[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>

1 files changed, 4 insertions, 1 deletions

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 280f8ded975..d83227baaa0 100644
--- 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;
                         }