__nf_ct_ext_exist
return (ct->ext && __nf_ct_ext_exist(ct->ext, id));
if (!ext || !__nf_ct_ext_exist(ext, id))
if (!ext || !__nf_ct_ext_exist(ext, NF_CT_EXT_LABELS))
if (__nf_ct_ext_exist(old, id))
if (!__nf_ct_ext_exist(ext, id))