113 lines
3.9 KiB
C
113 lines
3.9 KiB
C
/* $NetBSD: rf_desc.h,v 1.5 2000/01/09 00:00:18 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _RF__RF_DESC_H_
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#define _RF__RF_DESC_H_
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#include "rf_archs.h"
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#include "rf_types.h"
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#include "rf_etimer.h"
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#include "rf_dag.h"
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struct RF_RaidReconDesc_s {
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RF_Raid_t *raidPtr; /* raid device descriptor */
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RF_RowCol_t row; /* row of failed disk */
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RF_RowCol_t col; /* col of failed disk */
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int state; /* how far along the reconstruction operation
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* has gotten */
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RF_RaidDisk_t *spareDiskPtr; /* describes target disk for recon
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* (not used in dist sparing) */
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int numDisksDone; /* the number of surviving disks that have
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* completed their work */
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RF_RowCol_t srow; /* row ID of the spare disk (not used in dist
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* sparing) */
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RF_RowCol_t scol; /* col ID of the spare disk (not used in dist
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* sparing) */
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/*
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* Prevent recon from hogging CPU
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*/
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RF_Etimer_t recon_exec_timer;
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RF_uint64 reconExecTimerRunning;
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RF_uint64 reconExecTicks;
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RF_uint64 maxReconExecTicks;
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#if RF_RECON_STATS > 0
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RF_uint64 hsStallCount; /* head sep stall count */
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RF_uint64 numReconExecDelays;
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RF_uint64 numReconEventWaits;
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#endif /* RF_RECON_STATS > 0 */
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RF_RaidReconDesc_t *next;
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};
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struct RF_RaidAccessDesc_s {
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RF_Raid_t *raidPtr; /* raid device descriptor */
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RF_IoType_t type; /* read or write */
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RF_RaidAddr_t raidAddress; /* starting address in raid address
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* space */
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RF_SectorCount_t numBlocks; /* number of blocks (sectors) to
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* transfer */
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RF_StripeCount_t numStripes; /* number of stripes involved in
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* access */
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caddr_t bufPtr; /* pointer to data buffer */
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RF_RaidAccessFlags_t flags; /* flags controlling operation */
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int state; /* index into states telling how far along the
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* RAID operation has gotten */
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RF_AccessState_t *states; /* array of states to be run */
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int status; /* pass/fail status of the last operation */
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RF_DagList_t *dagArray; /* array of dag lists, one list per stripe */
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RF_AccessStripeMapHeader_t *asmap; /* the asm for this I/O */
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void *bp; /* buf pointer for this RAID acc. ignored
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* outside the kernel */
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RF_DagHeader_t **paramDAG; /* allows the DAG to be returned to
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* the caller after I/O completion */
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RF_AccessStripeMapHeader_t **paramASM; /* allows the ASM to be
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* returned to the caller
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* after I/O completion */
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RF_AccTraceEntry_t tracerec; /* perf monitoring information for a
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* user access (not for dag stats) */
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void (*callbackFunc) (RF_CBParam_t); /* callback function for this
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* I/O */
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void *callbackArg; /* arg to give to callback func */
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RF_AllocListElem_t *cleanupList; /* memory to be freed at the
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* end of the access */
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RF_RaidAccessDesc_t *next;
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RF_RaidAccessDesc_t *head;
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int numPending;
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RF_DECLARE_MUTEX(mutex) /* these are used to implement
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* blocking I/O */
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RF_DECLARE_COND(cond)
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int async_flag;
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RF_Etimer_t timer; /* used for timing this access */
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};
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#endif /* !_RF__RF_DESC_H_ */
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