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Petr Machata says: ==================== selftests: Preparations for out-of-order-operations patches in mlxsw The mlxsw driver currently makes the assumption that the user applies configuration in a bottom-up manner. Thus netdevices need to be added to the bridge before IP addresses are configured on that bridge or SVI added on top of it. Enslaving a netdevice to another netdevice that already has uppers is in fact forbidden by mlxsw for this reason. Despite this safety, it is rather easy to get into situations where the offloaded configuration is just plain wrong. Over the course of the following several patchsets, mlxsw code is going to be adjusted to diminish the space of wrongly offloaded configurations. Ideally the offload state will reflect the actual state, regardless of the sequence of operation used to construct that state. Several selftests build configurations that will not be offloadable in the future on some systems. The reason is that what will get offloaded is the actual configuration, not the configuration steps. For example, when a port is added to a bridge that has an IP address, that bridge will get a RIF, which it would not have with the current code. But on Nvidia Spectrum-1 machines, MAC addresses of all RIFs need to have the same prefix, which the bridge will violate. The RIF thus couldn't be created, and the enslavement is therefore canceled, because it would lead to an unoffloadable configuration. This breaks some selftests. In this patchset, adjust selftests to avoid the configurations that mlxsw would be incapable of offloading, while maintaining relevance with regards to the feature that is being tested. There are generally two cases of fixes: - Disabling IPv6 autogen on bridges that do not participate in routing, either because of the abovementioned requirement to keep the same MAC prefix on all in-HW router interfaces, or, on 802.1ad bridges, because in-HW router interfaces are not supported at all. - Setting the bridge MAC address to what it will become after the first member port is attached, so that the in-HW router interface is created with a supported MAC address. The patchset is then split thus: - Patches #1-#7 adjust generic selftests - Patches #8-#16 adjust mlxsw-specific selftests ==================== Link: https://lore.kernel.org/r/cover.1687265905.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@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 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.