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

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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>
This commit is contained in:
Pravin B Shelar 2013-03-08 15:12:45 +00:00 committed by David S. Miller
parent 720a43efd3
commit 8344bfc600
1 changed files with 20 additions and 1 deletions
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21
net/ipv4/ipip.c
View file

@ -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: