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rf_reconmap.h revision 1.9 
      1 /*	$NetBSD: rf_reconmap.h,v 1.9 2004/03/18 16:54:54 oster 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 (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 /******************************************************************************
     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 /*
     42  * Main reconstruction status descriptor.
     43  */
     44 struct RF_ReconMap_s {
     45 	RF_SectorCount_t sectorsPerReconUnit;	/* sectors per reconstruct
     46 						 * unit */
     47 	RF_SectorCount_t sectorsInDisk;	/* total sectors in disk */
     48 	RF_SectorCount_t unitsLeft;	/* recon units left to recon */
     49 	RF_ReconUnitCount_t totalRUs;	/* total recon units on disk */
     50 	RF_ReconUnitCount_t spareRUs;	/* total number of spare RUs on failed
     51 					 * disk */
     52 	RF_StripeCount_t totalParityStripes;	/* total number of parity
     53 						 * stripes in array */
     54 	RF_ReconMapListElem_t **status;	/* array of ptrs to list elements */
     55 	struct pool elem_pool;          /* pool of RF_ReconMapListElem_t's */
     56 	RF_DECLARE_MUTEX(mutex)
     57 	int lock;                       /* 1 if someone has the recon map
     58 					   locked, 0 otherwise */
     59 };
     60 /* a list element */
     61 struct RF_ReconMapListElem_s {
     62 	RF_SectorNum_t startSector;	/* bounding sect nums on this block */
     63 	RF_SectorNum_t stopSector;
     64 	RF_ReconMapListElem_t *next;	/* next element in list */
     65 };
     66 
     67 RF_ReconMap_t *rf_MakeReconMap(RF_Raid_t *, RF_SectorCount_t,
     68 			       RF_SectorCount_t, RF_ReconUnitCount_t);
     69 void rf_ReconMapUpdate(RF_Raid_t *, RF_ReconMap_t *, RF_SectorNum_t, RF_SectorNum_t);
     70 void rf_FreeReconMap(RF_ReconMap_t *);
     71 int rf_CheckRUReconstructed(RF_ReconMap_t *, RF_SectorNum_t);
     72 RF_ReconUnitCount_t rf_UnitsLeftToReconstruct(RF_ReconMap_t *);
     73 void rf_PrintReconMap(RF_Raid_t *, RF_ReconMap_t *, RF_RowCol_t);
     74 void rf_PrintReconSchedule(RF_ReconMap_t *, struct timeval *);
     75 
     76 #endif				/* !_RF__RF_RECONMAP_H_ */
     77