38a3987b69
Carnegie Mellon University. Full RAID implementation, including levels 0, 1, 4, 5, 6, parity logging, and a few other goodies. Ported to NetBSD by Greg Oster.
118 lines
4.0 KiB
C
118 lines
4.0 KiB
C
/* $NetBSD: rf_parityscan.h,v 1.1 1998/11/13 04:20:32 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/* :
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* Log: rf_parityscan.h,v
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* Revision 1.14 1996/07/05 18:01:12 jimz
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* don't make parity protos ndef KERNEL
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*
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* Revision 1.13 1996/06/20 17:41:43 jimz
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* change decl for VerifyParity
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*
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* Revision 1.12 1996/06/20 15:38:39 jimz
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* renumber parityscan return codes
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*
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* Revision 1.11 1996/06/19 22:23:01 jimz
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* parity verification is now a layout-configurable thing
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* not all layouts currently support it (correctly, anyway)
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*
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* Revision 1.10 1996/06/09 02:36:46 jimz
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* lots of little crufty cleanup- fixup whitespace
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* issues, comment #ifdefs, improve typing in some
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* places (esp size-related)
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*
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* Revision 1.9 1996/06/07 21:33:04 jimz
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* begin using consistent types for sector numbers,
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* stripe numbers, row+col numbers, recon unit numbers
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*
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* Revision 1.8 1996/06/02 17:31:48 jimz
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* Moved a lot of global stuff into array structure, where it belongs.
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* Fixed up paritylogging, pss modules in this manner. Some general
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* code cleanup. Removed lots of dead code, some dead files.
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*
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* Revision 1.7 1996/05/31 22:26:54 jimz
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* fix a lot of mapping problems, memory allocation problems
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* found some weird lock issues, fixed 'em
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* more code cleanup
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*
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* Revision 1.6 1996/05/24 22:17:04 jimz
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* continue code + namespace cleanup
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* typed a bunch of flags
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*
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* Revision 1.5 1996/05/24 04:28:55 jimz
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* release cleanup ckpt
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*
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* Revision 1.4 1996/05/23 21:46:35 jimz
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* checkpoint in code cleanup (release prep)
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* lots of types, function names have been fixed
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*
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* Revision 1.3 1996/05/18 19:51:34 jimz
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* major code cleanup- fix syntax, make some types consistent,
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* add prototypes, clean out dead code, et cetera
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*
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* Revision 1.2 1995/11/30 16:20:46 wvcii
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* added copyright info
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*
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*/
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#ifndef _RF__RF_PARITYSCAN_H_
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#define _RF__RF_PARITYSCAN_H_
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#include "rf_types.h"
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#include "rf_alloclist.h"
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int rf_RewriteParity(RF_Raid_t *raidPtr);
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int rf_VerifyParityBasic(RF_Raid_t *raidPtr, RF_RaidAddr_t raidAddr,
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RF_PhysDiskAddr_t *parityPDA, int correct_it, RF_RaidAccessFlags_t flags);
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int rf_VerifyParity(RF_Raid_t *raidPtr, RF_AccessStripeMap_t *stripeMap,
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int correct_it, RF_RaidAccessFlags_t flags);
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int rf_TryToRedirectPDA(RF_Raid_t *raidPtr, RF_PhysDiskAddr_t *pda, int parity);
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int rf_VerifyDegrModeWrite(RF_Raid_t *raidPtr, RF_AccessStripeMapHeader_t *asmh);
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RF_DagHeader_t *rf_MakeSimpleDAG(RF_Raid_t *raidPtr, int nNodes,
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int bytesPerSU, char *databuf,
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int (*doFunc)(RF_DagNode_t *),
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int (*undoFunc)(RF_DagNode_t *),
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char *name, RF_AllocListElem_t *alloclist,
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RF_RaidAccessFlags_t flags, int priority);
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#define RF_DO_CORRECT_PARITY 1
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#define RF_DONT_CORRECT_PARITY 0
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/*
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* Return vals for VerifyParity operation
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*
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* Ordering is important here.
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*/
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#define RF_PARITY_OKAY 0 /* or no parity information */
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#define RF_PARITY_CORRECTED 1
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#define RF_PARITY_BAD 2
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#define RF_PARITY_COULD_NOT_CORRECT 3
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#define RF_PARITY_COULD_NOT_VERIFY 4
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#endif /* !_RF__RF_PARITYSCAN_H_ */
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