Annotation of sys/dev/raidframe/rf_dagflags.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: rf_dagflags.h,v 1.3 2002/12/16 07:01:03 tdeval Exp $ */
2: /* $NetBSD: rf_dagflags.h,v 1.3 1999/02/05 00:06:08 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: /*****************************************************************************
32: *
33: * dagflags.h -- Flags that can be given to DoAccess.
34: * I pulled these out of dag.h because routines that call DoAccess may need
35: * these flags, but certainly do not need the declarations related to the DAG
36: * data structures.
37: *
38: *****************************************************************************/
39:
40:
41: #ifndef _RF__RF_DAGFLAGS_H_
42: #define _RF__RF_DAGFLAGS_H_
43:
44: /*
45: * Bitmasks for the "flags" parameter (RF_RaidAccessFlags_t) used
46: * by DoAccess, SelectAlgorithm, and the DAG creation routines.
47: *
48: * If USE_DAG or USE_ASM is specified, neither the DAG nor the ASM
49: * will be modified, which means that you can't SUPRESS if you
50: * specify USE_DAG.
51: */
52:
53: #define RF_DAG_FLAGS_NONE 0 /* No flags */
54: #define RF_DAG_SUPPRESS_LOCKS (1<<0) /*
55: * Supress all stripe locks in
56: * the DAG.
57: */
58: #define RF_DAG_RETURN_ASM (1<<1) /*
59: * Create an ASM and return it
60: * instead of freeing it.
61: */
62: #define RF_DAG_RETURN_DAG (1<<2) /*
63: * Create a DAG and return it
64: * instead of freeing it.
65: */
66: #define RF_DAG_NONBLOCKING_IO (1<<3) /*
67: * Cause DoAccess to be
68: * non-blocking.
69: */
70: #define RF_DAG_ACCESS_COMPLETE (1<<4) /*
71: * The access is complete.
72: */
73: #define RF_DAG_DISPATCH_RETURNED (1<<5) /*
74: * Used to handle the case
75: * where the dag invokes no
76: * I/O.
77: */
78: #define RF_DAG_TEST_ACCESS (1<<6) /*
79: * This access came through
80: * rf_ioctl instead of
81: * rf_strategy.
82: */
83:
84: #endif /* !_RF__RF_DAGFLAGS_H_ */
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