taglinefilesource code
user_mss643net/inet/af_inet.csk->user_mss = 0;
user_mss117net/inet/sock.hvolatile unsigned short  user_mss;  /* mss requested by user in ioctl */
user_mss2820net/inet/tcp.cif (sk->user_mss)
user_mss2821net/inet/tcp.cnewsk->mtu = sk->user_mss;
user_mss4350net/inet/tcp.cif (sk->user_mss)
user_mss4351net/inet/tcp.csk->mtu = sk->user_mss;
user_mss5018net/inet/tcp.csk->user_mss=val;
user_mss5038net/inet/tcp.cval=sk->user_mss;