38a3987b69
Carnegie Mellon University. Full RAID implementation, including levels 0, 1, 4, 5, 6, parity logging, and a few other goodies. Ported to NetBSD by Greg Oster.
242 lines
7.1 KiB
C
242 lines
7.1 KiB
C
/* $NetBSD: rf_raid0.c,v 1.1 1998/11/13 04:20:33 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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/*
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* :
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* Log: rf_raid0.c,v
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* Revision 1.24 1996/07/31 16:56:18 jimz
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* dataBytesPerStripe, sectorsPerDisk init arch-indep.
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*
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* Revision 1.23 1996/07/27 23:36:08 jimz
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* Solaris port of simulator
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*
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* Revision 1.22 1996/07/18 22:57:14 jimz
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* port simulator to AIX
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*
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* Revision 1.21 1996/06/19 22:07:34 jimz
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* added parity verify
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*
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* Revision 1.20 1996/06/17 14:38:33 jimz
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* properly #if out RF_DEMO code
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* fix bug in MakeConfig that was causing weird behavior
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* in configuration routines (config was not zeroed at start)
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* clean up genplot handling of stacks
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*
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* Revision 1.19 1996/06/10 11:55:47 jimz
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* Straightened out some per-array/not-per-array distinctions, fixed
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* a couple bugs related to confusion. Added shutdown lists. Removed
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* layout shutdown function (now subsumed by shutdown lists).
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*
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* Revision 1.18 1996/06/07 22:26:27 jimz
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* type-ify which_ru (RF_ReconUnitNum_t)
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*
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* Revision 1.17 1996/06/07 21:33:04 jimz
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* begin using consistent types for sector numbers,
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* stripe numbers, row+col numbers, recon unit numbers
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*
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* Revision 1.16 1996/06/03 23:28:26 jimz
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* more bugfixes
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* check in tree to sync for IPDS runs with current bugfixes
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* there still may be a problem with threads in the script test
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* getting I/Os stuck- not trivially reproducible (runs ~50 times
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* in a row without getting stuck)
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*
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* Revision 1.15 1996/05/31 22:26:54 jimz
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* fix a lot of mapping problems, memory allocation problems
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* found some weird lock issues, fixed 'em
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* more code cleanup
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*
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* Revision 1.14 1996/05/27 18:56:37 jimz
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* more code cleanup
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* better typing
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* compiles in all 3 environments
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*
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* Revision 1.13 1996/05/24 22:17:04 jimz
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* continue code + namespace cleanup
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* typed a bunch of flags
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*
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* Revision 1.12 1996/05/24 01:59:45 jimz
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* another checkpoint in code cleanup for release
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* time to sync kernel tree
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*
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* Revision 1.11 1996/05/18 19:51:34 jimz
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* major code cleanup- fix syntax, make some types consistent,
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* add prototypes, clean out dead code, et cetera
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*
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* Revision 1.10 1996/05/03 19:37:32 wvcii
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* moved dag creation routines to dag library
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*
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* Revision 1.9 1995/12/12 18:10:06 jimz
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* MIN -> RF_MIN, MAX -> RF_MAX, ASSERT -> RF_ASSERT
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* fix 80-column brain damage in comments
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*
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* Revision 1.8 1995/12/06 15:06:36 root
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* added copyright info
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*
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* Revision 1.7 1995/11/17 18:57:15 wvcii
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* added prototypint to MapParity
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*
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* Revision 1.6 1995/11/16 13:53:51 wvcii
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* fixed bug in CreateRAID0WriteDAG prototype
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*
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* Revision 1.5 1995/11/07 15:22:01 wvcii
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* changed RAID0DagSelect prototype
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* function no longer generates numHdrSucc, numTermAnt
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*
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* Revision 1.4 1995/06/23 13:39:17 robby
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* updeated to prototypes in rf_layout.h
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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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