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- Small optimization: don't bother to get the File System Listhead we'll parse if we're going to fail because of wrong VPB flags later... get the list only after we're sure we need it.

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svn path=/trunk/; revision=22766
This commit is contained in:
Alex Ionescu 2006-07-02 06:18:55 +00:00
parent ff429eb9f3
commit 130980ccde
1 changed files with 20 additions and 21 deletions
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41
reactos/ntoskrnl/io/iomgr/volume.c
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@ -316,10 +316,9 @@ IopMountVolume(IN PDEVICE_OBJECT DeviceObject,
PIRP Irp;
PIO_STACK_LOCATION StackPtr;
PLIST_ENTRY FsList, ListEntry;
PDEVICE_OBJECT ParentFsDeviceObject;
PDEVICE_OBJECT AttachedDeviceObject = DeviceObject;
PDEVICE_OBJECT FileSystemDeviceObject;
LIST_ENTRY LocalList;
PDEVICE_OBJECT AttachedDeviceObject = DeviceObject;
PDEVICE_OBJECT FileSystemDeviceObject, ParentFsDeviceObject;
ULONG FsStackOverhead;
PAGED_CODE();
@ -343,24 +342,6 @@ IopMountVolume(IN PDEVICE_OBJECT DeviceObject,
KeEnterCriticalRegion();
ExAcquireResourceSharedLite(&FileSystemListLock, TRUE);
/* For a mount operation, this can only be a Disk, CD-ROM or tape */
if ((DeviceObject->DeviceType == FILE_DEVICE_DISK) ||
(DeviceObject->DeviceType == FILE_DEVICE_VIRTUAL_DISK))
{
/* Use the disk list */
FsList = &IopDiskFsListHead;
}
else if (DeviceObject->DeviceType == FILE_DEVICE_CD_ROM)
{
/* Use the CD-ROM list */
FsList = &IopCdRomFsListHead;
}
else
{
/* It's gotta be a tape... */
FsList = &IopTapeFsListHead;
}
/* Make sure we weren't already mounted */
if (!(DeviceObject->Vpb->Flags & (VPB_MOUNTED | VPB_REMOVE_PENDING)))
{
@ -377,6 +358,24 @@ IopMountVolume(IN PDEVICE_OBJECT DeviceObject,
/* Reference it */
ObReferenceObject(AttachedDeviceObject);
/* For a mount operation, this can only be a Disk, CD-ROM or tape */
if ((DeviceObject->DeviceType == FILE_DEVICE_DISK) ||
(DeviceObject->DeviceType == FILE_DEVICE_VIRTUAL_DISK))
{
/* Use the disk list */
FsList = &IopDiskFsListHead;
}
else if (DeviceObject->DeviceType == FILE_DEVICE_CD_ROM)
{
/* Use the CD-ROM list */
FsList = &IopCdRomFsListHead;
}
else
{
/* It's gotta be a tape... */
FsList = &IopTapeFsListHead;
}
/* Now loop the fs list until one of the file systems accepts us */
Status = STATUS_UNSUCCESSFUL;
ListEntry = FsList->Flink;