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/* $OpenBSD: rf_dagflags.h,v 1.1 1999/01/11 14:29:10 niklas Exp $ */
/* $NetBSD: rf_dagflags.h,v 1.1 1998/11/13 04:20:27 oster 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 Software.Distribution@CS.CMU.EDU
* 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.
*
**************************************************************************************/
/* :
* Log: rf_dagflags.h,v
* Revision 1.10 1996/06/13 19:08:23 jimz
* remove unused BD flag
*
* Revision 1.9 1996/05/30 11:29:41 jimz
* Numerous bug fixes. Stripe lock release code disagreed with the taking code
* about when stripes should be locked (I made it consistent: no parity, no lock)
* There was a lot of extra serialization of I/Os which I've removed- a lot of
* it was to calculate values for the cache code, which is no longer with us.
* More types, function, macro cleanup. Added code to properly quiesce the array
* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
* before. Fixed memory allocation, freeing bugs.
*
* Revision 1.8 1996/05/24 22:17:04 jimz
* continue code + namespace cleanup
* typed a bunch of flags
*
* Revision 1.7 1996/05/23 21:46:35 jimz
* checkpoint in code cleanup (release prep)
* lots of types, function names have been fixed
*
* Revision 1.6 1995/12/01 15:59:40 root
* added copyright info
*
*/
#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 SUPRESS if you
* specify USE_DAG.
*/
#define RF_DAG_FLAGS_NONE 0 /* no flags */
#define RF_DAG_SUPPRESS_LOCKS (1<<0) /* supress all stripe locks in the DAG */
#define RF_DAG_RETURN_ASM (1<<1) /* create an ASM and return it instead of freeing it */
#define RF_DAG_RETURN_DAG (1<<2) /* create a DAG and return it instead of freeing it */
#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 */
#define RF_DAG_TEST_ACCESS (1<<6) /* this access came through rf_ioctl instead of rf_strategy */
#endif /* !_RF__RF_DAGFLAGS_H_ */
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