On Sat, Dec 29, 2018 at 06:10:25PM +0800, we...@ucloud.cn wrote:
> From: wenxu <we...@ucloud.cn>
>
> In the forward chain the iif is changed from slave device to master vrf
> device. It will lead the offload not match on lower slave device.
>
> This patch make the flollowing example can work correct
>
> ip addr add dev eth0 1.1.1.1/24
> ip addr add dev eth1 10.0.0.1/24
> ip link add user1 type vrf table 1
> ip l set user1 up
> ip l set dev eth0 master user1
> ip l set dev eth1 master user1
>
> nft add table firewall
> nft add flowtable f fb1 { hook ingress priority 0 \; devices = { eth0, eth1 }
> \; }
> nft add chain f ftb-all {type filter hook forward priority 0 \; policy accept
> \; }
> nft add rule f ftb-all ct zone 1 ip protocol tcp flow offload @fb1
> nft add rule f ftb-all ct zone 1 ip protocol udp flow offload @fb1
>
> Signed-off-by: wenxu <we...@ucloud.cn>
> ---
> net/netfilter/nft_flow_offload.c | 12 +++++++++++-
> 1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/net/netfilter/nft_flow_offload.c
> b/net/netfilter/nft_flow_offload.c
> index 974525e..a5995c0 100644
> --- a/net/netfilter/nft_flow_offload.c
> +++ b/net/netfilter/nft_flow_offload.c
> @@ -30,9 +30,11 @@ static int nft_flow_route(const struct nft_pktinfo *pkt,
> switch (nft_pf(pkt)) {
> case NFPROTO_IPV4:
> fl.u.ip4.daddr = ct->tuplehash[!dir].tuple.dst.u3.ip;
> + fl.u.ip4.flowi4_oif = nft_in(pkt)->ifindex;
> break;
> case NFPROTO_IPV6:
> fl.u.ip6.daddr = ct->tuplehash[!dir].tuple.dst.u3.in6;
> + fl.u.ip6.flowi6_oif = nft_in(pkt)->ifindex;
> break;
> }
>
> @@ -41,7 +43,15 @@ static int nft_flow_route(const struct nft_pktinfo *pkt,
> return -ENOENT;
>
> route->tuple[dir].dst = this_dst;
> - route->tuple[dir].ifindex = nft_in(pkt)->ifindex;
> + if (netif_is_l3_master(nft_in(pkt))) {
> + if (other_dst->dev)
> + route->tuple[dir].ifindex = other_dst->dev->ifindex;
> + else
> + route->tuple[dir].ifindex = nft_in(pkt)->ifindex;
> + } else {
> + route->tuple[dir].ifindex = nft_in(pkt)->ifindex;
> + }
Could we just use the the ifindex that we pass via
route->tuple[dir].dst from flow_offload_fill_dir()?
We could just remove this route->tuple[dir].ifindex field.
> +
> route->tuple[!dir].dst = other_dst;
> route->tuple[!dir].ifindex = nft_out(pkt)->ifindex;
>
> --
> 1.8.3.1
>
