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* fou: make local function staticstephen hemminger2017-05-211-8/+6
| | | | | | | | | | | | The build header functions are not used by any other code. net/ipv6/fou6.c:36:5: warning: no previous prototype for ‘fou6_build_header’ [-Wmissing-prototypes] net/ipv6/fou6.c:54:5: warning: no previous prototype for ‘gue6_build_header’ [-Wmissing-prototypes] Need to do some code rearranging to satisfy different Kconfig possiblities. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* fou: add Kconfig options for IPv6 supportArnd Bergmann2016-05-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A previous patch added the fou6.ko module, but that failed to link in a couple of configurations: net/built-in.o: In function `ip6_tnl_encap_add_fou_ops': net/ipv6/fou6.c:88: undefined reference to `ip6_tnl_encap_add_ops' net/ipv6/fou6.c:94: undefined reference to `ip6_tnl_encap_add_ops' net/ipv6/fou6.c:97: undefined reference to `ip6_tnl_encap_del_ops' net/built-in.o: In function `ip6_tnl_encap_del_fou_ops': net/ipv6/fou6.c:106: undefined reference to `ip6_tnl_encap_del_ops' net/ipv6/fou6.c:107: undefined reference to `ip6_tnl_encap_del_ops' If CONFIG_IPV6=m, ip6_tnl_encap_add_ops/ip6_tnl_encap_del_ops are in a module, but fou6.c can still be built-in, and that obviously fails to link. Also, if CONFIG_IPV6=y, but CONFIG_IPV6_TUNNEL=m or CONFIG_IPV6_TUNNEL=n, the same problem happens for a different reason. This adds two new silent Kconfig symbols to work around both problems: - CONFIG_IPV6_FOU is now always set to 'm' if either CONFIG_NET_FOU=m or CONFIG_IPV6=m - CONFIG_IPV6_FOU_TUNNEL is set implicitly when IPV6_FOU is enabled and NET_FOU_IP_TUNNELS is also turned out, and it will ensure that CONFIG_IPV6_TUNNEL is also available. The options could be made user-visible as well, to give additional room for configuration, but it seems easier not to bother users with more choice here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: aa3463d65e7b ("fou: Add encap ops for IPv6 tunnels") Signed-off-by: David S. Miller <davem@davemloft.net>
* fou: Add encap ops for IPv6 tunnelsTom Herbert2016-05-201-0/+140
This patch add a new fou6 module that provides encapsulation operations for IPv6. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>