linux-kernel - ebtables match inverted in 2.6.28?

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Message-ID: <84ee33570812311400m5492af64n45c645a13fe91c2c@mail.gmail.com>
Date:	Wed, 31 Dec 2008 17:00:19 -0500
From:	"Matt Cross" <matt.cross@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: ebtables match inverted in 2.6.28?

I think the work to move ebtables to use xtables broke ebtables.
Specifically, in commit 8cc784eec6676b58e7f60419c88179aaa97bf71c the
return value of the match functions was inverted so that they return 1
(true) on matches instead of EBT_MATCH (0), and vice versa (look in
ebt_ip.c).  The logic in ebtables.c (ebt_do_table() and
EBT_MATCH_ITERATE()) expect match functions to return 0 for matches.

The patch at the end of this message fixes the problem, but seems a
little hacky to me.  Who's the right person to address this?

    -Matt

--- linux-2.6.28.orig/net/bridge/netfilter/ebtables.c   2008-12-24
18:26:37.000000000 -0500
+++ linux-2.6.28/net/bridge/netfilter/ebtables.c        2008-12-31
16:17:44.000000000 -0500
@@ -80,7 +80,7 @@
 {
        par->match     = m->u.match;
        par->matchinfo = m->data;
-       return m->u.match->match(skb, par);
+       return !m->u.match->match(skb, par);
 }

 static inline int ebt_dev_check(char *entry, const struct net_device *device)
--
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