1 /* $NetBSD: rf_paritylog.h,v 1.13 2019/10/10 03:43:59 christos Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: 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 (at) 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 /* header file for parity log 30 * 31 */ 32 33 #ifndef _RF__RF_PARITYLOG_H_ 34 #define _RF__RF_PARITYLOG_H_ 35 36 #include <dev/raidframe/raidframevar.h> 37 38 #define RF_DEFAULT_NUM_SECTORS_PER_LOG 64 39 40 typedef int RF_RegionId_t; 41 42 typedef enum RF_ParityRecordType_e { 43 RF_STOP, 44 RF_UPDATE, 45 RF_OVERWRITE 46 } RF_ParityRecordType_t; 47 48 struct RF_CommonLogData_s { 49 rf_declare_mutex2(mutex); /* protects cnt */ 50 int cnt; /* when 0, time to call wakeFunc */ 51 RF_Raid_t *raidPtr; 52 void (*wakeFunc) (void *, int); 53 void *wakeArg; 54 RF_AccTraceEntry_t *tracerec; 55 RF_Etimer_t startTime; 56 void *bufPtr; 57 RF_ParityRecordType_t operation; 58 RF_CommonLogData_t *next; 59 }; 60 61 struct RF_ParityLogData_s { 62 RF_RegionId_t regionID; /* this struct guaranteed to span a single 63 * region */ 64 int bufOffset; /* offset from common->bufPtr */ 65 RF_PhysDiskAddr_t diskAddress; 66 RF_CommonLogData_t *common; /* info shared by one or more 67 * parityLogData structs */ 68 RF_ParityLogData_t *next; 69 RF_ParityLogData_t *prev; 70 }; 71 72 struct RF_ParityLogAppendQueue_s { 73 rf_declare_mutex2(mutex); 74 }; 75 76 struct RF_ParityLogRecord_s { 77 RF_PhysDiskAddr_t parityAddr; 78 RF_ParityRecordType_t operation; 79 }; 80 81 struct RF_ParityLog_s { 82 RF_RegionId_t regionID; 83 int numRecords; 84 int diskOffset; 85 RF_ParityLogRecord_t *records; 86 void *bufPtr; 87 RF_ParityLog_t *next; 88 }; 89 90 struct RF_ParityLogQueue_s { 91 rf_declare_mutex2(mutex); 92 RF_ParityLog_t *parityLogs; 93 }; 94 95 struct RF_RegionBufferQueue_s { 96 rf_declare_mutex2(mutex); 97 rf_declare_cond2(cond); 98 int bufferSize; 99 int totalBuffers; /* size of array 'buffers' */ 100 int availableBuffers; /* num available 'buffers' */ 101 int emptyBuffersIndex; /* stick next freed buffer here */ 102 int availBuffersIndex; /* grab next buffer from here */ 103 void **buffers; /* array buffers used to hold parity */ 104 }; 105 #define RF_PLOG_CREATED (1<<0)/* thread is created */ 106 #define RF_PLOG_RUNNING (1<<1)/* thread is running */ 107 #define RF_PLOG_TERMINATE (1<<2)/* thread is terminated (should exit) */ 108 #define RF_PLOG_SHUTDOWN (1<<3)/* thread is aware and exiting/exited */ 109 110 struct RF_ParityLogDiskQueue_s { 111 rf_declare_mutex2(mutex);/* protects all vars in this struct */ 112 rf_declare_cond2(cond); 113 int threadState; /* is thread running, should it shutdown (see 114 * above) */ 115 RF_ParityLog_t *flushQueue; /* list of parity logs to be flushed 116 * to log disk */ 117 RF_ParityLog_t *reintQueue; /* list of parity logs waiting to be 118 * reintegrated */ 119 RF_ParityLogData_t *bufHead; /* head of FIFO list of log data, 120 * waiting on a buffer */ 121 RF_ParityLogData_t *bufTail; /* tail of FIFO list of log data, 122 * waiting on a buffer */ 123 RF_ParityLogData_t *reintHead; /* head of FIFO list of log data, 124 * waiting on reintegration */ 125 RF_ParityLogData_t *reintTail; /* tail of FIFO list of log data, 126 * waiting on reintegration */ 127 RF_ParityLogData_t *logBlockHead; /* queue of work, blocked 128 * until a log is available */ 129 RF_ParityLogData_t *logBlockTail; 130 RF_ParityLogData_t *reintBlockHead; /* queue of work, blocked 131 * until reintegration is 132 * complete */ 133 RF_ParityLogData_t *reintBlockTail; 134 RF_CommonLogData_t *freeCommonList; /* list of unused common data 135 * structs */ 136 RF_ParityLogData_t *freeDataList; /* list of unused log data 137 * structs */ 138 }; 139 140 struct RF_DiskMap_s { 141 RF_PhysDiskAddr_t parityAddr; 142 RF_ParityRecordType_t operation; 143 }; 144 145 struct RF_RegionInfo_s { 146 rf_declare_mutex2(mutex); /* protects: diskCount, diskMap, 147 * loggingEnabled, coreLog */ 148 rf_declare_mutex2(reintMutex); /* protects: reintInProgress */ 149 int reintInProgress;/* flag used to suspend flushing operations */ 150 RF_SectorCount_t capacity; /* capacity of this region in sectors */ 151 RF_SectorNum_t regionStartAddr; /* starting disk address for this 152 * region */ 153 RF_SectorNum_t parityStartAddr; /* starting disk address for this 154 * region */ 155 RF_SectorCount_t numSectorsParity; /* number of parity sectors 156 * protected by this region */ 157 RF_SectorCount_t diskCount; /* num of sectors written to this 158 * region's disk log */ 159 RF_DiskMap_t *diskMap; /* in-core map of what's in this region's disk 160 * log */ 161 int loggingEnabled; /* logging enable for this region */ 162 RF_ParityLog_t *coreLog;/* in-core log for this region */ 163 }; 164 165 RF_ParityLogData_t * 166 rf_CreateParityLogData(RF_ParityRecordType_t operation, 167 RF_PhysDiskAddr_t * pda, void *bufPtr, RF_Raid_t * raidPtr, 168 void (*wakeFunc) (void *, int), 169 void *wakeArg, RF_AccTraceEntry_t * tracerec, 170 RF_Etimer_t startTime); 171 RF_ParityLogData_t *rf_SearchAndDequeueParityLogData(RF_Raid_t * raidPtr, 172 RF_RegionId_t regionID, RF_ParityLogData_t ** head, 173 RF_ParityLogData_t ** tail, int ignoreLocks); 174 void rf_ReleaseParityLogs(RF_Raid_t * raidPtr, RF_ParityLog_t * firstLog); 175 int rf_ParityLogAppend(RF_ParityLogData_t * logData, int finish, 176 RF_ParityLog_t ** incomingLog, int clearReintFlag); 177 void rf_EnableParityLogging(RF_Raid_t * raidPtr); 178 179 #endif /* !_RF__RF_PARITYLOG_H_ */ 180
Indexes created Sat Sep 20 22:09:52 GMT 2025