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rf_dagutils.h revision 1.18 
      1 /*	$NetBSD: rf_dagutils.h,v 1.18 2005/02/27 00:27:44 perry 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 <dev/raidframe/raidframevar.h>
     37 
     38 #include "rf_dagfuncs.h"
     39 #include "rf_general.h"
     40 
     41 #ifndef _RF__RF_DAGUTILS_H_
     42 #define _RF__RF_DAGUTILS_H_
     43 
     44 struct RF_RedFuncs_s {
     45 	int     (*regular) (RF_DagNode_t *);
     46 	char   *RegularName;
     47 	int     (*simple) (RF_DagNode_t *);
     48 	char   *SimpleName;
     49 };
     50 
     51 typedef struct RF_FuncList_s {
     52 	RF_VoidFuncPtr fp;
     53    	struct RF_FuncList_s *next;
     54 } RF_FuncList_t;
     55 
     56 extern const RF_RedFuncs_t rf_xorFuncs;
     57 extern const RF_RedFuncs_t rf_xorRecoveryFuncs;
     58 
     59 void rf_InitNode(RF_DagNode_t *, RF_NodeStatus_t, int,
     60 		 int (*doFunc) (RF_DagNode_t *),
     61 		 int (*undoFunc) (RF_DagNode_t *),
     62 		 int (*wakeFunc) (RF_DagNode_t *, int),
     63 		 int, int, int, int, RF_DagHeader_t *,
     64 		 char *, RF_AllocListElem_t *);
     65 
     66 void rf_FreeDAG(RF_DagHeader_t *);
     67 int rf_ConfigureDAGs(RF_ShutdownList_t **);
     68 
     69 RF_DagHeader_t *rf_AllocDAGHeader(void);
     70 void    rf_FreeDAGHeader(RF_DagHeader_t * dh);
     71 
     72 RF_DagNode_t *rf_AllocDAGNode(void);
     73 void rf_FreeDAGNode(RF_DagNode_t *);
     74 
     75 RF_DagList_t *rf_AllocDAGList(void);
     76 void rf_FreeDAGList(RF_DagList_t *);
     77 
     78 void *rf_AllocDAGPCache(void);
     79 void rf_FreeDAGPCache(void *);
     80 
     81 RF_FuncList_t *rf_AllocFuncList(void);
     82 void rf_FreeFuncList(RF_FuncList_t *);
     83 
     84 void *rf_AllocBuffer(RF_Raid_t *, RF_DagHeader_t *, int);
     85 void *rf_AllocIOBuffer(RF_Raid_t *, int);
     86 void rf_FreeIOBuffer(RF_Raid_t *, RF_VoidPointerListElem_t *);
     87 void *rf_AllocStripeBuffer(RF_Raid_t *, RF_DagHeader_t *, int);
     88 void rf_FreeStripeBuffer(RF_Raid_t *, RF_VoidPointerListElem_t *);
     89 
     90 char *rf_NodeStatusString(RF_DagNode_t *);
     91 void rf_PrintNodeInfoString(RF_DagNode_t *);
     92 int rf_AssignNodeNums(RF_DagHeader_t *);
     93 int rf_RecurAssignNodeNums(RF_DagNode_t *, int, int);
     94 void rf_ResetDAGHeaderPointers(RF_DagHeader_t *, RF_DagHeader_t *);
     95 void rf_RecurResetDAGHeaderPointers(RF_DagNode_t *, RF_DagHeader_t *);
     96 void rf_PrintDAGList(RF_DagHeader_t *);
     97 int rf_ValidateDAG(RF_DagHeader_t *);
     98 void rf_redirect_asm(RF_Raid_t *, RF_AccessStripeMap_t *);
     99 void rf_MapUnaccessedPortionOfStripe(RF_Raid_t *, RF_RaidLayout_t *,
    100 				     RF_AccessStripeMap_t *, RF_DagHeader_t *,
    101 				     RF_AccessStripeMapHeader_t **, int *,
    102 				     char **, char **, RF_AllocListElem_t *);
    103 int rf_PDAOverlap(RF_RaidLayout_t *, RF_PhysDiskAddr_t *, RF_PhysDiskAddr_t *);
    104 void rf_GenerateFailedAccessASMs(RF_Raid_t *, RF_AccessStripeMap_t *,
    105 				 RF_PhysDiskAddr_t *, RF_DagHeader_t *,
    106 				 RF_AccessStripeMapHeader_t **,
    107 				 int *, char **, char *, RF_AllocListElem_t *);
    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 *, RF_PhysDiskAddr_t *,
    114 			 RF_PhysDiskAddr_t *, int, int);
    115 
    116 int rf_compute_workload_shift(RF_Raid_t *, RF_PhysDiskAddr_t *);
    117 void rf_SelectMirrorDiskIdle(RF_DagNode_t *);
    118 void rf_SelectMirrorDiskPartition(RF_DagNode_t *);
    119 
    120 #endif				/* !_RF__RF_DAGUTILS_H_ */
    121