netfilter: Make nflog quiet when no one listen in userspace.

The message "nf_log_packet: can't log since no backend logging module loaded
in! Please either load one, or disable logging explicitly" was displayed for
each logged packet when no userspace application is listening to nflog events.
The message seems to warn for a problem with a kernel module missing but as
said before this is not the case. I thus propose to suppress the message (I
don't see any reason to flood the log because a user application has crashed.)

Signed-off-by: Eric Leblond <eric@inl.fr>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 4 deletions

diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index bc11d7092032..9fda6ee95a31 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -92,10 +92,6 @@ void nf_log_packet(int pf,
                 vsnprintf(prefix, sizeof(prefix), fmt, args);
                 va_end(args);
                 logger->logfn(pf, hooknum, skb, in, out, loginfo, prefix);
-        } else if (net_ratelimit()) {
-                printk(KERN_WARNING "nf_log_packet: can\'t log since "
-                       "no backend logging module loaded in! Please either "
-                       "load one, or disable logging explicitly\n");
         }
         rcu_read_unlock();
 }