selftests: net: use slowwait to make sure IPv6 setup finished

Sometimes the vxlan vnifiltering test failed on slow machines due to
network setup not finished. e.g.

  TEST: VM connectivity over vnifiltering vxlan (ipv4 default rdst)   [ OK ]
  TEST: VM connectivity over vnifiltering vxlan (ipv6 default rdst)   [FAIL]

Let's use slowwait to make sure the connection is finished.

Signed-off-by: Hangbin Liu <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: NipaLocal <nipa@local>

Author: liuhangbin

tools/testing/selftests/net/test_vxlan_vnifiltering.sh

@@ -146,18 +146,17 @@ run_cmd()
 }
 
 check_hv_connectivity() {
-	ip netns exec $hv_1 ping -c 1 -W 1 $1 &>/dev/null
-	sleep 1
-	ip netns exec $hv_1 ping -c 1 -W 1 $2 &>/dev/null
+	slowwait 5 ip netns exec $hv_1 ping -c 1 -W 1 $1 &>/dev/null
+	slowwait 5 ip netns exec $hv_1 ping -c 1 -W 1 $2 &>/dev/null
 
 	return $?
 }
 
 check_vm_connectivity() {
-	run_cmd "ip netns exec $vm_11 ping -c 1 -W 1 10.0.10.12"
+	slowwait 5 run_cmd "ip netns exec $vm_11 ping -c 1 -W 1 10.0.10.12"
 	log_test $? 0 "VM connectivity over $1 (ipv4 default rdst)"
 
-	run_cmd "ip netns exec $vm_21 ping -c 1 -W 1 10.0.10.22"
+	slowwait 5 run_cmd "ip netns exec $vm_21 ping -c 1 -W 1 10.0.10.22"
 	log_test $? 0 "VM connectivity over $1 (ipv6 default rdst)"
 }