smc_clcsock_replace_cb
smc_clcsock_replace_cb(&smc->clcsock->sk->sk_data_ready,
smc_clcsock_replace_cb(&clcsk->sk_state_change, smc_fback_state_change,
smc_clcsock_replace_cb(&clcsk->sk_data_ready, smc_fback_data_ready,
smc_clcsock_replace_cb(&clcsk->sk_write_space, smc_fback_write_space,
smc_clcsock_replace_cb(&clcsk->sk_error_report, smc_fback_error_report,