taglinefilesource code
user_mss873net/inet/sock.csk->user_mss = 0;
user_mss107net/inet/sock.hvolatile unsigned short  user_mss;  /* mss requested by user in ioctl */
user_mss1950net/inet/tcp.cif (sk->user_mss)
user_mss1951net/inet/tcp.cnewsk->mtu = sk->user_mss;
user_mss3106net/inet/tcp.cif (sk->user_mss)
user_mss3107net/inet/tcp.csk->mtu = sk->user_mss;
user_mss3834net/inet/tcp.csk->user_mss=val;
user_mss3854net/inet/tcp.cval=sk->user_mss;