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     if (NT_SUCCESS(Status))
 356     {
 357         ReleaseAttributeContext(AttrCtxt);
 358     }
 359
 360     VolumeFcb = NtfsCreateFCB(VolumeNameU, NULL, DeviceExt);
 361     if (VolumeFcb == NULL)
 362     {
 363         DPRINT1("Failed allocating volume FCB\n");
 364         ExFreePool(VolumeRecord);
 365         ExFreePool(DeviceExt->MasterFileTable);
 366         return STATUS_INSUFFICIENT_RESOURCES;
 367     }
 368
 369     VolumeFcb->Flags = FCB_IS_VOLUME;
 370     VolumeFcb->RFCB.FileSize.QuadPart = DeviceExt->NtfsInfo.SectorCount * DeviceExt->NtfsInfo.BytesPerSector;
 371     VolumeFcb->RFCB.ValidDataLength = VolumeFcb->RFCB.FileSize;
 372     VolumeFcb->RFCB.AllocationSize = VolumeFcb->RFCB.FileSize;
 373     VolumeFcb->MFTIndex = 0;
 374     DeviceExt->VolumeFcb = VolumeFcb;
 375
 376     /* Get volume information */
 377     Status = FindAttribute(DeviceExt, VolumeRecord, AttributeVolumeInformation, L"", 0, &AttrCtxt);
 378
 379     if (NT_SUCCESS(Status) && AttrCtxt->Record.Resident.ValueLength != 0)
 380     {
 381         Attribute = &AttrCtxt->Record;
 382         DPRINT("Data length %lu\n", AttributeDataLength (Attribute));
 383         VolumeInfo = (PVOID)((ULONG_PTR)Attribute + Attribute->Resident.ValueOffset);
 384
 385         NtfsInfo->MajorVersion = VolumeInfo->MajorVersion;
 386         NtfsInfo->MinorVersion = VolumeInfo->MinorVersion;
 387         NtfsInfo->Flags = VolumeInfo->Flags;
 388     }
 389
 390     if (NT_SUCCESS(Status))
 391     {
 392         ReleaseAttributeContext(AttrCtxt);
 393     }
 394
 395     ExFreePool(VolumeRecord);
 396
 397     NtfsInfo->MftZoneReservation = NtfsQueryMftZoneReservation();
 398
 399     return Status;
 400 }
 401
 402
 403 static
 404 NTSTATUS
 405 NtfsMountVolume(PDEVICE_OBJECT DeviceObject,
 406                 PIRP Irp)
 407 {
 408     PDEVICE_OBJECT NewDeviceObject = NULL;
 409     PDEVICE_OBJECT DeviceToMount;
 410     PIO_STACK_LOCATION Stack;
 411     PNTFS_FCB Fcb = NULL;
 412     PNTFS_CCB Ccb = NULL;
 413     PNTFS_VCB Vcb = NULL;
 414     NTSTATUS Status;
 415
 416     DPRINT1("NtfsMountVolume() called\n");
 417
 418     if (DeviceObject != NtfsGlobalData->DeviceObject)
 419     {
 420         Status = STATUS_INVALID_DEVICE_REQUEST;
 421         goto ByeBye;
 422     }
 423
 424     Stack = IoGetCurrentIrpStackLocation(Irp);
 425     DeviceToMount = Stack->Parameters.MountVolume.DeviceObject;
 426
 427     Status = NtfsHasFileSystem(DeviceToMount);
 428     if (!NT_SUCCESS(Status))
 429     {
 430         goto ByeBye;
 431     }
 432
 433     Status = IoCreateDevice(NtfsGlobalData->DriverObject,
 434                             sizeof(DEVICE_EXTENSION),
 435                             NULL,
 436                             FILE_DEVICE_DISK_FILE_SYSTEM,
 437                             0,
 438                             FALSE,
 439                             &NewDeviceObject);
 440     if (!NT_SUCCESS(Status))
 441         goto ByeBye;
 442
 443     NewDeviceObject->Flags |= DO_DIRECT_IO;
 444     Vcb = (PVOID)NewDeviceObject->DeviceExtension;
 445     RtlZeroMemory(Vcb, sizeof(NTFS_VCB));
 446
 447     Vcb->Identifier.Type = NTFS_TYPE_VCB;
 448     Vcb->Identifier.Size = sizeof(NTFS_TYPE_VCB);
 449
 450     Status = NtfsGetVolumeData(DeviceToMount,
 451                                Vcb);
 452     if (!NT_SUCCESS(Status))
 453         goto ByeBye;
 454
 455     NewDeviceObject->Vpb = DeviceToMount->Vpb;
 456
 457     Vcb->StorageDevice = DeviceToMount;
 458     Vcb->StorageDevice->Vpb->DeviceObject = NewDeviceObject;
 459     Vcb->StorageDevice->Vpb->RealDevice = Vcb->StorageDevice;
 460     Vcb->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
 461     NewDeviceObject->StackSize = Vcb->StorageDevice->StackSize + 1;
 462     NewDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 463
 464     Vcb->StreamFileObject = IoCreateStreamFileObject(NULL,
 465                                                      Vcb->StorageDevice);
 466
 467     InitializeListHead(&Vcb->FcbListHead);
 468
 469     Fcb = NtfsCreateFCB(NULL, NULL, Vcb);
 470     if (Fcb == NULL)
 471     {
 472         Status = STATUS_INSUFFICIENT_RESOURCES;
 473         goto ByeBye;
 474     }
 475
 476     Ccb = ExAllocatePoolWithTag(NonPagedPool,
 477                                 sizeof(NTFS_CCB),
 478                                 TAG_CCB);
 479     if (Ccb == NULL)
 480     {
 481         Status =  STATUS_INSUFFICIENT_RESOURCES;
 482         goto ByeBye;
 483     }
 484
 485     RtlZeroMemory(Ccb, sizeof(NTFS_CCB));
 486
 487     Ccb->Identifier.Type = NTFS_TYPE_CCB;
 488     Ccb->Identifier.Size = sizeof(NTFS_TYPE_CCB);
 489
 490     Vcb->StreamFileObject->FsContext = Fcb;
 491     Vcb->StreamFileObject->FsContext2 = Ccb;
 492     Vcb->StreamFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
 493     Vcb->StreamFileObject->PrivateCacheMap = NULL;
 494     Vcb->StreamFileObject->Vpb = Vcb->Vpb;
 495     Ccb->PtrFileObject = Vcb->StreamFileObject;
 496     Fcb->FileObject = Vcb->StreamFileObject;
 497     Fcb->Vcb = (PDEVICE_EXTENSION)Vcb->StorageDevice;
 498
 499     Fcb->Flags = FCB_IS_VOLUME_STREAM;
 500
 501     Fcb->RFCB.FileSize.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector;
 502     Fcb->RFCB.ValidDataLength.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector;
 503     Fcb->RFCB.AllocationSize.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector; /* Correct? */
 504
 505 //    Fcb->Entry.ExtentLocationL = 0;
 506 //    Fcb->Entry.DataLengthL = DeviceExt->CdInfo.VolumeSpaceSize * BLOCKSIZE;
 507
 508     _SEH2_TRY
 509     {
 510         CcInitializeCacheMap(Vcb->StreamFileObject,
 511                              (PCC_FILE_SIZES)(&Fcb->RFCB.AllocationSize),
 512                              TRUE,
 513                              &(NtfsGlobalData->CacheMgrCallbacks),
 514                              Fcb);
 515     }
 516     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 517     {
 518         Status = _SEH2_GetExceptionCode();
 519         goto ByeBye;
 520     }
 521     _SEH2_END;
 522
 523     ExInitializeResourceLite(&Vcb->DirResource);
 524
 525     KeInitializeSpinLock(&Vcb->FcbListLock);
 526
 527     /* Get serial number */
 528     NewDeviceObject->Vpb->SerialNumber = Vcb->NtfsInfo.SerialNumber;
 529
 530     /* Get volume label */
 531     NewDeviceObject->Vpb->VolumeLabelLength = Vcb->NtfsInfo.VolumeLabelLength;
 532     RtlCopyMemory(NewDeviceObject->Vpb->VolumeLabel,
 533                   Vcb->NtfsInfo.VolumeLabel,
 534                   Vcb->NtfsInfo.VolumeLabelLength);
 535
 536     FsRtlNotifyVolumeEvent(Vcb->StreamFileObject, FSRTL_VOLUME_MOUNT);
 537
 538     Status = STATUS_SUCCESS;
 539
 540 ByeBye:
 541     if (!NT_SUCCESS(Status))
 542     {
 543         /* Cleanup */
 544         if (Vcb && Vcb->StreamFileObject)
 545             ObDereferenceObject(Vcb->StreamFileObject);
 546
 547         if (Fcb)
 548             NtfsDestroyFCB(Fcb);
 549
 550         if (Ccb)
 551             ExFreePool(Ccb);
 552
 553         if (NewDeviceObject)
 554             IoDeleteDevice(NewDeviceObject);
 555     }
 556
 557     DPRINT("NtfsMountVolume() done (Status: %lx)\n", Status);
 558
 559     return Status;
 560 }
 561
 562
 563 static
 564 NTSTATUS
 565 NtfsVerifyVolume(PDEVICE_OBJECT DeviceObject,
 566                  PIRP Irp)
 567 {
 568     UNREFERENCED_PARAMETER(DeviceObject);
 569     UNREFERENCED_PARAMETER(Irp);
 570     DPRINT1("NtfsVerifyVolume() called\n");
 571     return STATUS_WRONG_VOLUME;
 572 }
 573
 574
 575 static
 576 NTSTATUS
 577 GetNfsVolumeData(PDEVICE_EXTENSION DeviceExt,
 578                  PIRP Irp)
 579 {
 580     PIO_STACK_LOCATION Stack;
 581     PNTFS_VOLUME_DATA_BUFFER DataBuffer;
 582     PNTFS_ATTR_RECORD Attribute;
 583     FIND_ATTR_CONTXT Context;
 584     NTSTATUS Status;
 585
 586     DataBuffer = (PNTFS_VOLUME_DATA_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 587     Stack = IoGetCurrentIrpStackLocation(Irp);
 588
 589     if (Stack->Parameters.FileSystemControl.OutputBufferLength < sizeof(NTFS_VOLUME_DATA_BUFFER) ||
 590         Irp->UserBuffer == NULL)
 591     {
 592         DPRINT1("Invalid output! %d %p\n", Stack->Parameters.FileSystemControl.OutputBufferLength, Irp->UserBuffer);
 593         return STATUS_INVALID_PARAMETER;
 594     }
 595
 596     DataBuffer->VolumeSerialNumber.QuadPart = DeviceExt->NtfsInfo.SerialNumber;
 597     DataBuffer->NumberSectors.QuadPart = DeviceExt->NtfsInfo.SectorCount;
 598     DataBuffer->TotalClusters.QuadPart = DeviceExt->NtfsInfo.ClusterCount;
 599     DataBuffer->FreeClusters.QuadPart = NtfsGetFreeClusters(DeviceExt);
 600     DataBuffer->TotalReserved.QuadPart = 0LL; // FIXME
 601     DataBuffer->BytesPerSector = DeviceExt->NtfsInfo.BytesPerSector;
 602     DataBuffer->BytesPerCluster = DeviceExt->NtfsInfo.BytesPerCluster;
 603     DataBuffer->BytesPerFileRecordSegment = DeviceExt->NtfsInfo.BytesPerFileRecord;
 604     DataBuffer->ClustersPerFileRecordSegment = DeviceExt->NtfsInfo.BytesPerFileRecord / DeviceExt->NtfsInfo.BytesPerCluster;
 605     DataBuffer->MftStartLcn.QuadPart = DeviceExt->NtfsInfo.MftStart.QuadPart;
 606     DataBuffer->Mft2StartLcn.QuadPart = DeviceExt->NtfsInfo.MftMirrStart.QuadPart;
 607     DataBuffer->MftZoneStart.QuadPart = 0; // FIXME
 608     DataBuffer->MftZoneEnd.QuadPart = 0; // FIXME
 609
 610     Status = FindFirstAttribute(&Context, DeviceExt, DeviceExt->MasterFileTable, FALSE, &Attribute);
 611     while (NT_SUCCESS(Status))
 612     {
 613         if (Attribute->Type == AttributeData)
 614         {
 615             ASSERT(Attribute->IsNonResident);
 616             DataBuffer->MftValidDataLength.QuadPart = Attribute->NonResident.DataSize;
 617
 618             break;
 619         }
 620
 621         Status = FindNextAttribute(&Context, &Attribute);
 622     }
 623     FindCloseAttribute(&Context);
 624
 625     Irp->IoStatus.Information = sizeof(NTFS_VOLUME_DATA_BUFFER);
 626
 627     if (Stack->Parameters.FileSystemControl.OutputBufferLength >= sizeof(NTFS_EXTENDED_VOLUME_DATA) + sizeof(NTFS_VOLUME_DATA_BUFFER))
 628     {
 629         PNTFS_EXTENDED_VOLUME_DATA ExtendedData = (PNTFS_EXTENDED_VOLUME_DATA)((ULONG_PTR)Irp->UserBuffer + sizeof(NTFS_VOLUME_DATA_BUFFER));
 630
 631         ExtendedData->ByteCount = sizeof(NTFS_EXTENDED_VOLUME_DATA);
 632         ExtendedData->MajorVersion = DeviceExt->NtfsInfo.MajorVersion;
 633         ExtendedData->MinorVersion = DeviceExt->NtfsInfo.MinorVersion;
 634         Irp->IoStatus.Information += sizeof(NTFS_EXTENDED_VOLUME_DATA);
 635     }
 636
 637     return STATUS_SUCCESS;
 638 }
 639
 640
 641 static
 642 NTSTATUS
 643 GetNtfsFileRecord(PDEVICE_EXTENSION DeviceExt,
 644                   PIRP Irp)
 645 {
 646     NTSTATUS Status;
 647     PIO_STACK_LOCATION Stack;
 648     PNTFS_FILE_RECORD_INPUT_BUFFER InputBuffer;
 649     PFILE_RECORD_HEADER FileRecord;
 650     PNTFS_FILE_RECORD_OUTPUT_BUFFER OutputBuffer;
 651     ULONGLONG MFTRecord;
 652
 653     Stack = IoGetCurrentIrpStackLocation(Irp);
 654
 655     if (Stack->Parameters.FileSystemControl.InputBufferLength < sizeof(NTFS_FILE_RECORD_INPUT_BUFFER) ||
 656         Irp->AssociatedIrp.SystemBuffer == NULL)
 657     {
 658         DPRINT1("Invalid input! %d %p\n", Stack->Parameters.FileSystemControl.InputBufferLength, Irp->AssociatedIrp.SystemBuffer);
 659         return STATUS_INVALID_PARAMETER;
 660     }
 661
 662     if (Stack->Parameters.FileSystemControl.OutputBufferLength < (FIELD_OFFSET(NTFS_FILE_RECORD_OUTPUT_BUFFER, FileRecordBuffer) + DeviceExt->NtfsInfo.BytesPerFileRecord) ||
 663         Irp->AssociatedIrp.SystemBuffer == NULL)
 664     {
 665         DPRINT1("Invalid output! %d %p\n", Stack->Parameters.FileSystemControl.OutputBufferLength, Irp->AssociatedIrp.SystemBuffer);
 666         return STATUS_BUFFER_TOO_SMALL;
 667     }
 668
 669     FileRecord = ExAllocatePoolWithTag(NonPagedPool,
 670                                        DeviceExt->NtfsInfo.BytesPerFileRecord,
 671                                        TAG_NTFS);
 672     if (FileRecord == NULL)
 673     {
 674         return STATUS_INSUFFICIENT_RESOURCES;
 675     }
 676
 677     InputBuffer = (PNTFS_FILE_RECORD_INPUT_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 678
 679     MFTRecord = InputBuffer->FileReferenceNumber.QuadPart;
 680     DPRINT1("Requesting: %I64x\n", MFTRecord);
 681
 682     do
 683     {
 684         Status = ReadFileRecord(DeviceExt, MFTRecord, FileRecord);
 685         if (NT_SUCCESS(Status))
 686         {
 687             if (FileRecord->Flags & FRH_IN_USE)
 688             {
 689                 break;
 690             }
 691         }
 692
 693         --MFTRecord;
 694     } while (TRUE);
 695
 696     DPRINT1("Returning: %I64x\n", MFTRecord);
 697     OutputBuffer = (PNTFS_FILE_RECORD_OUTPUT_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 698     OutputBuffer->FileReferenceNumber.QuadPart = MFTRecord;
 699     OutputBuffer->FileRecordLength = DeviceExt->NtfsInfo.BytesPerFileRecord;
 700     RtlCopyMemory(OutputBuffer->FileRecordBuffer, FileRecord, DeviceExt->NtfsInfo.BytesPerFileRecord);
 701
 702     ExFreePoolWithTag(FileRecord, TAG_NTFS);
 703
 704     Irp->IoStatus.Information = FIELD_OFFSET(NTFS_FILE_RECORD_OUTPUT_BUFFER, FileRecordBuffer) + DeviceExt->NtfsInfo.BytesPerFileRecord;
 705
 706     return STATUS_SUCCESS;
 707 }
 708
 709
 710 static
 711 NTSTATUS
 712 GetVolumeBitmap(PDEVICE_EXTENSION DeviceExt,
 713                 PIRP Irp)
 714 {
 715     NTSTATUS Status = STATUS_SUCCESS;
 716     PIO_STACK_LOCATION Stack;
 717     PVOLUME_BITMAP_BUFFER BitmapBuffer;
 718     LONGLONG StartingLcn;
 719     PFILE_RECORD_HEADER BitmapRecord;
 720     PNTFS_ATTR_CONTEXT DataContext;
 721     ULONGLONG TotalClusters;
 722     ULONGLONG ToCopy;
 723     BOOLEAN Overflow = FALSE;
 724
 725     DPRINT1("GetVolumeBitmap(%p, %p)\n", DeviceExt, Irp);
 726
 727     Stack = IoGetCurrentIrpStackLocation(Irp);
 728
 729     if (Stack->Parameters.FileSystemControl.InputBufferLength < sizeof(STARTING_LCN_INPUT_BUFFER))
 730     {
 731         DPRINT1("Invalid input! %d\n", Stack->Parameters.FileSystemControl.InputBufferLength);
 732         return STATUS_INVALID_PARAMETER;
 733     }
 734
 735     if (Stack->Parameters.FileSystemControl.OutputBufferLength < sizeof(VOLUME_BITMAP_BUFFER))
 736     {
 737         DPRINT1("Invalid output! %d\n", Stack->Parameters.FileSystemControl.OutputBufferLength);
 738         return STATUS_BUFFER_TOO_SMALL;
 739     }
 740
 741     BitmapBuffer = NtfsGetUserBuffer(Irp, FALSE);
 742     if (Irp->RequestorMode == UserMode)
 743     {
 744         _SEH2_TRY
 745         {
 746             ProbeForRead(Stack->Parameters.FileSystemControl.Type3InputBuffer,
 747                          Stack->Parameters.FileSystemControl.InputBufferLength,
 748                          sizeof(CHAR));
 749             ProbeForWrite(BitmapBuffer, Stack->Parameters.FileSystemControl.OutputBufferLength,
 750                           sizeof(CHAR));
 751         }
 752         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 753         {
 754             Status = _SEH2_GetExceptionCode();
 755         }
 756         _SEH2_END;
 757     }
 758     else
 759     {
 760         if (Stack->Parameters.FileSystemControl.Type3InputBuffer == NULL ||
 761             BitmapBuffer == NULL)
 762         {
 763             Status = STATUS_INVALID_PARAMETER;
 764         }
 765     }
 766
 767     if (!NT_SUCCESS(Status))
 768     {
 769         DPRINT1("Invalid buffer! %p %p\n", Stack->Parameters.FileSystemControl.Type3InputBuffer, BitmapBuffer);
 770         return Status;
 771     }
 772
 773     StartingLcn = ((PSTARTING_LCN_INPUT_BUFFER)Stack->Parameters.FileSystemControl.Type3InputBuffer)->StartingLcn.QuadPart;
 774     if (StartingLcn > DeviceExt->NtfsInfo.ClusterCount)
 775     {
 776         DPRINT1("Requested bitmap start beyond partition end: %I64x %I64x\n", DeviceExt->NtfsInfo.ClusterCount, StartingLcn);
 777         return STATUS_INVALID_PARAMETER;
 778     }
 779
 780     /* Round down to a multiple of 8 */
 781     StartingLcn = StartingLcn & ~7;
 782     TotalClusters = DeviceExt->NtfsInfo.ClusterCount - StartingLcn;
 783     ToCopy = TotalClusters / 8;
 784     if ((ToCopy + FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer)) > Stack->Parameters.FileSystemControl.OutputBufferLength)
 785     {
 786         DPRINT1("Buffer too small: %x, needed: %x\n", Stack->Parameters.FileSystemControl.OutputBufferLength, (ToCopy + FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer)));
 787         Overflow = TRUE;
 788         ToCopy = Stack->Parameters.FileSystemControl.OutputBufferLength - FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer);
 789     }
 790
 791     BitmapRecord = ExAllocatePoolWithTag(NonPagedPool,
 792                                          DeviceExt->NtfsInfo.BytesPerFileRecord,
 793                                          TAG_NTFS);
 794     if (BitmapRecord == NULL)
 795     {
 796         return STATUS_INSUFFICIENT_RESOURCES;
 797     }
 798
 799     Status = ReadFileRecord(DeviceExt, NTFS_FILE_BITMAP, BitmapRecord);
 800     if (!NT_SUCCESS(Status))
 801     {
 802         DPRINT1("Failed reading volume bitmap: %lx\n", Status);
 803         ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 804         return Status;
 805     }
 806
 807     Status = FindAttribute(DeviceExt, BitmapRecord, AttributeData, L"", 0, &DataContext);
 808     if (!NT_SUCCESS(Status))
 809     {
 810         DPRINT1("Failed find $DATA for bitmap: %lx\n", Status);
 811         ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 812         return Status;
 813     }
 814
 815     BitmapBuffer->StartingLcn.QuadPart = StartingLcn;
 816     BitmapBuffer->BitmapSize.QuadPart = ToCopy * 8;
 817
 818     Irp->IoStatus.Information = FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer);
 819     _SEH2_TRY
 820     {
 821         Irp->IoStatus.Information += ReadAttribute(DeviceExt, DataContext, StartingLcn / 8, (PCHAR)BitmapBuffer->Buffer, ToCopy);
 822         Status = (Overflow ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS);
 823     }
 824     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 825     {
 826         Status = _SEH2_GetExceptionCode();
 827     }
 828     _SEH2_END;
 829     ReleaseAttributeContext(DataContext);
 830     ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 831
 832     return Status;
 833 }
 834
 835
 836 static
 837 NTSTATUS
 838 NtfsUserFsRequest(PDEVICE_OBJECT DeviceObject,
 839                   PIRP Irp)
 840 {
 841     NTSTATUS Status;
 842     PIO_STACK_LOCATION Stack;
 843     PDEVICE_EXTENSION DeviceExt;
 844
 845     DPRINT1("NtfsUserFsRequest(%p, %p)\n", DeviceObject, Irp);
 846
 847     Stack = IoGetCurrentIrpStackLocation(Irp);
 848     DeviceExt = DeviceObject->DeviceExtension;
 849     switch (Stack->Parameters.FileSystemControl.FsControlCode)
 850     {
 851         case FSCTL_CREATE_USN_JOURNAL:
 852         case FSCTL_DELETE_USN_JOURNAL:
 853         case FSCTL_ENUM_USN_DATA:
 854         case FSCTL_EXTEND_VOLUME:
 855         //case FSCTL_GET_RETRIEVAL_POINTER_BASE:
 856         case FSCTL_GET_RETRIEVAL_POINTERS:
 857         case FSCTL_LOCK_VOLUME:
 858         //case FSCTL_LOOKUP_STREAM_FROM_CLUSTER:
 859         case FSCTL_MARK_HANDLE:
 860         case FSCTL_MOVE_FILE:
 861         case FSCTL_QUERY_USN_JOURNAL:
 862         case FSCTL_READ_FILE_USN_DATA:
 863         case FSCTL_READ_USN_JOURNAL:
 864         //case FSCTL_SHRINK_VOLUME:
 865         case FSCTL_UNLOCK_VOLUME:
 866         case FSCTL_WRITE_USN_CLOSE_RECORD:
 867             UNIMPLEMENTED;
 868             DPRINT1("Unimplemented user request: %x\n", Stack->Parameters.FileSystemControl.FsControlCode);
 869             Status = STATUS_NOT_IMPLEMENTED;
 870             break;
 871
 872         case FSCTL_GET_NTFS_VOLUME_DATA:
 873             Status = GetNfsVolumeData(DeviceExt, Irp);
 874             break;
 875
 876         case FSCTL_GET_NTFS_FILE_RECORD:
 877             Status = GetNtfsFileRecord(DeviceExt, Irp);
 878             break;
 879
 880         case FSCTL_GET_VOLUME_BITMAP:
 881             Status = GetVolumeBitmap(DeviceExt, Irp);
 882             break;
 883
 884         default:
 885             DPRINT("Invalid user request: %x\n", Stack->Parameters.FileSystemControl.FsControlCode);
 886             Status = STATUS_INVALID_DEVICE_REQUEST;
 887             break;
 888     }
 889
 890     return Status;
 891 }
 892
 893
 894 NTSTATUS
 895 NtfsFileSystemControl(PNTFS_IRP_CONTEXT IrpContext)
 896 {
 897     NTSTATUS Status;
 898     PIRP Irp;
 899     PDEVICE_OBJECT DeviceObject;
 900
 901     DPRINT1("NtfsFileSystemControl() called\n");
 902
 903     DeviceObject = IrpContext->DeviceObject;
 904     Irp = IrpContext->Irp;
 905     Irp->IoStatus.Information = 0;
 906
 907     switch (IrpContext->MinorFunction)
 908     {
 909         case IRP_MN_KERNEL_CALL:
 910             DPRINT1("NTFS: IRP_MN_USER_FS_REQUEST\n");
 911             Status = STATUS_INVALID_DEVICE_REQUEST;
 912             break;
 913
 914         case IRP_MN_USER_FS_REQUEST:
 915             Status = NtfsUserFsRequest(DeviceObject, Irp);
 916             break;
 917
 918         case IRP_MN_MOUNT_VOLUME:
 919             DPRINT("NTFS: IRP_MN_MOUNT_VOLUME\n");
 920             Status = NtfsMountVolume(DeviceObject, Irp);
 921             break;
 922
 923         case IRP_MN_VERIFY_VOLUME:
 924             DPRINT1("NTFS: IRP_MN_VERIFY_VOLUME\n");
 925             Status = NtfsVerifyVolume(DeviceObject, Irp);
 926             break;
 927
 928         default:
 929             DPRINT1("NTFS FSC: MinorFunction %d\n", IrpContext->MinorFunction);
 930             Status = STATUS_INVALID_DEVICE_REQUEST;
 931             break;
 932     }
 933
 934     return Status;
 935 }
 936
 937 /* EOF */