Re: [PATCH nf-next v2 4/4] netfilter: nf_flow_table_offload: add tunnel encap/decap action offload support

[wenxu <wenxu@ucloud.cn>]

Hi paul,

encap in this patch.

在 2019/11/21 17:54, wenxu@ucloud.cn 写道:
> From: wenxu <wenxu@ucloud.cn>
>
> This patch add tunnel encap decap action offload in the flowtable
> offload.
>
> Signed-off-by: wenxu <wenxu@ucloud.cn>
> ---
> v2: put encap/decap action before redirect action
>
>  net/netfilter/nf_flow_table_offload.c | 47 +++++++++++++++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
>
> diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
> index 656095c..36a5103 100644
> --- a/net/netfilter/nf_flow_table_offload.c
> +++ b/net/netfilter/nf_flow_table_offload.c
> @@ -469,6 +469,45 @@ static void flow_offload_redirect(const struct flow_offload *flow,
>  	dev_hold(rt->dst.dev);
>  }
>  
> +static void flow_offload_encap_tunnel(const struct flow_offload *flow,
> +				      enum flow_offload_tuple_dir dir,
> +				      struct nf_flow_rule *flow_rule)
> +{
> +	struct flow_action_entry *entry;
> +	struct dst_entry *dst;
> +
> +	dst = flow->tuplehash[dir].tuple.dst_cache;
> +	if (dst->lwtstate) {
> +		struct ip_tunnel_info *tun_info;
> +
> +		tun_info = lwt_tun_info(dst->lwtstate);
> +		if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
> +			entry = flow_action_entry_next(flow_rule);
> +			entry->id = FLOW_ACTION_TUNNEL_ENCAP;
> +			entry->tunnel = tun_info;
> +		}
> +	}
> +}
> +
> +static void flow_offload_decap_tunnel(const struct flow_offload *flow,
> +				      enum flow_offload_tuple_dir dir,
> +				      struct nf_flow_rule *flow_rule)
> +{
> +	struct flow_action_entry *entry;
> +	struct dst_entry *dst;
> +
> +	dst = flow->tuplehash[!dir].tuple.dst_cache;
> +	if (dst->lwtstate) {
> +		struct ip_tunnel_info *tun_info;
> +
> +		tun_info = lwt_tun_info(dst->lwtstate);
> +		if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
> +			entry = flow_action_entry_next(flow_rule);
> +			entry->id = FLOW_ACTION_TUNNEL_DECAP;
> +		}
> +	}
> +}
> +
>  int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
>  			    enum flow_offload_tuple_dir dir,
>  			    struct nf_flow_rule *flow_rule)
> @@ -489,6 +528,10 @@ int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
>  	    flow->flags & FLOW_OFFLOAD_DNAT)
>  		flow_offload_ipv4_checksum(net, flow, flow_rule);
>  
> +	flow_offload_encap_tunnel(flow, dir, flow_rule);
> +
> +	flow_offload_decap_tunnel(flow, dir, flow_rule);
> +
>  	flow_offload_redirect(flow, dir, flow_rule);
>  
>  	return 0;
> @@ -512,6 +555,10 @@ int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
>  		flow_offload_port_dnat(net, flow, dir, flow_rule);
>  	}
>  
> +	flow_offload_encap_tunnel(flow, dir, flow_rule);
> +
> +	flow_offload_decap_tunnel(flow, dir, flow_rule);
> +
>  	flow_offload_redirect(flow, dir, flow_rule);
>  
>  	return 0;