[PATCH net] selftests: forwarding: Fix ping failure due to short timeout

[Ido Schimmel <idosch@nvidia.com>]

The tests send 100 pings in 0.1 second intervals and force a timeout of
11 seconds, which is borderline (especially on debug kernels), resulting
in random failures in netdev CI [1].

Fix by increasing the timeout to 20 seconds. It should not prolong the
test unless something is wrong, in which case the test will rightfully
fail.

[1]
 # selftests: net/forwarding: vxlan_bridge_1d_port_8472_ipv6.sh
 # INFO: Running tests with UDP port 8472
 # TEST: ping: local->local                                            [ OK ]
 # TEST: ping: local->remote 1                                         [FAIL]
 # Ping failed
 [...]

Fixes: b07e9957f220 ("selftests: forwarding: Add VxLAN tests with a VLAN-unaware bridge for IPv6")
Fixes: 728b35259e28 ("selftests: forwarding: Add VxLAN tests with a VLAN-aware bridge for IPv6")
Reported-by: Paolo Abeni <pabeni@redhat.com>
Closes: https://lore.kernel.org/netdev/24a7051fdcd1f156c3704bca39e4b3c41dfc7c4b.camel@redhat.com/
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 .../testing/selftests/net/forwarding/vxlan_bridge_1d_ipv6.sh  | 4 ++--
 .../testing/selftests/net/forwarding/vxlan_bridge_1q_ipv6.sh  | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/vxlan_bridge_1d_ipv6.sh b/tools/testing/selftests/net/forwarding/vxlan_bridge_1d_ipv6.sh
index a0bb4524e1e9..a603f7b0a08f 100755
--- a/tools/testing/selftests/net/forwarding/vxlan_bridge_1d_ipv6.sh
+++ b/tools/testing/selftests/net/forwarding/vxlan_bridge_1d_ipv6.sh
@@ -354,7 +354,7 @@ __ping_ipv4()
 
 	# Send 100 packets and verify that at least 100 packets hit the rule,
 	# to overcome ARP noise.
-	PING_COUNT=100 PING_TIMEOUT=11 ping_do $dev $dst_ip
+	PING_COUNT=100 PING_TIMEOUT=20 ping_do $dev $dst_ip
 	check_err $? "Ping failed"
 
 	tc_check_at_least_x_packets "dev $rp1 egress" 101 10 100
@@ -410,7 +410,7 @@ __ping_ipv6()
 
 	# Send 100 packets and verify that at least 100 packets hit the rule,
 	# to overcome neighbor discovery noise.
-	PING_COUNT=100 PING_TIMEOUT=11 ping6_do $dev $dst_ip
+	PING_COUNT=100 PING_TIMEOUT=20 ping6_do $dev $dst_ip
 	check_err $? "Ping failed"
 
 	tc_check_at_least_x_packets "dev $rp1 egress" 101 100
diff --git a/tools/testing/selftests/net/forwarding/vxlan_bridge_1q_ipv6.sh b/tools/testing/selftests/net/forwarding/vxlan_bridge_1q_ipv6.sh
index d880df89bc8b..e83fde79f40d 100755
--- a/tools/testing/selftests/net/forwarding/vxlan_bridge_1q_ipv6.sh
+++ b/tools/testing/selftests/net/forwarding/vxlan_bridge_1q_ipv6.sh
@@ -457,7 +457,7 @@ __ping_ipv4()
 
 	# Send 100 packets and verify that at least 100 packets hit the rule,
 	# to overcome ARP noise.
-	PING_COUNT=100 PING_TIMEOUT=11 ping_do $dev $dst_ip
+	PING_COUNT=100 PING_TIMEOUT=20 ping_do $dev $dst_ip
 	check_err $? "Ping failed"
 
 	tc_check_at_least_x_packets "dev $rp1 egress" 101 10 100
@@ -522,7 +522,7 @@ __ping_ipv6()
 
 	# Send 100 packets and verify that at least 100 packets hit the rule,
 	# to overcome neighbor discovery noise.
-	PING_COUNT=100 PING_TIMEOUT=11 ping6_do $dev $dst_ip
+	PING_COUNT=100 PING_TIMEOUT=20 ping6_do $dev $dst_ip
 	check_err $? "Ping failed"
 
 	tc_check_at_least_x_packets "dev $rp1 egress" 101 100
-- 
2.43.0