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>

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 7640822..cb6d9b3 100644 (file)
--- 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;
 };
 

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 325053d..4286fd3 100644 (file)
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -208,7 +208,7 @@ static int ah_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/ipv4/esp4.c b/net/ipv4/esp4.c
index e42a905..882dbbb 100644 (file)
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -215,7 +215,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
        }
 
        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,
@@ -227,7 +227,7 @@ static int esp_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);

diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 1aba54a..2195ae6 100644 (file)
--- 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 1b5c982..c7b5d5e 100644 (file)
--- 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);

diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 45f1c98..b173b7f 100644 (file)
--- 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 64f2ae1..4b63776 100644 (file)
--- 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--;