linux/tools/testing/selftests/net/setup_veth.sh
Paolo Abeni 9af771d2ec selftests/net: allow GRO coalesce test on veth
This change extends the existing GRO coalesce test to
allow running on top of a veth pair, so that no H/W dep
is required to run them.

By default gro.sh will use the veth backend, and will try
to use exiting H/W in loopback mode if a specific device
name is provided with the '-i' command line option.

No functional change is intended for the loopback-based
tests, just move all the relevant initialization/cleanup
code into the related script.

Introduces a new initialization helper script for the
veth backend, and plugs the correct helper script according
to the provided command line.

Additionally, enable veth-based tests by default.

v1 -> v2:
  - drop unused code in setup_veth_ns() - Willem

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-08-26 12:03:49 +01:00

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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
setup_veth_ns() {
local -r link_dev="$1"
local -r ns_name="$2"
local -r ns_dev="$3"
local -r ns_mac="$4"
[[ -e /var/run/netns/"${ns_name}" ]] || ip netns add "${ns_name}"
echo 100000 > "/sys/class/net/${ns_dev}/gro_flush_timeout"
ip link set dev "${ns_dev}" netns "${ns_name}" mtu 65535
ip -netns "${ns_name}" link set dev "${ns_dev}" up
ip netns exec "${ns_name}" ethtool -K "${ns_dev}" gro on tso off
}
setup_ns() {
# Set up server_ns namespace and client_ns namespace
ip link add name server type veth peer name client
setup_veth_ns "${dev}" server_ns server "${SERVER_MAC}"
setup_veth_ns "${dev}" client_ns client "${CLIENT_MAC}"
}
cleanup_ns() {
local ns_name
for ns_name in client_ns server_ns; do
[[ -e /var/run/netns/"${ns_name}" ]] && ip netns del "${ns_name}"
done
}
setup() {
# no global init setup step needed
:
}
cleanup() {
cleanup_ns
}