The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: rf_desc.h,v 1.12.2.2 2004/06/28 08:33:01 tron 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 #ifndef _RF__RF_DESC_H_
   30 #define _RF__RF_DESC_H_
   31 
   32 #include <dev/raidframe/raidframevar.h>
   33 
   34 #include "rf_archs.h"
   35 #include "rf_etimer.h"
   36 #include "rf_dag.h"
   37 #include "rf_layout.h"
   38 
   39 struct RF_RaidReconDesc_s {
   40         RF_Raid_t *raidPtr;     /* raid device descriptor */
   41         RF_RowCol_t col;        /* col of failed disk */
   42         int     state;          /* how far along the reconstruction operation
   43                                  * has gotten */
   44         RF_RaidDisk_t *spareDiskPtr;    /* describes target disk for recon
   45                                          * (not used in dist sparing) */
   46         int     numDisksDone;   /* the number of surviving disks that have
   47                                  * completed their work */
   48         RF_RowCol_t scol;       /* col ID of the spare disk (not used in dist
   49                                  * sparing) */
   50         /*
   51          * Prevent recon from hogging CPU
   52          */
   53         RF_Etimer_t recon_exec_timer;
   54         RF_uint64 reconExecTimerRunning;
   55         RF_uint64 reconExecTicks;
   56         RF_uint64 maxReconExecTicks;
   57 
   58 #if RF_RECON_STATS > 0
   59         RF_uint64 hsStallCount; /* head sep stall count */
   60         RF_uint64 numReconExecDelays;
   61         RF_uint64 numReconEventWaits;
   62 #endif                          /* RF_RECON_STATS > 0 */
   63         RF_RaidReconDesc_t *next;
   64 };
   65 
   66 struct RF_RaidAccessDesc_s {
   67         RF_Raid_t *raidPtr;     /* raid device descriptor */
   68         RF_IoType_t type;       /* read or write */
   69         RF_RaidAddr_t raidAddress;      /* starting address in raid address
   70                                          * space */
   71         RF_SectorCount_t numBlocks;     /* number of blocks (sectors) to
   72                                          * transfer */
   73         RF_StripeCount_t numStripes;    /* number of stripes involved in
   74                                          * access */
   75         caddr_t bufPtr;         /* pointer to data buffer */
   76         RF_RaidAccessFlags_t flags;     /* flags controlling operation */
   77         int     state;          /* index into states telling how far along the
   78                                  * RAID operation has gotten */
   79         const RF_AccessState_t *states; /* array of states to be run */
   80         int     status;         /* pass/fail status of the last operation */
   81         RF_DagList_t *dagList;  /* list of dag lists, one list per stripe */
   82         RF_VoidPointerListElem_t *iobufs; /* iobufs that need to be cleaned 
   83                                              up at the end of this IO */
   84         RF_VoidPointerListElem_t *stripebufs; /* stripe buffers that need to 
   85                                                  be cleaned up at the end of
   86                                                  this IO */
   87         RF_AccessStripeMapHeader_t *asmap;      /* the asm for this I/O */
   88         void   *bp;             /* buf pointer for this RAID acc.  ignored
   89                                  * outside the kernel */
   90         RF_AccTraceEntry_t tracerec;    /* perf monitoring information for a
   91                                          * user access (not for dag stats) */
   92         void    (*callbackFunc) (RF_CBParam_t); /* callback function for this
   93                                                  * I/O */
   94         void   *callbackArg;    /* arg to give to callback func */
   95         RF_RaidAccessDesc_t *next;
   96         int     async_flag;
   97         RF_Etimer_t timer;      /* used for timing this access */
   98 };
   99 #endif                          /* !_RF__RF_DESC_H_ */

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