taglinefilesource code
user_mss830net/inet/sock.csk->user_mss = 0;
user_mss110net/inet/sock.hvolatile unsigned short  user_mss;  /* mss requested by user in ioctl */
user_mss1803net/inet/tcp.cif (sk->user_mss)
user_mss1804net/inet/tcp.cnewsk->mtu = sk->user_mss;
user_mss2946net/inet/tcp.cif (sk->user_mss)
user_mss2947net/inet/tcp.csk->mtu = sk->user_mss;
user_mss3565net/inet/tcp.csk->user_mss=val;
user_mss3585net/inet/tcp.cval=sk->user_mss;