datapath: rtable may not have a u. member

This brings the code up to sync with the kernel as
of changeset "net-next: remove useless union keyword",
which was added between 2.6.35 and 2.6.36-rc1

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Jesse Gross <jesse@nicira.com>

diff --git a/datapath/vport-gre.c b/datapath/vport-gre.c
index b471b08aea6771b0e61a12e10dc1e1926dc92027..2ab08f1151a23039e7f80302a851a8481efeb5e9 100644 (file)
--- a/datapath/vport-gre.c
+++ b/datapath/vport-gre.c
@@ -44,6 +44,12 @@
  * number of options. */
 #define GRE_HEADER_SECTION 4
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
+#define rt_dst(rt) (rt->dst)
+#else
+#define rt_dst(rt) (rt->u.dst)
+#endif
+
 struct gre_base_hdr {
        __be16 flags;
        __be16 protocol;
@@ -963,7 +969,7 @@ static int build_packet(struct vport *vport, const struct mutable_config *mutabl
 
        memcpy(new_iph, iph, sizeof(struct iphdr));
        new_iph->frag_off = frag_off;
-       ip_select_ident(new_iph, &rt->u.dst, NULL);
+       ip_select_ident(new_iph, &rt_dst(rt), NULL);
 
        create_gre_header(skb, mutable);
 
@@ -1057,11 +1063,11 @@ static int gre_send(struct vport *vport, struct sk_buff *skb)
 #endif
        }
        if (!iph.ttl)
-               iph.ttl = dst_metric(&rt->u.dst, RTAX_HOPLIMIT);
+               iph.ttl = dst_metric(&rt_dst(rt), RTAX_HOPLIMIT);
 
        iph.frag_off = (mutable->port_config.flags & GRE_F_PMTUD) ? htons(IP_DF) : 0;
        if (iph.frag_off)
-               mtu = dst_mtu(&rt->u.dst)
+               mtu = dst_mtu(&rt_dst(rt))
                        - ETH_HLEN
                        - mutable->tunnel_hlen
                        - (eth_hdr(skb)->h_proto == htons(ETH_P_8021Q) ? VLAN_HLEN : 0);
@@ -1086,7 +1092,7 @@ static int gre_send(struct vport *vport, struct sk_buff *skb)
        nf_reset(skb);
        secpath_reset(skb);
        skb_dst_drop(skb);
-       skb_dst_set(skb, &rt->u.dst);
+       skb_dst_set(skb, &rt_dst(rt));
 
        /* If we are doing GSO on a pskb it is better to make sure that the
         * headroom is correct now.  We will only have to copy the portion in
@@ -1094,7 +1100,7 @@ static int gre_send(struct vport *vport, struct sk_buff *skb)
         * the segments.  This is particularly beneficial on Xen where we get
         * lots of GSO pskbs.  Conversely, we delay copying if it is just to
         * get our own writable clone because GSO may do the copy for us. */
-       max_headroom = LL_RESERVED_SPACE(rt->u.dst.dev) + rt->u.dst.header_len
+       max_headroom = LL_RESERVED_SPACE(rt_dst(rt).dev) + rt_dst(rt).header_len
                        + mutable->tunnel_hlen;
 
        if (skb_headroom(skb) < max_headroom) {