1 /* $NetBSD: rf_dagflags.h,v 1.3 1999/02/05 00:06:08 oster 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_RETURN_ASM (1<<1) /* create an ASM and return it 54 * instead of freeing it */ 55 #define RF_DAG_RETURN_DAG (1<<2) /* create a DAG and return it 56 * instead of freeing it */ 57 #define RF_DAG_NONBLOCKING_IO (1<<3) /* cause DoAccess to be 58 * non-blocking */ 59 #define RF_DAG_ACCESS_COMPLETE (1<<4) /* the access is complete */ 60 #define RF_DAG_DISPATCH_RETURNED (1<<5) /* used to handle the case 61 * where the dag invokes no 62 * I/O */ 63 #define RF_DAG_TEST_ACCESS (1<<6) /* this access came through 64 * rf_ioctl instead of 65 * rf_strategy */ 66 67 #endif /* !_RF__RF_DAGFLAGS_H_ */ 68