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939b9c6890
Add a test for using xdp_md as a context to BPF_PROG_TEST_RUN for XDP programs. The test uses a BPF program that takes in a return value from XDP meta data, then reduces the size of the XDP meta data by 4 bytes. Test cases validate the possible failure cases for passing in invalid xdp_md contexts, that the return value is successfully passed in, and that the adjusted meta data is successfully copied out. Co-developed-by: Cody Haas <chaas@riotgames.com> Co-developed-by: Lisa Watanabe <lwatanabe@riotgames.com> Signed-off-by: Cody Haas <chaas@riotgames.com> Signed-off-by: Lisa Watanabe <lwatanabe@riotgames.com> Signed-off-by: Zvi Effron <zeffron@riotgames.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Yonghong Song <yhs@fb.com> Link: https://lore.kernel.org/bpf/20210707221657.3985075-5-zeffron@riotgames.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 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.