BTPROTO_L2CAP
case BTPROTO_L2CAP:
sk = l2cap_sock_alloc(sock_net(parent), NULL, BTPROTO_L2CAP,
bt_sock_reclassify_lock(sk, BTPROTO_L2CAP);
err = bt_sock_register(BTPROTO_L2CAP, &l2cap_sock_family_ops);
bt_sock_unregister(BTPROTO_L2CAP);
bt_sock_unregister(BTPROTO_L2CAP);
err = sock_create_kern(&init_net, PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP, sock);