ip_mroute_getsockopt   19 include/linux/mroute.h int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
ip_mroute_getsockopt 1321 net/ipv4/ip_sockglue.c 		return ip_mroute_getsockopt(sk, optname, optval, optlen);