mirror of
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2b82fe44ea
- Create a branch to drop my ndisuio work svn path=/branches/wlan-bringup/; revision=54809
432 lines
13 KiB
C
432 lines
13 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/fs/vfat/volume.c
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* PURPOSE: VFAT Filesystem
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* PROGRAMMER: Jason Filby (jasonfilby@yahoo.com)
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* Herve Poussineau (reactos@poussine.freesurf.fr)
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*/
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/* INCLUDES *****************************************************************/
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#define NDEBUG
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#include "vfat.h"
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/* FUNCTIONS ****************************************************************/
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static NTSTATUS
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FsdGetFsVolumeInformation(PDEVICE_OBJECT DeviceObject,
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PFILE_FS_VOLUME_INFORMATION FsVolumeInfo,
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PULONG BufferLength)
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{
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DPRINT("FsdGetFsVolumeInformation()\n");
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DPRINT("FsVolumeInfo = %p\n", FsVolumeInfo);
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DPRINT("BufferLength %lu\n", *BufferLength);
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DPRINT("Required length %lu\n", (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength));
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DPRINT("LabelLength %hu\n", DeviceObject->Vpb->VolumeLabelLength);
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DPRINT("Label %*.S\n", DeviceObject->Vpb->VolumeLabelLength / sizeof(WCHAR), DeviceObject->Vpb->VolumeLabel);
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if (*BufferLength < sizeof(FILE_FS_VOLUME_INFORMATION))
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return STATUS_INFO_LENGTH_MISMATCH;
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if (*BufferLength < (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength))
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return STATUS_BUFFER_OVERFLOW;
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/* valid entries */
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FsVolumeInfo->VolumeSerialNumber = DeviceObject->Vpb->SerialNumber;
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FsVolumeInfo->VolumeLabelLength = DeviceObject->Vpb->VolumeLabelLength;
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RtlCopyMemory(FsVolumeInfo->VolumeLabel, DeviceObject->Vpb->VolumeLabel, FsVolumeInfo->VolumeLabelLength);
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/* dummy entries */
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FsVolumeInfo->VolumeCreationTime.QuadPart = 0;
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FsVolumeInfo->SupportsObjects = FALSE;
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DPRINT("Finished FsdGetFsVolumeInformation()\n");
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*BufferLength -= (sizeof(FILE_FS_VOLUME_INFORMATION) + DeviceObject->Vpb->VolumeLabelLength);
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DPRINT("BufferLength %lu\n", *BufferLength);
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return(STATUS_SUCCESS);
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}
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static NTSTATUS
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FsdGetFsAttributeInformation(PDEVICE_EXTENSION DeviceExt,
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PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
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PULONG BufferLength)
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{
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PCWSTR pName; ULONG Length;
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DPRINT("FsdGetFsAttributeInformation()\n");
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DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
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DPRINT("BufferLength %lu\n", *BufferLength);
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if (*BufferLength < sizeof (FILE_FS_ATTRIBUTE_INFORMATION))
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return STATUS_INFO_LENGTH_MISMATCH;
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if (DeviceExt->FatInfo.FatType == FAT32)
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{
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Length = 10;
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pName = L"FAT32";
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}
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else
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{
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Length = 6;
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pName = L"FAT";
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}
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DPRINT("Required length %lu\n", (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length));
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if (*BufferLength < (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length))
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return STATUS_BUFFER_OVERFLOW;
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FsAttributeInfo->FileSystemAttributes =
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FILE_CASE_PRESERVED_NAMES | FILE_UNICODE_ON_DISK;
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FsAttributeInfo->MaximumComponentNameLength = 255;
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FsAttributeInfo->FileSystemNameLength = Length;
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RtlCopyMemory(FsAttributeInfo->FileSystemName, pName, Length );
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DPRINT("Finished FsdGetFsAttributeInformation()\n");
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*BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + Length);
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DPRINT("BufferLength %lu\n", *BufferLength);
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return(STATUS_SUCCESS);
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}
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static NTSTATUS
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FsdGetFsSizeInformation(PDEVICE_OBJECT DeviceObject,
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PFILE_FS_SIZE_INFORMATION FsSizeInfo,
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PULONG BufferLength)
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{
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PDEVICE_EXTENSION DeviceExt;
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NTSTATUS Status;
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DPRINT("FsdGetFsSizeInformation()\n");
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DPRINT("FsSizeInfo = %p\n", FsSizeInfo);
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if (*BufferLength < sizeof(FILE_FS_SIZE_INFORMATION))
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return(STATUS_BUFFER_OVERFLOW);
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DeviceExt = DeviceObject->DeviceExtension;
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Status = CountAvailableClusters(DeviceExt, &FsSizeInfo->AvailableAllocationUnits);
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FsSizeInfo->TotalAllocationUnits.QuadPart = DeviceExt->FatInfo.NumberOfClusters;
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FsSizeInfo->SectorsPerAllocationUnit = DeviceExt->FatInfo.SectorsPerCluster;
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FsSizeInfo->BytesPerSector = DeviceExt->FatInfo.BytesPerSector;
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DPRINT("Finished FsdGetFsSizeInformation()\n");
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if (NT_SUCCESS(Status))
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*BufferLength -= sizeof(FILE_FS_SIZE_INFORMATION);
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return(Status);
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}
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static NTSTATUS
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FsdGetFsDeviceInformation
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(
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PDEVICE_OBJECT DeviceObject,
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PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
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PULONG BufferLength
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)
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{
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DPRINT("FsdGetFsDeviceInformation()\n");
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DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
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DPRINT("BufferLength %lu\n", *BufferLength);
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DPRINT("Required length %lu\n", sizeof(FILE_FS_DEVICE_INFORMATION));
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if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
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return(STATUS_BUFFER_OVERFLOW);
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FsDeviceInfo->DeviceType = FILE_DEVICE_DISK;
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FsDeviceInfo->Characteristics = DeviceObject->Characteristics;
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DPRINT("FsdGetFsDeviceInformation() finished.\n");
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*BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION);
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DPRINT("BufferLength %lu\n", *BufferLength);
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return(STATUS_SUCCESS);
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}
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static NTSTATUS
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FsdSetFsLabelInformation(PDEVICE_OBJECT DeviceObject,
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PFILE_FS_LABEL_INFORMATION FsLabelInfo)
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{
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PDEVICE_EXTENSION DeviceExt;
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PVOID Context = NULL;
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ULONG DirIndex = 0;
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PDIR_ENTRY Entry;
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PVFATFCB pRootFcb;
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LARGE_INTEGER FileOffset;
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BOOLEAN LabelFound = FALSE;
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DIR_ENTRY VolumeLabelDirEntry;
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ULONG VolumeLabelDirIndex;
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ULONG LabelLen;
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NTSTATUS Status = STATUS_UNSUCCESSFUL;
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OEM_STRING StringO;
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UNICODE_STRING StringW;
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CHAR cString[43];
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ULONG SizeDirEntry;
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ULONG EntriesPerPage;
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DPRINT("FsdSetFsLabelInformation()\n");
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DeviceExt = (PDEVICE_EXTENSION)DeviceObject->DeviceExtension;
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if (sizeof(DeviceObject->Vpb->VolumeLabel) < FsLabelInfo->VolumeLabelLength)
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{
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return STATUS_NAME_TOO_LONG;
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}
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if (DeviceExt->Flags & VCB_IS_FATX)
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{
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if (FsLabelInfo->VolumeLabelLength / sizeof(WCHAR) > 42)
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return STATUS_NAME_TOO_LONG;
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SizeDirEntry = sizeof(FATX_DIR_ENTRY);
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EntriesPerPage = FATX_ENTRIES_PER_PAGE;
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}
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else
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{
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if (FsLabelInfo->VolumeLabelLength / sizeof(WCHAR) > 11)
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return STATUS_NAME_TOO_LONG;
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SizeDirEntry = sizeof(FAT_DIR_ENTRY);
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EntriesPerPage = FAT_ENTRIES_PER_PAGE;
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}
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/* Create Volume label dir entry */
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LabelLen = FsLabelInfo->VolumeLabelLength / sizeof(WCHAR);
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RtlZeroMemory(&VolumeLabelDirEntry, SizeDirEntry);
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StringW.Buffer = FsLabelInfo->VolumeLabel;
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StringW.Length = StringW.MaximumLength = (USHORT)FsLabelInfo->VolumeLabelLength;
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StringO.Buffer = cString;
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StringO.Length = 0;
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StringO.MaximumLength = 42;
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Status = RtlUnicodeStringToOemString(&StringO, &StringW, FALSE);
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if (!NT_SUCCESS(Status))
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return Status;
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if (DeviceExt->Flags & VCB_IS_FATX)
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{
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RtlCopyMemory(VolumeLabelDirEntry.FatX.Filename, cString, LabelLen);
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memset(&VolumeLabelDirEntry.FatX.Filename[LabelLen], ' ', 42 - LabelLen);
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VolumeLabelDirEntry.FatX.Attrib = _A_VOLID;
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}
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else
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{
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RtlCopyMemory(VolumeLabelDirEntry.Fat.Filename, cString, max(sizeof(VolumeLabelDirEntry.Fat.Filename), LabelLen));
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if (LabelLen > sizeof(VolumeLabelDirEntry.Fat.Filename))
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{
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memset(VolumeLabelDirEntry.Fat.Ext, ' ', sizeof(VolumeLabelDirEntry.Fat.Ext));
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RtlCopyMemory(VolumeLabelDirEntry.Fat.Ext, cString + sizeof(VolumeLabelDirEntry.Fat.Filename), LabelLen - sizeof(VolumeLabelDirEntry.Fat.Filename));
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}
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else
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{
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memset(&VolumeLabelDirEntry.Fat.Filename[LabelLen], ' ', sizeof(VolumeLabelDirEntry.Fat.Filename) - LabelLen);
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}
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VolumeLabelDirEntry.Fat.Attrib = _A_VOLID;
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}
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pRootFcb = vfatOpenRootFCB(DeviceExt);
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/* Search existing volume entry on disk */
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FileOffset.QuadPart = 0;
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if (CcPinRead(pRootFcb->FileObject, &FileOffset, SizeDirEntry, TRUE, &Context, (PVOID*)&Entry))
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{
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while (TRUE)
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{
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if (ENTRY_VOLUME(DeviceExt, Entry))
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{
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/* Update entry */
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LabelFound = TRUE;
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RtlCopyMemory(Entry, &VolumeLabelDirEntry, SizeDirEntry);
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CcSetDirtyPinnedData(Context, NULL);
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Status = STATUS_SUCCESS;
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break;
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}
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if (ENTRY_END(DeviceExt, Entry))
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{
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break;
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}
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DirIndex++;
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Entry = (PDIR_ENTRY)((ULONG_PTR)Entry + SizeDirEntry);
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if ((DirIndex % EntriesPerPage) == 0)
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{
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CcUnpinData(Context);
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FileOffset.u.LowPart += PAGE_SIZE;
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if (!CcPinRead(pRootFcb->FileObject, &FileOffset, SizeDirEntry, TRUE, &Context, (PVOID*)&Entry))
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{
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Context = NULL;
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break;
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}
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}
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}
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if (Context)
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{
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CcUnpinData(Context);
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}
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}
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if (!LabelFound)
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{
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/* Add new entry for label */
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if (!vfatFindDirSpace(DeviceExt, pRootFcb, 1, &VolumeLabelDirIndex))
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Status = STATUS_DISK_FULL;
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else
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{
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FileOffset.u.HighPart = 0;
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FileOffset.u.LowPart = VolumeLabelDirIndex * SizeDirEntry;
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CcPinRead(pRootFcb->FileObject, &FileOffset, SizeDirEntry,
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TRUE, &Context, (PVOID*)&Entry);
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RtlCopyMemory(Entry, &VolumeLabelDirEntry, SizeDirEntry);
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CcSetDirtyPinnedData(Context, NULL);
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CcUnpinData(Context);
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Status = STATUS_SUCCESS;
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}
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}
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vfatReleaseFCB(DeviceExt, pRootFcb);
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if (!NT_SUCCESS(Status))
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{
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return Status;
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}
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/* Update volume label in memory */
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DeviceObject->Vpb->VolumeLabelLength = (USHORT)FsLabelInfo->VolumeLabelLength;
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RtlCopyMemory(DeviceObject->Vpb->VolumeLabel, FsLabelInfo->VolumeLabel, DeviceObject->Vpb->VolumeLabelLength);
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return Status;
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}
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NTSTATUS VfatQueryVolumeInformation(PVFAT_IRP_CONTEXT IrpContext)
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/*
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* FUNCTION: Retrieve the specified volume information
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*/
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{
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FS_INFORMATION_CLASS FsInformationClass;
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NTSTATUS RC = STATUS_SUCCESS;
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PVOID SystemBuffer;
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ULONG BufferLength;
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/* PRECONDITION */
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ASSERT(IrpContext);
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DPRINT("VfatQueryVolumeInformation(IrpContext %p)\n", IrpContext);
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if (!ExAcquireResourceSharedLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
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(BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
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{
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return VfatQueueRequest (IrpContext);
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}
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/* INITIALIZATION */
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FsInformationClass = IrpContext->Stack->Parameters.QueryVolume.FsInformationClass;
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BufferLength = IrpContext->Stack->Parameters.QueryVolume.Length;
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SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
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DPRINT ("FsInformationClass %d\n", FsInformationClass);
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DPRINT ("SystemBuffer %p\n", SystemBuffer);
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switch (FsInformationClass)
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{
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case FileFsVolumeInformation:
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RC = FsdGetFsVolumeInformation(IrpContext->DeviceObject,
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SystemBuffer,
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&BufferLength);
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break;
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case FileFsAttributeInformation:
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RC = FsdGetFsAttributeInformation(IrpContext->DeviceObject->DeviceExtension,
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SystemBuffer,
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&BufferLength);
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break;
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case FileFsSizeInformation:
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RC = FsdGetFsSizeInformation(IrpContext->DeviceObject,
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SystemBuffer,
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&BufferLength);
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break;
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case FileFsDeviceInformation:
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RC = FsdGetFsDeviceInformation(IrpContext->DeviceObject,
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SystemBuffer,
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&BufferLength);
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break;
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default:
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RC = STATUS_NOT_SUPPORTED;
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}
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ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
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IrpContext->Irp->IoStatus.Status = RC;
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if (NT_SUCCESS(RC))
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IrpContext->Irp->IoStatus.Information =
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IrpContext->Stack->Parameters.QueryVolume.Length - BufferLength;
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else
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IrpContext->Irp->IoStatus.Information = 0;
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IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
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VfatFreeIrpContext(IrpContext);
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return RC;
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}
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NTSTATUS VfatSetVolumeInformation(PVFAT_IRP_CONTEXT IrpContext)
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/*
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* FUNCTION: Set the specified volume information
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*/
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{
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FS_INFORMATION_CLASS FsInformationClass;
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NTSTATUS Status = STATUS_SUCCESS;
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PVOID SystemBuffer;
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ULONG BufferLength;
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PIO_STACK_LOCATION Stack = IrpContext->Stack;
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/* PRECONDITION */
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ASSERT(IrpContext);
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DPRINT ("VfatSetVolumeInformation(IrpContext %p)\n", IrpContext);
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if (!ExAcquireResourceExclusiveLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource,
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(BOOLEAN)(IrpContext->Flags & IRPCONTEXT_CANWAIT)))
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{
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return VfatQueueRequest (IrpContext);
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}
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FsInformationClass = Stack->Parameters.SetVolume.FsInformationClass;
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BufferLength = Stack->Parameters.SetVolume.Length;
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SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
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DPRINT ("FsInformationClass %d\n", FsInformationClass);
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DPRINT ("BufferLength %d\n", BufferLength);
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DPRINT ("SystemBuffer %p\n", SystemBuffer);
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switch(FsInformationClass)
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{
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case FileFsLabelInformation:
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Status = FsdSetFsLabelInformation(IrpContext->DeviceObject,
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SystemBuffer);
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break;
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default:
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Status = STATUS_NOT_SUPPORTED;
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}
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ExReleaseResourceLite(&((PDEVICE_EXTENSION)IrpContext->DeviceObject->DeviceExtension)->DirResource);
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IrpContext->Irp->IoStatus.Status = Status;
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IrpContext->Irp->IoStatus.Information = 0;
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IoCompleteRequest(IrpContext->Irp, IO_NO_INCREMENT);
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VfatFreeIrpContext(IrpContext);
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return(Status);
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}
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/* EOF */
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