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Annotation of driverkit/libDriver/Kernel/kernelDiskMethods.m, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: /*     Copyright (c) 1991 NeXT Computer, Inc.  All rights reserved. 
        !            25:  *
        !            26:  * kernelDiskMethods.m - Kernel devsw glue for DiskObject class.
        !            27:  *
        !            28:  * HISTORY
        !            29:  * 02-May-91    Doug Mitchell at NeXT
        !            30:  *      Created. 
        !            31:  */
        !            32: 
        !            33: /*
        !            34:  * HACK ALERT
        !            35:  * avoid including the code in signal.h to avoid the multiple definition of
        !            36:  * __quad_word.
        !            37:  */
        !            38: #define _MACHINE_SIGNAL_ 1
        !            39: 
        !            40: #import <driverkit/return.h>
        !            41: #import <driverkit/IODisk.h>
        !            42: #import <driverkit/kernelDiskMethods.h>
        !            43: #import <bsd/sys/buf.h>
        !            44: #import <bsd/sys/errno.h>
        !            45: #import <kern/assert.h>
        !            46: #import <kernserv/prototypes.h>
        !            47: #import <driverkit/generalFuncs.h>
        !            48: 
        !            49: 
        !            50: #ifdef ppc //bknight - 12/3/97 - Radar #2004660
        !            51: #define GROK_APPLE 1
        !            52: #endif //bknight - 12/3/97 - Radar #2004660
        !            53: 
        !            54: 
        !            55: @implementation IODisk(kernelDiskMethods)
        !            56: 
        !            57: /*
        !            58:  * Async I/O complete function. Supercedes ioComplete method in 
        !            59:  * libDriver/User/IODeviceDispatch.m. The void * argument is actually 
        !            60:  * a struct buf *, but the rest of the code in DiskObject doesn't 
        !            61:  * need to know that.
        !            62:  */
        !            63: - (void)completeTransfer               : (void *)iobuf 
        !            64:                             withStatus : (IOReturn)status
        !            65:                           actualLength : (unsigned)actualLength
        !            66: {
        !            67:        struct buf *bp = iobuf;
        !            68:        
        !            69:        if(status != IO_R_SUCCESS) {
        !            70:                bp->b_flags |= B_ERROR;
        !            71:        }
        !            72:        bp->b_error = [self errnoFromReturn:status];
        !            73:        bp->b_resid = bp->b_bcount - actualLength;
        !            74:        biodone(bp);
        !            75: }
        !            76: 
        !            77: 
        !            78: /*
        !            79:  * Get/set idMap pointer.
        !            80:  */
        !            81: - (IODevAndIdInfo *)devAndIdInfo
        !            82: {
        !            83:        return(_devAndIdInfo);
        !            84: }
        !            85: 
        !            86: - (void)setDevAndIdInfo : (IODevAndIdInfo *)devAndIdInfo
        !            87: {
        !            88:        _devAndIdInfo = devAndIdInfo;
        !            89: }
        !            90: 
        !            91: /*
        !            92:  * Obtain dev_t associated with this instance. This does not take into 
        !            93:  * account partitions, since they are a IODiskPartition construct.
        !            94:  */
        !            95: - (dev_t)blockDev
        !            96: {
        !            97:        return _devAndIdInfo->blockDev;
        !            98: }
        !            99: 
        !           100: - (dev_t)rawDev
        !           101: {
        !           102:        return _devAndIdInfo->rawDev;
        !           103: }
        !           104: 
        !           105: @end
        !           106: 
        !           107: @implementation IODisk(kernelDiskMethodsPrivate)
        !           108: 
        !           109: /*
        !           110:  * Register either a LogicalDisk or a DiskObject subclass with the owner's
        !           111:  * IODevAndIdInfo array.
        !           112:  */
        !           113: - (void)registerUnixDisk       : (int) partition       
        !           114: {
        !           115: #ifdef GROK_APPLE //bknight - 12/3/97 - Radar #2004660
        !           116:        if( ! ( partition < ( 2 * NPART ) ) ) {
        !           117: #else GROK_APPLE //bknight - 12/3/97 - Radar #2004660
        !           118:        if(partition > (NPART-2)) {
        !           119: #endif GROK_APPLE //bknight - 12/3/97 - Radar #2004660
        !           120:                IOLog("%s registerUnixDisk: Bogus partition (%d)\n",
        !           121:                        [self name], partition);
        !           122:                return;
        !           123:        }
        !           124:        if(_isPhysical) {
        !           125:                _devAndIdInfo->liveId = self;
        !           126:        }
        !           127:        else {
        !           128:                _devAndIdInfo->partitionId[partition] = self;
        !           129:        }
        !           130: }
        !           131: 
        !           132: /*
        !           133:  * FIXME:
        !           134:  * This needs some locking to prevent IO requests to nil IDs!
        !           135:  */
        !           136: - (void)unregisterUnixDisk     :(int) partition        
        !           137: {
        !           138: #ifdef GROK_APPLE //bknight - 12/3/97 - Radar #2004660
        !           139:        if( ! ( partition < ( 2 * NPART ) ) ) {
        !           140: #else GROK_APPLE //bknight - 12/3/97 - Radar #2004660
        !           141:        if(partition > (NPART-2)) {
        !           142: #endif GROK_APPLE //bknight - 12/3/97 - Radar #2004660
        !           143:                IOLog("%s unregisterUnixDisk: Bogus partition (%d)\n",
        !           144:                        [self name], partition);
        !           145:                return;
        !           146:        }
        !           147:        if(_isPhysical) {
        !           148:                _devAndIdInfo->liveId = nil;
        !           149:        }
        !           150:        else {
        !           151:                _devAndIdInfo->partitionId[partition] = nil;
        !           152:        }
        !           153: }
        !           154: 
        !           155: @end
        !           156: 

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