From: wenxu <wenxu@ucloud.cn>
Date: Mon, 24 Feb 2020 13:22:55 +0800
Subject: netfilter: flowtable: add tunnel encap/decap action offload support
Patch-mainline: v5.7-rc1
Git-commit: 88bf6e4114d5af685c11c02ce95efa7c7494e940
References: bsc#1176447
This patch add tunnel encap decap action offload in the flowtable
offload.
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
net/netfilter/nf_flow_table_offload.c | 45 ++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
--- a/net/netfilter/nf_flow_table_offload.c
+++ b/net/netfilter/nf_flow_table_offload.c
@@ -476,10 +476,52 @@ static void flow_offload_redirect(const
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)
{
+ flow_offload_decap_tunnel(flow, dir, flow_rule);
+ flow_offload_encap_tunnel(flow, dir, flow_rule);
+
if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
return -1;
@@ -506,6 +548,9 @@ int nf_flow_rule_route_ipv6(struct net *
enum flow_offload_tuple_dir dir,
struct nf_flow_rule *flow_rule)
{
+ flow_offload_decap_tunnel(flow, dir, flow_rule);
+ flow_offload_encap_tunnel(flow, dir, flow_rule);
+
if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
return -1;