1 /* $NetBSD: rf_pq.h,v 1.3 1999/02/05 00:06:15 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@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 52 rf_PQDagSelect(RF_Raid_t * raidPtr, RF_IoType_t type, 53 RF_AccessStripeMap_t * asmap, RF_VoidFuncPtr * createFunc); 54 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateLargeWriteDAG); 55 int rf_RegularONQFunc(RF_DagNode_t * node); 56 int rf_SimpleONQFunc(RF_DagNode_t * node); 57 RF_CREATE_DAG_FUNC_DECL(rf_PQCreateSmallWriteDAG); 58 int rf_RegularPQFunc(RF_DagNode_t * node); 59 int rf_RegularQFunc(RF_DagNode_t * node); 60 void rf_Degraded_100_PQFunc(RF_DagNode_t * node); 61 int rf_RecoveryQFunc(RF_DagNode_t * node); 62 int rf_RecoveryPQFunc(RF_DagNode_t * node); 63 void rf_PQ_DegradedWriteQFunc(RF_DagNode_t * node); 64 void 65 rf_IncQ(unsigned long *dest, unsigned long *buf, unsigned length, 66 unsigned coeff); 67 void 68 rf_PQ_recover(unsigned long *pbuf, unsigned long *qbuf, unsigned long *abuf, 69 unsigned long *bbuf, unsigned length, unsigned coeff_a, unsigned coeff_b); 70 71 #endif /* (RF_INCLUDE_DECL_PQ > 0) || 72 * (RF_INCLUDE_RAID6 > 0) */ 73 74 #endif /* !_RF__RF_PQ_H_ */ 75