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In case an XDP program is attached, reserve XDP_PACKET_HEADROOM bytes at the beginning of the packet for the program to play with. Modify the XDP logic in the driver to fill-in the missing bits and re-calculate offsets and length after the program has finished running to properly reflect the current status of the packet. We can then go and remove the limitation of not supporting XDP programs where xdp_adjust_head is set. Signed-off-by: Yuval Mintz <Yuval.Mintz@cavium.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.