ipip: Use tunnel_ip_select_ident() for tunnel IP-Identification.

tunnel_ip_select_ident() is more efficient when generating ip-header
id given inner packet is of ipv4 type.

Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 20 insertions, 1 deletions

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 8f024d41eefa..18f535299ef9 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -478,6 +478,8 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
         __be32 dst = tiph->daddr;
         struct flowi4 fl4;
         int    mtu;
+        int err;
+        int pkt_len;
 
         if (skb->protocol != htons(ETH_P_IP))
                 goto tx_error;
@@ -591,11 +593,28 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
         iph->tos                =       INET_ECN_encapsulate(tos, old_iph->tos);
         iph->daddr              =       fl4.daddr;
         iph->saddr              =       fl4.saddr;
+        tunnel_ip_select_ident(skb, old_iph, &rt->dst);
 
         if ((iph->ttl = tiph->ttl) == 0)
                 iph->ttl        =       old_iph->ttl;
 
-        iptunnel_xmit(skb, dev);
+        nf_reset(skb);
+        skb->ip_summed = CHECKSUM_NONE;
+
+        pkt_len = skb->len - skb_transport_offset(skb);
+        err = ip_local_out(skb);
+        if (likely(net_xmit_eval(err) == 0)) {
+                struct pcpu_tstats *tstats = this_cpu_ptr(dev->tstats);
+
+                u64_stats_update_begin(&tstats->syncp);
+                tstats->tx_bytes += pkt_len;
+                tstats->tx_packets++;
+                u64_stats_update_end(&tstats->syncp);
+        } else {
+                dev->stats.tx_errors++;
+                dev->stats.tx_aborted_errors++;
+        }
+
         return NETDEV_TX_OK;
 
 tx_error_icmp: