[IPSEC]: Move integrity stat collection into xfrm_input

Similar to the moving out of the replay processing on the output, this
patch moves the integrity stat collectin from x->type->input into
xfrm_input.

This would eventually allow transforms such as AH/ESP to be lockless.

The error value EBADMSG (currently unused in the crypto layer) is used
to indicate a failed integrity check.  In future this error can be
directly returned by the crypto layer once we switch to aead
algorithms.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 4 deletions

diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 4eaf55072b1b..d4b59ecb0b57 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -379,10 +379,9 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
                 err = ah_mac_digest(ahp, skb, ah->auth_data);
                 if (err)
                         goto free_out;
-                err = -EINVAL;
                 if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) {
                         LIMIT_NETDEBUG(KERN_WARNING "ipsec ah authentication error\n");
-                        x->stats.integrity_failed++;
+                        err = -EBADMSG;
                         goto free_out;
                 }
         }
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 444053254676..096974ba6420 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -177,8 +177,7 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
                         BUG();
 
                 if (unlikely(memcmp(esp->auth.work_icv, sum, alen))) {
-                        x->stats.integrity_failed++;
-                        ret = -EINVAL;
+                        ret = -EBADMSG;
                         goto out;
                 }
         }