NTSTATUS
FatFsdClose (
_In_ PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
_Inout_ PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of Close.
Arguments:
VolumeDeviceObject - Supplies the volume device object where the
file exists
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The FSD status for the IRP
--*/
{
NTSTATUS Status = STATUS_SUCCESS;
PIO_STACK_LOCATION IrpSp;
PFILE_OBJECT FileObject;
PVCB Vcb;
PFCB Fcb;
PCCB Ccb;
TYPE_OF_OPEN TypeOfOpen;
BOOLEAN TopLevel;
BOOLEAN VcbDeleted = FALSE;
PAGED_CODE();
//
// If we were called with our file system device object instead of a
// volume device object, just complete this request with STATUS_SUCCESS
//
if (FatDeviceIsFatFsdo( VolumeDeviceObject)) {
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
IoCompleteRequest( Irp, IO_DISK_INCREMENT );
return STATUS_SUCCESS;
}
DebugTrace(+1, Dbg, "FatFsdClose\n", 0);
//
// Call the common Close routine
//
FsRtlEnterFileSystem();
TopLevel = FatIsIrpTopLevel( Irp );
//
// Get a pointer to the current stack location and the file object
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
FileObject = IrpSp->FileObject;
//
// Decode the file object and set the read-only bit in the Ccb.
//
TypeOfOpen = FatDecodeFileObject( FileObject, &Vcb, &Fcb, &Ccb );
if (Ccb && IsFileObjectReadOnly(FileObject)) {
SetFlag( Ccb->Flags, CCB_FLAG_READ_ONLY );
}
try {
PCLOSE_CONTEXT CloseContext = NULL;
//
// If we are top level, WAIT can be TRUE, otherwise make it FALSE
// to avoid deadlocks, unless this is a top
// level request not originating from the system process.
//
BOOLEAN Wait = TopLevel && (PsGetCurrentProcess() != FatData.OurProcess);
#if (NTDDI_VERSION >= NTDDI_WIN8)
//
// To catch the odd case where a close comes in without a preceding cleanup,
// call the oplock package to get rid of any oplock state. This can only
// be safely done in the FSD path.
//
if ((Fcb != NULL) &&
!FlagOn( FileObject->Flags, FO_CLEANUP_COMPLETE ) &&
FatIsFileOplockable( Fcb )) {
//
// This is equivalent to handling cleanup, and it always cleans up any
// oplock immediately. Also, we don't need any locking of the FCB here;
// the oplock's own lock will be sufficient for this purpose.
//
FsRtlCheckOplockEx( FatGetFcbOplock(Fcb),
Irp,
0,
NULL,
NULL,
NULL );
}
#endif
//
// Call the common Close routine if we are not delaying this close.
//
if ((((TypeOfOpen == UserFileOpen) ||
(TypeOfOpen == UserDirectoryOpen)) &&
FlagOn(Fcb->FcbState, FCB_STATE_DELAY_CLOSE) &&
!FatData.ShutdownStarted) ||
(FatCommonClose( Vcb, Fcb, Ccb, TypeOfOpen, Wait, TopLevel, &VcbDeleted ) == STATUS_PENDING)) {
//
// Metadata streams have had close contexts preallocated.
//
if (TypeOfOpen == VirtualVolumeFile) {
NT_ASSERT( Vcb->CloseContext != NULL );
CloseContext = Vcb->CloseContext;
Vcb->CloseContext = NULL;
CloseContext->Free = TRUE;
}
else if ((TypeOfOpen == DirectoryFile) || (TypeOfOpen == EaFile)) {
CloseContext = FatAllocateCloseContext( Vcb);
NT_ASSERT( CloseContext != NULL );
CloseContext->Free = TRUE;
} else {
//
// Free up any query template strings before using the close context fields,
// which overlap (union)
//
FatDeallocateCcbStrings( Ccb );
CloseContext = &Ccb->CloseContext;
CloseContext->Free = FALSE;
SetFlag( Ccb->Flags, CCB_FLAG_CLOSE_CONTEXT );
}
//
// If the status is pending, then let's get the information we
// need into the close context we already have bagged, complete
// the request, and post it. It is important we allocate nothing
// in the close path.
//
CloseContext->Vcb = Vcb;
CloseContext->Fcb = Fcb;
CloseContext->TypeOfOpen = TypeOfOpen;
//
// Send it off, either to an ExWorkerThread or to the async
// close list.
//
FatQueueClose( CloseContext,
(BOOLEAN)(Fcb && FlagOn(Fcb->FcbState, FCB_STATE_DELAY_CLOSE)));
} else {
//
// The close proceeded synchronously, so for the metadata objects we
// can now drop the close context we preallocated.
//
if ((TypeOfOpen == VirtualVolumeFile) ||
(TypeOfOpen == DirectoryFile) ||
(TypeOfOpen == EaFile)) {
if (TypeOfOpen == VirtualVolumeFile) {
//
// If the VCB was deleted during the close, the close context for this
// open has already been freed.
//
if (!VcbDeleted) {
CloseContext = Vcb->CloseContext;
Vcb->CloseContext = NULL;
NT_ASSERT( CloseContext != NULL );
} else {
CloseContext = NULL;
}
}
else {
CloseContext = FatAllocateCloseContext( (VcbDeleted ? NULL : Vcb) );
NT_ASSERT( CloseContext != NULL );
}
if (CloseContext != NULL) {
ExFreePool( CloseContext );
}
}
}
FatCompleteRequest( FatNull, Irp, Status );
}
except(FatExceptionFilter( NULL, GetExceptionInformation() )) {
//
// We had some trouble trying to perform the requested
// operation, so we'll abort the I/O request with the
// error status that we get back from the execption code.
//
Status = FatProcessException( NULL, Irp, GetExceptionCode() );
}
if (TopLevel) { IoSetTopLevelIrp( NULL ); }
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace(-1, Dbg, "FatFsdClose -> %08lx\n", Status);
UNREFERENCED_PARAMETER( VolumeDeviceObject );
return Status;
}
NTSTATUS
FatFsdRead (
IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This is the driver entry to the common read routine for NtReadFile calls.
For synchronous requests, the CommonRead is called with Wait == TRUE,
which means the request will always be completed in the current thread,
and never passed to the Fsp. If it is not a synchronous request,
CommonRead is called with Wait == FALSE, which means the request
will be passed to the Fsp only if there is a need to block.
Arguments:
VolumeDeviceObject - Supplies the volume device object where the
file being Read exists
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The FSD status for the IRP
--*/
{
PFCB Fcb = NULL;
NTSTATUS Status;
PIRP_CONTEXT IrpContext = NULL;
BOOLEAN TopLevel;
DebugTrace(+1, Dbg, "FatFsdRead\n", 0);
//
// Call the common Read routine, with blocking allowed if synchronous
//
FsRtlEnterFileSystem();
//
// We are first going to do a quick check for paging file IO. Since this
// is a fast path, we must replicate the check for the fsdo.
//
if (!FatDeviceIsFatFsdo( IoGetCurrentIrpStackLocation(Irp)->DeviceObject)) {
Fcb = (PFCB)(IoGetCurrentIrpStackLocation(Irp)->FileObject->FsContext);
if ((NodeType(Fcb) == FAT_NTC_FCB) &&
FlagOn(Fcb->FcbState, FCB_STATE_PAGING_FILE)) {
//
// Do the usual STATUS_PENDING things.
//
IoMarkIrpPending( Irp );
//
// If there is not enough stack to do this read, then post this
// read to the overflow queue.
//
if (IoGetRemainingStackSize() < OVERFLOW_READ_THRESHHOLD) {
KEVENT Event;
PAGING_FILE_OVERFLOW_PACKET Packet;
Packet.Irp = Irp;
Packet.Fcb = Fcb;
KeInitializeEvent( &Event, NotificationEvent, FALSE );
FsRtlPostPagingFileStackOverflow( &Packet, &Event, FatOverflowPagingFileRead );
//
// And wait for the worker thread to complete the item
//
(VOID) KeWaitForSingleObject( &Event, Executive, KernelMode, FALSE, NULL );
} else {
//
// Perform the actual IO, it will be completed when the io finishes.
//
FatPagingFileIo( Irp, Fcb );
}
FsRtlExitFileSystem();
return STATUS_PENDING;
}
}
try {
TopLevel = FatIsIrpTopLevel( Irp );
IrpContext = FatCreateIrpContext( Irp, CanFsdWait( Irp ) );
//
// If this is an Mdl complete request, don't go through
// common read.
//
if ( FlagOn(IrpContext->MinorFunction, IRP_MN_COMPLETE) ) {
DebugTrace(0, Dbg, "Calling FatCompleteMdl\n", 0 );
try_return( Status = FatCompleteMdl( IrpContext, Irp ));
}
//
// Check if we have enough stack space to process this request. If there
// isn't enough then we will pass the request off to the stack overflow thread.
//
if (IoGetRemainingStackSize() < OVERFLOW_READ_THRESHHOLD) {
DebugTrace(0, Dbg, "Passing StackOverflowRead off\n", 0 );
try_return( Status = FatPostStackOverflowRead( IrpContext, Irp, Fcb ) );
}
Status = FatCommonRead( IrpContext, Irp );
try_exit: NOTHING;
} except(FatExceptionFilter( IrpContext, GetExceptionInformation() )) {
//
// We had some trouble trying to perform the requested
// operation, so we'll abort the I/O request with
// the error status that we get back from the
// execption code
//
Status = FatProcessException( IrpContext, Irp, GetExceptionCode() );
}
if (TopLevel) { IoSetTopLevelIrp( NULL ); }
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace(-1, Dbg, "FatFsdRead -> %08lx\n", Status);
UNREFERENCED_PARAMETER( VolumeDeviceObject );
return Status;
}
NTSTATUS
FatProcessException (
IN PIRP_CONTEXT IrpContext,
IN PIRP Irp,
IN NTSTATUS ExceptionCode
)
/*++
Routine Description:
This routine process an exception. It either completes the request
with the saved exception status or it sends it off to IoRaiseHardError()
Arguments:
Irp - Supplies the Irp being processed
ExceptionCode - Supplies the normalized exception status being handled
Return Value:
NTSTATUS - Returns the results of either posting the Irp or the
saved completion status.
--*/
{
PVCB Vcb;
PIO_STACK_LOCATION IrpSp;
FAT_VOLUME_STATE TransitionState = VolumeDirty;
ULONG SavedFlags;
DebugTrace(0, Dbg, "FatProcessException\n", 0);
//
// If there is not an irp context, we must have had insufficient resources.
//
if ( !ARGUMENT_PRESENT( IrpContext ) ) {
FatCompleteRequest( FatNull, Irp, ExceptionCode );
return ExceptionCode;
}
//
// Get the real exception status from IrpContext->ExceptionStatus, and
// reset it.
//
ExceptionCode = IrpContext->ExceptionStatus;
FatResetExceptionState( IrpContext );
//
// If this is an Mdl write request, then take care of the Mdl
// here so that things get cleaned up properly. Cc now leaves
// the MDL in place so a filesystem can retry after clearing an
// internal condition (FAT does not).
//
#if __NDAS_FAT_WIN2K_SUPPORT__
if (NdFatCcMdlWriteAbort &&
(IrpContext->MajorFunction == IRP_MJ_WRITE) &&
(FlagOn( IrpContext->MinorFunction, IRP_MN_COMPLETE_MDL ) == IRP_MN_COMPLETE_MDL) &&
(Irp->MdlAddress != NULL)) {
PIO_STACK_LOCATION LocalIrpSp = IoGetCurrentIrpStackLocation(Irp);
NdFatCcMdlWriteAbort( LocalIrpSp->FileObject, Irp->MdlAddress );
Irp->MdlAddress = NULL;
}
#else
if ((IrpContext->MajorFunction == IRP_MJ_WRITE) &&
(FlagOn( IrpContext->MinorFunction, IRP_MN_COMPLETE_MDL ) == IRP_MN_COMPLETE_MDL) &&
(Irp->MdlAddress != NULL)) {
PIO_STACK_LOCATION LocalIrpSp = IoGetCurrentIrpStackLocation(Irp);
CcMdlWriteAbort( LocalIrpSp->FileObject, Irp->MdlAddress );
Irp->MdlAddress = NULL;
}
#endif
//
// If we are going to post the request, we may have to lock down the
// user's buffer, so do it here in a try except so that we failed the
// request if the LockPages fails.
//
// Also unpin any repinned Bcbs, protected by the try {} except {} filter.
//
try {
SavedFlags = IrpContext->Flags;
//
// Make sure we don't try to write through Bcbs
//
SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_WRITE_THROUGH);
FatUnpinRepinnedBcbs( IrpContext );
IrpContext->Flags = SavedFlags;
//
// If we will have to post the request, do it here. Note
// that the last thing FatPrePostIrp() does is mark the Irp pending,
// so it is critical that we actually return PENDING. Nothing
// from this point to return can fail, so we are OK.
//
// We cannot do a verify operations at APC level because we
// have to wait for Io operations to complete.
//
#if __NDAS_FAT__
if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_RECURSIVE_CALL) &&
(((ExceptionCode == STATUS_VERIFY_REQUIRED) && (KeGetCurrentIrql() >= APC_LEVEL)) ||
(!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) && ExceptionCode == STATUS_CANT_WAIT))) {
ExceptionCode = FatFsdPostRequest( IrpContext, Irp );
}
#else
if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_RECURSIVE_CALL) &&
(((ExceptionCode == STATUS_VERIFY_REQUIRED) && (KeGetCurrentIrql() >= APC_LEVEL)) ||
(ExceptionCode == STATUS_CANT_WAIT))) {
ExceptionCode = FatFsdPostRequest( IrpContext, Irp );
}
#endif
} except( FatExceptionFilter( IrpContext, GetExceptionInformation() ) ) {
ExceptionCode = IrpContext->ExceptionStatus;
IrpContext->ExceptionStatus = 0;
IrpContext->Flags = SavedFlags;
}
//
// If we posted the request, just return here.
//
if (ExceptionCode == STATUS_PENDING) {
return ExceptionCode;
}
Irp->IoStatus.Status = ExceptionCode;
//
// If this request is not a "top-level" irp, just complete it.
//
if (FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_RECURSIVE_CALL)) {
//
// If there is a cache operation above us, commute verify
// to a lock conflict. This will cause retries so that
// we have a chance of getting through without needing
// to return an unaesthetic error for the operation.
//
if (IoGetTopLevelIrp() == (PIRP)FSRTL_CACHE_TOP_LEVEL_IRP &&
ExceptionCode == STATUS_VERIFY_REQUIRED) {
ExceptionCode = STATUS_FILE_LOCK_CONFLICT;
}
FatCompleteRequest( IrpContext, Irp, ExceptionCode );
return ExceptionCode;
}
if (IoIsErrorUserInduced(ExceptionCode)) {
//
// Check for the various error conditions that can be caused by,
// and possibly resolved by the user.
//
if (ExceptionCode == STATUS_VERIFY_REQUIRED) {
PDEVICE_OBJECT Device;
DebugTrace(0, Dbg, "Perform Verify Operation\n", 0);
//
// Now we are at the top level file system entry point.
//
// Grab the device to verify from the thread local storage
// and stick it in the information field for transportation
// to the fsp. We also clear the field at this time.
//
Device = IoGetDeviceToVerify( Irp->Tail.Overlay.Thread );
IoSetDeviceToVerify( Irp->Tail.Overlay.Thread, NULL );
if ( Device == NULL ) {
Device = IoGetDeviceToVerify( PsGetCurrentThread() );
IoSetDeviceToVerify( PsGetCurrentThread(), NULL );
ASSERT( Device != NULL );
}
//
// Let's not BugCheck just because the driver messed up.
//
if (Device == NULL) {
ExceptionCode = STATUS_DRIVER_INTERNAL_ERROR;
FatCompleteRequest( IrpContext, Irp, ExceptionCode );
return ExceptionCode;
}
//
// FatPerformVerify() will do the right thing with the Irp.
return FatPerformVerify( IrpContext, Irp, Device );
}
//
// The other user induced conditions generate an error unless
// they have been disabled for this request.
//
if (FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_POPUPS)) {
FatCompleteRequest( IrpContext, Irp, ExceptionCode );
return ExceptionCode;
} else {
//
// Generate a pop-up
//
PDEVICE_OBJECT RealDevice;
PVPB Vpb;
PETHREAD Thread;
if (IoGetCurrentIrpStackLocation(Irp)->FileObject != NULL) {
Vpb = IoGetCurrentIrpStackLocation(Irp)->FileObject->Vpb;
} else {
Vpb = NULL;
}
//
// The device to verify is either in my thread local storage
// or that of the thread that owns the Irp.
//
Thread = Irp->Tail.Overlay.Thread;
RealDevice = IoGetDeviceToVerify( Thread );
if ( RealDevice == NULL ) {
Thread = PsGetCurrentThread();
RealDevice = IoGetDeviceToVerify( Thread );
ASSERT( RealDevice != NULL );
}
//
// Let's not BugCheck just because the driver messed up.
//
if (RealDevice == NULL) {
FatCompleteRequest( IrpContext, Irp, ExceptionCode );
return ExceptionCode;
}
//
// This routine actually causes the pop-up. It usually
// does this by queuing an APC to the callers thread,
// but in some cases it will complete the request immediately,
// so it is very important to IoMarkIrpPending() first.
//
IoMarkIrpPending( Irp );
IoRaiseHardError( Irp, Vpb, RealDevice );
//
// We will be handing control back to the caller here, so
// reset the saved device object.
//
IoSetDeviceToVerify( Thread, NULL );
//
// The Irp will be completed by Io or resubmitted. In either
// case we must clean up the IrpContext here.
//
FatDeleteIrpContext( IrpContext );
return STATUS_PENDING;
}
}
//
// This is just a run of the mill error. If is a STATUS that we
// raised ourselves, and the information would be use for the
// user, raise an informational pop-up.
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
Vcb = IrpContext->Vcb;
//
// Now, if the Vcb is unknown to us this means that the error was raised
// in the process of a mount and before we even had a chance to build
// a full Vcb - and was really handled there.
//
if (Vcb != NULL) {
if ( !FatDeviceIsFatFsdo( IrpSp->DeviceObject) &&
!NT_SUCCESS(ExceptionCode) &&
!FsRtlIsTotalDeviceFailure(ExceptionCode) ) {
TransitionState = VolumeDirtyWithSurfaceTest;
}
//
// If this was a STATUS_FILE_CORRUPT or similar error indicating some
// nastiness out on the media, then mark the volume permanently dirty.
//
if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_POPUPS) &&
( TransitionState == VolumeDirtyWithSurfaceTest ||
(ExceptionCode == STATUS_FILE_CORRUPT_ERROR) ||
(ExceptionCode == STATUS_DISK_CORRUPT_ERROR) ||
(ExceptionCode == STATUS_EA_CORRUPT_ERROR) ||
(ExceptionCode == STATUS_INVALID_EA_NAME) ||
(ExceptionCode == STATUS_EA_LIST_INCONSISTENT) ||
(ExceptionCode == STATUS_NO_EAS_ON_FILE) )) {
ASSERT( NodeType(Vcb) == FAT_NTC_VCB );
SetFlag( Vcb->VcbState, VCB_STATE_FLAG_MOUNTED_DIRTY );
//
// Do the "dirty" work, ignoring any error.
//
try {
FatMarkVolume( IrpContext, Vcb, TransitionState );
} except( FatExceptionFilter( IrpContext, GetExceptionInformation() ) ) {
NOTHING;
}
}
}
NTSTATUS
FatFsdCleanup (
IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of closing down a handle to a
file object.
Arguments:
VolumeDeviceObject - Supplies the volume device object where the
file being Cleanup exists
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The FSD status for the IRP
--*/
{
NTSTATUS Status;
PIRP_CONTEXT IrpContext = NULL;
BOOLEAN TopLevel;
PAGED_CODE();
#if __NDAS_FAT__
if ((PVOID)FatControlDeviceObject == VolumeDeviceObject) {
Status = Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
IoCompleteRequest( Irp, IO_DISK_INCREMENT );
return Status;
}
#endif
//
// If we were called with our file system device object instead of a
// volume device object, just complete this request with STATUS_SUCCESS
//
if ( FatDeviceIsFatFsdo( VolumeDeviceObject)) {
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
IoCompleteRequest( Irp, IO_DISK_INCREMENT );
return STATUS_SUCCESS;
}
DebugTrace(+1, Dbg, "FatFsdCleanup\n", 0);
//
// Call the common Cleanup routine, with blocking allowed.
//
FsRtlEnterFileSystem();
TopLevel = FatIsIrpTopLevel( Irp );
#if (__NDAS_FAT_PRIMARY__ || __NDAS_FAT_SECONDARY__)
do {
try {
if (IrpContext == NULL) {
IrpContext = FatCreateIrpContext( Irp, TRUE );
IrpContext->TopLevel = TopLevel;
#if __NDAS_FAT_PRIMARY__
{
ULONG_PTR stackBottom;
ULONG_PTR stackTop;
BOOLEAN validPrimaryRequest = FALSE;
PPRIMARY_REQUEST_INFO primaryRequestInfo;
PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation( Irp );
primaryRequestInfo = (PPRIMARY_REQUEST_INFO)IoGetTopLevelIrp();
IoGetStackLimits( &stackTop, &stackBottom );
if ( (ULONG_PTR)primaryRequestInfo <= stackBottom - sizeof(PRIMARY_REQUEST_INFO) &&
(ULONG_PTR) primaryRequestInfo >= stackTop &&
(!FlagOn( (ULONG_PTR) primaryRequestInfo, 0x3 )) &&
primaryRequestInfo->PrimaryTag == 0xe2027482) {
validPrimaryRequest = TRUE;
}
if (validPrimaryRequest) {
//ASSERT( FatIsTopLevelRequest(IrpContext) );
IoSetTopLevelIrp( NULL );
TopLevel = FatIsIrpTopLevel( Irp );
ClearFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_RECURSIVE_CALL );
if (IsListEmpty(&VolumeDeviceObject->PrimarySessionQueue)) {
NDAS_ASSERT( FALSE );
}
IrpContext->PrimaryRequestInfo = *primaryRequestInfo;
DebugTrace2( 0, Dbg, ("primaryRequestInfo = %p\n", primaryRequestInfo) );
}
}
#endif
}
#if __NDAS_FAT_SECONDARY__
if (IS_SECONDARY_FILEOBJECT(IoGetCurrentIrpStackLocation(Irp)->FileObject)) {
BOOLEAN secondaryResourceAcquired = FALSE;
BOOLEAN secondaryRecoveryResourceAcquired = FALSE;
ASSERT( FatIsTopLevelRequest(IrpContext) );
SetFlag( IrpContext->NdasFatFlags, NDAS_FAT_IRP_CONTEXT_FLAG_SECONDARY_CONTEXT );
Status = STATUS_SUCCESS;
while (TRUE) {
ASSERT( secondaryRecoveryResourceAcquired == FALSE );
ASSERT( secondaryResourceAcquired == FALSE );
if (FlagOn(VolumeDeviceObject->Secondary->Flags, SECONDARY_FLAG_RECONNECTING)) {
if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)) {
Status = FatFsdPostRequest( IrpContext, Irp );
break;
}
}
if (FlagOn(VolumeDeviceObject->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED)) {
if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)) {
Status = FatFsdPostRequest( IrpContext, Irp );
break;
}
secondaryRecoveryResourceAcquired
= SecondaryAcquireResourceExclusiveLite( IrpContext,
&VolumeDeviceObject->RecoveryResource,
BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );
if (!FlagOn(VolumeDeviceObject->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED) ) {
SecondaryReleaseResourceLite( IrpContext, &VolumeDeviceObject->RecoveryResource );
secondaryRecoveryResourceAcquired = FALSE;
continue;
}
secondaryResourceAcquired
= SecondaryAcquireResourceExclusiveLite( IrpContext,
&VolumeDeviceObject->Resource,
BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );
try {
SecondaryRecoverySessionStart( VolumeDeviceObject->Secondary, IrpContext );
} finally {
SecondaryReleaseResourceLite( IrpContext, &VolumeDeviceObject->Resource );
secondaryResourceAcquired = FALSE;
SecondaryReleaseResourceLite( IrpContext, &VolumeDeviceObject->RecoveryResource );
secondaryRecoveryResourceAcquired = FALSE;
}
continue;
}
secondaryResourceAcquired
= SecondaryAcquireResourceSharedLite( IrpContext,
&VolumeDeviceObject->Resource,
BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );
if (secondaryResourceAcquired == FALSE) {
ASSERT( FlagOn(VolumeDeviceObject->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED) ||
FlagOn(VolumeDeviceObject->Secondary->Flags, SECONDARY_FLAG_RECONNECTING) );
continue;
}
break;
}
if (Status == STATUS_SUCCESS) {
try {
Status = FatCommonCleanup( IrpContext, Irp );
} finally {
ASSERT( ExIsResourceAcquiredSharedLite(&VolumeDeviceObject->Resource) );
SecondaryReleaseResourceLite( NULL, &VolumeDeviceObject->Resource );
}
}
} else
Status = FatCommonCleanup( IrpContext, Irp );
#else
Status = FatCommonCleanup( IrpContext, Irp );
#endif
} except(FatExceptionFilter( IrpContext, GetExceptionInformation() )) {
//
// We had some trouble trying to perform the requested
// operation, so we'll abort the I/O request with
// the error status that we get back from the
// execption code
//
Status = FatProcessException( IrpContext, Irp, GetExceptionCode() );
}
} while (Status == STATUS_CANT_WAIT);
NTSTATUS
FatFsdClose (
IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
IN PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of Close.
Arguments:
VolumeDeviceObject - Supplies the volume device object where the
file exists
Irp - Supplies the Irp being processed
Return Value:
NTSTATUS - The FSD status for the IRP
--*/
{
NTSTATUS Status = STATUS_SUCCESS;
PIO_STACK_LOCATION IrpSp;
PFILE_OBJECT FileObject;
PVCB Vcb;
PFCB Fcb;
PCCB Ccb;
TYPE_OF_OPEN TypeOfOpen;
BOOLEAN TopLevel;
BOOLEAN VcbDeleted;
#ifdef __ND_FAT__
if ((PVOID)FatControlDeviceObject == VolumeDeviceObject) {
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
IoCompleteRequest( Irp, IO_DISK_INCREMENT );
return STATUS_SUCCESS;
}
#endif
//
// If we were called with our file system device object instead of a
// volume device object, just complete this request with STATUS_SUCCESS
//
if (FatDeviceIsFatFsdo( VolumeDeviceObject)) {
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = FILE_OPENED;
IoCompleteRequest( Irp, IO_DISK_INCREMENT );
return STATUS_SUCCESS;
}
DebugTrace(+1, Dbg, "FatFsdClose\n", 0);
//
// Call the common Close routine
//
FsRtlEnterFileSystem();
TopLevel = FatIsIrpTopLevel( Irp );
//
// Get a pointer to the current stack location and the file object
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
FileObject = IrpSp->FileObject;
//
// Decode the file object and set the read-only bit in the Ccb.
//
TypeOfOpen = FatDecodeFileObject( FileObject, &Vcb, &Fcb, &Ccb );
if (Ccb && IsFileObjectReadOnly(FileObject)) {
SetFlag( Ccb->Flags, CCB_FLAG_READ_ONLY );
}
try {
PCLOSE_CONTEXT CloseContext;
//
// If we are top level, WAIT can be TRUE, otherwise make it FALSE
// to avoid deadlocks, unless this is a top
// level request not originating from the system process.
//
BOOLEAN Wait = TopLevel && (PsGetCurrentProcess() != FatData.OurProcess);
#ifdef __ND_FAT__
if (Ccb) {
SetFlag( Ccb->NdFatFlags, ND_FAT_CCB_FLAG_CLOSE );
((PCCB)(FileObject->FsContext2))->FileObject = NULL;
FileObject->FsContext = NULL;
FileObject->FsContext2 = NULL;
}
#endif
//
// Call the common Close routine if we are not delaying this close.
//
if ((((TypeOfOpen == UserFileOpen) ||
(TypeOfOpen == UserDirectoryOpen)) &&
FlagOn(Fcb->FcbState, FCB_STATE_DELAY_CLOSE) &&
!FatData.ShutdownStarted) ||
(FatCommonClose( Vcb, Fcb, Ccb, TypeOfOpen, Wait, &VcbDeleted ) == STATUS_PENDING)) {
//
// Metadata streams have had close contexts preallocated.
//
if (TypeOfOpen == VirtualVolumeFile ||
TypeOfOpen == DirectoryFile ||
TypeOfOpen == EaFile) {
CloseContext = FatAllocateCloseContext();
ASSERT( CloseContext != NULL );
CloseContext->Free = TRUE;
} else {
//
// Free up any query template strings before using the close context fields,
// which overlap (union)
//
FatDeallocateCcbStrings( Ccb);
CloseContext = &Ccb->CloseContext;
CloseContext->Free = FALSE;
SetFlag( Ccb->Flags, CCB_FLAG_CLOSE_CONTEXT );
}
//
// If the status is pending, then let's get the information we
// need into the close context we already have bagged, complete
// the request, and post it. It is important we allocate nothing
// in the close path.
//
CloseContext->Vcb = Vcb;
CloseContext->Fcb = Fcb;
CloseContext->TypeOfOpen = TypeOfOpen;
//
// Send it off, either to an ExWorkerThread or to the async
// close list.
//
FatQueueClose( CloseContext,
(BOOLEAN)(Fcb && FlagOn(Fcb->FcbState, FCB_STATE_DELAY_CLOSE)));
} else {
//
// The close proceeded synchronously, so for the metadata objects we
// can now drop the close context we preallocated.
//
if (TypeOfOpen == VirtualVolumeFile ||
TypeOfOpen == DirectoryFile ||
TypeOfOpen == EaFile) {
CloseContext = FatAllocateCloseContext();
ASSERT( CloseContext != NULL );
ExFreePool( CloseContext );
}
}
FatCompleteRequest( FatNull, Irp, Status );
} except(FatExceptionFilter( NULL, GetExceptionInformation() )) {
//
// We had some trouble trying to perform the requested
// operation, so we'll abort the I/O request with the
// error status that we get back from the execption code.
//
Status = FatProcessException( NULL, Irp, GetExceptionCode() );
}
if (TopLevel) { IoSetTopLevelIrp( NULL ); }
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace(-1, Dbg, "FatFsdClose -> %08lx\n", Status);
UNREFERENCED_PARAMETER( VolumeDeviceObject );
return Status;
}
