net: Make RFS socket operations not be inet specific.
Idea from Eric Dumazet.
As for placement inside of struct sock, I tried to choose a place
that otherwise has a 32-bit hole on 64-bit systems.
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
diff --git a/include/net/sock.h b/include/net/sock.h
index 4081db8..0782228 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -198,6 +198,7 @@
* @sk_rcvlowat: %SO_RCVLOWAT setting
* @sk_rcvtimeo: %SO_RCVTIMEO setting
* @sk_sndtimeo: %SO_SNDTIMEO setting
+ * @sk_rxhash: flow hash received from netif layer
* @sk_filter: socket filtering instructions
* @sk_protinfo: private area, net family specific, when not using slab
* @sk_timer: sock cleanup timer
@@ -279,6 +280,9 @@
int sk_gso_type;
unsigned int sk_gso_max_size;
int sk_rcvlowat;
+#ifdef CONFIG_RPS
+ __u32 sk_rxhash;
+#endif
unsigned long sk_flags;
unsigned long sk_lingertime;
struct sk_buff_head sk_error_queue;
@@ -620,6 +624,40 @@
return sk->sk_backlog_rcv(sk, skb);
}
+static inline void sock_rps_record_flow(const struct sock *sk)
+{
+#ifdef CONFIG_RPS
+ struct rps_sock_flow_table *sock_flow_table;
+
+ rcu_read_lock();
+ sock_flow_table = rcu_dereference(rps_sock_flow_table);
+ rps_record_sock_flow(sock_flow_table, sk->sk_rxhash);
+ rcu_read_unlock();
+#endif
+}
+
+static inline void sock_rps_reset_flow(const struct sock *sk)
+{
+#ifdef CONFIG_RPS
+ struct rps_sock_flow_table *sock_flow_table;
+
+ rcu_read_lock();
+ sock_flow_table = rcu_dereference(rps_sock_flow_table);
+ rps_reset_sock_flow(sock_flow_table, sk->sk_rxhash);
+ rcu_read_unlock();
+#endif
+}
+
+static inline void sock_rps_save_rxhash(struct sock *sk, u32 rxhash)
+{
+#ifdef CONFIG_RPS
+ if (unlikely(sk->sk_rxhash != rxhash)) {
+ sock_rps_reset_flow(sk);
+ sk->sk_rxhash = rxhash;
+ }
+#endif
+}
+
#define sk_wait_event(__sk, __timeo, __condition) \
({ int __rc; \
release_sock(__sk); \