1/* $NetBSD: rf_pq.h,v 1.5 2005/12/11 12:23:37 christos Exp $ */
2/*
3 * rf_pq.h
4 */
5/*
6 * Copyright (c) 1995 Carnegie-Mellon University.
7 * All rights reserved.
8 *
9 * Author: Daniel Stodolsky
10 *
11 * Permission to use, copy, modify and distribute this software and
12 * its documentation is hereby granted, provided that both the copyright
13 * notice and this permission notice appear in all copies of the
14 * software, derivative works or modified versions, and any portions
15 * thereof, and that both notices appear in supporting documentation.
16 *
17 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
18 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
19 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
20 *
21 * Carnegie Mellon requests users of this software to return to
22 *
23 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
24 * School of Computer Science
25 * Carnegie Mellon University
26 * Pittsburgh PA 15213-3890
27 *
28 * any improvements or extensions that they make and grant Carnegie the
29 * rights to redistribute these changes.
30 */
31
32#ifndef _RF__RF_PQ_H_
33#define _RF__RF_PQ_H_
34
35#include "rf_archs.h"
36
37extern RF_RedFuncs_t rf_pFuncs;
38extern RF_RedFuncs_t rf_pRecoveryFuncs;
39
40int rf_RegularONPFunc(RF_DagNode_t * node);
41int rf_SimpleONPFunc(RF_DagNode_t * node);
42int rf_RecoveryPFunc(RF_DagNode_t * node);
43int rf_RegularPFunc(RF_DagNode_t * node);
44
45#if (RF_INCLUDE_DECL_PQ > 0) || (RF_INCLUDE_RAID6 > 0)
46
47extern RF_RedFuncs_t rf_qFuncs;
48extern RF_RedFuncs_t rf_qRecoveryFuncs;
49extern RF_RedFuncs_t rf_pqRecoveryFuncs;
50
51void
52rf_PQDagSelect(RF_Raid_t * raidPtr, RF_IoType_t type,
53 RF_AccessStripeMap_t * asmap, RF_VoidFuncPtr * createFunc);
54RF_CREATE_DAG_FUNC_DECL(rf_PQCreateLargeWriteDAG);
55int rf_RegularONQFunc(RF_DagNode_t * node);
56int rf_SimpleONQFunc(RF_DagNode_t * node);
57RF_CREATE_DAG_FUNC_DECL(rf_PQCreateSmallWriteDAG);
58int rf_RegularPQFunc(RF_DagNode_t * node);
59int rf_RegularQFunc(RF_DagNode_t * node);
60void rf_Degraded_100_PQFunc(RF_DagNode_t * node);
61int rf_RecoveryQFunc(RF_DagNode_t * node);
62int rf_RecoveryPQFunc(RF_DagNode_t * node);
63void rf_PQ_DegradedWriteQFunc(RF_DagNode_t * node);
64void
65rf_IncQ(unsigned long *dest, unsigned long *buf, unsigned length,
66 unsigned coeff);
67void
68rf_PQ_recover(unsigned long *pbuf, unsigned long *qbuf, unsigned long *abuf,
69 unsigned long *bbuf, unsigned length, unsigned coeff_a, unsigned coeff_b);
70
71#endif /* (RF_INCLUDE_DECL_PQ > 0) ||
72 * (RF_INCLUDE_RAID6 > 0) */
73
74#endif /* !_RF__RF_PQ_H_ */
75