1 /* $OpenBSD: rf_parityscan.h,v 1.3 2002/12/16 07:01:04 tdeval Exp $ */
2 /* $NetBSD: rf_parityscan.h,v 1.3 1999/02/05 00:06:14 oster Exp $ */
3
4 /*
5 * Copyright (c) 1995 Carnegie-Mellon University.
6 * All rights reserved.
7 *
8 * Author: Mark Holland
9 *
10 * Permission to use, copy, modify and distribute this software and
11 * its documentation is hereby granted, provided that both the copyright
12 * notice and this permission notice appear in all copies of the
13 * software, derivative works or modified versions, and any portions
14 * thereof, and that both notices appear in supporting documentation.
15 *
16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
19 *
20 * Carnegie Mellon requests users of this software to return to
21 *
22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
23 * School of Computer Science
24 * Carnegie Mellon University
25 * Pittsburgh PA 15213-3890
26 *
27 * any improvements or extensions that they make and grant Carnegie the
28 * rights to redistribute these changes.
29 */
30
31 #ifndef _RF__RF_PARITYSCAN_H_
32 #define _RF__RF_PARITYSCAN_H_
33
34 #include "rf_types.h"
35 #include "rf_alloclist.h"
36
37 int rf_RewriteParity(RF_Raid_t *);
38 int rf_VerifyParityBasic(RF_Raid_t *, RF_RaidAddr_t, RF_PhysDiskAddr_t *, int,
39 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 int (*) (RF_DagNode_t *), int (*) (RF_DagNode_t *), 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_ */