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Petr Machata says:
====================
mlxsw: Add support for buffer drops mirroring
This set offloads the recently introduced qevent infrastructure in TC and
allows mlxsw to support mirroring of packets that were dropped due to
buffer related reasons (e.g., early drops) during forwarding.
Up until now mlxsw only supported mirroring that was either triggered by
per-port triggers (i.e., via matchall) or by the policy engine (i.e.,
via flower). Packets that are dropped due to buffer related reasons are
mirrored using a third type of trigger, a global trigger.
Global triggers are bound once to a mirroring (SPAN) agent and enabled
on a per-{port, TC} basis. This allows users, for example, to request
that only packets that were early dropped on a specific netdev to be
mirrored.
Patch set overview:
Patch #1 extends flow_block_offload and indirect offload structure to pass
a scheduler instead of a netdevice. That is necessary, because binding type
and netdevice are not a unique identifier of the block anymore.
Patches #2-#3 add the required registers to support above mentioned
functionality.
Patches #4-#6 gradually add support for global mirroring triggers.
Patch #7 adds support for enablement of global mirroring triggers.
Patches #8-#11 are cleanups in the flow offload code and shuffle some
code around to make the qevent offload easier.
Patch #12 implements offload of RED early_drop qevent.
Patch #13 extends the RED selftest for offloaded datapath to cover
early_drop qevent.
v2:
- Patch #1:
- In struct flow_block_indr, track both sch and dev.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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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.