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>

2 files changed, 3 insertions, 3 deletions

diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 45f1c98d4fce..b173b7fdc433 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -118,7 +118,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
         if (encap_type < 0) {
                 async = 1;
                 x = xfrm_input_state(skb);
-                seq = XFRM_SKB_CB(skb)->seq.input;
+                seq = XFRM_SKB_CB(skb)->seq.input.low;
                 goto resume;
         }
 
@@ -184,7 +184,7 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
 
                 spin_unlock(&x->lock);
 
-                XFRM_SKB_CB(skb)->seq.input = seq;
+                XFRM_SKB_CB(skb)->seq.input.low = seq;
 
                 nexthdr = x->type->input(x, skb);
 
diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index 64f2ae1fdc15..4b63776a0264 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -68,7 +68,7 @@ static int xfrm_output_one(struct sk_buff *skb, int err)
                 }
 
                 if (x->type->flags & XFRM_TYPE_REPLAY_PROT) {
-                        XFRM_SKB_CB(skb)->seq.output = ++x->replay.oseq;
+                        XFRM_SKB_CB(skb)->seq.output.low = ++x->replay.oseq;
                         if (unlikely(x->replay.oseq == 0)) {
                                 XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATESEQERROR);
                                 x->replay.oseq--;