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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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