smcr_link_init
rc = smcr_link_init(lgr, lnk, link_idx, ini);
int smcr_link_init(struct smc_link_group *lgr, struct smc_link *lnk,
rc = smcr_link_init(lgr, lnk_new, lnk_idx, ini);
rc = smcr_link_init(lgr, &lgr->lnk[lnk_idx], lnk_idx, ini);