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Verify that TCP connections use both routes when connecting multiple times to a remote service over a two nexthop multipath route. Use socat to create the connections. Use tc prio + tc filter to count routes taken, counting SYN packets across the two egress devices. Also verify that the saddr matches that of the device. To avoid flaky tests when testing inherently randomized behavior, set a low bar and pass if even a single SYN is observed on each device. Signed-off-by: Willem de Bruijn <willemb@google.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Tested-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/20250424143549.669426-4-willemdebruijn.kernel@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.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.