net: Add __sock_queue_rcv_skb()

Extraxcted from commit e6afc8ace6dd5cef5e812f26c72579da8806f5ac
"udp: remove headers from UDP packets before queueing".

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/include/net/sock.h b/include/net/sock.h
index 38fcee9..3a79fae 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1629,6 +1629,7 @@ extern void sk_reset_timer(struct sock *sk, struct timer_list* timer,
 
 extern void sk_stop_timer(struct sock *sk, struct timer_list* timer);
 
+int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
 extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
 
 extern int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);

diff --git a/net/core/sock.c b/net/core/sock.c
index 1c72ae7..43c1b71 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -281,9 +281,8 @@ static void sock_disable_timestamp(struct sock *sk, int flag)
 }
 
 
-int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+int __sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 {
-       int err;
        int skb_len;
        unsigned long flags;
        struct sk_buff_head *list = &sk->sk_receive_queue;
@@ -294,10 +293,6 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                return -ENOMEM;
        }
 
-       err = sk_filter(sk, skb);
-       if (err)
-               return err;
-
        if (!sk_rmem_schedule(sk, skb->truesize)) {
                atomic_inc(&sk->sk_drops);
                return -ENOBUFS;
@@ -327,6 +322,18 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                sk->sk_data_ready(sk, skb_len);
        return 0;
 }
+EXPORT_SYMBOL(__sock_queue_rcv_skb);
+
+int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+       int err;
+
+       err = sk_filter(sk, skb);
+       if (err)
+               return err;
+
+       return __sock_queue_rcv_skb(sk, skb);
+}
 EXPORT_SYMBOL(sock_queue_rcv_skb);
 
 int sk_receive_skb(struct sock *sk, struct sk_buff *skb, const int nested)