1 /* $NetBSD: rf_dagutils.h,v 1.3 1999/02/05 00:06:08 oster Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Mark Holland, William V. Courtright II 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 /************************************************************************* 30 * 31 * rf_dagutils.h -- header file for utility routines for manipulating DAGs 32 * 33 *************************************************************************/ 34 35 36 #include "rf_types.h" 37 #include "rf_dagfuncs.h" 38 #include "rf_general.h" 39 40 #ifndef _RF__RF_DAGUTILS_H_ 41 #define _RF__RF_DAGUTILS_H_ 42 43 struct RF_RedFuncs_s { 44 int (*regular) (RF_DagNode_t *); 45 char *RegularName; 46 int (*simple) (RF_DagNode_t *); 47 char *SimpleName; 48 }; 49 50 extern RF_RedFuncs_t rf_xorFuncs; 51 extern RF_RedFuncs_t rf_xorRecoveryFuncs; 52 53 void 54 rf_InitNode(RF_DagNode_t * node, RF_NodeStatus_t initstatus, 55 int commit, 56 int (*doFunc) (RF_DagNode_t * node), 57 int (*undoFunc) (RF_DagNode_t * node), 58 int (*wakeFunc) (RF_DagNode_t * node, int status), 59 int nSucc, int nAnte, int nParam, int nResult, 60 RF_DagHeader_t * hdr, char *name, RF_AllocListElem_t * alist); 61 62 void rf_FreeDAG(RF_DagHeader_t * dag_h); 63 64 RF_PropHeader_t *rf_MakePropListEntry(RF_DagHeader_t * dag_h, int resultNum, 65 int paramNum, RF_PropHeader_t * next, RF_AllocListElem_t * allocList); 66 67 int rf_ConfigureDAGs(RF_ShutdownList_t ** listp); 68 69 RF_DagHeader_t *rf_AllocDAGHeader(void); 70 71 void rf_FreeDAGHeader(RF_DagHeader_t * dh); 72 73 void *rf_AllocBuffer(RF_Raid_t * raidPtr, RF_DagHeader_t * dag_h, 74 RF_PhysDiskAddr_t * pda, RF_AllocListElem_t * allocList); 75 76 char *rf_NodeStatusString(RF_DagNode_t * node); 77 78 void rf_PrintNodeInfoString(RF_DagNode_t * node); 79 80 int rf_AssignNodeNums(RF_DagHeader_t * dag_h); 81 82 int rf_RecurAssignNodeNums(RF_DagNode_t * node, int num, int unvisited); 83 84 void rf_ResetDAGHeaderPointers(RF_DagHeader_t * dag_h, RF_DagHeader_t * newptr); 85 86 void rf_RecurResetDAGHeaderPointers(RF_DagNode_t * node, RF_DagHeader_t * newptr); 87 88 void rf_PrintDAGList(RF_DagHeader_t * dag_h); 89 90 int rf_ValidateDAG(RF_DagHeader_t * dag_h); 91 92 void rf_redirect_asm(RF_Raid_t * raidPtr, RF_AccessStripeMap_t * asmap); 93 94 void rf_MapUnaccessedPortionOfStripe(RF_Raid_t * raidPtr, 95 RF_RaidLayout_t * layoutPtr, 96 RF_AccessStripeMap_t * asmap, RF_DagHeader_t * dag_h, 97 RF_AccessStripeMapHeader_t ** new_asm_h, int *nRodNodes, char **sosBuffer, 98 char **eosBuffer, RF_AllocListElem_t * allocList); 99 100 int rf_PDAOverlap(RF_RaidLayout_t * layoutPtr, RF_PhysDiskAddr_t * src, 101 RF_PhysDiskAddr_t * dest); 102 103 void rf_GenerateFailedAccessASMs(RF_Raid_t * raidPtr, 104 RF_AccessStripeMap_t * asmap, RF_PhysDiskAddr_t * failedPDA, 105 RF_DagHeader_t * dag_h, RF_AccessStripeMapHeader_t ** new_asm_h, 106 int *nXorBufs, char **rpBufPtr, char *overlappingPDAs, 107 RF_AllocListElem_t * allocList); 108 109 /* flags used by RangeRestrictPDA */ 110 #define RF_RESTRICT_NOBUFFER 0 111 #define RF_RESTRICT_DOBUFFER 1 112 113 void rf_RangeRestrictPDA(RF_Raid_t * raidPtr, RF_PhysDiskAddr_t * src, 114 RF_PhysDiskAddr_t * dest, int dobuffer, int doraidaddr); 115 116 int rf_compute_workload_shift(RF_Raid_t * raidPtr, RF_PhysDiskAddr_t * pda); 117 void rf_SelectMirrorDiskIdle(RF_DagNode_t * node); 118 void rf_SelectMirrorDiskPartition(RF_DagNode_t * node); 119 120 #endif /* !_RF__RF_DAGUTILS_H_ */ 121