tcp_getsockopt    377 include/net/tcp.h extern int			tcp_getsockopt(struct sock *sk, int level, 
tcp_getsockopt   2365 net/ipv4/tcp_ipv4.c 	.getsockopt		= tcp_getsockopt,
tcp_getsockopt   2032 net/ipv6/tcp_ipv6.c 	.getsockopt		= tcp_getsockopt,