drivers/fs/vfat/volume.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:        See COPYING in the top level directory
   4  * PROJECT:          ReactOS kernel
   5  * FILE:             services/fs/vfat/volume.c
   6  * PURPOSE:          VFAT Filesystem
   7  * PROGRAMMER:       Jason Filby (jasonfilby@yahoo.com)
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ddk/ntddk.h>
  13 #include <wchar.h>
  14
  15 #define NDEBUG
  16 #include <debug.h>
  17
  18 #include "vfat.h"
  19
  20 /* FUNCTIONS ****************************************************************/
  21
  22 static NTSTATUS
  23 FsdGetFsVolumeInformation(PDEVICE_OBJECT DeviceObject,
  24                           PFILE_FS_VOLUME_INFORMATION FsVolumeInfo,
  25                           PULONG BufferLength)
  26 {
  27   ULONG LabelLength;
  28
  29   DPRINT("FsdGetFsVolumeInformation()\n");
  30   DPRINT("FsVolumeInfo = %p\n", FsVolumeInfo);
  31   DPRINT("BufferLength %lu\n", *BufferLength);
  32
  33   LabelLength = DeviceObject->Vpb->VolumeLabelLength;
  34
  35   DPRINT("Required length %lu\n", (sizeof(FILE_FS_VOLUME_INFORMATION) + LabelLength*sizeof(WCHAR)));
  36   DPRINT("LabelLength %lu\n", LabelLength);
  37   DPRINT("Label %S\n", DeviceObject->Vpb->VolumeLabel);
  38
  39   if (*BufferLength < sizeof(FILE_FS_VOLUME_INFORMATION))
  40     return STATUS_INFO_LENGTH_MISMATCH;
  41
  42   if (*BufferLength < (sizeof(FILE_FS_VOLUME_INFORMATION) + LabelLength*sizeof(WCHAR)))
  43     return STATUS_BUFFER_OVERFLOW;
  44
  45   /* valid entries */
  46   FsVolumeInfo->VolumeSerialNumber = DeviceObject->Vpb->SerialNumber;
  47   FsVolumeInfo->VolumeLabelLength = LabelLength * sizeof (WCHAR);
  48   wcscpy(FsVolumeInfo->VolumeLabel, DeviceObject->Vpb->VolumeLabel);
  49
  50   /* dummy entries */
  51   FsVolumeInfo->VolumeCreationTime.QuadPart = 0;
  52   FsVolumeInfo->SupportsObjects = FALSE;
  53
  54   DPRINT("Finished FsdGetFsVolumeInformation()\n");
  55
  56   *BufferLength -= (sizeof(FILE_FS_VOLUME_INFORMATION) + LabelLength * sizeof(WCHAR));
  57
  58   DPRINT("BufferLength %lu\n", *BufferLength);
  59
  60   return(STATUS_SUCCESS);
  61 }
  62
  63
  64 static NTSTATUS
  65 FsdGetFsAttributeInformation(PDEVICE_EXTENSION DeviceExt,
  66                              PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
  67                              PULONG BufferLength)
  68 {
  69   ULONG Length = DeviceExt->FatInfo.FatType == FAT32 ? 10 : 6;
  70
  71   DPRINT("FsdGetFsAttributeInformation()\n");
  72   DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
  73   DPRINT("BufferLength %lu\n", *BufferLength);
  74   DPRINT("Required length %lu\n", (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length));
  75
  76   if (*BufferLength < sizeof (FILE_FS_ATTRIBUTE_INFORMATION))
  77     return STATUS_INFO_LENGTH_MISMATCH;
  78
  79   if (*BufferLength < (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length))
  80     return STATUS_BUFFER_OVERFLOW;
  81
  82   FsAttributeInfo->FileSystemAttributes =
  83     FILE_CASE_PRESERVED_NAMES | FILE_UNICODE_ON_DISK;
  84   FsAttributeInfo->MaximumComponentNameLength = 255;
  85   FsAttributeInfo->FileSystemNameLength = Length;
  86   if (DeviceExt->FatInfo.FatType == FAT32)
  87   {
  88     memcpy(FsAttributeInfo->FileSystemName, L"FAT32", 10);
  89   }
  90   else
  91   {
  92     memcpy(FsAttributeInfo->FileSystemName, L"FAT", 6);
  93   }
  94
  95   DPRINT("Finished FsdGetFsAttributeInformation()\n");
  96
  97   *BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length);
  98   DPRINT("BufferLength %lu\n", *BufferLength);
  99
 100   return(STATUS_SUCCESS);
 101 }
 102
 103
 104 static NTSTATUS
 105 FsdGetFsSizeInformation(PDEVICE_OBJECT DeviceObject,
 106                         PFILE_FS_SIZE_INFORMATION FsSizeInfo,
 107                         PULONG BufferLength)
 108 {
 109   PDEVICE_EXTENSION DeviceExt;
 110   NTSTATUS Status;
 111
 112   DPRINT("FsdGetFsSizeInformation()\n");
 113   DPRINT("FsSizeInfo = %p\n", FsSizeInfo);
 114
 115   if (*BufferLength < sizeof(FILE_FS_SIZE_INFORMATION))
 116     return(STATUS_BUFFER_OVERFLOW);
 117
 118   DeviceExt = DeviceObject->DeviceExtension;
 119   Status = CountAvailableClusters(DeviceExt, &FsSizeInfo->AvailableAllocationUnits);
 120
 121   FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->FatInfo.NumberOfClusters;
 122   FsSizeInfo->SectorsPerAllocationUnit = DeviceExt->FatInfo.SectorsPerCluster;
 123   FsSizeInfo->BytesPerSector = DeviceExt->FatInfo.BytesPerSector;
 124
 125   DPRINT("Finished FsdGetFsSizeInformation()\n");
 126   if (NT_SUCCESS(Status))
 127     *BufferLength -= sizeof(FILE_FS_SIZE_INFORMATION);
 128
 129   return(Status);
 130 }
 131
 132
 133 static NTSTATUS
 134 FsdGetFsDeviceInformation(PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
 135                           PULONG BufferLength)
 136 {
 137   DPRINT("FsdGetFsDeviceInformation()\n");
 138   DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
 139   DPRINT("BufferLength %lu\n", *BufferLength);
 140   DPRINT("Required length %lu\n", sizeof(FILE_FS_DEVICE_INFORMATION));
 141
 142   if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
 143     return(STATUS_BUFFER_OVERFLOW);
 144
 145   FsDeviceInfo->DeviceType = FILE_DEVICE_DISK;
 146   FsDeviceInfo->Characteristics = 0; /* FIXME: fix this !! */
 147
 148   DPRINT("FsdGetFsDeviceInformation() finished.\n");
 149
 150   *BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION);
 151   DPRINT("BufferLength %lu\n", *BufferLength);
 152
 153   return(STATUS_SUCCESS);
 154 }
 155
 156
 157 static NTSTATUS
 158 FsdSetFsLabelInformation(PDEVICE_OBJECT DeviceObject,
 159                          PFILE_FS_LABEL_INFORMATION FsLabelInfo)
 160 {
 161   DPRINT("FsdSetFsLabelInformation()\n");
 162
 163   return(STATUS_NOT_IMPLEMENTED);
 164 }
 165
 166
 167 NTSTATUS VfatQueryVolumeInformation(PVFAT_IRP_CONTEXT IrpContext)
 168 /*
 169  * FUNCTION: Retrieve the specified volume information
 170  */
 171 {
 172   FS_INFORMATION_CLASS FsInformationClass;
 173   NTSTATUS RC = STATUS_SUCCESS;
 174   PVOID SystemBuffer;
 175   ULONG BufferLength;
 176
 177   /* PRECONDITION */
 178   assert(IrpContext);
 179
 180   DPRINT("VfatQueryVolumeInformation(IrpContext %x)\n", IrpContext);
 181
 182   if (!ExAcquireResourceSharedLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource, IrpContext->Flags & IRPCONTEXT_CANWAIT))
 183   {
 184      return VfatQueueRequest (IrpContext);
 185   }
 186
 187   /* INITIALIZATION */
 188   FsInformationClass = IrpContext->Stack->Parameters.QueryVolume.FsInformationClass;
 189   BufferLength = IrpContext->Stack->Parameters.QueryVolume.Length;
 190   SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
 191
 192
 193   DPRINT ("FsInformationClass %d\n", FsInformationClass);
 194   DPRINT ("SystemBuffer %x\n", SystemBuffer);
 195
 196   switch (FsInformationClass)
 197     {
 198     case FileFsVolumeInformation:
 199       RC = FsdGetFsVolumeInformation(IrpContext->DeviceObject,
 200                                      SystemBuffer,
 201                                      &BufferLength);
 202       break;
 203
 204     case FileFsAttributeInformation:
 205       RC = FsdGetFsAttributeInformation(IrpContext->DeviceObject->DeviceExtension,
 206                                         SystemBuffer,
 207                                         &BufferLength);
 208       break;
 209
 210     case FileFsSizeInformation:
 211       RC = FsdGetFsSizeInformation(IrpContext->DeviceObject,
 212                                    SystemBuffer,
 213                                    &BufferLength);
 214       break;
 215
 216     case FileFsDeviceInformation:
 217       RC = FsdGetFsDeviceInformation(SystemBuffer,
 218                                      &BufferLength);
 219       break;
 220
 221     default:
 222       RC = STATUS_NOT_SUPPORTED;
 223     }
 224
 225   ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
 226   IrpContext->Irp->IoStatus.Status = RC;
 227   if (NT_SUCCESS(RC))
 228     IrpContext->Irp->IoStatus.Information =
 229       IrpContext->Stack->Parameters.QueryVolume.Length - BufferLength;
 230   else
 231     IrpContext->Irp->IoStatus.Information = 0;
 232   IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
 233   VfatFreeIrpContext(IrpContext);
 234
 235   return RC;
 236 }
 237
 238
 239 NTSTATUS VfatSetVolumeInformation(PVFAT_IRP_CONTEXT IrpContext)
 240 /*
 241  * FUNCTION: Set the specified volume information
 242  */
 243 {
 244   FS_INFORMATION_CLASS FsInformationClass;
 245   NTSTATUS Status = STATUS_SUCCESS;
 246   PVOID SystemBuffer;
 247   ULONG BufferLength;
 248
 249   /* PRECONDITION */
 250   assert(IrpContext);
 251
 252   DPRINT1("VfatSetVolumeInformation(IrpContext %x)\n", IrpContext);
 253
 254   if (!ExAcquireResourceExclusiveLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource, IrpContext->Flags & IRPCONTEXT_CANWAIT))
 255   {
 256      return VfatQueueRequest (IrpContext);
 257   }
 258
 259   FsInformationClass = IrpContext->Stack->Parameters.SetVolume.FsInformationClass;
 260   BufferLength = IrpContext->Stack->Parameters.SetVolume.Length;
 261   SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
 262
 263   DPRINT1("FsInformationClass %d\n", FsInformationClass);
 264   DPRINT1("BufferLength %d\n", BufferLength);
 265   DPRINT1("SystemBuffer %x\n", SystemBuffer);
 266
 267   switch(FsInformationClass)
 268     {
 269     case FileFsLabelInformation:
 270       Status = FsdSetFsLabelInformation(IrpContext->DeviceObject,
 271                                         SystemBuffer);
 272       break;
 273
 274     default:
 275       Status = STATUS_NOT_SUPPORTED;
 276     }
 277
 278   ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
 279   IrpContext->Irp->IoStatus.Status = Status;
 280   IrpContext->Irp->IoStatus.Information = 0;
 281   IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
 282   VfatFreeIrpContext(IrpContext);
 283
 284   return(Status);
 285 }
 286
 287 /* EOF */