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netfilter: flowtable: add tunnel encap/decap action offload support

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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>
This commit is contained in:
wenxu 2020-02-24 13:22:55 +08:00 committed by Pablo Neira Ayuso
parent cfab6dbd0e
commit 88bf6e4114
1 changed files with 45 additions and 0 deletions
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45
net/netfilter/nf_flow_table_offload.c
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@ -475,10 +475,52 @@ 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)
{
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;
@ -505,6 +547,9 @@ int nf_flow_rule_route_ipv6(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;