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/* $OpenBSD: rf_desc.h,v 1.6 2002/12/16 07:01:03 tdeval Exp $ */
/* $NetBSD: rf_desc.h,v 1.5 2000/01/09 00:00:18 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.
*/
#ifndef _RF__RF_DESC_H_
#define _RF__RF_DESC_H_
#include "rf_archs.h"
#include "rf_types.h"
#include "rf_etimer.h"
#include "rf_dag.h"
struct RF_RaidReconDesc_s {
RF_Raid_t *raidPtr; /* Raid device descriptor. */
RF_RowCol_t row; /* Row of failed disk. */
RF_RowCol_t col; /* Col of failed disk. */
int state; /*
* How far along the reconstruction
* operation has gotten.
*/
RF_RaidDisk_t *spareDiskPtr; /*
* Describes target disk for recon.
* (not used in dist sparing)
*/
int numDisksDone; /*
* The number of surviving disks that
* have completed their work.
*/
RF_RowCol_t srow; /*
* Row ID of the spare disk.
* (not used in dist sparing)
*/
RF_RowCol_t scol; /*
* Col ID of the spare disk.
* (not used in dist sparing)
*/
/*
* Prevent recon from hogging CPU
*/
RF_Etimer_t recon_exec_timer;
RF_uint64 reconExecTimerRunning;
RF_uint64 reconExecTicks;
RF_uint64 maxReconExecTicks;
#if RF_RECON_STATS > 0
RF_uint64 hsStallCount; /* Head sep stall count. */
RF_uint64 numReconExecDelays;
RF_uint64 numReconEventWaits;
#endif /* RF_RECON_STATS > 0 */
RF_RaidReconDesc_t *next;
};
struct RF_RaidAccessDesc_s {
RF_Raid_t *raidPtr; /* Raid device descriptor. */
RF_IoType_t type; /* Read or write. */
RF_RaidAddr_t raidAddress; /*
* Starting address in raid address
* space.
*/
RF_SectorCount_t numBlocks; /*
* Number of blocks (sectors)
* to transfer.
*/
RF_StripeCount_t numStripes; /*
* Number of stripes involved in
* access.
*/
caddr_t bufPtr; /* Pointer to data buffer. */
RF_RaidAccessFlags_t flags; /* Flags controlling operation. */
int state; /*
* Index into states telling how far
* along the RAID operation has gotten.
*/
RF_AccessState_t *states; /* Array of states to be run. */
int status; /*
* Pass/fail status of the last
* operation.
*/
RF_DagList_t *dagArray; /*
* Array of DAG lists, one list
* per stripe.
*/
RF_AccessStripeMapHeader_t *asmap; /* The asm for this I/O. */
void *bp; /*
* Buffer pointer for this RAID acc.
* Ignored outside the kernel.
*/
RF_DagHeader_t **paramDAG; /*
* Allows the DAG to be returned to
* the caller after I/O completion.
*/
RF_AccessStripeMapHeader_t **paramASM; /*
* Allows the ASM to be
* returned to the caller
* after I/O completion.
*/
RF_AccTraceEntry_t tracerec; /*
* Perf monitoring information for a
* user access (not for dag stats).
*/
void (*callbackFunc) (RF_CBParam_t);
/* Callback function for this I/O. */
void *callbackArg; /* Arg to give to callback func. */
RF_AllocListElem_t *cleanupList; /*
* Memory to be freed at the
* end of the access.
*/
RF_RaidAccessDesc_t *next;
RF_RaidAccessDesc_t *head;
int numPending;
RF_DECLARE_MUTEX( mutex ); /*
* These are used to implement
* blocking I/O.
*/
RF_DECLARE_COND( cond );
int async_flag;
RF_Etimer_t timer; /* Used for timing this access. */
};
#endif /* ! _RF__RF_DESC_H_ */
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