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[NTOSKRNL] Implement IoQueryFileDosDeviceName()

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This commit is contained in:
Pierre Schweitzer 2018-10-03 11:56:21 +02:00
parent abfddca8bb
commit 4a7e89770e
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1 changed files with 51 additions and 3 deletions
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54
ntoskrnl/io/iomgr/file.c
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@ -3480,15 +3480,63 @@ IoCancelFileOpen(IN PDEVICE_OBJECT DeviceObject,
}
/*
* @unimplemented
* @implemented
*/
NTSTATUS
NTAPI
IoQueryFileDosDeviceName(IN PFILE_OBJECT FileObject,
OUT POBJECT_NAME_INFORMATION *ObjectNameInformation)
{
UNIMPLEMENTED;
return STATUS_NOT_IMPLEMENTED;
NTSTATUS Status;
ULONG Length, ReturnLength;
POBJECT_NAME_INFORMATION LocalInfo;
/* Start with a buffer length of 200 */
ReturnLength = 200;
/*
* We'll loop until query works.
* We will use returned length for next loop
* iteration, trying to have a big enough buffer.
*/
for (Length = 200; ; Length = ReturnLength)
{
/* Allocate our work buffer */
LocalInfo = ExAllocatePoolWithTag(PagedPool, Length, 'nDoI');
if (LocalInfo == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
/* Query the DOS name */
Status = IopQueryNameInternal(FileObject,
TRUE,
TRUE,
LocalInfo,
Length,
&ReturnLength,
KernelMode);
/* If it succeed, nothing more to do */
if (Status == STATUS_SUCCESS)
{
break;
}
/* Otherwise, prepare for re-allocation */
ExFreePoolWithTag(LocalInfo, 'nDoI');
/*
* If we failed because of something else
* than memory, simply stop and fail here
*/
if (Status != STATUS_BUFFER_OVERFLOW)
{
return STATUS_BUFFER_OVERFLOW;
}
}
/* Success case here: return our buffer */
*ObjectNameInformation = LocalInfo;
return STATUS_SUCCESS;
}
/*