// wdm.h

VOID IoUpdateLinkShareAccessEx(
  PFILE_OBJECT       FileObject,
  PSHARE_ACCESS      ShareAccess,
  PLINK_SHARE_ACCESS LinkShareAccess,
  ULONG              IoShareAccessFlags
);
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Windows Driver Kit DDI reference (nf-wdm-ioupdatelinkshareaccessex)

IoUpdateLinkShareAccessEx function

Description

The IoUpdateLinkShareAccessEx routine updates the access and share access for the given file object.

Parameters

`FileObject`

Pointer to the file object, which usually is being closed by the current thread.

`ShareAccess`

A pointer to the common share-access data structure that is associated with FileObject. Drivers should treat this structure as opaque.

`LinkShareAccess`

A pointer to the common link share-access data structure (LINK_SHARE_ACCESS) that is associated with FileObject. Drivers should treat this structure as opaque.

`IoShareAccessFlags`

A bitmask of these flags:

IO_SHARE_ACCESS_NON_PRIMARY_STREAM (0x00000080) specifies that the stream is neither the primary data stream nor a directory stream.

Remarks

Before calling IoUpdateLinkShareAccessEx, the driver must successfully call IoCheckLinkShareAccess with the Update parameter set to FALSE.

IoUpdateLinkShareAccessEx - NtDoc