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30b0cf90c6
Provide an API to restore the ct state pointer. This may be used by drivers to restore the ct state if they miss in tc chain after they already did the hardware connection tracking action (ct_metadata action). For example, consider the following rule on chain 0 that is in_hw, however chain 1 is not_in_hw: $ tc filter add dev ... chain 0 ... \ flower ... action ct pipe action goto chain 1 Packets of a flow offloaded (via nf flow table offload) by the driver hit this rule in hardware, will be marked with the ct metadata action (mark, label, zone) that does the equivalent of the software ct action, and when the packet jumps to hardware chain 1, there would be a miss. CT was already processed in hardware. Therefore, the driver's miss handling should restore the ct state on the skb, using the provided API, and continue the packet processing in chain 1. Signed-off-by: Paul Blakey <paulb@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> 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.