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 2b2960fcc878c126c91e7cbded47ba959f10f84a..f957f7c4fa20fe28955737042f70d8b625e01f56 100644 (file)
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2026,6 +2026,7 @@ void sk_reset_timer(struct sock *sk, struct timer_list *timer,
 
 void sk_stop_timer(struct sock *sk, struct timer_list *timer);
 
+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 sock_queue_err_skb(struct sock *sk, struct sk_buff *skb);

diff --git a/net/core/sock.c b/net/core/sock.c
index ac9aa2878d996b3f69a9e1d61a104b65a2996af5..504a2a96ff79026bc4ff0ce06ccdd0f11173142e 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -432,9 +432,8 @@ static void sock_disable_timestamp(struct sock *sk, unsigned long flags)
 }
 
 
-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;
@@ -445,10 +444,6 @@ 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, skb->truesize)) {
                atomic_inc(&sk->sk_drops);
                return -ENOBUFS;
@@ -478,6 +473,18 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
                sk->sk_data_ready(sk);
        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)