nvmf_strpad
nvmf_strpad(cdata->mn, utsname.sysname, sizeof(cdata->mn));
nvmf_strpad(cdata->fr, utsname.release, sizeof(cdata->fr));
nvmf_strpad(cdata->sn, serial, sizeof(cdata->sn));
nvmf_strpad(cdata->mn, model, sizeof(cdata->mn));
nvmf_strpad(cdata->fr, firmware_version, sizeof(cdata->fr));
void nvmf_strpad(char *dst, const char *src, size_t len);