xdr_read_pages - Ensure page-based XDR data to decode is aligned at current pointer position
unsigned int xdr_read_pages(struct xdr_stream * xdr, unsigned int len);
Moves data beyond the current pointer position from the XDR head buffer into the page list. Any data that lies beyond current position + “len” bytes is moved into the XDR tail.
Returns the number of XDR encoded bytes now contained in the pages
|January 2017||Kernel Hackers Manual 4.8.|