[PATCH nf-next 0/7] flowtable preparation for IPv4 over IPv6 and SIT

[Pablo Neira Ayuso <pablo@netfilter.org>]

Hi Lorenzo,

After reading your v6 series to add IPv4 over IPv6 and SIT support for
the flowtable, and also considering more recent preparation work that
went into net-next, I made this new series to explore easier integration
of your work.

Patch #1 is your update for dev_fill_forward_path() rebased on top
of nf-next.

Then, patches #2 to #7 revisit and consolidate existing infrastructure
to prepare for the IPv4 over IPv6 and SIT support.

From the flowtable datapath, the idea is to parse initially the layer 2
encapsulation and layer 3 tunnel with nf_flow_skb_encap_protocol().
Then, call the IPv4 or IPv6 flowtable lookup+forward function according
to the (inner, if any) IP header. Finally, there is another check
according on the (outer, if any) IP header to call the nf_flow_queue_xmit{4,6}
function according to the ctx->ether_type, which can be updated by the
forward function.

Let me know if I am missing anything, thanks!

Lorenzo Bianconi (1):
  net: pass net_device_path_ctx to dev_fill_forward_path()

Pablo Neira Ayuso (6):
  net: netfilter: add ether_type to net_device_path_ctx and use it
  netfilter: flowtable: rename tun.l3_proto to tun.inner_proto
  netfilter: flowtable: rename ctx.tun.proto to ctx.tun.inner_proto
  netfilter: flowtable: store ethertype in flowtable context
  netfilter: flowtable: move ipv4 and ipv6 xmit path to function
  netfilter: flowtable: detach layer 2 encapsulation parser from lookup

 drivers/net/ethernet/airoha/airoha_ppe.c      |   7 +-
 .../net/ethernet/mediatek/mtk_ppe_offload.c   |   7 +-
 include/linux/netdevice.h                     |   5 +-
 include/net/netfilter/nf_flow_table.h         |   2 +-
 net/core/dev.c                                |  18 +-
 net/ipv4/ipip.c                               |   5 +-
 net/ipv6/ip6_tunnel.c                         |   5 +-
 net/netfilter/nf_flow_table_ip.c              | 167 ++++++++++--------
 net/netfilter/nf_flow_table_path.c            |  17 +-
 9 files changed, 139 insertions(+), 94 deletions(-)

-- 
2.47.3