Re: [PATCH net-next 01/14] net: ipv4: Add a flags argument to iptunnel_xmit(), udp_tunnel_xmit_skb()

iptunnel_xmit() erases the contents of the SKB control block. In order to be able to set particular IPCB flags on the SKB, add a corresponding parameter, and propagate it to udp_tunnel_xmit_skb() as well. In one of the following patches, VXLAN driver will use this facility to mark packets as subject to IP multicast routing. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Ido Schimmel <idosch(a)nvidia.com> --- Notes: CC: Pablo Neira Ayuso <pablo(a)netfilter.org> CC: osmocom-net-gprs(a)lists.osmocom.org CC: Andrew Lunn <andrew+netdev(a)lunn.ch> CC: Taehee Yoo <ap420073(a)gmail.com> CC: Antonio Quartulli <antonio(a)openvpn.net> CC: "Jason A. Donenfeld" <Jason(a)zx2c4.com> CC: wireguard(a)lists.zx2c4.com CC: Marcelo Ricardo Leitner <marcelo.leitner(a)gmail.com> CC: linux-sctp(a)vger.kernel.org CC: Jon Maloy <jmaloy(a)redhat.com> CC: tipc-discussion(a)lists.sourceforge.net