[PATCH] sk-filter: Rate-limit WARNing, print dbg info.

[greearb@candelatech.com]

From: Ben Greear <greearb@candelatech.com>

A mis-configured filter can spam the logs with
lots of stack traces.  Rate-limit the warnings
and add printout of the bogus filter information.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
:100644 100644 afc5837... 8249745... M	net/core/filter.c
 net/core/filter.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/net/core/filter.c b/net/core/filter.c
index afc5837..8249745 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -409,7 +409,13 @@ load_b:
 			continue;
 		}
 		default:
-			WARN_ON(1);
+			if (net_ratelimit()) {
+				pr_err("filter: Unknown code: %hu jt: %u tf: %u"
+				       " k: %u\n",
+				       fentry->code, (unsigned int)(fentry->jt),
+				       (unsigned int)(fentry->jf), fentry->k);
+				WARN_ON(1);
+			}
 			return 0;
 		}
 	}
-- 
1.7.3.4