kselftests/bpf: use ping6 as the default ipv6 ping binary when it exists

At commit deee2cae27d1 ("kselftests/bpf: use ping6 as the default ipv6 ping
binary if it exists"), it fixed similar issues for shell script, but it
missed a same issue in the C code.

Fixes: 371e4fcc9d96 ("selftests/bpf: cgroup local storage-based network counters")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
CC: Philip Li <philip.li@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/tools/testing/selftests/bpf/test_netcnt.c b/tools/testing/selftests/bpf/test_netcnt.c
index 7887df6933998c62d6d81926066918728d704c8c..44ed7f29f8ab6cec40c83c02c01d28ca36c36492 100644 (file)
--- a/tools/testing/selftests/bpf/test_netcnt.c
+++ b/tools/testing/selftests/bpf/test_netcnt.c
@@ -81,7 +81,10 @@ int main(int argc, char **argv)
                goto err;
        }
 
-       assert(system("ping localhost -6 -c 10000 -f -q > /dev/null") == 0);
+       if (system("which ping6 &>/dev/null") == 0)
+               assert(!system("ping6 localhost -c 10000 -f -q > /dev/null"));
+       else
+               assert(!system("ping -6 localhost -c 10000 -f -q > /dev/null"));
 
        if (bpf_prog_query(cgroup_fd, BPF_CGROUP_INET_EGRESS, 0, NULL, NULL,
                           &prog_cnt)) {