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- Add support for cases when the FSD that actually did the FO create wasn't the one to whom we went the IRP.

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- Also add support for detecting volume opens and setting the FO_VOLUME_OPEN flag.

svn path=/trunk/; revision=22933
This commit is contained in:
Alex Ionescu 2006-07-08 18:30:59 +00:00
parent 884482b6aa
commit 0a2769494f
1 changed files with 36 additions and 1 deletions
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37
reactos/ntoskrnl/io/iomgr/file.c
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@ -30,7 +30,8 @@ IopParseDevice(IN PVOID ParseObject,
OUT PVOID *Object)
{
POPEN_PACKET OpenPacket = (POPEN_PACKET)Context;
PDEVICE_OBJECT OriginalDeviceObject = (PDEVICE_OBJECT)ParseObject, DeviceObject;
PDEVICE_OBJECT OriginalDeviceObject = (PDEVICE_OBJECT)ParseObject;
PDEVICE_OBJECT DeviceObject, OwnerDevice;
NTSTATUS Status;
PFILE_OBJECT FileObject;
PVPB Vpb = NULL;
@ -431,9 +432,43 @@ IopParseDevice(IN PVOID ParseObject,
KEBUGCHECK(0);
}
/* Get the owner of the File Object */
OwnerDevice = IoGetRelatedDeviceObject(FileObject);
/*
* It's possible that the device to whom we sent the IRP to
* isn't actually the device that ended opening the file object
* internally.
*/
if (OwnerDevice != DeviceObject)
{
/* We have to de-reference the VPB we had associated */
if (Vpb) IopDereferenceVpb(Vpb);
/* And re-associate with the actual one */
Vpb = FileObject->Vpb;
if (Vpb) InterlockedIncrement(&Vpb->ReferenceCount);
}
/* Make sure we are not using a dummy */
if (!UseDummyFile)
{
/* Check if this was a volume open */
if ((!(FileObject->RelatedFileObject) ||
(FileObject->RelatedFileObject->Flags & FO_VOLUME_OPEN)) &&
!(FileObject->FileName.Length))
{
/* All signs point to it, but make sure it was actually an FSD */
if ((OwnerDevice->DeviceType == FILE_DEVICE_DISK_FILE_SYSTEM) ||
(OwnerDevice->DeviceType == FILE_DEVICE_CD_ROM_FILE_SYSTEM) ||
(OwnerDevice->DeviceType == FILE_DEVICE_TAPE_FILE_SYSTEM) ||
(OwnerDevice->DeviceType == FILE_DEVICE_FILE_SYSTEM))
{
/* The owner device is an FSD, so this is a volume open for real */
FileObject->Flags |= FO_VOLUME_OPEN;
}
}
/* Reference the object and set the parse check */
ObReferenceObject(FileObject);
*Object = FileObject;