From: Stephen Hemminger <shemminger@vyatta.com>
To: Ben Hutchings <ben@decadent.org.uk>, Thomas Graf <tgraf@infradead.org>
Cc: "Bruno Prémont" <bonbons@linux-vserver.org>,
netdev@vger.kernel.org, "Greg Rose" <gregory.v.rose@intel.com>
Subject: Re: netlink: 12 bytes leftover after parsing attributes - triggered by iproute2 libnetlink's rtnl_dump_request()
Date: Tue, 20 Mar 2012 17:02:29 -0700 [thread overview]
Message-ID: <20120320170229.49de95f5@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <1332255630.8043.11.camel@deadeye>
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On Tue, 20 Mar 2012 15:00:30 +0000
Ben Hutchings <ben@decadent.org.uk> wrote:
> On Tue, 2012-03-20 at 07:41 -0700, Stephen Hemminger wrote:
> >
> > >
> > > Should this get fixed at kernel level, iproute2 libnetlink level or
> > > at end-user level (e.g. collectd)?
> > > Three lines every 10 seconds is a damn lot!
> > >
> > > Thanks,
> > > Bruno
> >
> > Netlink is supposed to be encoded as Type-Length-Value and correctly written
> > programs ignore types they don't understand. So either the library is getting
> > confused by the type or the attribute is not encoded correctly.
> >
> >
> > The issue could be in libnetlink library. What version of collectd and libnetlink
> > are you using?
>
> This was also reported as provoked by a client using the ntrack
> rtnetlink code: http://thread.gmane.org/gmane.linux.network/224236
>
> Ben.
>
The message "netlink: NN bytes leftover after processing attributes."
comes from libnl, not libnetlink.
The code in nla_parse() is getting confused.
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next prev parent reply other threads:[~2012-03-21 0:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-20 12:41 netlink: 12 bytes leftover after parsing attributes - triggered by iproute2 libnetlink's rtnl_dump_request() Bruno Prémont
2012-03-20 14:41 ` Stephen Hemminger
2012-03-20 15:00 ` Bruno Prémont
2012-03-20 15:09 ` Stephen Hemminger
2012-03-20 15:00 ` Ben Hutchings
2012-03-21 0:02 ` Stephen Hemminger [this message]
2012-04-03 10:01 ` Thomas Graf
2012-04-03 10:17 ` Bruno Prémont
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