/*      $NetBSD: rf_dagflags.h,v 1.6 2019/07/11 03:49:51 msaitoh Exp $  */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
*  Software Distribution Coordinator  or  [email protected]
*  School of Computer Science
*  Carnegie Mellon University
*  Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/

/**************************************************************************************
*
* dagflags.h -- flags that can be given to DoAccess
* I pulled these out of dag.h because routines that call DoAccess may need these flags,
* but certainly do not need the declarations related to the DAG data structures.
*
**************************************************************************************/


#ifndef _RF__RF_DAGFLAGS_H_
#define _RF__RF_DAGFLAGS_H_

/*
* Bitmasks for the "flags" parameter (RF_RaidAccessFlags_t) used
* by DoAccess, SelectAlgorithm, and the DAG creation routines.
*
* If USE_DAG or USE_ASM is specified, neither the DAG nor the ASM
* will be modified, which means that you can't SUPPRESS if you
* specify USE_DAG.
*/

#define RF_DAG_FLAGS_NONE             0 /* no flags */
#define RF_DAG_SUPPRESS_LOCKS     (1<<0)        /* suppress all stripe locks in
                                                * the DAG */
#define RF_DAG_NONBLOCKING_IO     (1<<3)        /* cause DoAccess to be
                                                * non-blocking */
#define RF_DAG_ACCESS_COMPLETE    (1<<4)        /* the access is complete */
#define RF_DAG_DISPATCH_RETURNED  (1<<5)        /* used to handle the case
                                                * where the dag invokes no
                                                * I/O */

#endif                          /* !_RF__RF_DAGFLAGS_H_ */

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