This patchset fixes a few bugs in gre metadata mode implementation, mainly with ipgre.
As an example, in this setup: ip a a 192.168.1.1/24 dev eth0 ip l a gre1 type gre external ip l s gre1 up ip a a 192.168.99.1/24 dev gre1 ip r a 192.168.99.2/32 encap ip dst 192.168.1.2 ttl 10 dev gre1 ping 192.168.99.2 the traffic does not go through before this patchset and does as expected with it applied. v2: Rejecting invalid configuration, added patch 3, dropped patch for ETH_P_TEB (will target net-next). Jiri Benc (3): gre: do not assign header_ops in collect metadata mode gre: build header correctly for collect metadata tunnels gre: allow creation of gretap interfaces in metadata mode net/ipv4/ip_gre.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) -- 1.8.3.1