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9b85f11efa
This patch adds a subtest named test_subflow in test_mptcp to load and verify the newly added MPTCP subflow BPF program. To goal is to make sure it is possible to set different socket options per subflows, while the userspace socket interface only lets the application to set the same socket options for the whole MPTCP connection and its multiple subflows. To check that, a client and a server are started in a dedicated netns, with veth interfaces to simulate multiple paths. They will exchange data to allow the creation of an additional subflow. When the different subflows are being created, the new MPTCP subflow BPF program will set some socket options: marks and TCP CC. The validation is done by the same program, when the userspace checks the value of the modified socket options. On the userspace side, it will see that the default values are still being used on the MPTCP connection, while the BPF program will see different options set per subflow of the same MPTCP connection. Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/76 Signed-off-by: Geliang Tang <tanggeliang@kylinos.cn> Reviewed-by: Mat Martineau <martineau@kernel.org> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org> Link: https://lore.kernel.org/r/20240926-upstream-bpf-next-20240506-mptcp-subflow-test-v7-3-d26029e15cdd@kernel.org Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org> |
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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 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.