[IPSEC]: Move IP length/checksum setting out of transforms
This patch moves the setting of the IP length and checksum fields out of
the transforms and into the xfrmX_output functions. This would help future
efforts in merging the transforms themselves.
It also adds an optimisation to ipcomp due to the fact that the transport
offset is guaranteed to be zero.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/xfrm4_mode_tunnel.c b/net/ipv4/xfrm4_mode_tunnel.c
index f1d41ea3..1ae9d32 100644
--- a/net/ipv4/xfrm4_mode_tunnel.c
+++ b/net/ipv4/xfrm4_mode_tunnel.c
@@ -31,10 +31,7 @@
/* Add encapsulation header.
*
- * The top IP header will be constructed per RFC 2401. The following fields
- * in it shall be filled in by x->type->output:
- * tot_len
- * check
+ * The top IP header will be constructed per RFC 2401.
*/
static int xfrm4_tunnel_output(struct xfrm_state *x, struct sk_buff *skb)
{
