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John Hurley says: ==================== Support tunnels over VLAN in NFP This patchset deals with tunnel encap and decap when the end-point IP address is on an internal port (for example and OvS VLAN port). Tunnel encap without VLAN is already supported in the NFP driver. This patchset extends that to include a push VLAN along with tunnel header push. Patches 1-4 extend the flow_offload IR API to include actions that use skbedit to set the ptype of an SKB and that send a packet to port ingress from the act_mirred module. Such actions are used in flower rules that forward tunnel packets to internal ports where they can be decapsulated. OvS and its TC API is an example of a user-space app that produces such rules. Patch 5 modifies the encap offload code to allow the pushing of a VLAN header after a tunnel header push. Patches 6-10 deal with tunnel decap when the end-point is on an internal port. They detect 'pre-tunnel rules' which do not deal with tunnels themselves but, rather, forward packets to internal ports where they can be decapped if required. Such rules are offloaded to a table in HW along with an indication of whether packets need to be passed to this table of not (based on their destination MAC address). Matching against this table prior to decapsulation in HW allows the correct parsing and handling of outer VLANs on tunnelled packets and the correct updating of stats for said 'pre-tunnel' rules. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.