[XFRM] IPv6: Fix dst/routing check at transformation.

IPv6 specific thing is wrongly removed from transformation at net-2.6.25.
This patch recovers it with current design.

o Update "path" of xfrm_dst since IPv6 transformation should
  care about routing changes. It is required by MIPv6 and
  off-link destined IPsec.
o Rename nfheader_len which is for non-fragment transformation used by
  MIPv6 to rt6i_nfheader_len as IPv6 name space.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 4 insertions, 1 deletions

diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 14830edc2ac0..d8d85b13364d 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -101,7 +101,7 @@ struct rt6_info
         atomic_t                        rt6i_ref;
 
         /* more non-fragment space at head required */
-        unsigned short                  nfheader_len;
+        unsigned short                  rt6i_nfheader_len;
 
         u8                              rt6i_protocol;
 
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index d6dae5ae7abe..eea1c327c93e 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -242,6 +242,9 @@ struct xfrm_policy_afinfo {
                                                   struct flowi *fl,
                                                   int reverse);
         int                     (*get_tos)(struct flowi *fl);
+        int                     (*init_path)(struct xfrm_dst *path,
+                                             struct dst_entry *dst,
+                                             int nfheader_len);
         int                     (*fill_dst)(struct xfrm_dst *xdst,
                                             struct net_device *dev);
 };