c63dab466c
Also some minor style cleanups.
192 lines
6.1 KiB
C
192 lines
6.1 KiB
C
/* $NetBSD: rf_evenodd_dags.c,v 1.2 1999/02/05 00:06:11 oster Exp $ */
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
/*
|
|
* rf_evenodd_dags.c
|
|
*/
|
|
/*
|
|
* Copyright (c) 1996 Carnegie-Mellon University.
|
|
* All rights reserved.
|
|
*
|
|
* Author: Chang-Ming Wu
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <dev/raidframe/rf_archs.h>
|
|
|
|
#if RF_INCLUDE_EVENODD > 0
|
|
|
|
#include <dev/raidframe/rf_types.h>
|
|
#include <dev/raidframe/rf_raid.h>
|
|
#include <dev/raidframe/rf_dag.h>
|
|
#include <dev/raidframe/rf_dagfuncs.h>
|
|
#include <dev/raidframe/rf_dagutils.h>
|
|
#include <dev/raidframe/rf_etimer.h>
|
|
#include <dev/raidframe/rf_acctrace.h>
|
|
#include <dev/raidframe/rf_general.h>
|
|
#include <dev/raidframe/rf_evenodd_dags.h>
|
|
#include <dev/raidframe/rf_evenodd.h>
|
|
#include <dev/raidframe/rf_evenodd_dagfuncs.h>
|
|
#include <dev/raidframe/rf_pq.h>
|
|
#include <dev/raidframe/rf_dagdegrd.h>
|
|
#include <dev/raidframe/rf_dagdegwr.h>
|
|
#include <dev/raidframe/rf_dagffwr.h>
|
|
|
|
|
|
/*
|
|
* Lost one data.
|
|
* Use P to reconstruct missing data.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_100_CreateReadDAG)
|
|
{
|
|
rf_CreateDegradedReadDAG(raidPtr, asmap, dag_h, bp, flags, allocList, &rf_eoPRecoveryFuncs);
|
|
}
|
|
/*
|
|
* Lost data + E.
|
|
* Use P to reconstruct missing data.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_101_CreateReadDAG)
|
|
{
|
|
rf_CreateDegradedReadDAG(raidPtr, asmap, dag_h, bp, flags, allocList, &rf_eoPRecoveryFuncs);
|
|
}
|
|
/*
|
|
* Lost data + P.
|
|
* Make E look like P, and use Eor for Xor, and we can
|
|
* use degraded read DAG.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_110_CreateReadDAG)
|
|
{
|
|
RF_PhysDiskAddr_t *temp;
|
|
/* swap P and E pointers to fake out the DegradedReadDAG code */
|
|
temp = asmap->parityInfo;
|
|
asmap->parityInfo = asmap->qInfo;
|
|
asmap->qInfo = temp;
|
|
rf_CreateDegradedReadDAG(raidPtr, asmap, dag_h, bp, flags, allocList, &rf_eoERecoveryFuncs);
|
|
}
|
|
/*
|
|
* Lost two data.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EOCreateDoubleDegradedReadDAG)
|
|
{
|
|
rf_EO_DoubleDegRead(raidPtr, asmap, dag_h, bp, flags, allocList);
|
|
}
|
|
/*
|
|
* Lost two data.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_200_CreateReadDAG)
|
|
{
|
|
rf_EOCreateDoubleDegradedReadDAG(raidPtr, asmap, dag_h, bp, flags, allocList);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_100_CreateWriteDAG)
|
|
{
|
|
if (asmap->numStripeUnitsAccessed != 1 &&
|
|
asmap->failedPDAs[0]->numSector != raidPtr->Layout.sectorsPerStripeUnit)
|
|
RF_PANIC();
|
|
rf_CommonCreateSimpleDegradedWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, 2, (int (*) (RF_DagNode_t *)) rf_Degraded_100_EOFunc, RF_TRUE);
|
|
}
|
|
/*
|
|
* E is dead. Small write.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_001_CreateSmallWriteDAG)
|
|
{
|
|
rf_CommonCreateSmallWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, &rf_EOSmallWritePFuncs, NULL);
|
|
}
|
|
/*
|
|
* E is dead. Large write.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_001_CreateLargeWriteDAG)
|
|
{
|
|
rf_CommonCreateLargeWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, 1, rf_RegularPFunc, RF_TRUE);
|
|
}
|
|
/*
|
|
* P is dead. Small write.
|
|
* Swap E + P, use single-degraded stuff.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_010_CreateSmallWriteDAG)
|
|
{
|
|
RF_PhysDiskAddr_t *temp;
|
|
/* swap P and E pointers to fake out the DegradedReadDAG code */
|
|
temp = asmap->parityInfo;
|
|
asmap->parityInfo = asmap->qInfo;
|
|
asmap->qInfo = temp;
|
|
rf_CommonCreateSmallWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, &rf_EOSmallWriteEFuncs, NULL);
|
|
}
|
|
/*
|
|
* P is dead. Large write.
|
|
* Swap E + P, use single-degraded stuff.
|
|
*/
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_010_CreateLargeWriteDAG)
|
|
{
|
|
RF_PhysDiskAddr_t *temp;
|
|
/* swap P and E pointers to fake out the code */
|
|
temp = asmap->parityInfo;
|
|
asmap->parityInfo = asmap->qInfo;
|
|
asmap->qInfo = temp;
|
|
rf_CommonCreateLargeWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, 1, rf_RegularEFunc, RF_FALSE);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_011_CreateWriteDAG)
|
|
{
|
|
rf_CreateNonRedundantWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList,
|
|
RF_IO_TYPE_WRITE);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_110_CreateWriteDAG)
|
|
{
|
|
RF_PhysDiskAddr_t *temp;
|
|
|
|
if (asmap->numStripeUnitsAccessed != 1 &&
|
|
asmap->failedPDAs[0]->numSector != raidPtr->Layout.sectorsPerStripeUnit) {
|
|
RF_PANIC();
|
|
}
|
|
/* swap P and E to fake out parity code */
|
|
temp = asmap->parityInfo;
|
|
asmap->parityInfo = asmap->qInfo;
|
|
asmap->qInfo = temp;
|
|
rf_CommonCreateSimpleDegradedWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, 1, (int (*) (RF_DagNode_t *)) rf_EO_DegradedWriteEFunc, RF_FALSE);
|
|
/* is the regular E func the right one to call? */
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_101_CreateWriteDAG)
|
|
{
|
|
if (asmap->numStripeUnitsAccessed != 1 &&
|
|
asmap->failedPDAs[0]->numSector != raidPtr->Layout.sectorsPerStripeUnit)
|
|
RF_PANIC();
|
|
rf_CommonCreateSimpleDegradedWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, 1, rf_RecoveryXorFunc, RF_TRUE);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_DoubleDegRead)
|
|
{
|
|
rf_DoubleDegRead(raidPtr, asmap, dag_h, bp, flags, allocList,
|
|
"Re", "EvenOddRecovery", rf_EvenOddDoubleRecoveryFunc);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EOCreateSmallWriteDAG)
|
|
{
|
|
rf_CommonCreateSmallWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, &rf_pFuncs, &rf_EOSmallWriteEFuncs);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EOCreateLargeWriteDAG)
|
|
{
|
|
rf_CommonCreateLargeWriteDAG(raidPtr, asmap, dag_h, bp, flags, allocList, 2, rf_RegularPEFunc, RF_FALSE);
|
|
}
|
|
RF_CREATE_DAG_FUNC_DECL(rf_EO_200_CreateWriteDAG)
|
|
{
|
|
rf_DoubleDegSmallWrite(raidPtr, asmap, dag_h, bp, flags, allocList, "Re", "We", "EOWrDDRecovery", rf_EOWriteDoubleRecoveryFunc);
|
|
}
|
|
#endif /* RF_INCLUDE_EVENODD > 0 */
|