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rf_pq.h revision 1.1 
      1 /*	$NetBSD: rf_pq.h,v 1.1 1998/11/13 04:20:32 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  * :
     33  * Log: rf_pq.h,v
     34  * Revision 1.9  1996/07/31 15:35:05  jimz
     35  * evenodd changes; bugfixes for double-degraded archs, generalize
     36  * some formerly PQ-only functions
     37  *
     38  * Revision 1.8  1996/07/27  23:36:08  jimz
     39  * Solaris port of simulator
     40  *
     41  * Revision 1.7  1996/06/03  23:28:26  jimz
     42  * more bugfixes
     43  * check in tree to sync for IPDS runs with current bugfixes
     44  * there still may be a problem with threads in the script test
     45  * getting I/Os stuck- not trivially reproducible (runs ~50 times
     46  * in a row without getting stuck)
     47  *
     48  * Revision 1.6  1996/06/02  17:31:48  jimz
     49  * Moved a lot of global stuff into array structure, where it belongs.
     50  * Fixed up paritylogging, pss modules in this manner. Some general
     51  * code cleanup. Removed lots of dead code, some dead files.
     52  *
     53  * Revision 1.5  1996/05/31  22:26:54  jimz
     54  * fix a lot of mapping problems, memory allocation problems
     55  * found some weird lock issues, fixed 'em
     56  * more code cleanup
     57  *
     58  * Revision 1.4  1996/05/27  18:56:37  jimz
     59  * more code cleanup
     60  * better typing
     61  * compiles in all 3 environments
     62  *
     63  * Revision 1.3  1996/05/24  22:17:04  jimz
     64  * continue code + namespace cleanup
     65  * typed a bunch of flags
     66  *
     67  * Revision 1.2  1996/05/23  21:46:35  jimz
     68  * checkpoint in code cleanup (release prep)
     69  * lots of types, function names have been fixed
     70  *
     71  * Revision 1.1  1996/05/18  19:56:21  jimz
     72  * Initial revision
     73  *
     74  */
     75 
     76 #ifndef _RF__RF_PQ_H_
     77 #define _RF__RF_PQ_H_
     78 
     79 #include "rf_archs.h"
     80 
     81 extern RF_RedFuncs_t rf_pFuncs;
     82 extern RF_RedFuncs_t rf_pRecoveryFuncs;
     83 
     84 int rf_RegularONPFunc(RF_DagNode_t *node);
     85 int rf_SimpleONPFunc(RF_DagNode_t *node);
     86 int rf_RecoveryPFunc(RF_DagNode_t *node);
     87 int rf_RegularPFunc(RF_DagNode_t *node);
     88 
     89 #if (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0)
     90 
     91 extern RF_RedFuncs_t rf_qFuncs;
     92 extern RF_RedFuncs_t rf_qRecoveryFuncs;
     93 extern RF_RedFuncs_t rf_pqRecoveryFuncs;
     94 
     95 void rf_PQDagSelect(RF_Raid_t *raidPtr, RF_IoType_t type,
     96 	RF_AccessStripeMap_t *asmap, RF_VoidFuncPtr *createFunc);
     97 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateLargeWriteDAG);
     98 int rf_RegularONQFunc(RF_DagNode_t *node);
     99 int rf_SimpleONQFunc(RF_DagNode_t *node);
    100 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateSmallWriteDAG);
    101 int rf_RegularPQFunc(RF_DagNode_t *node);
    102 int rf_RegularQFunc(RF_DagNode_t *node);
    103 void rf_Degraded_100_PQFunc(RF_DagNode_t *node);
    104 int rf_RecoveryQFunc(RF_DagNode_t *node);
    105 int rf_RecoveryPQFunc(RF_DagNode_t *node);
    106 void rf_PQ_DegradedWriteQFunc(RF_DagNode_t *node);
    107 void rf_IncQ(unsigned long *dest, unsigned long *buf, unsigned length,
    108 	unsigned coeff);
    109 void rf_PQ_recover(unsigned long *pbuf, unsigned long *qbuf, unsigned long *abuf,
    110 	unsigned long *bbuf, unsigned length, unsigned coeff_a, unsigned coeff_b);
    111 
    112 #endif /* (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0) */
    113 
    114 #endif /* !_RF__RF_PQ_H_ */
    115