1 /* $NetBSD: rf_reconmap.h,v 1.12 2011/05/10 07:04:17 mrg Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Mark Holland 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 * rf_reconMap.h -- Header file describing reconstruction status data structure 31 ******************************************************************************/ 32 33 #ifndef _RF__RF_RECONMAP_H_ 34 #define _RF__RF_RECONMAP_H_ 35 36 #include <dev/raidframe/raidframevar.h> 37 #include <sys/pool.h> 38 39 #include "rf_threadstuff.h" 40 41 /* the number of recon units in the status table. */ 42 #define RF_RECONMAP_SIZE 32 43 44 /* 45 * Main reconstruction status descriptor. 46 */ 47 struct RF_ReconMap_s { 48 RF_SectorCount_t sectorsPerReconUnit; /* sectors per reconstruct 49 * unit */ 50 RF_SectorCount_t sectorsInDisk; /* total sectors in disk */ 51 RF_SectorCount_t unitsLeft; /* recon units left to recon */ 52 RF_ReconUnitCount_t totalRUs; /* total recon units on disk */ 53 RF_ReconUnitCount_t spareRUs; /* total number of spare RUs on failed 54 * disk */ 55 RF_ReconUnitCount_t low_ru; /* lowest reconstruction unit number in 56 the status array */ 57 RF_ReconUnitCount_t high_ru; /* highest reconstruction unit number 58 in the status array */ 59 RF_ReconUnitCount_t head; /* the position in the array where 60 low_ru is found */ 61 RF_ReconUnitCount_t status_size; /* number of recon units in status */ 62 RF_StripeCount_t totalParityStripes; /* total number of parity 63 * stripes in array */ 64 RF_ReconMapListElem_t **status; /* array of ptrs to list elements */ 65 struct pool elem_pool; /* pool of RF_ReconMapListElem_t's */ 66 rf_declare_mutex2(mutex); 67 rf_declare_cond2(cv); 68 int lock; /* 1 if someone has the recon map 69 locked, 0 otherwise */ 70 }; 71 /* a list element */ 72 struct RF_ReconMapListElem_s { 73 RF_SectorNum_t startSector; /* bounding sect nums on this block */ 74 RF_SectorNum_t stopSector; 75 RF_ReconMapListElem_t *next; /* next element in list */ 76 }; 77 78 RF_ReconMap_t *rf_MakeReconMap(RF_Raid_t *, RF_SectorCount_t, 79 RF_SectorCount_t, RF_ReconUnitCount_t); 80 void rf_ReconMapUpdate(RF_Raid_t *, RF_ReconMap_t *, RF_SectorNum_t, RF_SectorNum_t); 81 void rf_FreeReconMap(RF_ReconMap_t *); 82 int rf_CheckRUReconstructed(RF_ReconMap_t *, RF_SectorNum_t); 83 RF_ReconUnitCount_t rf_UnitsLeftToReconstruct(RF_ReconMap_t *); 84 void rf_PrintReconMap(RF_Raid_t *, RF_ReconMap_t *, RF_RowCol_t); 85 void rf_PrintReconSchedule(RF_ReconMap_t *, struct timeval *); 86 87 #endif /* !_RF__RF_RECONMAP_H_ */ 88