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rf_pq.h revision 1.2 
      1 /*	$NetBSD: rf_pq.h,v 1.2 1999/01/26 02:34:00 oster Exp $	*/
      2 /*
      3  * rf_pq.h
      4  */
      5 /*
      6  * Copyright (c) 1995 Carnegie-Mellon University.
      7  * All rights reserved.
      8  *
      9  * Author: Daniel Stodolsky
     10  *
     11  * Permission to use, copy, modify and distribute this software and
     12  * its documentation is hereby granted, provided that both the copyright
     13  * notice and this permission notice appear in all copies of the
     14  * software, derivative works or modified versions, and any portions
     15  * thereof, and that both notices appear in supporting documentation.
     16  *
     17  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     18  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     19  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     20  *
     21  * Carnegie Mellon requests users of this software to return to
     22  *
     23  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     24  *  School of Computer Science
     25  *  Carnegie Mellon University
     26  *  Pittsburgh PA 15213-3890
     27  *
     28  * any improvements or extensions that they make and grant Carnegie the
     29  * rights to redistribute these changes.
     30  */
     31 
     32 #ifndef _RF__RF_PQ_H_
     33 #define _RF__RF_PQ_H_
     34 
     35 #include "rf_archs.h"
     36 
     37 extern RF_RedFuncs_t rf_pFuncs;
     38 extern RF_RedFuncs_t rf_pRecoveryFuncs;
     39 
     40 int rf_RegularONPFunc(RF_DagNode_t *node);
     41 int rf_SimpleONPFunc(RF_DagNode_t *node);
     42 int rf_RecoveryPFunc(RF_DagNode_t *node);
     43 int rf_RegularPFunc(RF_DagNode_t *node);
     44 
     45 #if (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0)
     46 
     47 extern RF_RedFuncs_t rf_qFuncs;
     48 extern RF_RedFuncs_t rf_qRecoveryFuncs;
     49 extern RF_RedFuncs_t rf_pqRecoveryFuncs;
     50 
     51 void rf_PQDagSelect(RF_Raid_t *raidPtr, RF_IoType_t type,
     52 	RF_AccessStripeMap_t *asmap, RF_VoidFuncPtr *createFunc);
     53 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateLargeWriteDAG);
     54 int rf_RegularONQFunc(RF_DagNode_t *node);
     55 int rf_SimpleONQFunc(RF_DagNode_t *node);
     56 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateSmallWriteDAG);
     57 int rf_RegularPQFunc(RF_DagNode_t *node);
     58 int rf_RegularQFunc(RF_DagNode_t *node);
     59 void rf_Degraded_100_PQFunc(RF_DagNode_t *node);
     60 int rf_RecoveryQFunc(RF_DagNode_t *node);
     61 int rf_RecoveryPQFunc(RF_DagNode_t *node);
     62 void rf_PQ_DegradedWriteQFunc(RF_DagNode_t *node);
     63 void rf_IncQ(unsigned long *dest, unsigned long *buf, unsigned length,
     64 	unsigned coeff);
     65 void rf_PQ_recover(unsigned long *pbuf, unsigned long *qbuf, unsigned long *abuf,
     66 	unsigned long *bbuf, unsigned length, unsigned coeff_a, unsigned coeff_b);
     67 
     68 #endif /* (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0) */
     69 
     70 #endif /* !_RF__RF_PQ_H_ */
     71