diff options
author | scottl <scottl@FreeBSD.org> | 2002-10-20 08:17:39 +0000 |
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committer | scottl <scottl@FreeBSD.org> | 2002-10-20 08:17:39 +0000 |
commit | 710948de69ddeae56bda663219319f6d859aea1f (patch) | |
tree | 71c65823ba2e8591de708d5cb2e990a75135ee11 /sys/dev/raidframe/rf_raid0.c | |
parent | 63bd46464d6d4587c20c1ca62fb6a6e3be132db9 (diff) | |
download | FreeBSD-src-710948de69ddeae56bda663219319f6d859aea1f.zip FreeBSD-src-710948de69ddeae56bda663219319f6d859aea1f.tar.gz |
After much delay and anticipation, welcome RAIDFrame into the FreeBSD
world. This should be considered highly experimental.
Approved-by: re
Diffstat (limited to 'sys/dev/raidframe/rf_raid0.c')
-rw-r--r-- | sys/dev/raidframe/rf_raid0.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/sys/dev/raidframe/rf_raid0.c b/sys/dev/raidframe/rf_raid0.c new file mode 100644 index 0000000..a9418d3 --- /dev/null +++ b/sys/dev/raidframe/rf_raid0.c @@ -0,0 +1,161 @@ +/* $FreeBSD$ */ +/* $NetBSD: rf_raid0.c,v 1.4 2000/01/07 03:41:02 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. + */ + +/*************************************** + * + * rf_raid0.c -- implements RAID Level 0 + * + ***************************************/ + +#include <dev/raidframe/rf_types.h> +#include <dev/raidframe/rf_raid.h> +#include <dev/raidframe/rf_raid0.h> +#include <dev/raidframe/rf_dag.h> +#include <dev/raidframe/rf_dagffrd.h> +#include <dev/raidframe/rf_dagffwr.h> +#include <dev/raidframe/rf_dagutils.h> +#include <dev/raidframe/rf_dagfuncs.h> +#include <dev/raidframe/rf_general.h> +#include <dev/raidframe/rf_configure.h> +#include <dev/raidframe/rf_parityscan.h> + +typedef struct RF_Raid0ConfigInfo_s { + RF_RowCol_t *stripeIdentifier; +} RF_Raid0ConfigInfo_t; + +int +rf_ConfigureRAID0( + RF_ShutdownList_t ** listp, + RF_Raid_t * raidPtr, + RF_Config_t * cfgPtr) +{ + RF_RaidLayout_t *layoutPtr = &raidPtr->Layout; + RF_Raid0ConfigInfo_t *info; + RF_RowCol_t i; + + /* create a RAID level 0 configuration structure */ + RF_MallocAndAdd(info, sizeof(RF_Raid0ConfigInfo_t), (RF_Raid0ConfigInfo_t *), raidPtr->cleanupList); + if (info == NULL) + return (ENOMEM); + layoutPtr->layoutSpecificInfo = (void *) info; + + RF_MallocAndAdd(info->stripeIdentifier, raidPtr->numCol * sizeof(RF_RowCol_t), (RF_RowCol_t *), raidPtr->cleanupList); + if (info->stripeIdentifier == NULL) + return (ENOMEM); + for (i = 0; i < raidPtr->numCol; i++) + info->stripeIdentifier[i] = i; + + RF_ASSERT(raidPtr->numRow == 1); + raidPtr->totalSectors = layoutPtr->stripeUnitsPerDisk * raidPtr->numCol * layoutPtr->sectorsPerStripeUnit; + layoutPtr->numStripe = layoutPtr->stripeUnitsPerDisk; + layoutPtr->dataSectorsPerStripe = raidPtr->numCol * layoutPtr->sectorsPerStripeUnit; + layoutPtr->bytesPerStripeUnit = layoutPtr->sectorsPerStripeUnit << raidPtr->logBytesPerSector; + layoutPtr->numDataCol = raidPtr->numCol; + layoutPtr->numParityCol = 0; + return (0); +} + +void +rf_MapSectorRAID0( + RF_Raid_t * raidPtr, + RF_RaidAddr_t raidSector, + RF_RowCol_t * row, + RF_RowCol_t * col, + RF_SectorNum_t * diskSector, + int remap) +{ + RF_StripeNum_t SUID = raidSector / raidPtr->Layout.sectorsPerStripeUnit; + *row = 0; + *col = SUID % raidPtr->numCol; + *diskSector = (SUID / raidPtr->numCol) * raidPtr->Layout.sectorsPerStripeUnit + + (raidSector % raidPtr->Layout.sectorsPerStripeUnit); +} + +void +rf_MapParityRAID0( + RF_Raid_t * raidPtr, + RF_RaidAddr_t raidSector, + RF_RowCol_t * row, + RF_RowCol_t * col, + RF_SectorNum_t * diskSector, + int remap) +{ + *row = *col = 0; + *diskSector = 0; +} + +void +rf_IdentifyStripeRAID0( + RF_Raid_t * raidPtr, + RF_RaidAddr_t addr, + RF_RowCol_t ** diskids, + RF_RowCol_t * outRow) +{ + RF_Raid0ConfigInfo_t *info; + + info = raidPtr->Layout.layoutSpecificInfo; + *diskids = info->stripeIdentifier; + *outRow = 0; +} + +void +rf_MapSIDToPSIDRAID0( + RF_RaidLayout_t * layoutPtr, + RF_StripeNum_t stripeID, + RF_StripeNum_t * psID, + RF_ReconUnitNum_t * which_ru) +{ + *which_ru = 0; + *psID = stripeID; +} + +void +rf_RAID0DagSelect( + RF_Raid_t * raidPtr, + RF_IoType_t type, + RF_AccessStripeMap_t * asmap, + RF_VoidFuncPtr * createFunc) +{ + *createFunc = ((type == RF_IO_TYPE_READ) ? + (RF_VoidFuncPtr) rf_CreateFaultFreeReadDAG : (RF_VoidFuncPtr) rf_CreateRAID0WriteDAG); +} + +int +rf_VerifyParityRAID0( + RF_Raid_t * raidPtr, + RF_RaidAddr_t raidAddr, + RF_PhysDiskAddr_t * parityPDA, + int correct_it, + RF_RaidAccessFlags_t flags) +{ + /* + * No parity is always okay. + */ + return (RF_PARITY_OKAY); +} |