Home | History | Annotate | Line # | Download | only in raidframe
rf_dagflags.h revision 1.3 
      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 (at) 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