FreeBSD/Linux Kernel Cross Reference
sys/dev/raidframe/rf_reconmap.h

     /*      $NetBSD: rf_reconmap.h,v 1.9 2004/03/18 16:54:54 oster Exp $    */
     /*
      * Copyright (c) 1995 Carnegie-Mellon University.
      * All rights reserved.
      *
      * Author: Mark Holland
      *
      * Permission to use, copy, modify and distribute this software and
      * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     */
    
    /******************************************************************************
     * rf_reconMap.h -- Header file describing reconstruction status data structure
     ******************************************************************************/
    
    #ifndef _RF__RF_RECONMAP_H_
    #define _RF__RF_RECONMAP_H_
    
    #include <dev/raidframe/raidframevar.h>
    #include <sys/pool.h>
    
    #include "rf_threadstuff.h"
    
    /*
     * Main reconstruction status descriptor.
     */
    struct RF_ReconMap_s {
            RF_SectorCount_t sectorsPerReconUnit;   /* sectors per reconstruct
                                                     * unit */
            RF_SectorCount_t sectorsInDisk; /* total sectors in disk */
            RF_SectorCount_t unitsLeft;     /* recon units left to recon */
            RF_ReconUnitCount_t totalRUs;   /* total recon units on disk */
            RF_ReconUnitCount_t spareRUs;   /* total number of spare RUs on failed
                                             * disk */
            RF_StripeCount_t totalParityStripes;    /* total number of parity
                                                     * stripes in array */
            RF_ReconMapListElem_t **status; /* array of ptrs to list elements */
            struct pool elem_pool;          /* pool of RF_ReconMapListElem_t's */
            RF_DECLARE_MUTEX(mutex)
            int lock;                       /* 1 if someone has the recon map
                                               locked, 0 otherwise */
    };
    /* a list element */
    struct RF_ReconMapListElem_s {
            RF_SectorNum_t startSector;     /* bounding sect nums on this block */
            RF_SectorNum_t stopSector;
            RF_ReconMapListElem_t *next;    /* next element in list */
    };
    
    RF_ReconMap_t *rf_MakeReconMap(RF_Raid_t *, RF_SectorCount_t,
                                   RF_SectorCount_t, RF_ReconUnitCount_t);
    void rf_ReconMapUpdate(RF_Raid_t *, RF_ReconMap_t *, RF_SectorNum_t, RF_SectorNum_t);
    void rf_FreeReconMap(RF_ReconMap_t *);
    int rf_CheckRUReconstructed(RF_ReconMap_t *, RF_SectorNum_t);
    RF_ReconUnitCount_t rf_UnitsLeftToReconstruct(RF_ReconMap_t *);
    void rf_PrintReconMap(RF_Raid_t *, RF_ReconMap_t *, RF_RowCol_t);
    void rf_PrintReconSchedule(RF_ReconMap_t *, struct timeval *);
    
    #endif                          /* !_RF__RF_RECONMAP_H_ */

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