1 /* $NetBSD: rf_chaindecluster.h,v 1.1 1998/11/13 04:20:26 oster Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Khalil Amiri 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* rf_chaindecluster.h 30 * header file for Chained Declustering 31 */ 32 33 /* 34 * : 35 * Log: rf_chaindecluster.h,v 36 * Revision 1.14 1996/07/29 14:05:12 jimz 37 * fix numPUs/numRUs confusion (everything is now numRUs) 38 * clean up some commenting, return values 39 * 40 * Revision 1.13 1996/07/22 19:52:16 jimz 41 * switched node params to RF_DagParam_t, a union of 42 * a 64-bit int and a void *, for better portability 43 * attempted hpux port, but failed partway through for 44 * lack of a single C compiler capable of compiling all 45 * source files 46 * 47 * Revision 1.12 1996/06/10 11:55:47 jimz 48 * Straightened out some per-array/not-per-array distinctions, fixed 49 * a couple bugs related to confusion. Added shutdown lists. Removed 50 * layout shutdown function (now subsumed by shutdown lists). 51 * 52 * Revision 1.11 1996/06/07 22:26:27 jimz 53 * type-ify which_ru (RF_ReconUnitNum_t) 54 * 55 * Revision 1.10 1996/06/07 21:33:04 jimz 56 * begin using consistent types for sector numbers, 57 * stripe numbers, row+col numbers, recon unit numbers 58 * 59 * Revision 1.9 1996/06/03 23:28:26 jimz 60 * more bugfixes 61 * check in tree to sync for IPDS runs with current bugfixes 62 * there still may be a problem with threads in the script test 63 * getting I/Os stuck- not trivially reproducible (runs ~50 times 64 * in a row without getting stuck) 65 * 66 * Revision 1.8 1996/05/31 22:26:54 jimz 67 * fix a lot of mapping problems, memory allocation problems 68 * found some weird lock issues, fixed 'em 69 * more code cleanup 70 * 71 * Revision 1.7 1996/05/27 18:56:37 jimz 72 * more code cleanup 73 * better typing 74 * compiles in all 3 environments 75 * 76 * Revision 1.6 1996/05/23 21:46:35 jimz 77 * checkpoint in code cleanup (release prep) 78 * lots of types, function names have been fixed 79 * 80 * Revision 1.5 1996/05/18 19:51:34 jimz 81 * major code cleanup- fix syntax, make some types consistent, 82 * add prototypes, clean out dead code, et cetera 83 * 84 * Revision 1.4 1996/02/22 16:45:59 amiri 85 * added declaration of dag selection function 86 * 87 * Revision 1.3 1995/12/01 15:16:56 root 88 * added copyright info 89 * 90 * Revision 1.2 1995/11/17 19:55:21 amiri 91 * prototyped MapParityChainDecluster 92 */ 93 94 #ifndef _RF__RF_CHAINDECLUSTER_H_ 95 #define _RF__RF_CHAINDECLUSTER_H_ 96 97 int rf_ConfigureChainDecluster(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr, 98 RF_Config_t *cfgPtr); 99 RF_ReconUnitCount_t rf_GetNumSpareRUsChainDecluster(RF_Raid_t *raidPtr); 100 void rf_MapSectorChainDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector, 101 RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap); 102 void rf_MapParityChainDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t raidSector, 103 RF_RowCol_t *row, RF_RowCol_t *col, RF_SectorNum_t *diskSector, int remap); 104 void rf_IdentifyStripeChainDecluster(RF_Raid_t *raidPtr, RF_RaidAddr_t addr, 105 RF_RowCol_t **diskids, RF_RowCol_t *outRow); 106 void rf_MapSIDToPSIDChainDecluster(RF_RaidLayout_t *layoutPtr, 107 RF_StripeNum_t stripeID, RF_StripeNum_t *psID, 108 RF_ReconUnitNum_t *which_ru); 109 void rf_RAIDCDagSelect(RF_Raid_t *raidPtr, RF_IoType_t type, 110 RF_AccessStripeMap_t *asmap, 111 RF_VoidFuncPtr *); 112 #if 0 113 void (**createFunc)(RF_Raid_t *, 114 RF_AccessStripeMap_t *, 115 RF_DagHeader_t *, 116 void *, 117 RF_RaidAccessFlags_t, 118 RF_AllocListElem_t *) 119 ); 120 #endif 121 122 #endif /* !_RF__RF_CHAINDECLUSTER_H_ */ 123