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

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(-)

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2.47.3