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25250f40e2
Virtual devices (e.g., VXLAN) that do not have a notion of a carrier are created with an "UNKNOWN" operational state which some users find confusing [1]. It is possible to set the operational state from user space either during device creation or afterwards and some applications will start doing that in order to avoid the above problem. Add a test for this functionality to ensure it does not regress. [1] https://lore.kernel.org/netdev/20241119153703.71f97b76@hermes.local/ Reviewed-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20250717125151.466882-1-idosch@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.