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rf_parityscan.h revision 1.1 
      1 /*	$NetBSD: rf_parityscan.h,v 1.1 1998/11/13 04:20:32 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 /* :
     30  * Log: rf_parityscan.h,v
     31  * Revision 1.14  1996/07/05 18:01:12  jimz
     32  * don't make parity protos ndef KERNEL
     33  *
     34  * Revision 1.13  1996/06/20  17:41:43  jimz
     35  * change decl for VerifyParity
     36  *
     37  * Revision 1.12  1996/06/20  15:38:39  jimz
     38  * renumber parityscan return codes
     39  *
     40  * Revision 1.11  1996/06/19  22:23:01  jimz
     41  * parity verification is now a layout-configurable thing
     42  * not all layouts currently support it (correctly, anyway)
     43  *
     44  * Revision 1.10  1996/06/09  02:36:46  jimz
     45  * lots of little crufty cleanup- fixup whitespace
     46  * issues, comment #ifdefs, improve typing in some
     47  * places (esp size-related)
     48  *
     49  * Revision 1.9  1996/06/07  21:33:04  jimz
     50  * begin using consistent types for sector numbers,
     51  * stripe numbers, row+col numbers, recon unit numbers
     52  *
     53  * Revision 1.8  1996/06/02  17:31:48  jimz
     54  * Moved a lot of global stuff into array structure, where it belongs.
     55  * Fixed up paritylogging, pss modules in this manner. Some general
     56  * code cleanup. Removed lots of dead code, some dead files.
     57  *
     58  * Revision 1.7  1996/05/31  22:26:54  jimz
     59  * fix a lot of mapping problems, memory allocation problems
     60  * found some weird lock issues, fixed 'em
     61  * more code cleanup
     62  *
     63  * Revision 1.6  1996/05/24  22:17:04  jimz
     64  * continue code + namespace cleanup
     65  * typed a bunch of flags
     66  *
     67  * Revision 1.5  1996/05/24  04:28:55  jimz
     68  * release cleanup ckpt
     69  *
     70  * Revision 1.4  1996/05/23  21:46:35  jimz
     71  * checkpoint in code cleanup (release prep)
     72  * lots of types, function names have been fixed
     73  *
     74  * Revision 1.3  1996/05/18  19:51:34  jimz
     75  * major code cleanup- fix syntax, make some types consistent,
     76  * add prototypes, clean out dead code, et cetera
     77  *
     78  * Revision 1.2  1995/11/30  16:20:46  wvcii
     79  * added copyright info
     80  *
     81  */
     82 
     83 #ifndef _RF__RF_PARITYSCAN_H_
     84 #define _RF__RF_PARITYSCAN_H_
     85 
     86 #include "rf_types.h"
     87 #include "rf_alloclist.h"
     88 
     89 int rf_RewriteParity(RF_Raid_t *raidPtr);
     90 int rf_VerifyParityBasic(RF_Raid_t *raidPtr, RF_RaidAddr_t raidAddr,
     91 	RF_PhysDiskAddr_t *parityPDA, int correct_it, RF_RaidAccessFlags_t flags);
     92 int rf_VerifyParity(RF_Raid_t *raidPtr, RF_AccessStripeMap_t *stripeMap,
     93 	int correct_it, RF_RaidAccessFlags_t flags);
     94 int rf_TryToRedirectPDA(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *pda, int parity);
     95 int rf_VerifyDegrModeWrite(RF_Raid_t *raidPtr, RF_AccessStripeMapHeader_t *asmh);
     96 RF_DagHeader_t *rf_MakeSimpleDAG(RF_Raid_t *raidPtr, int nNodes,
     97 				 int bytesPerSU, char *databuf,
     98 				 int (*doFunc)(RF_DagNode_t *),
     99 				 int (*undoFunc)(RF_DagNode_t *),
    100 				 char *name, RF_AllocListElem_t *alloclist,
    101 				 RF_RaidAccessFlags_t flags, int priority);
    102 
    103 #define RF_DO_CORRECT_PARITY   1
    104 #define RF_DONT_CORRECT_PARITY 0
    105 
    106 /*
    107  * Return vals for VerifyParity operation
    108  *
    109  * Ordering is important here.
    110  */
    111 #define RF_PARITY_OKAY               0 /* or no parity information */
    112 #define RF_PARITY_CORRECTED          1
    113 #define RF_PARITY_BAD                2
    114 #define RF_PARITY_COULD_NOT_CORRECT  3
    115 #define RF_PARITY_COULD_NOT_VERIFY   4
    116 
    117 #endif /* !_RF__RF_PARITYSCAN_H_ */
    118