netdevsim devlink support¶
This document describes the devlink
features supported by the
netdevsim
device driver.
Parameters¶
Name |
Mode |
|
driverinit |
The netdevsim
driver also implements the following driver-specific
parameters.
Name |
Type |
Mode |
Description |
|
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, FIB rule entries and nexthops 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 resource set netdevsim/netdevsim0 path /nexthops size 16
$ devlink dev reload netdevsim/netdevsim0
Rate objects¶
The netdevsim
driver supports rate objects management, which includes:
registerging/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
:
$ 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.:
$ ls /sys/kernel/debug/netdevsim/netdevsim0/ports/1
dev ethtool rate_parent tx_max tx_share
Driver-specific Traps¶
Name |
Type |
Description |
|
|
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 |