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In packet offload mode, append Security Association (SA) information to each packet, replicating the crypto offload implementation. The XFRM_XMIT flag is set to enable packet to be returned immediately from the validate_xmit_xfrm function, thus aligning with the existing code path for packet offload mode. This SA info helps HW offload match packets to their correct security policies. The XFRM interface ID is included, which is crucial in setups with multiple XFRM interfaces where source/destination addresses alone can't pinpoint the right policy. Signed-off-by: wangfe <wangfe@google.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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 reStructuredText 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.