target/linux/generic/backport-5.4/080-wireguard-0119-wireguard-selftests-test-multiple-parallel-streams.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: "Jason A. Donenfeld" <Jason@zx2c4.com>
   3 Date: Mon, 22 Feb 2021 17:25:45 +0100
   4 Subject: [PATCH] wireguard: selftests: test multiple parallel streams
   5
   6 commit d5a49aa6c3e264a93a7d08485d66e346be0969dd upstream.
   7
   8 In order to test ndo_start_xmit being called in parallel, explicitly add
   9 separate tests, which should all run on different cores. This should
  10 help tease out bugs associated with queueing up packets from different
  11 cores in parallel. Currently, it hasn't found those types of bugs, but
  12 given future planned work, this is a useful regression to avoid.
  13
  14 Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
  15 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
  16 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  17 Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
  18 ---
  19  tools/testing/selftests/wireguard/netns.sh | 15 ++++++++++++++-
  20  1 file changed, 14 insertions(+), 1 deletion(-)
  21
  22 --- a/tools/testing/selftests/wireguard/netns.sh
  23 +++ b/tools/testing/selftests/wireguard/netns.sh
  24 @@ -39,7 +39,7 @@ ip0() { pretty 0 "ip $*"; ip -n $netns0
  25  ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }
  26  ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }
  27  sleep() { read -t "$1" -N 1 || true; }
  28 -waitiperf() { pretty "${1//*-}" "wait for iperf:5201 pid $2"; while [[ $(ss -N "$1" -tlpH 'sport = 5201') != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; }
  29 +waitiperf() { pretty "${1//*-}" "wait for iperf:${3:-5201} pid $2"; while [[ $(ss -N "$1" -tlpH "sport = ${3:-5201}") != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; }
  30  waitncatudp() { pretty "${1//*-}" "wait for udp:1111 pid $2"; while [[ $(ss -N "$1" -ulpH 'sport = 1111') != *\"ncat\",pid=$2,fd=* ]]; do sleep 0.1; done; }
  31  waitiface() { pretty "${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;"; }
  32
  33 @@ -141,6 +141,19 @@ tests() {
  34         n2 iperf3 -s -1 -B fd00::2 &
  35         waitiperf $netns2 $!
  36         n1 iperf3 -Z -t 3 -b 0 -u -c fd00::2
  37 +
  38 +       # TCP over IPv4, in parallel
  39 +       for max in 4 5 50; do
  40 +               local pids=( )
  41 +               for ((i=0; i < max; ++i)) do
  42 +                       n2 iperf3 -p $(( 5200 + i )) -s -1 -B 192.168.241.2 &
  43 +                       pids+=( $! ); waitiperf $netns2 $! $(( 5200 + i ))
  44 +               done
  45 +               for ((i=0; i < max; ++i)) do
  46 +                       n1 iperf3 -Z -t 3 -p $(( 5200 + i )) -c 192.168.241.2 &
  47 +               done
  48 +               wait "${pids[@]}"
  49 +       done
  50  }
  51
  52  [[ $(ip1 link show dev wg0) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}"