309 lines
7.3 KiB
C
309 lines
7.3 KiB
C
|
/*++
|
|||
|
|
|||
|
Copyright (c) 1989-2000 Microsoft Corporation
|
|||
|
|
|||
|
Module Name:
|
|||
|
|
|||
|
Shutdown.c
|
|||
|
|
|||
|
Abstract:
|
|||
|
|
|||
|
This module implements the file system shutdown routine for Fat
|
|||
|
|
|||
|
// @@BEGIN_DDKSPLIT
|
|||
|
|
|||
|
Author:
|
|||
|
|
|||
|
Gary Kimura [GaryKi] 19-Aug-1991
|
|||
|
|
|||
|
Revision History:
|
|||
|
|
|||
|
// @@END_DDKSPLIT
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
#include "FatProcs.h"
|
|||
|
|
|||
|
//
|
|||
|
// Local debug trace level
|
|||
|
//
|
|||
|
|
|||
|
#define Dbg (DEBUG_TRACE_SHUTDOWN)
|
|||
|
|
|||
|
#ifdef ALLOC_PRAGMA
|
|||
|
#pragma alloc_text(PAGE, FatCommonShutdown)
|
|||
|
#pragma alloc_text(PAGE, FatFsdShutdown)
|
|||
|
#endif
|
|||
|
|
|||
|
|
|||
|
NTSTATUS
|
|||
|
FatFsdShutdown (
|
|||
|
IN PVOLUME_DEVICE_OBJECT VolumeDeviceObject,
|
|||
|
IN PIRP Irp
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This routine implements the FSD part of shutdown. Note that Shutdown will
|
|||
|
never be done asynchronously so we will never need the Fsp counterpart
|
|||
|
to shutdown.
|
|||
|
|
|||
|
This is the shutdown routine for the Fat file system device driver.
|
|||
|
This routine locks the global file system lock and then syncs all the
|
|||
|
mounted volumes.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
VolumeDeviceObject - Supplies the volume device object where the
|
|||
|
file exists
|
|||
|
|
|||
|
Irp - Supplies the Irp being processed
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
NTSTATUS - Always STATUS_SUCCESS
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
NTSTATUS Status;
|
|||
|
PIRP_CONTEXT IrpContext = NULL;
|
|||
|
|
|||
|
BOOLEAN TopLevel;
|
|||
|
|
|||
|
DebugTrace(+1, Dbg, "FatFsdShutdown\n", 0);
|
|||
|
|
|||
|
//
|
|||
|
// Call the common shutdown routine.
|
|||
|
//
|
|||
|
|
|||
|
FsRtlEnterFileSystem();
|
|||
|
|
|||
|
TopLevel = FatIsIrpTopLevel( Irp );
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
IrpContext = FatCreateIrpContext( Irp, TRUE );
|
|||
|
|
|||
|
Status = FatCommonShutdown( IrpContext, Irp );
|
|||
|
|
|||
|
} 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, "FatFsdShutdown -> %08lx\n", Status);
|
|||
|
|
|||
|
UNREFERENCED_PARAMETER( VolumeDeviceObject );
|
|||
|
|
|||
|
return Status;
|
|||
|
}
|
|||
|
|
|||
|
|
|||
|
NTSTATUS
|
|||
|
FatCommonShutdown (
|
|||
|
IN PIRP_CONTEXT IrpContext,
|
|||
|
IN PIRP Irp
|
|||
|
)
|
|||
|
|
|||
|
/*++
|
|||
|
|
|||
|
Routine Description:
|
|||
|
|
|||
|
This is the common routine for shutdown called by both the fsd and
|
|||
|
fsp threads.
|
|||
|
|
|||
|
Arguments:
|
|||
|
|
|||
|
Irp - Supplies the Irp being processed
|
|||
|
|
|||
|
Return Value:
|
|||
|
|
|||
|
NTSTATUS - The return status for the operation
|
|||
|
|
|||
|
--*/
|
|||
|
|
|||
|
{
|
|||
|
PKEVENT Event;
|
|||
|
|
|||
|
PLIST_ENTRY Links;
|
|||
|
PVCB Vcb;
|
|||
|
PIRP NewIrp;
|
|||
|
IO_STATUS_BLOCK Iosb;
|
|||
|
|
|||
|
//
|
|||
|
// Make sure we don't get any pop-ups, and write everything through.
|
|||
|
//
|
|||
|
|
|||
|
SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_DISABLE_POPUPS |
|
|||
|
IRP_CONTEXT_FLAG_WRITE_THROUGH);
|
|||
|
|
|||
|
//
|
|||
|
// Allocate an initialize an event for doing calls down to
|
|||
|
// our target deivce objects
|
|||
|
//
|
|||
|
|
|||
|
Event = FsRtlAllocatePoolWithTag( NonPagedPool,
|
|||
|
sizeof(KEVENT),
|
|||
|
TAG_EVENT );
|
|||
|
KeInitializeEvent( Event, NotificationEvent, FALSE );
|
|||
|
|
|||
|
//
|
|||
|
// Indicate that shutdown has started. This is used in FatFspClose.
|
|||
|
//
|
|||
|
|
|||
|
FatData.ShutdownStarted = TRUE;
|
|||
|
|
|||
|
//
|
|||
|
// Get everyone else out of the way
|
|||
|
//
|
|||
|
|
|||
|
(VOID) FatAcquireExclusiveGlobal( IrpContext );
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
//
|
|||
|
// For every volume that is mounted we will flush the
|
|||
|
// volume and then shutdown the target device objects.
|
|||
|
//
|
|||
|
|
|||
|
Links = FatData.VcbQueue.Flink;
|
|||
|
while (Links != &FatData.VcbQueue) {
|
|||
|
|
|||
|
Vcb = CONTAINING_RECORD(Links, VCB, VcbLinks);
|
|||
|
|
|||
|
Links = Links->Flink;
|
|||
|
|
|||
|
//
|
|||
|
// If we have already been called before for this volume
|
|||
|
// (and yes this does happen), skip this volume as no writes
|
|||
|
// have been allowed since the first shutdown.
|
|||
|
//
|
|||
|
|
|||
|
if ( FlagOn( Vcb->VcbState, VCB_STATE_FLAG_SHUTDOWN) ||
|
|||
|
(Vcb->VcbCondition != VcbGood) ) {
|
|||
|
|
|||
|
continue;
|
|||
|
}
|
|||
|
|
|||
|
FatAcquireExclusiveVolume( IrpContext, Vcb );
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
(VOID)FatFlushVolume( IrpContext, Vcb, Flush );
|
|||
|
|
|||
|
//
|
|||
|
// The volume is now clean, note it. We purge the
|
|||
|
// volume file cache map before marking the volume
|
|||
|
// clean incase there is a stale Bpb in the cache.
|
|||
|
//
|
|||
|
|
|||
|
if (!FlagOn(Vcb->VcbState, VCB_STATE_FLAG_MOUNTED_DIRTY)) {
|
|||
|
|
|||
|
CcPurgeCacheSection( &Vcb->SectionObjectPointers,
|
|||
|
NULL,
|
|||
|
0,
|
|||
|
FALSE );
|
|||
|
|
|||
|
FatMarkVolume( IrpContext, Vcb, VolumeClean );
|
|||
|
}
|
|||
|
|
|||
|
} except( EXCEPTION_EXECUTE_HANDLER ) {
|
|||
|
|
|||
|
FatResetExceptionState( IrpContext );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// Sometimes we take an excepion while flushing the volume, such
|
|||
|
// as when autoconv has converted the volume and is rebooting.
|
|||
|
// Even in that case we want to send the shutdown irp to the
|
|||
|
// target device so it can know to flush its cache, if it has one.
|
|||
|
//
|
|||
|
|
|||
|
try {
|
|||
|
|
|||
|
NewIrp = IoBuildSynchronousFsdRequest( IRP_MJ_SHUTDOWN,
|
|||
|
Vcb->TargetDeviceObject,
|
|||
|
NULL,
|
|||
|
0,
|
|||
|
NULL,
|
|||
|
Event,
|
|||
|
&Iosb );
|
|||
|
|
|||
|
if (NewIrp != NULL) {
|
|||
|
|
|||
|
if (NT_SUCCESS(IoCallDriver( Vcb->TargetDeviceObject, NewIrp ))) {
|
|||
|
|
|||
|
(VOID) KeWaitForSingleObject( Event,
|
|||
|
Executive,
|
|||
|
KernelMode,
|
|||
|
FALSE,
|
|||
|
NULL );
|
|||
|
|
|||
|
KeClearEvent( Event );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
} except( EXCEPTION_EXECUTE_HANDLER ) {
|
|||
|
|
|||
|
FatResetExceptionState( IrpContext );
|
|||
|
}
|
|||
|
|
|||
|
SetFlag( Vcb->VcbState, VCB_STATE_FLAG_SHUTDOWN );
|
|||
|
|
|||
|
FatReleaseVolume( IrpContext, Vcb );
|
|||
|
|
|||
|
//
|
|||
|
// Attempt to punch the volume down.
|
|||
|
//
|
|||
|
|
|||
|
if (!FatCheckForDismount( IrpContext, Vcb, FALSE )) {
|
|||
|
|
|||
|
FatFspClose( NULL );
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
} finally {
|
|||
|
|
|||
|
ExFreePool( Event );
|
|||
|
|
|||
|
FatReleaseGlobal( IrpContext );
|
|||
|
|
|||
|
//
|
|||
|
// Unregister the file system.
|
|||
|
//
|
|||
|
|
|||
|
IoUnregisterFileSystem( FatDiskFileSystemDeviceObject);
|
|||
|
IoUnregisterFileSystem( FatCdromFileSystemDeviceObject);
|
|||
|
IoDeleteDevice( FatDiskFileSystemDeviceObject);
|
|||
|
IoDeleteDevice( FatCdromFileSystemDeviceObject);
|
|||
|
|
|||
|
FatCompleteRequest( IrpContext, Irp, STATUS_SUCCESS );
|
|||
|
}
|
|||
|
|
|||
|
//
|
|||
|
// And return to our caller
|
|||
|
//
|
|||
|
|
|||
|
DebugTrace(-1, Dbg, "FatFsdShutdown -> STATUS_SUCCESS\n", 0);
|
|||
|
|
|||
|
return STATUS_SUCCESS;
|
|||
|
}
|