taglinefilesource code
TCP_CLOSING774net/ipv4/af_inet.ccase TCP_CLOSING:
TCP_CLOSING711net/ipv4/tcp.cif (sk->state == TCP_FIN_WAIT1 || sk->state == TCP_FIN_WAIT2 || sk->state == TCP_CLOSING ) 
TCP_CLOSING2281net/ipv4/tcp.ccase TCP_CLOSING:
TCP_CLOSING2438net/ipv4/tcp.csk->state == TCP_CLOSING ||
TCP_CLOSING3626net/ipv4/tcp.cif (sk->state == TCP_CLOSING) 
TCP_CLOSING3744net/ipv4/tcp.ccase TCP_CLOSING:
TCP_CLOSING3772net/ipv4/tcp.ctcp_set_state(sk,TCP_CLOSING);
TCP_CLOSING4937net/ipv4/tcp.csk->state != TCP_CLOSING