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https://github.com/reactos/reactos.git
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1023 lines
30 KiB
C
1023 lines
30 KiB
C
/*++
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Copyright (C) Microsoft Corporation, 1991 - 2010
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Module Name:
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class.c
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Abstract:
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SCSI class driver routines
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Environment:
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kernel mode only
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Notes:
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Revision History:
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--*/
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#define CLASS_INIT_GUID 0
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#include "classp.h"
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#include "debug.h"
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#ifdef DEBUG_USE_WPP
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#include "create.tmh"
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#endif
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ULONG BreakOnClose = 0;
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const PCSZ LockTypeStrings[] = {
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"Simple",
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"Secure",
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"Internal"
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};
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VOID
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ClasspCleanupDisableMcn(
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IN PFILE_OBJECT_EXTENSION FsContext
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);
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, ClassCreateClose)
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#pragma alloc_text(PAGE, ClasspCreateClose)
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#pragma alloc_text(PAGE, ClasspCleanupProtectedLocks)
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#pragma alloc_text(PAGE, ClasspEjectionControl)
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#pragma alloc_text(PAGE, ClasspCleanupDisableMcn)
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#pragma alloc_text(PAGE, ClassGetFsContext)
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#endif
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NTSTATUS
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NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
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ClassCreateClose(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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SCSI class driver create and close routine. This is called by the I/O system
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when the device is opened or closed.
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Arguments:
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DriverObject - Pointer to driver object created by system.
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Irp - IRP involved.
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Return Value:
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Device-specific drivers return value or STATUS_SUCCESS.
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--*/
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{
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PCOMMON_DEVICE_EXTENSION commonExtension = DeviceObject->DeviceExtension;
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ULONG removeState;
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NTSTATUS status;
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PAGED_CODE();
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//
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// If we're getting a close request then we know the device object hasn't
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// been completely destroyed. Let the driver cleanup if necessary.
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//
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removeState = ClassAcquireRemoveLock(DeviceObject, Irp);
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//
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// Invoke the device-specific routine, if one exists. Otherwise complete
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// with SUCCESS
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//
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if((removeState == NO_REMOVE) ||
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IS_CLEANUP_REQUEST(IoGetCurrentIrpStackLocation(Irp)->MajorFunction)) {
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status = ClasspCreateClose(DeviceObject, Irp);
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if((NT_SUCCESS(status)) &&
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(commonExtension->DevInfo->ClassCreateClose)) {
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return commonExtension->DevInfo->ClassCreateClose(DeviceObject, Irp);
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}
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} else {
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status = STATUS_DEVICE_DOES_NOT_EXIST;
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}
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Irp->IoStatus.Status = status;
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ClassReleaseRemoveLock(DeviceObject, Irp);
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ClassCompleteRequest(DeviceObject, Irp, IO_NO_INCREMENT);
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return status;
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}
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NTSTATUS
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ClasspCreateClose(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp
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)
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/*++
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Routine Description:
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This routine will handle create/close operations for a given classpnp
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device if the class driver doesn't supply it's own handler. If there
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is a file object supplied for our driver (if it's a FO_DIRECT_DEVICE_OPEN
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file object) then it will initialize a file extension on create or destroy
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the extension on a close.
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Arguments:
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DeviceObject - the device object being opened or closed.
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Irp - the create/close irp
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Return Value:
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status
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--*/
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{
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PCOMMON_DEVICE_EXTENSION commonExtension = DeviceObject->DeviceExtension;
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PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
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PFILE_OBJECT fileObject = irpStack->FileObject;
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NTSTATUS status = STATUS_SUCCESS;
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PAGED_CODE();
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//
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// ISSUE-2000/3/28-henrygab - if lower stack fails create/close, we end up
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// in an inconsistent state. re-write to verify all args and allocate all
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// required resources, then pass the irp down, then complete the
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// transaction. this is because we also cannot forward the irp, then fail
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// it after it has succeeded a lower-level driver.
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//
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if(irpStack->MajorFunction == IRP_MJ_CREATE) {
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PIO_SECURITY_CONTEXT securityContext =
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irpStack->Parameters.Create.SecurityContext;
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCREATEClose: create received for device %p\n",
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DeviceObject));
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCREATEClose: desired access %lx\n",
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securityContext->DesiredAccess));
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCREATEClose: file object %p\n",
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irpStack->FileObject));
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NT_ASSERT(BreakOnClose == FALSE);
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if(irpStack->FileObject != NULL) {
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PFILE_OBJECT_EXTENSION fsContext;
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//
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// Allocate our own file object extension for this device object.
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//
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status = AllocateDictionaryEntry(
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&commonExtension->FileObjectDictionary,
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(ULONGLONG) irpStack->FileObject,
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sizeof(FILE_OBJECT_EXTENSION),
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CLASS_TAG_FILE_OBJECT_EXTENSION,
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(PVOID *)&fsContext);
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if(NT_SUCCESS(status)) {
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RtlZeroMemory(fsContext,
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sizeof(FILE_OBJECT_EXTENSION));
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fsContext->FileObject = irpStack->FileObject;
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fsContext->DeviceObject = DeviceObject;
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} else if (status == STATUS_OBJECT_NAME_COLLISION) {
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status = STATUS_SUCCESS;
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}
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}
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} else {
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCreateCLOSE: close received for device %p\n",
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DeviceObject));
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCreateCLOSE: file object %p\n",
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fileObject));
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if(irpStack->FileObject != NULL) {
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PFILE_OBJECT_EXTENSION fsContext =
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ClassGetFsContext(commonExtension, irpStack->FileObject);
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCreateCLOSE: file extension %p\n",
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fsContext));
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if(fsContext != NULL) {
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCreateCLOSE: extension is ours - "
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"freeing\n"));
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NT_ASSERT(BreakOnClose == FALSE);
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ClasspCleanupProtectedLocks(fsContext);
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ClasspCleanupDisableMcn(fsContext);
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FreeDictionaryEntry(&(commonExtension->FileObjectDictionary),
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fsContext);
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}
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}
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}
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//
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// Notify the lower levels about the create or close operation - give them
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// a chance to cleanup too.
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//
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCreateClose: %s for devobj %p\n",
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(NT_SUCCESS(status) ? "Success" : "FAILED"),
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DeviceObject));
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if(NT_SUCCESS(status)) {
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KEVENT event;
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//
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// Set up the event to wait on
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//
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KeInitializeEvent(&event, SynchronizationEvent, FALSE);
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IoCopyCurrentIrpStackLocationToNext(Irp);
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IoSetCompletionRoutine( Irp, ClassSignalCompletion, &event,
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TRUE, TRUE, TRUE);
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status = IoCallDriver(commonExtension->LowerDeviceObject, Irp);
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if(status == STATUS_PENDING) {
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(VOID)KeWaitForSingleObject(&event,
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Executive,
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KernelMode,
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FALSE,
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NULL);
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status = Irp->IoStatus.Status;
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}
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if (!NT_SUCCESS(status)) {
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TracePrint((TRACE_LEVEL_ERROR, TRACE_FLAG_INIT,
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"ClasspCreateClose: Lower driver failed, but we "
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"succeeded. This is a problem, lock counts will be "
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"out of sync between levels.\n"));
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}
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}
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return status;
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}
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VOID
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ClasspCleanupProtectedLocks(
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IN PFILE_OBJECT_EXTENSION FsContext
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)
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{
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PCOMMON_DEVICE_EXTENSION commonExtension =
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FsContext->DeviceObject->DeviceExtension;
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PFUNCTIONAL_DEVICE_EXTENSION fdoExtension =
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commonExtension->PartitionZeroExtension;
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ULONG newDeviceLockCount = 1;
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PAGED_CODE();
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCleanupProtectedLocks called for %p\n",
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FsContext->DeviceObject));
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCleanupProtectedLocks - FsContext %p is locked "
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"%d times\n", FsContext, FsContext->LockCount));
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NT_ASSERT(BreakOnClose == FALSE);
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//
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// Synchronize with ejection and ejection control requests.
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//
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KeEnterCriticalRegion();
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(VOID)KeWaitForSingleObject(&(fdoExtension->EjectSynchronizationEvent),
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UserRequest,
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KernelMode,
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FALSE,
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NULL);
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//
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// For each secure lock on this handle decrement the secured lock count
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// for the FDO. Keep track of the new value.
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//
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if (FsContext->LockCount != 0) {
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do {
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InterlockedDecrement((volatile LONG *)&FsContext->LockCount);
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newDeviceLockCount =
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InterlockedDecrement(&fdoExtension->ProtectedLockCount);
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} while (FsContext->LockCount > 0);
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//
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// If the new lock count has been dropped to zero then issue a lock
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// command to the device.
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//
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCleanupProtectedLocks: FDO secured lock count = %d "
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"lock count = %d\n",
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fdoExtension->ProtectedLockCount,
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fdoExtension->LockCount));
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if ((newDeviceLockCount == 0) && (fdoExtension->LockCount == 0)) {
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SCSI_REQUEST_BLOCK srb = {0};
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UCHAR srbExBuffer[CLASS_SRBEX_SCSI_CDB16_BUFFER_SIZE] = {0};
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PSTORAGE_REQUEST_BLOCK srbEx = (PSTORAGE_REQUEST_BLOCK)srbExBuffer;
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PCDB cdb = NULL;
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NTSTATUS status;
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PSCSI_REQUEST_BLOCK srbPtr;
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCleanupProtectedLocks: FDO lock count dropped "
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"to zero\n"));
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if (fdoExtension->AdapterDescriptor->SrbType == SRB_TYPE_STORAGE_REQUEST_BLOCK) {
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#ifdef _MSC_VER
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#pragma prefast(suppress:26015, "InitializeStorageRequestBlock ensures buffer access is bounded")
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#endif
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status = InitializeStorageRequestBlock(srbEx,
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STORAGE_ADDRESS_TYPE_BTL8,
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sizeof(srbExBuffer),
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1,
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SrbExDataTypeScsiCdb16);
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if (NT_SUCCESS(status)) {
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srbEx->TimeOutValue = fdoExtension->TimeOutValue;
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SrbSetCdbLength(srbEx, 6);
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cdb = SrbGetCdb(srbEx);
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srbPtr = (PSCSI_REQUEST_BLOCK)srbEx;
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} else {
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//
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// Should not happen. Revert to legacy SRB.
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//
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NT_ASSERT(FALSE);
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srb.TimeOutValue = fdoExtension->TimeOutValue;
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srb.CdbLength = 6;
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cdb = (PCDB) &(srb.Cdb);
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srbPtr = &srb;
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}
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} else {
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srb.TimeOutValue = fdoExtension->TimeOutValue;
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srb.CdbLength = 6;
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cdb = (PCDB) &(srb.Cdb);
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srbPtr = &srb;
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}
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cdb->MEDIA_REMOVAL.OperationCode = SCSIOP_MEDIUM_REMOVAL;
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//
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// TRUE - prevent media removal.
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// FALSE - allow media removal.
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//
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cdb->MEDIA_REMOVAL.Prevent = FALSE;
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status = ClassSendSrbSynchronous(fdoExtension->DeviceObject,
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srbPtr,
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NULL,
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0,
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FALSE);
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_INIT,
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"ClasspCleanupProtectedLocks: unlock request to drive "
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"returned status %lx\n", status));
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}
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}
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KeSetEvent(&fdoExtension->EjectSynchronizationEvent,
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IO_NO_INCREMENT,
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FALSE);
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KeLeaveCriticalRegion();
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return;
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}
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VOID
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ClasspCleanupDisableMcn(
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IN PFILE_OBJECT_EXTENSION FsContext
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)
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{
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PCOMMON_DEVICE_EXTENSION commonExtension =
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FsContext->DeviceObject->DeviceExtension;
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PFUNCTIONAL_DEVICE_EXTENSION fdoExtension =
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commonExtension->PartitionZeroExtension;
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PAGED_CODE();
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_MCN,
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"ClasspCleanupDisableMcn called for %p\n",
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FsContext->DeviceObject));
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_MCN,
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"ClasspCleanupDisableMcn - FsContext %p is disabled "
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"%d times\n", FsContext, FsContext->McnDisableCount));
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//
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// For each secure lock on this handle decrement the secured lock count
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// for the FDO. Keep track of the new value.
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//
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while(FsContext->McnDisableCount != 0) {
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FsContext->McnDisableCount--;
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ClassEnableMediaChangeDetection(fdoExtension);
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}
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return;
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}
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#if 1
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/*
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* ISSUE: REMOVE this old function implementation as soon as the
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* boottime pagefile problems with the new one (below)
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* are resolved.
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*/
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NTSTATUS
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ClasspEjectionControl(
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IN PDEVICE_OBJECT Fdo,
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IN PIRP Irp,
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IN MEDIA_LOCK_TYPE LockType,
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IN BOOLEAN Lock
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)
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{
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PFUNCTIONAL_DEVICE_EXTENSION FdoExtension = Fdo->DeviceExtension;
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PCOMMON_DEVICE_EXTENSION commonExtension =
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(PCOMMON_DEVICE_EXTENSION) FdoExtension;
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PFILE_OBJECT_EXTENSION fsContext = NULL;
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NTSTATUS status;
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PSCSI_REQUEST_BLOCK srb = NULL;
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BOOLEAN countChanged = FALSE;
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PAGED_CODE();
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/*
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* Ensure that the user thread is not suspended while we are holding EjectSynchronizationEvent.
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*/
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KeEnterCriticalRegion();
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status = KeWaitForSingleObject(
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&(FdoExtension->EjectSynchronizationEvent),
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UserRequest,
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KernelMode,
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FALSE,
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NULL);
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NT_ASSERT(status == STATUS_SUCCESS);
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TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_IOCTL,
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"ClasspEjectionControl: "
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"Received request for %s lock type\n",
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LockTypeStrings[LockType]
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));
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_SEH2_TRY {
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PCDB cdb = NULL;
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//
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// Determine if this is a "secured" request.
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//
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if (LockType == SecureMediaLock) {
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PIO_STACK_LOCATION irpStack = IoGetCurrentIrpStackLocation(Irp);
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PFILE_OBJECT fileObject = irpStack->FileObject;
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//
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// Make sure that the file object we are supplied has a
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// proper FsContext before we try doing a secured lock.
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//
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if (fileObject != NULL) {
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fsContext = ClassGetFsContext(commonExtension, fileObject);
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}
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if (fsContext == NULL) {
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//
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// This handle isn't setup correctly. We can't let the
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// operation go.
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//
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status = STATUS_INVALID_PARAMETER;
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_SEH2_LEAVE;
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}
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}
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if (Lock) {
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//
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// This is a lock command. Reissue the command in case bus or
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// device was reset and the lock was cleared.
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// note: may need to decrement count if actual lock operation
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// failed....
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//
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switch (LockType) {
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case SimpleMediaLock: {
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FdoExtension->LockCount++;
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countChanged = TRUE;
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break;
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}
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case SecureMediaLock: {
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fsContext->LockCount++;
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FdoExtension->ProtectedLockCount++;
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countChanged = TRUE;
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break;
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}
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case InternalMediaLock: {
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FdoExtension->InternalLockCount++;
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countChanged = TRUE;
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break;
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}
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}
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} else {
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|
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//
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// This is an unlock command. If it's a secured one then make sure
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// the caller has a lock outstanding or return an error.
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// note: may need to re-increment the count if actual unlock
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// operation fails....
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//
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switch (LockType) {
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case SimpleMediaLock: {
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if(FdoExtension->LockCount != 0) {
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FdoExtension->LockCount--;
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countChanged = TRUE;
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}
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break;
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}
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case SecureMediaLock: {
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if(fsContext->LockCount == 0) {
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status = STATUS_INVALID_DEVICE_STATE;
|
|
_SEH2_LEAVE;
|
|
}
|
|
fsContext->LockCount--;
|
|
FdoExtension->ProtectedLockCount--;
|
|
countChanged = TRUE;
|
|
break;
|
|
}
|
|
|
|
case InternalMediaLock: {
|
|
NT_ASSERT(FdoExtension->InternalLockCount != 0);
|
|
FdoExtension->InternalLockCount--;
|
|
countChanged = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
//
|
|
// We only send an unlock command to the drive if both the
|
|
// secured and unsecured lock counts have dropped to zero.
|
|
//
|
|
|
|
if ((FdoExtension->ProtectedLockCount != 0) ||
|
|
(FdoExtension->InternalLockCount != 0) ||
|
|
(FdoExtension->LockCount != 0)) {
|
|
|
|
status = STATUS_SUCCESS;
|
|
_SEH2_LEAVE;
|
|
}
|
|
}
|
|
|
|
status = STATUS_SUCCESS;
|
|
if (TEST_FLAG(Fdo->Characteristics, FILE_REMOVABLE_MEDIA)) {
|
|
|
|
srb = (PSCSI_REQUEST_BLOCK)ClasspAllocateSrb(FdoExtension);
|
|
|
|
if (srb == NULL) {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
if (FdoExtension->AdapterDescriptor->SrbType == SRB_TYPE_STORAGE_REQUEST_BLOCK) {
|
|
|
|
//
|
|
// NOTE - this is based on size used in ClasspAllocateSrb
|
|
//
|
|
|
|
status = InitializeStorageRequestBlock((PSTORAGE_REQUEST_BLOCK)srb,
|
|
STORAGE_ADDRESS_TYPE_BTL8,
|
|
CLASS_SRBEX_SCSI_CDB16_BUFFER_SIZE,
|
|
1,
|
|
SrbExDataTypeScsiCdb16);
|
|
if (!NT_SUCCESS(status)) {
|
|
NT_ASSERT(FALSE);
|
|
_SEH2_LEAVE;
|
|
}
|
|
|
|
} else {
|
|
RtlZeroMemory(srb, sizeof(SCSI_REQUEST_BLOCK));
|
|
}
|
|
|
|
SrbSetCdbLength(srb, 6);
|
|
cdb = SrbGetCdb(srb);
|
|
NT_ASSERT(cdb != NULL);
|
|
|
|
cdb->MEDIA_REMOVAL.OperationCode = SCSIOP_MEDIUM_REMOVAL;
|
|
|
|
//
|
|
// TRUE - prevent media removal.
|
|
// FALSE - allow media removal.
|
|
//
|
|
|
|
cdb->MEDIA_REMOVAL.Prevent = Lock;
|
|
|
|
//
|
|
// Set timeout value.
|
|
//
|
|
|
|
SrbSetTimeOutValue(srb, FdoExtension->TimeOutValue);
|
|
|
|
//
|
|
// The actual lock operation on the device isn't so important
|
|
// as the internal lock counts. Ignore failures.
|
|
//
|
|
|
|
status = ClassSendSrbSynchronous(FdoExtension->DeviceObject,
|
|
srb,
|
|
NULL,
|
|
0,
|
|
FALSE);
|
|
}
|
|
|
|
} _SEH2_FINALLY {
|
|
|
|
if (!NT_SUCCESS(status)) {
|
|
TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_IOCTL,
|
|
"ClasspEjectionControl: FAILED status %x -- "
|
|
"reverting lock counts\n", status));
|
|
|
|
if (countChanged) {
|
|
|
|
//
|
|
// have to revert to previous counts if the
|
|
// lock/unlock operation actually failed.
|
|
//
|
|
|
|
if (Lock) {
|
|
|
|
switch (LockType) {
|
|
|
|
case SimpleMediaLock: {
|
|
FdoExtension->LockCount--;
|
|
break;
|
|
}
|
|
|
|
case SecureMediaLock: {
|
|
fsContext->LockCount--;
|
|
FdoExtension->ProtectedLockCount--;
|
|
break;
|
|
}
|
|
|
|
case InternalMediaLock: {
|
|
FdoExtension->InternalLockCount--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
|
|
switch (LockType) {
|
|
|
|
case SimpleMediaLock: {
|
|
FdoExtension->LockCount++;
|
|
break;
|
|
}
|
|
|
|
case SecureMediaLock: {
|
|
fsContext->LockCount++;
|
|
FdoExtension->ProtectedLockCount++;
|
|
break;
|
|
}
|
|
|
|
case InternalMediaLock: {
|
|
FdoExtension->InternalLockCount++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_IOCTL,
|
|
"ClasspEjectionControl: Succeeded\n"));
|
|
|
|
}
|
|
|
|
TracePrint((TRACE_LEVEL_INFORMATION, TRACE_FLAG_IOCTL,
|
|
"ClasspEjectionControl: "
|
|
"Current Counts: Internal: %x Secure: %x Simple: %x\n",
|
|
FdoExtension->InternalLockCount,
|
|
FdoExtension->ProtectedLockCount,
|
|
FdoExtension->LockCount
|
|
));
|
|
|
|
KeSetEvent(&(FdoExtension->EjectSynchronizationEvent),
|
|
IO_NO_INCREMENT,
|
|
FALSE);
|
|
KeLeaveCriticalRegion();
|
|
|
|
if (srb) {
|
|
ClassFreeOrReuseSrb(FdoExtension, srb);
|
|
}
|
|
|
|
} _SEH2_END;
|
|
return status;
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
* ISSUE: RESTORE this (see above)
|
|
* This is a new implementation of the function that doesn't thrash memory
|
|
* or depend on the srbLookasideList.
|
|
* HOWEVER, it seems to cause pagefile initialization to fail during boot
|
|
* for some reason. Need to resolve this before switching to this function.
|
|
*/
|
|
NTSTATUS
|
|
ClasspEjectionControl(
|
|
IN PDEVICE_OBJECT Fdo,
|
|
IN PIRP Irp,
|
|
IN MEDIA_LOCK_TYPE LockType,
|
|
IN BOOLEAN Lock
|
|
)
|
|
{
|
|
PFUNCTIONAL_DEVICE_EXTENSION fdoExt = Fdo->DeviceExtension;
|
|
PFILE_OBJECT_EXTENSION fsContext;
|
|
BOOLEAN fileHandleOk = TRUE;
|
|
BOOLEAN countChanged = FALSE;
|
|
NTSTATUS status;
|
|
|
|
PAGED_CODE();
|
|
|
|
status = KeWaitForSingleObject(
|
|
&fdoExt->EjectSynchronizationEvent,
|
|
UserRequest,
|
|
KernelMode,
|
|
FALSE,
|
|
NULL);
|
|
NT_ASSERT(status == STATUS_SUCCESS);
|
|
|
|
/*
|
|
* If this is a "secured" request, we have to make sure
|
|
* that the file handle is valid.
|
|
*/
|
|
if (LockType == SecureMediaLock){
|
|
PIO_STACK_LOCATION thisSp = IoGetCurrentIrpStackLocation(Irp);
|
|
|
|
/*
|
|
* Make sure that the file object we are supplied has a
|
|
* proper FsContext before we try doing a secured lock.
|
|
*/
|
|
if (thisSp->FileObject){
|
|
PCOMMON_DEVICE_EXTENSION commonExt = (PCOMMON_DEVICE_EXTENSION)fdoExt;
|
|
fsContext = ClassGetFsContext(commonExt, thisSp->FileObject);
|
|
}
|
|
else {
|
|
fsContext = NULL;
|
|
}
|
|
|
|
if (!fsContext){
|
|
NT_ASSERT(fsContext);
|
|
fileHandleOk = FALSE;
|
|
}
|
|
}
|
|
|
|
if (fileHandleOk){
|
|
|
|
/*
|
|
* Adjust the lock counts and make sure they make sense.
|
|
*/
|
|
status = STATUS_SUCCESS;
|
|
if (Lock){
|
|
switch(LockType) {
|
|
case SimpleMediaLock:
|
|
fdoExt->LockCount++;
|
|
countChanged = TRUE;
|
|
break;
|
|
case SecureMediaLock:
|
|
fsContext->LockCount++;
|
|
fdoExt->ProtectedLockCount++;
|
|
countChanged = TRUE;
|
|
break;
|
|
case InternalMediaLock:
|
|
fdoExt->InternalLockCount++;
|
|
countChanged = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* This is an unlock command. If it's a secured one then make sure
|
|
* the caller has a lock outstanding or return an error.
|
|
*/
|
|
switch (LockType){
|
|
case SimpleMediaLock:
|
|
if (fdoExt->LockCount > 0){
|
|
fdoExt->LockCount--;
|
|
countChanged = TRUE;
|
|
}
|
|
else {
|
|
NT_ASSERT(fdoExt->LockCount > 0);
|
|
status = STATUS_INTERNAL_ERROR;
|
|
}
|
|
break;
|
|
case SecureMediaLock:
|
|
if (fsContext->LockCount > 0){
|
|
NT_ASSERT(fdoExt->ProtectedLockCount > 0);
|
|
fsContext->LockCount--;
|
|
fdoExt->ProtectedLockCount--;
|
|
countChanged = TRUE;
|
|
}
|
|
else {
|
|
NT_ASSERT(fsContext->LockCount > 0);
|
|
status = STATUS_INVALID_DEVICE_STATE;
|
|
}
|
|
break;
|
|
case InternalMediaLock:
|
|
NT_ASSERT(fdoExt->InternalLockCount > 0);
|
|
fdoExt->InternalLockCount--;
|
|
countChanged = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (NT_SUCCESS(status)){
|
|
/*
|
|
* We only send an unlock command to the drive if
|
|
* all the lock counts have dropped to zero.
|
|
*/
|
|
if (!Lock &&
|
|
(fdoExt->ProtectedLockCount ||
|
|
fdoExt->InternalLockCount ||
|
|
fdoExt->LockCount)){
|
|
|
|
/*
|
|
* The lock count is still positive, so don't unlock yet.
|
|
*/
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
else if (!TEST_FLAG(Fdo->Characteristics, FILE_REMOVABLE_MEDIA)) {
|
|
/*
|
|
* The device isn't removable media. don't send a cmd.
|
|
*/
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
else {
|
|
TRANSFER_PACKET *pkt;
|
|
|
|
pkt = DequeueFreeTransferPacket(Fdo, TRUE);
|
|
if (pkt){
|
|
KEVENT event;
|
|
|
|
/*
|
|
* Store the number of packets servicing the irp (one)
|
|
* inside the original IRP. It will be used to counted down
|
|
* to zero when the packet completes.
|
|
* Initialize the original IRP's status to success.
|
|
* If the packet fails, we will set it to the error status.
|
|
*/
|
|
Irp->Tail.Overlay.DriverContext[0] = LongToPtr(1);
|
|
Irp->IoStatus.Status = STATUS_SUCCESS;
|
|
|
|
/*
|
|
* Set this up as a SYNCHRONOUS transfer, submit it,
|
|
* and wait for the packet to complete. The result
|
|
* status will be written to the original irp.
|
|
*/
|
|
KeInitializeEvent(&event, SynchronizationEvent, FALSE);
|
|
SetupEjectionTransferPacket(pkt, Lock, &event, Irp);
|
|
SubmitTransferPacket(pkt);
|
|
(VOID)KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL);
|
|
status = Irp->IoStatus.Status;
|
|
}
|
|
else {
|
|
status = STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
status = STATUS_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (!NT_SUCCESS(status) && countChanged) {
|
|
|
|
//
|
|
// have to revert to previous counts if the
|
|
// lock/unlock operation actually failed.
|
|
//
|
|
|
|
if(Lock) {
|
|
|
|
switch(LockType) {
|
|
|
|
case SimpleMediaLock: {
|
|
FdoExtension->LockCount--;
|
|
break;
|
|
}
|
|
|
|
case SecureMediaLock: {
|
|
fsContext->LockCount--;
|
|
FdoExtension->ProtectedLockCount--;
|
|
break;
|
|
}
|
|
|
|
case InternalMediaLock: {
|
|
FdoExtension->InternalLockCount--;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
|
|
switch(LockType) {
|
|
|
|
case SimpleMediaLock: {
|
|
FdoExtension->LockCount++;
|
|
break;
|
|
}
|
|
|
|
case SecureMediaLock: {
|
|
fsContext->LockCount++;
|
|
FdoExtension->ProtectedLockCount++;
|
|
break;
|
|
}
|
|
|
|
case InternalMediaLock: {
|
|
FdoExtension->InternalLockCount++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
KeSetEvent(&fdoExt->EjectSynchronizationEvent, IO_NO_INCREMENT, FALSE);
|
|
|
|
return status;
|
|
}
|
|
#endif
|
|
|
|
_IRQL_requires_max_(PASSIVE_LEVEL)
|
|
PFILE_OBJECT_EXTENSION
|
|
NTAPI /* ReactOS Change: GCC Does not support STDCALL by default */
|
|
ClassGetFsContext(
|
|
_In_ PCOMMON_DEVICE_EXTENSION CommonExtension,
|
|
_In_ PFILE_OBJECT FileObject
|
|
)
|
|
{
|
|
PAGED_CODE();
|
|
return GetDictionaryEntry(&(CommonExtension->FileObjectDictionary),
|
|
(ULONGLONG) FileObject);
|
|
}
|