/*	$NetBSD: rf_chaindecluster.h,v 1.1 1998/11/13 04:20:26 oster Exp $	*/
/*
 * Copyright (c) 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Khalil Amiri
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

/* rf_chaindecluster.h
 * header file for Chained Declustering
 */

/*
 * :  
 * Log: rf_chaindecluster.h,v 
 * Revision 1.14  1996/07/29 14:05:12  jimz
 * fix numPUs/numRUs confusion (everything is now numRUs)
 * clean up some commenting, return values
 *
 * Revision 1.13  1996/07/22  19:52:16  jimz
 * switched node params to RF_DagParam_t, a union of
 * a 64-bit int and a void *, for better portability
 * attempted hpux port, but failed partway through for
 * lack of a single C compiler capable of compiling all
 * source files
 *
 * Revision 1.12  1996/06/10  11:55:47  jimz
 * Straightened out some per-array/not-per-array distinctions, fixed
 * a couple bugs related to confusion. Added shutdown lists. Removed
 * layout shutdown function (now subsumed by shutdown lists).
 *
 * Revision 1.11  1996/06/07  22:26:27  jimz
 * type-ify which_ru (RF_ReconUnitNum_t)
 *
 * Revision 1.10  1996/06/07  21:33:04  jimz
 * begin using consistent types for sector numbers,
 * stripe numbers, row+col numbers, recon unit numbers
 *
 * Revision 1.9  1996/06/03  23:28:26  jimz
 * more bugfixes
 * check in tree to sync for IPDS runs with current bugfixes
 * there still may be a problem with threads in the script test
 * getting I/Os stuck- not trivially reproducible (runs ~50 times
 * in a row without getting stuck)
 *
 * Revision 1.8  1996/05/31  22:26:54  jimz
 * fix a lot of mapping problems, memory allocation problems
 * found some weird lock issues, fixed 'em
 * more code cleanup
 *
 * Revision 1.7  1996/05/27  18:56:37  jimz
 * more code cleanup
 * better typing
 * compiles in all 3 environments
 *
 * Revision 1.6  1996/05/23  21:46:35  jimz
 * checkpoint in code cleanup (release prep)
 * lots of types, function names have been fixed
 *
 * Revision 1.5  1996/05/18  19:51:34  jimz
 * major code cleanup- fix syntax, make some types consistent,
 * add prototypes, clean out dead code, et cetera
 *
 * Revision 1.4  1996/02/22  16:45:59  amiri
 * added declaration of dag selection function
 *
 * Revision 1.3  1995/12/01  15:16:56  root
 * added copyright info
 *
 * Revision 1.2  1995/11/17  19:55:21  amiri
 * prototyped MapParityChainDecluster
 */

#ifndef _RF__RF_CHAINDECLUSTER_H_
#define _RF__RF_CHAINDECLUSTER_H_

int rf_ConfigureChainDecluster(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr,
	RF_Config_t *cfgPtr);
RF_ReconUnitCount_t rf_GetNumSpareRUsChainDecluster(RF_Raid_t *raidPtr);
void rf_MapSectorChainDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector,
	RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap);
void rf_MapParityChainDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector,
	RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap);
void rf_IdentifyStripeChainDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t addr,
	RF_RowCol_t **diskids, RF_RowCol_t *outRow);
void rf_MapSIDToPSIDChainDecluster(RF_RaidLayout_t *layoutPtr,
	RF_StripeNum_t stripeID, RF_StripeNum_t *psID,
	RF_ReconUnitNum_t *which_ru);
void rf_RAIDCDagSelect(RF_Raid_t *raidPtr, RF_IoType_t type,
		       RF_AccessStripeMap_t *asmap, 
		       RF_VoidFuncPtr *);
#if 0
		       void (**createFunc)(RF_Raid_t *, 
					   RF_AccessStripeMap_t *,
					   RF_DagHeader_t *,
					   void *, 
					   RF_RaidAccessFlags_t,
					   RF_AllocListElem_t *)
);
#endif

#endif /* !_RF__RF_CHAINDECLUSTER_H_ */