diff options
Diffstat (limited to 'sys/dev/raidframe/rf_evenodd_dagfuncs.h')
| -rw-r--r-- | sys/dev/raidframe/rf_evenodd_dagfuncs.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sys/dev/raidframe/rf_evenodd_dagfuncs.h b/sys/dev/raidframe/rf_evenodd_dagfuncs.h new file mode 100644 index 00000000000..9773e57cedd --- /dev/null +++ b/sys/dev/raidframe/rf_evenodd_dagfuncs.h @@ -0,0 +1,77 @@ +/* $OpenBSD: rf_evenodd_dagfuncs.h,v 1.1 1999/01/11 14:29:22 niklas Exp $ */ +/* $NetBSD: rf_evenodd_dagfuncs.h,v 1.1 1998/11/13 04:20:29 oster Exp $ */ +/* + * rf_evenodd_dagfuncs.h + */ +/* + * 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. + */ + +#ifndef _RF__RF_EVENODD_DAGFUNCS_H_ +#define _RF__RF_EVENODD_DAGFUNCS_H_ + +extern RF_RedFuncs_t rf_EOSmallWriteEFuncs; +extern RF_RedFuncs_t rf_EOSmallWritePFuncs; +extern RF_RedFuncs_t rf_eoERecoveryFuncs; +extern RF_RedFuncs_t rf_eoPRecoveryFuncs; +extern RF_RedFuncs_t rf_eoERecoveryFuncs; + +int rf_RegularPEFunc(RF_DagNode_t *node); +int rf_RegularONEFunc(RF_DagNode_t *node); +int rf_SimpleONEFunc(RF_DagNode_t *node); +void rf_RegularESubroutine(RF_DagNode_t *node, char *ebuf); +int rf_RegularEFunc(RF_DagNode_t *node); +void rf_DegrESubroutine(RF_DagNode_t *node, char *ebuf); +int rf_Degraded_100_EOFunc(RF_DagNode_t *node); +void rf_e_EncOneSect(RF_RowCol_t srcLogicCol, char *srcSecbuf, + RF_RowCol_t destLogicCol, char *destSecbuf, int bytesPerSector); +void rf_e_encToBuf(RF_Raid_t *raidPtr, RF_RowCol_t srcLogicCol, + char *srcbuf, RF_RowCol_t destLogicCol, char *destbuf, int numSector); +int rf_RecoveryEFunc(RF_DagNode_t *node); +int rf_EO_DegradedWriteEFunc(RF_DagNode_t *node); +void rf_doubleEOdecode(RF_Raid_t *raidPtr, char **rrdbuf, char **dest, + RF_RowCol_t *fcol, char *pbuf, char *ebuf); +int rf_EvenOddDoubleRecoveryFunc(RF_DagNode_t *node); +int rf_EOWriteDoubleRecoveryFunc(RF_DagNode_t *node); + +#define rf_EUCol(_layoutPtr_, _addr_ ) \ +( (_addr_)%( (_layoutPtr_)->dataSectorsPerStripe ) )/((_layoutPtr_)->sectorsPerStripeUnit) + +#define rf_EO_Mod( _int1_, _int2_ ) \ +( ((_int1_) < 0)? (((_int1_)+(_int2_))%(_int2_)) : (_int1_)%(_int2_) ) + +#define rf_OffsetOfNextEUBoundary(_offset_, sec_per_eu) ((_offset_)/(sec_per_eu) + 1)*(sec_per_eu) + +#define RF_EO_MATRIX_DIM 17 + +/* + * RF_EO_MATRIX_DIM should be a prime number: and "bytesPerSector" should be + * dividable by ( RF_EO_MATRIX_DIM - 1) to fully encode and utilize the space + * in a sector, this number could also be 17. Tha later case doesn't apply + * for disk array larger than 17 columns totally. + */ + +#endif /* !_RF__RF_EVENODD_DAGFUNCS_H_ */ |