drivers/fs/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., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /* $Id$
  20  *
  21  * COPYRIGHT:        See COPYING in the top level directory
  22  * PROJECT:          ReactOS kernel
  23  * FILE:             services/fs/ntfs/fsctl.c
  24  * PURPOSE:          NTFS filesystem driver
  25  * PROGRAMMER:       Eric Kohl
  26  */
  27
  28 /* INCLUDES *****************************************************************/
  29
  30 #include <ddk/ntddk.h>
  31
  32 //#define NDEBUG
  33 #include <debug.h>
  34
  35 #include "ntfs.h"
  36
  37 /* FUNCTIONS ****************************************************************/
  38
  39 static NTSTATUS
  40 NtfsHasFileSystem(PDEVICE_OBJECT DeviceToMount)
  41 /*
  42  * FUNCTION: Tests if the device contains a filesystem that can be mounted
  43  * by this fsd
  44  */
  45 {
  46   PARTITION_INFORMATION PartitionInfo;
  47   DISK_GEOMETRY DiskGeometry;
  48   ULONG Size;
  49   PBOOT_SECTOR BootSector;
  50   NTSTATUS Status;
  51
  52   DPRINT("NtfsHasFileSystem() called\n");
  53
  54   Size = sizeof(DISK_GEOMETRY);
  55   Status = NtfsDeviceIoControl(DeviceToMount,
  56                                IOCTL_DISK_GET_DRIVE_GEOMETRY,
  57                                NULL,
  58                                0,
  59                                &DiskGeometry,
  60                                &Size);
  61   if (!NT_SUCCESS(Status))
  62     {
  63       DPRINT("NtfsDeviceIoControl() failed (Status %lx)\n", Status);
  64       return(Status);
  65     }
  66
  67   if (DiskGeometry.MediaType == FixedMedia)
  68     {
  69       /* We have found a hard disk */
  70       Size = sizeof(PARTITION_INFORMATION);
  71       Status = NtfsDeviceIoControl(DeviceToMount,
  72                                    IOCTL_DISK_GET_PARTITION_INFO,
  73                                    NULL,
  74                                    0,
  75                                    &PartitionInfo,
  76                                    &Size);
  77       if (!NT_SUCCESS(Status))
  78         {
  79           DPRINT("NtfsDeviceIoControl() failed (Status %lx)\n", Status);
  80           return(Status);
  81         }
  82
  83       if (PartitionInfo.PartitionType != PARTITION_IFS)
  84         {
  85           return(STATUS_UNRECOGNIZED_VOLUME);
  86         }
  87     }
  88
  89   DPRINT("BytesPerSector: %lu\n", DiskGeometry.BytesPerSector);
  90   BootSector = ExAllocatePool(NonPagedPool,
  91                               DiskGeometry.BytesPerSector);
  92   if (BootSector == NULL)
  93     {
  94       return(STATUS_INSUFFICIENT_RESOURCES);
  95     }
  96
  97   Status = NtfsReadRawSectors(DeviceToMount,
  98                               0,
  99                               1,
 100                               DiskGeometry.BytesPerSector,
 101                               (PVOID)BootSector);
 102   if (NT_SUCCESS(Status))
 103     {
 104       DPRINT("NTFS-identifier: [%.8s]\n", BootSector->OemName);
 105       if (strncmp(BootSector->OemName, "NTFS    ", 8) != 0)
 106         {
 107           Status = STATUS_UNRECOGNIZED_VOLUME;
 108         }
 109     }
 110
 111   ExFreePool(BootSector);
 112
 113   return(Status);
 114 }
 115
 116
 117 static NTSTATUS
 118 NtfsGetVolumeData(PDEVICE_OBJECT DeviceObject,
 119                   PDEVICE_EXTENSION Vcb)
 120 {
 121   DISK_GEOMETRY DiskGeometry;
 122 //  PUCHAR Buffer;
 123   ULONG Size;
 124   NTSTATUS Status;
 125   PBOOT_SECTOR BootSector;
 126
 127   DPRINT("NtfsGetVolumeData() called\n");
 128
 129   Size = sizeof(DISK_GEOMETRY);
 130   Status = NtfsDeviceIoControl(DeviceObject,
 131                                IOCTL_DISK_GET_DRIVE_GEOMETRY,
 132                                NULL,
 133                                0,
 134                                &DiskGeometry,
 135                                &Size);
 136   if (!NT_SUCCESS(Status))
 137     {
 138       DPRINT("NtfsDeviceIoControl() failed (Status %lx)\n", Status);
 139       return(Status);
 140     }
 141
 142   DPRINT("BytesPerSector: %lu\n", DiskGeometry.BytesPerSector);
 143   BootSector = ExAllocatePool(NonPagedPool,
 144                               DiskGeometry.BytesPerSector);
 145   if (BootSector == NULL)
 146     {
 147       return(STATUS_INSUFFICIENT_RESOURCES);
 148     }
 149
 150   Status = NtfsReadRawSectors(DeviceObject,
 151                               0, /* Partition boot sector */
 152                               1,
 153                               DiskGeometry.BytesPerSector,
 154                               (PVOID)BootSector);
 155   if (NT_SUCCESS(Status))
 156     {
 157       /* Read data from the bootsector */
 158       Vcb->NtfsInfo.BytesPerSector = BootSector->BytesPerSector;
 159       Vcb->NtfsInfo.SectorsPerCluster = BootSector->SectorsPerCluster;
 160       Vcb->NtfsInfo.BytesPerCluster = BootSector->BytesPerSector * BootSector->SectorsPerCluster;
 161       Vcb->NtfsInfo.SectorCount = BootSector->SectorCount;
 162
 163       Vcb->NtfsInfo.MftStart.QuadPart = BootSector->MftLocation;
 164       Vcb->NtfsInfo.MftMirrStart.QuadPart = BootSector->MftMirrLocation;
 165       Vcb->NtfsInfo.SerialNumber = BootSector->SerialNumber;
 166
 167 //#indef NDEBUG
 168       DbgPrint("Boot sector information:\n");
 169       DbgPrint("  BytesPerSector:         %hu\n", BootSector->BytesPerSector);
 170       DbgPrint("  SectorsPerCluster:      %hu\n", BootSector->SectorsPerCluster);
 171
 172       DbgPrint("  SectorCount:            %I64u\n", BootSector->SectorCount);
 173
 174       DbgPrint("  MftStart:               %I64u\n", BootSector->MftLocation);
 175       DbgPrint("  MftMirrStart:           %I64u\n", BootSector->MftMirrLocation);
 176
 177       DbgPrint("  ClustersPerMftRecord:   %lx\n", BootSector->ClustersPerMftRecord);
 178       DbgPrint("  ClustersPerIndexRecord: %lx\n", BootSector->ClustersPerIndexRecord);
 179
 180       DbgPrint("  SerialNumber:           %I64x\n", BootSector->SerialNumber);
 181 //#endif
 182
 183       NtfsOpenMft(DeviceObject, Vcb);
 184
 185     }
 186
 187   ExFreePool(BootSector);
 188
 189   return(Status);
 190 }
 191
 192
 193
 194 static NTSTATUS
 195 NtfsMountVolume(PDEVICE_OBJECT DeviceObject,
 196                 PIRP Irp)
 197 {
 198   PDEVICE_EXTENSION DeviceExt = NULL;
 199   PDEVICE_OBJECT NewDeviceObject = NULL;
 200   PDEVICE_OBJECT DeviceToMount;
 201   PIO_STACK_LOCATION Stack;
 202   PFCB Fcb = NULL;
 203   PCCB Ccb = NULL;
 204   PVPB Vpb;
 205   NTSTATUS Status;
 206
 207   DPRINT("NtfsMountVolume() called\n");
 208
 209   if (DeviceObject != NtfsGlobalData->DeviceObject)
 210     {
 211       Status = STATUS_INVALID_DEVICE_REQUEST;
 212       goto ByeBye;
 213     }
 214
 215   Stack = IoGetCurrentIrpStackLocation(Irp);
 216   DeviceToMount = Stack->Parameters.MountVolume.DeviceObject;
 217   Vpb = Stack->Parameters.MountVolume.Vpb;
 218
 219   Status = NtfsHasFileSystem(DeviceToMount);
 220   if (!NT_SUCCESS(Status))
 221     {
 222       goto ByeBye;
 223     }
 224
 225   Status = IoCreateDevice(NtfsGlobalData->DriverObject,
 226                           sizeof(DEVICE_EXTENSION),
 227                           NULL,
 228                           FILE_DEVICE_FILE_SYSTEM,
 229 //                        FILE_DEVICE_DISK_FILE_SYSTEM,
 230                           0,
 231                           FALSE,
 232                           &NewDeviceObject);
 233   if (!NT_SUCCESS(Status))
 234     goto ByeBye;
 235
 236   NewDeviceObject->Flags = NewDeviceObject->Flags | DO_DIRECT_IO;
 237   DeviceExt = (PVOID)NewDeviceObject->DeviceExtension;
 238   RtlZeroMemory(DeviceExt,
 239                 sizeof(DEVICE_EXTENSION));
 240
 241   Status = NtfsGetVolumeData(DeviceToMount,
 242                              DeviceExt);
 243   if (!NT_SUCCESS(Status))
 244     goto ByeBye;
 245
 246   NewDeviceObject->Vpb = DeviceToMount->Vpb;
 247
 248   DeviceExt->StorageDevice = DeviceToMount;
 249   DeviceExt->StorageDevice->Vpb->DeviceObject = NewDeviceObject;
 250   DeviceExt->StorageDevice->Vpb->RealDevice = DeviceExt->StorageDevice;
 251   DeviceExt->StorageDevice->Vpb->Flags |= VPB_MOUNTED;
 252   NewDeviceObject->StackSize = DeviceExt->StorageDevice->StackSize + 1;
 253   NewDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
 254
 255   DeviceExt->StreamFileObject = IoCreateStreamFileObject(NULL,
 256                                                          DeviceExt->StorageDevice);
 257
 258
 259   Fcb = NtfsCreateFCB(NULL);
 260   if (Fcb == NULL)
 261     {
 262       Status = STATUS_INSUFFICIENT_RESOURCES;
 263       goto ByeBye;
 264     }
 265
 266   Ccb = ExAllocatePoolWithTag(NonPagedPool,
 267                               sizeof(CCB),
 268                               TAG_CCB);
 269   if (Ccb == NULL)
 270     {
 271       Status =  STATUS_INSUFFICIENT_RESOURCES;
 272       goto ByeBye;
 273     }
 274   RtlZeroMemory(Ccb,
 275                 sizeof(CCB));
 276
 277   DeviceExt->StreamFileObject->Flags = DeviceExt->StreamFileObject->Flags | FO_FCB_IS_VALID | FO_DIRECT_CACHE_PAGING_READ;
 278   DeviceExt->StreamFileObject->FsContext = Fcb;
 279   DeviceExt->StreamFileObject->FsContext2 = Ccb;
 280   DeviceExt->StreamFileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;
 281   DeviceExt->StreamFileObject->PrivateCacheMap = NULL;
 282   DeviceExt->StreamFileObject->Vpb = DeviceExt->Vpb;
 283   Ccb->PtrFileObject = DeviceExt->StreamFileObject;
 284   Fcb->FileObject = DeviceExt->StreamFileObject;
 285   Fcb->DevExt = (PDEVICE_EXTENSION)DeviceExt->StorageDevice;
 286
 287   Fcb->Flags = FCB_IS_VOLUME_STREAM;
 288
 289   Fcb->RFCB.FileSize.QuadPart = DeviceExt->NtfsInfo.SectorCount * DeviceExt->NtfsInfo.BytesPerSector;
 290   Fcb->RFCB.ValidDataLength.QuadPart = DeviceExt->NtfsInfo.SectorCount * DeviceExt->NtfsInfo.BytesPerSector;
 291   Fcb->RFCB.AllocationSize.QuadPart = DeviceExt->NtfsInfo.SectorCount * DeviceExt->NtfsInfo.BytesPerSector; /* Correct? */
 292
 293 //  Fcb->Entry.ExtentLocationL = 0;
 294 //  Fcb->Entry.DataLengthL = DeviceExt->CdInfo.VolumeSpaceSize * BLOCKSIZE;
 295
 296   Status = CcRosInitializeFileCache(DeviceExt->StreamFileObject,
 297                                     CACHEPAGESIZE(DeviceExt));
 298   if (!NT_SUCCESS (Status))
 299     {
 300       DbgPrint("CcRosInitializeFileCache() failed (Status %lx)\n", Status);
 301       goto ByeBye;
 302     }
 303
 304   ExInitializeResourceLite(&DeviceExt->DirResource);
 305 //  ExInitializeResourceLite(&DeviceExt->FatResource);
 306
 307   KeInitializeSpinLock(&DeviceExt->FcbListLock);
 308   InitializeListHead(&DeviceExt->FcbListHead);
 309
 310   /* Read serial number */
 311   NewDeviceObject->Vpb->SerialNumber = DeviceExt->NtfsInfo.SerialNumber;
 312
 313   /* Read volume label */
 314 //  NtfsReadVolumeLabel(DeviceExt,
 315 //                    NewDeviceObject->Vpb);
 316
 317   Status = STATUS_SUCCESS;
 318
 319 ByeBye:
 320   if (!NT_SUCCESS(Status))
 321     {
 322       /* Cleanup */
 323       if (DeviceExt && DeviceExt->StreamFileObject)
 324         ObDereferenceObject(DeviceExt->StreamFileObject);
 325       if (Fcb)
 326         ExFreePool(Fcb);
 327       if (Ccb)
 328         ExFreePool(Ccb);
 329       if (NewDeviceObject)
 330         IoDeleteDevice(NewDeviceObject);
 331     }
 332
 333   DPRINT("NtfsMountVolume() done (Status: %lx)\n", Status);
 334
 335   return(Status);
 336 }
 337
 338
 339 static NTSTATUS
 340 NtfsVerifyVolume(PDEVICE_OBJECT DeviceObject,
 341                  PIRP Irp)
 342 {
 343 #if 0
 344   PDEVICE_OBJECT DeviceToVerify;
 345   PIO_STACK_LOCATION Stack;
 346   PUCHAR Buffer;
 347   ULONG Sector;
 348   ULONG i;
 349   NTSTATUS Status;
 350
 351   union
 352     {
 353       ULONG Value;
 354       UCHAR Part[4];
 355     } Serial;
 356 #endif
 357
 358   DPRINT1("NtfsVerifyVolume() called\n");
 359
 360 #if 0
 361   Stack = IoGetCurrentIrpStackLocation(Irp);
 362   DeviceToVerify = Stack->Parameters.VerifyVolume.DeviceObject;
 363
 364   DPRINT("Device object %p  Device to verify %p\n", DeviceObject, DeviceToVerify);
 365
 366   Sector = CDFS_PRIMARY_DESCRIPTOR_LOCATION;
 367
 368   Buffer = ExAllocatePool(NonPagedPool,
 369                           CDFS_BASIC_SECTOR);
 370   if (Buffer == NULL)
 371     {
 372       return(STATUS_INSUFFICIENT_RESOURCES);
 373     }
 374
 375   do
 376     {
 377       /* Read the Primary Volume Descriptor (PVD) */
 378       Status = CdfsReadRawSectors(DeviceToVerify,
 379                                   Sector,
 380                                   1,
 381                                   Buffer);
 382       DPRINT("CdfsReadRawSectors() status %lx\n", Status);
 383       if (!NT_SUCCESS(Status))
 384         {
 385           goto ByeBye;
 386         }
 387
 388       if (Buffer[0] == 1 &&
 389           Buffer[1] == 'C' &&
 390           Buffer[2] == 'D' &&
 391           Buffer[3] == '0' &&
 392           Buffer[4] == '0' &&
 393           Buffer[5] == '1')
 394         {
 395           break;
 396         }
 397
 398       Sector++;
 399     }
 400   while (Buffer[0] != 255);
 401
 402   if (Buffer[0] == 255)
 403     goto ByeBye;
 404
 405   Status = STATUS_WRONG_VOLUME;
 406
 407   /* Calculate the volume serial number */
 408   Serial.Value = 0;
 409   for (i = 0; i < 2048; i += 4)
 410     {
 411       /* DON'T optimize this to ULONG!!! (breaks overflow) */
 412       Serial.Part[0] += Buffer[i+3];
 413       Serial.Part[1] += Buffer[i+2];
 414       Serial.Part[2] += Buffer[i+1];
 415       Serial.Part[3] += Buffer[i+0];
 416     }
 417
 418   DPRINT("Current serial number %08lx  Vpb serial number %08lx\n",
 419           Serial.Value, DeviceToVerify->Vpb->SerialNumber);
 420
 421   if (Serial.Value == DeviceToVerify->Vpb->SerialNumber)
 422     Status = STATUS_SUCCESS;
 423
 424 ByeBye:
 425   ExFreePool(Buffer);
 426
 427   DPRINT("CdfsVerifyVolume() done (Status: %lx)\n", Status);
 428
 429   return(Status);
 430 #endif
 431   return(STATUS_UNSUCCESSFUL);
 432 }
 433
 434
 435 NTSTATUS STDCALL
 436 NtfsFileSystemControl(PDEVICE_OBJECT DeviceObject,
 437                       PIRP Irp)
 438 {
 439   PIO_STACK_LOCATION Stack;
 440   NTSTATUS Status;
 441
 442   DPRINT("NtfsFileSystemControl() called\n");
 443
 444   Stack = IoGetCurrentIrpStackLocation(Irp);
 445
 446   switch (Stack->MinorFunction)
 447     {
 448       case IRP_MN_USER_FS_REQUEST:
 449         DPRINT("NTFS: IRP_MN_USER_FS_REQUEST\n");
 450         Status = STATUS_INVALID_DEVICE_REQUEST;
 451         break;
 452
 453       case IRP_MN_MOUNT_VOLUME:
 454         DPRINT("NTFS: IRP_MN_MOUNT_VOLUME\n");
 455         Status = NtfsMountVolume(DeviceObject, Irp);
 456         break;
 457
 458       case IRP_MN_VERIFY_VOLUME:
 459         DPRINT1("NTFS: IRP_MN_VERIFY_VOLUME\n");
 460         Status = NtfsVerifyVolume(DeviceObject, Irp);
 461         break;
 462
 463       default:
 464         DPRINT("NTFS FSC: MinorFunction %d\n", Stack->MinorFunction);
 465         Status = STATUS_INVALID_DEVICE_REQUEST;
 466         break;
 467     }
 468
 469   Irp->IoStatus.Status = Status;
 470   Irp->IoStatus.Information = 0;
 471
 472   IoCompleteRequest(Irp, IO_NO_INCREMENT);
 473
 474   return(Status);
 475 }
 476
 477 /* EOF */