2.3.79 FSCTL_SET_OBJECT_ID_EXTENDED Request
The FSCTL_SET_OBJECT_ID_EXTENDED request message requests that the server set the extended information for the file or directory associated with the handle on which this FSCTL was invoked. The message contains an EXTENDED_INFO data element.
The EXTENDED_INFO data element is defined as follows.
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ExtendedInfo (48 bytes) |
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ExtendedInfo (48 bytes): A 48-byte binary large object(BLOB) containing user-defined extended data that was passed to this FSCTL by an application. In this situation, the user refers to the implementer who is calling this FSCTL, meaning the extended info is opaque to NTFS; there are no rules enforced by NTFS as to what these last 48 bytes contain. Contrast this with the first 16 bytes of an object ID, which can be used to open the file, so NTFS requires that they be unique within a volume.<79>