fsck_hfs/dfalib/SDevice.c

   1 /*
   2  * Copyright (c) 1999-2000, 2002, 2005, 2007-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 #include "SRuntime.h"
  24 #include "../fsck_hfs.h"
  25
  26 #if BSD
  27
  28 #include <unistd.h>
  29 #include <errno.h>
  30 #include <sys/ioctl.h>
  31
  32 #include <IOKit/storage/IOMediaBSDClient.h>
  33
  34 #else
  35
  36 #include <Files.h>
  37 #include <Device.h>
  38 #include <Disks.h>
  39
  40 #endif
  41
  42
  43 OSErr GetDeviceSize(int driveRefNum, UInt64 *numBlocks, UInt32 *blockSize)
  44 {
  45 #if BSD
  46         UInt64 devBlockCount = 0;
  47         int devBlockSize = 0;
  48
  49         if (ioctl(driveRefNum, DKIOCGETBLOCKCOUNT, &devBlockCount) < 0) {
  50                 if (debug) plog("ioctl(DKIOCGETBLOCKCOUNT) for fd %d: %s\n", driveRefNum, strerror(errno));
  51                 return (-1);
  52         }
  53
  54         if (ioctl(driveRefNum, DKIOCGETBLOCKSIZE, &devBlockSize) < 0) {
  55                 if (debug) plog("ioctl(DKIOCGETBLOCKSIZE) for fd %d: %s\n", driveRefNum, strerror(errno));
  56                 return (-1);
  57         }
  58
  59         if (devBlockSize != 512) {
  60                 *numBlocks = (devBlockCount * (UInt64)devBlockSize) / 512;
  61                 *blockSize = 512;
  62         } else {
  63                 *numBlocks = devBlockCount;
  64                 *blockSize = devBlockSize;
  65         }
  66         return (0);
  67 #else
  68         /* Various Mac OS device constants */
  69         enum
  70         {
  71                 /* return format list status code */
  72                 kFmtLstCode = 6,
  73
  74                 /* reference number of .SONY driver */
  75                 kSonyRefNum = 0xfffb,
  76
  77                 /* values returned by DriveStatus in DrvSts.twoSideFmt */
  78                 kSingleSided = 0,
  79                 kDoubleSided = -1,
  80                 kSingleSidedSize = 800,         /* 400K */
  81                 kDoubleSidedSize = 1600,        /* 800K */
  82
  83                 /* values in DrvQEl.qType */
  84                 kWordDrvSiz = 0,
  85                 kLongDrvSiz = 1,
  86
  87                 /* more than enough formatListRecords */
  88                 kMaxFormatListRecs = 16
  89         };
  90
  91         ParamBlockRec   pb;
  92         FormatListRec   formatListRecords[kMaxFormatListRecs];
  93         DrvSts                  status;
  94         short                   formatListRecIndex;
  95         OSErr                   result;
  96         unsigned long   blocks                  = 0;
  97
  98
  99         /* Attempt to get the drive's format list. */
 100         /* (see the Technical Note "What Your Sony Drives For You") */
 101
 102         pb.cntrlParam.ioVRefNum = driveQElementPtr->dQDrive;
 103         pb.cntrlParam.ioCRefNum = driveQElementPtr->dQRefNum;
 104         pb.cntrlParam.csCode = kFmtLstCode;
 105         pb.cntrlParam.csParam[0] = kMaxFormatListRecs;
 106         *(long *)&pb.cntrlParam.csParam[1] = (long)&formatListRecords[0];
 107
 108         result = PBStatusSync(&pb);
 109
 110         if ( result == noErr )
 111         {
 112                 /* The drive supports ReturnFormatList status call. */
 113
 114                 /* Get the current disk's size. */
 115                 for( formatListRecIndex = 0;
 116                          formatListRecIndex < pb.cntrlParam.csParam[0];
 117                          ++formatListRecIndex )
 118                 {
 119                         if ( (formatListRecords[formatListRecIndex].formatFlags &
 120                                   diCIFmtFlagsCurrentMask) != 0 )
 121                         {
 122                                 blocks = formatListRecords[formatListRecIndex].volSize;
 123                         }
 124                 }
 125                 if ( blocks == 0 )
 126                 {
 127                         /* This should never happen */
 128                         result = paramErr;
 129                 }
 130         }
 131         else if ( driveQElementPtr->dQRefNum == (short)kSonyRefNum )
 132         {
 133                 /* The drive is a non-SuperDrive floppy which only supports 400K and 800K disks */
 134
 135                 result = DriveStatus(driveQElementPtr->dQDrive, &status);
 136                 if ( result == noErr )
 137                 {
 138                         switch ( status.twoSideFmt )
 139                         {
 140                                 case kSingleSided:
 141                                         blocks = kSingleSidedSize;
 142                                         break;
 143
 144                                 case kDoubleSided:
 145                                         blocks = kDoubleSidedSize;
 146                                         break;
 147
 148                                 default:                //      This should never happen
 149                                         result = paramErr;
 150                                         break;
 151                         }
 152                 }
 153         }
 154         else
 155         {
 156                 /* The drive is not a floppy and it doesn't support ReturnFormatList */
 157                 /* so use the dQDrvSz field(s) */
 158
 159                 result = noErr; /* reset result */
 160
 161                 switch ( driveQElementPtr->qType )
 162                 {
 163                         case kWordDrvSiz:
 164                                 blocks = driveQElementPtr->dQDrvSz;
 165                                 break;
 166
 167                         case kLongDrvSiz:
 168                                 blocks = ((unsigned long)driveQElementPtr->dQDrvSz2 << 16) +
 169                                                  driveQElementPtr->dQDrvSz;
 170                                 break;
 171
 172                         default:                //      This should never happen
 173                                 result = paramErr;
 174                                 break;
 175                 }
 176         }
 177
 178         *numBlocks = blocks;
 179         *blockSize = 512;
 180
 181         return( result );
 182 #endif
 183 }
 184
 185
 186 OSErr DeviceRead(int device, int drive, void* buffer, SInt64 offset, UInt32 reqBytes, UInt32 *actBytes)
 187 {
 188 #if BSD
 189         off_t seek_off;
 190         ssize_t nbytes;
 191
 192         *actBytes = 0;
 193
 194         seek_off = lseek(device, offset, SEEK_SET);
 195         if (seek_off == -1) {
 196                 if (debug) plog("# DeviceRead: lseek(%qd) failed with %d\n", offset, errno);
 197                 return (errno);
 198         }
 199
 200         nbytes = read(device, buffer, reqBytes);
 201         if (nbytes == -1)
 202                 return (errno);
 203         if (nbytes == 0) {
 204                 if (debug) plog("CANNOT READ: BLK %ld\n", (long)offset/512);
 205                 return (5);
 206         }
 207
 208         *actBytes = (UInt32)nbytes;
 209         return (0);
 210
 211 #else
 212         OSErr err;
 213         XIOParam pb;
 214
 215         pb.ioVRefNum    = drive;
 216         pb.ioRefNum     = device;
 217         pb.ioPosMode    = fsFromStart;
 218         pb.ioReqCount   = reqBytes;
 219         pb.ioBuffer     = buffer;
 220
 221         if ( (offset & 0xFFFFFFFF00000000) != 0 )
 222         {
 223                 *(SInt64*)&pb.ioWPosOffset = offset;
 224                 pb.ioPosMode |= (1 << kWidePosOffsetBit);
 225         }
 226         else
 227         {
 228                 ((IOParam*)&pb)->ioPosOffset = offset;
 229         }
 230
 231         err = PBReadSync( (ParamBlockRec *)&pb );
 232
 233         return (err);
 234 #endif
 235 }
 236
 237
 238 OSErr DeviceWrite(int device, int drive, void* buffer, SInt64 offset, UInt32 reqBytes, UInt32 *actBytes)
 239 {
 240 #if BSD
 241         off_t seek_off;
 242         ssize_t nbytes;
 243
 244         *actBytes = 0;
 245
 246         seek_off = lseek(device, offset, SEEK_SET);
 247         if (seek_off == -1) {
 248                 if (debug) plog("# DeviceRead: lseek(%qd) failed with %d\n", offset, errno);
 249                 return (errno);
 250         }
 251
 252         nbytes = write(device, buffer, reqBytes);
 253         if (nbytes == -1) {
 254                 return (errno);
 255         }
 256         if (nbytes == 0) {
 257                 if (debug) plog("CANNOT WRITE: BLK %ld\n", (long)offset/512);
 258                 return (5);
 259         }
 260
 261         *actBytes = (UInt32)nbytes;
 262         return (0);
 263 #else
 264         OSErr err;
 265         XIOParam pb;
 266
 267         pb.ioVRefNum    = drive;
 268         pb.ioRefNum     = device;
 269         pb.ioPosMode    = fsFromStart;
 270         pb.ioReqCount   = reqBytes;
 271         pb.ioBuffer     = buffer;
 272
 273         if ( (offset & 0xFFFFFFFF00000000) != 0 )
 274         {
 275                 *(SInt64*)&pb.ioWPosOffset = offset;
 276                 pb.ioPosMode |= (1 << kWidePosOffsetBit);
 277         }
 278         else
 279         {
 280                 ((IOParam*)&pb)->ioPosOffset = offset;
 281         }
 282
 283         err = PBWriteSync( (ParamBlockRec *)&pb );
 284
 285         return (err);
 286 #endif
 287 }