1eecf8e491
out-dated comments, and other unneeded stuff. This helps prepare for cleaning up the rest of the code, and adding new functionality. No functional changes to the kernel code in this commit.
155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/* $NetBSD: rf_raid0.c,v 1.2 1999/01/26 02:34:00 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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/***************************************
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*
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* rf_raid0.c -- implements RAID Level 0
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*
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***************************************/
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#include "rf_types.h"
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#include "rf_raid.h"
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#include "rf_raid0.h"
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#include "rf_dag.h"
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#include "rf_dagffrd.h"
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#include "rf_dagffwr.h"
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#include "rf_dagutils.h"
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#include "rf_dagfuncs.h"
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#include "rf_threadid.h"
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#include "rf_general.h"
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#include "rf_configure.h"
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#include "rf_parityscan.h"
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typedef struct RF_Raid0ConfigInfo_s {
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RF_RowCol_t *stripeIdentifier;
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} RF_Raid0ConfigInfo_t;
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int rf_ConfigureRAID0(
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RF_ShutdownList_t **listp,
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RF_Raid_t *raidPtr,
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RF_Config_t *cfgPtr)
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{
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RF_RaidLayout_t *layoutPtr = &raidPtr->Layout;
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RF_Raid0ConfigInfo_t *info;
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RF_RowCol_t i;
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/* create a RAID level 0 configuration structure */
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RF_MallocAndAdd(info, sizeof(RF_Raid0ConfigInfo_t), (RF_Raid0ConfigInfo_t *), raidPtr->cleanupList);
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if (info == NULL)
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return(ENOMEM);
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layoutPtr->layoutSpecificInfo = (void *)info;
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RF_MallocAndAdd(info->stripeIdentifier, raidPtr->numCol * sizeof(RF_RowCol_t), (RF_RowCol_t *), raidPtr->cleanupList);
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if (info->stripeIdentifier == NULL)
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return(ENOMEM);
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for (i=0; i<raidPtr->numCol; i++)
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info->stripeIdentifier[i] = i;
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RF_ASSERT(raidPtr->numRow == 1);
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raidPtr->totalSectors = layoutPtr->stripeUnitsPerDisk * raidPtr->numCol * layoutPtr->sectorsPerStripeUnit;
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layoutPtr->numStripe = layoutPtr->stripeUnitsPerDisk;
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layoutPtr->dataSectorsPerStripe = raidPtr->numCol * layoutPtr->sectorsPerStripeUnit;
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layoutPtr->bytesPerStripeUnit = layoutPtr->sectorsPerStripeUnit << raidPtr->logBytesPerSector;
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layoutPtr->numDataCol = raidPtr->numCol;
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layoutPtr->numParityCol = 0;
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return(0);
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}
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void rf_MapSectorRAID0(
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RF_Raid_t *raidPtr,
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RF_RaidAddr_t raidSector,
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RF_RowCol_t *row,
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RF_RowCol_t *col,
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RF_SectorNum_t *diskSector,
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int remap)
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{
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RF_StripeNum_t SUID = raidSector / raidPtr->Layout.sectorsPerStripeUnit;
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*row = 0;
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*col = SUID % raidPtr->numCol;
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*diskSector = (SUID / raidPtr->numCol) * raidPtr->Layout.sectorsPerStripeUnit +
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(raidSector % raidPtr->Layout.sectorsPerStripeUnit);
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}
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void rf_MapParityRAID0(
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RF_Raid_t *raidPtr,
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RF_RaidAddr_t raidSector,
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RF_RowCol_t *row,
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RF_RowCol_t *col,
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RF_SectorNum_t *diskSector,
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int remap)
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{
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*row = *col = 0;
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*diskSector = 0;
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}
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void rf_IdentifyStripeRAID0(
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RF_Raid_t *raidPtr,
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RF_RaidAddr_t addr,
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RF_RowCol_t **diskids,
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RF_RowCol_t *outRow)
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{
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RF_Raid0ConfigInfo_t *info;
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info = raidPtr->Layout.layoutSpecificInfo;
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*diskids = info->stripeIdentifier;
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*outRow = 0;
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}
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void rf_MapSIDToPSIDRAID0(
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RF_RaidLayout_t *layoutPtr,
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RF_StripeNum_t stripeID,
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RF_StripeNum_t *psID,
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RF_ReconUnitNum_t *which_ru)
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{
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*which_ru = 0;
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*psID = stripeID;
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}
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void rf_RAID0DagSelect(
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RF_Raid_t *raidPtr,
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RF_IoType_t type,
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RF_AccessStripeMap_t *asmap,
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RF_VoidFuncPtr *createFunc)
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{
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*createFunc = ((type == RF_IO_TYPE_READ) ?
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(RF_VoidFuncPtr)rf_CreateFaultFreeReadDAG : (RF_VoidFuncPtr)rf_CreateRAID0WriteDAG);
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}
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int rf_VerifyParityRAID0(
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RF_Raid_t *raidPtr,
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RF_RaidAddr_t raidAddr,
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RF_PhysDiskAddr_t *parityPDA,
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int correct_it,
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RF_RaidAccessFlags_t flags)
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{
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/*
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* No parity is always okay.
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*/
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return(RF_PARITY_OKAY);
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}
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