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rf_parityscan.h revision 1.2 
      1 /*	$NetBSD: rf_parityscan.h,v 1.2 1999/01/26 02:34:00 oster 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 "rf_types.h"
     33 #include "rf_alloclist.h"
     34 
     35 int rf_RewriteParity(RF_Raid_t *raidPtr);
     36 int rf_VerifyParityBasic(RF_Raid_t *raidPtr, RF_RaidAddr_t raidAddr,
     37 	RF_PhysDiskAddr_t *parityPDA, int correct_it, RF_RaidAccessFlags_t flags);
     38 int rf_VerifyParity(RF_Raid_t *raidPtr, RF_AccessStripeMap_t *stripeMap,
     39 	int correct_it, RF_RaidAccessFlags_t flags);
     40 int rf_TryToRedirectPDA(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *pda, int parity);
     41 int rf_VerifyDegrModeWrite(RF_Raid_t *raidPtr, RF_AccessStripeMapHeader_t *asmh);
     42 RF_DagHeader_t *rf_MakeSimpleDAG(RF_Raid_t *raidPtr, int nNodes,
     43 				 int bytesPerSU, char *databuf,
     44 				 int (*doFunc)(RF_DagNode_t *),
     45 				 int (*undoFunc)(RF_DagNode_t *),
     46 				 char *name, RF_AllocListElem_t *alloclist,
     47 				 RF_RaidAccessFlags_t flags, int priority);
     48 
     49 #define RF_DO_CORRECT_PARITY   1
     50 #define RF_DONT_CORRECT_PARITY 0
     51 
     52 /*
     53  * Return vals for VerifyParity operation
     54  *
     55  * Ordering is important here.
     56  */
     57 #define RF_PARITY_OKAY               0 /* or no parity information */
     58 #define RF_PARITY_CORRECTED          1
     59 #define RF_PARITY_BAD                2
     60 #define RF_PARITY_COULD_NOT_CORRECT  3
     61 #define RF_PARITY_COULD_NOT_VERIFY   4
     62 
     63 #endif /* !_RF__RF_PARITYSCAN_H_ */
     64