Intravision
/
reactos
mirror of https://github.com/reactos/reactos.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
reactos/drivers/filesystems/fastfat_new/devctrl.c

416 lines
10 KiB
C
Raw Blame History

/*++
Copyright (c) 1989-2000 Microsoft Corporation
Module Name:
DevCtrl.c
Abstract:
This module implements the File System Device Control routines for Fat
called by the dispatch driver.
--*/
#include "fatprocs.h"
//
// The local debug trace level
//
#define Dbg (DEBUG_TRACE_DEVCTRL)
//
// Local procedure prototypes
//
//
// Tell prefast this is an IO_COMPLETION_ROUTINE
//
IO_COMPLETION_ROUTINE FatDeviceControlCompletionRoutine;
NTSTATUS
NTAPI
FatDeviceControlCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Contxt
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FatCommonDeviceControl)
#pragma alloc_text(PAGE, FatFsdDeviceControl)
#endif
_Function_class_(IRP_MJ_DEVICE_CONTROL)
_Function_class_(DRIVER_DISPATCH)
NTSTATUS
NTAPI
FatFsdDeviceControl (
_In_ PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
_Inout_ PIRP Irp
)
/*++
Routine Description:
This routine implements the FSD part of Device control operations
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;
PIRP_CONTEXT IrpContext = NULL;
BOOLEAN TopLevel;
PAGED_CODE();
DebugTrace(+1, Dbg, "FatFsdDeviceControl\n", 0);
FsRtlEnterFileSystem();
TopLevel = FatIsIrpTopLevel( Irp );
_SEH2_TRY {
IrpContext = FatCreateIrpContext( Irp, CanFsdWait( Irp ));
Status = FatCommonDeviceControl( IrpContext, Irp );
} _SEH2_EXCEPT(FatExceptionFilter( IrpContext, _SEH2_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
// exception code
//
Status = FatProcessException( IrpContext, Irp, _SEH2_GetExceptionCode() );
} _SEH2_END;
if (TopLevel) { IoSetTopLevelIrp( NULL ); }
FsRtlExitFileSystem();
//
// And return to our caller
//
DebugTrace(-1, Dbg, "FatFsdDeviceControl -> %08lx\n", Status);
UNREFERENCED_PARAMETER( VolumeDeviceObject );
return Status;
}
_Requires_lock_held_(_Global_critical_region_)
NTSTATUS
FatCommonDeviceControl (
IN PIRP_CONTEXT IrpContext,
IN PIRP Irp
)
/*++
Routine Description:
This is the common routine for doing Device control operations called
by both the fsd and fsp threads
Arguments:
Irp - Supplies the Irp to process
InFsp - Indicates if this is the fsp thread or someother thread
Return Value:
NTSTATUS - The return status for the operation
--*/
{
NTSTATUS Status;
PIO_STACK_LOCATION IrpSp;
KEVENT WaitEvent;
PVOID CompletionContext = NULL;
PVCB Vcb;
PFCB Fcb;
PCCB Ccb;
PAGED_CODE();
//
// Get a pointer to the current Irp stack location
//
IrpSp = IoGetCurrentIrpStackLocation( Irp );
DebugTrace(+1, Dbg, "FatCommonDeviceControl\n", 0);
DebugTrace( 0, Dbg, "Irp = %p\n", Irp);
DebugTrace( 0, Dbg, "MinorFunction = %08lx\n", IrpSp->MinorFunction);
//
// Decode the file object, the only type of opens we accept are
// user volume opens.
//
if (FatDecodeFileObject( IrpSp->FileObject, &Vcb, &Fcb, &Ccb ) != UserVolumeOpen) {
FatCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
DebugTrace(-1, Dbg, "FatCommonDeviceControl -> %08lx\n", STATUS_INVALID_PARAMETER);
return STATUS_INVALID_PARAMETER;
}
//
// A few IOCTLs actually require some intervention on our part
//
switch (IrpSp->Parameters.DeviceIoControl.IoControlCode) {
case IOCTL_VOLSNAP_FLUSH_AND_HOLD_WRITES:
//
// This is sent by the Volume Snapshot driver (Lovelace).
// We flush the volume, and hold all file resources
// to make sure that nothing more gets dirty. Then we wait
// for the IRP to complete or cancel.
//
SetFlag( IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT );
FatAcquireExclusiveVolume( IrpContext, Vcb );
FatFlushAndCleanVolume( IrpContext,
Irp,
Vcb,
FlushWithoutPurge );
KeInitializeEvent( &WaitEvent, NotificationEvent, FALSE );
CompletionContext = &WaitEvent;
//
// Get the next stack location, and copy over the stack location
//
IoCopyCurrentIrpStackLocationToNext( Irp );
//
// Set up the completion routine
//
IoSetCompletionRoutine( Irp,
FatDeviceControlCompletionRoutine,
CompletionContext,
TRUE,
TRUE,
TRUE );
break;
case IOCTL_DISK_COPY_DATA:
//
// We cannot allow this IOCTL to be sent unless the volume is locked,
// since this IOCTL allows direct writing of data to the volume.
// We do allow kernel callers to force access via a flag. A handle that
// issued a dismount can send this IOCTL as well.
//
if (!FlagOn( Vcb->VcbState, VCB_STATE_FLAG_LOCKED ) &&
!FlagOn( IrpSp->Flags, SL_FORCE_DIRECT_WRITE ) &&
!FlagOn( Ccb->Flags, CCB_FLAG_COMPLETE_DISMOUNT )) {
FatCompleteRequest( IrpContext,
Irp,
STATUS_ACCESS_DENIED );
DebugTrace(-1, Dbg, "FatCommonDeviceControl -> %08lx\n", STATUS_ACCESS_DENIED);
return STATUS_ACCESS_DENIED;
}
break;
case IOCTL_SCSI_PASS_THROUGH:
case IOCTL_SCSI_PASS_THROUGH_DIRECT:
case IOCTL_SCSI_PASS_THROUGH_EX:
case IOCTL_SCSI_PASS_THROUGH_DIRECT_EX:
//
// If someone is issuing a format unit command underneath us, then make
// sure we mark the device as needing verification when they close their
// handle.
//
if ((!FlagOn( IrpSp->FileObject->Flags, FO_FILE_MODIFIED ) ||
!FlagOn( Ccb->Flags, CCB_FLAG_SENT_FORMAT_UNIT )) &&
(Irp->AssociatedIrp.SystemBuffer != NULL)) {
PCDB Cdb = NULL;
//
// If this is a 32 bit application running on 64 bit then thunk the
// input structures to grab the Cdb.
//
#if defined (_WIN64) && defined(BUILD_WOW64_ENABLED)
if (IoIs32bitProcess(Irp)) {
if ( (IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_SCSI_PASS_THROUGH) ||
(IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_SCSI_PASS_THROUGH_DIRECT )) {
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength >= sizeof( SCSI_PASS_THROUGH32 )) {
Cdb = (PCDB)((PSCSI_PASS_THROUGH32)(Irp->AssociatedIrp.SystemBuffer))->Cdb;
}
} else {
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength >= sizeof( SCSI_PASS_THROUGH32_EX )) {
Cdb = (PCDB)((PSCSI_PASS_THROUGH32_EX)(Irp->AssociatedIrp.SystemBuffer))->Cdb;
}
}
} else {
#endif
if ( (IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_SCSI_PASS_THROUGH) ||
(IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_SCSI_PASS_THROUGH_DIRECT )) {
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength >= sizeof( SCSI_PASS_THROUGH )) {
Cdb = (PCDB)((PSCSI_PASS_THROUGH)(Irp->AssociatedIrp.SystemBuffer))->Cdb;
}
} else {
if (IrpSp->Parameters.DeviceIoControl.InputBufferLength >= sizeof( SCSI_PASS_THROUGH_EX )) {
Cdb = (PCDB)((PSCSI_PASS_THROUGH_EX)(Irp->AssociatedIrp.SystemBuffer))->Cdb;
}
}
#if defined (_WIN64) && defined(BUILD_WOW64_ENABLED)
}
#endif
if ((Cdb != NULL) && (Cdb->AsByte[0] == SCSIOP_FORMAT_UNIT)) {
SetFlag( Ccb->Flags, CCB_FLAG_SENT_FORMAT_UNIT );
SetFlag( IrpSp->FileObject->Flags, FO_FILE_MODIFIED );
}
}
//
// Fall through as we do not need to know the outcome of this operation.
//
default:
//
// FAT doesn't need to see this on the way back, so skip ourselves.
//
IoSkipCurrentIrpStackLocation( Irp );
break;
}
//
// Send the request.
//
Status = IoCallDriver(Vcb->TargetDeviceObject, Irp);
if (Status == STATUS_PENDING && CompletionContext) {
KeWaitForSingleObject( &WaitEvent,
Executive,
KernelMode,
FALSE,
NULL );
Status = Irp->IoStatus.Status;
}
//
// If we had a context, the IRP remains for us and we will complete it.
// Handle it appropriately.
//
if (CompletionContext) {
//
// Release all the resources that we held because of a
// VOLSNAP_FLUSH_AND_HOLD.
//
NT_ASSERT( IrpSp->Parameters.DeviceIoControl.IoControlCode == IOCTL_VOLSNAP_FLUSH_AND_HOLD_WRITES );
FatReleaseVolume( IrpContext, Vcb );
//
// If we had no context, the IRP will complete asynchronously.
//
} else {
Irp = NULL;
}
FatCompleteRequest( IrpContext, Irp, Status );
DebugTrace(-1, Dbg, "FatCommonDeviceControl -> %08lx\n", Status);
return Status;
}
//
// Local support routine
//
NTSTATUS
NTAPI
FatDeviceControlCompletionRoutine(
_In_ PDEVICE_OBJECT DeviceObject,
_In_ PIRP Irp,
_In_reads_opt_(_Inexpressible_("varies")) PVOID Contxt
)
{
PKEVENT Event = (PKEVENT) Contxt;
//
// If there is an event, this is a synch request. Signal and
// let I/O know this isn't done yet.
//
if (Event) {
KeSetEvent( Event, 0, FALSE );
return STATUS_MORE_PROCESSING_REQUIRED;
}
UNREFERENCED_PARAMETER( DeviceObject );
UNREFERENCED_PARAMETER( Irp );
return STATUS_SUCCESS;
}
Reference in New Issue View Git Blame Copy Permalink