From: wenxu <we...@ucloud.cn>
With nf_conntrack_bridge function. The bridge family can do
conntrack it self. The flow offload function based on the
conntrack. This patch a bridge family operation in
nf_flow_table_ip.
Signed-off-by: wenxu <we...@ucloud.cn>
---
net/netfilter/nf_flow_table_ip.c | 59 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 57 insertions(+), 2 deletions(-)
diff --git a/net/netfilter/nf_flow_table_ip.c b/net/netfilter/nf_flow_table_ip.c
index 88b4d59..d88dafb 100644
--- a/net/netfilter/nf_flow_table_ip.c
+++ b/net/netfilter/nf_flow_table_ip.c
@@ -233,12 +233,40 @@ static void nf_flow_ipv4_xmit(struct flow_offload *flow,
struct sk_buff *skb,
neigh_xmit(NEIGH_ARP_TABLE, outdev, &nexthop, skb);
}
+static void nf_flow_bridge_xmit(struct flow_offload *flow, struct sk_buff *skb,
+ enum flow_offload_tuple_dir dir)
+{
+ struct net_device *outdev;
+ u16 vlan_tag, vlan_proto;
+
+ vlan_tag = flow->tuplehash[dir].tuple.dst.dst_port.dst_vlan_tag;
+ vlan_proto = flow->tuplehash[dir].tuple.dst.dst_port.vlan_proto;
+ outdev = flow->tuplehash[dir].tuple.dst.dst_port.dev;
+ skb->dev = outdev;
+
+ if (vlan_tag)
+ __vlan_hwaccel_put_tag(skb, htons(vlan_proto), vlan_tag);
+ else
+ __vlan_hwaccel_clear_tag(skb);
+
+ skb_push(skb, ETH_HLEN);
+ if (!is_skb_forwardable(skb->dev, skb))
+ goto drop;
+
+ dev_queue_xmit(skb);
+ return;
+
+drop:
+ kfree_skb(skb);
+}
+
unsigned int
nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct flow_offload_tuple_rhash *tuplehash;
struct nf_flowtable *flow_table = priv;
+ int family = flow_table->type->family;
struct flow_offload_tuple tuple = {};
enum flow_offload_tuple_dir dir;
struct flow_offload *flow;
@@ -247,9 +275,15 @@ static void nf_flow_ipv4_xmit(struct flow_offload *flow,
struct sk_buff *skb,
if (skb->protocol != htons(ETH_P_IP))
return NF_ACCEPT;
+ if (family != NFPROTO_BRIDGE && family != NFPROTO_IPV4)
+ return NF_ACCEPT;
+
if (nf_flow_tuple_ip(skb, state->in, &tuple) < 0)
return NF_ACCEPT;
+ if (family == NFPROTO_BRIDGE && skb_vlan_tag_present(skb))
+ tuple.vlan_tag = skb_vlan_tag_get_id(skb);
+
tuplehash = flow_offload_lookup(flow_table, &tuple);
if (tuplehash == NULL)
return NF_ACCEPT;
@@ -271,7 +305,14 @@ static void nf_flow_ipv4_xmit(struct flow_offload *flow,
struct sk_buff *skb,
return NF_DROP;
flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
- nf_flow_ipv4_xmit(flow, skb, dir);
+ switch (family) {
+ case NFPROTO_IPV4:
+ nf_flow_ipv4_xmit(flow, skb, dir);
+ break;
+ case NFPROTO_BRIDGE:
+ nf_flow_bridge_xmit(flow, skb, dir);
+ break;
+ }
return NF_STOLEN;
}
@@ -463,6 +504,7 @@ static void nf_flow_ipv6_xmit(struct flow_offload *flow,
struct sk_buff *skb,
{
struct flow_offload_tuple_rhash *tuplehash;
struct nf_flowtable *flow_table = priv;
+ int family = flow_table->type->family;
struct flow_offload_tuple tuple = {};
enum flow_offload_tuple_dir dir;
struct flow_offload *flow;
@@ -470,9 +512,15 @@ static void nf_flow_ipv6_xmit(struct flow_offload *flow,
struct sk_buff *skb,
if (skb->protocol != htons(ETH_P_IPV6))
return NF_ACCEPT;
+ if (family != NFPROTO_BRIDGE && family != NFPROTO_IPV6)
+ return NF_ACCEPT;
+
if (nf_flow_tuple_ipv6(skb, state->in, &tuple) < 0)
return NF_ACCEPT;
+ if (family == NFPROTO_BRIDGE && skb_vlan_tag_present(skb))
+ tuple.vlan_tag = skb_vlan_tag_get_id(skb);
+
tuplehash = flow_offload_lookup(flow_table, &tuple);
if (tuplehash == NULL)
return NF_ACCEPT;
@@ -494,7 +542,14 @@ static void nf_flow_ipv6_xmit(struct flow_offload *flow,
struct sk_buff *skb,
return NF_DROP;
flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
- nf_flow_ipv6_xmit(flow, skb, dir);
+ switch (family) {
+ case NFPROTO_IPV6:
+ nf_flow_ipv6_xmit(flow, skb, dir);
+ break;
+ case NFPROTO_BRIDGE:
+ nf_flow_bridge_xmit(flow, skb, dir);
+ break;
+ }
return NF_STOLEN;
}
--
1.8.3.1
