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/ipv6/ah6.c b/net/ipv6/ah6.c
index 1aba54ae53c4..2195ae651923 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -409,7 +409,7 @@ static int ah6_output(struct xfrm_state *x, struct sk_buff *skb)
 
         ah->reserved = 0;
         ah->spi = x->id.spi;
-        ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output);
+        ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
 
         sg_init_table(sg, nfrags);
         skb_to_sgvec(skb, sg, 0, skb->len);
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 1b5c9825743b..c7b5d5ee0dee 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -204,7 +204,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
         *skb_mac_header(skb) = IPPROTO_ESP;
 
         esph->spi = x->id.spi;
-        esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output);
+        esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
 
         sg_init_table(sg, nfrags);
         skb_to_sgvec(skb, sg,
@@ -216,7 +216,7 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
         aead_givcrypt_set_crypt(req, sg, sg, clen, iv);
         aead_givcrypt_set_assoc(req, asg, sizeof(*esph));
         aead_givcrypt_set_giv(req, esph->enc_data,
-                              XFRM_SKB_CB(skb)->seq.output);
+                              XFRM_SKB_CB(skb)->seq.output.low);
 
         ESP_SKB_CB(skb)->tmp = tmp;
         err = crypto_aead_givencrypt(req);