xref: /src/sys/dev/raidframe/rf_dagutils.h

/*	$NetBSD: rf_dagutils.h,v 1.2 1999/01/26 02:33:54 oster Exp $	*/
/*
 * Copyright (c) 1995 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Mark Holland, William V. Courtright II
 *
 * 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 (at) 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_dagutils.h -- header file for utility routines for manipulating DAGs
 *
 *************************************************************************/


#include "rf_types.h"
#include "rf_dagfuncs.h"
#include "rf_general.h"

#ifndef _RF__RF_DAGUTILS_H_
#define _RF__RF_DAGUTILS_H_

struct RF_RedFuncs_s {
  int   (*regular)(RF_DagNode_t *);
  char   *RegularName;
  int   (*simple)(RF_DagNode_t *);
  char   *SimpleName;
};

extern RF_RedFuncs_t rf_xorFuncs;
extern RF_RedFuncs_t rf_xorRecoveryFuncs;

void rf_InitNode(RF_DagNode_t *node, RF_NodeStatus_t initstatus,
	      int commit,
	      int (*doFunc)(RF_DagNode_t *node),
	      int (*undoFunc)(RF_DagNode_t *node),
	      int (*wakeFunc)(RF_DagNode_t *node, int status),
	      int nSucc, int nAnte, int nParam, int nResult,
	      RF_DagHeader_t *hdr, char *name, RF_AllocListElem_t *alist);

void rf_FreeDAG(RF_DagHeader_t *dag_h);

RF_PropHeader_t *rf_MakePropListEntry(RF_DagHeader_t *dag_h, int resultNum,
	int paramNum, RF_PropHeader_t *next, RF_AllocListElem_t *allocList);

int rf_ConfigureDAGs(RF_ShutdownList_t **listp);

RF_DagHeader_t *rf_AllocDAGHeader(void);

void rf_FreeDAGHeader(RF_DagHeader_t *dh);

void *rf_AllocBuffer(RF_Raid_t *raidPtr, RF_DagHeader_t *dag_h,
	RF_PhysDiskAddr_t *pda, RF_AllocListElem_t *allocList);

char *rf_NodeStatusString(RF_DagNode_t *node);

void rf_PrintNodeInfoString(RF_DagNode_t *node);

int rf_AssignNodeNums(RF_DagHeader_t *dag_h);

int rf_RecurAssignNodeNums(RF_DagNode_t *node, int num, int unvisited);

void rf_ResetDAGHeaderPointers(RF_DagHeader_t *dag_h, RF_DagHeader_t *newptr);

void rf_RecurResetDAGHeaderPointers(RF_DagNode_t *node, RF_DagHeader_t *newptr);

void rf_PrintDAGList(RF_DagHeader_t *dag_h);

int rf_ValidateDAG(RF_DagHeader_t *dag_h);

void rf_redirect_asm(RF_Raid_t *raidPtr, RF_AccessStripeMap_t *asmap);

void rf_MapUnaccessedPortionOfStripe(RF_Raid_t *raidPtr,
	RF_RaidLayout_t *layoutPtr,
	RF_AccessStripeMap_t *asmap, RF_DagHeader_t *dag_h,
	RF_AccessStripeMapHeader_t **new_asm_h, int *nRodNodes, char **sosBuffer,
	char **eosBuffer, RF_AllocListElem_t *allocList);

int rf_PDAOverlap(RF_RaidLayout_t *layoutPtr, RF_PhysDiskAddr_t *src,
	RF_PhysDiskAddr_t *dest);

void rf_GenerateFailedAccessASMs(RF_Raid_t *raidPtr,
	RF_AccessStripeMap_t *asmap, RF_PhysDiskAddr_t *failedPDA,
	RF_DagHeader_t *dag_h, RF_AccessStripeMapHeader_t **new_asm_h,
	int *nXorBufs, char **rpBufPtr, char *overlappingPDAs,
	RF_AllocListElem_t *allocList);

/* flags used by RangeRestrictPDA */
#define RF_RESTRICT_NOBUFFER 0
#define RF_RESTRICT_DOBUFFER 1

void rf_RangeRestrictPDA(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *src,
	RF_PhysDiskAddr_t *dest, int dobuffer, int doraidaddr);

int rf_compute_workload_shift(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *pda);
void rf_SelectMirrorDiskIdle(RF_DagNode_t *node);
void rf_SelectMirrorDiskPartition(RF_DagNode_t *node);

#endif /* !_RF__RF_DAGUTILS_H_ */