Populate the proto_flow_dissect function for IPv4 and IPv6 packet
offloads. This allows the caller to flow dissect a packet starting
at the given IP protocol (as parsed to that point by flow dissector
for instance).
Signed-off-by: Tom Herbert <t...@quantonium.net>
---
net/ipv4/af_inet.c | 27 +++++++++++++++++++++++++++
net/ipv6/ip6_offload.c | 27 +++++++++++++++++++++++++++
2 files changed, 54 insertions(+)
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index e31108e5ef79..18c1d884999a 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1440,6 +1440,32 @@ static struct sk_buff **ipip_gro_receive(struct sk_buff
**head,
return inet_gro_receive(head, skb);
}
+static enum flow_dissect_ret inet_proto_flow_dissect(struct sk_buff *skb,
+ u8 proto,
+ struct flow_dissector_key_control *key_control,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data,
+ __be16 *p_proto, u8 *p_ip_proto, int *p_nhoff,
+ int *p_hlen, unsigned int flags)
+{
+ enum flow_dissect_ret ret = FLOW_DISSECT_RET_CONTINUE;
+ const struct net_offload *ops;
+
+ rcu_read_lock();
+
+ ops = rcu_dereference(inet_offloads[proto]);
+ if (ops && ops->callbacks.flow_dissect)
+ ret = ops->callbacks.flow_dissect(skb, key_control,
+ flow_dissector,
+ target_container,
+ data, p_proto, p_ip_proto,
+ p_nhoff, p_hlen, flags);
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
#define SECONDS_PER_DAY 86400
/* inet_current_timestamp - Return IP network timestamp
@@ -1763,6 +1789,7 @@ static int ipv4_proc_init(void);
static struct packet_offload ip_packet_offload __read_mostly = {
.type = cpu_to_be16(ETH_P_IP),
+ .proto_flow_dissect = inet_proto_flow_dissect,
.callbacks = {
.gso_segment = inet_gso_segment,
.gro_receive = inet_gro_receive,
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index cdb3728faca7..a33a2b40b3d6 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -339,8 +339,35 @@ static int ip4ip6_gro_complete(struct sk_buff *skb, int
nhoff)
return inet_gro_complete(skb, nhoff);
}
+static enum flow_dissect_ret inet6_proto_flow_dissect(struct sk_buff *skb,
+ u8 proto,
+ struct flow_dissector_key_control *key_control,
+ struct flow_dissector *flow_dissector,
+ void *target_container, void *data,
+ __be16 *p_proto, u8 *p_ip_proto, int *p_nhoff,
+ int *p_hlen, unsigned int flags)
+{
+ enum flow_dissect_ret ret = FLOW_DISSECT_RET_CONTINUE;
+ const struct net_offload *ops;
+
+ rcu_read_lock();
+
+ ops = rcu_dereference(inet6_offloads[proto]);
+ if (ops && ops->callbacks.flow_dissect)
+ ret = ops->callbacks.flow_dissect(skb, key_control,
+ flow_dissector,
+ target_container, data,
+ p_proto, p_ip_proto, p_nhoff,
+ p_hlen, flags);
+
+ rcu_read_unlock();
+
+ return ret;
+}
+
static struct packet_offload ipv6_packet_offload __read_mostly = {
.type = cpu_to_be16(ETH_P_IPV6),
+ .proto_flow_dissect = inet6_proto_flow_dissect,
.callbacks = {
.gso_segment = ipv6_gso_segment,
.gro_receive = ipv6_gro_receive,
--
2.11.0
