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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
readonly FLUSH_PATH="/sys/class/net/${dev}/gro_flush_timeout"
readonly IRQ_PATH="/sys/class/net/${dev}/napi_defer_hard_irqs"
readonly FLUSH_TIMEOUT="$(< ${FLUSH_PATH})"
readonly HARD_IRQS="$(< ${IRQ_PATH})"
netdev_check_for_carrier() {
local -r dev="$1"
for i in {1..5}; do
carrier="$(cat /sys/class/net/${dev}/carrier)"
if [[ "${carrier}" -ne 1 ]] ; then
echo "carrier not ready yet..." >&2
sleep 1
else
echo "carrier ready" >&2
break
fi
done
echo "${carrier}"
}
# Assumes that there is no existing ipvlan device on the physical device
setup_loopback_environment() {
local dev="$1"
# Fail hard if cannot turn on loopback mode for current NIC
ethtool -K "${dev}" loopback on || exit 1
sleep 1
# Check for the carrier
carrier=$(netdev_check_for_carrier ${dev})
if [[ "${carrier}" -ne 1 ]] ; then
echo "setup_loopback_environment failed"
exit 1
fi
}
setup_macvlan_ns(){
local -r link_dev="$1"
local -r ns_name="$2"
local -r ns_dev="$3"
local -r ns_mac="$4"
local -r addr="$5"
ip link add link "${link_dev}" dev "${ns_dev}" \
address "${ns_mac}" type macvlan
exit_code=$?
if [[ "${exit_code}" -ne 0 ]]; then
echo "setup_macvlan_ns failed"
exit $exit_code
fi
[[ -e /var/run/netns/"${ns_name}" ]] || ip netns add "${ns_name}"
ip link set dev "${ns_dev}" netns "${ns_name}"
ip -netns "${ns_name}" link set dev "${ns_dev}" up
if [[ -n "${addr}" ]]; then
ip -netns "${ns_name}" addr add dev "${ns_dev}" "${addr}"
fi
sleep 1
}
cleanup_macvlan_ns(){
while (( $# >= 2 )); do
ns_name="$1"
ns_dev="$2"
ip -netns "${ns_name}" link del dev "${ns_dev}"
ip netns del "${ns_name}"
shift 2
done
}
cleanup_loopback(){
local -r dev="$1"
ethtool -K "${dev}" loopback off
sleep 1
# Check for the carrier
carrier=$(netdev_check_for_carrier ${dev})
if [[ "${carrier}" -ne 1 ]] ; then
echo "setup_loopback_environment failed"
exit 1
fi
}
setup_interrupt() {
# Use timer on host to trigger the network stack
# Also disable device interrupt to not depend on NIC interrupt
# Reduce test flakiness caused by unexpected interrupts
echo 100000 >"${FLUSH_PATH}"
echo 50 >"${IRQ_PATH}"
}
setup_ns() {
# Set up server_ns namespace and client_ns namespace
setup_macvlan_ns "${dev}" server_ns server "${SERVER_MAC}"
setup_macvlan_ns "${dev}" client_ns client "${CLIENT_MAC}"
}
cleanup_ns() {
cleanup_macvlan_ns server_ns server client_ns client
}
setup() {
setup_loopback_environment "${dev}"
setup_interrupt
}
cleanup() {
cleanup_loopback "${dev}"
echo "${FLUSH_TIMEOUT}" >"${FLUSH_PATH}"
echo "${HARD_IRQS}" >"${IRQ_PATH}"
}
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