src/WINNT/afsrdr/kernel/lib/AFSFSControl.cpp

   1 /*
   2  * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Kernel Drivers, LLC.
   3  * Copyright (c) 2009, 2010, 2011, 2012, 2013 Your File System, Inc.
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * - Redistributions of source code must retain the above copyright notice,
  11  *   this list of conditions and the following disclaimer.
  12  * - Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in the
  14  *   documentation and/or other materials provided with the distribution.
  15  * - Neither the names of Kernel Drivers, LLC and Your File System, Inc.
  16  *   nor the names of their contributors may be used to endorse or promote
  17  *   products derived from this software without specific prior written
  18  *   permission from Kernel Drivers, LLC and Your File System, Inc.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  23  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  24  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 //
  34 // File: AFSFSControl.cpp
  35 //
  36
  37 #include "AFSCommon.h"
  38
  39 NTSTATUS
  40 AFSFSControl( IN PDEVICE_OBJECT LibDeviceObject,
  41               IN PIRP Irp)
  42 {
  43
  44     UNREFERENCED_PARAMETER(LibDeviceObject);
  45     NTSTATUS ntStatus = STATUS_SUCCESS;
  46     IO_STACK_LOCATION *pIrpSp;
  47
  48     pIrpSp = IoGetCurrentIrpStackLocation( Irp);
  49
  50     __try
  51     {
  52
  53         switch( pIrpSp->MinorFunction)
  54         {
  55
  56             case IRP_MN_USER_FS_REQUEST:
  57
  58                 ntStatus = AFSProcessUserFsRequest( Irp);
  59
  60                 break;
  61
  62             case IRP_MN_MOUNT_VOLUME:
  63
  64                 break;
  65
  66             case IRP_MN_VERIFY_VOLUME:
  67
  68                 break;
  69
  70             default:
  71
  72                 break;
  73         }
  74
  75         AFSCompleteRequest( Irp,
  76                               ntStatus);
  77
  78     }
  79     __except( AFSExceptionFilter( __FUNCTION__, GetExceptionCode(), GetExceptionInformation()) )
  80     {
  81
  82         AFSDbgTrace(( 0,
  83                       0,
  84                       "EXCEPTION - AFSFSControl\n"));
  85
  86         AFSDumpTraceFilesFnc();
  87     }
  88
  89     return ntStatus;
  90 }
  91
  92 static BOOLEAN
  93 AFSParseMountPointTarget( IN  UNICODE_STRING *Target,
  94                           OUT USHORT         *Type,
  95                           OUT UNICODE_STRING *Volume,
  96                           OUT UNICODE_STRING *Cell)
  97 {
  98     // Targets are of the form <type>[<cell>:]<volume>
  99
 100     *Type = Target->Buffer[ 0];
 101
 102     // Extract the cell name (if any)
 103
 104     Cell->Buffer = &Target->Buffer[ 1];
 105
 106     // Search for colon separator or end of counted string
 107
 108     for ( Cell->Length = 0; Cell->Length < Target->Length - sizeof( WCHAR); Cell->Length += sizeof( WCHAR))
 109     {
 110
 111         if ( Cell->Buffer[ Cell->Length / sizeof( WCHAR)] == L':')
 112         {
 113             break;
 114         }
 115     }
 116
 117     // If a colon is not found, it means there is no cell
 118
 119     if ( Cell->Length < Target->Length - sizeof( WCHAR) &&
 120          Cell->Buffer[ Cell->Length / sizeof( WCHAR)] == L':')
 121     {
 122
 123         Cell->MaximumLength = Cell->Length;
 124
 125         if ( Cell->Length > Target->Length - 2 * sizeof( WCHAR))
 126         {
 127             // Invalid target string if there is no room for
 128             // the volume name.
 129
 130             return FALSE;
 131         }
 132
 133         Volume->Length = Volume->MaximumLength = (Target->Length - Cell->Length - 2 * sizeof( WCHAR));
 134
 135         Volume->Buffer = &Target->Buffer[ Cell->Length / sizeof( WCHAR) + 2];
 136     }
 137     else
 138     {
 139         // There is no cell
 140
 141         Volume->Length = Volume->MaximumLength = Cell->Length;
 142
 143         Volume->Buffer = Cell->Buffer;
 144
 145         Cell->Length = Cell->MaximumLength = 0;
 146
 147         Cell->Buffer = NULL;
 148     }
 149
 150     return TRUE;
 151 }
 152
 153 NTSTATUS
 154 AFSProcessUserFsRequest( IN PIRP Irp)
 155 {
 156
 157     NTSTATUS ntStatus = STATUS_SUCCESS;
 158     ULONG ulFsControlCode;
 159     AFSFcb *pFcb = NULL;
 160     PIO_STACK_LOCATION pIrpSp = IoGetCurrentIrpStackLocation( Irp );
 161     AFSCcb *pCcb = NULL;
 162     ULONG ulOutputBufferLen, ulInputBufferLen;
 163
 164     __Enter
 165     {
 166
 167         ulFsControlCode = pIrpSp->Parameters.FileSystemControl.FsControlCode;
 168
 169         pFcb = (AFSFcb *)pIrpSp->FileObject->FsContext;
 170
 171         pCcb = (AFSCcb *)pIrpSp->FileObject->FsContext2;
 172
 173         if( pFcb == NULL ||
 174             pCcb == NULL ||
 175             pCcb->DirectoryCB == NULL)
 176         {
 177
 178             AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 179                           AFS_TRACE_LEVEL_VERBOSE_2,
 180                           "AFSProcessUserFsRequest Invalid Fcb\n"));
 181
 182             try_return( ntStatus = STATUS_INVALID_DEVICE_REQUEST);
 183         }
 184
 185         if( pFcb->Header.NodeTypeCode == AFS_SPECIAL_SHARE_FCB)
 186         {
 187
 188             ntStatus = AFSProcessShareFsCtrl( Irp,
 189                                               pFcb,
 190                                               pCcb);
 191
 192             try_return( ntStatus);
 193         }
 194
 195         ulOutputBufferLen = pIrpSp->Parameters.FileSystemControl.OutputBufferLength;
 196         ulInputBufferLen = pIrpSp->Parameters.FileSystemControl.InputBufferLength;
 197
 198         //
 199         // Process the request
 200         //
 201
 202         switch( ulFsControlCode )
 203         {
 204
 205             case FSCTL_REQUEST_OPLOCK_LEVEL_1:
 206             case FSCTL_REQUEST_OPLOCK_LEVEL_2:
 207             case FSCTL_REQUEST_BATCH_OPLOCK:
 208             case FSCTL_OPLOCK_BREAK_ACKNOWLEDGE:
 209             case FSCTL_OPBATCH_ACK_CLOSE_PENDING:
 210             case FSCTL_OPLOCK_BREAK_NOTIFY:
 211             case FSCTL_OPLOCK_BREAK_ACK_NO_2:
 212             case FSCTL_REQUEST_FILTER_OPLOCK :
 213             {
 214                 //
 215                 // Note that implementing this call will probably need us
 216                 // to call the server as well as adding code in read and
 217                 // write and caching.  Also that it is unlikely that
 218                 // anyone will ever call us at this point - RDR doesn't
 219                 // allow it
 220                 //
 221
 222                 ntStatus = STATUS_NOT_IMPLEMENTED;
 223
 224                 break;
 225             }
 226
 227             case FSCTL_LOCK_VOLUME:
 228             {
 229                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 230                               AFS_TRACE_LEVEL_VERBOSE_2,
 231                               "AFSProcessUserFsRequest Processing FSCTL_LOCK_VOLUME request\n"));
 232
 233                 ntStatus = STATUS_NOT_IMPLEMENTED;
 234
 235                 break;
 236             }
 237
 238             case FSCTL_UNLOCK_VOLUME:
 239             {
 240                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 241                               AFS_TRACE_LEVEL_VERBOSE_2,
 242                               "AFSProcessUserFsRequest Processing FSCTL_UNLOCK_VOLUME request\n"));
 243
 244                 ntStatus = STATUS_NOT_IMPLEMENTED;
 245
 246                 break;
 247             }
 248
 249             case FSCTL_DISMOUNT_VOLUME:
 250             {
 251                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 252                               AFS_TRACE_LEVEL_VERBOSE_2,
 253                               "AFSProcessUserFsRequest Processing FSCTL_DISMOUNT_VOLUME request\n"));
 254
 255                 ntStatus = STATUS_NOT_IMPLEMENTED;
 256
 257                 break;
 258             }
 259
 260             case FSCTL_MARK_VOLUME_DIRTY:
 261             {
 262                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 263                               AFS_TRACE_LEVEL_VERBOSE_2,
 264                               "AFSProcessUserFsRequest Processing FSCTL_MARK_VOLUME_DIRTY request\n"));
 265
 266                 ntStatus = STATUS_NOT_IMPLEMENTED;
 267
 268                 break;
 269             }
 270
 271             case FSCTL_IS_VOLUME_DIRTY:
 272             {
 273                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 274                               AFS_TRACE_LEVEL_VERBOSE_2,
 275                               "AFSProcessUserFsRequest Processing FSCTL_IS_VOLUME_DIRTY request\n"));
 276
 277                 ntStatus = STATUS_NOT_IMPLEMENTED;
 278
 279                 break;
 280             }
 281
 282             case FSCTL_IS_VOLUME_MOUNTED:
 283             {
 284                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 285                               AFS_TRACE_LEVEL_VERBOSE_2,
 286                               "AFSProcessUserFsRequest Processing FSCTL_IS_VOLUME_MOUNTED request\n"));
 287
 288                 ntStatus = STATUS_NOT_IMPLEMENTED;
 289
 290                 break;
 291             }
 292
 293             case FSCTL_IS_PATHNAME_VALID:
 294             {
 295                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 296                               AFS_TRACE_LEVEL_VERBOSE_2,
 297                               "AFSProcessUserFsRequest Processing FSCTL_IS_PATHNAME_VALID request\n"));
 298
 299                 ntStatus = STATUS_SUCCESS;
 300
 301                 break;
 302             }
 303
 304 #ifndef FSCTL_CSC_INTERNAL
 305 #define FSCTL_CSC_INTERNAL                  CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 107, METHOD_NEITHER, FILE_ANY_ACCESS)
 306 #endif
 307             case FSCTL_CSC_INTERNAL:
 308             {
 309                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 310                               AFS_TRACE_LEVEL_VERBOSE_2,
 311                               "AFSProcessUserFsRequest Processing FSCTL_CSC_INTERNAL request\n"));
 312
 313                 ntStatus = STATUS_INVALID_DEVICE_REQUEST;
 314
 315                 break;
 316             }
 317
 318             case FSCTL_GET_REPARSE_POINT:
 319             {
 320
 321                 REPARSE_GUID_DATA_BUFFER *pReparseBuffer = (REPARSE_GUID_DATA_BUFFER *)Irp->AssociatedIrp.SystemBuffer;
 322                 REPARSE_DATA_BUFFER *pMSFTReparseBuffer = (REPARSE_DATA_BUFFER *)Irp->AssociatedIrp.SystemBuffer;
 323                 ULONG ulRemainingLen = ulOutputBufferLen;
 324                 AFSReparseTagInfo *pReparseInfo = NULL;
 325                 BOOLEAN bRelative = FALSE;
 326                 BOOLEAN bDriveLetter = FALSE;
 327                 WCHAR * PathBuffer = NULL;
 328
 329                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 330                               AFS_TRACE_LEVEL_VERBOSE_2,
 331                               "AFSProcessUserFsRequest Processing FSCTL_GET_REPARSE_POINT request %wZ Type 0x%x Attrib 0x%x\n",
 332                               &pCcb->DirectoryCB->NameInformation.FileName,
 333                               pCcb->DirectoryCB->ObjectInformation->FileType,
 334                               pCcb->DirectoryCB->ObjectInformation->FileAttributes));
 335
 336                 //
 337                 // Check if we have the reparse entry set on the entry
 338                 //
 339
 340                 if( !BooleanFlagOn( pCcb->DirectoryCB->ObjectInformation->FileAttributes, FILE_ATTRIBUTE_REPARSE_POINT))
 341                 {
 342
 343                     ntStatus = STATUS_NOT_A_REPARSE_POINT;
 344
 345                     break;
 346                 }
 347
 348
 349                 switch ( pCcb->DirectoryCB->ObjectInformation->FileType) {
 350                 case AFS_FILE_TYPE_MOUNTPOINT:
 351
 352                     if( ulOutputBufferLen < FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer))
 353                     {
 354
 355                         ntStatus = STATUS_BUFFER_TOO_SMALL;
 356
 357                         Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer);
 358
 359                         break;
 360                     }
 361
 362                     ulRemainingLen -= FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer);
 363
 364                     break;
 365
 366                 default:
 367
 368                     if( ulOutputBufferLen < FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer))
 369                     {
 370
 371                         ntStatus = STATUS_BUFFER_TOO_SMALL;
 372
 373                         Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer);
 374
 375                         break;
 376                     }
 377
 378                     ulRemainingLen -= FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer);
 379
 380                     break;
 381                 }
 382
 383                 //
 384                 // Populate the data in the reparse buffer
 385                 //
 386
 387                 pReparseBuffer->ReparseDataLength  = 0;
 388
 389                 AFSAcquireExcl( &pCcb->DirectoryCB->NonPaged->Lock,
 390                                 TRUE);
 391
 392                 if( pCcb->DirectoryCB->NameInformation.TargetName.Length == 0)
 393                 {
 394
 395                     //
 396                     // We'll reset the DV to ensure we validate the metadata content
 397                     //
 398
 399                     pCcb->DirectoryCB->ObjectInformation->DataVersion.QuadPart = (ULONGLONG)-1;
 400
 401                     SetFlag( pCcb->DirectoryCB->ObjectInformation->Flags, AFS_OBJECT_FLAGS_VERIFY);
 402
 403                     AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 404                                   AFS_TRACE_LEVEL_VERBOSE,
 405                                   "AFSProcessUserFsRequest Verifying symlink %wZ FID %08lX-%08lX-%08lX-%08lX\n",
 406                                   &pCcb->DirectoryCB->NameInformation.FileName,
 407                                   pCcb->DirectoryCB->ObjectInformation->FileId.Cell,
 408                                   pCcb->DirectoryCB->ObjectInformation->FileId.Volume,
 409                                   pCcb->DirectoryCB->ObjectInformation->FileId.Vnode,
 410                                   pCcb->DirectoryCB->ObjectInformation->FileId.Unique));
 411
 412                     ntStatus = AFSVerifyEntry( &pCcb->AuthGroup,
 413                                                pCcb->DirectoryCB);
 414
 415                     if( !NT_SUCCESS( ntStatus))
 416                     {
 417
 418                         AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 419                                       AFS_TRACE_LEVEL_ERROR,
 420                                       "AFSProcessUserFsRequest Failed to verify symlink %wZ FID %08lX-%08lX-%08lX-%08lX Status %08lX\n",
 421                                       &pCcb->DirectoryCB->NameInformation.FileName,
 422                                       pCcb->DirectoryCB->ObjectInformation->FileId.Cell,
 423                                       pCcb->DirectoryCB->ObjectInformation->FileId.Volume,
 424                                       pCcb->DirectoryCB->ObjectInformation->FileId.Vnode,
 425                                       pCcb->DirectoryCB->ObjectInformation->FileId.Unique,
 426                                       ntStatus));
 427
 428                         AFSReleaseResource( &pCcb->DirectoryCB->NonPaged->Lock);
 429
 430                         break;
 431                     }
 432                 }
 433
 434                 pReparseInfo = (AFSReparseTagInfo *)&pReparseBuffer->GenericReparseBuffer.DataBuffer[ 0];
 435
 436                 switch( pCcb->DirectoryCB->ObjectInformation->FileType)
 437                 {
 438
 439                     case AFS_FILE_TYPE_SYMLINK:
 440                     {
 441
 442                         if( pCcb->DirectoryCB->NameInformation.TargetName.Length == 0)
 443                         {
 444
 445                             ntStatus = STATUS_REPARSE_POINT_NOT_RESOLVED;
 446
 447                             break;
 448                         }
 449
 450                         bRelative = AFSIsRelativeName( &pCcb->DirectoryCB->NameInformation.TargetName);
 451
 452                         if ( bRelative)
 453                         {
 454
 455                             if( ulRemainingLen < (ULONG) FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 456                                 pCcb->DirectoryCB->NameInformation.TargetName.Length)
 457                             {
 458
 459                                 ntStatus = STATUS_BUFFER_TOO_SMALL;
 460
 461                                 Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 462                                     pCcb->DirectoryCB->NameInformation.TargetName.Length;
 463
 464                                 break;
 465                             }
 466
 467                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.Flags = SYMLINK_FLAG_RELATIVE;
 468
 469                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength =
 470                                 pCcb->DirectoryCB->NameInformation.TargetName.Length;
 471
 472                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength =
 473                                 pCcb->DirectoryCB->NameInformation.TargetName.Length;
 474
 475                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameOffset = 0;
 476
 477                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
 478
 479                             PathBuffer = pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PathBuffer;
 480
 481                             RtlCopyMemory( PathBuffer,
 482                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 483                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 484
 485                             pReparseBuffer->ReparseDataLength = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
 486                                 FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 487                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
 488                         }
 489                         else
 490                         {
 491
 492                             if( ulRemainingLen < (ULONG) FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 493                                 /* Display Name */
 494                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 1 * sizeof( WCHAR) +
 495                                 /* Substitute Name */
 496                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 7 * sizeof( WCHAR))
 497                             {
 498
 499                                 ntStatus = STATUS_BUFFER_TOO_SMALL;
 500
 501                                 Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 502                                     pCcb->DirectoryCB->NameInformation.TargetName.Length + 1 * sizeof( WCHAR) +
 503                                     pCcb->DirectoryCB->NameInformation.TargetName.Length + 7 * sizeof( WCHAR);
 504
 505                                 break;
 506                             }
 507
 508                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.Flags = 0;
 509
 510                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength =
 511                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 7 * sizeof( WCHAR);
 512
 513                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength =
 514                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 1 * sizeof( WCHAR);
 515
 516                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameOffset =
 517                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength;
 518
 519                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
 520
 521                             PathBuffer = pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PathBuffer;
 522
 523                             /* Display Name */
 524                             *PathBuffer++ = L'\\';
 525
 526                             RtlCopyMemory( PathBuffer,
 527                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 528                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 529
 530                             PathBuffer += pCcb->DirectoryCB->NameInformation.TargetName.Length / sizeof( WCHAR);
 531
 532                             /* Substitute Name */
 533                             *PathBuffer++ = L'\\';
 534                             *PathBuffer++ = L'?';
 535                             *PathBuffer++ = L'?';
 536                             *PathBuffer++ = L'\\';
 537                             *PathBuffer++ = L'U';
 538                             *PathBuffer++ = L'N';
 539                             *PathBuffer++ = L'C';
 540
 541                             RtlCopyMemory( PathBuffer,
 542                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 543                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 544
 545                             pReparseBuffer->ReparseDataLength = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
 546                                 FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 547                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength +
 548                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
 549                         }
 550
 551                         break;
 552                     }
 553
 554                     case AFS_FILE_TYPE_MOUNTPOINT:
 555                     {
 556                         UNICODE_STRING Cell, Volume;
 557                         USHORT Type;
 558
 559                         if( pCcb->DirectoryCB->NameInformation.TargetName.Length == 0)
 560                         {
 561                             ntStatus = STATUS_REPARSE_POINT_NOT_RESOLVED;
 562
 563                             break;
 564                         }
 565
 566                         if ( !AFSParseMountPointTarget( &pCcb->DirectoryCB->NameInformation.TargetName,
 567                                                         &Type,
 568                                                         &Volume,
 569                                                         &Cell))
 570                         {
 571                             ntStatus = STATUS_INVALID_PARAMETER;
 572
 573                             break;
 574                         }
 575
 576                         if( ulRemainingLen < (ULONG) FIELD_OFFSET( AFSReparseTagInfo, AFSMountPoint.Buffer) + Volume.Length + Cell.Length)
 577                         {
 578
 579                             ntStatus = STATUS_BUFFER_TOO_SMALL;
 580
 581                             Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 582                                                         FIELD_OFFSET( AFSReparseTagInfo, AFSMountPoint.Buffer) +
 583                                                         Volume.Length + Cell.Length;
 584
 585                             break;
 586                         }
 587
 588                         pReparseInfo->SubTag = OPENAFS_SUBTAG_MOUNTPOINT;
 589
 590                         pReparseInfo->AFSMountPoint.Type = Type;
 591
 592                         pReparseInfo->AFSMountPoint.MountPointCellLength = Cell.Length;
 593
 594                         pReparseInfo->AFSMountPoint.MountPointVolumeLength = Volume.Length;
 595
 596                         RtlCopyMemory( pReparseInfo->AFSMountPoint.Buffer,
 597                                        Cell.Buffer,
 598                                        Cell.Length);
 599
 600                         RtlCopyMemory( &pReparseInfo->AFSMountPoint.Buffer[ Cell.Length / sizeof( WCHAR)],
 601                                        Volume.Buffer,
 602                                        Volume.Length);
 603
 604                         pReparseBuffer->ReparseDataLength = (FIELD_OFFSET( AFSReparseTagInfo, AFSMountPoint.Buffer) + Volume.Length + Cell.Length);
 605
 606                         break;
 607                     }
 608
 609                     case AFS_FILE_TYPE_DFSLINK:
 610                     {
 611
 612                         if( pCcb->DirectoryCB->NameInformation.TargetName.Length == 0)
 613                         {
 614
 615                             ntStatus = STATUS_REPARSE_POINT_NOT_RESOLVED;
 616
 617                             break;
 618                         }
 619
 620                         bRelative = ( pCcb->DirectoryCB->NameInformation.TargetName.Buffer[0] == L'\\');
 621
 622                         bDriveLetter = (bRelative == FALSE && pCcb->DirectoryCB->NameInformation.TargetName.Buffer[1] == L':');
 623
 624                         if ( bRelative)
 625                         {
 626
 627                             if( ulRemainingLen < (ULONG) FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 628                                 pCcb->DirectoryCB->NameInformation.TargetName.Length)
 629                             {
 630
 631                                 ntStatus = STATUS_BUFFER_TOO_SMALL;
 632
 633                                 Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 634                                     pCcb->DirectoryCB->NameInformation.TargetName.Length;
 635
 636                                 break;
 637                             }
 638
 639                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.Flags = SYMLINK_FLAG_RELATIVE;
 640
 641                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength =
 642                                 pCcb->DirectoryCB->NameInformation.TargetName.Length;
 643
 644                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength =
 645                                 pCcb->DirectoryCB->NameInformation.TargetName.Length;
 646
 647                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameOffset = 0;
 648
 649                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
 650
 651                             PathBuffer = pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PathBuffer;
 652
 653                             RtlCopyMemory( PathBuffer,
 654                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 655                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 656
 657                             pReparseBuffer->ReparseDataLength = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
 658                                 FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 659                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
 660                         }
 661                         else if ( bDriveLetter)
 662                         {
 663
 664                             if( ulRemainingLen < (ULONG) FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 665                                 /* Display Name */
 666                                 pCcb->DirectoryCB->NameInformation.TargetName.Length +
 667                                 /* Substitute Name */
 668                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 4 * sizeof( WCHAR))
 669                             {
 670
 671                                 ntStatus = STATUS_BUFFER_TOO_SMALL;
 672
 673                                 Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 674                                     pCcb->DirectoryCB->NameInformation.TargetName.Length +
 675                                     pCcb->DirectoryCB->NameInformation.TargetName.Length + 4 * sizeof( WCHAR);
 676
 677                                 break;
 678                             }
 679
 680                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.Flags = 0;
 681
 682                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength =
 683                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 4 * sizeof( WCHAR);
 684
 685                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength =
 686                                 pCcb->DirectoryCB->NameInformation.TargetName.Length;
 687
 688                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameOffset =
 689                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength;
 690
 691                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
 692
 693                             PathBuffer = pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PathBuffer;
 694
 695                             /* Display Name */
 696                             RtlCopyMemory( PathBuffer,
 697                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 698                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 699
 700                             PathBuffer += pCcb->DirectoryCB->NameInformation.TargetName.Length / sizeof( WCHAR);
 701
 702                             /* Substitute Name */
 703                             *PathBuffer++ = L'\\';
 704                             *PathBuffer++ = L'?';
 705                             *PathBuffer++ = L'?';
 706                             *PathBuffer++ = L'\\';
 707
 708                             RtlCopyMemory( PathBuffer,
 709                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 710                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 711
 712                             pReparseBuffer->ReparseDataLength = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
 713                                 FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 714                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength +
 715                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
 716                         }
 717                         else
 718                         {
 719
 720                             if( ulRemainingLen < (ULONG) FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 721                                 /* Display Name */
 722                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 1 * sizeof( WCHAR) +
 723                                 /* Substitute Name */
 724                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 7 * sizeof( WCHAR))
 725                             {
 726
 727                                 ntStatus = STATUS_BUFFER_TOO_SMALL;
 728
 729                                 Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) +
 730                                     pCcb->DirectoryCB->NameInformation.TargetName.Length + 1 * sizeof( WCHAR) +
 731                                     pCcb->DirectoryCB->NameInformation.TargetName.Length + 7 * sizeof( WCHAR);
 732
 733                                 break;
 734                             }
 735
 736                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.Flags = 0;
 737
 738                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength =
 739                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 7 * sizeof( WCHAR);
 740
 741                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength =
 742                                 pCcb->DirectoryCB->NameInformation.TargetName.Length + 1 * sizeof( WCHAR);
 743
 744                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameOffset =
 745                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength;
 746
 747                             pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameOffset = 0;
 748
 749                             PathBuffer = pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PathBuffer;
 750
 751                             /* Display Name */
 752                             *PathBuffer++ = L'\\';
 753
 754                             RtlCopyMemory( PathBuffer,
 755                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 756                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 757
 758                             PathBuffer += pCcb->DirectoryCB->NameInformation.TargetName.Length / sizeof( WCHAR);
 759
 760                             /* Substitute Name */
 761                             *PathBuffer++ = L'\\';
 762                             *PathBuffer++ = L'?';
 763                             *PathBuffer++ = L'?';
 764                             *PathBuffer++ = L'\\';
 765                             *PathBuffer++ = L'U';
 766                             *PathBuffer++ = L'N';
 767                             *PathBuffer++ = L'C';
 768
 769                             RtlCopyMemory( PathBuffer,
 770                                            pCcb->DirectoryCB->NameInformation.TargetName.Buffer,
 771                                            pCcb->DirectoryCB->NameInformation.TargetName.Length);
 772
 773                             pReparseBuffer->ReparseDataLength = FIELD_OFFSET( REPARSE_DATA_BUFFER, SymbolicLinkReparseBuffer.PathBuffer) -
 774                                 FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 775                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.PrintNameLength +
 776                                 pMSFTReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
 777                         }
 778
 779                         break;
 780                     }
 781
 782                     default:
 783
 784                         ntStatus = STATUS_NOT_A_REPARSE_POINT;
 785
 786                         break;
 787                 }
 788
 789                 if ( ntStatus == STATUS_SUCCESS)
 790                 {
 791
 792                     ulRemainingLen -= pReparseBuffer->ReparseDataLength;
 793
 794                     if ( pCcb->DirectoryCB->ObjectInformation->FileType == AFS_FILE_TYPE_MOUNTPOINT)
 795                     {
 796
 797                         pReparseBuffer->ReparseTag = IO_REPARSE_TAG_SURROGATE|IO_REPARSE_TAG_OPENAFS_DFS;
 798
 799                         RtlCopyMemory( &pReparseBuffer->ReparseGuid,
 800                                        &GUID_AFS_REPARSE_GUID,
 801                                        sizeof( GUID));
 802
 803                         Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer)
 804                             + pReparseBuffer->ReparseDataLength;
 805                     }
 806                     else
 807                     {
 808
 809                         pReparseBuffer->ReparseTag = IO_REPARSE_TAG_SYMLINK;
 810
 811                         Irp->IoStatus.Information = FIELD_OFFSET( REPARSE_DATA_BUFFER, GenericReparseBuffer.DataBuffer)
 812                             + pReparseBuffer->ReparseDataLength;
 813                     }
 814                 }
 815
 816                 AFSReleaseResource( &pCcb->DirectoryCB->NonPaged->Lock);
 817
 818                 break;
 819             }
 820
 821             case FSCTL_SET_REPARSE_POINT:
 822             {
 823
 824                 REPARSE_GUID_DATA_BUFFER *pReparseGUIDBuffer = (REPARSE_GUID_DATA_BUFFER *)Irp->AssociatedIrp.SystemBuffer;
 825                 REPARSE_DATA_BUFFER *pReparseBuffer = NULL;
 826                 AFSReparseTagInfo *pReparseInfo = NULL;
 827                 AFSObjectInfoCB *pParentObjectInfo = NULL;
 828                 UNICODE_STRING uniTargetName;
 829                 ULONGLONG ullIndex = 0;
 830                 LONG lCount;
 831
 832                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 833                               AFS_TRACE_LEVEL_VERBOSE,
 834                               "AFSProcessUserFsRequest Processing FSCTL_SET_REPARSE_POINT request %wZ Type 0x%x Attrib 0x%x\n",
 835                               &pCcb->DirectoryCB->NameInformation.FileName,
 836                               pCcb->DirectoryCB->ObjectInformation->FileType,
 837                               pCcb->DirectoryCB->ObjectInformation->FileAttributes));
 838
 839                 if( ulInputBufferLen < FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer))
 840                 {
 841
 842                     ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 843
 844                     break;
 845                 }
 846
 847                 if( (pReparseGUIDBuffer->ReparseTag & 0x0000FFFF) == IO_REPARSE_TAG_OPENAFS_DFS)
 848                 {
 849
 850                     if( RtlCompareMemory( &pReparseGUIDBuffer->ReparseGuid,
 851                                           &GUID_AFS_REPARSE_GUID,
 852                                           sizeof( GUID)) != sizeof( GUID))
 853                     {
 854
 855                         ntStatus = STATUS_REPARSE_ATTRIBUTE_CONFLICT;
 856
 857                         break;
 858                     }
 859
 860                     if( ulInputBufferLen < FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 861                                                                         sizeof( AFSReparseTagInfo))
 862                     {
 863
 864                         ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 865
 866                         break;
 867                     }
 868
 869                     pReparseInfo = (AFSReparseTagInfo *)pReparseGUIDBuffer->GenericReparseBuffer.DataBuffer;
 870
 871                     switch( pReparseInfo->SubTag)
 872                     {
 873
 874                         case OPENAFS_SUBTAG_SYMLINK:
 875                         {
 876
 877                             if( ulInputBufferLen < (ULONG)(FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 878                                                            FIELD_OFFSET( AFSReparseTagInfo, AFSSymLink.Buffer) +
 879                                                            pReparseInfo->AFSSymLink.SymLinkTargetLength))
 880                             {
 881
 882                                 ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 883
 884                                 break;
 885                             }
 886
 887                             uniTargetName.Length = pReparseInfo->AFSSymLink.SymLinkTargetLength;
 888                             uniTargetName.MaximumLength = uniTargetName.Length;
 889
 890                             uniTargetName.Buffer = (WCHAR *)pReparseInfo->AFSSymLink.Buffer;
 891
 892                             break;
 893                         }
 894
 895                         case OPENAFS_SUBTAG_UNC:
 896                         {
 897
 898                             if( ulInputBufferLen < (ULONG)(FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer) +
 899                                                            FIELD_OFFSET( AFSReparseTagInfo, UNCReferral.Buffer) +
 900                                                            pReparseInfo->UNCReferral.UNCTargetLength))
 901                             {
 902
 903                                 ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 904
 905                                 break;
 906                             }
 907
 908                             uniTargetName.Length = pReparseInfo->UNCReferral.UNCTargetLength;
 909                             uniTargetName.MaximumLength = uniTargetName.Length;
 910
 911                             uniTargetName.Buffer = (WCHAR *)pReparseInfo->UNCReferral.Buffer;
 912
 913                             break;
 914                         }
 915
 916                         case OPENAFS_SUBTAG_MOUNTPOINT:
 917                             //
 918                             // Not yet handled
 919                             //
 920                         default:
 921                         {
 922
 923                             ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 924
 925                             break;
 926                         }
 927                     }
 928                 }
 929                 else
 930                 {
 931                     //
 932                     // Handle Microsoft Reparse Tags
 933                     //
 934
 935                     switch( pReparseGUIDBuffer->ReparseTag)
 936                     {
 937
 938                         case IO_REPARSE_TAG_MOUNT_POINT:
 939                         {
 940
 941                             pReparseBuffer = (REPARSE_DATA_BUFFER *)Irp->AssociatedIrp.SystemBuffer;
 942
 943                             uniTargetName.Length = pReparseBuffer->MountPointReparseBuffer.PrintNameLength;
 944                             uniTargetName.MaximumLength = uniTargetName.Length;
 945
 946                             uniTargetName.Buffer = (WCHAR *)((char *)pReparseBuffer->MountPointReparseBuffer.PathBuffer +
 947                                                               pReparseBuffer->MountPointReparseBuffer.PrintNameOffset);
 948
 949                             AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 950                                           AFS_TRACE_LEVEL_VERBOSE_2,
 951                                           "AFSProcessUserFsRequest IO_REPARSE_TAG_MOUNT_POINT request %wZ\n",
 952                                           &uniTargetName));
 953
 954                             ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 955
 956                             break;
 957                         }
 958
 959                         case IO_REPARSE_TAG_SYMLINK:
 960                         {
 961
 962                             pReparseBuffer = (REPARSE_DATA_BUFFER *)Irp->AssociatedIrp.SystemBuffer;
 963
 964                             uniTargetName.Length = pReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameLength;
 965                             uniTargetName.MaximumLength = uniTargetName.Length;
 966
 967                             uniTargetName.Buffer = (WCHAR *)((char *)pReparseBuffer->SymbolicLinkReparseBuffer.PathBuffer +
 968                                                               pReparseBuffer->SymbolicLinkReparseBuffer.SubstituteNameOffset);
 969
 970                             AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
 971                                           AFS_TRACE_LEVEL_VERBOSE_2,
 972                                           "AFSProcessUserFsRequest IO_REPARSE_TAG_SYMLINK request %wZ\n",
 973                                           &uniTargetName));
 974                             break;
 975                         }
 976
 977                         default:
 978                         {
 979
 980                             ntStatus = STATUS_IO_REPARSE_DATA_INVALID;
 981
 982                             break;
 983                         }
 984                     }
 985                 }
 986
 987                 if( !NT_SUCCESS( ntStatus))
 988                 {
 989
 990                     break;
 991                 }
 992
 993                 //
 994                 // First thing is to locate/create our object information block
 995                 // for this entry
 996                 //
 997
 998                 AFSAcquireExcl( pCcb->DirectoryCB->ObjectInformation->VolumeCB->ObjectInfoTree.TreeLock,
 999                                 TRUE);
1000
1001                 ullIndex = AFSCreateLowIndex( &pCcb->DirectoryCB->ObjectInformation->ParentFileId);
1002
1003                 ntStatus = AFSLocateHashEntry( pCcb->DirectoryCB->ObjectInformation->VolumeCB->ObjectInfoTree.TreeHead,
1004                                                ullIndex,
1005                                                (AFSBTreeEntry **)&pParentObjectInfo);
1006
1007                 if ( NT_SUCCESS( ntStatus))
1008                 {
1009
1010                     lCount = AFSObjectInfoIncrement( pParentObjectInfo,
1011                                                      AFS_OBJECT_REFERENCE_DIRENTRY);
1012
1013                     AFSDbgTrace(( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
1014                                   AFS_TRACE_LEVEL_VERBOSE,
1015                                   "AFSProcessUserFsRequest Increment count on object %p Cnt %d\n",
1016                                   pParentObjectInfo,
1017                                   lCount));
1018                 }
1019
1020                 AFSReleaseResource( pCcb->DirectoryCB->ObjectInformation->VolumeCB->ObjectInfoTree.TreeLock);
1021
1022                 if ( NT_SUCCESS( ntStatus))
1023                 {
1024
1025                     //
1026                     // Extract out the information to the call to the service
1027                     //
1028
1029                     ntStatus = AFSCreateSymlink( &pCcb->AuthGroup,
1030                                                  pParentObjectInfo,
1031                                                  &pCcb->DirectoryCB->NameInformation.FileName,
1032                                                  pCcb->DirectoryCB->ObjectInformation,
1033                                                  &uniTargetName);
1034
1035                     AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
1036                                   AFS_TRACE_LEVEL_VERBOSE_2,
1037                                   "AFSProcessUserFsRequest Processed FSCTL_SET_REPARSE_POINT request %wZ Type 0x%x Attrib 0x%x Status %08lX\n",
1038                                   &pCcb->DirectoryCB->NameInformation.FileName,
1039                                   pCcb->DirectoryCB->ObjectInformation->FileType,
1040                                   pCcb->DirectoryCB->ObjectInformation->FileAttributes,
1041                                   ntStatus));
1042
1043                     lCount = AFSObjectInfoDecrement( pParentObjectInfo,
1044                                                      AFS_OBJECT_REFERENCE_DIRENTRY);
1045
1046                     AFSDbgTrace(( AFS_SUBSYSTEM_OBJECT_REF_COUNTING,
1047                                   AFS_TRACE_LEVEL_VERBOSE,
1048                                   "AFSProcessUserFsRequest Decrement count on object %p Cnt %d\n",
1049                                   pParentObjectInfo,
1050                                   lCount));
1051                 }
1052
1053                 break;
1054             }
1055
1056             case FSCTL_DELETE_REPARSE_POINT:
1057             {
1058
1059                 REPARSE_GUID_DATA_BUFFER *pReparseBuffer = (REPARSE_GUID_DATA_BUFFER *)Irp->AssociatedIrp.SystemBuffer;
1060
1061                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
1062                               AFS_TRACE_LEVEL_VERBOSE_2,
1063                               "AFSProcessUserFsRequest Processing FSCTL_DELETE_REPARSE_POINT request %wZ Type 0x%x Attrib 0x%x\n",
1064                               &pCcb->DirectoryCB->NameInformation.FileName,
1065                               pCcb->DirectoryCB->ObjectInformation->FileType,
1066                               pCcb->DirectoryCB->ObjectInformation->FileAttributes));
1067
1068                 //
1069                 // Check if we have the reparse entry set on the entry
1070                 //
1071
1072                 if( !BooleanFlagOn( pCcb->DirectoryCB->ObjectInformation->FileAttributes, FILE_ATTRIBUTE_REPARSE_POINT))
1073                 {
1074
1075                     ntStatus = STATUS_NOT_A_REPARSE_POINT;
1076
1077                     break;
1078                 }
1079
1080                 if( ulInputBufferLen < FIELD_OFFSET( REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer.DataBuffer))
1081                 {
1082
1083                     ntStatus = STATUS_INVALID_PARAMETER;
1084
1085                     break;
1086                 }
1087
1088                 if( (pReparseBuffer->ReparseTag & 0x0000FFFF) != IO_REPARSE_TAG_OPENAFS_DFS)
1089                 {
1090
1091                     ntStatus = STATUS_IO_REPARSE_TAG_MISMATCH;
1092
1093                     break;
1094                 }
1095
1096                 if( RtlCompareMemory( &pReparseBuffer->ReparseGuid,
1097                                       &GUID_AFS_REPARSE_GUID,
1098                                       sizeof( GUID)) != sizeof( GUID))
1099                 {
1100
1101                     ntStatus = STATUS_REPARSE_ATTRIBUTE_CONFLICT;
1102
1103                     break;
1104                 }
1105
1106                 //
1107                 // Claim success.  The typical usage is setting delete on close
1108                 // as the next operation on the reparse point before closing
1109                 // the handle.
1110                 //
1111
1112                 ntStatus = STATUS_SUCCESS;
1113
1114                 break;
1115             }
1116
1117 #ifndef FSCTL_SET_PURGE_FAILURE_MODE
1118 #define FSCTL_SET_PURGE_FAILURE_MODE        CTL_CODE(FILE_DEVICE_FILE_SYSTEM, 156, METHOD_BUFFERED, FILE_ANY_ACCESS)
1119 #endif
1120
1121             case FSCTL_SET_PURGE_FAILURE_MODE:
1122             {
1123
1124                 //
1125                 // For the time being just succeed this call
1126                 //
1127
1128                 ntStatus = STATUS_SUCCESS;
1129
1130                 break;
1131             }
1132
1133             default :
1134             {
1135
1136                 AFSDbgTrace(( AFS_SUBSYSTEM_FILE_PROCESSING,
1137                               AFS_TRACE_LEVEL_VERBOSE_2,
1138                               "AFSProcessUserFsRequest Processing default (%08lX) request\n",
1139                               ulFsControlCode));
1140
1141                 ntStatus = STATUS_INVALID_DEVICE_REQUEST;
1142
1143                 break;
1144             }
1145         }
1146
1147 try_exit:
1148
1149         NOTHING;
1150     }
1151
1152     return ntStatus;
1153 }
1154
1155 NTSTATUS
1156 AFSProcessShareFsCtrl( IN IRP *Irp,
1157                        IN AFSFcb *Fcb,
1158                        IN AFSCcb *Ccb)
1159 {
1160
1161     UNREFERENCED_PARAMETER(Fcb);
1162     NTSTATUS ntStatus = STATUS_SUCCESS;
1163     PIO_STACK_LOCATION pIrpSp = IoGetCurrentIrpStackLocation( Irp);
1164     ULONG ulOutputBufferLen = 0, ulInputBufferLen;
1165     ULONG ulFsControlCode;
1166
1167     __Enter
1168     {
1169
1170         ulFsControlCode = pIrpSp->Parameters.FileSystemControl.FsControlCode;
1171
1172         ulOutputBufferLen = pIrpSp->Parameters.FileSystemControl.OutputBufferLength;
1173         ulInputBufferLen = pIrpSp->Parameters.FileSystemControl.InputBufferLength;
1174
1175         switch( ulFsControlCode)
1176         {
1177
1178             case FSCTL_PIPE_TRANSCEIVE:
1179             {
1180
1181                 AFSDbgTrace(( AFS_SUBSYSTEM_PIPE_PROCESSING,
1182                               AFS_TRACE_LEVEL_VERBOSE,
1183                               "AFSProcessShareFsCtrl On pipe %wZ Class FSCTL_PIPE_TRANSCEIVE\n",
1184                               &Ccb->DirectoryCB->NameInformation.FileName));
1185
1186                 ntStatus = AFSNotifyPipeTransceive( Ccb,
1187                                                     ulInputBufferLen,
1188                                                     ulOutputBufferLen,
1189                                                     pIrpSp->Parameters.FileSystemControl.Type3InputBuffer,
1190                                                     Irp->UserBuffer,
1191                                                     (ULONG *)&Irp->IoStatus.Information);
1192
1193                 if( !NT_SUCCESS( ntStatus))
1194                 {
1195
1196                     AFSDbgTrace(( AFS_SUBSYSTEM_PIPE_PROCESSING,
1197                                   AFS_TRACE_LEVEL_VERBOSE,
1198                                   "AFSProcessShareFsCtrl Failure on pipe %wZ Class FSCTL_PIPE_TRANSCEIVE Status %08lX\n",
1199                                   &Ccb->DirectoryCB->NameInformation.FileName,
1200                                   ntStatus));
1201                 }
1202
1203                 break;
1204             }
1205
1206             default:
1207             {
1208
1209                 AFSPrint( "AFSProcessShareFsCtrl (%08lX) For IPC$ input %08lX output %08lX\n",
1210                           ulFsControlCode,
1211                           ulInputBufferLen,
1212                           ulOutputBufferLen);
1213
1214                 break;
1215             }
1216         }
1217     }
1218
1219     return ntStatus;
1220 }