KsQueryInformationFile - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ks.h
KSDDKAPI NTSTATUS KsQueryInformationFile(
[in] PFILE_OBJECT FileObject,
[out] PVOID FileInformation,
[in] ULONG Length,
[in] FILE_INFORMATION_CLASS FileInformationClass
);
View the official Windows Driver Kit DDI referenceNo description available.
The KsQueryInformationFile function performs an information query against the specified file object. The function attempts to use FastIoDispatch if possible, or it generates an information request against the device object.
FileObject [in]Specifies the file object from which to query the standard information.
FileInformation [out]Indicates the place in which to put the file information. This is assumed to be a valid or probed address.
Length [in]Specifies the correct length of the FileInformation buffer.
FileInformationClass [in]Specifies the class of information being requested.
The KsQueryInformationFile function returns STATUS_SUCCESS if successful, or if unsuccessful it returns a query error.
The KsQueryInformationFile function should only be used in cases where the query would result in an actual request to the underlying driver. For example, FilePositionInformation would not generate such a request and should not be used. It assumes the caller is serializing access to the file for operations against a FO_SYNCHRONOUS_IO file object.