NTSTATUS
Ext2FlushFiles(
IN PEXT2_IRP_CONTEXT IrpContext,
IN PEXT2_VCB Vcb,
IN BOOLEAN bShutDown
)
{
IO_STATUS_BLOCK IoStatus;
PEXT2_FCB Fcb;
PLIST_ENTRY ListEntry;
if (IsVcbReadOnly(Vcb)) {
return STATUS_SUCCESS;
}
IoStatus.Status = STATUS_SUCCESS;
DEBUG(DL_INF, ( "Flushing Files ...\n"));
// Flush all Fcbs in Vcb list queue.
for (ListEntry = Vcb->FcbList.Flink;
ListEntry != &Vcb->FcbList;
ListEntry = ListEntry->Flink ) {
Fcb = CONTAINING_RECORD(ListEntry, EXT2_FCB, Next);
ExAcquireResourceExclusiveLite(
&Fcb->MainResource, TRUE);
IoStatus.Status = Ext2FlushFile(IrpContext, Fcb, NULL);
ExReleaseResourceLite(&Fcb->MainResource);
}
return IoStatus.Status;
}
FAST_IO_POSSIBLE
Ext2IsFastIoPossible(
IN PEXT2_FCB Fcb
)
{
FAST_IO_POSSIBLE IsPossible = FastIoIsNotPossible;
if (!Fcb || !FsRtlOplockIsFastIoPossible(&Fcb->Oplock))
return IsPossible;
IsPossible = FastIoIsQuestionable;
if (!FsRtlAreThereCurrentFileLocks(&Fcb->FileLockAnchor)) {
if (!IsVcbReadOnly(Fcb->Vcb) && !FlagOn(Fcb->Vcb->Flags, VCB_VOLUME_LOCKED)) {
IsPossible = FastIoIsPossible;
}
}
return IsPossible;
}
INT
Ext2CheckJournal(
PEXT2_VCB Vcb,
PULONG jNo
)
{
struct ext3_super_block* esb = NULL;
/* check ext3 super block */
esb = (struct ext3_super_block *)Vcb->SuperBlock;
if (IsFlagOn(esb->s_feature_incompat,
EXT3_FEATURE_INCOMPAT_RECOVER)) {
SetLongFlag(Vcb->Flags, VCB_JOURNAL_RECOVER);
}
/* must stop here if volume is read-only */
if (IsVcbReadOnly(Vcb)) {
goto errorout;
}
/* journal is external ? */
if (esb->s_journal_inum == 0) {
goto errorout;
}
/* oops: volume is corrupted */
if (esb->s_journal_dev) {
goto errorout;
}
/* return the journal inode number */
*jNo = esb->s_journal_inum;
return TRUE;
errorout:
return FALSE;
}
NTSTATUS
Ext2Write (IN PEXT2_IRP_CONTEXT IrpContext)
{
NTSTATUS Status;
PEXT2_FCBVCB FcbOrVcb;
PDEVICE_OBJECT DeviceObject;
PFILE_OBJECT FileObject;
PEXT2_VCB Vcb;
BOOLEAN bCompleteRequest = TRUE;
ASSERT(IrpContext);
ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
(IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
__try {
if (IsFlagOn(IrpContext->MinorFunction, IRP_MN_COMPLETE)) {
Status = Ext2WriteComplete(IrpContext);
bCompleteRequest = FALSE;
} else {
DeviceObject = IrpContext->DeviceObject;
if (IsExt2FsDevice(DeviceObject)) {
Status = STATUS_INVALID_DEVICE_REQUEST;
__leave;
}
FileObject = IrpContext->FileObject;
Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
if (Vcb->Identifier.Type != EXT2VCB ||
Vcb->Identifier.Size != sizeof(EXT2_VCB) ) {
Status = STATUS_INVALID_PARAMETER;
__leave;
}
if (IsVcbReadOnly(Vcb)) {
Status = STATUS_MEDIA_WRITE_PROTECTED;
__leave;
}
if (FlagOn(Vcb->Flags, VCB_VOLUME_LOCKED) &&
Vcb->LockFile != FileObject ) {
Status = STATUS_ACCESS_DENIED;
__leave;
}
FcbOrVcb = (PEXT2_FCBVCB) FileObject->FsContext;
if (FcbOrVcb->Identifier.Type == EXT2VCB) {
Status = Ext2WriteVolume(IrpContext);
if (!NT_SUCCESS(Status)) {
DbgBreak();
}
bCompleteRequest = FALSE;
} else if (FcbOrVcb->Identifier.Type == EXT2FCB) {
if (IsFlagOn(Vcb->Flags, VCB_DISMOUNT_PENDING)) {
Status = STATUS_TOO_LATE;
__leave;
}
Status = Ext2WriteFile(IrpContext);
if (!NT_SUCCESS(Status)) {
DbgBreak();
}
bCompleteRequest = FALSE;
} else {
Status = STATUS_INVALID_PARAMETER;
}
}
} __finally {
if (bCompleteRequest) {
Ext2CompleteIrpContext(IrpContext, Status);
}
}
return Status;
}
BOOLEAN
Ext2FastIoCheckIfPossible (
IN PFILE_OBJECT FileObject,
IN PLARGE_INTEGER FileOffset,
IN ULONG Length,
IN BOOLEAN Wait,
IN ULONG LockKey,
IN BOOLEAN CheckForReadOperation,
OUT PIO_STATUS_BLOCK IoStatus,
IN PDEVICE_OBJECT DeviceObject
)
{
BOOLEAN bPossible = FastIoIsNotPossible;
PEXT2_FCB Fcb;
PEXT2_CCB Ccb;
LARGE_INTEGER lLength;
lLength.QuadPart = Length;
__try {
FsRtlEnterFileSystem();
__try {
if (IsExt2FsDevice(DeviceObject)) {
__leave;
}
Fcb = (PEXT2_FCB) FileObject->FsContext;
if (Fcb == NULL || Fcb->Identifier.Type == EXT2VCB) {
__leave;
}
ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
(Fcb->Identifier.Size == sizeof(EXT2_FCB)));
if (IsDirectory(Fcb)) {
__leave;
}
Ccb = (PEXT2_CCB) FileObject->FsContext2;
if (Ccb == NULL) {
__leave;
}
if (CheckForReadOperation) {
bPossible = FsRtlFastCheckLockForRead(
&Fcb->FileLockAnchor,
FileOffset,
&lLength,
LockKey,
FileObject,
PsGetCurrentProcess());
} else {
if (!IsVcbReadOnly(Fcb->Vcb)) {
bPossible = FsRtlFastCheckLockForWrite(
&Fcb->FileLockAnchor,
FileOffset,
&lLength,
LockKey,
FileObject,
PsGetCurrentProcess());
}
}
#if EXT2_DEBUG
DEBUG(DL_INF, ("Ext2FastIIOCheckPossible: %s %s %wZ\n",
Ext2GetCurrentProcessName(),
"FASTIO_CHECK_IF_POSSIBLE",
&Fcb->Mcb->FullName
));
DEBUG(DL_INF, (
"Ext2FastIIOCheckPossible: Offset: %I64xg Length: %xh Key: %u %s %s\n",
FileOffset->QuadPart,
Length,
LockKey,
(CheckForReadOperation ? "CheckForReadOperation:" :
"CheckForWriteOperation:"),
(bPossible ? "Succeeded" : "Failed")));
#endif
} __except (EXCEPTION_EXECUTE_HANDLER) {
bPossible = FastIoIsNotPossible;
}
} __finally {
FsRtlExitFileSystem();
}
return bPossible;
}
BOOLEAN
Ext2FastIoWrite (
IN PFILE_OBJECT FileObject,
IN PLARGE_INTEGER FileOffset,
IN ULONG Length,
IN BOOLEAN Wait,
IN ULONG LockKey,
OUT PVOID Buffer,
OUT PIO_STATUS_BLOCK IoStatus,
IN PDEVICE_OBJECT DeviceObject)
{
PEXT2_FCB Fcb = NULL;
BOOLEAN Status = FALSE;
BOOLEAN Locked = FALSE;
Fcb = (PEXT2_FCB) FileObject->FsContext;
if (Fcb == NULL)
return FALSE;
__try {
FsRtlEnterFileSystem();
ASSERT((Fcb->Identifier.Type == EXT2FCB) &&
(Fcb->Identifier.Size == sizeof(EXT2_FCB)));
if (IsVcbReadOnly(Fcb->Vcb)) {
__leave;
}
if (!ExAcquireResourceSharedLite(Fcb->Header.Resource, Wait)) {
__leave;
}
Locked = TRUE;
if (IsWritingToEof(*FileOffset) ||
Fcb->Header.ValidDataLength.QuadPart < FileOffset->QuadPart + Length ||
Fcb->Header.FileSize.QuadPart < FileOffset->QuadPart + Length ) {
Status = FALSE;
__leave;
}
if (Locked) {
ExReleaseResourceLite(Fcb->Header.Resource);
Locked = FALSE;
}
Status = FsRtlCopyWrite(FileObject, FileOffset, Length, Wait,
LockKey, Buffer, IoStatus, DeviceObject);
if (Status) {
if (IoStatus)
Length = (ULONG)IoStatus->Information;
}
} __finally {
if (Locked) {
ExReleaseResourceLite(Fcb->Header.Resource);
}
FsRtlExitFileSystem();
}
DEBUG(DL_IO, ("Ext2FastIoWrite: %wZ Offset: %I64xh Length: %xh Key: %xh Status=%d\n",
&Fcb->Mcb->ShortName, FileOffset->QuadPart, Length, LockKey, Status));
return Status;
}
NTSTATUS
Ext2Flush (IN PEXT2_IRP_CONTEXT IrpContext)
{
NTSTATUS Status = STATUS_SUCCESS;
PIRP Irp = NULL;
PIO_STACK_LOCATION IrpSp = NULL;
PEXT2_VCB Vcb = NULL;
PEXT2_FCB Fcb = NULL;
PEXT2_FCBVCB FcbOrVcb = NULL;
PEXT2_CCB Ccb = NULL;
PFILE_OBJECT FileObject = NULL;
PDEVICE_OBJECT DeviceObject = NULL;
BOOLEAN MainResourceAcquired = FALSE;
_SEH2_TRY {
ASSERT(IrpContext);
ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
(IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
DeviceObject = IrpContext->DeviceObject;
//
// This request is not allowed on the main device object
//
if (IsExt2FsDevice(DeviceObject)) {
Status = STATUS_INVALID_DEVICE_REQUEST;
_SEH2_LEAVE;
}
Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
ASSERT(Vcb != NULL);
ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
(Vcb->Identifier.Size == sizeof(EXT2_VCB)));
ASSERT(IsMounted(Vcb));
if (IsVcbReadOnly(Vcb)) {
Status = STATUS_SUCCESS;
_SEH2_LEAVE;
}
Irp = IrpContext->Irp;
IrpSp = IoGetCurrentIrpStackLocation(Irp);
FileObject = IrpContext->FileObject;
FcbOrVcb = (PEXT2_FCBVCB) FileObject->FsContext;
ASSERT(FcbOrVcb != NULL);
Ccb = (PEXT2_CCB) FileObject->FsContext2;
if (Ccb == NULL) {
Status = STATUS_SUCCESS;
_SEH2_LEAVE;
}
MainResourceAcquired =
ExAcquireResourceExclusiveLite(&FcbOrVcb->MainResource, TRUE);
ASSERT(MainResourceAcquired);
DEBUG(DL_INF, ("Ext2Flush-pre: total mcb records=%u\n",
FsRtlNumberOfRunsInLargeMcb(&Vcb->Extents)));
if (FcbOrVcb->Identifier.Type == EXT2VCB) {
Ext2VerifyVcb(IrpContext, Vcb);
Status = Ext2FlushFiles(IrpContext, (PEXT2_VCB)(FcbOrVcb), FALSE);
if (NT_SUCCESS(Status)) {
_SEH2_LEAVE;
}
Status = Ext2FlushVolume(IrpContext, (PEXT2_VCB)(FcbOrVcb), FALSE);
if (NT_SUCCESS(Status) && IsFlagOn(Vcb->Volume->Flags, FO_FILE_MODIFIED)) {
ClearFlag(Vcb->Volume->Flags, FO_FILE_MODIFIED);
}
} else if (FcbOrVcb->Identifier.Type == EXT2FCB) {
Fcb = (PEXT2_FCB)(FcbOrVcb);
Status = Ext2FlushFile(IrpContext, Fcb, Ccb);
if (NT_SUCCESS(Status)) {
if (IsFlagOn(FileObject->Flags, FO_FILE_MODIFIED)) {
Fcb->Mcb->FileAttr |= FILE_ATTRIBUTE_ARCHIVE;
ClearFlag(FileObject->Flags, FO_FILE_MODIFIED);
}
}
}
DEBUG(DL_INF, ("Ext2Flush-post: total mcb records=%u\n",
FsRtlNumberOfRunsInLargeMcb(&Vcb->Extents)));
} _SEH2_FINALLY {
if (MainResourceAcquired) {
ExReleaseResourceLite(&FcbOrVcb->MainResource);
}
if (!IrpContext->ExceptionInProgress) {
if (Vcb && Irp && IrpSp && !IsVcbReadOnly(Vcb)) {
// Call the disk driver to flush the physial media.
NTSTATUS DriverStatus;
PIO_STACK_LOCATION NextIrpSp;
NextIrpSp = IoGetNextIrpStackLocation(Irp);
*NextIrpSp = *IrpSp;
IoSetCompletionRoutine( Irp,
Ext2FlushCompletionRoutine,
NULL,
TRUE,
TRUE,
TRUE );
DriverStatus = IoCallDriver(Vcb->TargetDeviceObject, Irp);
Status = (DriverStatus == STATUS_INVALID_DEVICE_REQUEST) ?
Status : DriverStatus;
IrpContext->Irp = Irp = NULL;
}
Ext2CompleteIrpContext(IrpContext, Status);
}
} _SEH2_END;
return Status;
}
NTSTATUS
Ext2SetVolumeInformation (IN PEXT2_IRP_CONTEXT IrpContext)
{
PDEVICE_OBJECT DeviceObject;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
PEXT2_VCB Vcb = NULL;
PIRP Irp;
PIO_STACK_LOCATION IoStackLocation;
FS_INFORMATION_CLASS FsInformationClass;
BOOLEAN VcbResourceAcquired = FALSE;
__try {
ASSERT(IrpContext != NULL);
ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
(IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
DeviceObject = IrpContext->DeviceObject;
//
// This request is not allowed on the main device object
//
if (IsExt2FsDevice(DeviceObject)) {
Status = STATUS_INVALID_DEVICE_REQUEST;
__leave;
}
Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
ASSERT(Vcb != NULL);
ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
(Vcb->Identifier.Size == sizeof(EXT2_VCB)));
ASSERT(IsMounted(Vcb));
if (IsVcbReadOnly(Vcb)) {
Status = STATUS_MEDIA_WRITE_PROTECTED;
__leave;
}
if (!ExAcquireResourceExclusiveLite(
&Vcb->MainResource, TRUE)) {
Status = STATUS_PENDING;
__leave;
}
VcbResourceAcquired = TRUE;
Ext2VerifyVcb(IrpContext, Vcb);
Irp = IrpContext->Irp;
IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
//Notes: SetVolume is not defined in ntddk.h of win2k ddk,
// But it's same to QueryVolume ....
FsInformationClass =
IoStackLocation->Parameters./*SetVolume*/QueryVolume.FsInformationClass;
switch (FsInformationClass) {
case FileFsLabelInformation:
{
PFILE_FS_LABEL_INFORMATION VolLabelInfo = NULL;
ULONG VolLabelLen;
UNICODE_STRING LabelName ;
OEM_STRING OemName;
VolLabelInfo = (PFILE_FS_LABEL_INFORMATION) Irp->AssociatedIrp.SystemBuffer;
VolLabelLen = VolLabelInfo->VolumeLabelLength;
if (VolLabelLen > (16 * sizeof(WCHAR))) {
Status = STATUS_INVALID_VOLUME_LABEL;
__leave;
}
RtlCopyMemory( Vcb->Vpb->VolumeLabel,
VolLabelInfo->VolumeLabel,
VolLabelLen );
RtlZeroMemory(Vcb->SuperBlock->s_volume_name, 16);
LabelName.Buffer = VolLabelInfo->VolumeLabel;
LabelName.MaximumLength = (USHORT)16 * sizeof(WCHAR);
LabelName.Length = (USHORT)VolLabelLen;
OemName.Buffer = SUPER_BLOCK->s_volume_name;
OemName.Length = 0;
OemName.MaximumLength = 16;
Ext2UnicodeToOEM(Vcb, &OemName, &LabelName);
Vcb->Vpb->VolumeLabelLength = (USHORT) VolLabelLen;
if (Ext2SaveSuper(IrpContext, Vcb)) {
Status = STATUS_SUCCESS;
}
Irp->IoStatus.Information = 0;
}
break;
default:
Status = STATUS_INVALID_INFO_CLASS;
}
} __finally {
if (VcbResourceAcquired) {
ExReleaseResourceLite(&Vcb->MainResource);
}
if (!IrpContext->ExceptionInProgress) {
if (Status == STATUS_PENDING) {
Ext2QueueRequest(IrpContext);
} else {
Ext2CompleteIrpContext(IrpContext, Status);
}
}
}
return Status;
}
NTSTATUS
Ext2QueryVolumeInformation (IN PEXT2_IRP_CONTEXT IrpContext)
{
PDEVICE_OBJECT DeviceObject;
PEXT2_VCB Vcb = NULL;
PIRP Irp = NULL;
PIO_STACK_LOCATION IoStackLocation = NULL;
PVOID Buffer;
ULONG Length;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
FS_INFORMATION_CLASS FsInformationClass;
BOOLEAN VcbResourceAcquired = FALSE;
__try {
ASSERT(IrpContext != NULL);
ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
(IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
DeviceObject = IrpContext->DeviceObject;
//
// This request is not allowed on the main device object
//
if (IsExt2FsDevice(DeviceObject)) {
Status = STATUS_INVALID_DEVICE_REQUEST;
__leave;
}
Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
ASSERT(Vcb != NULL);
ASSERT((Vcb->Identifier.Type == EXT2VCB) &&
(Vcb->Identifier.Size == sizeof(EXT2_VCB)));
if (!IsMounted(Vcb)) {
Status = STATUS_VOLUME_DISMOUNTED;
__leave;
}
if (!ExAcquireResourceSharedLite(
&Vcb->MainResource,
IsFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)
)) {
Status = STATUS_PENDING;
__leave;
}
VcbResourceAcquired = TRUE;
Irp = IrpContext->Irp;
IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
FsInformationClass =
IoStackLocation->Parameters.QueryVolume.FsInformationClass;
Length = IoStackLocation->Parameters.QueryVolume.Length;
Buffer = Irp->AssociatedIrp.SystemBuffer;
RtlZeroMemory(Buffer, Length);
switch (FsInformationClass) {
case FileFsVolumeInformation:
{
PFILE_FS_VOLUME_INFORMATION FsVolInfo;
ULONG VolumeLabelLength;
ULONG RequiredLength;
if (Length < sizeof(FILE_FS_VOLUME_INFORMATION)) {
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
FsVolInfo = (PFILE_FS_VOLUME_INFORMATION) Buffer;
FsVolInfo->VolumeCreationTime.QuadPart = 0;
FsVolInfo->VolumeSerialNumber = Vcb->Vpb->SerialNumber;
VolumeLabelLength = Vcb->Vpb->VolumeLabelLength;
FsVolInfo->VolumeLabelLength = VolumeLabelLength;
/* We don't support ObjectId */
FsVolInfo->SupportsObjects = FALSE;
RequiredLength = sizeof(FILE_FS_VOLUME_INFORMATION)
+ VolumeLabelLength - sizeof(WCHAR);
if (Length < RequiredLength) {
Irp->IoStatus.Information =
sizeof(FILE_FS_VOLUME_INFORMATION);
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
RtlCopyMemory(FsVolInfo->VolumeLabel, Vcb->Vpb->VolumeLabel, Vcb->Vpb->VolumeLabelLength);
Irp->IoStatus.Information = RequiredLength;
Status = STATUS_SUCCESS;
}
break;
case FileFsSizeInformation:
{
PFILE_FS_SIZE_INFORMATION FsSizeInfo;
if (Length < sizeof(FILE_FS_SIZE_INFORMATION)) {
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
FsSizeInfo = (PFILE_FS_SIZE_INFORMATION) Buffer;
FsSizeInfo->TotalAllocationUnits.QuadPart =
ext3_blocks_count(SUPER_BLOCK);
FsSizeInfo->AvailableAllocationUnits.QuadPart =
ext3_free_blocks_count(SUPER_BLOCK);
FsSizeInfo->SectorsPerAllocationUnit =
Vcb->BlockSize / Vcb->DiskGeometry.BytesPerSector;
FsSizeInfo->BytesPerSector =
Vcb->DiskGeometry.BytesPerSector;
Irp->IoStatus.Information = sizeof(FILE_FS_SIZE_INFORMATION);
Status = STATUS_SUCCESS;
}
break;
case FileFsDeviceInformation:
{
PFILE_FS_DEVICE_INFORMATION FsDevInfo;
if (Length < sizeof(FILE_FS_DEVICE_INFORMATION)) {
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
FsDevInfo = (PFILE_FS_DEVICE_INFORMATION) Buffer;
FsDevInfo->DeviceType =
Vcb->TargetDeviceObject->DeviceType;
if (FsDevInfo->DeviceType != FILE_DEVICE_DISK) {
DbgBreak();
}
FsDevInfo->Characteristics =
Vcb->TargetDeviceObject->Characteristics;
if (IsVcbReadOnly(Vcb)) {
SetFlag( FsDevInfo->Characteristics,
FILE_READ_ONLY_DEVICE );
}
Irp->IoStatus.Information = sizeof(FILE_FS_DEVICE_INFORMATION);
Status = STATUS_SUCCESS;
}
break;
case FileFsAttributeInformation:
{
PFILE_FS_ATTRIBUTE_INFORMATION FsAttrInfo;
ULONG RequiredLength;
if (Length < sizeof(FILE_FS_ATTRIBUTE_INFORMATION)) {
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
FsAttrInfo =
(PFILE_FS_ATTRIBUTE_INFORMATION) Buffer;
FsAttrInfo->FileSystemAttributes = FILE_SUPPORTS_HARD_LINKS |
FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES |
FILE_SUPPORTS_REPARSE_POINTS;
if (IsVcbReadOnly(Vcb)) {
FsAttrInfo->FileSystemAttributes |= FILE_READ_ONLY_VOLUME;
}
FsAttrInfo->MaximumComponentNameLength = EXT2_NAME_LEN;
FsAttrInfo->FileSystemNameLength = 8;
RequiredLength = sizeof(FILE_FS_ATTRIBUTE_INFORMATION) +
8 - sizeof(WCHAR);
if (Length < RequiredLength) {
Irp->IoStatus.Information =
sizeof(FILE_FS_ATTRIBUTE_INFORMATION);
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
if (IsFlagOn(SUPER_BLOCK->s_feature_incompat, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
RtlCopyMemory(FsAttrInfo->FileSystemName, L"EXT4\0", 10);
} else if (Vcb->IsExt3fs) {
RtlCopyMemory(FsAttrInfo->FileSystemName, L"EXT3\0", 10);
} else {
RtlCopyMemory(FsAttrInfo->FileSystemName, L"EXT2\0", 10);
}
Irp->IoStatus.Information = RequiredLength;
Status = STATUS_SUCCESS;
}
break;
#if (_WIN32_WINNT >= 0x0500)
case FileFsFullSizeInformation:
{
PFILE_FS_FULL_SIZE_INFORMATION PFFFSI;
if (Length < sizeof(FILE_FS_FULL_SIZE_INFORMATION)) {
Status = STATUS_BUFFER_OVERFLOW;
__leave;
}
PFFFSI = (PFILE_FS_FULL_SIZE_INFORMATION) Buffer;
/*
typedef struct _FILE_FS_FULL_SIZE_INFORMATION {
LARGE_INTEGER TotalAllocationUnits;
LARGE_INTEGER CallerAvailableAllocationUnits;
LARGE_INTEGER ActualAvailableAllocationUnits;
ULONG SectorsPerAllocationUnit;
ULONG BytesPerSector;
} FILE_FS_FULL_SIZE_INFORMATION, *PFILE_FS_FULL_SIZE_INFORMATION;
*/
{
PFFFSI->TotalAllocationUnits.QuadPart =
ext3_blocks_count(SUPER_BLOCK);
PFFFSI->CallerAvailableAllocationUnits.QuadPart =
ext3_free_blocks_count(SUPER_BLOCK);
/* - Vcb->SuperBlock->s_r_blocks_count; */
PFFFSI->ActualAvailableAllocationUnits.QuadPart =
ext3_free_blocks_count(SUPER_BLOCK);
}
PFFFSI->SectorsPerAllocationUnit =
Vcb->BlockSize / Vcb->DiskGeometry.BytesPerSector;
PFFFSI->BytesPerSector = Vcb->DiskGeometry.BytesPerSector;
Irp->IoStatus.Information = sizeof(FILE_FS_FULL_SIZE_INFORMATION);
Status = STATUS_SUCCESS;
}
break;
#endif // (_WIN32_WINNT >= 0x0500)
default:
Status = STATUS_INVALID_INFO_CLASS;
break;
}
} __finally {
if (VcbResourceAcquired) {
ExReleaseResourceLite(&Vcb->MainResource);
}
if (!IrpContext->ExceptionInProgress) {
if (Status == STATUS_PENDING) {
Ext2QueueRequest(IrpContext);
} else {
Ext2CompleteIrpContext(IrpContext, Status);
}
}
}
return Status;
}
