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/*
* COPYRIGHT: See COPYRIGHT.TXT
* PROJECT: Ext2 File System Driver for WinNT/2K/XP
* FILE: pnp.c
* PROGRAMMER: Matt Wu <mattwu@163.com>
* HOMEPAGE: http://www.ext2fsd.com
* UPDATE HISTORY:
*/
#if (_WIN32_WINNT >= 0x0500)
/* INCLUDES *****************************************************************/
#include "ext2fs.h"
/* GLOBALS ***************************************************************/
extern PEXT2_GLOBAL Ext2Global;
/* DEFINITIONS *************************************************************/
NTSTATUS
Ext2PnpCompletionRoutine (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Contxt );
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, Ext2Pnp)
#pragma alloc_text(PAGE, Ext2PnpQueryRemove)
#pragma alloc_text(PAGE, Ext2PnpRemove)
#pragma alloc_text(PAGE, Ext2PnpCancelRemove)
#pragma alloc_text(PAGE, Ext2PnpSurpriseRemove)
#endif
/* FUNCTIONS *************************************************************/
NTSTATUS
Ext2PnpCompletionRoutine (
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Contxt
)
{
PKEVENT Event = (PKEVENT) Contxt;
KeSetEvent( Event, 0, FALSE );
return STATUS_MORE_PROCESSING_REQUIRED;
UNREFERENCED_PARAMETER( DeviceObject );
UNREFERENCED_PARAMETER( Contxt );
}
NTSTATUS
Ext2Pnp (IN PEXT2_IRP_CONTEXT IrpContext)
{
NTSTATUS Status = STATUS_INVALID_PARAMETER;
PIRP Irp;
PIO_STACK_LOCATION IrpSp;
PEXT2_VCB Vcb;
PDEVICE_OBJECT DeviceObject;
__try {
ASSERT(IrpContext);
ASSERT((IrpContext->Identifier.Type == EXT2ICX) &&
(IrpContext->Identifier.Size == sizeof(EXT2_IRP_CONTEXT)));
DeviceObject = IrpContext->DeviceObject;
Vcb = (PEXT2_VCB) DeviceObject->DeviceExtension;
ASSERT(Vcb != NULL);
if ( !((Vcb->Identifier.Type == EXT2VCB) &&
(Vcb->Identifier.Size == sizeof(EXT2_VCB)))) {
__leave; // Status = STATUS_INVALID_PARAMETER
}
Irp = IrpContext->Irp;
IrpSp = IoGetCurrentIrpStackLocation(Irp);
SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT);
switch ( IrpSp->MinorFunction ) {
case IRP_MN_QUERY_REMOVE_DEVICE:
DEBUG(DL_PNP, ("Ext2Pnp: Ext2PnpQueryRemove...\n"));
Status = Ext2PnpQueryRemove(IrpContext, Vcb);
break;
case IRP_MN_REMOVE_DEVICE:
DEBUG(DL_PNP, ("Ext2Pnp: Ext2PnpRemove...\n"));
Status = Ext2PnpRemove(IrpContext, Vcb);
break;
case IRP_MN_CANCEL_REMOVE_DEVICE:
DEBUG(DL_PNP, ("Ext2Pnp: Ext2PnpCancelRemove...\n"));
Status = Ext2PnpCancelRemove(IrpContext, Vcb);
break;
case IRP_MN_SURPRISE_REMOVAL:
DEBUG(DL_PNP, ("Ext2Pnp: Ext2PnpSupriseRemove...\n"));
Status = Ext2PnpSurpriseRemove(IrpContext, Vcb);
break;
default:
break;
}
} __finally {
if (!IrpContext->ExceptionInProgress) {
Irp = IrpContext->Irp;
if (Irp) {
//
// Here we need pass the IRP to the disk driver.
//
IoSkipCurrentIrpStackLocation( Irp );
Status = IoCallDriver(Vcb->TargetDeviceObject, Irp);
IrpContext->Irp = NULL;
}
Ext2CompleteIrpContext(IrpContext, Status);
}
}
return Status;
}
NTSTATUS
Ext2PnpQueryRemove (
PEXT2_IRP_CONTEXT IrpContext,
PEXT2_VCB Vcb
)
{
NTSTATUS Status = STATUS_SUCCESS;
KEVENT Event;
BOOLEAN bDeleted = FALSE;
BOOLEAN VcbAcquired = FALSE;
__try {
CcWaitForCurrentLazyWriterActivity();
VcbAcquired = ExAcquireResourceExclusiveLite(
&Vcb->MainResource, TRUE );
Ext2FlushFiles(IrpContext, Vcb, FALSE);
Ext2FlushVolume(IrpContext, Vcb, FALSE);
DEBUG(DL_PNP, ("Ext2PnpQueryRemove: Ext2LockVcb: Vcb=%xh FileObject=%xh ...\n",
Vcb, IrpContext->FileObject));
Status = Ext2LockVcb(Vcb, IrpContext->FileObject);
if (VcbAcquired) {
ExReleaseResourceLite(&Vcb->MainResource);
VcbAcquired = FALSE;
}
DEBUG(DL_PNP, ("Ext2PnpQueryRemove: Ext2PurgeVolume ...\n"));
Ext2PurgeVolume(Vcb, TRUE);
if (!NT_SUCCESS(Status)) {
__leave;
}
IoCopyCurrentIrpStackLocationToNext(IrpContext->Irp);
KeInitializeEvent( &Event, NotificationEvent, FALSE );
IoSetCompletionRoutine( IrpContext->Irp,
Ext2PnpCompletionRoutine,
&Event,
TRUE,
TRUE,
TRUE );
DEBUG(DL_PNP, ("Ext2PnpQueryRemove: Call lower level driver...\n"));
Status = IoCallDriver( Vcb->TargetDeviceObject,
IrpContext->Irp);
if (Status == STATUS_PENDING) {
KeWaitForSingleObject( &Event,
Executive,
KernelMode,
FALSE,
NULL );
Status = IrpContext->Irp->IoStatus.Status;
}
if (NT_SUCCESS(Status)) {
ASSERT(!VcbAcquired);
DEBUG(DL_PNP, ("Ext2PnpQueryRemove: Ext2CheckDismount ...\n"));
bDeleted = Ext2CheckDismount(IrpContext, Vcb, TRUE);
DEBUG(DL_PNP, ("Ext2PnpQueryRemove: Ext2FlushVolume bDelted=%xh ...\n", bDeleted));
}
} __finally {
if (VcbAcquired) {
ExReleaseResourceLite(&Vcb->MainResource);
}
IrpContext->Irp->IoStatus.Status = Status;
Ext2CompleteRequest(
IrpContext->Irp, FALSE, (CCHAR)(NT_SUCCESS(Status)?
IO_DISK_INCREMENT : IO_NO_INCREMENT) );
IrpContext->Irp = NULL;
}
return Status;
}
NTSTATUS
Ext2PnpRemove (
PEXT2_IRP_CONTEXT IrpContext,
PEXT2_VCB Vcb )
{
NTSTATUS Status = STATUS_SUCCESS;
KEVENT Event;
BOOLEAN bDeleted;
__try {
DEBUG(DL_PNP, ("Ext2PnpRemove by Ext2Pnp ...\n"));
CcWaitForCurrentLazyWriterActivity();
ExAcquireResourceExclusiveLite(
&Vcb->MainResource, TRUE );
Status = Ext2LockVcb(Vcb, IrpContext->FileObject);
ExReleaseResourceLite(&Vcb->MainResource);
//
// Setup the Irp. We'll send it to the lower disk driver.
//
IoCopyCurrentIrpStackLocationToNext(IrpContext->Irp);
KeInitializeEvent( &Event, NotificationEvent, FALSE );
IoSetCompletionRoutine( IrpContext->Irp,
Ext2PnpCompletionRoutine,
&Event,
TRUE,
TRUE,
TRUE );
Status = IoCallDriver( Vcb->TargetDeviceObject,
IrpContext->Irp);
if (Status == STATUS_PENDING) {
KeWaitForSingleObject( &Event,
Executive,
KernelMode,
FALSE,
NULL );
Status = IrpContext->Irp->IoStatus.Status;
}
/* purge volume cache */
Ext2PurgeVolume(Vcb, FALSE);
/* dismount volume */
bDeleted = Ext2CheckDismount(IrpContext, Vcb, TRUE);
SetLongFlag(Vcb->Flags, VCB_DEVICE_REMOVED);
} __finally {
IrpContext->Irp->IoStatus.Status = Status;
Ext2CompleteRequest(
IrpContext->Irp, FALSE, (CCHAR)(NT_SUCCESS(Status)?
IO_DISK_INCREMENT : IO_NO_INCREMENT) );
IrpContext->Irp = NULL;
}
return Status;
}
NTSTATUS
Ext2PnpSurpriseRemove (
PEXT2_IRP_CONTEXT IrpContext,
PEXT2_VCB Vcb )
{
NTSTATUS Status;
KEVENT Event;
BOOLEAN bDeleted;
__try {
DEBUG(DL_PNP, ("Ext2PnpSupriseRemove by Ext2Pnp ...\n"));
CcWaitForCurrentLazyWriterActivity();
ExAcquireResourceExclusiveLite(
&Vcb->MainResource, TRUE );
Status = Ext2LockVcb(Vcb, IrpContext->FileObject);
ExReleaseResourceLite(&Vcb->MainResource);
//
// Setup the Irp. We'll send it to the lower disk driver.
//
IoCopyCurrentIrpStackLocationToNext(IrpContext->Irp);
KeInitializeEvent( &Event, NotificationEvent, FALSE );
IoSetCompletionRoutine( IrpContext->Irp,
Ext2PnpCompletionRoutine,
&Event,
TRUE,
TRUE,
TRUE );
Status = IoCallDriver( Vcb->TargetDeviceObject,
IrpContext->Irp);
if (Status == STATUS_PENDING) {
KeWaitForSingleObject( &Event,
Executive,
KernelMode,
FALSE,
NULL );
Status = IrpContext->Irp->IoStatus.Status;
}
/* purge volume cache */
Ext2PurgeVolume(Vcb, FALSE);
/* dismount volume */
bDeleted = Ext2CheckDismount(IrpContext, Vcb, TRUE);
SetLongFlag(Vcb->Flags, VCB_DEVICE_REMOVED);
} __finally {
IrpContext->Irp->IoStatus.Status = Status;
Ext2CompleteRequest(
IrpContext->Irp, FALSE, (CCHAR)(NT_SUCCESS(Status)?
IO_DISK_INCREMENT : IO_NO_INCREMENT) );
IrpContext->Irp = NULL;
}
return Status;
}
NTSTATUS
Ext2PnpCancelRemove (
PEXT2_IRP_CONTEXT IrpContext,
PEXT2_VCB Vcb
)
{
NTSTATUS Status;
DEBUG(DL_PNP, ("Ext2PnpCancelRemove by Ext2Pnp ...\n"));
ExAcquireResourceExclusiveLite(
&Vcb->MainResource, TRUE );
Status = Ext2UnlockVcb(Vcb, IrpContext->FileObject);
ExReleaseResourceLite(&Vcb->MainResource);
IoSkipCurrentIrpStackLocation(IrpContext->Irp);
Status = IoCallDriver(Vcb->TargetDeviceObject, IrpContext->Irp);
IrpContext->Irp = NULL;
return Status;
}
#endif //(_WIN32_WINNT >= 0x0500)
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