1/* $NetBSD: rf_dagflags.h,v 1.5 2005/12/11 12:23:37 christos Exp $ */
2/*
3 * Copyright (c) 1995 Carnegie-Mellon University.
4 * All rights reserved.
5 *
6 * Author: Mark Holland
7 *
8 * Permission to use, copy, modify and distribute this software and
9 * its documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
27 */
28
29/**************************************************************************************
30 *
31 * dagflags.h -- flags that can be given to DoAccess
32 * I pulled these out of dag.h because routines that call DoAccess may need these flags,
33 * but certainly do not need the declarations related to the DAG data structures.
34 *
35 **************************************************************************************/
36
37
38#ifndef _RF__RF_DAGFLAGS_H_
39#define _RF__RF_DAGFLAGS_H_
40
41/*
42 * Bitmasks for the "flags" parameter (RF_RaidAccessFlags_t) used
43 * by DoAccess, SelectAlgorithm, and the DAG creation routines.
44 *
45 * If USE_DAG or USE_ASM is specified, neither the DAG nor the ASM
46 * will be modified, which means that you can't SUPRESS if you
47 * specify USE_DAG.
48 */
49
50#define RF_DAG_FLAGS_NONE 0 /* no flags */
51#define RF_DAG_SUPPRESS_LOCKS (1<<0) /* supress all stripe locks in
52 * the DAG */
53#define RF_DAG_NONBLOCKING_IO (1<<3) /* cause DoAccess to be
54 * non-blocking */
55#define RF_DAG_ACCESS_COMPLETE (1<<4) /* the access is complete */
56#define RF_DAG_DISPATCH_RETURNED (1<<5) /* used to handle the case
57 * where the dag invokes no
58 * I/O */
59
60#endif /* !_RF__RF_DAGFLAGS_H_ */
61