On 2019-10-17 21:41, Honggang LI wrote: > + if (config->print_max_it_iu_size) { > + len += snprintf(target_config_str+len, > + sizeof(target_config_str) - len, > + ",max_it_iu_size=%d", > + be32toh(target->ioc_prof.send_size)); > + > + if (len >= sizeof(target_config_str)) { > + pr_err("Target config string is too long, ignoring target\n"); > + closedir(dir); > + return -1; > + } > + } Hi Honggang, I think this patch will make srp_daemon incompatible with versions of the ib_srp kernel driver that do not support the max_it_iu_size parameter and also that that's unacceptable. How about the following approach: * Do not add a new command-line option. * Add max_it_iu_size at the end. I think that approach will trigger a warning with older versions of the SRP kernel driver but also that it won't break SRP login. Thanks, Bart.