From: Hans Schillstrom <hans.schillstrom@ericsson.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jan Engelhardt <jengelh@inai.de>,
Pablo Neira Ayuso <pablo@netfilter.org>,
"kaber@trash.net" <kaber@trash.net>,
"jengelh@medozas.de" <jengelh@medozas.de>,
"netfilter-devel@vger.kernel.org"
<netfilter-devel@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"dan.carpenter@oracle.com" <dan.carpenter@oracle.com>,
"hans@schillstrom.com" <hans@schillstrom.com>
Subject: Re: [PATCH] netfilter: xt_HMARK: endian bugs
Date: Mon, 14 May 2012 18:09:16 +0200 [thread overview]
Message-ID: <201205141809.18174.hans.schillstrom@ericsson.com> (raw)
In-Reply-To: <1337009079.8512.535.camel@edumazet-glaptop>
On Monday 14 May 2012 17:24:39 Eric Dumazet wrote:
> On Mon, 2012-05-14 at 17:05 +0200, Jan Engelhardt wrote:
> > On Monday 2012-05-14 16:40, Pablo Neira Ayuso wrote:
> >
> > >> - if (t->uports.p16.dst < t->uports.p16.src)
> > >> + if (ntohs(t->uports.p16.dst) < ntohs(t->uports.p16.src))
> > >
> > >Do we really need this to make sparse happy?
> >
> > You need it to make *maths* happy.
> >
> > Consider
> >
> > 384 < 65407
> >
> > but
> >
> > ntohs(384) > ntohs(65407)
> > <=> 32769 > 32767
> > --
>
> Doesnt matter at all in this context.
This context can contain both le & be machines,
so at least in hmark it make sense
> Take a look at
>
> void __skb_get_rxhash(struct sk_buff *skb)
>
> if ((__force u16)keys.port16[1] < (__force u16)keys.port16[0])
> swap(...)
>
>
--
Regards
Hans Schillstrom <hans.schillstrom@ericsson.com>
next prev parent reply other threads:[~2012-05-14 16:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-14 13:42 [PATCH] netfilter: xt_HMARK: endian bugs Hans Schillstrom
2012-05-14 14:40 ` Pablo Neira Ayuso
2012-05-14 15:05 ` Hans Schillstrom
2012-05-14 15:05 ` Jan Engelhardt
2012-05-14 15:24 ` Eric Dumazet
2012-05-14 16:09 ` Hans Schillstrom [this message]
2012-05-14 16:24 ` Eric Dumazet
2012-05-14 17:51 ` Hans Schillstrom
2012-05-14 18:24 ` Jan Engelhardt
2012-05-14 18:28 ` Eric Dumazet
2012-05-14 18:35 ` Jozsef Kadlecsik
2012-05-14 19:02 ` Pablo Neira Ayuso
2012-05-14 19:13 ` Eric Dumazet
2012-05-15 5:57 ` Hans Schillström
2012-05-15 7:33 ` Hans Schillström
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