ifru_netmask      356 include/linux/compat.h 		struct	sockaddr ifru_netmask;
ifru_netmask      242 include/uapi/linux/if.h 		struct	sockaddr ifru_netmask;
ifru_netmask      261 include/uapi/linux/if.h #define	ifr_netmask	ifr_ifru.ifru_netmask	/* interface net mask	*/