genl_register_cmds
ret = genl_register_cmds(carp_family_id, carp_cmds, nitems(carp_cmds));
bool genl_register_cmds(uint16_t family, const struct genl_cmd *cmds,
genl_register_cmds(family_id, pf_cmds, nitems(pf_cmds));
ret = genl_register_cmds(family_id, pflow_cmds, nitems(pflow_cmds));
rv = genl_register_cmds(rpcnl_family_id, clnt_cmds, nitems(clnt_cmds));
ret = genl_register_cmds(family_id, ktest_cmds, nitems(ktest_cmds));