1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3 4readonly FLUSH_PATH="/sys/class/net/${dev}/gro_flush_timeout" 5readonly IRQ_PATH="/sys/class/net/${dev}/napi_defer_hard_irqs" 6readonly FLUSH_TIMEOUT="$(< ${FLUSH_PATH})" 7readonly HARD_IRQS="$(< ${IRQ_PATH})" 8readonly server_ns=$(mktemp -u server-XXXXXXXX) 9readonly client_ns=$(mktemp -u client-XXXXXXXX) 10 11netdev_check_for_carrier() { 12 local -r dev="$1" 13 14 for i in {1..5}; do 15 carrier="$(cat /sys/class/net/${dev}/carrier)" 16 if [[ "${carrier}" -ne 1 ]] ; then 17 echo "carrier not ready yet..." >&2 18 sleep 1 19 else 20 echo "carrier ready" >&2 21 break 22 fi 23 done 24 echo "${carrier}" 25} 26 27# Assumes that there is no existing ipvlan device on the physical device 28setup_loopback_environment() { 29 local dev="$1" 30 31 # Fail hard if cannot turn on loopback mode for current NIC 32 ethtool -K "${dev}" loopback on || exit 1 33 sleep 1 34 35 # Check for the carrier 36 carrier=$(netdev_check_for_carrier ${dev}) 37 if [[ "${carrier}" -ne 1 ]] ; then 38 echo "setup_loopback_environment failed" 39 exit 1 40 fi 41} 42 43setup_macvlan_ns(){ 44 local -r link_dev="$1" 45 local -r ns_name="$2" 46 local -r ns_dev="$3" 47 local -r ns_mac="$4" 48 local -r addr="$5" 49 50 ip link add link "${link_dev}" dev "${ns_dev}" \ 51 address "${ns_mac}" type macvlan 52 exit_code=$? 53 if [[ "${exit_code}" -ne 0 ]]; then 54 echo "setup_macvlan_ns failed" 55 exit $exit_code 56 fi 57 58 [[ -e /var/run/netns/"${ns_name}" ]] || ip netns add "${ns_name}" 59 ip link set dev "${ns_dev}" netns "${ns_name}" 60 ip -netns "${ns_name}" link set dev "${ns_dev}" up 61 if [[ -n "${addr}" ]]; then 62 ip -netns "${ns_name}" addr add dev "${ns_dev}" "${addr}" 63 fi 64 65 sleep 1 66} 67 68cleanup_macvlan_ns(){ 69 while (( $# >= 2 )); do 70 ns_name="$1" 71 ns_dev="$2" 72 ip -netns "${ns_name}" link del dev "${ns_dev}" 73 ip netns del "${ns_name}" 74 shift 2 75 done 76} 77 78cleanup_loopback(){ 79 local -r dev="$1" 80 81 ethtool -K "${dev}" loopback off 82 sleep 1 83 84 # Check for the carrier 85 carrier=$(netdev_check_for_carrier ${dev}) 86 if [[ "${carrier}" -ne 1 ]] ; then 87 echo "setup_loopback_environment failed" 88 exit 1 89 fi 90} 91 92setup_interrupt() { 93 # Use timer on host to trigger the network stack 94 # Also disable device interrupt to not depend on NIC interrupt 95 # Reduce test flakiness caused by unexpected interrupts 96 echo 100000 >"${FLUSH_PATH}" 97 echo 50 >"${IRQ_PATH}" 98} 99 100setup_ns() { 101 # Set up server_ns namespace and client_ns namespace 102 setup_macvlan_ns "${dev}" ${server_ns} server "${SERVER_MAC}" 103 setup_macvlan_ns "${dev}" ${client_ns} client "${CLIENT_MAC}" 104} 105 106cleanup_ns() { 107 cleanup_macvlan_ns ${server_ns} server ${client_ns} client 108} 109 110setup() { 111 setup_loopback_environment "${dev}" 112 setup_interrupt 113} 114 115cleanup() { 116 cleanup_loopback "${dev}" 117 118 echo "${FLUSH_TIMEOUT}" >"${FLUSH_PATH}" 119 echo "${HARD_IRQS}" >"${IRQ_PATH}" 120} 121