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      1 /*	$NetBSD: rf_parityscan.h,v 1.9 2019/10/10 03:43:59 christos Exp $	*/
      2 /*
      3  * Copyright (c) 1995 Carnegie-Mellon University.
      4  * All rights reserved.
      5  *
      6  * Author: Mark Holland
      7  *
      8  * Permission to use, copy, modify and distribute this software and
      9  * its documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie the
     26  * rights to redistribute these changes.
     27  */
     28 
     29 #ifndef _RF__RF_PARITYSCAN_H_
     30 #define _RF__RF_PARITYSCAN_H_
     31 
     32 #include <dev/raidframe/raidframevar.h>
     33 
     34 #include "rf_alloclist.h"
     35 
     36 int     rf_RewriteParity(RF_Raid_t *);
     37 int	rf_RewriteParityRange(RF_Raid_t *, RF_SectorNum_t, RF_SectorNum_t);
     38 int 	rf_VerifyParityBasic(RF_Raid_t *, RF_RaidAddr_t, RF_PhysDiskAddr_t *,
     39     int, RF_RaidAccessFlags_t);
     40 int	rf_VerifyParity(RF_Raid_t *, RF_AccessStripeMap_t *, int,
     41     RF_RaidAccessFlags_t);
     42 int     rf_TryToRedirectPDA(RF_Raid_t *, RF_PhysDiskAddr_t *, int);
     43 int     rf_VerifyDegrModeWrite(RF_Raid_t *, RF_AccessStripeMapHeader_t *);
     44 RF_DagHeader_t *rf_MakeSimpleDAG(RF_Raid_t *, int, int, char *,
     45     void (*)(RF_DagNode_t *), void (*) (RF_DagNode_t *), const char *,
     46     RF_AllocListElem_t *, RF_RaidAccessFlags_t, int);
     47 
     48 #define RF_DO_CORRECT_PARITY   1
     49 #define RF_DONT_CORRECT_PARITY 0
     50 
     51 /*
     52  * Return vals for VerifyParity operation
     53  *
     54  * Ordering is important here.
     55  */
     56 #define RF_PARITY_OKAY               0	/* or no parity information */
     57 #define RF_PARITY_CORRECTED          1
     58 #define RF_PARITY_BAD                2
     59 #define RF_PARITY_COULD_NOT_CORRECT  3
     60 #define RF_PARITY_COULD_NOT_VERIFY   4
     61 
     62 #endif				/* !_RF__RF_PARITYSCAN_H_ */
     63