https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 authored by Linus Torvalds on 31 May 2020, 23:49:15 UTC
Linux 5.7
Linux 5.7
Tip revision: 3d77e6a
netdevsim.rst
.. SPDX-License-Identifier: GPL-2.0
=========================
netdevsim devlink support
=========================
This document describes the ``devlink`` features supported by the
``netdevsim`` device driver.
Parameters
==========
.. list-table:: Generic parameters implemented
* - Name
- Mode
* - ``max_macs``
- driverinit
The ``netdevsim`` driver also implements the following driver-specific
parameters.
.. list-table:: Driver-specific parameters implemented
:widths: 5 5 5 85
* - Name
- Type
- Mode
- Description
* - ``test1``
- Boolean
- driverinit
- Test parameter used to show how a driver-specific devlink parameter
can be implemented.
The ``netdevsim`` driver supports reloading via ``DEVLINK_CMD_RELOAD``
Regions
=======
The ``netdevsim`` driver exposes a ``dummy`` region as an example of how the
devlink-region interfaces work. A snapshot is taken whenever the
``take_snapshot`` debugfs file is written to.
Resources
=========
The ``netdevsim`` driver exposes resources to control the number of FIB
entries and FIB rule entries that the driver will allow.
.. code:: shell
$ devlink resource set netdevsim/netdevsim0 path /IPv4/fib size 96
$ devlink resource set netdevsim/netdevsim0 path /IPv4/fib-rules size 16
$ devlink resource set netdevsim/netdevsim0 path /IPv6/fib size 64
$ devlink resource set netdevsim/netdevsim0 path /IPv6/fib-rules size 16
$ devlink dev reload netdevsim/netdevsim0
Driver-specific Traps
=====================
.. list-table:: List of Driver-specific Traps Registered by ``netdevsim``
:widths: 5 5 90
* - Name
- Type
- Description
* - ``fid_miss``
- ``exception``
- When a packet enters the device it is classified to a filtering
indentifier (FID) based on the ingress port and VLAN. This trap is used
to trap packets for which a FID could not be found