NETCLS_MOUNT_PATH
snprintf(buf, sizeof(buf), "%s%s%d", NETCLS_MOUNT_PATH, \
if (mkdir(NETCLS_MOUNT_PATH, 0777) && errno != EEXIST) {
if (mount("net_cls", NETCLS_MOUNT_PATH, "cgroup", 0, "net_cls")) {
if (rmdir(NETCLS_MOUNT_PATH)) {
join_cgroup_from_top(NETCLS_MOUNT_PATH);