Commit d5a49aa6 authored by Jason A. Donenfeld's avatar Jason A. Donenfeld Committed by Jakub Kicinski
Browse files

wireguard: selftests: test multiple parallel streams 



In order to test ndo_start_xmit being called in parallel, explicitly add
separate tests, which should all run on different cores. This should
help tease out bugs associated with queueing up packets from different
cores in parallel. Currently, it hasn't found those types of bugs, but
given future planned work, this is a useful regression to avoid.

Fixes: e7096c13 ("net: WireGuard secure network tunnel")
Signed-off-by: default avatarJason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 7f57bd8d

tools/testing/selftests/wireguard/netns.sh

+14 −1
Original line number Diff line number Diff line
@@ -39,7 +39,7 @@ ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; } 
ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }

ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }

sleep() { read -t "$1" -N 1 || true; }

waitiperf() { pretty "${1//*-}" "wait for iperf:5201 pid $2"; while [[ $(ss -N "$1" -tlpH 'sport = 5201') != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; }

waitiperf() { pretty "${1//*-}" "wait for iperf:${3:-5201} pid $2"; while [[ $(ss -N "$1" -tlpH "sport = ${3:-5201}") != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; }

waitncatudp() { pretty "${1//*-}" "wait for udp:1111 pid $2"; while [[ $(ss -N "$1" -ulpH 'sport = 1111') != *\"ncat\",pid=$2,fd=* ]]; do sleep 0.1; done; }

waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; }
@@ -141,6 +141,19 @@ tests() { 
	n2 iperf3 -s -1 -B fd00::2 &

	waitiperf $netns2 $!

	n1 iperf3 -Z -t 3 -b 0 -u -c fd00::2



	# TCP over IPv4, in parallel

	for max in 4 5 50; do

		local pids=( )

		for ((i=0; i < max; ++i)) do

			n2 iperf3 -p $(( 5200 + i )) -s -1 -B 192.168.241.2 &

			pids+=( $! ); waitiperf $netns2 $! $(( 5200 + i ))

		done

		for ((i=0; i < max; ++i)) do

			n1 iperf3 -Z -t 3 -p $(( 5200 + i )) -c 192.168.241.2 &

		done

		wait "${pids[@]}"

	done

}



[[ $(ip1 link show dev wg0) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}"