net 2.6.16-rc1: multiple ipv6 failures

net 2.6.16-rc1: multiple ipv6 failures

[Jeff Garzik]

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Just moved my firewall/gateway from 2.6.15 to 2.6.16-rc1, and had a
couple IPv6-related problems really bite me.

1) radvd runs at 100% CPU (CentOS 4 userland, 2.6.15 worked fine).  I
had to kill it.

> Jan 17 21:24:43 pretzel ifup:  done.
> Jan 17 21:24:44 pretzel ifup: radvd control enabled, but config is not complete
> Jan 17 21:24:50 pretzel radvd[4264]: version 0.7.2 started
> Jan 17 21:24:44 pretzel ifup: ERROR    : [ipv6_trigger_radvd] Given pidfile '/var/run/radvd/radvd.pid' doesn't exist, cannot send trigger to radvd
> Jan 17 21:24:50 pretzel radvd: radvd startup succeeded


2) bind fails (which everyone on my network immediately noticed, and
complained about).

> Jan 17 21:29:04 pretzel named[5110]: loading configuration from '/etc/named.conf'
> Jan 17 21:29:04 pretzel named[5110]: /proc/net/if_inet6:sscanf() -> 1 (expected 6)
> Jan 17 21:29:04 pretzel named[5110]: interfacemgr.c:827: unexpected error:
> Jan 17 21:29:04 pretzel named[5110]: interface iteration failed: failure
> Jan 17 21:29:04 pretzel named[5110]: not listening on any interfaces
> Jan 17 21:29:04 pretzel named[5110]: command channel listening on 127.0.0.1#953
> Jan 17 21:29:04 pretzel named[5110]: /proc/net/if_inet6:sscanf() -> 1 (expected 6)
> Jan 17 21:29:04 pretzel named[5110]: interfacemgr.c:827: unexpected error:
> Jan 17 21:29:04 pretzel named[5110]: interface iteration failed: failure

Again, 2.6.15 works just fine.

Config attached.  32-bit x86 uniprocessor w/ HT (thus, SMP config).

	Jeff




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Re: net 2.6.16-rc1: multiple ipv6 failures

[Patrick McHardy]

Jeff Garzik wrote:
> 
> Just moved my firewall/gateway from 2.6.15 to 2.6.16-rc1, and had a
> couple IPv6-related problems really bite me.

The fix just went in Linus' tree ([IPV6]: Preserve procfs IPV6 address
output format).

Re: net 2.6.16-rc1: multiple ipv6 failures

[David S. Miller]

From: Jeff Garzik <jgarzik@pobox.com>
Date: Tue, 17 Jan 2006 21:39:20 -0500

> 2) bind fails (which everyone on my network immediately noticed, and
> complained about).
> 
> > Jan 17 21:29:04 pretzel named[5110]: loading configuration from '/etc/named.conf'
> > Jan 17 21:29:04 pretzel named[5110]: /proc/net/if_inet6:sscanf() -> 1 (expected 6)
> > Jan 17 21:29:04 pretzel named[5110]: interfacemgr.c:827: unexpected error:
> > Jan 17 21:29:04 pretzel named[5110]: interface iteration failed: failure
> > Jan 17 21:29:04 pretzel named[5110]: not listening on any interfaces
> > Jan 17 21:29:04 pretzel named[5110]: command channel listening on 127.0.0.1#953
> > Jan 17 21:29:04 pretzel named[5110]: /proc/net/if_inet6:sscanf() -> 1 (expected 6)
> > Jan 17 21:29:04 pretzel named[5110]: interfacemgr.c:827: unexpected error:
> > Jan 17 21:29:04 pretzel named[5110]: interface iteration failed: failure

Known problem, fixed by Yoshifuji in current GIT.  /proc/net/if_net6's
output format got mistakedly changed, and this confused named and
ifconfig, among other things.

Re: net 2.6.16-rc1: multiple ipv6 failures

[Simon Kelley]

David S. Miller wrote:

> Known problem, fixed by Yoshifuji in current GIT.  /proc/net/if_net6's
> output format got mistakedly changed, and this confused named and
> ifconfig, among other things.

For reference, add dnsmasq to the list of confused userspace: the 
signature error is:

failed to find list of interfaces: No such device

Cheers,

Simon.