Annotation of sys/dev/raidframe/rf_dagflags.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: rf_dagflags.h,v 1.3 2002/12/16 07:01:03 tdeval Exp $ */
! 2: /* $NetBSD: rf_dagflags.h,v 1.3 1999/02/05 00:06:08 oster Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Carnegie-Mellon University.
! 6: * All rights reserved.
! 7: *
! 8: * Author: Mark Holland
! 9: *
! 10: * Permission to use, copy, modify and distribute this software and
! 11: * its documentation is hereby granted, provided that both the copyright
! 12: * notice and this permission notice appear in all copies of the
! 13: * software, derivative works or modified versions, and any portions
! 14: * thereof, and that both notices appear in supporting documentation.
! 15: *
! 16: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
! 17: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
! 18: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
! 19: *
! 20: * Carnegie Mellon requests users of this software to return to
! 21: *
! 22: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
! 23: * School of Computer Science
! 24: * Carnegie Mellon University
! 25: * Pittsburgh PA 15213-3890
! 26: *
! 27: * any improvements or extensions that they make and grant Carnegie the
! 28: * rights to redistribute these changes.
! 29: */
! 30:
! 31: /*****************************************************************************
! 32: *
! 33: * dagflags.h -- Flags that can be given to DoAccess.
! 34: * I pulled these out of dag.h because routines that call DoAccess may need
! 35: * these flags, but certainly do not need the declarations related to the DAG
! 36: * data structures.
! 37: *
! 38: *****************************************************************************/
! 39:
! 40:
! 41: #ifndef _RF__RF_DAGFLAGS_H_
! 42: #define _RF__RF_DAGFLAGS_H_
! 43:
! 44: /*
! 45: * Bitmasks for the "flags" parameter (RF_RaidAccessFlags_t) used
! 46: * by DoAccess, SelectAlgorithm, and the DAG creation routines.
! 47: *
! 48: * If USE_DAG or USE_ASM is specified, neither the DAG nor the ASM
! 49: * will be modified, which means that you can't SUPRESS if you
! 50: * specify USE_DAG.
! 51: */
! 52:
! 53: #define RF_DAG_FLAGS_NONE 0 /* No flags */
! 54: #define RF_DAG_SUPPRESS_LOCKS (1<<0) /*
! 55: * Supress all stripe locks in
! 56: * the DAG.
! 57: */
! 58: #define RF_DAG_RETURN_ASM (1<<1) /*
! 59: * Create an ASM and return it
! 60: * instead of freeing it.
! 61: */
! 62: #define RF_DAG_RETURN_DAG (1<<2) /*
! 63: * Create a DAG and return it
! 64: * instead of freeing it.
! 65: */
! 66: #define RF_DAG_NONBLOCKING_IO (1<<3) /*
! 67: * Cause DoAccess to be
! 68: * non-blocking.
! 69: */
! 70: #define RF_DAG_ACCESS_COMPLETE (1<<4) /*
! 71: * The access is complete.
! 72: */
! 73: #define RF_DAG_DISPATCH_RETURNED (1<<5) /*
! 74: * Used to handle the case
! 75: * where the dag invokes no
! 76: * I/O.
! 77: */
! 78: #define RF_DAG_TEST_ACCESS (1<<6) /*
! 79: * This access came through
! 80: * rf_ioctl instead of
! 81: * rf_strategy.
! 82: */
! 83:
! 84: #endif /* !_RF__RF_DAGFLAGS_H_ */
CVSweb