xfrm: Use separate low and high order bits of the sequence numbers in xfrm_skb_cb

To support IPsec extended sequence numbers, we split the
output sequence numbers of xfrm_skb_cb in low and high order 32 bits
and we add the high order 32 bits to the input sequence numbers.
All users are updated accordingly.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 7640822bc515..cb6d9b3fc55e 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -582,8 +582,14 @@ struct xfrm_skb_cb {
 
         /* Sequence number for replay protection. */
         union {
-                u64 output;
-                __be32 input;
+                struct {
+                        __u32 low;
+                        __u32 hi;
+                } output;
+                struct {
+                        __be32 low;
+                        __be32 hi;
+                } input;
         } seq;
 };