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,
 299                            DeviceExt->MasterFileTable,
 300                            AttributeData,
 301                            L"",
 302                            0,
 303                            &DeviceExt->MFTContext,
 304                            &DeviceExt->MftDataOffset);
 305     if (!NT_SUCCESS(Status))
 306     {
 307         DPRINT1("Can't find data attribute for Master File Table.\n");
 308         ExFreePool(DeviceExt->MasterFileTable);
 309         return Status;
 310     }
 311
 312     VolumeRecord = ExAllocatePoolWithTag(NonPagedPool,
 313                                          NtfsInfo->BytesPerFileRecord,
 314                                          TAG_NTFS);
 315     if (VolumeRecord == NULL)
 316     {
 317         DPRINT1("Allocation failed for volume record\n");
 318         ExFreePool(DeviceExt->MasterFileTable);
 319         return STATUS_INSUFFICIENT_RESOURCES;
 320     }
 321
 322     /* Read Volume File (MFT index 3) */
 323     DeviceExt->StorageDevice = DeviceObject;
 324     Status = ReadFileRecord(DeviceExt,
 325                             NTFS_FILE_VOLUME,
 326                             VolumeRecord);
 327     if (!NT_SUCCESS(Status))
 328     {
 329         DPRINT1("Failed reading volume file\n");
 330         ExFreePool(VolumeRecord);
 331         ExFreePool(DeviceExt->MasterFileTable);
 332         return Status;
 333     }
 334
 335     /* Enumerate attributes */
 336     NtfsDumpFileAttributes(DeviceExt, DeviceExt->MasterFileTable);
 337
 338     /* Enumerate attributes */
 339     NtfsDumpFileAttributes(DeviceExt, VolumeRecord);
 340
 341     /* Get volume name */
 342     Status = FindAttribute(DeviceExt, VolumeRecord, AttributeVolumeName, L"", 0, &AttrCtxt, NULL);
 343
 344     if (NT_SUCCESS(Status) && AttrCtxt->Record.Resident.ValueLength != 0)
 345     {
 346         Attribute = &AttrCtxt->Record;
 347         DPRINT("Data length %lu\n", AttributeDataLength(Attribute));
 348         NtfsInfo->VolumeLabelLength =
 349            min (Attribute->Resident.ValueLength, MAXIMUM_VOLUME_LABEL_LENGTH);
 350         RtlCopyMemory(NtfsInfo->VolumeLabel,
 351                       (PVOID)((ULONG_PTR)Attribute + Attribute->Resident.ValueOffset),
 352                       NtfsInfo->VolumeLabelLength);
 353         VolumeNameU = NtfsInfo->VolumeLabel;
 354     }
 355     else
 356     {
 357         NtfsInfo->VolumeLabelLength = 0;
 358         VolumeNameU = L"\0";
 359     }
 360
 361     if (NT_SUCCESS(Status))
 362     {
 363         ReleaseAttributeContext(AttrCtxt);
 364     }
 365
 366     VolumeFcb = NtfsCreateFCB(VolumeNameU, NULL, DeviceExt);
 367     if (VolumeFcb == NULL)
 368     {
 369         DPRINT1("Failed allocating volume FCB\n");
 370         ExFreePool(VolumeRecord);
 371         ExFreePool(DeviceExt->MasterFileTable);
 372         return STATUS_INSUFFICIENT_RESOURCES;
 373     }
 374
 375     VolumeFcb->Flags = FCB_IS_VOLUME;
 376     VolumeFcb->RFCB.FileSize.QuadPart = DeviceExt->NtfsInfo.SectorCount * DeviceExt->NtfsInfo.BytesPerSector;
 377     VolumeFcb->RFCB.ValidDataLength = VolumeFcb->RFCB.FileSize;
 378     VolumeFcb->RFCB.AllocationSize = VolumeFcb->RFCB.FileSize;
 379     VolumeFcb->MFTIndex = 0;
 380     DeviceExt->VolumeFcb = VolumeFcb;
 381
 382     /* Get volume information */
 383     Status = FindAttribute(DeviceExt, VolumeRecord, AttributeVolumeInformation, L"", 0, &AttrCtxt, NULL);
 384
 385     if (NT_SUCCESS(Status) && AttrCtxt->Record.Resident.ValueLength != 0)
 386     {
 387         Attribute = &AttrCtxt->Record;
 388         DPRINT("Data length %lu\n", AttributeDataLength (Attribute));
 389         VolumeInfo = (PVOID)((ULONG_PTR)Attribute + Attribute->Resident.ValueOffset);
 390
 391         NtfsInfo->MajorVersion = VolumeInfo->MajorVersion;
 392         NtfsInfo->MinorVersion = VolumeInfo->MinorVersion;
 393         NtfsInfo->Flags = VolumeInfo->Flags;
 394     }
 395
 396     if (NT_SUCCESS(Status))
 397     {
 398         ReleaseAttributeContext(AttrCtxt);
 399     }
 400
 401     ExFreePool(VolumeRecord);
 402
 403     NtfsInfo->MftZoneReservation = NtfsQueryMftZoneReservation();
 404
 405     return Status;
 406 }
 407
 408
 409 static
 410 NTSTATUS
 411 NtfsMountVolume(PDEVICE_OBJECT DeviceObject,
 412                 PIRP Irp)
 413 {
 414     PDEVICE_OBJECT NewDeviceObject = NULL;
 415     PDEVICE_OBJECT DeviceToMount;
 416     PIO_STACK_LOCATION Stack;
 417     PNTFS_FCB Fcb = NULL;
 418     PNTFS_CCB Ccb = NULL;
 419     PNTFS_VCB Vcb = NULL;
 420     NTSTATUS Status;
 421
 422     DPRINT1("NtfsMountVolume() called\n");
 423
 424     if (DeviceObject != NtfsGlobalData->DeviceObject)
 425     {
 426         Status = STATUS_INVALID_DEVICE_REQUEST;
 427         goto ByeBye;
 428     }
 429
 430     Stack = IoGetCurrentIrpStackLocation(Irp);
 431     DeviceToMount = Stack->Parameters.MountVolume.DeviceObject;
 432
 433     Status = NtfsHasFileSystem(DeviceToMount);
 434     if (!NT_SUCCESS(Status))
 435     {
 436         goto ByeBye;
 437     }
 438
 439     Status = IoCreateDevice(NtfsGlobalData->DriverObject,
 440                             sizeof(DEVICE_EXTENSION),
 441                             NULL,
 442                             FILE_DEVICE_DISK_FILE_SYSTEM,
 443                             0,
 444                             FALSE,
 445                             &NewDeviceObject);
 446     if (!NT_SUCCESS(Status))
 447         goto ByeBye;
 448
 449     NewDeviceObject->Flags |= DO_DIRECT_IO;
 450     Vcb = (PVOID)NewDeviceObject->DeviceExtension;
 451     RtlZeroMemory(Vcb, sizeof(NTFS_VCB));
 452
 453     Vcb->Identifier.Type = NTFS_TYPE_VCB;
 454     Vcb->Identifier.Size = sizeof(NTFS_TYPE_VCB);
 455
 456     Status = NtfsGetVolumeData(DeviceToMount,
 457                                Vcb);
 458     if (!NT_SUCCESS(Status))
 459         goto ByeBye;
 460
 461     NewDeviceObject->Vpb = DeviceToMount->Vpb;
 462
 463     Vcb->StorageDevice = DeviceToMount;
 464     Vcb->StorageDevice->Vpb->DeviceObject = NewDeviceObject;
 465     Vcb->StorageDevice->Vpb->RealDevice = Vcb->StorageDevice;
 466     Vcb->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
 467     NewDeviceObject->StackSize = Vcb->StorageDevice->StackSize + 1;
 468     NewDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 469
 470     Vcb->StreamFileObject = IoCreateStreamFileObject(NULL,
 471                                                      Vcb->StorageDevice);
 472
 473     InitializeListHead(&Vcb->FcbListHead);
 474
 475     Fcb = NtfsCreateFCB(NULL, NULL, Vcb);
 476     if (Fcb == NULL)
 477     {
 478         Status = STATUS_INSUFFICIENT_RESOURCES;
 479         goto ByeBye;
 480     }
 481
 482     Ccb = ExAllocatePoolWithTag(NonPagedPool,
 483                                 sizeof(NTFS_CCB),
 484                                 TAG_CCB);
 485     if (Ccb == NULL)
 486     {
 487         Status =  STATUS_INSUFFICIENT_RESOURCES;
 488         goto ByeBye;
 489     }
 490
 491     RtlZeroMemory(Ccb, sizeof(NTFS_CCB));
 492
 493     Ccb->Identifier.Type = NTFS_TYPE_CCB;
 494     Ccb->Identifier.Size = sizeof(NTFS_TYPE_CCB);
 495
 496     Vcb->StreamFileObject->FsContext = Fcb;
 497     Vcb->StreamFileObject->FsContext2 = Ccb;
 498     Vcb->StreamFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
 499     Vcb->StreamFileObject->PrivateCacheMap = NULL;
 500     Vcb->StreamFileObject->Vpb = Vcb->Vpb;
 501     Ccb->PtrFileObject = Vcb->StreamFileObject;
 502     Fcb->FileObject = Vcb->StreamFileObject;
 503     Fcb->Vcb = (PDEVICE_EXTENSION)Vcb->StorageDevice;
 504
 505     Fcb->Flags = FCB_IS_VOLUME_STREAM;
 506
 507     Fcb->RFCB.FileSize.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector;
 508     Fcb->RFCB.ValidDataLength.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector;
 509     Fcb->RFCB.AllocationSize.QuadPart = Vcb->NtfsInfo.SectorCount * Vcb->NtfsInfo.BytesPerSector; /* Correct? */
 510
 511 //    Fcb->Entry.ExtentLocationL = 0;
 512 //    Fcb->Entry.DataLengthL = DeviceExt->CdInfo.VolumeSpaceSize * BLOCKSIZE;
 513
 514     _SEH2_TRY
 515     {
 516         CcInitializeCacheMap(Vcb->StreamFileObject,
 517                              (PCC_FILE_SIZES)(&Fcb->RFCB.AllocationSize),
 518                              TRUE,
 519                              &(NtfsGlobalData->CacheMgrCallbacks),
 520                              Fcb);
 521     }
 522     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 523     {
 524         Status = _SEH2_GetExceptionCode();
 525         goto ByeBye;
 526     }
 527     _SEH2_END;
 528
 529     ExInitializeResourceLite(&Vcb->DirResource);
 530
 531     KeInitializeSpinLock(&Vcb->FcbListLock);
 532
 533     /* Get serial number */
 534     NewDeviceObject->Vpb->SerialNumber = Vcb->NtfsInfo.SerialNumber;
 535
 536     /* Get volume label */
 537     NewDeviceObject->Vpb->VolumeLabelLength = Vcb->NtfsInfo.VolumeLabelLength;
 538     RtlCopyMemory(NewDeviceObject->Vpb->VolumeLabel,
 539                   Vcb->NtfsInfo.VolumeLabel,
 540                   Vcb->NtfsInfo.VolumeLabelLength);
 541
 542     FsRtlNotifyVolumeEvent(Vcb->StreamFileObject, FSRTL_VOLUME_MOUNT);
 543
 544     Status = STATUS_SUCCESS;
 545
 546 ByeBye:
 547     if (!NT_SUCCESS(Status))
 548     {
 549         /* Cleanup */
 550         if (Vcb && Vcb->StreamFileObject)
 551             ObDereferenceObject(Vcb->StreamFileObject);
 552
 553         if (Fcb)
 554             NtfsDestroyFCB(Fcb);
 555
 556         if (Ccb)
 557             ExFreePool(Ccb);
 558
 559         if (NewDeviceObject)
 560             IoDeleteDevice(NewDeviceObject);
 561     }
 562
 563     DPRINT("NtfsMountVolume() done (Status: %lx)\n", Status);
 564
 565     return Status;
 566 }
 567
 568
 569 static
 570 NTSTATUS
 571 NtfsVerifyVolume(PDEVICE_OBJECT DeviceObject,
 572                  PIRP Irp)
 573 {
 574     UNREFERENCED_PARAMETER(DeviceObject);
 575     UNREFERENCED_PARAMETER(Irp);
 576     DPRINT1("NtfsVerifyVolume() called\n");
 577     return STATUS_WRONG_VOLUME;
 578 }
 579
 580
 581 static
 582 NTSTATUS
 583 GetNfsVolumeData(PDEVICE_EXTENSION DeviceExt,
 584                  PIRP Irp)
 585 {
 586     PIO_STACK_LOCATION Stack;
 587     PNTFS_VOLUME_DATA_BUFFER DataBuffer;
 588     PNTFS_ATTR_RECORD Attribute;
 589     FIND_ATTR_CONTXT Context;
 590     NTSTATUS Status;
 591
 592     DataBuffer = (PNTFS_VOLUME_DATA_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 593     Stack = IoGetCurrentIrpStackLocation(Irp);
 594
 595     if (Stack->Parameters.FileSystemControl.OutputBufferLength < sizeof(NTFS_VOLUME_DATA_BUFFER) ||
 596         Irp->UserBuffer == NULL)
 597     {
 598         DPRINT1("Invalid output! %d %p\n", Stack->Parameters.FileSystemControl.OutputBufferLength, Irp->UserBuffer);
 599         return STATUS_INVALID_PARAMETER;
 600     }
 601
 602     DataBuffer->VolumeSerialNumber.QuadPart = DeviceExt->NtfsInfo.SerialNumber;
 603     DataBuffer->NumberSectors.QuadPart = DeviceExt->NtfsInfo.SectorCount;
 604     DataBuffer->TotalClusters.QuadPart = DeviceExt->NtfsInfo.ClusterCount;
 605     DataBuffer->FreeClusters.QuadPart = NtfsGetFreeClusters(DeviceExt);
 606     DataBuffer->TotalReserved.QuadPart = 0LL; // FIXME
 607     DataBuffer->BytesPerSector = DeviceExt->NtfsInfo.BytesPerSector;
 608     DataBuffer->BytesPerCluster = DeviceExt->NtfsInfo.BytesPerCluster;
 609     DataBuffer->BytesPerFileRecordSegment = DeviceExt->NtfsInfo.BytesPerFileRecord;
 610     DataBuffer->ClustersPerFileRecordSegment = DeviceExt->NtfsInfo.BytesPerFileRecord / DeviceExt->NtfsInfo.BytesPerCluster;
 611     DataBuffer->MftStartLcn.QuadPart = DeviceExt->NtfsInfo.MftStart.QuadPart;
 612     DataBuffer->Mft2StartLcn.QuadPart = DeviceExt->NtfsInfo.MftMirrStart.QuadPart;
 613     DataBuffer->MftZoneStart.QuadPart = 0; // FIXME
 614     DataBuffer->MftZoneEnd.QuadPart = 0; // FIXME
 615
 616     Status = FindFirstAttribute(&Context, DeviceExt, DeviceExt->MasterFileTable, FALSE, &Attribute);
 617     while (NT_SUCCESS(Status))
 618     {
 619         if (Attribute->Type == AttributeData)
 620         {
 621             ASSERT(Attribute->IsNonResident);
 622             DataBuffer->MftValidDataLength.QuadPart = Attribute->NonResident.DataSize;
 623
 624             break;
 625         }
 626
 627         Status = FindNextAttribute(&Context, &Attribute);
 628     }
 629     FindCloseAttribute(&Context);
 630
 631     Irp->IoStatus.Information = sizeof(NTFS_VOLUME_DATA_BUFFER);
 632
 633     if (Stack->Parameters.FileSystemControl.OutputBufferLength >= sizeof(NTFS_EXTENDED_VOLUME_DATA) + sizeof(NTFS_VOLUME_DATA_BUFFER))
 634     {
 635         PNTFS_EXTENDED_VOLUME_DATA ExtendedData = (PNTFS_EXTENDED_VOLUME_DATA)((ULONG_PTR)Irp->UserBuffer + sizeof(NTFS_VOLUME_DATA_BUFFER));
 636
 637         ExtendedData->ByteCount = sizeof(NTFS_EXTENDED_VOLUME_DATA);
 638         ExtendedData->MajorVersion = DeviceExt->NtfsInfo.MajorVersion;
 639         ExtendedData->MinorVersion = DeviceExt->NtfsInfo.MinorVersion;
 640         Irp->IoStatus.Information += sizeof(NTFS_EXTENDED_VOLUME_DATA);
 641     }
 642
 643     return STATUS_SUCCESS;
 644 }
 645
 646
 647 static
 648 NTSTATUS
 649 GetNtfsFileRecord(PDEVICE_EXTENSION DeviceExt,
 650                   PIRP Irp)
 651 {
 652     NTSTATUS Status;
 653     PIO_STACK_LOCATION Stack;
 654     PNTFS_FILE_RECORD_INPUT_BUFFER InputBuffer;
 655     PFILE_RECORD_HEADER FileRecord;
 656     PNTFS_FILE_RECORD_OUTPUT_BUFFER OutputBuffer;
 657     ULONGLONG MFTRecord;
 658
 659     Stack = IoGetCurrentIrpStackLocation(Irp);
 660
 661     if (Stack->Parameters.FileSystemControl.InputBufferLength < sizeof(NTFS_FILE_RECORD_INPUT_BUFFER) ||
 662         Irp->AssociatedIrp.SystemBuffer == NULL)
 663     {
 664         DPRINT1("Invalid input! %d %p\n", Stack->Parameters.FileSystemControl.InputBufferLength, Irp->AssociatedIrp.SystemBuffer);
 665         return STATUS_INVALID_PARAMETER;
 666     }
 667
 668     if (Stack->Parameters.FileSystemControl.OutputBufferLength < (FIELD_OFFSET(NTFS_FILE_RECORD_OUTPUT_BUFFER, FileRecordBuffer) + DeviceExt->NtfsInfo.BytesPerFileRecord) ||
 669         Irp->AssociatedIrp.SystemBuffer == NULL)
 670     {
 671         DPRINT1("Invalid output! %d %p\n", Stack->Parameters.FileSystemControl.OutputBufferLength, Irp->AssociatedIrp.SystemBuffer);
 672         return STATUS_BUFFER_TOO_SMALL;
 673     }
 674
 675     FileRecord = ExAllocatePoolWithTag(NonPagedPool,
 676                                        DeviceExt->NtfsInfo.BytesPerFileRecord,
 677                                        TAG_NTFS);
 678     if (FileRecord == NULL)
 679     {
 680         return STATUS_INSUFFICIENT_RESOURCES;
 681     }
 682
 683     InputBuffer = (PNTFS_FILE_RECORD_INPUT_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 684
 685     MFTRecord = InputBuffer->FileReferenceNumber.QuadPart;
 686     DPRINT1("Requesting: %I64x\n", MFTRecord);
 687
 688     do
 689     {
 690         Status = ReadFileRecord(DeviceExt, MFTRecord, FileRecord);
 691         if (NT_SUCCESS(Status))
 692         {
 693             if (FileRecord->Flags & FRH_IN_USE)
 694             {
 695                 break;
 696             }
 697         }
 698
 699         --MFTRecord;
 700     } while (TRUE);
 701
 702     DPRINT1("Returning: %I64x\n", MFTRecord);
 703     OutputBuffer = (PNTFS_FILE_RECORD_OUTPUT_BUFFER)Irp->AssociatedIrp.SystemBuffer;
 704     OutputBuffer->FileReferenceNumber.QuadPart = MFTRecord;
 705     OutputBuffer->FileRecordLength = DeviceExt->NtfsInfo.BytesPerFileRecord;
 706     RtlCopyMemory(OutputBuffer->FileRecordBuffer, FileRecord, DeviceExt->NtfsInfo.BytesPerFileRecord);
 707
 708     ExFreePoolWithTag(FileRecord, TAG_NTFS);
 709
 710     Irp->IoStatus.Information = FIELD_OFFSET(NTFS_FILE_RECORD_OUTPUT_BUFFER, FileRecordBuffer) + DeviceExt->NtfsInfo.BytesPerFileRecord;
 711
 712     return STATUS_SUCCESS;
 713 }
 714
 715
 716 static
 717 NTSTATUS
 718 GetVolumeBitmap(PDEVICE_EXTENSION DeviceExt,
 719                 PIRP Irp)
 720 {
 721     NTSTATUS Status = STATUS_SUCCESS;
 722     PIO_STACK_LOCATION Stack;
 723     PVOLUME_BITMAP_BUFFER BitmapBuffer;
 724     LONGLONG StartingLcn;
 725     PFILE_RECORD_HEADER BitmapRecord;
 726     PNTFS_ATTR_CONTEXT DataContext;
 727     ULONGLONG TotalClusters;
 728     ULONGLONG ToCopy;
 729     BOOLEAN Overflow = FALSE;
 730
 731     DPRINT1("GetVolumeBitmap(%p, %p)\n", DeviceExt, Irp);
 732
 733     Stack = IoGetCurrentIrpStackLocation(Irp);
 734
 735     if (Stack->Parameters.FileSystemControl.InputBufferLength < sizeof(STARTING_LCN_INPUT_BUFFER))
 736     {
 737         DPRINT1("Invalid input! %d\n", Stack->Parameters.FileSystemControl.InputBufferLength);
 738         return STATUS_INVALID_PARAMETER;
 739     }
 740
 741     if (Stack->Parameters.FileSystemControl.OutputBufferLength < sizeof(VOLUME_BITMAP_BUFFER))
 742     {
 743         DPRINT1("Invalid output! %d\n", Stack->Parameters.FileSystemControl.OutputBufferLength);
 744         return STATUS_BUFFER_TOO_SMALL;
 745     }
 746
 747     BitmapBuffer = NtfsGetUserBuffer(Irp, FALSE);
 748     if (Irp->RequestorMode == UserMode)
 749     {
 750         _SEH2_TRY
 751         {
 752             ProbeForRead(Stack->Parameters.FileSystemControl.Type3InputBuffer,
 753                          Stack->Parameters.FileSystemControl.InputBufferLength,
 754                          sizeof(CHAR));
 755             ProbeForWrite(BitmapBuffer, Stack->Parameters.FileSystemControl.OutputBufferLength,
 756                           sizeof(CHAR));
 757         }
 758         _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 759         {
 760             Status = _SEH2_GetExceptionCode();
 761         }
 762         _SEH2_END;
 763     }
 764     else
 765     {
 766         if (Stack->Parameters.FileSystemControl.Type3InputBuffer == NULL ||
 767             BitmapBuffer == NULL)
 768         {
 769             Status = STATUS_INVALID_PARAMETER;
 770         }
 771     }
 772
 773     if (!NT_SUCCESS(Status))
 774     {
 775         DPRINT1("Invalid buffer! %p %p\n", Stack->Parameters.FileSystemControl.Type3InputBuffer, BitmapBuffer);
 776         return Status;
 777     }
 778
 779     StartingLcn = ((PSTARTING_LCN_INPUT_BUFFER)Stack->Parameters.FileSystemControl.Type3InputBuffer)->StartingLcn.QuadPart;
 780     if (StartingLcn > DeviceExt->NtfsInfo.ClusterCount)
 781     {
 782         DPRINT1("Requested bitmap start beyond partition end: %I64x %I64x\n", DeviceExt->NtfsInfo.ClusterCount, StartingLcn);
 783         return STATUS_INVALID_PARAMETER;
 784     }
 785
 786     /* Round down to a multiple of 8 */
 787     StartingLcn = StartingLcn & ~7;
 788     TotalClusters = DeviceExt->NtfsInfo.ClusterCount - StartingLcn;
 789     ToCopy = TotalClusters / 8;
 790     if ((ToCopy + FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer)) > Stack->Parameters.FileSystemControl.OutputBufferLength)
 791     {
 792         DPRINT1("Buffer too small: %x, needed: %x\n", Stack->Parameters.FileSystemControl.OutputBufferLength, (ToCopy + FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer)));
 793         Overflow = TRUE;
 794         ToCopy = Stack->Parameters.FileSystemControl.OutputBufferLength - FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer);
 795     }
 796
 797     BitmapRecord = ExAllocatePoolWithTag(NonPagedPool,
 798                                          DeviceExt->NtfsInfo.BytesPerFileRecord,
 799                                          TAG_NTFS);
 800     if (BitmapRecord == NULL)
 801     {
 802         return STATUS_INSUFFICIENT_RESOURCES;
 803     }
 804
 805     Status = ReadFileRecord(DeviceExt, NTFS_FILE_BITMAP, BitmapRecord);
 806     if (!NT_SUCCESS(Status))
 807     {
 808         DPRINT1("Failed reading volume bitmap: %lx\n", Status);
 809         ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 810         return Status;
 811     }
 812
 813     Status = FindAttribute(DeviceExt, BitmapRecord, AttributeData, L"", 0, &DataContext, NULL);
 814     if (!NT_SUCCESS(Status))
 815     {
 816         DPRINT1("Failed find $DATA for bitmap: %lx\n", Status);
 817         ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 818         return Status;
 819     }
 820
 821     BitmapBuffer->StartingLcn.QuadPart = StartingLcn;
 822     BitmapBuffer->BitmapSize.QuadPart = ToCopy * 8;
 823
 824     Irp->IoStatus.Information = FIELD_OFFSET(VOLUME_BITMAP_BUFFER, Buffer);
 825     _SEH2_TRY
 826     {
 827         Irp->IoStatus.Information += ReadAttribute(DeviceExt, DataContext, StartingLcn / 8, (PCHAR)BitmapBuffer->Buffer, ToCopy);
 828         Status = (Overflow ? STATUS_BUFFER_OVERFLOW : STATUS_SUCCESS);
 829     }
 830     _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 831     {
 832         Status = _SEH2_GetExceptionCode();
 833     }
 834     _SEH2_END;
 835     ReleaseAttributeContext(DataContext);
 836     ExFreePoolWithTag(BitmapRecord, TAG_NTFS);
 837
 838     return Status;
 839 }
 840
 841
 842 static
 843 NTSTATUS
 844 LockOrUnlockVolume(PDEVICE_EXTENSION DeviceExt,
 845                    PIRP Irp,
 846                    BOOLEAN Lock)
 847 {
 848     PFILE_OBJECT FileObject;
 849     PNTFS_FCB Fcb;
 850     PIO_STACK_LOCATION Stack;
 851
 852     DPRINT("LockOrUnlockVolume(%p, %p, %d)\n", DeviceExt, Irp, Lock);
 853
 854     Stack = IoGetCurrentIrpStackLocation(Irp);
 855     FileObject = Stack->FileObject;
 856     Fcb = FileObject->FsContext;
 857
 858     /* Only allow locking with the volume open */
 859     if (!(Fcb->Flags & FCB_IS_VOLUME))
 860     {
 861         return STATUS_ACCESS_DENIED;
 862     }
 863
 864     /* Bail out if it's already in the demanded state */
 865     if (((DeviceExt->Flags & VCB_VOLUME_LOCKED) && Lock) ||
 866         (!(DeviceExt->Flags & VCB_VOLUME_LOCKED) && !Lock))
 867     {
 868         return STATUS_ACCESS_DENIED;
 869     }
 870
 871     /* Deny locking if we're not alone */
 872     if (Lock && DeviceExt->OpenHandleCount != 1)
 873     {
 874         return STATUS_ACCESS_DENIED;
 875     }
 876
 877     /* Finally, proceed */
 878     if (Lock)
 879     {
 880         DeviceExt->Flags |= VCB_VOLUME_LOCKED;
 881     }
 882     else
 883     {
 884         DeviceExt->Flags &= ~VCB_VOLUME_LOCKED;
 885     }
 886
 887     return STATUS_SUCCESS;
 888 }
 889
 890
 891 static
 892 NTSTATUS
 893 NtfsUserFsRequest(PDEVICE_OBJECT DeviceObject,
 894                   PIRP Irp)
 895 {
 896     NTSTATUS Status;
 897     PIO_STACK_LOCATION Stack;
 898     PDEVICE_EXTENSION DeviceExt;
 899
 900     DPRINT1("NtfsUserFsRequest(%p, %p)\n", DeviceObject, Irp);
 901
 902     Stack = IoGetCurrentIrpStackLocation(Irp);
 903     DeviceExt = DeviceObject->DeviceExtension;
 904     switch (Stack->Parameters.FileSystemControl.FsControlCode)
 905     {
 906         case FSCTL_CREATE_USN_JOURNAL:
 907         case FSCTL_DELETE_USN_JOURNAL:
 908         case FSCTL_ENUM_USN_DATA:
 909         case FSCTL_EXTEND_VOLUME:
 910         //case FSCTL_GET_RETRIEVAL_POINTER_BASE:
 911         case FSCTL_GET_RETRIEVAL_POINTERS:
 912         //case FSCTL_LOOKUP_STREAM_FROM_CLUSTER:
 913         case FSCTL_MARK_HANDLE:
 914         case FSCTL_MOVE_FILE:
 915         case FSCTL_QUERY_USN_JOURNAL:
 916         case FSCTL_READ_FILE_USN_DATA:
 917         case FSCTL_READ_USN_JOURNAL:
 918         //case FSCTL_SHRINK_VOLUME:
 919         case FSCTL_WRITE_USN_CLOSE_RECORD:
 920             UNIMPLEMENTED;
 921             DPRINT1("Unimplemented user request: %x\n", Stack->Parameters.FileSystemControl.FsControlCode);
 922             Status = STATUS_NOT_IMPLEMENTED;
 923             break;
 924
 925         case FSCTL_LOCK_VOLUME:
 926             Status = LockOrUnlockVolume(DeviceExt, Irp, TRUE);
 927             break;
 928
 929         case FSCTL_UNLOCK_VOLUME:
 930             Status = LockOrUnlockVolume(DeviceExt, Irp, FALSE);
 931             break;
 932
 933         case FSCTL_GET_NTFS_VOLUME_DATA:
 934             Status = GetNfsVolumeData(DeviceExt, Irp);
 935             break;
 936
 937         case FSCTL_GET_NTFS_FILE_RECORD:
 938             Status = GetNtfsFileRecord(DeviceExt, Irp);
 939             break;
 940
 941         case FSCTL_GET_VOLUME_BITMAP:
 942             Status = GetVolumeBitmap(DeviceExt, Irp);
 943             break;
 944
 945         default:
 946             DPRINT("Invalid user request: %x\n", Stack->Parameters.FileSystemControl.FsControlCode);
 947             Status = STATUS_INVALID_DEVICE_REQUEST;
 948             break;
 949     }
 950
 951     return Status;
 952 }
 953
 954
 955 NTSTATUS
 956 NtfsFileSystemControl(PNTFS_IRP_CONTEXT IrpContext)
 957 {
 958     NTSTATUS Status;
 959     PIRP Irp;
 960     PDEVICE_OBJECT DeviceObject;
 961
 962     DPRINT1("NtfsFileSystemControl() called\n");
 963
 964     DeviceObject = IrpContext->DeviceObject;
 965     Irp = IrpContext->Irp;
 966     Irp->IoStatus.Information = 0;
 967
 968     switch (IrpContext->MinorFunction)
 969     {
 970         case IRP_MN_KERNEL_CALL:
 971             DPRINT1("NTFS: IRP_MN_USER_FS_REQUEST\n");
 972             Status = STATUS_INVALID_DEVICE_REQUEST;
 973             break;
 974
 975         case IRP_MN_USER_FS_REQUEST:
 976             Status = NtfsUserFsRequest(DeviceObject, Irp);
 977             break;
 978
 979         case IRP_MN_MOUNT_VOLUME:
 980             DPRINT("NTFS: IRP_MN_MOUNT_VOLUME\n");
 981             Status = NtfsMountVolume(DeviceObject, Irp);
 982             break;
 983
 984         case IRP_MN_VERIFY_VOLUME:
 985             DPRINT1("NTFS: IRP_MN_VERIFY_VOLUME\n");
 986             Status = NtfsVerifyVolume(DeviceObject, Irp);
 987             break;
 988
 989         default:
 990             DPRINT1("NTFS FSC: MinorFunction %d\n", IrpContext->MinorFunction);
 991             Status = STATUS_INVALID_DEVICE_REQUEST;
 992             break;
 993     }
 994
 995     return Status;
 996 }
 997
 998 /* EOF */