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/inet_sock.h b/include/net/inet_sock.h
index c1d4295..1653de5 100644 (file)
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -102,7 +102,6 @@ struct rtable;
  * @uc_ttl - Unicast TTL
  * @inet_sport - Source port
  * @inet_id - ID counter for DF pkts
- * @rxhash - flow hash received from netif layer
  * @tos - TOS
  * @mc_ttl - Multicasting TTL
  * @is_icsk - is this an inet_connection_sock?
@@ -126,9 +125,6 @@ struct inet_sock {
        __u16                   cmsg_flags;
        __be16                  inet_sport;
        __u16                   inet_id;
-#ifdef CONFIG_RPS
-       __u32                   rxhash;
-#endif
 
        struct ip_options       *opt;
        __u8                    tos;
@@ -224,37 +220,4 @@ static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
        return inet_sk(sk)->transparent ? FLOWI_FLAG_ANYSRC : 0;
 }
 
-static inline void inet_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, inet_sk(sk)->rxhash);
-       rcu_read_unlock();
-#endif
-}
-
-static inline void inet_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, inet_sk(sk)->rxhash);
-       rcu_read_unlock();
-#endif
-}
-
-static inline void inet_rps_save_rxhash(struct sock *sk, u32 rxhash)
-{
-#ifdef CONFIG_RPS
-       if (unlikely(inet_sk(sk)->rxhash != rxhash)) {
-               inet_rps_reset_flow(sk);
-               inet_sk(sk)->rxhash = rxhash;
-       }
-#endif
-}
 #endif /* _INET_SOCK_H */

diff --git a/include/net/sock.h b/include/net/sock.h
index 4081db8..0782228 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -198,6 +198,7 @@ struct sock_common {
   *    @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 @@ struct sock {
        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 @@ static inline int sk_backlog_rcv(struct sock *sk, struct sk_buff *skb)
        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);                                     \

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 9f52880..c6c43bc 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -419,7 +419,7 @@ int inet_release(struct socket *sock)
        if (sk) {
                long timeout;
 
-               inet_rps_reset_flow(sk);
+               sock_rps_reset_flow(sk);
 
                /* Applications forget to leave groups before exiting */
                ip_mc_drop_socket(sk);
@@ -722,7 +722,7 @@ int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
 {
        struct sock *sk = sock->sk;
 
-       inet_rps_record_flow(sk);
+       sock_rps_record_flow(sk);
 
        /* We may need to bind the socket. */
        if (!inet_sk(sk)->inet_num && inet_autobind(sk))
@@ -737,7 +737,7 @@ static ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
 {
        struct sock *sk = sock->sk;
 
-       inet_rps_record_flow(sk);
+       sock_rps_record_flow(sk);
 
        /* We may need to bind the socket. */
        if (!inet_sk(sk)->inet_num && inet_autobind(sk))
@@ -755,7 +755,7 @@ int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
        int addr_len = 0;
        int err;
 
-       inet_rps_record_flow(sk);
+       sock_rps_record_flow(sk);
 
        err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT,
                                   flags & ~MSG_DONTWAIT, &addr_len);

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 4d6717d..771f814 100644 (file)
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1672,7 +1672,7 @@ process:
 
        skb->dev = NULL;
 
-       inet_rps_save_rxhash(sk, skb->rxhash);
+       sock_rps_save_rxhash(sk, skb->rxhash);
 
        bh_lock_sock_nested(sk);
        ret = 0;

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 1e18f9c..fa3d287 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1217,7 +1217,7 @@ int udp_disconnect(struct sock *sk, int flags)
        sk->sk_state = TCP_CLOSE;
        inet->inet_daddr = 0;
        inet->inet_dport = 0;
-       inet_rps_save_rxhash(sk, 0);
+       sock_rps_save_rxhash(sk, 0);
        sk->sk_bound_dev_if = 0;
        if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK))
                inet_reset_saddr(sk);
@@ -1262,7 +1262,7 @@ static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
        int rc;
 
        if (inet_sk(sk)->inet_daddr)
-               inet_rps_save_rxhash(sk, skb->rxhash);
+               sock_rps_save_rxhash(sk, skb->rxhash);
 
        rc = sock_queue_rcv_skb(sk, skb);
        if (rc < 0) {