDAGHeaderPointers(RF_DagHeader_t *dag_h, RF_DagHeader_t *newptr);
     84 
     85 void rf_RecurResetDAGHeaderPointers(RF_DagNode_t *node, RF_DagHeader_t *newptr);
     86 
     87 void rf_PrintDAGList(RF_DagHeader_t *dag_h);
     88 
     89 int rf_ValidateDAG(RF_DagHeader_t *dag_h);
     90 
     91 void rf_redirect_asm(RF_Raid_t *raidPtr, RF_AccessStripeMap_t *asmap);
     92 
     93 void rf_MapUnaccessedPortionOfStripe(RF_Raid_t *raidPtr,
     94 	RF_RaidLayout_t *layoutPtr,
     95 	RF_AccessStripeMap_t *asmap, RF_DagHeader_t *dag_h,
     96 	RF_AccessStripeMapHeader_t **new_asm_h, int *nRodNodes, char **sosBuffer,
     97 	char **eosBuffer, RF_AllocListElem_t *allocList);
     98 
     99 int rf_PDAOverlap(RF_RaidLayout_t *layoutPtr, RF_PhysDiskAddr_t *src,
    100 	RF_PhysDiskAddr_t *dest);
    101 
    102 void rf_GenerateFailedAccessASMs(RF_Raid_t *raidPtr,
    103 	RF_AccessStripeMap_t *asmap, RF_PhysDiskAddr_t *failedPDA,
    104 	RF_DagHeader_t *dag_h, RF_AccessStripeMapHeader_t **new_asm_h,
    105 	int *nXorBufs, char **rpBufPtr, char *overlappingPDAs,
    106 	RF_AllocListElem_t *allocList);
    107 
    108 /* flags used by RangeRestrictPDA */
    109 #define RF_RESTRICT_NOBUFFER 0
    110 #define RF_RESTRICT_DOBUFFER 1
    111 
    112 void rf_RangeRestrictPDA(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *src,
    113 	RF_PhysDiskAddr_t *dest, int dobuffer, int doraidaddr);
    114 
    115 int rf_compute_workload_shift(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *pda);
    116 void rf_SelectMirrorDiskIdle(RF_DagNode_t *node);
    117 void rf_SelectMirrorDiskPartition(RF_DagNode_t *node);
    118 
    119 #endif /* !_RF__RF_DAGUTILS_H_ */
    120