netdevsim devlink support

This document describes the devlink features supported by the netdevsim device driver.

Parameters

Generic parameters implemented

Name	Mode
max_macs	driverinit

The netdevsim driver also implements the following driver-specific parameters.

Driver-specific parameters implemented

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.

$ 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 of Driver-specific Traps Registered by netdevsim

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