flow_dissect: use programable dissector in skb_flow_dissect and friends

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 44 insertions, 39 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index b01c7fb..f83aa65 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1935,8 +1935,8 @@ static inline void skb_probe_transport_header(struct sk_buff *skb,
 
 	if (skb_transport_header_was_set(skb))
 		return;
-	else if (skb_flow_dissect(skb, &keys))
-		skb_set_transport_header(skb, keys.thoff);
+	else if (skb_flow_dissect_flow_keys(skb, &keys))
+		skb_set_transport_header(skb, keys.basic.thoff);
 	else
 		skb_set_transport_header(skb, offset_hint);
 }
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
index 20239e8..0c8d406 100644
--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -59,42 +59,47 @@ struct flow_dissector {
 	unsigned short int offset[FLOW_DISSECTOR_KEY_MAX];
 };
 
-/* struct flow_keys:
- *	@src: source ip address in case of IPv4
- *	      For IPv6 it contains 32bit hash of src address
- *	@dst: destination ip address in case of IPv4
- *	      For IPv6 it contains 32bit hash of dst address
- *	@ports: port numbers of Transport header
- *		port16[0]: src port number
- *		port16[1]: dst port number
- *	@thoff: Transport header offset
- *	@n_proto: Network header protocol (eg. IPv4/IPv6)
- *	@ip_proto: Transport header protocol (eg. TCP/UDP)
- * All the members, except thoff, are in network byte order.
- */
-struct flow_keys {
-	/* (src,dst) must be grouped, in the same way than in IP header */
-	__be32 src;
-	__be32 dst;
-	union {
-		__be32 ports;
-		__be16 port16[2];
-	};
-	u16	thoff;
-	__be16	n_proto;
-	u8	ip_proto;
-};
-
 void skb_flow_dissector_init(struct flow_dissector *flow_dissector,
 			     const struct flow_dissector_key *key,
 			     unsigned int key_count);
-bool __skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow,
+
+bool __skb_flow_dissect(const struct sk_buff *skb,
+			struct flow_dissector *flow_dissector,
+			void *target_container,
 			void *data, __be16 proto, int nhoff, int hlen);
 
 static inline bool skb_flow_dissect(const struct sk_buff *skb,
-				    struct flow_keys *flow)
+				    struct flow_dissector *flow_dissector,
+				    void *target_container)
+{
+	return __skb_flow_dissect(skb, flow_dissector, target_container,
+				  NULL, 0, 0, 0);
+}
+
+struct flow_keys {
+	struct flow_dissector_key_addrs addrs;
+	struct flow_dissector_key_ports ports;
+	struct flow_dissector_key_basic basic;
+};
+
+extern struct flow_dissector flow_keys_dissector;
+extern struct flow_dissector flow_keys_buf_dissector;
+
+static inline bool skb_flow_dissect_flow_keys(const struct sk_buff *skb,
+					      struct flow_keys *flow)
+{
+	memset(flow, 0, sizeof(*flow));
+	return __skb_flow_dissect(skb, &flow_keys_dissector, flow,
+				  NULL, 0, 0, 0);
+}
+
+static inline bool skb_flow_dissect_flow_keys_buf(struct flow_keys *flow,
+						  void *data, __be16 proto,
+						  int nhoff, int hlen)
 {
-	return __skb_flow_dissect(skb, flow, NULL, 0, 0, 0);
+	memset(flow, 0, sizeof(*flow));
+	return __skb_flow_dissect(NULL, &flow_keys_buf_dissector, flow,
+				  data, proto, nhoff, hlen);
 }
 
 __be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto,
diff --git a/include/net/ip.h b/include/net/ip.h
index 562eb65..b0443d4 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -360,10 +360,10 @@ static inline void inet_set_txhash(struct sock *sk)
 	struct inet_sock *inet = inet_sk(sk);
 	struct flow_keys keys;
 
-	keys.src = inet->inet_saddr;
-	keys.dst = inet->inet_daddr;
-	keys.port16[0] = inet->inet_sport;
-	keys.port16[1] = inet->inet_dport;
+	keys.addrs.src = inet->inet_saddr;
+	keys.addrs.dst = inet->inet_daddr;
+	keys.ports.port16[0] = inet->inet_sport;
+	keys.ports.port16[1] = inet->inet_dport;
 
 	sk->sk_txhash = flow_hash_from_keys(&keys);
 }
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 9932b86..9eed976 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -698,10 +698,10 @@ static inline void ip6_set_txhash(struct sock *sk)
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct flow_keys keys;
 
-	keys.src = (__force __be32)ipv6_addr_hash(&np->saddr);
-	keys.dst = (__force __be32)ipv6_addr_hash(&sk->sk_v6_daddr);
-	keys.port16[0] = inet->inet_sport;
-	keys.port16[1] = inet->inet_dport;
+	keys.addrs.src = (__force __be32)ipv6_addr_hash(&np->saddr);
+	keys.addrs.dst = (__force __be32)ipv6_addr_hash(&sk->sk_v6_daddr);
+	keys.ports.port16[0] = inet->inet_sport;
+	keys.ports.port16[1] = inet->inet_dport;
 
 	sk->sk_txhash = flow_hash_from_keys(&keys);
 }