[PATCH nf-next v3 0/4] netfilter: nf_flow_table_offload: support tunnel offload

[wenxu@ucloud.cn]

From: wenxu <wenxu@ucloud.cn>

This patch provide tunnel offload based on route lwtunnel. 
The first two patches support indr callback setup
Then add tunnel match and action offload

Test with mlx driver as following:

ip link add user1 type vrf table 1
ip l set user1 up 
ip l set dev mlx_pf0vf0 down
ip l set dev mlx_pf0vf0 master user1
ifconfig mlx_pf0vf0 10.0.0.1/24 up

ifconfig mlx_p0 172.168.152.75/24 up

ip l add dev tun1 type gretap key 1000
ip l set dev tun1 master user1
ifconfig tun1 10.0.1.1/24 up

ip r r 10.0.1.241 encap ip id 1000 dst 172.168.152.241 key dev tun1 table 1

nft add table firewall
nft add chain firewall zones { type filter hook prerouting priority - 300 \; }
nft add rule firewall zones counter ct zone set iif map { "tun1" : 1, "mlx_pf0vf0" : 1 }
nft add chain firewall rule-1000-ingress
nft add rule firewall rule-1000-ingress ct zone 1 ct state established,related counter accept
nft add rule firewall rule-1000-ingress ct zone 1 ct state invalid counter drop
nft add rule firewall rule-1000-ingress ct zone 1 tcp dport 5001 ct state new counter accept
nft add rule firewall rule-1000-ingress ct zone 1 udp dport 5001 ct state new counter accept
nft add rule firewall rule-1000-ingress ct zone 1 tcp dport 22 ct state new counter accept
nft add rule firewall rule-1000-ingress ct zone 1 ip protocol icmp ct state new counter accept
nft add rule firewall rule-1000-ingress counter drop
nft add chain firewall rules-all { type filter hook prerouting priority - 150 \; }
nft add rule firewall rules-all meta iifkind "vrf" counter accept
nft add rule firewall rules-all iif vmap { "tun1" : jump rule-1000-ingress }

nft add flowtable firewall fb1 { hook ingress priority 2 \; devices = { tun1, mlx_pf0vf0 } \; }
nft add chain firewall ftb-all {type filter hook forward priority 0 \; policy accept \; }
nft add rule firewall ftb-all ct zone 1 ip protocol tcp flow offload @fb1
nft add rule firewall ftb-all ct zone 1 ip protocol udp flow offload @fb1

This version rebase on the following upstream fixes:

netfilter: nf_flow_table_offload: Fix block setup as TC_SETUP_FT cmd
netfilter: nf_flow_table_offload: Fix block_cb tc_setup_type as TC_SETUP_CLSFLOWER
netfilter: nf_flow_table_offload: Don't use offset uninitialized in flow_offload_port_{d,s}nat
netfilter: nf_flow_table_offload: add IPv6 match description
netfilter: nf_flow_table_offload: Correct memcpy size for flow_overload_mangle()


wenxu (4):
  netfilter: nf_flow_table_offload: refactor nf_flow_table_offload_setup
    to support indir setup
  netfilter: nf_flow_table_offload: add indr block setup support
  netfilter: nf_flow_table_offload: add tunnel match offload support
  netfilter: nf_flow_table_offload: add tunnel encap/decap action
    offload support

 net/netfilter/nf_flow_table_offload.c | 253 +++++++++++++++++++++++++++++++---
 1 file changed, 236 insertions(+), 17 deletions(-)

-- 
1.8.3.1