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_ */