ebtables match inverted in 2.6.28?

From: Matt Cross
Date: Wed Dec 31 2008 - 17:00:31 EST


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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