selftests: forwarding: mirror_lib: Use mausezahn

Using ping in tests is error-prone, because ping is too smart. On a
flaky system (notably in a simulator), when packets don't come quickly
enough, more pings are sent, and that throws off counters. Instead use
mausezahn to generate ICMP echo request packets. That allows us to
send them in quicker succession as well, because the reason the ping
was made slow in the first place was to make the tests work on
simulated systems.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/forwarding/mirror_lib.sh b/tools/testing/selftests/net/forwarding/mirror_lib.sh
index 00797597fcf5f229c4942e671a817d2b92eb5465..c33bfd7ba214290d8c7ab55ea2cbbbc215676d36 100644 (file)
--- a/tools/testing/selftests/net/forwarding/mirror_lib.sh
+++ b/tools/testing/selftests/net/forwarding/mirror_lib.sh
@@ -29,11 +29,9 @@ mirror_test()
        local pref=$1; shift
        local expect=$1; shift
 
-       local ping_timeout=$((PING_TIMEOUT * 5))
        local t0=$(tc_rule_stats_get $dev $pref)
-       ip vrf exec $vrf_name \
-          ${PING} ${sip:+-I $sip} $dip -c 10 -i 0.5 -w $ping_timeout \
-                  &> /dev/null
+       $MZ $vrf_name ${sip:+-A $sip} -B $dip -a own -b bc -q \
+           -c 10 -d 100ms -t icmp type=8
        sleep 0.5
        local t1=$(tc_rule_stats_get $dev $pref)
        local delta=$((t1 - t0))