80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/* $NetBSD: rf_evenodd_dagfuncs.h,v 1.3 2003/02/05 00:02:38 perry Exp $ */
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/*
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* rf_evenodd_dagfuncs.h
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*/
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/*
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* Copyright (c) 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chang-Ming Wu
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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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#ifndef _RF__RF_EVENODD_DAGFUNCS_H_
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#define _RF__RF_EVENODD_DAGFUNCS_H_
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extern RF_RedFuncs_t rf_EOSmallWriteEFuncs;
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extern RF_RedFuncs_t rf_EOSmallWritePFuncs;
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extern RF_RedFuncs_t rf_eoERecoveryFuncs;
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extern RF_RedFuncs_t rf_eoPRecoveryFuncs;
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extern RF_RedFuncs_t rf_eoERecoveryFuncs;
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int rf_RegularPEFunc(RF_DagNode_t * node);
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int rf_RegularONEFunc(RF_DagNode_t * node);
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int rf_SimpleONEFunc(RF_DagNode_t * node);
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void rf_RegularESubroutine(RF_DagNode_t * node, char *ebuf);
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int rf_RegularEFunc(RF_DagNode_t * node);
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void rf_DegrESubroutine(RF_DagNode_t * node, char *ebuf);
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int rf_Degraded_100_EOFunc(RF_DagNode_t * node);
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void
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rf_e_EncOneSect(RF_RowCol_t srcLogicCol, char *srcSecbuf,
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RF_RowCol_t destLogicCol, char *destSecbuf, int bytesPerSector);
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void
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rf_e_encToBuf(RF_Raid_t * raidPtr, RF_RowCol_t srcLogicCol,
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char *srcbuf, RF_RowCol_t destLogicCol, char *destbuf, int numSector);
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int rf_RecoveryEFunc(RF_DagNode_t * node);
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int rf_EO_DegradedWriteEFunc(RF_DagNode_t * node);
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void
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rf_doubleEOdecode(RF_Raid_t * raidPtr, char **rrdbuf, char **dest,
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RF_RowCol_t * fcol, char *pbuf, char *ebuf);
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int rf_EvenOddDoubleRecoveryFunc(RF_DagNode_t * node);
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int rf_EOWriteDoubleRecoveryFunc(RF_DagNode_t * node);
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#define rf_EUCol(_layoutPtr_, _addr_ ) \
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( (_addr_)%( (_layoutPtr_)->dataSectorsPerStripe ) )/((_layoutPtr_)->sectorsPerStripeUnit)
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#define rf_EO_Mod( _int1_, _int2_ ) \
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( ((_int1_) < 0)? (((_int1_)+(_int2_))%(_int2_)) : (_int1_)%(_int2_) )
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#define rf_OffsetOfNextEUBoundary(_offset_, sec_per_eu) ((_offset_)/(sec_per_eu) + 1)*(sec_per_eu)
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#define RF_EO_MATRIX_DIM 17
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/*
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* RF_EO_MATRIX_DIM should be a prime number: and "bytesPerSector" should be
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* dividable by ( RF_EO_MATRIX_DIM - 1) to fully encode and use the space
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* in a sector, this number could also be 17. Tha later case doesn't apply
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* for disk array larger than 17 columns totally.
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*/
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#endif /* !_RF__RF_EVENODD_DAGFUNCS_H_ */
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