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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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=========================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-specificparameters.
.. 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 thedevlink-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 FIBentries, FIB rule entries and nexthops 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 resource set netdevsim/netdevsim0 path /nexthops size 16 $ devlink dev reload netdevsim/netdevsim0
Rate objects============
The ``netdevsim`` driver supports rate objects management, which includes:
- registering/unregistering leaf rate objects per VF devlink port;- creation/deletion node rate objects;- setting tx_share and tx_max rate values for any rate object type;- setting parent node for any rate object type.
Rate nodes and their parameters are exposed in ``netdevsim`` debugfs in RO mode.For example created rate node with name ``some_group``:
.. code:: shell
$ ls /sys/kernel/debug/netdevsim/netdevsim0/rate_groups/some_group rate_parent tx_max tx_share
Same parameters are exposed for leaf objects in corresponding ports directories.For ex.:
.. code:: shell
$ ls /sys/kernel/debug/netdevsim/netdevsim0/ports/1 dev ethtool rate_parent tx_max tx_share
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 identifier (FID) based on the ingress port and VLAN. This trap is used to trap packets for which a FID could not be found