PF_KCM
newsk = sk_alloc(sock_net(osock->sk), PF_KCM, GFP_KERNEL,
.family = PF_KCM,
.family = PF_KCM,
sk = sk_alloc(net, PF_KCM, GFP_KERNEL, &kcm_proto, kern);
.family = PF_KCM,
sock_unregister(PF_KCM);
sock_unregister(PF_KCM);
MODULE_ALIAS_NETPROTO(PF_KCM);
[PF_KCM] = "PF_KCM",
case PF_KCM: