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I am trying to modify a reparse buffer for a FSCTL_SET_REPARSE_POINT operation. The change is done via modifying the buffer with an extra folder name and using FltFsControlFile, although identical results arise when the call is just passed through and result checked in the postop.
I am getting STATUS_IO_REPARSE_DATA_INVALID error. I verified that the size is correct:
ReparseBuffer.ReparseDataLength is PrintNameOffset+PrintNameLength (since the print name offset is larger than the reparse name offset)
Also verified that:
PrintNameOffset is < ReparseNameLength + ReparseNameOffset
What else could be causing this NTSTATUS?
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