Annotation of sys/dev/raidframe/rf_evenodd_dagfuncs.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rf_evenodd_dagfuncs.h,v 1.3 2002/12/16 07:01:04 tdeval Exp $ */
! 2: /* $NetBSD: rf_evenodd_dagfuncs.h,v 1.2 1999/02/05 00:06:11 oster Exp $ */
! 3:
! 4: /*
! 5: * rf_evenodd_dagfuncs.h
! 6: */
! 7: /*
! 8: * Copyright (c) 1996 Carnegie-Mellon University.
! 9: * All rights reserved.
! 10: *
! 11: * Author: Chang-Ming Wu
! 12: *
! 13: * Permission to use, copy, modify and distribute this software and
! 14: * its documentation is hereby granted, provided that both the copyright
! 15: * notice and this permission notice appear in all copies of the
! 16: * software, derivative works or modified versions, and any portions
! 17: * thereof, and that both notices appear in supporting documentation.
! 18: *
! 19: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 20: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 21: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 22: *
! 23: * Carnegie Mellon requests users of this software to return to
! 24: *
! 25: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 26: * School of Computer Science
! 27: * Carnegie Mellon University
! 28: * Pittsburgh PA 15213-3890
! 29: *
! 30: * any improvements or extensions that they make and grant Carnegie the
! 31: * rights to redistribute these changes.
! 32: */
! 33:
! 34: #ifndef _RF__RF_EVENODD_DAGFUNCS_H_
! 35: #define _RF__RF_EVENODD_DAGFUNCS_H_
! 36:
! 37: extern RF_RedFuncs_t rf_EOSmallWriteEFuncs;
! 38: extern RF_RedFuncs_t rf_EOSmallWritePFuncs;
! 39: extern RF_RedFuncs_t rf_eoERecoveryFuncs;
! 40: extern RF_RedFuncs_t rf_eoPRecoveryFuncs;
! 41: extern RF_RedFuncs_t rf_eoERecoveryFuncs;
! 42:
! 43: int rf_RegularPEFunc(RF_DagNode_t *);
! 44: int rf_RegularONEFunc(RF_DagNode_t *);
! 45: int rf_SimpleONEFunc(RF_DagNode_t *);
! 46: void rf_RegularESubroutine(RF_DagNode_t *, char *);
! 47: int rf_RegularEFunc(RF_DagNode_t *);
! 48: void rf_DegrESubroutine(RF_DagNode_t *, char *);
! 49: int rf_Degraded_100_EOFunc(RF_DagNode_t *);
! 50: void rf_e_EncOneSect(RF_RowCol_t, char *, RF_RowCol_t, char *, int);
! 51: void rf_e_encToBuf(RF_Raid_t *, RF_RowCol_t, char *, RF_RowCol_t, char *, int);
! 52: int rf_RecoveryEFunc(RF_DagNode_t *);
! 53: int rf_EO_DegradedWriteEFunc(RF_DagNode_t *);
! 54: void rf_doubleEOdecode(RF_Raid_t *, char **, char **, RF_RowCol_t *,
! 55: char *, char *);
! 56: int rf_EvenOddDoubleRecoveryFunc(RF_DagNode_t *);
! 57: int rf_EOWriteDoubleRecoveryFunc(RF_DagNode_t *);
! 58:
! 59: #define rf_EUCol(_layoutPtr_,_addr_) \
! 60: ((_addr_) % ((_layoutPtr_)->dataSectorsPerStripe)) / \
! 61: ((_layoutPtr_)->sectorsPerStripeUnit)
! 62:
! 63: #define rf_EO_Mod(_int1_,_int2_) \
! 64: (((_int1_) < 0) ? (((_int1_) + (_int2_)) % (_int2_)) \
! 65: : ((_int1_) % (_int2_)))
! 66:
! 67: #define rf_OffsetOfNextEUBoundary(_offset_, sec_per_eu) \
! 68: ((_offset_) / (sec_per_eu) + 1) * (sec_per_eu)
! 69:
! 70: #define RF_EO_MATRIX_DIM 17
! 71:
! 72: /*
! 73: * RF_EO_MATRIX_DIM should be a prime number: and "bytesPerSector" should be
! 74: * divisible by (RF_EO_MATRIX_DIM - 1) to fully encode and utilize the space
! 75: * in a sector, this number could also be 17. That later case doesn't apply
! 76: * for disk array larger than 17 columns totally.
! 77: */
! 78:
! 79: #endif /* !_RF__RF_EVENODD_DAGFUNCS_H_ */
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