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b515dc5479
Reuse the flowi6 template t->fl.u.ip6 built by ip6_tnl_link_config() in ip6_tnl_fill_forward_path(), aligning the fast-path route lookup with the slow path in ipxip6_tnl_xmit(). This automatically inherits the correct conditional FLOWLABEL masking based on the IP6_TNL_F_USE_ORIG_FLOWLABEL flag. Return -EOPNOTSUPP when IP6_TNL_F_USE_ORIG_TCLASS, IP6_TNL_F_USE_ORIG_FLOWLABEL or IP6_TNL_F_USE_ORIG_FWMARK is set, or for collect_md tunnels, since fill_forward_path has no access to the original skb and cannot recover the per-packet traffic class, flowlabel, mark or tunnel destination needed for the route lookup. Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Link: https://patch.msgid.link/20260724-ip6ip6-route-lookup-fill_forward_path-v3-1-7b7991538614@kernel.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>