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The ft_offloads table serves to steer packets, which are from the eswitch, to the representor associated with the packets' source vport. Previously, if a packet's source vport or metadata was not associated with any representor, it was forwarded to the uplink representor. The representor got packets it shouldn't have as they weren't coming from the uplink vport. One such effect of this breakage can be observed if the uplink representor is attached to a bridge, where such illegal packets will be broadcast to the remaining ports, flooding the switch with illegal packets. In the case where IB loopback (e.g, SNAP) is enabled, all transmitted packets would be looped back, and received by the uplink representor, and result in an infinite feedback loop. Therefore, block this hole by adding a default drop rule to the ft_offloads table, so that all unmatched packets with no associated representor are dropped. Signed-off-by: Jianbo Liu <jianbol@nvidia.com> Reviewed-by: Gavi Teitz <gavi@nvidia.com> Reviewed-by: Mark Bloch <mbloch@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.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.