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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_ */