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rf_dagutils.h revision 1.3 
      1 /*	$NetBSD: rf_dagutils.h,v 1.3 1999/02/05 00:06:08 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
     54 rf_InitNode(RF_DagNode_t * node, RF_NodeStatus_t initstatus,
     55     int commit,
     56     int (*doFunc) (RF_DagNode_t * node),
     57     int (*undoFunc) (RF_DagNode_t * node),
     58     int (*wakeFunc) (RF_DagNode_t * node, int status),
     59     int nSucc, int nAnte, int nParam, int nResult,
     60     RF_DagHeader_t * hdr, char *name, RF_AllocListElem_t * alist);
     61 
     62 	void    rf_FreeDAG(RF_DagHeader_t * dag_h);
     63 
     64 	RF_PropHeader_t *rf_MakePropListEntry(RF_DagHeader_t * dag_h, int resultNum,
     65             int paramNum, RF_PropHeader_t * next, RF_AllocListElem_t * allocList);
     66 
     67 	int     rf_ConfigureDAGs(RF_ShutdownList_t ** listp);
     68 
     69 	RF_DagHeader_t *rf_AllocDAGHeader(void);
     70 
     71 	void    rf_FreeDAGHeader(RF_DagHeader_t * dh);
     72 
     73 	void   *rf_AllocBuffer(RF_Raid_t * raidPtr, RF_DagHeader_t * dag_h,
     74             RF_PhysDiskAddr_t * pda, RF_AllocListElem_t * allocList);
     75 
     76 	char   *rf_NodeStatusString(RF_DagNode_t * node);
     77 
     78 	void    rf_PrintNodeInfoString(RF_DagNode_t * node);
     79 
     80 	int     rf_AssignNodeNums(RF_DagHeader_t * dag_h);
     81 
     82 	int     rf_RecurAssignNodeNums(RF_DagNode_t * node, int num, int unvisited);
     83 
     84 	void    rf_ResetDAGHeaderPointers(RF_DagHeader_t * dag_h, RF_DagHeader_t * newptr);
     85 
     86 	void    rf_RecurResetDAGHeaderPointers(RF_DagNode_t * node, RF_DagHeader_t * newptr);
     87 
     88 	void    rf_PrintDAGList(RF_DagHeader_t * dag_h);
     89 
     90 	int     rf_ValidateDAG(RF_DagHeader_t * dag_h);
     91 
     92 	void    rf_redirect_asm(RF_Raid_t * raidPtr, RF_AccessStripeMap_t * asmap);
     93 
     94 	void    rf_MapUnaccessedPortionOfStripe(RF_Raid_t * raidPtr,
     95             RF_RaidLayout_t * layoutPtr,
     96             RF_AccessStripeMap_t * asmap, RF_DagHeader_t * dag_h,
     97             RF_AccessStripeMapHeader_t ** new_asm_h, int *nRodNodes, char **sosBuffer,
     98             char **eosBuffer, RF_AllocListElem_t * allocList);
     99 
    100 	int     rf_PDAOverlap(RF_RaidLayout_t * layoutPtr, RF_PhysDiskAddr_t * src,
    101             RF_PhysDiskAddr_t * dest);
    102 
    103 	void    rf_GenerateFailedAccessASMs(RF_Raid_t * raidPtr,
    104             RF_AccessStripeMap_t * asmap, RF_PhysDiskAddr_t * failedPDA,
    105             RF_DagHeader_t * dag_h, RF_AccessStripeMapHeader_t ** new_asm_h,
    106             int *nXorBufs, char **rpBufPtr, char *overlappingPDAs,
    107             RF_AllocListElem_t * allocList);
    108 
    109 /* flags used by RangeRestrictPDA */
    110 #define RF_RESTRICT_NOBUFFER 0
    111 #define RF_RESTRICT_DOBUFFER 1
    112 
    113 	void    rf_RangeRestrictPDA(RF_Raid_t * raidPtr, RF_PhysDiskAddr_t * src,
    114             RF_PhysDiskAddr_t * dest, int dobuffer, int doraidaddr);
    115 
    116 	int     rf_compute_workload_shift(RF_Raid_t * raidPtr, RF_PhysDiskAddr_t * pda);
    117 	void    rf_SelectMirrorDiskIdle(RF_DagNode_t * node);
    118 	void    rf_SelectMirrorDiskPartition(RF_DagNode_t * node);
    119 
    120 #endif				/* !_RF__RF_DAGUTILS_H_ */
    121