[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>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 5fc346d8b566..a989d29b44ea 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -177,9 +177,8 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb)
                 err = ah_mac_digest(ahp, skb, ah->auth_data);
                 if (err)
                         goto out;
-                err = -EINVAL;
                 if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) {
-                        x->stats.integrity_failed++;
+                        err = -EBADMSG;
                         goto out;
                 }
         }