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Pre-tunnel rules are TC flower and OvS rules that forward a packet to the tunnel end point where it can then pass through the network stack and be decapsulated. These are required if the tunnel end point is, say, an OvS internal port. Currently, firmware determines that a packet is in a tunnel and decaps it if it has a known destination IP and MAC address. However, this bypasses the flower pre-tunnel rule and so does not update the stats. Further to this it ignores VLANs that may exist outside of the tunnel header. Offload pre-tunnel rules to the NFP. This embeds the pre-tunnel rule into the tunnel decap process based on (firmware) mac index and VLAN. This means that decap can be carried out correctly with VLANs and that stats can be updated for all kernel rules correctly. Signed-off-by: John Hurley <john.hurley@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.