1999-01-26 05:33:49 +03:00
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/* $NetBSD: rf_dagflags.h,v 1.2 1999/01/26 02:33:53 oster Exp $ */
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1998-11-13 07:20:26 +03:00
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/**************************************************************************************
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*
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* dagflags.h -- flags that can be given to DoAccess
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* I pulled these out of dag.h because routines that call DoAccess may need these flags,
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* but certainly do not need the declarations related to the DAG data structures.
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*
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**************************************************************************************/
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#ifndef _RF__RF_DAGFLAGS_H_
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#define _RF__RF_DAGFLAGS_H_
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/*
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* Bitmasks for the "flags" parameter (RF_RaidAccessFlags_t) used
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* by DoAccess, SelectAlgorithm, and the DAG creation routines.
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*
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* If USE_DAG or USE_ASM is specified, neither the DAG nor the ASM
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* will be modified, which means that you can't SUPRESS if you
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* specify USE_DAG.
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*/
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#define RF_DAG_FLAGS_NONE 0 /* no flags */
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#define RF_DAG_SUPPRESS_LOCKS (1<<0) /* supress all stripe locks in the DAG */
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#define RF_DAG_RETURN_ASM (1<<1) /* create an ASM and return it instead of freeing it */
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#define RF_DAG_RETURN_DAG (1<<2) /* create a DAG and return it instead of freeing it */
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#define RF_DAG_NONBLOCKING_IO (1<<3) /* cause DoAccess to be non-blocking */
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#define RF_DAG_ACCESS_COMPLETE (1<<4) /* the access is complete */
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#define RF_DAG_DISPATCH_RETURNED (1<<5) /* used to handle the case where the dag invokes no I/O */
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#define RF_DAG_TEST_ACCESS (1<<6) /* this access came through rf_ioctl instead of rf_strategy */
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#endif /* !_RF__RF_DAGFLAGS_H_ */
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