tn_ctime
dir->tn_ctime = now;
gethrestime(&tp->tn_ctime);
gethrestime(&tp->tn_ctime);
gethrestime(&tp->tn_ctime);
dir->tn_ctime = now;
tp->tn_ctime = now;
dir->tn_ctime = now;
parent->tn_ctime = now;
dir->tn_ctime = now;
toparent->tn_ctime = now;
to->tn_ctime = now;
gethrestime(&toparent->tn_ctime);
gethrestime(&fromparent->tn_ctime);
t->tn_ctime = now;
tp->tn_ctime = now;
tp->tn_ctime = now;
vap->va_ctime = tp->tn_ctime;
gethrestime(&tp->tn_ctime);