[IPV4]: Add ip_local_out

Most callers of the LOCAL_OUT chain will set the IP packet length and
header checksum before doing so.  They also share the same output
function dst_output.

This patch creates a new function called ip_local_out which does all
of that and converts the appropriate users over to it.

Apart from removing duplicate code, it will also help in merging the
IPsec output path once the same thing is done for IPv6.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/net/ipv4/ipvs/ip_vs_xmit.c b/net/ipv4/ipvs/ip_vs_xmit.c
index 7c074e386c1..66775ad9e32 100644
--- a/net/ipv4/ipvs/ip_vs_xmit.c
+++ b/net/ipv4/ipvs/ip_vs_xmit.c
@@ -16,8 +16,8 @@
  */
 
 #include <linux/kernel.h>
-#include <linux/ip.h>
 #include <linux/tcp.h>                  /* for tcphdr */
+#include <net/ip.h>
 #include <net/tcp.h>                    /* for csum_tcpudp_magic */
 #include <net/udp.h>
 #include <net/icmp.h>                   /* for icmp_send */
@@ -406,14 +406,12 @@ ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
         iph->daddr              =       rt->rt_dst;
         iph->saddr              =       rt->rt_src;
         iph->ttl                =       old_iph->ttl;
-        iph->tot_len            =       htons(skb->len);
         ip_select_ident(iph, &rt->u.dst, NULL);
-        ip_send_check(iph);
 
         /* Another hack: avoid icmp_send in ip_fragment */
         skb->local_df = 1;
 
-        IP_VS_XMIT(skb, rt);
+        ip_local_out(skb);
 
         LeaveFunction(10);