reactos/drivers/filesystems/ntfs/fsctl.c

   1 /*
   2  *  ReactOS kernel
   3  *  Copyright (C) 2002 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
  18  *
  19  * COPYRIGHT:        See COPYING in the top level directory
  20  * PROJECT:          ReactOS kernel
  21  * FILE:             drivers/filesystems/ntfs/fsctl.c
  22  * PURPOSE:          NTFS filesystem driver
  23  * PROGRAMMER:       Eric Kohl
  24  *                   Valentin Verkhovsky
  25  *                   Pierre Schweitzer
  26  */
  27
  28 /* INCLUDES *****************************************************************/
  29
  30 #include "ntfs.h"
  31
  32 #include <ntdddisk.h>
  33
  34 #define NDEBUG
  35 #include <debug.h>
  36
  37 /* FUNCTIONS ****************************************************************/
  38
  39 /*
  40  * FUNCTION: Tests if the device contains a filesystem that can be mounted
  41  *           by this fsd.
  42  */
  43 static
  44 NTSTATUS
  45 NtfsHasFileSystem(PDEVICE_OBJECT DeviceToMount)
  46 {
  47     PARTITION_INFORMATION PartitionInfo;
  48     DISK_GEOMETRY DiskGeometry;
  49     ULONG ClusterSize, Size, k;
  50     PBOOT_SECTOR BootSector;
  51     NTSTATUS Status;
  52
  53     DPRINT1("NtfsHasFileSystem() called\n");
  54
  55     Size = sizeof(DISK_GEOMETRY);
  56     Status = NtfsDeviceIoControl(DeviceToMount,
  57                                  IOCTL_DISK_GET_DRIVE_GEOMETRY,
  58                                  NULL,
  59                                  0,
  60                                  &DiskGeometry,
  61                                  &Size,
  62                                  TRUE);
  63     if (!NT_SUCCESS(Status))
  64     {
  65         DPRINT1("NtfsDeviceIoControl() failed (Status %lx)\n", Status);
  66         return Status;
  67     }
  68
  69     if (DiskGeometry.MediaType == FixedMedia)
  70     {
  71         /* We have found a hard disk */
  72         Size = sizeof(PARTITION_INFORMATION);
  73         Status = NtfsDeviceIoControl(DeviceToMount,
  74                                      IOCTL_DISK_GET_PARTITION_INFO,
  75                                      NULL,
  76                                      0,
  77                                      &PartitionInfo,
  78                                      &Size,
  79                                      TRUE);
  80         if (!NT_SUCCESS(Status))
  81         {
  82             DPRINT1("NtfsDeviceIoControl() failed (Status %lx)\n", Status);
  83             return Status;
  84         }
  85
  86         if (PartitionInfo.PartitionType != PARTITION_IFS)
  87         {
  88             DPRINT1("Invalid partition type\n");
  89             return STATUS_UNRECOGNIZED_VOLUME;
  90         }
  91     }
  92
  93     DPRINT1("BytesPerSector: %lu\n", DiskGeometry.BytesPerSector);
  94     BootSector = ExAllocatePoolWithTag(NonPagedPool,
  95                                        DiskGeometry.BytesPerSector,
  96                                        TAG_NTFS);
  97     if (BootSector == NULL)
  98     {
  99         return STATUS_INSUFFICIENT_RESOURCES;
 100     }
 101
 102     Status = NtfsReadSectors(DeviceToMount,
 103                              0,
 104                              1,
 105                              DiskGeometry.BytesPerSector,
 106                              (PVOID)BootSector,
 107                              TRUE);
 108     if (!NT_SUCCESS(Status))
 109     {
 110         goto ByeBye;
 111     }
 112
 113     /*
 114      * Check values of different fields. If those fields have not expected
 115      * values, we fail, to avoid mounting partitions that Windows won't mount.
 116      */
 117
 118     /* OEMID: this field must be NTFS */
 119     if (RtlCompareMemory(BootSector->OEMID, "NTFS    ", 8) != 8)
 120     {
 121         DPRINT1("Failed with NTFS-identifier: [%.8s]\n", BootSector->OEMID);
 122         Status = STATUS_UNRECOGNIZED_VOLUME;
 123         goto ByeBye;
 124     }
 125
 126     /* Unused0: this field must be COMPLETELY null */
 127     for (k = 0; k < 7; k++)
 128     {
 129         if (BootSector->BPB.Unused0[k] != 0)
 130         {
 131             DPRINT1("Failed in field Unused0: [%.7s]\n", BootSector->BPB.Unused0);
 132             Status = STATUS_UNRECOGNIZED_VOLUME;
 133             goto ByeBye;
 134         }
 135     }
 136
 137     /* Unused3: this field must be COMPLETELY null */
 138     for (k = 0; k < 4; k++)
 139     {
 140         if (BootSector->BPB.Unused3[k] != 0)
 141         {
 142             DPRINT1("Failed in field Unused3: [%.4s]\n", BootSector->BPB.Unused3);
 143             Status = STATUS_UNRECOGNIZED_VOLUME;
 144             goto ByeBye;
 145         }
 146     }
 147
 148     /* Check cluster size */
 149     ClusterSize = BootSector->BPB.BytesPerSector * BootSector->BPB.SectorsPerCluster;
 150     if (ClusterSize != 512 && ClusterSize != 1024 &&
 151         ClusterSize != 2048 && ClusterSize != 4096 &&
 152         ClusterSize != 8192 && ClusterSize != 16384 &&
 153         ClusterSize != 32768 && ClusterSize != 65536)
 154     {
 155         DPRINT1("Cluster size failed: %hu, %hu, %hu\n",
 156                 BootSector->BPB.BytesPerSector,
 157                 BootSector->BPB.SectorsPerCluster,
 158                 ClusterSize);
 159         Status = STATUS_UNRECOGNIZED_VOLUME;
 160         goto ByeBye;
 161     }
 162
 163 ByeBye:
 164     ExFreePool(BootSector);
 165
 166     return Status;
 167 }
 168
 169
 170 static
 171 ULONG
 172 NtfsQueryMftZoneReservation(VOID)
 173 {
 174     ULONG ZoneReservation = 1;
 175     RTL_QUERY_REGISTRY_TABLE QueryTable[2];
 176
 177     RtlZeroMemory(QueryTable, sizeof(QueryTable));
 178     QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
 179     QueryTable[0].Name = L"NtfsMftZoneReservation";
 180     QueryTable[0].EntryContext = &ZoneReservation;
 181
 182     RtlQueryRegistryValues(RTL_REGISTRY_CONTROL,
 183                            L"FileSystem",
 184                            QueryTable,
 185                            NULL,
 186                            NULL);
 187
 188     return ZoneReservation;
 189 }
 190
 191
 192 static
 193 NTSTATUS
 194 NtfsGetVolumeData(PDEVICE_OBJECT DeviceObject,
 195                   PDEVICE_EXTENSION DeviceExt)
 196 {
 197     DISK_GEOMETRY DiskGeometry;
 198     PFILE_RECORD_HEADER VolumeRecord;
 199     PVOLINFO_ATTRIBUTE VolumeInfo;
 200     PBOOT_SECTOR BootSector;
 201     ULONG Size;
 202     PNTFS_INFO NtfsInfo = &DeviceExt->NtfsInfo;
 203     NTSTATUS Status;
 204     PNTFS_ATTR_CONTEXT AttrCtxt;
 205     PNTFS_ATTR_RECORD Attribute;
 206     PNTFS_FCB VolumeFcb;
 207     PWSTR VolumeNameU;
 208
 209     DPRINT("NtfsGetVolumeData() called\n");
 210
 211     Size = sizeof(DISK_GEOMETRY);
 212     Status = NtfsDeviceIoControl(DeviceObject,
 213                                  IOCTL_DISK_GET_DRIVE_GEOMETRY,
 214                                  NULL,
 215                                  0,
 216                                  &DiskGeometry,
 217                                  &Size,
 218                                  TRUE);
 219     if (!NT_SUCCESS(Status))
 220     {
 221         DPRINT("NtfsDeviceIoControl() failed (Status %lx)\n", Status);
 222         return Status;
 223     }
 224
 225     DPRINT("BytesPerSector: %lu\n", DiskGeometry.BytesPerSector);
 226     BootSector = ExAllocatePoolWithTag(NonPagedPool,
 227                                        DiskGeometry.BytesPerSector,
 228                                        TAG_NTFS);
 229     if (BootSector == NULL)
 230     {
 231         return STATUS_INSUFFICIENT_RESOURCES;
 232     }
 233
 234     Status = NtfsReadSectors(DeviceObject,
 235                              0, /* Partition boot sector */
 236                              1,
 237                              DiskGeometry.BytesPerSector,
 238                              (PVOID)BootSector,
 239                              TRUE);
 240     if (!NT_SUCCESS(Status))
 241     {
 242         ExFreePool(BootSector);
 243         return Status;
 244     }
 245
 246     /* Read data from the bootsector */
 247     NtfsInfo->BytesPerSector = BootSector->BPB.BytesPerSector;
 248     NtfsInfo->SectorsPerCluster = BootSector->BPB.SectorsPerCluster;
 249     NtfsInfo->BytesPerCluster = BootSector->BPB.BytesPerSector * BootSector->BPB.SectorsPerCluster;
 250     NtfsInfo->SectorCount = BootSector->EBPB.SectorCount;
 251     NtfsInfo->ClusterCount = DeviceExt->NtfsInfo.SectorCount / (ULONGLONG)DeviceExt->NtfsInfo.SectorsPerCluster;
 252
 253     NtfsInfo->MftStart.QuadPart = BootSector->EBPB.MftLocation;
 254     NtfsInfo->MftMirrStart.QuadPart = BootSector->EBPB.MftMirrLocation;
 255     NtfsInfo->SerialNumber = BootSector->EBPB.SerialNumber;
 256     if (BootSector->EBPB.ClustersPerMftRecord > 0)
 257         NtfsInfo->BytesPerFileRecord = BootSector->EBPB.ClustersPerMftRecord * NtfsInfo->BytesPerCluster;
 258     else
 259         NtfsInfo->BytesPerFileRecord = 1 << (-BootSector->EBPB.ClustersPerMftRecord);
 260     if (BootSector->EBPB.ClustersPerIndexRecord > 0)
 261         NtfsInfo->BytesPerIndexRecord = BootSector->EBPB.ClustersPerIndexRecord * NtfsInfo->BytesPerCluster;
 262     else
 263         NtfsInfo->BytesPerIndexRecord = 1 << (-BootSector->EBPB.ClustersPerIndexRecord);
 264
 265     DPRINT("Boot sector information:\n");
 266     DPRINT("  BytesPerSector:         %hu\n", BootSector->BPB.BytesPerSector);
 267     DPRINT("  SectorsPerCluster:      %hu\n", BootSector->BPB.SectorsPerCluster);
 268     DPRINT("  SectorCount:            %I64u\n", BootSector->EBPB.SectorCount);
 269     DPRINT("  MftStart:               %I64u\n", BootSector->EBPB.MftLocation);
 270     DPRINT("  MftMirrStart:           %I64u\n", BootSector->EBPB.MftMirrLocation);
 271     DPRINT("  ClustersPerMftRecord:   %lx\n", BootSector->EBPB.ClustersPerMftRecord);
 272     DPRINT("  ClustersPerIndexRecord: %lx\n", BootSector->EBPB.ClustersPerIndexRecord);
 273     DPRINT("  SerialNumber:           %I64x\n", BootSector->EBPB.SerialNumber);
 274
 275     ExFreePool(BootSector);
 276
 277     DeviceExt->MasterFileTable = ExAllocatePoolWithTag(NonPagedPool,
 278                                                        NtfsInfo->BytesPerFileRecord,
 279                                                        TAG_NTFS);
 280     if (DeviceExt->MasterFileTable == NULL)
 281     {
 282         return STATUS_INSUFFICIENT_RESOURCES;
 283     }
 284
 285     Status = NtfsReadSectors(DeviceObject,
 286                              NtfsInfo->MftStart.u.LowPart * NtfsInfo->SectorsPerCluster,
 287                              NtfsInfo->BytesPerFileRecord / NtfsInfo->BytesPerSector,
 288                              NtfsInfo->BytesPerSector,
 289                              (PVOID)DeviceExt->MasterFileTable,
 290                              TRUE);
 291     if (!NT_SUCCESS(Status))
 292     {
 293         DPRINT1("Failed reading MFT.\n");
 294         ExFreePool(DeviceExt->MasterFileTable);
 295         return Status;
 296     }
 297
 298     Status = FindAttribute(DeviceExt, DeviceExt->MasterFileTable, AttributeData, L"", 0, &DeviceExt->MFTContext);
 299     if (!NT_SUCCESS(Status))
 300     {
 301         DPRINT1("Can't find data attribute for Master File Table.\n");
 302         ExFreePool(DeviceExt->MasterFileTable);
 303         return Status;
 304     }
 305
 306     VolumeRecord = ExAllocatePoolWithTag(NonPagedPool,
 307                                          NtfsInfo->BytesPerFileRecord,
 308                                          TAG_NTFS);
 309     if (VolumeRecord == NULL)
 310     {
 311         DPRINT1("Allocation failed for volume record\n");
 312         ExFreePool(DeviceExt->MasterFileTable);
 313         return STATUS_INSUFFICIENT_RESOURCES;
 314     }
 315
 316     /* Read Volume File (MFT index 3) */
 317     DeviceExt->StorageDevice = DeviceObject;
 318     Status = ReadFileRecord(DeviceExt,
 319                             NTFS_FILE_VOLUME,
 320                             VolumeRecord);
 321     if (!NT_SUCCESS(Status))
 322     {
 323         DPRINT1("Failed reading volume file\n");
 324         ExFreePool(VolumeRecord);
 325         ExFreePool(DeviceExt->MasterFileTable);
 326         return Status;
 327     }
 328
 329     /* Enumerate attributes */
 330     NtfsDumpFileAttributes(DeviceExt, DeviceExt->MasterFileTable);
 331
 332     /* Enumerate attributes */
 333     NtfsDumpFileAttributes(DeviceExt, VolumeRecord);
 334
 335     /* Get volume name */
 336     Status = FindAttribute(DeviceExt, VolumeRecord, AttributeVolumeName, L"", 0, &AttrCtxt);
 337
 338     if (NT_SUCCESS(Status) && AttrCtxt->Record.Resident.ValueLength != 0)
 339     {
 340         Attribute = &AttrCtxt->Record;
 341         DPRINT("Data length %lu\n", AttributeDataLength(Attribute));
 342         NtfsInfo->VolumeLabelLength =
 343            min (Attribute->Resident.ValueLength, MAXIMUM_VOLUME_LABEL_LENGTH);
 344         RtlCopyMemory(NtfsInfo->VolumeLabel,
 345                       (PVOID)((ULONG_PTR)Attribute + Attribute->Resident.ValueOffset),
 346                       NtfsInfo->VolumeLabelLength);
 347         VolumeNameU = NtfsInfo->VolumeLabel;
 348     }
 349     else
 350     {
 351         NtfsInfo->VolumeLabelLength = 0;
 352         VolumeNameU = L"\0";
 353     }
 354
 355     VolumeFcb = NtfsCreateFCB(VolumeNameU, NULL, DeviceExt);
 356     if (VolumeFcb == NULL)
 357     {
 358         DPRINT1("Failed allocating volume FCB\n");
 359         ExFreePool(VolumeRecord);
 360         ExFreePool(DeviceExt->MasterFileTable);
 361         return STATUS_INSUFFICIENT_RESOURCES;
 362     }
 363
 364     VolumeFcb->Flags = FCB_IS_VOLUME;
 365     VolumeFcb->RFCB.FileSize.QuadPart = DeviceExt->NtfsInfo.SectorCount * DeviceExt->NtfsInfo.BytesPerSector;
 366     VolumeFcb->RFCB.ValidDataLength = VolumeFcb->RFCB.FileSize;
 367     VolumeFcb->RFCB.AllocationSize = VolumeFcb->RFCB.FileSize;
 368     VolumeFcb->MFTIndex = 0;
 369     DeviceExt->VolumeFcb = VolumeFcb;
 370
 371     /* Get volume information */
 372     Status = FindAttribute(DeviceExt, VolumeRecord, AttributeVolumeInformation, L"", 0, &AttrCtxt);
 373
 374     if (NT_SUCCESS(Status) && AttrCtxt->Record.Resident.ValueLength != 0)
 375     {
 376         Attribute = &AttrCtxt->Record;
 377         DPRINT("Data length %lu\n", AttributeDataLength (Attribute));
 378         VolumeInfo = (PVOID)((ULONG_PTR)Attribute + Attribute->Resident.ValueOffset);
 379
 380         NtfsInfo->MajorVersion = VolumeInfo->MajorVersion;
 381         NtfsInfo->MinorVersion = VolumeInfo->MinorVersion;
 382         NtfsInfo->Flags = VolumeInfo->Flags;
 383     }
 384
 385     ExFreePool(VolumeRecord);
 386
 387     NtfsInfo->MftZoneReservation = NtfsQueryMftZoneReservation();
 388
 389     return Status;
 390 }
 391
 392
 393 static
 394 NTSTATUS
 395 NtfsMountVolume(PDEVICE_OBJECT DeviceObject,
 396                 PIRP Irp)
 397 {
 398     PDEVICE_OBJECT NewDeviceObject = NULL;
 399     PDEVICE_OBJECT DeviceToMount;
 400     PIO_STACK_LOCATION Stack;
 401     PNTFS_FCB Fcb = NULL;
 402     PNTFS_CCB Ccb = NULL;
 403     PNTFS_VCB Vcb = NULL;
 404     NTSTATUS Status;
 405
 406     DPRINT1("NtfsMountVolume() called\n");
 407
 408     if (DeviceObject != NtfsGlobalData->DeviceObject)
 409     {
 410         Status = STATUS_INVALID_DEVICE_REQUEST;
 411         goto ByeBye;
 412     }
 413
 414     Stack = IoGetCurrentIrpStackLocation(Irp);
 415     DeviceToMount = Stack->Parameters.MountVolume.DeviceObject;
 416
 417     Status = NtfsHasFileSystem(DeviceToMount);
 418     if (!NT_SUCCESS(Status))
 419     {
 420         goto ByeBye;
 421     }
 422
 423     Status = IoCreateDevice(NtfsGlobalData->DriverObject,
 424                             sizeof(DEVICE_EXTENSION),
 425                             NULL,
 426                             FILE_DEVICE_DISK_FILE_SYSTEM,
 427                             0,
 428                             FALSE,
 429                             &NewDeviceObject);
 430     if (!NT_SUCCESS(Status))
 431         goto ByeBye;
 432
 433     NewDeviceObject->Flags |= DO_DIRECT_IO;
 434     Vcb = (PVOID)NewDeviceObject->DeviceExtension;
 435     RtlZeroMemory(Vcb, sizeof(NTFS_VCB));
 436
 437     Vcb->Identifier.Type = NTFS_TYPE_VCB;
 438     Vcb->Identifier.Size = sizeof(NTFS_TYPE_VCB);
 439
 440     Status = NtfsGetVolumeData(DeviceToMount,
 441                                Vcb);
 442     if (!NT_SUCCESS(Status))
 443         goto ByeBye;
 444
 445     NewDeviceObject->Vpb = DeviceToMount->Vpb;
 446
 447     Vcb->StorageDevice = DeviceToMount;
 448     Vcb->StorageDevice->Vpb->DeviceObject = NewDeviceObject;
 449     Vcb->StorageDevice->Vpb->RealDevice = Vcb->StorageDevice;
 450     Vcb->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
 451     NewDeviceObject->StackSize = Vcb->StorageDevice->StackSize + 1;
 452     NewDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 453
 454     Vcb->StreamFileObject = IoCreateStreamFileObject(NULL,
 455                                                      Vcb->StorageDevice);
 456
 457     InitializeListHead(&Vcb->FcbListHead);
 458
 459     Fcb = NtfsCreateFCB(NULL, NULL, Vcb);
 460     if (Fcb == NULL)
 461     {
 462         Status = STATUS_INSUFFICIENT_RESOURCES;
 463         goto ByeBye;
 464     }
 465
 466     Ccb = ExAllocatePoolWithTag(NonPagedPool,
 467                                 sizeof(NTFS_CCB),
 468                                 TAG_CCB);
 469     if (Ccb == NULL)
 470     {
 471         Status =  STATUS_INSUFFICIENT_RESOURCES;
 472         goto ByeBye;
 473     }
 474
 475     RtlZeroMemory(Ccb, sizeof(NTFS_CCB));
 476
 477     Ccb->Identifier.Type = NTFS_TYPE_CCB;
 478     Ccb->Identifier.Size = sizeof(NTFS_TYPE_CCB);
 479
 480     Vcb->StreamFileObject->FsContext = Fcb;
 481     Vcb->StreamFileObject->FsContext2 = Ccb;
 482     Vcb->StreamFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
 483     Vcb->StreamFileObject->PrivateCacheMap = NULL;
 484     Vcb->StreamFileObject->Vpb = Vcb->Vpb;
 485     Ccb->PtrFileObject = Vcb->StreamFileObject;
 486     Fcb->FileObject = Vcb->StreamFileObject;
 487     Fcb->Vcb = (PDEVICE_EXTENSION)Vcb->StorageDevice;
 488
 489     Fcb->Flags = FCB_IS_VOLUME_STREAM;
 490
 491     Fcb->RFCB.FileSize.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector;
 492     Fcb->RFCB.ValidDataLength.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector;
 493     Fcb->RFCB.AllocationSize.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector; /* Correct? */
 494
 495 //    Fcb->Entry.ExtentLocationL = 0;
 496 //    Fcb->Entry.DataLengthL = DeviceExt->CdInfo.VolumeSpaceSize * BLOCKSIZE;
 497
 498     _SEH2_TRY
 499     {
 500         CcInitializeCacheMap(Vcb->StreamFileObject,
 501                              (PCC_FILE_SIZES)(&Fcb->RFCB.AllocationSize),
 502                              TRUE,
 503                              &(NtfsGlobalData->CacheMgrCallbacks),
 504                              Fcb);
 505     }
 506     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 507     {
 508         Status = _SEH2_GetExceptionCode();
 509         goto ByeBye;
 510     }
 511     _SEH2_END;
 512
 513     ExInitializeResourceLite(&Vcb->DirResource);
 514
 515     KeInitializeSpinLock(&Vcb->FcbListLock);
 516
 517     /* Get serial number */
 518     NewDeviceObject->Vpb->SerialNumber = Vcb->NtfsInfo.SerialNumber;
 519
 520     /* Get volume label */
 521     NewDeviceObject->Vpb->VolumeLabelLength = Vcb->NtfsInfo.VolumeLabelLength;
 522     RtlCopyMemory(NewDeviceObject->Vpb->VolumeLabel,
 523                   Vcb->NtfsInfo.VolumeLabel,
 524                   Vcb->NtfsInfo.VolumeLabelLength);
 525
 526     FsRtlNotifyVolumeEvent(Vcb->StreamFileObject, FSRTL_VOLUME_MOUNT);
 527
 528     Status = STATUS_SUCCESS;
 529
 530 ByeBye:
 531     if (!NT_SUCCESS(Status))
 532     {
 533         /* Cleanup */
 534         if (Vcb && Vcb->StreamFileObject)
 535             ObDereferenceObject(Vcb->StreamFileObject);
 536
 537         if (Fcb)
 538             NtfsDestroyFCB(Fcb);
 539
 540         if (Ccb)
 541             ExFreePool(Ccb);
 542
 543         if (NewDeviceObject)
 544             IoDeleteDevice(NewDeviceObject);
 545     }
 546
 547     DPRINT("NtfsMountVolume() done (Status: %lx)\n", Status);
 548
 549     return Status;
 550 }
 551
 552
 553 static
 554 NTSTATUS
 555 NtfsVerifyVolume(PDEVICE_OBJECT DeviceObject,
 556                  PIRP Irp)
 557 {
 558     UNREFERENCED_PARAMETER(DeviceObject);
 559     UNREFERENCED_PARAMETER(Irp);
 560     DPRINT1("NtfsVerifyVolume() called\n");
 561     return STATUS_WRONG_VOLUME;
 562 }
 563
 564
 565 static
 566 NTSTATUS
 567 GetNfsVolumeData(PDEVICE_EXTENSION DeviceExt,
 568                  PIRP Irp)
 569 {
 570     PIO_STACK_LOCATION Stack;
 571     PNTFS_VOLUME_DATA_BUFFER DataBuffer;
 572     PNTFS_ATTR_RECORD Attribute;
 573
 574     DataBuffer = (PNTFS_VOLUME_DATA_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 575     Stack = IoGetCurrentIrpStackLocation(Irp);
 576
 577     if (Stack->Parameters.FileSystemControl.OutputBufferLength < sizeof(NTFS_VOLUME_DATA_BUFFER) ||
 578         Irp->UserBuffer == NULL)
 579     {
 580         DPRINT1("Invalid output! %d %p\n", Stack->Parameters.FileSystemControl.OutputBufferLength, Irp->UserBuffer);
 581         return STATUS_INVALID_PARAMETER;
 582     }
 583
 584     DataBuffer->VolumeSerialNumber.QuadPart = DeviceExt->NtfsInfo.SerialNumber;
 585     DataBuffer->NumberSectors.QuadPart = DeviceExt->NtfsInfo.SectorCount;
 586     DataBuffer->TotalClusters.QuadPart = DeviceExt->NtfsInfo.ClusterCount;
 587     DataBuffer->FreeClusters.QuadPart = NtfsGetFreeClusters(DeviceExt);
 588     DataBuffer->TotalReserved.QuadPart = 0LL; // FIXME
 589     DataBuffer->BytesPerSector = DeviceExt->NtfsInfo.BytesPerSector;
 590     DataBuffer->BytesPerCluster = DeviceExt->NtfsInfo.BytesPerCluster;
 591     DataBuffer->BytesPerFileRecordSegment = DeviceExt->NtfsInfo.BytesPerFileRecord;
 592     DataBuffer->ClustersPerFileRecordSegment = DeviceExt->NtfsInfo.BytesPerFileRecord / DeviceExt->NtfsInfo.BytesPerCluster;
 593     DataBuffer->MftStartLcn.QuadPart = DeviceExt->NtfsInfo.MftStart.QuadPart;
 594     DataBuffer->Mft2StartLcn.QuadPart = DeviceExt->NtfsInfo.MftMirrStart.QuadPart;
 595     DataBuffer->MftZoneStart.QuadPart = 0; // FIXME
 596     DataBuffer->MftZoneEnd.QuadPart = 0; // FIXME
 597
 598     Attribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)DeviceExt->MasterFileTable + DeviceExt->MasterFileTable->AttributeOffset);
 599     while (Attribute < (PNTFS_ATTR_RECORD)((ULONG_PTR)DeviceExt->MasterFileTable + DeviceExt->MasterFileTable->BytesInUse) &&
 600            Attribute->Type != AttributeEnd)
 601     {
 602         if (Attribute->Type == AttributeData)
 603         {
 604             ASSERT(Attribute->IsNonResident);
 605             DataBuffer->MftValidDataLength.QuadPart = Attribute->NonResident.DataSize;
 606
 607             break;
 608         }
 609
 610         Attribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)Attribute + Attribute->Length);
 611     }
 612
 613     Irp->IoStatus.Information = sizeof(NTFS_VOLUME_DATA_BUFFER);
 614
 615     if (Stack->Parameters.FileSystemControl.OutputBufferLength >= sizeof(NTFS_EXTENDED_VOLUME_DATA) + sizeof(NTFS_VOLUME_DATA_BUFFER))
 616     {
 617         PNTFS_EXTENDED_VOLUME_DATA ExtendedData = (PNTFS_EXTENDED_VOLUME_DATA)((ULONG_PTR)Irp->UserBuffer + sizeof(NTFS_VOLUME_DATA_BUFFER));
 618
 619         ExtendedData->ByteCount = sizeof(NTFS_EXTENDED_VOLUME_DATA);
 620         ExtendedData->MajorVersion = DeviceExt->NtfsInfo.MajorVersion;
 621         ExtendedData->MinorVersion = DeviceExt->NtfsInfo.MinorVersion;
 622         Irp->IoStatus.Information += sizeof(NTFS_EXTENDED_VOLUME_DATA);
 623     }
 624
 625     return STATUS_SUCCESS;
 626 }
 627
 628
 629 static
 630 NTSTATUS
 631 GetNtfsFileRecord(PDEVICE_EXTENSION DeviceExt,
 632                   PIRP Irp)
 633 {
 634     NTSTATUS Status;
 635     PIO_STACK_LOCATION Stack;
 636     PNTFS_FILE_RECORD_INPUT_BUFFER InputBuffer;
 637     PFILE_RECORD_HEADER FileRecord;
 638     PNTFS_FILE_RECORD_OUTPUT_BUFFER OutputBuffer;
 639     ULONGLONG MFTRecord;
 640
 641     Stack = IoGetCurrentIrpStackLocation(Irp);
 642
 643     if (Stack->Parameters.FileSystemControl.InputBufferLength < sizeof(NTFS_FILE_RECORD_INPUT_BUFFER) ||
 644         Irp->AssociatedIrp.SystemBuffer == NULL)
 645     {
 646         DPRINT1("Invalid input! %d %p\n", Stack->Parameters.FileSystemControl.InputBufferLength, Irp->AssociatedIrp.SystemBuffer);
 647         return STATUS_INVALID_PARAMETER;
 648     }
 649
 650     if (Stack->Parameters.FileSystemControl.OutputBufferLength < (FIELD_OFFSET(NTFS_FILE_RECORD_OUTPUT_BUFFER, FileRecordBuffer) + DeviceExt->NtfsInfo.BytesPerFileRecord) ||
 651         Irp->AssociatedIrp.SystemBuffer == NULL)
 652     {
 653         DPRINT1("Invalid output! %d %p\n", Stack->Parameters.FileSystemControl.OutputBufferLength, Irp->AssociatedIrp.SystemBuffer);
 654         return STATUS_BUFFER_TOO_SMALL;
 655     }
 656
 657     FileRecord = ExAllocatePoolWithTag(NonPagedPool,
 658                                        DeviceExt->NtfsInfo.BytesPerFileRecord,
 659                                        TAG_NTFS);
 660     if (FileRecord == NULL)
 661     {
 662         return STATUS_INSUFFICIENT_RESOURCES;
 663     }
 664
 665     InputBuffer = (PNTFS_FILE_RECORD_INPUT_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 666
 667     MFTRecord = InputBuffer->FileReferenceNumber.QuadPart;
 668     DPRINT1("Requesting: %I64x\n", MFTRecord);
 669
 670     do
 671     {
 672         Status = ReadFileRecord(DeviceExt, MFTRecord, FileRecord);
 673         if (NT_SUCCESS(Status))
 674         {
 675             if (FileRecord->Flags & FRH_IN_USE)
 676             {
 677                 break;
 678             }
 679         }
 680
 681         --MFTRecord;
 682     } while (TRUE);
 683
 684     DPRINT1("Returning: %I64x\n", MFTRecord);
 685     OutputBuffer = (PNTFS_FILE_RECORD_OUTPUT_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 686     OutputBuffer->FileReferenceNumber.QuadPart = MFTRecord;
 687     OutputBuffer->FileRecordLength = DeviceExt->NtfsInfo.BytesPerFileRecord;
 688     RtlCopyMemory(OutputBuffer->FileRecordBuffer, FileRecord, DeviceExt->NtfsInfo.BytesPerFileRecord);
 689
 690     ExFreePoolWithTag(FileRecord, TAG_NTFS);
 691
 692     Irp->IoStatus.Information = FIELD_OFFSET(NTFS_FILE_RECORD_OUTPUT_BUFFER, FileRecordBuffer) + DeviceExt->NtfsInfo.BytesPerFileRecord;
 693
 694     return STATUS_SUCCESS;
 695 }
 696
 697
 698 static
 699 NTSTATUS
 700 GetVolumeBitmap(PDEVICE_EXTENSION DeviceExt,
 701                 PIRP Irp)
 702 {
 703     NTSTATUS Status = STATUS_SUCCESS;
 704     PIO_STACK_LOCATION Stack;
 705     PVOLUME_BITMAP_BUFFER BitmapBuffer;
 706     LONGLONG StartingLcn;
 707     PFILE_RECORD_HEADER BitmapRecord;
 708     PNTFS_ATTR_CONTEXT DataContext;
 709     ULONGLONG TotalClusters;
 710     ULONGLONG ToCopy;
 711     BOOLEAN Overflow = FALSE;
 712
 713     DPRINT1("GetVolumeBitmap(%p, %p)\n", DeviceExt, Irp);
 714
 715     Stack = IoGetCurrentIrpStackLocation(Irp);
 716
 717     if (Stack->Parameters.FileSystemControl.InputBufferLength < sizeof(STARTING_LCN_INPUT_BUFFER))
 718     {
 719         DPRINT1("Invalid input! %d\n", Stack->Parameters.FileSystemControl.InputBufferLength);
 720         return STATUS_INVALID_PARAMETER;
 721     }
 722
 723     if (Stack->Parameters.FileSystemControl.OutputBufferLength < sizeof(VOLUME_BITMAP_BUFFER))
 724     {
 725         DPRINT1("Invalid output! %d\n", Stack->Parameters.FileSystemControl.OutputBufferLength);
 726         return STATUS_BUFFER_TOO_SMALL;
 727     }
 728
 729     BitmapBuffer = NtfsGetUserBuffer(Irp, FALSE);
 730     if (Irp->RequestorMode == UserMode)
 731     {
 732         _SEH2_TRY
 733         {
 734             ProbeForRead(Stack->Parameters.FileSystemControl.Type3InputBuffer,
 735                          Stack->Parameters.FileSystemControl.InputBufferLength,
 736                          sizeof(CHAR));
 737             ProbeForWrite(BitmapBuffer, Stack->Parameters.FileSystemControl.OutputBufferLength,
 738                           sizeof(CHAR));
 739         }
 740         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 741         {
 742             Status = _SEH2_GetExceptionCode();
 743         }
 744         _SEH2_END;
 745     }
 746     else
 747     {
 748         if (Stack->Parameters.FileSystemControl.Type3InputBuffer == NULL ||
 749             BitmapBuffer == NULL)
 750         {
 751             Status = STATUS_INVALID_PARAMETER;
 752         }
 753     }
 754
 755     if (!NT_SUCCESS(Status))
 756     {
 757         DPRINT1("Invalid buffer! %p %p\n", Stack->Parameters.FileSystemControl.Type3InputBuffer, BitmapBuffer);
 758         return Status;
 759     }
 760
 761     StartingLcn = ((PSTARTING_LCN_INPUT_BUFFER)Stack->Parameters.FileSystemControl.Type3InputBuffer)->StartingLcn.QuadPart;
 762     if (StartingLcn > DeviceExt->NtfsInfo.ClusterCount)
 763     {
 764         DPRINT1("Requested bitmap start beyond partition end: %I64x %I64x\n", DeviceExt->NtfsInfo.ClusterCount, StartingLcn);
 765         return STATUS_INVALID_PARAMETER;
 766     }
 767
 768     /* Round down to a multiple of 8 */
 769     StartingLcn = StartingLcn & ~7;
 770     TotalClusters = DeviceExt->NtfsInfo.ClusterCount - StartingLcn;
 771     ToCopy = TotalClusters / 8;
 772     if ((ToCopy + FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer)) > Stack->Parameters.FileSystemControl.OutputBufferLength)
 773     {
 774         DPRINT1("Buffer too small: %x, needed: %x\n", Stack->Parameters.FileSystemControl.OutputBufferLength, (ToCopy + FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer)));
 775         Overflow = TRUE;
 776         ToCopy = Stack->Parameters.FileSystemControl.OutputBufferLength - FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer);
 777     }
 778
 779     BitmapRecord = ExAllocatePoolWithTag(NonPagedPool,
 780                                          DeviceExt->NtfsInfo.BytesPerFileRecord,
 781                                          TAG_NTFS);
 782     if (BitmapRecord == NULL)
 783     {
 784         return STATUS_INSUFFICIENT_RESOURCES;
 785     }
 786
 787     Status = ReadFileRecord(DeviceExt, NTFS_FILE_BITMAP, BitmapRecord);
 788     if (!NT_SUCCESS(Status))
 789     {
 790         DPRINT1("Failed reading volume bitmap: %lx\n", Status);
 791         ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 792         return Status;
 793     }
 794
 795     Status = FindAttribute(DeviceExt, BitmapRecord, AttributeData, L"", 0, &DataContext);
 796     if (!NT_SUCCESS(Status))
 797     {
 798         DPRINT1("Failed find $DATA for bitmap: %lx\n", Status);
 799         ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 800         return Status;
 801     }
 802
 803     BitmapBuffer->StartingLcn.QuadPart = StartingLcn;
 804     BitmapBuffer->BitmapSize.QuadPart = ToCopy * 8;
 805
 806     Irp->IoStatus.Information = FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer);
 807     _SEH2_TRY
 808     {
 809         Irp->IoStatus.Information += ReadAttribute(DeviceExt, DataContext, StartingLcn / 8, (PCHAR)BitmapBuffer->Buffer, ToCopy);
 810         Status = (Overflow ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS);
 811     }
 812     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 813     {
 814         Status = _SEH2_GetExceptionCode();
 815     }
 816     _SEH2_END;
 817     ReleaseAttributeContext(DataContext);
 818     ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 819
 820     return STATUS_SUCCESS;
 821 }
 822
 823
 824 static
 825 NTSTATUS
 826 NtfsUserFsRequest(PDEVICE_OBJECT DeviceObject,
 827                   PIRP Irp)
 828 {
 829     NTSTATUS Status;
 830     PIO_STACK_LOCATION Stack;
 831     PDEVICE_EXTENSION DeviceExt;
 832
 833     DPRINT1("NtfsUserFsRequest(%p, %p)\n", DeviceObject, Irp);
 834
 835     Stack = IoGetCurrentIrpStackLocation(Irp);
 836     DeviceExt = DeviceObject->DeviceExtension;
 837     switch (Stack->Parameters.FileSystemControl.FsControlCode)
 838     {
 839         case FSCTL_CREATE_USN_JOURNAL:
 840         case FSCTL_DELETE_USN_JOURNAL:
 841         case FSCTL_ENUM_USN_DATA:
 842         case FSCTL_EXTEND_VOLUME:
 843         //case FSCTL_GET_RETRIEVAL_POINTER_BASE:
 844         case FSCTL_GET_RETRIEVAL_POINTERS:
 845         case FSCTL_LOCK_VOLUME:
 846         //case FSCTL_LOOKUP_STREAM_FROM_CLUSTER:
 847         case FSCTL_MARK_HANDLE:
 848         case FSCTL_MOVE_FILE:
 849         case FSCTL_QUERY_USN_JOURNAL:
 850         case FSCTL_READ_FILE_USN_DATA:
 851         case FSCTL_READ_USN_JOURNAL:
 852         //case FSCTL_SHRINK_VOLUME:
 853         case FSCTL_UNLOCK_VOLUME:
 854         case FSCTL_WRITE_USN_CLOSE_RECORD:
 855             UNIMPLEMENTED;
 856             DPRINT1("Unimplemented user request: %x\n", Stack->Parameters.FileSystemControl.FsControlCode);
 857             Status = STATUS_NOT_IMPLEMENTED;
 858             break;
 859
 860         case FSCTL_GET_NTFS_VOLUME_DATA:
 861             Status = GetNfsVolumeData(DeviceExt, Irp);
 862             break;
 863
 864         case FSCTL_GET_NTFS_FILE_RECORD:
 865             Status = GetNtfsFileRecord(DeviceExt, Irp);
 866             break;
 867
 868         case FSCTL_GET_VOLUME_BITMAP:
 869             Status = GetVolumeBitmap(DeviceExt, Irp);
 870             break;
 871
 872         default:
 873             DPRINT("Invalid user request: %x\n", Stack->Parameters.FileSystemControl.FsControlCode);
 874             Status = STATUS_INVALID_DEVICE_REQUEST;
 875             break;
 876     }
 877
 878     return Status;
 879 }
 880
 881
 882 NTSTATUS
 883 NtfsFileSystemControl(PNTFS_IRP_CONTEXT IrpContext)
 884 {
 885     NTSTATUS Status;
 886     PIRP Irp;
 887     PDEVICE_OBJECT DeviceObject;
 888
 889     DPRINT1("NtfsFileSystemControl() called\n");
 890
 891     DeviceObject = IrpContext->DeviceObject;
 892     Irp = IrpContext->Irp;
 893     Irp->IoStatus.Information = 0;
 894
 895     switch (IrpContext->MinorFunction)
 896     {
 897         case IRP_MN_KERNEL_CALL:
 898             DPRINT1("NTFS: IRP_MN_USER_FS_REQUEST\n");
 899             Status = STATUS_INVALID_DEVICE_REQUEST;
 900             break;
 901
 902         case IRP_MN_USER_FS_REQUEST:
 903             Status = NtfsUserFsRequest(DeviceObject, Irp);
 904             break;
 905
 906         case IRP_MN_MOUNT_VOLUME:
 907             DPRINT("NTFS: IRP_MN_MOUNT_VOLUME\n");
 908             Status = NtfsMountVolume(DeviceObject, Irp);
 909             break;
 910
 911         case IRP_MN_VERIFY_VOLUME:
 912             DPRINT1("NTFS: IRP_MN_VERIFY_VOLUME\n");
 913             Status = NtfsVerifyVolume(DeviceObject, Irp);
 914             break;
 915
 916         default:
 917             DPRINT1("NTFS FSC: MinorFunction %d\n", IrpContext->MinorFunction);
 918             Status = STATUS_INVALID_DEVICE_REQUEST;
 919             break;
 920     }
 921
 922     return Status;
 923 }
 924
 925 /* EOF */