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 | |