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Saeed Mahameed says: ==================== devlink eswitch inactive mode Before having traffic flow through an eswitch, a user may want to have the ability to block traffic towards the FDB until FDB is fully programmed and the user is ready to send traffic to it. For example: when two eswitches are present for vports in a multi-PF setup, one eswitch may take over the traffic from the other when the user chooses. Before this take over, a user may want to first program the inactive eswitch and then once ready redirect traffic to this new eswitch. This series introduces a user-configurable mode for an eswitch that allows dynamically switching between active and inactive modes. When inactive, traffic does not flow through the eswitch. While inactive, steering pipeline configuration can be done (e.g. adding TC rules, discovering representors, enabling the desired SDN modes such as bridge/OVS/DPDK/etc). Once configuration is completed, a user can set the eswitch mode to active and have traffic flow through. This allows admins to upgrade forwarding pipeline rules with very minimal downtime and packet drops. A user can start the eswitch in switchdev or switchdev_inactive mode. Active: Traffic is enabled on this eswitch FDB. Inactive: Traffic is ignored/dropped on this eswitch FDB. An example use case: $ devlink dev eswitch set pci/0000:08:00.1 mode switchdev_inactive Setup FDB pipeline and netdev representors ... Once ready to start receiving traffic $ devlink dev eswitch set pci/0000:08:00.1 mode switchdev v2: https://lore.kernel.org/all/20251107000831.157375-1-saeed@kernel.org/ v1: https://lore.kernel.org/all/20251016013618.2030940-1-saeed@kernel.org/ ==================== Link: https://patch.msgid.link/20251108070404.1551708-1-saeed@kernel.org 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.