selftests: net: udpgro_fwd.sh: explicitly checking the available ping feature

As Paolo pointed out, the result of ping IPv6 address depends on
the running distro. So explicitly checking the available ping feature,
as e.g. do the bareudp.sh self-tests.

Fixes: c2c71745455b ("selftests: net: using ping6 for IPv6 in udpgro_fwd.sh")
Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn>
Link: https://lore.kernel.org/r/825ee22b-4245-dbf7-d2f7-a230770d6e21@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/udpgro_fwd.sh b/tools/testing/selftests/net/udpgro_fwd.sh
index 3ea73013d9568cc8417faa41d003be1c229f02c8..6f05e06f67613d2bbabb8233581c9afec1551b58 100755 (executable)
--- a/tools/testing/selftests/net/udpgro_fwd.sh
+++ b/tools/testing/selftests/net/udpgro_fwd.sh
@@ -193,7 +193,8 @@ for family in 4 6; do
                SUFFIX="64 nodad"
                VXDEV=vxlan6
                IPT=ip6tables
-               PING="ping6"
+               # Use ping6 on systems where ping doesn't handle IPv6
+               ping -w 1 -c 1 ::1 > /dev/null 2>&1 || PING="ping6"
        fi
 
        echo "IPv$family"