SIMP_MAX_DATA
d->tcfd_defdata = kzalloc(SIMP_MAX_DATA, GFP_KERNEL);
nla_strscpy(d->tcfd_defdata, defdata, SIMP_MAX_DATA);
nla_strscpy(d->tcfd_defdata, defdata, SIMP_MAX_DATA);
[TCA_DEF_DATA] = { .type = NLA_STRING, .len = SIMP_MAX_DATA },