ipv4: Use inet_csk_route_child_sock() in DCCP and TCP.

Operation order is now transposed, we first create the child
socket then we try to hook up the route.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 10 insertions, 9 deletions

diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 4ac1a728083a..46b15e9e9b57 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -396,15 +396,10 @@ struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb,
         if (sk_acceptq_is_full(sk))
                 goto exit_overflow;
 
-        if (dst == NULL && (dst = inet_csk_route_req(sk, req)) == NULL)
-                goto exit;
-
         newsk = dccp_create_openreq_child(sk, req, skb);
         if (newsk == NULL)
                 goto exit_nonewsk;
 
-        sk_setup_caps(newsk, dst);
-
         newinet            = inet_sk(newsk);
         ireq               = inet_rsk(req);
         newinet->inet_daddr     = ireq->rmt_addr;
@@ -416,12 +411,15 @@ struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb,
         newinet->mc_ttl    = ip_hdr(skb)->ttl;
         newinet->inet_id   = jiffies;
 
+        if (dst == NULL && (dst = inet_csk_route_child_sock(sk, newsk, req)) == NULL)
+                goto put_and_exit;
+
+        sk_setup_caps(newsk, dst);
+
         dccp_sync_mss(newsk, dst_mtu(dst));
 
-        if (__inet_inherit_port(sk, newsk) < 0) {
-                sock_put(newsk);
-                goto exit;
-        }
+        if (__inet_inherit_port(sk, newsk) < 0)
+                goto put_and_exit;
         __inet_hash_nolisten(newsk, NULL);
 
         return newsk;
@@ -433,6 +431,9 @@ exit_nonewsk:
 exit:
         NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS);
         return NULL;
+put_and_exit:
+        sock_put(newsk);
+        goto exit;
 }
 
 EXPORT_SYMBOL_GPL(dccp_v4_request_recv_sock);