Annotation of sys/dev/raidframe/rf_evenodd_dagfuncs.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: rf_evenodd_dagfuncs.h,v 1.3 2002/12/16 07:01:04 tdeval Exp $ */
2: /* $NetBSD: rf_evenodd_dagfuncs.h,v 1.2 1999/02/05 00:06:11 oster Exp $ */
3:
4: /*
5: * rf_evenodd_dagfuncs.h
6: */
7: /*
8: * Copyright (c) 1996 Carnegie-Mellon University.
9: * All rights reserved.
10: *
11: * Author: Chang-Ming Wu
12: *
13: * Permission to use, copy, modify and distribute this software and
14: * its documentation is hereby granted, provided that both the copyright
15: * notice and this permission notice appear in all copies of the
16: * software, derivative works or modified versions, and any portions
17: * thereof, and that both notices appear in supporting documentation.
18: *
19: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
20: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
21: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
22: *
23: * Carnegie Mellon requests users of this software to return to
24: *
25: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
26: * School of Computer Science
27: * Carnegie Mellon University
28: * Pittsburgh PA 15213-3890
29: *
30: * any improvements or extensions that they make and grant Carnegie the
31: * rights to redistribute these changes.
32: */
33:
34: #ifndef _RF__RF_EVENODD_DAGFUNCS_H_
35: #define _RF__RF_EVENODD_DAGFUNCS_H_
36:
37: extern RF_RedFuncs_t rf_EOSmallWriteEFuncs;
38: extern RF_RedFuncs_t rf_EOSmallWritePFuncs;
39: extern RF_RedFuncs_t rf_eoERecoveryFuncs;
40: extern RF_RedFuncs_t rf_eoPRecoveryFuncs;
41: extern RF_RedFuncs_t rf_eoERecoveryFuncs;
42:
43: int rf_RegularPEFunc(RF_DagNode_t *);
44: int rf_RegularONEFunc(RF_DagNode_t *);
45: int rf_SimpleONEFunc(RF_DagNode_t *);
46: void rf_RegularESubroutine(RF_DagNode_t *, char *);
47: int rf_RegularEFunc(RF_DagNode_t *);
48: void rf_DegrESubroutine(RF_DagNode_t *, char *);
49: int rf_Degraded_100_EOFunc(RF_DagNode_t *);
50: void rf_e_EncOneSect(RF_RowCol_t, char *, RF_RowCol_t, char *, int);
51: void rf_e_encToBuf(RF_Raid_t *, RF_RowCol_t, char *, RF_RowCol_t, char *, int);
52: int rf_RecoveryEFunc(RF_DagNode_t *);
53: int rf_EO_DegradedWriteEFunc(RF_DagNode_t *);
54: void rf_doubleEOdecode(RF_Raid_t *, char **, char **, RF_RowCol_t *,
55: char *, char *);
56: int rf_EvenOddDoubleRecoveryFunc(RF_DagNode_t *);
57: int rf_EOWriteDoubleRecoveryFunc(RF_DagNode_t *);
58:
59: #define rf_EUCol(_layoutPtr_,_addr_) \
60: ((_addr_) % ((_layoutPtr_)->dataSectorsPerStripe)) / \
61: ((_layoutPtr_)->sectorsPerStripeUnit)
62:
63: #define rf_EO_Mod(_int1_,_int2_) \
64: (((_int1_) < 0) ? (((_int1_) + (_int2_)) % (_int2_)) \
65: : ((_int1_) % (_int2_)))
66:
67: #define rf_OffsetOfNextEUBoundary(_offset_, sec_per_eu) \
68: ((_offset_) / (sec_per_eu) + 1) * (sec_per_eu)
69:
70: #define RF_EO_MATRIX_DIM 17
71:
72: /*
73: * RF_EO_MATRIX_DIM should be a prime number: and "bytesPerSector" should be
74: * divisible by (RF_EO_MATRIX_DIM - 1) to fully encode and utilize the space
75: * in a sector, this number could also be 17. That later case doesn't apply
76: * for disk array larger than 17 columns totally.
77: */
78:
79: #endif /* !_RF__RF_EVENODD_DAGFUNCS_H_ */
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