[XFRM] Statistics: Add outbound-dropping error.

o Increment PolError counter when flow_cache_lookup() returns
  errored pointer.

o Increment NoStates counter at larval-drop.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 280f8ded975ca79826f5db857f72d91d1eae5d2d..d83227baaa093f1103e3593bfa3c62df6c8e09ed 100644 (file)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1510,8 +1510,10 @@ restart:
                policy = flow_cache_lookup(fl, dst_orig->ops->family,
                                           dir, xfrm_policy_lookup);
                err = PTR_ERR(policy);
-               if (IS_ERR(policy))
+               if (IS_ERR(policy)) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMOUTPOLERROR);
                        goto dropdst;
+               }
        }
 
        if (!policy)
@@ -1603,6 +1605,7 @@ restart:
                                /* EREMOTE tells the caller to generate
                                 * a one-shot blackhole route.
                                 */
+                               XFRM_INC_STATS(LINUX_MIB_XFRMOUTNOSTATES);
                                xfrm_pol_put(policy);
                                return -EREMOTE;
                        }